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 811-21569 Pioneer Ibbotson Asset Allocation Series (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: July 31 Date of reporting period: August 1, 2005 through July 31, 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 ------- IBBOTSON ASSET ALLOCATION SERIES Annual Report 7/31/06 [LOGO] PIONEER INVESTMENTS(R) Table of Contents - -------------------------------------------------------------------------------- Letter to Shareowners 2 Market Overview and Outlook 4 Comparing Ongoing Fund Expenses 7 Portfolio Reviews 15 Prices and Distributions 17 Conservative Allocation Fund - Portfolio Summary and Performance Update 19 Moderate Allocation Fund - Portfolio Summary and Performance Update 24 Growth Allocation Fund - Portfolio Summary and Performance Update 29 Aggressive Allocation Fund - Portfolio Summary and Performance Update 34 Schedule of Investments 39 Financial Statements 43 Notes to Financial Statements 65 Report of Independent Registered Public Accounting Firm 77 Trustees, Officers and Service Providers 78 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 July 31, 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 2004-2005 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/Obert 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 this report. These statements should not be relied upon for any other purposes. Past performance is no guarantee of future results, and there is no guarantee that market forecasts discussed will be realized. 3 Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- MARKET OVERVIEW AND OUTLOOK 7/31/06 - -------------------------------------------------------------------------------- In the following interview, portfolio manager Peng Chen, Chief Investment Officer for Ibbotson Associates Advisors, LLC, discusses the market environment and investment strategies that applied to the portfolios in the Pioneer Ibbotson Asset Allocation Series during the annual period ended July 31, 2006. Q. Could you characterize the economic backdrop during the fiscal year? A. The economic situation was difficult to interpret for most of the year. Economic growth was generally healthy, although it experienced a slight slowdown at the end of 2005, before rebounding in the first quarter of 2006. The more recent employment data have failed to provide a clear picture. In particular, job creation in manufacturing has been disappointing. While core inflation (which excludes energy and food) has remained relatively subdued, inflation concerns increased over the year, driven primarily by high energy prices. On the interest rate front, the Federal Reserve began to raise short-term rates in 2004 and continued to tighten gradually throughout our fiscal year. For much of the first half of the period, long-term interest rates were surprisingly stable in the face of the Fed tightening, but they did eventually trend upward and ended the period higher. The environment of rising interest rates led to tepid bond market performance. Most areas of the domestic equity market finished modestly higher, led by value stocks, although prices have basically continued to fluctuate within a range. International equities provided very strong returns over the period. Q. What were the strategic considerations that you applied to the four portfolios in allocating assets? A. Assets have continued to be invested in keeping with the respective broad asset allocation and specific mutual fund targets established for each portfolio. Within the U.S. stock portion of the portfolios, we began the period with a moderate emphasis on value stocks and a corresponding underweighting of more growth-oriented investments. As the period progressed, we removed this overweighting of value stocks in favor of a neutral position between the growth and value categories, reflecting our current view that there is no clear direction that would support an overweighting of either category. With respect to market capitalization, in the second half of the year we introduced a slight overweighting of U.S. large-cap stocks relative to small cap stocks. We did this for a number of reasons. First, although small-cap stocks have historically outperformed large-caps over long periods, there is a cyclical aspect to this performance leadership. After several years of small-cap outperformance, this trend seems to have become less pronounced. In our view this suggests that a cycle of large-cap performance leadership may begin reasonably soon. Supporting this view as well is the fact that small-cap stocks are currently trading at valuations approximately double those for large-caps. Finally, if, as many expect, the economy slows as a result of higher interest rates, large-cap stocks may be more resilient. 4 Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Throughout the period, we have maintained neutral target weightings in the non-U.S. equity market alternatives, both developed and emerging. A strategic emphasis that we maintained for the entire year is within the bond portion of the portfolios, where we have underweighted the long-term bond vehicle, with the difference allocated to the shorter-term fixed-income alternative. While we do not see a clear direction for long-term interest rates over the short term, over time we do expect long-term bond yields to continue to trend higher, with corresponding downward pressure on prices of these issues. In addition, short-term rates have become much more attractive given the Fed's raising of the benchmark rate. In view of these factors, we believe the risk/reward profile is more favorable among shorter term issues. Elsewhere within fixed-income, we have maintained neutral positions in the high-yield bond offering, as well as in the non-U.S. fixed-income option. Finally, we continue to underweight REITs (Real Estate Investment Trusts). REITs are traditionally most attractive to investors seeking income return, and these issues benefited from the period of low interest rates experienced in the recent past. As rates have risen, REIT yields have reached historically low levels relative to Treasury bonds. At the same time, REITs in the aggregate are priced at roughly double the general stock market, as gauged by traditional valuation measures such as price-to-earnings ratio. In addition to appearing fully valued when compared to both bonds and the rest of the stock market, REITs may be vulnerable to higher market interest rate levels, which we expect to lead to continued cooling in the real estate sector. While our underweighting of the sector has not aided performance to date, we believe our current positioning is prudent given this backdrop. Q. What factors are you watching most closely as you determine strategy for the Portfolios going forward? A. Going forward, we will continue to monitor economic indicators and interest rates to evaluate whether we need to adjust the views underlying our strategic allocations. The Federal deficit has been stable around four percent of Gross Domestic Product (GDP); the trade deficit reached a record six percent of GDP; and the absence of household savings persists. While the markets do not seem to be especially focused on these numbers, the persistence of these imbalances is something we are watching. The markets are, however, focused on the Fed's next moves. With the transition to Chairman Bernanke in early 2006, the Fed has announced a shift from a course of measured rate increases to a data-driven approach to policy. As a result, many economists have been paying even more attention than usual to economic releases, which are expected to affect short-term interest rates and, through them, the economy and the markets. On the one hand, we have limited employment growth and core inflation that remains relatively low; on the other hand, core inflation is increasing and GDP growth is solid. Will Chairman Bernanke keep increasing the benchmark rate to 5 Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- MARKET OVERVIEW AND OUTLOOK 7/31/06 (continued) - -------------------------------------------------------------------------------- strengthen his reputation as an inflation hawk, or will he keep the rate stable while waiting for the effects of the 17 consecutive increases to kick in? In the meantime, the U.S. yield curve, which represents the relationship between bond yields and maturities, remains rather flat - meaning there is very little reward for buying longer maturities. The stock market appears to be treading water pending economic data that will enable participants to forecast Fed actions more effectively. We continue to view the financial markets as lacking in clear direction, making appropriate diversification across asset classes vitally important as we enter a new fiscal year. Each portfolio's performance depends on the adviser's skill in determining the strategic asset class allocations, the mix of underlying Pioneer funds, as well as the performance of those underlying funds. The underlying funds' performance may be lower than the performance of the asset class that they were selected to represent. Stocks and bonds can decline due to adverse issuer, market, regulatory, or economic developments. International markets may be less liquid and can be more volatile than U.S. markets. These risk factors, including those associated with currency exchange rates, also apply to investments in international markets, all of which make international markets more volatile and less liquid than investments in domestic markets. Some of the underlying funds can invest in either high-yield securities or small/emerging growth companies. Investments in these types of securities generally are subject to greater volatility than either higher-grade securities or more-established companies, respectively. Before making an investment in any portfolio, you should consider all the risks associated with it. Please see the Portfolio Reviews beginning on page 15 for information on specific weightings and performance for each of the four portfolios in the Pioneer Ibbotson Asset Allocation Series. Any information in this shareholder report regarding market or economic trends or the factors influencing each portfolios' historical or future performance are statements of the opinion of the portfolios' management as of the date of this report. These statements should not be relied upon for any other purposes. Past performance is no guarantee of future results, and there is no guarantee that market forecasts discussed will be realized. 6 Pioneer Ibbotson Conservative Allocation 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 - $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 Ibbotson Conservative Allocation Fund Based on actual returns from February 1, 2006 through July 31, 2006. Share Class A B C Y - ---------------------------------------------------------------------------------------------------- Beginning Account Value On 2/1/06 $1,000.00 $1,000.00 $1,000.00 $1,000.00 Ending Account Value On 7/31/06 $1,000.97 $ 996.20 $ 997.18 $1,000.00 Expenses Paid During Period* $ 7.34 $ 11.78 $ 11.79 $ 9.47 * Expenses are equal to the Fund's annualized expense ratio plus the expense ratios of the underlying funds. The combined totals were 1.48%, 2.38%, 2.38% and 1.91% for Class A, Class B, Class C and Class Y shares, respectively. These combined ratios were multiplied by the average account value over the period, and then multiplied by 181/365 (to reflect the partial year period) to calculate the "Expenses Paid During Period" in the table above. 7 Pioneer Ibbotson Conservative Allocation Fund - -------------------------------------------------------------------------------- COMPARING ONGOING FUND EXPENSES 7/31/06 (continued) - -------------------------------------------------------------------------------- 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 Ibbotson Conservative Allocation Fund Based on a hypothetical 5% per year return before expenses, reflecting the period from February 1, 2006 through July 31, 2006. Share Class A B C Y - ---------------------------------------------------------------------------------------------------- Beginning Account Value On 2/1/06 $1,000.00 $1,000.00 $1,000.00 $1,000.00 Ending Account Value On 7/31/06 $1,017.46 $1,012.99 $1,012.99 $1,015.32 Expenses Paid During Period* $ 7.40 $ 11.88 $ 11.88 $ 9.54 * Expenses are equal to the Fund's annualized expense ratio plus the expense ratios of the underlying funds. The combined totals were 1.48%, 2.38%, 2.38% and 1.91% for Class A, Class B, Class C and Class Y shares, respectively. These combined ratios were multiplied by the average account value over the period, and then multiplied by 181/365 (to reflect the partial year period) to calculate the "Expenses Paid During Period" in the table above. 8 Pioneer Ibbotson Moderate Allocation 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 - $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 Ibbotson Moderate Allocation Fund Based on actual returns from February 1, 2006 through July 31, 2006. Share Class A B C Y - ---------------------------------------------------------------------------------------------------- Beginning Account Value On 2/1/06 $1,000.00 $1,000.00 $1,000.00 $1,000.00 Ending Account Value On 7/31/06 $ 993.00 $ 988.22 $ 989.92 $ 995.66 Expenses Paid During Period* $ 6.92 $ 11.24 $ 10.81 $ 5.20 * Expenses are equal to the Fund's annualized expense ratio plus the expense ratios of the underlying funds. The combined totals were 1.40%, 2.28%, 2.19% and 1.05%, for Class A, Class B, Class C and Class Y shares, respectively. These combined ratios were multiplied by the average account value over the period, and then multiplied by 181/365 (to reflect the partial year period) to calculate the "Expenses Paid During Period" in the table above. 9 Pioneer Ibbotson Moderate Allocation Fund - -------------------------------------------------------------------------------- COMPARING ONGOING FUND EXPENSES 7/31/06 (continued) - -------------------------------------------------------------------------------- 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 Ibbotson Moderate Allocation Fund Based on a hypothetical 5% per year return before expenses, reflecting the period from February 1, 2006 through July 31, 2006. Share Class A B C Y - ---------------------------------------------------------------------------------------------------- Beginning Account Value On 2/1/06 $1,000.00 $1,000.00 $1,000.00 $1,000.00 Ending Account Value On 7/31/06 $1,017.85 $1,013.49 $1,013.93 $1,019.59 Expenses Paid During Period* $ 7.00 $ 11.38 $ 10.94 $ 5.26 * Expenses are equal to the Fund's annualized expense ratio plus the expense ratios of the underlying funds. The combined totals were 1.40%, 2.28%, 2.19% and 1.05%, for Class A, Class B, Class C and Class Y shares, respectively. These combined ratios were multiplied by the average account value over the period, and then multiplied by 181/365 (to reflect the partial year period) to calculate the "Expenses Paid During Period" in the table above. 10 Pioneer Ibbotson Growth Allocation 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 - $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 Ibbotson Growth Allocation Fund Based on actual returns from February 1, 2006 through July 31, 2006. Share Class A B C Y - ---------------------------------------------------------------------------------------------------- Beginning Account Value On 2/1/06 $1,000.00 $1,000.00 $1,000.00 $1,000.00 Ending Account Value On 7/31/06 $ 989.39 $ 985.60 $ 986.35 $ 995.82 Expenses Paid During Period* $ 7.65 $ 11.72 $ 11.18 $ 5.54 * Expenses are equal to the Fund's annualized expense ratio plus the expense ratios of the underlying funds. The combined totals were 1.55%, 2.38%, 2.27% and 1.12%, for Class A, Class B, Class C and Class Y shares, respectively. These combined ratios were multiplied by the average account value over the period, and then multiplied by 181/365 (to reflect the partial year period) to calculate the "Expenses Paid During Period" in the table above. 11 Pioneer Ibbotson Growth Allocation Fund - -------------------------------------------------------------------------------- COMPARING ONGOING FUND EXPENSES 7/31/06 (continued) - -------------------------------------------------------------------------------- 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 Ibbotson Growth Allocation Fund Based on a hypothetical 5% per year return before expenses, reflecting the period from February 1, 2006 through July 31, 2006. Share Class A B C Y - ---------------------------------------------------------------------------------------------------- Beginning Account Value On 2/1/06 $1,000.00 $1,000.00 $1,000.00 $1,000.00 Ending Account Value On 7/31/06 $1,017.11 $1,012.99 $1,013.54 $1,019.24 Expenses Paid During Period* $ 7.75 $ 11.88 $ 11.33 $ 5.61 * Expenses are equal to the Fund's annualized expense ratio plus the expense ratios of the underlying funds. The combined totals were 1.55%, 2.38%, 2.27% and 1.12%, for Class A, Class B, Class C and Class Y shares, respectively. These combined ratios were multiplied by the average account value over the period, and then multiplied by 181/365 (to reflect the partial year period) to calculate the "Expenses Paid During Period" in the table above. 12 Pioneer Ibbotson Aggressive Allocation 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 - $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 Ibbotson Aggressive Allocation Fund Based on actual returns from February 1, 2006 through July 31, 2006. Share Class A B C Y - ---------------------------------------------------------------------------------------------------- Beginning Account Value On 2/1/06 $1,000.00 $1,000.00 $1,000.00 $1,000.00 Ending Account Value On 7/31/06 $ 985.67 $ 981.74 $ 982.83 $ 986.52 Expenses Paid During Period* $ 8.32 $ 12.33 $ 11.95 $ 6.06 * Expenses are equal to the Fund's annualized expense ratio plus the expense ratios of the underlying funds. The combined totals were 1.69%, 2.51%, 2.43% and 1.23%, for Class A, Class B, Class C and Class Y shares, respectively. These combined ratios were multiplied by the average account value over the period, and then multiplied by 181/365 (to reflect the partial year period) to calculate the "Expenses Paid During Period" in the table above. 13 Pioneer Ibbotson Aggressive Allocation Fund - -------------------------------------------------------------------------------- COMPARING ONGOING FUND EXPENSES 7/31/06 (continued) - -------------------------------------------------------------------------------- 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 Ibbotson Aggressive Allocation Fund Based on a hypothetical 5% per year return before expenses, reflecting the period from February 1, 2006 through July 31, 2006. Share Class A B C Y - ---------------------------------------------------------------------------------------------------- Beginning Account Value On 2/1/06 $1,000.00 $1,000.00 $1,000.00 $1,000.00 Ending Account Value On 7/31/06 $1,016.41 $1,012.35 $1,012.74 $1,018.70 Expenses Paid During Period* $ 8.45 $ 12.52 $ 12.13 $ 6.16 * Expenses are equal to the Fund's annualized expense ratio plus the expense ratios of the underlying funds. The combined totals were 1.69%, 2.51%, 2.43% and 1.23%, for Class A, Class B, Class C and Class Y shares, respectively. These combined ratios were multiplied by the average account value over the period, and then multiplied by 181/365 (to reflect the partial year period) to calculate the "Expenses Paid During Period" in the table above. 