OMB APPROVAL OMB Number: 3235-0570 Expires: September 30, 2007 Estimated average burden hours per response.....19.4 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: January 1, 2006 through June 30, 2006 Form N-CSR is to be used by management investment companies to file reports with the Commission not later than 10 days after the transmission to stockholders of any report that is required to be transmitted to stockholders under Rule 30e-1 under the Investment Company Act of 1940 (17 CFR 270.30e-1). The Commission may use the information provided on Form N-CSR in its regulatory, disclosure review, inspection, and policymaking roles. A registrant is required to disclose the information specified by Form N-CSR, and the Commission will make this information public. A registrant is not required to respond to the collection of information contained in Form N-CSR unless the Form displays a currently valid Office of Management and Budget ("OMB") control number. Please direct comments concerning the accuracy of the information collection burden estimate and any suggestions for reducing the burden to Secretary, Securities and Exchange Commission, 450 Fifth Street, NW, Washington, DC 20549-0609. The OMB has reviewed this collection of information under the clearance requirements of 44 U.S.C. ss. 3507. ITEM 1. REPORTS TO SHAREOWNERS. PIONEER ----------------------- BOND FUND Annual Report 6/30/06 [LOGO] PIONEER Investments(R) Table of Contents - -------------------------------------------------------------------------------- Letter to Shareowners 2 Portfolio Summary 4 Prices and Distributions 5 Performance Update 6 Comparing Ongoing Fund Expenses 12 Portfolio Management Discussion 14 Schedule of Investments 18 Financial Statements 41 Notes to Financial Statements 51 Report of Independent Registered Public Accounting Firm 60 Trustees, Officers and Service Providers 61 President's Dear Shareowner, - -------------------------------------------------------------------------------- We know from the history of the capital markets that sudden shifts in investor sentiment can occur with little warning, based on an assortment of events. We believe such a shift in sentiment is occurring in reaction to the possibility that U.S. economic growth may slow in the second half of 2006. While U.S. markets fell in late May and early June, the economic events of the six- and 12-month periods ending June 30, 2006, have actually been characterized by continued low inflation at home and strong growth prospects abroad with rising commodity and stock prices. According to the International Monetary Fund, international economic growth in 2004-5 was the fastest of any two-year period in more than 30 years, and 2006 growth is projected to match the healthy growth of 2005. The growth has been broad-based, with Europe, Japan, and emerging market economies all showing strength. The result has been rising prices across a broad range of commodities, increasing corporate profits, and higher interest rates. The U.S. bond markets' concern has been that strong economic growth would spark inflation - we have already seen commodity prices rise, and U.S. labor costs are threatening to increase, since we are close to full employment. That may also be a reason why public sentiment is becoming uneasy. Despite strong first quarter economic growth, the U.S. economy for the second half of the year may slow in reaction to past increases in interest rates and energy costs. Thus far the only sign of such a slowdown has been a cooling housing market. Yet many observers believe a slower growing economy could be welcomed by the markets. The U.S. Federal Reserve has continued its program of measured short-term interest rate increases. However, the Fed Chairman, Ben Bernanke, indicated that inflation may moderate, which would permit the Fed to stop raising interest rates. Such action could have positive effects for both consumers and investors over the intermediate-to-longer term. By restraining inflation, the Fed may also limit upward 2 Letter pressure on longer-maturity bond yields and downward pressure on stocks' price/earnings ratios. In summary, we think security market valuations remain reasonable, and yet there are no guarantees in investing. The unpredictability reinforces the importance of Pioneer's message that investors should remain diversified, take a long-term view, and base investment decisions on economic and market fundamentals, rather than on emotion. Our investment philosophy and approach continue to be based on the use of fundamental research to identify a range of opportunities that offer an attractive balance of risk and reward to help shareowners work toward their long-term goals. Respectfully, /s/ Osbert M. Hood Osbert M. Hood, President Pioneer Investment Management, 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 the 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. 3 Pioneer Bond Fund - -------------------------------------------------------------------------------- PORTFOLIO SUMMARY 6/30/06 - -------------------------------------------------------------------------------- Portfolio Diversification - -------------------------------------------------------------------------------- (As a percentage of total investment portfolio) [THE FOLLOWING TABLE WAS DEPICTED AS A PIE CHART IN THE PRINTED MATERIAL.] U.S. Government Securities 71.4% U.S. Corporate Bonds 25.7 Asset Backed Securities 1.5 Collateralized Mortgage Obligations 1.3 Municipal Bonds 0.1 Portfolio Quality - -------------------------------------------------------------------------------- (As a percentage of holdings) [THE FOLLOWING TABLE WAS DEPICTED AS A PIE CHART IN THE PRINTED MATERIAL.] AAA 74.3% AA 4.8 A 9.5 BBB 6.2 BB 3.9 B 1.2 Commercial Paper 0.1 10 Largest Holdings - -------------------------------------------------------------------------------- (As a percentage of long-term holdings) 1. U.S. Treasury Bonds, 6.25%, 8/15/23 5.93% 2. U.S. Treasury Bonds, 4.25%, 11/15/13 5.01 3. U.S. Treasury Inflation Notes, 1.875%, 7/15/15 3.20 4. U.S. Treasury Notes, 3.625%, 6/15/10 3.02 5. Government National Mortgage Association, 5.5%, 1/15/36 1.95 6. U.S. Treasury Notes, 7.5%, 11/15/16 1.86 7. Federal Home Loan Mortgage Corp., 4.5%, 10/1/20 1.63 8. GE Electric Co., 5.0%, 2/1/13 1.41 9. Federal National Mortgage Association, 5.5%, 4/1/36 1.39 10. Federal Home Loan Mortgage Corp., 4.5%, 10/1/35 1.20 This list excludes temporary cash investments and derivative instruments. Portfolio holdings will vary for other periods. 4 Pioneer Bond Fund - ----------------------------------------------------------------------------- PRICES AND DISTRIBUTIONS - ----------------------------------------------------------------------------- Net Asset Value Per Share - ----------------------------------------------------------------------------- Class 6/30/06 6/30/05 ----- ------- ------- A $8.89 $9.40 B $8.85 $9.36 C $8.81 $9.32 Investor $8.89 $9.40 R $8.99 $9.50 Y $8.83 $9.33 Distributions Per Share - ----------------------------------------------------------------------------- 7/1/05 - 6/30/06 ----------------------------------------------- Net Investment Short-Term Long-Term Class Income Capital Gains Capital Gains ----- ------ ------------- ------------- A $0.3948 $ - $ - B $0.3123 $ - $ - C $0.3191 $ - $ - Investor $0.4194 $ - $ - R $0.3764 $ - $ - Y $0.4289 $ - $ - 5 Pioneer Bond Fund - -------------------------------------------------------------------------------- PERFORMANCE UPDATE 6/30/06 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 Lehman Brothers Aggregate Bond Index. - ---------------------------------------- Average Annual Total Returns (As of June 30, 2006) Public Net Asset Offering Period Value (NAV) Price (POP) 10 Years 5.79% 5.31% 5 Years 5.57 4.61 1 Year -1.25 -5.66 - ---------------------------------------- [THE FOLLOWING TABLE WAS DEPICTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL.] Pioneer Lehman Brothers Bond Fund Aggregate Bond Index 6/96 $ 9,550 $10,000 10,225 10,815 6/98 11,251 11,955 11,403 12,331 6/00 11,551 12,894 12,787 14,342 6/02 13,752 15,579 15,317 17,200 6/04 15,774 17,255 16,981 18,428 6/06 16,769 18,280 Call 1-800-225-6292 or visit 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 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 Lehman Brothers 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. 6 Pioneer Bond Fund - -------------------------------------------------------------------------------- PERFORMANCE UPDATE 6/30/06 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 Lehman Brothers Aggregate Bond Index. - ---------------------------------------- Average Annual Total Returns (As of June 30, 2006) If If Period Held Redeemed 10 Years 4.92% 4.92% 5 Years 4.68 4.68 1 Year -2.14 -5.92 - ---------------------------------------- [THE FOLLOWING TABLE WAS DEPICTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL.] Pioneer Lehman Brothers Bond Fund Aggregate Bond Index 6/96 $10,000 $10,000 10,624 10,815 6/98 11,603 11,955 11,670 12,331 6/00 11,726 12,894 12,865 14,342 6/02 13,736 15,579 15,171 17,200 6/04 15,480 17,255 16,520 18,428 6/06 16,166 18,280 Call 1-800-225-6292 or visit 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/bshares. 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 Lehman Brothers 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. 7 Pioneer Bond Fund - -------------------------------------------------------------------------------- PERFORMANCE UPDATE 6/30/06 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 Lehman Brothers Aggregate Bond Index. - ---------------------------------------- Average Annual Total Returns (As of June 30, 2006) If If Period Held Redeemed 10 Years 4.84% 4.84% 5 Years 4.62 4.62 1 Year -2.08 -2.08 - ---------------------------------------- [THE FOLLOWING TABLE WAS DEPICTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL.] Pioneer Lehman Brothers Bond Fund Aggregate Bond Index 6/96 $10,000 $10,000 10,613 10,815 6/98 11,581 11,955 11,650 12,331 6/00 11,692 12,894 12,798 14,342 6/02 13,635 15,579 15,037 17,200 6/04 15,355 17,255 16,380 18,428 6/06 16,039 18,280 Call 1-800-225-6292 or visit 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 Lehman Brothers 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. 8 Pioneer Bond Fund - -------------------------------------------------------------------------------- PERFORMANCE UPDATE 6/30/06 INVESTOR CLASS 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 Lehman Brothers Aggregate Bond Index. - ---------------------------------------------------- Average Annual Total Returns (As of June 30, 2006) Public Net Asset Offering Period Value (NAV) Price (POP) Life-of-Class 12/10/04 1.17% 1.17% 1 Year -0.98 -0.98 - ---------------------------------------------------- [THE FOLLOWING TABLE WAS DEPICTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL.] Pioneer Lehman Brothers Bond Fund Aggregate Bond Index 12/94 $10,000 $ 10,000 10,264 10,251 6/06 10,163 10,169 Call 1-800-225-6292 or visit 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. Certain Pioneer funds (the "Funds") issued Investor Class shares in connection with the reorganization of Safeco mutual funds. The Funds are not offering additional Investor Class shares except in connection with the reinvestment of dividends on the Funds' outstanding Investor Class shares. All Investor Class shares of the Funds, whenever issued, convert to Class A shares of their respective Funds on December 10, 2006. Investor Class shares are not subject to sales charges. 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 does not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. The Lehman Brothers 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. 9 Pioneer Bond Fund - -------------------------------------------------------------------------------- PERFORMANCE UPDATE 6/30/06 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 Lehman Brothers Aggregate Bond Index. - ----------------------------------------- Average Annual Total Returns (As of June 30, 2006) If If Period Held Redeemed 10 Years 5.41% 5.41% 5 Years 5.32 5.32 1 Year -1.43 -1.43 - ----------------------------------------- [THE FOLLOWING TABLE WAS DEPICTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL.] Pioneer Lehman Brothers Bond Fund Aggregate Bond Index 6/96 $10,000 $10,000 10,656 10,815 6/98 11,668 11,955 11,766 12,331 6/00 11,860 12,894 13,063 14,342 6/02 13,980 15,579 15,517 17,200 6/04 16,013 17,255 17,177 18,428 6/06 16,931 18,280 Call 1-800-225-6292 or visit 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 of 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, which performance may be influenced by the smaller asset size of Class R shares compared to Class A shares. Class R shares are not subject to sales charges and are available for limited groups of eligible investors, including institutional investors. All results are historical and assume the reinvestment of dividends and capital gains. Other share classes are available for which performance and expenses will differ. Performance results reflect any applicable expense waivers in effect during the periods shown. Without such waivers Fund performance would be lower. Waivers may not be in effect for all funds. Certain fee waivers are contractual through a specified period. Otherwise, fee waivers can be rescinded at any time. See the prospectus and financial statements for more information. The performance table and graph do not reflect the deduction of fees and taxes that a shareowner would pay on Fund distributions or the redemption of Fund shares. The Lehman Brothers 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 - -------------------------------------------------------------------------------- PERFORMANCE UPDATE 6/30/06 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 Lehman Brothers Aggregate Bond Index. - ----------------------------------------- Average Annual Total Returns (As of June 30, 2006) If If Period Held Redeemed 10 Years 6.02% 6.02% 5 Years 6.02 6.02 1 Year -0.77 -0.77 - ----------------------------------------- [THE FOLLOWING TABLE WAS DEPICTED AS A MOUNTAIN CHART IN THE PRINTED MATERIAL.] Pioneer Lehman Brothers Bond Fund Aggregate Bond Index 6/96 $10,000 $10,000 10,709 10,815 6/98 11,784 11,955 11,943 12,331 6/00 12,098 12,894 13,392 14,342 6/02 14,452 15,579 16,166 17,200 6/04 16,728 17,255 18,078 18,428 6/06 17,938 18,280 Call 1-800-225-6292 or visit 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 for periods prior to the inception of Y shares reflects the NAV performance of the Fund's A shares. The performance does not reflect differences in expenses, including the Rule 12b-1 fees applicable to A shares. Since fees for A shares are generally higher than those of Y shares, the performance shown for Y shares prior to their inception would have been higher. Class A shares are used as a proxy through 9/20/01. 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 Lehman Brothers 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. 11 Pioneer Bond Fund - -------------------------------------------------------------------------------- COMPARING ONGOING FUND EXPENSES - -------------------------------------------------------------------------------- As a shareowner in the Fund, you incur two types of costs: (1) ongoing costs, including management fees, distribution and/or service (12b-1) fees, and other Fund expenses; and (2) transaction costs, including sales charges (loads) on purchase payments. This example is intended to help you understand your ongoing expenses (in dollars) of investing in the Fund and to compare these costs with the ongoing costs of investing in other mutual funds. The example is based on an investment of $1,000 at the beginning of the Fund's latest six-month period and held throughout the six months. Using the Tables Actual Expenses The first table below provides information about actual account values and actual expenses. You may use the information in this table, together with the amount you invested, to estimate the expenses that you paid over the period as follows: 1. Divide your account value by $1,000 Example: an $8,600 account value [DIVIDED BY] $1,000 = 8.6 2. Multiply the result in (1) above by the corresponding share class's number in the third row under the heading entitled "Expenses Paid During Period" to estimate the expenses you paid on your account during this period. Expenses Paid on a $1,000 Investment in Pioneer Bond Fund Based on actual returns from January 1, 2006 through June 30, 2006 Investor Share Class A B C Class R Y - ---------------------------------------------------------------------------------------------- Beginning Account $1,000.00 $1,000.00 $1,000.00 $1,000.00 $1,000.00 $1,000.00 Value On 1/1/06 Ending Account $ 963.79 $ 964.71 $ 964.82 $ 964.64 $ 965.33 $ 965.55 Value (after expenses) On 6/30/06 Expenses Paid $ 4.87 $ 9.26 $ 9.21 $ 3.60 $ 6.09 $ 2.83 During Period* * Expenses are equal to the Fund's annualized expense ratio of 1.00%, 1.90%, 1.89%, 0.74%, 1.25% and 0.58%, for Class A, Class B, Class C, Investor Class, Class R, and Class Y shares, respectively, multiplied by the average account value over the period, multiplied by 181/365 (to reflect the one-half year period). 