SHORT TERM INVESTMENTS CO /TX/
485APOS, 1999-11-08
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<PAGE>

   As filed with the Securities and Exchange Commission on November 8, 1999

                                              1933 Act Registration No. 33-66240
                                              1940 Act Registration No. 811-7892

                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C. 20549

                                 FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933                      X
                                                                            ___
  Pre-Effective Amendment No. ____                                          ___

  Post-Effective Amendment No. 10                                            X
                              ____                                          ___

                                          and/or
REGISTRATION STATEMENT UNDER THE
INVESTMENT COMPANY ACT OF 1940                                              ___

  Amendment No.    11                                                        X
                  ____                                                      ___

                       (Check appropriate box or boxes.)

                          SHORT-TERM INVESTMENTS CO.
             _____________________________________________________
              (Exact Name of Registrant as Specified in Charter)

            11 Greenway Plaza, Suite 100, Houston, TX    77046-1173
        ______________________________________________________________
              (Address of Principal Executive Offices) (Zip Code)

      Registrant's Telephone Number, including Area Code   (713) 626-1919
                                                           _______________

                               Charles T. Bauer
            11 Greenway Plaza, Suite 100, Houston, TX    77046-1173
        ______________________________________________________________
                    (Name and Address of Agent for Service)

                                 Copy to:

          Renee A. Friedli, Esquire             Martha J. Hays, Esquire
             A I M Advisors, Inc.        Ballard Spahr Andrews & Ingersoll, LLP
        11 Greenway Plaza, Suite 100         1735 Market Street, 51st Floor
         Houston, Texas  77046-1173      Philadelphia, Pennsylvania  19103-7599

Approximate Date of Proposed Public Offering:  As soon as practicable after the
                                               effective date of this Amendment

It is proposed that this filing will become effective (check appropriate box)

___  immediately upon filing pursuant to paragraph (b)
___  on (date) pursuant to paragraph (b)
___  60 days after filing pursuant to paragraph (a)(1)

 x   on December 17, 1999 pursuant to paragraph (a)(1)
___

___  75 days after filing pursuant to paragraph (a)(2)
___  on (date) pursuant to paragraph (a)(2) of rule 485

If appropriate, check the following box:

___  This post-effective amendment designates a new effective date for a
     previously filed post-effective amendment.

Title of Securities Being Registered:  Common Stock
<PAGE>

[AIM LOGO]


CASH MANAGEMENT CLASS

LIQUID ASSETS PORTFOLIO
                                                               PROSPECTUS
                                                               DECEMBER 17, 1999



Liquid Assets Portfolio seeks to provide as high a level of current income as is
consistent with the preservation of capital and liquidity.

This prospectus contains important information about the Cash Management Class
of the fund. Please read it before investing and keep it for future reference.

As with all other mutual fund securities, the Securities and Exchange Commission
has not approved or disapproved these securities or determined whether the
information in this prospectus is adequate or accurate. Anyone who tells you
otherwise is committing a crime.

There can be no assurance that the fund will be able to maintain a stable net
asset value of $1.00 per share.


                                       1
<PAGE>

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                           Page
<S>                                                                        <C>
Investment Objective and Strategies.......................................    3

Principal Risks of Investing in the Fund..................................    3

Performance Information...................................................    5
    Annual Total Returns..................................................    5
    Performance Table.....................................................    6

Fee Table and Expense Example.............................................    7
    Fee Table.............................................................    7
    Expense Example.......................................................    7

Fund Management...........................................................    8
    The Advisor...........................................................    8
    Advisor Compensation..................................................    8

Other Information.........................................................    9
    Suitability for Investors.............................................    9
    Dividends and Distributions...........................................    9

Financial Highlights......................................................   10

Shareholder Information...................................................   11
    Distribution and Service (12b-1) Fees.................................   11
    Purchasing Shares.....................................................   11
    Redeeming Shares......................................................   12
    Pricing of Shares.....................................................   12
    Taxes.................................................................   13
Obtaining Additional Information................................Back Cover Page
</TABLE>

The AIM Family of Funds, The AIM Family of Funds and Design (i.e., the AIM
logo), AIM and Design, AIM, AIM LINK, AIM Institutional Funds, aimfunds.com, La
Familia AIM de Fondos, La Familia AIM de Fondos and Design and Invest with
Discipline are registered service marks and AIM Bank Connection, AIM Funds, AIM
Funds and Design, AIM Internet Connect and AIM Investor are service marks of
A I M Management Group Inc.