14 Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- PORTFOLIO REVIEWS 7/31/06 - -------------------------------------------------------------------------------- Conservative Allocation The Fund's total return for the annual period ended July 31, 2006, was 3.33% for Class A shares, at net asset value. The Fund targeted an asset allocation of 30% equities and 70% fixed-income during the period. Within the equity portion of the Fund, Pioneer International Equity Fund was the largest holding at 7.2% of assets on July 31, 2006. Pioneer Oak Ridge Large Cap Growth Fund was the next largest equity holding at 7.0% of assets. Large capitalization holdings were weighted slightly above target at the end of the period, reflecting management's view that these stocks were more attractive than their smaller cap counterparts. Within the fixed-income portion of the Fund, the largest holding at the end of the period was in a shorter duration bond fund, Pioneer Short Term Income Fund, at 23.9%, followed by Pioneer Bond Fund at 16.0% of assets. Moderate Allocation The Fund's total return for the annual period ended July 31, 2006, was 4.98% for Class A shares, at net asset value. The Portfolio targeted an asset allocation of 60% equities, 40% fixed-income during the period. Within the equity portion of the Portfolio, Pioneer Oak Ridge Large Cap Growth Fund was the largest holding at 13.7% of assets on July 31, 2006. Pioneer International Equity Fund was the next largest equity holding at 11.4% of assets. Large capitalization holdings were weighted slightly above target at the end of the period, reflecting management's view that these stocks were more attractive than their smaller cap counterparts. Within the fixed-income portion of the Fund, the largest holding at the end of the period was in a shorter duration bond fund, Pioneer Short Term Income Fund, at 16.0%, followed by Pioneer Bond Fund at 9.1% of assets. Growth Allocation The Fund's total return for the annual period ended July 31, 2006 was 6.29% for Class A shares, at net asset value. The Portfolio targeted an asset allocation of 75% equities, 25% fixed-income during the period. Within the equity portion of the fund, Pioneer International Equity Fund was the largest holding at 15.3% of assets on July 31, 2006. The largest domestic equity allocation was to Pioneer Oak Ridge Large Cap Growth Fund (13.5%) followed by Pioneer Research Fund (11.2%). Large capitalization holdings were weighted slightly above target at the end of the period, reflecting 15 Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- PORTFOLIO REVIEWS 7/31/06 (continued) - -------------------------------------------------------------------------------- management's view that these stocks were more attractive than their smaller cap counterparts. Within the fixed-income portion of the Fund, the largest holding at the end of the period was in a shorter term bond fund, Pioneer Short Term Income Fund, at 11.8% of assets, while Pioneer Bond Fund represented 8.0% of assets. Aggressive Allocation The Fund's total return for the annual period ended July 31, 2006 was 7.30% for Class A shares. The Fund targeted an asset allocation of 90% equities, 10% fixed-income during the period. Within the equity portion of the fund, Pioneer International Equity Fund was the largest holding at 20.3% of assets on July 31, 2006. On the domestic side, Pioneer Oak Ridge Large Cap Growth Fund (14.9%) and Pioneer Research Fund (14.3%) were the largest holdings. Large capitalization holdings were weighted slightly above target at the end of the period, reflecting management's view that these stocks were more attractive than their smaller cap counterparts. The fixed-income portion of the Fund was invested in a longer term bond fund, Pioneer Bond Fund, at 6.1% of assets, while Pioneer Short Term Income Fund represented 3.0% of assets. 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. 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. Any information in this shareholder report regarding market or economic trends or the factors influencing each portfolios' historical or future performance are statements of the opinion of the portfolios' management as of the date of this report. These statements should not be relied upon for any other purposes. Past performance is no guarantee of future results, and there is no guarantee that market forecasts discussed will be realized. 16 Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- PRICES AND DISTRIBUTIONS - -------------------------------------------------------------------------------- Net Asset Value Per Share - -------------------------------------------------------------------------------- Conservative Allocation Fund Class 7/31/06 7/31/05 - ------- --------- -------- A $10.56 $10.29 B $10.44 $10.28 C $10.44 $10.26 7/31/06 10/5/05 --------- -------- Y $10.57 $10.32 Moderate Allocation Fund Class 7/31/06 7/31/05 - ------- --------- -------- A $11.39 $11.15 B $10.92 $10.77 C $10.85 $10.68 7/31/06 9/26/05 --------- -------- Y $11.43 $11.18 Growth Allocation Fund Class 7/31/06 7/31/05 - ------- --------- -------- A $12.04 $11.50 B $10.93 $10.51 C $11.58 $11.10 7/31/06 9/26/05 --------- -------- Y $12.13 $11.54 Aggressive Allocation Fund Class 7/31/06 7/31/05 - ------- --------- -------- A $12.39 $11.82 B $11.84 $11.39 C $12.00 $11.54 7/31/06 9/26/05 --------- -------- Y $12.41 $11.87 17 Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- PRICES AND DISTRIBUTIONS (continued) - -------------------------------------------------------------------------------- Distributions Per Share - -------------------------------------------------------------------------------- Conservative Allocation Fund 8/1/05 - 7/31/06 ---------------- Net Investment Short-Term Long-Term Class Income Capital Gains Capital Gains - ------- ------ ------------- ------------- A $0.0633 $ - $0.0086 B $0.0633 $ - $0.0086 C $0.0633 $ - $0.0086 Y $0.0633 $ - $0.0086 Moderate Allocation Fund 8/1/05 - 7/31/06 ---------------- Net Investment Short-Term Long-Term Class Income Capital Gains Capital Gains - ------- ------ ------------- ------------- A $0.0645 $ - $0.2446 B $0.0320 $ - $0.2446 C $0.0149 $ - $0.2446 Y $0.0774 $ - $0.2446 Growth Allocation Fund 8/1/05 - 7/31/06 ---------------- Net Investment Short-Term Long-Term Class Income Capital Gains Capital Gains - ------- ------ ------------- ------------- A $ 0.0493 $ - $0.129 B $ 0.0185 $ - $0.129 C $ - $ - $0.129 Y $0.0642 $ - $0.129 Aggressive Allocation Fund 8/1/05 - 7/31/06 ---------------- Net Investment Short-Term Long-Term Class Income Capital Gains Capital Gains - ------- ------ ------------- ------------- A $0.0162 $ - $0.2687 B $ - $ - $0.2687 C $ - $ - $0.2687 Y $0.0281 $ - $0.2687 18 Pioneer Ibbotson Conservative Allocation Fund - -------------------------------------------------------------------------------- PORTFOLIO SUMMARY 7/31/06 - -------------------------------------------------------------------------------- Target Asset Allocations - -------------------------------------------------------------------------------- (The following table is depicted as a pie chart in the printed material) Fixed Income 70% Equity 30% Short Term Bond 27.00% - ------------------------------------------------------------- Domestic Corporate Bonds 17.00 - ------------------------------------------------------------- Cash & Cash Equivalents 13.00 - ------------------------------------------------------------- High-Yield Corporate Bonds 13.00 - ------------------------------------------------------------- Large-Cap Growth 9.00 - ------------------------------------------------------------- Large-Cap Value 9.00 - ------------------------------------------------------------- International Equities 8.00 - ------------------------------------------------------------- Mid/Small Cap Value 2.00 - ------------------------------------------------------------- Mid/Small Cap Growth 2.00 - ------------------------------------------------------------- Real Estate Investment Trusts (REITs) 0.00 - ------------------------------------------------------------- Emerging Market 0.00 - ------------------------------------------------------------- Actual Portfolio Holdings (based on total portfolio) - -------------------------------------------------------------------------------- U.S. Stocks International Stocks - ----------------------------------------- ------------------------------------ Pioneer Research 7.90% Pioneer International Equity 8.10% - ----------------------------------------- ------------------------------------ Pioneer Oak Ridge Large Cap Growth 7.88 Bonds - ----------------------------------------- ------------------------------------ Pioneer Fund 4.56 Pioneer Short Term Income 27.04 - ----------------------------------------- ------------------------------------ Pioneer Cullen Value 3.36 Pioneer Bond 18.09 - ----------------------------------------- ------------------------------------ Pioneer Small Cap Value 1.57 Pioneer High Yield 11.32 - ----------------------------------------- ------------------------------------ Pioneer Mid Cap Growth 1.13 Pioneer Government Income 4.52 - ----------------------------------------- ------------------------------------ Pioneer Value 1.13 Pioneer Strategic Income 3.40 - ----------------------------------------- ------------------------------------ This list excludes temporary cash and derivative instruments. Portfolio holdings will vary for other periods. The holdings listed should not be considered recommendations to buy or sell any security listed. 19 Pioneer Ibbotson Conservative Allocation Fund - -------------------------------------------------------------------------------- PERFORMANCE UPDATE 7/31/06 CLASS A SHARES - -------------------------------------------------------------------------------- Investment Returns - -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Pioneer Ibbotson Conservative Allocation Fund at public offering price, compared to that of the Standard & Poor's 500 Stock Index and Lehman Brothers Aggregate Bond Index. Average Annual Total Returns (As of July 31, 2006) Net Asset Public Offering Period Value (NAV) Price (POP) Life-of-Class (5/12/05) 5.41% 0.41% 1 Year 3.33 -2.35 (The following table is depicted as a mountain chart in the printed material) Value of $10,000 Investment 5/06 9425 10000 10000 7/06 9599 10387 9963 7/06 9947 10945 10108 Pioneer Ibbotson Conservative Allocation Fund Standard & Poor's 500 Stock Index Lehman Brothers Aggregate Bond Index Call 1-800-225-6292 or visit www.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. NAV results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. POP returns reflect deduction of maximum 5.75% 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 Standard & Poor's 500 Stock Index (the S&P 500) is a commonly used measure of the broad U.S. stock market. 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. 20 Pioneer Ibbotson Conservative Allocation Fund - -------------------------------------------------------------------------------- PERFORMANCE UPDATE 7/31/06 CLASS B SHARES - -------------------------------------------------------------------------------- Investment Returns - -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Pioneer Ibbotson Conservative Allocation Fund, compared to that of the Standard & Poor's 500 Stock Index and Lehman Brothers Aggregate Bond Index. Average Annual Total Returns (As of July 31, 2006) If If Period Held Redeemed Life-of-Class (5/12/05) 4.43% 1.17% 1 Year 2.26 -1.44 (The following table is depicted as a mountain chart in the printed material) Value of 10,000 Investment 5/06 10000 10000 10000 7/06 10178 10387 9963 7/06 10038 10945 10108 Pioneer Ibbotson Conservative Allocation Fund Standard & Poor's 500 Stock Index Lehman Brothers Aggregate Call 1-800-225-6292 or visit www.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. "If Held" results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. "If redeemed" returns reflect the deduction of applicable contingent deferred sales charge (CDSC). Effective December 1, 2004, the period during which a CDSC is applied to withdrawals was shortened to 5 years. The maximum CDSC for Class B shares continues to be 4%. For more complete information, please see the prospectus for details. Note: Shares purchased prior to December 1, 2004 remain subject to the CDSC in effect at the time you purchased those shares. For performance information for shares purchased prior to December 1, 2004, please visit www.pioneerinvestments.com/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 Standard & Poor's 500 Stock Index (the S&P 500) is a commonly used measure of the broad U.S. stock market. 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. 21 Pioneer Ibbotson Conservative Allocation Fund - -------------------------------------------------------------------------------- PERFORMANCE UPDATE 7/31/06 CLASS C SHARES - -------------------------------------------------------------------------------- Investment Returns - -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Pioneer Ibbotson Conservative Allocation Fund, compared to that of the Standard & Poor's 500 Stock Index and Lehman Brothers Aggregate Bond Index. Average Annual Total Returns (As of July 31, 2006) If If Period Held Redeemed Life-of-Class (5/12/05) 4.43% 4.43% 1 Year 2.46 2.76 (The following table is depicted as a mountain chart in the printed material) Value of 10,000 Investment 5/06 10000 10000 10000 7/06 10168 10387 9963 7/06 10449 10945 10108 Pioneer Ibbotson Conservative Allocation Fund Standard & Poor's 500 Stock Index Lehman Brothers Aggregate Call 1-800-225-6292 or visit www.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Class C shares held for less than one year are also subject to a 1% contingent deferred sales charge (CDSC). "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 Standard & Poor's 500 Stock Index (the S&P 500) is a commonly used measure of the broad U.S. stock market. 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. 22 Pioneer Ibbotson Conservative Allocation Fund - -------------------------------------------------------------------------------- PERFORMANCE UPDATE 7/31/06 CLASS Y SHARES - -------------------------------------------------------------------------------- Investment Returns - -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Pioneer Ibbotson Conservative Allocation Fund, compared to that of the Standard & Poor's 500 Stock Index and Lehman Brothers Aggregate Bond Index. Average Annual Total Returns (As of July 31, 2006) If If Period Held Redeemed Life-of-Class (5/12/05) 5.41% 5.41% 1 Year 3.13 3.63 (The following table is depicted as a mountain chart in the printed material) Value of 10,000 Investment 5/06 10000 10000 10000 7/06 10188 10387 9963 7/06 10558 10945 10108 Pioneer Ibbotson Conservative Allocation Fund Standard & Poor's 500 Stock Index Lehman Brothers Aggregate Bond Index Call 1-800-225-6292 or visit www.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Performance for periods prior to the inception of the Fund's Class Y shares reflects the NAV performance of the Fund's Class A shares. The performance does not reflect differences in expenses, including the Rule 12b-1 fees applicable to Class A shares. Since fees for Class A shares are generally higher than those of Class Y shares, the performance shown for Class Y shares prior to their inception would have been higher. Class A shares are used as a proxy through October 5, 2005, the inception date of Class Y shares. Class Y shares are not subject to sales charges and are available for limited groups of eligible investors, including institutional investors. 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 Standard & Poor's 500 Stock Index (the S&P 500) is a commonly used measure of the broad U.S. stock market. 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. 23 Pioneer Ibbotson Moderate Allocation Fund - -------------------------------------------------------------------------------- PORTFOLIO SUMMARY 7/31/06 - -------------------------------------------------------------------------------- Target Asset Allocations - -------------------------------------------------------------------------------- (The following table is depicted as a pie chart in the printed material) Equity 60% Fixed Income 40% Short Term Bond 17.00% - ------------------------------------------------------------ Large-Cap Growth 15.50 - ------------------------------------------------------------ Large-Cap Value 15.50 - ------------------------------------------------------------ International Equities 12.00 - ------------------------------------------------------------ Domestic Corporate Bonds 9.00 - ------------------------------------------------------------ High-Yield Corporate Bonds 8.00 - ------------------------------------------------------------ Mid/Small Cap Value 6.00 - ------------------------------------------------------------ Cash & Cash Equivalents 6.00 - ------------------------------------------------------------ Mid/Small Cap Growth 6.00 - ------------------------------------------------------------ Real Estate Investment Trusts (REITs) 3.00 - ------------------------------------------------------------ Emerging Market 2.00 - ------------------------------------------------------------ Actual Portfolio Holdings (based on total portfolio) - -------------------------------------------------------------------------------- U.S. Stocks International Stocks - ------------------------------------------ ------------------------------------ Pioneer Oak Ridge Large Cap Growth 14.35% Pioneer International Equity 11.95% - ------------------------------------------ ------------------------------------ Pioneer Research 10.48 Pioneer Emerging Markets 2.07 - ------------------------------------------ ------------------------------------ Pioneer Fund 7.36 Bonds - ------------------------------------------ ------------------------------------ Pioneer Cullen Value 3.43 Pioneer Short Term Income 16.81 - ------------------------------------------ ------------------------------------ Pioneer Real Estate 3.30 Pioneer Bond 9.58 - ------------------------------------------ ------------------------------------ Pioneer Value 3.16 Pioneer High Yield 6.34 - ------------------------------------------ ------------------------------------ Pioneer Mid Cap Growth 2.62 Pioneer Government Income 3.43 - ------------------------------------------ ------------------------------------ Pioneer Small Cap Value 2.08 - ------------------------------------------ Pioneer Growth Opportunities 2.01 - ------------------------------------------ Pioneer Mid Cap Value 1.03 - ------------------------------------------ This list excludes temporary cash and derivative instruments. Portfolio holdings will vary for other periods. The holdings listed should not be considered recommendations to buy or sell any security listed. 24 Pioneer Ibbotson Moderate Allocation Fund - -------------------------------------------------------------------------------- PERFORMANCE UPDATE 7/31/06 CLASS A SHARES - -------------------------------------------------------------------------------- Investment Returns - -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Pioneer Ibbotson Moderate Allocation Fund at public offering price, compared to that of the Standard & Poor's 500 Stock Index and Lehman Brothers Aggregate Bond Index. Average Annual Total Returns (As of July 31, 2006) Net Asset Public Offering Period Value (NAV) Price (POP) Life-of-Class (8/9/04) 9.70% 6.46% 1 Year 4.98 -1.06 (The following table is depicted as a mountain chart in the printed material) Value of 10,000 Investment 8/06 9425 10000 10000 7/06 10570 11359 10283 7/06 11097 11969 10433 Pioneer Ibbotson Moderate Allocation Fund Standard & Poor's 500 Stock Index Lehman Brothers Aggregate Bond Index Call 1-800-225-6292 or visit www.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. NAV results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. POP returns reflect deduction of maximum 5.75% 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 Standard & Poor's 500 Stock Index (the S&P 500) is a commonly used measure of the broad U.S. stock market. 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. 25 Pioneer Ibbotson Moderate Allocation Fund - -------------------------------------------------------------------------------- PERFORMANCE UPDATE 7/31/06 CLASS B SHARES - -------------------------------------------------------------------------------- Investment Returns - -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Pioneer Ibbotson Moderate Allocation Fund, compared to that of the Standard & Poor's 500 Stock Index and Lehman Brothers Aggregate Bond Index. Average Annual Total Returns (As of July 31, 2006) If If Period Held Redeemed Life-of-Class (8/9/04) 7.10% 5.19% 1 Year 4.00 0.00 (The following table is depicted as a mountain chart in the printed material) Value of 10,000 Investment 8/06 10000 10000 10000 7/06 10978 11359 10283 7/06 11017 11969 10433 Pioneer Ibbotson Moderate Allocation Fund Standard & Poor's 500 Stock Index Lehman Brothers Aggregate Bond Index Call 1-800-225-6292 or visit www.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. "If Held" results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. "If redeemed" returns reflect the deduction of applicable contingent deferred sales charge (CDSC). Effective December 1, 2004, the period during which a CDSC is applied to withdrawals was shortened to 5 years. The maximum CDSC for Class B shares continues to be 4%. For more complete information, please see the prospectus for details. Note: Shares purchased prior to December 1, 2004 remain subject to the CDSC in effect at the time you purchased those shares. For performance information for shares purchased prior to December 1, 2004, please visit www.pioneerinvestments.com/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 Standard & Poor's 500 Stock Index (the S&P 500) is a commonly used measure of the broad U.S. stock market. 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. 