Pioneer Fund

Objective And Strategy

Objective
Reasonable income and capital growth.

Strategy
Invests primarily in a large-cap portfolio that diversifies across all sectors of the S&P 500. Follows a value style of investing, seeking high quality securities selling at substantial discounts to their intrinsic values. Uses fundamental research-driven process and a bottom-up analytic style. Diversified portfolio with approximately 140-150 holdings. Most sectors within 5% of S&P 500 & reg; weighting. Most industries within 3% of S&P 500 & reg; weighting.

Principal Risks

* The portfolio invests substantial assets in real estate investment trusts (REITS) that present risks not associated with investing in stock.

* This Fund may invest in publicly issued equity securities, including common stocks. Investments in common stocks are subject to market risks that may cause their prices to fluctuate over time.

* Value stocks may perform differently from the market as a whole and following a value-oriented investment strategy may cause the Portfolio to at times underperform equity funds that use other investment strategies.

* The risk that a preferred stock will decline in price, or fail to pay dividends when expected, because the issuer experiences a decline in its financial status, or that such stock may be illiquid.

* The investment adviser to the fund actively managed the fund's investments. Consequently, the fund is subject to the risk that the methods and analyses employed by the investment adviser in this process may not produce the desired results. This could cause the fund to lose value or its investment results to lag relevant benchmarks or other funds with similar objectives.

* A futures contract is considered a derivative because it derives its value from the price of the underlying security or financial index. The prices of futures contracts can be volatile, and futures contracts may be illiquid. In addition, there may be imperfect or even negative correlation between the price of a futures contract and the price of the underlying securities.

* The fund may purchase warrants, including warrants traded independently of the underlying securities. Warrants are rights to purchase securities at specific prices valid for a specific period of time. Their prices do not necessarily move parallel to the prices of the underlying securities, and warrant holders receive no dividends and have no voting rights or rights with respect to the assets of an issuer. Warrants cease to have value if not exercised prior to their expiration dates.