Edgar Filing: Nuveen Build America Bond Fund

nbb.htm

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM N-CSR

CERTIFIED SHAREHOLDER REPORT OF

REGISTERED MANAGEMENT INVESTMENT COMPANIES

Investment Company Act file number 811-22391

Nuveen Build America Bond Fund

(Exact name of registrant as specified in charter)

Nuveen Investments

333 West Wacker Drive

Chicago, IL 60606

(Address of principal executive offices) (Zip code)

Kevin J. McCarthy

Nuveen Investments

333 West Wacker Drive

Chicago, IL 60606

(Name and address of agent for service)

Registrant's telephone number, including area code: (312) 917-7700

Date of fiscal year end: March 31

Date of reporting period: March 31, 2014

Form N-CSR is to be used by management investment companies to file reports with the Commission not later than 10 days after the transmission to stockholders of any report that is required to be transmitted to stockholders under Rule 30e-1 under the Investment Company Act of 1940 (17 CFR 270.30e-1). The Commission may use the information provided on Form N-CSR in its regulatory, disclosure review, inspection, and policymaking roles.

A registrant is required to disclose the information specified by Form N-CSR, and the Commission will make this information public. A registrant is not required to respond to the collection of information contained in Form N-CSR unless the Form displays a currently valid Office of Management and Budget (“OMB”) control number. Please direct comments concerning the accuracy of the information collection burden estimate and any suggestions for reducing the burden to Secretary, Securities and Exchange Commission, 450 Fifth Street, NW, Washington, DC 20549-0609. The OMB has reviewed this collection of information under the clearance requirements of 44 U.S.C. ss. 3507.

ITEM 1. REPORTS TO STOCKHOLDERS.

Nuveen Investments to be acquired by TIAA-CREF

On April 14, 2014, TIAA-CREF announced that it had entered into an agreement to acquire Nuveen Investments, the parent company of your fund’s investment adviser, Nuveen Fund Advisors, LLC (“NFAL”) and the Nuveen affiliates that act as sub-advisers to the majority of the Nuveen Funds. TIAA-CREF is a national financial services organization with approximately $569 billion in assets under management (as of March 31, 2014) and is a leading provider of retirement services in the academic, research, medical and cultural fields. Nuveen anticipates that it will operate as a separate subsidiary within TIAA-CREF’s asset management business, and that its current leadership and key investment teams will stay in place.

Your Fund investment will not change as a result of Nuveen’s change of ownership. You will still own the same Fund shares and the underlying value of those shares will not change as a result of the transaction. NFAL and your Fund’s sub-adviser(s) will continue to manage your Fund according to the same objectives and policies as before, and we do not anticipate any significant changes to your Fund’s operations. Under the securities laws, the consummation of the transaction will result in the automatic termination of the investment management agreements between the Funds and NFAL and the investment sub-advisory agreements between NFAL and each Fund’s sub-adviser(s). New agreements will be presented to the Funds’ shareholders for approval, and, if approved, will take effect upon consummation of the transaction or such later time as shareholder approval is obtained.

The transaction, expected to be completed by year end, is subject to customary closing conditions.

Table of Contents

Chairman’s Letter to Shareholders	4

Portfolio Manager’s Comments	5

Fund Leverage	9

Share Information	10

Risk Considerations	12

Performance Overview and Holding Summaries	13

Report of Independent Registered Public Accounting Firm	17

Portfolios of Investments	18

Statement of Assets and Liabilities	29

Statement of Operations	30

Statement of Changes in Net Assets	31

Statement of Cash Flows	32

Financial Highlights	34

Notes to Financial Statements	36

Additional Fund Information	47

Glossary of Terms Used in this Report	48

Reinvest Automatically, Easily and Conveniently	50

Board Members & Officers	51

Nuveen Investments

Chairman’s Letter to Shareholders

Dear Shareholders,

Despite headwinds from slow growth, fiscal and political uncertainty in many countries and some fragile economies around the world, domestic and international equity markets increased significantly in 2013. The emerging markets equity sector was an exception. Other sectors, such as real estate, were flat to down a bit and commodities were notably negative in total return performance. The fixed income market also experienced losses in many sectors.

U.S. equities in particular hit numerous all-time highs during the past year, exceeding prior rising market trends. Europe and Asia struggled with political and financial stresses but Europe’s improving GDP in the second half provided hope that the region can exit recession. In Japan, the economic policies advocated by Prime Minister Shinzo Abe became a positive influence on the economy as deflationary pressures declined, while the economy in China started to stabilize due to monetary easing and supply side reforms. On the domestic front, the Federal Reserve stimulus continued throughout the year but discussion of reductions in the stimulus program caused historically low rates to rise and added to concern that interest rates could rise quickly in the near future. This provided challenges for fixed income investors.

The Federal Reserve’s decision to slow down its bond buying program beginning in December 2013, and the federal budget compromise over government spending into early 2015 were positive signs that the domestic economy is moving forward. We are beginning to experience an economy that can provide encouraging conditions for GDP growth, job growth and low inflation. Additionally, downward trending unemployment and a continuing rebound in the housing market adds to a positive economic scenario going forward.

However, the current year has experienced a tumultuous start. It is in these particularly volatile markets that professional investment management is most important. Investment teams who have experienced challenging markets in the past understand how their asset class can behave in rapidly changing times. Remaining committed to their investment disciplines during these times is a critical component to achieving long-term success. In fact, many strong investment track records are established during challenging periods because experienced investment teams understand that volatile markets place a premium on companies and investment ideas that can weather the short-term volatility. By maintaining appropriate time horizons, diversification and relying on practiced investment teams, we believe that investors can achieve their long-term investment objectives.

As always, I encourage you to communicate with your financial consultant if you have any questions about your investment in a Nuveen Fund. On behalf of the other members of the Nuveen Fund Board, we look forward to continuing to earn your trust in the months and years ahead.

William J. Schneider

Chairman of the Board

May 23, 2014

Nuveen Investments

Portfolio Manager’s Comments

Nuveen Build America Bond Fund (NBB)

Nuveen Build America Bond Opportunity Fund (NBD)

These Funds feature portfolio management by Nuveen Asset Management, LLC, an affiliate of Nuveen Investments. Portfolio manager Daniel J. Close, CFA, reviews U.S. economic and municipal market conditions, key investment strategies and the twelvemonth performance of the Nuveen Build America Bond Fund (NBB) and the Nuveen Build America Bond Opportunity Fund (NBD). Dan has managed NBB and NBD since their inceptions in April 2010 and November 2010, respectively.

What factors affected the U.S. economy and the national municipal market during the twelve-month reporting period ended March 31, 2014?

During this reporting period, the U.S. economy’s progress toward recovery from recession continued, although the economy remained below peak levels. The Federal Reserve (Fed) maintained its efforts to bolster growth and promote progress toward its mandates of maximum employment and price stability by holding the benchmark fed funds rate at the record low level of zero to 0.25% that it established in December 2008. Based on its view that the underlying strength in the broader economy was enough to support ongoing improvement in the labor market, the Fed began to reduce, or taper, its monthly asset purchases in $10 billion increments over the course of four consecutive meetings (December 2013 through April 2014). As of May 2014, the Fed’s monthly purchases comprise $20 billion in mortgage-backed securities (versus the original $40 billion per month) and $25 billion in longer-term Treasury securities (versus $45 billion). Following the April 2014 meeting (subsequent to the end of this reporting period), the Fed reiterated that it would continue to look at a wide range of factors, including labor market conditions, indicators of inflationary pressures and readings on financial developments, in determining future actions, saying that it would likely maintain the current target range for the fed funds rate for a considerable time after the asset purchase program ends, especially if projected inflation continues to run below the Fed’s 2% longer-run goal.

In the first quarter of 2014, the U.S. economy, as measured by the U.S. gross domestic product (GDP), grew at an annualized rate of 0.1%, compared with 2.6% in the fourth quarter of 2013. While consumer spending, the main driver of the U.S. economy, made a strong showing, growth during this period was restrained primarily by sharp declines in business investment in equipment and home construction. The Consumer Price Index (CPI) rose 1.5% year-over-year as of March 2014, while the core CPI (which excludes food and energy) increased 1.7% during the same period, staying within the Fed’s unofficial objective of 2.0% or lower for this inflation measure. As of March 2014, the national unemployment rate was 6.7%, an improvement from the 7.5% reported in March 2013, but still higher than levels that would provide consistent support for optimal GDP growth. The housing market continued to post gains, as the average home price in the S&P/Case-Shiller Index of 20 major metropolitan areas rose 12.9% for the twelve months ended February 2014 (most recent data available at the time this report was prepared). This brought the average U.S. home price back to mid-2004 levels, although prices continued to be down approximately 20% from their mid-2006 peak.

Certain statements in this report are forward-looking statements. Discussions of specific investments are for illustration only and are not intended as recommendations of individual investments. The forward-looking statements and other views expressed herein are those of the portfolio manager as of the date of this report. Actual future results or occurrences may differ significantly from those anticipated in any forward-looking statements, and the views expressed herein are subject to change at any time, due to numerous market and other factors. The Funds disclaim any obligation to update publicly or revise any forward-looking statements or views expressed herein.

Ratings shown are the highest rating given by one of the following national rating agencies: Standard & Poor’s, (S&P) Moody’s Investors Service, Inc. (Moody’s) or Fitch, Inc. (Fitch) Credit ratings are subject to change. AAA, AA, A, and BBB are investment grade ratings; BB, B, CCC, CC, C and D are below investment grade ratings. Certain bonds backed by U.S. government or agency securities are regarded as having an implied rating equal to the rating of such securities. Holdings designated N/R are not rated by these national rating agencies.

Bond insurance guarantees only the payment of principal and interest on the bond when due, and not the value of the bonds themselves, which will fluctuate with the bond market and the financial success of the issuer and the insurer. Insurance relates specifically to the bonds in the portfolio and not to the share prices of a Fund. No representation is made as to the insurers’ ability to meet their commitments.

Nuveen Investments

Portfolio Manager’s Comments (continued)

As this reporting period began, continued political debate over federal spending clouded the outlook for the U.S. economy, as lawmakers failed to reach a resolution on spending cuts intended to address the federal budget deficit. Even after the lack of resolution triggered a program of automatic spending cuts (or sequestration) that impacted federal programs, the federal budget for Fiscal 2014 remained under debate. On October 1, 2013, the start date for Fiscal 2014, the federal government shut down for 16 days until an interim appropriations bill was signed into law, funding the government at sequestration levels through January 15, 2014 and suspending the debt limit until February 2014. Consensus on a $1.1 trillion federal spending bill was finally reached in January 2014, and in February 2014, members of Congress agreed to suspend the $16.7 trillion debt ceiling until March 2015.

In June 2013, then-Fed Chairman Ben Bernanke’s remarks about potentially tapering the Fed’s asset purchase program touched off widespread uncertainty about the next step for the Fed’s quantitative easing program and its impact on the economy and financial markets. This led to increased market volatility, which was compounded by headline credit stories involving Detroit’s bankruptcy filing in July 2013, the largest municipal bankruptcy in history, and the disappointing news that continued to come out of Puerto Rico, where a struggling economy and years of deficit spending and borrowing resulted in multiple downgrades on the commonwealth’s bonds. In this unsettled environment, the Treasury market traded off, the municipal market followed suit and spreads widened as investor concern grew, prompting increased selling by bondholders across the fixed income markets.

Fundamentals on municipal bonds remained strong, as state governments made good progress in dealing with budget issues. Due to strong growth in personal tax and sales tax collections, year-over-year totals for state tax revenues have increased for 16 consecutive quarters, while on the expense side, the states made headway in cutting and controlling costs, with more than 40 states implementing some type of pension reform.

What key strategies were used to manage NBB and NBD during the twelve-month reporting period ended March 31, 2014?

As previously discussed, during the first part of this reporting period, uncertainty about the future of the Fed’s quantitative easing program and headline credit stories involving Detroit and Puerto Rico led to an unsettled environment and increased selling by bondholders across the fixed income markets. The second half of the reporting period brought greater stability and a municipal market rally driven by stronger demand and tight supply. Overall, the performance of the Build America Bonds (BAB) market was negative for the reporting period, reflecting rising rates and the decrease in price of longer dated Treasuries.

NBB and NBD are designed to invest primarily in BABs and other taxable municipal bonds. The primary investment objective of these two Funds is to provide current income through investments in taxable municipal securities. Their secondary objective is to seek enhanced portfolio value and total return. The Funds offer strategic portfolio diversification opportunities for traditional municipal bond investors, while providing investment options to investors that have not traditionally purchased municipal bonds, including public and corporate retirement plans, endowments, life insurance companies and sovereign wealth funds. For these investors, the Funds can offer investment grade municipal credit, current income and strong call protection.

With the end of the BAB new issuance program in 2010, our focus continued to be taking advantage of opportunities to add value and improve the liquidity profiles of both NBB and NBD by purchasing additional benchmark BAB issues in the secondary market. Benchmark BAB issues, which typically offer more liquidity than their non-benchmark counterparts, are defined as BABs over $250 million in size and therefore eligible for inclusion in the Barclays Build America Bond Index. Their greater liquidity makes them potentially easier to sell at Fund termination. In contrast, non-benchmark BABs generally are smaller issues that may offer the same credit quality as benchmark BABs, but sometimes require more detailed credit reviews before purchase and consequently may be less liquid.

Nuveen Investments

Overall, our strategy during this reporting period was to continue to add value by pursuing active management and implementing relative value trades as we found attractive opportunities. In NBB, we purchased California general obligation (GO) BABs and added to our position in high yielding North Las Vegas water and wastewater improvement BABs, while NBD purchased BABs issued for the Nashville Convention Center. Both NBB and NBD also added a number of “odd lot matchers,” that is, additions to positions in BABs that we already held in our portfolios, most of which were index eligible. NBB also continued to purchase taxable municipal bonds in the primary market, including bonds issued for Houston public utilities.

In addition, just prior to the beginning of this reporting period, the failure of Congress to reach a resolution on spending cuts intended to address the federal budget deficit triggered sequestration, or a program of automatic spending cuts. As part of this program, the original 35% subsidy on BABs was cut to approximately 32%. This reduction, in turn, had an impact on the small percentage of BABs that included par call provisions, which gave issuers the right to call these BABs at par in the event of a subsidy cut by the federal government. Following sequestration, as the market began to price these BABs at very low levels that reflected their risk, we viewed this as an opportunity to purchase a few select positions in these BABs in both Funds.

Cash for purchases in NBB was generated primarily by sales of some of the Fund’s few remaining non-benchmark holdings, including BABs for two public utility districts in Washington state, a higher education issue and an appropriations credit. In NBD, we sold three GO credits. In general, these sales were part of our relative value approach, with proceeds reinvested to increase our holdings of index-eligible BABs and enhance liquidity.

Shareholders should note that, because there was no new issuance of BABs or similar U.S. Treasury-subsidized taxable municipal bonds for the 24-month period ended December 31, 2012, the Funds’ contingent term provisions went into effect on January 1, 2013. During this reporting period ended March 31, 2014, NBB and NBD were managed in line with termination dates on or around June 30, 2020, and December 31, 2020, respectively, with the distribution of the Funds’ assets to shareholders planned for those times. We continued our efforts to maximize the Funds’ liquidity and better position NBB and NBD for termination. Even though the Funds are scheduled to terminate, we believe the opportunity still exists to add value for the shareholders of these Funds through active management and strong credit research.

How did these Funds perform over the twelve-month reporting period ended March 31, 2014?

The tables in each Fund's Performance Overview and Holding Summaries section of this report provide the Funds’ total returns for the one-year and since-inception periods ended March 31, 2014. Each Fund's total returns are compared with the performance of a corresponding market index.

For the twelve-month reporting period ended March 31, 2014, the total returns on common share net asset value (NAV) for NBB and NBD exceeded the return for the Barclays Build America Bond Index. Key management factors that influenced the returns of NBB and NBD during this reporting period included duration and yield curve positioning, the use of derivatives, credit exposure and sector allocation.

Duration and yield curve positioning relative to the index was a positive contributor to the performance of NBB, which generally was underweighted in the underperforming longest segment of the curve and overweighted in the shorter segments that performed best. The largest detractor from NBD’s performance for the reporting period was the negative impact of the Fund’s overweightings at the longest end of the curve.

Nuveen Investments

Portfolio Manager’s Comments (continued)

As part of their approach to investing, NBB and NBD use an integrated leverage and hedging strategy in their efforts to enhance current income and total return, while working to maintain a level of interest rate risk similar to that of the Barclays Build America Bond Index. As part of this integrated strategy, both NBB and NBD used inverse floating rate securities and bank borrowings as leverage to potentially magnify performance. At the same time, the Funds used interest rate swaps to reduce their leverage-adjusted durations to a level close to that of the Barclays Build America Bond Index. In addition, the Funds entered into staggered interest rate swaps to partially fix the interest cost of leverage. During this reporting period, as rates rose and bonds with shorter maturities outperformed, the use of inverse floaters had a modestly positive impact on the Funds’ performance. However, because NBB and NBD also were using swaps to short long interest rates at a time when rates were rising, the use of swaps had only a modest positive impact on the Funds’ total return performance. Leverage is discussed in more detail later in this report.

Credit rating exposure also was a factor in the Funds’ performance. In general, NBB and NBD benefited from their overweightings in AA- and A-rated bonds and their smaller exposures to AAA-rated bonds, which underperformed.

The Funds’ sector allocations were well diversified, with the heaviest weightings in GO and other tax-supported bonds, transportation, water and sewer and utilities. The overall impact of sector allocation was positive for both Funds.

Given the headline news about credit downgrades on Puerto Rico debt and Detroit’s bankruptcy filing in July 2013, we should note that neither NBB nor NBD has any exposure to Puerto Rico BABs. Both Funds hold BABs rated Aa2 issued for the Detroit City School District that are backed by the state of Michigan. In late September 2013, NBB also added a position in high coupon taxable GO bonds issued by Wayne County, Michigan. Neither the Detroit City School District nor Wayne County are part of the Detroit bankruptcy filing.

Nuveen Investments

Fund Leverage

IMPACT OF THE FUNDS’ LEVERAGE STRATEGIES ON PERFORMANCE

One important factor impacting the returns of the Funds relative to their comparative benchmark was the Funds’ use of leverage through bank borrowings and investments in inverse floating rate securities, which represent leveraged investments in underlying bonds. The Funds use leverage because our research has shown that, over time, leveraging provides opportunities for additional income, particularly in the recent market environment where short-term market rates are at or near historical lows, meaning that the short-term rates the Fund has been paying on its leveraging instruments have been much lower than the interest the Fund has been earning on its portfolio of long-term bonds that it has bought with the proceeds of that leverage. However, use of leverage also can expose the Fund to additional price volatility. When a Fund uses leverage, the Fund will experience a greater increase in its net asset value if the municipal bonds acquired through the use of leverage increase in value, but it will also experience a correspondingly larger decline in its net asset value if the bonds acquired through leverage decline in value, which will make the Fund’s net asset value more volatile, and its total return performance more variable over time. In addition, income in levered funds will typically decrease in comparison to unlevered funds when short-term interest rates increase and increase when short-term interest rates decrease. Leverage had a modestly positive impact on the performance of the Funds over this reporting period.

As of March 31, 2014, the Funds’ percentages of effective and regulatory leverage are as shown in the accompanying table.

	NBB	NBD
Effective Leverage*	29.12%	29.23%
Regulatory Leverage*	13.55%	6.58%

Effective leverage is a Fund’s effective economic leverage, and includes both regulatory leverage and the leverage effects of certain derivative and other investments in a Fund’s portfolio that increase the Fund’s investment exposure. Currently, the leverage effects of Tender Option Bond (TOB) inverse floater holdings are included in effective leverage values, in addition to any regulatory leverage. Regulatory leverage consists of preferred shares issued or borrowings of a Fund. Both of these are part of a Fund’s capital structure. Regulatory leverage is subject to asset coverage limits set forth in the Investment Company Act of 1940.

THE FUNDS’ REGULATORY LEVERAGE

Bank Borrowings

As discussed previously, the Funds employ regulatory leverage through the use of bank borrowings. As of March 31, 2014, the Funds have outstanding bank borrowings as shown in the accompanying table.

			NBB			NBD
Bank Borrowings		$	89,000,000		$	11,500,000

Refer to Notes to Financial Statements, Note 8 - Borrowing Arrangements for further details.

Nuveen Investments

Share Information

DIVIDEND INFORMATION

The following information regarding the Funds’ distributions is current as of March 31, 2014. Each Fund’s distribution levels may vary over time based on each Fund’s investment activity and portfolio investment value changes.

During the current reporting period, each Fund’s monthly dividends to shareholders were as shown in the accompanying table.

	Per Share Amounts
Ex-Dividend Date		NBB		NBD
April 2013	$	0.1135	$	0.1105
May		0.1135		0.1105
June		0.1135		0.1105
July		0.1135		0.1105
August		0.1135		0.1105
September		0.1160		0.1140
October		0.1160		0.1140
November		0.1160		0.1140
December		0.1160		0.1140
January		0.1160		0.1140
February		0.1160		0.1140
March 2014		0.1160		0.1140

Non-recurring supplemental taxable distribution**		0.0208		—
Market Yield***		7.09%		6.67%

**	Distribution paid in December 2013.
***	Market Yield is based on the Fund’s current annualized monthly dividend divided by the Fund’s current market price as of the end of the reporting period.

The Funds in this report seek to pay stable dividends at rates that reflect each Fund’s past results and projected future performance. During certain periods, each Fund may pay dividends at a rate that may be more or less than the amount of net investment income actually earned by the Fund during the period. If a Fund has cumulatively earned more than it has paid in dividends, it holds the excess in reserve as undistributed net investment income (UNII) as part of the Fund’s NAV. Conversely, if a Fund has cumulatively paid dividends in excess of its earnings, the excess constitutes negative UNII that is likewise reflected in the Fund’s NAV. Each Fund will, over time, pay all of its net investment income as dividends to shareholders. As of March 31, 2014, both Funds had positive UNII balances for tax purposes. NBD had a positive UNII balance and NBB had a negative UNII balance for financial reporting purposes.