26 Pioneer Ibbotson Moderate Allocation Fund - -------------------------------------------------------------------------------- PERFORMANCE UPDATE 7/31/06 CLASS C SHARES - -------------------------------------------------------------------------------- Investment Returns - -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Pioneer Ibbotson Moderate Allocation Fund, compared to that of the Standard & Poor's 500 Stock Index and Lehman Brothers Aggregate Bond Index. Average Annual Total Returns (As of July 31, 2006) If If Period Held Redeemed Life-of-Class (8/9/04) 6.79% 6.79% 1 Year 4.06 4.06 (The following table is depicted as a mountain chart in the printed material) Value of 10,000 Investment 8/06 10000 10000 10000 7/06 11122 11359 10283 7/06 11583 11969 10433 Pioneer Ibbotson Moderate Allocation Fund Standard & Poor's 500 Stock Index Lehman Brothers Aggregate Bond Index 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 share1s, 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). "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 Standard & Poor's 500 Stock Index (the S&P 500) is a commonly used measure of the broad U.S. stock market. 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. 27 Pioneer Ibbotson Moderate Allocation Fund - -------------------------------------------------------------------------------- PERFORMANCE UPDATE 7/31/06 CLASS Y SHARES - -------------------------------------------------------------------------------- Investment Returns - -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Pioneer Ibbotson Moderate Allocation Fund, compared to that of the Standard & Poor's 500 Stock Index and Lehman Brothers Aggregate Bond Index. Average Annual Total Returns (As of July 31, 2006) If If Period Held Redeemed Life-of-Class (8/9/04) 9.96% 9.96% 1 Year 5.19 5.19 (The following table is depicted as a mountain chart in the printed material) Value of 10,000 Investment 8/06 10000 10000 10000 7/06 11213 11359 10283 7/06 11826 11969 10433 Pioneer Ibbotson Moderate Allocation Fund Standard & Poor's 500 Stock Index Lehman Brothers Aggregate Bond Index Call 1-800-225-6292 or visit www.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Performance for periods prior to the inception of the Fund's Class Y shares reflects the NAV performance of the Fund's Class A shares. The performance does not reflect differences in expenses, including the Rule 12b-1 fees applicable to Class A shares. Since fees for Class A shares are generally higher than those of Y shares, the performance shown for Class Y shares prior to their inception would have been higher. Class A shares are used as a proxy through September 26, 2005 the inception date of Class Y shares. Class Y shares are not subject to sales charges and are available for limited groups of eligible investors, including institutional investors. 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 Standard & Poor's 500 Stock Index (the S&P 500) is a commonly used measure of the broad U.S. stock market. 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. 28 Pioneer Ibbotson Growth Allocation Fund - -------------------------------------------------------------------------------- PORTFOLIO SUMMARY 7/31/06 - -------------------------------------------------------------------------------- Target Asset Allocations - -------------------------------------------------------------------------------- (The following table is depicted as a pie chart in the printed material) Equity 75% Fixed Income 25% Large-Cap Value 17.50% - ------------------------------------------------------------- Large-Cap Growth 16.50 - ------------------------------------------------------------- International Equities 16.00 - ------------------------------------------------------------- Short Term Bond 12.50 - ------------------------------------------------------------- Mid/Small Cap Growth 8.50 - ------------------------------------------------------------- Mid/Small Cap Value 8.50 - ------------------------------------------------------------- Domestic Corporate Bonds 7.50 - ------------------------------------------------------------- High-Yield Corporate Bonds 5.00 - ------------------------------------------------------------- Emerging Market 4.00 - ------------------------------------------------------------- Real Estate Investment Trusts (REITs) 4.00 - ------------------------------------------------------------- Cash & Cash Equivalents 0.00 - ------------------------------------------------------------- Actual Portfolio Holdings (based on total portfolio) - -------------------------------------------------------------------------------- U.S. Stocks International Stocks - ------------------------------------------- -------------------------------------- Pioneer Oak Ridge Large Cap Growth 13.46% Pioneer International Equity 15.23% - ------------------------------------------- ------------------------------------- Pioneer Research 11.14 Pioneer Emerging Markets 4.13 - ------------------------------------------- -------------------------------------- Pioneer Fund 7.95 Bonds - ------------------------------------------- -------------------------------------- Pioneer Cullen Value 4.35 Pioneer Short Term Income 11.80 - ------------------------------------------- -------------------------------------- Pioneer Real Estate 4.12 Pioneer Bond 7.96 - ------------------------------------------- -------------------------------------- Pioneer Value 3.96 Pioneer High Yield 2.97 - ------------------------------------------- -------------------------------------- Pioneer Mid Cap Growth 3.87 Pioneer Government Income 1.59 - ------------------------------------------- -------------------------------------- Pioneer Growth Opportunities 3.67 - ------------------------------------------- Pioneer Small Cap Value 1.97 - ------------------------------------------- Pioneer Mid Cap Value 1.83 - ------------------------------------------- This list excludes temporary cash and derivative instruments. Portfolio holdings will vary for other periods. The holdings listed should not be considered recommendations to buy or sell any security listed. 29 Pioneer Ibbotson Growth Allocation Fund - -------------------------------------------------------------------------------- PERFORMANCE UPDATE 7/31/06 CLASS A SHARES - -------------------------------------------------------------------------------- Investment Returns - -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Pioneer Ibbotson Growth Allocation Fund at public offering price, compared to that of the Standard & Poor's 500 Stock Index and Lehman Brothers Aggregate Bond Index. Average Annual Total Returns (As of July 31, 2006) Net Asset Public Offering Period Value (NAV) Price (POP) Life-of-Class (8/9/04) 12.13% 8.82% 1 Year 6.29 0.19 (The following table is depicted as a mountain chart in the printed material) Value of 10,000 Investment 8/06 9425 10000 10000 7/06 10892 11359 10283 7/06 11577 11969 10433 Pioneer Ibbotson Growth Allocation Fund Standard & Poor's 500 Stock Index Lehman Brothers Aggregate Bond Index Call 1-800-225-6292 or visit www.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. NAV results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. POP returns reflect deduction of maximum 5.75% 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 Standard & Poor's 500 Stock Index (the S&P 500) is a commonly used measure of the broad U.S. stock market. 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. 30 Pioneer Ibbotson Growth Allocation Fund - -------------------------------------------------------------------------------- PERFORMANCE UPDATE 7/31/06 CLASS B SHARES - -------------------------------------------------------------------------------- Investment Returns - -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Pioneer Ibbotson Growth Allocation Fund, compared to that of the Standard & Poor's 500 Stock Index and Lehman Brothers Aggregate Bond Index. Average Annual Total Returns (As of July 31, 2006) If If Period Held Redeemed Life-of-Class (8/9/04) 6.64% 4.72% 1 Year 5.53 1.53 (The following table is depicted as a mountain chart in the printed material) Value of 10,000 Investment 8/06 10000 10000 10000 7/06 11056 11359 10283 7/06 11257 11969 10433 Pioneer Ibbotson Growth Allocation Fund Standard & Poor's 500 Stock Index Lehman Brothers Aggregate Bond Index Call 1-800-225-6292 or visit www.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. "If Held" results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. "If redeemed" returns reflect the deduction of applicable contingent deferred sales charge (CDSC). Effective December 1, 2004, the period during which a CDSC is applied to withdrawals was shortened to 5 years. The maximum CDSC for Class B shares continues to be 4%. For more complete information, please see the prospectus for details. Note: Shares purchased prior to December 1, 2004 remain subject to the CDSC in effect at the time you purchased those shares. For performance information for shares purchased prior to December 1, 2004, please visit www.pioneerinvestments.com/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 Standard & Poor's 500 Stock Index (the S&P 500) is a commonly used measure of the broad U.S. stock market. 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. 31 Pioneer Ibbotson Growth Allocation Fund - -------------------------------------------------------------------------------- PERFORMANCE UPDATE 7/31/06 CLASS C SHARES - -------------------------------------------------------------------------------- Investment Returns - -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Pioneer Ibbotson Growth Allocation Fund, compared to that of the Standard & Poor's 500 Stock Index and Lehman Brothers Aggregate Bond Index. Average Annual Total Returns (As of July 31, 2006) If If Period Held Redeemed Life-of-Class (8/9/04) 9.64% 9.64% 1 Year 5.51 5.51 (The following table is depicted as a mountain chart in the printed material) Value of 10,000 Investment 8/06 10000 10000 10000 7/06 11310 11359 10283 7/06 11933 11969 10433 Pioneer Ibbotson Growth Allocation Fund Standard & Poor's 500 Stock Index Lehman Brothers Aggregate Bond Index Call 1-800-225-6292 or visit www.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Class C shares held for less than one year are also subject to a 1% contingent deferred sales charge (CDSC). "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 Standard & Poor's 500 Stock Index (the S&P 500) is a commonly used measure of the broad U.S. stock market. 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. 32 Pioneer Ibbotson Growth Allocation Fund - -------------------------------------------------------------------------------- PERFORMANCE UPDATE 7/31/06 CLASS Y SHARES - -------------------------------------------------------------------------------- Investment Returns - -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Pioneer Ibbotson Growth Allocation Fund, compared to that of the Standard & Poor's 500 Stock Index and Lehman Brothers Aggregate Bond Index. Average Annual Total Returns (As of July 31, 2006) If If Period Held Redeemed Life-of-Class (8/9/04) 12.62% 12.62% 1 Year 6.84 6.84 (The following table is depicted as a mountain chart in the printed material) Value of 10,000 Investment 8/06 10000 10000 10000 7/06 11553 11359 10283 7/06 12387 11969 10433 Pioneer Ibbotson Growth Allocation Fund Standard & Poor's 500 Stock Index Lehman Brothers Aggregate Bond Index Call 1-800-225-6292 or visit www.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Performance for periods prior to the inception of the Fund's Class Y shares reflects the NAV performance of the Fund's Class A shares. The performance does not reflect differences in expenses, including the Rule 12b-1 fees applicable to Class A shares. Since fees for Class A shares are generally higher than those of Class Y shares, the performance shown for Class Y shares prior to their inception would have been higher. Class A shares are used as a proxy through September 26, 2005 the inception date of Class Y shares. Class Y shares are not subject to sales charges and are available for limited groups of eligible investors, including institutional investors. 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 Standard & Poor's 500 Stock Index (the S&P 500) is a commonly used measure of the broad U.S. stock market. 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. 33 Pioneer Ibbotson Aggressive Allocation Fund - -------------------------------------------------------------------------------- PORTFOLIO SUMMARY 7/31/06 - -------------------------------------------------------------------------------- Target Asset Allocations - -------------------------------------------------------------------------------- (The following table is depicted as a mountain chart in the printed material) Equity 90% Fixed Income 10% International Equities 21.00% - ------------------------------------------------------------- Large-Cap Growth 19.00 - ------------------------------------------------------------- Large-Cap Value 19.00 - ------------------------------------------------------------- Mid/Small Cap Growth 10.50 - ------------------------------------------------------------- Mid/Small Cap Value 10.50 - ------------------------------------------------------------- Domestic Corporate Bonds 7.00 - ------------------------------------------------------------- Emerging Market 5.00 - ------------------------------------------------------------- Real Estate Investment Trusts (REITs) 5.00 - ------------------------------------------------------------- Short Term Bond 3.00 - ------------------------------------------------------------- High-Yield Corporate Bonds 0.00 - ------------------------------------------------------------- Cash & Cash Equivalents 0.00 - ------------------------------------------------------------- Actual Portfolio Holdings (based on total portfolio) - -------------------------------------------------------------------------------- U.S. Stocks International Stocks - ------------------------------------------- --------------------------------------- Pioneer Oak Ridge Large Cap Growth 14.84% Pioneer International Equity 20.15% - ------------------------------------------- --------------------------------------- Pioneer Research 14.19 Pioneer Emerging Markets 5.15 - ------------------------------------------- --------------------------------------- Pioneer Fund 8.93 Bonds - ------------------------------------------- --------------------------------------- Pioneer Cullen Value 5.39 Pioneer Bond 6.02 - ------------------------------------------- --------------------------------------- Pioneer Real Estate 5.09 Pioneer Short Term Income 2.96 - ------------------------------------------- --------------------------------------- Pioneer Mid Cap Growth 4.78 - ------------------------------------------- Pioneer Growth Opportunities 4.68 - ------------------------------------------- Pioneer Value 3.95 - ------------------------------------------- Pioneer Small Cap Value 2.88 - ------------------------------------------- Pioneer Mid Cap Value 0.99 - ------------------------------------------- This list excludes temporary cash and derivative instruments. Portfolio holdings will vary for other periods. The holdings listed should not be considered recommendations to buy or sell any security listed. 34 Pioneer Ibbotson Aggressive Allocation Fund - -------------------------------------------------------------------------------- PERFORMANCE UPDATE 7/31/06 CLASS A SHARES - -------------------------------------------------------------------------------- Investment Returns - -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Pioneer Ibbotson Aggressive Allocation Fund at public offering price, compared to that of the Standard & Poor's 500 Stock Index and Lehman Brothers Aggregate Bond Index. Average Annual Total Returns (As of July 31, 2006) Net Asset Public Offering Period Value (NAV) Price (POP) Life-of-Class (8/9/04) 14.40% 11.02% 1 Year 7.30 1.14 (The following table is depicted as a mountain chart in the printed material) Value of 10,000 Investment 8/06 9425 10000 10000 7/06 11173 11359 10283 7/06 11989 11969 10433 Pioneer Ibbotson Aggressive Allocation Fund Standard & Poor's 500 Stock Index Lehman Brothers Aggregate Bond Index Call 1-800-225-6292 or visit www.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. NAV results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. POP returns reflect deduction of maximum 5.75% 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 Standard & Poor's 500 Stock Index (the S&P 500) is a commonly used measure of the broad U.S. stock market. 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. 35 Pioneer Ibbotson Aggressive Allocation Fund - -------------------------------------------------------------------------------- PERFORMANCE UPDATE 7/31/06 CLASS B SHARES - -------------------------------------------------------------------------------- Investment Returns - -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Pioneer Ibbotson Aggressive Allocation Fund, compared to that of the Standard & Poor's 500 Stock Index and Lehman Brothers Aggregate Bond Index. Average Annual Total Returns (As of July 31, 2006) If If Period Held Redeemed Life-of-Class (8/9/04) 11.77% 9.93% 1 Year 6.36 2.36 (The following table is depicted as a mountain chart in the printed material) Value of 10,000 Investment 8/06 10000 10000 10000 7/06 11690 11359 10283 7/06 12045 11969 10433 Pioneer Ibbotson Aggressive Allocation Fund Standard & Poor's 500 Stock Index Lehman Brothers Aggregate Bond Index Call 1-800-225-6292 or visit www.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. "If Held" results represent the percent change in net asset value per share. Returns would have been lower had sales charges been reflected. "If redeemed" returns reflect the deduction of applicable contingent deferred sales charge (CDSC). Effective December 1, 2004, the period during which a CDSC is applied to withdrawals was shortened to 5 years. The maximum CDSC for Class B shares continues to be 4%. For more complete information, please see the prospectus for details. Note: Shares purchased prior to December 1, 2004 remain subject to the CDSC in effect at the time you purchased those shares. For performance information for shares purchased prior to December 1, 2004, please visit www.pioneerinvestments.com/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 Standard & Poor's 500 Stock Index (the S&P 500) is a commonly used measure of the broad U.S. stock market. 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. 36 Pioneer Ibbotson Aggressive Allocation Fund - -------------------------------------------------------------------------------- PERFORMANCE UPDATE 7/31/06 CLASS C SHARES - -------------------------------------------------------------------------------- Investment Returns - -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Pioneer Ibbotson Aggressive Allocation Fund, compared to that of the Standard & Poor's 500 Stock Index and Lehman Brothers Aggregate Bond Index. Average Annual Total Returns (As of July 31, 2006) If If Period Held Redeemed Life-of-Class (8/9/04) 12.49% 12.49% 1 Year 6.37 6.37 (The following table is depicted as a mountain chart in the printed material) Value of 10,000 Investment 8/06 10000 10000 10000 7/06 11563 11359 10283 7/06 12309 11969 10433 Pioneer Ibbotson Aggressive Allocation Fund Standard & Poor's 500 Stock Index Lehman Brothers Aggregate Bond Index Call 1-800-225-6292 or visit www.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Class C shares held for less than one year are also subject to a 1% contingent deferred sales charge (CDSC). "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 Standard & Poor's 500 Stock Index (the S&P 500) is a commonly used measure of the broad U.S. stock market. 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. 37 Pioneer Ibbotson Aggressive Allocation Fund - -------------------------------------------------------------------------------- PERFORMANCE UPDATE 7/31/06 CLASS Y SHARES - -------------------------------------------------------------------------------- Investment Returns - -------------------------------------------------------------------------------- The mountain chart on the right shows the change in value of a $10,000 investment made in Pioneer Ibbotson Aggressive Allocation Fund, compared to that of the Standard & Poor's 500 Stock Index and Lehman Brothers Aggregate Bond Index. Average Annual Total Returns (As of July 31, 2006) If If Period Held Redeemed Life-of-Class (8/9/04) 14.55% 14.55% 1 Year 7.13 7.13 (The following table is depicted as a mountain chart in the printed material) Value of 10,000 Investment 8/06 10000 10000 10000 7/06 11563 11359 10283 7/06 12309 11969 10433 Pioneer Ibbotson Aggressive Allocation Fund Standard & Poor's 500 Stock Index Lehman Brothers Aggregate Bond Index Call 1-800-225-6292 or visit www.pioneerinvestments.com for the most recent month-end performance results. Current performance may be lower or higher than the performance data quoted. The performance data quoted represents past performance, which is no guarantee of future results. Investment return and principal value will fluctuate, and shares, when redeemed, may be worth more or less than their original cost. Performance for periods prior to the inception of the Fund's Class 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 Class A shares. Since fees for Class A shares are generally higher than those of Class 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 September 26, 2005 the inception date of Class Y shares. Class Y shares are not subject to sales charges and are available for limited groups of eligible investors, including institutional investors. 