OMB APPROVAL OMB Number: 3235-0570 Expires: August 31, 2013 Estimated average burden hours per response.....18.9 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 811-02864 Pioneer Bond Fund (Exact name of registrant as specified in charter) 60 State Street, Boston, MA 02109 (Address of principal executive offices) (ZIP code) Terrence J. Cullen, Pioneer Investment Management, Inc., 60 State Street, Boston, MA 02109 (Name and address of agent for service) Registrant's telephone number, including area code: (617) 742-7825 Date of fiscal year end: June 30 Date of reporting period: July 1, 2011 through June 30, 2012 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 SHAREOWNERS. Pioneer Bond Fund -------------------------------------------------------------------------------- Annual Report | June 30, 2012 -------------------------------------------------------------------------------- Ticker Symbols: Class A PIOBX Class B PBOBX Class C PCYBX Class R PBFRX Class Y PICYX Class Z PIBZX [LOGO] PIONEER Investments(R) visit us: us.pioneerinvestments.com Table of Contents Letter to Shareowners 2 Portfolio Management Discussion 4 Portfolio Summary 8 Prices and Distributions 9 Performance Update 10 Comparing Ongoing Fund Expenses 16 Schedule of Investments 18 Financial Statements 58 Notes to Financial Statements 68 Report of Independent Registered Public Accounting Firm 78 Trustees, Officers and Service Providers 79 Pioneer Bond Fund | Annual Report | 6/30/12 1 President's Letter Dear Shareowner, The U.S. economy showed signs of an economic slowdown in the second quarter, reflecting higher savings by consumers and reduced spending by corporations, in large part due to concerns about both the U.S. outlook and the deteriorating situation in Europe. Some 40% - 45% of U.S. corporate earnings come from overseas, with a large portion of that from Europe. While large U.S. corporations generally remain in excellent financial health - cash, borrowing capacity, and margins are all strong - they are holding back on hiring and investments due to concerns about Europe, China, and U.S. regulations, fiscal policies, taxes, and politics. Many investors share those concerns, and are maintaining a cautious approach to the markets. Despite this tough backdrop, the markets had a surprisingly strong first half of 2012. The Standard & Poor's 500 Index returned 9.5% over the six months ended June 30, 2012. In the U.S. bond markets, interest rates generally declined, with riskier sectors faring the best. The broad bond market, as measured by the Barclays Capital Aggregate Bond Index, returned 2.4% during the same six-month period, while the high-yield bond market, as measured by the Bank of America Merrill Lynch High Yield Master II Index, returned 7.1%. Given the major macroeconomic and political issues facing the markets in the second half of the year, we certainly expect continuing volatility. But we also see some positive economic data that give us hope for better news in the second half of 2012. While the unemployment rate remains unacceptably high at over 8%, employment and incomes continue to trend upward. Lower oil prices have acted like an effective tax cut for consumers. Home construction, sales, and refinancings have increased, and auto sales are holding up as well. At Pioneer, we have long advocated the benefits of staying diversified* and investing for the long term. The strategy has generally performed well for many investors. Our advice, as always, is to work closely with a trusted financial advisor to discuss your goals and work together to develop an investment strategy that meets your individual needs. There is no single best strategy that works for every investor. * Diversification does not assure a profit or protect against loss in a declining market. 2 Pioneer Bond Fund | Annual Report | 6/30/12 Pioneer's investment professionals focus on finding good opportunities in both equity and bond markets using the same disciplined investment approach we have used since 1928. Our strategy is to identify undervalued individual securities with the greatest potential for success, carefully weighing risk against reward. Our teams of investment professionals continually monitor and analyze the relative valuations of different sectors and securities globally to help build portfolios that we believe can help you achieve your investment goals. We invite you to learn more about Pioneer and our time-tested approach to investing by consulting with your financial advisor or visiting us online at us.pioneerinvestments.com. We greatly appreciate your trust in us, and we thank you for investing with Pioneer. Sincerely, /s/ Daniel K. Kingsbury Daniel K. Kingsbury President and CEO Pioneer Investment Management USA, Inc. Any information in this shareowner report regarding market or economic trends or the factors influencing the Fund's historical or future performance are statements of opinion as of the date of this report. These statements should not be relied upon for any other purposes. Past performance is no guarantee of future results, and there is no guarantee that market forecasts discussed will be realized. Pioneer Bond Fund | Annual Report | 6/30/12 3 Portfolio Management Discussion | 6/30/12 The bond market delivered generally positive results over the 12 months ended June 30, 2012, although credit-sensitive securities had lagged during the first six months of the period amid concerns about European debt problems and fears of an economic downturn in the U.S. In the following discussion, Kenneth J. Taubes reviews the factors that affected the performance of Pioneer Bond Fund during the 12 months ended June 30, 2012. Mr. Taubes, Chief Investment Officer, U.S., and portfolio manager at Pioneer Investments, is responsible for the daily management of the Fund. Q How did the Fund perform during the 12 months ended June 30, 2012? A Pioneer Bond Fund Class A shares returned 5.91% at net asset value during the 12 months ended June 30, 2012, while the Fund's benchmark, the Barclays Capital Aggregate Bond Index (the Barclays Index), returned 7.47%. During the same period, the average return of the 116 mutual funds in Lipper's Corporate Debt A-rated Funds category was 7.67%. On June 30, 2012, the 30-day standardized SEC yield of the Fund's Class A shares was 3.52% with fees waived, and 3.35% without fees waived. Q How would you describe the investment environment for fixed-income securities during the 12 months ended June 30, 2012? A During the first six months of the period, from July through December 2011, U.S. Treasuries in particular generated solid returns, as investors sought out the perceived safety of Treasuries due to fears about two troubling scenarios: the potential spillover effects of a banking and sovereign-debt crisis in Europe; and the possibility that the U.S. economy might fall back into recession as growth decelerated and energy and fuel costs rose. Corporate bonds did not fare badly during those first six months of the period; they just underperformed Treasuries. Corporate bonds, led by the high-yield sector, returned to favor in the second half of the period, from January through June 2012, when investors' worries somewhat abated about both the European debt situation and a feared "double-dip" recession at home. In Europe, the European Central Bank's (ECB's) more accommodative monetary policy has helped to marginally improve the outlook there, easing financial liquidity problems even as the sovereign-debt problems persist. In the United States, the housing sector has shown progress, while energy costs have declined as domestic energy production has increased. Interest rates also have fallen, which has helped consumers to slightly improve their fiscal situations. While manufacturing growth has slowed a bit, we believe that is mostly due to decreased demand in Europe and Asia. 4 Pioneer Bond Fund | Annual Report | 6/30/12 Q What were your views on the investment environment during the 12 months ended June 30, 2012, and how was the Fund positioned during the period? A We held to a consistent investment view throughout the 12-month period, believing that the U.S. economy was recovering, albeit at a slow pace, and that improvements in the housing sector as well as modest gains in consumer spending would sustain the economic recovery. We believed that government debt, including U.S. Treasuries, was very expensive and didn't offer long-term value, especially given that little or no progress had been made in Washing-ton, D.C., to deal with the nation's debt problem. We thought corporate debt, in particular, was relatively attractive. Corporations generally have been in good financial condition, with improving cash flows that companies have been using to reduce their debt burdens and build up their cash balances. If anything, corporations were under-investing on the growth side during the 12-month period, holding back on expansion plans in light of worries about the debt situation in Europe and concerns about a lack of clarity in U.S. tax and regulatory policies. Consumers in the United States also have generally strengthened their financial positions since the downturn of 2007-08, by reducing personal debt and increasing savings rates. Given all the factors at play during the period, we emphasized corporate bonds and credit-sensitive securities in the Fund's portfolio throughout the 12 months ended June 30, 2012, while underweighting Treasuries and other government agency securities. The Fund's positioning, with its focus on corporate debt, proved to be detrimental to benchmark-relative performance in the first half of the 12-month period, which encompassed the last six months of 2011. Moreover, the underperformance of the Barclays Index during the second half of 2011 was primarily responsible for the Fund's lagging the benchmark over the entire 12-month period ended June 30, 2012, even though the Fund produced very good benchmark-relative results during the final six months of the period (January through June 2012), when corporate bonds again outperformed and the portfolio's overweighted position in the corporate sector supported relative performance. (The Fund's Class A shares at net asset value returned 4.25% during the first six months of 2012, while the Barclays Index returned 2.37%.) At the end of the Fund's fiscal year, on June 30, 2012, the majority of the portfolio's assets were held in investment-grade corporate bonds, mortgage-backed securities and other pass-through debt. Treasuries and government-agency bonds accounted for about 15% of the Fund's net assets, while high-yield, below-investment-grade debt represented another 15% of Pioneer Bond Fund | Annual Report | 6/30/12 5 assets. The effective duration of the Fund's investments was 4.25 years as of June 30, 2012 (duration is a measure of a portfolio's price sensitivity to changes in interest rates), while the average maturity was 7.54 years. Q What types of investments most affected the Fund's performance during the 12 months ended June 30, 2012? A Security selection in all sectors was very good for the Fund's performance during the 12-month period, in Treasuries as well as corporate bonds. Even though we underweighted the portfolio to Treasuries, the Fund's holdings in that asset class tended to have longer maturities, and that helped returns significantly, as long-term Treasuries outperformed for the entire fiscal year ended June 30, 2012. In fact, all of the Fund's top 10 contributors to benchmark-relative performance during the 12-month period were government bonds, principally 30-year Treasuries. Despite good overall security selection, the Fund did own some disappointing investments during the period, including the preferred securities of Forest City, a firm affected by lingering problems in the real estate market; commercial mortgage-backed securities issued by CSFB (Credit Suisse First Boston), the international financial services firm; and securities issued by Alliance Airport Authority, which were unsecured bonds backed by revenues from AMR (the parent of American Airlines), which filed for bankruptcy protection in late 2011. Q What is your investment outlook? A Although the pace of economic growth may have slowed so far this year, the economic recovery is proceeding and we think the expansion will persist. Some key sectors are even showing signs of improvement, with housing a notable example. Moreover, recent declines in energy prices should remove one of the obstacles to growth, while modest gains in employment also should help matters by giving a boost to consumer demand. A growing economy should support continued improvement in the financial health of American corporations and support their ability to meet their debt obligations. At current prices, we believe that corporate debt is attractive relative to other fixed-income investments; and we find high-yield corporate bonds especially attractive. In contrast, after a year of outperformance, we believe Treasuries offer even less relative value than before. When one factors in inflation, short-term and intermediate-term Treasuries are paying negative real yields. Given all the factors discussed here, we think it makes sense to emphasize corporate debt in the portfolio, including high-yield and investment-grade bonds as well as bank loans. 6 Pioneer Bond Fund | Annual Report | 6/30/12 Please refer to the Schedule of Investments on pages 18-57 for a full listing of Fund securities. When interest rates rise, the prices of fixed-income securities in the Fund will generally fall. Conversely, when interest rates fall, the prices of fixed-income securities in the Fund will generally rise. Investments in the Fund are subject to possible loss due to the financial failure of the issuers of the underlying securities and their inability to meet their debt obligations. Prepayment risk is the chance that mortgage-backed bonds will be paid off early if falling interest rates prompt homeowners to refinance their mortgages. Forced to reinvest the unanticipated proceeds at lower interest rates, the Fund would experience a decline in income and lose the opportunity for additional price appreciation associated with falling interest rates. Investments in high-yield or lower-rated securities are subject to greater-than-average risk. The securities issued by U.S. Government-sponsored entities (i.e., Fannie Mae, Freddie Mac) are neither guaranteed nor issued by the U.S. Government. The portfolio may invest in mortgage-backed securities, which during times of fluctuating interest rates may increase or decrease more than other fixed-income securities. At times, the Fund's investments may represent industries or industry sectors that are interrelated or have common risks, making the Fund more susceptible to any economic, political, or regulatory developments or other risks affecting those industries and sectors. These risks may increase share price volatility. Past performance is no guarantee of future results, and there is no guarantee that market forecasts discussed will be realized. Any information in this shareholder report regarding market or economic trends or the factors influencing the Fund's historical or future performance are statements of opinion as of the date of this report. These opinions should not be relied upon for any other purposes. Pioneer Bond Fund | Annual Report | 6/30/12 7 Portfolio Summary | 6/30/12 Portfolio Diversification -------------------------------------------------------------------------------- (As a percentage of total investment portfolio) [THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL] U.S. Corporate Bonds 28.9% U.S. Government Securities 19.8% Collateralized Mortgage Obligations 17.9% International Corporate Bonds 7.5% Municipal Bonds 6.9% Senior Secured Loans 6.5% Asset Backed Securities 5.5% Temporary Cash Investments 3.7% U.S. Preferred Stocks 1.0% Convertible Preferred Stocks 1.0% Foreign Government Bonds 0.8% Convertible Corporate Bonds 0.5% Portfolio Quality -------------------------------------------------------------------------------- (As a percentage of total investment portfolio) [THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL] AAA 35.0% AA 6.2% A 11.4% BBB 28.2% BB 9.2% B 3.7% CCC 1.7% Cash Equivalent 3.4% Not Rated 1.2% Bond ratings are ordered highest to lowest in portfolio. Based on Standard & Poor's measures, AAA (highest possible rating) through BBB are considered investment grade; BB or lower ratings are considered non-investment grade. Cash equivalents and some bonds may not be rated. 10 Largest Holdings -------------------------------------------------------------------------------- (As a percentage of total long-term holdings)* 1. U.S. Treasury Bonds, 4.5%, 8/15/39 0.90% --------------------------------------------------------------------------------------------- 2. U.S. Treasury Bonds, 4.5%, 5/15/38 0.83 --------------------------------------------------------------------------------------------- 3. U.S. Treasury Bonds, 4.25%, 5/15/39 0.73 --------------------------------------------------------------------------------------------- 4. U.S. Treasury Bonds, 4.5%, 2/15/36 0.72 --------------------------------------------------------------------------------------------- 5. U.S. Treasury Notes, 2.75%, 2/15/19 0.71 --------------------------------------------------------------------------------------------- 6. State Street Capital Trust III, Floating Rate Note, 1/29/49 (Perpetual) 0.69 --------------------------------------------------------------------------------------------- 7. U.S. Treasury Notes, 2.125%, 8/15/21 0.61 --------------------------------------------------------------------------------------------- 8. Forest City Enterprises, Inc., 7.0%, 12/31/99 (Perpetual) 0.58 --------------------------------------------------------------------------------------------- 9. Massachusetts Health & Educational Facilities Authority, 5.5%, 11/15/36 0.57 --------------------------------------------------------------------------------------------- 10. Goldman Sachs Capital II, Floating Rate Note, 6/1/43 0.54 --------------------------------------------------------------------------------------------- * This list excludes temporary cash investments and derivative instruments. The Fund is actively managed, and current holdings may be different. The holdings listed should not be considered recommendations to buy or sell any security listed. 8 Pioneer Bond Fund | Annual Report | 6/30/12 Prices and Distributions | 6/30/12 Net Asset Value per Share -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Class 6/30/12 6/30/11 -------------------------------------------------------------------------------- A $9.73 $9.66 -------------------------------------------------------------------------------- B $9.67 $9.60 -------------------------------------------------------------------------------- C $9.63 $9.55 -------------------------------------------------------------------------------- R $9.82 $9.74 -------------------------------------------------------------------------------- Y $9.65 $9.57 -------------------------------------------------------------------------------- Z $9.76 $9.68 -------------------------------------------------------------------------------- Distributions per Share: 7/1/11-6/30/12 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Net Investment Short-Term Long-Term Class Income Capital Gains Capital Gains -------------------------------------------------------------------------------- A $0.4349 $ -- $0.0499 -------------------------------------------------------------------------------- B $0.3318 $ -- $0.0499 -------------------------------------------------------------------------------- C $0.3472 $ -- $0.0499 -------------------------------------------------------------------------------- R $0.3993 $ -- $0.0499 -------------------------------------------------------------------------------- Y $0.4530 $ -- $0.0499 -------------------------------------------------------------------------------- Z $0.4551 $ -- $0.0499 -------------------------------------------------------------------------------- Index Definition -------------------------------------------------------------------------------- The Barclays Capital Aggregate Bond Index is a measure of the U.S. bond market. Index returns are calculated monthly, assume reinvestment of dividends and, unlike Fund returns, do not reflect any fees, expenses or sales charges. It is not possible to invest directly in an index. The index defined here pertains to the "Value of $10,000 Investment" and "Value of $5 Million Investment" charts on pages 10-15. Pioneer Bond Fund | Annual Report | 6/30/12 9 Performance Update | 6/30/12 Class A Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Pioneer Bond Fund at public offering price, compared to that of the Barclays Capital Aggregate Bond Index. Average Annual Total Returns (As of June 30, 2012) -------------------------------------------------------------------------------- Net Asset Public Offering Period Value (NAV) Price (POP) -------------------------------------------------------------------------------- 10 Years 6.22% 5.73% 5 Years 7.32 6.34 1 Year 5.91 1.09 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated November 1, 2011) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 1.06% 0.85% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Barclays Capital Bond Fund Aggregate Bond Index 6/30/2002 $ 9,550 $ 10,000 6/30/2003 $ 10,636 $ 11,040 6/30/2004 $ 10,953 $ 11,075 6/30/2005 $ 11,791 $ 11,829 6/30/2006 $ 11,644 $ 11,733 6/30/2007 $ 12,262 $ 12,452 6/30/2008 $ 13,076 $ 13,339 6/30/2009 $ 13,422 $ 14,145 6/30/2010 $ 15,396 $ 15,489 6/30/2011 $ 16,486 $ 16,093 6/30/2012 $ 17,460 $ 17,296 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. NAV results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. POP returns reflect deduction of maximum 4.50% sales charge. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The net expense ratio reflects the contractual expense limitation currently in effect through November 1, 2013, for Class A shares. There can be no assurance that Pioneer will extend the expense limitation beyond such time. Please see the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. 10 Pioneer Bond Fund | Annual Report | 6/30/12 Performance Update | 6/30/12 Class B Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Pioneer Bond Fund, compared to that of the Barclays Capital Aggregate Bond Index. Average Annual Total Returns (As of June 30, 2012) -------------------------------------------------------------------------------- If If Period Held Redeemed -------------------------------------------------------------------------------- 10 Years 5.21% 5.21% 5 Years 6.25 6.25 1 Year 4.82 0.82 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated November 1, 2011) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 1.95% 1.90% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Barclays Capital Bond Fund Aggregate Bond Index 6/30/2002 $ 10,000 $ 10,000 6/30/2003 $ 11,044 $ 11,040 6/30/2004 $ 11,270 $ 11,075 6/30/2005 $ 12,027 $ 11,829 6/30/2006 $ 11,769 $ 11,733 6/30/2007 $ 12,271 $ 12,452 6/30/2008 $ 12,970 $ 13,339 6/30/2009 $ 13,180 $ 14,145 6/30/2010 $ 14,955 $ 15,489 6/30/2011 $ 15,850 $ 16,093 6/30/2012 $ 16,614 $ 17,296 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. "If Held" results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. "If Redeemed" returns reflect the deduction of applicable contingent deferred sales charge (CDSC). The maximum CDSC for Class B shares is 4% and declines over five years. For more complete information, please see the prospectus. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. Please see the prospectus and financial statements for more information. The net expense ratio reflects the contractual expense limitation currently in effect through November 1, 2013, for Class B shares. There can be no assurance that Pioneer will extend the expense limitation beyond such time. Please see the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. Pioneer Bond Fund | Annual Report | 6/30/12 11 Performance Update | 6/30/12 Class C Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Pioneer Bond Fund, compared to that of the Barclays Capital Aggregate Bond Index. Average Annual Total Returns (As of June 30, 2012) -------------------------------------------------------------------------------- If If Period Held Redeemed -------------------------------------------------------------------------------- 10 Years 5.28% 5.28% 5 Years 6.37 6.37 1 Year 5.12 5.12 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated November 1, 2011) -------------------------------------------------------------------------------- Gross -------------------------------------------------------------------------------- 1.73% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Barclays Capital Bond Fund Aggregate Bond Index 6/30/2002 $ 10,000 $ 10,000 6/30/2003 $ 11,028 $ 11,040 6/30/2004 $ 11,261 $ 11,075 6/30/2005 $ 12,013 $ 11,829 6/30/2006 $ 11,763 $ 11,733 6/30/2007 $ 12,279 $ 12,452 6/30/2008 $ 12,990 $ 13,339 6/30/2009 $ 13,201 $ 14,145 6/30/2010 $ 15,000 $ 15,489 6/30/2011 $ 15,910 $ 16,093 6/30/2012 $ 16,724 $ 17,296 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Class C shares held for less than one year are also subject to a 1% contingent deferred sales charge (CDSC). The performance shown for Class C shares does not reflect the 1% front-end sales charge in effect prior to February 1, 2004. If you paid a 1% sales charge, your returns would be lower than those shown above. "If Held" results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. 12 Pioneer Bond Fund | Annual Report | 6/30/12 Performance Update | 6/30/12 Class R Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Pioneer Bond Fund, compared to that of the Barclays Capital Aggregate Bond Index. Average Annual Total Returns (As of June 30, 2012) -------------------------------------------------------------------------------- If If Period Held Redeemed -------------------------------------------------------------------------------- 10 Years 5.92% 5.92% 5 Years 6.92 6.92 1 Year 5.58 5.58 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated November 1, 2011) -------------------------------------------------------------------------------- Gross -------------------------------------------------------------------------------- 1.24% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Barclays Capital Bond Fund Aggregate Bond Index 6/30/2002 $ 10,000 $ 10,000 6/30/2003 $ 11,100 $ 11,040 6/30/2004 $ 11,454 $ 11,075 6/30/2005 $ 12,287 $ 11,829 6/30/2006 $ 12,111 $ 11,733 6/30/2007 $ 12,722 $ 12,452 6/30/2008 $ 13,505 $ 13,339 6/30/2009 $ 13,822 $ 14,145 6/30/2010 $ 15,781 $ 15,489 6/30/2011 $ 16,834 $ 16,093 6/30/2012 $ 17,773 $ 17,296 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. The performance shown for Class R shares for the period prior to the commencement of operations of Class R shares on April 1, 2003, is based on the performance of Class A shares, reduced to reflect the higher distribution and service fees of Class R shares. For the period beginning on April 1, 2003, the actual performance of Class R shares is reflected. The performance shown for Class R shares does not reflect the 1% CDSC that was in effect prior to July 1, 2004. Class R shares are not subject to sales charges and are available for limited groups of eligible investors, including institutional investors. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. Pioneer Bond Fund | Annual Report | 6/30/12 13 Performance Update | 6/30/12 Class Y Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $5 million investment made in Pioneer Bond Fund, compared to that of the Barclays Capital Aggregate Bond Index. Average Annual Total Returns (As of June 30, 2012) -------------------------------------------------------------------------------- If If Period Held Redeemed -------------------------------------------------------------------------------- 10 Years 6.59% 6.59% 5 Years 7.62 7.62 1 Year 6.27 6.27 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated November 1, 2011) -------------------------------------------------------------------------------- Gross -------------------------------------------------------------------------------- 0.61% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $5 Million Investment Pioneer Barclays Capital Bond Fund Aggregate Bond Index 6/30/2002 $ 5,000,000 $ 5,000,000 6/30/2003 $ 5,593,202 $ 5,520,034 6/30/2004 $ 5,787,650 $ 5,537,694 6/30/2005 $ 6,254,570 $ 5,914,342 6/30/2006 $ 6,206,036 $ 5,866,705 6/30/2007 $ 6,556,850 $ 6,225,787 6/30/2008 $ 7,010,174 $ 6,669,259 6/30/2009 $ 7,216,970 $ 7,072,540 6/30/2010 $ 8,303,809 $ 7,744,311 6/30/2011 $ 8,905,886 $ 8,046,450 6/30/2012 $ 9,464,527 $ 8,647,817 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Performance shown for periods prior to the inception of the Fund's Class Y shares on September 20, 2001, reflects the NAV performance of the Fund's Class A shares. The performance does not reflect differences in expenses, including the Rule 12b-1 fees applicable to Class A shares. Since fees for Class A shares are generally higher than those of Class Y shares, the performance for Class Y shares prior to their inception would have been higher than that shown. Class Y shares are not subject to sales charges and are available for limited groups of eligible investors, including institutional investors. