OMB APPROVAL OMB Number: 3235-0570 Expires: August 31, 2010 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) Dorothy E. Bourassa, 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, 2009 through December 31, 2009 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 - -------------------------------------------------------------------------------- Semiannual Report | December 31, 2009 - -------------------------------------------------------------------------------- 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 48 Financial Highlights 52 Notes to Financial Statements 58 Approval of Investment Advisory Agreement 67 Trustees, Officers and Service Providers 71 Pioneer Bond Fund | Semiannual Report | 12/31/09 1 President's Letter Dear Shareowner, Stock and bond markets around the globe have begun to recover over the past year from one of their most tumultuous periods in history. This is a welcome relief, and we are generally optimistic about the prospects for the economy going forward. Still, challenges remain. Unemployment is high; consumer demand and loan growth are weak; and housing has not returned to normal. At Pioneer, we have long advocated the benefits of investing for the long term. This strategy has generally performed well for many investors. Those who remained invested in the market during the downturn have most likely seen their portfolios start to recover over the past year, as the Dow Jones Industrial Average climbed back from the depressed levels we saw in early 2009. Many bond investors have similarly seen a strong rebound, with a broad-based recovery occurring across many different fixed-income asset classes. The riskiest asset classes, such as high-yield bonds, outperformed other fixed-income asset classes during most of 2009. At Pioneer, we are not changing the approach to investing that we have used for more than 80 years. We remain focused on company fundamentals and risk management. Our investment process is based on careful research into individual companies, quantitative analysis, and active portfolio management. This three-pillared process, which we apply to each of our portfolios, is supported by an integrated team approach and is designed to carefully balance risk and reward. While we see potential opportunities for making money in many corners of the markets around the globe, it takes research and experience to separate solid investment opportunities from speculation. Following this difficult period, many investors are rethinking their approach to investing and risk management. Some are questioning whether the basic investment principles they were taught in the past are still useful in today's markets. Complicating matters is that financial markets remain unpredictable. 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. 2 Pioneer Bond Fund | Semiannual Report | 12/31/09 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 www.pioneerinvestments.com. We greatly appreciate your trust in us and we thank you for investing with Pioneer. Respectfully, /s/ Daniel K. Kingsbury Daniel K. Kingsbury President and CEO Pioneer Investment Management USA, Inc. 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 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 | Semiannual Report | 12/31/09 3 Portfolio Management Discussion | 12/31/09 Credit-sensitive bond prices continued their dramatic comeback during the second half of 2009, maintaining the upward momentum they established early in the year. In the following interview, Kenneth J. Taubes discusses the factors that influenced the performance of Pioneer Bond Fund during the six months ended December 31, 2009. Mr. Taubes, Head of U.S. Portfolio Management at Pioneer Investments, is responsible for the daily management of the Fund. Q How did the Fund perform during the six months ended December 31, 2009? A The Fund performed well. Pioneer Bond Fund's Class A shares returned 8.51% at net asset value over the six months ended December 31, 2009, while the Fund's benchmark, the Barclays Capital (formerly Lehman Brothers) Aggregate Bond Index (the Barclays Aggregate Index), returned 3.95%. Over the same period, the average return of the 156 funds in Lipper's Corporate Debt, A-rated, category was 7.87%. On December 31, 2009, the Fund's 30-day SEC yield on Class A shares was 4.53%. Q What were the principal factors affecting the Fund's performance during the six months ended December 31, 2009? A The Fund's emphasis on credit-sensitive securities, including investment- grade and high-yield corporate bonds, was the primary factor supporting its strong performance relative to both the Barclays Aggregate Index and the Lipper group over the six-month period. The Fund's performance benefited from the continuation of market trends that started early in 2009, as investors became increasingly willing to invest in securities carrying credit risk. Lower-rated securities substantially outperformed Treasuries and other high-grade bonds throughout 2009, including during the six-month period ended December 31; this reversed the trends of 2008, when higher-quality securities produced the best returns. Several factors were responsible for the turnabout, which occurred despite lackluster growth trends in the general economy. First, the widening of yield differences -- or spreads -- between lower-rated bonds and government and other higher-rated securities had reached 50-year peaks by the end of 2008. Corporate bonds were selling at very cheap valuations. Investment-grade corporate securities, for example, were priced as if bond default rates would approach Great Depression-era levels. Second, with their low- interest-rate monetary policies, the U.S. Federal Reserve (the Fed) and the central banks of other major economies incentivized investors to accept 4 Pioneer Bond Fund | Semiannual Report | 12/31/09 more credit risk in return for greater yields. Third, major banking institutions were successful in raising new capital, which directly strengthened their balance sheets and indirectly encouraged investors to return to asset classes they had abandoned in 2008 during the credit crisis. The resurgence in corporate bond performance, which had gained traction in March 2009, persisted throughout the six-month period ended December 31, 2009. Over the six months, securities with lower credit ratings generally outperformed higher-quality debt. For example, the Bank of America/Merrill Lynch High Yield Master II Index, which measures the performance of lower-rated or "high-yield" securities, generated a 21.75% total return for the same six-month period ended December 31, 2009, while the Barclays Capital Government Bond Index, which tracks government agency and other government-related issues, rose by just 1.00%. As a result, investors who had held credit-sensitive securities throughout the market cycle of 2008 and 2009 earned positive returns by the end of 2009, demonstrating the value of keeping a longer-term view. Q What were your principal investment strategies for the Fund during the six months ended December 31, 2009? A After their strong underperformance in 2008, we believed credit-sensitive securities offered tremendous potential value, and so we kept the Fund overweighted, relative to the Barclays Aggregate Index, in both investment- grade and high-yield corporate bonds. We anticipated that the Fed's monetary policy, combined with the Federal government's stimulus programs, would lead to an economic recovery, which would support corporate earnings. Although we had reduced the Fund's exposure to credit-related securities entering 2008, we began increasing the portfolio's exposure back in the summer and fall of 2008, and we continued to add to the positions through early 2009. The positioning proved successful, as corporate bonds continued to rebound throughout the second half of 2009. In addition to the Fund's general exposure to corporate debt, we maintained an overweighted position in bonds of some larger financial institutions, focusing on higher-quality banking corporations such as Goldman Sachs, JPMorgan Chase and U.S. Bancorp, and on financially strong insurance companies such as Met Life and Travelers. At the same time, we also emphasized investments in bonds of companies positioned to benefit from an economic recovery, such as industrials and materials institutions. At December 31, 2009, approximately 15.7% of the Fund's net assets were invested in high-yield corporate bonds (rated BB and below), with another 32.7% of assets invested in investment-grade debt rated either BBB or A. Government securities, primarily government-agency mortgage-backed securities, represented 42.3% of net assets. The portfolio's average credit Pioneer Bond Fund | Semiannual Report | 12/31/09 5 quality stood at "A" on December 31, 20091, down from the A+ average from six months earlier, while the Fund's average effective duration was 4.19 years, slightly less than the Barclays Aggregate Index. 1 Average Credit Quality is an asset weighted average of the higher rating of the fixed income securities, cash, and cash equivalents in the Fund as provided by Moody's or S&P. The rating also includes securities that have not been rated by either of the rating agencies, which has the effect of reducing the overall average. Source: Wilshire Axiom. Q What types of investments most affected Fund performance during the six months ended December 31, 2009? A Overweighting of credit-sensitive securities was the primary factor in the Fund's strong relative performance during the final six months of 2009, as well as for the full calendar year. Holdings in BBB-rated corporate debt, as well as high-yield bond exposure helped returns significantly, both because of the higher yields they offered and because of the price appreciation that occurred as the market for corporate securities rebounded. In addition, the Fund's underweighted position in government securities added to relative returns. Among individual holdings, notable contributions to the Fund's results came from investments in bonds of Lear, a producer of seating and electronic systems for the automotive market. The company's bonds gained after the corporation emerged from bankruptcy protection with a stronger financial structure. Securities of two real estate-related corporations also added to the Fund's performance: Forest City Enterprises and Australia-based Westfield Finance. Even during a period of strong performance, the Fund did have some investments that detracted from results, including securities of CIT, a commercial lending firm that filed for bankruptcy, and Kingsway America, an auto insurer based in Canada that specializes in non-standard coverage for high-risk drivers. We sold the positions in CIT securities. Q What is your investment outlook? A As we enter 2010, we think corporate debt securities still are modestly undervalued compared to historical norms. We also think the economy should continue to get a boost from the effects of the U.S. government's monetary and fiscal stimulus programs, which should help sustain the general recovery and the improvement in corporate earnings. In this environment, we think credit-sensitive securities should outperform government bonds, although the level of absolute returns will almost certainly fall short of 2009's results. In addition, global growth should provide the U.S. with expansion opportunities, as the dollar's weakened competitiveness should allow for some export growth. 6 Pioneer Bond Fund | Semiannual Report | 12/31/09 Going forward, we intend to continue to favor corporate bonds and loans, and non-agency mortgage-backed securities, two groups which we think offer superior potential on a total return basis. At the same time, with the effects of the Fed's zero-interest-rate policy still being felt, we expect to keep the portfolio's interest-rate positioning neutral; and we anticipate maintaining an underweighted exposure to government-agency mortgages, which appear expensive in relation to historical trends. Please refer to the Schedule of Investments on pages 18-47 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 issuers of underlying securities and their inability to meet their debt obligations. Prepayment risk is the chance that mortgage-backed bonds will be paid off early if falling interest rates prompt homeowners to refinance their mortgages. Forced to reinvest the unanticipated proceeds at lower interest rates, the Fund would experience a decline in income and lose the opportunity for additional price appreciation associated with falling interest rates. Investments in high-yield or lower-rated securities are subject to greater-than-average risk. The securities issued by U.S. Government sponsored entities (i.e., FNMA, 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 it more susceptible to any economic, political, or regulatory developments or other risks affecting those industries and sectors. 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 | Semiannual Report | 12/31/09 7 Portfolio Summary | 12/31/09 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 40.3% U.S. Government Securities 29.5% Collateralized Mortgage Obligations 13.0% Senior Secured Loans 6.5% Temporary Cash Investments 5.1% Asset Backed Securities 3.2% Municipal Bonds 0.8% Convertible Corporate Bonds 0.7% Preferred Stock 0.6% U.S. Common Stocks 0.1% Warrants 0.1% 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 2.0% AA 4.5% A 11.7% BBB 21.0% BB 10.4% B & Lower 5.3% Commercial Paper 2.8% Treasury/Agency 42.3% 10 Largest Holdings - -------------------------------------------------------------------------------- (As a percentage of total long-term holdings)* 1. U.S. Treasury Bonds, 2.75%, 2/15/19 1.84% - -------------------------------------------------------------------------------- 2. U.S. Treasury Notes, 4.5%, 8/15/39 1.12 - -------------------------------------------------------------------------------- 3. U.S. Treasury Bonds, 3.875%, 5/15/18 1.03 - -------------------------------------------------------------------------------- 4. U.S. Treasury Notes, 0.75%, 11/30/11 0.86 - -------------------------------------------------------------------------------- 5. LB-UBS Commercial Mortgage, 5.372%, 9/15/39 0.84 - -------------------------------------------------------------------------------- 6. Wachovia Bank Commercial Mortgage Trust, 4.368%, 8/15/41 0.82 - -------------------------------------------------------------------------------- 7. Goldman Sachs Capital, Floating Rate Note, 12/29/49 0.76 - -------------------------------------------------------------------------------- 8. U.S. Treasury Notes, 4.5%, 5/15/38 0.73 - -------------------------------------------------------------------------------- 9. Forest City Enterprises, 7.625%, 6/1/15 0.65 - -------------------------------------------------------------------------------- 10. U.S. Treasury Notes, 4.5%, 2/15/36 0.64 - -------------------------------------------------------------------------------- * 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 | Semiannual Report | 12/31/09 Prices and Distributions | 12/31/09 Net Asset Value per Share - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Class 12/31/09 6/30/09 - -------------------------------------------------------------------------------- A $ 9.12 $ 8.63 - -------------------------------------------------------------------------------- B $ 9.07 $ 8.58 - -------------------------------------------------------------------------------- C $ 9.03 $ 8.54 - -------------------------------------------------------------------------------- R $ 9.20 $ 8.71 - -------------------------------------------------------------------------------- Y $ 9.04 $ 8.55 - -------------------------------------------------------------------------------- Z $ 9.15 $ 8.67 - -------------------------------------------------------------------------------- Distributions per Share: 7/1/09-12/31/09 - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Net Investment Short-Term Long-Term Class Income Capital Gains Capital Gains - -------------------------------------------------------------------------------- A $ 0.2394 $ -- $ -- - -------------------------------------------------------------------------------- B $ 0.1916 $ -- $ -- - -------------------------------------------------------------------------------- C $ 0.1943 $ -- $ -- - -------------------------------------------------------------------------------- R $ 0.2239 $ -- $ -- - -------------------------------------------------------------------------------- Y $ 0.2466 $ -- $ -- - -------------------------------------------------------------------------------- Z $ 0.2499 $ -- $ -- - -------------------------------------------------------------------------------- Pioneer Bond Fund | Semiannual Report | 12/31/09 9 Performance Update | 12/31/09 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 December 31, 2009) - -------------------------------------------------------------------------------- Net Asset Public Offering Period Value (NAV) Price (POP) - -------------------------------------------------------------------------------- 10 Years 6.34% 5.85% 5 Years 4.85 3.89 1 Year 17.70 12.37 - -------------------------------------------------------------------------------- Expense Ratio (Per prospectus dated November 1, 2009) - -------------------------------------------------------------------------------- Gross Net - -------------------------------------------------------------------------------- 1.09% 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 12/99 9,550 10,000 10,352 11,163 12/01 11,132 12,105 12,108 13,347 12/03 13,181 13,894 13,933 14,497 12/05 14,276 14,849 14,783 15,493 12/07 15,683 16,572 14,999 17,440 12/09 17,654 18,475 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 4.5% 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 contractual expense limitations currently in effect through November 1, 2013, for Class A 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. 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. You cannot invest directly in an index. 10 Pioneer Bond Fund | Semiannual Report | 12/31/09 Performance Update | 12/31/09 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 December 31, 2009) - ----------------------------------------------------------------- If If Period Held Redeemed - ----------------------------------------------------------------- 10 Years 5.39% 5.39% 5 Years 3.86 3.86 1 Year 16.59 12.59 - ----------------------------------------------------------------- Expense Ratio (Per prospectus dated November 1, 2009) - ----------------------------------------------------------------- Gross Net - ----------------------------------------------------------------- 1.99% 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 12/99 10,000 10,000 10,730 11,163 12/01 11,464 12,105 12,357 13,347 12/03 13,339 13,894 13,983 14,497 12/05 14,184 14,849 14,556 15,493 12/07 15,306 16,572 14,494 17,440 12/09 16,899 18,475 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 continues to be 4%. For more complete information, please see the prospectus for details. 