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, 2010 through June 30, 2011 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, 2011 -------------------------------------------------------------------------------- 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: 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 56 Notes to Financial Statements 66 Report of Independent Registered Public Accounting Firm 76 Trustees, Officers and Service Providers 78 Pioneer Bond Fund | Annual Report | 6/30/11 1 President's Letter Dear Shareowner, The U.S. economy went through a soft patch in the first half of 2011, and the second half of the year, so far, has been highlighted by the U.S. government's battle over the debt ceiling and Standard & Poor's downgrade of the U.S. Treasury's credit rating from the top rating of "AAA" for the first time in history. The markets reacted quite negatively to the credit downgrade, and there is concern about the strength of the global economy going forward. Pioneer is cautiously optimistic that the U.S. economy will see moderate economic growth over the balance of 2011, though at a slower pace than we had expected earlier this year. While housing and employment remain weak, the private sector shows signs of slow but steady improvement, led by higher capital investment, solid exports, improved consumption, and gradually rising demand for consumer auto loans and commercial loans. At the same time, the risks to growth remain substantial, including high unemployment, continued delays in the housing sector's recovery, and the fiscal drag of U.S. federal and state budget cuts. The difficult recovery process has been accompanied by wide market swings. While this is a challenging environment, our investment professionals continue to focus on finding good opportunities to invest in both equity and bond markets using the same disciplined approach Pioneer has used since 1928. Our approach 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. 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. 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 2 Pioneer Bond Fund | Annual Report | 6/30/11 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 the opinion of Fund management 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 | 6/30/11 3 Portfolio Management Discussion | 6/30/11 The fixed-income markets generated solid performance over the 12 months ended June 30, 2011, with credit-sensitive securities, especially corporate debt, performing particularly well as corporate profits improved in an expanding economy. Nevertheless, longer-maturity Treasuries produced negative returns amid growing concerns about potentially rising inflationary pressures, and the Federal Reserve Board's (the Fed's) focus on purchasing predominantly short- and intermediate-term Treasury securities. 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, 2011. Mr. Taubes, Chief Investment Officer for the U.S. and portfolio manager at Pioneer Investments, is responsible for the daily management of the Fund. Q How did the Fund perform over the 12 months ended June 30, 2011? A Pioneer Bond Fund Class A shares returned 7.08% at net asset value over the 12 months ended June 30, 2011, while the Fund's benchmark, the Barclays Capital Aggregate Bond Index (the Barclays Index), returned 3.90%. Over the same period, the average return of the 138 mutual funds in Lipper's Corporate Debt, A-Rated category was 5.09%. On June 30, 2011, the 30-day standardized SEC yield of the Fund's Class A shares was 3.98%. Q What were the principal factors that affected the Fund's performance over the 12 months ended June 30, 2011? A It was a good market for fixed-income investments, especially for high-yield and investment-grade corporate bonds, which gained in value as the economy continued to grow and profits improved. Other credit-sensitive debt, including non-government-agency mortgages and bank loans, also did well. Government securities lagged, however, when market interest rates began rising amid growing concerns about rising inflationary pressures. Both the 30-year and the 10-year Treasury underperformed as the yield curve, which reflects the differences in yields between longer-maturity and shorter- maturity securities, steepened significantly during the 12-month period, to the disadvantage of investments in longer-term high-grade debt. The Fund performed well during the 12-month period, outdistancing both the benchmark Barclays Index as well as the average return of its Lipper peers. The Fund's outperformance was principally the result of the higher yield produced by the Fund's investments, particularly from holdings in corporate debt, non-agency mortgage-backed securities and bank loans. The Fund placed heavy emphasis on the higher-yielding credit sectors throughout the 12 months ended June 30, 2011. In contrast, the Fund was substantially underweighted to Treasuries and government securities. 4 Pioneer Bond Fund | Annual Report | 6/30/11 Corporate bonds and other credit-sensitive investments delivered good returns over the 12 months ended June 30, 2011, as both the domestic and the global economies were growing and corporate profits were increasing, even though the domestic expansion appeared to slow over the last six months of the period. Contributing to the slowdown over the 12-month period were some specific factors affecting the economy that we believe were transitory. The factors included the effects of the March 2011 earthquake and tsunami in Japan, which have hindered industrial production in the United States as well as in Japan, particularly by automotive manufacturers, and the impacts of tornadoes and flooding in parts of the United States. Higher energy costs, which have started to recede somewhat, also have taken their toll. We think those influences should have only a temporary impact on economic growth, however, and that the pace of the economic expansion should improve. While the jobs market has shown disappointing growth, mainly because of cutbacks by state and local governments, private job creation actually improved, albeit slowly. Overall, we think the fundamentals of the economy are stronger and the growth outlook is more favorable than would be indicated by the sluggishness over the last half of the 12-month period. Q How was the Fund positioned during the 12 months ended June 30, 2011, and how did the positioning influence performance? A We continued to overweight the Fund to corporate bonds, both high-yield and investment-grade, over the 12 months ended June 30, 2011, and also maintained healthy exposures to non-agency mortgage-backed securities and bank loans. The concentration on the credit sectors helped the Fund's performance substantially, principally because of the yield generated by the investments. While yield was the biggest factor in the Fund's outperformance of the Barclays Index, sector allocations also helped, as overweight positions in investment-grade and non-benchmark high-yield debt boosted performance, as did the Fund's non-benchmark positions in bank loans and non-agency mortgage-backed securities. Overall credit selection was positive over the 12-month period. Individual securities that were notably strong performers for the Fund included the debt of Domino's Pizza; Forest City Enterprises, a commercial real estate company; and securities issued by several banking and insurance companies, including U.S. Bancorp and Liberty Mutual. Several commercial mortgage-backed securities also made noteworthy contributions to the Fund's performance. On the negative side, the Fund's investments in Local Insight Media, a yellow pages publisher, and Coso Geothermal, an energy producer, proved somewhat disappointing. The Fund was positioned fairly consistently throughout the 12 months ended June 30, 2011. At the end of the period, 38.8% of the Fund's assets Pioneer Bond Fund | Annual Report | 6/30/11 5 were invested in pass-through securities, predominately non-agency mortgage-backed debt. Investments in bank loans accounted for 7.6% of Fund assets. By quality, 44.7% of the Fund's assets were invested in investment-grade securities with credit ratings ranging from BBB to AAA; another 15.7% of assets were allocated to below-investment grade, high- yielding corporate bonds, while Treasury/agency securities (35.4%) and commercial paper (4.2%) rounded out the Fund's quality distribution at period end. The Fund's effective duration as of June 30, 2011, was 4.32 years (duration is a measure of a portfolio's price sensitivity to changes in interest rates). Q What is your investment outlook? A We think many market-watchers are a bit too negative and that there is good potential for improving growth trends. Much of the sluggishness of recent months, we think, can be attributed to temporary factors such as weather and the Japanese earthquake. We anticipate continuing to emphasize the credit sectors in the Fund, rather than government bonds. Treasuries, with their very low yields, appear richly priced, while we are much more positive about corporate bonds and other credit-sensitive securities. Corporations have been generating healthy earnings and their profit margins and cash balances continue to be solid. We think the credit profiles of non-agency mortgage-backed securities are getting better as well. Overall, we expect to maintain the Fund's present positioning, while remaining alert for any potential changes in economic or inflationary trends or the investment environment. Please refer to the Schedule of Investments on pages 18-55 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. 6 Pioneer Bond Fund | Annual Report | 6/30/11 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 the opinion of Fund management as of the date of this report. These opinions should not be relied upon for any other purposes. Pioneer Bond Fund | Annual Report | 6/30/11 7 Portfolio Summary | 6/30/11 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 32.8% U.S. Government Securities 19.2% Collateralized Mortgage Obligations 15.4% Temporary Cash Investments 10.6% Asset Backed Securities 7.6% Senior Secured Loans 7.1% Municipal Bonds 5.0% Preferred Stocks 1.6% Convertible Corporate Bonds 0.6% Foreign Government Bonds 0.1% Portfolio Quality -------------------------------------------------------------------------------- (As a percentage of total investment portfolio) [THE FOLLOWING DATA WAS REPRESENTED AS A PIE CHART IN THE PRINTED MATERIAL] AAA 3.5% AA 4.0% A 11.7% BBB 25.5% BB 9.4% B & Lower 6.3% Commercial Paper 4.2% Treasury/Agency 35.4% 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. Federal National Mortgage Association, 4.0%, 1/25/41 1.57% -------------------------------------------------------------------------------- 2. Federal National Mortgage Association, 4.5%, 7/1/41 1.18 -------------------------------------------------------------------------------- 3. Forest City Enterprises, Inc., 7.0%, 12/31/49 0.80 -------------------------------------------------------------------------------- 4. U.S. Treasury Notes, 4.5%, 8/15/39 0.73 -------------------------------------------------------------------------------- 5. U.S. Treasury Notes, 2.75%, 2/15/19 0.69 -------------------------------------------------------------------------------- 6. Goldman Sachs Capital, Floating Rate Note, 12/29/49 0.69 -------------------------------------------------------------------------------- 7. U.S. Treasury Notes, 4.5%, 5/15/38 0.68 -------------------------------------------------------------------------------- 8. U.S. Treasury Notes, 4.5%, 2/15/36 0.59 -------------------------------------------------------------------------------- 9. U.S. Treasury Notes, 4.25%, 5/15/39 0.59 -------------------------------------------------------------------------------- 10. Massachusetts Health, 5.5%, 11/15/36 0.56 -------------------------------------------------------------------------------- * 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 | 6/30/11 Prices and Distributions | 6/30/11 Net Asset Value per Share -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Class 6/30/11 6/30/10 -------------------------------------------------------------------------------- A $9.66 $9.44 -------------------------------------------------------------------------------- B $9.60 $9.38 -------------------------------------------------------------------------------- C $9.55 $9.34 -------------------------------------------------------------------------------- R $9.74 $9.52 -------------------------------------------------------------------------------- Y $9.57 $9.36 -------------------------------------------------------------------------------- Z $9.68 $9.46 -------------------------------------------------------------------------------- Distributions per Share: 7/1/10-6/30/11 -------------------------------------------------------------------------------- -------------------------------------------------------------------------------- Net Investment Short-Term Long-Term Class Income Capital Gains Capital Gains -------------------------------------------------------------------------------- A $0.4377 $ -- $ -- -------------------------------------------------------------------------------- B $0.3351 $ -- $ -- -------------------------------------------------------------------------------- C $0.3494 $ -- $ -- -------------------------------------------------------------------------------- R $0.4064 $ -- $ -- -------------------------------------------------------------------------------- Y $0.4575 $ -- $ -- -------------------------------------------------------------------------------- Z $0.4591 $ -- $ -- -------------------------------------------------------------------------------- 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 | 6/30/11 9 Performance Update | 6/30/11 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, 2011) ----------------------------------------------------------------------- Net Asset Public Offering Period Value (NAV) Price (POP) ----------------------------------------------------------------------- 10 Years 6.38% 5.90% 5 Years 7.20 6.22 1 Year 7.08 2.31 ----------------------------------------------------------------------- Expense Ratio (Per prospectus dated November 1, 2010) ----------------------------------------------------------------------- Gross Net ----------------------------------------------------------------------- 1.07% 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 6/01 9,550 10,000 10,275 10,863 6/03 11,445 11,992 11,786 12,031 6/05 12,687 12,849 12,529 12,746 6/07 13,194 13,526 14,070 14,489 6/09 14,443 15,365 16,567 16,825 6/11 17,740 17,481 Call 1-800-225-6292 or visit www.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 | 6/30/11 Performance Update | 6/30/11 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, 2011) ----------------------------------------------------------- If If Period Held Redeemed ----------------------------------------------------------- 10 Years 5.40% 5.40% 5 Years 6.14 6.14 1 Year 5.99 1.99 ----------------------------------------------------------- Expense Ratio (Per prospectus dated November 1, 2010) ----------------------------------------------------------- Gross Net ----------------------------------------------------------- 1.98% 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 6/01 10,000 10,000 10,678 10,863 6/03 11,793 11,992 12,033 12,031 6/05 12,842 12,849 12,567 12,746 6/07 13,102 13,526 13,849 14,489 6/09 14,073 15,365 15,969 16,825 6/11 16,925 17,481 Call 1-800-225-6292 or visit www.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). Effective December 1, 2004, the period during which a CDSC is applied to withdrawals was shortened to 5 years. The maximum CDSC for Class B shares is 4% and declines over five years. For more complete information, please see the prospectus. Note: Shares purchased prior to December 1, 2004, remain subject to the CDSC in effect at the time you purchased those shares. For performance information for shares purchased prior to December 1, 2004, please visit www.pioneerinvestments.com. 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, 2012, 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 | 6/30/11 11 Performance Update | 6/30/11 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, 2011) ----------------------------------------------------------- If If Period Held Redeemed ----------------------------------------------------------- 10 Years 5.42% 5.42% 5 Years 6.23 6.23 1 Year 6.06 6.06 ----------------------------------------------------------- Expense Ratio (Per prospectus dated November 1, 2010) ----------------------------------------------------------- Gross Net ----------------------------------------------------------- 1.79% 1.79% ----------------------------------------------------------- [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 6/01 10,000 10,000 10,654 10,863 6/03 11,749 11,992 11,998 12,031 6/05 12,799 12,849 12,532 12,746 6/07 13,082 13,526 13,840 14,489 6/09 14,065 15,365 15,982 16,825 6/11 16,951 17,481 Call 1-800-225-6292 or visit www.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 net expense ratio reflects contractual expense limitations currently in effect through November 1, 2012, for Class C shares. There can be no assurance that Pioneer will extend the expense limitations 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. 12 Pioneer Bond Fund | Annual Report | 6/30/11 Performance Update | 6/30/11 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, 2011) ----------------------------------------------------------- If If Period Held Redeemed ----------------------------------------------------------- 10 Years 6.06% 6.06% 5 Years 6.81 6.81 1 Year 6.67 6.67 ----------------------------------------------------------- Expense Ratio (Per prospectus dated November 1, 2010) ----------------------------------------------------------- Gross Net ----------------------------------------------------------- 1.26% 1.25% ----------------------------------------------------------- [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 6/01 10,000 10,000 10,702 10,863 6/03 11,878 11,992 12,258 12,031 6/05 13,149 12,849 12,961 12,746 6/07 13,614 13,526 14,452 14,489 6/09 14,792 15,365 16,889 16,825 6/11 18,015 17,481 Call 1-800-225-6292 or visit www.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 net expense ratio reflects the contractual expense limitation currently in effect through November 1, 2012, for Class R 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 | 6/30/11 13 Performance Update | 6/30/11 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, 2011) ----------------------------------------------------------- If If Period Held Redeemed ----------------------------------------------------------- 10 Years 6.75% 6.75% 5 Years 7.49 7.49 1 Year 7.25 7.25 ----------------------------------------------------------- Expense Ratio (Per prospectus dated November 1, 2010) ----------------------------------------------------------- Gross Net ----------------------------------------------------------- 0.61% 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 6/01 5,000,000 5,000,000 5,395,480 5,431,331 6/03 6,035,601 5,996,231 6,245,430 6,015,411 6/05 6,749,281 6,424,551 6,696,908 6,372,801 6/07 7,075,469 6,762,861 7,564,660 7,244,591 6/09 7,787,803 7,682,661 8,960,605 8,412,390 6/11 9,610,304 8,740,590 Call 1-800-225-6292 or visit www.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 net expense ratio reflects contractual expense limitations currently in effect through June 1, 2012, for Class Y shares. There can be no assurance that Pioneer will extend the expense limitations 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. 