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. 14 Pioneer Bond Fund | Annual Report | 6/30/12 Performance Update | 6/30/12 Class Z Shares Investment Returns -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Pioneer Bond Fund, compared to that of the Barclays Capital Aggregate Bond Index. Average Annual Total Returns (As of June 30, 2012) -------------------------------------------------------------------------------- If If Period Held Redeemed -------------------------------------------------------------------------------- 10 Years 6.28% 6.28% 5 Years 7.66 7.66 1 Year 6.23 6.23 -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated November 1, 2011) -------------------------------------------------------------------------------- Gross Net -------------------------------------------------------------------------------- 0.72% 0.65% -------------------------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Barclays Capital Bond Fund Aggregate Bond Index 6/30/2002 $ 10,000 $ 10,000 6/30/2003 $ 11,138 $ 11,040 6/30/2004 $ 11,471 $ 11,075 6/30/2005 $ 12,348 $ 11,829 6/30/2006 $ 12,194 $ 11,733 6/30/2007 $ 12,714 $ 12,452 6/30/2008 $ 13,602 $ 13,339 6/30/2009 $ 14,067 $ 14,145 6/30/2010 $ 16,132 $ 15,489 6/30/2011 $ 17,310 $ 16,093 6/30/2012 $ 18,387 $ 17,296 Call 1-800-225-6292 or visit us.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Performance shown for periods prior to the inception of Class Z shares on July 6, 2007, reflects the NAV performance of the Fund's Class A shares. The performance does not reflect differences in expenses, including the Rule 12b-1 fees applicable to Class A shares. Since fees for Class A shares are generally higher than those of Class Z shares, the performance for Class Z shares prior to their inception on July 6, 2007 would have been higher than that shown. Class Z shares are not subject to sales charges and are available for limited groups of eligible investors, including institutional investors. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The net expense ratio reflects the contractual expense limitation currently in effect through November 1, 2013, for Class Z shares. There can be no assurance that Pioneer will extend the expense limitation beyond such time. Please see the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. Pioneer Bond Fund | Annual Report | 6/30/12 15 Comparing Ongoing Fund Expenses As a shareowner in the Fund, you incur two types of costs: (1) ongoing costs, including management fees, distribution and/or service (12b-1) fees, and other Fund expenses; and (2) transaction costs, including sales charges (loads) on purchase payments. This example is intended to help you understand your ongoing expenses (in dollars) of investing in the Fund and to compare these costs with the ongoing costs of investing in other mutual funds. The example is based on an investment of $1,000 at the beginning of the Fund's latest six-month period and held throughout the six months. Using the Tables -------------------------------------------------------------------------------- Actual Expenses The first table below provides information about actual account values and actual expenses.You may use the information in this table,together with the amount you invested,to estimate the expenses that you paid over the period as follows: (1) Divide your account value by $1,000 Example: an $8,600 account value (divided by) $1,000 = 8.6 (2) Multiply the result in (1) above by the corresponding share class's number in the third row under the heading entitled "Expenses Paid During Period" to estimate the expenses you paid on your account during this period. Expenses Paid on a $1,000 Investment in Pioneer Bond Fund Based on actual returns from January 1, 2012 through June 30, 2012. ----------------------------------------------------------------------------------------------------- Share Class A B C R Y Z ----------------------------------------------------------------------------------------------------- Beginning Account $1,000.00 $1,000.00 $1,000.00 $1,000.00 $1,000.00 $1,000.00 Value on 1/1/12 ----------------------------------------------------------------------------------------------------- Ending Account Value $1,059.10 $1,048.20 $1,051.20 $1,055.80 $1,062.70 $1,062.30 (after expenses) on 6/30/12 ----------------------------------------------------------------------------------------------------- Expenses Paid $4.32 $9.62 $8.77 $6.34 $3.30 $3.30 During Period* ----------------------------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized expense ratio of 0.85%, 1.90%, 1.73%, 1.25%, 0.65%, and 0.65% for Class A, Class B, Class C, Class R, Class Y, and Class Z shares, respectively, multiplied by the average account value over the period, multiplied by 182/366 (to reflect the one-half year period). 16 Pioneer Bond Fund | Annual Report | 6/30/12 Hypothetical Example for Comparison Purposes The table below provides information about hypothetical account values and hypothetical expenses based on the Fund's actual expense ratio and an assumed rate of return of 5% per year before expenses,which is not the Fund's actual return.The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period.You may use this information to compare the ongoing costs of investing in the Fund and other funds.To do so,compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds. Please note that the expenses shown in the tables are meant to highlight your ongoing costs only and do not reflect any transaction costs,such as sales charges (loads) that are charged at the time of the transaction. Therefore,the table below is useful in comparing ongoing costs only and will not help you determine the relative total costs of owning different funds.In addition,if these transaction costs were included,your costs would have been higher. Expenses Paid on a $1,000 Investment in Pioneer Bond Fund Based on a hypothetical 5% per year return before expenses,reflecting the period from January 1, 2012 through June 30, 2012. --------------------------------------------------------------------------------------------------- Share Class A B C R Y Z --------------------------------------------------------------------------------------------------- Beginning Account $1,000.00 $1,000.00 $1,000.00 $1,000.00 $1,000.00 $1,000.00 Value on 1/1/12 --------------------------------------------------------------------------------------------------- Ending Account Value $1,020.64 $1,015.42 $1,016.26 $1,018.65 $1,021.63 $1,021.63 (after expenses) on 6/30/12 --------------------------------------------------------------------------------------------------- Expenses Paid $4.27 $9.52 $8.67 $6.27 $3.27 $3.27 During Period* --------------------------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized expense ratio of 0.85%, 1.90%, 1.73%, 1.25%, 0.65%, and 0.65% for Class A, Class B, Class C, Class R, Class Y, and Class Z shares, respectively, multiplied by the average account value over the period, multiplied by 182/366 (to reflect the one-half year period). Pioneer Bond Fund | Annual Report | 6/30/12 17 Schedule of Investments | 6/30/12 ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate(b) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- CONVERTIBLE CORPORATE BONDS -- 0.6% ENERGY -- 0.2% Coal & Consumable Fuels -- 0.2% 2,680,000 BB-/NR Alpha Appalachia Holdings, Inc., 3.25%, 8/1/15 $ 2,311,500 -------------- Total Energy $ 2,311,500 ------------------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 0.0%+ Health Care Services -- 0.0%+ 766,000 B+/B2 Omnicare, Inc., 3.25%, 12/15/35 $ 728,658 -------------- Total Health Care Equipment & Services $ 728,658 ------------------------------------------------------------------------------------------------------- SEMICONDUCTORS & SEMICONDUCTOR EQUIPMENT -- 0.4% Semiconductors -- 0.4% 4,725,000 A-/NR Intel Corp., 2.95%, 12/15/35 $ 5,345,156 -------------- Total Semiconductors & Semiconductor Equipment $ 5,345,156 ------------------------------------------------------------------------------------------------------- TOTAL CONVERTIBLE CORPORATE BONDS (Cost $7,394,300) $ 8,385,314 ------------------------------------------------------------------------------------------------------- Shares Value ------------------------------------------------------------------------------------------------------- PREFERRED STOCKS -- 1.1% BANKS -- 0.6% Diversified Banks -- 0.6% 64,000 6.50 BBB+/A3 US Bancorp, Floating Rate Note, 12/31/99 (Perpetual) $ 1,829,120 235,000 6.00 BBB+/A3 US Bancorp, Floating Rate Note, 12/31/99 (Perpetual) 6,434,300 -------------- $ 8,263,420 -------------- Total Banks $ 8,263,420 ------------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 0.2% Other Diversified Financial Services -- 0.2% 116,000 7.88 BB/Ba2 Citigroup Capital XIII, Floating Rate Note, 10/30/40 $ 3,165,640 -------------- Total Diversified Financials $ 3,165,640 ------------------------------------------------------------------------------------------------------- INSURANCE -- 0.3% Life & Health Insurance -- 0.3% 153,800 7.38 BB+/Baa3 Delphi Financial Group, Inc., Floating Rate Note, 5/15/37 $ 3,787,325 -------------- Total Insurance $ 3,787,325 ------------------------------------------------------------------------------------------------------- TOTAL PREFERRED STOCKS (Cost $14,584,620) $ 15,216,385 ------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 18 Pioneer Bond Fund | Annual Report | 6/30/12 ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Rate(b) Ratings Shares (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- CONVERTIBLE PREFERRED STOCKS -- 1.0% BANKS -- 0.4% Diversified Banks -- 0.4% 5,610 BBB+/Ba1 Wells Fargo & Co., 7.5%, 12/31/99 (Perpetual) $ 6,311,250 -------------- Total Banks $ 6,311,250 ------------------------------------------------------------------------------------------------------- REAL ESTATE -- 0.6% Real Estate Operating Companies -- 0.6% 150,400 CCC+/Caa2 Forest City Enterprises, Inc., 7.0%, 12/31/99 (Perpetual) $ 7,961,800 -------------- Total Real Estate $ 7,961,800 ------------------------------------------------------------------------------------------------------- TOTAL CONVERTIBLE PREFERRED STOCKS (Cost $13,939,199) $ 14,273,050 ------------------------------------------------------------------------------------------------------- Principal Amount ($) ------------------------------------------------------------------------------------------------------- ASSET BACKED SECURITIES -- 5.5% MATERIALS -- 0.2% Precious Metals & Minerals -- 0.1% 700,000 NR/B1 Credit-Based Asset Servicing and Securitization LLC, 6.25%, 10/25/36 (Step) (144A) $ 678,181 1,165,843 0.95 AA+/Aa2 Credit-Based Asset Servicing and Securitization LLC, Floating Rate Note, 5/25/50 (144A) 1,137,029 -------------- $ 1,815,210 ------------------------------------------------------------------------------------------------------- Paper Products -- 0.1% 800,000 1.54 AAA/Aaa Chase Issuance Trust, Floating Rate Note, 8/15/15 $ 811,831 -------------- Total Materials $ 2,627,041 ------------------------------------------------------------------------------------------------------- COMMERCIAL SERVICES & SUPPLIES -- 0.1% Research & Consulting Services -- 0.1% 713,333 A/NR TAL Advantage LLC, 4.31%, 5/20/26 (144A) $ 719,388 -------------- Total Commercial Services & Supplies $ 719,388 ------------------------------------------------------------------------------------------------------- AUTOMOBILES & COMPONENTS -- 0.4% Automobile Manufacturers -- 0.4% 500,000 NR/Aa3 AmeriCredit Automobile Receivables Trust, 4.04%, 7/10/17 $ 527,233 650,000 AA-/Aa2 AmeriCredit Automobile Receivables Trust, 4.2%, 11/8/16 686,682 402,461 A/NR Santander Drive Auto Receivables Trust, 1.89%, 5/15/17 (144A) 399,283 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/12 19 Schedule of Investments | 6/30/12 (continued) ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate(b) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- Automobile Manufacturers -- (continued) 1,350,000 NR/Aa1 Santander Drive Auto Receivables Trust, 2.66%, 1/15/16 $ 1,371,735 1,635,366 BBB/NR Santander Drive Auto Receivables Trust, 3.35%, 6/15/17 (144A) 1,635,366 1,300,000 A/A1 Santander Drive Auto Receivables Trust, 3.78%, 11/15/17 1,337,725 -------------- $ 5,958,024 -------------- Total Automobiles & Components $ 5,958,024 ------------------------------------------------------------------------------------------------------- BANKS -- 2.7% Diversified Banks -- 0.1% 874,567 0.34 NR/Aa1 Wells Fargo Home Equity Trust, Floating Rate Note, 4/25/37 $ 852,915 ------------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- 2.6% 428,800 1.33 AAA/A1 Accredited Mortgage Loan Trust, Floating Rate Note, 10/25/34 $ 377,821 180,171 0.34 BBB/Ba3 Accredited Mortgage Loan Trust, Floating Rate Note, 2/25/37 180,297 1,059,554 0.43 AA/B2 ACE Securities Corp., Floating Rate Note, 3/25/36 967,842 1,434,573 6.50 BBB+/A2 ACE Securities Corp., Floating Rate Note, 8/15/30 (144A) 1,497,010 1,359,485 NR/A1 Bombardier Capital Mortgage Securitization Corp., 6.65%, 4/15/28 1,429,432 2,045,140 AA/NR CarNow Auto Receivables Trust, 2.09%, 1/15/15 (144A) 2,045,139 310,276 0.98 AA/Aa1 Carrington Mortgage Loan Trust, Floating Rate Note, 2/25/35 301,811 268,755 0.65 AAA/Baa3 Carrington Mortgage Loan Trust, Floating Rate Note, 9/25/35 258,202 523,803 AAA/B2 Citicorp Residential Mortgage Securities, Inc., 5.775%, 9/25/36 (Step) 508,297 1,700,000 A/B2 Citicorp Residential Mortgage Securities, Inc., 5.892%, 3/25/37 (Step) 1,643,154 2,791,000 A/B1 Citicorp Residential Mortgage Securities, Inc., 5.939%, 7/25/36 (Step) 2,655,268 797,069 0.52 AA+/A2 Citigroup Mortgage Loan Trust, Inc., Floating Rate Note, 1/25/36 751,321 597,686 0.35 BBB/Baa3 Citigroup Mortgage Loan Trust, Inc., Floating Rate Note, 1/25/37 595,224 532,276 0.66 AA+/Aa1 Citigroup Mortgage Loan Trust, Inc., Floating Rate Note, 7/25/35 523,257 246,773 1.15 A-/Ba2 Citigroup Mortgage Loan Trust, Inc., Floating Rate Note, 7/25/37 243,184 1,137,851 4.00 NR/NR Conn Funding II LP, Floating Rate Note, 4/15/16 (144A) 1,135,006 The accompanying notes are an integral part of these financial statements. 20 Pioneer Bond Fund | Annual Report | 6/30/12 ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate(b) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 2,094,682 5.07 AAA/B2 Countrywide Asset-Backed Certificates, Floating Rate Note, 2/25/36 $ 1,974,238 1,333,745 0.59 BBB/Baa3 Countrywide Home Equity Loan Trust, Floating Rate Note, 11/15/28 1,284,468 368,373 0.79 AAA/NR First Franklin Mortgage Loan Asset Backed Certificates, Floating Rate Note, 9/25/34 358,154 4,700,000 0.65 AAA/Aa2 First NLC Trust, Floating Rate Note, 9/25/35 4,381,998 96,889 0.36 A/A2 Fremont Home Loan Trust, Floating Rate Note, 2/25/36 96,561 1,499,894 0.71 AA+/Aa1 Fremont Home Loan Trust, Floating Rate Note, 6/25/35 1,469,707 407,563 0.89 A/A2 GSAMP Trust, Floating Rate Note, 3/25/35 387,035 19,252 0.62 AAA/Aaa GSAMP Trust, Floating Rate Note, 7/25/45 19,223 380,679 0.63 AAA/Aa1 GSAMP Trust, Floating Rate Note, 9/25/35 376,148 1,200,000 AA/NR Leaf II Receivables Funding LLC, 4.9%, 2/20/22 (144A) 1,195,920 454,256 BBB+/Baa1 Lehman ABS Manufactured Housing Contract Trust, 5.873%, 4/15/40 473,479 4,903,715 CCC+/Caa3 Local Insight Media Finance LLC, 5.88%, 10/23/37 (144A) 1,961,486 2,200,000 2.50 BBB+/Baa3 Madison Avenue Manufactured Housing Contract, Floating Rate Note, 3/25/32 2,025,959 867,238 A/NR Mid-State Trust, 5.25%, 12/15/45 (144A) 889,047 330,691 0.31 CCC/Ba3 Morgan Stanley ABS Capital I, Floating Rate Note, 12/25/36 179,264 30,075 0.30 CCC/Caa2 Morgan Stanley IXIS Real Estate Capital Trust, Floating Rate Note, 11/25/36 9,809 983,442 0.51 AAA/Aa3 Option One Mortgage Loan Trust, Floating Rate Note, 11/25/35 940,733 201,791 0.37 BBB/Aa3 Option One Mortgage Loan Trust, Floating Rate Note, 2/25/38 200,030 816,779 5.91 AA/A3 Origen Manufactured Housing, Floating Rate Note, 1/15/35 859,921 484,000 5.46 AAA/Aa3 Origen Manufactured Housing, Floating Rate Note, 11/15/35 513,319 726,767 NR/A2 Oxford Finance Funding Trust, 3.9%, 3/15/17 (144A) 727,676 1,313,246 0.69 AA+/A3 RASC Trust, Floating Rate Note, 8/25/35 1,260,209 19,288 0.36 BB/Ba3 RASC Trust, Floating Rate Note, 8/25/36 19,267 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/12 21 Schedule of Investments | 6/30/12 (continued) ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate(b) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 1,400,000 A/NR SNAAC Auto Receivables Trust, 3.11%, 6/15/17 (144A) $ 1,399,860 -------------- $ 38,115,776 -------------- Total Banks $ 38,968,691 ------------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 2.1% Other Diversified Financial Services -- 0.6% 154,592 0.69 AA/Aa2 Asset Backed Securities Corp. Home Equity, Floating Rate Note, 4/25/35 $ 151,552 1,000,000 AA/NR DT Auto Owner Trust, 2.26%, 10/16/17 (144A) 1,000,078 1,399,143 A/NR DT Auto Owner Trust, 3.46%, 1/15/14 (144A) 1,400,945 1,400,000 BBB/NR DT Auto Owner Trust, 4.89%, 1/17/17 (144A) 1,412,039 278,935 NR/NR DT Auto Owner Trust, 5.92%, 10/15/15 (144A) 281,417 530,239 1.25 B/B1 Ellington Loan Acquisition Trust, Floating Rate Note, 5/26/37 (144A) 524,156 355,260 1.05 B/B1 Ellington Loan Acquisition Trust, Floating Rate Note, 5/27/37 (144A) 349,400 1,815,256 0.66 AAA/Aaa Home Equity Asset Trust, Floating Rate Note, 11/25/35 1,782,781 270,030 0.49 AAA/A1 JP Morgan Mortgage Acquisition Corp., Floating Rate Note, 12/25/35 251,808 800,000 A/NR Prestige Auto Receivables Trust, 3.9%, 7/16/18 (144A) 814,270 1,081,667 A-/NR Textainer Marine Containers, Ltd., 4.21%, 4/15/27 (144A) 1,089,525 -------------- $ 9,057,971 ------------------------------------------------------------------------------------------------------- Specialized Finance -- 0.9% 964,464 NR/Aaa 321 Henderson Receivables I LLC, 3.82%, 12/15/48 (144A) $ 982,547 2,358,267 0.52 AA/Baa3 Aegis Asset Backed Securities Trust, Floating Rate Note, 12/25/35 2,035,019 4,956,344 BBB+/Baa1 Dominos Pizza Master Issuer LLC, 5.216%, 1/25/42 (144A) 5,168,291 1,737,766 NR/Baa1 Irwin Home Equity Corp., 5.32%, 6/25/35 (Step) 1,677,120 800,000 0.95 A/A2 Irwin Home Equity Corp., Floating Rate Note, 4/25/30 667,063 149,091 0.68 AA+/Aa1 Mastr Asset Backed Securities Trust, Floating Rate Note, 5/25/35 146,522 908,073 0.60 AAA/Aaa New Century Home Equity Loan Trust, Floating Rate Note, 3/25/35 842,935 The accompanying notes are an integral part of these financial statements. 22 Pioneer Bond Fund | Annual Report | 6/30/12 ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate(b) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- Specialized Finance -- (continued) 1,552,396 0.51 NR/Aaa New Century Home Equity Loan Trust, Floating Rate Note, 6/25/35 $ 1,542,576 -------------- $ 13,062,073 ------------------------------------------------------------------------------------------------------- Consumer Finance -- 0.3% 2,500,000 0.30 AAA/Aaa MBNA Credit Card Master Note Trust, Floating Rate Note, 10/15/15 $ 2,499,985 900,000 1.22 AAA/Aaa SLM Student Loan Trust, Floating Rate Note, 4/27/26 (144A) 871,011 -------------- $ 3,370,996 ------------------------------------------------------------------------------------------------------- Asset Management & Custody Banks -- 0.3% 3,282,961 AA-/Aa3 Terwin Mortgage Trust, 4.534%, 9/25/36 (Step) $ 3,121,324 1,279,250 A/NR Triton Container Finance LLC, 4.21%, 5/14/27 (144A) 1,284,367 -------------- $ 4,405,691 -------------- Total Diversified Financials $ 29,896,731 ------------------------------------------------------------------------------------------------------- TOTAL ASSET BACKED SECURITIES (Cost $80,914,817) $ 78,169,875 ------------------------------------------------------------------------------------------------------- COLLATERALIZED MORTGAGE OBLIGATIONS -- 17.7% CONSUMER SERVICES -- 0.1% Hotels, Resorts & Cruise Lines -- 0.1% 800,000 NR/Baa3 S2 Hospitality LLC, 4.5%, 4/15/25 (144A) $ 803,830 -------------- Total Consumer Services $ 803,830 ------------------------------------------------------------------------------------------------------- BANKS -- 11.9% Thrifts & Mortgage Finance -- 11.9% 2,264,940 NR/Ba3 Banc of America Alternative Loan Trust, 5.0%, 7/25/19 $ 2,318,748 1,286,214 NR/B2 Banc of America Alternative Loan Trust, 5.25%, 5/25/34 1,310,450 1,576,278 NR/Ba1 Banc of America Alternative Loan Trust, 5.5%, 1/25/20 1,605,480 1,468,869 NR/B1 Banc of America Alternative Loan Trust, 5.5%, 11/25/19 1,489,497 2,217,699 NR/Baa2 Banc of America Alternative Loan Trust, 5.5%, 9/25/33 2,257,871 1,133,421 AAA/Baa2 Banc of America Alternative Loan Trust, 5.75%, 4/25/33 1,192,657 2,150,945 NR/Ba2 Banc of America Alternative Loan Trust, 6.0%, 3/25/34 2,219,954 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/12 23 Schedule of Investments | 6/30/12 (continued) ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate(b) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 1,685,636 B-/NR Banc of America Funding Corp., 5.5%, 1/25/36 $ 1,663,338 1,792,936 0.37 BB-/A Banc of America Funding Corp., Floating Rate Note, 8/26/36 (144A) 1,667,072 8,962,723 NR/Caa2 Bayview Commercial Asset Trust, 3.855%, 9/25/37 (Step) (144A) (c) 829,052 1,303,278 0.61 AAA/Aa3 Bayview Commercial Asset Trust, Floating Rate Note, 4/25/34 (144A) 1,077,193 13,370,128 4.70 NR/Caa2 Bayview Commercial Asset Trust, Floating Rate Note, 7/25/37 (144A) (c) 881,091 417,713 3.00 NR/NR BCAP LLC Trust, Floating Rate Note, 6/27/36 (144A) 418,477 1,889,463 2.33 AAA/Baa2 Bear Stearns Adjustable Rate Mortgage Trust, Floating Rate Note, 8/25/33 1,831,651 472,570 AAA/Baa1 Chase Mortgage Finance Corp., 5.0%, 10/25/33 489,038 1,500,000 0.41 BBB+/Aa2 Citigroup Commercial Mortgage Trust, Floating Rate Note, 4/15/22 (144A) 1,386,226 3,500,000 NR/Aaa Commercial Mortgage Pass Through Certificates, 4.063%, 12/10/44 3,536,634 150,000 NR/Baa3 Commercial Mortgage Pass Through Certificates, 5.949%, 6/9/28 (144A) 151,888 645,185 0.54 AAA/Aaa Commercial Mortgage Pass Through Certificates, Floating Rate Note, 11/15/17 (144A) 612,315 1,377,109 0.58 AAA/Aaa Commercial Mortgage Pass Through Certificates, Floating Rate Note, 11/15/17 (144A) 1,279,407 1,080,803 0.42 A+/A1 Commercial Mortgage Pass Through Certificates, Floating Rate Note, 6/15/22 (144A) 1,027,148 830,256 AAA/Ba2 Countrywide Alternative Loan Trust, 4.25%, 4/25/34 837,217 1,158,779 AAA/B2 Countrywide Alternative Loan Trust, 4.75%, 10/25/33 1,180,394 1,338,009 AAA/Ba1 Countrywide Alternative Loan Trust, 5.125%, 3/25/34 1,360,774 1,209,982 BB/B2 Countrywide Alternative Loan Trust, 5.5%, 1/25/35 1,232,533 6,308,285 CCC/NR Countrywide Alternative Loan Trust, 5.5%, 4/25/35 3,220,165 1,765,968 BB/NR Countrywide Alternative Loan Trust, 5.5%, 8/25/34 1,747,206 1,866,276 AAA/NR Countrywide Alternative Loan Trust, 5.75%, 12/25/33 1,924,485 The accompanying notes are an integral part of these financial statements. 24 Pioneer Bond Fund | Annual Report | 6/30/12 ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate(b) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 1,227,258 0.70 B-/NR Countrywide Alternative Loan Trust, Floating Rate Note, 8/25/18 $ 1,150,158 388,808 BB-/NR Countrywide Home Loan Mortgage Pass Through Trust, 5.25%, 1/25/35 391,257 1,593,968 4.81 AAA/Ba1 Countrywide Home Loan Mortgage Pass Through Trust, Floating Rate Note, 12/25/33 1,529,255 500,427 0.61 AAA/Aa3 Downey Savings & Loan Association Mortgage Loan Trust, Floating Rate Note, 7/19/44 390,935 1,250,000 A/A2 Extended Stay America Trust, 4.86%, 11/5/27 (144A) 1,263,722 577,713 CCC/NR First Horizon Asset Securities, Inc., 6.0%, 5/25/36 555,962 402,702 5.71 NR/Baa1 First Horizon Asset Securities, Inc., Floating Rate Note, 10/25/34 403,867 569,068 2.62 AAA/B1 First Horizon Asset Securities, Inc., Floating Rate Note, 4/25/35 541,867 3,375,000 AAA/NR GMAC Commercial Mortgage Securities, Inc., 4.864%, 12/10/41 3,594,274 800,000 5.31 A/A2 GMAC Commercial Mortgage Securities, Inc., Floating Rate Note, 4/10/40 780,598 1,250,000 NR/Aaa GS Mortgage Securities Corp. II, 3.377%, 5/10/45 1,276,618 900,000 NR/Aaa GS Mortgage Securities Corp. II, 5.56%, 11/10/39 1,022,405 1,770,000 NR/Aa3 GS Mortgage Securities Corp. II, 5.591%, 11/10/39 1,837,961 2,000,000 1.26 AAA/Aaa GS Mortgage Securities Corp. II, Floating Rate Note, 3/6/20 (144A) 1,972,894 700,000 2.20 AA/NR GS Mortgage Securities Corp. II, Floating Rate Note, 3/6/20 (144A) 692,982 439,453 2.76 BBB-/NR GSR Mortgage Loan Trust, Floating Rate Note, 1/25/35 385,489 292,944 5.74 BB-/NR GSR Mortgage Loan Trust, Floating Rate Note, 2/25/34 248,295 963,395 3.06 AAA/B1 GSR Mortgage Loan Trust, Floating Rate Note, 6/25/34 950,195 1,870,058 2.75 AAA/NR GSR Mortgage Loan Trust, Floating Rate Note, 8/25/33 1,793,389 937,474 0.97 AAA/A1 Impac CMB Trust, Floating Rate Note, 10/25/34 780,167 667,667 1.05 AAA/Aaa Impac Secured Assets CMN Owner Trust, Floating Rate Note, 11/25/34 637,155 1,053,580 0.60 AAA/Aaa Impac Secured Assets CMN Owner Trust, Floating Rate Note, 5/25/36 1,000,982 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/12 25 Schedule of Investments | 6/30/12 (continued) ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate(b) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 791,547 0.60 AAA/Aaa Impac Secured Assets CMN Owner Trust, Floating Rate Note, 8/25/36 $ 757,546 1,600,000 AAA/NR JP Morgan Chase Commercial Mortgage Securities Corp., 3.616%, 11/15/43 (144A) 1,697,766 1,350,000 NR/Aaa JP Morgan Chase Commercial Mortgage Securities Corp., 4.171%, 8/15/46 1,468,619 2,000,000 2.14 AAA/Aaa JP Morgan Chase Commercial Mortgage Securities Corp., Floating Rate Note, 11/15/28 (144A) 2,008,126 1,100,000 0.40 A-/Aa3 JP Morgan Chase Commercial Mortgage Securities Corp., Floating Rate Note, 5/15/47 1,026,223 1,750,000 5.15 AA+/Aaa JP Morgan Chase Commercial Mortgage Securities Corp., Floating Rate Note, 7/12/35 1,755,007 550,287 0.62 NR/Aa1 JP Morgan Chase Commercial Mortgage Securities Corp., Floating Rate Note, 7/15/19 (144A) 532,403 1,000,000 4.65 BBB+/Baa1 JP Morgan Chase Commercial Mortgage Securities Corp., Floating Rate Note, 7/15/28 (144A) 984,091 2,546,505 BBB/Ba2 JP Morgan Mortgage Trust, 6.0%, 9/25/34 2,615,490 1,763,429 2.36 AAA/Baa1 JP Morgan Mortgage Trust, Floating Rate Note, 10/25/33 1,792,642 2,234,279 4.44 AAA/Baa1 JP Morgan Mortgage Trust, Floating Rate Note, 10/25/33 2,269,404 1,992,671 2.49 AAA/Baa3 JP Morgan Mortgage Trust, Floating Rate Note, 2/25/34 1,999,243 1,366,518 4.89 AAA/Baa1 JP Morgan Mortgage Trust, Floating Rate Note, 2/25/34 1,373,135 2,766,459 AAA/Aaa LB-UBS Commercial Mortgage Trust, 4.664%, 7/15/30 2,797,720 2,800,000 5.62 BBB+/NR LB-UBS Commercial Mortgage Trust, Floating Rate Note, 10/15/35 (144A) 2,775,942 1,549,430 0.59 BBB/Aaa Lehman Brothers Floating Rate Commercial Mortgage Trust, Floating Rate Note, 6/15/22 (144A) 1,535,873 333,284 1.10 AAA/Aaa Lehman Brothers Small Balance Commercial, Floating Rate Note, 10/25/37 (144A) 323,033 650,774 5.41 AAA/Aaa Lehman Brothers Small Balance Commercial, Floating Rate Note, 12/25/36 (144A) 644,102 1,013,640 0.50 AAA/Aa1 Lehman Brothers Small Balance Commercial, Floating Rate Note, 2/25/30 (144A) 826,344 1,349,805 5.25 BB+/B3 Mastr Adjustable Rate Mortgages Trust, Floating Rate Note, 1/25/35 1,274,215 The accompanying notes are an integral part of these financial statements. 