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 Standard & Poor's 500 Stock Index (the S&P 500) is a commonly used measure of the broad U.S. stock market. 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. 38 Pioneer Ibbotson Conservative Allocation Fund - -------------------------------------------------------------------------------- SCHEDULE OF INVESTMENTS 7/31/06 - -------------------------------------------------------------------------------- Shares Value MUTUAL FUNDS - 88.6% PIONEER FUNDS - 88.6% 303,533 Pioneer Bond Fund Class Y $ 2,704,481 ----------- 26,986 Pioneer Cullen Value Fund Class Y 502,758 ----------- 14,614 Pioneer Fund Class Y 681,319 ----------- 73,173 Pioneer Government Income Fund Class Y 676,116 ----------- 157,688 Pioneer High Yield Fund Class Y 1,691,991 ----------- 48,111 Pioneer International Equity Fund Class Y 1,211,442 ----------- 11,607 Pioneer Mid-Cap Growth Fund Class Y 169,115 ----------- 94,022 Pioneer Oak Ridge Large Cap Growth Fund Class Y 1,177,159 ----------- 115,592 Pioneer Research Fund Class Y 1,180,195 ----------- 415,873 Pioneer Short Term Income Fund Class Y 4,042,281 ----------- 7,140 Pioneer Small Cap Value Fund Class Y 234,208 ----------- 49,476 Pioneer Strategic Income Fund Class Y 507,621 ----------- 9,256 Pioneer Value Fund Class Y 168,831 ----------- TOTAL INVESTMENTS IN SECURITIES - 88.6% (Cost $14,962,317) (a) $14,947,517 OTHER ASSETS AND LIABILITIES - 11.4% 1,930,662 ----------- TOTAL NET ASSETS - 100.0% $16,878,179 =========== (a) At July 31, 2006, the net unrealized gain on investments based on cost for federal tax purposes of $14,990,274 was as follows: Aggregate gross unrealized gain for all investments in which there is an excess of value over tax cost $177,966 Aggregate gross unrealized loss for all investments in which there is an excess of tax cost over value (220,723) --------- Net unrealized loss $(42,757) --------- Purchases and sales of securities (excluding temporary cash investments) for the period ended July 31, 2006 aggregated $14,623,855 and $1,177,259, respectively. The accompanying notes are an integral part of these financial statements. 39 Pioneer Ibbotson Moderate Allocation Fund - -------------------------------------------------------------------------------- SCHEDULE OF INVESTMENTS 7/31/06 - -------------------------------------------------------------------------------- Shares Value MUTUAL FUNDS - 95.3% PIONEER FUNDS - 95.3% 2,703,475 Pioneer Bond Fund Class Y $ 24,087,962 ------------ 462,082 Pioneer Cullen Value Fund Class Y 8,608,579 ------------ 175,934 Pioneer Emerging Markets Fund Class Y 5,207,643 ------------ 396,773 Pioneer Fund Class Y 18,497,558 ------------ 931,782 Pioneer Government Income Fund Class Y 8,609,661 ------------ 172,717 Pioneer Growth Opportunities Fund Class Y 5,045,065 ------------ 1,485,032 Pioneer High Yield Fund Class Y 15,934,395 ------------ 1,192,513 Pioneer International Equity Fund Class Y 30,027,477 ------------ 451,484 Pioneer Mid-Cap Growth Fund Class Y 6,578,116 ------------ 108,398 Pioneer Mid-Cap Value Fund Class Y 2,596,121 ------------ 2,881,536 Pioneer Oak Ridge Large Cap Growth Fund Class Y 36,076,827 ------------ 275,219 Pioneer Real Estate Shares Fund Class Y 8,284,080 ------------ 2,580,304 Pioneer Research Fund Class Y 26,344,901 ------------ 4,346,759 Pioneer Short Term Income Fund Class Y 42,250,498 ------------ 159,336 Pioneer Small Cap Value Fund Class Y 5,226,222 ------------ 435,803 Pioneer Value Fund Class Y 7,949,043 ------------ TOTAL INVESTMENTS IN SECURITIES - 95.3% (Cost $240,107,624) (a) $251,324,148 OTHER ASSETS AND LIABILITIES - 4.7% 12,431,396 ------------ TOTAL NET ASSETS - 100.0% $263,755,544 ============ (a) At July 31, 2006, the net unrealized gain on investments based on cost for federal tax purposes of $242,420,828 was as follows: Aggregate gross unrealized gain for all investments in which there is an excess of value over tax cost $13,530,414 Aggregate gross unrealized loss for all investments in which there is an excess of tax cost over value (4,627,094) ---------- Net unrealized gain $8,903,320 ========== Purchases and sales of securities (excluding temporary cash investments) for the period ended July 31, 2006 aggregated $152,059,026 and $111,035,457, respectively. 40 The accompanying notes are an integral part of these financial statements. Pioneer Ibbotson Growth Allocation Fund - -------------------------------------------------------------------------------- SCHEDULE OF INVESTMENTS 7/31/06 Shares Value MUTUAL FUNDS - 100.2% PIONEER FUNDS - 100.2% 1,916,177 Pioneer Bond Fund Class Y $ 17,073,141 ------------ 500,306 Pioneer Cullen Value Fund Class Y 9,320,697 ------------ 299,384 Pioneer Emerging Markets Fund Class Y 8,861,755 ------------ 365,799 Pioneer Fund Class Y 17,053,559 ------------ 369,445 Pioneer Government Income Fund Class Y 3,413,670 ------------ 269,071 Pioneer Growth Opportunities Fund Class Y 7,859,567 ------------ 593,044 Pioneer High Yield Fund Class Y 6,363,367 ------------ 1,297,155 Pioneer International Equity Fund Class Y 32,662,360 ------------ 569,976 Pioneer Mid-Cap Growth Fund Class Y 8,304,554 ------------ 163,374 Pioneer Mid-Cap Value Fund Class Y 3,912,812 ------------ 2,304,809 Pioneer Oak Ridge Large Cap Growth Fund Class Y 28,856,211 ------------ 293,204 Pioneer Real Estate Shares Fund Class Y 8,825,454 ------------ 2,339,522 Pioneer Research Fund Class Y 23,886,521 ------------ 2,602,383 Pioneer Short Term Income Fund Class Y 25,295,161 ------------ 128,575 Pioneer Small Cap Value Fund Class Y 4,217,262 ------------ 465,149 Pioneer Value Fund Class Y 8,484,322 ------------ TOTAL INVESTMENTS IN SECURITIES - 100.2% (Cost $203,463,394) (a) $214,390,413 OTHER ASSETS AND LIABILITIES - (0.2%) (473,547) ------------ TOTAL NET ASSETS - 100.0% $213,916,866 ============ (a) At July 31, 2006, the net unrealized gain on investments based on cost for federal tax purposes of $204,177,019 was as follows: Aggregate gross unrealized gain for all investments in which there is an excess of value over tax cost $13,358,650 Aggregate gross unrealized loss for all investments in which there is an excess of tax cost over value (3,145,256) ----------- Net unrealized gain $10,213,394 =========== Purchases and sales of securities (excluding temporary cash investments) for the period ended July 31, 2006 aggregated $131,898,994 and $44,552,931, respectively. The accompanying notes are an integral part of these financial statements. 41 Pioneer Ibbotson Aggressive Allocation Fund - -------------------------------------------------------------------------------- SCHEDULE OF INVESTMENTS 7/31/06 - -------------------------------------------------------------------------------- Shares Value MUTUAL FUNDS - 100.7% PIONEER FUNDS - 100.7% 920,103 Pioneer Bond Fund Class Y $ 8,198,114 ------------ 394,104 Pioneer Cullen Value Fund Class Y 7,342,154 ------------ 236,942 Pioneer Emerging Markets Fund Class Y 7,013,497 ------------ 260,916 Pioneer Fund Class Y 12,163,893 ------------ 218,347 Pioneer Growth Opportunities Fund Class Y 6,377,929 ------------ 1,090,032 Pioneer International Equity Fund Class Y 27,447,005 ------------ 446,460 Pioneer Mid-Cap Growth Fund Class Y 6,504,927 ------------ 56,103 Pioneer Mid-Cap Value Fund Class Y 1,343,659 ------------ 1,614,756 Pioneer Oak Ridge Large Cap Growth Fund Class Y 20,216,742 ------------ 230,372 Pioneer Real Estate Shares Fund Class Y 6,934,191 ------------ 1,892,350 Pioneer Research Fund Class Y 19,320,891 ------------ 414,668 Pioneer Short Term Income Fund Class Y 4,030,569 ------------ 119,561 Pioneer Small Cap Value Fund Class Y 3,921,617 ------------ 294,820 Pioneer Value Fund Class Y 5,377,525 ------------ TOTAL INVESTMENTS IN SECURITIES - 100.7% (Cost $126,072,376) (a) $136,192,713 OTHER ASSETS AND LIABILITIES - (0.7%) (904,965) ------------ TOTAL NET ASSETS - 100.0% $135,287,748 ============ (a) At July 31, 2006, the net unrealized gain on investments based on cost for federal tax purposes of $127,373,772 was as follows: Aggregate gross unrealized gain for all investments in which there is an excess of value over tax cost $10,107,713 Aggregate gross unrealized loss for all investments in which there is an excess of tax cost over value (1,288,772) ----------- Net unrealized gain $8,818,941 =========== Purchases and sales of securities (excluding temporary cash investments) for the period ended July 31, 2006 aggregated $101,640,759 and $52,847,443, respectively. 42 The accompanying notes are an integral part of these financial statements. Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- STATEMENTS OF ASSETS AND LIABILITIES 7/31/06 - -------------------------------------------------------------------------------- Conservative Moderate Growth Aggressive Allocation Allocation Allocation Allocation Fund Fund Fund Fund ASSETS: Investments in securities of affiliated issuers, at value (at cost $14,962,317, $240,107,624, $203,463,394 and $126,072,376, respectively) $14,947,517 $251,324,148 $214,390,413 $136,192,713 Cash 2,087,875 12,553,105 - 265,075 Receivables for: Investment Funds sold - 65,532 - - Capital stock sold 58,480 675,705 676,448 162,580 Due from Pioneer Investment Management, Inc. - 10,233 22,464 - Other assets 32,203 46,745 44,061 45,592 ----------- ------------ ------------ ------------ Total assets $17,126,075 $264,675,468 $215,133,386 $136,665,960 ----------- ------------ ------------ ------------ LIABILITIES: Payables for: Due to Custodian $ - $ - $ 130,788 $ - Funds purchased 87,798 232,069 342,606 798,783 Capital stock redeemed 60,897 390,789 468,580 332,230 Due to affiliates 40,504 175,427 182,712 106,898 Accrued expenses and other liabilities 58,697 121,638 91,834 140,301 ----------- ------------ ------------ ------------ Total liabilities $ 247,896 $ 919,923 $ 1,216,520 $ 1,378,212 ----------- ------------ ------------ ------------ NET ASSETS: Paid-in capital $16,717,748 $251,570,599 $200,952,608 $127,146,301 Accumulated undistributed net investment income 149,065 2,083,330 672,433 75,141 Accumulated net realized gain (loss) on investments 26,166 (1,114,908) 1,364,806 (2,054,031) Net unrealized gain (loss) on investments (14,800) 11,216,524 10,927,019 10,120,337 ----------- ------------ ------------ ------------ Total net assets $16,878,179 $263,755,545 $213,916,866 $135,287,748 =========== ============ ============ ============ NET ASSET VALUE PER SHARE: (No par value, unlimited number of shares authorized) Net Assets of Class A Shares $ 8,837,096 $148,495,044 $116,161,350 $ 84,775,156 Net Assets of Class B shares $ 2,829,870 $ 55,052,604 $ 61,373,047 $ 30,381,739 Net Assets of Class C shares $ 5,201,227 $ 32,415,508 $ 33,314,794 $ 15,523,823 Net Assets of Class Y shares $ 9,986 $ 27,792,389 $ 3,067,675 $ 4,607,030 =========== ============ ============ ============ Class A Shares outstanding 837,183 13,039,680 9,648,206 6,842,719 Class B Shares outstanding 270,995 5,040,999 5,617,589 2,565,553 Class C Shares outstanding 498,386 2,987,109 2,878,099 1,293,208 Class Y Shares outstanding 945 2,430,778 252,860 371,296 =========== ============ ============ ============ Net Asset Value - Class A Share $ 10.56 $ 11.39 $ 12.04 $ 12.39 Net Asset Value - Class B Share $ 10.44 $ 10.92 $ 10.93 $ 11.84 Net Asset Value - Class C Share $ 10.44 $ 10.85 $ 11.58 $ 12.00 Net Asset Value - Class Y Share $ 10.57 $ 11.43 $ 12.13 $ 12.41 =========== ============ ============ ============ MAXIMUM OFFERING PRICE: Class A (100 [divided by] 94.25 x net asset value per share) $ 11.20 $ 12.08 $ 12.77 $ 13.15 =========== ============ ============ ============ The accompanying notes are an integral part of these financial statements. 43 Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- STATEMENTS OF OPERATIONS - -------------------------------------------------------------------------------- For the Year Ended 7/31/06 Conservative Moderate Growth Aggressive Allocation Allocation Allocation Allocation Fund Fund Fund Fund INVESTMENT INCOME: Dividend income from securities of affiliated issuers $ 242,661 $ 4,122,869 $2,398,032 $ 953,880 Interest 41,985 415,999 10,572 5,153 ---------- ------------ ---------- ---------- Total investment income $ 284,646 $ 4,538,868 $2,408,604 $ 959,033 ---------- ------------ ---------- ---------- EXPENSES: Management fees $ 11,708 $ 291,037 $ 210,884 $ 133,858 Transfer agent fees Class A 5,949 114,236 173,895 138,987 Class B 3,963 106,473 156,636 84,773 Class C 2,556 32,110 41,626 23,759 Class Y 32 4,900 1,841 2,850 Distribution fees Class A 11,445 298,560 213,727 148,675 Class B 15,998 451,366 471,666 239,890 Class C 26,134 245,331 245,704 114,977 Administrative fees 2,586 26,472 19,769 12,453 Custodian fees 19,368 98,353 77,530 50,503 Registration fees 39,582 85,654 64,642 50,721 Professional fees 56,674 48,653 51,519 50,547 Printing fees 18,070 53,384 26,174 39,789 Fees and expenses of nonaffiliated trustees 6,042 12,839 8,263 7,650 Insurance expense 850 4,842 4,230 3,368 Miscellaneous 3,229 2,729 2,310 2,307 ---------- ------------ ---------- ---------- Total expenses $ 224,186 $ 1,876,939 $1,770,416 $1,105,107 Less management fees waived and expenses reimbursed by Pioneer Investment Management, Inc. $ (116,034) - $ (21,585) $ (12,001) ---------- ------------ ---------- ---------- Net expenses $ 108,152 $ 1,876,939 $1,748,831 $1,093,106 ---------- ------------ ---------- ---------- Net investment income (loss) $ 176,494 $ 2,661,929 $ 659,773 $ (134,073) ---------- ------------ --------- ---------- REALIZED AND UNREALIZED GAIN (LOSS) ON INVESTMENTS: Net realized gain (loss) on investments $ (40,955) $ 4,746,124 $ 946,934 $2,029,517 Realized gain distributions from invest- ment company shares 82,391 4,712,908 3,688,966 2,801,486 Change in net unrealized gain (loss) on investments (36,031) (1,460,980) 3,158,797 1,495,849 ---------- ------------ ---------- ---------- Net gain on investments 5,405 7,998,052 7,794,697 6,326,852 ---------- ------------ ---------- ---------- Net increase in net assets resulting from operations $ 181,899 $ 10,659,981 $8,454,470 $6,192,779 ========== ============ ========== ========== 44 The accompanying notes are an integral part of these financial statements. Pioneer Ibbotson Asset Allocation Series - ------------------------------------------------------------------------------- STATEMENTS OF CHANGES IN NET ASSETS - -------------------------------------------------------------------------------- Conservative Allocation Fund Moderate Allocation Fund ------------------------------- -------------------------------- Year 5/12/05* Year 8/9/04* Ended to Ended to 7/31/06 7/31/05 7/31/06 7/31/05 FROM OPERATIONS: Net investment income $ 176,494 $ 4,206 $ 2,661,929 $ 237,724 Net realized gain on investments 41,436 401 9,459,032 301,790 Change in net unrealized gain (loss) on investments (36,031) 21,231 (1,460,980) 2,207,763 ----------- ---------- ------------- ------------ Net increase in net assets resulting from operations $ 181,899 $ 25,838 $ 10,659,981 $ 2,747,277 ----------- ---------- ------------- ------------ DISTRIBUTIONS TO SHAREOWNERS: Net investment income Class A $ (22,489) - $ (695,194) $ (45,923) Class B (9,129) - (142,133) - Class C (10,659) - (31,961) (4,387) Class Y (6) - (334,603) - Net realized gain on investments Class A (3,055) - (2,636,349) (248,071) Class B (1,240) - (1,086,431) (58,542) Class C (1,448) - (524,670) (93,285) Class Y (1) - (1,057,414) - Return of capital Class A - - - - Class B - - - - Class C - - - - Class Y - - - - ----------- ---------- ------------- ------------ Total distributions to shareowners $ (48,027) - $ (6,508,755) $ (450,208) ----------- ---------- ------------- ------------ FROM FUND SHARE TRANSACTIONS: Net proceeds from sale of shares $17,709,197 $1,451,162 $ 113,368,592 $ 59,474,035 Reinvestment of distributions 35,314 - 5,879,935 294,903 Cost of shares repurchased (2,777,184) (20) (73,049,619) (4,214,373) Shares issued in reorganization - - 155,508,777 - ----------- ---------- ------------- ------------ Net increase in net assets resulting from fund share transactions $14,967,327 $1,451,142 $ 201,707,685 $ 55,554,565 ----------- ---------- ------------- ------------ Net increase in net assets $15,101,199 $1,476,980 $ 205,858,911 $ 57,851,634 NET ASSETS: Beginning of period $ 1,776,980 $ 300,000 $ 57,896,634 $ 45,000 ----------- ---------- ------------- ------------ End of year $16,878,179 $1,776,980 $ 263,755,545 $ 57,896,634 =========== ========== ============= ============ Undistributed net investment income, end of year $ 149,065 $ 4,801 $ 2,083,330 $ 159,804 =========== ========== ============= ============ * Commencement of operations The accompanying notes are an integral part of these financial statements. 45 Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- STATEMENTS OF CHANGES IN NET ASSETS (continued) - -------------------------------------------------------------------------------- Growth Allocation Fund Aggressive Allocation Fund ---------------------------------- ---------------------------------- Year 8/9/04* Year 8/9/04* Ended to Ended to 7/31/06 7/31/05 7/31/06 7/31/05 FROM OPERATIONS: Net investment income (loss) $ 659,773 $ 85,313 $ (134,073) $ (21,217) Net realized gain on investments 4,635,900 311,611 4,831,003 195,632 Change in net unrealized gain on investments 3,158,797 2,659,540 1,495,849 1,805,652 ------------ ----------- ------------ ------------ Net increase in net assets resulting from operations $ 8,454,470 $ 3,056,464 $ 6,192,779 $ 1,980,067 ------------ ----------- ------------ ------------ DISTRIBUTIONS TO SHAREOWNERS: Net investment income Class A $ (345,018) $ (22,438) $ (73,792) - Class B (82,794) - - Class C - (2,600) - - Class Y (39,851) - (25,479) - Net realized gain on investments Class A (902,786) (163,365) (1,223,951) (92,234) Class B (577,319) (62,965) (567,882) (37,320) Class C (261,229) (88,675) (231,664) (47,257) Class Y (80,074) - (243,638) - Return of capital Class A - - - (16,797) Class B - - (3,788) Class C - - - (4,796) Class Y - - - - ------------ ----------- ------------ ----------- Total distributions to shareowners $ (2,289,071) $ (340,043) $ (2,366,406) $ (202,192) ------------ ----------- ------------ ----------- FROM FUND SHARE TRANSACTIONS: Net proceeds from sale of shares $118,122,801 $56,458,098 $ 75,239,813 $33,604,731 Reinvestment of distributions 2,099,209 285,838 2,169,818 168,962 Cost of shares repurchased (36,958,781) (3,200,971) (30,943,807) (1,917,566) Shares issued in reorganization 68,183,852 - 51,316,549 - ------------ ----------- ------------ ----------- Net increase in net assets resulting from fund share transactions $151,447,081 $53,542,965 $ 97,782,373 $31,856,127 ------------ ----------- ------------ ----------- Net increase in net assets $157,612,480 $56,259,386 $101,608,746 $33,634,002 NET ASSETS: Beginning of period 56,304,386 45,000 33,679,002 45,000 ------------ ----------- ------------ ----------- End of year $213,916,866 $56,304,386 $135,287,748 $33,679,002 ============ =========== ============ =========== Undistributed net investment income, end of year $ 672,433 $ 61,295 $ 75,141 $ - ============ =========== ============ =========== * Commencement of operations 46 The accompanying notes are an integral part of these financial statements. Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- For the Year Ended 7/31/06 and Period Ended 7/31/05 Conservative Allocation Fund ------------------------------------------------------------------------ '06 Shares '06 Amount '05 Shares '05 Amount CLASS A Shares sold 898,359 $9,400,261 75,252 $763,192 Reinvestment of distributions 2,031 21,079 - - Less shares repurchased (148,457) (1,557,446) (2) (20) -------- ---------- ------ -------- Net increase 751,933 $7,863,894 75,250 $763,172 ======== ========== ====== ======== CLASS B Shares sold 286,529 $2,974,458 11,447 $116,425 Reinvestment of distributions 835 8,620 - - Less shares repurchased (37,816) (393,152) - - -------- ---------- ------ -------- Net increase 249,548 $2,589,926 11,447 $116,425 ======== ========== ====== ======== CLASS C Shares sold 510,972 $5,324,478 56,247 $571,545 Reinvestment of distributions 544 5,615 - - Less shares repurchased (79,377) (826,586) - - -------- ---------- ------- -------- Net increase 432,139 $4,503,507 56,247 $571,545 ======== ========== ====== ======== CLASS Y* Shares sold 945 $ 10,000 Reinvestment of distributions - - Less shares repurchased - - -------- ---------- Net increase 945 $ 10,000 ======== ========== Moderate Allocation Fund ------------------------------------------------------------------------ '06 Shares '06 Amount '05 Shares '05 Amount CLASS A Shares sold 6,405,638 $ 72,857,111 3,174,114 $ 33,967,502 Reinvestment of distributions 269,424 3,009,471 17,263 185,747 Less shares repurchased (2,680,612) (30,546,449) (243,218) (2,627,215) Shares issued in reorganization 6,095,571 68,142,545 - - ---------- ------------- --------- ------------ Net increase 10,090,021 $ 113,462,678 2,948,159 $ 31,526,034 ========== ============= ========= ============ CLASS B Shares sold 1,605,785 $ 17,587,651 956,645 $ 9,913,133 Reinvestment of distributions 105,082 1,131,732 5,162 53,946 Less shares repurchased (664,314) (7,283,351) (55,357) (574,934) Shares issued in reorganization 3,086,496 33,269,915 - - ---------- ------------- --------- ------------ Net increase 4,133,049 $ 44,705,947 906,450 $ 9,392,145 ========== ============= ========= ============ CLASS C Shares sold 1,923,525 $ 20,933,219 1,516,928 $ 15,593,400 Reinvestment of distributions 33,895 362,338 5,329 55,210 Less shares repurchased (395,765) (4,288,391) (98,303) (1,012,224) ---------- ------------- --------- ------------ Net increase 1,561,655 $ 17,007,166 1,423,954 $ 14,636,386 ========== ============= ========= ============ CLASS Y** Shares sold 174,727 $ 1,990,611 Reinvestment of distributions 123,333 1,376,394 Less shares repurchased (2,706,254) (30,931,428) Shares issued in reorganization 4,838,972 54,096,317 ---------- ------------- Net increase 2,430,778 $ 26,531,894 ========== ============= * Fund commenced operation on 10/5/05 ** Fund commenced operation on 9/23/05 The accompanying notes are an integral part of these financial statements. 