14 Pioneer Bond Fund | Annual Report | 6/30/11 Performance Update | 6/30/11 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, 2011) ----------------------------------------------------------- If If Period Held Redeemed ----------------------------------------------------------- 10 Years 6.41% 6.41% 5 Years 7.26 7.26 1 Year 7.30 7.30 ----------------------------------------------------------- Expense Ratio (Per prospectus dated November 1, 2010) ----------------------------------------------------------- Gross Net ----------------------------------------------------------- 0.63% 0.63% ----------------------------------------------------------- [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 6/01 10,000 10,000 10,755 10,863 6/03 11,979 11,992 12,336 12,031 6/05 13,280 12,849 13,114 12,746 6/07 13,674 13,526 14,629 14,489 6/09 15,129 15,365 17,350 16,825 6/11 18,616 17,481 Call 1-800-225-6292 or visit www.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 | 6/30/11 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, 2011 through June 30, 2011. --------------------------------------------------------------------------------------------------------------------- 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 1/1/11 --------------------------------------------------------------------------------------------------------------------- Ending Account Value $1,070.80 $1,059.90 $1,060.60 $1,066.70 $1,072.50 $1,073.00 (after expenses) on 6/30/11 --------------------------------------------------------------------------------------------------------------------- Expenses Paid $4.29 $9.56 $8.70 $6.25 $3.08 $3.28 During Period* --------------------------------------------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized expense ratio of 0.85%, 1.90%, 1.73%, 1.24%, 0.61%, 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 181/365 (to reflect the one-half year period). 16 Pioneer Bond Fund | Annual Report | 6/30/11 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, 2011 through June 30, 2011. --------------------------------------------------------------------------------------------------------------------- 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 1/1/11 --------------------------------------------------------------------------------------------------------------------- Ending Account Value $1,020.58 $1,015.37 $1,016.22 $1,018.65 $1,021.77 $1,021.57 (after expenses) on 6/30/11 --------------------------------------------------------------------------------------------------------------------- Expenses Paid $4.26 $9.49 $8.65 $6.21 $3.06 $3.26 During Period* --------------------------------------------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized expense ratio of 0.85%, 1.90%, 1.73%, 1.24%, 0.61%, and 0.65% for Class A, Class B, Class C, Class R, Class Y, and Class Z shares, respectively, multiplied by the average account value over the period, multiplied by 181/365 (to reflect the one-half year period). Pioneer Bond Fund | Annual Report | 6/30/11 17 Schedule of Investments | 6/30/11 ----------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value ----------------------------------------------------------------------------------------------------- CONVERTIBLE CORPORATE BONDS -- 0.7% ENERGY -- 0.2% Coal & Consumable Fuels -- 0.2% 2,680,000 BB-/NR Massey Energy Co., 3.25%, 8/1/15 $ 2,844,150 -------------- Total Energy $ 2,844,150 ----------------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 0.1% Health Care Services -- 0.1% 766,000 B+/B2 Omnicare, Inc., 3.25%, 12/15/35 $ 732,488 -------------- Total Health Care Equipment & Services $ 732,488 ----------------------------------------------------------------------------------------------------- SEMICONDUCTORS -- 0.4% Semiconductors -- 0.4% 4,725,000 A-/NR Intel Corp., 2.95%, 12/15/35 (b) $ 4,884,469 -------------- Total Semiconductors $ 4,884,469 ----------------------------------------------------------------------------------------------------- TOTAL CONVERTIBLE CORPORATE BONDS (Cost $7,201,749) $ 8,461,107 ----------------------------------------------------------------------------------------------------- Shares ----------------------------------------------------------------------------------------------------- PREFERRED STOCKS -- 1.7% BANKS -- 0.4% Diversified Banks -- 0.4% 5,610 Wells Fargo & Co., 7.5%, 12/31/49 $ 5,943,795 -------------- Total Banks $ 5,943,795 ----------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 0.2% Diversified Financial Services -- 0.2% 116,000 Citigroup Capital XIII, 7.875%, 10/30/40 $ 3,222,480 -------------- Total Diversified Financials $ 3,222,480 ----------------------------------------------------------------------------------------------------- INSURANCE -- 0.3% Life & Health Insurance -- 0.3% 153,800 Delphi Financial Group, 7.376%, 5/15/37 $ 3,771,176 -------------- Total Insurance $ 3,771,176 ----------------------------------------------------------------------------------------------------- REAL ESTATE -- 0.8% Real Estate Operating Companies -- 0.8% 150,400 Forest City Enterprises, Inc., 7.0%, 12/31/49 (b) $ 10,226,598 -------------- Total Real Estate $ 10,226,598 ----------------------------------------------------------------------------------------------------- TOTAL PREFERRED STOCKS (Cost $20,918,099) $ 23,164,049 ----------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 18 Pioneer Bond Fund | Annual Report | 6/30/11 ----------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value ----------------------------------------------------------------------------------------------------- ASSET BACKED SECURITIES -- 8.1% MATERIALS -- 1.1% Diversified Metals & Mining -- 0.1% 1,871,345 NR/A1 Bombardier Capital Mortgage Securitization Corp., 6.65%, 4/15/28 $ 1,970,102 ---------------------------------------------------------------------------------------------------- Precious Metals & Minerals -- 0.3% 744,439 BBB+/A2 Lehman ABS Manufactured Housing Contract Trust, 5.873%, 5/15/22 $ 786,629 2,200,000 BBB+/Ba3 Madison Avenue Manufactured Housing, 2.4626%, 3/25/32 2,147,875 923,044 A/NR Mid-State Trust, 5.25%, 11/1/20 917,150 940,382 5.91 AA/Aa2 Origen Manufactured Housing, Floating Rate Note, 1/15/35 997,580 -------------- $ 4,849,234 ---------------------------------------------------------------------------------------------------- Steel -- 0.7% 428,800 AAA/Aaa Accredited Mortgage Loan Trust, 0.8015%, 10/25/34 $ 388,518 1,538,806 AAA/Aa1 Centex Home Equity, 3.173%, 6/25/33 1,516,665 4,700,000 AAA/Aa2 First NLC Trust, 0.74719%, 9/25/35 4,387,478 3,647,238 0.66 AA+/Aa3 Nomura Home Equity Loan, Inc., Floating Rate Note, 5/25/35 3,494,302 -------------- $ 9,786,963 -------------- Total Materials $ 16,606,299 ---------------------------------------------------------------------------------------------------- COMMERCIAL SERVICES & SUPPLIES -- 0.1% Research & Consulting Services -- 0.1% 793,333 A/NR TAL Advantage LLC, 4.31%, 5/20/26 $ 779,509 -------------- Total Commercial Services & Supplies $ 779,509 ---------------------------------------------------------------------------------------------------- AUTOMOBILES & COMPONENTS -- 0.4% Automobile Manufacturers -- 0.4% 650,000 BBB/Baa1 AMCAR, 4.2%, 11/8/16 $ 673,702 500,000 BBB/Baa1 AmeriCredit Automobile Receivables Trust, 4.04%, 7/10/17 496,697 1,350,000 NR/Aa1 Santander Drive Auto Receivables Trust, 2.44%, 1/15/16 1,348,731 2,960,000 BBB/NR Santander Drive Auto Receivables Trust, 3.35%, 6/15/17 2,957,336 -------------- $ 5,476,466 -------------- Total Automobiles & Components $ 5,476,466 ---------------------------------------------------------------------------------------------------- BANKS -- 2.7% Diversified Banks -- 0.1% 1,170,937 0.28 AAA/Aa1 Wells Fargo Home Equity , Floating Rate Note, 4/25/37 $ 1,133,418 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/11 19 Schedule of Investments | 6/30/11 (continued) ----------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value ----------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- 2.6% 1,058,560 AAA/Aaa 321 Henderson Receivables I LLC, 3.82%, 12/15/48 $ 1,046,363 612,249 0.24 AAA/Baa1 Carrington Mortgage Loan Trust, Floating Rate Note, 1/25/37 604,193 310,276 0.68 AA/Aa1 Carrington Mortgage Loan Trust, Floating Rate Note, 2/25/35 308,516 416,731 0.59 AAA/Baa3 Carrington Mortgage Loan Trust, Floating Rate Note, 9/25/35 371,417 2,791,000 5.94 A/B1 Citicorp Residential Mortgage Securities, Inc., Floating Rate Note, 7/25/36 2,727,750 1,700,000 AAA/B2 Citicorp Residential Mortgage Securities, Inc., 5.892%, 3/25/37 1,625,107 600,000 AAA/B2 Citicorp Residential Mortgage Securities, Inc., 5.775%, 9/25/36 589,682 608,720 BBB/Baa3 Citigroup Mortgage Loan Trust, 0.34606%, 1/25/37 591,542 1,003,847 0.60 AA+/Aa1 Citigroup Mortgage Loan Trust, Floating Rate Note, 7/25/35 964,726 2,575,000 0.74 AA+/A3 Countrywide Asset-Backed Certificates, Floating Rate Note, 11/25/35 2,359,272 1,047,000 0.65 AA+/Aa2 Countrywide Asset-Backed Certificates, Floating Rate Note, 8/25/35 965,721 913,497 0.61 AA+/Aa1 Countrywide Asset-Backed Certificates, Floating Rate Note, 8/25/35 898,578 2,509,745 5.07 AAA/Ba2 Countrywide Asset-Backed Certificates, Floating Rate Note, 12/25/35 2,352,379 2,816,129 BBB/Baa3 Countrywide Home Equity Loan Trust, 0.5371%, 11/15/28 2,666,697 700,000 6.25 AA/B1 Credit-Based Asset Servicing, Floating Rate Note, 10/25/36 697,070 1,445,288 0.89 AA+/Aa2 Credit-Based Asset Servicing, Floating Rate Note, 5/25/50 1,385,155 696,726 5.56 AAA/A2 CRMSI 2006-2 A3, Floating Rate Note, 9/25/36 698,562 1,507,483 AAA/A1 FBR Securitization Trust, 2.76188%, 9/25/35 1,425,536 555,476 0.73 AAA/Aaa First Franklin Mortgage Loan Asset-Backed Certificate, Floating Rate Note, 9/24/34 525,642 361,147 0.30 A/A2 Fremont Home Loan Trust, Floating Rate Note, 2/25/36 358,103 1,700,000 0.72 AA+/A1 GSAA Trust, Floating Rate Note, 6/25/35 1,629,955 584,165 0.62 A/A2 GSAMP Trust, Floating Rate Note, 3/25/35 556,629 230,108 0.56 AAA/Aaa GSAMP Trust, Floating Rate Note, 8/25/36 225,829 The accompanying notes are an integral part of these financial statements. 20 Pioneer Bond Fund | Annual Report | 6/30/11 ------------------------------------------------------------------------------------------------------ Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------ Thrifts & Mortgage Finance -- (continued) 717,852 0.57 AAA/Aa1 GSAMP Trust, Floating Rate Note, 9/25/35 $ 693,502 1,200,000 AA/NR Lead II Receivables, 4.9%, 3/20/13 1,189,920 4,909,143 CCC+/Caa3 Local Insight Media Finance LLC, 5.88%, 10/23/37 2,160,023 497,544 0.25 B/Ba3 Morgan Stanley ABS Capital, Inc. Floating Rate Note, 12/25/36 473,355 919,622 BB-/B1 Morgan Stanley Home Equity, 0.28125%, 12/25/36 900,212 824,333 0.29 BB-/Ba3 Morgan Stanley Home Equity Loan, Floating Rate Note, 4/25/37 772,734 31,605 A-/Caa2 Morgan Stanley Ixis Real Estate, 1.445%, 11/25/36 10,851 1,289,357 0.00 AAA/Aa3 Option One Mortgage Loan Trust, Floating Rate Note, 11/25/35 1,216,811 408,050 0.00 A/Aa3 Option One Mortgage Loan Trust, Floating Rate Note, 2/25/38 398,632 1,500,000 0.67 AA+/A3 RASC 2005-KS7 M1, Floating Rate Note, 8/25/35 1,432,461 -------------- $ 34,822,925 -------------- Total Banks $ 35,956,343 ------------------------------------------------------------------------------------------------------ DIVERSIFIED FINANCIALS -- 2.1% Diversified Finance Services -- 0.8% 287,782 0.63 AA/Aa2 Asset Backed Securities Corp., Floating Rate Note, 4/25/35 $ 279,214 1,700,000 A/NR DT Auto Owner Trust, 3.46%, 1/15/14 1,714,385 1,400,000 BBB/NR DT Auto Owner Trust, 4.89%, 1/17/17 1,411,085 722,307 AA/NR DT Auto Owner Trust, 5.92%, 10/15/15 745,437 1,952,810 AAA/Aaa Home Equity Asset Trust, 0.75719%, 11/25/35 1,886,746 423,988 0.43 AAA/A1 JP Morgan Mortgage Acquisition, Floating Rate Note, 12/25/35 383,221 3,300,000 0.68 AA-/A3 Long Beach Mortgage Loan Trust, Floating Rate Note, 4/25/35 2,895,575 279,509 AAA/Aaa Nelnet Student Loan Trust, 0.318%, 12/27/16 279,346 800,000 A/NR Prestige Auto Receivables Trust, 3.9%, 7/16/18 805,368 -------------- $ 10,400,377 ------------------------------------------------------------------------------------------------------ Specialized Finance -- 1.3% 2,896,367 0.46 AA+/A1 Aegis Asset Backed Securities, Floating Rate Note, 3/25/12 $ 2,538,295 2,895,000 BBB-/Baa3 Dominos Pizza Master Issuer LLC, 5.261%, 4/25/37 2,931,188 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/11 21 Schedule of Investments | 6/30/11 (continued) ------------------------------------------------------------------------------------------------------ Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------ Specialized Finance -- (continued) 5,325,000 BB/Aaa Dominos Pizza Master Issuer LLC, 7.629%, 4/25/37 $ 5,431,500 800,000 5.32 A/A2 Irwin Home Equity Co., Floating Rate Note, 4/25/30 629,028 2,261,031 0.89 NR/Baa1 Irwin Home Equity Corp., Floating Rate Note, 6/25/35 2,174,922 1,800,000 AA/Aa3 Master Asset Backed Securities, 0.79718%, 3/25/35 1,599,336 323,885 AA+/Aa1 Master Asset Backed Securities Trust, 0.67375%, 5/25/35 315,673 908,073 0.54 AAA/Aaa New Century Home Equity Loan, Floating Rate Note, 3/25/35 801,174 900,000 0.63 AAA/Aaa SLMA 2004-10 A6B, Floating Rate Note, 4/27/26 899,730 -------------- $ 17,320,846 -------------- Total Diversified Financials $ 27,721,223 ------------------------------------------------------------------------------------------------------ REAL ESTATE -- 0.9% Mortgage Real Estate Investment Trusts -- 0.9% 5,000,000 A+/NR FREMF Mortgage Trust, 4.437%, 11/25/17 $ 4,884,947 1,500,000 NR/NR FREMF Mortgage Trust, 4.598%, 11/25/49 1,422,296 1,750,000 NR/A3 FREMF Mortgage Trust, 4.77055%, 4/25/44 1,690,391 640,000 NR/NR FREMF Mortgage Trust, 5.163344%, 9/25/45 630,715 600,000 A+/NR FREMF Mortgage Trust, 5.237%, 9/25/43 595,351 850,000 A+/A3 FREMF Mortgage Trust, 5.434669%, 4/25/20 867,056 1,994,112 NR/NR Real Estate Asset Trust, 5.44%, 6/25/31 1,994,112 -------------- $ 12,084,868 -------------- Total Real Estate $ 12,084,868 ------------------------------------------------------------------------------------------------------ GOVERNMENT -- 0.8% Government -- 0.8% 47,238 AAA/Aaa Federal Home Loan Bank, 6.0%, 4/15/32 $ 47,760 3,743,000 AAA/Aaa FHR 3211 PB, 5.5%, 2/15/33 3,987,972 698,337 AAA/Aaa Freddie Mac, 5.0%, 8/15/35 732,045 5,000,000 NR/NR Freddie Mac REMICS, 5.0%, 6/15/33 5,383,782 124,506 AAA/Aaa Freddie Mac, 6.1%, 9/15/18 128,868 -------------- $ 10,280,427 -------------- Total Government $ 10,280,427 ------------------------------------------------------------------------------------------------------ TOTAL ASSET BACKED SECURITIES (Cost $109,747,198) $ 108,905,135 ------------------------------------------------------------------------------------------------------ The accompanying notes are an integral part of these financial statements. 22 Pioneer Bond Fund | Annual Report | 6/30/11 --------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------- COLLATERALIZED MORTGAGE OBLIGATIONS -- 16.4% MATERIALS -- 0.5% Forest Products -- 0.5% 1,435,000 AA/Aa3 TSTAR 2006-1 B, 5.7467%, 10/15/36 $ 1,527,303 4,470,000 AAA/Aa1 TSTAR 2006-1A A, 5.668%, 10/15/36 4,827,733 -------------- $ 6,355,036 -------------- Total Materials $ 6,355,036 --------------------------------------------------------------------------------------------------- BANKS -- 11.5% Thrifts & Mortgage Finance -- 11.5% 1,973,118 NR/Ba3 Banc of America Alternative Loan Trust, 5.5%, 1/25/20 $ 1,986,458 2,807,837 NR/Ba2 Banc of America Alternative Loan Trust, 5.0%, 7/25/19 2,839,009 2,396,947 NR/Baa3 Banc of America Alternative Loan Trust, 6.0%, 3/25/34 2,456,845 1,704,101 NR/B2 Banc of America Alternative Loan Trust, 5.25%, 5/25/19 1,723,395 1,342,469 AAA/Aa3 Banc of America Alternative Loan Trust, 5.75%, 4/25/33 1,404,227 2,344,911 NR/Baa2 Banc of America Alternative Loan Trust, 5.5%, 9/25/33 2,419,878 2,427,477 BB-/A Banc of America Funding Corp., 0.4013%, 9/25/36 2,310,958 1,094,923 AAA/NR Banc of America Funding Corp., 5.5%, 1/25/36 1,126,779 1,516,701 AAA/Aaa Bayview Commercial Asset Trust, 0.67375%, 4/25/34 1,325,200 15,676,261 AAA/A1 Bayview Commercial Asset Trust, 2.65868%, 7/25/37 1,337,185 10,197,760 AA/A3 Bayview Commercial Asset Trust, 2.83149%, 9/25/37 917,798 922,000 AAA/A2 BCAP LLC Trust, 5.0%, 11/25/36 940,092 2,217,809 2.45 AAA/Baa2 Bear Stearns Adjustable Rate Mortgage, Floating Rate Note, 8/25/33 2,111,554 724,403 AAA/A3 Chase Mortgage Finance Corp., 5.0%, 10/25/33 734,163 2,574,231 NR/Ba3 Chase Mortgage Finance Corp., 5.5%, 5/25/35 2,489,904 2,068,087 AAA/Aaa Citigroup Commercial Mortgage, 4.639%, 5/15/43 2,080,185 784,828 AAA/Aaa Commercial Mortgage, 0.48705%, 11/15/17 758,128 1,710,660 AAA/Aaa Commercial Mortgage Pass Through Certificates, 0.538%, 11/15/17 1,614,275 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/11 23 Schedule of Investments | 6/30/11 (continued) Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value Thrifts & Mortgage Finance -- (continued) 897,610 AAA/Ba1 Countrywide Alternative Loan Trust, 4.25%, 4/25/34 $ 902,355 1,492,882 AAA/B2 Countrywide Alternative Loan Trust, 5.5%, 1/25/35 1,512,381 6,647,769 BBB/NR Countrywide Alternative Loan Trust, 5.5%, 4/25/35 3,801,786 1,990,646 AAA/NR Countrywide Alternative Loan Trust, 5.5%, 8/25/34 1,852,995 1,566,334 AAA/Ba2 Countrywide Alternative Loan Trust, 5.5%, 4/25/34 1,581,706 1,707,920 0.64 AAA/NR Countrywide Alternative Loan Trust, Floating Rate Note, 8/25/18 1,631,315 1,594,082 AAA/B2 Countrywide Alternative Loan Trust, 4.75%, 10/25/33 1,599,261 2,294,304 AAA/NR Countrywide Alternative Loan Trust, 5.75%, 12/25/33 2,362,670 1,834,026 B-/Ba1 Countrywide Home Loan, 4.5%, 9/25/35 1,709,984 2,170,827 AAA/Baa3 Countrywide Home Loan Mortgage Pass Through Trust, 4.867257%, 12/25/33 2,008,445 562,998 AAA/Aa3 Downey Savings & Loan, 0.83625%, 7/19/44 423,070 1,250,000 A/A2 Extended Stay America Trust, 4.8603%, 11/5/27 1,247,878 602,853 NR/Baa1 First Horizon Asset Securities, Inc., 5.6329%, 10/25/34 619,247 1,006,503 A-/NR First Horizon Asset Securities, Inc., 6.0%, 5/25/36 1,001,909 800,000 A/A2 GMAC Commercial Mortgage Securities, Inc., 5.307%, 4/10/40 798,480 3,375,000 AAA/Aaa GMAC Commercial Mortgage Securities, Inc., 4.864%, 12/10/41 3,580,221 1,863,792 AAA/Aaa GS Mortgage Securities Corp. II, 7.12%, 11/18/29 1,958,723 678,006 0.91 AAA/A1 Impac CMB Trust, Floating Rate Note, 10/25/34 625,474 1,086,266 0.59 NR/Aaa Impac CMB Trust, Floating Rate Note, 11/25/35 878,741 734,293 0.99 AAA/Aaa Impac Securities Assets Corp., Floating Rate Note, 11/25/34 683,880 1,271,076 0.54 AAA/Aaa Impac Securities Assets Corp., Floating Rate Note, 5/25/36 1,177,915 1,600,000 AAA/NR JP Morgan Chase Commercial Mortgage Securities Corp., 3.6159%, 11/15/43 1,563,133 1,100,000 A-/Aa3 JP Morgan Chase Commercial Mortgage Securities Corp., 0.34205%, 5/15/47 1,019,421 The accompanying notes are an integral part of these financial statements. 