Nuveen Investments

SHARE REPURCHASES

During November 2013, the Nuveen Funds’ Board of Directors/Trustees reauthorized the Funds’ open-market share repurchase program, allowing each Fund to repurchase an aggregate of up to approximately 10% of its outstanding shares.

As of March 31, 2014, and since the inception of the Funds’ repurchase programs, the Funds have not repurchased any of their outstanding shares.

	NBB	NBD
Shares Cumulatively Repurchased and Retired	—	—
Shares Authorized for Repurchase	2,645,000	720,000

OTHER SHARE INFORMATION

As of March 31, 2014, and during the current reporting period, the Funds’ share prices were trading at a premium/(discount) to their NAVs as shown in the accompanying table.

		NBB			NBD
NAV	$	21.45		$	22.68
Share Price	$	19.62		$	20.50
Premium/(Discount) to NAV		(8.53	)%		(9.61	)%
12-Month Average Premium/(Discount) to NAV		(9.03	)%		(9.93	)%

Nuveen Investments

Risk Considerations

Fund shares are not guaranteed or endorsed by any bank or other insured depository institution, and are not federally insured by the Federal Deposit Insurance Corporation. Past performance is no guarantee of future results. Fund shares are subject to a variety of risks, including:

Investment, Price and Market Risk. An investment in shares is subject to investment risk, including the possible loss of the entire principal amount that you invest. Your investment in shares represents an indirect investment in the municipal securities owned by the Fund, which generally trade in the over-the-counter markets. Shares of closed-end investment companies like these Funds frequently trade at a discount to their net asset value (NAV). Your shares at any point in time may be worth less than your original investment, even after taking into account the reinvestment of Fund dividends and distributions.

Build America Bonds Risk. BABs are a form of municipal financing, and the market is smaller, less diverse and potentially less liquid than other types of municipal securities. In addition, bonds issued after December 31, 2010, will not qualify as BABs unless the relevant section of the program is extended. Consequently, if the program is not extended, BABs may be less actively traded which may negatively affect the value of BABs held by the Fund.

Leverage Risk. Each Fund’s use of leverage creates the possibility of higher volatility for the Fund’s per share NAV, market price, distributions and returns. There is no assurance that a Fund’s leveraging strategy will be successful. Certain aspects of the recently adopted Volcker Rule may limit the availability of tender option bonds, which are used by the Funds for leveraging and duration management purposes. The effects of this new Rule, expected to take effect in mid-2015, may make it more difficult for a Fund to maintain current or desired levels of leverage and may cause the Fund to incur additional expenses to maintain its leverage.

Tax Risk. The tax treatment of Fund distributions may be affected by new IRS interpretations of the Internal Revenue Code and future changes in tax laws and regulations.

Issuer Credit Risk. This is the risk that a security in a Fund’s portfolio will fail to make dividend or interest payments when due.

Interest Rate Risk. Fixed-income securities such as bonds, preferred, convertible and other debt securities will decline in value if market interest rates rise.

Reinvestment Risk. If market interest rates decline, income earned from a Fund’s portfolio may be reinvested at rates below that of the original bond that generated the income.

Call Risk or Prepayment Risk. Issuers may exercise their option to prepay principal earlier than scheduled, forcing a Fund to reinvest in lower-yielding securities.

Inverse Floater Risk. The Funds invest in inverse floaters. Due to their leveraged nature, these investments can greatly increase a Fund’s exposure to interest rate risk and credit risk. In addition, investments in inverse floaters involve the risk that the Fund could lose more than its original principal investment.

Derivatives Strategy Risk. Derivative securities, such as calls, puts, warrants, swaps and forwards, carry risks different from, and possibly greater than, the risks associated with the underlying investments.

Nuveen Investments

NBB
	Nuveen Build America Bond Fund
	Performance Overview and Holding Summaries as of March 31, 2014

Refer to the Glossary of Terms used in this Report for further definition of the terms used within this page.

Average Annual Total Returns as of March 31, 2014

	Average Annual
		Since
	1-Year	Inception	1
NBB at NAV	1.44%	9.84%
NBB at Share Price	0.63%	6.51%
Barclays Build America Bond Index	(0.47)%	9.68%

Past performance is not predictive of future results. Current performance may be higher or lower than the data shown. Returns do not reflect the deduction of taxes that shareholders may have to pay on Fund distributions or upon the sale of Fund shares. Comparative index return information is provided for the Fund’s shares at NAV only. Indexes are not available for direct investment.

1	Since inception returns are from 4/27/10.

Nuveen Investments

Performance Overview and Holding Summaries as of March 31, 2014 (continued)

This data relates to the securities held in the Fund’s portfolio of investments as of the end of the reporting period. It should not be construed as a measure of performance for the Fund itself. Holdings are subject to change.

Ratings shown are the highest rating given by one of the following national rating agencies: Standard & Poor’s Group, Moody’s Investors Service, Inc. or Fitch, Inc. Credit ratings are subject to change. AAA, AA, A and BBB are investment grade ratings; BB, B, CCC, CC, C and D are below-investment grade ratings. Certain bonds backed by U.S. Government or agency securities are regarded as having an implied rating equal to the rating of such securities. Holdings designated N/R are not rated by these national rating agencies.

Fund Allocation
(% of net assets)
Municipal Bonds	120.9%
Short-Term Investments	0.2%
Borrowings	(15.7)%
Floating Rate Obligations	(9.4)%
Other Assets Less Liabilities	4.0%

Credit Quality2
(% of total investment exposure)
AAA/U.S. Guaranteed	9.9%
AA	54.4%
A	27.9%
BBB	5.7%
BB or Lower	1.1%
N/R (not rated)	0.9%
N/A (not applicable)	0.1%

Portfolio Composition2
(% of total investments)
Tax Obligation/Limited	24.6%
Tax Obligation/General	22.7%
Transportation	17.7%
Utilities	16.6%
Water and Sewer	13.6%
Short-Term Investments	0.2%
Other Industries	4.6%

States2
(as a % of total long-term investments)
California	22.0%
Illinois	12.5%
New York	10.3%
Texas	8.8%
Ohio	5.6%
Michigan	4.4%
South Carolina	4.3%
Nevada	4.1%
Georgia	4.1%
Louisiana	3.2%
New Jersey	3.1%
Other States	17.6%

2	Excluding investments in derivatives.

Nuveen Investments

NBD
	Nuveen Build America Bond Opportunity Fund
	Performance Overview and Holding Summaries as of March 31, 2014

Refer to the Glossary of Terms used in this Report for further definition of the terms used within this page.

Average Annual Total Returns as of March 31, 2014

	Average Annual
		Since
	1-Year	Inception
NBD at NAV	0.76%	11.83%
NBD at Share Price	(0.85)%	7.53%
Barclays Build America Bond Index	(0.47)%	11.41%

1	Since inception returns are from 11/23/10.

Nuveen Investments

Performance Overview and Holding Summaries as of March 31, 2014 (continued)

Fund Allocation
(% of net assets)
Municipal Bonds	106.6%
Short-Term Investments	0.2%
Borrowings	(7.0)%
Floating Rate Obligations	(4.4)%
Other Assets Less Liabilities	4.6%

Credit Quality2
(% of total investment exposure)
AAA/U.S. Guaranteed	12.2%
AA	65.6%
A	16.7%
BBB	2.9%
BB or Lower	1.7%
N/R (not rated)	0.8%
N/A (not applicable)	0.1%

Portfolio Composition2
(% of total investments)
Tax Obligation/Limited	33.5%
Transportation	17.3%
Water and Sewer	16.3%
Utilities	13.6%
Tax Obligation/General	12.1%
Short-Term Investments	0.2%
Other Industries	7.0%

States2
(as a % of total long-term investments)
California	18.8%
Illinois	13.4%
New York	11.4%
South Carolina	8.2%
New Jersey	6.5%
Colorado	4.3%
Michigan	4.1%
Ohio	3.9%
Texas	3.8%
Georgia	3.5%
Nevada	3.0%
Other States	19.1%

2 Excluding investments in derivatives.

Nuveen Investments

Report of Independent Registered Public Accounting Firm

The Board of Trustees and Shareholders of

Nuveen Build America Bond Fund

Nuveen Build America Bond Opportunity Fund

We have audited the accompanying statements of assets and liabilities, including the portfolios of investments, of Nuveen Build America Bond Fund and Nuveen Build America Bond Opportunity Fund (the “Funds”) as of March 31, 2014, and the related statements of operations and cash flows for the year then ended, the statements of changes in net assets for each of the two years in the period then ended and the financial highlights for each of the periods indicated therein. These financial statements and financial highlights are the responsibility of the Funds’ management. Our responsibility is to express an opinion on these financial statements and financial highlights based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements and financial highlights are free of material misstatement. We were not engaged to perform an audit of the Funds’ internal control over financial reporting. Our audits included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Funds’ internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements and financial highlights, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. Our procedures included confirmation of securities owned as of March 31, 2014, by correspondence with the custodian, counterparties and brokers or by other appropriate auditing procedures where replies from brokers were not received. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the financial statements and financial highlights referred to above present fairly, in all material respects, the financial positions of Nuveen Build America Bond Fund and Nuveen Build America Bond Opportunity Fund at March 31, 2014, and the results of their operations and their cash flows for the year then ended, the changes in their net assets for each of the two years in the period then ended and the financial highlights for each of the periods indicated therein, in conformity with U.S. generally accepted accounting principles.

Chicago, Illinois

May 27, 2014

Nuveen Investments

NBB
	Nuveen Build America Bond Fund
	Portfolio of Investments
		March 31, 2014

	Principal		Optional Call
	Amount (000)	Description (1)	Provisions (2)	Ratings (3)		Value
		LONG-TERM INVESTMENTS 120.9% (99.8% of Total Investments)
		MUNICIPAL BONDS – 120.9% (99.8% of Total Investments)
		Alabama – 0.3% (0.3% of Total Investments)
$	2,000	Baptist Health Care Authority, Alabama, An Affiliate of UAB Health System, Taxable Bond Series 2013A, 5.500%, 11/15/43	No Opt. Call	A3	$	1,853,020
		Arizona – 1.7% (1.4% of Total Investments)
	4,070	Downtown Phoenix Hotel Corporation, Arizona, Revenue Bonds, Subordinate Lien Series 2005C, 5.290%, 7/01/18 – FGIC Insured	No Opt. Call	AA–		4,106,589
	5,000	Mesa, Arizona, Utility System Revenue Bonds, Series 2010, 6.100%, 7/01/34	7/20 at 100.00	Aa2		5,478,250
	9,070	Total Arizona				9,584,839
		California – 26.6% (22.0% of Total Investments)
	1,520	Alameda Corridor Transportation Authority, California, User Fee Revenue Bonds, Subordinate Lien Series 2004B, 0.000%, 10/01/31 – AMBAC Insured	No Opt. Call	BBB+		441,560
	150	Bay Area Toll Authority, California, Revenue Bonds, San Francisco Bay Area Toll Bridge, Build America Federally Taxable Bond Series 2009F-2, 6.263%, 4/01/49	No Opt. Call	AA		194,739
	75	Bay Area Toll Authority, California, Revenue Bonds, San Francisco Bay Area Toll Bridge, Subordinate Lien, Build America Federally Taxable Bond Series 2010S-1, 6.793%, 4/01/30	No Opt. Call	A+		91,875
	500	California Infrastructure and Economic Development Bank, Revenue Bonds, University of California San Francisco Neurosciences Building, Build America Taxable Bond Series 2010B, 6.486%, 5/15/49	No Opt. Call	AA–		584,330
	465	California Municipal Finance Authority Charter School Revenue Bonds, Albert Einstein Academies Project, Taxable Series 2013B, 7.000%, 8/01/18	No Opt. Call	BB		461,931
	3,005	California State Public Works Board, Lease Revenue Bonds, Various Capital Projects, Build America Taxable Bond Series 2009G-2, 8.361%, 10/01/34	No Opt. Call	A2		3,797,569
	2,050	California State Public Works Board, Lease Revenue Bonds, Various Capital Projects, Build America Taxable Bond Series 2010A-2, 8.000%, 3/01/35	3/20 at 100.00	A2		2,359,817
	7,000	California State University, Systemwide Revenue Bonds, Build America Taxable Bond Series 2010B, 6.484%, 11/01/41	No Opt. Call	Aa2		8,632,750
	7,115	California State, General Obligation Bonds, Various Purpose, Build America Taxable Bond Series 2010, 7.950%, 3/01/36	3/20 at 100.00	A1		8,421,456
	16,610	California State, General Obligation Bonds, Various Purpose, Build America Taxable Bond Series 2010, 7.600%, 11/01/40	No Opt. Call	A1		23,472,089
	15,000	Los Angeles Community College District, California, General Obligation Bonds, Build America Taxable Bonds, Series 2010, 6.600%, 8/01/42	No Opt. Call	Aa1		20,065,200
	10,000	Los Angeles Community College District, Los Angeles County, California, General Obligation Bonds, Series 2010, 6.600%, 8/01/42 (UB) (4)	No Opt. Call	Aa1		13,376,800
		Los Angeles County Public Works Financing Authority, California, Lease Revenue Bonds, Multiple Capital Projects I, Build America Taxable Bond Series 2010B:
	5,500	7.488%, 8/01/33	No Opt. Call	AA		6,893,040
	17,500	7.618%, 8/01/40	No Opt. Call	AA		22,979,075
	9,385	Los Angeles Department of Airports, California, Revenue Bonds, Los Angeles International Airport, Build America Taxable Bonds, Series 2009C, 6.582%, 5/15/39	No Opt. Call	AA–		11,640,028
	1,685	Los Angeles Department of Water and Power, California, Power System Revenue Bonds, Federally Taxable – Direct Payment – Build America Bonds, Series 2010D, 6.574%, 7/01/45	No Opt. Call	AA–		2,241,977
	2,000	Los Angeles Department of Water and Power, California, Water System Revenue Bonds, Tender Option Bond Trust T0003, 30.250%, 7/01/42 (IF) (4)	No Opt. Call	AA		5,529,300
	3,000	Oakland Redevelopment Agency, California, Subordinated Housing Set Aside Revenue Bonds, Federally Taxable Series 2011A-T, 7.500%, 9/01/19	No Opt. Call	A		3,424,050
	1,365	San Francisco City and County Public Utilities Commission, California, Water Revenue Bonds, Build America Taxable Bonds, Series 2010B, 6.000%, 11/01/40	No Opt. Call	AA–		1,634,560

Nuveen Investments

	Principal		Optional Call
	Amount (000)	Description (1)	Provisions (2)	Ratings (3)		Value
		California (continued)
$	3,000	San Francisco City and County Public Utilities Commission, California, Water Revenue Bonds, Build America Taxable Bonds, Series 2010G, 6.950%, 11/01/50	No Opt. Call	AA–	$	4,027,860
	4,000	San Francisco City and County, California, Certificates of Participation, 525 Golden Gate Avenue, San Francisco Public Utilities Commission Office Project, Tender Option Bond Trust B001, 29.603%, 11/01/30 (IF)	No Opt. Call	AA		7,168,800
		Stanton Redevelopment Agency, California, Consolidated Project Tax Allocation Bonds, Series 2011A:
	275	6.500%, 12/01/17	No Opt. Call	A–		302,079
	295	6.750%, 12/01/18	No Opt. Call	A–		327,143
	2,505	University of California, General Revenue Bonds, Limited Project, Build America Taxable Bond Series 2010F, 5.946%, 5/15/45	No Opt. Call	AA–		2,974,963
	114,000	Total California				151,042,991
		Colorado – 0.6% (0.5% of Total Investments)
	3,100	Denver School District 1, Colorado, General Obligation Bonds, Build America Taxable Bonds, Series 2009C, 5.664%, 12/01/33	No Opt. Call	AA+		3,564,783
		Connecticut – 1.0% (0.8% of Total Investments)
	4,500	Harbor Point Infrastructure Improvement District, Connecticut, Special Obligation Revenue Bonds, Harbor Point Project, Federally Taxable – Issuer Subsidy – Recovery Zone Economic Development Bond Series 2010B, 12.500%, 4/01/39	4/20 at 100.00	N/R		5,419,575
		Florida – 0.9% (0.8% of Total Investments)
	5,000	Florida State Board of Education, Public Education Capital Outlay Bonds, Build America Taxable Bonds, Series 2010G, 5.750%, 6/01/35	6/19 at 100.00	AAA		5,309,750
		Georgia – 4.9% (4.1% of Total Investments)
	9,000	Georgia Municipal Electric Authority, Plant Vogtle Units 3 & 4 Project J Bonds, Taxable Build America Bonds Series 2010A, 6.637%, 4/01/57	No Opt. Call	A+		10,308,780
	15,000	Georgia Municipal Electric Authority, Plant Vogtle Units 3 & 4 Project P Bonds, Refunding Taxable Build America Bonds Series 2010A, 7.055%, 4/01/57	No Opt. Call	A–		16,352,700
	2,602	Liberty County Industrial Authority, Georgia, Revenue Bonds, Series 2011C, 1.000%, 7/01/18	7/14 at 100.00	N/R		1,351,008
	26,602	Total Georgia				28,012,488
		Illinois – 15.1% (12.5% of Total Investments)
	4,200	Chicago Transit Authority, Illinois, Sales Tax Receipts Revenue Bonds, Federally Taxable Build America Bonds, Series 2010B, 6.200%, 12/01/40	No Opt. Call	AA		4,686,276
	10,925	Chicago, Illinois, General Airport Revenue Bonds, O’Hare International Airport, Third Lien, Build America Taxable Bond Series 2010B, 6.845%, 1/01/38	1/20 at 100.00	A2		11,821,287
	12,240	Chicago, Illinois, Wastewater Transmission Revenue Bonds, Build America Taxable Bond Series 2010B, 6.900%, 1/01/40	No Opt. Call	AA		13,845,398
	13,695	Chicago, Illinois, Water Revenue Bonds, Taxable Second Lien Series 2010B, 6.742%, 11/01/40	No Opt. Call	AA		16,040,680
	15,025	Cook County, Illinois, General Obligation Bonds, Build America Taxable Bonds, Series 2010D, 6.229%, 11/15/34	No Opt. Call	AA		16,308,285
	260	Illinois Finance Authority, Revenue Bonds, Illinois Institute of Technology, Refunding Series 2006A, 6.100%, 4/01/15	4/14 at 100.00	Baa3		258,515
	14,000	Illinois State, General Obligation Bonds, Taxable Build America Bonds, Series 2010-3, 6.725%, 4/01/35	No Opt. Call	A–		15,502,620
	4,660	Illinois Toll Highway Authority, Toll Highway Revenue Bonds, Build America Taxable Bonds, Senior Lien Series 2009A, 6.184%, 1/01/34	No Opt. Call	AA–		5,662,086
	1,555	Illinois Toll Highway Authority, Toll Highway Revenue Bonds, Build America Taxable Bonds, Senior Lien Series 2009B, 5.851%, 12/01/34	No Opt. Call	AA–		1,825,197
	76,560	Total Illinois				85,950,344
		Indiana – 1.0% (0.8% of Total Investments)
	5,000	Indiana University, Consolidated Revenue Bonds, Build America Taxable Bonds, Series 2010B, 5.636%, 6/01/35	6/20 at 100.00	Aaa		5,390,450

Nuveen Investments

NBB	Nuveen Build America Bond Fund
	Portfolio of Investments (continued)
		March 31, 2014

	Principal		Optional Call
	Amount (000)	Description (1)	Provisions (2)	Ratings (3)		Value
		Kentucky – 1.6% (1.3% of Total Investments)
$	5,000	Kentucky Municipal Power Agency, Power Supply System Revenue Bonds, Prairie State Project, Tender Option Bond Trust B002, 28.688%, 9/01/37 – AGC Insured (IF)	9/20 at 100.00	AA	$	6,718,000
	1,950	Louisville and Jefferson County Metropolitan Sewer District, Kentucky, Sewer and Drainage System Revenue Bonds, Build America Taxable Bonds Series 2010A, 6.250%, 5/15/43	No Opt. Call	AA		2,423,480
	6,950	Total Kentucky				9,141,480
		Louisiana – 3.9% (3.2% of Total Investments)
	20,350	East Baton Rouge Sewerage Commission, Louisiana, Revenue Bonds, Build America Taxable Bonds, Series 2010B, 6.087%, 2/01/45 (UB) (4)	2/20 at 100.00	AA		21,973,116
		Massachusetts – 0.7% (0.6% of Total Investments)
	2,000	Massachusetts, Transportation Fund Revenue Bonds, Accelerated Bridge Program, Tender Option Bond Trust T0004, 25.716%, 6/01/40 (IF) (4)	No Opt. Call	AAA		3,994,200
		Michigan – 5.4% (4.4% of Total Investments)
	13,405	Detroit City School District, Wayne County, Michigan, General Obligation Bonds, Build America Taxable Bond Series 2009B, 7.747%, 5/01/39	No Opt. Call	Aa2		14,149,380
	3,440	Michigan Tobacco Settlement Finance Authority, Tobacco Settlement Asset-Backed Revenue Bonds, Taxable Turbo Series 2006A, 7.309%, 6/01/34	No Opt. Call	B2		2,755,130
	13,955	Wayne County Building Authority, Michigan, General Obligation Bonds, Jail Facilities, Federally Taxable Recovery Zone Economic Development Series 2010, 10.000%, 12/01/40	12/20 at 100.00	BBB–		13,511,231
	30,800	Total Michigan				30,415,741
		Missouri – 0.3% (0.2% of Total Investments)
	1,290	Curators of the University of Missouri, System Facilities Revenue Bonds, Build America Taxable Bonds, Series 2009A, 5.960%, 11/01/39	No Opt. Call	AA+		1,573,297
		Nevada – 5.0% (4.1% of Total Investments)
	8,810	Clark County, Nevada, Airport Revenue Bonds, Senior Lien Series 2009B, 6.881%, 7/01/42	7/19 at 100.00	Aa2		9,674,613
	1,800	Clark County, Nevada, Airport Revenue Bonds, Taxable Direct Payment Build America Bond Series 2010C, 6.820%, 7/01/45	No Opt. Call	Aa2		2,376,324
	8,800	Las Vegas Valley Water District, Nevada, Limited Tax General Obligation Bonds, Build America Taxable Bonds, Series 2009C, 7.013%, 6/01/39	No Opt. Call	AA+		9,686,688
	1,315	Las Vegas, Nevada, Certificates of Participation, City Hall Project, Build America Federally Taxable Bonds, Series 2009B, 7.800%, 9/01/39	9/19 at 100.00	AA–		1,500,533
	5,250	North Las Vegas, Nevada, General Obligation Water and Wastewater Improvement Bonds, Build America Taxable Bonds, Series 2010A, 6.572%, 6/01/40	No Opt. Call	BB–		4,060,035
	1,060	Reno, Nevada, 1999 Special Assessment District 2 Local Improvement Bonds, ReTRAC Project, Taxable Series 2006, 6.890%, 6/01/16	No Opt. Call	BBB		1,078,932
	27,035	Total Nevada				28,377,125
		New Jersey – 3.8% (3.1% of Total Investments)
	3,100	New Jersey Turnpike Authority, Revenue Bonds, Build America Taxable Bonds, Series 2009F, 7.414%, 1/01/40	No Opt. Call	A+		4,369,884
	12,535	New Jersey Turnpike Authority, Revenue Bonds, Build America Taxable Bonds, Series 2010A, 7.102%, 1/01/41	No Opt. Call	A+		17,103,005
	15,635	Total New Jersey				21,472,889
		New York – 12.5% (10.3% of Total Investments)
	25,000	Dormitory Authority of the State of New York, State Personal Income Tax Revenue Bonds, Build America Taxable Bonds, Series 2010D, 5.600%, 3/15/40 (UB) (4)	No Opt. Call	AAA		29,253,250
	5,000	Long Island Power Authority, New York, Electric System Revenue Bonds, Build America Taxable Bond Series 2010B, 5.850%, 5/01/41	No Opt. Call	A–		5,167,950
	1,815	Metropolitan Transportation Authority, New York, Dedicated Tax Fund Bonds, Build America Taxable Bonds, Series 2010C, 7.336%, 11/15/39	No Opt. Call	AA		2,559,495
	4,980	Metropolitan Transportation Authority, New York, Transportation Revenue Bonds, Build America Taxable Bonds, Series 2009A-1, 5.871%, 11/15/39	No Opt. Call	A+		5,873,810