47 Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- STATEMENTS OF CHANGES IN NET ASSETS (continued) - -------------------------------------------------------------------------------- Moderate Allocation Fund ------------------------------------------------------------------------ '06 Shares '06 Amount '05 Shares '05 Amount CLASS A Shares sold 5,798,720 $ 69,197,676 2,872,133 $ 31,415,731 Reinvestment of distributions 99,749 1,172,050 15,346 168,809 Less shares repurchased (1,538,171) (18,428,645) (173,828) (1,918,265) Shares issued in reorganization 2,572,757 29,688,353 - - ---------- ------------- --------- ------------ Net increase 6,933,055 $ 81,629,434 2,713,651 $ 29,666,275 ========== ============= ========= ============ CLASS B Shares sold 2,420,842 $ 26,412,340 1,032,426 $ 10,360,090 Reinvestment of distributions 59,006 631,954 5,558 56,193 Less shares repurchased (750,314) (8,164,423) (66,702) (673,461) Shares issued in reorganization 2,915,273 30,697,135 - - ---------- ------------- --------- ------------ Net increase 4,644,807 $ 49,577,006 971,282 $ 9,742,822 ========== ============= ========= ============ CLASS C Shares sold 1,909,199 $ 21,909,801 1,389,335 $ 14,682,277 Reinvestment of distributions 17,009 192,886 5,702 60,836 Less shares repurchased (387,946) (4,507,506) (56,700) (609,245) ---------- ------------- --------- ------------ Net increase 1,538,262 $ 17,595,181 1,338,337 $ 14,133,868 ========== ============= ========= ============ CLASS Y* Shares sold 51,290 $ 602,984 Reinvestment of distributions 8,708 102,319 Less shares repurchased (482,918) (5,858,207) Shares issued in reorganization 675,780 7,798,364 ---------- ------------- Net increase 252,860 $ 2,645,460 ========== ============= Aggressive Allocation Fund ------------------------------------------------------------------------ '06 Shares '06 Amount '05 Shares '05 Amount CLASS A Shares sold 4,278,800 $ 52,739,788 1,830,200 $ 20,539,993 Reinvestment of distributions 100,587 1,213,082 8,741 98,166 Less shares repurchased (1,049,894) (12,946,732) (90,484) (1,020,697) Shares issued in reorganization 1,763,269 20,930,973 - - ---------- ------------- --------- ------------ Net increase 5,092,762 $ 61,937,111 1,748,457 $ 19,617,462 ========== ============= ========= ============ CLASS B Shares sold 958,460 $ 11,426,790 537,702 $ 5,801,097 Reinvestment of distributions 44,921 520,186 3,181 34,579 Less shares repurchased (311,556) (3,687,072) (29,240) (316,350) Shares issued in reorganization 1,360,585 15,538,420 - - ---------- ------------- --------- ------------ Net increase 2,052,410 $ 23,798,324 511,643 $ 5,519,326 ========== ============= ========= ============ CLASS C Shares sold 838,226 $ 10,065,538 667,003 $ 7,263,641 Reinvestment of distributions 14,339 168,202 3,286 36,217 Less shares repurchased (178,514) (2,148,569) (52,632) (580,519) ---------- ------------- --------- ------------ Net increase 674,051 $ 8,085,171 617,657 $ 6,719,339 ========== ============= ========= ============ CLASS Y* Shares sold 84,627 $ 1,007,697 Reinvestment of distributions 22,288 268,348 Less shares repurchased (986,399) (12,161,434) Shares issued in reorganization 1,250,780 14,847,156 ---------- ------------- Net increase 371,296 $ 3,961,767 ========== ============= * Fund commenced operation on 10/5/05 48 The accompanying notes are an integral part of these financial statements. Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- FINANCIAL HIGHLIGHTS - -------------------------------------------------------------------------------- Conservative Allocation Fund Year 5/12/05 (a) Ended To 7/31/06 7/31/05 CLASS A Net asset value, beginning of period $ 10.29 $ 10.00 ------- --------- Increase from investment operations: Net investment income (b) $ 0.25 $ 0.05 Net realized and unrealized gain on investments 0.09 0.24 ------- --------- Net increase from investment operations $ 0.34 $ 0.29 ------- --------- Distributions to shareowners: Net investment income $ (0.06) $ - Net realized gain (0.01) - ------- --------- Net increase in net asset value $ 0.27 $ 0.29 ------- --------- Net asset value, end of period $ 10.56 $ 10.29 ======= ========= Total return* 3.33% 2.90%*** Ratio of net expenses to average net assets+ 0.78% 0.78%** Ratio of net investment income to average net assets 2.38% 2.26%** Portfolio turnover rate 15% 9%** Net assets, end of period (in thousands) $ 8,837 $ 877 Ratios with no waivers of management fees and assumption of expenses by PIM and no reduction for fees paid indirectly: Net expenses 2.12% 40.41%** Net investment income (loss) 1.04% (37.37)%** (a) Commencement of operations. (b) Calculated using average shares outstanding for the period. * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period, and no sales charges. Total return would be reduced if sales charges were taken into account. ** Annualized. + In addition to the expenses which the Fund bears directly, the Fund indirectly bears pro rata shares of the expenses of the funds in which the Fund invests. Because each of the underlying funds bears its own varying expense levels and because the Fund may own differing proportions of each fund at different times, the amount of expenses incurred indirectly by the Fund will vary from time to time. *** Not Annualized. The accompanying notes are an integral part of these financial statements. 49 Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------- FINANCIAL HIGHLIGHTS Conservative Allocation Fund Year 5/12/05 (a) Ended To 7/31/06 7/31/05 CLASS B Net asset value, beginning of period $ 10.28 $ 10.00 ------- --------- Increase from investment operations: Net investment income (b) $ 0.15 $ 0.03 Net realized and unrealized gain on investments 0.08 0.25 ------- --------- Net increase from investment operations $ 0.23 $ 0.28 ------- --------- Distributions to shareowners: Net investment income $ (0.06) $ - Net realized gain (0.01) - ------- --------- Net increase in net asset value $ 0.16 $ 0.28 ------- --------- Net asset value, end of period $ 10.44 $ 10.28 ======= ========= Total return* 2.26% 2.80%*** Ratio of net expenses to average net assets+ 1.68% 1.68%** Ratio of net investment income to average net assets 1.49% 1.23%** Portfolio turnover rate 15% 9%** Net assets, end of period (in thousands) $ 2,830 $ 221 Ratios with no waivers of management fees and assumption of expenses by PIM and no reduction for fees paid indirectly: Net expenses 3.08% 38.96%** Net investment income (loss) 0.09% (36.05)%** (a) Commencement of operations. (b) Calculated using average shares outstanding for the period. * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period, and no sales charges. Total return would be reduced if sales charges were taken into account. ** Annualized. + In addition to the expenses which the Fund bears directly, the Fund indirectly bears pro rata shares of the expenses of the funds in which the Fund invests. Because each of the underlying funds bears its own varying expense levels and because the Fund may own differing proportions of each fund at different times, the amount of expenses incurred indirectly by the Fund will vary from time to time. *** Not Annualized. 50 The accompanying notes are an integral part of these financial statements. Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- FINANCIAL HIGHLIGHTS - -------------------------------------------------------------------------------- Conservative Allocation Fund Year 5/12/05 (a) Ended To 7/31/06 7/31/05 CLASS C Net asset value, beginning of period $ 10.26 $ 10.00 ------- --------- Increase from investment operations: Net investment income (b) $ 0.15 $ 0.03 Net realized and unrealized gain on investments 0.10 0.23 ------- --------- Net increase from investment operations $ 0.25 $ 0.26 ------- --------- Distributions to shareowners: Net investment income $ (0.06) $ - Net realized gain (0.01) - ------- --------- Net increase in net asset value $ 0.18 $ 0.26 ------- --------- Net asset value, end of period $ 10.44 $ 10.26 ======= ========= Total return* 2.46% 2.60%*** Ratio of net expenses to average net assets+ 1.68% 1.68%** Ratio of net investment income to average net assets 1.48% 1.17%** Portfolio turnover rate 15% 9%** Net assets, end of period (in thousands) $ 5,201 $ 679 Ratios with no waivers of management fees and assumption of expenses by PIM and no reduction for fees paid indirectly: Net expenses 2.80% 45.38%** Net investment income (loss) 0.36% (42.53)%** (a) Commencement of operations. (b) Calculated using average shares outstanding for the period. * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period, and no sales charges. Total return would be reduced if sales charges were taken into account. ** Annualized. + In addition to the expenses which the Fund bears directly, the Fund indirectly bears pro rata shares of the expenses of the funds in which the Fund invests. Because each of the underlying funds bears its own varying expense levels and because the Fund may own differing proportions of each fund at different times, the amount of expenses incurred indirectly by the Fund will vary from time to time. *** Not Annualized. The accompanying notes are an integral part of these financial statements. 51 Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- FINANCIAL HIGHLIGHTS - -------------------------------------------------------------------------------- Conservative Allocation Fund 10/5/05 (a) To 7/31/06 CLASS Y Net asset value, beginning of period $ 10.32 ------- Increase from investment operations: Net investment income (b) $ 0.16 Net realized and unrealized gain on investments 0.16 ------- Net increase from investment operations $ 0.32 ------- Distributions to shareowners: Net investment income $ (0.06) Net realized gain (0.01) ------- Net increase in net asset value $ 0.25 ------- Net asset value, end of period $ 10.57 ======= Total return* 3.13%*** Ratio of net expenses to average net assets+ 1.23%** Ratio of net investment income to average net assets 1.96%** Portfolio turnover rate 15% Net assets, end of period (in thousands) $ 10 Ratios with no waivers of management fees and assumption of expenses by PIM and no reduction for fees paid indirectly: Net expenses 2.19%** Net investment income 0.98%** (a) Commencement of operations. (b) Calculated using average shares outstanding for the period. * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period, and no sales charges. Total return would be reduced if sales charges were taken into account. ** Annualized. + In addition to the expenses which the Fund bears directly, the Fund indirectly bears pro rata shares of the expenses of the funds in which the Fund invests. Because each of the underlying funds bears its own varying expense levels and because the Fund may own differing proportions of each fund at different times, the amount of expenses incurred indirectly by the Fund will vary from time to time. *** Not Annualized. 52 The accompanying notes are an integral part of these financial statements. Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------- FINANCIAL HIGHLIGHTS Moderate Allocation Fund Year 8/9/04 (a) Ended To 7/31/06 7/31/05 CLASS A Net asset value, beginning of period $ 11.15 $ 10.00 -------- -------- Increase from investment operations: Net investment income (b) $ 0.16 $ 0.15 Net realized and unrealized gain on investments 0.38 1.27 -------- -------- Net increase from investment operations $ 0.54 $ 1.42 -------- -------- Distributions to shareowners: Net investment income $ (0.06) $ (0.04) Net realized gain (0.24) (0.23) -------- -------- Net increase in net asset value $ 0.24 $ 1.15 -------- -------- Net asset value, end of period $ 11.39 $ 11.15 ======== ======== Total return* 4.98% 14.37%*** Ratio of net expenses to average net assets+ 0.63% 0.77%** Ratio of net investment income to average net assets 1.40% 1.37%** Portfolio turnover rate 52% 19%** Net assets, end of period (in thousands) $148,495 $ 32,893 Ratios with no waivers of management fees and assumption of expenses by PIM and no reduction for fees paid indirectly: Net expenses 0.63% 1.26%** Net investment income 1.40% 0.88%** (a) Commencement of operations. (b) Calculated using average shares outstanding for the period. * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period, and no sales charges. Total return would be reduced if sales charges were taken into account. ** Annualized. + In addition to the expenses which the Fund bears directly, the Fund indirectly bears pro rata shares of the expenses of the funds in which the Fund invests. Because each of the underlying funds bears its own varying expense levels and because the Fund may own differing proportions of each fund at different times, the amount of expenses incurred indirectly by the Fund will vary from time to time. *** Not Annualized. The accompanying notes are an integral part of these financial statements. 53 Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- FINANCIAL HIGHLIGHTS - -------------------------------------------------------------------------------- Moderate Allocation Fund Year 8/9/04 (a) Ended To 7/31/06 7/31/05 CLASS B Net asset value, beginning of period $ 10.77 $ 10.00 ------- -------- Increase from investment operations: Net investment income (b) $ 0.06 $ 0.02 Net realized and unrealized gain on investments 0.36 0.98 ------- -------- Net increase from investment operations $ 0.42 $ 1.00 ------- -------- Distributions to shareowners: Net investment income $ (0.03) $ - Net realized gain (0.24) (0.23) ------- -------- Net increase in net asset value $ 0.15 $ 0.77 ------- -------- Net asset value, end of period $ 10.92 $ 10.77 ======= ======== Total return* 4.00% 10.11%*** Ratio of net expenses to average net assets+ 1.51% 1.67%** Ratio of net investment income to average net assets 0.51% 0.16%** Portfolio turnover rate 52% 19%** Net assets, end of period (in thousands) $55,053 $ 9,781 Ratios with no waivers of management fees and assumption of expenses by PIM and no reduction for fees paid indirectly: Net expenses 1.51% 2.08%** Net investment income (loss) 0.51% (0.25)%** (a) Commencement of operations. (b) Calculated using average shares outstanding for the period. * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period, and no sales charges. Total return would be reduced if sales charges were taken into account. ** Annualized. + In addition to the expenses which the Fund bears directly, the Fund indirectly bears pro rata shares of the expenses of the funds in which the Fund invests. Because each of the underlying funds bears its own varying expense levels and because the Fund may own differing proportions of each fund at different times, the amount of expenses incurred indirectly by the Fund will vary from time to time. *** Not Annualized. 54 The accompanying notes are an integral part of these financial statements. Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- FINANCIAL HIGHLIGHTS - -------------------------------------------------------------------------------- Moderate Allocation Fund Year 8/9/04 (a) Ended To 7/31/06 7/31/05 CLASS C Net asset value, beginning of period $ 10.68 $ 10.00 ------- ------- Increase from investment operations: Net investment income (b) $ 0.07 $ 0.05 Net realized and unrealized gain on investments 0.35 0.87 ------- ------- Net increase from investment operations $ 0.42 $ 0.92 ------- ------- Distributions to shareowners: Net investment income $ (0.01) $ (0.01) Net realized gain (0.24) (0.23) ------- ------- Net increase in net asset value $ 0.17 $ 0.68 ------- ------- Net asset value, end of period $ 10.85 $ 10.68 ======= ======== Total return* 4.06% 9.32%*** Ratio of net expenses to average net assets+ 1.42% 1.67%** Ratio of net investment income to average net assets 0.60% 0.44%** Portfolio turnover rate 52% 19%** Net assets, end of period (in thousands) $32,416 $15,223 Ratios with no waivers of management fees and assumption of expenses by PIM and no reduction for fees paid indirectly: Net expenses 1.42% 2.03%** Net investment income 0.60% 0.08%** (a) Commencement of operations. (b) Calculated using average shares outstanding for the period. * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period, and no sales charges. Total return would be reduced if sales charges were taken into account. ** Annualized. + In addition to the expenses which the Fund bears directly, the Fund indirectly bears pro rata shares of the expenses of the funds in which the Fund invests. Because each of the underlying funds bears its own varying expense levels and because the Fund may own differing proportions of each fund at different times, the amount of expenses incurred indirectly by the Fund will vary from time to time. *** Not Annualized. The accompanying notes are an integral part of these financial statements. 55 Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- FINANCIAL HIGHLIGHTS Moderate Allocation Fund 9/23/05 (a) To 7/31/06 CLASS Y Net asset value, beginning of period $ 11.18 ------- Increase from investment operations: Net investment income (b) $ 0.17 Net realized and unrealized gain on investments 0.40 ------- Net increase from investment operations $ 0.57 ------- Distributions to shareowners: Net investment income $ (0.08) Net realized gain (0.24) ------- Net increase in net asset value $ 0.25 ------- Net asset value, end of period $ 11.43 ======= Total return* 5.19%*** Ratio of net expenses to average net assets+ 0.28%** Ratio of net investment income to average net assets 1.79%** Portfolio turnover rate 52%** Net assets, end of period (in thousands) $27,792 Ratios with no waivers of management fees and assumption of expenses by PIM and no reduction for fees paid indirectly: Net expenses 0.28%** Net investment income 1.79%** (a) Commencement of operations. (b) Calculated using average shares outstanding for the period. * 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. Total returns for periods less than one year are not annualized. ** Annualized. + In addition to the expenses which the Fund bears directly, the Fund indirectly bears pro rata shares of the expenses of the funds in which the Fund invests. Because each of the underlying funds bears its own varying expense levels and because the Fund may own differing proportions of each fund at different times, the amount of expenses incurred indirectly by the Fund will vary from time to time. *** Not Annualized. 56 The accompanying notes are an integral part of these financial statements. Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- FINANCIAL HIGHLIGHTS - -------------------------------------------------------------------------------- Growth Allocation Fund Year 8/9/04 (a) Ended To 7/31/06 7/31/05 CLASS A Net asset value, beginning of period $ 11.50 $ 10.00 -------- -------- Increase from investment operations: Net investment income (b) $ 0.09 $ 0.08 Net realized and unrealized gain on investments 0.63 1.70 -------- -------- Net increase from investment operations $ 0.72 $ 1.78 -------- -------- Distributions to shareowners: Net investment income $ (0.05) $ (0.03) Net realized gain (0.13) (0.25) -------- -------- Net increase in net asset value $ 0.54 $ 1.50 -------- -------- Net asset value, end of period $ 12.04 $ 11.50 ======== ======== Total return* 6.29% 17.96%*** Ratio of net expenses to average net assets+ 0.74% 0.81%** Ratio of net investment income to average net assets 0.74% 0.69%** Portfolio turnover rate 27% 2%** Net assets, end of period (in thousands) $116,161 $ 31,212 Ratios with no waivers of management fees and assumption of expenses by PIM and no reduction for fees paid indirectly: Net expenses 0.74% 1.42%** Net investment income 0.74% 0.08%** (a) Commencement of operations. (b) Calculated using average shares outstanding for the period. * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period, and no sales charges. Total return would be reduced if sales charges were taken into account. ** Annualized. + In addition to the expenses which the Fund bears directly, the Fund indirectly bears pro rata shares of the expenses of the funds in which the Fund invests. Because each of the underlying funds bears its own varying expense levels and because the Fund may own differing proportions of each fund at different times, the amount of expenses incurred indirectly by the Fund will vary from time to time. *** Not Annualized. The accompanying notes are an integral part of these financial statements. 