24 Pioneer Bond Fund | Annual Report | 6/30/11 ------------------------------------------------------------------------------------------------------ Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------ Thrifts & Mortgage Finance -- (continued) 1,935,241 AAA/A2 JP Morgan Mortgage Trust, 2.657%, 2/25/34 $ 1,923,629 1,078,179 AAA/NR JP Morgan Mortgage Trust, 2.675589%, 7/25/34 1,025,744 3,270,634 AAA/Aa3 JP Morgan Mortgage Trust, 4.498731%, 10/25/33* 3,327,978 2,962,094 AAA/Ba2 JP Morgan Mortgage Trust, 6.0%, 8/25/34 2,761,883 1,750,000 AAA/Aaa JPMCC 2002-C3 B, 5.146%, 7/12/35 1,810,659 1,629,058 5.50 AAA/A2 JPMMT 2004-A1 3A1, Floating Rate Note, 2/25/34 1,657,586 2,800,000 BBB+/NR LB-UBS Commercial Mortgage, 5.616%, 10/15/35 2,733,933 1,164,543 AAA/A3 Lehman Brothers Small Balance Commercial, 5.41%, 12/25/36 1,145,704 1,196,891 0.44 AAA/Aa1 Lehman Brothers Small Balance Commercial, Floating Rate Note, 2/25/30 1,011,174 572,666 1.04 AAA/Aa1 Lehman Brothers Small Balance, Floating Rate Note, 10/25/37 542,811 1,508,612 BB+/B3 Master Adjustable Rate Mortgages Trust, 5.194229%, 1/25/35 1,366,004 818,472 AAA/A1 Master Adjustable Rate Mortgages Trust, 2.86771%, 4/21/34 797,038 2,608,510 AAA/NR Master Alternative Loans Trust, 5.5%, 2/25/35 2,684,864 1,321,596 AAA/NR Master Alternative Loans Trust, 4.5%, 1/25/15 1,320,817 584,549 AA-/NR Master Alternative Loans Trust, 5.5%, 1/25/35 597,192 1,639,966 AA/NR Master Alternative Loans Trust, 5.5%, 10/25/19 1,673,500 3,620,427 AAA/AAA Master Alternative Loans Trust, 6.0%, 7/25/34 3,657,540 1,816,209 6.75 BBB/NR Master Seasoned Securities Trust, Floating Rate Note, 9/25/32 1,905,325 520,613 AAA/Aaa Merrill Lynch Mortgage Trust, 4.556%, 6/12/43 526,176 348,850 5.44 AAA/Aaa Merrill Lynch/Countrywide Commercial, Floating Rate Note, 2/12/39 348,681 2,600,180 AAA/A1 MLCC Mortgage Investors, Inc., 0.48344%, 3/25/30 2,299,074 1,602,640 0.42 AAA/Baa2 MLCC Mortgage Investors, Inc., Floating Rate Note, 4/25/29 1,475,254 2,950,000 NR/NR Morgan Stanley Remic Trust, 5.0%, 11/26/36 2,868,875 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/11 25 Schedule of Investments | 6/30/11 (continued) ------------------------------------------------------------------------------------------------------ Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------ Thrifts & Mortgage Finance -- (continued) 1,566,750 NR/Aa3 PHH Mortgage Capital, 6.6%, 12/25/27 $ 1,547,617 936,757 BBB/B2 RAAC Series, 6.0%, 1/25/32 946,868 2,219,987 AAA/NR Residential Asset Securitization Trust, 5.5%, 7/25/35 2,080,252 1,679,267 AAA/NR Residential Asset Securitization Trust, 5.25%, 11/25/34 1,713,671 1,241,965 A+/NR Residential Asset Securitization Trust, 5.5%, 2/25/35 1,252,287 980,177 AAA/Baa3 Residential Funding Mortgage Securities I, Inc., 5.0%, 5/25/18 1,018,052 8,510,000 5.54 CCC+/Caa3 SASC 2007 BHC1 A1, Floating Rate Note, 12/18/49 2,792,982 2,890,000 5.58 D/NR SASC 2007 BHC1 A2, Floating Rate Note, 12/18/49 (g) 232,842 1,691,635 0.81 AAA/Baa2 Sequoia Mortgage Trust, Floating Rate Note, 3/20/35 1,383,350 1,807,457 0.41 AAA/Baa1 Sequoia Mortgage Trust, Floating Rate Note, 9/20/33 1,651,161 1,543,209 AAA/A3 Sequoia Mortgage Trust, 0.74969%, 1/20/35 1,252,941 1,315,367 A/B2 Structured Asset Securities, 5.0%, 5/25/35 1,293,872 1,988,857 AAA/Ba1 Thornburg Mortgage Securities Trust, 4.1376%, 3/25/44 1,969,853 858,045 0.93 AAA/A2 Thornburg Mortgage Securities Trust, Floating Rate Note, 9/25/44 799,099 2,299,680 AAA/Aaa Wachovia Bank Commercial Mortgage Trust, 4.957%, 8/15/35 2,298,477 3,787,250 AAA/Aaa Wachovia Bank Commercial Mortgage Trust, 4.803%, 10/15/41 4,056,690 2,500,000 A+/NR Wachovia Bank Commercial Mortgage Trust, 5.606%, 4/15/35 2,545,595 780,286,977 0.01 AAA/Aaa Wachovia Bank Commercial Mortgage Trust, Floating Rate Note, 6/15/45 1,006,024 468,329 BB/NR WaMu Mortgage Pass Through Certificates, 4.82069%, 9/25/35 452,017 2,545,393 AAA/NR WaMu Mortgage Pass Through Certificates, 2.73272%, 1/25/35 2,444,376 393,941 BB/NR WaMu Mortgage Pass Through Certificates, 2.77149%, 9/25/35 340,973 2,167,772 0.42 AAA/Caa1 WaMu Mortgage Pass Through Certificates, Floating Rate Note, 4/25/45 1,795,797 1,450,000 AAA/Aaa WBCMT 2003-C9 B, 5.109%, 12/15/35 1,482,542 3,755,348 NR/Aaa Wells Fargo Commercial Mortgage, 3.349%, 10/15/57 3,768,567 The accompanying notes are an integral part of these financial statements. 26 Pioneer Bond Fund | Annual Report | 6/30/11 ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) 933,711 5.62 A-/NR Wells Fargo Mortgage Backed Securities Trust, Floating Rate Note, 4/25/36 $ 921,249 1,257,080 AAA/A1 Wells Fargo Mortgage Backed Securities Trust, 5.0%, 11/25/36 1,268,886 1,038,955 AAA/Baa1 Wells Fargo Mortgage Backed Securities Trust, 5.5%, 5/25/35 1,036,492 1,164,573 2.75 NR/Ba3 Wells Fargo Mortgage Backed Securities Trust, Floating Rate Note, 1/25/35 1,069,947 713,214 2.78 AAA/Aa1 Wells Fargo Mortgage Backed Securities Trust, Floating Rate Note, 10/25/34 706,166 729,971 2.78 AAA/Aa1 Wells Fargo Mortgage Backed Securities Trust, Floating Rate Note, 10/25/35 705,717 698,060 4.53 AAA/A1 Wells Fargo Mortgage Backed Securities Trust, Floating Rate Note, 11/25/33 691,295 279,105 2.74 AAA/A2 Wells Fargo Mortgage Backed Securities Trust, Floating Rate Note, 6/25/34 268,209 350,000 NR/A2 Wells Fargo Mortgage Backed Securities Trust, 5.392%, 2/15/44 328,738 2,890,532 AAA/Ba2 Wells Fargo Mortgage Backed Securities Trust, 4.75%, 12/25/18 2,983,952 -------------- $ 154,685,020 -------------- Total Banks $ 154,685,020 ------------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 3.7% Asset Management & Custody Banks -- 0.1% 895,814 4.94 NR/NR Jefferies & Co., Inc., Floating Rate Note, 5/26/37 $ 874,172 ------------------------------------------------------------------------------------------------------- Consumer Finance -- 0.1% 1,168,957 AAA/Aaa GMAC Mortgage Corp., Loan Trust, 5.5%, 11/25/33 $ 1,180,619 ------------------------------------------------------------------------------------------------------- Diversified Financial Services -- 2.9% 2,028,408 AA-/NR Banc of America Mortgage, 5.5%, 11/25/34 $ 2,118,871 1,822,891 2.92 AAA/Aaa Banc of America Mortgage Securities, Inc., Floating Rate Note, 7/25/33 1,734,136 1,400,075 2.86 NR/Ba3 Banc of America Mortgage Securities, Inc., Floating Rate Note, 5/25/35 1,367,688 2,852,248 AAA/NR Banc of America Mortgage Securities, Inc., 5.75%, 1/25/35 2,917,739 1,476,400 3.23 AAA/Baa3 Banc of America Mortgage Securities, Inc., Floating Rate Note, 10/25/33 1,419,903 3,599,627 3.22 NR/Baa3 Banc of America Mortgage Securities, Inc., Floating Rate Note, 11/25/33 3,404,844 1,033,019 5.12 AAA/NR Banc of America Mortgage Securities, Inc., Floating Rate Note, 9/25/35 990,457 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/11 27 Schedule of Investments | 6/30/11 (continued) ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Diversified Financial Services -- (continued) 263,101 AAA/NR Banc of America Mortgage Securities, Inc., 5.0%, 8/25/33 $ 262,488 752,024 NR/A2 Citicorp Mortgage Securities I, 5.5%, 3/25/35 756,282 1,274,036 NR/B1 CMSI 2006-1 3A1, 5.0%, 2/25/36 1,271,190 2,950,000 BBB+/A2 Credit Suisse Mortgage Capital Certificates, 0.318%, 2/15/22 2,702,620 1,200,000 BBB/Aa1 Credit Suisse Mortgage Capital Certificates, 5.343%, 12/15/39 1,154,488 1,938,225 CCC/NR JPMorgan Alternative Loan Trust, 6.0%, 3/25/36 1,524,918 1,303,134 CCC/NR JPMorgan Alternative Loan Trust, 5.5%, 3/25/36 942,708 730,284 4.13 NR/NR La Hipotecaria SA, Floating Rate Note, 9/8/39 730,513 1,395,000 NR/A2 LSTAR Commercial Mortgage Trust, 5.7457%, 6/25/43 1,185,859 1,166,335 A+/Aaa MLMI 2005-A2 A4, 4.48%, 2/25/35 1,123,211 394,324 AAA/Aaa Morgan Stanley Capital I, 7.0%, 7/25/33 401,443 1,483,613 A/NR Nomura Resecuritization Trust, 5.235%, 3/26/36 1,472,486 2,342,626 5.50 AAA/B2 RALI 2004-QS16 1A1, Floating Rate Note, 12/25/34 2,370,412 4,760,735 NR/Ba1 Residential Accredit Loans, Inc., 5.0%, 5/25/19 4,764,444 1,885,519 AAA/NR Residential Accredit Loans, Inc., 6.0%, 10/25/34 1,913,387 2,396,051 NR/Ba3 Residential Accredit Loans, Inc., 5.0%, 8/25/18 2,417,467 966,075 B-/Caa3 Residential Accredit Loans, Inc., 0.49875%, 5/25/47 585,248 ----------- $39,532,802 ---------------------------------------------------------------------------------------------------- Investment Banking & Brokerage -- 0.6% 1,440,000 AAA/Aaa Banc of America Commercial Mortgage, Inc., 4.877%, 7/10/42 $ 1,532,224 1,326,154 NR/Aaa Banc of America Commercial Mortgage, Inc., 5.381%, 1/15/49 1,336,172 2,948,134 AA/NR Bear Stearns Commercial Mortgage Securities, 6.63%, 2/15/35 2,940,614 1,600,000 7.11 BBB+/Baa2 Bear Stearns Commercial Mortgage Securities, Floating Rate Note, 10/15/36 1,597,144 ----------- $ 7,406,154 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 28 Pioneer Bond Fund | Annual Report | 6/30/11 -------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value -------------------------------------------------------------------------------------------------- Specialized Finance -- 0.0% 622,812 AAA/NR CW Capital Cobalt, Ltd., 5.174%, 8/15/48 $ 636,802 -------------- Total Diversified Financials $ 49,630,549 -------------------------------------------------------------------------------------------------- REAL ESTATE -- 0.6% Mortgage Real Estate Investments Trusts -- 0.6% 1,988,871 1.54 AA+/Aa2 Credit Suisse First Boston Mortgage Securities Corp., Floating Rate Note, 12/25/33 $ 1,909,899 3,250,000 6.45 BBB/A3 Credit Suisse First Boston Mortgage Securities Corp., 6.448%, 9/15/34 3,245,540 675,000 A+/Baa2 Credit Suisse First Boston Mortgage Securities Corp., 7.165%, 12/15/35 684,633 400,000 4.52 A-/A3 Credit Suisse First Boston Mortgage Securities Corp., Floating Rate Note, 5/15/38 383,076 1,450,892 1.69 AA+/WR Credit Suisse First Boston Mortgage Securities Corp., Floating Rate Note, 8/25/33 1,361,012 -------------- $ 7,584,160 -------------- Total Real Estate $ 7,584,160 -------------------------------------------------------------------------------------------------- GOVERNMENT -- 0.1% Government -- 0.1% 1,063,878 AAA/Ba3 GSR Mortgage Loan Trust, 4.1408%, 6/25/34 $ 1,059,759 490,505 BBB-/NR GSR Mortgage Loan Trust, 2.911%, 1/25/35 458,490 300,810 BBB+/NR GSR Mortgage Loan Trust, 5.7199%, 2/25/34* 263,074 -------------- $ 1,781,323 -------------- Total Government $ 1,781,323 -------------------------------------------------------------------------------------------------- TOTAL COLLATERALIZED MORTGAGE OBLIGATIONS (Cost $229,751,785) $ 220,036,088 -------------------------------------------------------------------------------------------------- CORPORATE BONDS -- 34.8% ENERGY -- 3.7% Integrated Oil & Gas -- 0.1% 901,000 BBB+/Baa2 Marathon Oil Corp., 5.9%, 3/15/18 $ 1,021,030 710,120 BBB+/Baa1 PF Export Receivable Master Trust, 6.436%, 6/1/15 (144A) 756,278 -------------- $ 1,777,308 -------------------------------------------------------------------------------------------------- Oil & Gas Drilling -- 0.1% 1,025,000 BBB+/Baa1 Pride International, 6.875%, 8/15/20 $ 1,192,050 -------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/11 29 Schedule of Investments | 6/30/11 (continued) ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- Oil & Gas Equipment & Services -- 0.3% 820,000 3.42 NR/NR Sevan Marine ASA, Floating Rate Note, 5/14/13 (144A) $ 656,000 2,815,000 BBB/Baa2 Weatherford International Ltd., 9.625%, 3/1/19 3,635,409 -------------- $ 4,291,409 ------------------------------------------------------------------------------------------------------- Oil & Gas Exploration & Production -- 1.0% 2,180,000 BBB/Baa1 Canadian Natural Resources, 5.9%, 2/1/18 (b) $ 2,490,399 2,292,000 BB-/B1 Denbury Resources, Inc., 8.25%, 2/15/20 2,498,280 1,402,470 BBB+/NR Gazprom International SA, 7.201%, 2/1/20 RegS* 1,556,741 1,349,003 A/Aa3 Ras Laffan Liquefied Natural Gas Co., Ltd. III, 5.832%, 9/30/16 (144A) (b) 1,470,413 1,000,000 BBB-/Baa2 TNK-BP Finance SA, 6.625%, 3/20/17 (144A) 1,083,600 2,080,000 BBB-/Baa2 TNK-BP Finance SA, 7.5%, 7/18/16 (144A) 2,366,000 1,000,000 BBB-/Baa2 TNK-BP Finance SA, 7.875%, 3/13/18 (144A) 1,147,500 -------------- $ 12,612,933 ------------------------------------------------------------------------------------------------------- Oil & Gas Refining & Marketing -- 0.6% 1,150,000 B+/B1 Holly Energy Partners LP, 6.25%, 3/1/15 $ 1,150,000 2,475,000 BBB/Baa2 Spectra Energy Capital, 6.2%, 4/15/18 2,806,474 2,890,000 BBB/Baa2 Valero Energy Corp., 9.375%, 3/15/19 3,691,342 -------------- $ 7,647,816 ------------------------------------------------------------------------------------------------------- Oil & Gas Storage & Transportation -- 1.6% 435,000 BBB-/Baa2 Boardwalk Pipelines LLC, 5.5%, 2/1/17 $ 479,430 1,535,000 BBB/Baa3 Buckeye Partners LP, 6.05%, 1/15/18 1,726,163 2,900,000 BBB/Baa2 DCP Midstream, 9.75%, 3/15/19 3,790,228 3,250,000 BBB/Baa2 Kinder Morgan Energy, 5.95%, 2/15/18 3,621,069 3,500,000 BBB-/Baa3 Plains All America Pipeline, 6.125%, 1/15/17 3,916,546 3,885,000 A/A3 Questar Pipeline Co., 5.83%, 2/1/18 4,427,307 2,000,000 BB/Ba1 Southern Union Co., 7.2%, 11/1/66 1,860,000 1,500,000 BBB/Baa2 Spectra Energy Capital LLC, 6.75%, 7/15/18 1,700,556 -------------- $ 21,521,299 -------------- Total Energy $ 49,042,815 ------------------------------------------------------------------------------------------------------- MATERIALS -- 2.3% Aluminum -- 0.2% 2,425,000 BBB-/Baa3 Alcoa, Inc., 6.15%, 8/15/20 $ 2,569,006 ------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 30 Pioneer Bond Fund | Annual Report | 6/30/11 ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- Commodity Chemicals -- 0.2% 1,700,000 BB-/Ba2 Nova Chemicals Corp., 8.375%, 11/1/16 $ 1,870,000 ------------------------------------------------------------------------------------------------------- Construction Materials -- 0.3% 2,225,000 6.72 B-/BBB- C10 Capital SPV, Ltd., Floating Rate Note, 12/31/49 $ 1,646,500 2,260,000 6.64 B-/NR C8 Capital SPV, Ltd., Floating Rate Note, 12/31/49 1,672,400 475,000 BBB/Baa2 Holcim, Ltd., 6.0%, 12/30/19 (144A) 507,577 -------------- $ 3,826,477 ------------------------------------------------------------------------------------------------------- Diversified Metals & Mining -- 0.7% 3,085,000 BBB-/Baa3 AngloGold Ashanti Holdings, 5.375%, 4/15/20 $ 3,037,528 5,000,000 BBB-/Baa3 Gold Fields Orogen Holding BVI, 4.875%, 10/7/20 4,732,695 950,000 BBB/Baa2 Teck Resources, Ltd., 10.25%, 5/15/16 1,135,250 -------------- $ 8,905,473 ------------------------------------------------------------------------------------------------------- Fertilizers & Agricultural Chemicals -- 0.1% 1,500,000 BB+/Ba1 CF Industries Holdings, Inc., 6.875%, 5/1/18 $ 1,700,625 ------------------------------------------------------------------------------------------------------- Paper Products -- 0.1% 1,350,000 BBB/Ba1 Georgia-Pacific LLC, 5.4%, 11/1/20 $ 1,375,828 ------------------------------------------------------------------------------------------------------- Specialty Chemicals -- 0.2% 2,400,000 BBB/Baa2 Cytec Industries, Inc., 8.95%, 7/1/17 $ 2,992,390 ------------------------------------------------------------------------------------------------------- Steel -- 0.5% 3,900,000 BBB-/Baa3 ArcelorMittal, 6.125%, 6/1/18 $ 4,177,204 2,805,000 BBB-/Baa3 Commercial Metals Co., 7.35%, 8/15/18 2,994,893 -------------- $ 7,172,097 -------------- Total Materials $ 30,411,896 ------------------------------------------------------------------------------------------------------- CAPITAL GOODS -- 2.8% Aerospace & Defense -- 0.2% 3,020,000 BB/Ba3 Esterline Technology, 6.625%, 3/1/17 $ 3,125,700 ------------------------------------------------------------------------------------------------------- Building Products -- 0.3% 4,260,000 BBB/Ba2 Masco Corp., 7.125%, 3/15/20 (b) $ 4,360,689 ------------------------------------------------------------------------------------------------------- Construction & Farm Machinery & Heavy Trucks -- 0.1% 910,000 BBB+/Baa2 Cummins, Inc., 6.75%, 2/15/27 $ 981,766 600,000 BB/B2 Oshkosh Corp., 8.5%, 3/1/20 649,500 -------------- $ 1,631,266 ------------------------------------------------------------------------------------------------------- Electrical Component & Equipment -- 0.4% 2,665,000 BB/Ba2 Anixter International Corp., 5.95%, 3/1/15 $ 2,691,650 2,670,000 B+/Ba2 Belden CDT, Inc., 7.0%, 3/15/17 2,736,750 -------------- $ 5,428,400 ------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/11 31 Schedule of Investments | 6/30/11 (continued) -------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value -------------------------------------------------------------------------------------------------- Industrial Conglomerates -- 0.3% 2,950,000 BBB/Baa2 Tyco Electronics Group SA, 6.55%, 10/1/17 $ 3,475,832 525,000 A-/A3 Tyco International Finance SA, 8.5%, 1/15/19 665,549 -------------- $ 4,141,381 -------------------------------------------------------------------------------------------------- Industrial Machinery -- 0.4% 2,150,000 BBB+/Baa1 Ingersoll-Rand Global Holdings, 9.5%, 4/15/14 $ 2,581,610 1,810,000 BBB-/Baa3 Valmont Industries, Inc., 6.625%, 4/20/20 1,982,037 -------------- $ 4,563,647 -------------------------------------------------------------------------------------------------- Trading Companies & Distributors -- 1.1% 495,000 BB-/Ba2 Ace Hardware Corp., 9.125%, 6/1/16 (144A) $ 525,938 3,525,000 BBB-/BBB- Aviation Capital Group Corp., 6.75%, 4/6/21 3,477,589 5,660,000 BBB/Baa1 GATX Financial Corp., 6.0%, 2/15/18 6,146,545 3,450,000 BBB/Baa2 Glencore Funding LLC, 6.0%, 4/15/14 (144A) 3,752,793 -------------- $ 13,902,865 -------------- Total Capital Goods $ 37,153,948 -------------------------------------------------------------------------------------------------- COMMERCIAL SERVICES & SUPPLIES -- 0.3% Office Services & Supplies -- 0.3% 3,110,000 BBB+/A2 Pitney Bowes, Inc., 5.6%, 3/15/18 $ 3,356,990 -------------- Total Commercial Services & Supplies $ 3,356,990 -------------------------------------------------------------------------------------------------- TRANSPORTATION -- 0.0% Airlines -- 0.0% 603,045 BBB/Baa2 Southwest Airlines Co., 7.67%, 1/2/14 $ 626,323 -------------- Total Transportation $ 626,323 -------------------------------------------------------------------------------------------------- AUTOMOBILES & COMPONENTS -- 0.1% Automobile Manufacturers -- 0.1% 655,000 BBB/Baa2 Hyundai Motor Manufacturer, 4.5%, 4/15/15 $ 683,435 790,000 BBB+/Baa2 Nissan Motor Acceptance Corp., 4.5%, 1/30/15 (144A) 835,357 -------------- $ 1,518,792 -------------- Total Automobiles & Components $ 1,518,792 -------------------------------------------------------------------------------------------------- CONSUMER DURABLES & APPAREL -- 0.3% Household Appliances -- 0.3% 4,235,000 BBB-/Baa3 Whirlpool Corp., 5.5%, 3/1/13 $ 4,489,477 -------------- Total Consumer Durables & Apparel $ 4,489,477 -------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 32 Pioneer Bond Fund | Annual Report | 6/30/11 ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- CONSUMER SERVICES -- 0.3% Casinos & Gaming -- 0.0% 1,160,000 NR/WR Station Casinos, 6.625%, 3/15/18 (e) $ 116 ---------------------------------------------------------------------------------------------------- Education Services -- 0.3% 1,100,000 AAA/NR Massachusetts Institute of Technology, 5.6%, 7/1/11 $ 1,123,969 3,095,000 AAA/Aaa President & Fellows of Harvard, 6.3%, 10/1/37 3,386,209 -------------- $ 4,510,178 -------------- Total Consumer Services $ 4,510,294 ---------------------------------------------------------------------------------------------------- MEDIA -- 0.2% Broadcasting -- 0.2% 2,620,000 BBB+/Baa1 Grupo Telivisa SA, 6.0%, 5/15/18 (144A) $ 2,848,244 -------------- Total Media $ 2,848,244 ---------------------------------------------------------------------------------------------------- RETAILING -- 0.3% Internet Retail -- 0.3% 800,000 BBB-/Ba1 Expedia, Inc., 5.95%, 8/15/20 $ 778,000 3,000,000 BBB-/Ba1 Expedia, Inc., 8.5%, 7/1/16 (144A) 3,270,000 -------------- $ 4,048,000 -------------- Total Retailing $ 4,048,000 ---------------------------------------------------------------------------------------------------- FOOD & DRUG RETAILING -- 0.2% Drug Retail -- 0.2% 799,225 BBB+/Baa2 CVS Pass-Through Trust, 5.298%, 1/11/27 $ 799,465 1,540,191 BBB+/Baa2 CVS Pass-Through Trust, 5.773%, 1/10/33 1,594,668 -------------- $ 2,394,133 -------------- Total Food & Drug Retailing $ 2,394,133 ---------------------------------------------------------------------------------------------------- FOOD, BEVERAGE & TOBACCO -- 0.8% Agricultural Products -- 0.4% 5,175,000 BBB-/Ba1 Viterra, Inc., 5.95%, 8/1/20 $ 5,262,447 ---------------------------------------------------------------------------------------------------- Brewers -- 0.0% 55,000 BBB+/Baa1 Miller Brewing Co., 5.5%, 8/15/13 (144A) $ 59,575 ---------------------------------------------------------------------------------------------------- Packaged Foods & Meats -- 0.3% 3,725,000 BBB-/Baa2 Kraft Foods, Inc., 6.5%, 2/9/40 $ 4,137,633 ---------------------------------------------------------------------------------------------------- Tobacco -- 0.1% 1,535,000 BBB/WR UST Inc., 5.75%, 3/1/18 $ 1,652,323 ---------------------------------------------------------------------------------------------------- Total Food, Beverage & Tobacco $ 11,111,978 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/11 33 Schedule of Investments | 6/30/11 (continued) ----------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value ----------------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 0.1% Health Care Facilities -- 0.1% 1,050,000 BB/Ba2 HCA, Inc., 7.875%, 2/15/20 $ 1,139,250 385,000 BB/Ba2 HCA, Inc., 8.5%, 4/15/19 425,425 202,000 BB-/B2 HCA, Inc., 9.875%, 2/15/17 224,725 -------------- $ 1,789,400 -------------- Total Health Care Equipment & Services $ 1,789,400 ----------------------------------------------------------------------------------------------------- PHARMACEUTICALS & BIOTECHNOLOGY -- 0.8% Biotechnology -- 0.3% 3,555,000 BBB+/Baa3 Biogen Idec, Inc., 6.0%, 3/1/13 $ 3,803,303 ----------------------------------------------------------------------------------------------------- Life Sciences Tools & Services -- 0.4% 5,366,000 BBB-/Baa2 Agilent Technologies Inc., 6.5%, 11/1/17 $ 6,180,280 ----------------------------------------------------------------------------------------------------- Pharmaceuticals -- 0.1% 1,000,000 AA/A1 Abbott Laboratories, Inc., 5.125%, 4/1/19 $ 1,100,135 -------------- Total Pharmaceuticals & Biotechnology $ 11,083,718 ----------------------------------------------------------------------------------------------------- BANKS -- 3.5% Diversified Banks -- 1.1% 3,515,000 A/Baa1 Barclays Plc, 6.05%, 12/4/17 $ 3,721,650 2,800,000 NR/A2 BBVA Bancomer SA, 6.5%, 3/10/21 (b) 2,856,000 3,230,000 BBB+/A3 Credit Agricole SA, 8.375%, 12/13/49 (b) 3,375,350 1,855,000 A/A1 Industrial Bank of Korea, 7.125%, 4/23/14 2,085,567 2,000,000 3.00 A-/NR Scotiabank Peru SA, Floating Rate Note, 3/15/17 (144A)* 1,985,600 -------------- $ 14,024,167 ----------------------------------------------------------------------------------------------------- Regional Banks -- 2.4% 3,335,000 BB/Baa3 Capital One Capital VI, 8.875%, 5/15/40 $ 3,439,746 1,190,000 A/NR Cobank, ACB, 7.875%, 4/16/18 (144A) 1,380,202 2,505,000 A+/Aa3 Mellon Funding Corp., 5.5%, 11/15/18 2,795,475 1,435,000 A/A3 PNC Bank NA, 6.0%, 12/7/17 1,611,763 6,273,000 8.25 BBB/Baa3 PNC Financial Services Group, Floating Rate Note, 5/29/49 (b) 6,635,197 1,500,000 8.70 BBB/Baa3 PNC Preferred Funding Trust III, Floating Rate Note, 3/29/49 1,581,675 4,080,000 A-/A3 Sovereign Bancorp, 8.75%, 5/30/18 4,605,745 6,670,000 BBB+/Baa1 State Street Capital, 8.25%, 3/15/42 (b) 6,672,935 3,520,000 AA-/Aa3 Wachovia Bank NA, 6.0%, 11/15/17 3,926,718 -------------- $ 32,649,456 -------------- Total Banks $ 46,673,623 ----------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 34 Pioneer Bond Fund | Annual Report | 6/30/11 -------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value -------------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 6.9% Asset Management & Custody Banks -- 0.8% 2,000,000 A+/Aa3 Bank of New York, 4.95%, 3/15/15 $ 2,193,456 3,945,000 A-/A3 Eaton Vance Corp., 6.5%, 10/2/17 4,555,331 4,050,000 BBB-/Baa3 Janus Capital Group, Inc., 6.95%, 6/15/17 4,439,837 -------------- $ 11,188,624 -------------------------------------------------------------------------------------------------------- Consumer Finance -- 0.9% 1,465,000 BBB/Baa1 Capital One Bank USA NA, 8.8%, 7/15/19 (b) $ 1,797,908 2,575,000 A/A2 Caterpillar Financial, 7.05%, 10/1/18 3,144,029 3,155,000 4.00 BBB-/Ba1 SLM Corp., Floating Rate Note, 7/25/14* 3,106,350 4,435,000 B/B3 Springleaf Finance Corp., 6.9%, 12/15/17 4,069,113 -------------- $ 12,117,400 -------------------------------------------------------------------------------------------------------- Diversified Financial Services -- 1.9% 3,800,000 BBB/Baa2 Alterra Finance LLC, 6.25%, 9/30/20 $ 3,906,628 625,000 0.00 BB+/NR Caelus Re II, Ltd., Floating Rate Note, 5/24/13 624,750 1,840,000 BBB+/Baa2 Hyundai Capital Services, Inc., 6.0%, 5/5/15 2,005,738 2,575,000 A+/Aa3 JPMorgan Chase & Co., 6.0%, 1/15/18 2,863,797 6,140,000 BBB+/Baa1 JPMorgan Chase & Co., 7.9%, 4/29/49 6,594,913 1,650,000 6.33 BB+/NR Lodestone Re, Ltd., Floating Rate Note, 5/17/13 (144A) 1,627,065 2,400,000 6.07 BB+/NR Lodestone Re, Ltd., Floating Rate Note, 1/08/14 2,343,120 600,000 9.72 BB-/NR Loma Reinsurance, Ltd., Floating Rate Note, 12/21/12 597,180 1,100,000 A-/A3 NationsBank Corp., 7.75%, 8/15/15 1,248,675 466,067 BBB/Baa2 Power Receivables Finance LLC, 6.29%, 1/1/12 (144A) 466,743 700,000 7.60 BB-/NR Queen Street II Capital, Ltd., Floating Rate Note, 4/9/14 691,740 1,250,000 0.66 BB/NR Residential Reinsurance 2010, Ltd., Floating Rate Note, 6/6/13 (144A)* 1,243,000 400,000 0.90 B+/NR Residential Reinsurance 2011, Ltd., Floating Rate Note, 6/6/15 397,960 -------------- $ 24,611,309 -------------------------------------------------------------------------------------------------------- Investment Banking & Brokerage -- 2.3% 674,088 BBB-/NR Alta Wind Holdings LLC, 7.0%, 6/30/35 (144A) $ 715,295 2,000,000 A/A1 Goldman Sachs, 5.5%, 11/15/14 2,162,516 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/11 35 Schedule of Investments | 6/30/11 (continued) ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- Investment Banking & Brokerage -- (continued) 11,040,000 5.79 BBB-/Baa2 Goldman Sachs Capital, Floating Rate Note, 12/29/49 $ 8,832,000 600,000 BBB/Baa2 Jefferies Group, Inc., 5.125%, 4/13/18 601,210 3,125,000 BBB/Baa2 Jefferies Group, Inc., 6.875%, 4/15/21 3,358,606 3,000,000 A-/A2 Macquarie Bank, Ltd., 6.625%, 4/7/21 3,018,204 2,730,000 A-/A2 Macquarie Group, Ltd., 6.0%, 1/14/20 2,737,524 3,325,000 A/A2 Merrill Lynch & Co., 5.45%, 2/5/13 3,527,133 3,125,000 A/A2 Morgan Stanley, 5.5%, 1/26/20 (b) 3,165,722 2,765,000 A/A2 Morgan Stanley Dean Witter, 6.625%, 4/1/18 3,045,905 -------------- $ 31,164,115 ------------------------------------------------------------------------------------------------------- Specialized Finance -- 1.0% 2,850,000 BBB/Baa1 Banque PSA Finance, 5.75%, 4/4/21 $ 2,884,052 2,900,000 BBB+/Baa1 BM&FBovespa SA, 5.5%, 7/16/20 3,002,950 5,205,000 BBB/Baa3 Cantor Fitzgerald LP, 7.875%, 10/15/19 (b) 5,685,250 2,000,000 A+/A1 National Rural Utilities Corp., 5.45%, 2/1/18 2,238,518 -------------- $ 13,810,770 -------------- Total Diversified Financials $ 92,892,218 ------------------------------------------------------------------------------------------------------- INSURANCE -- 4.4% Life & Health Insurance -- 1.7% 850,000 BBB/Baa3 Delphi Financial Group, Inc., 7.875%, 1/31/20 $ 945,980 3,380,000 BBB/Ba1 Lincoln National Corp., 6.05%, 4/20/67 3,253,250 1,690,000 A-/Baa2 Lincoln National Corp., 8.75%, 7/1/19 2,132,608 4,200,000 BBB/Baa2 MetLife, Inc., 10.75%, 8/1/39 (b) 5,911,500 4,250,000 A-/Baa2 Protective Life Corp., 7.375%, 10/15/19 4,831,970 2,800,000 A/Baa2 Prudential Financial, Inc., 5.15%, 1/15/13 2,954,605 2,140,000 BBB+/Baa3 Prudential Financial, Inc., 8.875%, 6/15/38 2,498,450 -------------- $ 22,528,363 ------------------------------------------------------------------------------------------------------- Multi-Line Insurance -- 1.1% 3,960,000 BBB/Baa3 Genworth Financial, Inc., 7.2%, 2/15/21 $ 3,962,827 4,620,000 BB/Baa3 Liberty Mutual Group, 7.0%, 3/15/37 (144A) 4,414,433 3,035,000 BBB-/Baa2 Liberty Mutual Group, 7.3%, 6/15/14 (144A) 3,303,980 85,000 10.75 BB/Baa3 Liberty Mutual Group, Floating Rate Note, 6/15/58 (144A) 112,838 2,650,000 A/A3 Loew Corp., 5.25%, 3/15/16 2,887,445 -------------- $ 14,681,523 ------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 36 Pioneer Bond Fund | Annual Report | 6/30/11 -------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value -------------------------------------------------------------------------------------------------------- Property & Casualty Insurance -- 0.9% 5,000,000 BBB-/Baa3 Hanover Insurance Group, 7.625%, 10/15/25 $ 5,210,400 700,000 BBB-/Baa3 The Hanover Insurance Group, Inc., 7.5%, 3/1/20 754,905 2,000,000 A-/A2 Travelers Companies, Inc., 6.25%, 6/15/37 2,139,776 1,750,000 BB/Ba2 White Mountains Re Group, Ltd., 7.506%, 5/29/49 (b) 1,669,658 3,275,000 BBB-/Ba1 XL Group Plc, 6.5%, 3/29/49 (b) 3,004,813 -------------- $ 12,779,552 -------------------------------------------------------------------------------------------------------- Reinsurance -- 0.7% 350,000 0.68 BB/NR East Lane Re III, Ltd., Floating Rate Note, 3/16/12 $ 354,025 550,000 7.23 BB+/NR Foundation Re III, Ltd., Floating Rate Note, 2/25/15 541,145 600,000 0.58 BB+/A2 Foundation Re III, Ltd., Floating Rate Note, 2/3/14 586,680 5,048,000 BBB+/BBB+ Platinum Underwriters HD, 7.5%, 6/1/17 5,433,061 950,000 BBB-/Baa3 Reinsurance Group of America, Inc., 6.75%, 12/15/65 907,582 1,150,000 9.42 B/NR Successor X, Ltd., Floating Rate Note, 2/25/14 1,120,215 -------------- $ 8,942,708 -------------- Total Insurance $ 58,932,146 -------------------------------------------------------------------------------------------------------- REAL ESTATE -- 3.2% Diversified Real Estate Activities -- 0.4% 4,125,000 A-/A2 WEA Finance LLC, 7.125%, 4/15/18 $ 4,814,345 -------------------------------------------------------------------------------------------------------- Diversified Real Estate Investments Trusts -- 0.8% 4,555,000 BBB+/Baa1 Dexus Finance Property, Ltd., 7.125%, 10/15/14 $ 5,138,168 1,765,000 BBB/Baa2 Digital Realty Trust LP, 4.5%, 7/15/15 1,836,973 725,000 BBB/Baa2 Digital Realty Trust LP, 5.875%, 2/1/20 760,097 3,455,000 BBB/Baa3 Goodman Funding Property, Ltd., 6.375%, 4/15/21 3,547,179 -------------- $ 11,282,417 -------------------------------------------------------------------------------------------------------- Office Real Estate Investment Trust -- 0.1% 1,607,000 BBB/Baa2 Mack-Cali Realty LP, 5.125%, 2/15/14 $ 1,722,656 -------------------------------------------------------------------------------------------------------- Real Estate Operating Companies -- 0.0% 180,000 B-/B3 Forest City Enterprises, 7.625%, 6/1/15 $ 176,400 -------------------------------------------------------------------------------------------------------- Retail Real Estate Investments Trusts -- 0.3% 2,905,000 BB+/Baa3 Developers Diversified Realty, 7.5%, 4/1/17 $ 3,289,727 -------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/11 37 Schedule of Investments | 6/30/11 (continued) ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Specialized Real Estate Investments Trusts -- 1.6% 4,125,000 BBB-/Baa2 Health Care REIT, Inc., 6.2%, 6/1/16 $ 4,580,033 860,000 BBB-/Baa2 Health Care, Inc., 6.0%, 11/15/13 932,711 2,425,000 BBB-/Baa3 Healthcare Realty Trust, Inc., 6.5%, 1/17/17 2,699,321 5,325,000 BBB-/Baa2 Hospitality Properties Trust, 7.875%, 8/15/14 6,008,176 4,285,000 BBB-/Baa3 Senior Housing Properties Trust, 6.75%, 4/15/20 4,574,379 540,000 BBB-/Baa3 Ventas Realty LP, 6.75%, 4/1/17 568,749 1,910,000 BBB-/Baa3 Ventas Realty LP, 6.5%, 6/1/16 1,973,036 -------------- $ 21,336,405 -------------- Total Real Estate $ 42,621,950 ---------------------------------------------------------------------------------------------------- SOFTWARE & SERVICES -- 0.3% Data Processing & Outsourced Services -- 0.0% 447,000 B-/Caa1 First Data Corp., 8.25%, 1/15/21 (b) $ 438,060 ---------------------------------------------------------------------------------------------------- Internet Software & Services -- 0.3% 3,950,000 NR/A2 GTP Towers Issuer LLC, 4.436%, 2/15/15 (144A) $ 4,042,164 -------------- Total Software & Services $ 4,480,224 ---------------------------------------------------------------------------------------------------- SEMICONDUCTORS -- 0.3% Semiconductor Equipment -- 0.3% 3,140,000 BBB/Baa1 Klac Instruments Corp., 6.9%, 5/1/18 $ 3,547,001 -------------- Total Semiconductors $ 3,547,001 ---------------------------------------------------------------------------------------------------- TELECOMMUNICATION SERVICES -- 1.1% Integrated Telecommunication Services -- 0.5% 1,200,000 A-/A2 AT&T, Inc., 5.6%, 5/15/18 $ 1,336,320 2,530,000 B/B2 Cincinnati Bell, Inc., 8.25%, 10/15/17 2,542,650 580,000 B/B2 Cincinnati Bell, Inc., 8.375%, 10/15/20 578,550 1,990,000 BB/Baa3 Embarq Corp., 7.082%, 6/1/16 2,212,124 -------------- $ 6,669,644 ---------------------------------------------------------------------------------------------------- Wireless Telecommunication Services -- 0.6% 3,015,000 NR/A2 Crown Castle Towers LLC, 4.883%, 8/15/20 $ 3,031,658 1,625,000 NR/A2 Crown Castle Towers LLC, 6.113%, 1/15/20 1,773,068 3,355,000 NR/NR GTP Acquisition Partners I LLC, 4.347%, 6/15/16 3,370,332 -------------- $ 8,175,058 -------------- Total Telecommunication Services $ 14,844,702 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 38 Pioneer Bond Fund | Annual Report | 6/30/11 ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- UTILITIES -- 2.9% Electric Utilities -- 1.4% 980,000 A-/Baa1 Commonwealth Edison, 6.15%, 9/15/17 $ 1,134,190 730,220 BBB-/Baa3 Crocket Cogeneration, 5.869%, 3/30/25 (144A) 735,346 3,365,000 A-/A2 Enel Finance International SA, 5.125%, 10/7/19 (144A) 3,402,419 1,167,768 BBB-/Baa3 FPL Energy America Wind LLC, 6.639%, 6/20/23 (144A) 1,209,422 357,000 B+/Ba2 FPL Energy Wind Funding, 6.876%, 6/27/17 (144A) 323,085 1,925,000 BB+/Baa2 Israel Electric Corp., Ltd., 7.25%, 1/15/19 (144A) (b) 2,113,841 610,000 BB+/Baa2 Israel Electric Corp., Ltd., 9.375%, 1/28/20 (144A) 753,728 910,000 BBB/Baa2 Nevada Power Co., 6.5%, 8/1/18 1,064,233 977,421 NR/WR Orcal Geothermal, 6.21%, 12/30/20 (144A) 942,673 2,690,000 BB+/Baa3 Public Service of New Mexico, 7.95%, 5/15/18 3,036,179 3,550,000 BBB+/A3 West Penn Power Co., 5.95%, 12/15/17 4,043,901 -------------- $ 18,759,017 ---------------------------------------------------------------------------------------------------- Gas Utilities -- 0.2% 2,402,127 A+/A1 Nakilat, Inc., 6.267%, 12/31/33 (144A) $ 2,231,864 ---------------------------------------------------------------------------------------------------- Independent Power Producers & Energy Traders -- 0.9% 4,159,444 NR/B2 Coso Geothermal Power Holdings, 7.0%, 7/15/26 (144A)* $ 3,457,538 2,675,000 BB-/Ba3 Intergen NV, 9.0%, 6/30/17 2,828,813 2,105,000 BBB-/Baa3 Kiowa Power Partners LLC, 5.737%, 3/20/21 (144A) 2,119,798 1,016,000 BB/Ba2 NSG Holdings, Inc., 7.75%, 12/15/25 995,680 2,534,283 BBB-/Baa3 Panoche Energy Center LLC, 6.88%, 7/31/29 (144A) 2,586,591 -------------- $ 11,988,420 ---------------------------------------------------------------------------------------------------- Multi-Utilities -- 0.4% 5,055,000 BBB+/Baa2 NY State Gas and Electric, 6.15%, 12/15/17 (144A) $ 5,601,046 386,087 NR/NR Ormat Funding Corp., 8.25%, 12/30/20 374,504 -------------- $ 5,975,550 -------------- Total Utilities $ 38,954,851 ---------------------------------------------------------------------------------------------------- TOTAL CORPORATE BONDS (Cost $424,545,757) $ 467,332,723 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/11 39 Schedule of Investments | 6/30/11 (continued) ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- FOREIGN GOVERNMENT BONDS -- 0.1% BANKS -- 0.1% 625,000 A/A1 Export-Import Bank of Korea, 5.875%, 1/14/15 $ 685,356 -------------- Total Banks $ 685,356 ---------------------------------------------------------------------------------------------------- TOTAL FOREIGN GOVERNMENT BONDS (Cost $622,553) $ 685,356 ---------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AGENCY OBLIGATIONS -- 20.4% 2,858,102 AAA/Aaa Federal Home Loan Mortgage Corp., 4.5%, 3/1/20-10/1/20 $ 3,052,079 7,397,655 AAA/Aaa Federal Home Loan Mortgage Corp., 5.0%, 10/1/20-6/1/35 7,961,178 4,896,276 AAA/Aaa Federal Home Loan Mortgage Corp., 5.5%, 12/1/18-11/1/35 5,325,100 11,725,509 AAA/Aaa Federal Home Loan Mortgage Corp., 6.0%, 5/1/17-12/1/36 12,966,532 766,549 AAA/Aaa Federal Home Loan Mortgage Corp., 6.5%, 3/1/13-4/1/34 871,194 796,009 AAA/Aaa Federal Home Loan Mortgage Corp., 7.0%, 8/1/22-11/1/30 874,749 3,274 AAA/Aaa Federal Home Loan Mortgage Corp., 8.0%, 8/1/31 3,710 7,700,000 NR/NR Federal National Mortgage Association REMICS, 5.0%, 3/25/24-7/25/33 8,297,859 175,389 AAA/Aaa Federal National Mortgage Association REMICS, 5.69%, 1/25/32 184,106 8,295 NR/NR Federal National Mortgage Association, 10.3%, 4/25/19 9,487 20,150,703 AAA/Aaa Federal National Mortgage Association, 4.0%, 7/1/18-1/25/41 20,159,472 20,196,178 AAA/Aaa Federal National Mortgage Association, 4.5%, 11/1/20-7/1/41 20,980,270 20,062,526 AAA/Aaa Federal National Mortgage Association, 5.0%, 12/1/17-8/1/40 21,451,528 13,746,967 AAA/Aaa Federal National Mortgage Association, 5.5%, 9/1/17-6/1/36 14,937,402 11,169,510 AAA/Aaa Federal National Mortgage Association, 6.0%, 6/1/16-7/1/38 12,355,834 1,256,805 AAA/Aaa Federal National Mortgage Association, 6.5%, 7/1/29-7/1/34 1,430,740 321,050 AAA/Aaa Federal National Mortgage Association, 7.0%, 3/1/12-1/1/32 371,593 3,963 AAA/Aaa Federal National Mortgage Association, 7.5%, 8/1/20-4/1/30 4,641 31,065 AAA/Aaa Federal National Mortgage Association, 8.0%, 4/1/20-5/1/31 36,538 The accompanying notes are an integral part of these financial statements. 40 Pioneer Bond Fund | Annual Report | 6/30/11 ----------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value ----------------------------------------------------------------------------------------------------- U.S. Government Agency Obligations -- (continued) 235,938 AAA/Aaa Government National Mortgage Association I, 6.0%, 2/15/29 $ 264,852 70,313 AAA/Aaa Government National Mortgage Association I, 7.0%, 12/15/30-3/15/31 82,256 12,254 AAA/Aaa Government National Mortgage Association I, 7.5%, 10/15/29 14,403 1,597,307 AAA/Aaa Government National Mortgage Association II, 4.5%, 12/20/34-1/20/35 1,694,559 2,583,085 AAA/Aaa Government National Mortgage Association II, 5.5%, 10/20/19-11/20/34 2,824,132 79,928 AAA/Aaa Government National Mortgage Association II, 6.5%, 2/20/29-4/20/29 90,547 357,198 AAA/Aaa Government National Mortgage Association II, 7.0%, 11/20/28-12/20/30 416,101 7,079,368 AAA/Aaa Government National Mortgage Association, 4.5%, 7/15/33-4/15/38 7,521,064 2,914,234 AAA/Aaa Government National Mortgage Association, 5.0%, 10/15/18-4/15/35 3,168,681 15,098,484 AAA/Aaa Government National Mortgage Association, 5.5%, 10/15/17-2/15/37 16,601,558 14,237,640 AAA/Aaa Government National Mortgage Association, 6.0%, 8/15/13-10/15/36 15,897,067 6,265,487 AAA/Aaa Government National Mortgage Association, 6.5%, 8/15/11-7/15/35 7,149,679 937,915 AAA/Aaa Government National Mortgage Association, 7.0%, 12/15/13-5/15/32 1,096,052 143,866 AAA/Aaa Government National Mortgage Association, 7.5%, 2/15/26-12/15/31 169,526 9,560 AAA/Aaa Government National Mortgage Association, 7.75%, 2/15/30 11,290 82,556,912 0.70 NR/NR Government National Mortgage Association, Floating Rate Note, 11/16/51 3,814,715 8,750,000 NR/Aaa U.S. Treasury Bonds, 2.75%, 2/15/19 (b) 8,834,063 6,380,000 NR/Aaa U.S. Treasury Bonds, 3.125%, 5/15/19 6,587,350 2,500,000 AAA/Aaa U.S. Treasury Bonds, 3.625%, 8/15/19 (b) 2,663,673 7,620,000 NR/Aaa U.S. Treasury Bonds, 4.25%, 5/15/39 7,474,748 1,365,000 NR/Aaa U.S. Treasury Bonds, 4.375%, 11/15/39 (b) 1,365,640 5,450,000 NR/Aaa U.S. Treasury Bonds, 4.375%, 2/15/38 5,485,763 8,435,000 NR/Aaa U.S. Treasury Bonds, 4.5%, 5/15/38 (b) 8,659,050 9,068,000 NR/Aaa U.S. Treasury Bonds, 4.5%, 8/15/39 (b) 9,272,030 4,000,000 NR/Aaa U.S. Treasury Bonds, 4.625%, 2/15/40 4,170,624 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/11 41 Schedule of Investments | 6/30/11 (continued) ------------------------------------------------------------------------------------------------------ Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------ U.S. Government Agency Obligations -- (continued) 5,100,000 NR/Aaa U.S. Treasury Bonds, 5.25%, 11/15/28 $ 5,885,716 4,750,000 NR/Aaa U.S. Treasury Bonds, 6.25%, 8/15/23 6,025,822 2,000,000 NR/Aaa U.S. Treasury Notes, 4.375%, 5/15/40 1,998,760 7,340,000 NR/Aaa U.S. Treasury Notes, 4.5%, 2/15/36 7,585,435 4,000,000 NR/Aaa U.S. Treasury Notes, 5.375%, 2/15/31 4,688,124 840,000 NR/Aaa U.S. Treasury Notes, 5.5%, 8/15/28 997,106 450,000 NR/Aaa U.S. Treasury Notes, 7.875%, 2/15/21 631,160 -------------- $ 274,415,558 ------------------------------------------------------------------------------------------------------ TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $261,189,842) $ 274,415,558 ------------------------------------------------------------------------------------------------------ MUNICIPAL BONDS -- 5.3% Municipal Airport -- 0.1% 1,000,000 BBB/Baa2 Indianapolis Airport Authority, 5.1%, 1/15/17 $ 1,094,710 ------------------------------------------------------------------------------------------------------ Municipal Development -- 0.9% 2,450,000 CCC+/NR Alliance Airport Authority/Texas, 5.75%, 12/1/29 $ 1,719,606 2,925,000 AA-/Aa3 California Statewide Communities Development Authority, 6.0%, 8/15/42 3,114,979 425,000 CCC+/Caa2 Dallas-Fort Worth Texas International Airport Revenue, 6.375%, 5/1/35 313,897 2,350,000 BBB-/Ba2 Louisiana Local Government Environmental Facilities & Community, 6.5%, 11/1/35 2,432,297 2,310,000 BBB/Baa3 Selma Industrial Development Board, 5.8%, 5/1/34 2,316,122 2,560,000 BBB+/Baa2 St. John Baptist Parish Louisiana Revenue, 5.125%, 6/1/37 2,440,678 -------------- $ 12,337,579 ------------------------------------------------------------------------------------------------------ Municipal General -- 0.6% 1,325,000 BB-/B1 Illinois Finance Authority, 6.5%, 10/15/40 $ 1,360,788 2,750,000 A+/A1 New Jersey Transport Trust Fund Authority, 5.5%, 6/15/41 2,837,148 2,400,000 AAA/Aa1 New York City Transitional Finance Authority, 5.0%, 11/1/33 2,516,640 1,660,000 AA+/Aa1 State of Washington, 5.0%, 7/1/18 1,960,842 -------------- $ 8,675,418 ------------------------------------------------------------------------------------------------------ The accompanying notes are an integral part of these financial statements. 