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

                          AIM DEVELOPING MARKETS FUND
                         AIM LATIN AMERICAN GROWTH FUND

                  (SERIES PORTFOLIOS OF AIM INVESTMENT FUNDS)

                        Supplement dated October 4, 1999
        To the Statement of Additional Information dated March 1, 1999

           The following paragraph replaces in its entirety the information
appearing under the heading "INVESTMENT STRATEGIES AND RISKS-INVESTMENT IN
OTHER INVESTMENT COMPANIES" on page 9 of the Statement of Additional
Information:

           "With respect to certain countries, investments by the Funds
     presently may be made only by acquiring shares of other investment
     companies (including investment vehicles or companies advised by AIM or
     its affiliates) with local governmental approval to invest in those
     countries. To the extent that a Fund invests in such companies, the prices
     paid by the Fund and the proceeds to the Fund upon sale of the shares may
     reflect premiums above or discounts to the net asset value of the assets
     owned by such investment companies. At such time as direct investment in
     these countries is allowed, and the Funds anticipate investing directly in
     these markets. The Funds may invest in other investment companies to the
     extent permitted by the 1940 Act, rules and regulations thereunder, and
     any applicable exemptive orders granted by the SEC. Under an exemptive
     order granted by the SEC, each Fund is permitted to, and intends to,
     invest its cash (and cash collateral received in connection with the
     lending of portfolio securities) in shares of money market investment
     companies advised by AIM or its affiliates ("Affiliated Money Market
     Funds"), provided that those investments do not exceed 25% of the total
     assets of such Fund. In general, a purchase of investment company
     securities may result in the duplication of fees and expenses. With
     respect to a Fund's purchase of shares of Affiliated Money Market Funds,
     the Fund will indirectly pay the advisory fees and other operating
     expenses of the Affiliated Money Market Funds."

           The following paragraph replaces the first paragraph appearing under
the heading "INVESTMENT STRATEGIES AND RISKS-TEMPORARY DEFENSIVE STRATEGIES"
on page 13 of the Statement of Additional Information.

           "In anticipation of or in response to adverse market conditions, for
     cash management purposes, or for defensive purposes, each of the Funds may
     temporarily hold all or a portion of its assets in cash (U.S. dollars,
     foreign currencies or multinational currency units such as Euros), money
     market instruments, or high-quality debt securities. Each of the Funds may
     also invest up to 25% of its total assets in Affiliated Money Market Funds
     for these purposes. In addition, for temporary defensive purposes, most or
     all of each Fund's investments may be made in the United States and
     denominated in U.S. dollars. To the extent a Fund employs a temporary
     defensive strategy, it will not be invested so as to achieve directly its
     investment objectives."

           The following replaces in its entirety item "(1)" appearing under
the heading "INVESTMENT LIMITATIONS-LATIN AMERICAN FUND" under the
non-fundamental policies discussion on page 37 of the Statement of Additional
Information:

           "(1) Invest in securities of an issuer if the investment would cause
     Latin American Fund to own more than 10% of any class of securities of any
     one issuer, except that the Fund may purchase securities of Affiliated
     Money Market Funds to the extent permitted by exemptive order."

           The following replaces in its entirety the paragraph appearing after
item "(7)" under the heading "INVESTMENT LIMITATIONS-LATIN AMERICAN FUND"
on page 38 of the Statement of Additional Information:

           "Latin American Fund has the authority to invest up to 10% of its
     total assets in shares of other investment companies pursuant to the 1940
     Act. The Fund may not invest more than 5% of its total assets in any one
     investment company or acquire more than 3% of the outstanding voting
     securities of any one investment company, except that the Fund may
     purchase securities of Affiliated Money Market Funds to the extent
     permitted by exemptive order."