26 Pioneer Bond Fund | Annual Report | 6/30/12 ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate(b) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 543,782 A-/NR MASTR Alternative Loans Trust, 4.5%, 1/25/15 $ 545,752 441,942 B-/NR MASTR Alternative Loans Trust, 5.5%, 1/25/35 453,063 1,573,960 B+/NR MASTR Alternative Loans Trust, 5.5%, 10/25/19 1,622,022 2,099,300 AAA/NR MASTR Alternative Loans Trust, 5.5%, 2/25/35 2,095,920 3,097,639 B/NR MASTR Alternative Loans Trust, 6.0%, 7/25/34 3,112,158 1,284,150 6.81 A-/NR MASTR Seasoned Securities Trust, Floating Rate Note, 9/25/32 1,352,278 307,875 AAA/Aaa Merrill Lynch Mortgage Trust, 4.556%, 6/12/43 308,390 99,471 5.44 AAA/NR Merrill Lynch/Countrywide Commercial Mortgage Trust, Floating Rate Note, 2/12/39 99,786 3,162,332 0.71 AAA/Baa2 MLCC Mortgage Investors, Inc., Floating Rate Note, 3/25/30 2,788,857 1,478,460 0.71 AAA/A3 MLCC Mortgage Investors, Inc., Floating Rate Note, 4/25/29 1,325,589 2,950,000 NR/NR Morgan Stanley Reremic Trust, 5.0%, 11/26/36 (144A) 2,858,992 1,148,473 NR/Aa3 PHH Mortgage Capital LLC, 6.6%, 12/25/27 (Step) (144A) 1,119,350 817,840 B+/B2 RAAC Series, 6.0%, 1/25/32 834,585 1,118,258 AA-/NR Residential Asset Securitization Trust, 5.25%, 11/25/34 1,139,219 931,415 B-/NR Residential Asset Securitization Trust, 5.5%, 2/25/35 946,891 1,922,279 B/NR Residential Asset Securitization Trust, 5.5%, 7/25/35 1,718,531 2,433,355 BBB+/NR Residential Asset Securitization Trust, 5.75%, 12/25/34 2,505,273 1,381,754 1.03 AAA/A3 Sequoia Mortgage Trust, Floating Rate Note, 1/20/35 1,151,969 1,600,592 0.46 AAA/Ba3 Sequoia Mortgage Trust, Floating Rate Note, 3/20/35 1,403,075 4,072,162 0.90 AAA/Baa1 Sequoia Mortgage Trust, Floating Rate Note, 6/20/33 3,638,081 1,707,870 0.86 AAA/Baa3 Sequoia Mortgage Trust, Floating Rate Note, 9/20/33 1,465,523 1,013,874 B-/B2 Structured Asset Securities Corp., 5.0%, 5/25/35 1,001,846 1,515,055 2.88 AAA/A3 Structured Asset Securities Corp., Floating Rate Note, 10/25/33 1,486,720 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/12 27 Schedule of Investments | 6/30/12 (continued) ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate(b) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 1,832,797 0.90 NR/NR Structured Asset Securities Corp., Floating Rate Note, 10/25/37 (144A) $ 1,711,375 8,510,000 5.69 NR/C Structured Asset Securities Corp., Floating Rate Note, 12/18/49 (144A) 1,355,132 2,890,000 5.74 NR/NR Structured Asset Securities Corp., Floating Rate Note, 12/18/49 (144A) 29 1,210,062 4.10 AAA/Ba1 Thornburg Mortgage Securities Trust, Floating Rate Note, 3/25/44 1,211,395 2,723,310 0.99 AAA/Baa3 Thornburg Mortgage Securities Trust, Floating Rate Note, 9/25/44 2,470,045 4,470,000 AAA/Aa1 Timberstar Trust, 5.668%, 10/15/36 (144A) 5,006,968 1,435,000 AA/Aa3 Timberstar Trust, 5.747%, 10/15/36 (144A) 1,567,027 3,787,250 AAA/Aaa Wachovia Bank Commercial Mortgage Trust, 4.803%, 10/15/41 4,064,598 2,500,000 5.61 AA-/NR Wachovia Bank Commercial Mortgage Trust, Floating Rate Note, 4/15/35 (144A) 2,500,435 698,646,775 0.14 AAA/Aaa Wachovia Bank Commercial Mortgage Trust, Floating Rate Note, 6/15/45 (c) 431,065 2,811,872 0.33 AA+/Aaa Wachovia Bank Commercial Mortgage Trust, Floating Rate Note, 9/15/21 (144A) 2,722,988 3,314,169 2.45 AA/NR WaMu Mortgage Pass Through Certificates, Floating Rate Note, 1/25/35 3,212,093 3,346,209 2.45 AAA/A2 WaMu Mortgage Pass Through Certificates, Floating Rate Note, 6/25/33 3,365,610 1,934,719 2.59 AA+/Ba3 WaMu Mortgage Pass Through Certificates, Floating Rate Note, 6/25/34 1,924,658 138,503 2.48 CC/NR WaMu Mortgage Pass Through Certificates, Floating Rate Note, 9/25/35 137,658 3,502,831 NR/Aaa Wells Fargo Commercial Mortgage Trust, 3.349%, 11/15/43 (144A) 3,725,824 1,642,137 AAA/Baa3 Wells Fargo Mortgage Backed Securities Trust, 4.75%, 12/25/18 1,701,740 883,664 AAA/A1 Wells Fargo Mortgage Backed Securities Trust, 5.0%, 11/25/36 924,393 592,232 2.65 AAA/A2 Wells Fargo Mortgage Backed Securities Trust, Floating Rate Note, 10/25/34 592,408 534,319 4.55 AAA/Baa1 Wells Fargo Mortgage Backed Securities Trust, Floating Rate Note, 11/25/33 529,724 933,685 2.49 NR/A3 Wells Fargo Mortgage Backed Securities Trust, Floating Rate Note, 2/25/33 920,798 663,274 2.63 BBB-/B1 Wells Fargo Mortgage Backed Securities Trust, Floating Rate Note, 3/25/35 648,283 357,394 2.62 AAA/Ba1 Wells Fargo Mortgage Backed Securities Trust, Floating Rate Note, 6/25/34 349,548 The accompanying notes are an integral part of these financial statements. 28 Pioneer Bond Fund | Annual Report | 6/30/12 ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate(b) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 350,000 5.39 NR/A2 WF-RBS Commercial Mortgage Trust, Floating Rate Note, 2/15/44 (144A) $ 356,482 -------------- $ 170,809,458 -------------- Total Banks $ 170,809,458 ------------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 2.7% Other Diversified Financial Services -- 2.4% 1,760,285 A+/NR Banc of America Mortgage Securities, Inc., 5.5%, 11/25/34 $ 1,843,784 2,374,119 AAA/NR Banc of America Mortgage Securities, Inc., 5.75%, 1/25/35 2,443,778 1,276,271 2.79 NR/Ba2 Banc of America Mortgage Securities, Inc., Floating Rate Note, 10/25/33 1,226,881 434,570 3.00 AAA/NR Banc of America Mortgage Securities, Inc., Floating Rate Note, 6/25/34 424,619 1,567,779 3.06 AAA/NR Banc of America Mortgage Securities, Inc., Floating Rate Note, 7/25/33 1,546,611 841,245 5.06 AA-/NR Banc of America Mortgage Securities, Inc., Floating Rate Note, 9/25/35 805,660 888,243 NR/B1 Citicorp Mortgage Securities, Inc., 5.0%, 2/25/36 904,851 1,200,000 BBB/A1 Credit Suisse Mortgage Capital Certificates, 5.343%, 12/15/39 1,184,278 1,541,610 0.36 BBB+/Aaa Credit Suisse Mortgage Capital Certificates, Floating Rate Note, 2/15/22 (144A) 1,402,865 1,900,000 5.57 NR/Aa2 DBUBS Mortgage Trust, Floating Rate Note, 8/10/44 (144A) 2,063,618 1,169,631 D/NR JP Morgan Alternative Loan Trust, 5.5%, 3/25/36 778,286 1,773,919 CCC/NR JP Morgan Alternative Loan Trust, 6.0%, 3/25/36 1,258,508 676,744 3.25 NR/NR La Hipotecaria SA de CV, Floating Rate Note, 9/8/39 (144A) 700,633 1,395,000 5.62 NR/A2 LSTAR Commercial Mortgage Trust, Floating Rate Note, 6/25/43 (144A) 1,381,810 1,982,401 2.53 B-/NR Merrill Lynch Mortgage Investors, Inc., Floating Rate Note, 2/25/35 1,968,923 1,289,911 NR/Baa3 RALI Trust, 5.0%, 3/25/19 1,321,521 1,058,224 NR/Ba1 RALI Trust, 5.0%, 7/25/18 1,082,212 3,723,100 NR/B1 RALI Trust, 5.0%, 9/25/19 3,751,653 1,751,292 NR/B3 RALI Trust, 5.5%, 12/25/34 1,731,391 2,194,736 AAA/NR RALI Trust, 6.0%, 10/25/34 2,211,122 871,181 0.44 CCC/Caa3 RALI Trust, Floating Rate Note, 5/25/47 512,864 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/12 29 Schedule of Investments | 6/30/12 (continued) ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate(b) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- Other Diversified Financial Services -- (continued) 1,269,002 2.85 AAA/Baa1 Structured Adjustable Rate Mortgage Loan Trust, Floating Rate Note, 3/25/34 $ 1,163,041 145,290 5.93 NR/NR Vericrest Opportunity Loan Transferee, Floating Rate Note, 12/26/50 (144A) 145,582 1,934,860 4.21 NR/NR Vericrest Opportunity Loan Transferee, Floating Rate Note, 3/25/49 (144A) 1,948,183 -------------- $ 33,802,674 ------------------------------------------------------------------------------------------------------- Specialized Finance -- 0.0%+ 51,829 AAA/NR CW Capital Cobalt, Ltd., 5.174%, 8/15/48 $ 51,981 ------------------------------------------------------------------------------------------------------- Asset Management & Custody Banks -- 0.0%+ 687,781 2.86 NR/NR Jefferies & Co., Inc., Floating Rate Note, 5/26/37 (144A) $ 680,391 ------------------------------------------------------------------------------------------------------- Investment Banking & Brokerage -- 0.3% 257,323 NR/Aaa Banc of America Merrill Lynch Commercial Mortgage, Inc., 5.381%, 1/15/49 $ 257,192 1,440,000 4.88 AAA/NR Banc of America Merrill Lynch Commercial Mortgage, Inc., Floating Rate Note, 7/10/42 1,530,125 1,600,000 7.62 BBB+/Baa2 Bear Stearns Commercial Mortgage Securities, Floating Rate Note, 10/15/36 (144A) 1,667,027 1,250,000 5.94 BB+/Baa3 Bear Stearns Commercial Mortgage Securities, Floating Rate Note, 9/11/38 1,075,066 -------------- $ 4,529,410 -------------- Total Diversified Financials $ 39,064,456 ------------------------------------------------------------------------------------------------------- REAL ESTATE -- 1.4% Mortgage REITs -- 1.2% 450,334 AAA/NR Credit Suisse First Boston Mortgage Securities Corp., 5.5%, 6/25/33 $ 449,413 664,992 7.16 A+/Baa2 Credit Suisse First Boston Mortgage Securities Corp., Floating Rate Note, 12/15/35 (144A) 664,549 1,482,297 1.60 AA+/Aa2 Credit Suisse First Boston Mortgage Securities Corp., Floating Rate Note, 12/25/33 1,408,466 948,694 1.75 AA+/WR Credit Suisse First Boston Mortgage Securities Corp., Floating Rate Note, 8/25/33 881,259 3,250,000 6.45 CCC-/B3 Credit Suisse First Boston Mortgage Securities Corp., Floating Rate Note, 9/15/34 (144A) 1,401,231 650,000 3.61 NR/A2 FREMF Mortgage Trust, Floating Rate Note, 11/25/46 634,083 The accompanying notes are an integral part of these financial statements. 30 Pioneer Bond Fund | Annual Report | 6/30/12 ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate(b) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- Mortgage REITs -- (continued) 1,500,000 4.76 NR/NR FREMF Mortgage Trust, Floating Rate Note, 11/25/49 (144A) $ 1,485,832 494,000 2.29 NR/NR FREMF Mortgage Trust, Floating Rate Note, 12/25/44 (144A) 473,372 850,000 5.44 NR/A3 FREMF Mortgage Trust, Floating Rate Note, 4/25/20 (144A) 885,470 1,750,000 4.94 NR/A3 FREMF Mortgage Trust, Floating Rate Note, 4/25/44 (144A) 1,791,580 800,000 5.05 NR/A3 FREMF Mortgage Trust, Floating Rate Note, 7/25/44 (144A) 815,710 5,000,000 4.44 A+/NR FREMF Mortgage Trust, Floating Rate Note, 7/25/48 (144A) 5,005,095 600,000 1.00 A+/NR FREMF Mortgage Trust, Floating Rate Note, 9/25/43 621,926 890,000 5.33 NR/NR FREMF Mortgage Trust, Floating Rate Note, 9/25/45 (144A) 917,765 -------------- $ 17,435,751 ------------------------------------------------------------------------------------------------------- Diversified Real Estate Activities -- 0.1% 1,337,511 0.68 AAA/Aaa Mellon Residential Funding Corp., Floating Rate Note, 12/15/30 $ 1,265,551 ------------------------------------------------------------------------------------------------------- Real Estate Services -- 0.1% 717,515 0.45 AAA/NR Banc of America Large Loan, Inc., Floating Rate Note, 10/15/19 (144A) $ 688,814 1,130,000 0.99 AA+/Aa1 Banc of America Large Loan, Inc., Floating Rate Note, 8/15/29 (144A) 1,046,782 388,288 AAA/NR Washington Mutual MSC Mortgage Pass-Through CTFS, 7.0%, 7/25/33 409,347 -------------- $ 2,144,943 -------------- Total Real Estate $ 20,846,245 ------------------------------------------------------------------------------------------------------- GOVERNMENT -- 1.6% 7,650 AA+/Aaa Fannie Mae REMICS, 10.3%, 4/25/19 $ 8,613 2,700,000 AA+/Aaa Fannie Mae REMICS, 5.0%, 3/25/24 2,808,420 5,000,000 AA+/Aaa Fannie Mae REMICS, 5.0%, 7/25/33 5,270,210 89,429 AA+/Aaa Fannie Mae REMICS, 5.69%, 1/25/32 91,460 5,000,000 AA+/Aaa Freddie Mac REMICS, 5.0%, 6/15/33 5,187,630 240,716 AA+/Aaa Freddie Mac REMICS, 5.0%, 8/15/35 244,634 2,729,763 AA+/Aaa Freddie Mac REMICS, 5.5%, 2/15/33 2,786,871 80,866,505 0.68 AA+/Aaa Government National Mortgage Association, Floating Rate Note, 11/16/51 (c) 3,574,866 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/12 31 Schedule of Investments | 6/30/12 (continued) ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate(b) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- Government -- (continued) 11,985,746 1.03 NR/NR Government National Mortgage Association, Floating Rate Note, 2/16/53 (c) $ 1,054,158 8,300,000 1.05 NR/NR Government National Mortgage Association, Floating Rate Note, 3/16/53 (c) 712,721 13,938,602 1.10 NR/NR Government National Mortgage Association, Floating Rate Note, 8/16/52 (c) 1,127,201 -------------- $ 22,866,784 -------------- Total Government $ 22,866,784 ------------------------------------------------------------------------------------------------------- TOTAL COLLATERALIZED MORTGAGE OBLIGATIONS (Cost $265,504,832) $ 254,390,773 ------------------------------------------------------------------------------------------------------- CORPORATE BONDS -- 36.0% ENERGY -- 3.6% Oil & Gas Drilling -- 0.1% 1,025,000 BBB+/Baa1 Pride International, Inc., 6.875%, 8/15/20 $ 1,257,645 ------------------------------------------------------------------------------------------------------- Oil & Gas Equipment & Services -- 0.3% 125,000 BBB/Baa2 Weatherford International, Ltd. Bermuda, 5.95%, 4/15/42 $ 131,488 2,815,000 BBB/Baa2 Weatherford International, Ltd. Bermuda, 9.625%, 3/1/19 3,668,632 -------------- $ 3,800,120 ------------------------------------------------------------------------------------------------------- Oil & Gas Exploration & Production -- 0.9% 2,292,000 BB/B1 Denbury Resources, Inc., 8.25%, 2/15/20 $ 2,509,740 1,800,000 B/B2 EP Energy LLC, 9.375%, 5/1/20 (144A) 1,865,250 1,051,089 BBB+/NR Gazprom OAO Via Gazprom International SA, 7.201%, 2/1/20 1,146,958 901,000 BBB/Baa2 Marathon Oil Corp., 5.9%, 3/15/18 1,054,740 1,400,000 BBB-/Ba1 Newfield Exploration Co., 5.625%, 7/1/24 1,431,500 1,141,316 A/Aa3 Ras Laffan Liquefied Natural Gas Co., Ltd. III, 5.832%, 9/30/16 (144A) 1,222,634 1,000,000 BBB-/Baa2 TNK-BP Finance SA, 6.625%, 3/20/17 (144A) 1,086,300 2,080,000 BBB-/Baa2 TNK-BP Finance SA, 7.5%, 7/18/16 (144A) 2,311,504 1,000,000 BBB-/Baa2 TNK-BP Finance SA, 7.875%, 3/13/18 (144A) 1,143,750 -------------- $ 13,772,376 ------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 32 Pioneer Bond Fund | Annual Report | 6/30/12 ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate(b) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- Oil & Gas Refining & Marketing -- 0.5% 2,475,000 BBB/Baa2 Spectra Energy Capital LLC, 6.2%, 4/15/18 $ 2,954,269 2,890,000 BBB/Baa2 Valero Energy Corp., 9.375%, 3/15/19 3,798,107 -------------- $ 6,752,376 ------------------------------------------------------------------------------------------------------- Oil & Gas Storage & Transportation -- 1.8% 435,000 BBB-/Baa2 Boardwalk Pipelines LP, 5.5%, 2/1/17 $ 477,794 1,535,000 BBB/Baa3 Buckeye Partners LP, 6.05%, 1/15/18 1,668,172 2,900,000 BBB/Baa2 DCP Midstream LLC, 9.75%, 3/15/19 (144A) 3,759,583 3,250,000 BBB/Baa2 Kinder Morgan Energy Partners LP, 5.95%, 2/15/18 3,768,729 3,500,000 BBB/Baa2 Plains All American Pipeline LP, 6.125%, 1/15/17 4,069,076 3,885,000 A/A3 Questar Pipeline Co., 5.83%, 2/1/18 4,582,618 1,200,000 3.48 BB/Ba1 Southern Union Co., Floating Rate Note, 11/1/66 976,500 1,500,000 BBB/Baa2 Spectra Energy Capital LLC, 6.75%, 7/15/18 1,752,106 2,200,000 BBB/Baa2 Sunoco Logistics Partners Operations LP, 6.1%, 2/15/42 2,268,288 2,475,000 BBB-/Baa3 The Williams Companies, Inc., 7.75%, 6/15/31 3,072,312 -------------- $ 26,395,178 -------------- Total Energy $ 51,977,695 ------------------------------------------------------------------------------------------------------- MATERIALS -- 1.8% Diversified Chemicals -- 0.1% 980,000 BBB/Baa2 Eastman Chemical Co., 4.8%, 9/1/42 $ 999,005 ------------------------------------------------------------------------------------------------------- Specialty Chemicals -- 0.2% 2,400,000 BBB/Baa2 Cytec Industries, Inc., 8.95%, 7/1/17 $ 2,981,436 ------------------------------------------------------------------------------------------------------- Construction Materials -- 0.2% 3,328,000 B-/NR Cemex Espana Luxembourg, 9.875%, 4/30/19 (144A) $ 2,949,440 475,000 BBB/Baa2 Holcim US Finance Sarl & Cie SCS, 6.0%, 12/30/19 (144A) 498,012 -------------- $ 3,447,452 ------------------------------------------------------------------------------------------------------- Aluminum -- 0.2% 2,425,000 BBB-/Baa3 Alcoa, Inc., 6.15%, 8/15/20 $ 2,552,776 ------------------------------------------------------------------------------------------------------- Diversified Metals & Mining -- 0.6% 3,085,000 BBB-/Baa3 AngloGold Ashanti Holdings Plc, 5.375%, 4/15/20 $ 3,170,547 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/12 33 Schedule of Investments | 6/30/12 (continued) ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate(b) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- Diversified Metals & Mining -- (continued) 5,000,000 BBB-/Baa3 Gold Fields Orogen Holding BVI, Ltd., 4.875%, 10/7/20 (144A) $ 4,764,235 950,000 BBB/Baa2 Teck Resources, Ltd., 10.25%, 5/15/16 1,060,438 -------------- $ 8,995,220 ------------------------------------------------------------------------------------------------------- Steel -- 0.5% 500,000 BBB-/Baa3 ArcelorMittal, 5.5%, 3/1/21 $ 473,258 3,900,000 BBB-/Baa3 ArcelorMittal, 6.125%, 6/1/18 3,954,393 2,805,000 BB+/Ba2 Commercial Metals Co., 7.35%, 8/15/18 2,868,112 -------------- $ 7,295,763 -------------- Total Materials $ 26,271,652 ------------------------------------------------------------------------------------------------------- CAPITAL GOODS -- 2.4% Aerospace & Defense -- 0.3% 3,020,000 BB/Ba2 Esterline Technologies Corp., 6.625%, 3/1/17 $ 3,121,925 940,000 A/A2 United Technologies Corp., 4.5%, 6/1/42 1,032,501 -------------- $ 4,154,426 ------------------------------------------------------------------------------------------------------- Building Products -- 0.4% 825,000 BBB-/Ba2 Masco Corp., 5.95%, 3/15/22 $ 849,243 4,260,000 BBB-/Ba2 Masco Corp., 7.125%, 3/15/20 4,700,314 -------------- $ 5,549,557 ------------------------------------------------------------------------------------------------------- Electrical Components & Equipment -- 0.4% 2,665,000 BB/Ba3 Anixter, Inc., 5.95%, 3/1/15 $ 2,771,600 2,670,000 B+/Ba2 Belden, Inc., 7.0%, 3/15/17 2,750,100 -------------- $ 5,521,700 ------------------------------------------------------------------------------------------------------- Industrial Conglomerates -- 0.2% 2,950,000 BBB/Baa2 Tyco Electronics Group SA, 6.55%, 10/1/17 $ 3,521,748 ------------------------------------------------------------------------------------------------------- Construction & Farm Machinery & Heavy Trucks -- 0.1% 910,000 A/Baa1 Cummins, Inc., 6.75%, 2/15/27 $ 1,128,906 ------------------------------------------------------------------------------------------------------- Industrial Machinery -- 0.3% 2,150,000 BBB+/Baa1 Ingersoll-Rand Global Holding Co., Ltd., 9.5%, 4/15/14 $ 2,443,733 1,810,000 BBB-/Baa3 Valmont Industries, Inc., 6.625%, 4/20/20 2,123,919 -------------- $ 4,567,652 ------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 34 Pioneer Bond Fund | Annual Report | 6/30/12 ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate(b) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- Trading Companies & Distributors -- 0.7% 3,525,000 BBB-/NR Aviation Capital Group Corp., 6.75%, 4/6/21 (144A) $ 3,536,033 5,660,000 BBB/Baa2 GATX Corp., 6.0%, 2/15/18 6,292,409 -------------- $ 9,828,442 -------------- Total Capital Goods $ 34,272,431 ------------------------------------------------------------------------------------------------------- TRANSPORTATION -- 0.2% Air Freight & Logistics -- 0.0%+ 525,000 A-/A3 Tyco International Finance SA, 8.5%, 1/15/19 $ 718,952 ------------------------------------------------------------------------------------------------------- Airlines -- 0.2% 1,809,942 BBB-/Baa3 American Airlines 2011-2 Class A Pass Through Trust, 8.625%, 10/15/21 $ 1,900,439 378,399 BBB/Baa2 Southwest Airlines Co., 7.67%, 1/2/14 391,408 -------------- $ 2,291,847 ------------------------------------------------------------------------------------------------------- Trucking -- 0.0%+ 529,000 BBB-/Baa2 Asciano Finance, Ltd., 4.625%, 9/23/20 (144A) $ 526,287 -------------- Total Transportation $ 3,537,086 ------------------------------------------------------------------------------------------------------- AUTOMOBILES & COMPONENTS -- 0.1% Automobile Manufacturers -- 0.1% 655,000 BBB+/Baa2 Hyundai Motor Manufacturing Czech sro, 4.5%, 4/15/15 (144A) $ 688,679 790,000 BBB+/Baa1 Nissan Motor Acceptance Corp., 4.5%, 1/30/15 (144A) 841,657 -------------- $ 1,530,336 -------------- Total Automobiles & Components $ 1,530,336 ------------------------------------------------------------------------------------------------------- CONSUMER DURABLES & APPAREL -- 0.3% Household Appliances -- 0.3% 4,235,000 BBB-/Baa3 Whirlpool Corp., 5.5%, 3/1/13 $ 4,346,808 -------------- Total Consumer Durables & Apparel $ 4,346,808 ------------------------------------------------------------------------------------------------------- CONSUMER SERVICES -- 0.8% Education Services -- 0.8% 1,000,000 NR/NR Bowdoin College, 4.693%, 7/1/12 $ 1,008,120 1,100,000 AAA/Aaa Massachusetts Institute of Technology, 5.6%, 7/1/11 1,527,592 3,095,000 AAA/Aaa President and Fellows of Harvard College, 6.3%, 10/1/37 3,601,559 1,900,000 A+/A1 The George Washington University, 1.827%, 9/15/17 1,913,832 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/12 35 Schedule of Investments | 6/30/12 (continued) ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate(b) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- Education Services -- (continued) 3,550,000 AA-/Aa2 Tufts University, 5.017%, 4/15/12 $ 4,059,212 -------------- $ 12,110,315 -------------- Total Consumer Services $ 12,110,315 ------------------------------------------------------------------------------------------------------- MEDIA -- 0.4% Broadcasting -- 0.4% 2,650,000 BB-/B1 CCO Holdings LLC, 6.625%, 1/31/22 $ 2,835,500 2,070,000 BBB/Baa2 Globo Comunicacao e Participacoes SA, 4.875%, 4/11/22 (144A) 2,139,053 -------------- $ 4,974,553 -------------- Total Media $ 4,974,553 ------------------------------------------------------------------------------------------------------- RETAILING -- 0.1% Internet Retail -- 0.1% 800,000 BBB-/Ba1 Expedia, Inc., 5.95%, 8/15/20 $ 838,166 -------------- Total Retailing $ 838,166 ------------------------------------------------------------------------------------------------------- FOOD & STAPLES RETAILING -- 0.2% Drug Retail -- 0.2% 764,413 BBB+/Baa2 CVS Pass-Through Trust, 5.298%, 1/11/27 (144A) $ 799,683 1,503,166 BBB+/Baa2 CVS Pass-Through Trust, 5.773%, 1/10/33 (144A) 1,662,171 -------------- $ 2,461,854 -------------- Total Food & Staples Retailing $ 2,461,854 ------------------------------------------------------------------------------------------------------- FOOD, BEVERAGE & TOBACCO -- 1.1% Distillers & Vintners -- 0.1% 1,500,000 BBB-/Baa2 Beam, Inc., 3.25%, 5/15/22 $ 1,508,643 ------------------------------------------------------------------------------------------------------- Agricultural Products -- 0.4% 5,175,000 BBB-/Ba1 Viterra, Inc., 5.95%, 8/1/20 (144A) $ 5,667,743 ------------------------------------------------------------------------------------------------------- Packaged Foods & Meats -- 0.6% 3,240,000 NR/Baa2 Kraft Foods Group, Inc., 3.5%, 6/6/22 (144A) $ 3,324,765 3,725,000 BBB-/Baa2 Kraft Foods, Inc., 6.5%, 2/9/40 4,785,098 -------------- $ 8,109,863 -------------- Total Food, Beverage & Tobacco $ 15,286,249 ------------------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 0.1% Health Care Facilities -- 0.1% 1,050,000 BB/Ba3 HCA, Inc., 7.875%, 2/15/20 $ 1,165,500 385,000 BB/Ba3 HCA, Inc., 8.5%, 4/15/19 431,200 202,000 BB/B2 HCA, Inc., 9.875%, 2/15/17 219,170 -------------- $ 1,815,870 -------------- Total Health Care Equipment & Services $ 1,815,870 ------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 36 Pioneer Bond Fund | Annual Report | 6/30/12 ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate(b) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- PHARMACEUTICALS, BIOTECHNOLOGY & LIFE SCIENCES -- 0.5% Pharmaceuticals -- 0.1% 1,000,000 AA/A1 Abbott Laboratories, 5.125%, 4/1/19 $ 1,191,205 ------------------------------------------------------------------------------------------------------- Life Sciences Tools & Services -- 0.4% 5,366,000 BBB+/Baa2 Agilent Technologies, Inc., 6.5%, 11/1/17 $ 6,443,697 -------------- Total Pharmaceuticals, Biotechnology & Life Sciences $ 7,634,902 ------------------------------------------------------------------------------------------------------- BANKS -- 4.1% Diversified Banks -- 1.2% 3,515,000 BBB+/Baa3 Barclays Bank Plc, 6.05%, 12/4/17 (144A) $ 3,551,707 3,815,000 NR/A3 BBVA Bancomer SA Texas, 6.5%, 3/10/21 (144A) 3,853,150 3,435,000 AA/Aa2 Cooperatieve Centrale Raiffeisen-Boerenleenbank BA Netherlands, 3.875%, 2/8/22 3,494,195 2,820,000 8.38 BBB-/Ba2 Credit Agricole SA, Floating Rate Note, 10/29/49 (Perpetual) (144A) 2,319,450 625,000 A/A1 Export-Import Bank of Korea, 5.875%, 1/14/15 683,321 1,855,000 A/A1 Industrial Bank of Korea, 7.125%, 4/23/14 (144A) 2,014,834 2,000,000 3.22 A/NR SBP DPR Finance Co., Floating Rate Note, 3/15/17 (144A) 1,992,047 -------------- $ 17,908,704 ------------------------------------------------------------------------------------------------------- Regional Banks -- 2.7% 1,585,000 BB+/Baa3 Capital One Capital VI, 8.875%, 5/15/40 $ 1,610,756 1,190,000 A/NR CoBank ACB, 7.875%, 4/16/18 (144A) 1,451,804 3,350,000 A/A2 HSBC Bank USA NA New York NY, 6.0%, 8/9/17 3,725,833 2,505,000 A/A1 Mellon Funding Corp., 5.5%, 11/15/18 2,883,741 1,435,000 A-/A3 PNC Bank NA, 6.0%, 12/7/17 1,670,684 6,273,000 8.25 BBB/Baa3 PNC Financial Services Group, Inc., Floating Rate Note, 5/29/49 (Perpetual) 6,479,815 1,050,000 6.75 BBB/Baa3 PNC Financial Services Group, Inc., Floating Rate Note, 7/29/49 (Perpetual) 1,107,435 1,500,000 8.70 BBB/Baa3 PNC Preferred Funding Trust III, Floating Rate Note, 3/29/49 (Perpetual) (144A) 1,533,585 4,080,000 BBB/Baa2 Sovereign Bank, 8.75%, 5/30/18 4,423,340 9,470,000 5.46 BBB+/Baa1 State Street Capital Trust III, Floating Rate Note, 1/29/49 (Perpetual) 9,496,327 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/12 37 Schedule of Investments | 6/30/12 (continued) ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate(b) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- Regional Banks -- (continued) 3,520,000 A+/A1 Wachovia Bank NA, 6.0%, 11/15/17 $ 4,101,567 -------------- $ 38,484,887 ------------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- 0.2% 2,300,000 BBB-/Baa2 Astoria Financial Corp., 5.0%, 6/19/17 $ 2,299,844 -------------- Total Banks $ 58,693,435 ------------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 7.8% Other Diversified Financial Services -- 2.5% 3,800,000 BBB+/Baa2 Alterra Finance LLC, 6.25%, 9/30/20 $ 4,040,635 1,100,000 BBB+/Baa3 Bank of America Corp., 7.75%, 8/15/15 1,197,503 875,000 6.50 BB+/NR Caelus Re II, Ltd., Floating Rate Note, 5/24/13 (Cat Bond) (144A) 877,450 300,000 9.00 BB-/NR Compass Re, Ltd., Floating Rate Note, 1/8/15 (Cat Bond) (144A) 300,000 950,000 10.25 BB-/NR Compass Re, Ltd., Floating Rate Note, 1/8/15 (Cat Bond) (144A) 951,615 250,000 0.00 BB/NR East Lane Re V, Ltd., Floating Rate Note, 3/16/16 (Cat Bond) (144A) 259,625 4,860,000 AA/A2 General Electric Capital Corp., 5.3%, 2/11/21 5,454,777 1,800,000 7.12 AA-/Baa1 General Electric Capital Corp., Floating Rate Note, 12/15/49 (Perpetual) 1,901,628 890,000 BBB+/Baa2 Hyundai Capital Services, Inc., 3.5%, 9/13/17 (144A) 897,506 1,840,000 BBB+/Baa2 Hyundai Capital Services, Inc., 6.0%, 5/5/15 (144A) 2,001,638 2,575,000 A/A2 JPMorgan Chase & Co., 6.0%, 1/15/18 2,955,742 6,140,000 7.90 BBB/Ba1 JPMorgan Chase & Co., Floating Rate Note, 4/29/49 (Perpetual) 6,731,221 2,400,000 6.00 BB/NR Lodestone Re, Ltd., Floating Rate Note, 1/8/14 (Cat Bond) (144A) 2,346,240 1,650,000 6.25 BB/NR Lodestone Re, Ltd., Floating Rate Note, 5/17/13 (Cat Bond) (144A) 1,634,325 250,000 8.25 BB-/NR Lodestone Re, Ltd., Floating Rate Note, 5/17/13 (Cat Bond) (144A) 248,450 850,000 9.97 BB-/NR Loma Reinsurance, Ltd., Floating Rate Note, 12/21/12 (Cat Bond) (144A) 848,640 750,000 7.50 BB-/NR Queen Street II Capital, Ltd., Floating Rate Note, 4/9/14 (Cat Bond) (144A) 736,500 500,000 7.50 BB-/NR Queen Street IV Capital, Ltd., Floating Rate Note, 4/9/15 (Cat Bond) (144A) 481,250 1,250,000 0.00 BB/NR Residential Reinsurance 2010, Ltd., Floating Rate Note, 6/6/13 (Cat Bond) (144A) 1,243,875 The accompanying notes are an integral part of these financial statements. 