42 Pioneer Bond Fund | Annual Report | 6/30/11 --------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value --------------------------------------------------------------------------------------------------- Municipal Higher Education -- 2.7% 4,380,000 AA+/Aa2 California State University Revenue, 5.0%, 11/1/39 $ 4,263,229 2,500,000 AAA/Aaa Connecticut State Health & Educational Facility Authority, 5.0%, 7/1/40 2,600,250 4,600,000 AAA/Aaa Connecticut State Health & Educational, 5.0%, 7/1/42 4,724,798 1,500,000 AAA/Aaa Houston Higher Education Finance Corp., 5.0%, 5/15/40 1,554,300 1,200,000 AAA/Aaa Massachusetts Development Finance Agency, 5.0%, 10/15/40 1,260,888 6,500,000 AAA/Aaa Massachusetts Health & Educational Facilities Authority, 5.5%, 11/15/36 7,086,755 1,000,000 AAA/Aaa Massachusetts Health & Educational Facilities Authority, 6.0%, 7/1/36 1,120,450 1,425,000 AAA/Aaa Massachusetts Health & Educational Facilities Authority, 5.50%, 7/1/32 1,708,618 2,850,000 AAA/Aaa Missouri State Health & Educational Facilities, 5.0%, 11/15/39 2,974,659 1,100,000 AAA/Aaa New York State Dormitory Authority, 5.0%, 10/1/41 1,155,374 2,150,000 AA/Aa1 New York State Dormitory Authority, 5.0%, 7/1/35 2,241,784 3,700,000 AAA/Aaa New York State Dormitory Authority, 5.0%, 7/1/38 3,852,921 800,000 AAA/Aaa Texas A&M University, 5.0%, 7/1/30 876,128 -------------- $ 35,420,154 --------------------------------------------------------------------------------------------------- Municipal Medical -- 0.1% 325,000 AA-/A1 Massachusetts Development Finance Agency, 5.25%, 4/1/37 $ 328,185 550,000 AA-/A1 Massachusetts Development Finance Agency, 5.375%, 4/1/41 558,503 -------------- $ 886,688 --------------------------------------------------------------------------------------------------- Municipal Pollution -- 0.5% 3,965,000 BBB/NR Brazoria County Environmental, 5.95%, 5/15/33 $ 4,000,011 995,000 BBB+/Baa1 County of Sweetwater Wyoming, 5.6%, 12/1/35 971,797 980,000 BBB/Baa3 Courtland Industrial Development Board, 5.0%, 8/1/27 888,174 1,200,000 B/Caa2 Pennsylvania Economic Development Financing Authority, 6.0%, 6/1/31 1,032,396 -------------- $ 6,892,378 --------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/11 43 Schedule of Investments | 6/30/11 (continued) ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- Municipal Water -- 0.4% 2,100,000 AAA/Aa1 City of Charleston South Carolina, 5.0%, 1/1/41 $ 2,203,656 2,400,000 AAA/Aa1 City of Charleston, South Carolina, 5.0%, 1/1/35 2,537,592 800,000 AAA/Aa2 Hampton Roads Sanitation District, 5.0%, 4/1/38 824,424 -------------- $ 5,565,672 ------------------------------------------------------------------------------------------------------- TOTAL MUNICIPAL BONDS (Cost $67,648,754) $ 70,872,599 ------------------------------------------------------------------------------------------------------- SENIOR FLOATING RATE LOAN INTERESTS** -- 7.6% ENERGY -- 0.5% Integrated Oil & Gas -- 0.3% 3,785,794 4.50 BBB/Baa2 Glenn Pool Oil & Gas Trust, Term Loan, 6/1/16 $ 3,795,372 ------------------------------------------------------------------------------------------------------- Oil & Gas Equipment & Services -- 0.1% 1,302,386 8.50 B+/NR Hudson Products Holdings, Inc., Term Loan, 8/24/15 $ 1,247,035 ------------------------------------------------------------------------------------------------------- Oil & Gas Refining & Marketing -- 0.1% 1,500,000 4.25 NR/Ba2 Pilot Travel Centers LLC, Initial Tranche B Term Loan, 3/7/18 $ 1,507,031 -------------- Total Energy $ 6,549,438 ------------------------------------------------------------------------------------------------------- MATERIALS -- 0.7% Diversified Chemical -- 0.1% 200,361 3.30 BBB-/Ba1 Celanese US Holdings LLC, Dollar Term C Loan, 10/31/16 $ 201,418 748,964 7.50 NR/NR Ineos U.S. Finance Corp., Senior Credit Term Loan, 12/16/13 775,880 737,253 8.00 NR/NR Ineos U.S. Finance Corp., Senior Credit Term Loan, 12/16/14 763,748 -------------- $ 1,741,046 ------------------------------------------------------------------------------------------------------- Metal & Glass Containers -- 0.2% 500,112 4.50 BB/Ba2 BWAY Holding Co., Replacement Term B Loan, 2/9/18 $ 501,415 1,822,110 6.75 B+/B2 Graham Packaging Co., Term C Loan, 4/5/14 1,829,824 44,402 4.50 BB/Ba2 ICL Industrial Containers ULC, Replacement Term C Loan, 2/9/18 44,651 -------------- $ 2,375,890 ------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 44 Pioneer Bond Fund | Annual Report | 6/30/11 ------------------------------------------------------------------------------------------------------ Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------ Paper Packaging -- 0.2% 367,225 6.00 B+/B2 Graham Packaging Co., Term D Loan, 9/9/16 $ 368,499 2,271,754 3.04 BB/Ba2 Graphic Packaging International, Inc., Incremental Term Loan, 5/16/14 2,270,192 -------------- $ 2,638,691 ------------------------------------------------------------------------------------------------------ Precious Metals & Minerals -- 0.1% 1,348,500 5.25 NR/NR Fairmount Minerals, Ltd., Tranche B Term Loan, 3/1/17 $ 1,352,434 ------------------------------------------------------------------------------------------------------ Specialty Chemicals -- 0.1% 1,620,000 5.50 NR/NR Chemtura Corp., Facility Term Loan, 8/11/16 $ 1,629,450 262,553 2.77 BB-/Ba2 Huntsman International LLC, Extended Term B Loan, 4/19/17 256,481 -------------- $ 1,885,931 -------------- Total Materials $ 9,993,992 ------------------------------------------------------------------------------------------------------ CAPITAL GOODS -- 0.4% Aerospace & Defense -- 0.4% 987,521 5.28 NR/NR Dae Aviation Holding, Tranche B1 Term Loan, 7/31/14 $ 986,698 1,175,067 6.25 BB-/Ba3 DynCorp International, Term Loan, 7/7/16 1,183,733 948,848 5.28 NR/NR Standard Aero, Ltd., Tranche B2 Term Loan, 7/31/14 948,058 1,597,166 4.50 NR/Ba2 Tasc, Inc., New Tranche B Term Loan, 4/25/15 1,596,767 -------------- $ 4,715,256 -------------- Total Capital Goods $ 4,715,256 ------------------------------------------------------------------------------------------------------ COMMERCIAL SERVICES & SUPPLIES -- 0.2% Environmental & Facilities Services -- 0.2% 2,604,118 2.19 D/B2 Synagro Technologies, Inc., 1st Lien Term Loan, 4/2/14 $ 2,421,830 -------------- Total Commercial Services & Supplies $ 2,421,830 ------------------------------------------------------------------------------------------------------ TRANSPORTATION -- 0.1% Air Freight & Couriers -- 0.1% 843,532 5.27 NR/B1 CEVA Group Plc, U.S. Tranche B Term Loan, 8/31/16 $ 828,243 462,700 5.31 NR/NR CEVA Group Plc, Dollar Tranche B Term Loan, 8/31/16 454,313 351,403 5.27 NR/NR CEVA Group Plc, EGL Tranche B Term Loan, 8/31/16 344,960 -------------- $ 1,627,516 -------------- Total Transportation $ 1,627,516 ------------------------------------------------------------------------------------------------------ The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/11 45 Schedule of Investments | 6/30/11 (continued) ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- AUTOMOBILES & COMPONENTS -- 1.0% Auto Parts & Equipment -- 0.4% 1,043,798 2.94 B+/B2 Allison Transmission, Term Loan, 8/7/14 $ 1,025,124 1,689,145 3.68 BBB-/Baa3 Delphi Automotive LLP, Tranche B Term Loan, 3/31/17 1,698,287 545,574 2.13 NR/NR Federal Mogul Corp., Tranche C Term Loan, 12/28/15 517,516 1,069,324 2.13 NR/NR Federal Mogul Corp., Tranche B Term Loan, 12/29/14 1,014,331 785,351 4.25 NR/NR Pinafore LLC, Term B1 Loan, 9/21/16 786,400 -------------- $ 5,041,658 ------------------------------------------------------------------------------------------------------- Automobile Manufacturers -- 0.3% 3,915,000 6.00 NR/NR Chrysler Group LLC, Tranche B Term Loan, 4/28/17 $ 3,823,651 ------------------------------------------------------------------------------------------------------- Tires & Rubber -- 0.3% 4,190,000 1.94 BB/Ba1 Goodyear Tire & Rubber Co., 2nd Lien Term Loan, 4/30/14 $ 4,044,846 -------------- Total Automobiles & Components $ 12,910,155 ------------------------------------------------------------------------------------------------------- CONSUMER SERVICES -- 0.1% Restaurants -- 0.1% 1,059,675 4.50 BB+/Ba2 Burger King Holdings, Inc., Tranche B Term Loan, 10/30/16 $ 1,058,442 ------------------------------------------------------------------------------------------------------- Specialized Consumer Services -- 0.0% 329,911 7.00 NR/NR Wash Multifamily Laundry, Term Loan, 8/28/14 $ 330,324 -------------- Total Consumer Services $ 1,388,766 ------------------------------------------------------------------------------------------------------- MEDIA -- 1.0% Advertising -- 0.1% 1,103,661 5.00 BB/Ba3 Affinion Group Inc., Tranche B Term Loan, 10/9/16 $ 1,104,351 ------------------------------------------------------------------------------------------------------- Broadcasting -- 0.2% 2,884,687 4.44 B/Baa2 Univision Communications, Inc., Extended Term Loan, 3/29/17 $ 2,746,025 ------------------------------------------------------------------------------------------------------- Cable & Satellite -- 0.3% 4,077,852 3.50 NR/NR Charter Communications Operations, Term C Loan, 9/8/16 $ 4,070,192 617,684 2.69 CCC/B2 WideOpenWest LLC, 1st Lien Term Loan, 6/30/14 598,092 -------------- $ 4,668,284 ------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 46 Pioneer Bond Fund | Annual Report | 6/30/11 ------------------------------------------------------------------------------------------------------ Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------ Movies & Entertainment -- 0.2% 1,188,048 5.25 NR/NR Christie/AIX, Inc., Term Loan, 4/29/16 $ 1,181,365 1,678,750 4.50 B+/NR Live Nation Entertainment, Term B Loan, 10/20/16 1,680,314 -------------- $ 2,861,679 ------------------------------------------------------------------------------------------------------ Publishing -- 0.2% 2,382,030 4.75 NR/NR Interactive Data Corp., Term B Loan, 1/31/18 $ 2,387,055 -------------- Total Media $ 13,767,394 ------------------------------------------------------------------------------------------------------ RETAILING -- 0.1% Automotive Retail -- 0.1% 1,420,000 4.75 NR/NR Autotrader.com, Inc., Tranche B1 Term Loan, 12/15/16 $ 1,420,746 -------------- Total Retailing $ 1,420,746 ------------------------------------------------------------------------------------------------------ FOOD & DRUG RETAILING -- 0.0% Food Retail -- 0.0% 354,076 2.69 BB-/Ba3 Pinnacle Foods Group, Inc., Term Loan, 4/2/14 $ 351,838 -------------- Total Food & Drug Retailing $ 351,838 ------------------------------------------------------------------------------------------------------ HOUSEHOLD & PERSONAL PRODUCTS -- 0.1% Personal Products -- 0.1% 995,000 4.25 BB-/Ba1 NBTY, Inc., Term B1 Loan, 10/1/17 $ 995,829 -------------- Total Household & Personal Products $ 995,829 ------------------------------------------------------------------------------------------------------ HEALTH CARE EQUIPMENT & SERVICES -- 1.1% Health Care Facilities -- 0.6% 1,639,250 6.50 B+/B1 Ardent Medical Services, Term Loan, 9/15/15 $ 1,643,861 110,795 2.50 BB-/Ba3 CHS/Community Health Systems, Non- Extended Term Loan, 7/25/14 107,256 2,154,881 2.50 BB-/Ba3 CHS/Community Health Systems, Non- Extended Term Loan, 7/25/14 2,086,054 747,900 3.50 BB+/Ba2 HCA Holdings, Inc., Tranche B3 Term Loan, 5/31/18 737,565 1,793,613 3.50 BB+/Ba2 HCA, Inc., Tranche B2 Term Loan, 3/17/17 1,771,749 1,879,594 4.00 NR/NR Universal Health Services, Inc., Tranche B Term Loan, 11/30/16 1,886,903 -------------- $ 8,233,388 ------------------------------------------------------------------------------------------------------ Health Care Services -- 0.2% 2,757,896 2.44 NR/NR Catalent Pharma Solutions, Inc., Dollar Term Loan, 4/10/14 $ 2,644,133 398,000 4.50 BB/Ba1 DaVita, Inc., Tranche B Term Loan, 10/20/16 399,635 -------------- $ 3,043,768 ------------------------------------------------------------------------------------------------------ The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/11 47 Schedule of Investments | 6/30/11 (continued) ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Health Care Supplies -- 0.2% 2,225,770 3.48 BB-/B1 Bausch & Lomb, Inc., Parent Term Loan, 4/24/15 $ 2,215,197 541,787 3.44 BB-/B1 Bausch & Lomb, Inc., Delayed Draw Term Loan, 4/24/15 539,214 -------------- $ 2,754,411 ---------------------------------------------------------------------------------------------------- Health Care Technology -- 0.1% 469,068 4.50 NR/NR IMS Health, Inc., Dollar Tranche B Term Loan, 8/31/17 $ 470,240 -------------- Total Health Care Equipment & Services $ 14,501,807 ---------------------------------------------------------------------------------------------------- PHARMACEUTICALS & BIOTECHNOLOGY -- 0.2% Biotechnology -- 0.1% 1,030,000 6.00 NR/NR Grifols, Inc., U.S. Tranche B Term Loan, 6/4/16 $ 1,036,009 ---------------------------------------------------------------------------------------------------- Pharmaceuticals -- 0.1% 1,765,000 4.00 NR/NR Endo Pharmaceuticals Holdings, Term B Loan, 4/14/18 $ 1,773,641 -------------- Total Pharmaceuticals & Biotechnology $ 2,809,650 ---------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 0.1% Diversified Financial Services -- 0.1% 1,010,000 5.25 NR/NR WorldPay, Facility B2A Loan, 8/6/17 $ 1,011,052 ---------------------------------------------------------------------------------------------------- Specialized Finance -- 0.0% 874,744 3.75 BBB-/Ba2 MSCI, Inc., Term B1 Loan, 3/14/17 $ 880,576 -------------- Total Diversified Financials $ 1,891,628 ---------------------------------------------------------------------------------------------------- INSURANCE -- 0.1% Insurance Brokers -- 0.1% 327,085 2.75 B/NR HUB International Holdings, Delayed Draw Term Loan, 6/13/14 $ 318,636 1,455,086 2.75 B/NR HUB International Holdings, Initial Term Loan, 6/13/14 1,417,497 -------------- $ 1,736,133 -------------- Total Insurance $ 1,736,133 ---------------------------------------------------------------------------------------------------- SOFTWARE & SERVICES -- 0.4% Application Software -- 0.0% 384,000 1.94 B/Ba3 Nuance Communications, Inc., Incremental Term Loan, 3/29/13 $ 382,500 ---------------------------------------------------------------------------------------------------- Data Processing & Outsourced Services -- 0.1% 1,002,425 5.25 BBB-/Ba1 Fidelity National, Inc., Term B Loan, 7/18/16 $ 1,007,076 ---------------------------------------------------------------------------------------------------- Internet Software & Services -- 0.1% 995,778 6.75 NR/NR SAVVIS, Inc., Term Loan, 8/4/16 $ 1,002,749 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 48 Pioneer Bond Fund | Annual Report | 6/30/11 ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- IT Consulting & Other Services -- 0.2% 2,329,542 1.94 BB/Ba3 SunGard Data Systems, Inc., Tranche A U.S. Term Loan, 2/28/14 $ 2,276,156 ------------------------------------------------------------------------------------------------------- Systems Software -- 0.0% 260,000 3.75 BB-/Ba2 Reynolds & Reynolds Co., Tranche B Term Loan, 3/9/18 $ 260,366 -------------- Total Software & Services $ 4,928,847 ------------------------------------------------------------------------------------------------------- TECHNOLOGY HARDWARE & EQUIPMENT -- 0.4% Communications Equipment -- 0.1% 947,625 5.00 BB/Ba2 CommScope, Inc., Term Loan, 1/3/18 $ 952,150 ------------------------------------------------------------------------------------------------------- Electronic Components -- 0.3% 499,841 2.44 NR/Ba1 Flextronics Semiconductor, A1A Delayed Draw Term Loan, 10/1/14 $ 493,384 318,132 2.44 NR/Ba1 Flextronics Semiconductor, A2 Delayed Draw Term Loan, 10/1/14 314,023 371,154 2.44 NR/Ba1 Flextronics Semiconductor, A3 Delayed Draw Term Loan, 10/1/14 366,360 2,704,407 2.44 NR/Ba1 Flextronics Semiconductor, Closing Date Term Loan, 10/1/14 2,673,499 -------------- $ 3,847,266 -------------- Total Technology Hardware & Equipment $ 4,799,416 ------------------------------------------------------------------------------------------------------- SEMICONDUCTORS -- 0.5% Semiconductor Equipment -- 0.3% 3,800,000 4.25 B+/Ba3 Aeroflex, Inc., Tranche B Term Loan, 4/25/18 $ 3,792,852 ------------------------------------------------------------------------------------------------------- Semiconductors -- 0.2% 1,423,431 4.75 BB/Ba2 Intersil Corp., Term Loan, 4/27/16 $ 1,430,548 997,500 4.00 NR/NR Microsemi Corp., New Term Loan, 11/2/17 998,955 -------------- $ 2,429,503 -------------- Total Semiconductors $ 6,222,355 ------------------------------------------------------------------------------------------------------- TELECOMMUNICATION SERVICES -- 0.3% Integrated Telecommunication Services -- 0.2% 253,041 3.19 NR/NR Telesat Canada, Inc., U.S. Term II Loan, 10/31/14 $ 250,036 2,945,743 3.19 NR/NR Telesat Canada, Inc., U.S. Term I Loan, 10/31/14 2,910,762 -------------- $ 3,160,798 ------------------------------------------------------------------------------------------------------- Wireless Telecommunication Services -- 0.1% 1,180,000 3.29 B/B3 Intelsat Jackson Holdings, Ltd., Term Loan, 2/1/14 $ 1,139,438 -------------- Total Telecommunication Services $ 4,300,236 ------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/11 49 Schedule of Investments | 6/30/11 (continued) ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value ------------------------------------------------------------------------------------------------------- UTILITIES -- 0.3% Electric Utilities -- 0.2% 4,044,646 4.73 BBB-/Ba1 Texas Competitive Electric Holdings Co., Term Loan, 10/10/17 $ 3,162,770 ------------------------------------------------------------------------------------------------------- Independent Power Producers & Energy Traders -- 0.1% 1,370,000 0.00 BB+/Baa3 NRG Energy, Inc., Term Loan, 5/5/18 $ 1,371,927 -------------- Total Utilities $ 4,534,697 ------------------------------------------------------------------------------------------------------- TOTAL SENIOR FLOATING RATE LOAN INTERESTS (Cost $100,723,931) $ 101,867,529 ------------------------------------------------------------------------------------------------------- TEMPORARY CASH INVESTMENTS -- 11.3% Repurchase Agreements -- 6.8% 15,150,000 NR/Aaa BNP Paribas Securities, Inc., 0.05%, dated 6/30/11, repurchase price of $15,150,000 plus accrued interest on 7/1/11 collateralized by $15,453,033 Federal National Mortgage Association (Discount Notes), 0.0%, 12/27/11 $ 15,150,000 15,150,000 NR/Aaa BNP Paribas Securities, Inc., 0.01%, dated 6/30/11, repurchase price of $15,150,000 plus accrued interest on 7/1/11 collateralized by the following: $14,292,674 U.S. Treasury Bond, 6.0 - 7.625%, 2/15/25 - 2/15/26 $1,144,588 U.S. Treasury Strip, 1.875%, 7/15/13 15,150,000 15,150,000 NR/Aaa Deutsche Bank, 0.05%, dated 6/30/11, repurchase price of $15,150,000 plus accrued interest on 7/1/11 collateralized by $15,453,000 Federal National Mortgage Association, 6.5%, 1/1/39 15,150,000 15,150,000 NR/Aaa JPMorgan, Inc., 0.00%, dated 6/30/11, repurchase price of 15,150,000 plus accrued interest on 1/1/11 collateralized by $15,453,375 U.S. Treasury Notes 2.375%, 6/30/18 15,150,000 15,150,000 NR/Aaa SG Americas Securities LLC, 0.01%, dated 6/30/11, repurchase price of $15,150,000 plus accrued interest on 7/1/11 collateralized by $15,453,014 U.S. Treasury Strip 0.5%, 4/15/15 15,150,000 The accompanying notes are an integral part of these financial statements. 