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           The following new section is added after the eleventh paragraph
appearing under the heading "EXECUTION OF PORTFOLIO TRANSACTIONS" on page 39 of
the Statement of Additional Information:

     "ALLOCATION OF INITIAL PUBLIC OFFERING ("IPO") SECURITIES TRANSACTIONS

           From time to time, certain of the mutual funds managed by AIM or A I
     M Capital Management, Inc. (collectively, the "AIM Funds") may become
     interested in participating in security distributions that are available
     in an IPO, and occasions may arise when purchases of such securities by
     one AIM Fund may also be considered for purchase by one or more other AIM
     Funds. In such cases, it shall be AIM's practice to specifically combine
     or otherwise bunch indications of interest for IPO securities for all AIM
     Funds participating in purchase transactions for that security, and to
     allocate such transactions in accordance with the following procedures:

           AIM will determine the eligibility of each AIM Fund that seeks to
     participate in a particular IPO by reviewing a number of factors,
     including suitability of the investment with the AIM Fund's investment
     objective, policies and strategies, the liquidity of the AIM Fund if such
     investment is purchased, and whether the portfolio manager intends to hold
     the security as a long-term investment. The allocation of limited supply
     securities issued in IPOs will be made to eligible AIM Funds in a manner
     designed to be fair and equitable for the eligible AIM Funds, and so that
     there is equal allocation of IPOs over the longer term. Where multiple
     funds are eligible, rotational participation may occur, based on the
     extent to which an AIM Fund has participated in previous IPOs as well as
     the size of the AIM Fund. Each eligible AIM Fund with an asset level of
     less than $500 million, will be placed in one of three tiers, depending
     upon its asset level. The AIM Funds in the tier containing funds with the
     smallest asset levels will participate first, each receiving a 40 basis
     point allocation (rounded to the nearest share round lot that approximates
     40 basis points) (the "Allocation"), based on that AIM Fund's net assets.
     This process continues until all of the AIM Funds in the three tiers
     receive their Allocations, or until the shares are all allocated. Should
     securities remain after this process, eligible AIM Funds will receive
     their Allocations on a straight pro rata basis. For the tier of AIM Funds
     not receiving a full Allocation, the Allocation may be made only to
     certain AIM Funds so that each may receive close to or exactly 40 basis
     points.

           Any AIM Funds with substantially identical investment objectives and
     policies will participate in syndicates in amounts that are substantially
     proportionate to each other. In these cases, the net assets of the largest
     AIM Fund will be used to determine in which tier, as described in the
     paragraph above, such group of AIM Funds will be placed. The price per
     share of securities purchased in such syndicate transactions will be the
     same for each AIM Fund."

           The following new paragraph is added after the fifth paragraph
appearing under the heading "INVESTMENT RESULTS-PERFORMANCE INFORMATION" on
page 66 of the Statement of Additional Information:

           "Some or all of the Funds may participate in the IPO market, and a
     significant portion of those Funds' returns may be attributable to their
     investment in IPOs, which have a magnified impact due to the Funds' small
     asset bases. There is no guarantee that as the Funds' assets grow, they
     will continue to invest to the same degree in IPOs or that they will
     experience substantially similar performance."

The following replaces in its entirety the table appearing under the heading
"MANAGEMENT-TRUSTEES AND EXECUTIVE  OFFICERS" on page 40 of the Statement of
Additional Information:

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<PAGE>   3
<TABLE>
<CAPTION>
- ----------------------------  ---------------------------  -----------------------------------------------------------

                                 POSITIONS HELD WITH       PRINCIPAL OCCUPATION DURING AT LEAST THE PAST 5 YEARS
   "NAME, ADDRESS AND AGE              REGISTRANT

- ----------------------------  ---------------------------  -----------------------------------------------------------
<S>                           <C>                          <C>
*ROBERT H. GRAHAM (52)         Trustee, Chairman of the    Director,  President and Chief  Executive  Officer,  A I M
                                 Board and President       Management  Group  Inc.;  Director  and  President,  A I M
                                                           Advisors, Inc.; Director and Senior Vice President, A I M
                                                           Capital Management, Inc., A I M Distributors, Inc., A I M
                                                           Fund Services, Inc. and Fund Management Company; and
                                                           Director, AMVESCAP PLC.
- ----------------------------  ---------------------------  -----------------------------------------------------------

C. DEREK ANDERSON (58)                 Trustee             President,   Plantagenet  Capital   Management,   LLC  (an
220 Sansome Street                                         investment   partnership);    Chief   Executive   Officer,
Suite 400                                                  Plantagenet  Holdings,  Ltd. (an investment banking firm);
San Francisco, CA 94104                                    Director,  Anderson Capital  Management,  Inc. since 1988;
                                                           Director, Premium Wear, Inc. (formerly Munsingwear,  Inc.)
                                                           (a casual apparel company);  and Director, 'R' Homes, Inc.
                                                           and various other privately owned companies.