Nuveen Investments

	Principal		Optional Call
	Amount (000)	Description (1)	Provisions (2)	Ratings (3)		Value
		New York (continued)
$	2,595	New York City Municipal Water Finance Authority, New York, Water and Sewer System Revenue Bonds, Second Generation Resolution, Build America Taxable Bonds, Series 2010DD, 5.952%, 6/15/42	No Opt. Call	AA+	$	3,171,972
	2,025	New York City Municipal Water Finance Authority, New York, Water and Sewer System Revenue Bonds, Second Generation Resolution, Build America Taxable Bonds, Series 2010DD, 5.952%, 6/15/42 (UB)	No Opt. Call	AA+		2,475,239
	1,595	New York City Municipal Water Finance Authority, New York, Water and Sewer System Revenue Bonds, Second Generation Resolution, Taxable Tender Option Bonds Trust T30001-2, 27.039%, 6/15/44 (IF)	No Opt. Call	AA+		3,231,949
	6,340	New York City Transitional Finance Authority, New York, Building Aid Revenue Bonds, Build America Taxable Bond Fiscal 2011 Series 2010S-1B, 6.828%, 7/15/40	No Opt. Call	AA–		7,996,008
	10,000	New York City Transitional Finance Authority, New York, Future Tax Secured Bonds, Build America Taxable Bonds, Series 2010G-1, 5.467%, 5/01/40	No Opt. Call	AAA		11,051,000
	59,350	Total New York				70,780,673
		Ohio – 6.7% (5.6% of Total Investments)
		American Municipal Power Inc., Ohio, Combined Hydroelectric Projects Revenue Bonds, Federally Taxable Build America Bonds, Series 2010B:
	10,650	7.834%, 2/15/41	No Opt. Call	A		14,623,409
	5,000	8.084%, 2/15/50	No Opt. Call	A		7,281,250
	25	JobsOhio Beverage System, Ohio, Statewide Liquor Profits Revenue Bonds, Senior Lien Taxable Series 2013B, 4.532%, 1/01/35	No Opt. Call	AA		24,442
	15,000	Northeast Ohio Regional Sewer District, Wastewater Improvement Revenue Bonds, Build America Taxable Bonds, Series 2010, 6.038%, 11/15/40	11/20 at 100.00	AA+		16,276,350
	30,675	Total Ohio				38,205,451
		Oregon – 2.9% (2.3% of Total Investments)
	4,000	Oregon Department of Administrative Services, Certificates of Participation, Federally Taxable Build America Bonds, Tender Option Bond Trust TN-011, 27.234%, 5/01/35 (IF) (4)	5/20 at 100.00	AA		6,190,600
	9,080	Warm Springs Reservation Confederated Tribes, Oregon, Tribal Economic Development Bonds, Hydroelectric Revenue Bonds, Pelton Round Butte Project, Refunding Series 2009A, 8.250%, 11/01/19	No Opt. Call	A3		9,982,824
	13,080	Total Oregon				16,173,424
		Pennsylvania – 1.1% (0.9% of Total Investments)
	1,915	Commonwealth Financing Authority, Pennsylvania, State Appropriation Lease Bonds, Build America Taxable Bonds, Series 2009D, 6.218%, 6/01/39	No Opt. Call	AA–		2,251,006
	2,000	Pennsylvania State, General Obligation Bonds, Build America Taxable Bonds, Third Series 2010B, 5.850%, 7/15/30	7/20 at 100.00	Aa2		2,230,260
	1,420	Pennsylvania Turnpike Commission, Turnpike Revenue Bonds, Build America Taxable Bonds, Series 2009A, 6.105%, 12/01/39	No Opt. Call	A+		1,738,662
	5,335	Total Pennsylvania				6,219,928
		South Carolina – 5.2% (4.3% of Total Investments)
	15,000	South Carolina Public Service Authority, Electric System Revenue Bonds, Santee Cooper, Federally Taxable Build America Series 2010C, 6.454%, 1/01/50	No Opt. Call	AA–		18,193,950
	205	South Carolina Public Service Authority, Electric System Revenue Bonds, Santee Cooper, Federally Taxable Build America Tender Option Bond Trust T30002, 30.070%, 1/01/50 (IF)	No Opt. Call	AA–		423,253
	8,985	South Carolina Public Service Authority, Electric System Revenue Bonds, Santee Cooper, Federally Taxable Build America Series 2010C, 6.454%, 1/01/50 (UB)	No Opt. Call	AA–		10,898,176
	24,190	Total South Carolina				29,515,379
		South Dakota – 0.3% (0.3% of Total Investments)
	2,000	South Dakota Educational Enhancement Funding Corporation, Tobacco Settlement Revenue Bonds, Series 2013A, 3.539%, 6/01/22	No Opt. Call	A		1,906,660

Nuveen Investments

NBB	Nuveen Build America Bond Fund
	Portfolio of Investments (continued)
		March 31, 2014

	Principal		Optional Call
	Amount (000)	Description (1)	Provisions (2)	Ratings (3)		Value
		Tennessee – 3.5% (2.8% of Total Investments)
$	15,000	Metropolitan Government Nashville & Davidson County Convention Center Authority, Tennessee, Tourism Tax Revenue Bonds, Build America Taxable Bonds, Series 2010A-2, 7.431%, 7/01/43	No Opt. Call	A1	$	18,352,650
	1,040	Metropolitan Government Nashville & Davidson County Convention Center Authority, Tennessee, Tourism Tax Revenue Bonds, Build America Taxable Bonds, Subordinate Lien Series 2010B, 6.731%, 7/01/43	No Opt. Call	Aa3		1,242,623
	16,040	Total Tennessee				19,595,273
		Texas – 10.6% (8.8% of Total Investments)
	9,940	Dallas Convention Center Hotel Development Corporation, Texas, Hotel Revenue Bonds, Build America Taxable Bonds, Series 09B, 7.088%, 1/01/42	No Opt. Call	A+		11,812,696
	3,000	Houston, Texas, First Lien Combined Utility System Revenue Bonds, Refunding Series 2014B, 3.828%, 5/15/28	No Opt. Call	AA		3,063,420
	10,000	North Texas Tollway Authority, System Revenue Bonds, Subordinate Lien Taxable Revenue Bonds, Federally Taxable Build America Bonds, Series 2010-B2, 8.910%, 2/01/30	2/20 at 100.00	Baa3		11,667,200
	15,000	North Texas Tollway Authority, System Revenue Bonds, Taxable Build America Bond Series 2009B, 6.718%, 1/01/49	No Opt. Call	A2		19,917,900
	5,000	San Antonio, Texas, General Obligation Bonds, Build America Taxable Bonds, Series 2010B, 6.038%, 8/01/40	8/20 at 100.00	AAA		5,542,700
	7,015	Texas State, General Obligation Bonds, Transportation Commission, Build America Taxable Bonds, Series 2009A, 5.517%, 4/01/39	No Opt. Call	AAA		8,418,140
	49,955	Total Texas				60,422,056
		Utah – 0.9% (0.8% of Total Investments)
	4,000	Central Utah Water Conservancy District, Utah, Revenue Bonds, Federally Taxable Build America Bonds, Series 2010A, 5.700%, 10/01/40	4/20 at 100.00	AA+		4,285,760
	1,000	Tooele County Municipal Building Authority, Utah, Lease Revenue Bonds, Build America Bond Series 2010A-2, 8.000%, 12/15/32	12/20 at 100.00	A+		1,020,010
	5,000	Total Utah				5,305,770
		Virginia – 3.3% (2.7% of Total Investments)
	4,300	Metropolitan Washington Airports Authority, Virginia, Dulles Toll Road Second Senior Lien Revenue Bonds, Build America Bonds, Series 2009D, 7.462%, 10/01/46 – AGC Insured	No Opt. Call	BBB+		5,246,774
	10,000	Metropolitan Washington Airports Authority, Virginia, Dulles Toll Road Subordinate Lien Revenue Bonds, Dulles Metrorail Capital Improvement Project, Build America Taxable Bonds, Series 2010D, 8.000%, 10/01/47	No Opt. Call	BBB		11,877,200
	2,105	Tobacco Settlement Financing Corporation of Virginia, Tobacco Settlement Asset Backed Bonds, Refunding Senior Lien Series 2007A, 6.706%, 6/01/46	6/17 at 100.00	B–		1,479,691
	16,405	Total Virginia				18,603,665
		Washington – 1.1% (0.9% of Total Investments)
	4,000	Seattle, Washington, Municipal Light and Power Revenue Bonds, Federally Taxable Build America Bonds, Tender Option Bond Trust T0001, 24.844%, 2/01/40 (IF) (4)	No Opt. Call	AA		6,495,200
$	575,922	Total Long-Term Investments (cost $621,962,436)				686,299,567

Nuveen Investments

	Principal
	Amount (000)	Description (1)	Coupon	Maturity		Value
		SHORT-TERM INVESTMENTS – 0.2% (0.2% of Total Investments)
$	1,108	Repurchase Agreement with State Street Bank, dated 3/31/14, repurchase price $1,107,542, collateralized by $1,150,000 U.S. Treasury Notes, 0.625%, due 8/31/17, value $1,129,803	0.000%	4/01/14	$	1,107,542
		Total Short-Term Investments (cost $1,107,542)				1,107,542
		Total Investments (cost $623,069,978) – 121.1%				687,407,109
		Borrowings – (15.7)% (5), (6)				(89,000,000	)
		Floating Rate Obligations – (9.4)%				(53,090,000	)
		Other Assets Less Liabilities – 4.0% (8)				22,372,403
		Net Assets – 100%			$	567,689,512

Investments in Derivatives as of March 31, 2014

Interest Rate Swaps outstanding:

Counterparty

Notional

Amount

Fund

Pay/Receive

Floating Rate

Index

Fixed Rate

(Annualized)

Fixed Rate

Payment

Frequency

Effective

Date (7)

Termination

Date

Unrealized

Appreciation

(Depreciation) (8)

Barclays Bank PLC

60,500,000

Receive

1-Month USD-LIBOR

1.450

Monthly

10/01/14

10/01/18

663,512

Morgan Stanley

19,200,000

Receive

1-Month USD-LIBOR

2.064

Monthly

3/21/11

3/21/16

(615,620

)

Morgan Stanley

60,500,000

Receive

1-Month USD-LIBOR

1.764

Monthly

10/01/14

12/01/19

1,063,223

Morgan Stanley

135,000,000

Receive

3-Month USD-LIBOR

3.035

Semi-Annually

2/21/14

2/21/41

11,728,944

275,200,000

12,840,059

(1)	All percentages shown in the Portfolio of Investments are based on net assets unless otherwise noted.
(2)	Optional Call Provisions (not covered by the report of independent registered public accounting firm): Dates (month and year) and prices of the earliest optional call or redemption. There may be other call provisions at varying prices at later dates. Certain mortgage-backed securities may be subject to periodic principal paydowns.
(3)	Ratings (not covered by the report of independent registered public accounting firm): Using the highest of Standard & Poor’s Group (“Standard & Poor’s”), Moody’s Investors Service, Inc. (“Moody’s”) or Fitch, Inc. (“Fitch”) rating. Ratings below BBB by Standard & Poor’s, Baa by Moody’s or BBB by Fitch are considered to be below investment grade. Holdings designated N/R are not rated by any of these national rating agencies.
(4)	Investment, or portion of investment, has been pledged to collateralize the net payment obligations for investments in inverse floating rate transactions.
(5)	Borrowings as a percentage of Total Investments is 12.9%.
(6)	The Fund segregates 100% of its eligible investments in the Portfolio of Investments as collateral for Borrowings.
(7)	Effective date represents the date on which both the Fund and Counterparty commence interest payment accruals on each contract.
(8)	Other Assets Less Liabilities includes the Unrealized Appreciation (Depreciation) of derivative instruments as listed within Investments in Derivatives as of the end of the reporting period.
(IF)	Inverse floating rate investment.
(UB)	Underlying bond of an inverse floating rate trust reflected as a financing transaction. See Notes to Financial Statements, Note 3 – Portfolio Securities and Investments in Derivatives, Inverse Floating Rate Securities for more information.
USD-LIBOR	United States Dollar-London Inter-Bank Offered Rate.

See accompanying notes to financial statements.

Nuveen Investments

NBD
	Nuveen Build America Bond Opportunity Fund
	Portfolio of Investments
		March 31, 2014

	Principal		Optional Call
	Amount (000)	Description (1)	Provisions (2)	Ratings (3)		Value
		LONG-TERM INVESTMENTS 106.6% (99.8% of Total Investments)
		MUNICIPAL BONDS – 106.6% (99.8% of Total Investments)
		Alabama – 0.6% (0.5% of Total Investments)
$	1,000	Baptist Health Care Authority, Alabama, An Affiliate of UAB Health System, Taxable Bond Series 2013A, 5.500%, 11/15/43	No Opt. Call	A3	$	926,510
		California – 20.0% (18.8% of Total Investments)
	1,500	California State Public Works Board, Lease Revenue Bonds, Various Capital Projects, Build America Taxable Bond Series 2009G-2, 8.361%, 10/01/34	No Opt. Call	A2		1,895,625
	2,000	Los Angeles Community College District, Los Angeles County, California, General Obligation Bonds, Tender Option Bond Trust TN027, 30.501%, 8/01/49 (IF) (4)	No Opt. Call	Aa1		5,713,700
	3,000	Los Angeles County Public Works Financing Authority, California, Lease Revenue Bonds, Multiple Capital Projects I, Build America Taxable Bond Series 2010B, 7.618%, 8/01/40	No Opt. Call	AA		3,939,270
	2,650	Los Angeles Department of Airports, California, Revenue Bonds, Los Angeles International Airport, Build America Taxable Bonds, Series 2009C, 6.582%, 5/15/39	No Opt. Call	AA–		3,286,742
	2,000	Los Angeles Department of Water and Power, California, Water System Revenue Bonds, Tender Option Bond Trust T0003, 30.250%, 7/01/42 (IF) (4)	No Opt. Call	AA		5,529,300
	1,000	Oakland Redevelopment Agency, California, Subordinated Housing Set Aside Revenue Bonds, Federally Taxable Series 2011A-T, 7.500%, 9/01/19	No Opt. Call	A		1,141,350
	2,175	San Diego County Regional Transportation Commission, California, Sales Tax Revenue Bonds, Build America Taxable Bonds Series 2010A, 5.911%, 4/01/48	No Opt. Call	AAA		2,708,462
	675	San Francisco City and County Redevelopment Financing Authority, California, Taxable Tax Allocation Revenue Bonds, San Francisco Redevelopment Projects, Series 2009F, 8.406%, 8/01/39	No Opt. Call	A		805,390
	2,000	San Francisco City and County, California, Certificates of Participation, 525 Golden Gate Avenue, San Francisco Public Utilities Commission Office Project, Tender Option Bond Trust B001, 29.603%, 11/01/41 (IF)	No Opt. Call	AA		3,584,400
	315	Stanton Redevelopment Agency, California, Consolidated Project Tax Allocation Bonds, Series 2011A, 7.000%, 12/01/19	No Opt. Call	A–		351,616
	3,000	The Regents of the University of California, Medical Center Pooled Revenue Bonds, Build America Taxable Bonds, Series 2010H, 6.548%, 5/15/48	No Opt. Call	AA–		3,772,740
	20,315	Total California				32,728,595
		Colorado – 4.5% (4.3% of Total Investments)
	4,000	Colorado State Bridge Enterprise Revenue Bonds, Federally Taxable Build America Series 2010A, 6.078%, 12/01/40	No Opt. Call	AA		4,920,480
	2,000	Regional Transportation District, Colorado, Sales Tax Revenue Bonds, Fastracks Project, Build America Series 2010B, 5.844%, 11/01/50	No Opt. Call	AA+		2,507,640
	6,000	Total Colorado				7,428,120
		Connecticut – 0.7% (0.7% of Total Investments)
	1,000	Harbor Point Infrastructure Improvement District, Connecticut, Special Obligation Revenue Bonds, Harbor Point Project, Federally Taxable – Issuer Subsidy – Recovery Zone Economic Development Bond Series 2010B, 12.500%, 4/01/39	4/20 at 100.00	N/R		1,204,350
		District of Columbia – 0.6% (0.5% of Total Investments)
	800	District of Columbia, Income Tax Secured Revenue Bonds, Build America Taxable Bonds, Series 2009E, 5.591%, 12/01/34	No Opt. Call	AAA		920,816

Nuveen Investments

	Principal		Optional Call
	Amount (000)	Description (1)	Provisions (2)	Ratings (3)		Value
		Georgia – 3.7% (3.5% of Total Investments)
$	2,000	Georgia Municipal Electric Authority, Plant Vogtle Units 3 & 4 Project J Bonds, Taxable Build America Bonds Series 2010A, 6.637%, 4/01/57	No Opt. Call	A+	$	2,290,840
	3,000	Georgia Municipal Electric Authority, Plant Vogtle Units 3 & 4 Project P Bonds, Refunding Taxable Build America Bonds Series 2010A, 7.055%, 4/01/57	No Opt. Call	A–		3,270,540
	1,058	Liberty County Industrial Authority, Georgia, Revenue Bonds, Series 2011C, 1.000%, 7/01/18	7/14 at 100.00	N/R		549,410
	6,058	Total Georgia				6,110,790
		Illinois – 14.3% (13.4% of Total Investments)
	3,575	Chicago Transit Authority, Illinois, Sales Tax Receipts Revenue Bonds, Federally Taxable Build America Bonds, Series 2010B, 6.200%, 12/01/40	No Opt. Call	AA		3,988,914
	1,010	Chicago, Illinois, General Airport Revenue Bonds, O’Hare International Airport, Third Lien, Build America Taxable Bond Series 2010B, 6.845%, 1/01/38	1/20 at 100.00	A2		1,092,860
	5,160	Chicago, Illinois, Wastewater Transmission Revenue Bonds, Build America Taxable Bond Series 2010B, 6.900%, 1/01/40	No Opt. Call	AA		5,836,786
	4,000	Chicago, Illinois, Water Revenue Bonds, Taxable Second Lien Series 2010B, 6.742%, 11/01/40	No Opt. Call	AA		4,685,120
	245	Cook County, Illinois, General Obligation Bonds, Build America Taxable Bonds, Series 2010D, 6.229%, 11/15/34	No Opt. Call	AA		265,925
	255	Illinois Finance Authority, Revenue Bonds, Illinois Institute of Technology, Refunding Series 2006A, 6.100%, 4/01/15	4/14 at 100.00	Baa3		253,544
	2,000	Illinois State, General Obligation Bonds, Build America Taxable Bonds, Series 2010-5, 7.350%, 7/01/35	No Opt. Call	A–		2,336,280
	4,010	Illinois Toll Highway Authority, Toll Highway Revenue Bonds, Build America Taxable Bonds, Senior Lien Series 2009A, 6.184%, 1/01/34	No Opt. Call	AA–		4,872,310
	20,255	Total Illinois				23,331,739
		Indiana – 2.2% (2.1% of Total Investments)
	2,980	Indianapolis Local Public Improvement Bond Bank, Indiana, Build America Taxable Bonds, Series 2010B-2, 6.116%, 1/15/40	No Opt. Call	AA+		3,647,043
		Kentucky – 2.3% (2.1% of Total Investments)
	3,000	Louisville and Jefferson County Metropolitan Sewer District, Kentucky, Sewer and Drainage System Revenue Bonds, Build America Taxable Bonds Series 2010A, 6.250%, 5/15/43	No Opt. Call	AA		3,728,430
		Massachusetts – 2.4% (2.3% of Total Investments)
	2,000	Massachusetts, Transportation Fund Revenue Bonds, Accelerated Bridge Program, Tender Option Bond Trust T0004, 25.716%, 6/01/40 (IF) (4)	No Opt. Call	AAA		3,994,200
		Michigan – 4.3% (4.0% of Total Investments)
	500	Detroit City School District, Wayne County, Michigan, General Obligation Bonds, Build America Taxable Bond Series 2009B, 7.747%, 5/01/39	No Opt. Call	Aa2		527,765
	3,000	Detroit City School District, Wayne County, Michigan, General Obligation Bonds, Build America Taxable Bond Series 2010B, 6.845%, 5/01/40	5/20 at 100.00	Aa2		2,926,500
	2,090	Michigan Tobacco Settlement Finance Authority, Tobacco Settlement Asset-Backed Revenue Bonds, Taxable Turbo Series 2006A, 7.309%, 6/01/34	No Opt. Call	B2		1,673,902
	2,000	Wayne County Building Authority, Michigan, General Obligation Bonds, Jail Facilities, Federally Taxable Recovery Zone Economic Development Series 2010, 10.000%, 12/01/40	12/20 at 100.00	BBB–		1,936,400
	7,590	Total Michigan				7,064,567
		Mississippi – 1.4% (1.3% of Total Investments)
	2,085	Mississippi State, General Obligation Bonds, Build America Taxable Bond Series 2010F, 5.245%, 11/01/34	No Opt. Call	AA+		2,330,008
		Missouri – 0.2% (0.2% of Total Investments)
	250	Curators of the University of Missouri, System Facilities Revenue Bonds, Build America Taxable Bonds, Series 2009A, 5.960%, 11/01/39	No Opt. Call	AA+		304,903