38 Pioneer Bond Fund | Annual Report | 6/30/12 ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate(b) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- Other Diversified Financial Services -- (continued) 400,000 9.00 BB-/NR Residential Reinsurance 2011, Ltd., Floating Rate Note, 6/6/15 (Cat Bond) (144A) $ 391,600 275,000 0.00 BB-/NR Residential Reinsurance 2012, Ltd., Floating Rate Note, 6/6/16 (Cat Bond) (144A) 279,042 800,000 0.00 BB/NR Residential Reinsurance 2012, Ltd., Floating Rate Note, 6/6/16 (Cat Bond) (144A) 803,920 -------------- $ 36,583,182 ------------------------------------------------------------------------------------------------------- Specialized Finance -- 1.0% 2,850,000 BBB/Baa2 Banque PSA Finance SA, 5.75%, 4/4/21 (144A) $ 2,619,176 2,900,000 BBB+/Baa1 BM&FBovespa SA, 5.5%, 7/16/20 (144A) 3,074,000 5,205,000 BBB/Baa3 Cantor Fitzgerald LP, 7.875%, 10/15/19 (144A) 5,137,736 625,000 5.25 BB+/NR Kibou, Ltd., Floating Rate Note, 2/16/15 (Cat Bond) (144A) 631,438 2,000,000 A+/A1 National Rural Utilities Cooperative Finance Corp., 5.45%, 2/1/18 2,371,250 -------------- $ 13,833,600 ------------------------------------------------------------------------------------------------------- Consumer Finance -- 0.8% 1,465,000 BBB/Baa1 Capital One Bank USA NA, 8.8%, 7/15/19 $ 1,844,951 2,575,000 A/A2 Caterpillar Financial Services Corp., 7.05%, 10/1/18 3,321,634 3,155,000 4.00 BBB-/Ba1 SLM Corp., Floating Rate Note, 7/25/14 3,154,306 4,435,000 CCC/Caa1 Springleaf Finance Corp., 6.9%, 12/15/17 3,539,662 -------------- $ 11,860,553 ------------------------------------------------------------------------------------------------------- Asset Management & Custody Banks -- 0.8% 3,945,000 A-/A3 Eaton Vance Corp., 6.5%, 10/2/17 $ 4,506,823 4,050,000 BBB-/Baa3 Janus Capital Group, Inc., 6.7%, 6/15/17 4,344,326 2,000,000 A/A1 The Bank of New York Mellon Corp., 4.95%, 3/15/15 2,169,660 -------------- $ 11,020,809 ------------------------------------------------------------------------------------------------------- Investment Banking & Brokerage -- 2.7% 661,173 BBB-/NR Alta Wind Holdings LLC, 7.0%, 6/30/35 (144A) $ 743,237 11,040,000 4.00 BB+/Ba2 Goldman Sachs Capital II, Floating Rate Note, 6/1/43 7,474,301 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/12 39 Schedule of Investments | 6/30/12 (continued) ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate(b) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- Investment Banking & Brokerage -- (continued) 600,000 BBB/Baa2 Jefferies Group, Inc., 5.125%, 4/13/18 $ 582,000 3,125,000 BBB/Baa2 Jefferies Group, Inc., 6.875%, 4/15/21 3,142,522 250,000 BBB/Baa2 Jefferies Group, Inc., 8.5%, 7/15/19 271,250 3,000,000 BBB/A3 Macquarie Bank, Ltd., 6.625%, 4/7/21 (144A) 3,008,028 2,730,000 BBB/A3 Macquarie Group, Ltd., 6.0%, 1/14/20 (144A) 2,715,878 221,000 A-/Baa2 Merrill Lynch & Co., Inc., 5.0%, 2/3/14 228,566 3,875,000 A-/Baa2 Merrill Lynch & Co., Inc., 5.45%, 2/5/13 3,952,918 4,350,000 BBB+/Baa3 Merrill Lynch & Co., Inc., 7.75%, 5/14/38 4,961,854 3,125,000 A-/Baa1 Morgan Stanley, 5.5%, 1/26/20 3,060,688 2,765,000 A-/Baa1 Morgan Stanley, 6.625%, 4/1/18 2,890,996 500,000 4.75 B+/NR Queen Street III Capital, Ltd., Floating Rate Note, 7/28/14 (Cat Bond) (144A) 498,650 3,450,000 NR/Baa3 Scottrade Financial Services, Inc., 6.125%, 7/11/21 (144A) 3,503,634 2,000,000 A-/A3 The Goldman Sachs Group, Inc., 5.5%, 11/15/14 2,112,322 -------------- $ 39,146,844 -------------- Total Diversified Financials $ 112,444,988 ------------------------------------------------------------------------------------------------------- INSURANCE -- 5.3% Life & Health Insurance -- 1.7% 1,850,000 BBB/Baa2 Delphi Financial Group, Inc., 7.875%, 1/31/20 $ 2,186,791 1,690,000 A-/Baa2 Lincoln National Corp., 8.75%, 7/1/19 2,128,182 3,380,000 6.05 BBB/Ba1 Lincoln National Corp., Floating Rate Note, 4/20/67 3,092,700 4,200,000 BBB/Baa2 MetLife, Inc., 10.75%, 8/1/39 5,869,500 4,250,000 A-/Baa2 Protective Life Corp., 7.375%, 10/15/19 4,912,294 2,800,000 A/Baa2 Prudential Financial, Inc., 2.75%, 1/14/13 2,827,625 1,090,000 A/Baa2 Prudential Financial, Inc., 4.5%, 11/16/21 1,131,307 2,140,000 8.88 BBB+/Baa3 Prudential Financial, Inc., Floating Rate Note, 6/15/38 2,541,250 -------------- $ 24,689,649 ------------------------------------------------------------------------------------------------------- Multi-line Insurance -- 1.0% 3,960,000 BBB/Baa3 Genworth Financial, Inc., 7.2%, 2/15/21 $ 3,771,900 3,035,000 BBB-/Baa2 Liberty Mutual Group, Inc., 7.3%, 6/15/14 (144A) 3,323,965 4,620,000 7.00 BB/Baa3 Liberty Mutual Group, Inc., Floating Rate Note, 3/15/37 (144A) 4,111,800 The accompanying notes are an integral part of these financial statements. 40 Pioneer Bond Fund | Annual Report | 6/30/12 ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate(b) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- Multi-line Insurance -- (continued) 85,000 10.75 BB/Baa3 Liberty Mutual Group, Inc., Floating Rate Note, 6/15/58 (144A) $ 115,600 2,650,000 A+/A2 Loews Corp., 5.25%, 3/15/16 2,934,104 -------------- $ 14,257,369 ------------------------------------------------------------------------------------------------------- Property & Casualty Insurance -- 1.7% 3,600,000 BBB/Baa3 Sirius International Group, Ltd., 6.375%, 3/20/17 (144A) $ 3,810,211 2,110,000 7.51 BB+/Ba2 Sirius International Group, Ltd., Floating Rate Note, 5/29/49 (Perpetual) (144A) 2,023,638 5,455,000 6.50 BBB/Baa1 The Allstate Corp., Floating Rate Note, 5/15/57 5,373,175 700,000 BBB-/Baa3 The Hanover Insurance Group, Inc., 7.5%, 3/1/20 812,048 5,000,000 BBB-/Baa3 The Hanover Insurance Group, Inc., 7.625%, 10/15/25 5,623,085 2,000,000 A/A2 The Travelers Companies, Inc., 6.25%, 6/15/37 2,590,518 4,185,000 6.50 BBB-/Ba1 XL Group Plc, Floating Rate Note, 12/29/49 (Perpetual) 3,400,312 -------------- $ 23,632,987 ------------------------------------------------------------------------------------------------------- Reinsurance -- 0.9% 250,000 6.41 BB+/NR Blue Danube, Ltd., Floating Rate Note, 4/10/15 (Cat Bond) (144A) $ 255,300 250,000 14.00 B-/NR Blue Fin, Ltd., Floating Rate Note, 5/28/13 (Cat Bond) (144A) 251,350 1,000,000 4.50 NR/Baa1 Combine Re, Ltd., Floating Rate Note, 1/7/15 (Cat Bond) (144A) 1,018,100 800,000 5.00 BB+/NR Foundation Re III, Ltd., Floating Rate Note, 2/25/15 (Cat Bond) 786,960 600,000 5.75 BB/NR Foundation Re III, Ltd., Floating Rate Note, 2/3/14 (Cat Bond) (144A) 585,300 600,000 0.00 BB+/NR Longpoint Re, Ltd., Floating Rate Note, 6/12/15 (Cat Bond) (144A) 606,840 250,000 10.22 B/NR Montana Re, Ltd., Floating Rate Note, 12/7/12 (Cat Bond) (144A) 241,900 400,000 9.00 BB/NR Mystic Re, Ltd., Floating Rate Note, 3/12/15 (Cat Bond) (144A) 400,440 500,000 8.41 NR/Ba3 Mythen, Ltd., Floating Rate Note, 5/7/15 (Cat Bond) (144A) 508,350 5,048,000 BBB/NR Platinum Underwriters Finance, Inc., 7.5%, 6/1/17 5,528,479 1,450,000 6.75 BBB-/Baa3 Reinsurance Group of America, Inc., Floating Rate Note, 12/15/65 1,339,854 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/12 41 Schedule of Investments | 6/30/12 (continued) ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate(b) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- Reinsurance -- (continued) 250,000 11.25 B-/NR Successor X, Ltd., Floating Rate Note, 11/10/15 (Cat Bond) (144A) $ 237,675 1,400,000 9.70 B/NR Successor X, Ltd., Floating Rate Note, 2/25/14 (Cat Bond) (144A) 1,350,440 -------------- $ 13,110,988 -------------- Total Insurance $ 75,690,993 ------------------------------------------------------------------------------------------------------- REAL ESTATE -- 2.8% Diversified REITs -- 0.5% 1,765,000 BBB/Baa2 Digital Realty Trust LP, 4.5%, 7/15/15 $ 1,843,463 725,000 BBB/Baa2 Digital Realty Trust LP, 5.875%, 2/1/20 798,601 1,050,000 BBB/Baa2 Goodman Funding Pty, Ltd., 6.0%, 3/22/22 (144A) 1,064,541 3,455,000 BBB/Baa2 Goodman Funding Pty, Ltd., 6.375%, 4/15/21 (144A) 3,599,416 -------------- $ 7,306,021 ------------------------------------------------------------------------------------------------------- Office REITs -- 0.5% 2,670,000 BBB-/Baa2 Alexandria Real Estate Equities, Inc., 4.6%, 4/1/22 $ 2,733,802 900,000 BBB-/Baa3 BioMed Realty LP, 4.25%, 7/15/22 899,244 1,200,000 BBB/Baa2 Mack-Cali Realty LP, 4.5%, 4/18/22 1,231,333 1,607,000 BBB/Baa2 Mack-Cali Realty LP, 5.125%, 2/15/14 1,679,238 -------------- $ 6,543,617 ------------------------------------------------------------------------------------------------------- Retail REITs -- 0.3% 575,000 BB+/Baa3 DDR Corp., 4.625%, 7/15/22 $ 567,482 2,905,000 BB+/Baa3 DDR Corp., 7.5%, 4/1/17 3,332,819 -------------- $ 3,900,301 ------------------------------------------------------------------------------------------------------- Specialized REITs -- 1.2% 730,000 BBB-/Baa3 CubeSmart LP, 4.8%, 7/15/22 $ 737,953 860,000 BBB-/Baa2 Health Care Real Estate Investment Trust, Inc., 6.0%, 11/15/13 901,707 4,125,000 BBB-/Baa2 Health Care Real Estate Investment Trust, Inc., 6.2%, 6/1/16 4,540,606 2,425,000 BBB-/Baa3 Healthcare Realty Trust, Inc., 6.5%, 1/17/17 2,650,818 4,175,000 BBB-/Baa2 Hospitality Properties Trust, 7.875%, 8/15/14 4,515,555 4,285,000 BBB-/Baa3 Senior Housing Properties Trust, 6.75%, 4/15/20 4,645,154 -------------- $ 17,991,793 ------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 42 Pioneer Bond Fund | Annual Report | 6/30/12 ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate(b) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- Diversified Real Estate Activities -- 0.3% 4,125,000 A-/A2 WEA Finance LLC, 7.125%, 4/15/18 (144A) $ 4,886,326 ------------------------------------------------------------------------------------------------------- Real Estate Operating Companies -- 0.0% 180,000 B-/B3 Forest City Enterprises, Inc., 7.625%, 6/1/15 $ 178,650 -------------- Total Real Estate $ 40,806,708 ------------------------------------------------------------------------------------------------------- SOFTWARE & SERVICES -- 0.0% Data Processing & Outsourced Services -- 0.0% 447,000 B-/Caa1 First Data Corp., 8.25%, 1/15/21 (144A) $ 447,000 -------------- Total Software & Services $ 447,000 ------------------------------------------------------------------------------------------------------- SEMICONDUCTORS & SEMICONDUCTOR EQUIPMENT -- 0.3% Semiconductor Equipment -- 0.3% 3,100,000 BBB/Baa1 KLA-Tencor Corp., 6.9%, 5/1/18 $ 3,702,705 -------------- Total Semiconductors & Semiconductor Equipment $ 3,702,705 ------------------------------------------------------------------------------------------------------- TELECOMMUNICATION SERVICES -- 1.4% Integrated Telecommunication Services -- 1.0% 2,530,000 B/B1 Cincinnati Bell, Inc., 8.25%, 10/15/17 $ 2,631,200 580,000 B/B1 Cincinnati Bell, Inc., 8.375%, 10/15/20 591,600 3,355,000 NR/A2 GTP Acquisition Partners I LLC, 4.347%, 6/15/16 (144A) 3,511,897 800,000 NR/NR GTP Cellular Sites LLC, 3.721%, 3/15/17 (144A) 807,683 3,950,000 NR/A2 GTP Towers Issuer LLC, 4.436%, 2/15/15 (144A) 4,054,478 2,750,000 BBB/Baa2 Telefonica Emisiones SAU, 6.221%, 7/3/17 2,581,681 -------------- $ 14,178,539 ------------------------------------------------------------------------------------------------------- Wireless Telecommunication Services -- 0.4% 3,015,000 NR/A2 Crown Castle Towers LLC, 4.883%, 8/15/20 (144A) $ 3,273,434 1,625,000 NR/A2 Crown Castle Towers LLC, 6.113%, 1/15/20 (144A) 1,881,126 -------------- $ 5,154,560 -------------- Total Telecommunication Services $ 19,333,099 ------------------------------------------------------------------------------------------------------- UTILITIES -- 2.7% Electric Utilities -- 1.5% 980,000 A-/A3 Commonwealth Edison Co., 6.15%, 9/15/17 $ 1,186,622 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/12 43 Schedule of Investments | 6/30/12 (continued) ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate(b) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- Electric Utilities -- (continued) 699,930 BBB-/Baa3 Crockett Cogeneration LP, 5.869%, 3/30/25 (144A) $ 721,159 3,365,000 BBB+/Baa1 Enel Finance International NV, 5.125%, 10/7/19 (144A) 3,214,460 1,009,764 BB/Baa3 FPL Energy American Wind LLC, 6.639%, 6/20/23 (144A) 1,031,040 255,150 B/Ba2 FPL Energy Wind Funding LLC, 6.876%, 6/27/17 (144A) 209,861 1,925,000 BB+/Baa3 Israel Electric Corp., Ltd., 7.25%, 1/15/19 (144A) 1,968,108 610,000 BB+/Baa3 Israel Electric Corp., Ltd., 9.375%, 1/28/20 (144A) 692,598 910,000 BBB/Baa1 Nevada Power Co., 6.5%, 8/1/18 1,127,118 900,227 NR/WR Orcal Geothermal, Inc., 6.21%, 12/30/20 (144A) 918,232 2,690,000 BBB-/Baa3 Public Service Co of New Mexico, 7.95%, 5/15/18 3,221,278 2,200,000 6.25 BBB-/Baa2 Southern California Edison Co., Floating Rate Note, 8/1/49 (Perpetual) 2,298,120 3,550,000 BBB+/A3 West Penn Power Co., 5.95%, 12/15/17 (144A) 4,165,602 -------------- $ 20,754,198 ------------------------------------------------------------------------------------------------------- Gas Utilities -- 0.2% 2,377,049 A+/A1 Nakilat, Inc., 6.267%, 12/31/33 (144A) $ 2,645,798 ------------------------------------------------------------------------------------------------------- Multi-Utilities -- 0.4% 5,055,000 BBB+/Baa1 New York State Electric & Gas Corp., 6.15%, 12/15/17 (144A) $ 5,734,862 369,080 NR/NR Ormat Funding Corp., 8.25%, 12/30/20 339,554 -------------- $ 6,074,416 ------------------------------------------------------------------------------------------------------- Independent Power Producers & Energy Traders -- 0.6% 2,675,000 BB-/Ba3 Intergen NV, 9.0%, 6/30/17 (144A) $ 2,621,500 2,105,000 BBB-/Baa3 Kiowa Power Partners LLC, 5.737%, 3/30/21 (144A) 2,230,500 1,016,000 BB+/Ba2 NSG Holdings LLC, 7.75%, 12/15/25 (144A) 1,016,000 2,460,130 BBB-/Baa3 Panoche Energy Center LLC, 6.885%, 7/31/29 (144A) 2,753,328 -------------- $ 8,621,328 -------------- Total Utilities $ 38,095,740 ------------------------------------------------------------------------------------------------------- TOTAL CORPORATE BONDS (Cost $473,662,877) $ 516,272,585 ------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 44 Pioneer Bond Fund | Annual Report | 6/30/12 ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate(b) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- 19.6% 15,769,485 AAA/Aaa Federal National Mortgage Association, 4.0%, 7/1/18-4/1/42 $ 16,836,156 22,454,498 AAA/Aaa Federal National Mortgage Association, 4.5%, 11/1/20-1/1/42 24,188,342 21,438,245 AAA/Aaa Federal National Mortgage Association, 5.0%, 12/1/17-8/1/40 23,305,138 9,699,272 AAA/Aaa Federal National Mortgage Association, 5.5%, 9/1/17-6/1/36 10,619,297 9,177,544 AAA/Aaa Federal National Mortgage Association, 6.0%, 6/1/16-7/1/38 10,242,254 1,663,980 AAA/Aaa Federal National Mortgage Association, 6.5%, 1/1/15-11/1/37 1,900,520 460,381 AAA/Aaa Federal National Mortgage Association, 7.0%, 7/1/21-1/1/32 272,828 3,674 AAA/Aaa Federal National Mortgage Association, 7.5%, 8/1/20-4/1/30 4,036 27,199 AAA/Aaa Federal National Mortgage Association, 8.0%, 4/1/20-5/1/31 32,882 1,906,852 AAA/Aaa Federal Home Loan Mortgage Corp., 4.5%, 3/1/20-10/1/20 2,036,879 8,301,694 AAA/Aaa Federal Home Loan Mortgage Corp., 5.0%, 10/1/20-10/1/38 8,952,039 3,595,072 AAA/Aaa Federal Home Loan Mortgage Corp., 5.5%, 12/1/18-11/1/35 3,929,958 8,658,489 AAA/Aaa Federal Home Loan Mortgage Corp., 6.0%, 5/1/17-12/1/36 9,595,845 613,219 AAA/Aaa Federal Home Loan Mortgage Corp., 6.5%, 3/1/13-4/1/34 699,762 645,044 AAA/Aaa Federal Home Loan Mortgage Corp., 7.0%, 8/1/22-11/1/30 704,365 10,150,180 AAA/Aaa Government National Mortgage Association I, 4.5%, 7/15/33-8/15/41 11,126,061 2,681,634 AAA/Aaa Government National Mortgage Association I, 5.0%, 10/15/18-4/15/34 2,960,160 11,111,215 AAA/Aaa Government National Mortgage Association I, 5.5%, 10/15/17-2/15/37 12,319,226 12,341,582 AAA/Aaa Government National Mortgage Association I, 6.0%, 8/15/13-10/15/33 13,983,337 3,982,426 AAA/Aaa Government National Mortgage Association I, 6.5%, 2/15/29-7/15/35 4,622,747 862,054 AAA/Aaa Government National Mortgage Association I, 7.0%, 12/15/13-5/15/32 1,037,042 150,808 AAA/Aaa Government National Mortgage Association I, 7.5%, 2/15/26-12/15/31 177,173 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/12 45 Schedule of Investments | 6/30/12 (continued) ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate(b) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AND AGENCY OBLIGATIONS -- (continued) 5,323 AAA/Aaa Government National Mortgage Association I, 7.75%, 2/15/30 $ 5,855 6,425,123 AAA/Aaa Government National Mortgage Association II, 4.5%, 12/20/34-9/20/41 7,101,363 2,268,777 AAA/Aaa Government National Mortgage Association II, 5.5%, 10/20/19-4/20/34 2,502,574 68,611 AAA/Aaa Government National Mortgage Association II, 6.5%, 2/20/29-4/20/29 79,570 305,703 AAA/Aaa Government National Mortgage Association II, 7.0%, 11/20/28-12/20/30 366,581 7,620,000 AA+/Aaa U.S. Treasury Bonds, 4.25%, 5/15/39 9,952,436 1,365,000 AA+/Aaa U.S. Treasury Bonds, 4.375%, 11/15/39 1,818,222 5,450,000 AA+/Aaa U.S. Treasury Bonds, 4.375%, 2/15/38 7,231,469 2,000,000 AA+/Aaa U.S. Treasury Bonds, 4.375%, 5/15/40 2,665,312 7,340,000 AA+/Aaa U.S. Treasury Bonds, 4.5%, 2/15/36 9,858,538 8,435,000 AA+/Aaa U.S. Treasury Bonds, 4.5%, 5/15/38 11,409,653 9,068,000 AA+/Aaa U.S. Treasury Bonds, 4.5%, 8/15/39 12,304,163 4,000,000 AA+/Aaa U.S. Treasury Bonds, 4.625%, 2/15/40 5,533,124 5,100,000 AA+/Aaa U.S. Treasury Bonds, 5.25%, 11/15/28 7,177,454 4,000,000 AA+/Aaa U.S. Treasury Bonds, 5.375%, 2/15/31 5,828,752 840,000 AA+/Aaa U.S. Treasury Bonds, 5.5%, 8/15/28 1,209,206 4,750,000 AA+/Aaa U.S. Treasury Bonds, 6.25%, 8/15/23 6,899,375 450,000 AA+/Aaa U.S. Treasury Bonds, 7.875%, 2/15/21 688,360 8,000,000 AA+/Aaa U.S. Treasury Notes, 2.125%, 8/15/21 8,408,752 2,700,000 AA+/Aaa U.S. Treasury Notes, 2.625%, 11/15/20 2,967,681 8,750,000 AA+/Aaa U.S. Treasury Notes, 2.75%, 2/15/19 9,710,452 6,380,000 AA+/Aaa U.S. Treasury Notes, 3.125%, 5/15/19 7,251,266 ------------------------------------------------------------------------------------------------------- TOTAL U.S. GOVERNMENT AND AGENCY OBLIGATIONS (Cost $249,441,457) $ 280,516,205 ------------------------------------------------------------------------------------------------------- FOREIGN GOVERNMENT BONDS -- 0.3% 4,600,000 BBB/Baa1 Russian Federation, 4.5%, 4/4/22 (144A) $ 4,819,006 ------------------------------------------------------------------------------------------------------- TOTAL FOREIGN GOVERNMENT BONDS (Cost $4,567,381) $ 4,819,006 ------------------------------------------------------------------------------------------------------- MUNICIPAL BONDS -- 6.8% Municipal Airport -- 0.1% 1,000,000 BBB/Baa1 Indianapolis Airport Authority, 5.1%, 1/15/17 $ 1,132,060 ------------------------------------------------------------------------------------------------------- Municipal Development -- 0.8% 2,925,000 AA-/Aa3 California Statewide Communities Development Authority, 6.0%, 8/15/42 $ 3,445,065 The accompanying notes are an integral part of these financial statements. 46 Pioneer Bond Fund | Annual Report | 6/30/12 ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate(b) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- Municipal Development -- (continued) 2,350,000 BBB-/Baa3 Louisiana Local Government Environmental Facilities & Community Development Authority, 6.5%, 11/1/35 $ 2,691,902 2,560,000 BBB/Baa2 Parish of St John the Baptist Louisiana, 5.125%, 6/1/37 2,676,966 2,310,000 BBB/Baa3 Selma Industrial Development Board, 5.8%, 5/1/34 2,511,917 -------------- $ 11,325,850 ------------------------------------------------------------------------------------------------------- Municipal General -- 0.4% 2,750,000 A+/A1 New Jersey Transportation Trust Fund Authority, 5.5%, 6/15/41 $ 3,172,180 2,400,000 AAA/Aa1 New York City Transitional Finance Authority Future Tax Secured Revenue, 5.0%, 11/1/33 2,706,408 -------------- $ 5,878,588 ------------------------------------------------------------------------------------------------------- Higher Municipal Education -- 3.3% 4,380,000 AA-/Aa2 California State University, 5.0%, 11/1/39 $ 4,683,446 3,000,000 AAA/Aaa Connecticut State Health & Educational Facility Authority, 5.0%, 7/1/40 3,327,510 4,600,000 AAA/Aaa Connecticut State Health & Educational Facility Authority, 5.0%, 7/1/42 5,123,250 2,300,000 AAA/Aaa Houston Higher Education Finance Corp., 4.5%, 11/15/37 2,415,230 1,500,000 AAA/Aaa Houston Higher Education Finance Corp., 5.0%, 5/15/40 1,704,540 1,100,000 AA/Aa1 Illinois Finance Authority, 5.0%, 10/1/51 1,202,124 1,200,000 AAA/Aaa Massachusetts Development Finance Agency, 5.0%, 10/15/40 1,375,020 6,500,000 AAA/Aaa Massachusetts Health & Educational Facilities Authority, 5.5%, 11/15/36 7,812,545 1,425,000 AAA/Aaa Massachusetts Health & Educational Facilities Authority, 5.5%, 7/1/32 1,971,131 1,000,000 AAA/Aaa Massachusetts Health & Educational Facilities Authority, 6.0%, 7/1/36 1,222,760 2,850,000 AAA/Aaa Missouri State Health & Educational Facilities Authority, 5.0%, 11/15/39 3,206,564 2,590,000 AAA/Aaa New York State Dormitory Authority, 5.0%, 10/1/41 2,964,695 2,150,000 AA/Aa1 New York State Dormitory Authority, 5.0%, 7/1/35 2,434,380 3,700,000 AAA/Aaa New York State Dormitory Authority, 5.0%, 7/1/38 4,171,972 1,600,000 AA/Aa1 New York State Dormitory Authority, 5.0%, 7/1/40 1,792,384 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/12 47 Schedule of Investments | 6/30/12 (continued) ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate(b) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- Higher Municipal Education -- (continued) 800,000 AAA/Aaa Permanent University Fund, 5.0%, 7/1/30 $ 977,048 525,000 AAA/Aaa University of Texas System, 5.0%, 8/15/43 603,236 -------------- $ 46,987,835 ------------------------------------------------------------------------------------------------------- Municipal Medical -- 0.1% 325,000 AA-/A1 Massachusetts Development Finance Agency, 5.25%, 4/1/37 $ 358,780 550,000 AA-/A1 Massachusetts Development Finance Agency, 5.375%, 4/1/41 607,502 -------------- $ 966,282 ------------------------------------------------------------------------------------------------------- Municipal Utility District -- 0.3% 4,060,000 AA-/Aa3 South Carolina State Public Service Authority, 5.0%, 12/1/43 $ 4,519,876 ------------------------------------------------------------------------------------------------------- Municipal Pollution -- 0.4% 995,000 BBB+/Baa1 County of Sweetwater Wyoming, 5.6%, 12/1/35 $ 1,053,247 980,000 BBB/Baa3 Courtland Industrial Development Board, 5.0%, 8/1/27 982,313 3,965,000 5.95 BBB/NR Port Freeport Texas, Floating Rate Note, 5/15/33 4,391,555 -------------- $ 6,427,115 ------------------------------------------------------------------------------------------------------- Municipal Transportation -- 0.1% 1,600,000 AA/Aa2 Harris County. Metropolitan Transit Authority, 5.0%, 11/1/41 $ 1,789,712 ------------------------------------------------------------------------------------------------------- Municipal Water -- 1.1% 2,400,000 AAA/Aa1 City of Charleston South Carolina, 5.0%, 1/1/35 $ 2,756,040 2,800,000 AAA/Aa1 City of Charleston South Carolina, 5.0%, 1/1/41 3,179,400 3,275,000 AA-/Aa3 City of San Francisco California Public Utilities Commission Water Revenue, 5.0%, 11/1/37 3,628,995 800,000 AAA/Aa2 Hampton Roads Sanitation District, 5.0%, 4/1/38 869,848 1,415,000 AAA/Aaa Metropolitan Water Reclamation District of Greater Chicago, 5.0%, 12/1/30 1,648,277 1,200,000 AAA/Aaa Metropolitan Water Reclamation District of Greater Chicago, 5.0%, 12/1/32 1,383,972 1,750,000 AAA/NR Tarrant Regional Water District, 5.0%, 3/1/52 1,936,480 -------------- $ 15,403,012 ------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 48 Pioneer Bond Fund | Annual Report | 6/30/12 ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate(b) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- Municipal Obligation -- 0.2% 1,660,000 AA+/Aa1 State of Washington, 5.0%, 7/1/18 $ 2,012,119 1,400,000 AA+/Aa1 State of Washington, 5.0%, 8/1/39 1,566,866 -------------- $ 3,578,985 ------------------------------------------------------------------------------------------------------- TOTAL MUNICIPAL BONDS (Cost $88,304,282) $ 98,009,315 ------------------------------------------------------------------------------------------------------- SENIOR FLOATING RATE LOAN INTERESTS -- 6.4%** ENERGY -- 0.4% Oil & Gas Equipment & Services -- 0.1% 960,484 9.00 B-/B2 Hudson Products Holdings, Inc., Term Loan, 8/24/15 $ 864,436 ------------------------------------------------------------------------------------------------------- Integrated Oil & Gas -- 0.2% 2,846,919 4.50 BBB/Baa2 Glenn Pool Oil & Gas Trust, Term Loan, 6/1/16 $ 2,846,919 ------------------------------------------------------------------------------------------------------- Oil & Gas Refining & Marketing -- 0.1% 1,457,053 4.25 BBB-/Ba2 Pilot Travel Centers LLC, Initial Tranche B Term Loan, 3/7/18 $ 1,459,482 -------------- Total Energy $ 5,170,837 ------------------------------------------------------------------------------------------------------- MATERIALS -- 0.3% Commodity Chemicals -- 0.1% 785,714 4.25 NR/Ba2 Tronox, Inc., Closing Date Term Loan, 1/24/17 $ 774,666 214,286 4.25 NR/Ba2 Tronox, Inc., Delayed Draw Term Loan, 1/24/17 210,871 -------------- $ 985,537 ------------------------------------------------------------------------------------------------------- Diversified Chemicals -- 0.0%+ 198,342 3.22 BBB-/Ba1 Celanese US Holdings LLC, Dollar Term C Loan (Extended), 10/31/16 $ 198,997 ------------------------------------------------------------------------------------------------------- Specialty Chemicals -- 0.1% 1,620,000 5.50 BB+/Ba1 Chemtura Corp., Term Facility, 8/11/16 $ 1,626,075 259,927 2.85 BB+/Ba1 Huntsman International LLC, Extended Term B Loan, 4/19/17 255,053 -------------- $ 1,881,128 ------------------------------------------------------------------------------------------------------- Metal & Glass Containers -- 0.0%+ 423,574 4.50 B/Ba3 BWAY Holding Co., Replacement B Term Loan, 2/9/18 $ 421,191 42,688 4.50 B/Ba3 ICL Industrial Containers ULC, Replacement C Term Loan, 2/9/18 42,448 -------------- $ 463,639 ------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/12 49 Schedule of Investments | 6/30/12 (continued) ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate(b) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- Precious Metals & Minerals -- 0.1% 1,348,500 5.25 BB-/B1 Fairmount Minerals, Ltd., Tranche B Term Loan, 3/1/17 $ 1,342,600 -------------- Total Materials $ 4,871,901 ------------------------------------------------------------------------------------------------------- CAPITAL GOODS -- 0.5% Aerospace & Defense -- 0.5% 1,641,750 5.75 BB+/Ba3 DigitalGlobe, Inc., Term Loan, 9/21/18 $ 1,624,914 987,521 5.47 B/B2 Dubai Aerospace Enterprise (DAE), Tranche B-1 Loan, 7/31/14 977,646 938,990 5.47 B/B2 Dubai Aerospace Enterprise (DAE), Tranche B-2 Loan, 7/31/14 929,600 947,901 6.29 BB-/Ba2 DynCorp International, Inc., Term Loan, 7/7/16 948,296 648,375 3.75 BBB-/Ba1 Spirit Aerosystems, Inc., Term B Loan, 3/27/19 649,794 1,581,194 4.50 BB-/B1 Tasc, Inc., New Tranche B Term Loan, 4/25/15 1,555,500 -------------- $ 6,685,750 -------------- Total Capital Goods $ 6,685,750 ------------------------------------------------------------------------------------------------------- COMMERCIAL SERVICES & SUPPLIES -- 0.2% Environmental & Facilities Services -- 0.2% 2,576,992 2.25 CCC+/Caa1 Synagro Technologies, Inc., Term Loan (First Lien), 4/2/14 $ 2,254,868 ------------------------------------------------------------------------------------------------------- Office Services & Supplies -- 0.0% 621,875 4.25 BB+/Ba1 ACCO Brands Corp., Term B Loan, 1/4/19 $ 621,875 -------------- Total Commercial Services & Supplies $ 2,876,743 ------------------------------------------------------------------------------------------------------- TRANSPORTATION -- 0.1% Air Freight & Logistics -- 0.1% 462,700 0.00 NR/NR CEVA Group Plc, Dollar Tranche B Pre Funded L/C, 8/31/16 $ 436,866 351,403 5.47 NR/NR CEVA Group Plc, EGL Tranche B Term Loan, 8/31/16 332,626 843,532 5.47 NR/Ba3 CEVA Group Plc, US Tranche B Term Loan, 8/31/16 796,435 -------------- $ 1,565,927 -------------- Total Transportation $ 1,565,927 ------------------------------------------------------------------------------------------------------- AUTOMOBILES & COMPONENTS -- 1.0% Auto Parts & Equipment -- 0.4% 1,013,598 2.75 BB-/Ba3 Allison Transmission, Inc., Term B-1 Loan, 8/7/14 $ 1,003,459 1,607,026 3.50 BBB/Baa2 Delphi Automotive LLP, Tranche B Term Loan, 3/31/17 1,607,026 The accompanying notes are an integral part of these financial statements. 