12 Pioneer Bond Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Hypothetical Example for Comparison Purposes The table below provides information about hypothetical account values and hypothetical expenses based on the Fund's actual expense ratio and an assumed rate of return of 5% per year before expenses, which is not the Fund's actual return. The hypothetical account values and expenses may not be used to estimate the actual ending account balance or expenses you paid for the period. You may use this information to compare the ongoing costs of investing in the Fund and other funds. To do so, compare this 5% hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of the other funds. Please note that the expenses shown in the tables are meant to highlight your ongoing costs only and do not reflect any transaction costs, such as sales charges (loads) that are charged at the time of the transaction. Therefore, the table below is useful in comparing ongoing costs only and will not help you determine the relative total costs of owning different funds. In addition, if these transaction costs were included, your costs would have been higher. Expenses Paid on a $1,000 Investment in Pioneer Bond Fund Based on a hypothetical 5% per year return before expenses, reflecting the period from January 1, 2006 through June 30, 2006 Investor Share Class A B C Class R Y - ---------------------------------------------------------------------------------------------- Beginning Account $1,000.00 $1,000.00 $1,000.00 $1,000.00 $1,000.00 $1,000.00 Value On 7/1/05 Ending Account $1,019.84 $1,015.57 $1,015.42 $1,021.12 $1,018.60 $1,021.92 Value (after expenses) On 12/31/05 Expenses Paid $ 5.01 $ 9.49 $ 9.44 $ 3.71 $ 6.26 $ 2.91 During Period* * Expenses are equal to the Fund's annualized expense ratio of 1.00%, 1.70%, 1.89%, 0.74%, 1.25% and 0.58%, for Class A, Class B, Class C, Investor Class, Class R, and Class Y shares, respectively, multiplied by the average account value over the period, multiplied by 181/365 (to reflect the one-half year period). 13 Pioneer Bond Fund - -------------------------------------------------------------------------------- PORTFOLIO MANAGEMENT DISCUSSION 6/30/06 - -------------------------------------------------------------------------------- Against a backdrop of strong economic growth throughout the globe, inflation concerns grew steadily during the 12 months ended June 30, 2006. The dramatic increases in commodity prices - most notably in energy prices - added to fears that inflationary pressures were spreading throughout the general economy. Given these concerns, the U.S. Federal Reserve Board continued to raise short-term interest rates to relieve inflationary pressures and control economic growth. The Fed hiked its Fed funds rate eight successive times over the 12 months, from 3.25% to 5.25%. As the Fed acted, rates among securities of all maturities also rose, and bond prices generally declined. In the following interview, Kenneth J. Taubes discusses the factors that influenced Pioneer Bond Fund's performance during the 12 months ended June 30, 2006. Mr. Taubes, Director of Pioneer's Fixed Income Group, is responsible for the daily management of the Fund. Q: How did the Fund perform during the 12 months ended June 30, 2006? A: Pioneer Bond Fund's Class A shares had a total return of -1.25% for the fiscal year, at net asset value. During the same 12 months, the Lehman Aggregate Bond Index produced a total return of -0.81%. The average return of the 177 funds in Lipper's Corporate Debt, A-Rated, category was -1.29%. One June 30, the Fund's 30-day SEC yield was 4.28%. 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. Q: What were the primary factors influencing performance? A: It was a tough year in the bond market, given the unrelenting economic growth and the Federal Reserve Board's increasing concern about rising inflationary pressures. The Fed raised short-term rates at each of the board's eight meetings during the 12 months and rates rose in response across the board among securities of 14 Pioneer Bond Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- all maturities. Early in the 12 months, short-term rates rose faster, but as the period progressed rates across different maturities seemed to move in parallel fashion. Over the period, the yield on the six-month Treasury bill rose by about 190 basis points (1.9 percentage points). Yields of two-year Treasuries rose by 150 basis points, the yields of 10-year Treasuries climbed by 122 basis points, and the yields of 30-year Treasuries rose by 99 basis points. As these rate changes occurred, bond prices - especially among higher-quality securities - tended to depreciate, with most high-grade securities recording negative total returns. The most notable exceptions were issues with short maturities of two years and less, which were the best-performing over the six months. Corporate bonds, including high-yield securities, performed somewhat better than Treasuries, as the yield advantages of corporate bonds compensated for the erosion in the market value of high-yield bonds. Q: What were your principal strategies during the period? A: In general, as the year progressed, we became increasingly defensive to guard against the risks of a slowing economy as the impacts of the Federal Reserve's rate hikes worked their way through the economy. As interest rates rose, we gradually increased duration - a measure of a bond's price sensitivity to changes in interest rates - as longer-maturity bonds began to decline and started to offer greater value. The portfolio's effective duration at the end of the fiscal year, on June 30, 2006, was 5.04 years, compared with 4.81 years six months earlier. We also increased investments in Treasury Inflation Protected Securities (TIPS) for most of the period, although we did reduce our positions late in the fiscal year after these investments had performed particularly well. Over the 12 months, we gradually took profits from the Fund's investments in corporate bonds, including high-yield bonds as they began to appear increasingly expensive, while increasing the overall credit quality of the portfolio. In addition, we anticipated that corporate bonds would not perform as well as economic growth eventually begins to slow. The pick-up in merger-and-acquisition activity in the market also gave cause for concern. Such activity tends to favor equity investors over bond investors. Consequently, we increased our exposure to high-quality, mortgage-backed securities. 15 Pioneer Bond Fund - -------------------------------------------------------------------------------- PORTFOLIO MANAGEMENT DISCUSSION 6/30/06 (continued) - -------------------------------------------------------------------------------- At the end of the fiscal year, average credit quality was a strong AA, and 72.2% of assets were invested in Treasury and U.S. government agency securities, including agency-backed mortgage securities. Just 5.1% of Fund assets were invested in high-yield, below investment-grade bonds. Q: What types of investments had the greatest impact on Fund performance? A: Our position in TIPS helped performance, as did individual investments in bonds of Gazprom, the major Russian natural gas production and distribution company, and of Platinum Underwriters, a Bermuda-based property-and-casualty reinsurance corporation. While our investments in the corporate sector - both investment-grade and high-yield bonds - helped performance, the Fund's higher-quality focus meant that we did not fully participate in the superior performance of corporate bonds over the 12 months. Holding back results for the year was the investment in corporate bonds of automotive parts company Delphi, which filed for bankruptcy protection during the year. The investment in securities of Novelis, a major manufacturer producer of aluminum-based products for industrial customers, also detracted from results somewhat. Q: What is your investment outlook? A: We anticipate that we will see increased evidence that the Federal Reserve has been successful in slowing the rate of economic growth. At the end of the past fiscal year, the yield curve - reflecting the differences between yields of different maturities - was modestly inverted. This meant that some shorter-term yields were higher than some longer-term yields - a phenomenon that is inconsistent with the normal relationships of yields. In the past, this phenomenon has tended to presage a slowing in the economy. We also see a drying up of liquidity in the global markets because of widespread hikes in short-term interest rates by central banks across the globe. Given these factors, we believe it makes sense to lengthen the portfolio's duration and to increase investments in Treasury and high-quality mortgage securities. We believe these maneuvers could 16 Pioneer Bond Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- help protect the Fund in a slowing economy while positioning it for the time when the Federal Reserve ends its cycle of rate hikes. 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 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. Mortgage-Backed securities are also subject to pre-payments. 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. 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. Past performance is no guarantee of future results, and there is no guarantee that market forecasts discussed will be realized. 17 Pioneer Bond Fund - -------------------------------------------------------------------------- SCHEDULE OF INVESTMENTS 6/30/06 - -------------------------------------------------------------------------- Principal Amount S&P/Moody's USD ($) Ratings Value ASSET BACKED SECURITIES - 1.5% Transportation - 0.2% Airlines - 0.2% 1,381,858 A+/A2 Southwest Airlines Co., 7.67%, 1/2/14 $ 1,398,785 ------------ Total Transportation $ 1,398,785 ------------ Diversified Financials - 0.8% Other Diversified Finance Services - 0.8% 2,418,568 BB-/Ba2 Caithness Coso Fund Corp., 6.263%, 6/15/14 (144A) $ 2,368,745 1,597,720 BBB-/Baa2 PF Export Receivable Master Trust, 6.436%, 6/1/15 (144A) 1,597,449 2,671,220 BBB/Baa2 Power Receivables Finance, 6.29%, 1/1/12 (144A) 2,660,989 ------------ $ 6,627,183 ------------ Specialized Finance - 0.0% 90,000 AAA/Aaa MBNA Credit Card Master Note, Floating Rate Note, 12/15/08 $ 89,987 ------------ Total Diversified Financials $ 6,717,170 ------------ Utilities - 0.4% Electric Utilities - 0.4% 955,900 BBB-/Baa3 Empresa Electric, 8.625%, 4/30/13 (144A) $ 1,031,891 1,627,220 BBB-/Baa3 FPL Energy America Wind LLC, 6.639%, 6/20/23 (144A) 1,663,296 554,400 BB-/Ba2 FPL Energy Wind Funding, 6.876%, 6/27/17 (144A) 553,707 454,415 BB-/Ba2 Tenaska Alabama, 7.0%, 6/30/21 (144A) 442,880 ------------ $ 3,691,774 ------------ Total Utilities $ 3,691,774 ------------ Restaurants - 0.1% 835,000 BB/Ba3 Dunkin Brands Master Finance LLC, 8.28%, 6/20/31 (144A) $ 838,217 ------------ Total Restaurants $ 838,217 ------------ TOTAL ASSET BACKED SECURITIES (Cost $12,699,652) $ 12,645,946 ------------ 18 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund - -------------------------------------------------------------------------- - -------------------------------------------------------------------------- Principal Amount S&P/Moody's USD ($) Ratings Value COLLATERALIZED MORTGAGE OBLIGATIONS - 1.3% Diversified Financials - 0.2% Other Diversified Finance Services - 0.2% 1,150,000 NR/Ba1 Global Signal, 7.036%, 2/15/36 (144A) $ 1,148,423 525,000 NR/Ba2 Tower 2004-2A F, 6.376%, 12/15/14 515,665 ------------ Total Diversified Financials $ 1,664,088 ------------ Government - 1.1% 8,748,509 AAA/Aaa Freddie Mac, 6.1%, 9/15/18 $ 8,716,650 ------------ Total Government $ 8,716,650 ------------ TOTAL COLLATERALIZED MORTGAGE OBLIGATIONS (Cost $10,494,312) $ 10,380,738 ------------ CORPORATE BONDS - 25.6% Energy - 1.2% Integrated Oil & Gas - 0.8% 45,000 BBB/Baa2 Petro-Canada, 4.0%, 7/15/13 $ 39,809 2,000,000 A-/A1 Phillips Pete Co., 6.375%, 3/30/09 2,036,782 4,000,000 AA/Aa2 Texaco Capital Inc., 7.09%, 2/1/07 4,026,452 25,000 BBB+/Baa1 USX Corp., 6.85%, 3/1/08 25,459 ------------ $ 6,128,502 ------------ Oil & Gas Equipment And Services - 0.1% 875,000 B+/Ba3 Holly Energy Partners LP, 6.25%, 3/1/15 $ 800,625 ------------ Oil & Gas Exploration & Production - 0.3% 2,000,000 BBB/NR Gazprom International SA., 7.201%, 2/1/20 (144A) $ 2,027,500 75,000 BBB/Baa1 Pemex Project Funding Master, 9.125%, 10/13/10 82,125 650,000 BB+/Ba3 Southern Star Central Corp., 6.75%, 3/1/16 (144A) 624,000 ------------ $ 2,733,625 ------------ Oil & Gas Refining & Marketing - 0.0% 320,000 BBB/Baa2 Boardwalk Pipelines LLC, 5.5%, 2/1/17 $ 301,857 ------------ Oil & Gas Storage & Transportation - 0.0% 65,000 BBB+/Baa1 Kinder Morgan Energy Partners, 6.75%, 3/15/11 $ 66,402 ------------ Total Energy $ 10,031,011 ------------ Materials - 0.9% Aluminum - 0.2% 1,700,000 B/B1 Novelis Inc., 7.25%, 02/15/15 $ 1,632,000 ------------ Commodity Chemicals - 0.2% 625,000 B+/Ba3 Invista, 9.25%, 5/1/12 (144A) $ 656,250 1,500,000 BB-/Ba2 Nova Chemicals, Ltd., 6.5%, 1/15/12 1,380,000 ------------ $ 2,036,250 ------------ The accompanying notes are an integral part of these financial statements. 19 Pioneer Bond Fund - -------------------------------------------------------------------------------- SCHEDULE OF INVESTMENTS 6/30/06 (continued) - -------------------------------------------------------------------------------- Principal Amount S&P/Moody's USD ($) Ratings Value Construction Materials - 0.2% 2,000,000 A+/A1 Vulcan Materials Co., 6.0%, 4/1/09 $ 2,020,694 ------------ Fertilizers & Agricultural Chemicals - 0.0% 45,000 BBB+/Baa1 Potash Corp. Saskatchewan, 4.875%, 3/1/13 $ 42,326 ------------ Paper Packaging - 0.1% 703,000 B+/B1 Abitibi-Consolidated, Inc., 6.95%, 12/15/06 $ 706,515 ------------ Paper Products - 0.2% 1,300,000 B+/B1 Bowater Canada Finance, 7.95%, 11/15/11 $ 1,235,000 ------------ Total Materials $ 7,672,785 ------------ Capital Goods - 3.9% Aerospace & Defense - 0.5% 40,000 A/A2 Boeing Co., 5.125%, 2/15/13 $ 38,591 2,000,000 A/A2 Honeywell Inc., 7.0%, 3/15/07 2,014,734 2,145,000 A/A2 McDonnell Douglas Corp., 6.875%, 11/1/06 2,151,523 ------------ $ 4,204,848 ------------ Construction & Farm Machinery & Heavy Trucks - 1.4% 2,100,000 A/A2 Caterpillar Financial Services 2.5%, 10/3/06 $ 2,084,317 2,300,000 A/A2 Caterpillar Financial Services 3.10%, 5/15/07 2,251,148 1,000,000 A/A2 Caterpillar Inc., 6.55%, 5/1/11 1,039,113 6,000,000 A-/A3 Deere & Co., 7.0%, 3/15/12 6,334,458 ------------ $ 11,709,036 ------------ Electrical Component & Equipment - 0.2% 1,545,000 NR/Ba1 Orcal Geothermal, 6.21%, 12/30/20 (144A) $ 1,504,104 ------------ Industrial Conglomerates - 1.4% 12,000,000 AAA/Aaa GE Electric Co., 5.0%, 2/1/13 $ 11,494,068 ------------ Trading Companies & Distributors - 0.4% 2,350,000 BBB-/Baa3 Glencore Funding LLC, 6.0%, 4/15/14 (144A) $ 2,146,220 950,000 BB+/Ba1 Noble Group, Ltd., 6.625%, 3/17/15 (144A) 823,512 ------------ $ 2,969,732 ------------ Total Capital Goods $ 31,881,788 ------------ Consumer Durables & Apparel - 0.2% Home Furnishings - 0.2% 1,820,000 BBB-/Baa3 Mohawk Industries Inc., 6.125%, 1/15/16 $ 1,754,567 ------------ Total Consumer Durables & Apparel $ 1,754,567 ------------ Consumer Services - 0.3% Education Services - 0.3% 2,800,000 AAA/Aaa President & Fellows of Harvard, 6.3%, 10/1/37 $ 2,816,184 ------------ Total Consumer Services $ 2,816,184 ------------ 20 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund - -------------------------------------------------------------------------- - -------------------------------------------------------------------------- Principal Amount S&P/Moody's USD ($) Ratings Value Media - 0.6% Broadcasting & Cable TV - 0.0% 135,000 BBB+/Baa2 Comcast Corp., 5.3%, 1/15/14 $ 127,013 ------------ Media - 0.6% 5,000,000 BBB+/Baa2 Comcast Cable Corp., 6.75%, 1/30/11 $ 5,159,645 ------------ Total Media $ 5,286,658 ------------ Retailing - 0.1% Department Stores - 0.1% 1,000,000 BBB/Baa1 May Department Store Co., 7.9%, 10/15/07 $ 1,020,496 25,000 A/Baa1 Nordstrom, Inc., 5.625%, 1/15/09 24,879 ------------ $ 1,045,375 ------------ Total Retailing $ 1,045,375 ------------ Food & Drug Retailing - 0.5% Hypermarkets & Supercenters - 0.5% 4,500,000 AA/Aa2 Wal Mart Stores Inc., 5.45%, 8/1/06 $ 4,499,429 ------------ Total Food & Drug Retailing $ 4,499,429 ------------ Food Beverage & Tobacco - 0.7% Brewers - 0.0% 55,000 BBB+/Baa1 Miller Brewing Co., 5.5%, 8/15/13 (144A) $ 52,771 ------------ Packaged Foods & Meats - 0.7% 5,055,000 A+/A1 Unilever Capital Corp., 7.125%, 11/1/10 $ 5,307,507 ------------ Soft Drinks - 0.0% 55,000 A/A3 Bottling Group LLC, 5.0%, 11/15/13 $ 52,304 ------------ Total Food Beverage & Tobacco $ 5,412,582 ------------ Household & Personal Products - 0.2% Household Products - 0.2% 1,700,000 AA-/Aa2 Kimberly Clark Corp., 7.1%, 8/1/07 $ 1,721,794 ------------ Total Household & Personal Products $ 1,721,794 ------------ Health Care Equipment & Services - 0.3% Health Care Facilities - 0.3% 2,735,000 BB+/Ba2 HCA, Inc., 6.3%, 10/1/12 $ 2,572,325 ------------ Total Health Care Equipment & Services $ 2,572,325 ------------ Pharmaceuticals & Biotechnology - 0.1% Pharmaceuticals - 0.1% 1,000,000 AA/Aa2 Glaxosmithline Capital PlC, 2.375%, 4/16/07 $ 974,123 ------------ Total Pharmaceuticals & Biotechnology $ 974,123 ------------ The accompanying notes are an integral part of these financial statements. 