Nuveen Investments

NBD	Nuveen Build America Bond Opportunity Fund
	Portfolio of Investments (continued)
		March 31, 2014

	Principal		Optional Call
	Amount (000)	Description (1)	Provisions (2)	Ratings (3)		Value
		Nevada – 3.2% (3.0% of Total Investments)
$	1,950	Clark County, Nevada, Airport Revenue Bonds, Senior Lien Series 2009B, 6.881%, 7/01/42	7/19 at 100.00	Aa2	$	2,141,373
	1,500	Clark County, Nevada, Airport Revenue Bonds, Taxable Direct Payment Build America Bond Series 2010C, 6.820%, 7/01/45	No Opt. Call	Aa2		1,980,270
	1,000	Las Vegas Valley Water District, Nevada, Limited Tax General Obligation Bonds, Build America Taxable Bonds, Series 2009C, 7.013%, 6/01/39	No Opt. Call	AA+		1,100,760
	4,450	Total Nevada				5,222,403
		New Jersey – 6.9% (6.5% of Total Investments)
	3,055	New Jersey Transportation Trust Fund Authority, Transportation System Bonds, Build America Bonds Issuer Subsidy Program, Series 2010C, 5.754%, 12/15/28	No Opt. Call	A+		3,500,969
	4,000	New Jersey Turnpike Authority, Revenue Bonds, Build America Taxable Bonds, Series 2010A, 7.102%, 1/01/41	No Opt. Call	A+		5,457,680
	2,000	Rutgers State University, New Jersey, Revenue Bonds, Build America Taxable Bond Series 2010H, 5.665%, 5/01/40	No Opt. Call	AA–		2,365,820
	9,055	Total New Jersey				11,324,469
		New York – 12.1% (11.3% of Total Investments)
	2,000	Dormitory Authority of the State of New York, State Personal Income Tax Revenue Bonds, Tender Option Bond Trust B004, 24.883%, 3/15/40 (IF)	No Opt. Call	AAA		3,701,300
	3,270	Metropolitan Transportation Authority, New York, Transportation Revenue Bonds, Federally Taxable Issuer Subsidy Build America Bonds, Series 2010A, 6.668%, 11/15/39	No Opt. Call	A+		4,197,633
	1,500	New York City Municipal Water Finance Authority, New York, Water and Sewer System Revenue Bonds, Second Generation Resolution, Build America Taxable Bonds, Fiscal 2011 Series AA, 5.440%, 6/15/43	No Opt. Call	AA+		1,705,170
	2,000	New York City Municipal Water Finance Authority, New York, Water and Sewer System Revenue Bonds, Second Generation Resolution, Taxable Tender Option Bonds Trust T30001-2, 27.039%, 6/15/44 (IF)	No Opt. Call	AA+		4,052,600
	3,500	New York City Transitional Finance Authority, New York, Building Aid Revenue Bonds, Build America Taxable Bond Fiscal 2011 Series 2010S-1B, 6.828%, 7/15/40	No Opt. Call	AA–		4,414,200
	1,500	New York City, New York, General Obligation Bonds, Federally Taxable Build America Bonds, Series 2010-F1, 6.646%, 12/01/31	12/20 at 100.00	AA		1,711,770
	13,770	Total New York				19,782,673
		North Carolina – 1.3% (1.2% of Total Investments)
	1,870	North Carolina Turnpike Authority, Triangle Expressway System State Annual Appropriation Revenue Bonds, Federally Taxable Issuer Subsidy Build America Bonds, Series 2009B, 6.700%, 1/01/39	1/19 at 100.00	AA		2,046,939
		Ohio – 4.2% (3.9% of Total Investments)
	3,000	American Municipal Power Inc., Ohio, Meldahl Hydroelectric Projects Revenue Bonds, Federally Taxable Build America Bonds, Series 2010B, 7.499%, 2/15/50	No Opt. Call	A		3,945,480
	2,650	Northeast Ohio Regional Sewer District, Wastewater Improvement Revenue Bonds, Build America Taxable Bonds, Series 2010, 6.038%, 11/15/40	11/20 at 100.00	AA+		2,875,489
	5,650	Total Ohio				6,820,969
		Pennsylvania – 1.8% (1.6% of Total Investments)
	2,500	Pennsylvania Turnpike Commission, Turnpike Revenue Bonds, Build America Taxable Bonds, Series 2010B, 5.511%, 12/01/45	No Opt. Call	A+		2,866,175
		South Carolina – 8.7% (8.2% of Total Investments)
	2,395	South Carolina Public Service Authority, Electric System Revenue Bonds, Santee Cooper, Federally Taxable Build America Series 2010C, 6.454%, 1/01/50	No Opt. Call	AA–		2,904,967
	205	South Carolina Public Service Authority, Electric System Revenue Bonds, Santee Cooper, Federally Taxable Build America Tender Option Bond Trust T30002, 30.070%, 1/01/50 (IF)	No Opt. Call	AA–		423,253

Nuveen Investments

	Principal		Optional Call
	Amount (000)	Description (1)	Provisions (2)	Ratings (3)		Value
		South Carolina (continued)
$	8,985	South Carolina Public Service Authority, Electric System Revenue Bonds, Santee Cooper, Federally Taxable Build America Series 2010C, 6.454%, 1/01/50 (UB)	No Opt. Call	AA–	$	10,898,176
	11,585	Total South Carolina				14,226,396
		South Dakota – 0.6% (0.5% of Total Investments)
	1,000	South Dakota Educational Enhancement Funding Corporation, Tobacco Settlement Revenue Bonds, Series 2013A, 3.539%, 6/01/22	No Opt. Call	A		953,330
		Tennessee – 3.0% (2.8% of Total Investments)
	4,060	Metropolitan Government Nashville & Davidson County Convention Center Authority, Tennessee, Tourism Tax Revenue Bonds, Build America Taxable Bonds, Subordinate Lien Series 2010B, 6.731%, 7/01/43	No Opt. Call	Aa3		4,851,010
		Texas – 4.1% (3.8% of Total Investments)
	2,000	Dallas Area Rapid Transit, Texas, Senior Lien Sales Tax Revenue Bonds, Build America Taxable Bonds, Series 2009B, 5.999%, 12/01/44	No Opt. Call	AA+		2,525,400
	2,000	Dallas Convention Center Hotel Development Corporation, Texas, Hotel Revenue Bonds, Build America Taxable Bonds, Series 09B, 7.088%, 1/01/42	No Opt. Call	A+		2,376,800
	1,500	North Texas Tollway Authority, System Revenue Bonds, Subordinate Lien Taxable Revenue Bonds, Federally Taxable Build America Bonds, Series 2010-B2, 8.910%, 2/01/30	2/20 at 100.00	Baa3		1,750,080
	5,500	Total Texas				6,652,280
		Virginia – 2.8% (2.6% of Total Investments)
	2,110	Metropolitan Washington Airports Authority, Virginia, Dulles Toll Road Second Senior Lien Revenue Bonds, Build America Bonds, Series 2009D, 7.462%, 10/01/46 – AGC Insured	No Opt. Call	BBB+		2,574,580
	2,915	Tobacco Settlement Financing Corporation of Virginia, Tobacco Settlement Asset Backed Bonds, Refunding Senior Lien Series 2007A, 6.706%, 6/01/46	6/17 at 100.00	B–		2,049,070
	5,025	Total Virginia				4,623,650
		Washington – 0.7% (0.7% of Total Investments)
	1,000	Washington State Convention Center Public Facilities District, Lodging Tax Revenue Bonds, Build America Taxable Bond Series 2010B, 6.790%, 7/01/40	No Opt. Call	Aa3		1,139,170
$	138,798	Total Long-Term Investments (cost $142,929,972)				174,229,535

	Principal
	Amount (000)	Description (1)	Coupon	Maturity		Value
		SHORT-TERM INVESTMENTS – 0.2% (0.2% of Total Investments)
$	327	Repurchase Agreement with State Street Bank, dated 3/31/14, repurchase price $327,446, collateralized by $340,000 U.S. Treasury Notes, 0.625%, due 8/31/17, value $334,029	0.000%	4/01/14	$	327,446
		Total Short-Term Investments (cost $327,446)				327,446
		Total Investments (cost $143,257,418) – 106.8%				174,556,981
		Borrowings – (7.0)% (5), (6)				(11,500,000	)
		Floating Rate Obligations – (4.4)%				(7,190,000	)
		Other Assets Less Liabilities – 4.6% (8)				7,523,668
		Net Assets – 100%			$	163,390,649

Nuveen Investments

NBD	Nuveen Build America Bond Opportunity Fund
	Portfolio of Investments (continued)
		March 31, 2014

Investments in Derivatives as of March 31, 2014

Interest Rate Swaps outstanding:

Counterparty

Notional

Amount

Fund

Pay/Receive

Floating Rate

Index

Fixed Rate

(Annualized)

Fixed Rate

Payment

Frequency

Effective

Date (7)

Termination

Date

Unrealized

Appreciation

(Depreciation) (8)

Barclays Bank PLC

11,200,000

Receive

1-Month USD-LIBOR

2.240

Monthly

12/17/10

12/17/15

(367,744

)

Barclays Bank PLC

14,750,000

Receive

1-Month USD-LIBOR

1.450

Monthly

10/01/14

10/01/18

161,765

Barclays Bank PLC

20,000,000

Receive

3-Month USD-LIBOR

3.280

Semi-Annually

2/19/15

2/19/42

1,472,238

Morgan Stanley

14,750,000

Receive

1-Month USD-LIBOR

1.875

Monthly

10/01/14

6/01/20

301,359

Morgan Stanley

18,000,000

Receive

3-Month USD-LIBOR

3.098

Semi-Annually

1/24/14

1/24/41

1,311,887

Morgan Stanley

15,000,000

Receive

3-Month USD-LIBOR

3.035

Semi-Annually

2/21/14

2/21/41

1,303,216

93,700,000

4,182,721

(1)	All percentages shown in the Portfolio of Investments are based on net assets unless otherwise noted.
(2)	Optional Call Provisions (not covered by the report of independent registered public accounting firm): Dates (month and year) and prices of the earliest optional call or redemption. There may be other call provisions at varying prices at later dates. Certain mortgage-backed securities may be subject to periodic principal paydowns.
(3)	Ratings (not covered by the report of independent registered public accounting firm): Using the highest of Standard & Poor’s Group (“Standard & Poor’s”), Moody’s Investors Service, Inc. (“Moody’s”) or Fitch, Inc. (“Fitch”) rating. Ratings below BBB by Standard & Poor’s, Baa by Moody’s or BBB by Fitch are considered to be below investment grade. Holdings designated N/R are not rated by any of these national rating agencies.
(4)	Investment, or portion of investment, has been pledged to collateralize the net payment obligations for investments in inverse floating rate transactions.
(5)	Borrowings as a percentage of Total Investments is 6.6%.
(6)	The Fund segregates 100% of its eligible investments in the Portfolio of Investments as collateral for Borrowings.
(7)	Effective date represents the date on which both the Fund and Counterparty commence interest payment accruals on each contract.
(8)	Other Assets Less Liabilities includes the Unrealized Appreciation (Depreciation) of derivative instruments as listed within Investments in Derivatives as of the end of the reporting period.
(IF)	Inverse floating rate investment.
(UB)	Underlying bond of an inverse floating rate trust reflected as a financing transaction. See Notes to Financial Statements, Note 3 – Portfolio Securities and Investments in Derivatives, Inverse Floating Rate Securities for more information.
USD-LIBOR	United States Dollar-London Inter-Bank Offered Rate.

See accompanying notes to financial statements.

Nuveen Investments

Statement of
	Assets and Liabilities	March 31, 2014

		Build America			Build America
		Bond			Bond Opportunity
		(NBB	)		(NBD	)
Assets
Long-term investments, at value (cost $621,962,436 and $142,929,972, respectively)	$	686,299,567		$	174,229,535
Short-term investments, at value (cost approximates value)		1,107,542			327,446
Unrealized appreciation on interest rate swaps, net		12,840,059			4,182,721
Receivable for:
Interest		12,956,940			3,508,352
Investments sold		240,000			811,085
Other assets		33,643			9,336
Total assets		713,477,751			183,068,475
Liabilities
Borrowings		89,000,000			11,500,000
Cash overdraft		8,826			8,825
Floating rate obligations		53,090,000			7,190,000
Payable for:
Dividends		2,977,527			778,031
Investments purchased		88,404			—
Accrued expenses:
Management fees		400,919			119,130
Interest on borrowings		68,231			8,817
Trustees fees		26,922			2,207
Other		127,410			70,816
Total liabilities		145,788,239			19,677,826
Net assets	$	567,689,512		$	163,390,649
Shares outstanding		26,461,985			7,205,250
Net asset value (“NAV”) per share outstanding	$	21.45		$	22.68
Net assets consist of:
Shares, $.01 par value per share	$	264,620		$	72,053
Paid-in surplus		504,137,904			137,235,389
Undistributed (Over-distribution of) net investment income		(954,458	)		11,680
Accumulated net realized gain (loss)		(12,935,744	)		(9,410,757	)
Net unrealized appreciation (depreciation)		77,177,190			35,482,284
Net assets	$	567,689,512		$	163,390,649
Authorized shares		Unlimited			Unlimited

See accompanying notes to financial statements.

Nuveen Investments

Statement of
	Operations	Year Ended March 31, 2014

		Build America			Build America
		Bond			Bond Opportunity
		(NBB	)		(NBD	)
Investment Income	$	43,141,289		$	11,841,341
Expenses
Management fees		4,690,757			1,390,859
Shareholder servicing agent fees and expenses		170			169
Interest expense		1,214,127			173,476
Custodian fees and expenses		96,711			37,003
Trustees fees and expenses		17,322			4,574
Professional fees		55,564			56,209
Shareholder reporting expenses		98,927			28,030
Stock exchange listing fees		8,585			8,585
Investor relations expenses		47,096			12,216
Other expenses		22,497			10,808
Total expenses		6,251,756			1,721,929
Net investment income (loss)		36,889,533			10,119,412
Realized and Unrealized Gain (Loss)
Net realized gain (loss) from:
Investments		2,655,764			759,391
Swaps		(555,048	)		(322,055	)
Change in net unrealized appreciation (depreciation) of:
Investments		(45,752,110	)		(14,880,533	)
Swaps		13,393,057			5,114,608
Net realized and unrealized gain (loss)		(30,258,337	)		(9,328,589	)
Net increase (decrease) in net assets from operations	$	6,631,196		$	790,823

See accompanying notes to financial statements.

Nuveen Investments

Statement of
	Changes in Net Assets

	Build America Bond (NBB)						Build America Bond Opportunity (NBD)
		Year			Year			Year			Year
		Ended			Ended			Ended			Ended
		3/31/14			3/31/13			3/31/14			3/31/13
Operations
Net investment income (loss)	$	36,889,533		$	35,813,258		$	10,119,412		$	9,669,257
Net realized gain (loss) from:
Investments		2,655,764			5,671,625			759,391			1,334,232
Swaps		(555,048	)		(537,486	)		(322,055	)		232,303
Change in net unrealized appreciation (depreciation) of:
Investments		(45,752,110	)		31,778,396			(14,880,533	)		10,699,578
Swaps		13,393,057			(5,779,996	)		5,114,608			(2,902,583	)
Net increase (decrease) in net assets from operations		6,631,196			66,945,797			790,823			19,032,787
Distributions to Shareholders
From net investment income		(37,054,718	)		(34,784,279	)		(9,730,690	)		(9,280,362	)
Decrease in net assets from distributions to shareholders		(37,054,718	)		(34,784,279	)		(9,730,690	)		(9,280,362	)
Net increase (decrease) in net assets		(30,423,522	)		32,161,518			(8,939,867	)		9,752,425
Net assets at the beginning of period		598,113,034			565,951,516			172,330,516			162,578,091
Net assets at the end of period	$	567,689,512		$	598,113,034		$	163,390,649		$	172,330,516
Undistributed (Over-distribution of) net investment income at the end of period	$	(954,458	)	$	(297,532	)	$	11,680		$	(62,087	)

See accompanying notes to financial statements.

Nuveen Investments

Statement of
	Cash Flows	Year Ended March 31, 2014

		Build America			Build America
		Bond			Bond Opportunity
		(NBB	)		(NBD	)
Cash Flows from Operating Activities:
Net Increase (Decrease) in Net Assets from Operations	$	6,631,196		$	790,823
Adjustments to reconcile the net increase (decrease) in net assets from operations to net cash provided by (used in) operating activities:
Purchases of investments		(39,673,455	)		(6,905,019	)
Proceeds from sales and maturities of investments		41,902,003			7,220,702
Proceeds from (Purchases of) short-term investments, net		(760,141	)		420,556
Proceeds from (Payments for) swap contracts, net		(555,048	)		(322,055	)
Amortization (Accretion) of premiums and discounts, net		747,784			(4,238	)
(Increase) Decrease in:
Receivable for interest		(86,258	)		(23,499	)
Receivable for investments sold		(240,000	)		(811,085	)
Other assets		5,423			(2,302	)
Increase (Decrease) in:
Payable for investments purchased		(1,207,565	)		—
Accrued management fees		(15,402	)		(4,488	)
Accrued interest on borrowings		(6,623	)		(859	)
Accrued Trustees fees		8,419			1,144
Accrued other expenses		(62,694	)		(12,432	)
Net realized (gain) loss from:
Investments		(2,655,764	)		(759,391	)
Swaps		555,048			322,055
Change in net unrealized (appreciation) depreciation of:
Investments		45,752,110			14,880,533
Swaps		(13,393,057	)		(5,114,608	)
Net cash provided by (used in) operating activities		36,945,976			9,675,837
Cash Flows from Financing Activities:
Increase in cash overdraft		8,826			8,825
Cash distributions paid to shareholders		(36,954,802	)		(9,684,662	)
Net cash provided by (used in) financing activities		(36,945,976	)		(9,675,837	)
Net Increase (Decrease) in Cash		—			—
Cash at the beginning of period		—			—
Cash at the end of Period	$	—		$	—

Supplemental Disclosure of Cash Flow Information

		Build America			Build America
		Bond			Bond Opportunity
		(NBB	)		(NBD	)
Cash paid for interest (excluding borrowing costs)	$	1,131,549		$	146,837

See accompanying notes to financial statements.

Nuveen Investments

THIS PAGE INTENTIONALLY LEFT BLANK

Nuveen Investments

Financial
	Highlights

Selected data for a share outstanding throughout each period:

			Investment Operations								Less Distributions
	Beginning NAV		Net Investment Income (Loss)		(a)	Net Realized/ Unrealized Gain (Loss)			Total		From Net Investment Income			From Accumulated Net Realized Gains		Total			Offering Costs			Ending NAV		Ending Market Value
Build America Bond (NBB)
Year Ended 3/31:
2014	$	22.60	$	1.39		$	(1.14	)	$	.25	$	(1.40	)	$	—	$	(1.40	)	$	—		$	21.45	$	19.62
2013		21.39		1.35			1.17			2.52		(1.31	)		—		(1.31	)		—			22.60		20.97
2012		18.86		1.36			2.57			3.93		(1.40	)		—		(1.40	)		—			21.39		20.18
2011(f)		19.10		1.19			(.22	)		.97		(1.17	)		—		(1.17	)		(.04	)		18.86		18.06

Build America Bond Opportunity (NBD)
Year Ended 3/31:
2014		23.92		1.40			(1.29	)		.11		(1.35	)		—		(1.35	)		—			22.68		20.50
2013		22.56		1.34			1.31			2.65		(1.29	)		—		(1.29	)		—			23.92		22.12
2012		19.43		1.45			3.17			4.62		(1.49	)		—		(1.49	)		—			22.56		20.97
2011(g)		19.10		.47			.28			.75		(.38	)		—		(.38	)		(.04	)		19.43		18.63

	Borrowings at the End of Period
	Aggregate Amount Outstanding (000)		Asset Coverage Per $1,000
Build America Bond (NBB)
Year Ended 3/31:
2014	$	89,000	$	7,379
2013		89,000		7,720
2012		44,000		13,863
2011(f)		44,000		12,341

Build America Bond Opportunity (NBD)
Year Ended 3/31:
2014		11,500		15,208
2013		11,500		15,985
2012		—		—
2011(g)		—		—

Nuveen Investments

					Ratios/Supplemental Data
Total Returns							Ratios to Average Net Assets (c)
Based on NAV	(b)	Based on Market Value		(b)	Ending Net Assets (000)		Expenses		(d)	Net Investment Income (Loss)			Portfolio Turnover Rate		(e)


1.44	%		.63	%	$	567,690		1.12	%		6.63	%		6	%
12.05			10.57			598,113		1.10			6.10			7
21.29			19.92			565,952		1.05			6.63			18
4.90			(3.99	)		499,020		1.11	*		6.70	*		100


.76			(.85	)		163,391		1.08			6.34			4
11.97			11.88			172,331		1.07			5.74			4
24.34			21.00			162,578		.97			6.74			7
3.73			(4.96	)		139,972		.87	*		6.90	*		77

(a)	Per share Net Investment Income (Loss) is calculated using the average daily shares method.
(b)	Total Return Based on Market Value is the combination of changes in the market price per share and the effect of reinvested dividend income and reinvested capital gains distributions, if any, at the average price paid per share at the time of reinvestment. The last dividend declared in the period, which is typically paid on the first business day of the following month, is assumed to be reinvested at the ending market price. The actual reinvestment for the last dividend declared in the period may take place over several days, and in some instances may not be based on the market price, so the actual reinvestment price may be different from the price used in the calculation. Total returns are not annualized.