50 Pioneer Bond Fund | Annual Report | 6/30/12 ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate(b) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- Auto Parts & Equipment -- (continued) 1,058,243 2.18 B+/Ba3 Federal-Mogul Corp., Tranche B Term Loan, 12/29/14 $ 1,009,520 539,920 2.18 B+/Ba3 Federal-Mogul Corp., Tranche C Term Loan, 12/28/15 515,061 842,888 6.75 NR/NR TI Group Automotive Systems LLC, Term Loan, 3/1/19 820,410 715,570 4.25 BB/Ba2 Tomkins LLC, Term B-1 Loan, 9/21/16 716,166 -------------- $ 5,671,642 ------------------------------------------------------------------------------------------------------- Tires & Rubber -- 0.3% 4,190,000 4.75 BB/Ba1 The Goodyear Tire & Rubber Co., Loan (Second Lien), 3/27/19 $ 4,100,962 ------------------------------------------------------------------------------------------------------- Automobile Manufacturers -- 0.3% 3,875,850 6.00 BB/Ba2 Chrysler Group LLC, Tranche B Term Loan, 4/28/17 $ 3,909,523 -------------- Total Automobiles & Components $ 13,682,127 ------------------------------------------------------------------------------------------------------- CONSUMER SERVICES -- 0.2% Casinos & Gaming -- 0.1% 1,072,313 4.00 BB+/Ba1 Pinnacle Entertainment, Inc., Series A Term Loan, 3/5/19 $ 1,070,805 ------------------------------------------------------------------------------------------------------- Restaurants -- 0.1% 992,913 4.50 BB-/Ba3 Burger King Holdings, Inc., Tranche B Term Loan, 10/30/16 $ 990,013 ------------------------------------------------------------------------------------------------------- Specialized Consumer Services -- 0.0%+ 327,367 7.00 B+/B1 Web Service Co. LLC, Term Loan, 9/28/14 $ 326,139 -------------- Total Consumer Services $ 2,386,957 ------------------------------------------------------------------------------------------------------- MEDIA -- 0.9% Advertising -- 0.1% 1,092,504 5.00 B+/Ba3 Affinion Group, Inc., Tranche B Term Loan, 10/9/16 $ 997,593 ------------------------------------------------------------------------------------------------------- Broadcasting -- 0.2% 2,884,687 4.50 B+/B2 Univision Communications, Inc., Extended First-Lien Term Loan, 3/29/17 $ 2,725,129 ------------------------------------------------------------------------------------------------------- Cable & Satellite -- 0.3% 3,130,210 3.50 BB+/Ba1 Charter Communications Operating LLC, Term C Loan, 9/6/16 $ 3,109,776 922,688 4.00 BB+/Ba1 Charter Communications Operating LLC, Term D Loan, 3/28/19 918,305 615,205 2.75 B/B1 WideOpenWest LLC, Term Loan (First Lien), 6/30/14 611,206 -------------- $ 4,639,287 ------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/12 51 Schedule of Investments | 6/30/12 (continued) ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate(b) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- Movies & Entertainment -- 0.2% 917,796 5.25 NR/Ba1 Cinedigm Digital Funding I LLC, Term Loan, 3/31/16 $ 916,075 1,666,000 4.50 BB-/Ba2 Live Nation Entertainment, Inc., Term B Loan, 10/20/16 1,666,000 -------------- $ 2,582,075 ------------------------------------------------------------------------------------------------------- Publishing -- 0.1% 2,287,834 4.50 B+/Ba3 Interactive Data Corp., Term B Loan, 1/31/18 $ 2,254,450 -------------- Total Media $ 13,198,534 ------------------------------------------------------------------------------------------------------- RETAILING -- 0.0%+ Apparel Retail -- 0.0%+ 530,000 4.75 NR/Ba2 Ascena Retail Group, Inc., Tranche B Term Loan, 5/17/18 $ 530,994 -------------- Total Retailing $ 530,994 ------------------------------------------------------------------------------------------------------- FOOD & STAPLES RETAILING -- 0.0%+ Food Retail -- 0.0%+ 349,480 2.77 B+/Ba3 Pinnacle Foods Group, Inc., Initial Term Loan, 4/19/14 $ 348,096 -------------- Total Food & Staples Retailing $ 348,096 ------------------------------------------------------------------------------------------------------- FOOD, BEVERAGE & TOBACCO -- 0.0%+ Packaged Foods & Meats -- 0.0%+ 305,963 4.50 BB/Ba2 B&G Foods, Inc., Tranche B Term Loan, 10/28/18 $ 307,110 -------------- Total Food, Beverage & Tobacco $ 307,110 ------------------------------------------------------------------------------------------------------- HOUSEHOLD & PERSONAL PRODUCTS -- 0.1% Personal Products -- 0.1% 861,429 4.25 BB-/Ba3 NBTY, Inc., Term B-1 Loan, 10/1/17 $ 859,571 -------------- Total Household & Personal Products $ 859,571 ------------------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 0.9% Health Care Supplies -- 0.2% 2,188,463 7.25 BB-/Ba3 Immucor, Inc., Term B Loan, 7/2/18 $ 2,206,244 ------------------------------------------------------------------------------------------------------- Health Care Services -- 0.0%+ 394,000 4.50 BB/Ba2 DaVita, Inc., Tranche B Term Loan, 10/20/16 $ 395,970 ------------------------------------------------------------------------------------------------------- Health Care Facilities -- 0.7% 1,604,807 6.50 B/B1 Ardent Medical Services, Inc., Term Loan, 9/15/15 $ 1,600,795 2,199,732 3.97 BB/Ba3 Community Health Systems, Inc., Extended Term Loan, 7/25/14 2,167,250 The accompanying notes are an integral part of these financial statements. 52 Pioneer Bond Fund | Annual Report | 6/30/12 ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate(b) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- Health Care Facilities -- (continued) 747,900 3.50 BB/Ba3 HCA Holdings, Inc., Tranche B-3 Term Loan, 5/1/18 $ 727,683 1,793,613 3.71 BB/Ba3 HCA, Inc., Tranche B-2 Term Loan, 3/17/17 1,746,371 1,671,600 4.50 BB-/Ba3 Health Management Associates, Inc., Term B Loan, 11/1/18 1,660,108 1,852,559 3.75 BB+/Ba2 Universal Health Services, Inc., Tranche B Term Loan 2011, 11/30/16 1,830,175 -------------- $ 9,732,382 ------------------------------------------------------------------------------------------------------- Health Care Technology -- 0.0% 464,320 4.50 BB/Ba3 IMS Health, Inc., Tranche B Dollar Term Loan (2011), 8/31/17 $ 462,463 -------------- Total Health Care Equipment & Services $ 12,797,059 ------------------------------------------------------------------------------------------------------- PHARMACEUTICALS, BIOTECHNOLOGY & LIFE SCIENCES -- 0.3% Biotechnology -- 0.1% 1,018,219 4.50 BB-/Ba3 Grifols, Inc., New U.S. Tranche B Term Loan, 6/4/17 $ 1,010,688 ------------------------------------------------------------------------------------------------------- Pharmaceuticals -- 0.0%+ 588,123 4.00 BBB-/Ba1 Endo Health Solutions, Inc., Term Loan B 2011, 4/14/18 $ 588,417 ------------------------------------------------------------------------------------------------------- Life Sciences Tools & Services -- 0.2% 2,729,168 4.25 BB-/Ba3 Catalent Pharma Solutions, Inc., Extended Dollar Term-1 Loan, 9/15/16 $ 2,713,817 -------------- Total Pharmaceuticals, Biotechnology & Life Sciences $ 4,312,922 ------------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 0.2% Other Diversified Financial Services -- 0.2% 1,729,718 4.00 BBB-/Baa2 RPI Finance Trust, 6.75 Year Term Loan, 4/13/18 $ 1,717,466 999,288 5.25 NR/Ba2 WorldPay, Facility B2A Term Loan, 8/6/17 999,601 -------------- $ 2,717,067 -------------- Total Diversified Financials $ 2,717,067 ------------------------------------------------------------------------------------------------------- INSURANCE -- 0.1% Insurance Brokers -- 0.1% 1,763,837 4.75 B+/B1 HUB International Holdings, Inc., 2017 Initial Term Loan (Extended), 6/13/17 $ 1,753,254 -------------- Total Insurance $ 1,753,254 ------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/12 53 Schedule of Investments | 6/30/12 (continued) ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate(b) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- SOFTWARE & SERVICES -- 0.2% Internet Software & Services -- 0.1% 1,402,250 4.00 BB+/Ba3 Autotrader.com, Inc., Tranche B-1 Term Loan, 12/15/16 $ 1,396,407 ------------------------------------------------------------------------------------------------------- IT Consulting & Other Services -- 0.1% 1,663,275 3.99 BB/NR SunGard Data Systems, Inc., Tranche C Term Loan, 2/28/17 $ 1,650,791 ------------------------------------------------------------------------------------------------------- Application Software -- 0.0%+ 380,174 3.25 BB+/Baa3 Nuance Communications, Inc., Term C Loan, 3/31/16 $ 379,858 ------------------------------------------------------------------------------------------------------- Systems Software -- 0.0%+ 198,621 3.75 BBB-/Ba2 The Reynolds & Reynolds Co., Tranche B Term Loan, 3/9/18 $ 197,752 -------------- Total Software & Services $ 3,624,808 ------------------------------------------------------------------------------------------------------- TECHNOLOGY HARDWARE & EQUIPMENT -- 0.3% Communications Equipment -- 0.1% 935,264 4.25 NR/NR CommScope, Inc., Tranche 1 Term Loan, 1/14/18 $ 932,926 ------------------------------------------------------------------------------------------------------- Electronic Components -- 0.2% 2,676,309 2.49 BB+/Ba2 Flextronics Semiconductor, Ltd., A Closing Date Loan, 10/1/14 $ 2,627,801 494,647 2.50 BB+/Ba2 Flextronics Semiconductor, Ltd., A-1-A Delayed Draw Loan, 10/1/14 485,682 314,835 2.50 BB+/Ba2 Flextronics Semiconductor, Ltd., A-2 Delayed Draw Loan, 10/1/14 309,129 367,308 2.49 BB+/Ba2 Flextronics Semiconductor, Ltd., A-3 Delayed Draw Loan, 10/1/14 360,650 -------------- $ 3,783,262 -------------- Total Technology Hardware & Equipment $ 4,716,188 ------------------------------------------------------------------------------------------------------- SEMICONDUCTORS & SEMICONDUCTOR EQUIPMENT -- 0.3% Semiconductor Equipment -- 0.2% 3,361,690 5.75 BB-/B1 Aeroflex, Inc., Tranche B Term Loan, 4/25/18 $ 3,252,435 ------------------------------------------------------------------------------------------------------- Semiconductors -- 0.1% 985,099 4.00 BB/Ba2 Microsemi Corp., Term Loan, 2/2/18 $ 974,017 510,000 4.25 BBB-/Ba2 Semtech Corp., B Term Loan, 2/21/17 510,000 -------------- $ 1,484,017 -------------- Total Semiconductors & Semiconductor Equipment $ 4,736,452 ------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 54 Pioneer Bond Fund | Annual Report | 6/30/12 ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate(b) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- TELECOMMUNICATION SERVICES -- 0.1% Wireless Telecommunication Services -- 0.1% 1,180,000 3.24 B/B3 Intelsat Jackson Holdings SA, Term Loan (Unsecured), 2/1/14 $ 1,155,220 -------------- Total Telecommunication Services $ 1,155,220 ------------------------------------------------------------------------------------------------------- UTILITIES -- 0.3% Electric Utilities -- 0.2% 4,044,646 4.74 CCC/B2 Texas Competitive Electric Holdings Co. LLC, 2017 Term Loan (Extending), 10/10/17 $ 2,426,399 ------------------------------------------------------------------------------------------------------- Independent Power Producers & Energy Traders -- 0.1% 1,356,300 4.00 BB+/Baa3 NRG Energy, Inc., Term Loan, 5/5/18 $ 1,349,896 -------------- Total Utilities $ 3,776,295 ------------------------------------------------------------------------------------------------------- TOTAL SENIOR FLOATING RATE LOAN INTERESTS (Cost $92,728,954) $ 92,073,812 ------------------------------------------------------------------------------------------------------- TEMPORARY CASH INVESTMENTS -- 3.7% Repurchase Agreements -- 3.7% 19,150,000 NR/Aaa Deutschebank AG, 0.2%, dated 6/29/12, repurchase price of $19,150,000 plus accrued interest on 7/2/12 collateralized by the following: $585,366 U.S. Treasury Bond, 2.0-3.375%, 11/15/26-4/15/32 $18,947,634 U.S. Treasury Strip, 0.0-2.625%, 8/5/12-2/15/42 $ 19,150,000 15,150,000 NR/Aaa JPMorgan, Inc., 0.18%, dated 6/29/12, repurchase price of $15,150,000 plus accrued interest on 7/2/12 collateralized by $15,453,235 Federal National Mortgage Association (ARM), 1.755-5.97%, 3/1/34-1/1/42 15,150,000 9,150,000 NR/Aaa RBC Capital Markets, Inc., 0.14%, dated 6/29/12, repurchase price of $9,150,000 plus accrued interest on 7/2/12 collateralized by $9,333,000 Government National Mortgage Association I, 3.5-5.5%, 2/15/40-6/20/42 9,150,000 TD Securities, Inc., 0.14%, dated 6/29/12, repurchase price of $9,150,000 plus accrued interest on 7/2/12 collateralized by $9,333,073 U.S. Treasury Bond, 2.625-4.5%, 7/31/14-5/15/38 9,150,000 -------------- $ 52,600,000 ------------------------------------------------------------------------------------------------------- TOTAL TEMPORARY CASH INVESTMENTS (Cost $52,600,000) $ 52,600,000 ------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/12 55 Schedule of Investments | 6/30/12 (continued) ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate(b) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- TOTAL INVESTMENT IN SECURITIES -- 98.7% (Cost $1,343,642,719) (a) $ 1,414,726,320 ------------------------------------------------------------------------------------------------------- OTHER ASSETS & LIABILITIES -- 1.3% $ 18,884,115 ======================================================================================================= TOTAL NET ASSETS -- 100.0% $ 1,433,610,435 ======================================================================================================= CREDIT DEFAULT SWAP AGREEMENTS ------------------------------------------------------------------------------------------------------- Notional Swap Counterparty/ Principal($) Referenced Obligation Unrealized Loss ------------------------------------------------------------------------------------------------------- 14,000,000 JPMorgan Chase & Co., Index: Markit CDX.NA.IG.18, 1.0%, 6/20/17 $ (76,622) ------------------------------------------------------------------------------------------------------- TOTAL CREDIT DEFAULT SWAP AGREEMENTS (Cost $16,039) $ (76,622) ------------------------------------------------------------------------------------------------------- NR Not rated by either S&P or Moody's. WR Withdrawn rating. + Rounds to less than 0.05% (144A) Security is exempt from registration under Rule 144A of the Securities Act of 1933. Such securities may be resold normally to qualified institutional buyers in a transaction exempt from registration. At June 30, 2012, the value of these securities amounted to $272,925,998 or 19.0% of total net assets. ** Senior floating rate loan interests in which the Fund invests generally pay interest at rates that are periodically redetermined by reference to a base lending rate plus a premium. These base lending rates are generally (i) the lending rate offered by one or more major European banks, such as LIBOR (London InterBank Offered Rate), (ii) the prime rate offered by one or more major U.S. banks, (iii) the certificate of deposit or (iv) other base lending rates used by commercial lenders. The rate shown is the coupon rate at period end. (a) At June 30, 2012, the net unrealized gain on investments based on cost for federal income tax purposes of $1,342,848,808 was as follows: Aggregate gross unrealized gain for all investments in which there is an excess of value over tax cost $ 100,227,036 Aggregate gross unrealized loss for all investments in which there is an excess of tax cost over value (28,349,524) ------------- Net unrealized gain $ 71,877,512 ============= (b) Debt obligation with a variable interest rate. Rate shown is rate at end of period. (c) Security represents the interest only portion of payments on a pool of underlying mortgages or mortgage-backed securities. Purchases and sales of securities (excluding temporary cash investments) for the year ended June 30, 2012 were as follows: -------------------------------------------------------------------------------- Purchases Sales -------------------------------------------------------------------------------- Long-Term U.S. Government Securities $ 61,040,330 $ 63,442,208 Other Long-Term Securities $ 290,578,556 $ 212,555,908 The accompanying notes are an integral part of these financial statements. 56 Pioneer Bond Fund | Annual Report | 6/30/12 Various inputs are used in determining the value of the Fund's investments. These inputs are summarized in the three broad levels listed below. Level 1 - quoted prices in active markets for identical securities Level 2 - other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.) Level 3 - significant unobservable inputs (including the Fund's own assumptions in determining fair value of investments) Generally, equity securities are categorized as Level 1, fixed income securities and senior loans as Level 2 and securities valued using fair value methods (other than prices supplied by independent pricing services) as Level 3. See Notes to Financial Statements - Note 1A. The following is a summary of the inputs used as of June 30, 2012, in valuing the Fund's assets: ------------------------------------------------------------------------------------------------- Level 1 Level 2 Level 3 Total ------------------------------------------------------------------------------------------------- Convertible Corporate Bonds $ -- $ 8,385,314 $ -- $ 8,385,314 Preferred Stocks 15,216,385 -- -- 15,216,385 Convertible Preferred Stocks 6,311,250 7,961,800 -- 14,273,050 Asset Backed Securities -- 78,169,875 -- 78,169,875 Collateralized Mortgage Obligations -- 254,390,773 -- 254,390,773 Corporate Bonds -- 516,272,585 -- 516,272,585 U.S. Government Agency Obligations -- 280,516,205 -- 280,516,205 Foreign Government Bonds -- 4,819,006 -- 4,819,006 Municipal Bonds -- 98,009,315 -- 98,009,315 Senior Floating Rate Loan Interests -- 92,073,812 -- 92,073,812 Repurchase Agreements -- 52,600,000 -- 52,600,000 ------------------------------------------------------------------------------------------------- Total $21,527,635 $1,393,198,685 $ -- $1,414,726,320 ================================================================================================= Other Financial Instruments* $ 331,690 $ (76,622) $ -- $ 255,068 ================================================================================================= * Other financial instruments include futures contracts and credit default swaps. Following is a reconciliation of assets using significant unobservable inputs (Level 3): -------------------------------------------------------------------------------- Collateralized Mortgage Obligations -------------------------------------------------------------------------------- Balance as of 6/30/11 $ 232,842 Realized gain (loss)1 -- Change in unrealized appreciation (depreciation)2 -- Net purchases (sales) -- Transfers in and out of Level 3** (232,842) -------------------------------------------------------------------------------- Balance as of 6/30/12 $ -- ================================================================================ 1 Realized gain (loss) on these securities is included in the net realized gain (loss) from investments in the Statement of Operations. 2 Unrealized appreciation (depreciation) on these securities is included in the change in unrealized gain (loss) on investments in the Statement of Operations. ** Transfers are calculated on the beginning of period values. The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/12 57 Statement of Assets and Liabilities | 6/30/12 ASSETS: Investment in securities (cost $1,343,642,719) $1,414,726,320 Cash 6,865,345 Futures Collateral 810,325 Receivables -- Investment securities sold 73,382 Fund shares sold 12,889,277 Interest 12,211,669 Dividends 109,230 Due from Pioneer Investment Management, Inc. 116,703 Variation margin 326,119 Other 47,258 ----------------------------------------------------------------------------------------- Total assets $1,448,175,628 ========================================================================================= LIABILITIES: Payables -- Investment securities purchased $ 9,138,590 Fund shares repurchased 3,022,910 Dividends 1,880,333 Credit default swaps, premiums received 3,405 Unrealized depreciation on credit default swaps 76,622 Due to affiliates 312,874 Accrued expenses 130,459 ----------------------------------------------------------------------------------------- Total liabilities $ 14,565,193 ========================================================================================= NET ASSETS: Paid-in capital $1,382,117,378 Distributions in excess of net investment income (1,392,581) Accumulated net realized loss on investments and futures contracts (18,453,031) Net unrealized gain on investments 71,083,601 Net unrealized loss on credit default swaps (76,622) Net unrealized gain on futures contracts 331,690 ----------------------------------------------------------------------------------------- Total net assets $1,433,610,435 ========================================================================================= NET ASSET VALUE PER SHARE: (No par value, unlimited number of shares authorized) Class A (based on $453,772,382/46,626,208 shares) $ 9.73 Class B (based on $12,941,582/1,337,728 shares) $ 9.67 Class C (based on $93,737,142/9,736,176 shares) $ 9.63 Class R (based on $23,892,191/2,433,397 shares) $ 9.82 Class Y (based on $847,071,630/87,816,999 shares) $ 9.65 Class Z (based on $2,195,508/225,063 shares) $ 9.76 MAXIMUM OFFERING PRICE: Class A ($9.73 / 95.5% ) $ 10.19 ----------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 58 Pioneer Bond Fund | Annual Report | 6/30/12 Statement of Operations For the Year Ended 6/30/12 INVESTMENT INCOME: Interest $ 68,544,429 Dividends 1,276,487 Income from securities loaned, net 34,712 --------------------------------------------------------------------------------------------------- Total investment income $ 69,855,628 =================================================================================================== EXPENSES: Management fees $ 6,527,411 Transfer agent fees Class A 338,972 Class B 55,343 Class C 50,601 Class R 8,200 Class Y 85,385 Class Z 694 Distribution fees Class A 1,096,614 Class B 156,312 Class C 901,524 Class R 103,420 Shareholder communications expense 1,325,859 Administrative reimbursements 386,572 Custodian fees 45,895 Registration fees 190,897 Professional fees 114,809 Printing expense 61,476 Fees and expenses of nonaffiliated Trustees 41,729 Miscellaneous 161,729 --------------------------------------------------------------------------------------------------- Total expenses $ 11,653,442 Less fees waived and expenses reimbursed by Pioneer Investment Management, Inc. (824,894) --------------------------------------------------------------------------------------------------- Net expenses $ 10,828,548 --------------------------------------------------------------------------------------------------- Net investment income $ 59,027,080 --------------------------------------------------------------------------------------------------- Net realized gain (loss) on: Investments $ 1,714,669 Class action 17,845 Futures contracts (2,084,350) Credit default swaps 16,333 $ (335,503) --------------------------------------------------------------------------------------------------- Change in net unrealized gain (loss) on: Investments $ 17,693,125 Futures contracts 309,609 Credit default swaps (76,622) $17,926,112 --------------------------------------------------------------------------------------------------- Net gain on investments and futures contracts $ 17,590,609 --------------------------------------------------------------------------------------------------- Net increase in net assets resulting from operations $ 76,617,689 =================================================================================================== The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/12 59 Statement of Changes in Net Assets -------------------------------------------------------------------------------------------------- Year Ended Year Ended 6/30/12 6/30/11 -------------------------------------------------------------------------------------------------- FROM OPERATIONS: Net investment income $ 59,027,080 $ 58,916,585 Net realized gain on investments and futures contracts (335,503) 19,978,053 Change in net unrealized gain on investments, credit default swaps and futures contracts 17,926,112 6,496,838 -------------------------------------------------------------------------------------------------- Net increase in net assets resulting from operations $ 76,617,689 $ 85,391,476 -------------------------------------------------------------------------------------------------- DISTRIBUTIONS TO SHAREOWNERS: Net investment income: Class A ($0.43 and $0.44 per share, respectively) $ (19,730,298) $ (19,115,565) Class B ($0.33 and $0.34 per share, respectively) (543,288) (814,135) Class C ($0.35 and $0.35 per share, respectively) (3,283,618) (3,061,924) Class R ($0.40 and $0.41 per share, respectively) (844,452) (841,089) Class Y ($0.45 and $0.46 per share, respectively) (36,596,527) (33,941,983) Class Z ($0.46 and $0.46 per share, respectively) (63,937) (34,116) Net realized gain: Class A ($0.05 and $0.00 per share, respectively) (2,175,260) -- Class B ($0.05 and $0.00 per share, respectively) (84,708) -- Class C ($0.05 and $0.00 per share, respectively) (468,609) -- Class R ($0.05 and $0.00 per share, respectively) (100,096) -- Class Y ($0.05 and $0.00 per share, respectively) (4,001,897) -- Class Z ($0.05 and $0.00 per share, respectively) (4,956) -- -------------------------------------------------------------------------------------------------- Total distributions to shareowners $ (67,897,646) $ (57,808,812) -------------------------------------------------------------------------------------------------- FROM FUND SHARE TRANSACTIONS: Net proceeds from sale or exchange of shares $ 495,304,090 $ 502,805,760 Reinvestment of distributions 41,060,757 31,046,676 Cost of shares repurchased (452,496,717) (483,127,000) -------------------------------------------------------------------------------------------------- Net increase in net assets resulting from Fund share transactions $ 83,868,130 $ 50,725,436 -------------------------------------------------------------------------------------------------- Net increase in net assets $ 92,588,173 $ 78,308,100 NET ASSETS: Beginning of period 1,341,022,262 1,262,714,162 -------------------------------------------------------------------------------------------------- End of period $1,433,610,435 $1,341,022,262 ================================================================================================== Undistributed (distributions in excess of) net investment income $ (1,392,581) $ 575,991 ================================================================================================== The accompanying notes are an integral part of these financial statements. 60 Pioneer Bond Fund | Annual Report | 6/30/12 ------------------------------------------------------------------------------------------------ '12 Shares '12 Amount '11 Shares '11 Amount ------------------------------------------------------------------------------------------------ CLASS A Shares sold 16,727,695 $ 161,640,303 27,278,290 $ 263,115,680 Reinvestment of distributions 1,828,665 17,631,168 1,589,792 15,316,927 Less shares repurchased (23,798,695) (230,385,873) (21,554,132) (207,161,586) ------------------------------------------------------------------------------------------------ Net increase (decrease) (5,242,335) $ (51,114,402) 7,313,950 $ 71,271,021 ================================================================================================ CLASS B Shares sold or exchanged 247,924 $ 2,395,584 222,239 $ 2,121,453 Reinvestment of distributions 60,804 582,295 77,652 743,038 Less shares repurchased (895,246) (8,592,690) (1,289,045) (12,303,562) ------------------------------------------------------------------------------------------------ Net decrease (586,518) $ (5,614,811) (989,154) $ (9,439,071) ================================================================================================ CLASS C Shares sold 3,526,577 $ 33,738,657 2,737,693 $ 26,073,411 Reinvestment of distributions 270,485 2,578,644 213,686 2,036,474 Less shares repurchased (2,738,794) (26,122,885) (3,040,932) (28,890,255) ------------------------------------------------------------------------------------------------ Net increase (decrease) 1,058,268 $ 10,194,416 (89,553) $ (780,370) ================================================================================================ CLASS R Shares sold 1,408,283 $ 13,985,377 1,314,257 $ 12,751,688 Reinvestment of distributions 80,268 780,766 63,853 620,735 Less shares repurchased (1,160,309) (11,320,599) (1,182,197) (11,480,126) ------------------------------------------------------------------------------------------------ Net increase (decrease) 328,242 $ 3,445,544 195,913 $ 1,892,297 ================================================================================================ CLASS Y Shares sold 29,204,230 $ 277,000,768 20,798,206 $ 198,381,546 Reinvestment of distributions 2,032,263 19,420,618 1,288,384 12,308,045 Less shares repurchased (18,352,855) (175,882,776) (23,425,218) (222,959,013) ------------------------------------------------------------------------------------------------ Net increase (decrease) 12,883,638 $ 120,538,610 (1,338,628) $ (12,269,422) ================================================================================================ CLASS Z Shares sold 156,608 $ 6,543,401 37,285 $ 361,982 Reinvestment of distributions 6,949 67,266 2,220 21,457 Less shares repurchased (19,851) (191,894) (34,264) (332,458) ------------------------------------------------------------------------------------------------ Net increase 143,706 $ 6,418,773 5,241 $ 50,981 ================================================================================================ The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/12 61 Financial Highlights -------------------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 6/30/12 6/30/11 6/30/10 6/30/09 6/30/08 -------------------------------------------------------------------------------------------------------------------------- Class A Net asset value, beginning of period $ 9.66 $ 9.44 $ 8.63 $ 9.10 $ 8.95 -------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income $ 0.42 $ 0.45 $ 0.45 $ 0.50 $ 0.43 Net realized and unrealized gain (loss) on investments 0.13 0.21 0.80 (0.31) 0.16 -------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 0.55 $ 0.66 $ 1.25 $ 0.19 $ 0.59 -------------------------------------------------------------------------------------------------------------------------- Distributions to shareowners: Net investment income (0.43) (0.44) (0.44) (0.55) (0.44) Net realized gain (0.05) -- -- (0.11) -- -------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 0.07 $ 0.22 $ 0.81 $ (0.47) $ 0.15 -------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.73 $ 9.66 $ 9.44 $ 8.63 $ 9.10 ========================================================================================================================== Total return* 5.91% 7.08% 14.71% 2.65% 6.64% Ratio of net expenses to average net assets+ 0.85% 0.85% 0.85% 0.89%(a) 1.00% Ratio of net investment income to average net assets+ 4.35% 4.63% 4.86% 5.88% 4.60% Portfolio turnover rate 21% 36% 41% 34% 73% Net assets, end of period (in thousands) $453,772 $500,905 $420,706 $320,036 $265,959 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses 1.03% 1.06% 1.07% 1.09% 1.04% Net investment income 4.17% 4.42% 4.64% 5.68% 4.56% Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 0.85% 0.85% 0.85% 0.89%(a) 1.00% Net investment income 4.35% 4.63% 4.86% 5.88% 4.60% -------------------------------------------------------------------------------------------------------------------------- * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period, and no sales charges. Total return would be reduced if sales charges were taken into account. + Ratio with no reduction for fees paid indirectly. (a) On October 1, 2008, Pioneer contractually lowered Class A shares' expense limitation from 1.00% to 0.85% of the average daily net assets attributable to Class A shares. The expense limit will be in effect through November 1, 2013. The accompanying notes are an integral part of these financial statements. 