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. See the prospectus and financial statements for more information. The net expense ratio reflects the contractual expense limitation currently in effect through November 1, 2011, 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 fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. 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. You cannot invest directly in an index. Pioneer Bond Fund | Semiannual Report | 12/31/09 11 Performance Update | 12/31/09 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 December 31, 2009) - ----------------------------------------------------------------- If If Period Held Redeemed - ----------------------------------------------------------------- 10 Years 5.37% 5.37% 5 Years 3.91 3.91 1 Year 16.64 16.64 - ----------------------------------------------------------------- Expense Ratio (Per prospectus dated November 1, 2009) - ----------------------------------------------------------------- Gross Net - ----------------------------------------------------------------- 1.83% 1.83% - ----------------------------------------------------------------- [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 12/99 10,000 10,000 10,755 11,163 12/01 11,440 12,105 12,318 13,347 12/03 13,275 13,894 13,928 14,497 12/05 14,135 14,849 14,498 15,493 12/07 15,269 16,572 14,469 17,440 12/09 16,876 18,475 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 of Class C shares does not reflect the 1% front-end sales charge in effect prior to February 1, 2004. If you paid a 1% sales charge, your returns would be lower than those shown above. "If Held" results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. 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. You cannot invest directly in an index. 12 Pioneer Bond Fund | Semiannual Report | 12/31/09 Performance Update | 12/31/09 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 December 31, 2009) - ----------------------------------------------------------------- If If Period Held Redeemed - ----------------------------------------------------------------- 10 Years 6.01% 6.01% 5 Years 4.52 4.52 1 Year 17.31 17.31 - ----------------------------------------------------------------- Expense Ratio (Per prospectus dated November 1, 2009) - ----------------------------------------------------------------- Gross Net - ----------------------------------------------------------------- 1.30% 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 12/99 10,000 10,000 10,792 11,163 12/01 11,547 12,105 12,498 13,347 12/03 13,601 13,894 14,366 14,497 12/05 14,669 14,849 15,154 15,493 12/07 16,058 16,572 15,276 17,440 12/09 17,920 18,475 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 after April 1, 2003, the actual performance of Class R shares is reflected. The performance of 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 contractual expense limitation currently in effect through November 1, 2011, 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. 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. You cannot invest directly in an index. Pioneer Bond Fund | Semiannual Report | 12/31/09 13 Performance Update | 12/31/09 Class Y 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 December 31, 2009) - ----------------------------------------------------------------- If If Period Held Redeemed - ----------------------------------------------------------------- 10 Years 6.68% 6.68% 5 Years 5.19 5.19 1 Year 17.95 17.95 - ----------------------------------------------------------------- Expense Ratio (Per prospectus dated November 1, 2009) - ----------------------------------------------------------------- Gross Net - ----------------------------------------------------------------- 0.64% 0.64% - ----------------------------------------------------------------- [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 12/99 10,000 10,000 10,845 11,163 12/01 11,676 12,105 12,748 13,347 12/03 13,935 13,894 14,819 14,497 12/05 15,230 14,849 15,837 15,493 12/07 16,865 16,572 16,181 17,440 12/09 19,086 18,475 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 Y shares prior to their inception would have been higher than that shown. Class Y shares are not subject to sales charges and are available for limited groups of eligible investors, including institutional investors. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. 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. You cannot invest directly in an index. 14 Pioneer Bond Fund | Semiannual Report | 12/31/09 Performance Update | 12/31/09 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 December 31, 2009) - ----------------------------------------------------------------- If If Period Held Redeemed - ----------------------------------------------------------------- 10 Years 6.46% 6.46% 5 Years 5.07 5.07 1 Year 18.36 18.36 - ----------------------------------------------------------------- Expense Ratio (Per prospectus dated November 1, 2009) - ----------------------------------------------------------------- Gross Net - ----------------------------------------------------------------- 0.67% 0.65% - ----------------------------------------------------------------- [THE FOLLOWING DATA WAS REPRESENTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL] Value of $10,000 Investment Pioneer Barclays Capital Bond Fund Aggregate Bond Index 12/99 10,000 10000 10,845 11163 12/01 11,663 12105 12,686 13347 12/03 13,809 13894 14,597 14497 12/05 14,957 14849 15,488 15493 12/07 16,471 16572 15,794 17440 12/09 18,694 18475 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 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. 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. You cannot invest directly in an index. Pioneer Bond Fund | Semiannual Report | 12/31/09 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 July 1, 2009 through December 31, 2009. - --------------------------------------------------------------------------------------------------------------------- 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 7/1/09 - --------------------------------------------------------------------------------------------------------------------- Ending Account Value $1,085.10 $1,079.80 $1,080.50 $1,082.40 $1,086.70 $1,084.70 (after expenses) on 12/31/09 - --------------------------------------------------------------------------------------------------------------------- Expenses Paid $4.47 $9.96 $9.28 $6.56 $3.21 $3.26 During Period* - --------------------------------------------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized expense ratio of 0.85%, 1.90%, 1.77%, 1.25%, 0.61%, and 0.62% 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 184/365 (to reflect the one-half year period). 16 Pioneer Bond Fund | Semiannual Report | 12/31/09 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 July 1, 2009 through December 31, 2009. - --------------------------------------------------------------------------------------------------------------------- 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 7/1/09 - --------------------------------------------------------------------------------------------------------------------- Ending Account Value $1,020.92 $1,015.63 $1,016.28 $1,018.90 $1,022.13 $1,022.08 (after expenses) on 12/31/09 - --------------------------------------------------------------------------------------------------------------------- Expenses Paid $4.33 $9.65 $9.00 $6.36 $3.11 $3.16 During Period* - --------------------------------------------------------------------------------------------------------------------- * Expenses are equal to the Fund's annualized expense ratio of 0.85%, 1.90%, 1.77%, 1.25%, 0.61%, and 0.62% 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 184/365 (to reflect the one-half year period). Pioneer Bond Fund | Semiannual Report | 12/31/09 17 Schedule of Investments | 12/31/09 (unaudited) - ----------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount (unaudited) (unaudited) Value - ----------------------------------------------------------------------------------------------------- CONVERTIBLE CORPORATE BONDS -- 0.7% ENERGY -- 0.3% Coal & Consumable Fuels -- 0.2% $2,680,000 BB-/NR Massey Energy Co., 3.25%, 8/1/15 $ 2,341,650 - ----------------------------------------------------------------------------------------------------- Oil & Gas Drilling -- 0.1% 1,275,000 BBB+/Baa2 Transocean Sedco, 1.625%, 12/15/37 $ 1,262,250 -------------- Total Energy $ 3,603,900 - ----------------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 0.1% Health Care Services -- 0.1% 2,570,000 B+/B3 Omnicare, Inc., 3.25%, 12/15/35 $ 2,091,338 -------------- Total Health Care Equipment & Services $ 2,091,338 - ----------------------------------------------------------------------------------------------------- BANKS -- 0.2% Regional Banks -- 0.2% 2,100,000 A/A3 National City Corp., 4.0%, 2/1/11 $ 2,139,375 -------------- Total Banks $ 2,139,375 - ----------------------------------------------------------------------------------------------------- TELECOMMUNICATION SERVICES -- 0.1% Integrated Telecommunication Services -- 0.1% 709,000 B+/B1 Qwest Communications International, 3.5%, 11/15/25 $ 735,588 -------------- Total Telecommunication Services $ 735,588 - ----------------------------------------------------------------------------------------------------- TOTAL CONVERTIBLE CORPORATE BONDS (Cost $6,784,892) $ 8,570,201 - ----------------------------------------------------------------------------------------------------- Shares - ----------------------------------------------------------------------------------------------------- PREFERRED STOCKS -- 0.6% DIVERSIFIED FINANCIALS -- 0.4% Diversified Finance Services -- 0.4% 4,880 Bank of America Corp., 7.25%, 12/31/49 $ 4,294,400 -------------- Total Diversified Financials $ 4,294,400 - ----------------------------------------------------------------------------------------------------- INSURANCE -- 0.2% Life & Health Insurance -- 0.2% 153,800 Delphi Financial Group, 7.376% 5/15/37 $ 2,737,640 -------------- Total Insurance $ 2,737,640 - ----------------------------------------------------------------------------------------------------- TOTAL PREFERRED STOCKS (Cost $7,295,844) $ 7,032,040 - ----------------------------------------------------------------------------------------------------- COMMON STOCK -- 0.1% AUTOMOBILES & COMPONENTS -- 0.1% Auto Parts & Equipment -- 0.1% 22,542 Lear Corp.* $ 1,524,741 -------------- Total Automobiles & Components $ 1,524,741 - ----------------------------------------------------------------------------------------------------- TOTAL COMMON STOCK (Cost $1,006,417) $ 1,524,741 - ----------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 18 Pioneer Bond Fund | Semiannual Report | 12/31/09 - ----------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount (unaudited) (unaudited) Value - ----------------------------------------------------------------------------------------------------- ASSET BACKED SECURITIES -- 3.2% MATERIALS -- 0.0% Steel -- 0.0% $ 706,528 AA+/Aa1 Master Asset Backed Securities Trust, 0.67375%, 5/25/35 $ 662,140 -------------- Total Materials $ 662,140 - ----------------------------------------------------------------------------------------------------- CONSUMER SERVICES -- 0.9% Restaurants -- 0.9% 2,025,000 BBB-/Baa3 Dominos Pizza Master Issuer LLC, 5.261%, 4/25/37 $ 1,735,541 5,325,000 BB/Aaa Dominos Pizza Master Issuer LLC, 7.629%, 4/25/37 4,047,000 700,000 BBB-/Baa3 Dunkin Brands Master Finance LLC, 5.779%, 6/20/31 674,905 4,535,000 BB/Ba3 Dunkin Brands Master Finance LLC, 8.28%, 6/20/31 (144A) 3,831,894 -------------- $ 10,289,340 -------------- Total Consumer Services $ 10,289,340 - ----------------------------------------------------------------------------------------------------- BANKS -- 1.8% Thrifts & Mortgage Finance -- 1.8% 2,150,000 0.33 AAA/Ba3 Carrington Mortgage Loan Trust, Floating Rate Note, 10/25/36 $ 1,638,891 598,221 0.72 AA/A1 Carrington Mortgage Loan Trust, Floating Rate Note, 2/25/35 547,800 639,896 0.63 AAA/Aa1 Carrington Mortgage Loan Trust, Floating Rate Note, 9/25/35 539,192 1,327,493 0.38 B/Ba2 CMLTI 2006-WFH2 A2A, Floating Rate Note, 8/25/36 957,265 2,575,000 0.74 AA+/Aa1 Countrywide Asset Backed Certificates, Floating Rate Note, 11/25/35 2,145,241 2,667,487 5.07 AAA/Aaa Countrywide Asset Backed Certificates, Floating Rate Note, 12/25/35 2,530,577 1,047,000 0.65 AA+/Aa1 Countrywide Asset Backed Certificates, Floating Rate Note, 8/25/35 889,451 2,370,734 0.65 AA+/Aa1 Countrywide Asset Backed Certificates, Floating Rate Note, 8/25/35 2,266,766 1,838,140 0.52 AAA/Aaa FBR Securitization Trust, 2.76188%, 9/25/35 1,705,349 160,351 0.77 AAA/Aaa First Franklin Mortgage Loan Asset Backed Certificate, Floating Rate Note, 9/24/34 138,124 184,281 0.30 AAA/Aaa GSAMP Trust, Floating Rate Note, 1/25/37 180,569 356,602 0.49 AAA/Aa2 GSAMP Trust, Floating Rate Note, 11/25/35 349,890 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Semiannual Report | 12/31/09 19 Schedule of Investments | 12/31/09 (unaudited) (continued) Floating S&P/Moody's Principal Rate (d) Ratings Amount (unaudited) (unaudited) Value Thrifts & Mortgage Finance -- (continued) $ 864,640 0.66 A/A2 GSAMP Trust, Floating Rate Note, 3/25/35 $ 831,361 602,471 0.60 AAA/Aaa GSAMP Trust, Floating Rate Note, 8/25/36 582,360 5,050,769 BBB/Baa3 Local Insight Media Finance LLC, 5.88%, 10/23/37 2,373,861 896,716 0.29 B/A2 Morgan Stanley Capital, Inc., Floating Rate Note, 12/25/36 827,996 24,805 0.64 AA+/Aa2 Morgan Stanley Capital, Inc., Floating Rate Note, 3/25/35 24,640 404,357 AAA/Aa2 Morgan Stanley IXIS Real Estate, 1.445%, 11/25/36 396,856 1,893,851 0.48 AAA/Aa2 SASC 2007-BC4 A3, Floating Rate Note, 11/25/37 1,766,657 -------------- $ 20,692,846 -------------- Total Banks $ 20,692,846 - -------------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 0.5% Consumer Finance -- 0.2% 707,151 0.31 A+/A2 Indymac Residential, Floating Rate Note, 7/25/37 $ 684,553 370,779 0.35 AAA/Aa2 Nomura Home Equity Trust, Floating Rate Note, 3/25/36 364,386 1,500,000 0.67 AA+/Aa1 RASC 2005-KS7 M1, Floating Rate Note 8/25/35 1,177,963 -------------- $ 2,226,902 - -------------------------------------------------------------------------------------------------------- Diversified Financial Services -- 0.2% 420,000 0.67 AA/Aa2 Asset Backed Securities Corp., Floating Rate Note, 4/25/35 $ 390,664 1,675,000 AA/NR DT Auto Owner Trust, 5.92%, 10/15/15 1,680,528 600,409 0.47 AAA/Aaa JPMorgan Mortgage Acquisition, Floating Rate Note, 12/25/35 539,843 -------------- $ 2,611,035 - -------------------------------------------------------------------------------------------------------- Investment Banking & Brokerage -- 0.0% 1,725,000 0.39 CCC/Caa3 MLMI 2006-AR1 A2C, Floating Rate Note, 3/25/37 $ 666,455 - -------------------------------------------------------------------------------------------------------- Specialized Finance -- 0.1% 900,000 0.63 AAA/Aaa SLMA 2004-10 A6B, Floating Rate Note, 4/27/26 $ 857,340 -------------- Total Diversified Financials $ 6,361,732 - -------------------------------------------------------------------------------------------------------- TOTAL ASSET BACKED SECURITIES (Cost $43,504,989) $ 38,006,058 - -------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 20 Pioneer Bond Fund | Semiannual Report | 12/31/09 - ------------------------------------------------------------------------------------------------------ Floating S&P/Moody's Principal Rate (d) Ratings Amount (unaudited) (unaudited) Value - ------------------------------------------------------------------------------------------------------ COLLATERALIZED MORTGAGE OBLIGATIONS -- 13.2% MATERIALS -- 0.7% Forest Products -- 0.5% $1,435,000 AA/Aa2 T SRAR 2006-1 B, 5.7467%, 10/15/36 $ 1,348,900 4,470,000 AAA/Aaa TSTAR 2006-1A A, 5.668%, 10/15/36 4,246,500 -------------- $ 5,595,400 - ------------------------------------------------------------------------------------------------------ Steel -- 0.2% 2,019,316 AAA/Aaa GMAC Mortgage Corp. Loan Trust, 5.5%, 11/25/33 $ 2,053,077 -------------- Total Materials $ 7,648,477 - ------------------------------------------------------------------------------------------------------ COMMERCIAL SERVICES & SUPPLIES -- 0.1% Diversified Support Services -- 0.1% 944,583 AAA/NR CW Capital Cobalt, Ltd., 5.174%, 8/15/48 $ 953,800 -------------- Total Commercial Services & Supplies $ 953,800 - ------------------------------------------------------------------------------------------------------ BANKS -- 8.5% Thrifts & Mortgage Finance -- 8.5% 2,842,726 NR/Aaa Banc of America Alternative Loan Trust, 5.5%, 9/25/33 $ 2,833,398 1,891,727 AAA/Aaa Bayview Commercial Asset Trust, 0.67375%, 4/25/34 1,366,196 2,100,000 5.00 AAA/Aa1 BCAP LLC 2006-RR1 PB, Floating Rate Note, 11/25/36 2,074,379 3,000,000 NR/Aa1 Chase Mortgage Finance Corp., 5.5%, 5/25/35 2,771,123 3,092,336 CCC/Caa1 Chase Mortgage Finance Corp., 5.5%, 5/25/37 2,806,295 1,182,821 AAA/AAA Countrywide Alternative Loan Trust, 5.0%, 7/25/18 1,165,079 1,072,000 AAA/Aa2 Countrywide Alternative Loan Trust, 5.125%, 3/25/34 999,212 7,000,000 AA/NR Countrywide Alternative Loan Trust, 5.5%, 4/25/35 4,103,546 2,112,447 BBB/Ba1 Countrywide Home Loan Mortgage, 4.5%, 9/25/35 1,544,997 900,000 NR/Baa3 Countrywide Home Loan Mortgage, 5.5%, 9/25/35 830,966 525,000 NR/Baa3 CWHL 2005-16 A22, 5.5%, 9/25/35 483,473 716,246 AAA/Aaa Downey Savings & Loan, 0.83625%, 7/19/44 420,221 3,375,000 AAA/Aaa GMAC Commercial Mortgage Securities, Inc., 4.864%, 12/10/41 3,245,921 2,900,000 AAA/Aaa GS Mortgage Securities Corp. II, 7.12%, 11/18/29 3,092,938 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Semiannual Report | 12/31/09 21 Schedule of Investments | 12/31/09 (unaudited) (continued) - ----------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount (unaudited) (unaudited) Value - ----------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) $ 1,230,224 0.63 NR/Aaa Impac CMB Trust, Floating Rate Note, 11/25/35 $ 861,148 390,483 1.03 AAA/Aaa Impac Securities Assets Corp., Floating Rate Note, 11/25/34 348,818 1,555,947 0.58 AAA/Aaa Impac Securities Assets Corp., Floating Rate Note, 5/25/36 1,191,992 2,600,000 AAA/Aaa JPMorgan Mortgage Trust, 4.5%, 8/25/19 2,506,720 3,535,377 AAA/Aa3 JPMorgan Mortgage Trust, 6.0%, 8/25/34 3,213,878 1,750,000 AAA/Aaa JPMCC 2002-C3 B, 5.146%, 7/12/35 1,724,300 10,000,000 AAA/Aaa LB-UBS Commercial Mortgage, 5.372%, 9/15/39 9,532,529 2,385,914 AA/Aa2 Master Adjustable Rate Mortgage Trust, 5.194229%, 1/25/35 1,975,886 4,318,437 AAA/AAA Master Alternative Loans Trust, 6.0%, 7/25/34 3,709,808 1,308,487 AAA/Aaa Master Asset Securitization Trust, 5.5%, 11/25/33 1,319,568 1,880,777 BB-/Ba3 Residential Funding Mortgage Securities, 5.5%, 11/25/35 1,781,629 8,510,000 5.54 A+/A3 SASC 2007 BHC1 A1, Floating Rate Note, 12/18/49 1,513,078 2,890,000 5.58 BB+/NR SASC 2007 BHC1 A2, Floating Rate Note, 12/18/49 194,584 2,010,000 NR/Ba1 SBA CMBS Trust, 6.709%, 11/15/36 2,045,175 9,308,089 AAA/Aaa Wachovia Bank Commercial Mortgage Trust, 4.368%, 8/15/41 9,295,578 3,787,250 AAA/Aaa Wachovia Bank Commercial Mortgage Trust, 4.803%, 10/15/41 3,624,165 972,614,895 0.15 AAA/Aaa Wachovia Bank Commercial Mortgage Trust, Floating Rate Note, 6/15/45 1,662,782 2,050,000 AAA/Baa1 WAMU 2003-S1 A5, 5.5%, 4/25/33 2,010,035 1,829,641 AAA/Aaa WAMU Mortgage Pass-Through Certificate, 4.5%, 8/25/18 1,775,222 2,622,505 0.46 AAA/Aa1 WAMU Mortgage Pass-Through Certificate, Floating Rate Note, 4/25/45 1,929,177 1,450,000 AAA/Aaa WBCMT 2003-C9 B, 5.109%, 12/15/35 1,292,341 2,497,738 AAA/NR Wells Fargo Mortgage Backed Securities, 5.0%, 11/25/20 2,460,272 2,057,300 NR/Baa3 Wells Fargo Mortgage Backed Securities, 5.0%, 3/25/21 1,944,149 1,319,008 AAA/Aaa Wells Fargo Mortgage Backed Securities, 5.25%, 12/25/33 1,314,680 752,894 NR/Ba2 Wells Fargo Mortgage Backed Securities, 5.5%, 11/25/35 699,739 The accompanying notes are an integral part of these financial statements. 