57 Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- FINANCIAL HIGHLIGHTS - -------------------------------------------------------------------------------- Growth Allocation Fund Year 8/9/04 (a) Ended To 7/31/06 7/31/05 CLASS B Net asset value, beginning of period $ 10.50 $ 10.00 ------- -------- Increase from investment operations: Net investment income (loss) (b) $ (0.01) $ 0.01 Net realized and unrealized gain on investments 0.59 0.74 ------- -------- Net increase from investment operations $ 0.58 $ 0.75 ------- -------- Distributions to shareowners: Net investment income $ (0.02) $ - Net realized gain (0.13) (0.25) ------- -------- Net increase in net asset value $ 0.43 $ 0.50 ------- -------- Net asset value, end of period $ 10.93 $ 10.50 ======= ======== Total return* 5.53% 7.59%*** Ratio of net expenses to average net assets+ 1.52% 1.71%** Ratio of net investment income to average net assets (0.04)% 0.05%** Portfolio turnover rate 27% 2% Net assets, end of period (in thousands) $61,373 $ 10,219 Ratios with no waivers of management fees and assumption of expenses by PIM and no reduction for fees paid indirectly: Net expenses 1.57% 2.27%** Net investment income (loss) (0.08)% (0.51)%** (a) Commencement of operations. (b) Calculated using average shares outstanding for the period. * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period, and no sales charges. Total return would be reduced if sales charges were taken into account. ** Annualized. + In addition to the expenses which the Fund bears directly, the Fund indirectly bears pro rata shares of the expenses of the funds in which the Fund invests. Because each of the underlying funds bears its own varying expense levels and because the Fund may own differing proportions of each fund at different times, the amount of expenses incurred indirectly by the Fund will vary from time to time. *** Not Annualized. 58 The accompanying notes are an integral part of these financial statements. Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- FINANCIAL HIGHLIGHTS - -------------------------------------------------------------------------------- Growth Allocation Fund Year 8/9/04 (a) Ended To 7/31/06 7/31/05 CLASS C Net asset value, beginning of period $ 11.10 $ 10.00 ------- -------- Increase from investment operations: Net investment income (loss) (b) $ - $ (0.01) Net realized and unrealized gain on investments 0.61 1.37 ------- -------- Net increase from investment operations $ 0.61 $ 1.36 ------- -------- Distributions to shareowners: Net investment income $ - $ (0.01) Net realized gain (0.13) (0.25) ------- -------- Net increase in net asset value $ 0.48 $ 1.10 ------- -------- Net asset value, end of period $ 11.58 $ 11.10 ======= ======== Total return* 5.51% 13.67%*** Ratio of net expenses to average net assets+ 1.46% 1.71%** Ratio of net investment income (loss) to average net assets** 0.02% (0.07)%** Portfolio turnover rate*** 27% 2%** Net assets, end of period (in thousands) $33,315 $ 14,874 Ratios with no waivers of management fees and assumption of expenses by PIM and no reduction for fees paid indirectly: Net expenses 1.46% 2.13%** Net investment income (loss) 0.02% (0.49)%** (a) Commencement of operations. (b) Calculated using average shares outstanding for the period. * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period, and no sales charges. Total return would be reduced if sales charges were taken into account. ** Annualized. + In addition to the expenses which the Fund bears directly, the Fund indirectly bears pro rata shares of the expenses of the funds in which the Fund invests. Because each of the underlying funds bears its own varying expense levels and because the Fund may own differing proportions of each fund at different times, the amount of expenses incurred indirectly by the Fund will vary from time to time. *** Not Annualized. The accompanying notes are an integral part of these financial statements. 59 Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- FINANCIAL HIGHLIGHTS - -------------------------------------------------------------------------------- Growth Allocation Fund 9/23/05 (a) To 7/31/06 CLASS Y Net asset value, beginning of period $ 11.54 ------- Increase from investment operations: Net investment income (b) $ 0.13 Net realized and unrealized gain on investments 0.65 ------- Net increase from investment operations $ 0.78 ------- Distributions to shareowners: Net investment income $ (0.06) Net realized gain (0.13) ------- Net increase in net asset value $ 0.59 ------- Net asset value, end of period $ 12.13 ======= Total return* 6.84%*** Ratio of net expenses to average net assets+ 0.32%** Ratio of net investment income to average net assets 1.23%** Portfolio turnover rate 27%** Net assets, end of period (in thousands) $ 3,068 Ratios with no waivers of management fees and assumption of expenses by PIM and no reduction for fees paid indirectly: Net expenses 0.32%** Net investment income 1.23%** (a) Commencement of operations. (b) Calculated using average shares outstanding for the period. * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period, and no sales charges. Total return would be reduced if sales charges were taken into account. ** Annualized. + In addition to the expenses which the Fund bears directly, the Fund indirectly bears pro rata shares of the expenses of the funds in which the Fund invests. Because each of the underlying funds bears its own varying expense levels and because the Fund may own differing proportions of each fund at different times, the amount of expenses incurred indirectly by the Fund will vary from time to time. *** Not Annualized. 60 The accompanying notes are an integral part of these financial statements. Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- FINANCIAL HIGHLIGHTS - -------------------------------------------------------------------------------- Aggressive Allocation Fund Year 8/9/04 (a) Ended To 7/31/06 7/31/05 CLASS A Net asset value, beginning of period $ 11.82 $ 10.00 ------- -------- Increase from investment operations: Net investment income (b) $ 0.01 $ - Net realized and unrealized gain on investments 0.85 2.14 ------- -------- Net increase from investment operations $ 0.86 $ 2.14 ------- -------- Distributions to shareowners: Net investment income $ (0.02) $ - Net realized gain (0.27) (0.27) Return of capital - (0.05) ------- -------- Net increase in net asset value $ 0.57 $ 1.82 ------- -------- Net asset value, end of period $ 12.39 $ 11.82 ======= ======== Total return* 7.30% 21.57%*** Ratio of net expenses to average net assets+ 0.82% 0.86%** Ratio of net investment income (loss) to average net assets 0.10% (0.04%)** Portfolio turnover rate 51% 3%** Net assets, end of period (in thousands) $84,775 $ 20,689 Ratios with no waivers of management fees and assumption of expenses by PIM and no reduction for fees paid indirectly: Net expenses 0.82% 2.14%** Net investment income (loss) 0.10% (1.31%)** (a) Commencement of operations. (b) Calculated using average shares outstanding for the period. * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period, and no sales charges. Total return would be reduced if sales charges were taken into account. ** Annualized. + In addition to the expenses which the Fund bears directly, the Fund indirectly bears pro rata shares of the expenses of the funds in which the Fund invests. Because each of the underlying funds bears its own varying expense levels and because the Fund may own differing proportions of each fund at different times, the amount of expenses incurred indirectly by the Fund will vary from time to time. *** Not Annualized. The accompanying notes are an integral part of these financial statements. 61 Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- FINANCIAL HIGHLIGHTS - -------------------------------------------------------------------------------- Aggressive Allocation Fund Year 8/9/04 (a) Ended To 7/31/06 7/31/05 CLASS B Net asset value, beginning of period $ 11.39 $ 10.00 ------- -------- Increase from investment operations: Net investment (loss) (b) $ (0.08) $ (0.03) Net realized and unrealized gain on investments 0.80 1.72 ------- -------- Net increase from investment operations $ 0.72 $ 1.69 ------- -------- Distributions to shareowners: Net investment income - - Net realized gain $ (0.27) $ (0.27) Return of capital - (0.03) ------- -------- Net increase in net asset value $ 0.45 $ 1.39 ------- -------- Net asset value, end of period $ 11.84 $ 11.39 ======= ======== Total return* 6.36% 17.02%*** Ratio of net expenses to average net assets+ 1.64% 1.76%** Ratio of net investment (loss) to average net assets (0.70)% (0.26)%** Portfolio turnover rate 51% 3% Net assets, end of period (in thousands) $30,382 $ 5,845 Ratios with no waivers of management fees and assumption of expenses by PIM and no reduction for fees paid indirectly: Net expenses 1.69% 2.81%** Net investment (loss) (0.75)% (1.31)%** (a) Commencement of operations. (b) Calculated using average shares outstanding for the period. * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period, and no sales charges. Total return would be reduced if sales charges were taken into account. ** Annualized. + In addition to the expenses which the Fund bears directly, the Fund indirectly bears pro rata shares of the expenses of the funds in which the Fund invests. Because each of the underlying funds bears its own varying expense levels and because the Fund may own differing proportions of each fund at different times, the amount of expenses incurred indirectly by the Fund will vary from time to time. *** Not Annualized. 62 The accompanying notes are an integral part of these financial statements. Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- FINANCIAL HIGHLIGHTS - -------------------------------------------------------------------------------- Aggressive Allocation Fund Year 8/9/04 (a) Ended To 7/31/06 7/31/05 CLASS C Net asset value, beginning of period $ 11.54 $ 10.00 ------- -------- Increase from investment operations: Net investment (loss) (b) $ (0.08) $ (0.04) Net realized and unrealized gain on investments 0.81 1.88 ------- -------- Net increase from investment operations $ 0.73 $ 1.84 ------- -------- Distributions to shareowners: Net investment income $ - $ - Net realized gain (0.27) (0.27) Return of capital - (0.03) ------- -------- Net increase in net asset value $ 0.46 $ 1.54 ------- -------- Net asset value, end of period $ 12.00 $ 11.54 ======= ======== Total return* 6.37% 18.52%*** Ratio of net expenses to average net assets+ 1.56% 1.76%** Ratio of net investment (loss) to average net assets (0.64)% (0.39)%** Portfolio turnover rate 51% 3%** Net assets, end of period (in thousands) $15,524 $ 7,144 Ratios with no waivers of management fees and assumption of expenses by PIM and no reduction for fees paid indirectly: Net expenses 1.56% 2.74%** Net investment (loss) (0.64)% (1.37)%** (a) Commencement of operations. (b) Calculated using average shares outstanding for the period. * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period, and no sales charges. Total return would be reduced if sales charges were taken into account. ** Annualized. + In addition to the expenses which the Fund bears directly, the Fund indirectly bears pro rata shares of the expenses of the funds in which the Fund invests. Because each of the underlying funds bears its own varying expense levels and because the Fund may own differing proportions of each fund at different times, the amount of expenses incurred indirectly by the Fund will vary from time to time. *** Not Annualized. The accompanying notes are an integral part of these financial statements. 63 Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- FINANCIAL HIGHLIGHTS - -------------------------------------------------------------------------------- Aggressive Allocation Fund 9/23/05 (a) To 7/31/06 CLASS Y Net asset value, beginning of period $ 11.87 ------- Increase from investment operations: Net investment income (b) $ 0.06 ------- Net realized and unrealized gain on investments 0.78 ------- Net increase from investment operations $ 0.84 ------- Distributions to shareowners: Net investment income $ (0.03) Net realized gain (0.27) ------- Net increase in net asset value $ 0.54 ------- Net asset value, end of period $ 12.41 ======= Total return* 7.13%*** Ratio of net expenses to average net assets+ 0.37%** Ratio of net investment income to average net assets 0.63%** Portfolio turnover rate 51%** Net assets, end of period (in thousands) $ 4,607 Ratios with no waivers of management fees and assumption of expenses by PIM and no reduction for fees paid indirectly: Net expenses 0.37%** Net investment income 0.63%** (a) Commencement of operations. (b) Calculated using average shares outstanding for the period. * Assumes initial investment at net asset value at the beginning of each period, reinvestment of all distributions, the complete redemption of the investment at net asset value at the end of each period, and no sales charges. Total return would be reduced if sales charges were taken into account. ** Annualized. + In addition to the expenses which the Fund bears directly, the Fund indirectly bears pro rata shares of the expenses of the funds in which the Fund invests. Because each of the underlying funds bears its own varying expense levels and because the Fund may own differing proportions of each fund at different times, the amount of expenses incurred indirectly by the Fund will vary from time to time. *** Not Annualized. 64 The accompanying notes are an integral part of these financial statements. Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- NOTES TO FINANCIAL STATEMENTS 7/31/06 - -------------------------------------------------------------------------------- 1. Organization and Significant Accounting Policies Pioneer Ibbotson Asset Allocation Series (the Trust) was organized as a Delaware statutory trust on April 22, 2004 (amended July 1, 2004) and was registered with the Securities and Exchange Commission under the Investment Company Act of 1940 (the 1940 Act) as an open-end management investment company. The Trust consists of four separate funds, each issuing four classes of shares (collectively, the Funds, individually, the Fund) as follows: Pioneer Ibbotson Conservative Allocation Fund (Conservative Fund) Pioneer Ibbotson Moderate Allocation Fund (Moderate Fund) Pioneer Ibbotson Growth Allocation Fund (Growth Fund) Pioneer Ibbotson Aggressive Allocation Fund (Aggressive Fund) The investment objective of the Conservative Fund is to seek long-term capital growth and current income. The Moderate Fund seeks long-term capital growth and current income. The Growth Fund seeks long-term capital growth and current income. The Aggressive Fund seeks long-term capital growth. Each Fund is a "fund of funds," which means that it seeks to achieve its investment objective by investing exclusively in other Pioneer Investment funds ("underlying funds") managed by Pioneer Investment Management, Inc. (PIM) rather than direct investment in securities. In the future, the Funds also may invest in regulated investment companies (Third Party Managed Assets) that are not managed by PIM. The Funds indirectly pay a portion of the expenses incurred by the underlying funds. Consequently, an investment in the Funds entails more direct and indirect expenses than direct investment in the underlying funds. Each Fund offers four classes of shares designated Class A, Class B, Class C and Class Y. 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 distribution fees and have exclusive voting rights with respect to the distribution plans that have been adopted by Class A, Class B and Class C shareowners, respectively. The financial statements have been prepared in accordance with United States generally accepted accounting principles that require the management of the Fund to make estimates and assumptions 65 Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- NOTES TO FINANCIAL STATEMENTS 7/31/06 (continued) - -------------------------------------------------------------------------------- that affect the reported amounts of assets and liabilities at the date of the financial statements and the reported amounts of income and expenses during the reporting period. Actual results could differ from these estimates. The following is a summary of significant accounting policies consistently followed by the Trust in the preparation of its financial statements, which are in conformity with those generally accepted in the investment company industry. A. Security Valuation Security transactions are recorded as of the trade date. The net asset value is computed once daily, on each day the New York Stock Exchange (NYSE) is open, as of the close of regular trading on the NYSE. In computing the net asset value, holdings of mutual fund shares are valued at the net asset value of each fund. Dividend income is recorded on the ex-dividend date. Temporary cash investments are valued at amortized cost. 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 Funds' policy to comply with the requirements of the Internal Revenue Service Code applicable to regulated investment companies and to distribute all taxable income and net realized capital gains, if any, to shareholders. Therefore, no Federal income tax provisions are required. The amount and characterization of distributions to shareowners for financial reporting purposes is determined in accordance with federal income tax rules. Therefore, the source of the Funds' 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. The Pioneer Ibbotson Aggressive Allocation Fund had a net capital loss carryforward of $1,622,949, which will expire in 2011 if not utilized. 66 Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- At July 31, 2006, the Funds made reclassifications as listed below. These reclassifications have no impact on the net asset values of the respective Funds and are designed to present the Funds' capital accounts on a tax basis. Undistributed Accumulated Net Investment Realized Gain/ Paid-In Portfolio Income (Loss) (Loss) Capital - ------------------------------------------------------------------------------------------ Conservative Allocation Fund $10,052 $ (9,926) $ (126) Moderate Allocation Fund 465,488 (5,201,426) 4,735,938 Growth Allocation Fund 419,028 (1,446,656) 1,027,628 Aggressive Allocation Fund 308,485 (4,616,245) 4,307,760 The tax character of distributions paid during the year ended July 31, 2006 was as follows: Ordinary Long-Term Return of Fund Income Capital Gains Capital Total - --------------------------------------------------------------------------------------- Conservative Fund $ 42,282 $ 5,745 - $ 48,027 Moderate Fund 1,203,891 5,304,864 - 6,508,755 Growth Fund 467,663 1,821,408 - 2,289,071 Aggressive Fund 99,271 2,267,135 - 2,366,406 The tax character of distributions paid during the period ended July 31, 2005 was as follows: Ordinary Long-Term Return of Fund Income Capital Gains Capital Total - ---------------------------------------------------------------------------------- Conservative Fund - - - - Moderate Fund $115,810 $334,398 - $450,208 Growth Fund $ 55,896 $284,147 - $340,043 Aggressive Fund $ 1,317 $175,494 $25,381 $202,192 The following shows the components of distributable earnings on a federal income tax basis at July 31, 2006: Undistributed Undistributed Net Unrealized Ordinary Long-Term Appreciation Fund Income Capital Gains (Depreciation) - ------------------------------------------------------------------------------- Conservative Fund $ 149,065 $ 54,123 $ (42,757) Moderate Fund 2,083,330 1,198,296 8,903,320 Growth Fund 672,433 2,078,431 10,213,394 Aggressive Fund 75,141 870,314 8,818,941 67 Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- NOTES TO FINANCIAL STATEMENTS 7/31/06 (continued) - -------------------------------------------------------------------------------- The difference between book-basis and tax-basis unrealized appreciation is attributable to the tax deferral of losses on wash sales. C. Fund Shares The Board of Trustees has authorized the issuance of four classes of shares, designated as Class A, Class B, Class C and Class Y. Additional classes of shares have been authorized but are not referenced in the Fund's prospectus. For the Conservative Allocation Fund, Class A, Class B and Class C shares were offered for sale to the public on May 12, 2005. Class Y shares were offered for sale to the public on October 5, 2005. For the Moderate Allocation, Growth Allocation and Aggressive Allocation Funds, Class A, Class B and Class C shares were offered for sale to the public on August 9, 2004. Class Y shares of the Funds were first publicly offered on the following dates: Moderate Allocation on 9/26/05, Growth Allocation on 9/26/05 and Aggressive Allocation on 9/26/05. Shares of each class represent an interest in the same portfolio of investments of the Fund and have equal rights as to voting, redemptions, dividends and liquidation, except that the level of transfer agent and distribution fees may differ among classes. Class A, Class B, and Class C shareowners have exclusive voting rights with respect to distribution plans for each class. There is no distribution plan for Class Y. The Funds record sales and repurchases of Fund shares as of trade date. Pioneer Funds Distributor, Inc. (PFD), the principal underwriter for the Funds and a wholly owned indirect subsidiary of UniCredito Italiano S.p.A. (UniCredito Italiano), earned the following in underwriting commissions during the year ended July 31, 2006: Fund Amount - ------------------------------------- Conservative Fund $ 26,958 Moderate Fund $154,264 Growth Fund $241,185 Aggressive Fund $151,210 D. Class Allocations Distribution fees are calculated based on the average daily net asset value attributable to Class A, Class B and Class C shares of each Fund, respectively, (see Note 4). Share owners of each class share all expenses and fees paid to the transfer agent, Pioneer Investment Management Shareholder Services, Inc. (PIMSS), for its services, 68 Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- 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. Distributions to shareowners are recorded as of the ex-dividend date. Distributions paid by each of the Funds with respect to each class of shares are calculated in the same manner, at the same time, and in the same amount, except that Class A, Class B and Class C shares can bear different transfer agent and distribution fees. E. Repurchase Agreements With respect to repurchase agreements entered into by the Funds, the value of the underlying securities (collateral), including accrued interest received from counterparties, is required to be at least equal to or in excess of the value of the repurchase agreement at the time of the purchase. The collateral for all repurchase agreements is held in safekeeping in the customer-only account of the Funds' custodian, or subcustodians. The Fund's investment adviser, PIM is responsible for determining that the value of the collateral remains at least equal to the repurchase price. 