62 Pioneer Bond Fund | Annual Report | 6/30/12 ----------------------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 6/30/12 6/30/11 6/30/10 6/30/09 6/30/08 ----------------------------------------------------------------------------------------------------------------------------- Class B Net asset value, beginning of period $ 9.60 $ 9.38 $ 8.58 $ 9.05 $ 8.90 ----------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income $ 0.31 $ 0.35 $ 0.35 $ 0.42 $ 0.34 Net realized and unrealized gain (loss) on investments 0.14 0.21 0.79 (0.31) 0.16 ----------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 0.45 $ 0.56 $ 1.14 $ 0.11 $ 0.50 ----------------------------------------------------------------------------------------------------------------------------- Distributions to shareowners: Net investment income (0.33) (0.34) (0.34) (0.47) (0.35) Net realized gain (0.05) -- -- (0.11) -- ----------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 0.07 $ 0.22 $ 0.80 $ (0.47) $ 0.15 ----------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.67 $ 9.60 $ 9.38 $ 8.58 $ 9.05 ============================================================================================================================= Total return* 4.82% 5.99% 13.47% 1.62% 5.70% Ratio of net expenses to average net assets+ 1.90% 1.90% 1.90% 1.90% 1.90% Ratio of net investment income to average net assets+ 3.31% 3.59% 3.89% 4.90% 3.72% Portfolio turnover rate 21% 36% 41% 34% 73% Net assets, end of period (in thousands) $12,942 $18,474 $27,342 $31,738 $34,106 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses 2.02% 1.95% 1.98% 1.99% 1.90% Net investment income 3.19% 3.54% 3.81% 4.81% 3.72% Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 1.90% 1.90% 1.90% 1.90% 1.89% Net investment income 3.31% 3.59% 3.89% 4.90% 3.73% ----------------------------------------------------------------------------------------------------------------------------- * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period, and no sales charges. Total return would be reduced if sales charges were taken into account. + Ratio with no reduction for fees paid indirectly. The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/12 63 Financial Highlights (continued) ----------------------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 6/30/12 6/30/11 6/30/10 6/30/09 6/30/08 ----------------------------------------------------------------------------------------------------------------------------- Class C Net asset value, beginning of period $ 9.55 $ 9.34 $ 8.54 $ 9.02 $ 8.87 ----------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income $ 0.33 $ 0.36 $ 0.37 $ 0.42 $ 0.35 Net realized and unrealized gain (loss) on investments 0.15 0.20 0.78 (0.31) 0.16 ----------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 0.48 $ 0.56 $ 1.15 $ 0.11 $ 0.51 ----------------------------------------------------------------------------------------------------------------------------- Distributions to shareowners: Net investment income (0.35) (0.35) (0.35) (0.48) (0.36) Net realized gain (0.05) -- -- (0.11) -- ----------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 0.08 $ 0.21 $ 0.80 $ (0.48) $ 0.15 ----------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.63 $ 9.55 $ 9.34 $ 8.54 $ 9.02 ============================================================================================================================= Total return* 5.12% 6.06% 13.63% 1.62% 5.80% Ratio of net expenses to average net assets+ 1.73% 1.73% 1.79% 1.83% 1.82% Ratio of net investment income to average net assets+ 3.47% 3.75% 3.91% 4.93% 3.79% Portfolio turnover rate 21% 36% 41% 34% 73% Net assets, end of period (in thousands) $93,737 $82,915 $81,892 $53,045 $35,784 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses 1.73% 1.73% 1.79% 1.83% 1.82% Net investment income 3.47% 3.75% 3.91% 4.93% 3.79% Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 1.73% 1.73% 1.79% 1.83% 1.82% Net investment income 3.47% 3.75% 3.91% 4.93% 3.79% ----------------------------------------------------------------------------------------------------------------------------- * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period, and no sales charges. Total return would be reduced if sales charges were taken into account. + Ratio with no reduction for fees paid indirectly. The accompanying notes are an integral part of these financial statements. 64 Pioneer Bond Fund | Annual Report | 6/30/12 ----------------------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 6/30/12 6/30/11 6/30/10 6/30/09 6/30/08 ----------------------------------------------------------------------------------------------------------------------------- Class R Net asset value, beginning of period $ 9.74 $ 9.52 $ 8.71 $ 9.18 $ 9.05 ----------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income $ 0.39 $ 0.41 $ 0.42 $ 0.48 $ 0.40 Net realized and unrealized gain (loss) on investments 0.14 0.22 0.80 (0.31) 0.15 ----------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 0.53 $ 0.63 $ 1.22 $ 0.17 $ 0.55 ----------------------------------------------------------------------------------------------------------------------------- Distributions to shareowners: Net investment income (0.40) (0.41) (0.41) (0.53) (0.42) Net realized gain (0.05) -- -- (0.11) -- ----------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 0.08 $ 0.22 $ 0.81 $ (0.47) $ 0.13 ----------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.82 $ 9.74 $ 9.52 $ 8.71 $ 9.18 ============================================================================================================================= Total return* 5.58% 6.67% 14.18% 2.35% 6.15% Ratio of net expenses to average net assets+ 1.25% 1.24% 1.25% 1.25% 1.25% Ratio of net investment income to average net assets+ 3.94% 4.25% 4.50% 5.53% 4.35% Portfolio turnover rate 21% 36% 41% 34% 73% Net assets, end of period (in thousands) $23,892 $20,508 $18,186 $15,404 $11,263 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses 1.35% 1.24% 1.26% 1.30% 1.31% Net investment income 3.84% 4.25% 4.49% 5.48% 4.30% Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 1.25% 1.24% 1.25% 1.25% 1.25% Net investment income 3.94% 4.25% 4.50% 5.53% 4.35% ----------------------------------------------------------------------------------------------------------------------------- * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, and the complete redemption of the investment at net asset value at the end of each period. + Ratio with no reduction for fees paid indirectly. The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/12 65 Financial Highlights (continued) ----------------------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 6/30/12 6/30/11 6/30/10 6/30/09 6/30/08 ----------------------------------------------------------------------------------------------------------------------------- Class Y Net asset value, beginning of period $ 9.57 $ 9.36 $ 8.55 $ 9.02 $ 8.88 ----------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income $ 0.44 $ 0.47 $ 0.47 $ 0.53 $ 0.45 Net realized and unrealized gain (loss) on investments 0.14 0.20 0.79 (0.31) 0.16 ----------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 0.58 $ 0.67 $ 1.26 $ 0.22 $ 0.61 ----------------------------------------------------------------------------------------------------------------------------- Distributions to shareowners: Net investment income (0.45) (0.46) (0.45) (0.58) (0.47) Net realized gain (0.05) -- -- (0.11) -- ----------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 0.08 $ 0.21 $ 0.81 $ (0.47) $ 0.14 ----------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.65 $ 9.57 $ 9.36 $ 8.55 $ 9.02 ============================================================================================================================= Total return* 6.27% 7.25% 15.06% 2.95% 6.91% Ratio of net expenses to average net assets+ 0.65% 0.61% 0.61% 0.63% 0.59% Ratio of net investment income to average net assets+ 4.55% 4.88% 5.13% 6.10% 5.02% Portfolio turnover rate 21% 36% 41% 34% 73% Net assets, end of period (in thousands) $847,072 $717,433 $713,869 $589,661 $710,219 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses 0.65% 0.61% 0.61% 0.64% 0.61% Net investment income 4.55% 4.88% 5.13% 6.09% 5.00% Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 0.65% 0.61% 0.61% 0.63% 0.59% Net investment income 4.55% 4.88% 5.13% 6.10% 5.02% ----------------------------------------------------------------------------------------------------------------------------- * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, and the complete redemption of the investment at net asset value at the end of each period. + Ratio with no reduction for fees paid indirectly. The accompanying notes are an integral part of these financial statements. 66 Pioneer Bond Fund | Annual Report | 6/30/12 -------------------------------------------------------------------------------------------------------------------------- Year Year Year Year 7/6/07 (a) Ended Ended Ended Ended to 6/30/12 6/30/11 6/30/10 6/30/09 6/30/08 -------------------------------------------------------------------------------------------------------------------------- Class Z Net asset value, beginning of period $ 9.68 $ 9.46 $ 8.67 $ 9.10 $ 8.89 -------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income $ 0.45 $ 0.47 $ 0.48 $ 0.54 $ 0.45 Net realized and unrealized gain (loss) on investments 0.14 0.21 0.77 (0.28) 0.22 -------------------------------------------------------------------------------------------------------------------------- Net increase from investment operations $ 0.59 $ 0.68 $ 1.25 $ 0.26 $ 0.67 -------------------------------------------------------------------------------------------------------------------------- Distributions to shareowners: Net investment income (0.46) (0.46) (0.46) (0.58) (0.46) Net realized gain (0.05) -- -- (0.11) -- -------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 0.08 $ 0.22 $ 0.79 $ (0.43) $ 0.21 -------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.76 $ 9.68 $ 9.46 $ 8.67 $ 9.10 ========================================================================================================================== Total return* 6.23% 7.30% 14.68% 3.42% 7.63%(b) Ratio of net expenses to average net assets+ 0.65% 0.65% 0.63% 0.65% 0.58%** Ratio of net investment income to average net assets+ 4.50% 4.82% 5.00% 5.91% 5.00%** Portfolio turnover rate 21% 36% 41% 34% 73% Net assets, end of period (in thousands) $2,196 $ 787 $ 720 $ 382 $ 102 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Total expenses 0.83% 0.72% 0.63% 0.67% 0.58%** Net investment income 4.32% 4.75% 5.00% 5.89% 5.00%** Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 0.65% 0.65% 0.63% 0.65% 0.58%** Net investment income 4.50% 4.82% 5.00% 5.91% 5.00%** -------------------------------------------------------------------------------------------------------------------------- (a) Class Z shares were first publicly offered on July 6, 2007. (b) Not annualized. * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, and the complete redemption of the investment at net asset value at the end of each period. ** Annualized. + Ratios with no fees paid indirectly. The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/12 67 Notes to Financial Statements | 6/30/12 1. Organization and Significant Accounting Policies Pioneer Bond Fund (the Fund) is a Delaware statutory trust registered under the Investment Company Act of 1940 as a diversified, open-end management investment company. The investment objective of the Fund is to seek current income consistent with preservation of capital. The Fund offers six classes of shares designated as Class A, Class B, Class C, Class R, Class Y and Class Z shares. Class Z shares were first publicly offered on July 6, 2007. Effective as of the close of business on December 31, 2009, Class B shares are no longer offered to new or existing shareholders, except that dividends and/or capital gain distributions may continue to be reinvested in Class B shares, and shareholders may exchange their Class B shares for Class B shares of other Pioneer funds, as permitted by existing exchange privileges. Each class of shares represents an interest in the same portfolio of investments of the Fund and has identical rights (based on relative net asset values) to assets and liquidation proceeds. Share classes can bear different rates of class-specific fees and expenses such as transfer agent and distribution fees. Differences in class-specific fees and expenses will result in differences in net investment income and, therefore, the payment of different dividends from net investment income earned by each class. The Amended and Restated Declaration of Trust of the Fund gives the Board the flexibility to specify either per-share voting or dollar-weighted voting when submitting matters for shareholder approval. Under per-share voting, each share of a class of the Fund is entitled to one vote. Under dollar-weighted voting, a shareholder's voting power is determined not by the number of shares owned, but by the dollar value of the shares on the record date. Each share class has exclusive voting rights with respect to matters affecting only that class, including with respect to the distribution plan for that class. There is no distribution plan for Class Y or Class Z shares. Class B shares convert to Class A shares approximately eight years after the date of purchase. The Fund's financial statements have been prepared in conformity with U.S. generally accepted accounting principles that require the management of the Fund to, among other things, make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of income, expenses and gains and losses on investments during the reporting period. Actual results could differ from those estimates. 68 Pioneer Bond Fund | Annual Report | 6/30/12 The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements, which are consistent with those policies generally accepted in the investment company industry: A. Security Valuation Security transactions are recorded as of trade date. The net asset value of the Fund is computed once daily, on each day the New York Stock Exchange (NYSE) is open, as of the close of regular trading on the NYSE. Senior floating rate loan interests (senior loans) are valued in accordance with guidelines established by the Board of Trustees at the mean between the last available bid and asked prices from one or more brokers or dealers as obtained from Loan Pricing Corporation. Senior loans for which no reliable price quotes are available will be valued by Loan Pricing Corporation through the use of pricing matrices to determine valuations. Fixed income securities with remaining maturity of more than sixty days are valued at prices supplied by independent pricing services, which consider such factors as market prices, market events, quotations from one or more brokers, Treasury spreads, yields, maturities and ratings. Valuations may be supplemented by dealers and other sources, as required. Equity securities that have traded on an exchange are valued at the last sale price on the principal exchange where they are traded. Equity securities that have not traded on the date of valuation, or securities for which sale prices are not available, generally are valued using the mean between the last bid and asked prices. Short-term fixed income securities with remaining maturities of sixty days or less generally are valued at amortized cost. Money market mutual funds are valued at net asset value. Securities or senior loans for which independent pricing services are unable to supply prices or for which market prices and/or quotations are not readily available or are considered to be unreliable are valued using fair value methods pursuant to procedures adopted by the Board of Trustees. The Fund may use fair value methods if it is determined that a significant event has occurred after the close of the exchange or market on which the security trades and prior to the determination of the Fund's net asset value. Examples of a significant event might include political or economic news, corporate restructurings, natural disasters, terrorist activity or trading halts. Thus, the valuation of the Fund's securities may differ from exchange prices. At June 30, 2012, there were no securities valued using fair value methods (other than securities valued using prices supplied by independent pricing services). Inputs used when applying fair value methods to value a security may include credit ratings, the financial condition of the company, current market conditions and comparable securities. Pioneer Bond Fund | Annual Report | 6/30/12 69 Principal amounts of mortgage-backed securities, asset-backed securities and corporate bonds are adjusted for monthly paydowns. Premiums and discounts related to certain mortgage-backed securities are amortized or accreted in proportion to the monthly paydowns. All discounts/premiums on debt securities are accreted/amortized for financial reporting purposes over the life of the respective securities, and such accretion/amortization is included in interest income. Dividend income is recorded on the ex-dividend date, except that certain dividends from foreign securities where the ex-dividend date may have passed are recorded as soon as the Fund becomes aware of the ex-dividend data in the exercise of reasonable diligence. Interest income, including interest on income bearing cash accounts, is recorded on the accrual basis. Dividend and interest income are reported net of unrecoverable foreign taxes withheld at the applicable country rates. Gains and losses on sales of investments are calculated on the identified cost method for both financial reporting and federal income tax purposes. B. Federal Income Taxes It is the Fund's policy to comply with the requirements of the Internal Revenue Code applicable to regulated investment companies and to distribute all of its taxable income and net realized capital gains, if any, to its shareowners. Therefore, no federal income tax provision is required. Tax years for the prior three fiscal years remain subject to examination by federal and state tax authorities. The amounts and characterizations of distributions to shareowners for financial reporting purposes are determined in accordance with federal income tax rules. Therefore, the sources of the Fund's distributions may be shown in the accompanying financial statements as from or in excess of net investment income or as from net realized gain on investment transactions, or as from paid-in capital, depending on the type of book/tax differences that may exist. At June 30, 2012, the Fund reclassified $158 to decrease paid-in capital, $66,468 to decrease distributions in excess of net investment income and $66,310 to increase accumulated net realized loss on investments to reflect permanent book/tax differences. The reclassification has no impact on the net asset value of the Fund and is designed to present the Fund's capital accounts on a tax basis. At June 30, 2012, the Fund had a net capital loss carryforward of $19,070,867, of which the following amounts will expire between 2014 and 2016 if not utilized: $4,128,229 in 2014, $7,351,686 in 2015 and $7,590,952 in 2016. The entire amount of which resulted from the reorganization with Regions Morgan Keegan Select Fixed Income Fund on May 15, 2009 and may be subject to limitations imposed by the Internal Revenue Code. 70 Pioneer Bond Fund | Annual Report | 6/30/12 The tax character of distributions paid during the years ended June 30, 2012 and June 30, 2011 was as follows: --------------------------------------------------------------------------------------- 2012 2011 --------------------------------------------------------------------------------------- Distributions paid from: Ordinary income $ 61,062,120 $ 57,808,812 Long-term capital gain 6,835,526 -- --------------------------------------------------------------------------------------- Total $ 67,897,646 $ 57,808,812 ======================================================================================= The following shows the components of distributable earnings on a federal income tax basis at June 30, 2012: -------------------------------------------------------------------------------- 2012 -------------------------------------------------------------------------------- Distributable earnings: Undistributed ordinary income $ 566,745 Capital loss carryforward (19,070,867) Dividends payable (1,880,333) Net unrealized gain 71,877,512 -------------------------------------------------------------------------------- Total $ 51,493,057 ================================================================================ The difference between book-basis and tax-basis net unrealized gain is attributable to the tax deferral of losses on wash sales, adjustments relating to catastrophe bonds, interest on defaulted bonds, the tax treatment of premium and amortization, the mark-to-market of futures contracts and credit default swaps. C. Fund Shares The Fund records sales and repurchases of its shares as of trade date. Pioneer Funds Distributor, Inc. (PFD), the principal underwriter for the Fund and a wholly owned indirect subsidiary of UniCredit S.p.A. (UniCredit), earned $119,441 in underwriting commissions on the sale of Class A shares during the year ended June 30, 2012. D. Class Allocations Income, common expenses, and realized and unrealized gains and losses are calculated at the Fund level and allocated daily to each class of shares based on its respective percentage of adjusted net assets at the beginning of the day. During the period, the Fund recognized gains of $17,845 settlement of class action lawsuits from several different companies, as reflected on the Statement of Operations. Distribution fees are calculated based on the average daily net asset value attributable to Class A, Class B, Class C, and Class R shares of the Fund, respectively (see Note 4). Class Y and Class Z shares do not pay distribution fees. All expenses and fees paid to the transfer agent, Pioneer Investment Management Shareholder Services, Inc. (PIMSS), for its services are allocated among the classes of shares based on the number of accounts in each class and the ratable allocation of related out-of-pocket expenses (see Note 3). Pioneer Bond Fund | Annual Report | 6/30/12 71 The Fund declares as daily dividends substantially all of its net investment income. All dividends are paid on a monthly basis. Short-term capital gain distributions, if any, may be declared with the daily dividends. Distributions to shareowners are recorded as of the ex-dividend date. Distributions paid by the Fund with respect to each class of shares are calculated in the same manner and at the same time, except that net investment income dividends to Class A, Class B, Class C, Class R, Class Y and Class Z shares can reflect different transfer agent and distribution expense rates. E. Risks At times, the Fund's investments may represent industries or industry sectors that are interrelated or have common risks, making the Fund more susceptible to any economic, political, or regulatory developments or other risks affecting those industries and sectors. The Fund's prospectus contains unau-dited information regarding the Fund's principal risks. Please refer to that document when considering the Fund's principal risks. F. Futures Contracts The Fund may enter into futures transactions to hedge against changes in interest rates, securities prices and currency exchange rates or to seek to increase total return. Futures contracts are types of derivatives. All futures contracts entered into by the Fund are traded on a futures exchange. Upon entering into a futures contract, the Fund is required to deposit with a broker an amount of cash or securities equal to the minimum "initial margin" requirements of the associated futures exchange. Subsequent payments for futures contracts ("variation margin") are paid or received by the Fund, depending on the daily fluctuation in the value of the contracts, and are recorded by the Fund as unrealized gains or losses. When the contract is closed, the Fund realizes a gain or loss equal to the difference between the opening and closing value of the contract as well as any fluctuation in foreign currency exchange rates where applicable. Futures contracts are subject to market risk, interest rate risk and currency exchange rate risk. Changes in value of the contracts may not directly correlate to the changes in value of the underlying securities. These risks may decrease the effectiveness of the Fund's hedging strategies and potentially result in a loss. With futures, there is minimal counterparty credit risk to the Fund since futures are exchange-traded and the exchange's clearinghouse, as counterparty to all exchange-traded futures, guarantees the futures against default. The average number of contracts open during the year ended June 30, 2012 was 1,128. 72 Pioneer Bond Fund | Annual Report | 6/30/12 At June 30, 2012, open futures contracts were as follows: --------------------------------------------------------------------------------------------- Number of Contracts Settlement Unrealized Type Long/(Short) Month Value Gain/(Loss) --------------------------------------------------------------------------------------------- U.S. 5 Year Note (CBT) (423) 9/12 $ (52,438,781) $ 72,705 U.S. Long Bond (CBT) (46) 9/12 (6,806,563) 51,750 U.S. 10 Year Note (CBT) (359) 9/12 (47,881,625) 101,047 U.S. 2 Year Note (CBT) (248) 9/12 (54,606,500) 50,376 U.S. Ultra Bond (CBT) 19 9/12 3,170,031 55,812 --------------------------------------------------------------------------------------------- $ (158,563,438) $ 331,690 ============================================================================================= G. Repurchase Agreements With respect to repurchase agreements entered into by the Fund, the value of the underlying securities (collateral), including accrued interest, is required to be equal to or in excess of the repurchase price. The collateral for all repurchase agreements is held in safekeeping in the customer-only account of the Fund's custodian or a subcustodian of the Fund. The Fund's investment adviser, Pioneer Investment Management, Inc. (PIM), is responsible for determining that the value of the collateral remains at least equal to the repurchase price. H. Securities Lending The Fund may lend securities in its portfolio to certain broker-dealers or other institutional investors. When entering into a securities loan transaction, the Fund typically receives cash collateral from the borrower equal to at least the value of the securities loaned, which is invested in temporary investments. Credit Suisse AG, New York Branch, as the Fund's securities lending agent, manages the Fund's securities lending collateral. The income earned on the investment of collateral is shared with the borrower and the lending agent in payment of any rebate due to the borrower with respect to the securities loan, and in compensation for the lending agent's services to the Fund. The Fund also continues to receive payments in lieu of dividends or interest on the securities loaned. Gain or loss on the value of the loaned securities that may occur during the term of the loan will be for the account of the Fund. The amount of the collateral is required to be adjusted daily to reflect any price fluctuation in the value of the loaned securities. If the required market value of the collateral is less than the value of the loaned securities, the borrower is required to deliver additional collateral for the account of the Fund prior to the close of business on that day. The Fund has the right, under the lending agreement, to terminate the loan and recover the securities from the borrower with prior notice. The Fund is required to return the cash collateral to the borrower and could suffer a loss if the value of the collateral, as invested, has declined. At June 30, 2012, the Fund had no securities on loan. Pioneer Bond Fund | Annual Report | 6/30/12 73 I. Credit Default Swap Agreements A credit default swap is a contract between a buyer of protection and a seller of protection against a pre-defined credit event. The Fund may buy or sell credit default swap contracts to increase the Fund's income, to add leverage to the portfolio or to hedge the risk of default on portfolio securities. As a seller of protection, the Fund would be required to pay the notional (or other agreed-upon) value of the referenced debt obligation to the counterparty in the event of a default by a U.S. or foreign corporate issuer of a debt obligation, which would likely result in a loss to the Fund. In return, the Fund would receive from the counterparty a periodic stream of payments during the term of the contract provided that no event of default occurred. The maximum exposure of loss to the seller would be the notional value of the credit default swaps outstanding. If no default occurs, the Fund would keep the stream of payments and would have no payment obligation. The Fund may also buy credit default swap contracts in order to hedge against the risk of default of debt securities, in which case the Fund would function as the counterparty referenced above. When the Fund enters into a credit default swap contract, one party, the protection buyer, makes an upfront or periodic payment to the protection seller in exchange for the right to receive a contingent payment. An upfront payment received by the Fund, as the protection seller, is recorded as a liability in the Fund's records. An upfront payment made by the Fund, as the protection buyer, is recorded as an asset in the Fund's records. Periodic payments received or paid by the Fund are recorded as realized gains or losses. The credit default swap contracts are marked-to-market daily using valuations supplied by independent sources and the change in value, if any, is recorded as unrealized gain or loss. Payments received or made as a result of a credit event or upon termination of the contract are recognized, net of the appropriate amount of the upfront payment, as realized gains or losses. Credit default swap contracts involving the sale of protection may involve greater risks than if the Fund had invested in the referenced debt instrument directly. Credit default swap contracts are subject to general market risk, liquidity risk, counterparty risk and credit risk. If the Fund is a protection buyer and no credit event occurs, it will lose its investment. If the Fund is a protection seller and a credit event occurs, the value of the referenced debt instrument received by the Fund, together with the periodic payments received, may be less than the amount the Fund pays to the protection buyer, resulting in a loss to the Fund. 74 Pioneer Bond Fund | Annual Report | 6/30/12 During the year ended June 30, 2012, the Fund entered into one credit default swap contract, with a notional amount of $14,000,000, which was still open at year end. Credit default swap contracts outstanding at year end are listed at the end of the Fund's schedule of investments. 