22 Pioneer Bond Fund | Semiannual Report | 12/31/09 - -------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount (unaudited) (unaudited) Value - -------------------------------------------------------------------------------------------------------- Thrifts & Mortgage Finance -- (continued) $ 3,018,403 AAA/A1 Wells Fargo Mortgage Backed Securities, 5.5%, 5/25/35 $ 3,006,189 2,720,334 3.25 AAA/Aaa Wells Fargo Mortgage Backed Securities, Floating Rate Note, 9/25/34 2,603,813 1,723,102 4.58 AAA/Aaa WFMBS 2003-N-1A1, Floating Rate Note, 12/25/33 1,717,031 4,200,000 4.76 AAA/Aaa WFMBS 2004-L A6, Floating Rate Note, 7/25/34 4,168,129 -------------- $ 99,160,159 -------------- Total Banks $ 99,160,159 - -------------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 1.6% Diversified Financial Services -- 1.5% 940,428 AAA/NR Banc of America Mortgage Securities, Inc., 5.75%, 1/25/35 $ 930,142 3,300,000 AAA/NR Banc of America Mortgage Securities, Inc., 5.0%, 8/25/33 3,264,007 1,610,000 6.28 NR/Aaa Chase Commercial Mortgage Securities Corp., Floating Rate Note, 2/12/16 1,678,746 1,950,000 NR/A1 Citicorp Mortgage Securities, 5.5%, 4/25/35 1,858,289 1,832,783 NR/A2 CMSI 2006-1 3A1, 5.0%, 2/25/36 1,597,415 195,000 AA/Aa2 Crown Castle Towers LLC, 4.878%, 6/15/35 196,950 2,435,000 NR/Aa2 Crown Castle Towers LLC, 5.362%, 11/15/36 2,495,875 394,932 AAA/Aaa First Horizon Mortgage Pass-Through Trust, 5.0%, 3/25/18 396,907 2,341,014 CCC/NR JPMorgan Alternative Loan Trust, 6.0%, 3/25/36 1,653,358 997,422 AAA/Aaa Morgan Stanley Capital I, 5.25%, 12/25/17 982,726 302,421 AAA/Aaa Morgan Stanley Capital I, 7.0%, 7/25/33 279,975 1,769,072 5.66 B/Ba2 RALI 2005-QA10 A41, 5.7412%, 9/25/35 1,136,061 1,172,461 AA-/B3 Residential Accredit Loans, Inc., 0.49875%, 5/25/47 612,034 -------------- $ 17,082,485 - -------------------------------------------------------------------------------------------------------- Investment Banking & Brokerage -- 0.1% 1,440,000 AAA/Aaa Banc of America Commercial Mortgage, Inc., 4.877%, 7/10/42 $ 1,433,021 117,932,255 AAA/Aaa MSDWC 2000-1345 X, 0.7259%, 9/3/15 489,466 -------------- $ 1,922,487 -------------- Total Diversified Financials $ 19,004,972 - -------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Semiannual Report | 12/31/09 23 Schedule of Investments | 12/31/09 (unaudited) (continued) - ----------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount (unaudited) (unaudited) Value - ----------------------------------------------------------------------------------------------------- REAL ESTATE -- 0.3% Mortgage Real Estate Investment Trusts -- 0.3% $3,424,138 AAA/Aaa CS First Boston Mortgage Security, 3.5%, 7/25/18 $ 3,271,719 674,488 AA/Aa2 CS First Boston Mortgage Security, 7.0%, 5/25/32 387,909 -------------- $ 3,659,628 -------------- Total Real Estate $ 3,659,628 - ----------------------------------------------------------------------------------------------------- GOVERNMENT -- 2.0% 2,700,000 NR/NR Fannie Mae Remics, 5.0%, 3/25/24 $ 2,834,790 5,000,000 NR/NR Fannie Mae Remics, 5.0%, 7/25/33 5,133,599 611,226 AAA/Aaa Fannie Mae Remics, 5.69%, 1/25/32 643,199 378,444 AAA/Aaa Federal Home Loan Bank, 6.0%, 4/15/32 394,784 2,665 NR/NR Federal National Mortgage Association, 10.3%, 4/25/19 2,780 7,751 NR/NR Federal National Mortgage Association, 10.3%, 4/25/19 9,037 3,400,000 AAA/Aaa FHR 3211 PB, 5.5%, 2/15/33 3,582,642 5,000,000 NR/NR Freddie Mac Remics, 5.0%, 6/15/33 5,139,871 1,583,912 AAA/Aaa Freddie Mac, 5.0%, 8/15/35 1,650,453 2,878,106 AAA/Aaa Freddie Mac, 6.1%, 9/15/18 2,904,471 1,477,880 AAA/A2 GSR Mortgage Loan Trust, 4.1408%, 6/25/34 1,393,729 -------------- $ 23,689,355 -------------- Total Government $ 23,689,355 - ----------------------------------------------------------------------------------------------------- TOTAL COLLATERALIZED MORTGAGE OBLIGATIONS (Cost $170,634,115) $ 154,116,391 - ----------------------------------------------------------------------------------------------------- CORPORATE BONDS -- 40.9% ENERGY -- 4.5% Integrated Oil & Gas -- 0.2% 1,200,000 AA/Aa1 BP Capital Markets Plc, 5.25%, 11/7/13 $ 1,307,075 990,000 BBB+/Baa1 Marathon Oil Corp., 5.9%, 3/15/18 1,042,802 45,000 BBB+/Baa2 Petro-Canada, 4.0%, 7/15/13 46,459 -------------- $ 2,396,336 - ----------------------------------------------------------------------------------------------------- Oil & Gas Drilling -- 0.4% 5,150,000 BBB+/Baa2 Transocean Sedco, 1.5%, 12/15/37 $ 4,969,750 - ----------------------------------------------------------------------------------------------------- Oil & Gas Equipment & Services -- 0.4% 1,000,000 3.52 NR/NR Sevan Marine ASA, Floating Rate Note, 5/14/13 (144A) $ 790,000 2,815,000 BBB+/Baa1 Weatherford International, Ltd., 9.625%, 3/1/19 3,509,469 -------------- $ 4,299,469 - ----------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 24 Pioneer Bond Fund | Semiannual Report | 12/31/09 - ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount (unaudited) (unaudited) Value - ------------------------------------------------------------------------------------------------------- Oil & Gas Exploration & Production -- 1.0% $2,180,000 BBB/Baa2 Canadian Natural Resource, 5.9%, 2/1/18 $ 2,342,861 1,020,000 BB/Ba3 Chesapeake Energy Corp., 9.5%, 2/15/15 (b) 1,119,450 160,000 BB/B1 Denbury Resources, Inc., 9.75%, 3/1/16 170,800 1,887,243 BBB+/NR Gazprom International SA, 7.201%, 2/1/20 1,922,629 1,605,000 A/Aa2 Ras Laffan Liquefied Natural Gas Co., Ltd. III, 5.832%, 9/30/16 (144A) 1,680,772 200,000 BBB-/Baa2 TNK-BP Finance SA, 6.625%, 3/20/17 195,500 1,000,000 BBB-/Baa2 TNK-BP Finance SA, 6.625%, 3/20/17 (144A) 977,500 2,080,000 BBB-/Baa2 TNK-BP Finance SA, 7.5%, 7/18/16 (144A) 2,132,000 1,000,000 BBB-/Baa2 TNK-BP Finance SA, 7.875%, 3/13/18 (144A) 1,027,500 -------------- $ 11,569,012 - ------------------------------------------------------------------------------------------------------- Oil & Gas Refining & Marketing -- 0.5% 2,475,000 BBB/Baa2 Spectra Energy Capital, 6.2%, 4/15/18 $ 2,628,485 2,890,000 BBB/Baa2 Valero Energy Corp., 9.375%, 3/15/19 3,437,360 -------------- $ 6,065,845 - ------------------------------------------------------------------------------------------------------- Oil & Gas Storage & Transportation -- 2.0% 435,000 BBB-/Baa2 Boardwalk Pipelines LLC, 5.5%, 2/1/17 $ 432,270 1,535,000 BBB/Baa2 Buckeye Partners LP, 6.05%, 1/15/18 1,590,163 2,900,000 BBB/Baa2 DCP Midstream, 9.75%, 3/15/19 3,568,320 1,150,000 B+/B1 Holly Energy Partners LP, 6.25%, 3/1/15 1,098,250 3,250,000 BBB/Baa2 Kinder Morgan Energy, 5.95%, 2/15/18 3,442,449 1,450,000 BBB-/Baa3 NGPL Pipeco LLC, 6.514%, 12/15/12 (144A) 1,575,983 3,500,000 BBB-/Baa3 Plains All America Pipeline, 6.125%, 1/15/17 3,676,271 3,885,000 BBB+/A3 Questar Pipeline Co., 5.83%, 2/1/18 3,962,464 3,345,000 7.20 BB/Ba1 Southern Union Co., 7.2%, 11/1/66 2,859,975 1,500,000 BBB/Baa2 Spectra Energy Capital LLC, 6.75%, 7/15/18 1,595,078 -------------- $ 23,801,223 -------------- Total Energy $ 53,101,635 - ------------------------------------------------------------------------------------------------------- MATERIALS -- 2.5% Aluminum -- 0.2% 2,290,000 B-/Caa1 Novelis, Inc., 7.25%, 2/15/15 $ 2,181,225 - ------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Semiannual Report | 12/31/09 25 Schedule of Investments | 12/31/09 (unaudited) (continued) - ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount (unaudited) (unaudited) Value - ------------------------------------------------------------------------------------------------------- Commodity Chemicals -- 0.1% $1,700,000 B+/B1 Nova Chemicals Corp., 8.375%, 11/1/16 (144A) $ 1,725,500 - ------------------------------------------------------------------------------------------------------- Construction Materials -- 0.2% 2,260,000 6.64 B-/NR C8 Capital SPV, Ltd., Floating Rate Note, 12/31/49 $ 1,568,011 475,000 BBB/Baa2 Holcim, Ltd., 6.0%, 12/30/19 (144A) 494,423 -------------- $ 2,062,434 - ------------------------------------------------------------------------------------------------------- Diversified Metals & Mining -- 0.9% 1,865,000 BBB/Baa1 Anglo American Capital Plc, 9.375%, 4/8/14 $ 2,237,884 2,965,000 5.88 BBB-/Ba2 Freeport-McMoran Copper & Gold, Inc., Floating Rate Note, 4/1/15 2,948,337 2,725,000 BBB+/Baa1 Rio Tinto Finance Plc, 8.95%, 5/1/14 3,265,370 1,655,000 BB+/Ba2 Teck Resources, Ltd., 10.25%, 5/15/16 (b) 1,928,075 -------------- $ 10,379,666 - ------------------------------------------------------------------------------------------------------- Fertilizers & Agricultural Chemicals -- 0.4% 4,510,000 BBB/Baa2 Agrium, Inc., 6.75%, 1/15/19 $ 4,875,770 45,000 A-/Baa1 Potash Corp. Saskatchewan, 4.875%, 3/1/13 47,528 -------------- $ 4,923,298 - ------------------------------------------------------------------------------------------------------- Specialty Chemicals -- 0.2% 2,400,000 BBB-/Baa3 Cytec Industries, Inc., 8.95%, 7/1/17 $ 2,846,678 - ------------------------------------------------------------------------------------------------------- Steel -- 0.5% 3,900,000 BBB/Baa3 ArcelorMittal, 6.125%, 6/1/18 $ 4,024,160 1,230,000 BBB/Baa2 Commercial Metals Co., 7.35%, 8/15/18 1,311,330 - ------------------------------------------------------------------------------------------------------- $ 5,335,490 -------------- Total Materials $ 29,454,291 - ------------------------------------------------------------------------------------------------------- CAPITAL GOODS -- 2.4% Aerospace & Defense -- 0.3% 40,000 A/A2 Boeing Co., 5.125%, 2/15/13 $ 42,754 3,020,000 BB/Ba2 Esterline Technology, 6.625%, 3/1/17 2,944,500 -------------- $ 2,987,254 - ------------------------------------------------------------------------------------------------------- Building Products -- 0.1% 2,225,000 6.72 B-/BBB- C10 Capital SPV, Ltd., Floating Rate Note, 12/31/49 (b) $ 1,568,269 - ------------------------------------------------------------------------------------------------------- Construction & Farm Machinery & Heavy Trucks -- 0.2% 1,200,000 A/A2 Caterpillar, Inc., 7.9%, 12/15/18 (b) $ 1,463,918 910,000 BBB/Baa3 Cummins, Inc., 6.75%, 2/15/27 875,170 -------------- $ 2,339,088 - ------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 26 Pioneer Bond Fund | Semiannual Report | 12/31/09 - ----------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount (unaudited) (unaudited) Value - ----------------------------------------------------------------------------------------------------- Electrical Component & Equipment -- 0.4% $2,665,000 BB+/Ba2 Anixter International Corp., 5.95%, 3/1/15 $ 2,498,438 2,670,000 B+/Ba2 Belden CDT, Inc., 7.0%, 3/15/17 2,599,913 -------------- $ 5,098,351 - ----------------------------------------------------------------------------------------------------- Industrial Conglomerates -- 0.3% 2,950,000 BBB-/Baa2 Tyco Electronics Group SA, 6.55%, 10/1/17 $ 3,050,185 525,000 BBB+/Baa1 Tyco International Finance SA, 8.5%, 1/15/19 634,068 -------------- $ 3,684,253 - ----------------------------------------------------------------------------------------------------- Industrial Machinery -- 0.2% 2,150,000 BBB+/Baa1 Ingersoll-Rand Global Holding, 9.5%, 4/15/14 $ 2,569,115 - ----------------------------------------------------------------------------------------------------- Trading Companies & Distributors -- 0.9% 495,000 BB-/Ba2 Ace Hardware Corp., 9.125%, 6/1/16 (144A) $ 524,081 5,660,000 BBB+/Baa1 GATX Financial Corp., 6.0%, 2/15/18 (b) 5,331,282 4,160,000 BBB-/Baa2 Glencore Funding LLC, 6.0%, 4/15/14 (144A) 4,255,996 -------------- $ 10,111,359 -------------- Total Capital Goods $ 28,357,689 - ----------------------------------------------------------------------------------------------------- COMMERCIAL SERVICES & SUPPLIES -- 0.3% Office Services & Supplies -- 0.3% 3,110,000 A/A1 Pitney Bowes, Inc., 5.6%, 3/15/18 $ 3,268,041 -------------- Total Commercial Services & Supplies $ 3,268,041 - ----------------------------------------------------------------------------------------------------- TRANSPORTATION -- 1.0% Airlines -- 0.1% 985,332 BBB+/Baa2 Southwest Airlines Co., 7.67%, 1/2/14 $ 1,049,181 - ----------------------------------------------------------------------------------------------------- Railroads -- 0.9% 2,140,000 BBB/Baa1 Burlington Sante Fe Corp., 5.75%, 3/15/18 $ 2,273,215 3,400,000 B+/B2 Kansas City Southern Mexico, 7.625%, 12/1/13 3,349,000 5,125,000 BBB/Baa2 Union Pacific Corp., 5.7%, 8/15/18 5,368,427 -------------- $ 10,990,642 -------------- Total Transportation $ 12,039,823 - ----------------------------------------------------------------------------------------------------- CONSUMER DURABLES & APPAREL -- 0.4% Household Appliances -- 0.4% 4,235,000 BBB-/Baa3 Whirlpool Corp., 5.5%, 3/1/13 $ 4,360,919 -------------- Total Consumer Durables & Apparel $ 4,360,919 - ----------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Semiannual Report | 12/31/09 27 Schedule of Investments | 12/31/09 (unaudited) (continued) - -------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount (unaudited) (unaudited) Value - -------------------------------------------------------------------------------------------------------- CONSUMER SERVICES -- 0.8% Casinos & Gaming -- 0.0% $1,160,000 D/WR Station Casinos, Inc., 6.625%, 3/15/18 $ 5,800 - -------------------------------------------------------------------------------------------------------- Education Services -- 0.7% 2,160,000 AAA/Aaa Leland Stanford Junior University, 4.75%, 5/1/19 $ 2,187,475 2,470,000 AAA/Aaa President & Fellows of Harvard, 3.7%, 4/1/13 2,539,778 3,095,000 AAA/Aaa President & Fellows of Harvard, 6.3%, 10/1/37 3,227,961 -------------- $ 7,955,214 - -------------------------------------------------------------------------------------------------------- Restaurants -- 0.1% 1,200,000 A/A3 McDonald's Corp., 5.35%, 3/1/18 (b) $ 1,286,663 -------------- Total Consumer Services $ 9,247,677 - -------------------------------------------------------------------------------------------------------- MEDIA -- 0.9% Broadcasting -- 0.6% 2,620,000 BBB+/Baa1 Grupo Telivisa SA, 6.0%, 5/15/18 (144A) $ 2,636,346 500,000 BBB+/Baa1 News America, Inc., 5.65%, 8/15/20 (144A) 520,627 4,250,000 B+/B3 Intelsat Subsidiary Holding Co., 8.5%, 1/15/13 4,335,000 -------------- $ 7,491,973 - -------------------------------------------------------------------------------------------------------- Cable & Satellite -- 0.3% 1,600,000 BBB+/Baa1 British Sky Broadcasting, 6.1%, 2/15/18 (144A) $ 1,694,941 135,000 BBB+/Baa1 Comcast Corp., 5.3%, 1/15/14 144,085 800,000 BBB/Baa2 Time Warner Cable, Inc., 8.25%, 4/1/19 952,875 425,000 BBB/Baa2 Time Warner Cable, Inc., 8.75, 2/14/19 517,979 -------------- $ 3,309,880 -------------- Total Media $ 10,801,853 - -------------------------------------------------------------------------------------------------------- RETAILING -- 0.6% General Merchandise Stores -- 0.2% 2,000,000 A+/A2 Target Corp., 5.375%, 5/1/17 $ 2,146,278 - -------------------------------------------------------------------------------------------------------- Internet Retail -- 0.3% 3,000,000 BBB-/Ba1 Expedia, Inc., 8.5%, 7/1/16 (144A) $ 3,243,750 - -------------------------------------------------------------------------------------------------------- Specialty Stores -- 0.1% 1,795,000 B/B3 Sally Holdings LLC, 9.25%, 11/15/14 (144A) (b) $ 1,862,313 -------------- Total Retailing $ 7,252,341 - -------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 28 Pioneer Bond Fund | Semiannual Report | 12/31/09 - ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount (unaudited) (unaudited) Value - ---------------------------------------------------------------------------------------------------- FOOD & DRUG RETAILING -- 0.2% Hypermarkets & Supercenters -- 0.2% $2,000,000 AA/Aa2 Wal-Mart Stores, Inc., 5.875%, 4/5/27 $ 2,096,358 -------------- Total Food & Drug Retailing $ 2,096,358 - ---------------------------------------------------------------------------------------------------- FOOD, BEVERAGE & TOBACCO -- 1.2% Agricultural Products -- 0.3% 3,500,000 A/A2 Cargill, Inc., 5.2%, 1/22/13 (144A) $ 3,711,201 - ---------------------------------------------------------------------------------------------------- Brewers -- 0.3% 2,930,000 BBB+/Baa2 Anheuser-Busch InBev Worldwide, Inc., 7.75% 1/15/19 (144A) $ 3,430,429 55,000 BBB+/Baa1 Miller Brewing Co., 5.5%, 8/15/13 (144A) 58,561 -------------- $ 3,488,990 - ---------------------------------------------------------------------------------------------------- Distillers & Vintners -- 0.3% 2,765,000 BB/Ba3 Constellation Brands, Inc., 8.375%, 12/15/14 $ 2,944,725 - ---------------------------------------------------------------------------------------------------- Packaged Foods & Meats -- 0.1% 1,250,000 BBB+/A3 Kellog Co., 5.125%, 12/3/12 $ 1,356,579 - ---------------------------------------------------------------------------------------------------- Soft Drinks -- 0.1% 55,000 A/A2 Bottling Group LLC, 5.0%, 11/15/13 $ 59,471 1,000,000 A+/Aa2 PepsiCo, Inc., 7.9%, 