21 Pioneer Bond Fund - -------------------------------------------------------------------------------- SCHEDULE OF INVESTMENTS 6/30/06 (continued) - -------------------------------------------------------------------------------- Principal Amount S&P/Moody's USD ($) Ratings Value Banks - 1.8% Diversified Banks - 0.4% 1,100,000 A+/Aa3 Nationsbank Corp., 7.75%, 8/15/15 $ 1,228,561 45,000 AA-/Aa2 US Bancorp, 3.125%, 3/15/08 43,223 2,000,000 AA-/Aa1 US Bank, 3.75%, 2/6/09 1,911,406 ------------ $ 3,183,190 ------------ Regional Banks - 1.4% 4,500,000 A+/Aa3 Branch Banking & Trust Co., 4.875%, 1/15/13 $ 4,284,540 1,000,000 AA-/Aa1 Fifth Third FTB, 2.7%, 1/30/07 984,290 3,000,000 AA+/Aa1 Province of British Columbia, 4.625%, 10/3/06 2,994,345 500,000 A+/Aa3 Suntrust Bank Atlanta, 6.375%, 4/1/11 511,907 3,159,000 A/A1 Suntrust Banks Inc., 7.375%, 7/1/06 3,159,000 ------------ $ 11,934,082 ------------ Total Banks $ 15,117,272 ------------ Diversified Financials - 2.8% Asset Management & Custody Banks - 1.9% 2,000,000 A/A1 Bank of New York, 4.95%, 3/15/15 $ 1,870,090 2,000,000 A/A2 Mellon Financial Co., 6.4%, 5/14/11 2,048,818 6,000,000 A+/A1 Northern Trust Co., 7.1%, 8/1/09 6,281,598 5,000,000 A+/A1 State Street Corp., 7.65%, 6/15/10 5,321,690 ------------ $ 15,522,196 ------------ Consumer Finance - 0.5% 2,055,000 B+/Ba2 Ford Motor Credit Co., 5.7%, 1/15/10 $ 1,800,050 2,340,000 A/A2 SLM Corp., Floating Rate Note, 7/25/14 2,138,198 ------------ $ 3,938,248 ------------ Investment Banking & Brokerage - 0.1% 1,275,000 B+/Ba2 E*Trade Financial Corp., 8.0%, 6/15/11 $ 1,300,500 ------------ Other Diversified Finance Services - 0.3% 1,000,000 A+/Aa3 Bank One Texas National, 6.25%, 2/15/08 $ 1,007,124 1,500,000 BBB-/Baa3 Bombardier Capital, Inc., 7.09%, 3/30/07 1,500,000 ------------ $ 2,507,124 ------------ Total Diversified Financials $ 23,268,068 ------------ Insurance - 5.4% Life & Health Insurance - 2.0% 1,000,000 A/A2 Metlife, 6.125%, 12/1/11 $ 1,017,163 2,830,000 B-/B2 Presidential Life Corp., 7.875%, 2/15/09 2,815,850 3,500,000 AA/Aa3 Protective Life, 4.0%, 10/7/09 3,364,155 2,850,000 BB+/Ba1 Provident Co., Inc., 7.0%, 7/15/18 2,751,604 6,000,000 AA-/A1 Prudential Funding LLC, 6.6%, 5/15/08 6,090,744 ------------ $ 16,039,516 ------------ 22 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund - -------------------------------------------------------------------------- - -------------------------------------------------------------------------- Principal Amount S&P/Moody's USD ($) Ratings Value Multi-Line Insurance - 1.4% 5,000,000 AA+/Aa2 Asif Global Financial XVIII, 3.85%, 11/26/07 (144A) $ 4,881,700 4,450,000 BB+/Ba1 Hanover Insurance Group, 7.625%, 10/15/25 4,460,827 1,950,000 A/Baa1 Loew Corp., 5.25%, 3/15/16 1,804,304 ------------ $ 11,146,831 ------------ Property & Casualty Insurance - 1.1% 3,000,000 AAA/Aaa Berkshire Hathway, Inc., 3.375%, 10/15/08 $ 2,856,051 1,000,000 A/A2 Chubb Corp., 6.0%, 11/15/11 1,005,935 2,965,000 BBB-/NR Kingsway America, Inc., 7.5%, 2/1/14 2,935,898 2,585,000 BB+/Baa3 Ohio Casualty Corp., 7.3%, 6/15/14 2,614,503 ------------ $ 9,412,387 ------------ Reinsurance - 0.9% 2,000,000 BBB-/Baa3 Odyssey Re Holdings, 7.65%, 11/1/13 $ 1,921,620 5,700,000 BBB/NA Platinum Underwriters HD, 7.50%, 6/1/17 5,591,660 ------------ $ 7,513,280 ------------ Total Insurance $ 44,112,014 ------------ Real Estate - 1.8% Real Estate Management & Development - 0.3% 2,200,000 BB-/Ba3 Forest City Enterprises, 7.625%, 6/1/15 $ 2,216,500 ------------ Real Estate Investment Trust- 1.5% 1,100,000 BBB-/Baa3 Colonial Reality LP, 6.15%, 4/15/13 $ 1,083,901 890,000 B/B1 Crescent Real Estate, 7.5%, 9/15/07 898,900 860,000 BBB-/Baa3 Health Care, Inc., 6.0%, 11/15/13 831,305 3,575,000 BBB-/Baa3 Health Care, Inc., 6.2%, 6/1/16 3,472,937 935,000 BBB-/Baa3 Health Care, Inc., 8.0%, 9/12/12 1,006,292 775,000 BBB/Baa2 Hospitality Properties Trust, 5.125%, 2/15/15 710,906 1,724,000 BB/Ba2 Host Marriott LP, 6.375%, 3/15/15 1,620,560 1,815,000 B+/B1 Trustreet Properties Inc., 7.5%, 4/1/15 1,787,775 985,000 BB+/Ba2 Ventas Realty Capital Corp., 7.125%, 6/1/15 (144A) 985,000 ------------ $ 12,397,576 ------------ Total Real Estate $ 14,614,076 ------------ Software & Services - 0.4% Data Processing & Outsourced Services - 0.4% 3,000,000 A+/A2 First Data Corp., 4.7%, 11/01/06 $ 2,990,673 ------------ Total Software & Services $ 2,990,673 ------------ Technology Hardware & Equipment - 1.1% Communications Equipment - 0.3% 2,395,000 BBB/Baa3 Corning, Inc., 5.9%, 3/15/14 $ 2,367,977 ------------ The accompanying notes are an integral part of these financial statements. 23 Pioneer Bond Fund - -------------------------------------------------------------------------------- SCHEDULE OF INVESTMENTS 6/30/06 (continued) - -------------------------------------------------------------------------------- Principal Amount S&P/Moody's USD ($) Ratings Value Computer Hardware - 0.8% 5,000,000 A+/A1 International Business Machine, 5.375%, 2/1/09 $ 4,979,445 2,000,000 BBB-/Baa3 NCR Corp., 7.125%, 6/15/09 2,041,656 ------------ $ 7,021,101 ------------ Total Technology Hardware & Equipment $ 9,389,078 ------------ Semiconductors - 0.3% 2,195,000 BBB-/Baa3 Chartered Semiconductor, 6.375%, 8/3/15 $ 2,095,481 ------------ Total Semiconductors $ 2,095,481 ------------ Telecommunication Services - 0.2% Integrated Telecommunication Services - 0.2% 1,500,000 A/A3 GTE California Inc., 6.7%, 9/1/09 $ 1,523,587 ------------ Total Telecommunication Services $ 1,523,587 ------------ Utilities - 2.6% Electric Utilities - 1.2% 1,700,000 A/A2 Alabama Power Co., 7.125%, 10/1/07 $ 1,728,250 711,468 BBB-/Baa3 Crocket Cogeneration, 5.869%, 3/30/25 (144A) 665,258 2,050,000 BBB+/Baa3 Entergy Gulf States, 5.7%, 6/1/15 1,928,751 3,000,000 A/A2 Georgia Power Co., 4.0%, 1/15/11 2,795,640 1,555,000 BBB-/Baa3 Kiowa Power Partners LLC, 5.737%, 3/30/21 (144A) 1,442,620 1,000,000 BB-/Ba3 MSW Energy Holdings, 7.375%, 9/1/10 1,000,000 ------------ $ 9,560,519 ------------ Independent Power Producer & Energy Traders - 0.9% 3,100,000 A/A2 Baltimore Gas & Electric Co., 7.5%, 1/15/07 $ 3,126,263 5,000,000 BBB/A3 Duke Energy Corp., 6.25%, 1/15/12 5,086,095 ------------ $ 8,212,358 ------------ Multi-Utilities - 0.4% 3,500,000 A-/A1 Wisconsin Electric Power Co., 6.625%, 11/15/06 $ 3,510,301 ------------ Total Utilities $ 21,283,178 ------------ TOTAL CORPORATE BONDS (Cost $212,044,146) $210,062,048 ------------ 24 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund - -------------------------------------------------------------------------- - -------------------------------------------------------------------------- Principal Amount S&P/Moody's USD ($) Ratings Value U.S. GOVERNMENT AND AGENCY OBLIGATIONS - 70.9% 65,000 AAA/Aaa Federal Home Loan Bank, 3.875%, 6/14/13 $ 58,934 195,000 AAA/Aaa Federal Home Loan Bank, 6.0%, 4/15/32 197,080 5,658,340 AAA/Aaa Federal Home Loan Mortgage Corp., 4.5%, 10/1/20 5,342,105 14,115,381 AAA/Aaa Federal Home Loan Mortgage Corp., 4.5%, 10/1/20 13,326,496 9,751,809 AAA/Aaa Federal Home Loan Mortgage Corp., 4.5%, 10/1/35 8,847,051 419,761 AAA/Aaa Federal Home Loan Mortgage Corp., 4.5%, 11/1/18 397,029 5,669,060 AAA/Aaa Federal Home Loan Mortgage Corp., 4.5%, 11/1/20 5,352,226 2,605,352 AAA/Aaa Federal Home Loan Mortgage Corp., 4.5%, 3/1/20 2,459,743 684,476 AAA/Aaa Federal Home Loan Mortgage Corp., 4.5%, 4/1/35 622,509 3,103,982 AAA/Aaa Federal Home Loan Mortgage Corp., 4.5%, 5/1/20 2,930,506 4,807,126 AAA/Aaa Federal Home Loan Mortgage Corp., 4.5%, 8/1/20 4,544,082 10,750,998 AAA/Aaa Federal Home Loan Mortgage Corp., 4.5%, 10/1/35 9,753,536 787,207 AAA/Aaa Federal Home Loan Mortgage Corp., 4.5%, 11/1/35 714,171 5,784,724 AAA/Aaa Federal Home Loan Mortgage Corp., 4.5%, 9/1/35 5,248,026 197,396 AAA/Aaa Federal Home Loan Mortgage Corp., 4.5%, 9/1/35 179,082 8,519,230 AAA/Aaa Federal Home Loan Mortgage Corp., 5.0%, 10/1/20 8,202,190 2,724,415 AAA/Aaa Federal Home Loan Mortgage Corp., 5.0%, 6/1/35 2,546,313 660,470 AAA/Aaa Federal Home Loan Mortgage Corp., 5.0%, 7/1/35 617,293 1,536,478 AAA/Aaa Federal Home Loan Mortgage Corp., 5.5%, 11/1/34 1,479,669 1,754,053 AAA/Aaa Federal Home Loan Mortgage Corp., 5.5%, 11/1/34 1,692,744 4,851,577 AAA/Aaa Federal Home Loan Mortgage Corp., 5.5%, 11/1/35 4,662,928 1,716,239 NR/NR Federal Home Loan Mortgage Corp., 5.5%, 12/1/18 1,690,339 4,797,743 AAA/Aaa Federal Home Loan Mortgage Corp., 5.5%, 8/1/35 4,611,188 2,276,874 AAA/Aaa Federal Home Loan Mortgage Corp., 5.5%, 9/1/33 2,196,564 73,634 NR/NR Federal Home Loan Mortgage Corp., 6.0% 3/1/33 72,720 278,362 NR/NR Federal Home Loan Mortgage Corp., 6.0%, 1/1/33 274,906 278,555 AAA/Aaa Federal Home Loan Mortgage Corp., 6.0%, 1/1/34 275,098 629,395 AAA/Aaa Federal Home Loan Mortgage Corp., 6.0%, 1/1/34 620,949 1,174,628 NR/NR Federal Home Loan Mortgage Corp., 6.0%, 12/1/33 1,160,047 239,344 NR/NR Federal Home Loan Mortgage Corp., 6.0%, 12/1/33 237,127 277,858 NR/NR Federal Home Loan Mortgage Corp., 6.0%, 12/1/33 274,409 643,790 NR/NR Federal Home Loan Mortgage Corp., 6.0%, 2/1/33 636,631 525,536 NR/NR Federal Home Loan Mortgage Corp., 6.0%, 3/1/33 519,377 1,864,865 AAA/Aaa Federal Home Loan Mortgage Corp., 6.0%, 3/1/33 1,843,010 1,090,832 AAA/Aaa Federal Home Loan Mortgage Corp., 6.0%, 4/1/35 1,074,684 416,821 AAA/Aaa Federal Home Loan Mortgage Corp., 6.0%, 5/1/17 417,638 4,415,196 AAA/Aaa Federal Home Loan Mortgage Corp., 6.0%, 5/1/34 4,355,948 780,632 AAA/Aaa Federal Home Loan Mortgage Corp., 6.0%, 5/1/34 770,157 2,813,277 AAA/Aaa Federal Home Loan Mortgage Corp., 6.0%, 6/1/35 2,771,631 1,166,831 AAA/Aaa Federal Home Loan Mortgage Corp., 6.0%, 6/1/35 1,149,558 1,900,137 AAA/Aaa Federal Home Loan Mortgage Corp., 6.0%, 8/1/34 1,874,639 The accompanying notes are an integral part of these financial statements. 25 Pioneer Bond Fund - -------------------------------------------------------------------------------- SCHEDULE OF INVESTMENTS 6/30/06 (continued) - -------------------------------------------------------------------------------- Principal Amount S&P/Moody's USD ($) Ratings Value U.S. GOVERNMENT AND AGENCY OBLIGATIONS - (continued) 1,401,409 AAA/Aaa Federal Home Loan Mortgage Corp., 6.0%, 9/1/33 $ 1,384,013 53,702 AAA/Aaa Federal Home Loan Mortgage Corp., 6.5%, 1/1/29 54,283 526,633 AAA/Aaa Federal Home Loan Mortgage Corp., 6.5%, 10/1/33 533,171 358,369 AAA/Aaa Federal Home Loan Mortgage Corp., 6.5%, 10/1/33 362,819 59,672 NR/NR Federal Home Loan Mortgage Corp., 6.5%, 11/1/33 60,433 2,810,730 AAA/Aaa Federal Home Loan Mortgage Corp., 6.5%, 3/1/13 2,832,165 124,855 NR/NR Federal Home Loan Mortgage Corp., 6.5%, 7/1/32 126,029 9,970 NR/NR Federal Home Loan Mortgage Corp., 7.0%, 12/1/30 10,217 4,424 AAA/Aaa Federal Home Loan Mortgage Corp., 8.0%, 4/1/08 4,471 980 NR/NR Federal Home Loan Mortgage Corp., 8.0%, 9/15/06 979 3,641,305 AAA/Aaa Federal National Mortgage Association, 4.5%, 10/1/35 3,301,147 3,318,865 AAA/Aaa Federal National Mortgage Association, 4.5%, 10/1/35 3,008,828 6,189,148 AAA/Aaa Federal National Mortgage Association, 4.5%, 11/1/20 5,850,232 8,510,489 AAA/Aaa Federal National Mortgage Association, 4.5%, 4/1/19 8,054,441 179,224 AAA/Aaa Federal National Mortgage Association, 4.78%, 12/1/12 171,434 3,033,753 AAA/Aaa Federal National Mortgage Association, 5.0%, 10/1/20 2,922,716 239,297 AAA/Aaa Federal National Mortgage Association, 5.0%, 12/1/17 230,994 602,644 AAA/Aaa Federal National Mortgage Association, 5.0%, 2/1/20 580,587 166,215 AAA/Aaa Federal National Mortgage Association, 5.0%, 3/1/33 156,126 124,775 AAA/Aaa Federal National Mortgage Association, 5.0%, 5/1/34 117,008 140,000 AAA/Aaa Federal National Mortgage Association, 5.24%, 8/7/18 132,809 7,913,194 AAA/Aaa Federal National Mortgage Association, 5.5%, 12/1/17 7,782,226 1,066,215 AAA/Aaa Federal National Mortgage Association, 5.5%, 12/1/18 1,048,140 218,411 AAA/Aaa Federal National Mortgage Association, 5.5%, 2/1/18 214,847 1,675,879 AAA/Aaa Federal National Mortgage Association, 5.5%, 3/1/25 1,625,941 26 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund - -------------------------------------------------------------------------- - -------------------------------------------------------------------------- Principal Amount S&P/Moody's USD ($) Ratings Value U.S. GOVERNMENT AND AGENCY OBLIGATIONS - (continued) 4,920,093 AAA/Aaa Federal National Mortgage Association, 5.5%, 3/1/36 $ 4,725,954 818,443 AAA/Aaa Federal National Mortgage Association, 5.5%, 4/1/19 804,898 11,797,469 AAA/Aaa Federal National Mortgage Association, 5.5%, 4/1/36 11,331,960 9,007,204 AAA/Aaa Federal National Mortgage Association, 5.5%, 5/1/36 8,651,794 3,995,282 AAA/Aaa Federal National Mortgage Association, 5.5%, 5/1/36 3,837,635 3,995,545 AAA/Aaa Federal National Mortgage Association, 5.5%, 5/1/36 3,837,887 82,847 AAA/Aaa Federal National Mortgage Association, 5.5%, 7/1/23 80,660 2,127,637 AAA/Aaa Federal National Mortgage Association, 5.5%, 7/1/33 2,052,532 193,738 AAA/Aaa Federal National Mortgage Association, 5.5%, 9/1/17 190,531 3,295,445 AAA/Aaa Federal National Mortgage Association, 5.5%, 9/1/19 3,237,421 855,841 NR/NR Federal National Mortgage Association, 6.0% 2/1/33 845,529 7,517 AAA/Aaa Federal National Mortgage Association, 6.0%, 1/1/29 7,435 9,867 AAA/Aaa Federal National Mortgage Association, 6.0%, 1/1/29 10,004 27,460 AAA/Aaa Federal National Mortgage Association, 6.0%, 1/1/32 27,154 792,679 AAA/Aaa Federal National Mortgage Association, 6.0%, 10/1/32 783,127 247,190 AAA/Aaa Federal National Mortgage Association, 6.0%, 10/1/34 243,785 223,152 NR/NR Federal National Mortgage Association, 6.0%, 11/1/32 220,463 265,751 AAA/Aaa Federal National Mortgage Association, 6.0%, 11/1/33 262,380 162,416 AAA/Aaa Federal National Mortgage Association, 6.0%, 11/1/34 160,179 83,588 NR/NR Federal National Mortgage Association, 6.0%, 2/1/32 82,636 The accompanying notes are an integral part of these financial statements. 