2. Management Agreement PIM, a wholly owned indirect subsidiary of UniCredit, manages the Fund's portfolio. Management fees are calculated daily at the annual rate of 0.50% of the Fund's average daily net assets up to $1 billion; 0.45% of the next $1 billion; and 0.40% of the excess over $2 billion. For the year ended June 30, 2012, the effective management fee (excluding waivers and/or assumption of expenses) was equal to 0.49% of the Fund's average daily net assets. PIM has contractually agreed to limit ordinary operating expenses to the extent required to reduce Fund expenses to 0.85%, 1.90%, 1.90%, 1.25%, 0.76% and 0.65% of the average daily net assets attributable to Class A, Class B, Class C, Class R, Class Y and Class Z shares, respectively. Fees waived and expenses reimbursed during the year ended June 30, 2012 are reflected on the Statement of Operations. These expense limitations are in effect through November 1, 2013 for Class A, Class B, Class C, Class R and Class Z shares and through June 1, 2012 for Class Y shares. There can be no assurance that PIM will extend the expense limitation agreement for a class of shares beyond the dates referred to above. In addition, under the management and administration agreements, certain other services and costs, including accounting, regulatory reporting, and insurance premiums, are paid by the Fund as administrative reimbursements. Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $82,231 in management fees, administrative costs and certain other reimbursements payable to PIM at June 30, 2012. Effective March 5, 2012 PIM has retained Brown Brothers Harriman & Co. to provide certain sub-administration and accounting services to the Fund. 3. Transfer Agent PIMSS, a wholly owned indirect subsidiary of UniCredit, provides substantially all transfer agent and shareowner services to the Fund at negotiated rates. In addition, the Fund reimburses PIMSS for out-of-pocket expenses incurred by PIMSS related to shareholder communications activities such as proxy and statement mailings, outgoing phone calls and omnibus relationship contracts. For the year ended June 30, 2012, such out-of-pocket expenses by class of shares were as follows: Pioneer Bond Fund | Annual Report | 6/30/12 75 -------------------------------------------------------------------------------- Shareholder Communications: -------------------------------------------------------------------------------- Class A $ 609,032 Class B 16,707 Class C 95,733 Class R 50,588 Class Y 550,674 Class Z 3,125 -------------------------------------------------------------------------------- Total: $ 1,325,859 ================================================================================ Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $211,651 in transfer agent fees and out-of-pocket reimbursements payable to PIMSS at June 30, 2012. 4. Distribution and Service Plans The Fund has adopted a Distribution Plan pursuant to Rule 12b-1 of the Investment Company Act of 1940 with respect to its Class A, Class B, Class C and Class R shares. Pursuant to the Plan, the Fund pays PFD 0.25% of the average daily net assets attributable to Class A shares as compensation for personal services and/or account maintenance services or distribution services with regard to Class A shares. Pursuant to the Plan, the Fund also pays PFD 1.00% of the average daily net assets attributable to Class B and Class C shares. The fee for Class B and Class C shares consists of a 0.25% service fee and a 0.75% distribution fee paid as compensation for personal services and/or account maintenance services or distribution services with regard to Class B and Class C shares. Pursuant to the Plan, the Fund further pays PFD 0.50% of the average daily net assets attributable to Class R shares for distribution services. Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $18,992 in distribution fees payable to PFD at June 30, 2012. The Fund also has adopted a separate service plan for Class R shares (Service Plan). The Service Plan authorizes the Fund to pay securities dealers, plan administrators or other service organizations that agree to provide certain services to retirement plans or plan participants holding shares of the Fund a service fee of up to 0.25% of the Fund's average daily net assets attributable to Class R shares held by such plans. In addition, redemptions of each class of shares (except Class R, Class Y and Class Z shares) may be subject to a contingent deferred sales charge (CDSC). A CDSC of 1.00% may be imposed on redemptions of certain net asset value purchases of Class A shares within 12 months of purchase. Class B shares that are redeemed within five years of purchase are subject to a CDSC at declining rates beginning at 4.00%, based on the lower of cost or market value of shares being redeemed. Redemptions of Class C shares within one year of purchase are subject to a CDSC of 1.00%, based on the lower of cost or market value of shares being redeemed. Shares purchased as part of an exchange remain 76 Pioneer Bond Fund | Annual Report | 6/30/12 subject to any CDSC that applied to the original purchase of those shares. There is no CDSC for Class R, Class Y or Class Z shares. Proceeds from the CDSCs are paid to PFD. For the year ended June 30, 2012, CDSCs in the amount of $23,329 were paid to PFD. 5. Expense Offset Arrangements The Fund has entered into certain expense offset arrangements with PIMSS which may result in a reduction in the Fund's total expenses due to interest earned on cash held by PIMSS. For the year ended June 30, 2012, the Fund's expenses were not reduced under such arrangements. 6. Additional Disclosures about Derivative Instruments and Hedging Activities: Values of derivative instruments as of June 30, 2012 were as follows: --------------------------------------------------------------------------------------------- Derivatives Not Accounted for as Hedging Instruments Asset Derivatives 2012 Liabilities Derivatives 2012 Under Accounting -------------------------------------------------------------- Standards Codification Balance Sheet Balance Sheet (ASC) 815 Location Value Location Value --------------------------------------------------------------------------------------------- Interest Rate Futures* Receivables $ 810,325 Payables $ -- Credit Default Swaps Receivables $ -- Payables $ 76,622 --------------------------------------------------------------------------------------------- Total ============================================================================================= * Reflects the unrealized depreciation on futures contracts (see Note 1F). The current day's variation margin is separately disclosed on the Statement of Assets and Liabilities. The effect of derivative instruments on the Statement of Operations for the year ended June 30, 2012 was as follows: ------------------------------------------------------------------------------------------------- Derivatives Not Realized Change in Accounted for as Gain or Unrealized Hedging Instruments Loss on Gain or (Loss) Under Accounting Location of Gain or (Loss) Derivatives on Derivatives Standards Codification on Derivatives Recognized Recognized Recognized (ASC) 185 in Income in Income in Income ------------------------------------------------------------------------------------------------- Interest Rate Futures Net realized loss on futures $(2,084,350) contracts Interest Rate Futures Change in unrealized gain on futures contracts 309,609 Credit Default Swaps Net realized gain on credit default swaps 16,333 Credit Default Swaps Change in unrealized loss on credit default swaps (76,622) ------------------------------------------------------------------------------------------------- Pioneer Bond Fund | Annual Report | 6/30/12 77 Report of Independent Registered Public Accounting Firm To the Board of Trustees and the Shareowners of Pioneer Bond Fund: -------------------------------------------------------------------------------- We have audited the accompanying statement of assets and liabilities of Pioneer Bond Fund (the "Fund"), including the schedule of investments, as of June 30, 2012, and the related statement of operations 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 Fund's 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 Fund's 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 Fund's 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 June 30, 2012, by correspondence with the custodian, brokers and agent banks 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 position of Pioneer Bond Fund at June 30, 2012, the results of its operations for the year then ended, the changes in its 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. /s/ Ernst & Young LLP Boston, Massachusetts August 24, 2012 78 Pioneer Bond Fund | Annual Report | 6/30/12 Trustees, Officers and Service Providers Investment Adviser Pioneer Investment Management, Inc. Custodian and Sub-Administrator Brown Brothers Harriman & Co. Independent Registered Public Accounting Firm Ernst & Young LLP Principal Underwriter Pioneer Funds Distributor, Inc. Legal Counsel Bingham McCutchen LLP Shareowner Services and Transfer Agent Pioneer Investment Management Shareholder Services, Inc. Proxy voting policies and procedures of the Fund are available without charge, upon request, by calling our toll free number (1-800-225-6292). Information regarding how the Fund voted proxies relating to portfolio securities during the most recent 12-month period ended June 30 is publicly available to shareowners at us.pioneerinvestments.com. This information is also available on the Securities and Exchange Commission's web site at www.sec.gov. Trustees and Officers The Fund's Trustees and Officers are listed on the following pages, together with their principal occupations during at least the past five years. Trustees who are interested persons of the Fund within the meaning of the 1940 Act are referred to as Interested Trustees. Trustees who are not interested persons of the Fund are referred to as Independent Trustees. Each of the Trustees serves as a trustee of each of the 56 U.S. registered investment portfolios for which Pioneer serves as investment adviser (the "Pioneer Funds"). The address for all Trustees and all officers of the Fund is 60 State Street, Boston, Massachusetts 02109. The Statement of Additional Information of the Fund includes additional information about the Trustees and is available, without charge, upon request, by calling 1-800-225-6292. Pioneer Bond Fund | Annual Report | 6/30/12 79 Independent Trustees ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Position Term of Office and Other Directorships Held with the Fund Length of Service Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ Thomas J. Perna (61) Trustee since 2006. Chairman and Chief Executive Officer, Quadriserv, Director, Broadridge Financial Chairman of the Board Serves until a Inc. (technology products for securities lending Solutions, Inc. (investor and Trustee successor trustee industry) (2008 - present); private investor (2004 communications and securities is elected or - 2008); and Senior Executive Vice President, The processing provider for earlier retirement Bank of New York (financial and securities financial services industry) or removal. services) (1986 - 2004) (2009 - present); Director, Quadriserv, Inc. (2005 - present); and Commissioner, New Jersey State Civil Service Commission (2011 - present) ------------------------------------------------------------------------------------------------------------------------------------ David R. Bock (68) Trustee since 2005. Managing Partner, Federal City Capital Advisors Director of Enterprise Trustee Serves until a (corporate advisory services company) (1997 - 2004 Community Investment, Inc. successor trustee and 2008 - present); Interim Chief Executive (privately held affordable is elected or Officer, Oxford Analytica, Inc. (privately held housing finance company) (1985 earlier retirement research and consulting company) (2010); Executive - 2010); Director of Oxford or removal. Vice President and Chief Financial Officer, I-trax, Analytica, Inc. (2008 - Inc. (publicly traded health care services present); Director of The company) (2004 - 2007); and Executive Vice Swiss Helvetia Fund, Inc. President and Chief Financial Officer, Pedestal (closed-end fund) (2010 - Inc. (internet-based mortgage trading company) present); and Director of New (2000 - 2002) York Mortgage Trust (publicly traded mortgage REIT) (2004 - 2009, 2012 - present) ------------------------------------------------------------------------------------------------------------------------------------ 80 Pioneer Bond Fund | Annual Report | 6/30/12 ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Position Term of Office and Other Directorships held with the Fund Length of Service Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ Mary K. Bush (64) Trustee since 1997. Chairman, Bush International, LLC Director of Marriott Trustee Serves until a (international financial advisory firm) (1991 - International, Inc. (2008 - successor trustee present); Senior Managing Director, Brock present); Director of Discover is elected or Capital Group, LLC (strategic business Financial Services (credit card earlier retirement advisors) (2010 - present); Managing Director, issuer and electronic payment or removal. Federal Housing Finance Board (oversight of services) (2007 - present); Federal Home Loan Bank system) (1989 - 1991); Former Director of Briggs & Vice President and Head of International Stratton Co. (engine Finance, Federal National Mortgage Association manufacturer) (2004 - 2009); (1988 - 1989); U.S. Alternate Executive Former Director of UAL Director, International Monetary Fund (1984 - Corporation (airline holding 1988); Executive Assistant to Deputy Secretary company) (2006 - 2010); Director of the U.S. Treasury, U.S. Treasury Department of ManTech International (1982 - 1984); and Vice President and Team Corporation (national security, Leader in Corporate Banking, Bankers Trust Co. defense, and intelligence (1976 - 1982) technology firm) (2006 - present); Member, Board of Governors, Investment Company Institute (2007 - present); Member, Board of Governors, Independent Directors Council (2007 - present); Former Director of Brady Corporation (2000 - 2007); Former Director of Mortgage Guaranty Insurance Corporation (1991 - 2006); Former Director of Millennium Chemicals, Inc. (commodity chemicals) (2002 - 2005); Former Director, R.J. Reynolds Tobacco Holdings, Inc. (tobacco) (1999-2005); and Former Director of Texaco, Inc. (1997 - 2001) ------------------------------------------------------------------------------------------------------------------------------------ Pioneer Bond Fund | Annual Report | 6/30/12 81 Independent Trustees (continued) ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Position Term of Office and Other Directorships held with the Fund Length of Service Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ Benjamin M. Friedman Trustee since 2008. William Joseph Maier Professor of Political Trustee, Mellon Institutional (67) Serves until a Economy, Harvard University (1972 - present) Funds Investment Trust and Trustee successor trustee is Mellon Institutional Funds elected or earlier Master Portfolio (oversaw 17 retirement or portfolios in fund complex) removal. (1989-2008) ------------------------------------------------------------------------------------------------------------------------------------ Margaret B.W. Graham Trustee since 1996. Founding Director, Vice President and Corporate None (65) Serves until a Secretary, The Winthrop Group, Inc. (consulting Trustee successor trustee is firm) (1982-present); Desautels Faculty of elected or earlier Management, McGill University (1999 - present); and retirement or Manager of Research Operations and Organizational removal. Learning, Xerox PARC, Xerox's advance research center (1990-1994) ------------------------------------------------------------------------------------------------------------------------------------ Marguerite A. Piret (64) Trustee since 1996. President and Chief Executive Officer, Newbury, Director of New America High Trustee Serves until a Piret & Company, Inc. (investment banking firm) Income Fund, Inc. (closed-end successor trustee is (1981 - present) investment company) (2004 - elected or earlier present); and member, Board of retirement or Governors, Investment Company removal. Institute (2000 - 2006) ------------------------------------------------------------------------------------------------------------------------------------ Stephen K. West (83) Trustee since 2012. Senior Counsel, Sullivan & Cromwell LLP (law firm) Director, The Swiss Helvetia Trustee Serves until a (1998 - present); and Partner, Sullivan & Cromwell Fund, Inc. (closed-end successor trustee is LLP (prior to 1998) investment company); and elected or earlier Director, Invesco, Ltd. retirement or (formerly AMVESCAP, PLC) removal. (investment manager) (1997-2005) ------------------------------------------------------------------------------------------------------------------------------------ 82 Pioneer Bond Fund | Annual Report | 6/30/12 Interested Trustees ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Position Term of Office and Other Directorships held with the Fund Length of Service Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ John F. Cogan, Jr. (86)* Trustee since 1996. Non-Executive Chairman and a director of Pioneer None Trustee and President Serves until a Investment Management USA Inc. ("PIM-USA"); Chairman successor trustee is and a director of Pioneer; Chairman and Director of elected or earlier Pioneer Institutional Asset Management, Inc. (since retirement or 2006); Director of Pioneer Alternative Investment removal. Management Limited (Dublin) (until October 2011); President and a director of Pioneer Alternative Investment Management (Bermuda) Limited and affiliated funds; Deputy Chairman and a director of Pioneer Global Asset Management S.p.A. ("PGAM") (until April 2010); Director of PIOGLOBAL Real Estate Investment Fund (Russia) (until June 2006); Director of Nano-C, Inc. (since 2003); Director of Cole Management Inc. (2004 - 2011); Director of Fiduciary Counseling, Inc. (until December 2001); President and Director of Pioneer Funds Distributor, Inc. ("PFD") (until May 2006); President of all of the Pioneer Funds; and Retired Partner, Wilmer Cutler Pickering Hale and Dorr LLP ------------------------------------------------------------------------------------------------------------------------------------ Daniel K. Kingsbury (53)* Trustee since 2007. Director, CEO and President of PIM-USA (since February None Trustee and Executive Serves until a 2007); Director and President of Pioneer and Pioneer Vice President successor trustee is Institutional Asset Management, Inc. (since February elected or earlier 2007); Executive Vice President of all of the Pioneer retirement or Funds (since March 2007); Director of PGAM (2007 - removal. 2010); Head of New Europe Division, PGAM (2000 - 2005); and Head of New Markets Division, PGAM (2005 - 2007) ------------------------------------------------------------------------------------------------------------------------------------ * Mr. Cogan and Mr. Kingsbury are Interested Trustees because they are officers or directors of the Fund's investment adviser and certain of its affiliates. Pioneer Bond Fund | Annual Report | 6/30/12 83 Fund Officers ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Position Term of Office and Other Directorships held with the Fund Length of Service Principal Occupation Held by Officer ------------------------------------------------------------------------------------------------------------------------------------ Christopher J. Kelley (47) Since 2010. Serves at Vice President and Associate General Counsel of Pioneer None Secretary the discretion of the since January 2008 and Secretary of all of the Pioneer Board. Funds since June 2010; Assistant Secretary of all of the Pioneer Funds from September 2003 to May 2010; and Vice President and Senior Counsel of Pioneer from July 2002 to December 2007 ------------------------------------------------------------------------------------------------------------------------------------ Carol B. Hannigan (51) Since 2010. Serves at Fund Governance Director of Pioneer since December 2006 None Assistant Secretary the discretion of the and Assistant Secretary of all the Pioneer Funds since Board. June 2010; Manager - Fund Governance of Pioneer from December 2003 to November 2006; and Senior Paralegal of Pioneer from January 2000 to November 2003 ------------------------------------------------------------------------------------------------------------------------------------ Thomas Reyes (49) Since 2010. Serves at Counsel of Pioneer since June 2007 and Assistant None Assistant Secretary the discretion of the Secretary of all the Pioneer Funds since June 2010; and Board. Vice President and Counsel at State Street Bank from October 2004 to June 2007 ------------------------------------------------------------------------------------------------------------------------------------ Mark E. Bradley (52) Since 2008. Serves at Vice President - Fund Treasury of Pioneer; Treasurer of None Treasurer the discretion of the all of the Pioneer Funds since March 2008; Deputy Board. Treasurer of Pioneer from March 2004 to February 2008; and Assistant Treasurer of all of the Pioneer Funds from March 2004 to February 2008 ------------------------------------------------------------------------------------------------------------------------------------ Luis I. Presutti (47) Since 2000. Serves at Assistant Vice President - Fund Treasury of Pioneer; None Assistant Treasurer the discretion of the and Assistant Treasurer of all of the Pioneer Funds Board. ------------------------------------------------------------------------------------------------------------------------------------ Gary Sullivan (54) Since 2002. Serves at Fund Accounting Manager - Fund Treasury of Pioneer; and None Assistant Treasurer the discretion of the Assistant Treasurer of all of the Pioneer Funds Board. ------------------------------------------------------------------------------------------------------------------------------------ David F. Johnson (32) Since 2009. Serves at Fund Administration Manager - Fund Treasury of Pioneer None Assistant Treasurer the discretion of the since November 2008; Assistant Treasurer of all of the Board. Pioneer Funds since January 2009; and Client Service Manager - Institutional Investor Services at State Street Bank from March 2003 to March 2007 ------------------------------------------------------------------------------------------------------------------------------------ 84 Pioneer Bond Fund | Annual Report | 6/30/12 ------------------------------------------------------------------------------------------------------------------------------------ Name, Age and Position Term of Office and Other Directorships held with the Fund Length of Service Principal Occupation Held by Officer ------------------------------------------------------------------------------------------------------------------------------------ Jean M. Bradley (59) Since 2010. Serves at Chief Compliance Officer of Pioneer and of all the None Chief Compliance Officer the discretion of the Pioneer Funds since March 2010; Director of Adviser Board. and Portfolio Compliance at Pioneer since October 2005; and Senior Compliance Officer for Columbia Management Advisers, Inc. from October 2003 to October 2005 ------------------------------------------------------------------------------------------------------------------------------------ Pioneer Bond Fund | Annual Report | 6/30/12 85 This page for your notes. 86 Pioneer Bond Fund | Annual Report | 6/30/12 This page for your notes. Pioneer Bond Fund | Annual Report | 6/30/12 87 This page for your notes. 88 Pioneer Bond Fund | Annual Report | 6/30/12 This page for your notes. Pioneer Bond Fund | Annual Report | 6/30/12 89 This page for your notes. 90 Pioneer Bond Fund | Annual Report | 6/30/12 This page for your notes. Pioneer Bond Fund | Annual Report | 6/30/12 91 This page for your notes. 