AIM INVESTMENT FUNDS
497, 1999-10-04
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                     CLASS A, CLASS B AND CLASS C SHARES OF:

                            AIM GLOBAL RESOURCES FUND

                        Supplement dated October 1, 1999
                     to the Prospectus dated March 1, 1999,
                          as Supplemented July 1, 1999

This supplement supercedes and replaces in its entirety the supplement dated
July 1, 1999.

The following replaces in its entirety the fifth paragraph appearing under the
heading "INVESTMENT OBJECTIVE AND STRATEGIES" on Page 1 of the Prospectus:

                  "In anticipation of or in response to adverse market
         conditions, for cash management purposes, or for defensive
         purposes, the portfolio may temporarily hold all or a portion
         of its assets in cash (U.S. dollars, foreign currencies or
         multinational currency units), money market instruments,
         shares of affiliated money market funds, or high-quality debt
         securities. As a result, the fund or the portfolio may not
         achieve its investment objective."

The following paragraph is added immediately following the fourth paragraph
under the heading "PRINCIPAL RISKS OF INVESTING IN THE FUND" on Page 1 of the
Prospectus:

                  "The portfolio may participate in the initial public
        offering (IPO) market. Because of the portfolio's small asset base, any
        investment the portfolio may make in IPOs may significantly increase the
        fund's and the portfolio's total returns. As the portfolio's assets
        grow, the impact of IPO investments will decline, which may reduce the
        fund's and the portfolio's total returns."

The following is added at the end of the paragraph under the heading
"PERFORMANCE INFORMATION" on page 3 of the Prospectus:

         "Total return information in the bar chart and table below
         may be affected by special market factors, including the
         portfolio's investment in IPOs, which may have a magnified impact on
         the portfolio due to its small asset base. There is no guarantee that,
         as the portfolio's assets grow, the fund and the portfolio will
         continue to experience substantially similar performance."

Effective October 1, 1999, the following replaces in its entirety the
information appearing under the heading "FUND MANAGEMENT-PORTFOLIO MANAGER" on
page 5 of the Prospectus:

         "The advisor uses a team approach to investment management.
         The individual members of the team who are primarily
         responsible for the day-to-day management of the portfolio
         are:

         o    Derek S. Izuel, Portfolio Manager, who has been responsible for
              the fund since 1999 and has been associated with the advisor
              and/or its affiliates since 1997. From 1995 to 1997 he was a full
              time student at the University of Michigan. From 1991 to 1995 he
              was a Software Engineer with Bank of America.

         o    Roger Mortimer, Portfolio Manager, who has been responsible for
              the fund since 1999 and has been associated with the advisor
              and/or its affiliates since 1995.

         o    Derek H. Webb, Portfolio Manager, who has been responsible for the
              fund since 1994 and has been associated with the advisor and/or
              its affiliates since 1992.

         o    Michael Yellen, Senior Portfolio Manager, who has been responsible
              for the fund since 1999 and has been associated with the advisor
              and/or its affiliates since 1994."
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The following paragraph is added immediately following the third paragraph under
the heading "FINANCIAL HIGHLIGHTS" on Page 6 of the Prospectus:

              "Total return information in this table may be affected by special
         market factors, including the portfolio's investment in IPOs, which
         may have a magnified impact on the portfolio due to its small asset
         base. There is no guarantee that, as the portfolio's assets grow, the
         fund and the portfolio will continue to experience substantially
         similar performance."

The following new section is added immediately after the section entitled
"SHAREHOLDER INFORMATION-REDEEMING SHARES-REDEMPTION OF AIM CASH RESERVE SHARES
OF AIM MONEY MARKET FUND ACQUIRED BY EXCHANGE" on Page A-4 of the Prospectus:

         "REDEMPTION OF CLASS B SHARES OR CLASS C SHARES ACQUIRED BY EXCHANGE
         FROM AIM CASH RESERVE SHARES OF AIM MONEY MARKET FUND

         We will begin the holding period for purposes of calculating the CDSC
         on Class B shares or Class C shares acquired by exchange from AIM Cash
         Reserve Shares of AIM Money Market Fund at the time of the exchange
         into Class B shares or Class C shares."

The first paragraph under the heading "SHAREHOLDER INFORMATION-EXCHANGING
SHARES-PERMITTED EXCHANGES" on Page A-6 of the Prospectus is replaced with the
following:

         "Except as otherwise stated below, you may exchange your shares for
         shares of the same class of another AIM Fund. You may exchange AIM Cash
         Reserve Shares of AIM Money Market Fund for Class A shares of another
         AIM Fund, or vice versa. You may also exchange AIM Cash Reserve Shares
         of AIM Money Market Fund for Class B shares or Class C shares of
         another AIM Fund, but only if the AIM Cash Reserve Shares were
         purchased directly and not acquired by exchange. You may be required to
         pay an initial sales charge when exchanging from a Fund with a lower
         initial sales charge than the one into which you are exchanging. If you
         exchange from Class A shares not subject to a CDSC into Class A shares
         subject to those charges, you will be charged a CDSC when you redeem
         the exchanged shares. The CDSC charged on redemption of those shares
         will be calculated starting on the date you acquired those shares
         through exchange."

A new paragraph (5) is added under the heading "SHAREHOLDER
INFORMATION-EXCHANGING SHARES-PERMITTED EXCHANGES-YOU WILL NOT PAY A SALES
CHARGE WHEN EXCHANGING:" on Page A-6 of the Prospectus, and the new paragraph
(5) reads as follows:

         "(5) AIM Cash Reserve Shares of AIM Money Market Fund for Class B
         shares and Class C shares."

The following replaces in its entirety the information appearing under the
heading "EXCHANGING SHARES - EXCHANGE CONDITIONS" on page A-6 of the Prospectus:

         "The following conditions apply to all exchanges:

         o    You must meet the minimum purchase requirements for the AIM Fund
              into which you are exchanging;

         o    Shares of the AIM Fund you wish to acquire must be available for
              sale in your state of residence;

         o    Exchanges must be made between accounts with identical
              registration information;

         o    The account you wish to exchange from must have a certified tax
              identification number (or the Fund has received an appropriate
              Form W-8 or W-9);

         o    Shares must have been held for at least one day prior to the
              exchange;
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         o    If you have physical share certificates, you must return them to
              the transfer agent prior to the exchange; and

         o    You are limited to a maximum of 10 exchanges per calendar year,
              because excessive short-term trading or market-timing activity can
              hurt fund performance. If you exceed that limit, or if an AIM Fund
              or the distributor determines, in its sole discretion, that your
              short-term trading is excessive or that you are engaging in
              market-timing activity, it may reject any additional exchange
              orders. An exchange is the movement out of (redemption) one AIM
              Fund and into (purchase) another AIM Fund."



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