27 Pioneer Bond Fund - -------------------------------------------------------------------------------- SCHEDULE OF INVESTMENTS 6/30/06 (continued) - -------------------------------------------------------------------------------- Principal Amount S&P/Moody's USD ($) Ratings Value U.S. GOVERNMENT AND AGENCY OBLIGATIONS - (continued) 43,502 AAA/Aaa Federal National Mortgage Association, 6.0%, 2/1/35 $ 42,902 119,329 AAA/Aaa Federal National Mortgage Association, 6.0%, 2/1/35 117,685 70,002 AAA/Aaa Federal National Mortgage Association, 6.0%, 3/1/33 69,113 2,193,522 NR/NR Federal National Mortgage Association, 6.0%, 4/1/33 2,165,691 2,733,446 AAA/Aaa Federal National Mortgage Association, 6.0%, 4/1/35 2,698,764 80,156 AAA/Aaa Federal National Mortgage Association, 6.0%, 4/1/36 78,906 72,571 AAA/Aaa Federal National Mortgage Association, 6.0%, 5/1/35 71,484 1,441,565 AAA/Aaa Federal National Mortgage Association, 6.0%, 5/1/35 1,419,977 201,129 AAA/Aaa Federal National Mortgage Association, 6.0%, 5/1/35 198,117 74,797 AAA/Aaa Federal National Mortgage Association, 6.0%, 5/1/36 73,630 423,173 AAA/Aaa Federal National Mortgage Association, 6.0%, 6/1/16 424,707 447,125 AAA/Aaa Federal National Mortgage Association, 6.0%, 6/1/35 440,429 1,379,855 AAA/Aaa Federal National Mortgage Association, 6.0%, 7/1/33 1,362,348 1,983,133 NR/NR Federal National Mortgage Association, 6.0%, 7/1/33 1,957,971 236,186 AAA/Aaa Federal National Mortgage Association, 6.0%, 7/1/35 232,649 58,435 AAA/Aaa Federal National Mortgage Association, 6.0%, 8/1/32 57,730 1,960,071 AAA/Aaa Federal National Mortgage Association, 6.0%, 8/1/34 1,929,506 13,943 AAA/Aaa Federal National Mortgage Association, 6.0%, 9/1/29 13,791 8,743 AAA/Aaa Federal National Mortgage Association, 6.0%, 9/1/32 8,638 216,048 AAA/Aaa Federal National Mortgage Association, 6.0%, 9/1/34 213,072 28 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Principal Amount S&P/Moody's USD ($) Ratings Value U.S. GOVERNMENT AND AGENCY OBLIGATIONS - (continued) 996,202 AAA/Aaa Federal National Mortgage Association, 6.0%, 9/1/34 $ 982,481 3,674,355 AAA/Aaa Federal National Mortgage Association, 6.0%, 9/1/34 3,623,746 187,912 AAA/Aaa Federal National Mortgage Association, 6.0%, 9/1/34 185,324 8,622,565 AAA/Aaa Federal National Mortgage Association, 6.0%, 7/1/35 8,503,801 84,065 NR/NR Federal National Mortgage Association, 6.5%, 10/1/31 84,832 38,890 NR/NR Federal National Mortgage Association, 6.5%, 10/1/31 39,244 255,955 NR/NR Federal National Mortgage Association, 6.5%, 10/1/32 258,214 91,577 NR/NR Federal National Mortgage Association, 6.5%, 2/1/32 92,413 167,305 NR/NR Federal National Mortgage Association, 6.5%, 2/1/32 168,782 277,257 NR/NR Federal National Mortgage Association, 6.5%, 3/1/32 279,704 14,835 NR/NR Federal National Mortgage Association, 6.5%, 4/1/31 14,971 104,922 NR/NR Federal National Mortgage Association, 6.5%, 5/1/31 105,879 194,874 NR/NR Federal National Mortgage Association, 6.5%, 6/1/31 196,714 73,162 AAA/Aaa Federal National Mortgage Association, 6.5%, 7/1/29 73,912 35,029 AAA/Aaa Federal National Mortgage Association, 6.5%, 7/1/34 35,234 87,734 NR/NR Federal National Mortgage Association, 6.5%, 8/1/31 88,534 96,787 NR/NR Federal National Mortgage Association, 6.5%, 9/1/31 97,670 139,026 NR/NR Federal National Mortgage Association, 7.0%, 1/1/32 142,448 39,627 NR/NR Federal National Mortgage Association, 7.0%, 10/25/07 39,726 10,399 NR/NR Federal National Mortgage Association, 7.0%, 12/1/30 10,660 The accompanying notes are an integral part of these financial statements. 29 Pioneer Bond Fund - -------------------------------------------------------------------------------- SCHEDULE OF INVESTMENTS 6/30/06 (continued) - -------------------------------------------------------------------------------- Principal Amount S&P/Moody's USD ($) Ratings Value U.S. GOVERNMENT AND AGENCY OBLIGATIONS - (continued) 34,157 NR/NR Federal National Mortgage Association, 7.0%, 12/1/30 $ 35,015 170,971 NR/NR Federal National Mortgage Association, 7.0%, 12/1/31 175,179 13,217 AAA/Aaa Federal National Mortgage Association, 7.0%, 3/1/12 13,460 68,201 NR/NR Federal National Mortgage Association, 7.0%, 4/1/31 69,914 43,118 NR/NR Federal National Mortgage Association, 7.0%, 7/1/22 44,310 112,248 NR/NR Federal National Mortgage Association, 7.0%, 8/1/31 115,011 60,253 NR/NR Federal National Mortgage Association, 7.0%, 9/1/31 61,736 4,519 NR/NR Federal National Mortgage Association, 7.5%, 4/1/30 4,682 9,536 NR/NR Federal National Mortgage Association, 7.5%, 8/1/20 9,909 3,655 AAA/Aaa Federal National Mortgage Association, 8.0%, 1/1/31 3,857 2,870 AAA/Aaa Federal National Mortgage Association, 8.0%, 10/1/30 3,029 11,828 AAA/Aaa Federal National Mortgage Association, 8.0%, 2/1/29 12,500 2,883 AAA/Aaa Federal National Mortgage Association, 8.0%, 2/1/30 3,046 1,782 AAA/Aaa Federal National Mortgage Association, 8.0%, 2/1/30 1,883 45,271 AAA/Aaa Federal National Mortgage Association, 8.0%, 3/1/31 47,832 7,854 AAA/Aaa Federal National Mortgage Association, 8.0%, 4/1/20 8,291 3,308 AAA/Aaa Federal National Mortgage Association, 8.0%, 4/1/30 3,491 2,084 AAA/Aaa Federal National Mortgage Association, 8.0%, 5/1/31 2,199 2,124 AAA/Aaa Federal National Mortgage Association, 8.0%, 7/1/30 2,241 13,678 NR/NR Federal National Mortgage Association, 10.3%, 4/25/19 14,358 30 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Principal Amount S&P/Moody's USD ($) Ratings Value U.S. GOVERNMENT AND AGENCY OBLIGATIONS - (continued) 7,751 NR/NR Federal National Mortgage Association, 10.3%, 4/25/19 $ 8,889 2,226,315 AAA/Aaa Government National Mortgage Association II, 4.5%, 1/20/35 2,021,608 878,862 AAA/Aaa Government National Mortgage Association II, 4.5%, 12/20/34 798,794 196,669 AAA/Aaa Government National Mortgage Association II, 5.5%, 11/20/34 189,996 322,566 NR/NR Government National Mortgage Association II, 5.5%, 2/20/34 311,621 1,877,967 AAA/Aaa Government National Mortgage Association II, 5.5%, 3/20/34 1,814,242 6,677,381 AAA/Aaa Government National Mortgage Association II, 6.0%, 11/20/33 6,616,076 221,543 NR/NR Government National Mortgage Association II, 7.0%, 1/20/29 227,102 183,899 AAA/Aaa Government National Mortgage Association, 4.5%, 1/15/35 168,885 1,358,872 AAA/Aaa Government National Mortgage Association, 4.5%, 10/15/33 1,250,052 1,366,410 AAA/Aaa Government National Mortgage Association, 4.5%, 10/15/33 1,256,986 2,054,543 AAA/Aaa Government National Mortgage Association, 4.5%, 10/15/35 1,886,812 129,688 AAA/Aaa Government National Mortgage Association, 4.5%, 2/15/34 119,210 200,231 AAA/Aaa Government National Mortgage Association, 4.5%, 3/15/35 183,885 647,980 AAA/Aaa Government National Mortgage Association, 4.5%, 3/15/35 595,079 1,835,012 AAA/Aaa Government National Mortgage Association, 4.5%, 4/15/35 1,685,203 685,738 AAA/Aaa Government National Mortgage Association, 4.5%, 4/15/35 629,755 304,269 AAA/Aaa Government National Mortgage Association, 4.5%, 4/15/35 279,429 218,323 AAA/Aaa Government National Mortgage Association, 4.5%, 5/15/34 200,684 42,576 AAA/Aaa Government National Mortgage Association, 4.5%, 6/15/34 39,136 The accompanying notes are an integral part of these financial statements. 31 Pioneer Bond Fund - -------------------------------------------------------------------------------- SCHEDULE OF INVESTMENTS 6/30/06 (continued) - -------------------------------------------------------------------------------- Principal Amount S&P/Moody's USD ($) Ratings Value U.S. GOVERNMENT AND AGENCY OBLIGATIONS - (continued) 472,464 AAA/Aaa Government National Mortgage Association, 4.5%, 7/15/33 $ 434,628 418,332 AAA/Aaa Government National Mortgage Association, 4.5%, 8/15/33 384,832 2,196,074 AAA/Aaa Government National Mortgage Association, 4.5%, 8/15/33 2,020,210 1,633,626 AAA/Aaa Government National Mortgage Association, 4.5%, 8/15/33 1,502,804 1,058,634 AAA/Aaa Government National Mortgage Association, 4.5%, 9/15/33 973,858 1,662,908 AAA/Aaa Government National Mortgage Association, 4.5%, 9/15/33 1,529,740 385,661 AAA/Aaa Government National Mortgage Association, 4.5%, 9/15/35 354,176 1,988,824 AAA/Aaa Government National Mortgage Association, 4.5%, 9/15/35 1,826,458 1,629,385 AAA/Aaa Government National Mortgage Association, 5.0%, 4/15/34 1,543,917 1,797,597 AAA/Aaa Government National Mortgage Association, 5.0%, 4/15/35 1,701,823 880,651 AAA/Aaa Government National Mortgage Association, 5.0%, 7/15/19 855,064 15,557 AAA/Aaa Government National Mortgage Association, 5.0%, 7/15/19 15,105 1,565,159 AAA/Aaa Government National Mortgage Association, 5.5%, 1/15/35 1,517,789 16,409,241 AAA/Aaa Government National Mortgage Association, 5.5%, 1/15/36 15,907,946 366,452 AAA/Aaa Government National Mortgage Association, 5.5%, 10/15/17 362,389 205,291 AAA/Aaa Government National Mortgage Association, 5.5%, 10/15/33 199,235 994,781 AAA/Aaa Government National Mortgage Association, 5.5%, 10/15/34 965,064 947,251 AAA/Aaa Government National Mortgage Association, 5.5%, 10/15/35 918,582 957,171 AAA/Aaa Government National Mortgage Association, 5.5%, 10/15/35 928,202 1,918,585 AAA/Aaa Government National Mortgage Association, 5.5%, 10/15/35 1,860,519 32 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Principal Amount S&P/Moody's USD ($) Ratings Value U.S. GOVERNMENT AND AGENCY OBLIGATIONS - (continued) 639,310 AAA/Aaa Government National Mortgage Association, 5.5%, 11/15/18 $ 632,042 1,950,260 AAA/Aaa Government National Mortgage Association, 5.5%, 11/15/34 1,891,999 196,120 AAA/Aaa Government National Mortgage Association, 5.5%, 12/15/18 193,890 41,021 AAA/Aaa Government National Mortgage Association, 5.5%, 12/15/34 39,796 2,721,349 AAA/Aaa Government National Mortgage Association, 5.5%, 2/15/35 2,638,987 1,572,358 AAA/Aaa Government National Mortgage Association, 5.5%, 2/15/35 1,524,771 16,145 AAA/Aaa Government National Mortgage Association, 5.5%, 4/15/19 15,958 1,665,827 AAA/Aaa Government National Mortgage Association, 5.5%, 4/20/34 1,609,300 1,688,675 AAA/Aaa Government National Mortgage Association, 5.5%, 5/15/35 1,637,567 2,491,568 AAA/Aaa Government National Mortgage Association, 5.5%, 6/15/35 2,416,160 2,696,327 AAA/Aaa Government National Mortgage Association, 5.5%, 7/15/34 2,615,778 9,200,154 AAA/Aaa Government National Mortgage Association, 5.5%, 7/15/35 8,921,709 9,443,589 AAA/Aaa Government National Mortgage Association, 5.5%, 7/15/35 9,157,777 1,889,847 AAA/Aaa Government National Mortgage Association, 5.5%, 8/15/19 1,867,907 2,158,865 AAA/Aaa Government National Mortgage Association, 5.5%, 8/15/19 2,133,802 156,235 AAA/Aaa Government National Mortgage Association, 5.5%, 8/15/33 151,626 9,114,183 AAA/Aaa Government National Mortgage Association, 5.5%, 8/15/35 8,838,340 1,756,754 AAA/Aaa Government National Mortgage Association, 5.5%, 9/15/33 1,704,927 384,213 NR/NR Government National Mortgage Association, 6.0%, 1/15/33 381,646 927,878 NR/NR Government National Mortgage Association, 6.0%, 1/15/33 921,820 The accompanying notes are an integral part of these financial statements. 33 Pioneer Bond Fund - -------------------------------------------------------------------------------- SCHEDULE OF INVESTMENTS 6/30/06 (continued) - -------------------------------------------------------------------------------- Principal Amount S&P/Moody's USD ($) Ratings Value U.S. GOVERNMENT AND AGENCY OBLIGATIONS - (continued) 300,674 NR/NR Government National Mortgage Association, 6.0%, 10/15/32 $ 298,707 468,555 AAA/Aaa Government National Mortgage Association, 6.0%, 10/15/33 465,424 1,000,301 AAA/Aaa Government National Mortgage Association, 6.0%, 10/15/34 993,374 137,869 NR/NR Government National Mortgage Association, 6.0%, 11/15/32 136,967 1,239,944 AAA/Aaa Government National Mortgage Association, 6.0%, 11/15/34 1,231,357 235,327 AAA/Aaa Government National Mortgage Association, 6.0%, 2/15/33 233,754 16,751 NR/NR Government National Mortgage Association, 6.0%, 3/15/32 16,641 492,420 AAA/Aaa Government National Mortgage Association, 6.0%, 3/15/33 489,130 397,585 NR/NR Government National Mortgage Association, 6.0%, 3/15/33 394,928 655,418 NR/NR Government National Mortgage Association, 6.0%, 3/15/33 651,039 1,541,107 Aaa/AAA Government National Mortgage Association, 6.0%, 3/15/33 1,530,811 806,103 AAA/Aaa Government National Mortgage Association, 6.0%, 3/15/33 800,844 1,020,901 NR/NR Government National Mortgage Association, 6.0%, 3/15/33 1,014,250 5,232 NR/NR Government National Mortgage Association, 6.0%, 4/15/14 5,269 487,110 NR/NR Government National Mortgage Association, 6.0%, 4/15/33 483,855 630,471 AAA/Aaa Government National Mortgage Association, 6.0%, 5/15/17 635,350 904,112 NR/NR Government National Mortgage Association, 6.0%, 5/15/33 898,072 119,019 AAA/Aaa Government National Mortgage Association, 6.0%, 6/15/17 119,940 87,961 AAA/NR Government National Mortgage Association, 6.0%, 6/15/33 87,374 689,562 NR/NR Government National Mortgage Association, 6.0%, 7/15/33 653,267 34 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Principal Amount S&P/Moody's USD ($) Ratings Value U.S. GOVERNMENT AND AGENCY OBLIGATIONS - (continued) 15,997 AAA/Aaa Government National Mortgage Association, 6.0%, 8/15/13 $ 16,084 66,988 AAA/Aaa Government National Mortgage Association, 6.0%, 8/15/32 66,575 967,383 AAA/Aaa Government National Mortgage Association, 6.0%, 9/15/19 974,771 262,929 AAA/Aaa Government National Mortgage Association, 6.0%, 9/15/32 261,208 34,549 NR/NR Government National Mortgage Association, 6.0%, 9/15/32 34,323 401,263 AAA/Aaa Government National Mortgage Association, 6.0%, 9/15/34 398,484 4,608,479 AAA/Aaa Government National Mortgage Association, 6.0%, 9/15/35 4,572,502 82,746 AAA/Aaa Government National Mortgage Association, 6.5%, 1/15/29 84,008 730,571 AAA/Aaa Government National Mortgage Association, 6.5%, 1/15/32 740,310 3,304,595 AAA/Aaa Government National Mortgage Association, 6.5%, 1/15/33 3,351,453 34,329 AAA/Aaa Government National Mortgage Association, 6.5%, 1/15/33 34,794 128,760 AAA/Aaa Government National Mortgage Association, 6.5%, 1/15/34 130,408 182,287 AAA/Aaa Government National Mortgage Association, 6.5%, 1/15/34 184,620 50,964 AAA/Aaa Government National Mortgage Association, 6.5%, 1/15/35 51,611 216,875 NR/NR Government National Mortgage Association, 6.5%, 10/15/31 219,882 757,197 AAA/Aaa Government National Mortgage Association, 6.5%, 10/15/31 767,692 49,923 AAA/Aaa Government National Mortgage Association, 6.5%, 10/15/31 50,615 832,751 AAA/Aaa Government National Mortgage Association, 6.5%, 10/15/32 843,852 11,772 AAA/Aaa Government National Mortgage Association, 6.5%, 10/15/33 11,926 41,134 AAA/Aaa Government National Mortgage Association, 6.5%, 11/15/31 41,704 The accompanying notes are an integral part of these financial statements. 35 Pioneer Bond Fund - -------------------------------------------------------------------------------- SCHEDULE OF INVESTMENTS 6/30/06 (continued) - -------------------------------------------------------------------------------- Principal Amount S&P/Moody's USD ($) Ratings Value U.S. GOVERNMENT AND AGENCY OBLIGATIONS - (continued) 495,233 AAA/Aaa Government National Mortgage Association, 6.5%, 11/15/32 $ 502,196 2,991,647 AAA/Aaa Government National Mortgage Association, 6.5%, 12/15/32 3,032,710 12,634 AAA/Aaa Government National Mortgage Association, 6.5%, 2/15/29 12,826 49,302 NR/NR Government National Mortgage Association, 6.5%, 2/15/29 50,054 281,230 NR/NR Government National Mortgage Association, 6.5%, 2/15/32 284,979 427,580 AAA/Aaa Government National Mortgage Association, 6.5%, 2/15/34 433,054 99,976 AAA/Aaa Government National Mortgage Association, 6.5%, 3/15/29 101,501 345,795 NR/NR Government National Mortgage Association, 6.5%, 3/15/29 351,071 74,573 NR/NR Government National Mortgage Association, 6.5%, 3/15/29 75,711 90,091 NR/NR Government National Mortgage Association, 6.5%, 3/15/31 91,340 119,300 AAA/Aaa Government National Mortgage Association, 6.5%, 3/15/32 120,891 798,859 AAA/Aaa Government National Mortgage Association, 6.5%, 3/15/35 809,001 654,625 AAA/Aaa Government National Mortgage Association, 6.5%, 4/15/31 663,698 29,846 AAA/Aaa Government National Mortgage Association, 6.5%, 4/15/32 30,244 137,596 AAA/Aaa Government National Mortgage Association, 6.5%, 4/15/35 139,343 714 AAA/Aaa Government National Mortgage Association, 6.5%, 5/15/26 725 496,602 NR/NR Government National Mortgage Association, 6.5%, 5/15/29 504,263 171,431 AAA/Aaa Government National Mortgage Association, 6.5%, 5/15/31 173,841 150,085 AAA/Aaa Government National Mortgage Association, 6.5%, 5/15/31 152,207 70,180 NR/NR Government National Mortgage Association, 6.5%, 5/15/32 71,115 36 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Principal Amount S&P/Moody's USD ($) Ratings Value U.S. GOVERNMENT AND AGENCY OBLIGATIONS - (continued) 19,261 NR/NR Government National Mortgage Association, 6.5%, 6/15/31 $ 19,528 4,440,519 AAA/Aaa Government National Mortgage Association, 6.5%, 6/15/31 4,503,305 144,461 AAA/Aaa Government National Mortgage Association, 6.5%, 6/15/32 146,387 841,034 AAA/Aaa Government National Mortgage Association, 6.5%, 6/15/34 851,800 115,970 AAA/Aaa Government National Mortgage Association, 6.5%, 6/15/35 117,442 1,667,206 AAA/Aaa Government National Mortgage Association, 6.5%, 7/15/32 1,689,430 333,627 AAA/Aaa Government National Mortgage Association, 6.5%, 7/15/32 338,075 530,401 AAA/Aaa Government National Mortgage Association, 6.5%, 7/15/35 537,134 2,187,512 AAA/Aaa Government National Mortgage Association, 6.5%, 7/15/35 2,215,284 65,813 AAA/Aaa Government National Mortgage Association, 6.5%, 8/15/11 66,651 262,034 AAA/Aaa Government National Mortgage Association, 6.5%, 8/15/31 265,666 223,199 NR/NR Government National Mortgage Association, 6.5%, 8/15/32 226,175 37,916 AAA/Aaa Government National Mortgage Association, 6.5%, 8/15/32 38,422 207,547 NR/NR Government National Mortgage Association, 6.5%, 9/15/32 210,314 58,929 AAA/Aaa Government National Mortgage Association, 6.5%, 9/15/34 59,684 128,009 AAA/Aaa Government National Mortgage Association, 7.0%, 9/15/11 131,188 39,798 NR/NR Government National Mortgage Association, 7.0%, 12/15/13 41,041 263,942 NR/NR Government National Mortgage Association, 7.0%, 11/15/28 272,422 108,679 NR/NR Government National Mortgage Association, 7.0%, 11/15/28 112,170 10,321 AAA/Aaa Government National Mortgage Association, 7.0%, 4/15/28 10,649 The accompanying notes are an integral part of these financial statements. 