No dealer, salesperson or any other person has been authorized to give any
information or to make any representations other than those contained in this
prospectus, and you should not rely on such other information or
representations.

                                       2
<PAGE>

INVESTMENT OBJECTIVE AND STRATEGIES

The fund's investment objective is to provide as high a level of current income
as is consistent with the preservation of capital and liquidity.

The fund attempts to meet this objective by investing only in high-quality U.S.
dollar denominated short-term obligations, including:

 . securities issued by the U.S. government or its agencies;

 . bankers' acceptances, certificates of deposit and time deposits from banks;

 . repurchase agreements;

 . commercial paper;

 . taxable municipal securities; and

 . master notes.

The fund will maintain a weighted average maturity of 90 days or less. The fund
invests in compliance with Rule 2a-7 under the Investment Company Act of 1940.
The fund may invest up to 50% of its assets in U.S. dollar-denominated foreign
securities.

The portfolio managers focus on securities they believe have favorable prospects
for current income consistent with the preservation of capital and liquidity.
The portfolio managers usually hold portfolio securities to maturity, but may
sell a particular security when they deem it advisable, such as when any of the
factors above materially changes.

In anticipation of or in response to adverse market conditions, for cash
management purposes or for defensive purposes, the fund may temporarily hold all
or a portion of its assets in cash or shares of affiliated money market funds.
As a result, the fund may not achieve its investment objective.

PRINCIPAL RISKS OF INVESTING IN THE FUND

An investment in the fund is not a deposit of a bank and is not insured or
guaranteed by the Federal Deposit Insurance Corporation or any other government
agency. Although the fund seeks to preserve the value of your investment at
$1.00 per share, it is possible to lose money by investing in the fund.
Additionally, the fund's yield will vary as the short-term securities in its
portfolio mature and the proceeds are reinvested in securities with different
interest rates.

The following factors could reduce the fund's income and/or share price:

 . sharply rising interest rates;

 . downgrades of credit ratings or defaults of any of the fund's holdings; and

 . the risks generally associated with concentrating investments in the banking
  industry, such as interest rate risk, credit risk and regulatory developments
  relating to the banking and financial services industries.

If the seller of a repurchase agreement in which the fund invests defaults on
its obligation or declares bankruptcy, the fund may experience delays in selling
the securities underlying the repurchase agreement. As a result, the fund may
incur losses arising from a decline in the value of those securities, reduced
levels of income and expenses of enforcing its rights.

                                       3
<PAGE>

The value of your shares could be adversely affected if the computer systems
used by the fund's investment advisor and the fund's other service providers are
unable to distinguish the year 2000 from the year 1900.

The fund's investment advisor and independent technology consultants are working
to avoid year 2000-related problems in its systems and to obtain assurances that
other service providers are taking similar steps. Year 2000 problems may also
affect issuers in whose securities the fund invests.

                                       4
<PAGE>

PERFORMANCE INFORMATION

The bar chart and table shown below provide an indication of the risks of
investing in the fund.  The fund's past performance is not necessarily an
indication of its future performance.

ANNUAL TOTAL RETURNS

The following bar chart shows changes in the performance of the Cash Management
Class shares from year to year.  The Cash Management Class shares are not
subject to sales loads.


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

                             Cash Management Class

                             [GRAPH APPEARS HERE]

<TABLE>
<CAPTION>

Year              Return %
- ----              --------
<S>               <C>
1997                5.59%
1998                5.53%
</TABLE>
- -------------------------------------------------------------------------------




The Cash Management Class shares' year-to-date total return as of September 30,
1999 was 3.74%.