2. Management Agreement PIM, a wholly owned indirect subsidiary of UniCredito Italiano, is the Funds' investment adviser, and manages the Funds' portfolios. Management fees are calculated daily at the following annual rates on Pioneer managed assets: Management Fee as a Percentage of each Fund's Average Fund Daily Net Assets - ---- ------------------------------ Conservative Fund 0.13% Moderate Fund 0.13% Growth Fund 0.13% Aggressive Fund 0.13% For each Fund, management fees will be calculated daily at a 0.17% annual rate on any Third Party managed assets. 69 Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- NOTES TO FINANCIAL STATEMENTS 7/31/06 (continued) - -------------------------------------------------------------------------------- PIM has entered into a sub-advisory agreement with Ibbotson Associates, LLC. PIM, not the Funds, pays a portion of the fee it receives from each Fund to Ibbotson Associates as compensation for its services to the Funds. In addition, under the management and administration agreements, certain other services and costs, including accounting, regulatory reporting and insurance premiums, are paid by the Funds. At July 31, 2006, the following fees were payable to PIM relating to management fees and certain other services and are included in due to affiliates: Fund Amount - ---- ------ Conservative Fund $30,447 Moderate Fund $56,463 Growth Fund $43,739 Aggressive Fund $33,409 From August 1, 2005 through August 31, 2005, PIM did not impose all or a portion of its management fees and assumed other operating expenses of the Funds to the extent necessary to limit Class A, Class B and Class C expenses to the following annual expense limitations: Fund Class A Class B Class C - -------------------------------------------------------------------------------- Conservative Fund .78% 1.68% 1.68% Moderate Fund .74% 1.64% 1.64% Growth Fund .79% 1.69% 1.69% Aggressive Fund .85% 1.75% 1.75% Effective September 1, 2005, PIM has further agreed to not impose all or a portion of its management fees and assume other operating expenses of the Funds to the extent necessary to limit Class A, Class B and Class C expenses to the following annual expense limitations: Fund Class A Class B Class C - -------------------------------------------------------------------------------- Conservative Fund .78% 1.68% 1.68% Moderate Fund .74% 1.52% 1.52% Growth Fund .79% 1.57% 1.57% Aggressive Fund .85% 1.64% 1.64% 70 Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- 3. Transfer Agent PIMSS provides substantially all transfer agent and shareowner services to the Funds at negotiated rates. Included in due to affiliates are the following amounts of transfer agent fees payable to PIMSS at July 31, 2006: Fund Amount - ---- ------ Conservative Fund $ 1,274 Moderate Fund $12,445 Growth Fund $34,442 Aggressive Fund $15,631 4. Distribution and Service Plans The Funds have adopted Plans of Distribution with respect to Class A, Class B and Class C shares (Class A Plan, Class B Plan and Class C Plan, respectively) in accordance with Rule 12b-1 of the Investment Company Act of 1940. Pursuant to the Class A Plan, the Funds pay PFD a service fee of up to 0.25% of the Fund's 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 Funds pay 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 paid as compensation for personal services and/or account maintenance services or distribution services with regard to Class B and Class C shares. At July 31, 2006 the following fees were payable to PFD relating to distribution and service fees and are included in due to affiliates: Fund Amount - ---- ------ Conservative Fund $ 8,783 Moderate Fund $106,519 Growth Fund $104,531 Aggressive Fund $ 57,858 71 Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- NOTES TO FINANCIAL STATEMENTS 7/31/06 (continued) - -------------------------------------------------------------------------------- In addition, redemptions of each class of 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 one year of purchase. Class B shares that are redeemed within five years of purchase will be subject to a CDSC at declining rates beginning at 4.00%, based on the lower of cost or market value of shares being redeemed. Redemptions of Class C shares within one year of purchase are subject to a CDSC of 1.00%. For the year ended July 31, 2006, the following CDSC's were paid to PFD: Fund Amount - ---- ------ Conservative Fund $ 6,829 Moderate Fund $139,244 Growth Fund $152,049 Aggressive Fund $ 80,172 5. Merger Information On September 22, 2005, the beneficial owners of certain AmSouth Funds approved a proposed merger agreement and Plan of Reorganization that provided for the mergers listed below. These tax-free reorganizations were accomplished on September 26, 2005 by exchanging all of the AmSouth Fund's net assets for shares of the applicable Pioneer Ibbotson Fund, based upon the Fund's Class A, Class B and Class Y shares' ending net asset values, respectively. The following charts show the details of the reorganizations as of that closing date ("Closing Date"): 72 Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Pioneer AmSouth AmSouth Pioneer Moderate Growth and Moderate Growth Moderate Allocation Fund Income Fund and Income Fund Allocation Fund (Pre-Reorganization) (Pre-Reorganization) (Pre-Reorganization) (Post-Reorganization) - -------------------------------------------------------------------------------------------------------------------------- Net Assets Class A $40,918,497 $ 47,985,562 $20,156,983 $109,061,042 Class B $11,519,608 $ 19,432,527 $13,837,388 $ 44,789,524 Class C $17,124,590 $ 17,124,590 Class Y $ 54,096,317 Class I $ 40,453,115 $13,643,202 Total Net Assets $69,562,695 $107,871,204 $47,637,573 $225,071,473 Shares Outstanding Class A 3,660,813 4,708,295 2,060,226 9,756,384 Class B 1,068,504 1,914,637 1,423,053 4,155,001 Class C 1,602,231 1,602,231 Class Y 4,838,972 Class I 3,953,925 1,390,285 Shares Issued in Reorganization Class A 6,095,571 Class B 3,086,496 Class Y 4,838,972 Unrealized Appreciation Accumulated Gain On Closing On Closing Date Date - -------------------------------------------------------------------------------- AmSouth Growth and Income Fund $8,743,400 $2,595,540 AmSouth Moderate Growth and Income Fund $1,726,341 $ 851,251 73 Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- NOTES TO FINANCIAL STATEMENTS 7/31/06 (continued) Pioneer Growth AmSouth Pioneer Growth Allocation Fund Growth Fund Allocation Fund (Pre-Reorganization) (Pre-Reorganization) (Post-Reorganization) - -------------------------------------------------------------------------------------------------------------------------- Net Assets Class A $38,438,637 $29,688,353 $ 68,126,990 Class B $12,106,330 $30,697,135 $ 42,803,465 Class C $16,868,540 $ 16,868,540 Class Y $ 7,798,364 Class I $ 7,798,364 Total Net Assets $67,413,507 $68,183,852 $135,597,359 Shares Outstanding Class A 3,332,335 3,007,670 5,905,091 Class B 1,149,798 3,155,064 4,065,072 Class C 1,516,287 1,516,287 Class Y 675,780 Class I 786,487 Shares Issued in Reorganization Class A 2,572,757 Class B 2,915,273 Class Y 675,780 Unrealized Appreciation Accumulated Gain On Closing On Closing Date Date - -------------------------------------------------------------------------------- AmSouth Growth Fund $5,108,682 $1,905,046 74 Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Pioneer Aggressive AmSouth Aggressive Pioneer Aggressive Allocation Fund Growth Fund Allocation Fund (Pre-Reorganization) (Pre-Reorganization) (Post-Reorganization) - --------------------------------------------------------------------------------------------------------------------------- Net Assets Class A $25,582,418 $20,930,973 $46,513,391 Class B $ 7,003,626 $15,538,420 $22,542,046 Class C $ 8,276,330 $ 8,276,330 Class Y $14,847,156 Class I $14,847,156 Total Net Assets $40,862,374 $51,316,549 $92,178,923 Shares Outstanding Class A 2,154,549 2,128,158 3,917,819 Class B 613,143 1,653,405 1,973,727 Class C 715,365 715,365 Class Y 1,250,780 Class I 1,509,339 Shares Issued in Reorganization Class A 1,763,269 Class B 1,360,585 Class Y 1,250,780 Unrealized Appreciation Accumulated Gain On Closing On Closing Date Date - -------------------------------------------------------------------------------- AmSouth Aggressive Growth Fund $6,818,836 $1,802,796 75 Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- NOTES TO FINANCIAL STATEMENTS 7/31/06 (continued) - -------------------------------------------------------------------------------- ADDITIONAL INFORMATION (unaudited) For the fiscal year ended July 31, 2006, certain dividends paid by the Funds may be subject to a maximum tax rate of 15%, as provided for by the Jobs and Growth Tax Relief Reconciliation Act (the Act) of 2003. The Funds designated up to the maximum amount of such dividends allowable under the Act, as taxed at a maximum rate of 15%. Complete information was computed and reported in conjunction with your 2005 Form 1099-DIV. The qualifying percentage of ordinary income dividends for the purposes of the corporate dividends received deduction was: Moderate Fund 20.29% Growth Fund 47.65% Aggressive Fund 100.00% Conservative Fund 7.80% 76 Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM - -------------------------------------------------------------------------------- To the Board of Trustees and Shareowners of Pioneer Ibbotson Asset Allocation Series: We have audited the accompanying statements of assets and liabilities, including the schedules of investments, of Pioneer Ibbotson Asset Allocation Series (the "Funds", comprising, respectively, the Pioneer Ibbotson Conservative Allocation Fund, the Pioneer Ibbotson Moderate Allocation Fund, the Pioneer Ibbotson Growth Allocation Fund and the Pioneer Ibbotson Aggressive Allocation Fund) as of July 31, 2006, and the related statements of operations for the year then ended, and the statements of changes in net assets and financial highlights for each of the periods indicated therein. These financial statements and financial highlights are the responsibility of the Funds' management. Our responsibility is to express an opinion on these financial statements and financial highlights based on our audits. We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements and financial highlights are free of material misstatement. We were not engaged to perform an audit of the Funds' internal control over financial reporting. Our audits included consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Funds' internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements and financial highlights, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. Our procedures included confirmation of securities owned as of July 31, 2006, by correspondence with the Funds' custodian and the transfer agent of the underlying funds. 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 each of the respective Funds constituting the Pioneer Ibbotson Asset Allocation Series at July 31, 2006, the results of their operations, the changes in their net assets and the financial highlights for each of the periods then ended, in conformity with U.S. generally accepted accounting principles. /s/Ernest & Young LLP Boston, Massachusetts September 15, 2006 77 Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- TRUSTEES, OFFICERS AND SERVICE PROVIDERS - -------------------------------------------------------------------------------- Investment Adviser Pioneer Investment Management, Inc. Investment Subadviser Ibbotson Associates Advisors, LLC 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 may serve as a trustee of each of the 91 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. 78 Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- INTERESTED TRUSTEES - -------------------------------------------------------------------------------- Positions Held Length of Service Name and Age With the Fund and Term of Office John F. Cogan, Jr. (80)* Chairman of the Trustee since 2004. Board, Trustee Serves until successor and President trustee is elected or earlier retirement or removal. Other Directorships Held Name and Age Principal Occupation During Past Five Years by this Trustee John F. Cogan, Jr. (80)* Deputy Chairman and a Director of Pioneer Global Asset Chairman (until Management S.p.A. ("PGAM"); Non-Executive Chairman June 2006) and Director and a Director of Pioneer Investment Management USA of ICI Mutual Insurance Inc. ("PIM-USA"); Chairman and a Director of Pioneer; Company; Director Chairman and Director of Pioneer Institutional Asset of Harbor Management, Inc. (since 2006), Director of Pioneer Global Company, Ltd. 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. - ------------------------------------------------------------------------------------------------------------------------------------ - -------------------------------------------------------------------------------- INDEPENDENT TRUSTEES - -------------------------------------------------------------------------------- David R. Bock (62)** Trustee Trustee since 2005. 3050 K. Street NW, Serves until successor Washington, DC 20007 trustee is elected or earlier retirement or removal. David R. Bock (62)** Senior Vice President and Chief Financial Officer, I-trax, Director of The Enterprise 3050 K. Street NW, Inc. (publicly traded health care services company) Social Investment Company Washington, DC 20007 (2001 - present); Managing Partner, Federal City (privately-held affordable Capital Advisors (boutique merchant bank) (2002 housing finance company); to 2004); Executive Vice President and Chief Financial Director of New York Officer, Pedestal Inc. (internet-based mortgage trading Mortgage Trust (publicly company) (2000 - 2002). traded mortgage REIT) **Mr. Bock became a Trustee of the Fund on January 1, 2005. - ------------------------------------------------------------------------------------------------------------------------------------ 79 Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- INDEPENDENT TRUSTEES - -------------------------------------------------------------------------------- Positions Held Length of Service Name and Age With the Fund and Term of Office Mary K. Bush (58) Trustee Trustee since 2004. 3509 Woodbine Street, Serves until successor Chevy Chase, MD 20815 trustee is elected or earlier retirement or removal. - -------------------------------------------------------------------------------- Margaret B.W. Graham (59) Trustee Trustee since 2004. 1001 Sherbrooke Street West, Serves until successor Montreal, Quebec, Canada trustee is elected or H3A 1G5 earlier retirement or removal. - -------------------------------------------------------------------------------- Thomas J. Perna (55) Trustee Trustee since February 89 Robbins Avenue, 2006. Serves until Berkeley Heights, NJ 07922 successor trustee is elected or earlier retirement or removal. - -------------------------------------------------------------------------------- Marguerite A. Piret (58) Trustee Trustee since One Boston Place, 28th Floor, 2004.Serves until Boston, MA 02108 successor trustee is elected or earlier retirement or removal. - -------------------------------------------------------------------------------- Other Directorships Held Name and Age Principal Occupation During Past Five Years by this Trustee Mary K. Bush (58) President, Bush International (international financial Director of Brady 3509 Woodbine Street, advisory firm). Corporation (industrial Chevy Chase, MD 20815 identification and specialty coated material products manufacturer), Director of Briggs & Stratton Co. (engine manufacturer) Director of Mortgage Guaranty Insurance Corporation, and Director of UAL Corporation (airline holding company) - ------------------------------------------------------------------------------------------------------------------------------------ Margaret B.W. Graham (59) Founding Director, The Winthrop Group, Inc. None 1001 Sherbrooke Street West, (consulting firm); Desautels, Faculty of Management, Montreal, Quebec, Canada McGill University. H3A 1G5 - ------------------------------------------------------------------------------------------------------------------------------------ Thomas J. Perna (55) Private investor (2004 - present); Senior Executive Director of Quadriserv Inc. 89 Robbins Avenue, Vice President, The Bank of New York (financial and (technology products for Berkeley Heights, NJ 07922 securities services) (1986 - 2004). securities lending industry) - ------------------------------------------------------------------------------------------------------------------------------------ Marguerite A. Piret (58) President and Chief Executive Officer, Newbury, Piret & Director of New America One Boston Place, 28th Floor, Company, Inc. (investment banking firm). High Income Fund, Inc. Boston, MA 02108 (closed-end investment company) - ------------------------------------------------------------------------------------------------------------------------------------ 80 Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Positions Held Length of Service Name and Age With the Fund and Term of Office John Winthrop (70) Trustee Trustee since One North Adgers Wharf, 2004.Serves until Charleston, SC 29401 successor trustee is elected or earlier retirement or removal. - -------------------------------------------------------------------------------- Other Directorships Held Name and Age Principal Occupation During Past Five Years by this Trustee John Winthrop (70) President, John Winthrop & Co., Inc. None One North Adgers Wharf, (private investment firm). Charleston, SC 29401 - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- FUND OFFICERS - -------------------------------------------------------------------------------- Osbert M. Hood (53)** Executive Vice Trustee since 2004. President Serves at the discretion of Board. - -------------------------------------------------------------------------------- Dorothy E. Bourassa (58) Secretary Since 2004. Serves at the discretion of Board. - -------------------------------------------------------------------------------- Osbert M. Hood (53)** President and Chief Executive Officer, PIM-USA since Trustee of certain May 2003 (Director since January 2001; Executive Vice Pioneer Funds. 