11/1/18 1,227,255 -------------- $ 1,286,726 - ---------------------------------------------------------------------------------------------------- Tobacco -- 0.1% 1,535,000 BBB/Baa1 UST, Inc., 5.75%, 3/1/18 $ 1,496,907 -------------- Total Food, Beverage & Tobacco $ 14,285,128 - ---------------------------------------------------------------------------------------------------- HOUSEHOLD & PERSONAL PRODUCTS -- 0.1% Household Products -- 0.1% 1,250,000 AA-/Aa3 Procter & Gamble Co., 4.6%, 1/15/14 $ 1,330,970 -------------- Total Household & Personal Products $ 1,330,970 - ---------------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 0.5% Health Care Facilities -- 0.2% 155,885 BB-/B2 HCA, Inc., 9.625%, 11/15/16 $ 168,746 1,050,000 BB/Ba3 HCA, Inc., 7.875%, 2/15/20 1,093,313 385,000 BB/Ba3 HCA, Inc., 8.5%, 4/15/19 414,838 310,000 BB-/B2 HCA, Inc., 9.875%, 2/15/17 342,550 -------------- $ 2,019,447 - ---------------------------------------------------------------------------------------------------- Managed Health Care -- 0.3% 3,275,000 A-/Baa1 United Health Group, 4.875%, 2/15/13 $ 3,426,515 -------------- Total Health Care Equipment & Services $ 5,445,962 - ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Semiannual Report | 12/31/09 29 Schedule of Investments | 12/31/09 (unaudited) (continued) - ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount (unaudited) (unaudited) Value - ---------------------------------------------------------------------------------------------------- PHARMACEUTICALS & BIOTECHNOLOGY -- 0.5% Biotechnology -- 0.5% $ 5,055,000 BBB+/Baa3 Biogen Idec, Inc., 6.0%, 3/1/13 $ 5,368,910 - ---------------------------------------------------------------------------------------------------- Pharmaceuticals -- 0.0% 1,000,000 AA/A1 Abbott Laboratories, Inc., 5.125%, 4/1/19 $ 1,045,968 -------------- Total Pharmaceuticals & Biotechnology $ 6,414,878 - ---------------------------------------------------------------------------------------------------- BANKS -- 4.9% Diversified Banks -- 1.1% 3,515,000 A/Baa1 Barclays Plc, 6.05%, 12/4/17 (b) $ 3,577,223 3,400,000 AA-/Aa2 BNP Paribas, 1.34438%, 4/27/17 3,238,058 3,230,000 A-/Aa3 Credit Agricole SA, 8.375%, 12/13/49 3,423,800 1,855,000 A/A2 Industrial Bank of Korea, 7.125%, 4/23/14 2,074,421 -------------- $ 12,313,502 - ---------------------------------------------------------------------------------------------------- Regional Banks -- 3.8% 1,870,000 BBB+/A2 American Express Bank FSB, 5.5%, 4/16/13 $ 1,993,287 4,500,000 A/Aa3 Branch Banking & Trust Co., 4.875%, 1/15/13 (b) 4,729,352 1,190,000 A/NR Cobank ACB, 7.875%, 4/16/18 (144A) 1,289,397 2,425,000 BBB+/A3 KeyBank NA, 5.8%, 7/1/14 2,360,289 2,030,000 BBB+/Baa1 Keycorp, 6.5%, 5/14/13 2,095,240 2,505,000 A+/Aa3 Mellon Funding Corp., 5.5%, 11/15/18 2,571,052 1,435,000 A/A2 PNC Bank NA, 6.0%, 12/7/17 1,456,714 6,273,000 8.25 BBB/Baa2 PNC Funding Corp., Floating Rate Note, 5/29/49 6,338,733 2,755,000 A-/Baa1 Sovereign Bancorp, 8.75%, 5/30/18 3,183,364 6,670,000 BBB+/A3 State Street Capital, 8.25%, 3/15/42 6,831,481 4,000,000 BBB+/A2 US Bancorp, 6.189%, 4/15/2049 3,215,000 3,520,000 AA-/Aa3 Wachovia Bank NA, 6.0%, 11/15/17 3,684,539 5,470,000 A-/Ba1 Wells Fargo & Co., Floating Rate Note, 12/29/49 5,305,900 -------------- $ 45,054,348 -------------- Total Banks $ 57,367,850 - ---------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 7.4% Asset Management & Custody Banks -- 1.1% 2,000,000 A+/Aa3 Bank of New York, 4.95%, 3/15/15 $ 2,100,732 3,945,000 A-/A3 Eaton Vance Corp., 6.5%, 10/2/17 4,079,517 4,400,000 BB+/Baa3 Janus Capital Group, Inc., 6.95%, 6/15/17 4,147,238 2,800,000 A/A2 State Street Corp., 7.65%, 6/15/10 2,881,488 -------------- $ 13,208,975 - ---------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 30 Pioneer Bond Fund | Semiannual Report | 12/31/09 - ------------------------------------------------------------------------------------------------------ Floating S&P/Moody's Principal Rate (d) Ratings Amount (unaudited) (unaudited) Value - ------------------------------------------------------------------------------------------------------ Consumer Finance -- 2.1% $4,435,000 BB+/B2 American General Finance Corp., 6.9%, 12/15/17 $ 3,079,460 3,875,000 A+/A1 American Honda Finance Corp., 6.7%, 10/1/13 (144A) 4,243,396 3,400,000 BBB/A3 Capital One Bank USA NA, 8.8%, 7/15/19 4,017,668 1,700,000 BB/Baa2 Capital One Capital VI, 8.875%, 5/15/40 1,810,500 2,575,000 A/A2 Caterpillar Financial Corp., 7.05%, 10/1/18 2,947,621 2,630,000 B-/B3 Ford Motor Credit Co., 5.7%, 1/15/10 (b) 2,630,095 3,750,000 AAA/Aaa John Deere Capital Corp., 2.875%, 6/19/12 3,864,285 3,155,000 4.00 BBB-/Ba1 SLM Corp., Floating Rate Note, 7/25/14 2,535,831 -------------- $ 25,128,856 - ------------------------------------------------------------------------------------------------------ Diversified Financial Services -- 1.5% 3,000,000 A-/A3 Bank of America Corp., 7.8%, 2/15/10 $ 3,021,420 1,840,000 BBB/Baa2 Hyundai Capital Services, Inc., 6.0%, 5/5/15 (b) 1,921,262 2,575,000 A+/Aa3 JPMorgan Chase & Co., 6.0%, 1/15/18 2,768,112 1,000,000 A+/Aa3 JPMorgan Chase & Co., 6.3%, 4/23/19 1,100,077 4,900,000 BBB+/Baa1 JPMorgan Chase & Co., 7.9%, 4/29/49 5,054,154 1,100,000 A-/A3 Nationsbank Corp., 7.75%, 8/15/15 1,206,816 976,400 A-/Baa1 PF Export Receivable Master Trust, 6.436%, 6/1/15 (144A) 1,038,011 1,327,767 BBB/Baa2 Power Receivables Finance LLC, 6.29%, 1/1/12 (144A) 1,353,645 -------------- $ 17,463,497 - ------------------------------------------------------------------------------------------------------ Investment Banking & Brokerage -- 1.7% 2,000,000 A/A1 Goldman Sachs, 5.5%, 11/15/14 $ 2,134,702 11,040,000 5.79 BBB/A3 Goldman Sachs Capital, Floating Rate Note, 12/29/49 8,556,000 3,325,000 A/A2 Merrill Lynch & Co., 5.45%, 2/5/13 3,498,801 4,765,000 A/A2 Morgan Stanley Dean Witter & Co., Floating Rate Note, 4/1/18 5,151,766 -------------- $ 19,341,269 - ------------------------------------------------------------------------------------------------------ Specialized Finance -- 1.0% 4,680,000 BBB/Baa3 Cantor Fitzgerald LP, 7.875%, 10/15/19 $ 4,580,105 5,776,002 NR/Ba1 Coso Geothermal Power Holdings LLC, 7.0%, 7/15/26 (144A) 5,111,761 2,000,000 A+/A1 National Rural Utilities Corp., 5.45%, 2/1/18 2,087,006 -------------- $ 11,778,872 -------------- Total Diversified Financials $ 86,921,469 - ------------------------------------------------------------------------------------------------------ The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Semiannual Report | 12/31/09 31 Schedule of Investments | 12/31/09 (unaudited) (continued) - ------------------------------------------------------------------------------------------------------ Floating S&P/Moody's Principal Rate (d) Ratings Amount (unaudited) (unaudited) Value - ------------------------------------------------------------------------------------------------------ INSURANCE -- 3.8% Insurance Brokers -- 0.1% $1,560,000 BB+/B1 Leucadia National Corp., 7.125%, 3/15/17 (144A) $ 1,474,200 - ------------------------------------------------------------------------------------------------------ Life & Health Insurance -- 1.4% 1,690,000 A-/Baa2 Lincoln National Corp., 8.75%, 7/1/19 $ 1,931,001 4,200,000 BBB/Baa2 MetLife, Inc., 10.75%, 8/1/39 5,171,989 4,250,000 A-/Baa2 Protective Life Corp., 7.375%, 10/15/19 4,259,184 2,800,000 A/Baa2 Prudential Financial, Inc., 5.15%, 1/15/13 2,945,544 2,140,000 BBB+/Baa3 Prudential Financial, Inc., 8.875%, 6/15/38 2,268,400 -------------- $ 16,576,118 - ------------------------------------------------------------------------------------------------------ Multi-Line Insurance -- 0.9% 4,620,000 BB/Baa3 Liberty Mutual Group, Inc., 7.0%, 3/15/37 (144A) $ 3,557,751 3,035,000 BBB-/Baa2 Liberty Mutual Group, Inc., 7.3%, 6/15/14 (144A) 3,110,787 650,000 10.75 BB/Baa3 Liberty Mutual Group, Inc., Floating Rate Note, 6/15/58 (144A) 689,000 2,650,000 A/A3 Loews Corp., 5.25%, 3/15/16 (b) 2,691,239 -------------- $ 10,048,777 - ------------------------------------------------------------------------------------------------------ Property & Casualty Insurance -- 0.8% 5,000,000 BBB-/Baa3 Hanover Insurance Group, Inc., 7.625%, 10/15/25 $ 4,600,000 4,135,000 B-/NR Kingsway America, Inc., 7.5%, 2/1/14 2,362,119 2,000,000 A-/A2 Travelers Companies, Inc., 6.25%, 6/15/37 2,114,204 -------------- $ 9,076,323 - ------------------------------------------------------------------------------------------------------ Reinsurance -- 0.6% 2,150,000 AAA/Aa2 Berkshire Hathway, Inc., 5.0%, 8/15/13 $ 2,311,904 5,048,000 BBB+/BBB+ Platinum Underwriters Holdings, Ltd., 7.5%, 6/1/17 5,162,665 -------------- $ 7,474,569 -------------- Total Insurance $ 44,649,987 - ------------------------------------------------------------------------------------------------------ REAL ESTATE -- 3.3% Diversified Real Estate Activities -- 0.5% 4,125,000 A-/A2 WEA Finance LLC, 7.125%, 4/15/18 $ 4,510,019 640,000 A-/A2 WEA Finance LLC, 7.5%, 6/2/14 (144A) 720,189 -------------- $ 5,230,208 - ------------------------------------------------------------------------------------------------------ The accompanying notes are an integral part of these financial statements. 32 Pioneer Bond Fund | Semiannual Report | 12/31/09 - --------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount (unaudited) (unaudited) Value - --------------------------------------------------------------------------------------------------------- Diversified Real Estate Investment Trusts -- 0.5% $ 5,125,000 BBB+/Baa1 Dexus Finance Property, Ltd., 7.125%, 10/15/14 $ 5,266,009 - --------------------------------------------------------------------------------------------------------- Office Real Estate Investment Trusts -- 0.2% 692,000 BBB/Baa2 Mack-Cali Realty LP, 5.125%, 1/15/15 $ 661,396 1,607,000 BBB/Baa2 Mack-Cali Realty LP, 5.125%, 2/15/14 1,529,228 -------------- $ 2,190,624 - --------------------------------------------------------------------------------------------------------- Real Estate Operating Companies -- 0.6% 8,180,000 B-/B3 Forest City Enterprises, Inc., 7.625%, 6/1/15 $ 7,321,100 - --------------------------------------------------------------------------------------------------------- Retail Real Estate Investment Trusts -- 0.3% 3,470,000 AA+/Aa2 Trustreet Properties, Inc., 7.5%, 4/1/15 $ 3,588,372 - --------------------------------------------------------------------------------------------------------- Specialized Real Estate Investment Trusts -- 1.2% 860,000 BBB-/Baa2 Health Care, Inc., 6.0%, 11/15/13 $ 872,522 4,125,000 BBB-/Baa2 Health Care, Inc., 6.2%, 6/1/16 4,009,046 2,425,000 BBB-/Baa3 Healthcare Realty Trust, Inc., 6.5%, 1/17/17 2,402,137 5,325,000 BBB/Baa2 Hospitality Properties Trust, 7.875%, 8/15/14 5,497,360 565,000 BBB-/Ba1 Ventas Realty Capital Corp., 7.125%, 6/1/15 (144A) 565,000 760,000 BBB-/Ba1 Ventas Realty LP, 6.5%, 6/1/16 733,400 540,000 BBB-/Ba1 Ventas Realty LP, 6.75%, 4/1/17 522,450 -------------- $ 14,601,915 -------------- Total Real Estate $ 38,198,228 - --------------------------------------------------------------------------------------------------------- SOFTWARE & SERVICES -- 0.4% Data Processing & Outsourced Services -- 0.2% 3,095,000 B-/Caa1 First Data Corp., 9.875%, 9/24/15 (b) $ 2,886,088 - --------------------------------------------------------------------------------------------------------- Systems Software -- 0.2% 1,800,000 A/A2 Oracle Corp., 5.75%, 4/15/18 $ 1,946,135 -------------- Total Software & Services $ 4,832,223 - --------------------------------------------------------------------------------------------------------- TECHNOLOGY HARDWARE & EQUIPMENT -- 0.8% Computer Hardware -- 0.1% 1,700,000 A/A2 Hewlett-Packard Co., 4.5%, 3/1/13 $ 1,802,277 - --------------------------------------------------------------------------------------------------------- Computer Storage & Peripherals -- 0.1% 855,000 BB+/Ba1 Seagate Technology International Co., Ltd., 10.0%, 5/1/14 $ 944,775 - --------------------------------------------------------------------------------------------------------- Electronic Equipment & Instruments -- 0.5% 5,070,000 BBB-/Ba1 Agilent Technologies, Inc., 6.5%, 11/1/17 $ 5,365,312 - --------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Semiannual Report | 12/31/09 33 Schedule of Investments | 12/31/09 (unaudited) (continued) - ------------------------------------------------------------------------------------------------------ Floating S&P/Moody's Principal Rate (d) Ratings Amount (unaudited) (unaudited) Value - ------------------------------------------------------------------------------------------------------ Electronic Manufacturing Services -- 0.1% $ 1,532,000 BB-/Ba2 Flextronics International, Ltd., 6.5%, 5/15/13 $ 1,535,830 -------------- Total Technology Hardware & Equipment $ 9,648,194 - ------------------------------------------------------------------------------------------------------ SEMICONDUCTORS -- 0.3% Semiconductor Equipment -- 0.3% 3,140,000 BBB/Baa1 Klac Instruments Corp., 6.9%, 5/1/18 $ 3,303,723 -------------- Total Semiconductors $ 3,303,723 - ------------------------------------------------------------------------------------------------------ TELECOMMUNICATION SERVICES -- 0.8% Integrated Telecommunication Services -- 0.8% 1,200,000 A/A2 AT&T, Inc., 5.6%, 5/15/18 $ 1,257,551 1,000,000 A/A2 Bellsouth Capital Funding Corp., 7.75%, 2/15/10 1,007,977 2,530,000 B+/Ba3 Cincinnati Bell, Inc., 8.25%, 10/15/17 2,567,950 1,990,000 BBB-/Baa3 Embarq Corp., 7.082%, 6/1/16 2,198,110 1,805,000 BB/Ba2 Frontier Communications Corp., 8.25%, 5/1/14 1,890,738 -------------- $ 8,922,326 -------------- Total Telecommunication Services $ 8,922,326 - ------------------------------------------------------------------------------------------------------ UTILITIES -- 3.3% Electric Utilities -- 2.4% 1,275,000 BBB+/Baa1 CenterPoint Energy Houston Electric LLC, 7.0%, 3/1/14 $ 1,452,993 980,000 A-/Baa1 Commonwealth Edison Co., 6.15%, 9/15/17 1,061,355 798,020 BBB-/Baa3 Crocket Cogeneration, 5.869%, 3/30/25 (144A) 754,727 3,365,000 A-/A2 Enel Finance International SA, 5.125%, 10/7/19 (144A) 3,385,782 2,270,000 BBB+/Baa1 Entergy Gulf States, Inc., 5.7%, 6/1/15 2,273,178 1,511,748 BBB-/Baa3 FPL Energy America Wind LLC, 6.639%, 6/20/23 (144A) 1,501,468 555,450 BB-/Ba2 FPL Energy Wind Funding LLC, 6.876%, 6/27/17 (144A) 538,787 1,925,000 BBB/Baa2 Israel Electric Corp., 7.25%, 1/15/19 (144A) 2,084,775 610,000 BBB/Baa2 Israel Electric Corp., 9.375%, 1/28/20 (144A) 748,534 910,000 BBB/Baa3 Neveda Power Co., 6.5%, 8/1/18 975,133 5,055,000 BBB+/Baa2 NY State Gas and Electric Corp., 6.15%, 12/15/17 (144A) 5,041,281 1,109,044 NR/WR Orcal Geothermal, 6.21%, 12/30/20 (144A) 1,006,735 The accompanying notes are an integral part of these financial statements. 34 Pioneer Bond Fund | Semiannual Report | 12/31/09 - ----------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount (unaudited) (unaudited) Value - ----------------------------------------------------------------------------------------------------- Electric Utilities -- (continued) $ 2,690,000 BB+/Baa3 Public Service of New Mexico, 7.95%, 5/15/18 2,815,889 3,550,000 BBB+/Baa1 West Penn Power Co., 5.95%, 12/15/17 3,630,230 ------------- $ 27,270,867 - ----------------------------------------------------------------------------------------------------- Gas Utilities -- 0.2% 2,450,000 A/Aa3 Nakilat, Inc., 6.267%, 12/31/33 (144A) $ 2,171,068 - ----------------------------------------------------------------------------------------------------- Independent Power Producer & Energy Traders -- 0.6% 2,675,000 BB-/Ba3 Intergen NV, 9.0%, 6/30/17 $ 2,788,688 2,105,000 BBB-/Baa3 Kiowa Power Partners LLC, 5.737%, 3/20/21 (144A) 1,985,436 2,610,000 BBB-/Baa3 Panoche Energy Center LLC, 6.88%, 7/31/29 (144A) 2,411,040 -------------- $ 7,185,164 - ----------------------------------------------------------------------------------------------------- Multi-Utilities -- 0.1% 1,365,000 BB/Ba2 NSG Holdings, Inc., 7.75%, 12/15/25 $ 1,221,675 431,965 NR/NR Ormat Funding Corp., 8.25%, 12/30/20 389,848 -------------- $ 1,611,523 -------------- Total Utilities $ 38,238,622 - ----------------------------------------------------------------------------------------------------- TOTAL CORPORATE BONDS (Cost $453,322,299) $ 479,540,187 - ----------------------------------------------------------------------------------------------------- U.S. GOVERNMENT AGENCY OBLIGATIONS -- 30.0% 17,533,731 AAA/Aaa Federal Home Loan Mortgage Corp., 4.5%, 11/1/18 - 4/1/22 $ 18,165,293 12,800,781 AAA/Aaa Federal Home Loan Mortgage Corp., 5.0%, 10/1/20 - 6/1/35 13,373,232 7,274,981 AAA/Aaa Federal Home Loan Mortgage Corp., 5.5%, 12/1/18 - 11/1/35 7,667,981 3,000,000 AAA/Aaa Federal Home Loan Mortgage Corp., 5.75%, 1/15/12 3,265,917 18,295,357 AAA/Aaa Federal Home Loan Mortgage Corp., 6.0%, 5/1/17 - 6/1/35 19,512,653 1,285,918 AAA/Aaa Federal Home Loan Mortgage Corp., 6.5%, 3/1/13 - 4/1/34 1,385,651 1,094,523 AAA/Aaa Federal Home Loan Mortgage Corp., 7.0%, 8/1/22 - 11/1/30 1,172,876 4,892 AAA/Aaa Federal Home Loan Mortgage Corp., 8.0%, 8/1/31 5,292 3,873,839 AAA/Aaa Federal National Mortgage Association, 4.0%, 7/1/18 - 3/1/36 3,852,567 13,582,239 AAA/Aaa Federal National Mortgage Association, 4.5%, 4/1/19 - 3/1/37 13,935,771 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Semiannual Report | 12/31/09 35 Schedule of Investments | 12/31/09 (unaudited) (continued) - ---------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount (unaudited) (unaudited) Value - ---------------------------------------------------------------------------------------------------- U.S. Government Agency Obligations -- (continued) $ 9,776,023 AAA/Aaa Federal National Mortgage Association, 5.0%, 12/1/17 - 2/1/36 $ 10,224,855 21,733,709 AAA/Aaa Federal National Mortgage Association, 5.5%, 9/1/17 - 6/1/36 22,895,614 22,911,406 AAA/Aaa Federal National Mortgage Association, 6.0%, 6/1/16 - 9/1/38 24,407,563 1,724,043 AAA/Aaa Federal National Mortgage Association, 6.5%, 7/1/29 - 7/1/34 1,863,260 798,388 AAA/Aaa Federal National Mortgage Association, 7.0%, 3/1/12 - 1/1/32 872,492 5,044 AAA/Aaa Federal National Mortgage Association, 7.5%, 8/1/20 - 4/1/30 5,698 41,262 AAA/Aaa Federal National Mortgage Association, 8.0%, 4/1/20 - 5/1/31 47,361 11,867,520 AAA/Aaa Government National Mortgage Association, 4.5%, 7/15/33 - 4/15/38 11,932,429 2,885,453 AAA/Aaa Government National Mortgage Association, 5.0%, 10/15/18 - 4/15/35 3,002,892 19,897,637 AAA/Aaa Government National Mortgage Association, 5.5%, 10/15/17 - 2/15/37 21,051,232 19,395,304 AAA/Aaa Government National Mortgage Association, 6.0%, 4/15/13 - 10/15/36 20,641,685 9,146,122 AAA/Aaa Government National Mortgage Association, 6.5%, 8/15/11 - 7/15/35 9,845,279 1,258,866 AAA/Aaa Government National Mortgage Association, 7.0%, 12/15/13 - 10/15/31 1,398,794 154,657 AAA/Aaa Government National Mortgage Association, 7.5%, 8/15/11 - 12/15/31 174,091 9,907 AAA/Aaa Government National Mortgage Association, 7.75%, 2/15/30 11,308 3,355 AAA/Aaa Government National Mortgage Association, 8.0%, 5/15/10 3,441 303,323 AAA/Aaa Government National Mortgage Association I, 6.0%, 2/15/29 324,033 84,002 AAA/Aaa Government National Mortgage Association I, 7.0%, 12/15/30 - 3/15/31 93,550 17,922 AAA/Aaa Government National Mortgage Association I, 7.5%, 10/15/29 20,184 2,102,325 AAA/Aaa Government National Mortgage Association II, 4.5%, 12/20/34 - 1/20/35 2,112,497 1,837,434 AAA/Aaa Government National Mortgage Association II, 5.5%, 10/20/19 - 11/20/34 1,942,157 The accompanying notes are an integral part of these financial statements. 