During the periods shown in the bar chart, the highest quarterly return was
1.41% (quarter ended December 31, 1997) and the lowest quarterly return was
1.29% (quarter ended December 31, 1998).


                                       5
<PAGE>

PERFORMANCE TABLE

The following performance table reflects the performance of Cash Management
Class shares over the periods indicated.

<TABLE>
<CAPTION>

- -----------------------------------------------------------------------------------------------
       Average Annual Total Returns
 (for the periods ended December 31, 1998)
                                                                            Since     Inception
                                               1 Year   5 Years  10 Years  Inception     Date
- -----------------------------------------------------------------------------------------------
<S>                                            <C>      <C>      <C>       <C>         <C>
Cash Management Class                          5.53%       --        --       5.51%    01/17/96
- -----------------------------------------------------------------------------------------------
</TABLE>


Cash Management Class shares' seven-day yield on December 31, 1998 was 5.02%.
For the current seven-day yield, call (800) 877-7745.


                                       6
<PAGE>

FEE TABLE AND EXPENSE EXAMPLE

FEE TABLE

This table describes the fees and expenses that you may pay if you buy and hold
shares of the fund:

<TABLE>
<CAPTION>

                                                                    Cash Management Class
                                                                    ---------------------
<S>                                                                 <C>
Shareholder Fees (fees paid directly from your investment)

    Maximum Sales Charge (Load) Imposed on Purchases
      (as a percentage of offering price)                                     None

    Maximum Deferred Sales Charge (Load)
      (as a percentage of original purchase price
      or redemption proceeds, whichever is less)                              None

Annual Fund Operating Expenses (expenses that are deducted
  from fund assets)

    Management Fees(1)                                                        0.15 %
    Distribution and/or Service (12b-1) Fees                                  0.10
    Other Expenses                                                            0.03
    Total Annual Fund Operating Expenses                                      0.28
    Fee Waiver(2)                                                             0.02
    Net Expenses                                                              0.26
</TABLE>

- --------------------
(1)  The investment advisor has voluntarily agreed to limit Management Fees to
     0.055%.  This limitation can be terminated at any time.  Total Annual Fund
     Operating Expenses, net of this voluntary limitation, are 0.17%.

(2)  The distributor has contractually agreed to waive 0.02% of the Rule 12b-1
     distribution plan fee.

You should also consider the effect of any account fees charged by the financial
institution managing the account.

EXPENSE EXAMPLE

This example is intended to help you compare the costs of investing in the Cash
Management Class of the fund with the cost of investing in other mutual funds.

The example assumes that you invest $10,000 in the fund for the time periods
indicated and then redeem all of your shares at the end of those periods.  The
example also assumes that your investment has a 5% return each year and that the
fund's gross operating expenses remain the same. To the extent fees are waived
or expenses are reimbursed, the expenses will be lower.  Although your actual
returns and costs may be higher or lower, based on these assumptions your costs
would be:

<TABLE>
<CAPTION>

                                              1 Year      3 Years      5 Years      10 Years
                                              ------      -------      -------      --------
<S>                                           <C>         <C>          <C>          <C>
Cash Management Class                           $29         $90          $157         $356
</TABLE>

                                       7
<PAGE>

FUND MANAGEMENT

THE ADVISOR

A I M Advisors, Inc. (the advisor) serves as the fund's investment advisor and
is responsible for its day-to-day management.  The advisor is located at 11
Greenway Plaza, Suite 100, Houston, Texas 77046-1173.  The advisor supervises
all aspects of the fund's operations and provides investment advisory services
to the fund, including obtaining and evaluating economic, statistical and
financial information to formulate and implement investment programs for the
fund.

The advisor has acted as an investment advisor since its organization in 1976.
Today, the advisor, together with its subsidiaries, advises or manages over 125
investment portfolios, including the fund, encompassing a broad range of
investment objectives.