92 Pioneer Bond Fund | Annual Report | 6/30/12 How to Contact Pioneer We are pleased to offer a variety of convenient ways for you to contact us for assistance or information. Call us for: -------------------------------------------------------------------------------- Account Information, including existing accounts, new accounts, prospectuses, applications and service forms 1-800-225-6292 FactFone(SM) for automated fund yields, prices, account information and transactions 1-800-225-4321 Retirement plans information 1-800-622-0176 Write to us: -------------------------------------------------------------------------------- PIMSS, Inc. P.O. Box 55014 Boston, Massachusetts 02205-5014 Our toll-free fax 1-800-225-4240 Our internet e-mail address ask.pioneer@pioneerinvestments.com (for general questions about Pioneer only) Visit our web site: us.pioneerinvestments.com This report must be preceded or accompanied by a prospectus. The Fund files a complete schedule of investments with the Securities and Exchange Commission for the first and third quarters for each fiscal year on Form N-Q. Shareholders may view the filed Form N-Q by visiting the Commission's web site at http://www.sec.gov. The filed form may also be viewed and copied at the Commission's Public Reference Room in Washington, DC. Information regarding the operations of the Public Reference Room may be obtained by calling 1-800-SEC-0330. [LOGO] PIONEER Investments(R) Pioneer Investment Management, Inc. 60 State Street Boston, MA 02109 us.pioneerinvestments.com Securities offered through Pioneer Funds Distributor, Inc. 60 State Street, Boston, MA 02109 Underwriter of Pioneer Mutual Funds, Member SIPC (c) 2012 Pioneer Investments 19398-06-0812 ITEM 2. CODE OF ETHICS. (a) Disclose whether, as of the end of the period covered by the 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, regardless of whether these individuals are employed by the registrant or a third party. If the registrant has not adopted such a code of ethics, explain why it has not done so. The registrant has adopted, as of the end of the period covered by this report, a code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer and controller. (b) For purposes of this Item, the term "code of ethics" means written standards that are reasonably designed to deter wrongdoing and to promote: (1) Honest and ethical conduct, including the ethical handling of actual or apparent conflicts of interest between personal and professional relationships; (2) Full, fair, accurate, timely, and understandable disclosure in reports and documents that a registrant files with, or submits to, the Commission and in other public communications made by the registrant; (3) Compliance with applicable governmental laws, rules, and regulations; (4) The prompt internal reporting of violations of the code to an appropriate person or persons identified in the code; and (5) Accountability for adherence to the code. (c) The registrant must briefly describe the nature of any amendment, during the period covered by the report, to a provision of its 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, regardless of whether these individuals are employed by the registrant or a third party, and that relates to any element of the code of ethics definition enumerated in paragraph (b) of this Item. The registrant must file a copy of any such amendment as an exhibit pursuant to Item 10(a), unless the registrant has elected to satisfy paragraph (f) of this Item by posting its code of ethics on its website pursuant to paragraph (f)(2) of this Item, or by undertaking to provide its code of ethics to any person without charge, upon request, pursuant to paragraph (f)(3) of this Item. The registrant has made no amendments to the code of ethics during the period covered by this report. (d) If the registrant has, during the period covered by the report, granted a waiver, including an implicit waiver, from a provision of the code of ethics to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party, that relates to one or more of the items set forth in paragraph (b) of this Item, the registrant must briefly describe the nature of the waiver, the name of the person to whom the waiver was granted, and the date of the waiver. Not applicable. (e) If the registrant intends to satisfy the disclosure requirement under paragraph (c) or (d) of this Item regarding an amendment to, or a waiver from, a provision of its 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 and that relates to any element of the code of ethics definition enumerated in paragraph (b) of this Item by posting such information on its Internet website, disclose the registrant's Internet address and such intention. Not applicable. (f) The registrant must: (1) File with the Commission, pursuant to Item 10(a), a copy of its 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, as an exhibit to its annual report on this Form N-CSR (see attachment); (2) Post the text of such code of ethics on its Internet website and disclose, in its most recent report on this Form N-CSR, its Internet address and the fact that it has posted such code of ethics on its Internet website; or (3) Undertake in its most recent report on this Form N-CSR to provide to any person without charge, upon request, a copy of such code of ethics and explain the manner in which such request may be made. 	See Item 10(2) ITEM 3. AUDIT COMMITTEE FINANCIAL EXPERT. (a) (1) Disclose that the registrant's board of trustees has determined that the registrant either: (i) Has at least one audit committee financial expert serving on its audit committee; or (ii) Does not have an audit committee financial expert serving on its audit committee. The registrant's Board of Trustees has determined that the registrant has at least one audit committee financial expert. (2) If the registrant provides the disclosure required by paragraph (a)(1)(i) of this Item, it must disclose the name of the audit committee financial expert and whether that person is "independent." In order to be considered "independent" for purposes of this Item, a member of an audit committee may not, other than in his or her capacity as a member of the audit committee, the board of trustees, or any other board committee: (i) Accept directly or indirectly any consulting, advisory, or other compensatory fee from the issuer; or (ii) Be an "interested person" of the investment company as defined in Section 2(a)(19) of the Act (15 U.S.C. 80a-2(a)(19)). Ms. Marguerite A. Piret, an independent trustee, is such an audit committee financial expert. (3) If the registrant provides the disclosure required by paragraph (a)(1) (ii) of this Item, it must explain why it does not have an audit committee financial expert. Not applicable. ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES. (a) Disclose, under the caption AUDIT FEES, the aggregate fees billed for each of the last two fiscal years for professional services rendered by the principal accountant for the audit of the registrant's annual financial statements or services that are normally provided by the accountant in connection with statutory and regulatory filings or engagements for those fiscal years. Audit Fees Fees for audit services provided to the Fund, including fees associated with the filings of its Form N-1A, totaled approximately $44,266 in 2012 and approximately $44,286 in 2011. (b) Disclose, under the caption AUDIT-RELATED FEES, the aggregate fees billed in each of the last two fiscal years for assurance and related services by the principal accountant that are reasonably related to the performance of the audit of the registrant's financial statements and are not reported under paragraph (a) of this Item. Registrants shall describe the nature of the services comprising the fees disclosed under this category. Audit-Related Fees There were no audit-related services in 2012 or 2011. (c) Disclose, under the caption TAX FEES, the aggregate fees billed in each of the last two fiscal years for professional services rendered by the principal accountant for tax compliance, tax advice, and tax planning. Registrants shall describe the nature of the services comprising the fees disclosed under this category. Tax Fees Fees for tax compliance services, primarily for tax returns, totaled $8,290 in 2012 and $8,290 in 2011. (d) Disclose, under the caption ALL OTHER FEES, the aggregate fees billed in each of the last two fiscal years for products and services provided by the principal accountant, other than the services reported in paragraphs (a) through (c) of this Item. Registrants shall describe the nature of the services comprising the fees disclosed under this category. Other Fees There were no other services provided to the Fund during the fiscal years ended June 30, 2012 and 2011. (e) (1) Disclose the audit committee's pre-approval policies and procedures described in paragraph (c)(7) of Rule 2-01 of Regulation S-X. PIONEER FUNDS APPROVAL OF AUDIT, AUDIT-RELATED, TAX AND OTHER SERVICES PROVIDED BY THE INDEPENDENT AUDITOR SECTION I - POLICY PURPOSE AND APPLICABILITY The Pioneer Funds recognize the importance of maintaining the independence of their outside auditors. Maintaining independence is a shared responsibility involving Pioneer Investment Management, Inc ("PIM"), the audit committee and the independent auditors. The Funds recognize that a Fund's independent auditors: 1) possess knowledge of the Funds, 2) are able to incorporate certain services into the scope of the audit, thereby avoiding redundant work, cost and disruption of Fund personnel and processes, and 3) have expertise that has value to the Funds. As a result, there are situations where it is desirable to use the Fund's independent auditors for services in addition to the annual audit and where the potential for conflicts of interests are minimal. Consequently, this policy, which is intended to comply with Rule 210.2-01(C)(7), sets forth guidelines and procedures to be followed by the Funds when retaining the independent audit firm to perform audit, audit-related tax and other services under those circumstances, while also maintaining independence. Approval of a service in accordance with this policy for a Fund shall also constitute approval for any other Fund whose pre-approval is required pursuant to Rule 210.2-01(c)(7)(ii). In addition to the procedures set forth in this policy, any non-audit services that may be provided consistently with Rule 210.2-01 may be approved by the Audit Committee itself and any pre-approval that may be waived in accordance with Rule 210.2-01(c)(7)(i)(C) is hereby waived. Selection of a Fund's independent auditors and their compensation shall be determined by the Audit Committee and shall not be subject to this policy. SECTION II - POLICY ---------------- -------------------------------- ------------------------------------------------- SERVICE SERVICE CATEGORY DESCRIPTION SPECIFIC PRE-APPROVED SERVICE SUBCATEGORIES CATEGORY ---------------- -------------------------------- ------------------------------------------------- I. AUDIT Services that are directly o Accounting research assistance SERVICES related to performing the o SEC consultation, registration independent audit of the Funds statements, and reporting o Tax accrual related matters o Implementation of new accounting standards o Compliance letters (e.g. rating agency letters) o Regulatory reviews and assistance regarding financial matters o Semi-annual reviews (if requested) o Comfort letters for closed end offerings ---------------- -------------------------------- ------------------------------------------------- II. Services which are not o AICPA attest and agreed-upon procedures AUDIT-RELATED prohibited under Rule o Technology control assessments SERVICES 210.2-01(C)(4) (the "Rule") o Financial reporting control assessments and are related extensions of o Enterprise security architecture the audit services support the assessment audit, or use the knowledge/expertise gained from the audit procedures as a foundation to complete the project. In most cases, if the Audit-Related Services are not performed by the Audit firm, the scope of the Audit Services would likely increase. The Services are typically well-defined and governed by accounting professional standards (AICPA, SEC, etc.) ---------------- -------------------------------- ------------------------------------------------- ------------------------------------- ------------------------------------ AUDIT COMMITTEE APPROVAL POLICY AUDIT COMMITTEE REPORTING POLICY ------------------------------------- ------------------------------------ o "One-time" pre-approval o A summary of all such for the audit period for all services and related fees pre-approved specific service reported at each regularly subcategories. Approval of the scheduled Audit Committee independent auditors as meeting. auditors for a Fund shall constitute pre approval for these services. ------------------------------------- ------------------------------------ o "One-time" pre-approval o A summary of all such for the fund fiscal year within services and related fees a specified dollar limit (including comparison to for all pre-approved specified dollar limits) specific service subcategories reported quarterly. o Specific approval is needed to exceed the pre-approved dollar limit for these services (see general Audit Committee approval policy below for details on obtaining specific approvals) o Specific approval is needed to use the Fund's auditors for Audit-Related Services not denoted as "pre-approved", or to add a specific service subcategory as "pre-approved" ------------------------------------- ------------------------------------ SECTION III - POLICY DETAIL, CONTINUED ----------------------- --------------------------- ----------------------------------------------- SERVICE CATEGORY SERVICE CATEGORY SPECIFIC PRE-APPROVED SERVICE SUBCATEGORIES DESCRIPTION ----------------------- --------------------------- ----------------------------------------------- III. TAX SERVICES Services which are not o Tax planning and support prohibited by the Rule, o Tax controversy assistance if an officer of the Fund o Tax compliance, tax returns, excise determines that using the tax returns and support Fund's auditor to provide o Tax opinions these services creates significant synergy in the form of efficiency, minimized disruption, or the ability to maintain a desired level of confidentiality. ----------------------- --------------------------- ----------------------------------------------- ------------------------------------- ------------------------- AUDIT COMMITTEE APPROVAL POLICY AUDIT COMMITTEE REPORTING POLICY ------------------------------------- ------------------------- ------------------------------------- ------------------------- o "One-time" pre-approval o A summary of for the fund fiscal year all such services and within a specified dollar limit related fees 				 (including comparison 			 to specified dollar 			 limits) reported 			 quarterly. o Specific approval is needed to exceed the pre-approved dollar limits for these services (see general Audit Committee approval policy below for details on obtaining specific approvals) o Specific approval is needed to use the Fund's auditors for tax services not denoted as pre-approved, or to add a specific service subcategory as "pre-approved" ------------------------------------- ------------------------- SECTION III - POLICY DETAIL, CONTINUED ----------------------- --------------------------- ----------------------------------------------- SERVICE CATEGORY SERVICE CATEGORY SPECIFIC PRE-APPROVED SERVICE SUBCATEGORIES DESCRIPTION ----------------------- --------------------------- ----------------------------------------------- IV. OTHER SERVICES Services which are not o Business Risk Management support prohibited by the Rule, o Other control and regulatory A. SYNERGISTIC, if an officer of the Fund compliance projects UNIQUE QUALIFICATIONS determines that using the Fund's auditor to provide these services creates significant synergy in the form of efficiency, minimized disruption, the ability to maintain a desired level of confidentiality, or where the Fund's auditors posses unique or superior qualifications to provide these services, resulting in superior value and results for the Fund. ----------------------- --------------------------- ----------------------------------------------- --------------------------------------- ------------------------ AUDIT COMMITTEE APPROVAL POLICY AUDIT COMMITTEE REPORTING POLICY ------------------------------------- -------------------------- o "One-time" pre-approval o A summary of for the fund fiscal year within all such services and a specified dollar limit related fees 			 (including comparison 			 to specified dollar 				 limits) reported quarterly. o Specific approval is needed to exceed the pre-approved dollar limits for these services (see general Audit Committee approval policy below for details on obtaining specific approvals) o Specific approval is needed to use the Fund's auditors for "Synergistic" or "Unique Qualifications" Other Services not denoted as pre-approved to the left, or to add a specific service subcategory as "pre-approved" ------------------------------------- -------------------------- SECTION III - POLICY DETAIL, CONTINUED ----------------------- ------------------------- ----------------------------------------------- SERVICE CATEGORY SERVICE CATEGORY SPECIFIC PROHIBITED SERVICE SUBCATEGORIES DESCRIPTION ----------------------- ------------------------- ----------------------------------------------- PROHIBITED SERVICES Services which result 1. Bookkeeping or other services in the auditors losing related to the accounting records or independence status financial statements of the audit under the Rule. client* 2. Financial information systems design and implementation* 3. Appraisal or valuation services, fairness* opinions, or contribution-in-kind reports 4. Actuarial services (i.e., setting actuarial reserves versus actuarial audit work)* 5. Internal audit outsourcing services* 6. Management functions or human resources 7. Broker or dealer, investment advisor, or investment banking services 8. Legal services and expert services unrelated to the audit 9. Any other service that the Public Company Accounting Oversight Board determines, by regulation, is impermissible ----------------------- ------------------------- ----------------------------------------------- ------------------------------------------- ------------------------------ AUDIT COMMITTEE APPROVAL POLICY AUDIT COMMITTEE REPORTING POLICY ------------------------------------------- ------------------------------ o These services are not to be o A summary of all performed with the exception of the(*) services and related services that may be permitted fees reported at each if they would not be subject to audit regularly scheduled procedures at the audit client (as Audit Committee meeting defined in rule 2-01(f)(4)) level will serve as continual the firm providing the service. confirmation that has 				 not provided any restricted services. ------------------------------------------- ------------------------------ -------------------------------------------------------------------------------- GENERAL AUDIT COMMITTEE APPROVAL POLICY: o For all projects, the officers of the Funds and the Fund's auditors will each make an assessment to determine that any proposed projects will not impair independence. o Potential services will be classified into the four non-restricted service categories and the "Approval of Audit, Audit-Related, Tax and Other Services" Policy above will be applied. Any services outside the specific pre-approved service subcategories set forth above must be specifically approved by the Audit Committee. o At least quarterly, the Audit Committee shall review a report summarizing the services by service category, including fees, provided by the Audit firm as set forth in the above policy. -------------------------------------------------------------------------------- (2) Disclose the percentage of services described in each of paragraphs (b) through (d) of this Item that were approved by the audit committee pursuant to paragraph (c)(7)(i)(C) of Rule 2-01 of Regulation S-X. Non-Audit Services Beginning with non-audit service contracts entered into on or after May 6, 2003, the effective date of the new SEC pre- approval rules, the Fund's audit committee is required to pre- approve services to affiliates defined by SEC rules to the extent that the services are determined to have a direct impact on the operations or financial reporting of the Fund. For the years ended June 30, 2012 and 2011, there were no services provided to an affiliate that required the Fund's audit committee pre- approval. (f) If greater than 50 percent, disclose the percentage of hours expended on the principal accountant's engagement to audit the registrant's financial statements for the most recent fiscal year that were attributed to work performed by persons other than the principal accountant's full-time, permanent employees. N/A (g) Disclose the aggregate non-audit fees billed by the registrant's accountant for services rendered to the registrant, and rendered to the registrant's investment adviser (not including any sub-adviser whose role is primarily portfolio management and is subcontracted with or overseen by another investment adviser), and any entity controlling, controlled by, or under common control with the adviser that provides ongoing services to the registrant for each of the last two fiscal years of the registrant. The aggregate non-audit fees for the Fund and affiliates, as previously defined, totaled approximately $8,290 in 2012 and $8,290 in 2011. (h) Disclose whether the registrant's audit committee of the board of trustees has considered whether the provision of non-audit services that were rendered to the registrant's investment adviser (not including any subadviser whose role is primarily portfolio management and is subcontracted with or overseen by another investment adviser), and any entity controlling, controlled by, or under common control with the investment adviser that provides ongoing services to the registrant that were not pre-approved pursuant to paragraph (c)(7)(ii) of Rule 2-01 of Regulation S-X is compatible with maintaining the principal accountant's independence. The Fund's audit committee of the Board of Trustees has considered whether the provision of non-audit services that were rendered to the Affiliates (as defined) that were not pre- approved pursuant to paragraph (c)(7)(ii) of Rule 2-01 of Regulation S-X is compatible with maintaining the principal accountant's independence. Item 5. Audit Committee of Listed Registrants (a) If the registrant is a listed issuer as defined in Rule 10A-3 under the Exchange Act (17 CFR 240.10A-3), state whether or not the registrant has a separately-designated standing audit committee established in accordance with Section 3(a)(58)(A) of the Exchange Act (15 U.S.C. 78c(a)(58)(A)). If the registrant has such a committee, however designated, identify each committee member. If the entire board of directors is acting as the registrants audit committee as specified in Section 3(a)(58)(B) of the Exchange Act (15 U.S.C. 78c(a)(58)(B)), so state. N/A (b) If applicable, provide the disclosure required by Rule 10A-3(d) under the Exchange Act (17 CFR 240.10A-3(d)) regarding an exemption from the listing standards for audit committees. N/A Item 6. Schedule of Investments. File Schedule I Investments in securities of unaffiliated issuers as of the close of the reporting period as set forth in 210.12- 12 of Regulation S-X [17 CFR 210.12-12], unless the schedule is included as part of the report to shareholders filed under Item 1 of this Form. Included in Item 1 ITEM 7. DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR CLOSED-END MANAGEMENT INVESTMENT COMPANIES. A closed-end management investment company that is filing an annual report on this Form N-CSR must, unless it invests exclusively in non-voting securities, describe the policies and procedures that it uses to determine how to vote proxies relating to portfolio securities, including the procedures that the company uses when a vote presents a conflict between the interests of its shareholders, on the one hand, and those of the company's investment adviser; principal underwriter; or any affiliated person (as defined in Section 2(a)(3) of the Investment Company Act of 1940 (15 U.S.C. 80a-2(a)(3)) and the rules thereunder) of the company, its investment adviser, or its principal underwriter, on the other. Include any policies and procedures of the company's investment adviser, or any other third party, that the company uses, or that are used on the company's behalf, to determine how to vote proxies relating to portfolio securities. Not applicable to open-end management investment companies. Item 8. Portfolio Managers of Closed-End Management Investment Companies. (a) If the registrant is a closed-end management investment company that is filing an annual report on this Form N-CSR,provide the following information: (1) State the name, title, and length of service of the person or persons employed by or associated with the registrant or an investment adviser of the registrant who are primarily responsible for the day-to-day management of the registrants portfolio (Portfolio Manager). Also state each Portfolio Managers business experience during the past 5 years. Not applicable to open-end management investment companies. Item 9. Purchases of Equity Securities by Closed-End Management Investment Company and Affiliated Purchasers. (a) If the registrant is a closed-end management investment company, in the following tabular format, provide the information specified in paragraph (b) of this Item with respect to any purchase made by or on behalf of the registrant or any affiliated purchaser, as defined in Rule 10b-18(a)(3) under the Exchange Act (17 CFR 240.10b-18(a)(3)), of shares or other units of any class of the registrants equity securities that is registered by the registrant pursuant to Section 12 of the Exchange Act (15 U.S.C. 781). Instruction to paragraph (a). Disclose all purchases covered by this Item, including purchases that do not satisfy the conditions of the safe harbor of Rule 10b-18 under the Exchange Act (17 CFR 240.10b-18), made in the period covered by the report. Provide disclosures covering repurchases made on a monthly basis. For example, if the reporting period began on January 16 and ended on July 15, the chart would show repurchases for the months from January 16 through February 15, February 16 through March 15, March 16 through April 15, April 16 through May 15, May 16 through June 15, and June 16 through July 15. Not applicable to open-end management investment companies. Item 10. Submission of Matters to a Vote of Security Holders. Describe any material changes to the procedures by which shareholders may recommend nominees to the registrants board of directors, where those changes were implemented after the registrant last provided disclosure in response to the requirements of Item 7(d)(2)(ii)(G) of Schedule 14A (17 CFR 240.14a-101), or this Item. There have been no material changes to the procedures by which the shareholders may recommend nominees to the registrants board of directors since the registrant last provided disclosure in response to the requirements of Item 7(d)(2)(ii)(G) of Schedule 14(A) in its definitive proxy statement, or this Item. ITEM 11. CONTROLS AND PROCEDURES. (a) Disclose the conclusions of the registrant's principal executive officer or officers and principal financial officer or officers, or persons performing similar functions, about the effectiveness of the registrant's disclosure controls and procedures (as defined in Rule 30a-2(c) under the Act (17 CFR 270.30a-2(c))) based on their evaluation of these controls and procedures as of a date within 90 days of the filing date of the report that includes the disclosure required by this paragraph. The registrant's principal executive officer and principal financial officer have concluded that the registrant's disclosure controls and procedures are effective based on their evaluation of these controls and procedures as of a date within 90 days of the filing date of this report. (b) Disclose whether or not there were significant changes in the registrant's internal controls or in other factors that could significantly affect these controls subsequent to the date of their evaluation, including any corrective actions with regard to significant deficiencies and material weaknesses. There were no significant changes in the registrant's internal control over financial reporting that occurred during the second fiscal quarter of the period covered by this report that have materially affected, or are reasonably likely to materially affect, the registrant's internal control over financial reporting. The registrant's principal executive officer and principal financial officer, however, voluntarily are reporting the following information: In August of 2006 the registrant's investment adviser enhanced its internal procedures for reporting performance information required to be included in prospectuses. Those enhancements involved additional internal controls over the appropriateness of performance data generated for this purpose. Such enhancements were made following an internal review which identified prospectuses relating to certain classes of shares of a limited number of registrants where, inadvertently, performance information not reflecting the deduction of applicable sales charges was included. Those prospectuses were revised, and the revised prospectuses were distributed to shareholders. ITEM 12. EXHIBITS. File the exhibits listed below as part of this Form. Letter or number the exhibits in the sequence indicated. (a) 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. (b) A separate certification for each principal executive officer and principal financial officer of the registrant as required by Rule 30a-2 under the Act (17 CFR 270.30a-2). Filed herewith. SIGNATURES [See General Instruction F] 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) Pioneer Bond Fund By (Signature and Title)* /s/ John F. Cogan, Jr. John F. Cogan, Jr, President Date August 29, 2012 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/ John F. Cogan, Jr. John F. Cogan, Jr., President Date August 29, 2012 By (Signature and Title)* /s/ Mark Bradley Mark Bradley, Treasurer & Chief Accounting & Financial Officer Date August 29, 2012 * Print the name and title of each signing officer under his or her signature.