36 Pioneer Bond Fund | Semiannual Report | 12/31/09 - ------------------------------------------------------------------------------------------------------ Floating S&P/Moody's Principal Rate (d) Ratings Amount (unaudited) (unaudited) Value - ------------------------------------------------------------------------------------------------------ U.S. Government Agency Obligations -- (continued) $ 98,224 AAA/Aaa Government National Mortgage Association II, 6.5%, 2/20/29 - 4/20/29 $ 106,497 437,076 AAA/Aaa Government National Mortgage Association II, 7.0%, 11/20/28 - 12/20/30 485,052 6,980,000 NR/Aaa U.S. Treasury Bonds, 0.875%, 1/31/11 7,001,813 22,500,000 AAA/Aaa U.S. Treasury Bonds, 2.75%, 2/15/19 20,714,061 11,420,000 AAA/Aaa U.S. Treasury Bonds, 3.875%, 5/15/18 11,595,765 6,980,000 AAA/Aaa U.S. Treasury Bonds, 4.5%, 11/15/10 7,222,939 5,100,000 AAA/Aaa U.S. Treasury Bonds, 5.25%, 11/15/28 5,526,329 4,750,000 AAA/Aaa U.S. Treasury Bonds, 6.25%, 8/15/23 5,673,281 3,509,760 AAA/Aaa U.S. Treasury Inflation Notes, 2.0%, 1/15/14 3,711,571 9,750,000 AAA/Aaa U.S. Treasury Notes, 0.75%, 11/30/11 9,686,401 6,980,000 AAA/Aaa U.S. Treasury Notes, 0.875%, 2/28/11 6,996,906 6,980,000 AAA/Aaa U.S. Treasury Notes, 1.25%, 11/30/10 7,029,076 6,380,000 AAA/Aaa U.S. Treasury Notes, 3.125%, 5/15/19 (b) 6,042,058 2,500,000 AAA/Aaa U.S. Treasury Notes, 3.625%, 8/15/19 (b) 2,457,813 7,620,000 AAA/Aaa U.S. Treasury Notes, 4.25%, 5/15/39 7,148,513 5,450,000 AAA/Aaa U.S. Treasury Notes, 4.375%, 2/15/38 5,232,000 7,340,000 AAA/Aaa U.S. Treasury Notes, 4.5%, 2/15/36 7,229,900 8,435,000 AAA/Aaa U.S. Treasury Notes, 4.5%, 5/15/38 (b) 8,259,712 12,878,000 AAA/Aaa U.S. Treasury Notes, 4.5%, 8/15/39 12,586,236 840,000 AAA/Aaa U.S. Treasury Notes, 5.5%, 8/15/28 936,075 450,000 AAA/Aaa U.S. Treasury Notes, 7.875%, 2/15/21 604,828 -------------- $ 351,454,474 - ------------------------------------------------------------------------------------------------------ TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS (Cost $344,326,833) $ 351,454,474 - ------------------------------------------------------------------------------------------------------ FOREIGN GOVERNMENT BOND -- 0.1% BANKS -- 0.1% Diversified Banks -- 0.1% 625,000 A/A2 Bank of Korea Export-Import, 5.875%, 1/14/15 $ 670,695 - ------------------------------------------------------------------------------------------------------ TOTAL FOREIGN GOVERNMENT BONDS (Cost $621,671) $ 670,695 - ------------------------------------------------------------------------------------------------------ The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Semiannual Report | 12/31/09 37 Schedule of Investments | 12/31/09 (unaudited) (continued) - ------------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount (unaudited) (unaudited) Value - ------------------------------------------------------------------------------------------------------------- MUNICIPAL BONDS -- 0.8% Municipal Higher Education -- 0.8% $ 4,380,000 AAA/Aa3 California State University Revenue, 5.0%, 11/1/39 $ 4,346,143 4,600,000 AAA/Aaa Connecticut State Health & Education, 5.0%, 7/1/42 4,818,086 -------------- $ 9,164,229 - ------------------------------------------------------------------------------------------------------------- TOTAL MUNICIPAL BONDS (Cost $8,818,679) $ 9,164,229 - ------------------------------------------------------------------------------------------------------------- SENIOR FLOATING RATE LOAN INTERESTS -- 6.6%** ENERGY -- 0.3% Oil & Gas Equipment & Services -- 0.1% 1,777,500 8.00 B+/Ba3 Hudson Products Holdings, Inc., Term Loan, 8/24/15 $ 1,404,225 - ------------------------------------------------------------------------------------------------------------- Oil & Gas Refining & Marketing -- 0.2% 1,750,000 0.00 BBB-/Ba2 Pilot Travel Centers LLC, Initial Tranche B Loan, 11/24/15 $ 1,763,554 -------------- Total Energy $ 3,167,779 - ------------------------------------------------------------------------------------------------------------- MATERIALS -- 0.5% Diversified Chemical -- 0.1% 1,097,983 7.65 BB+/Ba1 Ashland, Inc., Term B Borrowing Loan, 5/13/14 $ 1,116,375 - ------------------------------------------------------------------------------------------------------------- Paper Packaging -- 0.4% 211,001 2.50 B+/B2 Graham Packaging Co., Term B Loan, 10/7/11 $ 208,100 2,111,766 6.75 B+/B2 Graham Packaging Co., Term C Loan, 4/5/14 2,130,536 2,631,148 3.03 BB/Ba2 Graphic Packaging International, Inc., Incremental Term Loan, 5/16/14 2,565,369 -------------- $ 4,904,005 -------------- Total Materials $ 6,020,380 - ------------------------------------------------------------------------------------------------------------- CAPITAL GOODS -- 0.6% Aerospace & Defense -- 0.4% 3,995,370 3.56 B+/Ba3 Aeroflex, Inc., Tranche B1 Term Loan, 8/15/14 $ 3,669,088 164,282 4.04 BB-/B1 DAE Aviation Holdings, Inc., Tranche B1 Term Loan, 7/31/14 151,961 160,308 4.03 BB-/B1 Standard Aero, Ltd., Tranche B2 Term Loan, 7/31/14 148,285 131,250 5.50 BB/Ba2 TASC, Inc., Tranche A Term Loan, 12/18/14 131,797 The accompanying notes are an integral part of these financial statements. 38 Pioneer Bond Fund | Semiannual Report | 12/31/09 - ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount (unaudited) (unaudited) Value - ------------------------------------------------------------------------------------------------------- Aerospace & Defense -- (continued) $ 243,750 5.75 BB/Ba2 TASC, Inc., Tranche B Term Loan, 12/18/15 $ 245,324 -------------- $ 4,346,455 - ------------------------------------------------------------------------------------------------------- Construction & Farm Machinery & Heavy Trucks -- 0.2% 912,849 10.00 D/Caa1 Accuride Corp., Term Advance Loan, 1/31/12 $ 913,324 1,509,266 6.27 BB-/B2 Oshkosh Corp., Term B Loan, 12/6/13 1,510,964 -------------- $ 2,424,288 -------------- Total Capital Goods $ 6,770,743 - ------------------------------------------------------------------------------------------------------- COMMERCIAL SERVICES & SUPPLIES -- 0.2% Environmental & Facilities Services -- 0.2% 300,000 0.00 B+/Ba3 Advanced Disposal Services, Inc., Term B Loan, 12/23/14 $ 297,000 2,939,698 2.23 D/B2 Synagro Technologies, Inc., 1st Lien Term Loan, 4/2/14 2,425,251 -------------- $ 2,722,251 -------------- Total Commercial Services & Supplies $ 2,722,251 - ------------------------------------------------------------------------------------------------------- TRANSPORTATION -- 0.2% Air Freight & Couriers -- 0.1% 426,630 3.28 B/Ba2 Ceva Group Plc, Additional Pre-funded Term Loan, 11/4/13 $ 359,791 199,859 3.25 B-/B1 Ceva Group Plc, EGL Term Loan, 11/4/13 170,380 1,197,871 3.24 NR/Ba2 Ceva Group Plc, U.S. Term Loan, 11/4/13 1,007,210 -------------- $ 1,537,381 - ------------------------------------------------------------------------------------------------------- Marine -- 0.1% 790,625 3.51 BB-/Ba3 Horizon Lines, Inc., Term Loan, 8/8/12 $ 652,266 -------------- Total Transportation $ 2,189,647 - ------------------------------------------------------------------------------------------------------- AUTOMOBILES & COMPONENTS -- 0.8% Auto Parts & Equipment -- 0.4% 4,181,250 7.50 BB-/Ca Lear Corp., Closing Date Term Loan, 10/15/14 $ 4,209,124 - ------------------------------------------------------------------------------------------------------- Automobile Manufacturers -- 0.1% 1,036,425 3.29 B-/Ba3 Ford Motor Co., Tranche B1 Term Loan, 12/15/13 $ 963,011 - ------------------------------------------------------------------------------------------------------- Tires & Rubber -- 0.3% 4,190,000 2.34 BB/Ba1 Goodyear Tire & Rubber Co., 2nd Lien Term Loan, 4/30/14 $ 3,888,844 -------------- Total Automobiles & Components $ 9,060,979 - ------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Semiannual Report | 12/31/09 39 Schedule of Investments | 12/31/09 (unaudited) (continued) - --------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount (unaudited) (unaudited) Value - --------------------------------------------------------------------------------------------------------- CONSUMER DURABLES & APPAREL -- 0.1% Housewares & Specialties -- 0.1% $ 1,000,992 2.75 BB-/Ba2 Jarden Corp., Term B3 Loan, 1/24/12 $ 977,576 -------------- Total Consumer Durables & Apparel $ 977,576 - --------------------------------------------------------------------------------------------------------- CONSUMER SERVICES -- 0.2% Casinos & Gaming -- 0.2% 654,059 6.00 CCC/B3 Fontainebleau Las Vegas, Delayed Draw Term Loan, 6/6/14 $ 239,822 1,308,118 6.00 NA/NA Fontainebleau Las Vegas, Initial Term Loan, 6/6/14 479,644 393,153 2.79 BB-/Ba3 Gateway Casinos & Entertainment, Delayed Draw Term Loan, 9/30/14 327,300 1,941,067 2.79 BB-/Ba3 Gateway Casinos & Entertainment, Term Advance Loan, 9/30/14 $ 1,615,939 -------------- $ 2,662,705 -------------- Total Consumer Services $ 2,662,705 - --------------------------------------------------------------------------------------------------------- MEDIA -- 0.5% Broadcasting -- 0.2% 3,300,000 2.50 B-/Baa2 Univision Communication, Inc., Initial Term Loan, 9/29/14 $ 2,879,250 - --------------------------------------------------------------------------------------------------------- Cable & Satellite -- 0.3% 2,200,000 2.26 B+/B1 Charter Communications, Inc., New Term Loan, 3/5/14 $ 2,067,084 946,575 2.48 B/B1 Knology, Inc., Term Loan, 6/30/12 905,556 631,160 2.77 CCC/B2 WideOpenWest LLC, 1st Lien Term Loan, 6/30/14 583,297 -------------- $ 3,555,937 -------------- Total Media $ 6,435,187 - --------------------------------------------------------------------------------------------------------- RETAILING -- 0.1% Internet Retail -- 0.1% 1,319,200 3.51 BBB-/Ba1 Ticketmaster Corp., Term B Loan, 7/25/14 $ 1,312,604 -------------- Total Retailing $ 1,312,604 - --------------------------------------------------------------------------------------------------------- HOUSEHOLD & PERSONAL PRODUCTS -- 0.1% Household Products -- 0.1% 699,681 8.00 B-/B3 Spectrum Brands, Inc., Dollar Term B Loan, 3/30/13 $ 694,215 36,077 8.00 B-/B3 Spectrum Brands, Inc., Letter of Credit Loan, 3/30/13 35,795 -------------- $ 730,010 -------------- Total Household & Personal Products $ 730,010 - --------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 40 Pioneer Bond Fund | Semiannual Report | 12/31/09 - ------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount (unaudited) (unaudited) Value - ------------------------------------------------------------------------------------------------------- HEALTH CARE EQUIPMENT & SERVICES -- 1.0% Health Care Facilities -- 0.5% $ 96,086 2.51 BB-/Ba3 CHS/Community Health Systems, Inc., Delayed Draw Term Loan, 7/25/14 $ 90,828 1,879,915 2.51 BB-/Ba3 CHS/Community Health Systems, Inc., Funded Term Loan, 7/25/14 1,777,042 2,147,021 2.50 B+/Ba2 HCA, Inc., Tranche B1 Term Loan, 11/18/13 2,054,968 589,022 2.02 B+/Ba2 Psychiatric Solutions, Inc., Term Loan, 7/2/12 559,277 1,261,132 2.40 B+/Ba2 Sun Health Care Group, Inc., Term Loan, 4/19/14 1,187,434 265,517 2.28 B+/Ba2 Sun Health Care Group, Inc., Synthetic LC Loan, 4/19/14 250,001 -------------- $ 5,919,550 - ------------------------------------------------------------------------------------------------------- Health Care Services -- 0.2% 2,800,988 2.48 BB-/Ba3 Catalent Pharma Solutions, Inc., Dollar Term Loan, 4/10/14 $ 2,391,344 - ------------------------------------------------------------------------------------------------------- Health Care Supplies -- 0.3% 2,248,835 3.50 BB-/B1 Bausch & Lomb, Inc., Parent Term Loan, 4/24/15 $ 2,146,934 546,112 3.50 BB-/B1 Bausch & Lomb, Inc., Delayed Draw Term Loan, 4/24/15 521,366 1,181,790 3.25 BB/Ba2 Biomet, Inc., Dollar Term Loan, 3/25/15 1,132,698 -------------- $ 3,800,998 -------------- Total Health Care Equipment & Services $ 12,111,892 - ------------------------------------------------------------------------------------------------------- PHARMACEUTICALS & BIOTECHNOLOGY -- 0.3% Biotechnology -- 0.2% 738,983 5.50 BB+/B1 Warner Chilcott Corp., Term A Loan, 10/30/14 $ 741,461 369,492 5.75 BB+/B1 Warner Chilcott Corp., Term B1 Loan, 4/30/15 370,730 812,881 5.75 BB+/B1 Warner Chilcott Corp., Term B2 Loan, 4/30/15 815,607 915,000 5.75 NR/B1 Warner Chilcott Corp., Term B3 Loan, 4/30/15 916,716 -------------- $ 2,844,514 - ------------------------------------------------------------------------------------------------------- Life Sciences Tools & Services -- 0.1% 674,625 5.25 BBB-/Baa3 Life Technologies Corp., Term B Facility Loan, 11/23/15 $ 679,966 -------------- Total Pharmaceuticals & Biotechnology $ 3,524,480 - ------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Semiannual Report | 12/31/09 41 Schedule of Investments | 12/31/09 (unaudited) (continued) - --------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount (unaudited) (unaudited) Value - --------------------------------------------------------------------------------------------------------- DIVERSIFIED FINANCIALS -- 0.2% Diversified Financial Services -- 0.2% $ 2,431,639 3.53 BB/Ba1 Metavante Corp., Term Loan, 11/3/14 $ 2,416,442 -------------- Total Diversified Financials $ 2,416,442 - --------------------------------------------------------------------------------------------------------- SOFTWARE & SERVICES -- 0.3% Data Processing & Outsourced Services -- 0.1% 666,452 4.48 BB+/Ba1 Fidelity National Information, Tranche C Term Loan, 1/18/12 $ 667,285 - --------------------------------------------------------------------------------------------------------- IT Consulting & Other Services -- 0.2% 2,400,505 1.99 BB/Ba3 Sungard Data Systems, Inc., Tranche A U.S. Term Loan, 2/28/14 $ 2,276,353 - --------------------------------------------------------------------------------------------------------- Systems Software -- 0.0% 392,641 6.00 B+/Ba2 Rovi Corp., Term Loan, 5/2/13 $ 394,604 -------------- Total Software & Services $ 3,338,242 - --------------------------------------------------------------------------------------------------------- TECHNOLOGY HARDWARE & EQUIPMENT -- 0.2% Electronic Components -- 0.2% 507,630 2.53 BB-/Ba1 Flextronics Semiconductor, A1A Delayed Draw Term Loan, 10/1/14 $ 471,991 1,766,553 2.51 BB-/Ba1 Flextronics Semiconductor, A Closing Date Loan, 10/1/14 1,642,527 -------------- $ 2,114,518 - --------------------------------------------------------------------------------------------------------- Electronic Equipment & Instruments -- 0.0% 397,222 3.64 BB/Ba2 Huawei-3Com Co., Ltd., Tranche B Term Loan, 9/28/12 $ 382,657 -------------- Total Technology Hardware & Equipment $ 2,497,175 - --------------------------------------------------------------------------------------------------------- TELECOMMUNICATION SERVICES -- 0.4% Alternative Carriers -- 0.0% 659,466 2.73 B/Caa1 PAETEC Holding Corp., Replacement Term Loan, 2/28/13 $ 630,203 - --------------------------------------------------------------------------------------------------------- Integrated Telecommunication Services -- 0.3% 2,991,531 3.24 B+/B2 Telesat Canada, Inc., U.S. Term I Loan, 10/31/14 $ 2,867,061 256,954 3.24 B+/B2 Telesat Canada, Inc., U.S. Term II Loan, 10/31/14 246,263 423,907 1.99 B/B1 Time Warner Telecom, Inc., Term B Loan, 1/7/13 407,481 -------------- $ 3,520,805 - --------------------------------------------------------------------------------------------------------- Wireless Telecommunication Services -- 0.1% 1,180,000 3.23 BB-/B3 Intelsat Jackson Holdings, Ltd., Term Loan, 2/1/14 $ 1,073,800 -------------- Total Telecommunication Services $ 5,224,808 - --------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 42 Pioneer Bond Fund | Semiannual Report | 12/31/09 - ---------------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount (unaudited) (unaudited) Value - ---------------------------------------------------------------------------------------------------------- UTILITIES -- 0.6% Electric Utilities -- 0.3% $ 399,000 3.73 B+/B2 Texas Competitive Electric Holdings, Delayed Draw Term Loan, 10/10/14 $ 321,395 3,376,467 3.73 B+/Ba3 Texas Competitive Electric Holdings, Initial Tranche B2 Loan, 10/10/14 2,758,151 -------------- $ 3,079,546 - ---------------------------------------------------------------------------------------------------------- Independent Power Producer & Energy Traders -- 0.3% 3,796,109 3.14 B+/B2 Calpine Corp., 1st Priority Term Loan, 3/29/14 $ 3,598,711 -------------- Total Utilities $ 6,678,257 - ---------------------------------------------------------------------------------------------------------- TOTAL SENIOR FLOATING RATE LOAN INTERESTS (Cost $80,214,808) $ 77,841,157 - ---------------------------------------------------------------------------------------------------------- RIGHTS/WARRANTS -- 0.1% AUTOMOBILES & COMPONENTS -- 0.1% Auto Parts & Equipment -- 0.1% 12,758 Lear Corp. Warrants* $ 806,306 -------------- Total Automobiles & Components $ 806,306 - ---------------------------------------------------------------------------------------------------------- TOTAL RIGHTS/WARRANTS (Cost $589,028) $ 806,306 - ---------------------------------------------------------------------------------------------------------- TEMPORARY CASH INVESTMENTS -- 5.2% Repurchase Agreement -- 2.3% 26,725,000 Deutsche Bank, 0.01%, dated 12/31/09, repurchase price of $26,725,000 plus accrued interest on 1/4/10 collateralized by $27,259,500 Federal National Mortgage Association, 4.5 - 7.0%, 9/1/23 - 12/1/38 $ 26,725,000 - ---------------------------------------------------------------------------------------------------------- SECURITIES LENDING COLLATERAL -- 2.9% (c) Certificates of Deposit: 1,011,691 Bank of Nova Scotia, 0.19%, 2/17/10 $ 1,011,691 1,011,691 DnB NOR Bank ASA NY, 0.2%, 2/17/10 1,011,691 368,289 Nordea Bank Finland, 0.19%, 1/28/10 368,289 919,741 Svenska NY, 0.20%, 