37 Pioneer Bond Fund - -------------------------------------------------------------------------------- SCHEDULE OF INVESTMENTS 6/30/06 (continued) - -------------------------------------------------------------------------------- Principal Amount S&P/Moody's USD ($) Ratings Value U.S. GOVERNMENT AND AGENCY OBLIGATIONS - (continued) 10,102 NR/NR Government National Mortgage Association, 7.0%, 8/15/28 $ 10,423 93,528 NR/NR Government National Mortgage Association, 7.0%, 4/15/29 96,517 64,891 NR/NR Government National Mortgage Association, 7.0%, 2/15/30 66,966 15,876 NR/NR Government National Mortgage Association, 7.0%, 12/15/30 16,383 954,439 AAA/Aaa Government National Mortgage Association, 7.0%, 8/15/31 984,728 195,725 NR/NR Government National Mortgage Association, 7.0%, 6/15/31 201,982 80,465 NR/NR Government National Mortgage Association, 7.0%, 6/15/31 83,018 28,986 NR/NR Government National Mortgage Association, 7.0%, 4/15/31 29,905 372,158 AAA/Aaa Government National Mortgage Association, 7.0%, 5/15/32 383,910 66,986 AAA/Aaa Government National Mortgage Association, 7.5%, 8/15/11 69,179 14,498 NR/Aaa Government National Mortgage Association, 7.5%, 2/15/26 15,183 67,755 NR/NR Government National Mortgage Association, 7.5%, 8/15/29 70,863 4,120 NR/NR Government National Mortgage Association, 7.75%, 11/15/29 4,345 10,504 AAA/Aaa Government National Mortgage Association, 7.75%, 2/15/30 11,070 188,626 NR/NR Government National Mortgage Association, 7.5%, 12/15/31 197,143 18,569 NR/NR Government National Mortgage Association, 7.5%, 2/15/31 19,407 39,321 AAA/Aaa Government National Mortgage Association, 8.0%, 5/15/10 40,735 4,095 NR/NR Government National Mortgage Association, 9.5%, 5/15/20 4,483 2,219 NR/NR Government National Mortgage Association, 10.0%, 1/15/06 2,419 2,519 NR/NR Government National Mortgage Association, 10.0%, 1/15/18 2,746 38 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Principal Amount S&P/Moody's USD ($) Ratings Value U.S. GOVERNMENT AND AGENCY OBLIGATIONS - (continued) 520,057 NR/NR Government National Mortgage Association, I, 6.0%, 2/15/29 $ 517,165 55,698 NR/NR Government National Mortgage Association, I, 7.0%, 12/15/30 57,479 36,941 NR/NR Government National Mortgage Association, I, 7.0%, 3/15/31 38,114 19,118 NR/NR Government National Mortgage Association, I, 7.5%, 10/15/29 19,995 871,860 AAA/Aaa Government National Mortgage Association, II, 5.5%, 10/20/19 859,017 11,935 NR/NR Government National Mortgage Association, II, 6.5%, 2/20/29 12,072 5,894 NR/NR Government National Mortgage Association, II, 6.5%, 3/20/29 5,962 170,786 AAA/Aaa Government National Mortgage Association, II, 6.5%, 4/20/29 172,752 381,880 AAA/Aaa Government National Mortgage Association, II, 7.0%, 11/20/28 391,368 13,968 NR/NR Government National Mortgage Association, II, 7.0%, 12/20/30 14,319 135,000 AAA/Aaa U.S. Treasury Bonds, 3.125%, 10/15/08 129,168 4,600,000 AAA/Aaa U.S. Treasury Bonds, 4.0%, 2/15/14 4,273,326 43,200,000 AAA/Aaa U.S. Treasury Bonds, 4.25%, 11/15/13 40,881,370 35,000 AAA/Aaa U.S. Treasury Bonds, 4.25%, 8/15/13 33,206 4,815,000 AAA/Aaa U.S. Treasury Bonds, 5.25%, 11/15/28 4,792,427 43,900,000 AAA/Aaa U.S. Treasury Bonds, 6.25%, 8/15/23 48,416,915 135,000 AAA/Aaa U.S. Treasury Bonds, 7.125%, 2/15/23 161,515 1,000,000 AAA/Aaa U.S. Treasury Bonds, 8.0%, 11/15/21 1,278,906 27,506,864 AAA/Aaa U.S. Treasury Inflation Notes, 1.875%, 7/15/15 26,100,355 4,567,230 AAA/Aaa U.S. Treasury Inflation Notes, 2.0%, 1/15/16 4,361,526 1,456,481 AAA/Aaa U.S. Treasury Inflation Notes, 3.0%, 7/15/12 1,499,835 4,942,563 AAA/Aaa U.S. Treasury Inflation Protected Security, 2.375%, 4/15/11 4,923,065 2,042,064 AAA/Aaa U.S. Treasury Inflation Protected Security, 3.375%, 1/15/12 2,139,062 2,315 AAA/Aaa U.S. Treasury Inflation Protected Security, 3.5%, 1/15/11 2,421 2,000,000 AAA/Aaa U.S. Treasury Note 3.625%, 1/15/10 1,904,218 26,000,000 AAA/Aaa U.S. Treasury Notes, 3.625%, 6/15/10 24,646,180 9,925,000 AAA/Aaa U.S. Treasury Notes, 4.0%, 2/15/15 9,145,729 1,470,000 AAA/Aaa U.S. Treasury Notes, 4.25%, 11/15/14 1,382,489 The accompanying notes are an integral part of these financial statements. 39 Pioneer Bond Fund - -------------------------------------------------------------------------------- SCHEDULE OF INVESTMENTS 6/30/06 (continued) - -------------------------------------------------------------------------------- Principal Amount S&P/Moody's USD ($) Ratings Value U.S. GOVERNMENT AND AGENCY OBLIGATIONS - (continued) 2,700,000 AAA/Aaa U.S. Treasury Notes, 4.875%, 2/15/12 $ 2,670,467 6,560,000 AAA/Aaa U.S. Treasury Notes, 5.5%, 8/15/28 6,739,888 105,000 AAA/Aaa U.S. Treasury Notes, 6.0%, 8/15/09 107,621 135,000 AAA/Aaa U.S. Treasury Notes, 7.0%, 7/15/06 135,053 12,800,000 AAA/Aaa U.S. Treasury Notes, 7.5%, 11/15/16 15,139,994 11,000,000 AAA/Aaa U.S. Treasury Strip, 0.0%, 11/15/13 7,568,781 4,550,000 AAA/Aaa U.S. Treasury Strip, 0.0%, 2/15/11 3,612,609 ------------ TOTAL U.S. GOVERNMENT AGENCY OBLIGATIONS $582,451,768 ------------ (Cost $537,474,937) $582,451,768 ------------ MUNICIPAL BONDS - 0.1% 500,000 AAA/NR Tobacco Settlement Authority Iowa, 6.79%, 6/1/10 $ 510,980 ------------ TOTAL MUNICIPAL BONDS (Cost $500,000) $ 510,980 ------------ TOTAL INVESTMENTS IN SECURITIES - 99.3% (Cost: $833,213,045) (a) $816,051,480 ------------ OTHER ASSETS AND LIABILITIES - 0.7% $ 5,880,491 ------------ TOTAL NET ASSETS - 100.0% $821,931,971 ============ (144A) Security is exempt from registration under Rule 144A of the Securities Act of 1933. Such securities may be resold normally to qualified institutional buyers in a transaction exempt from registration. At June 30, 2006, the value of these securities amounted to $28,114,532 or 3.4% of total net assets. (a) At June 30, 2006 the net unrealized loss on investments based on cost for federal income tax purposes of $834,928,671 was as follows: Aggregate gross unrealized gain for all investments in which there is an excess of value over tax cost. $ 5,617,251 Aggregate gross unrealized loss for all investments in which there is an excess of tax cost over value. (24,494,442) ------------ Net Unrealized loss $(18,877,191) ============ Purchases and sales of securities (excluding temporary cash investments) for the year ended June 30, 2006 were as follows: Purchases Sales Long-term US Government $390,997,088 $275,510,382 Other Long-term Securities 41,950,259 155,638,955 40 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund - ----------------------------------------------------------------------------- STATEMENT OF ASSETS AND LIABILITIES 6/30/06 - ----------------------------------------------------------------------------- ASSETS: Investment in securities (cost $833,213,045) $816,051,480 Cash 155,041 Receivables - Fund shares sold 2,077,097 Interest 7,749,291 Due from Pioneer Investment Management, Inc. 72,135 Other 2,158 ------------ Total assets $826,107,202 ------------ LIABILITIES: Payables - Fund shares repurchased $ 2,036,877 Dividends 1,751,267 Due to affiliates 173,027 Accrued expenses 214,060 ------------ Total liabilities $ 4,175,231 ------------ NET ASSETS: Paid-in capital $843,536,462 Undistributed net investment income 1,208,440 Accumulated net realized loss on investments (5,651,366) Net unrealized loss on investments (17,161,565) ------------ Total net assets $821,931,971 ============ NET ASSET VALUE PER SHARE: (Unlimited number of shares authorized) Class A (based on $208,454,106/23,444,924 shares) $ 8.89 ============ Class B (based on $49,551,789/5,599,573 shares) $ 8.85 ============ Class C (based on $35,942,088/4,078,983 shares) $ 8.81 ============ Investor Class (based on $3,461,993/389,245 shares) $ 8.89 ============ Class R (based on $3,041,786/338,348 shares) $ 8.99 ============ Class Y (based on $521,480,209/59,064,434 shares) $ 8.83 ============ MAXIMUM OFFERING PRICE: Class A ($8.89 [divided by] 95.5%) $ 9.31 ============ The accompanying notes are an integral part of these financial statements. 41 Pioneer Bond Fund - ----------------------------------------------------------------------------- STATEMENT OF OPERATIONS For the Year Ended 6/30/06 - ----------------------------------------------------------------------------- INVESTMENT INCOME: Interest $35,567,917 Income from securities loaned, net 10,651 ----------- Total investment income $ 35,578,568 ------------- EXPENSES: Management fees $ 3,675,428 Transfer agent fees and expenses Class A 567,345 Class B 223,775 Class C 119,410 Investor Class 13,880 Class R 8,707 Class Y 13,568 Distribution fees Class A 518,783 Class B 548,068 Class C 390,721 Class R 11,277 Administrative reimbursements 136,017 Custodian fees 33,542 Registration fees 176,298 Professional fees 102,475 Printing expense 58,859 Fees and expenses of nonaffiliated trustees 19,952 Miscellaneous 38,839 ----------- Total expenses $ 6,656,944 Less management fees waived and expenses reimbursed by Pioneer Investment Management, Inc. (280,911) ------------- Net expenses $ 6,376,033 ------------- Net investment income $ 29,202,535 ------------- REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS: Net realized gain on investments $ 1,169,174 ------------- Change in net unrealized loss on investments $ (38,038,794) ------------- Net loss on investments $ (36,869,620) ------------- Net decrease in net assets resulting from operations $ (7,667,085) ============= 42 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund - ----------------------------------------------------------------------------- STATEMENTS OF CHANGES IN NET ASSETS - ----------------------------------------------------------------------------- For the Years Ended 6/30/06 and 6/30/05, respectively Year Ended Year Ended 6/30/06 6/30/05 FROM OPERATIONS: Net investment income $ 29,202,535 $ 10,838,294 Net realized gain on investments 1,169,174 5,924,830 Change in net unrealized gain (loss) on investments (38,038,794) 2,758,062 -------------- ------------- Net decrease (increase) in net assets resulting from operations $ (7,667,085) $ 19,521,186 -------------- ------------- DISTRIBUTIONS TO SHAREOWNERS: Net investment income: Class A ($0.39 and $0.47 per share, respectively) $ (8,907,383) $ (8,304,200) Class B ($0.31 and $0.38 per share, respectively) (1,880,932) (2,287,184) Class C ($0.32 and $0.39 per share, respectively) (1,376,068) (1,299,699) Investor Class ($0.42 and $0.26 per share, respectively) (181,120) (178,964) Class R ($0.38 and $0.44 per share, respectively) (91,235) (40,890) Class Y ($0.43 and $0.51 per share, respectively) (19,988,313) (778,239) -------------- ------------- Total distributions to shareowners $ (32,425,051) $ (12,889,176) -------------- ------------- FROM FUND SHARE TRANSACTIONS: Net proceeds from sale of shares $ 261,100,711 $ 108,065,548 Shares issued in reorganization 582,614,812 9,260,087 Reinvestment of distributions 15,956,166 10,153,547 Cost of shares repurchased (297,471,664) (93,990,071) -------------- ------------- Net increase in net assets resulting from fund share transactions $ 562,200,025 $ 33,489,111 -------------- ------------- Net increase in net assets $ 522,107,889 $ 40,121,121 NET ASSETS: Beginning of year 299,824,082 259,702,961 -------------- ------------- End of year (including undistributed net investment income of $1,208,440 and $194,187, respectively) $ 821,931,971 $ 299,824,082 ============== ============= The accompanying notes are an integral part of these financial statements. 43 Pioneer Bond Fund - -------------------------------------------------------------------------------- STATEMENTS OF CHANGES IN NET ASSETS (continued) - -------------------------------------------------------------------------------- '06 Shares '06 Amounts '05 Shares '05 Amounts CLASS A Shares sold 7,982,595 $ 72,834,785 4,629,687 $ 43,254,133 Shares issued in reorganization 4,818,649 44,668,880 - - Reinvestment of distributions 821,518 7,480,071 744,375 6,960,699 Less shares repurchased (8,698,451) (79,149,510) (4,329,910) (40,459,474) ---------- ------------- ---------- ------------- Net increase 4,924,311 $ 45,834,226 1,044,152 $ 9,755,358 =========== ============= ========== ============= CLASS B Shares sold 2,005,535 $ 18,264,422 2,072,692 $ 19,272,139 Shares issued in reorganization 615,934 5,678,911 - - Reinvestment of distributions 154,981 1,406,793 182,582 1,699,954 Less shares repurchased (3,250,901) (29,489,973) (2,499,953) (23,264,769) ---------- ------------- ---------- ------------- Net decrease (474,451) $ (4,139,847) (244,679) $ (2,292,676) =========== ============= ========== ============= CLASS C Shares sold 1,905,832 $ 17,283,129 2,724,251 $ 25,177,847 Reinvestment of distributions 115,414 1,044,467 105,060 974,901 Less shares repurchased (2,463,706) (22,284,483) (1,330,493) (12,355,814) ---------- ------------- ---------- ------------- Net increase (decrease) (442,460) $ (3,956,887) 1,498,818 $ 13,796,934 =========== ============= ========== ============= INVESTOR CLASS Shares sold - $ - - $ - Shares issued in reorganization - - 985,115 9,260,087 Reinvestment of distributions 17,950 163,852 13,153 123,059 Less shares repurchased (106,887) (976,139) (520,086) (5,057,239) ---------- ------------- ---------- ------------- Net increase (decrease) (88,937) $ (812,287) 478,182 $ 4,325,907 =========== ============= ========== ============= CLASS R Shares sold 288,594 $ 2,667,309 119,514 $ 1,130,666 Reinvestment of distributions 5,418 49,620 819 7,734 Less shares repurchased (88,228) (812,829) (24,978) (236,438) ---------- ------------- ---------- ------------- Net increase 205,784 $ 1,904,100 95,355 $ 901,962 =========== ============= ========== ============= CLASS Y Shares sold 16,586,060 $ 150,051,066 2,069,705 $ 19,230,763 Shares issued in reorganization 57,855,111 532,267,021 - - Reinvestment of distributions 645,641 5,811,363 41,689 387,200 Less shares repurchased (18,275,250) (164,758,730) (1,351,154) (12,616,337) ----------- ------------- ---------- ------------- Net increase 56,811,562 $ 523,370,720 760,240 $ 7,001,626 =========== ============= ========== ============= 44 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund - -------------------------------------------------------------------------------- FINANCIAL HIGHLIGHTS - -------------------------------------------------------------------------------- Year Ended Year Ended Year Ended Year Ended Year Ended 6/30/06 6/30/05 6/30/04 6/30/03 6/30/02 (a) CLASS A Net asset value, beginning of period $ 9.40 $ 9.18 $ 9.41 $ 8.89 $ 8.78 ------- -------- -------- -------- -------- Increase (decrease) from investment operations: Net investment income $ 0.35 $ 0.40 $ 0.41 $ 0.45 $ 0.52 Net realized and unrealized gain (loss) on investments (0.47) 0.29 (0.14) 0.53 0.13 ------- -------- -------- -------- -------- Net increase (decrease) from investment operations $ (0.12) $ 0.69 $ 0.27 $ 0.98 $ 0.65 Distributions to shareowners: Net investment income (0.39) (0.47) (0.50) (0.46) (0.54) ------- -------- -------- -------- -------- Net increase (decrease) in net asset value $ (0.51) $ 0.22 $ (0.23) $ 0.52 $ 0.11 ------- -------- -------- -------- -------- Net asset value, end of period $ 8.89 $ 9.40 $ 9.18 $ 9.41 $ 8.89 ======= ======== ======== ======== ======== Total return* (1.25)% 7.64% 2.98% 11.38% 7.58% Ratio of net expenses to average net assets+ 1.00% 1.05% 1.14% 1.20% 1.16% Ratio of net investment income to average net assets+ 3.91% 4.27% 4.42% 5.02% 5.79% Portfolio turnover rate 60% 49% 63% 48% 59% Net assets, end of period (in thousands) $208,454 $174,055 $160,421 $183,338 $143,713 Ratios with no assumption of expenses by PIM and no reduction for fees paid indirectly: Net expenses 1.11% 1.18% 1.14% 1.20% 1.16% Net investment income 3.80% 4.14% 4.42% 5.02% 5.79% Ratios with assumption of expenses by PIM and reduction for fees paid indirectly: Net expenses 1.00% 1.05% 1.14% 1.20% 1.16% Net investment income 3.91% 4.27% 4.42% 5.02% 5.79% * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period, and no sales charges. Total return would be reduced if sales charges were taken into account. + Ratio with no reduction for fees paid indirectly. (a) As a result of a change in accounting principle, the effect due to mandatory accretion of discounts and amortization of premiums on debt securities resulted in a reduction of net investment income of $0.02 per share, an increase in net realized and unrealized gain (loss) on investments of $0.02 per share, and the ratio of net investment income to average net assets decreased by 0.18%. The accompanying notes are an integral part of these financial statements. 