50 Pioneer Bond Fund | Annual Report | 6/30/11 ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value ---------------------------------------------------------------------------------------------------- Repurchase Agreements -- (continued) 15,150,000 NR/Aaa SG Americas Securities LLC, 0.07%, dated 6/30/11, repurchase price of $15,150,000 plus accrued interest on 7/1/11 collateralized by the following: $13,439,209 Federal National Mortgage Association (ARM), 4.0 - 6.5%, 10/1/19 - 10/1/40 $2,013,791 Freddie Mac Giant, 5.5%, 12/1/38 $ 15,150,000 -------------- Total Repurchase Agreements $ 90,900,000 -------------- (Cost $90,900,000) $ 90,900,000 ---------------------------------------------------------------------------------------------------- SECURITIES LENDING COLLATERAL -- 4.5% (c) Certificates of Deposit: 1,816,388 Bank of America NA, 0.19%, 9/2/11 $ 1,816,388 1,816,388 Bank of Montreal Chicago, 0.12%, 7/8/11 1,816,388 1,453,110 Bank of Nova Scotia, 0.30%, 6/11/12 1,453,110 363,278 Bank of Nova Scotia, 0.25%, 9/29/12 363,278 844,620 BBVA Group NY, 0.47%, 8/10/11 844,620 1,017,177 BBVA Group NY, 0.36%, 7/7/11 1,017,177 1,271,472 BBVA Group NY, 1.19%, 7/26/11 1,271,472 254,294 BNP Paribas Bank NY, 0.27%, 8/5/11 254,294 1,816,388 Canadian Imperial Bank of Commerce NY, 0.20%, 10/3/11 1,816,388 1,453,110 DnB NOR Bank ASA NY, 0.18%, 8/10/11 1,453,110 908,173 National Australia Bank NY, 0.29%, 10/19/11 908,173 1,998,349 RaboBank Netherland NV NY, 0.29%, 4/2/12 1,998,349 1,089,833 Royal Bank of Canada NY, 0.32%, 12/2/11 1,089,833 726,555 SOCGEN NY, 0.28%, 7/11/11 726,555 363,278 SOCGEN NY, 0.26%, 7/14/11 363,278 544,916 SOCGEN NY, 0.16%, 7/7/11 544,916 1,816,388 Westpac Banking Corp. NY, 0.32%, 12/6/11 1,816,388 -------------- $ 19,553,717 ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/11 51 Schedule of Investments | 6/30/11 (continued) ----------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount ($) (unaudited) (unaudited) Value ----------------------------------------------------------------------------------------------------- Commercial Paper: 726,555 American Honda Finance, 0.34%, 1/11/12 $ 726,555 1,089,529 Australia & New Zealand Banking Group, 0.34%, 9/6/11 1,089,529 665,183 Australia & New Zealand Banking Group, 0.87%, 8/4/11 665,183 272,412 BCSFUN, 0.22%, 7/29/11 272,412 1,816,063 CBAPP, 0.20%, 8/3/11 1,816,063 199,956 General Electric Capital Corp., 0.44%, 11/21/11 199,956 1,652,615 HSBC, 0.17%, 8/9/11 1,652,615 1,634,749 JPMorgan Chase & Co., 0.30%, 7/17/12 1,634,749 1,633,265 NESCAP, 0.25%, 12/20/11 1,633,265 1,452,925 NORDNA, 0.27%, 7/18/11 1,452,925 1,453,009 PARFIN, 0.25%, 7/11/11 1,453,009 908,194 Royal Bank of Canada NY, 0.30%, 6/29/12 908,194 908,096 SANCPU, 0.39%, 7/11/11 908,096 907,193 SANCPU, 0.73%, 9/1/11 907,193 1,089,262 Sanofi Aventis, 0.68%, 10/20/11 1,089,262 1,270,698 SEB, 0.30%, 9/12/11 1,270,698 726,280 SOCNAM, 0.22%, 9/1/11 726,280 1,816,388 Svenska Handelsbanken, 0.29%, 6/29/12 1,816,388 1,816,388 Toyota Motor Credit Corp., 0.32%, 9/8/11 1,816,388 771,965 UXTPP, 0.32%, 7/1/11 771,965 908,065 VARFUN, 0.32%, 8/4/11 908,065 210,668 VARFUN, 0.32%, 8/8/11 210,668 508,506 VARFUN, 0.32%, 8/9/11 508,506 726,729 Wachovia, 0.41%, 10/15/11 726,729 545,336 Wachovia, 0.40%, 3/1/12 545,336 363,476 Wells Fargo & Co., 0.36%, 1/24/12 363,476 ------------- $ 26,073,505 ----------------------------------------------------------------------------------------------------- Tri-party Repurchase Agreements: 184,291 Barclays Capital Plc, 0.01%, 7/1/11 $ 184,291 1,816,388 Deutsche Bank AG, 0.01%, 7/1/11 1,816,388 1,816,388 HSBC Bank USA NA, 0.01%, 7/1/11 1,816,388 5,449,164 RBS Securities, Inc., 0.02%, 7/1/11 5,449,164 ------------- $ 9,266,231 ----------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 52 Pioneer Bond Fund | Annual Report | 6/30/11 -------------------------------------------------------------------------------------------------- Floating S&P/Moody's Rate (d) Ratings Shares (unaudited) (unaudited) Value -------------------------------------------------------------------------------------------------- Money Market Mutual Funds: 2,906,221 Dreyfus Preferred Money Market Fund $ 2,906,221 2,906,221 Fidelity Prime Money Market Fund 2,906,221 -------------- $ 5,812,442 -------------------------------------------------------------------------------------------------- Total Securities Lending Collateral (Cost $60,705,895) $ 60,705,895 -------------------------------------------------------------------------------------------------- TOTAL TEMPORARY CASH INVESTMENTS (Cost $151,605,895) $ 151,605,895 -------------------------------------------------------------------------------------------------- TOTAL INVESTMENT IN SECURITIES -- 106.4% (Cost $1,373,955,563) (a) $1,427,346,039 -------------------------------------------------------------------------------------------------- OTHER ASSETS AND LIABILITIES -- (6.4)% $ (86,323,777) -------------------------------------------------------------------------------------------------- TOTAL NET ASSETS -- 100.0% $1,341,022,262 ================================================================================================== * Non-income producing security. NR Not rated by either S&P or Moody's. WR Withdrawn rating. (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, 2011, the value of these securities amounted to $64,047,946 or 4.8% 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, 2011, the net unrealized gain on investments based on cost for federal income tax purposes of $1,372,097,633 was as follows: Aggregate gross unrealized gain for all investments in which there is an excess of value over tax cost $77,642,505 Aggregate gross unrealized loss for all investments in which there is an excess of tax cost over value (22,394,099) ----------- Net unrealized gain $55,248,406 =========== The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/11 53 Schedule of Investments | 6/30/11 (continued) (b) At June 30, 2011, the following securities were out on loan: ----------------------------------------------------------------------------------------------- Principal Amount ($) Security Value ----------------------------------------------------------------------------------------------- 2,000,000 BBVA Bancomer SA, 6.5%, 3/10/21 $ 2,040,000 2,000,000 Canadian Natural Resources, 5.9%, 2/1/18 2,333,598 1,031,000 Cantor Fitzgerald LP, 7.875%, 10/15/19 1,143,045 557,000 Capital One Bank USA NA, 8.8%, 7/15/19 685,615 3,197,000 Credit Agricole SA, 8.375%, 12/13/49 3,398,133 440,000 First Data Corp., 8.25%, 1/15/21 450,661 10,000 Forest City Enterprises, Inc., 7.0%, 12/31/49 679,960 2,917,000 Intel Corp., 2.95%, 12/15/35 3,019,034 1,600,000 Israel Electric Corp., Ltd., 7.25%, 1/15/19 (144A) 1,810,126 4,000,000 Masco Corp., 7.125%, 3/15/20 4,177,684 310,000 MetLife, Inc., 10.75%, 8/1/39 450,118 1,204,000 Morgan Stanley, 5.5%, 1/26/20 1,248,016 1,500,000 PNC Financial Services Group, Floating Rate Note, 5/29/49 1,600,017 200,000 Ras Laffan Liquefied Natural Gas Co., Ltd. III, 5.832%, 9/30/16 (144A) 220,916 5,952,000 State Street Capital, 8.25%, 3/15/42 5,967,761 500,000 U.S. Treasury Bonds, 4.375%, 11/15/39 504,789 8,000,000 U.S. Treasury Bonds, 4.5%, 5/15/38 8,276,141 9,000,000 U.S. Treasury Bonds, 4.5%, 8/15/39 9,384,642 8,750,000 U.S. Treasury Bonds, 2.75%, 2/15/19 8,926,496 1,000,000 U.S. Treasury Bonds, 3.625%, 8/15/19 1,079,176 1,000,000 White Mountains Re Group, Ltd., 7.506%, 5/29/49 954,090 1,000,000 XL Group Plc, 6.5%, 3/29/49 931,042 ----------------------------------------------------------------------------------------------- Total $59,281,060 =============================================================================================== (c) Securities lending collateral is managed by Credit Suisse AG, New York Branch. (d) Debt obligation with a variable interest rate. Rate shown is rate at end of period. (e) Security is in default and is non-income producing. (g) Security is valued using fair value methods (other than prices supplied by independent pricing services.) (See Note 1A). Purchases and sales of securities (excluding temporary cash investments) for the six months ended June 30, 2011 were as follows: ---------------------------------------------------------------------------------------------- Purchases Sales ---------------------------------------------------------------------------------------------- Long-Term U.S. Government Securities $ 75,425,002 $ 79,421,504 Other Long-Term Securities $386,254,072 $363,532,780 The accompanying notes are an integral part of these financial statements. 54 Pioneer Bond Fund | Annual Report | 6/30/11 Various inputs are used in determining the value of the Fund's investments. These inputs are summarized in the three broad levels listed below. Highest priority is given to Level 1 inputs and lowest priority is given to Level 3. 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) The following is a summary of the inputs used as of June 30, 2011, in valuing the Fund's assets: ------------------------------------------------------------------------------------------------ Level 1 Level 2 Level 3 Total ------------------------------------------------------------------------------------------------ Convertible Corporate Bonds $ -- $ 8,461,107 $ -- $ 8,461,107 Preferred Stocks 12,937,451 10,226,598 -- 23,164,049 Asset Backed Securities -- 108,905,135 -- 108,905,135 Collateralized Mortgage Obligations -- 219,803,246 232,842 220,036,088 Corporate Bonds -- 467,332,723 -- 467,332,723 U.S. Government Agency Obligations -- 274,415,558 -- 274,415,558 Foreign Government Bonds -- 685,356 -- 685,356 Municipal Bonds -- 70,872,599 -- 70,872,599 Senior Floating Rate Loan Interests -- 101,867,529 -- 101,867,529 Temporary Cash Investments -- 145,793,453 -- 145,793,453 Money Market Mutual Funds 5,812,442 -- -- 5,812,442 ------------------------------------------------------------------------------------------------ Total $18,749,893 1,408,363,304 232,842 1,427,346,039 ================================================================================================ Other Financial Instruments* $ 22,081 $ -- $ -- $ 22,081 ================================================================================================ * Other financial instruments include futures contracts. Following is a reconciliation of assets using significant unobservable inputs (Level 3): ------------------------------------------------------------------------------------------------ Collateralized Mortgage Obligations ------------------------------------------------------------------------------------------------ Balance as of 6/30/10 $232,963 Realized gain (loss)(1) -- Change in unrealized appreciation (depreciation)(2) (121) Net purchases (sales) -- Transfers in and out of Level (3) -- ------------------------------------------------------------------------------------------------ Balance as of 6/30/11 $232,842 ================================================================================================ (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. The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/11 55 Statement of Assets and Liabilities | 6/30/11 ASSETS: Investment in securities (including securities loaned of $59,281,060) (cost $1,373,955,563) $1,427,346,039 Cash 6,063,594 Futures Collateral 300,850 Receivables -- Investment securities sold 4,419,928 Fund shares sold 4,912,387 Variation margin 30,780 Interest 11,113,742 Due from Pioneer Investment Management, Inc. 202,131 Other 99,979 ------------------------------------------------------------------------------------------ Total assets $1,454,489,430 ------------------------------------------------------------------------------------------ LIABILITIES: Payables -- Investment securities purchased $ 45,060,004 Fund shares repurchased 5,262,611 Dividends 2,077,073 Upon return of securities loaned 60,705,895 Due to affiliates 216,411 Accrued expenses 145,174 ------------------------------------------------------------------------------------------ Total liabilities $ 113,467,168 ------------------------------------------------------------------------------------------ NET ASSETS: Paid-in capital $1,298,249,406 Undistributed net investment income 575,991 Accumulated net realized loss on investments and futures contracts (11,215,692) Net unrealized gain on investments 53,390,476 Net unrealized gain on futures contracts 22,081 ------------------------------------------------------------------------------------------ Total net assets $1,341,022,262 ========================================================================================== NET ASSET VALUE PER SHARE: (No par value, unlimited number of shares authorized) Class A (based on $500,905,197/51,868,543 shares) $ 9.66 Class B (based on $18,474,043/1,924,246 shares) $ 9.60 Class C (based on $82,914,671/8,677,908 shares) $ 9.55 Class R (based on $20,507,973/2,105,155 shares) $ 9.74 Class Y (based on $717,432,974/74,933,361 shares) $ 9.57 Class Z (based on $787,404/81,357 shares) $ 9.68 MAXIMUM OFFERING PRICE: Class A ($9.66 [divided by] 95.5%) $ 10.12 ========================================================================================== The accompanying notes are an integral part of these financial statements. 56 Pioneer Bond Fund | Annual Report | 6/30/11 Statement of Operations For the Year Ended 6/30/11 INVESTMENT INCOME: Interest $67,679,040 Dividends 1,263,644 Income from securities loaned, net 34,807 ----------------------------------------------------------------------------------------- Total investment income $68,977,491 ----------------------------------------------------------------------------------------- EXPENSES: Management fees $ 6,157,340 Transfer agent fees Class A 366,037 Class B 73,588 Class C 61,146 Class R 5,307 Class Y 102,137 Class Z 624 Distribution fees Class A 1,052,255 Class B 232,812 Class C 834,300 Class R 100,373 Shareholder communications expense 1,107,124 Administrative reimbursements 388,302 Custodian fees 44,536 Registration fees 97,674 Professional fees 100,182 Printing expense 69,426 Fees and expenses of nonaffiliated trustees 38,771 Miscellaneous 143,866 ----------------------------------------------------------------------------------------- Total expenses $10,975,800 Less fees waived and expenses reimbursed by Pioneer Investment Management, Inc. (914,894) ----------------------------------------------------------------------------------------- Net expenses $10,060,906 ----------------------------------------------------------------------------------------- Net investment income $58,916,585 ----------------------------------------------------------------------------------------- REALIZED AND UNREALIZED GAIN ON INVESTMENTS AND FUTURES CONTRACTS: Net realized gain on: Investments $18,402,308 Class action 261,076 Futures contracts 1,314,669 $19,978,053 ----------------------------------------------------------------------------------------- Change in net unrealized gain on: Investments $ 6,474,757 Futures contracts 22,081 $ 6,496,838 ----------------------------------------------------------------------------------------- Net gain on investments and futures contracts $26,474,891 ----------------------------------------------------------------------------------------- Net increase in net assets resulting from operations $85,391,476 ========================================================================================= The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/11 57 Statement of Changes in Net Assets For the Years Ended 6/30/11 and 6/30/10, respectively -------------------------------------------------------------------------------------------------------- Year Ended Year Ended 6/30/11 6/30/10 -------------------------------------------------------------------------------------------------------- FROM OPERATIONS: Net investment income $ 58,916,585 $ 57,136,766 Net realized gain on investments, class action and futures contracts 19,978,053 5,747,467 Change in net unrealized gain on investments and futures contracts 6,496,838 93,558,179 -------------------------------------------------------------------------------------------------------- Net increase in net assets resulting from operations $ 85,391,476 $ 156,442,412 -------------------------------------------------------------------------------------------------------- DISTRIBUTIONS TO SHAREOWNERS: Net investment income: Class A ($0.44 and $0.44 per share, respectively) $ (19,115,565) $ (16,791,891) Class B ($0.34 and $0.34 per share, respectively) (814,135) (1,152,065) Class C ($0.35 and $0.35 per share, respectively) (3,061,924) (2,598,981) Class R ($0.41 and $0.41 per share, respectively) (841,089) (773,008) Class Y ($0.46 and $0.45 per share, respectively) (33,941,983) (34,242,342) Class Z ($0.46 and $0.46 per share, respectively) (34,116) (27,059) -------------------------------------------------------------------------------------------------------- Total distributions to shareowners $ (57,808,812) $ (55,585,346) -------------------------------------------------------------------------------------------------------- FROM FUND SHARE TRANSACTIONS: Net proceeds from sale of shares $ 502,805,760 $ 512,301,758 Reinvestment of distributions 31,046,676 24,975,542 Cost of shares repurchased (483,127,000) (385,687,490) -------------------------------------------------------------------------------------------------------- Net increase in net assets resulting from Fund share transactions $ 50,725,436 $ 151,589,810 -------------------------------------------------------------------------------------------------------- Net increase in net assets $ 78,308,100 $ 252,446,876 NET ASSETS: Beginning of year 1,262,714,162 1,010,267,286 -------------------------------------------------------------------------------------------------------- End of year $1,341,022,262 $1,262,714,162 ======================================================================================================== Undistributed (distributions in excess of) net investment income $ 575,991 $ (236,147) ======================================================================================================== The accompanying notes are an integral part of these financial statements. 