	Total Return Based on NAV is the combination of changes in NAV, reinvested dividend income at NAV and reinvested capital gains distributions at NAV, if any. The last dividend declared in the period, which is typically paid on the first business day of the following month, is assumed to be reinvested at the ending NAV. The actual reinvest price for the last dividend declared in the period may often be based on the Fund’s market price (and not its NAV), and therefore may be different from the price used in the calculation. Total returns are not annualized.
(c)	Net Investment Income (Loss) ratios reflect income earned and expenses incurred on assets attributable to borrowings, where applicable.
(d)	The expense ratios reflect, among other things, the interest expense deemed to have been paid by the Fund on the floating rate certificates issued by the special purpose trusts for the self-deposited inverse floaters held by the Fund, and/or all interest expense paid and other costs related to borrowings, where applicable, as described in Note 3 – Portfolio Securities and Investments in Derivatives, Inverse Floating Rate Securities and in Note 8 – Borrowing Arrangements, respectively, as follows:

Build America Bond (NBB)
Year Ended 3/31:
2014	.22	%
2013	.22
2012	.18
2011(f)	.24	*

Build America Bond Opportunity (NBD)
Year Ended 3/31:
2014	.11	%
2013	.10
2012	.03
2011(g)	.03	*

(e)	Portfolio Turnover Rate is calculated based on the lesser of long-term purchases or sales (as disclosed in Note 5 – Investment Transactions) divided by the average long-term market value during the period.
(f)	For the period April 27, 2010 (commencement of operations) through March 31, 2011.
(g)	For the period November 23, 2010 (commencement of operations) through March 31, 2011.
*	Annualized.

See accompanying notes to financial statements.

Nuveen Investments

Notes to
	Financial Statements

1. General Information and Significant Accounting Policies

General Information

Fund Information

The funds covered in this report and their corresponding New York Stock Exchange (“NYSE”) symbols are as follows (each a “Fund” and collectively, the “Funds”):

•	Nuveen Build America Bond Fund (NBB) (“Build America Bond (NBB)”)
•	Nuveen Build America Bond Opportunity Fund (NBD) (“Build America Bond Opportunity (NBD)”)

The Funds are registered under the Investment Company Act of 1940, as amended, as diversified closed-end registered investment companies. Build America Bond (NBB) and Build America Bond Opportunity (NBD) were organized as Massachusetts business trusts on December 4, 2009 and June 4, 2010, respectively.

Investment Adviser

The Funds’ investment adviser is Nuveen Fund Advisors, LLC (the “Adviser”), a wholly-owned subsidiary of Nuveen Investments, Inc. (“Nuveen”). The Adviser is responsible for each Fund’s overall investment strategy and asset allocation decisions. The Adviser has entered into sub-advisory agreements with Nuveen Asset Management, LLC (the “Sub-Adviser”), a subsidiary of the Adviser, under which the Sub-Adviser manages the investment portfolios of the Funds.

Investment Objectives

Each Fund’s primary investment objective is to provide current income through investments in taxable municipal securities. Each Fund’s secondary investment objective is to seek enhanced portfolio value and total return. The Funds seek to achieve their investment objectives by investing primarily in a diversified portfolio of taxable municipal securities known as Build America Bonds (“BABs”), which make up approximately 80% of their managed assets (as defined in Note 7 – Management Fees and Other Transactions with Affiliates). BABs are taxable municipal securities that include bonds issued by state and local governments to finance capital projects such as public schools, roads, transportation infrastructure, bridges, ports and public buildings, among others, pursuant to the American Recovery and Reinvestment Act of 2009, which offer municipal issuers a federal subsidy equal to 32% of a bond’s interest payments. Under normal circumstances, the Funds may invest 20% of their managed assets in securities other than BABs, including taxable and tax-exempt municipal securities, U.S. Treasury and other U.S. government agency securities. At least 80% of each Fund’s managed assets will be invested in securities that are investment grade quality at the time of purchase, as rated by at least one independent rating agency or judged to be of comparable quality by the Sub-Adviser. In addition, each Fund will use an integrated leverage and hedging strategy that the Fund has the potential to enhance income and risk-adjusted total return over time. Each Fund may employ leverage instruments such as bank borrowings, including loans from certain financial institutions, and portfolio investments that have the economic effect of leverage, including investments in inverse floating rate securities. Each Fund’s overall goal is to outperform over time the Barclays Build America Bond Index, an unleveraged index representing the BABs market, while maintaining a comparable overall level of interest rate risk.

The BAB program expired on December 31, 2010, and was not renewed. Build America Bond (NBB) and Build American Bond Opportunity (NBD) each have contingent term provisions stating that if there are no new issuances of BABs or similar U.S. Treasury-subsidized taxable municipal bonds for any twenty-four month period ending on or before December 31, 2014, Build America Bond (NBB) and Build American Bond Opportunity (NBD) will terminate on or around June 30, 2020, and December 31, 2020, respectively. Since there has been no new issuance of BABs for a twenty-four month period, the Funds are currently being managed in line with these termination dates and the distribution of each Fund’s assets to shareholders is planned for those times.

Significant Accounting Policies

The following is a summary of significant accounting policies followed by the Funds in the preparation of their financial statements in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”).

Investment Transactions

Investment transactions are recorded on a trade date basis. Realized gains and losses from investment transactions are determined on the specific identification method, which is the same basis used for federal income tax purposes. Investments purchased on a when-issued/delayed delivery basis may have extended settlement periods. Any investments so purchased are subject to market fluctuation during this period. The Funds have instructed the custodian to earmark securities in the Funds’ portfolios with a current value at least equal to the amount of the when-issued/delayed delivery purchase commitments. As of March 31, 2014, there were no such outstanding purchase commitments in either of the Funds.

Nuveen Investments

Investment Income

Investment income, which reflects the amortization of premiums and includes accretion of discounts for financial reporting purposes, is recorded on an accrual basis. Investment income also reflects paydown gains and losses, if any.

Professional Fees

Professional fees presented on the Statement of Operations consist of legal fees incurred in the normal course of operations, audit fees, tax consulting fees and, in some cases, workout expenditures. Workout expenditures are incurred in an attempt to protect or enhance an investment, or to pursue other claims or legal actions on behalf of Fund shareholders. If a refund is received for workout expenditures paid in a prior reporting period, such amounts will be recognized as “Legal fee refund” on the Statement of Operations.

Dividends and Distributions to Shareholders

Dividends to shareholders are declared monthly. Net realized capital gains from investment transactions, if any, are distributed to shareholders at least annually. Furthermore, capital gains are distributed only to the extent they exceed available capital loss carryforwards.

Distributions to shareholders are recorded on the ex-dividend date. The amount and timing of distributions are determined in accordance with federal income tax regulations, which may differ from U.S. GAAP.

Indemnifications

Under the Funds’ organizational documents, their officers and trustees are indemnified against certain liabilities arising out of the performance of their duties to the Funds. In addition, in the normal course of business, the Funds enter into contracts that provide general indemnifications to other parties. The Funds’ maximum exposure under these arrangements is unknown as this would involve future claims that may be made against the Funds that have not yet occurred. However, the Funds have not had prior claims or losses pursuant to these contracts and expect the risk of loss to be remote.

Netting Agreements

In the ordinary course of business, the Funds have entered into transactions subject to enforceable master repurchase agreements, International Swaps and Derivative Association, Inc. (“ISDA”) master agreements or other similar arrangements (“netting agreements”). Generally, the right to offset in netting agreements allows each Fund to offset any exposure to a specific counterparty with any collateral received or delivered to that counterparty based on the terms of the agreements. Generally, a Fund manages its cash collateral and securities collateral on a counterparty basis.

As of March 31, 2014, the Funds were invested in repurchase agreements and swap contracts that are subject to netting agreements and further described in Note 3 – Portfolio Securities and Investments in Derivatives.

Use of Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of increases and decreases in net assets from operations during the reporting period. Actual results may differ from those estimates.

2. Investment Valuation and Fair Value Measurements

The fair valuation input levels as described below are for fair value measurement purposes.

Investment Valuation

Prices of municipal bonds and swap contracts are provided by a pricing service approved by the Funds’ Board of Trustees. These securities are generally classified as Level 2. The pricing service establishes a security’s fair value using methods that may include consideration of the following: yields or prices of investments of comparable quality, type of issue, coupon, maturity and rating, market quotes or indications of value from security dealers, evaluations of anticipated cash flows or collateral, general market conditions and other information and analysis, including the obligor’s credit characteristics considered relevant. In pricing certain securities, particularly less liquid and lower quality securities, the pricing service may consider information about a security, its issuer or market activity provided by the Adviser. These securities are generally classified as Level 2 or Level 3 depending on the priority of the significant inputs.

Certain securities may not be able to be priced by the pre-established pricing methods as described above. Such securities may be valued by the Funds’ Board of Trustees or its designee at fair value. These securities generally include, but are not limited to, restricted securities (securities which may not be publicly sold without registration under the Securities Act of 1933, as amended) for which a pricing service is unable to provide a market price; securities whose trading has been formally suspended; debt securities that have gone into default and for which there is no current market quotation; a security whose market price is not available from a pre-established pricing source; a security with respect to which an event has occurred that is likely to materially affect the value of the security after the market has closed but before the calculation of a Fund’s net asset value (“NAV”) (as may be the case in non-U.S. markets on which the security is primarily traded) or make it difficult or impossible to obtain a reliable market quotation; and a security whose price, as provided by the pricing service, is not deemed to reflect the security’s fair value. As a general principle, the fair value of a security would appear to be the amount that the owner might reasonably expect to receive for it in a current sale. A variety of factors may be considered in determining the fair value of such securities, which may include consideration of the following: yields or prices of investments of

Nuveen Investments

Notes to Financial Statements (continued)

comparable quality, type of issue, coupon, maturity and rating, market quotes or indications of value from securities dealers, evaluations of anticipated cash flows or collateral, general market conditions and other information and analysis, including the obligor’s credit characteristics considered relevant. These securities are generally classified as Level 2 or Level 3 depending on the priority of the significant inputs. Regardless of the method employed to value a particular security, all valuations are subject to review by the Funds’ Board of Trustees or its designee.

Repurchase agreements are valued at contract amount plus accrued interest, which approximates market value. These securities are generally classified as Level 2.

Fair Value Measurements

Fair value is defined as the price that the Funds would receive upon selling an investment or transferring a liability in an orderly transaction to an independent buyer in the principal or most advantageous market for the investment. A three-tier hierarchy is used to maximize the use of observable market data and minimize the use of unobservable inputs and to establish classification of fair value measurements for disclosure purposes. Observable inputs reflect the assumptions market participants would use in pricing the asset or liability. Observable inputs are based on market data obtained from sources independent of the reporting entity. Unobservable inputs reflect the reporting entity’s own assumptions about the assumptions market participants would use in pricing the asset or liability. Unobservable inputs are based on the best information available in the circumstances. The following is a summary of the three-tiered hierarchy of valuation input levels.

Level 1 –	Inputs are unadjusted and prices are determined using quoted prices in active markets for identical securities.

Level 2 –	Prices are determined using other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.).

Level 3 –	Prices are determined using significant unobservable inputs (including management’s assumptions in determining the fair value of investments).

The inputs or methodologies used for valuing securities are not an indication of the risks associated with investing in those securities. The following is a summary of each Fund’s fair value measurements as of the end of the reporting period:

Build America Bond (NBB)		Level 1		Level 2		Level 3		Total
Long-Term Investments*:
Municipal Bonds	$	—	$	686,299,567	$	—	$	686,299,567
Short-Term Investments:
Repurchase Agreements		—		1,107,542		—		1,107,542
Investments in Derivatives:
Interest Rate Swaps**		—		12,840,059		—		12,840,059
Total	$	—	$	700,247,168	$	—	$	700,247,168

Build America Bond Opportunity (NBD)
Long-Term Investments*:
Municipal Bonds	$	—	$	174,229,535	$	—	$	174,229,535
Short-Term Investments:
Repurchase Agreements		—		327,446		—		327,446
Investments in Derivatives:
Interest Rate Swaps**		—		4,182,721		—		4,182,721
Total	$	—	$	178,739,702	$	—	$	178,739,702

*	Refer to the Fund’s Portfolio of Investments for state classifications.
**	Represents net unrealized appreciation (depreciation) as reported in the Fund’s Portfolio of Investments.

The Nuveen funds’ Board of Directors/Trustees is responsible for the valuation process and has delegated the oversight of the daily valuation process to the Adviser’s Valuation Committee. The Valuation Committee, pursuant to the valuation policies and procedures adopted by the Board of Directors/Trustees, is responsible for making fair value determinations, evaluating the effectiveness of the funds’ pricing policies and reporting to the Board of Directors/Trustees. The Valuation Committee is aided in its efforts by the Adviser’s dedicated Securities Valuation Team, which is responsible for administering the daily valuation process and applying fair value methodologies as approved by the Valuation Committee. When determining the reliability of independent pricing services for investments owned by the funds, the Valuation Committee, among other things, conducts due diligence reviews of the pricing services and monitors the quality of security prices received through various testing reports conducted by the Securities Valuation Team.

The Valuation Committee will consider pricing methodologies it deems relevant and appropriate when making a fair value determination, based on the facts and circumstances specific to the portfolio instrument. Fair value determinations generally will be derived as follows, using public or private market information:

(i)

If available, fair value determinations shall be derived by extrapolating from recent transactions or quoted prices for identical or comparable securities.

Nuveen Investments

(ii)

If such information is not available, an analytical valuation methodology may be used based on other available information including, but not limited to: analyst appraisals, research reports, corporate action information, issuer financial statements and shelf registration statements. Such analytical valuation methodologies may include, but are not limited to: multiple of earnings, discount from market value of a similar freely-traded security, discounted cash flow analysis, book value or a multiple thereof, risk premium/yield analysis, yield to maturity and/or fundamental investment analysis.

The purchase price of a portfolio instrument will be used to fair value the instrument only if no other valuation methodology is available or deemed appropriate, and it is determined that the purchase price fairly reflects the instrument’s current value.

For each portfolio security that has been fair valued pursuant to the policies adopted by the Board of Directors/Trustees, the fair value price is compared against the last available and next available market quotations. The Valuation Committee reviews the results of such testing and fair valuation occurrences are reported to the Board of Directors/Trustees.

3. Portfolio Securities and Investments in Derivatives

Portfolio Securities

Inverse Floating Rate Securities

Each Fund is authorized to invest in inverse floating rate securities. An inverse floating rate security is created by depositing a municipal bond, typically with a fixed interest rate, into a special purpose trust created by a broker-dealer. In turn, this trust (a) issues floating rate certificates, in face amounts equal to some fraction of the deposited bond’s par amount or market value, that typically pay short-term tax-exempt interest rates to third parties, and (b) issues to a long-term investor (such as one of the Funds) an inverse floating rate certificate (sometimes referred to as an “inverse floater”) that represents all remaining or residual interest in the trust. The income received by the inverse floater holder varies inversely with the short-term rate paid to the floating rate certificates’ holders, and in most circumstances the inverse floater holder bears substantially all of the underlying bond’s downside investment risk and also benefits disproportionately from any potential appreciation of the underlying bond’s value. The price of an inverse floating rate security will be more volatile than that of the underlying bond because the interest rate is dependent on not only the fixed coupon rate of the underlying bond but also on the short-term interest paid on the floating rate certificates, and because the inverse floating rate security essentially bears the risk of loss of the greater face value of the underlying bond.

The inverse floater held by a Fund gives the Fund the right (a) to cause the holders of the floating rate certificates to tender their notes at par, and (b) to have the broker transfer the fixed-rate bond held by the trust to the Fund, thereby collapsing the trust.

A Fund may purchase an inverse floating rate security in a secondary market transaction without first owning the underlying bond (referred to as an “externally-deposited inverse floater”), or instead by first selling a fixed-rate bond to a broker-dealer for deposit into the special purpose trust and receiving in turn the residual interest in the trust (referred to as a “self-deposited inverse floater”).

An investment in an externally-deposited inverse floater is identified in the Portfolio of Investments as “(IF) – Inverse floating rate investment.” The Fund’s Statement of Assets and Liabilities shows only the inverse floaters and not the underlying bonds as an asset, and does not reflect the short-term floating rate certificates as liabilities. Also, the Fund reflects in “Investment Income” only the net amount of earnings on its inverse floater investment (net of the interest paid to the holders of the short-term floating rate certificates and the expenses of the trust), and does not show the amount of that interest paid as an interest expense on the Statement of Operations.

An investment in a self-deposited inverse floater is accounted for as a financing transaction. In such instances, a fixed-rate bond deposited into a special purpose trust is identified in the Portfolio of Investments as “(UB) – Underlying bond of an inverse floating rate trust reflected as a financing transaction,” with the Fund accounting for the short-term floating rate certificates issued by the trust, at their liquidation value, as “Floating rate obligations” on the Statement of Assets and Liabilities. In addition, the Fund reflects in “Investment Income” the entire earnings of the underlying bond and recognizes the related interest paid to the holders of the short-term floating rate certificates as a component of “Interest expense” on the Statement of Operations.

The average floating rate obligations outstanding and average annual interest rate and fees related to self-deposited inverse floaters during the fiscal year ended March 31, 2014, were as follows:

		Build			Build America
		America			Bond
		Bond			Opportunity
		(NBB	)		(NBD	)
Average floating rate obligations outstanding	$	53,090,000		$	7,190,000
Average annual interest rate and fees		0.56	%		0.55	%

Nuveen Investments

Notes to Financial Statements (continued)

As of March 31, 2014, the total amount of floating rate obligations issued by each Fund’s self-deposited inverse floaters and externally-deposited inverse floaters was as follows:

		Build			Build America
		America			Bond
		Bond			Opportunity
		(NBB	)		(NBD	)
Floating rate obligations: self-deposited inverse floaters	$	53,090,000		$	7,190,000
Floating rate obligations: externally-deposited inverse floaters		91,190,000			48,810,000
Total	$	144,280,000		$	56,000,000

Each Fund may also enter into shortfall and forbearance agreements (sometimes referred to as a “recourse trust” or “credit recovery swap”) (such agreements referred to herein as “Recourse Trusts”) with a broker-dealer by which a Fund agrees to reimburse the broker-dealer, in certain circumstances, for the difference between the liquidation value of the fixed-rate bond held by the trust and the liquidation value of the floating rate certificates issued by the trust plus any shortfalls in interest cash flows. Under these agreements, a Fund’s potential exposure to losses related to or on inverse floaters may increase beyond the value of a Fund’s inverse floater investments as a Fund may potentially be liable to fulfill all amounts owed to holders of the floating rate certificates. At period end, any such shortfall is recognized as “Unrealized depreciation on Recourse Trusts” on the Statement of Assets and Liabilities.

As of March 31, 2014, each Fund’s maximum exposure to the floating rate obligations issued by externally-deposited Recourse Trusts was as follows:

		Build			Build America
		America			Bond
		Bond			Opportunity
		(NBB	)		(NBD	)
Maximum exposure to Recourse Trusts	$	91,190,000		$	40,810,000

Repurchase Agreements

In connection with transactions in repurchase agreements, it is each Fund’s policy that its custodian take possession of the underlying collateral securities, the fair value of which exceeds the principal amount of the repurchase transaction, including accrued interest, at all times. If the counterparty defaults, and the fair value of the collateral declines, realization of the collateral may be delayed or limited.

The following table presents the repurchase agreements for the Funds that are subject to netting agreements as of the end of the reporting period, and the collateral delivered related to those repurchase agreements.

Fund	Counterparty		Short-Term Investments, at Value		Collateral Pledged (From) Counterparty		*	Net Exposure
Build America Bond (NBB)		State Street Bank	$	1,107,542	$	(1,107,542	)	$	—
Build America Bond Opportunity (NBD)		State Street Bank		327,446		(327,446	)		—

*	As of March 31, 2014, the value of the collateral pledged from the counterparty exceeded the value of the repurchase agreements. Refer to the Fund’s Portfolio of Investments for details on the repurchase agreements.

Zero Coupon Securities

A zero coupon security does not pay a regular interest coupon to its holders during the life of the security. Income to the holder of the security comes from accretion of the difference between the original purchase price of the security at issuance and the par value of the security at maturity and is effectively paid at maturity. The market prices of zero coupon securities generally are more volatile than the market prices of securities that pay interest periodically.

Investments in Derivatives

Each Fund is authorized to invest in certain derivative instruments such as futures, options and swap contracts. Each Fund limits its investments in futures, options on futures and swap contracts to the extent necessary for the Adviser to claim the exclusion from registration by the Commodity Futures Trading Commission as a commodity pool operator with respect to the Fund. The Funds record derivative instruments at fair value with changes in fair value recognized on the Statement of Operations, when applicable. Even though the Funds’ investments in derivatives may represent economic hedges, they are not considered to be hedge transactions for financial reporting purposes.