45 Pioneer Bond Fund - -------------------------------------------------------------------------------- FINANCIAL HIGHLIGHTS - -------------------------------------------------------------------------------- Year Ended Year Ended Year Ended Year Ended Year Ended 6/30/06 6/30/05 6/30/04 6/30/03 6/30/02 (a) CLASS B Net asset value, beginning of period $ 9.36 $ 9.14 $ 9.37 $ 8.87 $ 8.77 ------- ------- ------- ------- ------- Increase (decrease) from investment operations: Net investment income $ 0.27 $ 0.32 $ 0.33 $ 0.37 $ 0.44 Net realized and unrealized gain (loss) on investments (0.47) 0.28 (0.14) 0.53 0.14 ------- ------- ------- ------- ------- Net increase (decrease) from investment operations $ (0.20) $ 0.60 $ 0.19 $ 0.90 $ 0.58 Distributions to shareowners: Net investment income (0.31) (0.38) (0.42) (0.40) (0.48) ------- ------- ------- ------- ------- Net increase (decrease) in net asset value $ (0.51) $ 0.22 $ (0.23) $ 0.50 $ 0.10 ------- ------- ------- ------- ------- Net asset value, end of period $ 8.85 $ 9.36 $ 9.14 $ 9.37 $ 8.87 ======= ======= ======= ======= ======= Total return* (2.14)% 6.72% 2.04% 10.44% 6.78% Ratio of net expenses to average net assets+ 1.90% 1.95% 1.98% 2.02% 1.95% Ratio of net investment income to average net assets+ 3.06% 3.39% 3.55% 4.22% 5.02% Portfolio turnover rate 60% 49% 63% 48% 59% Net assets, end of period (in thousands) $49,552 $56,828 $57,774 $77,367 $59,729 Ratios with no assumption of expenses by PIM and no reduction for fees paid indirectly: Net expenses 1.99% 2.02% 1.98% 2.02% 1.95% Net investment income 2.97% 3.32% 3.55% 4.22% 5.02% Ratios with assumption of expenses by PIM and reduction for fees paid indirectly: Net expenses 1.90% 1.95% 1.98% 2.02% 1.95% Net investment income 3.06% 3.39% 3.55% 4.22% 5.02% * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period, and no sales charges. Total return would be reduced if sales charges were taken into account. + Ratio with no reduction for fees paid indirectly. (a) As a result of a change in accounting principle, the effect due to mandatory accretion of discounts and amortization of premiums on debt securities resulted in a reduction of net investment income of $0.02 per share, an increase in net realized and unrealized gain (loss) on investments of $0.02 per share, and the ratio of net investment income to average net assets decreased by 0.18%. The accompanying notes are an integral part of these financial statements. 46 Pioneer Bond Fund - -------------------------------------------------------------------------------- FINANCIAL HIGHLIGHTS - -------------------------------------------------------------------------------- Year Ended Year Ended Year Ended Year Ended Year Ended 6/30/06 6/30/05 6/30/04 6/30/03 6/30/02 (a) CLASS C Net asset value, beginning of period $ 9.32 $ 9.11 $ 9.31 $ 8.83 $ 8.73 ------- ------- ------- ------- ------- Increase (decrease) from investment operations: Net investment income $ 0.28 $ 0.32 $ 0.33 $ 0.37 $ 0.44 Net realized and unrealized gain (loss) on investments (0.47) 0.28 (0.14) 0.51 0.12 ------- ------- ------- ------- ------- Net increase (decrease) from investment operations $ (0.19) $ 0.60 $ 0.19 $ 0.88 $ 0.56 Distributions to shareowners: Net investment income (0.32) (0.39) (0.39) (0.40) (0.46) ------- ------- ------- ------- ------- Net increase (decrease) in net asset value $ (0.51) $ 0.21 $ (0.20) $ 0.48 $ 0.10 ------- ------- ------- ------- ------- Net asset value, end of period $ 8.81 $ 9.32 $ 9.11 $ 9.31 $ 8.83 ======= ======= ======= ======= ======= Total return* (2.08)% 6.68% 2.11% 10.28% 6.55% Ratio of net expenses to average net assets+ 1.89% 1.92% 1.97% 2.16% 2.14% Ratio of net investment income to average net assets+ 3.07% 3.24% 3.59% 4.05% 4.78% Portfolio turnover rate 60% 49% 63% 48% 59% Net assets, end of period (in thousands) $35,942 $42,160 $27,545 $29,777 $18,067 Ratios with no assumption of expenses by PIM and no reduction for fees paid indirectly: Net expenses 1.89% 1.92% 1.97% 2.16% 2.15% Net investment income 3.07% 3.24% 3.59% 4.05% 4.77% Ratios with assumption of expenses by PIM and reduction for fees paid indirectly: Net expenses 1.89% 1.91% 1.97% 2.16% 2.15% Net investment income 3.07% 3.25% 3.59% 4.05% 4.77% * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period, and no sales charges. Total return would be reduced if sales charges were taken into account. + Ratio with no reduction for fees paid indirectly. (a) As a result of a change in accounting principle, the effect due to mandatory accretion of discounts and amortization of premiums on debt securities resulted in a reduction of net investment income of $0.02 per share, an increase in net realized and unrealized gain (loss) on investments of $0.02 per share, and the ratio of net investment income to average net assets decreased by 0.18%. The accompanying notes are an integral part of these financial statements. 47 Pioneer Bond Fund - -------------------------------------------------------------------------- FINANCIAL HIGHLIGHTS - -------------------------------------------------------------------------- Year Ended 12/10/04 (b) 6/30/06 to 6/30/05 INVESTOR CLASS Net asset value, beginning of period $ 9.40 $ 9.40 ------- ------- Increase (decrease) from investment operations: Net investment income $ 0.38 $ 0.22 Net realized and unrealized gain (loss) on investments (0.47) 0.04 ------- ------- Net increase (decrease) from investment operations $ (0.09) $ 0.26 Distributions to shareowners: Net investment income (0.42) (0.26) ------- ------- Net decrease in net asset value $ (0.51) $ 0.00 ------- ------- Net asset value, end of period $ 8.89 $ 9.40 ======= ======= Total return* (0.98)% 2.84%(a) Ratio of net expenses to average net assets+ 0.74% 0.74%** Ratio of net investment income to average net assets+ 4.24% 4.43%** Portfolio turnover rate 60% 49%(a) Net assets, end of period (in thousands) $ 3,462 $ 4,496 Ratios with no assumption of expenses by PIM and no reduction for fees paid indirectly: Net expenses 0.94% 0.89%** Net investment income 4.04% 4.28%** Ratios with assumption of expenses by PIM and reduction for fees paid indirectly: Net expenses 0.74% 0.74%** Net investment income 4.24% 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. (a) Not annualized. (b) Investor class commenced operations on December 11, 2004. 48 The accompanying notes are an integral part of these financial statements. Pioneer Bond Fund - -------------------------------------------------------------------------- FINANCIAL HIGHLIGHTS - -------------------------------------------------------------------------- Year Ended Year Ended Year Ended 4/1/03 (a) 6/30/06 6/30/05 6/30/04 to 6/30/03 CLASS R Net asset value, beginning of period $ 9.50 $ 9.28 $ 9.50 $ 9.19 ------- ------- ------- -------- Increase (decrease) from investment operations: Net investment income $ 0.34 $ 0.36 $ 0.47 $ 0.10 Net realized and unrealized gain (loss) on investments (0.47) 0.30 (0.17) 0.32 ------- ------- ------- -------- Net increase (decrease) from investment operations $ (0.13) $ 0.66 $ 0.30 $ 0.42 Distributions to shareowners: Net investment income (0.38) (0.44) (0.52) (0.11) ------- ------- ------- -------- Net increase (decrease) in net asset value $ (0.51) $ 0.22 $ (0.22) $ 0.31 ------- ------- ------- -------- Net asset value, end of period $ 8.99 $ 9.50 $ 9.28 $ 9.50 ======= ======= ======= ======== Total return* (1.43)% 7.27% 3.20% 4.55%(b) Ratio of net expenses to average net assets+ 1.25% 1.31% 1.32% 1.42%** Ratio of net investment income to average net assets+ 3.50% 3.77% 4.71% 4.13%** Portfolio turnover rate 60% 49% 63% 48%(b) Net assets, end of period (in thousands) $ 3,042 $ 1,259 $ 345 $ 1 Ratios with no assumption of expenses by PIM and no reduction for fees paid indirectly: Net expenses 1.46% 1.43% 1.32% 1.42%** Net investment income 3.29% 3.65% 4.71% 4.13%** Ratios with assumption of expenses by PIM and reduction for fees paid indirectly: Net expenses 1.25% 1.31% 1.32% 1.42%** Net investment income 3.50% 3.77% 4.71% 4.13%** (a) Class R shares were first publicly offered on April 1, 2003. * 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. (b) Not annualized. 49 Pioneer Bond Fund - -------------------------------------------------------------------------- FINANCIAL HIGHLIGHTS - -------------------------------------------------------------------------- 9/20/01 (a) Year Ended Year Ended Year Ended Year Ended to 6/30/06 6/30/05 6/30/04 6/30/03 6/30/02 (b) CLASS Y Net asset value, beginning of period $ 9.33 $ 9.12 $ 9.35 $ 8.87 $ 8.85 ------- ------- ------- ------- -------- Increase (decrease) from investment operations: Net investment income $ 0.39 $ 0.44 $ 0.46 $ 0.51 $ 0.43 Net realized and unrealized gain (loss) on investments (0.46) 0.28 (0.14) 0.51 0.04 ------- ------- ------- ------- -------- Net increase (decrease) from investment operations $ (0.07) $ 0.72 $ 0.32 $ 1.02 $ 0.47 Distributions to shareowners: Net investment income (0.43) (0.51) (0.55) (0.54) (0.45) ------- ------- ------- ------- -------- Net increase (decrease) in net asset value $ (0.50) $ 0.21 $ (0.23) $ 0.48 $ 0.02 ------- ------- ------- ------- -------- Net asset value, end of period $ 8.83 $ 9.33 $ 9.12 $ 9.35 $ 8.87 ======= ======= ======= ======= ======== Total return* (0.77)% 8.07% 3.48% 11.86% 5.48%(c) Ratio of net expenses to average net assets+ 0.58% 0.61% 0.58% 0.67% 0.64%** Ratio of net investment income to average net assets+ 4.20% 4.43% 5.05% 5.54% 6.28%** Portfolio turnover rate 60% 49% 63% 48% 59%(c) Net assets, end of period (in thousands) $521,480 $21,027 $13,617 $ 7,719 $ 4,051 Ratios with no assumption of expenses by PIM and no reduction for fees paid indirectly: Net expenses 0.58% 0.61% 0.58% 0.67% 0.64%** Net investment income 4.20% 4.43% 5.05% 5.54% 6.28%** Ratios with assumption of expenses by PIM and reduction for fees paid indirectly: Net expenses 0.58% 0.61% 0.58% 0.67% 0.64%** Net investment income 4.20% 4.43% 5.05% 5.54% 6.28%** (a) Class Y shares were first publicly offered on September 20, 2001. * 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. (b) As a result of a change in accounting principle, the effect due to mandatory accretion of discounts and amortization of premiums on debt securities resulted in a reduction of net investment income of $0.02 per share, an increase in net realized and unrealized gain (loss) on investments of $0.02 per share, and the ratio of net investment income to average net assets decreased by 0.23%. (c) Not annualized. 50 Pioneer Bond Fund - -------------------------------------------------------------------------------- NOTES TO FINANCIAL STATEMENTS 6/30/06 - -------------------------------------------------------------------------------- 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 Trustees have authorized the issuance of six classes of shares of the Fund. The Fund offers six classes of shares designated as Class A, Class B, Class C, Investor Class, Class R, and Class Y shares. Class R shares were first publicly offered April 1, 2003. Investor Class shares were first issued on December 10, 2004. The Fund is not offering additional Investor Class shares except in connection with the reinvestment of dividends on the Fund's Outstanding Investor Class shares. All Investor Class shares of the Fund, whenever issued, convert to Class A shares of the Fund on December 10, 2006. Each class of shares represents an interest in the same portfolio of investments of the Fund and has equal rights to voting, redemptions, dividends and liquidation, except that each class of shares can bear different transfer agent and distributions fees and has exclusive voting rights with respect to the distribution plans that have been adopted by Class A, Class B, Class C, and Class R shareowners, respectively. There is no distribution plan for Class Y shares and Investor Class shares. The Fund's financial statements have been prepared in conformity with U.S. generally accepted accounting principles that require the management of the Fund to, among other things, make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of income, expenses and gains and losses on investments during the reporting period. Actual results could differ from those estimates. 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. Securities are valued at prices supplied by independent pricing services, which consider such factors as Treasury spreads, yields, maturities 51 Pioneer Bond Fund - -------------------------------------------------------------------------------- NOTES TO FINANCIAL STATEMENTS 6/30/06 (continued) - -------------------------------------------------------------------------------- and ratings. Valuations may be supplemented by dealers and other sources, as required. Securities for which there are no other readily available valuation methods are valued at their fair values as determined by, or under the direction of the Board of Trustees. At June 30, 2006 there were no securities fair valued. Principal amounts of mortgage-backed securities are adjusted for monthly paydowns. Temporary cash investments are valued at amortized cost. All discounts/premiums on debt securities are accreted/amortized for financial reporting purposes over the life of the respective securities, and are included in interest income. Market discount and premium are accreted or amortized daily. Premiums and discounts related to certain mortgage-backed securities are amortized or accreted in proportion to the underlying monthly paydowns. Interest income is recorded on the accrual basis. 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. 