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 of PIM-USA; Senior Vice President - Legal None of Pioneer; and Secretary/Clerk of most of PIM-USA's subsidiaries; Secretary of all of the Pioneer Funds since September 2003 (Assistant Secretary from November 2000 to September 2003). - ------------------------------------------------------------------------------------------------------------------------------------ 81 Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- FUND OFFICERS - -------------------------------------------------------------------------------- Positions Held Length of Service Name and Age With the Fund and Term of Office Christopher J. Kelley (41) Assistant Secretary Since 2004. Serves at the discretion of Board. - -------------------------------------------------------------------------------- Christopher P. Harvey (45) Assistant Secretary Since 2006. Serves at the discretion of Board. - -------------------------------------------------------------------------------- Vincent Nave (61) Treasurer Since 2004. Serves at the discretion of Board. - -------------------------------------------------------------------------------- Mark E. Bradley (46) Assistant Treasurer Since 2004. Serves at the discretion of Board. - -------------------------------------------------------------------------------- Luis I. Presutti (41) Assistant Treasurer Since 2004. Serves at the discretion of Board. - -------------------------------------------------------------------------------- Gary Sullivan (48) Assistant Treasurer Since 2004. Serves at the discretion of Board. - -------------------------------------------------------------------------------- Other Directorships Held Name and Age Principal Occupation During Past Five Years by this Trustee Christopher J. Kelley (41) Vice President and Senior Counsel of Pioneer since None July 2002; Vice President and Senior Counsel of BISYS Fund Services, Inc. (April 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. - ------------------------------------------------------------------------------------------------------------------------------------ Christopher P. Harvey (45) Partner, Wilmer Cutler Pickering Hale and Dorr LLP; and None Assistant Secretary of all Pioneer Funds since July 2006. - ------------------------------------------------------------------------------------------------------------------------------------ Vincent Nave (61) Vice President - Fund Accounting, Administration None and Controllership Services of Pioneer; and Treasurer of all of the Pioneer Funds. - ------------------------------------------------------------------------------------------------------------------------------------ Mark E. Bradley (46) Deputy Treasurer of Pioneer since 2004; Treasurer None - ------------------------------------------------------------------------------------------------------------------------------------ and Senior Vice President, CDC IXIS Asset 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 Vice President - Fund Accounting, None Administration and Controllership Services of Pioneer; and Assistant Treasurer of all of the Pioneer Funds. - ------------------------------------------------------------------------------------------------------------------------------------ Gary Sullivan (48) Fund Accounting Manager - Fund Accounting, None Administration and Controllership Services of Pioneer; and Assistant Treasurer of all of the Pioneer Funds since May 2002. - ------------------------------------------------------------------------------------------------------------------------------------ 82 Pioneer Ibbotson Asset Allocation Series - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- Positions Held Length of Service Name and Age With the Fund and Term of Office Katherine Kim Sullivan (32) Assistant Treasurer Since 2004. Serves at the discretion of Board. - ------------------------------------------------------------------------------------------------ Terrence J. Cullen (45) Chief Compliance Since 2006. Officer Serves at the discretion of Board. - ------------------------------------------------------------------------------------------------ Other Directorships Held Name and Age Principal Occupation During Past Five Years by this Trustee Katherine Kim Sullivan (32) Fund administration Manager - Fund Accounting, None Administration and Controllership Services since June 2003; 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 Controllership Services (Fund Accounting Manager from August 1999 to May 2002) and Assistant Treasurer of all Pioneer Funds since September 2003. - ------------------------------------------------------------------------------------------------------------------------------------ Terrence J. Cullen (45) Chief Compliance Officer of Pioneer and Pioneer None Funds since March 2006; Vice President and Senior Counsel 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. 83 - -------------------------------------------------------------------------------- - -------------------------------------------------------------------------------- This page for your notes. 84 - -------------------------------------------------------------------------------- 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 FactFoneSM 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 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 website: www.pioneerinvestments.com Please consider the Fund's investment objectives, risks, charges and expenses carefully before investing. The prospectus contains this and other information about the Fund and should be read carefully before you invest. To obtain a prospectus and for other information on any Pioneer fund, call 1-800-225-6292 or visit our website www.pioneerfunds.com. 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 sec.gov. The filed form may also be viewed and copied at the Commission's Public Reference Room in Washington, DC. Information regarding the operations of the Public Reference Room may be obtained by calling 1-800-SEC-0330. ITEM 2. CODE OF ETHICS. (a) Disclose whether, as of the end of the period covered by the report, the registrant has adopted a code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party. If the registrant has not adopted such a code of ethics, explain why it has not done so. The registrant has adopted, as of the end of the period covered by this report, a code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer and controller. (b) For purposes of this Item, the term "code of ethics" means written standards that are reasonably designed to deter wrongdoing and to promote: (1) Honest and ethical conduct, including the ethical handling of actual or apparent conflicts of interest between personal and professional relationships; (2) Full, fair, accurate, timely, and understandable disclosure in reports and documents that a registrant files with, or submits to, the Commission and in other public communications made by the registrant; (3) Compliance with applicable governmental laws, rules, and regulations; (4) The prompt internal reporting of violations of the code to an appropriate person or persons identified in the code; and (5) Accountability for adherence to the code. (c) The registrant must briefly describe the nature of any amendment, during the period covered by the report, to a provision of its code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party, and that relates to any element of the code of ethics definition enumerated in paragraph (b) of this Item. The registrant must file a copy of any such amendment as an exhibit pursuant to Item 10(a), unless the registrant has elected to satisfy paragraph (f) of this Item by posting its code of ethics on its website pursuant to paragraph (f)(2) of this Item, or by undertaking to provide its code of ethics to any person without charge, upon request, pursuant to paragraph (f)(3) of this Item. The registrant has made no amendments to the code of ethics during the period covered by this report. (d) If the registrant has, during the period covered by the report, granted a waiver, including an implicit waiver, from a provision of the code of ethics to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party, that relates to one or more of the items set forth in paragraph (b) of this Item, the registrant must briefly describe the nature of the waiver, the name of the person to whom the waiver was granted, and the date of the waiver. Not applicable. (e) If the registrant intends to satisfy the disclosure requirement under paragraph (c) or (d) of this Item regarding an amendment to, or a waiver from, a provision of its code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions and that relates to any element of the code of ethics definition enumerated in paragraph (b) of this Item by posting such information on its Internet website, disclose the registrant's Internet address and such intention. Not applicable. (f) The registrant must: (1) File with the Commission, pursuant to Item 10(a), a copy of its code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, as an exhibit to its annual report on this Form N-CSR; (2) Post the text of such code of ethics on its Internet website and disclose, in its most recent report on this Form N-CSR, its Internet address and the fact that it has posted such code of ethics on its Internet website; or (3) Undertake in its most recent report on this Form N-CSR to provide to any person without charge, upon request, a copy of such code of ethics and explain the manner in which such request may be made. 	See Item 10(2) ITEM 3. AUDIT COMMITTEE FINANCIAL EXPERT. (a) (1) Disclose that the registrant's board of trustees has determined that the registrant either: (i) Has at least one audit committee financial expert serving on its audit committee; or (ii) Does not have an audit committee financial expert serving on its audit committee. The registrant's Board of Trustees has determined that the registrant has at least one audit committee financial expert. (2) If the registrant provides the disclosure required by paragraph (a)(1)(i) of this Item, it must disclose the name of the audit committee financial expert and whether that person is "independent." In order to be considered "independent" for purposes of this Item, a member of an audit committee may not, other than in his or her capacity as a member of the audit committee, the board of trustees, or any other board committee: (i) Accept directly or indirectly any consulting, advisory, or other compensatory fee from the issuer; or (ii) Be an "interested person" of the investment company as defined in Section 2(a)(19) of the Act (15 U.S.C. 80a-2(a)(19)). Ms. Marguerite A. Piret, an independent trustee, is such an audit committee financial expert. (3) If the registrant provides the disclosure required by paragraph (a)(1) (ii) of this Item, it must explain why it does not have an audit committee financial expert. Not applicable. ITEM 4. PRINCIPAL ACCOUNTANT FEES AND SERVICES. (a) Disclose, under the caption AUDIT FEES, the aggregate fees billed for each of the last two fiscal years for professional services rendered by the principal accountant for the audit of the registrant's annual financial statements or services that are normally provided by the accountant in connection with statutory and regulatory filings or engagements for those fiscal years. Audit Fees Fees for audit services provided to the Series, including fees associated with the filings of its Form N-1A, totaled approximately $132,940 in 2006 and approximately $132,000 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 $28,560 in 2006 and $27,200 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 July 31, 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. Non-Audit Services Beginning with non-audit service contracts entered into on or after May 6, 2003, the effective date of the new SEC pre- approval rules, the Fund's audit committee is required to pre-approve services to affiliates defined by SEC rules to the extent that the services are determined to have a direct impact on the operations or financial reporting of the Fund. For the years ended July 31, 2006 and 2005, there were no services provided to an affiliate that required the Fund's audit committee pre-approval. (f) If greater than 50 percent, disclose the percentage of hours expended on the principal accountant's engagement to audit the registrant's financial statements for the most recent fiscal year that were attributed to work performed by persons other than the principal accountant's full-time, permanent employees. N/A (g) Disclose the aggregate non-audit fees billed by the registrant's accountant for services rendered to the registrant, and rendered to the registrant's investment adviser (not including any sub-adviser whose role is primarily portfolio management and is subcontracted with or overseen by another investment adviser), and any entity controlling, controlled by, or under common control with the adviser that provides ongoing services to the registrant for each of the last two fiscal years of the registrant. The aggregate non-audit fees for the Fund and affiliates, as previously defined, totaled approximately $28,560 in 2006 and $27,200 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. The Fund's audit committee of the Board of Trustees has considered whether the provision of non-audit services that were rendered to the Affiliates (as defined) that were not pre- approved pursuant to paragraph (c)(7)(ii) of Rule 2-01 of Regulation S-X is compatible with maintaining the principal accountant's independence. Item 5. Audit Committee of Listed Registrants (a) If the registrant is a listed issuer as defined in Rule 10A-3 under the Exchange Act (17 CFR 240.10A-3), state whether or not the registrant has a separately-designated standing audit committee established in accordance with Section 3(a)(58)(A) of the Exchange Act (15 U.S.C. 78c(a)(58)(A)). If the registrant has such a committee, however designated, identify each committee member. If the entire board of directors is acting as the registrants audit committee as specified in Section 3(a)(58)(B) of the Exchange Act (15 U.S.C. 78c(a)(58)(B)), so state. N/A (b) If applicable, provide the disclosure required by Rule 10A-3(d) under the Exchange Act (17 CFR 240.10A-3(d)) regarding an exemption from the listing standards for audit committees. N/A Item 6. Schedule of Investments. File Schedule I Investments in securities of unaffiliated issuers as of the close of the reporting period as set forth in 210.12- 12 of Regulation S-X [17 CFR 210.12-12], unless the schedule is included as part of the report to shareholders filed under Item 1 of this Form. Included in Item 1 ITEM 7. DISCLOSURE OF PROXY VOTING POLICIES AND PROCEDURES FOR CLOSED-END MANAGEMENT INVESTMENT COMPANIES. A closed-end management investment company that is filing an annual report on this Form N-CSR must, unless it invests exclusively in non-voting securities, describe the policies and procedures that it uses to determine how to vote proxies relating to portfolio securities, including the procedures that the company uses when a vote presents a conflict between the interests of its shareholders, on the one hand, and those of the company's investment adviser; principal underwriter; or any affiliated person (as defined in Section 2(a)(3) of the Investment Company Act of 1940 (15 U.S.C. 80a-2(a)(3)) and the rules thereunder) of the company, its investment adviser, or its principal underwriter, on the other. Include any policies and procedures of the company's investment adviser, or any other third party, that the company uses, or that are used on the company's behalf, to determine how to vote proxies relating to portfolio securities. Not applicable to open-end management investment companies. Item 8. Portfolio Managers of Closed-End Management Investment Companies. (a) If the registrant is a closed-end management investment company that is filing an annual report on this Form N-CSR,provide the following information: (1) State the name, title, and length of service of the person or persons employed by or associated with the registrant or an investment adviser of the registrant who are primarily responsible for the day-to-day management of the registrants portfolio (Portfolio Manager). Also state each Portfolio Managers business experience during the past 5 years. Not applicable to open-end management investment companies. Item 9. Purchases of Equity Securities by Closed-End Management Investment Company and Affiliated Purchasers. (a) If the registrant is a closed-end management investment company, in the following tabular format, provide the information specified in paragraph (b) of this Item with respect to any purchase made by or on behalf of the registrant or any affiliated purchaser, as defined in Rule 10b-18(a)(3) under the Exchange Act (17 CFR 240.10b-18(a)(3)), of shares or other units of any class of the registrants equity securities that is registered by the registrant pursuant to Section 12 of the Exchange Act (15 U.S.C. 781). Instruction to paragraph (a). Disclose all purchases covered by this Item, including purchases that do not satisfy the conditions of the safe harbor of Rule 10b-18 under the Exchange Act (17 CFR 240.10b-18), made in the period covered by the report. Provide disclosures covering repurchases made on a monthly basis. For example, if the reporting period began on January 16 and ended on July 15, the chart would show repurchases for the months from January 16 through February 15, February 16 through March 15, March 16 through April 15, April 16 through May 15, May 16 through June 15, and June 16 through July 15. Not applicable to open-end management investment companies. Item 10. Submission of Matters to a Vote of Security Holders. Describe any material changes to the procedures by which shareholders may recommend nominees to the registrants board of directors, where those changes were implemented after the registrant last provided disclosure in response to the requirements of Item 7(d)(2)(ii)(G) of Schedule 14A (17 CFR 240.14a-101), or this Item. There have been no material changes to the procedures by which the shareholders may recommend nominees to the registrants board of directors since the registrant last provided disclosure in response to the requirements of Item 7(d)(2)(ii)(G) of Schedule 14(A) in its definitive proxy statement, or this Item. ITEM 11. CONTROLS AND PROCEDURES. (a) Disclose the conclusions of the registrant's principal executive officer or officers and principal financial officer or officers, or persons performing similar functions, about the effectiveness of the registrant's disclosure controls and procedures (as defined in Rule 30a-2(c) under the Act (17 CFR 270.30a-2(c))) based on their evaluation of these controls and procedures as of a date within 90 days of the filing date of the report that includes the disclosure required by this paragraph. The registrant's principal executive officer and principal financial officer have concluded, that the registrant's disclosure controls and procedures are effective based on their evaluation of these controls and procedures as of a date within 90 days of the filing date of this report. (b) Disclose whether or not there were significant changes in the registrant's internal controls or in other factors that could significantly affect these controls subsequent to the date of their evaluation, including any corrective actions with regard to significant deficiencies and material weaknesses. There were no significant changes in the registrant's internal 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. The registrant's principal executive officer and principal financial officer, however, voluntarily are reporting the following information: In August of 2006 the registrant's investment adviser enhanced its internal procedures for reporting performance information required to be included in prospectuses. Those enhancements involved additional internal controls over the appropriateness of performance data generated for this purpose. Such enhancements were made following an internal review which identified prospectuses relating to certain classes of shares of a limited number of registrants where, inadvertently, performance information not reflecting the deduction of applicable sales charges was included. Those prospectuses were revised, and the revised prospectuses were distributed to shareholders. ITEM 12. EXHIBITS. File the exhibits listed below as part of this Form. Letter or number the exhibits in the sequence indicated. (a) Any code of ethics, or amendment thereto, that is the subject of the disclosure required by Item 2, to the extent that the registrant intends to satisfy the Item 2 requirements through filing of an exhibit. (b) A separate certification for each principal executive officer and principal financial officer of the registrant as required by Rule 30a-2 under the Act (17 CFR 270.30a-2). Filed herewith. SIGNATURES [See General Instruction F] Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized. (Registrant) Pioneer Ibbotson Asset Allocation Series By (Signature and Title)* /s/ John F. Cogan, Jr. John F. Cogan, Jr, President Date September 29, 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 September 29, 2006 By (Signature and Title)* /s/ Vincent Nave Vincent Nave, Treasurer Date September 29, 2006 * Print the name and title of each signing officer under his or her signature.