- ----------------------------  ---------------------------  -----------------------------------------------------------

FRANK S. BAYLEY (60)                   Trustee             Partner,  law  firm of  Baker  &  McKenzie;  Trustee,  The
Two Embarcadero Center                                     Bradley  Funds;  and Director and Chairman,  C. D. Stimson
Suite 2400                                                 Company  (a  private   investment   company)  and  Stimson
San Francisco, CA 94111                                    Marina, Inc. (a subsidiary of C.D. Stimson Co.).

- ----------------------------  ---------------------------  -----------------------------------------------------------

RUTH H. QUIGLEY (64)                   Trustee             Private  investor;  and President,  Quigley  Friedlander &
1055 California Street                                     Co., Inc. (a financial  advisory  services firm) from 1984
San Francisco, CA 94108                                    to 1986.

- ----------------------------  ---------------------------  -----------------------------------------------------------

MELVILLE B. COX (55)                Vice President         Vice  President  and  Chief  Compliance   Officer,   A I M
                                                           Advisors,  Inc.,  A I M Capital  Management,  Inc.,  A I M
                                                           Distributors,  Inc.,  A I M Fund  Services,  Inc. and Fund
                                                           Management Company.

- ----------------------------  ---------------------------  -----------------------------------------------------------

GARY T. CRUM (52)                   Vice President         Director and President,  A I M Capital  Management,  Inc.;
                                                           Director and Executive Vice  President,  A I M  Management
                                                           Group Inc. and A I M Advisors,  Inc.; and Director,  A I M
                                                           Distributors, Inc. and AMVESCAP PLC.

- ----------------------------  ---------------------------  -----------------------------------------------------------
</TABLE>

- --------
    *  A trustee who is an "interested person" of the Trust and AIM
       as defined in the 1940 Act.

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<PAGE>   4
<TABLE>
<CAPTION>
- ----------------------------  ---------------------------  -----------------------------------------------------------

                                 POSITIONS HELD WITH       PRINCIPAL OCCUPATION DURING AT LEAST THE PAST 5 YEARS
   NAME, ADDRESS AND AGE              REGISTRANT

- ----------------------------  ---------------------------  -----------------------------------------------------------
<S>                           <C>                          <C>

CAROL F. RELIHAN (44)               Vice President         Director,  Senior  Vice  President,  General  Counsel  and
                                                           Secretary,  A I M Advisors,  Inc.;  Senior Vice President,
                                                           General  Counsel and  Secretary,  A I M  Management  Group
                                                           Inc.; Director,  Vice President and General Counsel,  Fund
                                                           Management  Company;  Vice President and General  Counsel,
                                                           A I M  Fund  Services,  Inc.;  and Vice  President,  A I M
                                                           Capital Management, Inc. and A I M Distributors, Inc.

- ----------------------------  ---------------------------  -----------------------------------------------------------

SAMUEL D. SIRKO (40)              Vice President and       Assistant  General Counsel and Assistant  Secretary of
                                      Secretary            A I M Management Group, Inc., A I M Capital Management,
                                                           Inc., A I M Distributors, Inc., A I M Fund Services, Inc.,
                                                           and Fund Management Company; and Vice President, Assistant
                                                           General Counsel and Assistant Secretary of A I M Advisors,
                                                           Inc.
- ----------------------------  ---------------------------  -----------------------------------------------------------

DANA R. SUTTON (40)               Vice President and       Vice President and Fund Controller,  A I M Advisors, Inc.;
                                      Treasurer            and Assistant  Vice  President  and  Assistant  Treasurer,
                                                           Fund Management Company."

- ----------------------------  ---------------------------  -----------------------------------------------------------
</TABLE>

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