3/30/10 919,741 1,103,663 Rabobank Nederland NY, 0.19%, 3/2/10 1,103,663 98,651 Westpac Banking NY, 1.35%, 3/19/10 98,651 919,719 Societe Generale, 0.21%, 3/4/10 919,719 1,011,691 CBA Financial, 0.27%, 1/3/11 1,011,691 280,137 BNP Paribas, 0.78%, 6/4/10 280,137 653,373 Wachovia Bank NA, 1.17%, 5/14/10 653,373 -------------- $ 7,378,646 - ---------------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Semiannual Report | 12/31/09 43 Schedule of Investments | 12/31/09 (unaudited) (continued) - ----------------------------------------------------------------------------------------------------- Floating S&P/Moody's Principal Rate (d) Ratings Amount (unaudited) (unaudited) Value - ----------------------------------------------------------------------------------------------------- Commercial Paper: $ 735,340 BBVA London, 0.28%, 3/18/10 $ 735,340 197,385 US Bancorp, 0.26%, 5/6/10 197,385 185,259 American Honda Finance, 0.22%, 2/5/10 185,259 276,159 GE Capital Corp., 0.45%, 8/20/10 276,159 99,563 GE Capital Corp., 0.38%, 10/21/10 99,563 100,230 GE Capital Corp., 0.34%, 10/6/10 100,230 735,554 HND AF, 0.18%, 3/2/10 735,554 1,011,415 HSBC, 0.20%, 2/19/10 1,011,415 102,587 John Deer Capital Corp., 0.36%, 7/6/10 102,587 779,015 JPMorgan Chase & Co., 0.57%, 9/24/10 779,015 919,407 NABPP, 0.19%, 3/8/10 919,407 716,843 PARFIN, 0.25%, 4/19/10 716,843 919,346 Cafco, 0.20%, 3/15/10 919,346 1,011,372 Char FD, 0.18%, 3/5/10 1,011,372 918,786 WSTPAC, 0.25%, 5/27/10 918,786 551,629 Ciesco, 0.20%, 3/8/10 551,629 459,737 Ciesco, 0.20%, 2/18/10 459,737 919,536 Fasco, 0.17%, 2/12/10 919,536 460,508 Kithaw, 0.21%, 3/2/10 460,508 471,732 Kithaw, 0.20%, 2/23/10 471,732 631,578 Old LLC, 0.19%, 3/17/10 631,578 257,902 Old LLC, 0.18%, 2/17/10 257,902 313,980 Ranger, 0.20%, 3/12/10 313,980 312,650 SRCPP, 0.19%, 2/3/10 312,650 643,667 SRCPP, 0.19%, 2/10/10 643,667 275,676 TB LLC, 0.19%, 2/8/10 275,676 505,567 TB LLC, 0.20%, 3/5/10 505,567 184,037 TB LLC, 0.10%, 2/9/10 184,037 1,049,422 Bank of America, 0.87%, 5/12/10 1,049,422 183,970 BBVA Senior US, 0.30%, 3/12/10 183,970 1,042,977 Santander, 0.33%, 7/23/10 1,042,977 367,753 WFC, 0.49%, 8/20/10 367,753 -------------- $ 17,340,582 - ----------------------------------------------------------------------------------------------------- Tri-party Repurchase Agreements: 3,678,875 Deutsche Bank, 0.01%, 1/4/10 $ 3,678,875 1,839,438 JPMorgan, 0.0%, 1/4/10 1,839,438 2,485,172 Barclays Capital Markets, 0.0%, 1/4/10 2,485,172 -------------- $ 8,003,485 - ----------------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 44 Pioneer Bond Fund | Semiannual Report | 12/31/09 - ----------------------------------------------------------------------------------------------------- Floating S&P/Moody's Rate (d) Ratings Shares (unaudited) (unaudited) Value - ----------------------------------------------------------------------------------------------------- Money Market Mutual Funds: 735,775 Dreyfus Preferred Money Market Fund $ 735,775 735,775 Blackrock Liquidity Temporary Cash Fund 735,775 -------------- $ 1,471,550 -------------- Total Securities Lending Collateral $ 34,194,263 - ----------------------------------------------------------------------------------------------------- TOTAL TEMPORARY CASH INVESTMENTS (Cost $60,919,263) $ 60,919,263 - ----------------------------------------------------------------------------------------------------- TOTAL INVESTMENT IN SECURITIES -- 101.6% (Cost $1,178,038,838) (a) $1,189,645,742 - ----------------------------------------------------------------------------------------------------- OTHER ASSETS AND LIABILITIES -- (1.6)% $ (18,800,509) - ----------------------------------------------------------------------------------------------------- TOTAL NET ASSETS -- 100.0% $1,170,845,233 ===================================================================================================== * 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 December 31, 2009, the value of these securities amounted to $80,956,587 or 6.9% 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 United States 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 December 31, 2009, the net unrealized gain on investments based on cost for federal income tax purposes of $1,176,137,234 was as follows: Aggregate gross unrealized gain for all investments in which there is an excess of value over tax cost $56,026,457 Aggregate gross unrealized loss for all investments in which there is an excess of tax cost over value (42,517,949) ----------- Net unrealized gain $13,508,508 =========== The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Semiannual Report | 12/31/09 45 Schedule of Investments | 12/31/09 (unaudited) (continued) (b) At December 31, 2009, the following securities were out on loan: Principal Amount Security Value $ 1,126,000 Barclays Plc, 6.05%, 12/4/17 $ 1,148,520 4,455,000 Branch Banking & Trust Co., 4.875%, 1/15/13 4,677,750 1,320,000 C10 Capital SPV, Ltd., Floating Rate Note, 12/31/49 924,000 1,000,000 Caterpillar, Inc., 7.9%, 12/15/18 1,220,000 57,000 Chesapeake Energy Corp., 9.5%, 2/15/15 62,700 366,000 First Data Corp., 9.875%, 9/24/15 340,380 1,500,000 Ford Motor Credit Co., 5.7%, 1/15/10 1,500,000 719,000 GATX Financial Corp., 6.0%, 2/15/18 675,860 1,777,000 Hyundai Capital Services, Inc., 6.0%, 5/5/15 1,848,080 2,400,000 Loews Corp., 5.25%, 3/15/16 2,448,000 1,100,000 McDonald's Corp., 5.35%, 3/1/18 1,177,000 1,739,000 Sally Holdings, 9.25%, 11/15/14 (144A) 1,808,560 16,000 Teck Resources, Ltd., 10.25%, 5/15/16 18,720 5,000,000 U.S. Treasury Notes, 3.125%, 5/15/19 4,750,000 2,436,000 U.S. Treasury Notes, 3.625%, 8/15/19 2,387,280 8,200,000 U.S. Treasury Notes, 4.5%, 5/15/38 8,036,000 - ---------------------------------------------------------------------------------------- Total $33,022,850 ========================================================================================= (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. Purchases and sales of securities (excluding temporary cash investments) for the six months ended December 31, 2009 were as follows: - -------------------------------------------------------------------------------- Purchases Sales - -------------------------------------------------------------------------------- Long-Term U.S. Government $120,403,515 $144,634,570 Other Long-Term Securities $149,466,622 $ 61,228,863 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 accompanying notes are an integral part of these financial statements. 46 Pioneer Bond Fund | Semiannual Report | 12/31/09 The following is a summary of the inputs used as of December 31, 2009, in valuing the Fund's assets: - -------------------------------------------------------------------------------------------------- Level 1 Level 2 Level 3 Total - -------------------------------------------------------------------------------------------------- Convertible Corporate Bonds $ -- $ 8,570,201 $ -- $ 8,570,201 Preferred Stocks 7,032,040 -- -- 7,032,040 Common Stock 1,524,741 -- -- 1,524,741 Asset Backed Securities -- 38,006,058 -- 38,006,058 Collateralized Mortgage Obligations -- 153,921,807 194,584 154,116,391 Corporate Bonds -- 479,540,187 -- 479,540,187 U.S. Government Agency Obligations -- 351,454,474 -- 351,454,474 Foreign Government Bonds -- 670,695 -- 670,695 Municipal Bonds -- 9,164,229 -- 9,164,229 Senior Floating Rate Loan Interests -- 77,841,157 -- 77,841,157 Rights/Warrants -- 806,306 -- 806,306 Temporary Cash Investments -- 59,447,713 -- 59,447,713 Money Market Mutual Funds 1,471,550 -- -- 1,471,550 - -------------------------------------------------------------------------------------------------- Total $10,028,331 $1,179,422,827 $194,584 $1,189,645,742 ================================================================================================== Following is a reconciliation of assets using significant unobservable inputs (Level 3): - ---------------------------------------------------------------------------------------------- Collateralized Asset Backed Mortgage Securities Obligations - ---------------------------------------------------------------------------------------------- Balance as of 6/30/09 $ 3,070,286 $132,478 Realized gain (loss)1 1,483 -- Change in unrealized appreciation (depreciation)2 (833,562) 62,106 Net purchases (sales) (66,376) -- Transfers in and out of Level 3 (2,171,831) -- - ---------------------------------------------------------------------------------------------- Balance as of 12/31/09 $ -- $194,584 ============================================================================================== 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 | Semiannual Report | 12/31/09 47 Statement of Assets and Liabilities | 12/31/09 (unaudited) ASSETS: Investment in securities (including securities loaned of $33,022,850) (cost $1,178,038,838) $1,189,645,742 Cash 5,690,393 Receivables -- Fund shares sold 5,528,532 Dividends and interest 11,460,492 Due from Pioneer Investment Management, Inc. 51,362 Other 100,594 - ----------------------------------------------------------------------------- Total assets $1,212,477,115 - ----------------------------------------------------------------------------- LIABILITIES: Payables -- Investment securities purchased $ 4,080,750 Fund shares repurchased 541,963 Dividends 2,473,374 Upon return of securities loaned 34,194,263 Due to affiliates 116,504 Accrued expenses 225,028 - ----------------------------------------------------------------------------- Total liabilities $ 41,631,882 - ----------------------------------------------------------------------------- NET ASSETS: Paid-in capital $1,196,355,920 Distributions in excess of net investment income (3,741,594) Accumulated net realized loss on investments (33,375,997) Net unrealized gain on investments 11,606,904 - ----------------------------------------------------------------------------- Total net assets $1,170,845,233 - ----------------------------------------------------------------------------- NET ASSET VALUE PER SHARE: (No par value, unlimited number of shares authorized) Class A (based on $348,145,325/38,152,912 shares) $ 9.12 Class B (based on $32,073,017/3,536,933 shares) $ 9.07 Class C (based on $70,630,641/7,822,970 shares) $ 9.03 Class R (based on $18,148,132/1,971,552 shares) $ 9.20 Class Y (based on $701,203,057/77,527,619 shares) $ 9.04 Class Z (based on $645,061/70,477 shares) $ 9.15 MAXIMUM OFFERING PRICE: Class A ($9.12 [divided by] 95.5% ) $ 9.55 ============================================================================= The accompanying notes are an integral part of these financial statements. 48 Pioneer Bond Fund | Semiannual Report | 12/31/09 Statement of Operations (unaudited) For the Six Months Ended 12/31/09 INVESTMENT INCOME: Dividends $ 318,704 Interest 32,983,540 Income from securities loaned, net 62,571 - ---------------------------------------------------------------------------------------- Total investment income $33,364,815 - ---------------------------------------------------------------------------------------- EXPENSES: Management fees $2,783,641 Transfer agent fees Class A 193,099 Class B 54,459 Class C 32,310 Class R 1,794 Class Y 71,561 Class Z 43 Distribution fees Class A 425,042 Class B 161,009 Class C 313,692 Class R 43,681 Shareholder communications expense 287,970 Administrative reimbursements 198,429 Custodian fees 21,673 Registration fees 39,370 Professional fees 62,081 Printing expense 58,227 Fees and expenses of nonaffiliated trustees 18,690 Miscellaneous 54,588 - ---------------------------------------------------------------------------------------- Total expenses $ 4,821,359 Less fees waived and expenses reimbursed by Pioneer Investment Management, Inc. (352,748) - ---------------------------------------------------------------------------------------- Net expenses $ 4,468,611 - ---------------------------------------------------------------------------------------- Net investment income $28,896,204 - ---------------------------------------------------------------------------------------- REALIZED AND UNREALIZED GAIN ON INVESTMENTS: Net realized gain on investments $ 2,949,238 - ---------------------------------------------------------------------------------------- Change in net unrealized gain on investments $58,249,364 - ---------------------------------------------------------------------------------------- Net gain on investments $61,198,602 - ---------------------------------------------------------------------------------------- Net increase in net assets resulting from operations $90,094,806 ========================================================================================= The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Semiannual Report | 12/31/09 49 Statements of Changes in Net Assets For the Six Months Ended 12/31/09 and the Year Ended 6/30/09, respectively - --------------------------------------------------------------------------------------------- Six Months Ended 12/31/09 Year Ended (unaudited) 6/30/09 - --------------------------------------------------------------------------------------------- FROM OPERATIONS: Net investment income $ 28,896,204 $ 53,558,886 Net realized gain (loss) on investments 2,949,238 (4,267,378) Change in net unrealized gain (loss) on investments 58,249,364 (23,773,754) - --------------------------------------------------------------------------------------------- Net increase in net assets resulting from operations $ 90,094,806 $ 25,517,754 - --------------------------------------------------------------------------------------------- DISTRIBUTIONS TO SHAREOWNERS: Net investment income: Class A ($0.24 and $0.55 per share, respectively) $ (8,955,232) $ (17,975,138) Class B ($0.19 and $0.47 per share, respectively) (685,604) (1,730,327) Class C ($0.19 and $0.48 per share, respectively) (1,343,157) (2,394,084) Class R ($0.22 and $0.53 per share, respectively) (426,475) (800,978) Class Y ($0.25 and $0.58 per share, respectively) (18,384,441) (36,661,955) Class Z ($0.25 and $0.58 per share, respectively) (13,107) (12,170) Net realized gain: Class A ($0.00 and $0.11 per share, respectively) -- (3,453,124) Class B ($0.00 and $0.11 per share, respectively) -- (396,155) Class C ($0.00 and $0.11 per share, respectively) -- (501,217) Class R ($0.00 and $0.11 per share, respectively) -- (153,607) Class Y ($0.00 and $0.11 per share, respectively) -- (6,405,050) Class Z ($0.00 and $0.11 per share, respectively) -- (1,237) - --------------------------------------------------------------------------------------------- Total distributions to shareowners $ (29,808,016) $ (70,485,042) - --------------------------------------------------------------------------------------------- FROM FUND SHARE TRANSACTIONS: Net proceeds from sale of shares $ 247,363,333 $ 384,747,141 Shares issued in reorganization -- 108,889,002 Reinvestment of distributions 12,615,320 34,561,507 Cost of shares repurchased (159,687,496) (530,397,256) - --------------------------------------------------------------------------------------------- Net increase (decrease) in net assets resulting from Fund share transactions $ 100,291,157 $ (2,199,606) - --------------------------------------------------------------------------------------------- Net increase (decrease) in net assets $ 160,577,947 $ (47,166,894) NET ASSETS: Beginning of period 1,010,267,286 1,057,434,180 - --------------------------------------------------------------------------------------------- End of period $1,170,845,233 $1,010,267,286 - --------------------------------------------------------------------------------------------- Distributions in excess of net investment income $ (3,741,594) $ (2,829,782) - --------------------------------------------------------------------------------------------- The accompanying notes are an integral part of these financial statements. 50 Pioneer Bond Fund | Semiannual Report | 12/31/09 12/09 Shares 12/09 Amount 6/09 Shares 6/09 Amount (unaudited) (unaudited) Class A Shares sold 7,175,930 $ 64,529,580 15,553,093 $132,784,018 Shares issued in reorganization -- -- 4,425,282 37,482,135 Reinvestment of distributions 676,887 6,126,309 1,731,953 14,470,158 Less shares repurchased (6,782,576) (60,892,754) (13,868,617) (117,130,438) - -------------------------------------------------------------------------------------------------------- Net increase 1,070,241 $ 9,763,135 7,841,711 $ 67,605,873 ======================================================================================================== Class B Shares sold 470,906 $ 4,228,734 1,505,037 $ 12,681,671 Reinvestment of distributions 56,324 506,226 194,697 1,616,128 Less shares repurchased (690,806) (6,178,257) (1,768,893) (14,896,110) - -------------------------------------------------------------------------------------------------------- Net decrease (163,576) $ (1,443,297) (69,159) $ (598,311) ======================================================================================================== Class C Shares sold 2,342,097 $ 20,882,935 4,636,458 $ 38,745,573 Reinvestment of distributions 93,275 835,468 201,354 1,663,357 Less shares repurchased (824,697) (7,344,634) (2,594,613) (21,719,772) - -------------------------------------------------------------------------------------------------------- Net increase 1,610,675 $ 14,373,769 2,243,199 $ 18,689,158 ======================================================================================================== Class R Shares sold 578,039 $ 5,187,561 1,668,291 $ 14,324,093 Reinvestment of distributions 31,764 289,936 94,300 794,045 Less shares repurchased (406,744) (3,668,805) (1,220,449) (10,440,197) - -------------------------------------------------------------------------------------------------------- Net increase 203,059 $ 1,808,692 542,142 $ 4,677,941 ======================================================================================================== Class Y Shares sold 17,251,892 $152,259,222 22,039,575 $185,940,489 Shares issued in reorganization -- -- 8,500,817 71,406,867 Reinvestment of distributions 540,687 4,854,990 1,925,529 16,016,659 Less shares repurchased (9,192,530) (81,565,867) (42,239,439) (366,207,372) - -------------------------------------------------------------------------------------------------------- Net increase (decrease) 8,600,049 $ 75,548,345 (9,773,518) $(92,843,357) ======================================================================================================== Class Z Shares sold 30,171 $ 275,301 33,110 $ 271,297 Reinvestment of distributions 263 2,391 136 1,160 Less shares repurchased (4,047) (37,179) (404) (3,367) - -------------------------------------------------------------------------------------------------------- Net increase 26,387 $ 240,513 32,842 $ 269,090 ======================================================================================================== The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Semiannual Report | 12/31/09 51 Financial Highlights - ------------------------------------------------------------------------------------------------------------------------------------ Six Months Ended Year Year Year Year Year 12/31/09 Ended Ended Ended Ended Ended (unaudited) 6/30/09 6/30/08 6/30/07 6/30/06 6/30/05 - ------------------------------------------------------------------------------------------------------------------------------------ Class A Net asset value, beginning of period $ 8.63 $ 9.10 $ 8.95 $ 8.89 $ 9.40 $ 9.18 - ------------------------------------------------------------------------------------------------------------------------------------ Increase (decrease) from investment operations: Net investment income $ 0.23 $ 0.50 $ 0.43 $ 0.40 $ 0.35 $ 0.40 Net realized and unrealized gain (loss) on investments 0.50 (0.31) 0.16 0.07 (0.47) 0.29 - ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) from investment operations $ 0.73 $ 0.19 $ 0.59 $ 0.47 $ (0.12) $ 0.69 Distributions to shareowners: Net investment income (0.24) (0.55) (0.44) (0.41) (0.39) (0.47) - ------------------------------------------------------------------------------------------------------------------------------------ Net realized gain -- (0.11) -- -- -- -- - ------------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $ 0.49 $ (0.47) $ 0.15 $ 0.06 $ (0.51) $ 0.22 - ------------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 9.12 $ 8.63 $ 9.10 $ 8.95 $ 8.89 $ 9.40 ==================================================================================================================================== Total return* 8.51% 2.65% 6.64% 5.31% (1.25)% 7.64% Ratio of net expenses to average net assets+ 0.85%** 0.89%(a) 1.00% 1.00% 1.00% 1.05% Ratio of net investment income to average net assets+ 5.08%** 5.88% 4.60% 4.48% 3.91% 4.27% Portfolio turnover rate 38%** 34% 73% 31% 60% 49% Net assets, end of period (in thousands) $348,145 $320,036 $265,959 $284,592 $208,454 $174,055 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Net expenses 1.05%** 1.09% 1.04% 1.00% 1.11% 1.18% Net investment income 4.88%** 5.68% 4.56% 4.48% 3.80% 4.14% Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 0.85%** 0.89%(a) 1.00% 1.00% 1.00% 1.05% Net investment income 5.08%** 5.88% 4.60% 4.48% 3.91% 4.27% ==================================================================================================================================== * 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. ** Annualized. + 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. 