Nuveen Investments

Swap Contracts

Interest rate swap contracts involve a Fund’s agreement with the counterparty to pay or receive a fixed rate payment in exchange for the counterparty receiving or paying a variable rate payment. Forward interest rate swap transactions involve a Fund’s agreement with a counterparty to pay or receive, in the future, a fixed or variable rate payment in exchange for the counterparty receiving or paying the Fund a variable or fixed rate payment, the accruals for which would begin at a specified date in the future (the “effective date”). The amount of the payment obligation is based on the notional amount of the swap contract and the termination date of the swap (which is akin to a bond’s maturity). Swap contracts do not involve the delivery of securities or other underlying assets or principal. Accordingly, the risk of loss with respect to the swap counterparty on such transactions is limited to the net amount of interest payments that each Fund is to receive. Swap contracts are valued daily. Upon entering into an interest rate swap contract (and beginning on the effective date for a forward interest rate swap contract), a Fund accrues the fixed rate payment expected to be paid or received and the variable rate payment expected to be received or paid on a daily basis, and recognizes the daily change in the fair value of the Fund’s contractual rights and obligations under the contracts. The net amount recorded for these transactions for each counterparty is recognized on the Statement of Assets and Liabilities as a component of “Unrealized appreciation or depreciation on interest rate swaps (,net)” with the change during the fiscal period recognized on the Statement of Operations as a component of “Change in net unrealized appreciation (depreciation) of swaps.” Income received or paid by a Fund is recognized as a component of “Net realized gain (loss) from swaps” on the Statement of Operations, in addition to the net realized gains or losses recognized upon the termination of a swap contract and are equal to the difference between a Fund’s basis in the swap and the proceeds from (or cost of) the closing transaction. Payments received or made at the beginning of the measurement period are recognized as a component of “Interest rate swap premiums paid and/or received” on the Statement of Assets and Liabilities, when applicable. For tax purposes, periodic payments are treated as ordinary income or expense.

During the fiscal year ended March 31, 2014, each Fund used swap contracts to reduce the duration of its bond portfolio as well as to fix its interest cost of leverage.

The average notional amount of interest rate swap contracts outstanding during the fiscal year ended March 31, 2014, was as follows:

		Build			Build America
		America			Bond
		Bond			Opportunity
		(NBB	)		(NBD	)
Average notional amount of interest rate swap contracts outstanding*	$	290,560,000		$	100,420,000

*	The average notional amount is calculated based on the outstanding notional at the beginning of the fiscal year and at the end of each fiscal quarter within the current fiscal year.

The following table presents the fair value of all swap contracts held by the Funds as of March 31, 2014, the location of these instruments on the Statement of Assets and Liabilities and the primary underlying risk exposure.

		Location on the Statement of Assets and Liabilities
		Asset Derivatives				(Liability) Derivatives
Underlying Risk Exposure	Derivative Instrument	Location		Value		Location		Value
Build America Bond (NBB)
		Unrealized appreciation on interest
Interest rate	Swaps	rate swaps, net	$	13,455,679		—	$	—
		Unrealized appreciation on interest
Interest rate	Swaps	rate swaps, net		(615,620	)	—		—
Total			$	12,840,059			$	—
Build America Bond Opportunity (NBD)
		Unrealized appreciation on interest
Interest rate	Swaps	rate swaps, net	$	4,550,465		—	$	—
		Unrealized appreciation on interest
Interest rate	Swaps	rate swaps, net		(367,744	)	—		—
Total			$	4,182,721			$	—

Nuveen Investments

Notes to Financial Statements (continued)

The following table presents each Fund’s swap contracts subject to netting agreements and collateral delivered related to those swap contracts.

Fund		Counterparty	Gross Unrealized Appreciation on Interest Rate Swaps*		Gross Unrealized (Depreciation) on Interest Rate Swaps*			Amounts Netted on Statement of Assets and Liabilities			Net Unrealized Appreciation (Depreciation) on Interest Rate Swaps		Collateral Pledged to (from) Counterparty			Net Exposure
Build America Bond (NBB)
	Barclays Bank PLC		$	663,512	$	—		$	—		$	663,512	$	(511,739	)	$	151,773
		Morgan Stanley		12,792,167		(615,620	)		(615,620	)		12,176,547		(10,824,586	)		1,351,961
Total			$	13,455,679	$	(615,620	)	$	(615,620	)	$	12,840,059	$	(11,336,325	)	$	1,503,734

Build America Bond Opportunity (NBD)

	Barclays Bank PLC		$	1,634,003	$	(367,744	)	$	(367,744	)	$	1,266,259	$	(1,260,051	)	$	6,208
		Morgan Stanley		2,916,462		—			—			2,916,462		(2,583,709	)		332,753
Total			$	4,550,465	$	(367,744	)	$	(367,744	)	$	4,182,721	$	(3,843,760	)	$	338,961

*	Represents gross unrealized appreciation (depreciation) for the counterparty as reported in the Fund’s Portfolio of Investments.

The following table presents the amount of net realized gain (loss) and change in net unrealized appreciation (deprecation) recognized on swap contracts on the Statement of Operations during the fiscal year ended March 31, 2014, and the primary underlying risk exposure.

	Underlying	Derivative		Net Realized Gain (Loss	)	Change in Net Unrealized Appreciation (Depreciation		)
Fund	Risk Exposure	Instrument		from Swaps			of Swaps
Build America Bond (NBB)	Interest rate	Swaps	$	(555,048	)	$	13,393,057
Build America Bond Opportunity (NBD)	Interest rate	Swaps		(322,055	)		5,114,608

Market and Counterparty Credit Risk

In the normal course of business each Fund may invest in financial instruments and enter into financial transactions where risk of potential loss exists due to changes in the market (market risk) or failure of the other party to the transaction to perform (counterparty credit risk). The potential loss could exceed the value of the financial assets recorded on the financial statements. Financial assets, which potentially expose each Fund to counterparty credit risk, consist principally of cash due from counterparties on forward, option and swap transactions, when applicable. The extent of each Fund’s exposure to counterparty credit risk in respect to these financial assets approximates their carrying value as recorded on the Statement of Assets and Liabilities.

Each Fund helps manage counterparty credit risk by entering into agreements only with counterparties the Adviser believes have the financial resources to honor their obligations and by having the Adviser monitor the financial stability of the counterparties. Additionally, counterparties may be required to pledge collateral daily (based on the daily valuation of the financial asset) on behalf of each Fund with a value approximately equal to the amount of any unrealized gain above a pre-determined threshold. Reciprocally, when each Fund has an unrealized loss, the Funds have instructed the custodian to pledge assets of the Funds as collateral with a value approximately equal to the amount of the unrealized loss above a pre-determined threshold. Collateral pledges are monitored and subsequently adjusted if and when the valuations fluctuate, either up or down, by at least the pre-determined threshold amount.

4. Fund Shares

The Funds have not repurchased any of their outstanding shares since the inception of the Funds’ repurchase programs.

Transactions in shares were as follows:

Build

America

Bond

(NBB)

Build America

Bond

Opportunity

(NBD)

Year

Ended

3/31/14

3/31/13

3/31/14

3/31/13

Shares issued to shareholders due to reinvestment of distributions

—

Nuveen Investments

5. Investment Transactions

Purchases and sales (including maturities but excluding short-term investments and derivative transactions) during the fiscal year ended March 31, 2014, were as follows:


		Build			Build America
		America			Bond
		Bond			Opportunity
		(NBB	)		(NBD	)
Purchases	$	39,673,455		$	6,905,019
Sales and maturities		41,902,003			7,220,702

6. Income Tax Information

Each Fund is a separate taxpayer for federal income tax purposes. Each Fund intends to distribute substantially all of its net investment income and net capital gains to shareholders and to otherwise comply with the requirements of Subchapter M of the Internal Revenue Code applicable to regulated investment companies. Therefore, no federal income tax provision is required.

For all open tax years and all major taxing jurisdictions, management of the Funds has concluded that there are no significant uncertain tax positions that would require recognition in the financial statements. Open tax years are those that are open for examination by taxing authorities (i.e., generally the last four tax year ends and the interim tax period since then). Furthermore, management of the Funds is also not aware of any tax positions for which it is reasonably possible that the total amounts of unrecognized tax benefits will significantly change in the next twelve months.

The following information is presented on an income tax basis. Differences between amounts for financial statement and federal income tax purposes are primarily due to timing differences in recognizing certain gains and losses on investment transactions and the treatment of investments in inverse floating rate securities reflected as financing transactions, if any. To the extent that differences arise that are permanent in nature, such amounts are reclassified within the capital accounts as detailed below. Temporary differences do not require reclassification. Temporary and permanent differences do not impact the NAVs of the Funds.

As of March 31, 2014, the cost and unrealized appreciation (depreciation) of investments (excluding investments in derivatives), as determined on a federal income tax basis, were as follows:

		Build			Build America
		America			Bond
		Bond			Opportunity
		(NBB	)		(NBD	)
Cost of investments	$	571,063,013		$	136,272,612
Gross unrealized:
Appreciation	$	70,977,548		$	32,295,631
Depreciation		(7,725,582	)		(1,203,391	)
Net unrealized appreciation (depreciation) of investments	$	63,251,966		$	31,092,240

Permanent differences, primarily due to federal taxes paid, bond premium amortization and notional principal contracts reclassifications, resulted in reclassifications among the Funds’ components of net assets as of March 31, 2014, the Funds’ tax year end, as follows:

		Build			Build America
		America			Bond
		Bond			Opportunity
		(NBB	)		(NBD	)
Paid-in surplus	$	—		$	—
Undistributed (Over-distribution of) net investment income		(491,741	)		(314,955	)
Accumulated net realized gain (loss)		491,741			314,955

Nuveen Investments

Notes to Financial Statements (continued)

The tax components of undistributed net ordinary income and net long-term capital gains as of March 31, 2014, the Funds’ tax year end, were as follows:

		Build			Build America
		America			Bond
		Bond			Opportunity
		(NBB	)		(NBD	)
Undistributed net ordinary income1	$	3,516,849		$	888,756
Undistributed net long-term capital gains		—			—

1	Net ordinary income consists of net taxable income derived from dividends, interest and net short-term capital gains, if any. Undistributed net ordinary income (on a tax basis) has not been reduced for the dividend declared on March 3, 2014, and paid on April 1, 2014.

The tax character of distributions paid during the Funds’ tax years ended March 31, 2014 and March 31, 2013, was designated for purposes of the dividends paid deduction as follows:

		Build			Build America
		America			Bond
		Bond			Opportunity
2014		(NBB	)		(NBD	)
Distributions from net ordinary income2	$	36,988,563		$	9,705,472
Distributions from net long-term capital gains		—			—

		Build			Build America
		America			Bond
		Bond			Opportunity
2013		(NBB	)		(NBD	)
Distributions from net ordinary income2	$	34,651,969		$	9,251,541
Distributions from net long-term capital gains		—			—

2	Net ordinary income consists of net taxable income derived from dividends, interest, and net short-term capital gains, if any.

As of March 31, 2014, the Funds’ tax year end, the Funds had unused capital loss carryforwards available for federal income tax purposes to be applied against future capital gains, if any. If not applied, the carryforwards will expire as shown in the following table. The losses not subject to expiration will be utilized first by a Fund.

		Build			Build America
		America			Bond
		Bond			Opportunity
		(NBB	)		(NBD	)
Not subject to expiration	$	13,683,467		$	9,410,757

During the Funds’ tax year ended March 31, 2014, the Funds utilized capital loss carryforwards as follows:

		Build			Build America
		America			Bond
		Bond			Opportunity
		(NBB	)		(NBD	)
Utilized capital loss carryforwards	$	2,592,457		$	752,291

7. Management Fees and Other Transactions with Affiliates

Each Fund’s management fee compensates the Adviser for overall investment advisory and administrative services and general office facilities. The Sub-Adviser is compensated for its services to the Funds from the management fees paid to the Adviser.

Each Fund’s management fee consists of two components – a fund-level fee, based only on the amount of assets within the Fund, and a complex-level fee, based on the aggregate amount of all eligible fund assets managed by the Adviser. This pricing structure enables Fund shareholders to benefit from growth in the assets within their respective Fund as well as from growth in the amount of complex-wide assets managed by the Adviser.

Nuveen Investments

The annual fund-level fee for each Fund, payable monthly, is calculated according to the following schedule:

Average Daily Managed Assets*	Fund-Level Fee Rate
For the first $125 million		.4500	%
For the next $125 million		.4375
For the next $250 million		.4250
For the next $500 million		.4125
For the next $1 billion		.4000
For managed assets over $2 billion		.3875

The annual complex-level fee for each Fund, payable monthly, is calculated according to the following schedule:

Complex-Level Managed Asset Breakpoint Level*	Effective Rate at Breakpoint Level
$55 billion	.2000	%
$56 billion	.1996
$57 billion	.1989
$60 billion	.1961
$63 billion	.1931
$66 billion	.1900
$71 billion	.1851
$76 billion	.1806
$80 billion	.1773
$91 billion	.1691
$125 billion	.1599
$200 billion	.1505
$250 billion	.1469
$300 billion	.1445

For the fund-level and complex-level fees, managed assets include closed-end fund assets managed by the Adviser that are attributable to certain types of leverage. For these purposes, leverage includes the funds’ use of preferred stock and borrowings and certain investments in the residual interest certificates (also called inverse floating rate securities) in tender option bond (TOB) trusts, including the portion of assets held by a TOB trust that has been effectively financed by the trust’s issuance of floating rate securities, subject to an agreement by the Adviser as to certain funds to limit the amount of such assets for determining managed assets in certain circumstances. The complex-level fee is calculated based upon the aggregate daily managed assets of all Nuveen Funds that constitute “eligible assets.” Eligible assets do not include assets attributable to investments in other Nuveen Funds or assets in excess of $2 billion added to the Nuveen Fund complex in connection with the Adviser’s assumption of the management of the former First American Funds effective January 1, 2011. As of March 31, 2014, the complex-level fee rate for these Funds was .1668%.

The Funds pay no compensation directly to those of its trustees who are affiliated with the Adviser or to its officers, all of whom receive remuneration for their services to the Funds from the Adviser or its affiliates. The Board of Trustees has adopted a deferred compensation plan for independent trustees that enables trustees to elect to defer receipt of all or a portion of the annual compensation they are entitled to receive from certain Nuveen-advised funds. Under the plan, deferred amounts are treated as though equal dollar amounts had been invested in shares of select Nuveen-advised funds.

8. Borrowing Arrangements

As part of their investment strategies the Funds have each entered into a committed secured 364-day line of credit (“Borrowings”) with their custodian bank as a means of leverage. Each Fund’s maximum commitment amount under these Borrowings is as follows:

		Build			Build America
		America			Bond
		Bond			Opportunity
		(NBB	)		(NBD	)
Maximum commitment amount	$	100,000,000		$	25,000,000

As of March 31, 2014, each Fund’s outstanding balance on its Borrowings was as follows:

		Build			Build America
		America			Bond
		Bond			Opportunity
		(NBB	)		(NBD	)
Outstanding Borrowings	$	89,000,000		$	11,500,000

Nuveen Investments

Notes to Financial Statements (continued)

During the fiscal year ended March 31, 2014, the average daily balance outstanding and average annual interest rate on each Fund’s Borrowings were as follows:

		Build			Build America
		America			Bond
		Bond			Opportunity
		(NBB	)		(NBD	)
Average daily balance outstanding	$	89,000,000		$	11,500,000
Average annual interest rate		0.92	%		0.92	%

In order to maintain these Borrowings, the Funds must meet certain collateral, asset coverage and other requirements. Borrowings outstanding are fully secured by securities held in each Fund’s portfolio of investments. Interest expense incurred on each Fund’s Borrowings is calculated at a rate per annum equal to the higher of (i) the overnight Federal Funds rate plus .80% or (ii) the overnight London Inter-bank Offered Rate (LIBOR) plus .80%.

In addition to the interest expense, the Funds each pay a per annum facility fee, based on the unused portion of the commitment amount of the Borrowings through the renewal date.

On May 22, 2013, Build America Bond (NBB) renewed its Borrowings, at which time the termination date was extended through May 21, 2014. The Fund’s per annum facility fee was reduced from .15% to .10%, based on the unused portion of the commitment amount of the Borrowings through the renewal date. The Fund also paid a one-time closing fee of .05% on the maximum commitment amount of the Borrowings, which will be fully expensed through the termination date of May 21, 2014. All other terms of the Borrowings remained unchanged.

On February 19, 2013 and April 19, 2013, Build America Bond Opportunity (NBD) renewed its Borrowings, at which time the termination date was extended through April 19, 2013 and May 22, 2013, respectively. All other terms of the Borrowings remained unchanged. On May 22, 2013, the Fund amended its Borrowings, at which time the Borrowings were changed from unsecured to secured, the termination date was extended through May 21, 2014, and the Fund’s per annum facility fee was reduced from .15% to .10%, based on the unused portion of the commitment amount of the Borrowings through the renewal date. The Fund also paid a one-time closing fee of .05% on the maximum commitment amount of the Borrowings, which will be fully expensed through the termination date of May 21, 2014. All other terms of the Borrowings remained unchanged.

On May 21, 2014 (subsequent to the close of this reporting period), each Fund renewed its Borrowings, at which time the termination date was extended through May 20, 2015 and the maximum commitment amount for Build American Bond (NBB) and Build America Bond Opportunity (NBD) were reduced to $95,000,000 and $15,000,000, respectively. The interest charged on each Fund’s Borrowings was changed from the higher of (i) the overnight Federal Funds rate plus .80% or (ii) the overnight LIBOR plus .80% to the higher of (i) the overnight Federal Funds rate plus .75% or (ii) the overnight LIBOR plus .75%. Each Fund also paid a one-time closing fee of .05% on the maximum commitment amount of the Borrowings, which will be fully expensed through the termination date of May 20, 2015. All other terms of the Borrowings remained unchanged.

Borrowings outstanding are recognized as “Borrowings” on the Statement of Assets and Liabilities. Interest expense, facility fees and one-time closing fees are recognized as components of “Interest expense” on the Statement of Operations.

9. Subsequent Events

Agreement and Plan of Merger

On April 14, 2014, TIAA-CREF, a national financial services organization, announced that it had entered into an agreement (the “Purchase Agreement”) to acquire Nuveen Investments, the parent company of the Adviser. The transaction is expected to be completed by the end of the year, subject to customary closing conditions, including obtaining necessary Nuveen Fund and client consents sufficient to satisfy the terms of the Purchase Agreement and obtaining customary regulatory approvals. There can be no assurance that the transaction described above will be consummated as contemplated or that necessary conditions will be satisfied.

The consummation of the transaction will be deemed to be an “assignment” (as defined in the Investment Company Act of 1940) of the investment management agreements between the Nuveen Funds and the Adviser and the investment sub-advisory agreements between the Adviser and each Nuveen Fund’s sub-adviser or sub-advisers, and will result in automatic termination of each agreement. It is anticipated that the Board of Directors/Trustees of the Nuveen Funds (the “Board”) will consider a new investment management agreement with the Adviser and new investment sub-advisory agreements with each sub-adviser. If approved by the Board, the new agreements will be presented to the Nuveen Funds’ shareholders for approval, and, if so approved by shareholders, will take effect upon consummation of the transaction or such later time as shareholder approval is obtained.

The transaction is not expected to result in any change in the portfolio management of the Fund or in the Fund’s investment objectives or policies.

Nuveen Investments

Additional Fund Information

Board of Trustees
William Adams IV*	Robert P. Bremner	Jack B. Evans	William C. Hunter	David J. Kundert	John K. Nelson
William J. Schneider	Thomas S. Schreier, Jr.*	Judith M. Stockdale	Carole E. Stone	Virginia L. Stringer	Terence J. Toth

* Interested Board Member.

Fund Manager	Custodian	Legal Counsel	Independent Registered	Transfer Agent and
Nuveen Fund Advisors, LLC	State Street Bank	Chapman and Cutler LLP	Public Accounting Firm	Shareholder Services
333 West Wacker Drive	& Trust Company	Chicago, IL 60603	Ernst & Young LLP	State Street Bank
Chicago, IL 60606	Boston, MA 02111		Chicago, IL 60606	& Trust Company
				Nuveen Funds
				P.O. Box 43071
				Providence, RI 02940-3071
				(800) 257-8787

Quarterly Form N-Q Portfolio of Investments Information

Each Fund is required to file its complete schedule of portfolio holdings with the Securities and Exchange Commission (SEC) for the first and third quarters of each fiscal year on Form N-Q. You may obtain this information directly from the SEC. Visit the SEC on-line at http://www.sec.gov or in person at the SEC’s Public Reference Room in Washington, D.C. Call the SEC toll-free at (800) SEC -0330 for room hours and operation.

Nuveen Funds’ Proxy Voting Information

You may obtain (i) information regarding how each fund voted proxies relating to portfolio securities held during the most recent twelve-month period ended June 30, without charge, upon request, by calling Nuveen Investments toll-free at (800) 257-8787 or on Nuveen’s website at www.nuveen.com and (ii) a description of the policies and procedures that each fund used to determine how to vote proxies relating to portfolio securities without charge, upon request, by calling Nuveen Investments toll free at (800) 257-8787. You may also obtain this information directly from the SEC. Visit the SEC on-line at http://www.sec.gov.

CEO Certification Disclosure

Each Fund’s Chief Executive Officer (CEO) has submitted to the New York Stock Exchange (NYSE) the annual CEO certification as required by Section 303A.12(a) of the NYSE Listed Company Manual. Each Fund has filed with the SEC the certification of its CEO and Chief Financial Officer required by Section 302 of the Sarbanes-Oxley Act.

Share Information

Each Fund intends to repurchase shares of its own common stock at such times and in such amounts as is deemed advisable. During the period covered by this report, the Fund repurchased shares of its common stock as shown in the accompanying table. Any future repurchases will be reported to shareholders in the next annual or semi-annual report.

			NBB			NBD
Shares repurchased			—			—

FINRA BrokerCheck: The Financial Industry Regulatory Authority (FINRA) provides information regarding the disciplinary history of FINRA member firms and associated investment professionals. This information as well as an investor brochure describing FINRA BrokerCheck is available to the public by calling the FINRA BrokerCheck Hotline number at (800) 289-9999 or by visiting www.FINRA.org.

Nuveen Investments

Glossary of Terms Used in this Report

■	Auction Rate Bond: An auction rate bond is a security whose interest payments are adjusted periodically through an auction process, which process typically also serves as a means for buying and selling the bond. Auctions that fail to attract enough buyers for all the shares offered for sale are deemed to have “failed,” with current holders receiving a formula-based interest rate until the next scheduled auction.

■	Average Annual Total Return: This is a commonly used method to express an investment’s performance over a particular, usually multi-year time period. It expresses the return that would have been necessary each year to equal the investment’s actual cumulative performance (including change in NAV or market price and reinvested dividends and capital gains distributions, if any) over the time period being considered.