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 either from or in excess of net investment income or net realized gain on investment transactions, or from paid-in capital, depending on the type of book/tax differences that may exist. At June 30, 2006 the Fund had a net capital loss carryforward of $2,562,465 of which $1,096,027 will expire in 2009, $77,493 will expire in 2010, $1,084,416 will expire in 2011 and $304,529 will expire in 2013, if not utilized. Utilization of these capital losses could be subject to limitations imposed by the Internal Revenue Code. 52 Pioneer Bond Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- The Fund has elected to defer approximately $1,373,275 of capital losses recognized between November 1, 2005 and June 30, 2006 to its fiscal year ending June 30, 2007. The tax character of current year distributions paid will be determined at the end of the current fiscal year. The tax character of distributions paid during the years ended June 30, 2006 and 2005 were as follows: - -------------------------------------------------------------------------------- 2006 2005 - -------------------------------------------------------------------------------- Distributions paid from: Ordinary income $32,425,051 $12,889,176 ----------- ----------- Total $32,425,051 $12,889,176 =========== =========== - -------------------------------------------------------------------------------- The following shows the components of distributable earnings on a federal income tax basis at June 30, 2006. - -------------------------------------------------------------------------------- 2006 - -------------------------------------------------------------------------------- Undistributed ordinary income $ 2,959,707 Undistributed long-term loss (2,562,465) Post October loss deferred (1,373,275) Dividends payable (1,751,267) Unrealized appreciation $(18,877,191) ------------ Total $(21,604,491) ============ - -------------------------------------------------------------------------------- The difference between book basis and tax-basis unrealized appreciation is attributable to the tax deferral of losses on wash sales and the tax treatment of amortization. At June 30, 2006, the Fund reclassified $4,236,769 to increase undistributed net investment income and $4,194,196 to increase accumulated net realized loss and $42,573 to decrease paid in capital. This reclassification has no impact on the net assets of the Fund and presents the Fund's capital accounts on a tax basis. 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 UniCredito 53 Pioneer Bond Fund - -------------------------------------------------------------------------------- NOTES TO FINANCIAL STATEMENTS 6/30/06 (continued) - -------------------------------------------------------------------------------- Italiano S.p.A., (UniCredito Italiano), earned $58,305 in underwriting commissions on the sale of Class A shares during the year ended June 30, 2006. D. Class Allocations 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 Investor Class shares are not subject to a distribution plan. Shareowners of each class share all expenses and fees paid to the transfer agent, Pioneer Investment Management Shareholder Services, Inc. (PIMSS), for its services, which are allocated based on the number of accounts in each class and the ratable allocation of related out-of-pocket expenses (see Note 3). 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 the respective percentage of adjusted net assets at the beginning of the day. 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, at the same time, and in the same amount, except that each class of shares can bear different transfer agent and distribution fees. E. Repurchase Agreements With respect to repurchase agreements entered into by the Fund, the value of the underlying securities (collateral), including accrued interest received from the counterparties, is required to be at least equal to or in excess of the value of the repurchase agreement at the time of purchase. The collateral for all repurchase agreements is held in safekeeping in the customer-only account of the Fund's custodian, or subcustodians. 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. 54 Pioneer Bond Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- F. Securities Lending The Fund lends securities in its portfolio to certain broker-dealers or other institutional investors, with the Fund's custodian acting as the lending agent. When entering into a loan, the Fund receives collateral, which is maintained by the custodian and earns income in the form of negotiated lenders' fees. The Fund also continues to receive interest or payments in lieu of dividends 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 loans are secured by collateral of at least 102% at all times, of the fair value of the securities loaned. The amount of the collateral will be adjusted daily to reflect any price fluctuation in the value of loaned securities. The Fund has the right under the lending agreements to recover the securities on loan from the borrower on demand. The Fund invests cash collateral in the Securities Lending Investment Fund, which is managed by Brown Brothers Harriman & Co., the Fund's custodian. 2. Management Agreement PIM, a wholly owned indirect subsidiary of UniCredito Italiano, 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. Effective November 1, 2005, PIM has agreed to limit ordinary operating expenses to the extent required to reduce Fund expenses to 1.00%, 1.90%, 1.90% and 1.25% of the average daily net assets attributable to Class A, Class B, Class C and Class R shares, respectively. Class Y shares do not have an expense limitation. These expense limitations are in effect through November 1, 2008 for Class A shares and through November 1, 2006 for Class B, Class C and Class R shares. PIM expects to continue its limitation of expenses unless the expense limit agreement with the Fund is terminated pursuant to the terms of the expense limit agreement. However, there can be no assurance that PIM will extend the expense limitation beyond November 1, 2008 for Class A shares and November 1, 2006 for Class B, Class C and Class R shares. The Fund may terminate the expense limitation agreement at any time; provided, however, that the Board of Trustees would not take such action unless it determined termination of the agreement be in the best interests of the Fund and its shareowners. 55 Pioneer Bond Fund - -------------------------------------------------------------------------------- NOTES TO FINANCIAL STATEMENTS 6/30/06 (continued) - -------------------------------------------------------------------------------- Through December 10, 2006, PIM has contractually agreed not to impose all or a portion of its management fee and to assume other operating expenses (excluding taxes, commissions, interest and extraordinary expenses) of the Fund to the extent necessary to limit Investor Class expenses to 0.74% of the average daily net assets attributable to Investor Class shares. 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. At June 30, 2006, $10,820 was payable to PIM related to management fees, administrative costs and certain other services, and is included in due to affiliates. 3. Transfer Agent PIMSS, a wholly owned indirect subsidiary of UniCredito Italiano, provides substantially all transfer agent and shareowner services to the Fund at negotiated rates. Included in due to affiliates is $158,412 in transfer agent fees payable to PIMSS at June 30, 2006. 4. Distribution and Service Plans The Fund adopted a Plan of Distribution with respect to each class of shares (Class A Plan, Class B Plan, Class C Plan and Class R Plan) in accordance with Rule 12b-1 of the Investment Company Act of 1940. Pursuant to the Class A Plan, the Fund pays PFD a service fee of up to 0.25% of the average daily net assets attributable to Class A shares in reimbursement of its actual expenditures to finance activities primarily intended to result in the sale of Class A shares. Pursuant to the Class B Plan and the Class C Plan, the Fund pays PFD 1.00% of the average daily net assets attributable to each class of shares. The fee consists of a 0.25% service fee and a 0.75% distribution fee both 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 Class R Plan, the Fund pays PFD 0.50% of the average daily net assets attributable to Class R shares for distribution services paid as compensation for personal services and/or account maintenance services or distribution services. 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 56 Pioneer Bond Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- service fee of up to 0.25% of the Fund's average daily net assets attributable to Class R shares held by such plans. Included in due to affiliates is $3,795 in distribution fees payable to PFD at June 30, 2006. In addition, redemptions of Class A, Class B and Class C 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. Class B shares subscribed on or after December 1, 2004 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. Shares purchased prior to December 1, 2004 remain subject to the CDSC in effect at the time those shares were purchased. Redemptions of Class C shares within one year of purchase are subject to a CDSC of 1.00%. Proceeds from the CDSCs are paid to PFD. For the year ended June 30, 2006, $156,730 in CDSCs 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 year ended June 30, 2006, the Fund's expenses were not reduced under such arrangements. 6. Merger Information On December 8, 2004, beneficial owners of Safeco Intermediate Term Bond Fund (one of the series that comprised Safeco Taxable Bond Trust) approved a proposed Agreement and Plan of Reorganization that provided for the merger listed below. This tax-free reorganization was accomplished on December 10, 2004, by exchanging all of Safeco's net assets for Investor Class shares, based on the Fund's Class A shares' ending net asset value. The following charts show the details of the reorganizations as of that closing date ("Closing Date"): 57 Pioneer Bond Fund - -------------------------------------------------------------------------------- NOTES TO FINANCIAL STATEMENTS 6/30/06 (continued) - -------------------------------------------------------------------------------- - --------------------------------------------------------------------------------------------------- Safeco Pioneer Intermediate Pioneer Bond Fund Term Bond Fund Bond Fund (Pre-Reorganization) (Pre-Reorganization) (Post-Reorganization) - --------------------------------------------------------------------------------------------------- Net Assets $257,177,281 $9,260,087 $266,437,368 Shares Outstanding 27,433,514 1,085,975 28,418,629 Investor Class Shares Issued 985,115 Unrealized Appreciation Accumulated on Closing Date Gain - --------------------------------------------------------------------------------------------------- Sefeco Intermediate Term Bond Fund $ 176,429 $ 26,968 - --------------------------------------------------------------------------------------------------- In addition, on September 22, 2005, beneficial owners of Amsouth High Quality Bond approved a proposed Agreement and Plan of Reorganization that provided for the merger listed below. This tax-free reorganization was accomplished on September 23, 2005, by exchanging all of Amsouth High Quality Bond's net assets in Class A, Class B and Class I for Pioneer Fund's Shares, based on Pioneer Fund's Class A, Class B and Class Y shares' ending net asset value, respectively. The following charts show the details of the reorganizations as of that closing date ("Closing Date"): 58 Pioneer Bond Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- - --------------------------------------------------------------------------------------------------- Pioneer Amsouth Pioneer Bond Fund High Quality Bond Bond Fund (Pre-Reorganization) (Pre-Reorganization) (Post-Reorganization) - --------------------------------------------------------------------------------------------------- Net Assets Class A $178,317,842 $ 44,668,880 $222,986,722 Class B $ 58,181,919 $ 5,678,911 $ 63,860,830 Class C $ 42,851,287 $ - $ 42,851,287 Investor Class $ 4,095,750 $ - $ 4,095,750 Class R $ 1,678,306 $ - $ 1,678,306 Class I $ - $532,267,021 $ Class Y $ 27,130,385 $ - $559,397,406 Total Net Assets $312,255,489 $582,614,812 $894,870,301 Shares Outstanding Class A 19,242,520 4,085,199 24,061,169 Class B 6,307,434 520,998 6,923,368 Class C 4,661,389 4,661,389 Investor Class 441,773 441,773 Class R 179,118 179,118 Class I 48,671,755 Class Y 2,947,361 60,802,472 Total Shares Outstanding 33,779,595 53,277,952 97,069,289 Shares Issued in Reorganization Class A 4,818,649 Class B 615,934 Class Y 57,855,111 Unrealized Accumulated Appreciation Gain on on Closing Date Closing Date - --------------------------------------------------------------------------------------------------- Amsouth High Quality Bond $ 15,276,095 $ 2,768,070 - --------------------------------------------------------------------------------------------------- 59 Pioneer Bond Fund - -------------------------------------------------------------------------------- REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM - -------------------------------------------------------------------------------- To the Board of Trustees and Shareowners of Pioneer Bond Fund: We have audited the accompanying statement of assets and liabilities of Pioneer Bond Fund (the "Fund"), including the schedule of investments, as of June 30, 2006, and the related statement of operations for the year then ended, the statements of changes in net assets for each of the two years in the period then ended, and the financial highlights for each of the five years in the period then ended. These financial statements and financial highlights are the responsibility of the Fund's management. Our responsibility is to express an opinion on these financial statements and financial highlights based on our audits. We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements and financial highlights are free of material misstatement. We were not engaged to perform an audit of the Fund's internal control over financial reporting. Our audits included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Fund's internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements and financial highlights, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. Our procedures included confirmation of securities owned as of June 30, 2006, by correspondence with the custodian. We believe that our audits provide a reasonable basis for our opinion. In our opinion, the financial statements and financial highlights referred to above present fairly, in all material respects, the financial position of Pioneer Bond Fund at June 30, 2006, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period then ended, and the financial highlights for each of the five years in the period then ended, in conformity with U.S. generally accepted accounting principles. /s/ Ernst & Young LLP Boston, Massachusetts August 11, 2006 60 Pioneer Bond Fund - -------------------------------------------------------------------------------- TRUSTEES, OFFICERS AND SERVICE PROVIDERS - -------------------------------------------------------------------------------- Investment Adviser Pioneer Investment Management, Inc. Custodian Brown Brothers Harriman & Co. Independent Registered Public Accounting Firm Ernst & Young LLP Principal Underwriter Pioneer Funds Distributor, Inc. Legal Counsel Wilmer Cutler Pickering Hale and Dorr LLP Shareowner Services and Transfer Agent Pioneer Investment Management Shareholder Services, Inc. Trustees and Officers The Fund's Board of Trustees provides broad supervision over the Fund's affairs. The officers of the Fund are responsible for the Fund's operations. The Fund's Trustees and officers are listed below, together with their principal occupations during the past five years. Trustees who are interested persons of the Fund within the meaning of the Investment Company Act of 1940 are referred to as Interested Trustees. Trustees who are not interested persons of the Fund are referred to as Independent Trustees. Each of the Trustees serves as a trustee of each of the 89 U.S. registered investment portfolios for which Pioneer Investment Management, Inc. ("Pioneer") serves as investment adviser (the "Pioneer Funds"). The address for all Interested Trustees and all officers of the Fund is 60 State Street, Boston, Massachusetts 02109. The Fund's statement of additional information provides more detailed information regarding the Fund's Trustees and is available upon request, without charge, by calling 1-800-225-6292. 