52 Pioneer Bond Fund | Semiannual Report | 12/31/09 - ---------------------------------------------------------------------------------------------------------------------------------- Six Months Ended Year Year Year Year Year 12/31/09 Ended Ended Ended Ended Ended (unaudited) 6/30/09 6/30/08 6/30/07 6/30/06 6/30/05 - ---------------------------------------------------------------------------------------------------------------------------------- Class B Net asset value, beginning of period $ 8.58 $ 9.05 $ 8.90 $ 8.85 $ 9.36 $ 9.14 - ---------------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income $ 0.18 $ 0.42 $ 0.34 $ 0.33 $ 0.27 $ 0.32 Net realized and unrealized gain (loss) on investments 0.50 (0.31) 0.16 0.05 (0.47) 0.28 - ---------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 0.68 $ 0.11 $ 0.50 $ 0.38 $ (0.20) $ 0.60 Distributions to shareowners: Net investment income (0.19) (0.47) (0.35) (0.33) (0.31) (0.38) Net realized gain -- (0.11) -- -- -- -- - ---------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 0.49 $ (0.47) $ 0.15 $ 0.05 $ (0.51) $ 0.22 - ---------------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.07 $ 8.58 $ 9.05 $ 8.90 $ 8.85 $ 9.36 ================================================================================================================================== Total return* 7.98% 1.62% 5.70% 4.26% (2.14)% 6.72% Ratio of net expenses to average net assets+ 1.90%** 1.90% 1.90% 1.92% 1.90% 1.95% Ratio of net investment income to average net assets+ 4.04%** 4.90% 3.72% 3.55% 3.06% 3.39% Portfolio turnover rate 38%** 34% 73% 31% 60% 49% Net assets, end of period (in thousands) $32,073 $31,738 $34,106 $36,366 $49,552 $56,828 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Net expenses 1.99%** 1.99% 1.90% 2.02% 1.99% 2.02% Net investment income 3.95%** 4.81% 3.72% 3.45% 2.97% 3.32% Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 1.90%** 1.90% 1.89% 1.90% 1.90% 1.95% Net investment income 4.04%** 4.90% 3.73% 3.57% 3.06% 3.39% ================================================================================================================================== * 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. ** Annualized. + Ratio with no reduction for fees paid indirectly. The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Semiannual Report | 12/31/09 53 Financial Highlights (continued) - --------------------------------------------------------------------------------------------------------------------------------- Six Months Ended Year Year Year Year Year 12/31/09 Ended Ended Ended Ended Ended (unaudited) 6/30/09 6/30/08 6/30/07 6/30/06 6/30/05 - --------------------------------------------------------------------------------------------------------------------------------- Class C Net asset value, beginning of period $ 8.54 $ 9.02 $ 8.87 $ 8.81 $ 9.32 $ 9.11 - --------------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income $ 0.19 $ 0.42 $ 0.35 $ 0.33 $ 0.28 $ 0.32 Net realized and unrealized gain (loss) on investments 0.49 (0.31) 0.16 0.06 (0.47) 0.28 - --------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 0.68 $ 0.11 $ 0.51 $ 0.39 $ (0.19) $ 0.60 Distributions to shareowners: Net investment income (0.19) (0.48) (0.36) (0.33) (0.32) (0.39) Net realized gain -- (0.11) -- -- -- -- - --------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 0.49 $ (0.48) $ 0.15 $ 0.06 $ (0.51) $ 0.21 - --------------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.03 $ 8.54 $ 9.02 $ 8.87 $ 8.81 $ 9.32 ================================================================================================================================= Total return* 8.05% 1.62% 5.80% 4.39% (2.08)% 6.68% Ratio of net expenses to average net assets+ 1.77%** 1.83% 1.82% 1.85% 1.89% 1.92% Ratio of net investment income to average net assets+ 4.13%** 4.93% 3.79% 3.62% 3.07% 3.24% Portfolio turnover rate 38%** 34% 73% 31% 60% 49% Net assets, end of period (in thousands) $70,631 $53,045 $35,784 $30,934 $35,942 $42,160 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Net expenses 1.77%** 1.83% 1.82% 1.85% 1.89% 1.92% Net investment income 4.13%** 4.93% 3.79% 3.62% 3.07% 3.24% Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 1.77%** 1.83% 1.82% 1.84% 1.89% 1.91% Net investment income 4.13%** 4.93% 3.79% 3.63% 3.07% 3.25% ================================================================================================================================= * 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. ** Annualized. + Ratio with no reduction for fees paid indirectly. The accompanying notes are an integral part of these financial statements. 54 Pioneer Bond Fund | Semiannual Report | 12/31/09 - ------------------------------------------------------------------------------------------------------------------------------ Six Months Ended Year Year Year Year Year 12/31/09 Ended Ended Ended Ended Ended (unaudited) 6/30/09 6/30/08 6/30/07 6/30/06 6/30/05 - ------------------------------------------------------------------------------------------------------------------------------ Class R Net asset value, beginning of period $ 8.71 $ 9.18 $ 9.05 $ 8.99 $ 9.50 $ 9.28 - ------------------------------------------------------------------------------------------------------------------------------ Increase (decrease) from investment operations: Net investment income $ 0.22 $ 0.48 $ 0.40 $ 0.39 $ 0.34 $ 0.36 Net realized and unrealized gain (loss) on investments 0.49 (0.31) 0.15 0.06 (0.47) 0.30 - ------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) from investment operations $ 0.71 $ 0.17 $ 0.55 $ 0.45 $(0.13) $ 0.66 Distributions to shareowners: Net investment income (0.22) (0.53) (0.42) (0.39) (0.38) (0.44) Net realized gain -- (0.11) -- -- -- -- - ------------------------------------------------------------------------------------------------------------------------------ Net increase (decrease) in net asset value $ 0.49 $ (0.47) $ 0.13 $ 0.06 $(0.51) $ 0.22 - ------------------------------------------------------------------------------------------------------------------------------ Net asset value, end of period $ 9.20 $ 8.71 $ 9.18 $ 9.05 $ 8.99 $ 9.50 ============================================================================================================================== Total return* 8.24% 2.35% 6.15% 5.04% (1.43)% 7.27% Ratio of net expenses to average net assets+ 1.25%** 1.25% 1.25% 1.25% 1.25% 1.31% Ratio of net investment income to average net assets+ 4.69%** 5.53% 4.35% 4.24% 3.50% 3.77% Portfolio turnover rate 38%** 34% 73% 31% 60% 49% Net assets, end of period (in thousands) $18,148 $15,404 $11,263 $6,511 $3,042 $1,259 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Net expenses 1.28%** 1.30% 1.31% 1.44% 1.46% 1.43% Net investment income 4.66%** 5.48% 4.30% 4.05% 3.29% 3.65% Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 1.25%** 1.25% 1.25% 1.25% 1.25% 1.31% Net investment income 4.69%** 5.53% 4.35% 4.24% 3.50% 3.77% ============================================================================================================================== * 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 each end of each period. ** Annualized. + Ratio with no reduction for fees paid indirectly. The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Semiannual Report | 12/31/09 55 Financial Highlights (continued) - ---------------------------------------------------------------------------------------------------------------------------------- Six Months Ended Year Year Year Year Year 12/31/09 Ended Ended Ended Ended Ended (unaudited) 6/30/09 6/30/08 6/30/07 6/30/06 6/30/05 - ---------------------------------------------------------------------------------------------------------------------------------- Class Y Net asset value, beginning of period $ 8.55 $ 9.02 $ 8.88 $ 8.83 $ 9.33 $ 9.12 - ---------------------------------------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income $ 0.24 $ 0.53 $ 0.45 $ 0.44 $ 0.39 $ 0.44 Net realized and unrealized gain (loss) on investments 0.50 (0.31) 0.16 0.06 (0.46) 0.28 - ---------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) from investment operations $ 0.74 $ 0.22 $ 0.61 $ 0.50 $ (0.07) $ 0.72 Distributions to shareowners: Net investment income (0.25) (0.58) (0.47) (0.45) (0.43) (0.51) Net realized gain -- (0.11) -- -- -- -- - ---------------------------------------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 0.49 $ (0.47) $ 0.14 $ 0.05 $ (0.50) $ 0.21 - ---------------------------------------------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.04 $ 8.55 $ 9.02 $ 8.88 $ 8.83 $ 9.33 ================================================================================================================================== Total return* 8.67% 2.95% 6.91% 5.65% (0.77)% 8.07% Ratio of net expenses to average net assets+ 0.61%** 0.63% 0.59% 0.57% 0.58% 0.61% Ratio of net investment income to average net assets+ 5.32%** 6.10% 5.02% 4.89% 4.20% 4.43% Portfolio turnover rate 38%** 34% 73% 31% 60% 49% Net assets, end of period (in thousands) $701,203 $589,661 $710,219 $613,523 $521,480 $21,027 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Net expenses 0.61%** 0.64% 0.61% 0.57% 0.58% 0.61% Net investment income 5.32%** 6.09% 5.00% 4.89% 4.20% 4.43% Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 0.61%** 0.63% 0.59% 0.57% 0.58% 0.61% Net investment income 5.32%** 6.10% 5.02% 4.89% 4.20% 4.43% ================================================================================================================================== * 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 each end of each period. ** Annualized. + Ratio with no reduction for fees paid indirectly. The accompanying notes are an integral part of these financial statements. 56 Pioneer Bond Fund | Semiannual Report | 12/31/09 - -------------------------------------------------------------------------------------------------- Six Months Ended Year 12/31/08 Ended 7/6/07 (a) (unaudited) 6/30/09 to 6/30/08 - -------------------------------------------------------------------------------------------------- Class Z Net asset value, beginning of period $ 8.67 $ 9.10 $ 8.89 - -------------------------------------------------------------------------------------------------- Increase (decrease) from investment operations: Net investment income $ 0.25 $ 0.54 $ 0.45 Net realized and unrealized gain (loss) on investments 0.48 (0.28) 0.22 - -------------------------------------------------------------------------------------------------- Net increase from investment operations $ 0.73 $ 0.26 $ 0.67 Distributions to shareowners: Net investment income (0.25) (0.58) (0.46) Net realized gain -- (0.11) -- - -------------------------------------------------------------------------------------------------- Net increase (decrease) in net asset value $ 0.48 $ (0.43) $ 0.21 - -------------------------------------------------------------------------------------------------- Net asset value, end of period $ 9.15 $ 8.67 $ 9.10 ================================================================================================== Total return* 8.47% 3.42% 7.63%(b) Ratio of net expenses to average net assets+ 0.62%** 0.65% 0.58%** Ratio of net investment income to average net assets+ 5.22%** 5.91% 5.00%** Portfolio turnover rate 38%** 34% 73%** Net assets, end of period (in thousands) $ 645 $ 382 $ 102 Ratios with no waiver of fees and assumption of expenses by the Adviser and no reduction for fees paid indirectly: Net expenses 0.62%** 0.67% 0.58%** Net investment income 5.22%** 5.89% 5.00%** Ratios with waiver of fees and assumption of expenses by the Adviser and reduction for fees paid indirectly: Net expenses 0.62%** 0.65% 0.58%** Net investment income 5.22%** 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 each end of each period. ** Annualized. + Ratios with no fees paid indirectly. The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund | Semiannual Report | 12/31/09 57 Notes to Financial Statements | 12/31/09 (unaudited) 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 objectives of the Fund are 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 it more susceptible to any economic, political, or regulatory developments or other risks affecting those industries and sectors. The Fund's prospectuses contain unaudited information regarding the Fund's principal risks. Please refer to those documents 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 58 Pioneer Bond Fund | Semiannual Report | 12/31/09 reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of income, expenses and gains and losses on investments during the reporting period. Actual results could differ from those estimates. 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 Portfolio 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. For the limited number of senior loans for which no reliable price quotes are available, such senior loans 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 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 and may include yield equivalents or a pricing matrix. 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 December 31, 2009, there were no securities that were valued using fair value methods (other than securities that were valued using prices supplied by independent pricing services). 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. Principal amounts of mortgage-backed securities are adjusted for monthly paydowns. Premiums and discounts related to certain mortgage-backed Pioneer Bond Fund | Semiannual Report | 12/31/09 59 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, 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. The tax character of current year distributions paid will be determined at the end of the current taxable year. The tax character of distributions paid during the year ended June 30, 2009 was as follows: - -------------------------------------------------------------------------------- 2009 - -------------------------------------------------------------------------------- Distributions paid from: Ordinary income $59,574,652 Long-term capital gain 10,910,390 - -------------------------------------------------------------------------------- Total $70,485,042 ================================================================================ 60 Pioneer Bond Fund | Semiannual Report | 12/31/09 The following shows the components of distributable earnings on a federal income tax basis at June 30, 2009. - -------------------------------------------------------------------------------- 2009 - -------------------------------------------------------------------------------- Distributable earnings: Undistributed ordinary income $ 734,831 Capital loss carryforward (34,915,354) Dividends payable (3,337,781) Post October loss deferred (3,538,318) Unrealized depreciation (44,740,855) - -------------------------------------------------------------------------------- Total $ (85,797,477) ================================================================================ The difference between book-basis and tax-basis unrealized appreciation is attributable to the tax deferral of losses on wash sales, the tax treatment of premium and amortization and the tax basis adjustments on interest or defaulted bonds. 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 approximately $90,072 in underwriting commissions on the sale of Class A shares during the six months ended December 31, 2009. D. Class Allocations Income, common expenses, and realized and unrealized gains and losses are calculated at the Fund level and allocated daily to each class of shares based on its respective percentage of adjusted net assets at the beginning of the day. 