58 Pioneer Bond Fund | Annual Report | 6/30/11 -------------------------------------------------------------------------------------------------- '11 Shares '11 Amount '10 Shares '10 Amount -------------------------------------------------------------------------------------------------- Class A Shares sold 27,278,290 $263,115,680 21,985,150 $203,489,130 Reinvestment of distributions 1,589,792 15,316,927 1,317,083 12,121,485 Less shares repurchased (21,554,132) (207,161,586) (15,830,311) (145,512,861) -------------------------------------------------------------------------------------------------- Net increase 7,313,950 $ 71,271,021 7,471,922 $ 70,097,754 ================================================================================================== Class B Shares sold 222,239 $ 2,121,453 726,217 $ 6,600,255 Reinvestment of distributions 77,652 743,038 99,213 904,650 Less shares repurchased (1,289,045) (12,303,562) (1,612,539) (14,702,859) -------------------------------------------------------------------------------------------------- Net decrease (989,154) $ (9,439,071) (787,109) $ (7,197,954) ================================================================================================== Class C Shares sold 2,737,693 $ 26,073,411 4,303,908 $ 39,005,155 Reinvestment of distributions 213,686 2,036,474 180,063 1,639,251 Less shares repurchased (3,040,932) (28,890,255) (1,928,805) (17,523,873) -------------------------------------------------------------------------------------------------- Net increase (decrease) (89,553) $ (780,370) 2,555,166 $ 23,120,533 ================================================================================================== Class R Shares sold 1,314,257 $ 12,751,688 904,665 $ 8,267,967 Reinvestment of distributions 63,853 620,735 57,659 534,364 Less shares repurchased (1,182,197) (11,480,126) (821,575) (7,571,493) -------------------------------------------------------------------------------------------------- Net increase 195,913 $ 1,892,297 140,749 $ 1,230,838 ================================================================================================== Class Y Shares sold 20,798,206 $198,381,546 28,285,000 $254,508,292 Reinvestment of distributions 1,288,384 12,308,045 1,070,227 9,769,546 Less shares repurchased (23,425,218) (222,959,013) (22,010,808) (200,233,538) -------------------------------------------------------------------------------------------------- Net increase (decrease) (1,338,628) $(12,269,422) 7,344,419 $ 64,044,300 ================================================================================================== Class Z Shares sold 37,285 $ 361,982 46,777 $ 430,959 Reinvestment of distributions 2,220 21,457 673 6,246 Less shares repurchased (34,264) (332,458) (15,424) (142,866) -------------------------------------------------------------------------------------------------- Net increase 5,241 $ 50,981 32,026 $ 294,339 ================================================================================================== The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/11 59 Financial Highlights ---------------------------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 6/30/11 6/30/10 6/30/09 6/30/08 6/30/07 ---------------------------------------------------------------------------------------------------------------------------------- Class A Net asset value, beginning of period $ 9.44 $ 8.63 $ 9.10 $ 8.95 $ 8.89 ---------------------------------------------------------------------------------------------------------------------------------- Increase from investment operations: Net investment income $ 0.45 $ 0.45 $ 0.50 $ 0.43 $ 0.40 Net realized and unrealized gain (loss) on investments 0.21 0.80 (0.31) 0.16 0.07 ---------------------------------------------------------------------------------------------------------------------------------- Net increase from investment operations $ 0.66 $ 1.25 $ 0.19 $ 0.59 $ 0.47 Distributions to shareowners: Net investment income (0.44) (0.44) (0.55) (0.44) (0.41) Net realized gain -- -- (0.11) -- -- ---------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 0.22 $ 0.81 $ (0.47) $ 0.15 $ 0.06 ---------------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.66 $ 9.44 $ 8.63 $ 9.10 $ 8.95 ================================================================================================================================== Total return* 7.08% 14.71% 2.65% 6.64% 5.31% Ratio of net expenses to average net assets+ 0.85% 0.85% 0.89%(a) 1.00% 1.00% Ratio of net investment income to average net assets+ 4.63% 4.86% 5.88% 4.60% 4.48% Portfolio turnover rate 36% 41% 34% 73% 31% Net assets, end of period (in thousands) $500,905 $420,706 $320,036 $265,959 $284,592 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Net expenses 1.06% 1.07% 1.09% 1.04% 1.00% Net investment income 4.42% 4.64% 5.68% 4.56% 4.48% Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 0.85% 0.85% 0.89%(a) 1.00% 1.00% Net investment income 4.63% 4.86% 5.88% 4.60% 4.48% ================================================================================================================================== * 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. 60 Pioneer Bond Fund | Annual Report | 6/30/11 ------------------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 6/30/11 6/30/10 6/30/09 6/30/08 6/30/07 ------------------------------------------------------------------------------------------------------------------------- Class B Net asset value, beginning of period $ 9.38 $ 8.58 $ 9.05 $ 8.90 $ 8.85 ------------------------------------------------------------------------------------------------------------------------- Increase from investment operations: Net investment income $ 0.35 $ 0.35 $ 0.42 $ 0.34 $ 0.33 Net realized and unrealized gain (loss) on investments 0.21 0.79 (0.31) 0.16 0.05 ------------------------------------------------------------------------------------------------------------------------- Net increase from investment operations $ 0.56 $ 1.14 $ 0.11 $ 0.50 $ 0.38 Distributions to shareowners: Net investment income (0.34) (0.34) (0.47) (0.35) (0.33) Net realized gain -- -- (0.11) -- -- ------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 0.22 $ 0.80 $ (0.47) $ 0.15 $ 0.05 ------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.60 $ 9.38 $ 8.58 $ 9.05 $ 8.90 ========================================================================================================================= Total return* 5.99% 13.47% 1.62% 5.70% 4.26% Ratio of net expenses to average net assets+ 1.90% 1.90% 1.90% 1.90% 1.92% Ratio of net investment income to average net assets+ 3.59% 3.89% 4.90% 3.72% 3.55% Portfolio turnover rate 36% 41% 34% 73% 31% Net assets, end of period (in thousands) $18,474 $27,342 $31,738 $34,106 $36,366 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Net expenses 1.95% 1.98% 1.99% 1.90% 2.02% Net investment income 3.54% 3.81% 4.81% 3.72% 3.45% 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% 1.89% 1.90% Net investment income 3.59% 3.89% 4.90% 3.73% 3.57% ========================================================================================================================= * 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 | 6/30/11 61 Financial Highlights (continued) -------------------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 6/30/11 6/30/10 6/30/09 6/30/08 6/30/07 -------------------------------------------------------------------------------------------------------------------------- Class C Net asset value, beginning of period $ 9.34 $ 8.54 $ 9.02 $ 8.87 $ 8.81 -------------------------------------------------------------------------------------------------------------------------- Increase from investment operations: Net investment income $ 0.36 $ 0.37 $ 0.42 $ 0.35 $ 0.33 Net realized and unrealized gain (loss) on investments 0.20 0.78 (0.31) 0.16 0.06 -------------------------------------------------------------------------------------------------------------------------- Net increase from investment operations $ 0.56 $ 1.15 $ 0.11 $ 0.51 $ 0.39 Distributions to shareowners: Net investment income (0.35) (0.35) (0.48) (0.36) (0.33) Net realized gain -- -- (0.11) -- -- -------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 0.21 $ 0.80 $ (0.48) $ 0.15 $ 0.06 -------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.55 $ 9.34 $ 8.54 $ 9.02 $ 8.87 ========================================================================================================================== Total return* 6.06% 13.63% 1.62% 5.80% 4.39% Ratio of net expenses to average net assets+ 1.73% 1.79% 1.83% 1.82% 1.85% Ratio of net investment income to average net assets+ 3.75% 3.91% 4.93% 3.79% 3.62% Portfolio turnover rate 36% 41% 34% 73% 31% Net assets, end of period (in thousands) $82,915 $81,892 $53,045 $35,784 $30,934 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Net expenses 1.73% 1.79% 1.83% 1.82% 1.85% Net investment income 3.75% 3.91% 4.93% 3.79% 3.62% Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 1.73% 1.79% 1.83% 1.82% 1.84% Net investment income 3.75% 3.91% 4.93% 3.79% 3.63% ========================================================================================================================== * 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. 62 Pioneer Bond Fund | Annual Report | 6/30/11 ------------------------------------------------------------------------------------------------------------------------ Year Year Year Year Year Ended Ended Ended Ended Ended 6/30/11 6/30/10 6/30/09 6/30/08 6/30/07 ------------------------------------------------------------------------------------------------------------------------ Class R Net asset value, beginning of period $ 9.52 $ 8.71 $ 9.18 $ 9.05 $ 8.99 ------------------------------------------------------------------------------------------------------------------------ Increase from investment operations: Net investment income $ 0.41 $ 0.42 $ 0.48 $ 0.40 $ 0.39 Net realized and unrealized gain (loss) on investments 0.22 0.80 (0.31) 0.15 0.06 ------------------------------------------------------------------------------------------------------------------------ Net increase from investment operations $ 0.63 $ 1.22 $ 0.17 $ 0.55 $ 0.45 Distributions to shareowners: Net investment income (0.41) (0.41) (0.53) (0.42) (0.39) Net realized gain -- -- (0.11) -- -- ------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $ 0.22 $ 0.81 $ (0.47) $ 0.13 $ 0.06 ------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 9.74 $ 9.52 $ 8.71 $ 9.18 $ 9.05 ======================================================================================================================== Total return* 6.67% 14.18% 2.35% 6.15% 5.04% Ratio of net expenses to average net assets+ 1.24% 1.25% 1.25% 1.25% 1.25% Ratio of net investment income to average net assets+ 4.25% 4.50% 5.53% 4.35% 4.24% Portfolio turnover rate 36% 41% 34% 73% 31% Net assets, end of period (in thousands) $20,508 $18,186 $15,404 $11,263 $6,511 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Net expenses 1.24% 1.26% 1.30% 1.31% 1.44% Net investment income 4.25% 4.49% 5.48% 4.30% 4.05% Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 1.24% 1.25% 1.25% 1.25% 1.25% Net investment income 4.25% 4.50% 5.53% 4.35% 4.24% ======================================================================================================================== * 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 | 6/30/11 63 Financial Highlights (continued) ------------------------------------------------------------------------------------------------------------------------------- Year Year Year Year Year Ended Ended Ended Ended Ended 6/30/11 6/30/10 6/30/09 6/30/08 6/30/07 ------------------------------------------------------------------------------------------------------------------------------- Class Y Net asset value, beginning of period $ 9.36 $ 8.55 $ 9.02 $ 8.88 $ 8.83 ------------------------------------------------------------------------------------------------------------------------------- Increase from investment operations: Net investment income $ 0.47 $ 0.47 $ 0.53 $ 0.45 $ 0.44 Net realized and unrealized gain (loss) on investments 0.20 0.79 (0.31) 0.16 0.06 ------------------------------------------------------------------------------------------------------------------------------- Net increase from investment operations $ 0.67 $ 1.26 $ 0.22 $ 0.61 $ 0.50 Distributions to shareowners: Net investment income (0.46) (0.45) (0.58) (0.47) (0.45) Net realized gain -- -- (0.11) -- -- ------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 0.21 $ 0.81 $ (0.47) $ 0.14 $ 0.05 ------------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.57 $ 9.36 $ 8.55 $ 9.02 $ 8.88 =============================================================================================================================== Total return* 7.25% 15.06% 2.95% 6.91% 5.65% Ratio of net expenses to average net assets+ 0.61% 0.61% 0.63% 0.59% 0.57% Ratio of net investment income to average net assets+ 4.88% 5.13% 6.10% 5.02% 4.89% Portfolio turnover rate 36% 41% 34% 73% 31% Net assets, end of period (in thousands) $717,433 $713,869 $589,661 $710,219 $613,523 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Net expenses 0.61% 0.61% 0.64% 0.61% 0.57% Net investment income 4.88% 5.13% 6.09% 5.00% 4.89% Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 0.61% 0.61% 0.63% 0.59% 0.57% Net investment income 4.88% 5.13% 6.10% 5.02% 4.89% =============================================================================================================================== * 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. 64 Pioneer Bond Fund | Annual Report | 6/30/11 ---------------------------------------------------------------------------------------------------------------------------------- Year Year Year Ended Ended Ended 7/6/07 (a) 6/30/11 6/30/10 6/30/09 to 6/30/08 ---------------------------------------------------------------------------------------------------------------------------------- Class Z Net asset value, beginning of period $9.46 $ 8.67 $ 9.10 $ 8.89 ---------------------------------------------------------------------------------------------------------------------------------- Increase from investment operations: Net investment income $0.47 $ 0.48 $ 0.54 $ 0.45 Net realized and unrealized gain (loss) on investments 0.21 0.77 (0.28) 0.22 ---------------------------------------------------------------------------------------------------------------------------------- Net increase from investment operations $0.68 $ 1.25 $ 0.26 $ 0.67 Distributions to shareowners: Net investment income 0.46) (0.46) (0.58) (0.46) Net realized gain -- -- (0.11) -- ---------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $0.22 $ 0.79 $(0.43) $ 0.21 ---------------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $9.68 $ 9.46 $ 8.67 $ 9.10 ================================================================================================================================== Total return* 7.30% 14.68% 3.42% 7.63%(b) Ratio of net expenses to average net assets+ 0.65% 0.63% 0.65% 0.58%** Ratio of net investment income to average net assets+ 4.82% 5.00% 5.91% 5.00%** Portfolio turnover rate 36% 41% 34% 73% Net assets, end of period (in thousands) $ 787 $ 720 $ 382 $ 102 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Net expenses 0.72% 0.63% 0.67% 0.58%** Net investment income 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% 0.63% 0.65% 0.58%** Net investment income 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 reduction for fees paid indirectly. The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Annual Report | 6/30/11 65 Notes to Financial Statements | 6/30/11 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. 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 unaudited information regarding the Fund's principal risks. Please refer to that document when considering the Fund's principal risks. 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 66 Pioneer Bond Fund | Annual Report | 6/30/11 of income, expenses and gains and losses on investments during the reporting period. Actual results could differ from those estimates. 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. Securities or 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. Thus, the valuation of the Fund's securities may differ from exchange prices. At June 30, 2011, one security was valued using fair value methods (in addition to securities valued using prices supplied by independent pricing services) representing 0.02% of net assets. 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. 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. Pioneer Bond Fund | Annual Report | 6/30/11 67 Principal amounts of mortgage-backed securities 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 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, 2011, the Fund reclassified $33,925 to decrease paid-in capital, $295,635 to decrease undistributed net investment income and $329,560 to decrease 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, 2011, the Fund had a net capital loss carryforward of $19,855,305, of which the following amounts will expire between 2014 and 2016 if not utilized: $4,912,667 in 2014, $7,351,686 in 2015 and $7,590,952 in 2016. Under the recently enacted Regulated Investment Company Modernization Act of 2010, the Fund will be permitted to carry forward capital losses 68 Pioneer Bond Fund | Annual Report | 6/30/11 incurred in taxable years beginning after December 22, 2010 for an unlimited period. However, any losses incurred during those future years will be required to be utilized prior to the losses incurred in pre-enactment tax years. As a result of this ordering rule, pre-enactment capital loss carryforwards may be more likely to expire unused. Additionally, post-enactment capital losses that are carried forward will retain their character as either short-term or long-term capital losses rather than being considered all short-term as under previous law. The tax character of distributions paid during the years ended June 30, 2011 and June 30, 2010 was as follows: -------------------------------------------------------------------------------- 2011 2010 -------------------------------------------------------------------------------- Distributions paid from: Ordinary income $57,808,812 $55,585,346 -------------------------------------------------------------------------------- Total $57,808,812 $55,585,346 ================================================================================ The following shows the components of distributable earnings on a federal income tax basis at June 30, 2011. -------------------------------------------------------------------------------- 2011 -------------------------------------------------------------------------------- Distributable earnings: Undistributed ordinary income $ 2,623,165 Undistributed long-term gain 6,833,664 Capital loss carryforward (19,855,305) Dividends payable (2,077,073) Unrealized appreciation 55,248,405 -------------------------------------------------------------------------------- Total $ 42,772,856 ================================================================================ The difference between book-basis and tax-basis unrealized appreciation 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 and the mark to market of futures contracts. 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 $127,870 in underwriting commissions on the sale of Class A shares during the year ended June 30, 2011. 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 Pioneer Bond Fund | Annual Report | 6/30/11 69 day. During the period, the Fund recognized gains of $261,076 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). 