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 www.pioneerinvestments.com and on the SEC's web site at http://www.sec.gov. 61 Pioneer Bond Fund - -------------------------------------------------------------------------------- INTERESTED TRUSTEES - -------------------------------------------------------------------------------- Positions Held Length of Service Principal Occupation During Other Directorships Held Name and Age With the Fund and Term of Office Past Five Years by this Trustee John F. Cogan, Jr. (80)* Chairman of Trustee since 1996. Deputy Chairman and a Director of Director of ICI Mutual the Board, Serves until Pioneer Global Asset Management Insurance Company; Trustee and successor trustee is S.p.A. ("PGAM"); Non-Executive Director of Harbor President elected or earlier Chairman and a Director of Pioneer Global Company, Ltd. retirement or Investment Management USA Inc. removal. ("PIM-USA"); Chairman and a Director of Pioneer; Chairman and Director of Pioneer Institutional Asset Management, Inc. (since 2006); Director of Pioneer Alternative Investment Management Limited (Dublin); President and a Director of Pioneer Alternative Investment Management (Bermuda) Limited and affiliated funds; Director of PIOGLOBAL Real Estate Investment Fund (Russia) (until June 2006); Director of Nano-C, Inc. (since 2003); Director of Cole Investment Corporation (since 2004); Director of Fiduciary Counseling, Inc.; President and Director of Pioneer Funds Distributor, Inc. ("PFD") (until May 2006); President of all of the Pioneer Funds; and Of Counsel, Wilmer Cutler Pickering Hale and Dorr LLP (counsel to PIM-USA and the Pioneer Funds) *Mr. Cogan is an Interested Trustee because he is an officer or director of Pioneer and certain of its affiliates. - ----------------------------------------------------------------------------------------------------------------------------------- 62 Pioneer Bond Fund - -------------------------------------------------------------------------------- INDEPENDENT TRUSTEES - -------------------------------------------------------------------------------- Positions Held Length of Service Principal Occupation During Other Directorships Held Name, Age and Address With the Fund and Term of Office Past Five Years by this Trustee David R. Bock **(62) Trustee Trustee since 2005. Senior Vice President and Chief Director of The Enterprise 3050 K. Street NW, Serves until successor Financial Officer, I-trax, Inc. Social Investment Washington, DC 20007 trustee is elected or (publicly traded health care Company (privately-held earlier retirement or services company) (2001 - present); affordable housing removal. Managing Partner, Federal City finance company); Capital Advisors (boutique merchant Director of New York bank) (2002 to 2004); Executive Mortgage Trust (publicly Vice President and Chief Financial traded mortgage REIT). Officer, Pedestal Inc. (internet-based mortgage trading company) (2000 - 2002). **Mr. Bock became a Trustee of the Fund on January 1, 2005. - ----------------------------------------------------------------------------------------------------------------------------------- Mary K. Bush (58) Trustee Trustee since 1997. President, Bush International Director of Brady 3509 Woodbine Street, Serves until (international financial advisory Corporation (industrial Chevy Chase, MD 20815 successor trustee firm). identification and is elected or earlier specialty coated retirement or removal. material products manufacturer), Director of Mortgage Guaranty Insurance Corporation, and Briggs & Stratton, Inc. (engine manufacturer) - ----------------------------------------------------------------------------------------------------------------------------------- Margaret B.W. Graham Trustee Trustee since 1996. Founding Director, The Winthrop None (59) Serves until Group, Inc. (consulting firm); 1001 Sherbrooke successor trustee Desautels, Faculty of Management, Street West, is elected or earlier McGill University. Montreal, Quebec, retirement or removal. Canada H3A 1G5 - ----------------------------------------------------------------------------------------------------------------------------------- 63 Pioneer Bond Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Positions Held Length of Service Principal Occupation During Other Directorships Held Name, Age and Address With the Fund and Term of Office Past Five Years by this Trustee Marguerite A. Piret (58) Trustee Trustee since 1996. President and Chief Executive Director of New America One Boston Place, 28th Floor, Serves until Officer, Newbury, Piret & High Income Fund, Inc. Boston, MA 02108 successor trustee Company, Inc. (investment (closed-end investment is elected or earlier banking firm). company). retirement or removal. - ----------------------------------------------------------------------------------------------------------------------------------- Thomas J. Perna (55) Trustee Trustee since February Private investor (2004 - Director of Quadriserv 89 Robbins Avenue, 2006. Serves until present); Senior Executive Inc. (technology Berkeley Heights, NJ 07922 successor trustee is Vice President, The Bank of products for securities elected or earlier New York (financial and lending industry) retirement or removal. securities services) (1986 - 2004). - ----------------------------------------------------------------------------------------------------------------------------------- John Winthrop (70) Trustee Trustee since 1996. President, John Winthrop & None One North Adgers Wharf, Serves until Co., Inc. (private investment Charleston, SC 29401 successor trustee firm). is elected or earlier retirement or removal. - ----------------------------------------------------------------------------------------------------------------------------------- 64 Pioneer Bond Fund - -------------------------------------------------------------------------------- FUND OFFICERS - -------------------------------------------------------------------------------- Positions Held Length of Service Principal Occupation During Other Directorships Held Name and Age With the Fund and Term of Office Past Five Years by this Officer Osbert M. Hood (53) Executive Vice Since June 2003. President and Chief Executive Trustee of certain President Serves at the Officer, PIM-USA since May 2003 Pioneer Funds discretion of (Director since January 2001; the Board. Executive Vice President and Chief Operating Officer from November 2000 - May 2003); Director of PGAM since June 2003; President and Director of Pioneer since May 2003; President and Director of Pioneer Institutional Asset Management, Inc. since February 2006; Chairman and Director of Pioneer Investment Management Shareholder Services, Inc. ("PIMSS") since May 2003; Director of PFD since May 2006; Director of Oak Ridge Investments, L.L.C. (a registered investment adviser in which PIM USA owns a minority interest) since January 2005; Director of Vanderbilt Capital Advisors, LLC (an institutional investment adviser wholly-owned by PIM USA) since June 2006; Executive Vice President of all of the Pioneer Funds since June 2003 - ----------------------------------------------------------------------------------------------------------------------------------- Dorothy E. Bourassa (58) Secretary Since September, Secretary of PIM-USA; Senior Vice None 2003. Serves President - Legal of Pioneer; and at the discretion of Secretary/Clerk of most of the Board. PIM-USA's subsidiaries; Secretary of all of the Pioneer Funds since September 2003 (Assistant Secretary from November 2000 to September 2003). Assistant Vice President and Senior Counsel of - ----------------------------------------------------------------------------------------------------------------------------------- Christopher J. Kelley (41) Assistant Since September, Pioneer since July 2002; Vice None Secretary 2003. Serves at President and Senior Counsel of the discretion of BISYS Fund Services, Inc. (April the Board. 2001 to June 2002); Senior Vice President and Deputy General Counsel of Funds Distributor, Inc. (July 2000 to April 2001; Assistant Secretary of all Pioneer Funds since September 2003. - ----------------------------------------------------------------------------------------------------------------------------------- 65 Pioneer Bond Fund - -------------------------------------------------------------------------------- FUND OFFICERS - -------------------------------------------------------------------------------- Positions Held Length of Service Principal Occupation During Other Directorships Held Name and Age With the Fund and Term of Office Past Five Years by this Officer Christopher P. Harvey (45) Assistant Since July 2006 Partner, Wilmer Cutler Pickering None Secretary Serves at the Hale and Dorr LLP; and Assistant discretion of the Secretary of all Pioneer Funds Board. since July 2006 - ------------------------------------------------------------------------------------------------------------------------------ Vincent Nave (61) Treasurer Since November, Vice President - Fund Accounting, None 2000. Serves at Administration and Custody Services the discretion of of Pioneer; and Treasurer of all of the Board. the Pioneer Funds. - ------------------------------------------------------------------------------------------------------------------------------ Mark E. Bradley (46) Assistant Since November, Deputy Treasurer of Pioneer since None Treasurer 2004. Serves 2004; Treasurer and Senior Vice at the discretion President, CDC IXIS Asset of the Board. Management Services from 2002 to 2003; Assistant Treasurer and Vice President, MFS Investment Management from 1997 to 2002; and Assistant Treasurer of all of the Pioneer Funds since November 2004. - ------------------------------------------------------------------------------------------------------------------------------ Luis I. Presutti (41) Assistant Since November, Assistant Vice President - Fund None Treasurer 2000. Serves Accounting, Administration and at the discretion Custody Services of Pioneer; and of the Board. Assistant Treasurer of all of the Pioneer Funds. - ------------------------------------------------------------------------------------------------------------------------------ Gary Sullivan (48) Assistant Since May, 2002. Fund Accounting Manager - Fund None Treasurer Serves at the Accounting, Administration and discretion of Custody Services of Pioneer; and the Board. Assistant Treasurer of all of the Pioneer Funds since May 2002. - ------------------------------------------------------------------------------------------------------------------------------ 66 Pioneer Bond Fund - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Positions Held Length of Service Principal Occupation During Other Directorships Name and Age With the Fund and Term of Office Past Five Years Held by this Officer Katherine Kim Sullivan (32) Assistant Treasurer Since September, Fund Administration Manager - Fund None Terrence J. Cullen (45) Chief Compliance 2003. Serves Accounting, Administration and Officer at the discretion of Custody Services since June 2003; the Board. Assistant Vice President - Mutual Fund Operations of State Street Corporation from June 2002 to June 2003 (formerly Deutsche Bank Asset Management); Pioneer Fund Accounting, Administration and Custody Services (Fund Accounting Manager from August 1999 to May 2002); Assistant Treasurer of all Pioneer Funds since September 2003. - ----------------------------------------------------------------------------------------------------------------------------------- Terrence J. Cullen (45) Chief Compliance Since March 2006. Chief Compliance Officer of Pioneer None Officer Serves at the and Pioneer Funds since March 2006; discretion of Vice President and Senior Counsel the Board. of Pioneer since September 2004; and Senior Vice President and Counsel, State Street Research & Management Company (February 1998 to September 2004). - ----------------------------------------------------------------------------------------------------------------------------------- The outstanding capital stock of PFD, PIM and PIMSS is indirectly wholly owned by UniCredito Italiano S.p.A. ("UniCredito Italiano"), one of the largest banking groups in Italy. PIM, the Fund's investment adviser, provides investment management and financial services to mutual funds, institutional and other clients. 67 - -------------------------------------------------------------------------------- This page for your notes. 68 - -------------------------------------------------------------------------------- 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 Telecommunications Device for the Deaf (TDD) 1-800-225-1997 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: www.pioneerinvestments.com Before investing consider the Fund's investment objectives, risks, charges and expenses. Contact your advisor or Pioneer Investments for a prospectus containing this information. Read it carefully. The Fund files a complete statement 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. N/A ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES. (a) Disclose, under the caption AUDIT FEES, the aggregate fees billed for each of the last two fiscal years for professional services rendered by the principal accountant for the audit of the registrant's annual financial statements or services that are normally provided by the accountant in connection with statutory and regulatory filings or engagements for those fiscal years. Audit Fees Fees for audit services provided to the Fund, including fees associated with the filings of its Form N-1A, totaled approximately $39,535 in 2006 and approximately $49,795 in 2005. (b) Disclose, under the caption AUDIT-RELATED FEES, the aggregate fees billed in each of the last two fiscal years for assurance and related services by the principal accountant that are reasonably related to the performance of the audit of the registrant's financial statements and are not reported under paragraph (a) of this Item. Registrants shall describe the nature of the services comprising the fees disclosed under this category. Audit-Related Fees There were no audit-related services in 2006 or 2005. (c) Disclose, under the caption TAX FEES, the aggregate fees billed in each of the last two fiscal years for professional services rendered by the principal accountant for tax compliance, tax advice, and tax planning. Registrants shall describe the nature of the services comprising the fees disclosed under this category. Tax Fees Fees for tax compliance services, primarily for tax returns, totaled $7,140 in 2006 and $6,800 in 2005. (d) Disclose, under the caption ALL OTHER FEES, the aggregate fees billed in each of the last two fiscal years for products and services provided by the principal accountant, other than the services reported in paragraphs (a) through (c) of this Item. Registrants shall describe the nature of the services comprising the fees disclosed under this category. Other Fees There were no other services provided to the Fund during the fiscal years ended June 30, 2006 and 2005. (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. The aggregate non-audit fees for the Fund and affiliates, as previously defined, totaled approximately $7,140 in 2006 and $6,800 in 2005. (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 independent auditor, Ernst & Young LLP ("E&Y"), has advised the Audit Committee of the Fund's Board of Trustees that E&Ys Spanish affiliate (E&Y Spain) performed certain non-audit work for Pioneer Global Investments Limited ("PGIL"), an affiliate of the Funds investment adviser. The services involved the receipt and disbursement of monies transferred to E&Y Spain by PGIL in payment of individual payroll and related income tax withholdings due on returns prepared by E&Y Spain for certain PGIL employees located in Spain from February 2001 to October 2005. E&Y became auditors of the Fund in May 2002. These payroll and tax services were discontinued in November 2005. The annual fee received by E&Y Spain for all such services totaled approximately 9,000 Euro per year. E&Y has informed the Audit Committee that based on its internal reviews and the de minimus nature of the services provided and fees received, E&Y does not believe its independence with respect to the Fund has been impaired or that it is disqualified from acting as independent auditors to the Fund. N/A 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 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. 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 American Income trust By (Signature and Title)* /s/ John F. Cogan, Jr. John F. Cogan, Jr, President Date August 31, 2006 Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. By (Signature and Title)* /s/ John F. Cogan, Jr. John F. Cogan, Jr., President Date August 31, 2006 By (Signature and Title)* /s/ Vincent Nave Vincent Nave, Treasurer Date August 31, 2006 * Print the name and title of each signing officer under his or her signature.