■	Barclays Build America Bond Index: An unleveraged index that comprises all direct pay Build America Bonds that are SEC-regulated, taxable, dollar-denominated and have at least one year to final maturity, at least $250 million par amount outstanding, and are determined to be investment grade by Barclays. Index returns assume reinvestment of distributions, but do not reflect any applicable sales charges or management fees.

■	Duration: Duration is a measure of the expected period over which a bond’s principal and interest will be paid, and consequently is a measure of the sensitivity of a bond’s or bond fund’s value to changes when market interest rates change. Generally, the longer a bond’s or fund’s duration, the more the price of the bond or fund will change as interest rates change.

■	Effective Leverage: Effective leverage is a fund’s effective economic leverage, and includes both regulatory leverage (see leverage) and the leverage effects of certain derivative investments in a Fund’s portfolio. Currently, the leverage effects of Tender Option Bond (TOB) inverse floater holdings are included in effective leverage values, in addition to any regulatory leverage.

■	Forward Interest Rate Swap: A contractual agreement between two counterparties under which one party agrees to make periodic payments to the other for an agreed period of time based on a fixed rate, while the other party agrees to make periodic payments based on a floating rate of interest based on an underlying index. Alternatively, both series of cashflows to be exchanged could be calculated using floating rates of interest but floating rates that are based upon different underlying indices.

■	Gross Domestic Product (GDP): The total market value of all final goods and services produced in a country/region in a given year, equal to total consumer, investment and government spending, plus the value of exports, minus the value of imports.

■	Inverse Floating Rate Securities: Inverse floating rate securities, also known as inverse floaters or tender option bonds (TOBs), are created by depositing a municipal bond, typically with a fixed interest rate, into a special purpose trust created by a broker-dealer. This trust, in turn, (a) issues floating rate certificates typically paying short-term tax-exempt interest rates to third parties in amounts equal to some fraction of the deposited bond’s par amount or market value, and (b) issues an inverse floating rate certificate (sometimes referred to as an “inverse floater”) to an investor (such as a fund) interested in gaining investment exposure to a long-term municipal bond. The income received by the holder of the inverse floater varies inversely with the short-term rate paid to the floating rate certificates’ holders, and in most circumstances the holder of the inverse floater bears substantially all of the underlying bond’s downside investment risk. The holder of the inverse floater typically also benefits disproportionately from any potential appreciation of the underlying bond’s value. Hence, an inverse floater essentially represents an investment in the underlying bond on a leveraged basis.

■	Leverage: Leverage is created whenever a fund has investment exposure (both reward and/or risk) equivalent to more than 100% of the investment capital.

■	Net Asset Value (NAV) Per Share: A fund’s Net Assets is equal to its total assets (securities, cash, accrued earnings and receivables) less its total liabilities. NAV per share is equal to the fund’s Net Assets divided by its number of shares outstanding.

Nuveen Investments

■	Pre-Refunding: Pre-Refunding, also known as advanced refundings or refinancings, is a procedure used by state and local governments to refinance municipal bonds to lower interest expenses. The issuer sells new bonds with a lower yield and uses the proceeds to buy U.S. Treasury securities, the interest from which is used to make payments on the higher-yielding bonds. Because of this collateral, pre-refunding generally raises a bond’s credit rating and thus its value.

■	Regulatory Leverage: Regulatory Leverage consists of preferred shares issued by or borrowings of a fund. Both of these are part of a fund’s capital structure. Regulatory leverage is subject to asset coverage limits set in the Investment Company Act of 1940.

■	Total Investment Exposure: Total investment exposure is a fund’s assets managed by the Adviser that are attributable to financial leverage. For these purposes, financial leverage includes a fund’s use of preferred stock and borrowings and investments in the residual interest certificates (also called inverse floating rate securities) in tender option bond (TOB) trusts, including the portion of assets held by a TOB trust that has been effectively financed by the trust’s issuance of floating rate securities.

■	Zero Coupon Bond: A zero coupon bond does not pay a regular interest coupon to its holders during the life of the bond. Tax-exempt income to the holder of the bond comes from accretion of the difference between the original purchase price of the bond at issuance and the par value of the bond at maturity and is effectively paid at maturity. The market prices of zero coupon bonds generally are more volatile than the market prices of bonds that pay interest periodically.

Nuveen Investments

Reinvest Automatically, Easily and Conveniently

Nuveen makes reinvesting easy. A phone call is all it takes to set up your reinvestment account.

Nuveen Closed-End Funds Automatic Reinvestment Plan

Nuveen Closed-End Fund allows you to conveniently reinvest distributions in additional Fund shares. By choosing to reinvest, you’ll be able to invest money regularly and automatically, and watch your investment grow through the power of compounding. Just like distributions in cash, there may be times when income or capital gains taxes may be payable on distributions that are reinvested. It is important to note that an automatic reinvestment plan does not ensure a profit, nor does it protect you against loss in a declining market.

Easy and convenient

To make recordkeeping easy and convenient, each month you’ll receive a statement showing your total distributions, the date of investment, the shares acquired and the price per share, and the total number of shares you own.

How shares are purchased

The shares you acquire by reinvesting will either be purchased on the open market or newly issued by the Fund. If the shares are trading at or above net asset value at the time of valuation, the Fund will issue new shares at the greater of the net asset value or 95% of the then-current market price. If the shares are trading at less than net asset value, shares for your account will be purchased on the open market. If the Plan Agent begins purchasing Fund shares on the open market while shares are trading below net asset value, but the Fund’s shares subsequently trade at or above their net asset value before the Plan Agent is able to complete its purchases, the Plan Agent may cease open-market purchases and may invest the uninvested portion of the distribution in newly-issued Fund shares at a price equal to the greater of the shares’ net asset value or 95% of the shares’ market value on the last business day immediately prior to the purchase date. Distributions received to purchase shares in the open market will normally be invested shortly after the distribution payment date. No interest will be paid on distributions awaiting reinvestment. Because the market price of the shares may increase before purchases are completed, the average purchase price per share may exceed the market price at the time of valuation, resulting in the acquisition of fewer shares than if the distribution had been paid in shares issued by the Fund. A pro rata portion of any applicable brokerage commissions on open market purchases will be paid by Plan participants. These commissions usually will be lower than those charged on individual transactions.

Flexible

You may change your distribution option or withdraw from the Plan at any time, should your needs or situation change. You can reinvest whether your shares are registered in your name, or in the name of a brokerage firm, bank, or other nominee. Ask your investment advisor if his or her firm will participate on your behalf. Participants whose shares are registered in the name of one firm may not be able to transfer the shares to another firm and continue to participate in the Plan. The Fund reserves the right to amend or terminate the Plan at any time. Although the Fund reserves the right to amend the Plan to include a service charge payable by the participants, there is no direct service charge to participants in the Plan at this time.

Call today to start reinvesting distributions

For more information on the Nuveen Automatic Reinvestment Plan or to enroll in or withdraw from the Plan, speak with your financial advisor or call us at (800) 257-8787.

Nuveen Investments

Board Members & Officers (Unaudited)

The management of the Funds, including general supervision of the duties performed for the Funds by the Adviser, is the responsibility of the Board of Trustees of the Funds. The number of trustees of the Funds is currently set at twelve. None of the trustees who are not “interested” persons of the Funds (referred to herein as “independent trustees”) has ever been a director or employee of, or consultant to, Nuveen or its affiliates. The names and business addresses of the trustees and officers of the Funds, their principal occupations and other affiliations during the past five years, the number of portfolios each oversees and other directorships they hold are set forth below.

	Name, Year of Birth & Address	Position(s) Held with the Funds	Year First Elected or Appointed and Term(1)	Principal Occupation(s) Including other Directorships During Past 5 Years	Number of Portfolios in Fund Complex Overseen by Board Member

Independent Board Members:

■	WILLIAM J. SCHNEIDER 1944 333 W. Wacker Drive Chicago, IL 60606	Chairman and Board Member	1996 Class III	Chairman of Miller-Valentine Partners, a real estate investment company; formerly, Senior Partner and Chief Operating Officer (retired (2004) of Miller-Valentine Group; an owner in several other Miller Valentine entities; Board Member of Med-America Health System, Tech Town, Inc., a not-for-profit community development company, Board Member of WDPR Public Radio station; formerly, member, Business Advisory Council, Cleveland Federal Reserve Bank and University of Dayton Business School Advisory Council.	209

■	ROBERT P. BREMNER 1940 333 W. Wacker Drive Chicago, IL 60606	Board Member	1996 Class III	Private Investor and Management Consultant; Treasurer and Director, Humanities Council of Washington, D.C.; Board Member, Independent Directors Council affiliated with the Investment Company Institute. Company Institute.	209

■	JACK B. EVANS 1948 333 W. Wacker Drive Chicago, IL 60606	Board Member	1999 Class III	President, The Hall-Perrine Foundation, a private philanthropic corporation (since 1996); Chairman, United Fire Group, a publicly held company; formerly, Member and President Pro-Tem of the Board of Regents for the State of Iowa University System; Director, Source Media Group; Life Trustee of Coe College; formerly, Director, Alliant Energy; formerly, Director, Federal Reserve Bank of Chicago; formerly, President and Chief Operating Officer, SCI Financial Group, Inc., a regional financial services firm.	209

■	WILLIAM C. HUNTER 1948 333 W. Wacker Drive Chicago, IL 60606	Board Member	2004 Class I	Dean Emeritus (since June 30, 2012), formerly, Dean, Tippie College of Business, University of Iowa (2006-2012); Director (since 2004) of Xerox Corporation; Director (since 2005), and President (since July 2012) Beta Gamma Sigma, Inc., The International Honor Society; Director of Wellmark, Inc. (since 2009); formerly, Dean and Distinguished Professor of Finance, School of Business at the University of Connecticut (2003-2006); previously, Senior Vice President and Director of Research at the Federal Reserve Bank of Chicago (1995-2003); formerly, Director (1997-2007), Credit Research Center at Georgetown University.	209

■	DAVID J. KUNDERT 1942 333 W. Wacker Drive Chicago, IL 60606	Board Member	2005 Class II	Formerly, Director, Northwestern Mutual Wealth Management Company (2006-2013), retired (since 2004) as Chairman, JPMorgan Fleming Asset Management, President and CEO, Banc One Investment Advisors Corporation, and President, One Group Mutual Funds; prior thereto, Executive Vice President, Banc One Corporation and Chairman and CEO, Banc One Investment Management Group; Regent Emeritus, Member of Investment Committee, Luther College; member of the Wisconsin Bar Association; member of Board of Directors, Friends of Boerner Botanical Gardens; member of Board of Directors and Chair of Investment Committee, Greater Milwaukee Foundation; member of the Board of Directors (Milwaukee), College Possible.	209

Nuveen Investments

Board Members & Officers (Unaudited) (continued)

	Name, Year of Birth & Address	Position(s) Held with the Funds	Year First Elected or Appointed and Term(1)	Principal Occupation(s) Including other Directorships During Past 5 Years	Number of Portfolios in Fund Complex Overseen by Board Member

Independent Board Members (continued):

■	JOHN K. NELSON 1962 333 West Wacker Drive Chicago, IL 60606	Board Member	2013 Class II	Senior external advisor to the financial services practice of Deloitte Consulting LLP (since 2012); Member of Board of Directors of Core12 LLC since 2008), a private firm which develops branding, marketing and communications strategies for clients; Director of The Curran Center for Catholic American Studies (since 2009) and The President’s Council, Fordham University (since 2010); formerly, Chairman of the Board of Trustees of Marian University (2010 as trustee, 2011-2014 as Chairman); formerly, Chief Executive Officer of ABN AMRO N.V. North America, and Global Head of its Financial Markets Division (2007-2008); prior senior positions held at ABN AMRO include Corporate Executive Vice President and Head of Global Markets-the Americas (2006-2007), CEO of Whole- sale Banking North America and Global Head of Foreign Exchange and Futures Markets (2001-2006), and Regional Commercial Treasurer and Senior Vice President Trading-North America (1996-2001); formerly, Trustee at St. Edmund Preparatory School in New York City.	209

■	JUDITH M. STOCKDALE 1947 333 W. Wacker Drive Chicago, IL 60606	Board Member	1997 Class I	Board Member, Land Trust Alliance (since June 2013) and U.S. Endowment for Forestry and Communities (since November 2013); formerly, Executive Director (1994-2012), Gaylord and Dorothy Donnelley Foundation (since 1994); prior thereto, Executive Director, Great Lakes Protection Fund (1990-1994).	209

■	CAROLE E. STONE 1947 333 W. Wacker Drive Chicago, IL 60606	Board Member	2007 Class I	Director, Chicago Board Options Exchange (since 2006); Director, C2 Options Exchange, Incorporated (since 2009); Director, CBOE Holdings, Inc. (since 2010); formerly, Commissioner, New York State Commission on Public Authority Reform (2005-2010); formerly, Chair, New York Racing Association Oversight Board (2005-2007).	209

■	VIRGINIA L. STRINGER 1944 333 W. Wacker Drive Chicago, IL 60606	Board Member	2011 Class I	Board Member, Mutual Fund Directors Forum; former governance consultant and non-profit board member; former Owner and President, Strategic Management Resources, Inc., a management consulting firm; former Member, Governing Board, Investment Company Institute’s Independent Directors Council; previously, held several executive positions in general management, marketing and human resources at IBM and The Pillsbury Company; Independent Director, First American Fund Complex (1987-2010) and Chair (1997-2010).	209

■	TERENCE J. TOTH 1959 333 W. Wacker Drive Chicago, IL 60606	Board Member	2008 Class II	Managing Partner, Promus Capital (since 2008); Director, Fulcrum IT Service LLC (since 2010), Quality Control Corporation (since 2012) and LogicMark LLC (since 2012); formerly, Director, Legal & General Investment Management America, Inc. (2008-2013); formerly, CEO and President, Northern Trust Global Investments (2004-2007); Executive Vice President, Quantitative Management & Securities Lending (2000-2004); prior thereto, various positions with Northern Trust Company (since 1994); member: Chicago Fellowship Board (since 2005), Catalyst Schools of Chicago Board (since 2008) and Chairman, and Mather Foundation Board (since 2012), and a member of its investment committee; formerly, Member, Northern Trust Mutual Funds Board (2005-2007), Northern Trust Global Investments Board (2004-2007), Northern Trust Japan Board (2004-2007), Northern Trust Securities Inc. Board (2003-2007) and Northern Trust Hong Kong Board (1997-2004).	209

Nuveen Investments

	Name, Year of Birth & Address	Position(s) Held with the Funds	Year First Elected or Appointed and Term(1)	Principal Occupation(s) Including other Directorships During Past 5 Years	Number of Portfolios in Fund Complex Overseen by Board Member

Interested Board Members:

■	WILLIAM ADAMS IV(2) 1955 333 W. Wacker Drive Chicago, IL 60606	Board Member	2013 Class II	Senior Executive Vice President, Global Structured Products (since 2010); formerly, Executive Vice President, U.S. Structured Products, of Nuveen Investments, Inc. (1999-2010); Co-President of Nuveen Fund Advisors, LLC (since 2011); President (since 2011), formerly, Managing Director (2010-2011) of Nuveen Commodities Asset Management, LLC; Board Member of the Chicago Symphony Orchestra and of Gilda s Club Chicago.	133

■	THOMAS S. SCHREIER, JR.(2) 1962 333 W. Wacker Drive Chicago, IL 60606	Board Member	2013 Class III	Vice Chairman, Wealth Management of Nuveen Investments, Inc. (since 2011); Co-President of Nuveen Fund Advisors, LLC; Chairman of Nuveen Asset Management, LLC (since 2011); Co-Chief Executive Officer of Nuveen Securities, LLC (since 2011); Member of Board of Governors and Chairman’s Council of the Investment Company Institute; formerly, Chief Executive Officer (2000-2010) and Chief Investment Officer (2007-2010) of FAF Advisors, Inc.; formerly, President of First American Funds (2001-2010).	133

	Name, Year of Birth & Address	Position(s) Held with the Funds	Year First Elected or Appointed(3)	Principal Occupation(s) During Past 5 Years	Number of Portfolios in Fund Complex Overseen by Officer

Officers of the Funds:

■	GIFFORD R. ZIMMERMAN 1956 333 W. Wacker Drive Chicago, IL 60606	Chief Administrative Officer	1988	Managing Director (since 2002), and Assistant Secretary of Nuveen Securities, LLC; Managing Director (since 2004) and Assistant Secretary (since 1994) of Nuveen Investments, Inc.; Managing Director (since 2002), Assistant Secretary (since 1997) and Co-General Counsel (since 2011) of Nuveen Fund Advisors, LLC; Managing Director, Assistant Secretary and Associate General Counsel of Nuveen Asset Management, LLC (since 2011); Managing Director, Associate General Counsel and Assistant Secretary, of Symphony Asset Management LLC (since 2003); Vice President and Assistant Secretary of NWQ Investment Management Company, LLC (since 2002), Nuveen Investments Advisers Inc. (since 2002), Santa Barbara Asset Management, LLC (since 2006), and of Winslow Capital Management, LLC, (since 2010); Vice President and Assistant Secretary (since 2013), formerly, Chief Administrative Officer and Chief Compliance Officer (2006-2013) of Nuveen Commodities Asset Management, LLC; Chartered Financial Analyst.	209

■	CEDRIC H. ANTOSIEWICZ 1962 333 W. Wacker Drive Chicago, IL 60606	Vice President	2007	Managing Director of Nuveen Securities, LLC.	101

■	MARGO L. COOK 1964 333 W. Wacker Drive Chicago, IL 60606	Vice President	2009	Executive Vice President (since 2008) of Nuveen Investments, Inc. and of Nuveen Fund Advisors, LLC (since 2011); Managing Director-Investment Services of Nuveen Commodities Asset Management, LLC (since August 2011), previously, Head of Institutional Asset Management (2007-2008) of Bear Stearns Asset Management; Head of Institutional Asset Management (1986-2007) of Bank of NY Mellon; Chartered Financial Analyst.	209

Nuveen Investments

Board Members & Officers (Unaudited) (continued)

	Name, Year of Birth & Address	Position(s) Held with the Funds	Year First Elected or Appointed(3)	Principal Occupation(s) During Past 5 Years	Number of Portfolios in Fund Complex Overseen by Officer

Officers of the Funds (continued):

■	LORNA C. FERGUSON 1945 333 W. Wacker Drive Chicago, IL 60606	Vice President	1998	Managing Director (since 2005) of Nuveen Fund Advisors, LLC and Nuveen Securities, LLC (since 2004).	209

■	STEPHEN D. FOY 1954 333 W. Wacker Drive Chicago, IL 60606	Vice President and Controller	1998	Managing Director (since 2014), formerly, Senior Vice President (2013-2014), and Vice President of Nuveen Fund Advisors, LLC; Chief Financial Officer of Nuveen Commodities Asset Management, LLC (since 2010); Senior Vice President (2010-2011), Formerly Vice President (2005-2010) and Funds Controller of Nuveen Securities, LLC; Certified Public Accountant.	209

■	SCOTT S. GRACE 1970 333 W. Wacker Drive	Vice President and Treasurer	2009	Managing Director, Corporate Finance & Development, Treasurer (since 2009) of Nuveen Securities, LLC; Managing Director and Treasurer (since 2009) of Nuveen Fund Advisors, LLC, Nuveen Investments Advisers, Inc., Nuveen Investments Holdings Inc. and (since 2011) Nuveen Asset Management, LLC; Vice President and Treasurer of NWQ Investment Management Company, LLC, Tradewinds Global Investors, LLC, Symphony Asset Management LLC and Winslow Capital Management, LLC.; Vice President of Santa Barbara Asset Management, LLC; formerly, Treasurer (2006-2009), Senior Vice President (2008-2009), previously, Vice President (2006-2008) of Janus Capital Group, Inc.; formerly, Senior Associate in Morgan Stanley’s Global Financial Services Group (2000-2003); Chartered Accountant Designation.	209

■	WALTER M. KELLY 1970 333 W. Wacker Drive Chicago, IL 60606	Chief Compliance Officer and Vice President	2003	Senior Vice President (since 2008) of Nuveen Investment Holdings, Inc.	209

■	TINA M. LAZAR 1961 333 W. Wacker Drive Chicago, IL 60606	Vice President	2002	Senior Vice President of Nuveen Investment Holdings, Inc.	209

■	KEVIN J. MCCARTHY 1966 333 W. Wacker Drive Chicago, IL 60606	Vice President and Secretary	2007	Managing Director and Assistant Secretary (since 2008), Nuveen Securities, LLC; Managing Director (since 2008), Assistant Secretary since 2007) and Co-General Counsel (since 2011) of Nuveen Fund Advisors, LLC; Managing Director, Assistant Secretary and Associate General Counsel (since 2011) of Nuveen Asset Management, LLC; Managing Director (since 2008), and Assistant Secretary, Nuveen Investment Holdings, Inc.; Vice President (since 2007) and Assistant Secretary of Nuveen Investments Advisers Inc., NWQ Investment Management Company, LLC, NWQ Holdings, LLC, Symphony Asset Management LLC, Santa Barbara Asset Management, LLC, and of Winslow Capital Management, LLC. (since 2010); Vice President and Secretary (since 2010) of Nuveen Commodities Asset Management, LLC.	209

Nuveen Investments

	Name, Year of Birth & Address	Position(s) Held with the Funds	Year First Elected or Appointed(3)	Principal Occupation(s) During Past 5 Years	Number of Portfolios in Fund Complex Overseen by Officer
Officers of the Funds (continued):

■	KATHLEEN L. PRUDHOMME 1953 901 Marquette Avenue Minneapolis, MN 55402	Vice President and Assistant Secretary	2011	Managing Director, Assistant Secretary and Co-General Counsel (since 2011) of Nuveen Fund Advisors, LLC; Managing Director, Assistant Secretary and Associate General Counsel (since 2011) of Nuveen Asset Management, LLC; Managing Director and Assistant Secretary (since 2011) of Nuveen Securities, LLC; formerly, Deputy General Counsel, FAF Advisors, Inc. (2004-2010).	209

■	JOEL T. SLAGER 1978 333 West Wacker Drive Chicago, IL 60606	Vice President and Assistant Secretary	2013	Fund Tax Director for Nuveen Funds (since May, 2013); previously, Vice President of Morgan Stanley Investment Management, Inc., Assistant Treasurer of the Morgan Stanley Funds (from 2010 to 2013); Tax Director at PricewaterhouseCoopers LLP (from 2008 to 2010).	209

(1)	The Board of Trustees is divided into three classes, Class I, Class II, and Class III, with each being elected to serve until the third succeeding annual shareholders’ meeting subsequent to its election or thereafter in each case when its respective successors are duly elected or appointed. The year first elected or appointed represents the year in which the board member was first elected or appointed to any fund in the Nuveen Complex.
(2)	“Interested person” as defined in the 1940 Act, by reason of his position with Nuveen Investments, Inc. and certain of its subsidiaries, which are affiliates of the Nuveen Funds.
(3)	Officers serve one year terms through August of each year. The year first elected or appointed represents the year in which the Officer was first elected or appointed to any fund in the Nuveen Complex.