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. Class Y and Class Z shares do not pay distribution fees. Shareowners of each class participate in all expenses and fees paid to the transfer agent, Pioneer Investment Management Shareholder Services, Inc. (PIMSS), for its services, which 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 Pioneer Bond Fund | Semiannual Report | 12/31/09 61 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. 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. F. 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 fair 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 fair 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 fair value of the loaned securities. If the required market value of the collateral is less than the fair value of the loaned securities, the borrower is required to deliver additional collateral for the account of the Fund prior to the close of the next business 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. 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 six months ended December 31, 2009, the effective management fee (excluding waivers and/or assumption of expenses) was equal to 0.50% of the Fund's average daily net assets. 62 Pioneer Bond Fund | Semiannual Report | 12/31/09 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. These expense limitations are in effect through November 1, 2013 for Class A and Class Z shares, through November 1, 2011 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 date 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 $26,272 in management fees, administrative costs and certain other reimbursements payable to PIM at December 31, 2009. 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 six months ended December 31, 2009, such out of pocket expenses by class of shares were as follows: - -------------------------------------------------------------------------------- Shareholder Communications: - -------------------------------------------------------------------------------- Class A $184,163 Class B 12,275 Class C 29,644 Class R 16,037 Class Y 45,783 Class Z 68 - -------------------------------------------------------------------------------- Total: $287,970 ================================================================================ Included in "Due to affiliates" reflected on the Statement of Assets and Liabilities is $84,791 in transfer agent fees and out-of-pocket reimbursements payable to PIMSS at December 31, 2009. 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 Pioneer Bond Fund | Semiannual Report | 12/31/09 63 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 $5,441 in distribution fees payable to PFD at December 31, 2009. 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 December 31, 2009, CDSCs in the amount of $41,285 were paid to PFD. 5. Expense Offset Arrangements The Fund has entered into certain expense offset arrangements with PIMSS resulting in a reduction in the Fund's total expenses due to interest earned on cash held by PIMSS. For the six months ended December 31, 2009, the Fund's expenses not reduced under such arrangements. 6. Reorganization Information On May 8, 2009, beneficial owners of Regions Morgan Keegan Select Fixed Income Fund approved a proposed Agreement and Plan of Reorganization that provided for the reorganization listed below. The purpose of this transaction was to combine two funds with similar investment objectives and strategies. This tax-free reorganization was accomplished on May 15, 2009 ("Closing Date"), by exchanging the assets and stated liabilities of Regions Morgan 64 Pioneer Bond Fund | Semiannual Report | 12/31/09 Keegan Select Fixed Income Fund for shares of Pioneer Bond Fund. Shareowners holding Class A, Class C and Class I shares of Regions Morgan Keegan Select Fixed Income Fund received Class A, Class C and Class Y shares, respectively, of Pioneer Bond Fund in the reorganization. The investment portfolio of Regions Morgan Keegan Select Fixed Income Fund, with a fair value of $103,155,802 and an identified cost of $104,563,375 at May 15, 2009, was the principal asset acquired by Pioneer Bond Fund. For financial reporting purposes, assets received and shares issued by Pioneer Bond Fund were recorded at fair value; however, the cost basis of the investments received from Regions Morgan Keegan Select Fixed Income Fund was carried forward to align ongoing reporting of Pioneer Bond Fund's realized and unrealized gains and losses with amounts distributable to shareowners for tax purposes. The following charts show the details of the reorganization as of that Closing Date: - -------------------------------------------------------------------------------------------- Regions Morgan Pioneer Keegan Select Pioneer Bond Fund Fixed Income Fund Bond Fund (Pre-Reorganization) (Pre-Reorganization) (Post-Reorganization) - -------------------------------------------------------------------------------------------- Net Assets Class A $276,477,901 $ 36,518,366 $313,960,037 Class B $ 31,100,916 $ -- $ 31,100,916 Class C $ 48,515,093 $ 963,769 $ 48,515,093 Class R $ 15,664,037 $ -- $ 15,664,037 Class Y/I $518,695,851 $ 71,406,867 $590,102,718 Class Z $ 373,324 $ -- $ 373,324 - -------------------------------------------------------------------------------------------- Total Net Assets $890,827,123 $108,889,002 $999,716,125 - -------------------------------------------------------------------------------------------- Shares Outstanding Class A 32,629,637 4,117,511 37,054,919 Class B 3,692,276 -- 3,692,276 Class C 5,783,455 108,700 5,783,455 Class R 1,830,795 -- 1,830,795 Class Y/I 61,769,449 8,054,285 70,270,266 Class Z 43,870 -- 43,870 Shares Issued in Reorganization Class A 4,425,282 Class Y 8,500,817 - -------------------------------------------------------------------------------- Unrealized Accumulated Depreciation On Loss On Closing Date Closing Date - -------------------------------------------------------------------------------- Regions Morgan Keegan Select Fixed Income Fund $(1,407,573) $(7,590,952) Since the combined investment portfolios have been managed as a single integrated portfolio since the reorganization was completed, it is not practical to separate the amounts of revenue and earnings of Regions Morgan Keegan Select Fixed Income Fund that have been included in Pioneer Bond Fund's statement of operations since May 15, 2009. Pioneer Bond Fund | Semiannual Report | 12/31/09 65 7. Subsequent Event In preparing these financial statements, PIM has evaluated the impact of all events and transactions for potential recognition or disclosure through February 22, 2010 and has determined that there were no subsequent events requiring recognition or disclosure in the financial statements. 66 Pioneer Bond Fund | Semiannual Report | 12/31/09 Approval of Investment Advisory Agreement (unaudited) Pioneer Investment Management, Inc. (PIM) serves as the investment adviser to Pioneer Bond Fund (the Fund) pursuant to an investment advisory agreement between PIM and the Fund. In order for PIM to remain the investment adviser of the Fund, the Trustees of the Fund must determine annually whether to renew the investment advisory agreement for the Fund. The contract review process began in March 2009 as the Trustees of the Fund agreed on, among other things, an overall approach and timeline for the process. In July 2009, the Trustees approved the format of the contract review materials and submitted their formal request to PIM to furnish information necessary to evaluate the terms of the investment advisory agreement. The contract review materials were provided to the Trustees in August 2009. After reviewing and discussing the materials, the Trustees submitted a request for additional information to PIM in September 2009, and materials were provided in response to this request. Meetings of the independent Trustees of the Fund were held in July, September, October, and November, 2009 to review and discuss the contract review materials. In addition, the Trustees took into account the information related to the Fund provided to the Trustees at each regularly scheduled meeting. At a meeting held on November 10, 2009, based on their evaluation of the information provided by PIM and third parties, the Trustees of the Fund, including the independent Trustees voting separately, unanimously approved the renewal of the investment advisory agreement for another year. In considering the renewal of the investment advisory agreement, the Trustees considered various factors that they determined were relevant, including the factors described below. The Trustees did not identify any single factor as the controlling factor in determining to approve the renewal of the agreement. Nature, Extent and Quality of Services The Trustees considered the nature, extent and quality of the services that had been provided by PIM to the Fund, taking into account the investment objective and strategy of the Fund. The Trustees reviewed the terms of the investment advisory agreement. The Trustees also reviewed PIM's investment approach for the Fund, its research process and its process for trade execution. The Trustees considered the resources of PIM and the personnel of PIM who provide investment management services to the Fund. The Trustees considered the non-investment resources and personnel of PIM involved in PIM's services to the Fund, including PIM's compliance and legal resources and personnel. The Trustees also considered the substantial attention and high priority given by PIM's senior management to the Pioneer fund complex. Pioneer Bond Fund | Semiannual Report | 12/31/09 67 The Trustees considered that PIM supervises and monitors the performance of the Fund's service providers and provides the Fund with personnel (including Fund officers) and other resources that are necessary for the Fund's business management and operations. The Trustees also considered that, as administrator, PIM is responsible for the administration of the Fund's business and other affairs. The Trustees considered the fees paid to PIM for the provision of administration services. Based on these considerations, the Trustees concluded that the nature, extent and quality of services that had been provided by PIM to the Fund were satisfactory and consistent with the terms of the investment advisory agreement. Performance of the Fund The Trustees considered the performance results of the Fund over various time periods. They reviewed information comparing the Fund's performance with the performance of its peer group of funds as classified by Morningstar, Inc. (Morningstar), an independent provider of investment company data, and with the performance of the Fund's benchmark index. The Trustees considered that the Fund's annualized total return was in the third quintile of its Morningstar category for the one year period ended June 30, 2009 and in the second quintile of its Morningstar category for the three, five and ten year periods ended June 30, 2009. (In all quintile rankings referred to throughout this disclosure, first quintile is most favorable to the Fund's shareowners. Thus, highest relative performance would be first quintile and lowest relative expenses would also be first quintile.) The Trustees concluded that the investment performance of the Fund was satisfactory. Management Fee and Expenses The Trustees considered information showing the fees and expenses of the Fund in comparison to the management fees of its peer group of funds as classified by Morningstar and the expense ratios of a peer group of funds selected on the basis of criteria determined by the independent Trustees for this purpose using data provided by Strategic Insight Mutual Trust Research and Consulting, LLC (Strategic Insight), an independent third party. The Trustees considered that the Fund's management fee for the twelve months ended June 30, 2009 was in the third quintile relative to the management fees paid by other funds in its Morningstar peer group for the comparable period. The Trustees also considered that the Fund's expense ratio for the twelve months ended June 30, 2009 was in the second quintile relative to its Strategic Insight peer group for the comparable period. The Trustees considered the breakpoints in the management fee schedule and the reduced fee rates above certain asset levels. The Trustees also reviewed management fees charged by PIM to its institutional and other clients. In evaluating the fees associated with PIM's client accounts, the Trustees took into account the respective demands, resources and 68 Pioneer Bond Fund | Semiannual Report | 12/31/09 complexity associated with the Fund and client accounts. The Trustees noted that in some instances the fee rates for those clients were lower than the management fee for the Fund and considered that, under the investment advisory agreement with the Fund, PIM performs additional services for the Fund that it does not provide to those other clients or services that are broader in scope, including oversight of the Fund's other service providers and activities related to compliance and the extensive regulatory and tax regimes to which the Fund is subject. The Trustees concluded that the management fee payable by the Fund to PIM was reasonable in relation to the nature and quality of the services provided by PIM. The Trustees also concluded that the Fund's expense ratio was reasonable taking into account the nature and quality of services provided by PIM and the contractual expense limitation agreed to by PIM with respect to the Fund. Profitability The Trustees considered information provided by PIM regarding the profitability of PIM with respect to the advisory services provided by PIM to the Fund, including the methodology used by PIM in allocating certain of its costs to the management of the Fund. The Trustees also considered PIM's profit margin in connection with the overall operation of the Fund. They further reviewed the financial results realized by PIM and its affiliates from non-fund businesses. The Trustees considered PIM's profit margins with respect to the Fund in comparison to the limited industry data available and noted that the profitability of any adviser was affected by numerous factors, including its organizational structure and method for allocating expenses. The Trustees concluded that PIM's profitability with respect to the management of the Fund was not unreasonable. Economies of Scale The Trustees considered PIM's views relating to economies of scale in connection with the Pioneer Funds as fund assets grow and the extent to which any such economies of scale are shared with funds and fund shareholders. The Trustees recognize that economies of scale are difficult to identify and quantify and that, among other factors that may be relevant, are the following: fee levels, expense subsidization, investment by PIM in research and analytical capabilities and PIM's commitment and resource allocation to the Funds. The Trustees noted that profitability also may be an indicator of the availability of any economies of scale, although profitability may vary for other reasons particularly, for example during the difficult year in 2008 for financial markets, as the level of services was maintained notwithstanding a significant decline in PIM's fee revenues from the Funds. Accordingly, the Trustees concluded that economies of scale, if any, were being appropriately shared with the Fund. Pioneer Bond Fund | Semiannual Report | 12/31/09 69 Other Benefits The Trustees considered the other benefits to PIM from its relationship with the Fund. The Trustees considered the character and amount of fees paid by the Fund, other than under the investment advisory agreement, for services provided by PIM and its affiliates. The Trustees further considered the revenues and profitability of PIM's businesses other than the fund business. The Trustees considered the intangible benefits to PIM by virtue of its relationship with the Fund and the other Pioneer funds. The Trustees concluded that the receipt of these benefits was reasonable in the context of the overall relationship between PIM and the Fund. Conclusion After consideration of the factors described above as well as other factors, the Trustees, including all of the independent Trustees, concluded that the investment advisory agreement between PIM and the Fund, including the fees payable thereunder, was fair and reasonable and voted to approve the proposed renewal of the investment advisory agreement for the Fund. 70 Pioneer Bond Fund | Semiannual Report | 12/31/09 Trustees, Officers and Service Providers Trustees Officers John F. Cogan, Jr., Chairman John F. Cogan, Jr., President David R. Bock Daniel K. Kingsbury, Executive Vice President Mary K. Bush Mark E. Bradley, Treasurer Benjamin M. Friedman Dorothy E. Bourassa, Secretary Margaret B.W. Graham Daniel K. Kingsbury Thomas J. Perna Marguerite A. Piret Investment Adviser and Administrator Pioneer Investment Management, Inc. Custodian Brown Brothers Harriman & Co. 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 pioneerinvestments.com. This information is also available on the Securities and Exchange Commission's web site at http://www.sec.gov. Pioneer Bond Fund | Semiannual Report | 12/31/09 71 This page for your notes. 72 Pioneer Bond Fund | Semiannual Report | 12/31/09 This page for your notes. Pioneer Bond Fund | Semiannual Report | 12/31/09 73 This page for your notes. 74 Pioneer Bond Fund | Semiannual Report | 12/31/09 This page for your notes. Pioneer Bond Fund | Semiannual Report | 12/31/09 75 This page for your notes. 76 Pioneer Bond Fund | Semiannual Report | 12/31/09 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: pioneerinvestments.com This report must be preceded or accompanied by a prospectus. The Fund files a complete schedule of investments with the Securities and Exchange Commission for the first and third quarters for each fiscal year on Form N-Q. Shareholders may view the filed Form N-Q by visiting the Commission's web site at http://www.sec.gov. The filed form may also be viewed and copied at the Commission's Public Reference Room in Washington, DC. Information regarding the operations of the Public Reference Room may be obtained by calling 1-800-SEC-0330. 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. N/A (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. N/A (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. N/A (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. N/A (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. N/A (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. N/A (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 March 1, 2010 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 March 1, 2010 By (Signature and Title)* /s/ Mark Bradley Mark Bradley, Treasurer Date March 1, 2010 * Print the name and title of each signing officer under his or her signature.