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. 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 value of contracts open during the year ended June 30, 2011 was $411. 70 Pioneer Bond Fund | Annual Report | 6/30/11 At June 30, 2011, open futures contracts were as follows: -------------------------------------------------------------------------------- Number of Contracts Settlement Unrealized Type Long/(Short) Month Value Gain/(Loss) -------------------------------------------------------------------------------- U.S. 10 Year Note (259) 9/11 $31,682,978 $490,336 U.S. 2 Year Note (CBT) (305) 9/11 66,899,859 (63,984) U.S. 5 Year Note 180 9/11 21,455,154 (198,594) U.S. Treasury Bond 86 9/11 10,580,692 (122,679) U.S. Ultra Bond (CBT) 32 9/11 4,040,000 (82,998) -------------------------------------------------------------------------------- $ 22,081 -------------------------------------------------------------------------------- F. 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. G. Securities Lending The Fund lends 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. Pioneer Bond Fund | Annual Report | 6/30/11 71 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, 2011, 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. Expenses waived during the year ended June 30, 2011 are reflected on the Statement of Operations. These expense limitations are in effect through November 1, 2013 for Class A and Class Z shares, through November 1, 2012 for Class B, Class C and Class R 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 $18,949 in management fees, administrative costs and certain other reimbursements payable to PIM at June 30, 2011. 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, 2011, such out-of-pocket expenses by class of shares were as follows: -------------------------------------------------------------------------------- Shareholder Communications: -------------------------------------------------------------------------------- Class A $ 707,888 Class B 16,017 Class C 83,199 Class R 30,909 Class Y 268,540 Class Z 571 -------------------------------------------------------------------------------- Total: $1,107,124 ================================================================================ 72 Pioneer Bond Fund | Annual Report | 6/30/11 Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $190,964 in transfer agent fees and out-of-pocket reimbursements payable to PIMSS at June 30, 2011. 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 $6,498 in distribution fees payable to PFD at June 30, 2011. 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 18 months of purchase (within 12 months for purchases made on or after April 1, 2009). 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 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, 2011, CDSCs in the amount of $143,068 were paid to PFD. Pioneer Bond Fund | Annual Report | 6/30/11 73 5. Expense Offset Arrangements The Fund has entered into certain expense offset arrangements with PIMSS that 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, 2011, 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, 2011 were as follows: ------------------------------------------------------------------------------------- Derivatives Not Accounted for as Hedging Instruments Under Accounting Standards Codification (ASC) 815 Asset Derivatives 2011 Liabilities Derivatives 2011 ------------------------------------------------------------------------------------- Balance Balance Sheet Location Value Sheet Location Value ------------------------------------------------------------------------------------- Interest Rate Futures Receivables* $30,780 Payables $-- ------------------------------------------------------------------------------------- Total ------------------------------------------------------------------------------------- * Represents the unrealized appreciation on futures. Receivable for variation margin on open futures contracts reflects unsettled variation margin. The effect of derivative instruments on the Statement of Operations for the year ended June 30, 2011 was as follows: --------------------------------------------------------------------------------------------------------- Derivatives Not Change in Accounted for as Realized Gain Unrealized Hedging Instruments or (Loss) on Gain or (Loss) Under Accounting Derivatives on Derivatives Standards Codification Location of Gain or (Loss) Recognized Recognized (ASC) 815 on Derivatives Recognized in Income in Income in Income --------------------------------------------------------------------------------------------------------- Interest Rate Futures Net realized gain on futures contracts $1,314,669 Interest Rate Futures Change in unrealized gain on futures contracts $22,081 --------------------------------------------------------------------------------------------------------- 7. Subsequent Events On August 5, 2011, Standard & Poor's Ratings Services (S&P) lowered its credit rating of the United States' long-term debt from AAA to AA+, with a "Negative" outlook. S&P reaffirmed its top (A-1+) rating on the U.S. government's short- term debt. S&P's downgrade reflects their opinion that the fiscal consolidation plan, that Congress and the Obama Administration agreed to on August 2, 2011 falls short of what would be necessary to stabilize the government's medium-term debt dynamics. The downgrade also reflects S&P's opinion that the effectiveness, stability, and predictability of U.S. policymaking and political institutions have weakened at a time of ongoing fiscal and economic challenges to a degree more than they envisioned when S&P assigned a negative outlook to the rating on April 18, 2011. The long-term effect of the downgrade is uncertain at this time. 74 Pioneer Bond Fund | Annual Report | 6/30/11 In preparing these financial statements, PIM has evaluated the impact of all events and transactions for potential recognition or disclosure and has determined that there were no additional subsequent events requiring recognition or disclosure in the financial statements. Pioneer Bond Fund | Annual Report | 6/30/11 75 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, 2011, 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, 2011, 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 as of June 30, 2011, 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 Boston, Massachusetts August 24, 2011 76 Pioneer Bond Fund | Annual Report | 6/30/11 ADDITIONAL INFORMATION (unaudited) The percentages of the Fund's ordinary income distributions that are exempt from nonresident alien (NRA) tax withholding resulting from qualified interest income and qualified short term gains were 87.64% and 0.0%, respectively. Pioneer Bond Fund | Annual Report | 6/30/11 77 Trustees, Officers and Service Providers Investment Adviser and Administrator Pioneer Investment Management, Inc. Custodian 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. 78 Pioneer Bond Fund | Annual Report | 6/30/11 Interested Trustees ------------------------------------------------------------------------------------------------------------------------------------ Position Held Length of Service and Other Directorships Name and Age With the Fund Term of Office Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ John F. Cogan, Jr. (84)* Chairman of the Board, Trustee since 1996. Non-Executive Chairman and a None Trustee and President Serves until a successor director of Pioneer trustee is elected or Investment Management USA earlier retirement or Inc. ("PIM-USA"); Chairman removal. and a director of Pioneer; Chairman and Director of Pioneer Institutional Asset Management, Inc. (since 2006); Director of Pioneer Alternative Investment Management Limited (Dublin); 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. (since 2004); Director of Fiduciary Counseling, Inc.; President and Director of Pioneer Funds Distributor, Inc. ("PFD") (until May 2006); President of all of the Pioneer Funds; and Of Counsel, Wilmer Cutler Pickering Hale and Dorr LLP ------------------------------------------------------------------------------------------------------------------------------------ Daniel K. Kingsbury (52)* Trustee and Executive Trustee since 2007. Director, CEO and President None Vice President Serves until a successor of PIM-USA (since February trustee is elected or 2007); Director and earlier retirement or President of Pioneer and removal. Pioneer Institutional Asset Management, Inc. (since February 2007); Executive Vice President of all of the Pioneer Funds (since March 2007); Director of PGAM (2007 - 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 | 6/30/11 79 Independent Trustees ------------------------------------------------------------------------------------------------------------------------------------ Position Held Length of Service and Other Directorships Name and Age With the Fund Term of Office Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ David R. Bock (67) Trustee Trustee since 2005. Managing Partner, Federal Director of Enterprise Serves until a successor City Capital Advisors Community Investment, trustee is elected or (corporate advisory services Inc. (privately held earlier retirement or company) (1997 - 2004 and affordable housing removal. 2008 - present); Interim finance company) (1985 Chief Executive Officer, - 2010); Director of Oxford Analytica, Inc. Oxford Analytica, Inc. (privately held research and (2008 - present); consulting company) (2010); Director of The Swiss Executive Vice President and Helvetia Fund, Inc. Chief Financial Officer, (closed-end fund) (2010 I-trax, Inc. (publicly - present); and Director traded health care services of New York Mortgage company) (2004 - 2007); and Trust (publicly traded Executive Vice President and mortgage REIT) (2004 - Chief Financial Officer, 2009) Pedestal Inc. (internet-based mortgage trading company) (2000 - 2002) ------------------------------------------------------------------------------------------------------------------------------------ Mary K. Bush (63) Trustee Trustee since 1997. Chairman, Bush Director of Marriott Serves until a successor International, LLC International, Inc. trustee is elected or (international financial (2008 - present); earlier retirement or advisory firm) (1991 - Director of Discover removal. present); Senior Managing Financial Services Director, Brock Capital (credit card issuer and Group, LLC (strategic electronic payment business advisors) (2010 - services) (2007 - present); Managing Director, present); Former Federal Housing Finance Director of Briggs & Board (oversight of Federal Stratton Co. (engine Home Loan Bank system) (1989 manufacturer) (2004 - - 1991); Vice President and 2009); Former Director Head of International of UAL Corporation Finance, Federal National (airline holding Mortgage Association (1988 - company) (2006 - 2010); 1989); U.S. Alternate Director of ManTech Executive Director, International International Monetary Fund Corporation (national (1984 - 1988); Executive security, defense, and Assistant to Deputy Secretary of the U.S. Treasury, U.S. Treasury Department (1982 - 1984); and Vice President and Team Leader in Corporate Banking, Bankers Trust Co. (1976 - 1982) ------------------------------------------------------------------------------------------------------------------------------------ 80 Pioneer Bond Fund | Annual Report | 6/30/11 ------------------------------------------------------------------------------------------------------------------------------------ Position Held Length of Service and Other Directorships Name and Age With the Fund Term of Office Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ Mary K. Bush (63) (continued) intelligence 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) ------------------------------------------------------------------------------------------------------------------------------------ Benjamin M. Friedman (66) Trustee Trustee since 2008. William Joseph Maier Trustee, Mellon Serves until a successor Professor of Political Institutional Funds trustee is elected or Economy, Harvard University Investment Trust and earlier retirement or (1972 - present) Mellon Institutional removal. Funds Master Portfolio (oversaw 17 portfolios in fund complex) (1989 - 2008) ------------------------------------------------------------------------------------------------------------------------------------ Pioneer Bond Fund | Annual Report | 6/30/11 81 Independent Trustees (continued) ------------------------------------------------------------------------------------------------------------------------------------ Position Held Length of Service and Other Directorships Name and Age With the Fund Term of Office Principal Occupation Held by Trustee ------------------------------------------------------------------------------------------------------------------------------------ Margaret B.W. Graham (63) Trustee Trustee since 1996. Founding Director, Vice None Serves until a successor President and Corporate trustee is elected or Secretary, The Winthrop earlier retirement or Group, Inc. (consulting removal. firm) (1982 - present); Desautels Faculty of Management, McGill University (1999 - present); and Manager of Research Operations and Organizational Learning, Xerox PARC, Xerox's Advance Research Center (1990 - 1994) ------------------------------------------------------------------------------------------------------------------------------------ Thomas J. Perna (60) Trustee Trustee since 2006. Chief Executive Officer, Director, Broadridge Serves until a successor Quadriserv, Inc. (technology Financial Solutions, trustee is elected or products for securities Inc. (investor earlier retirement or lending industry) (2008 - communications and removal. present); private investor securities processing (2004 - 2008); and Senior provider for financial Executive Vice President, services industry) (2009 The Bank of New York - present); and (financial and securities Director, Quadriserv, services) (1986 - 2004) Inc. (2005 - present) ------------------------------------------------------------------------------------------------------------------------------------ Marguerite A. Piret (62) Trustee Trustee since 1996. President and Chief Director of New America Serves until a successor Executive Officer, Newbury, High Income Fund, Inc. trustee is elected or Piret & Company, Inc. (closed-end investment earlier retirement or (investment banking firm) company) (2004 - removal. (1981 - present) present); and member, Board of Governors, Investment Company Institute (2000 - 2006) ------------------------------------------------------------------------------------------------------------------------------------ 82 Pioneer Bond Fund | Annual Report | 6/30/11 ------------------------------------------------------------------------------------------------------------------------------------ Position Held Length of Service and Other Directorships Name and Age With the Fund Term of Office Principal Occupation Held by Officer ------------------------------------------------------------------------------------------------------------------------------------ Christopher J. Kelley (46) Secretary Since 2010. Serves at Vice President and Associate None the discretion of the General Counsel of Pioneer Board. since January 2008 and Secretary of all of the Pioneer 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 (50) Assistant Secretary Since 2010. Serves at Fund Governance Director of None the discretion of the Pioneer since December 2006 Board. and Assistant Secretary of all the Pioneer Funds since 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 (48) Assistant Secretary Since 2010. Serves at Counsel of Pioneer since None the discretion of the June 2007 and Assistant Board. Secretary of all the Pioneer Funds since June 2010; and Vice President and Counsel at State Street Bank from October 2004 to June 2007 ------------------------------------------------------------------------------------------------------------------------------------ Mark E. Bradley (51) Treasurer Since 2008. Serves at Vice President -- Fund None the discretion of the Accounting, Administration Board. and Controllership Services of Pioneer; Treasurer of all of the Pioneer Funds since March 2008; Deputy Treasurer of Pioneer from March 2004 to February 2008; Assistant Treasurer of all of the Pioneer Funds from March 2004 to February 2008; and Treasurer and Senior Vice President, CDC IXIS Asset Management Services, from 2002 to 2003 ------------------------------------------------------------------------------------------------------------------------------------ Luis I. Presutti (46) Assistant Treasurer Since 2000. Serves at Assistant Vice President -- None the discretion of the Fund Accounting, Board. Administration and Controllership Services of Pioneer; and Assistant Treasurer of all of the Pioneer Funds ------------------------------------------------------------------------------------------------------------------------------------ Pioneer Bond Fund | Annual Report | 6/30/11 83 Fund Officers (continued) ------------------------------------------------------------------------------------------------------------------------------------ Position Held Length of Service and Other Directorships Name and Age With the Fund Term of Office Principal Occupation Held by Officer ------------------------------------------------------------------------------------------------------------------------------------ Gary Sullivan (53) Assistant Treasurer Since 2002. Serves at Fund Accounting Manager -- None the discretion of the Fund Accounting, Board. Administration and Controllership Services of Pioneer; and Assistant Treasurer of all of the Pioneer Funds ------------------------------------------------------------------------------------------------------------------------------------ David F. Johnson (31) Assistant Treasurer Since 2009. Serves at Fund Administration Manager None the discretion of the -- Fund Accounting, Board. Administration and Controllership Services since November 2008; Assistant Treasurer of all of the Pioneer Funds since January 2009; and Client Service Manager -- Institutional Investor Services at State Street Bank from March 2003 to March 2007 ------------------------------------------------------------------------------------------------------------------------------------ Jean M. Bradley (58) Chief Compliance Since 2010. Serves at Chief Compliance Officer of None Officer the discretion of the Pioneer and of all the Board. Pioneer Funds since March 2010; Director of Adviser and Portfolio Compliance at Pioneer since October 2005; and Senior Compliance Officer for Columbia Management Advisers, Inc. from October 2003 to October 2005 ------------------------------------------------------------------------------------------------------------------------------------ 84 Pioneer Bond Fund | Annual Report | 6/30/11 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 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; (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 $44,286 in 2011 and approximately $44,286 in 2010. (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 2011 or 2010. (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 2011 and $8,290 in 2010. (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, 2011 and 2010. (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, 2011 and 2010, 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 2011 and $8,290 in 2010. 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. (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, 2011 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, 2011 By (Signature and Title)* /s/ Mark Bradley Mark Bradley, Treasurer Date August 29, 2011 * Print the name and title of each signing officer under his or her signature.