Nuveen Investments

Nuveen Investments:
	Serving Investors for Generations

Since 1898, financial advisors and their clients have relied on Nuveen Investments to provide dependable investment solutions through continued adherence to proven, long-term investing principles. Today, we offer a range of high quality equity and fixed-income solutions designed to be integral components of a well-diversified core portfolio.

Focused on meeting investor needs.

Nuveen Investments provides high-quality investment services designed to help secure the long-term goals of institutional and individual investors as well as the consultants and financial advisors who serve them. Nuveen Investments markets a wide range of specialized investment solutions which provide investors access to capabilities of its high-quality boutique investment affiliates—Nuveen Asset Management, Symphony Asset Management, NWQ Investment Management Company, Santa Barbara Asset Management, Tradewinds Global Investors, Winslow Capital Management and Gresham Investment Management. In total, Nuveen Investments managed approximately $225 billion as of March 31, 2014.

Find out how we can help you.

To learn more about how the products and services of Nuveen Investments may be able to help you meet your financial goals, talk to your financial advisor, or call us at (800) 257-8787. Please read the information provided carefully before you invest. Investors should consider the investment objective and policies, risk considerations, charges and expenses of any investment carefully. Where applicable, be sure to obtain a prospectus, which contains this and other relevant information. To obtain a prospectus, please contact your securities representative or Nuveen Investments, 333 W. Wacker Dr., Chicago, IL 60606. Please read the prospectus carefully before you invest or send money.

Learn more about Nuveen Funds at: www.nuveen.com/cef

Distributed by Nuveen Investments, LLC | 333 West Wacker Drive | Chicago, IL 60606 | www.nuveen.com

EAN-C-0314D 1218-INV-Y05/15

ITEM 2. CODE OF ETHICS.

As of the end of the period covered by this report, the registrant has adopted a code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions. There were no amendments to or waivers from the Code during the period covered by this report. The registrant has posted the code of ethics on its website at www.nuveen.com/CEF/Shareholder/FundGovernance.aspx. (To view the code, click on Code of Conduct.)

ITEM 3. AUDIT COMMITTEE FINANCIAL EXPERT.

The registrant's Board of Directors or Trustees (“Board”) determined that the registrant has at least one “audit committee financial expert” (as defined in Item 3 of Form N-CSR) serving on its Audit Committee. The registrant's audit committee financial expert is Carole E. Stone, who is “independent” for purposes of Item 3 of Form N-CSR.

Ms. Stone served for five years as Director of the New York State Division of the Budget. As part of her role as Director, Ms. Stone was actively involved in overseeing the development of the State's operating, local assistance and capital budgets, its financial plan and related documents; overseeing the development of the State's bond-related disclosure documents and certifying that they fairly presented the State's financial position; reviewing audits of various State and local agencies and programs; and coordinating the State's system of internal audit and control. Prior to serving as Director, Ms. Stone worked as a budget analyst/examiner with increasing levels of responsibility over a 30 year period, including approximately five years as Deputy Budget Director. Ms. Stone has also served as Chair of the New York State Racing Association Oversight Board, as Chair of the Public Authorities Control Board, as a Commissioner on the New York State Commission on Public Authority Reform and as a member of the Boards of Directors of several New York State public authorities. These positions have involved overseeing operations and finances of certain entities and assessing the adequacy of project/entity financing and financial reporting. Currently, Ms. Stone is on the Board of Directors of CBOE Holdings, Inc., of the Chicago Board Options Exchange, and of C2 Options Exchange. Ms. Stone's position on the boards of these entities and as a member of both CBOE Holdings' Audit Committee and its Finance Committee has involved, among other things, the oversight of audits, audit plans and preparation of financial statements.

ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES.

Nuveen Build America Bond Fund

The following tables show the amount of fees that Ernst & Young LLP, the Fund's auditor, billed to the Fund during the Fund's last two full fiscal years. For engagements with Ernst & Young LLP the Audit Committee approved in advance all audit services and non-audit services that Ernst & Young LLP provided to the Fund, except for those non-audit services that were subject to the pre-approval exception under Rule 2-01 of Regulation S-X (the “pre-approval exception”). The pre-approval exception for services provided directly to the Fund waives the pre-approval requirement for services other than audit, review or attest services if: (A) the aggregate amount of all such services provided constitutes no more than 5% of the total amount of revenues paid by the Fund to its accountant during the fiscal year in which the services are provided; (B) the Fund did not recognize the services as non-audit services at the time of the engagement; and (C) the services are promptly brought to the Audit Committee's attention, and the Committee (or its delegate) approves the services before the audit is completed.

The Audit Committee has delegated certain pre-approval responsibilities to its Chairman (or, in his absence, any other member of the Audit Committee).

SERVICES THAT THE FUND'S AUDITOR BILLED TO THE FUND

	Audit Fees Billed			Audit-Related Fees			Tax Fees			All Other Fees
Fiscal Year Ended	to Fund 1			Billed to Fund 2			Billed to Fund 3			Billed to Fund 4
March 31, 2014	$	24,750		$	0		$	0		$	0

Percentage approved		0	%		0	%		0	%		0	%
pursuant to
pre-approval
exception

March 31, 2013	$	22,250		$	0		$	0		$	0

Percentage approved		0	%		0	%		0	%		0	%
pursuant to
pre-approval
exception

1 "Audit Fees" are the aggregate fees billed for professional services for the audit of the Fund's annual financial statements and services provided in
connection with statutory and regulatory filings or engagements.

2 "Audit Related Fees" are the aggregate fees billed for assurance and related services reasonably related to the performance of the audit or review of
financial statements that are not reported under "Audit Fees". These fees include offerings related to the Fund's common shares and leverage.

3 "Tax Fees" are the aggregate fees billed for professional services for tax advice, tax compliance, and tax planning. These fees include: all global
withholding tax services; excise and state tax reviews; capital gain, tax equalization and taxable basis calculation performed by the principal accountant.

4 "All Other Fees" are the aggregate fees billed for products and services other than "Audit Fees", "Audit-Related Fees" and "Tax Fees". These fees
represent all "Agreed-Upon Procedures" engagements pertaining to the Fund's use of leverage.

SERVICES THAT THE FUND'S AUDITOR BILLED TO THE ADVISER AND AFFILIATED FUND SERVICE PROVIDERS

The following tables show the amount of fees billed by Ernst & Young LLP to Nuveen Fund Advisors, LLC (formerly Nuveen Fund Advisors, Inc.) (the “Adviser”), and any entity controlling, controlled by or under common control with the Adviser that provides ongoing services to the Fund (“Affiliated Fund Service Provider”), for engagements directly related to the Fund's operations and financial reporting, during the Fund's last two full fiscal years.

The tables also show the percentage of fees subject to the pre-approval exception. The pre-approval exception for services provided to the Adviser and any Affiliated Fund Service Provider (other than audit, review or attest services) waives the pre-approval requirement if: (A) the aggregate amount of all such services provided constitutes no more than 5% of the total amount of revenues paid to Ernst & Young LLP by the Fund, the Adviser and Affiliated Fund Service Providers during the fiscal year in which the services are provided that would have to be pre-approved by the Audit Committee; (B) the Fund did not recognize the services as non-audit services at the time of the engagement; and (C) the services are promptly brought to the Audit Committee's attention, and the Committee (or its delegate) approves the services before the Fund's audit is completed.

	Audit-Related Fees	Tax Fees Billed to	All Other Fees
	Billed to Adviser and	Adviser and	Billed to Adviser
	Affiliated Fund	Affiliated Fund	and Affiliated Fund
Fiscal Year Ended	Service Providers	Service Providers	Service Providers
March 31, 2014	$ 0	$ 0	$ 0

Percentage approved	0%	0%	0%
pursuant to
pre-approval
exception
March 31, 2013	$ 0	$ 0	$ 0

Percentage approved	0%	0%	0%
pursuant to
pre-approval
exception

NON-AUDIT SERVICES

The following table shows the amount of fees that Ernst & Young LLP billed during the Fund's last two full fiscal years for non-audit services. The Audit Committee is required to pre-approve non-audit services that Ernst & Young LLP provides to the Adviser and any Affiliated Fund Services Provider, if the engagement related directly to the Fund's operations and financial reporting (except for those subject to the pre-approval exception described above). The Audit Committee requested and received information from Ernst & Young LLP about any non-audit services that Ernst & Young LLP rendered during the Fund's last fiscal year to the Adviser and any Affiliated Fund Service Provider. The Committee considered this information in evaluating Ernst & Young LLP's independence.

		Total Non-Audit Fees
		billed to Adviser and
		Affiliated Fund Service	Total Non-Audit Fees
		Providers (engagements	billed to Adviser and
		related directly to the	Affiliated Fund Service
	Total Non-Audit Fees	operations and financial	Providers (all other
Fiscal Year Ended	Billed to Fund	reporting of the Fund)	engagements)	Total
March 31, 2014	$ 0	$ 0	$ 0	$ 0
March 31, 2013	$ 0	$ 0	$ 0	$ 0


"Non-Audit Fees billed to Fund" for both fiscal year ends represent "Tax Fees" and "All Other Fees" billed to Fund in their respective
amounts from the previous table.

Less than 50 percent of the hours expended on the principal accountant's engagement to audit the registrant's financial statements for the most recent
fiscal year were attributed to work performed by persons other than the principal accountant's full-time, permanent employees.

Audit Committee Pre-Approval Policies and Procedures. Generally, the Audit Committee must approve (i) all non-audit services to be performed for the Fund by the Fund's independent accountants and (ii) all audit and non-audit services to be performed by the Fund's independent accountants for the Affiliated Fund Service Providers with respect to operations and financial reporting of the Fund. Regarding tax and research projects conducted by the independent accountants for the Fund and Affiliated Fund Service Providers (with respect to operations and financial reports of the Fund) such engagements will be (i) pre-approved by the Audit Committee if they are expected to be for amounts greater than $10,000; (ii) reported to the Audit Committee chairman for his verbal approval prior to engagement if they are expected to be for amounts under $10,000 but greater than $5,000; and (iii) reported to the Audit Committee at the next Audit Committee meeting if they are expected to be for an amount under $5,000.

ITEM 5. AUDIT COMMITTEE OF LISTED REGISTRANTS.

The registrant's Board has a separately designated Audit Committee established in accordance with Section 3(a)(58)(A) of the Securities Exchange Act of 1934, as amended (15 U.S.C. 78c(a)(58)(A)). The members of the audit committee are Robert P. Bremner, Terence J. Toth, Jack B. Evans, Carole E. Stone and David J. Kundert.

ITEM 6. SCHEDULE OF INVESTMENTS.

a) See Portfolio of Investments in Item 1.

b) Not applicable.

ITEM 7. DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR CLOSED-END MANAGEMENT INVESTMENT COMPANIES.

Nuveen Fund Advisors, LLC, formerly known as Nuveen Fund Advisors, Inc., is the registrant’s investment adviser (also referred to as the “Adviser”). The Adviser is responsible for the on-going monitoring of the Fund’s investment portfolio, managing the Fund’s business affairs and providing certain clerical, bookkeeping and administrative services. The Adviser has engaged Nuveen Asset Management, LLC (“Sub-Adviser”) as Sub-Adviser to provide discretionary investment advisory services. As part of these services, the Adviser has delegated to the Sub-Adviser the full responsibility for proxy voting on securities held in the registrant’s portfolio and related duties in accordance with the Sub-Adviser's policies and procedures. The Adviser periodically monitors the Sub-Adviser's voting to ensure that it is carrying out its duties. The Sub-Adviser’s proxy voting policies and procedures are attached to this filing as an exhibit and incorporated herein by reference.

ITEM 8. PORTFOLIO MANAGERS OF CLOSED-END MANAGEMENT INVESTMENT COMPANIES.

The Portfolio Managers

The following individuals have primary responsibility for the day-to-day implementation of the registrant’s investment strategies:

Name	Fund
Daniel J. Close	Nuveen Build America Bond Fund
John V. Miller	Nuveen Build America Bond Fund

Other Accounts Managed. In addition to managing the registrant, the portfolio manager is also primarily responsible for the day-to-day portfolio management of the following accounts:

Portfolio Manager	Type of Account Managed	Number of Accounts	Assets
Daniel J. Close	Registered Investment Company	16	$4.72 billion
	Other Pooled Investment Vehicles	0	$0
	Other Accounts	11	$391.6 million
John V. Miller	Registered Investment Company	9	$ 14.1 billion
	Other Pooled Investment Vehicles	7	$545 million
	Other Accounts	12	$6 million

*	Assets are as of March 31, 2014. None of the assets in these accounts are subject to an advisory fee based on performance.

POTENTIAL MATERIAL CONFLICTS OF INTEREST

Actual or apparent conflicts of interest may arise when a portfolio manager has day-to-day management responsibilities with respect to more than one account. More specifically, portfolio managers who manage multiple accounts are presented a number of potential conflicts, including, among others, those discussed below.

The management of multiple accounts may result in a portfolio manager devoting unequal time and attention to the management of each account. Nuveen Asset Management seeks to manage such competing interests for the time and attention of portfolio managers by having portfolio managers focus on a particular investment discipline. Most accounts managed by a portfolio manager in a particular investment strategy are managed using the same investment models.

If a portfolio manager identifies a limited investment opportunity which may be suitable for more than one account, an account may not be able to take full advantage of that opportunity due to an allocation of filled purchase or sale orders across all eligible accounts. To deal with these situations, Nuveen Asset Management has adopted procedures for allocating limited opportunities across multiple accounts.

With respect to many of its clients’ accounts, Nuveen Asset Management determines which broker to use to execute transaction orders, consistent with its duty to seek best execution of the transaction. However, with respect to certain other accounts, Nuveen Asset Management may be limited by the client with respect to the selection of brokers or may be instructed to direct trades through a particular broker. In these cases, Nuveen Asset Management may place separate, non-simultaneous, transactions for a Fund and other accounts which may temporarily affect the market price of the security or the execution of the transaction, or both, to the detriment of the Fund or the other accounts.

Some clients are subject to different regulations. As a consequence of this difference in regulatory requirements, some clients may not be permitted to engage in all the investment techniques or transactions or to engage in these transactions to the same extent as the other accounts managed by the portfolio manager. Finally, the appearance of a conflict of interest may arise where Nuveen Asset Management has an incentive, such as a performance-based management fee, which relates to the management of some accounts, with respect to which a portfolio manager has day-to-day management responsibilities.

Nuveen Asset Management has adopted certain compliance procedures which are designed to address these types of conflicts common among investment managers. However, there is no guarantee that such procedures will detect each and every situation in which a conflict arises.

Item 8(a)(3).

FUND MANAGER COMPENSATION

Portfolio manager compensation consists primarily of base pay, an annual cash bonus and long term incentive payments.

Base pay. Base pay is determined based upon an analysis of the portfolio manager’s general performance, experience, and market levels of base pay for such position.

Annual cash bonus. The Fund’s portfolio managers are eligible for an annual cash bonus based on investment performance, qualitative evaluation and financial performance of Nuveen Asset Management.

A portion of each portfolio manager’s annual cash bonus is based on the Fund’s investment performance, generally measured over the past one- and three or five-year periods unless the portfolio manager’s tenure is shorter. Investment performance for the Fund generally is determined by evaluating the Fund’s performance relative to its benchmark(s) and/or Lipper industry peer group.

A portion of the cash bonus is based on a qualitative evaluation made by each portfolio manager’s supervisor taking into consideration a number of factors, including the portfolio manager’s team collaboration, expense management, support of personnel responsible for asset growth, and his or her compliance with Nuveen Asset Management’s policies and procedures.

The final factor influencing a portfolio manager’s cash bonus is the financial performance of Nuveen Asset Management based on its operating earnings.

Long-term incentive compensation. Certain key employees of Nuveen Investments and its affiliates, including certain portfolio managers, have received equity interests in the parent company of Nuveen Investments. In addition, certain key employees of Nuveen Asset Management, including certain portfolio managers, have received profit interests in Nuveen Asset Management which entitle their holders to participate in the firm’s growth over time.

There are generally no differences between the methods used to determine compensation with respect to the Fund and the Other Accounts shown in the table above.

Beneficial Ownership of Securities. As of March 31, 2014, the portfolio managers beneficially owned the following dollar range of equity securities issued by the Fund and other Nuveen Funds managed by Nuveen Asset Management’s municipal investment team.

Name of Portfolio Manager	Fund	Dollar range of equity securities beneficially owned in Fund	Dollar range of equity securities beneficially owned in the remainder of Nuveen funds managed by Nuveen Asset Management’s municipal investment team
Daniel J. Close	Nuveen Build America Bond Fund	$0	$0
John V. Miller	Nuveen Build America Bond Fund	$0	$500,001-$1,000,000

PORTFOLIO MANAGER BIO:

Daniel J. Close, CFA, is a Senior Vice President of Nuveen Investments. He joined Nuveen Investments in 2000 as a member of Nuveen’s product management and development team. He then served as a research analyst for Nuveen’s municipal investing team, covering corporate-backed, energy, transportation and utility credits. He received his BS in Business from Miami University and his MBA from Northwestern University’s Kellogg School of Management. Mr. Close has earned the Chartered Financial Analyst designation. Mr. Close also serves as a portfolio manager for various Nuveen Build America Bond strategies. He manages investments for 16 Nuveen-sponsored investment companies.

John V. Miller, CFA, joined Nuveen's investment management team as a credit analyst in 1996, with three prior years of experience in the municipal market with C.W. Henderson & Assoc., a municipal bond manager for private accounts. He has a BA in Economics and Political Science from Duke University, and an MA in Economics from Northwestern University and an MBA with honors in Finance from the University of Chicago. He has been responsible for analysis of high yield credits in the utility, solid waste and energy related sectors. He is a Managing Director and Co-Head of Fixed Income of Nuveen Asset Management. He manages investments for 10 Nuveen-sponsored investment companies.

ITEM 9. PURCHASES OF EQUITY SECURITIES BY CLOSED-END MANAGEMENT INVESTMENT COMPANY AND AFFILIATED PURCHASERS.

Not applicable.

ITEM 10. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS.

There have been no material changes to the procedures by which shareholders may recommend nominees to the registrant's Board implemented after the registrant last provided disclosure in response to this Item.

ITEM 11. CONTROLS AND PROCEDURES.

(a)

The registrant's principal executive and principal financial officers, or persons performing similar functions, have concluded that the registrant's disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940, as amended (the “1940 Act”) (17 CFR 270.30a-3(c))) are effective, as of a date within 90 days of the filing date of this report that includes the disclosure required by this paragraph, based on their evaluation of the controls and procedures required by Rule 30a-3(b) under the 1940 Act (17 CFR 270.30a-3(b)) and Rules 13a-15(b) or 15d-15(b) under the Securities Exchange Act of 1934, as amended (the “Exchange Act”) (17 CFR 240.13a-15(b) or 240.15d-15(b)).

(b)

There were no changes in the registrant's internal control over financial reporting (as defined in Rule 30a-3(d) under the 1940 Act (17 CFR 270.30a-3(d)) that occurred during the second fiscal quarter of the period covered by this report that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting.

ITEM 12. EXHIBITS.

File the exhibits listed below as part of this Form.

(a)(1)

Any code of ethics, or amendment thereto, that is the subject of the disclosure required by Item 2, to the extent that the registrant intends to satisfy the Item 2 requirements through filing of an exhibit: Not applicable because the code is posted on registrant's website at www.nuveen.com/CEF/Shareholder/FundGovernance.aspx and there were no amendments during the period covered by this report. (To view the code, click on Code of Conduct.)

(a)(2)

A separate certification for each principal executive officer and principal financial officer of the registrant as required by Rule 30a-2(a) under the 1940 Act (17 CFR 270.30a-2(a)) in the exact form set forth below: Ex-99.CERT Attached hereto.

(a)(3)

Any written solicitation to purchase securities under Rule 23c-1 under the 1940 Act (17 CFR 270.23c-1) sent or given during the period covered by the report by or on behalf of the registrant to 10 or more persons. Not applicable.

(b)

If the report is filed under Section 13(a) or 15(d) of the Exchange Act, provide the certifications required by Rule 30a-2(b) under the 1940 Act (17 CFR 270.30a-2(b)); Rule 13a-14(b) or Rule 15d-14(b) under the Exchange Act (17 CFR 240.13a-14(b) or 240.15d-14(b)), and Section 1350 of Chapter 63 of Title 18 of the United States Code (18 U.S.C. 1350) as an exhibit. A certification furnished pursuant to this paragraph will not be deemed “filed” for purposes of Section 18 of the Exchange Act (15 U.S.C. 78r), or otherwise subject to the liability of that section. Such certification will not be deemed to be incorporated by reference into any filing under the Securities Act of 1933 or the Exchange Act, except to the extent that the registrant specifically incorporates it by reference. Ex-99.906 CERT attached hereto.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

(Registrant) Nuveen Build America Bond Fund

By (Signature and Title) /s/ Kevin J. McCarthy

Kevin J. McCarthy

Vice President and Secretary

Date: June 5, 2014

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

By (Signature and Title) /s/ Gifford R. Zimmerman

Gifford R. Zimmerman

Chief Administrative Officer

(principal executive officer)

Date: June 5, 2014

By (Signature and Title) /s/ Stephen D. Foy

Stephen D. Foy

Vice President and Controller

(principal financial officer)

Date: June 5, 2014