ADVISOR COMPENSATION

During the fiscal year ended August 31, 1999, the advisor received compensation
of 0.06% of average daily net assets.


                                       8
<PAGE>

OTHER INFORMATION

SUITABILITY FOR INVESTORS

The Cash Management Class of the fund is intended for use primarily by
institutional customers of banks, certain broker-dealers and other financial
institutions (institutions).  It is expected that the shares of the Cash
Management Class may be particularly suitable investments for corporate cash
managers, municipalities or other public entities.  Except for participants in
the AMVESCAP Sharesave Plan (the sharesave plan), individuals, corporations,
partnerships and other businesses that maintain qualified accounts at an
institution may invest in shares of the Cash Management Class through the
institution, but may not purchase shares directly.  Each institution will render
administrative support services to its customers who are the beneficial owners
of the shares of the Cash Management Class.  Such services include, among other
things, establishment and maintenance of shareholder accounts and records;
assistance in processing purchase and redemption transactions in shares of the
Cash Management Class; providing periodic statements showing a client's account
balance in shares of the Cash Management Class; distribution of fund proxy
statements, annual reports and other communications to shareholders whose
accounts are serviced by the institution; and such other services as the fund
may reasonably request.  Institutions will be required to certify to the fund
that they comply with applicable state law regarding registration as broker-
dealers, or that they are exempt from such registration.

The Cash Management Class is designed to be a convenient and economical way to
invest in an open-end diversified money market fund.  It is anticipated that
most investors will perform their own subaccounting.

Investors in the Cash Management Class have the opportunity to receive a
somewhat higher yield than might be obtainable through direct investment in
money market instruments, and enjoy the benefits of diversification, economies
of scale and same-day liquidity.  Generally, higher interest rates can be
obtained on the purchase of very large blocks of money market instruments.  Of
course, any such relative increase in interest rates may be offset to some
extent by the operating expenses of the Cash Management Class.

DIVIDENDS AND DISTRIBUTIONS

Dividends

The fund generally declares dividends on each business day and pays dividends
monthly.  A business day is any day on which both the Federal Reserve Bank of
New York and The Bank of New York, the fund's custodian, are open for business.

Dividends are paid on settled shares of the fund as of 5:00 p.m. Eastern time.
Generally, shareholders whose purchase orders have been received by the fund
prior to 5:00 p.m. Eastern time and shareholders whose redemption proceeds have
not been wired to them on any business day are eligible to receive dividends on
that business day.  The dividend declared on any day preceding a non-business
day of the fund will include the income accrued on such non-business day.
Dividends and distributions are paid in cash unless the shareholder has elected
to have such dividends and distributions reinvested in the form of additional
full and fractional shares at net asset value.

Capital Gains Distributions

The fund generally distributes net realized capital gains (including net short-
term capital gains), if any, annually. The fund does not expect to realize any
long-term capital gains and losses.


                                       9
<PAGE>

FINANCIAL HIGHLIGHTS

The financial highlights table is intended to help you understand the financial
performance of the Cash Management Class.  Certain information reflects
financial results for a single fund share.

The total returns in the table represent the rate that an investor would have
earned (or lost) on an investment in the fund (assuming reinvestment of all
dividends and distributions).

This information has been audited by KPMG LLP, whose report, along with the
fund's financial statements, is included in the fund's annual report, which is
available upon request.

<TABLE>
<CAPTION>
                                                                                Cash Management Class
                                                               -----------------------------------------------------------
                                                                                                      For the Period
                                                                                                     January 17, 1996
                                                                                                         through
                                                                        Year Ended August 31,           August 31,
                                                                   1999        1998         1997           1996
                                                               -----------  ----------  -----------  ----------------
<S>                                                            <C>          <C>         <C>          <C>
Net asset value, beginning of period                               $1.00       $1.00        $1.00          $1.00
- -------------------------------------------------------------  -----------  ----------  -----------  ----------------
Income from investment operations:
  Net investment income                                             0.05        0.05         0.05           0.03
- -------------------------------------------------------------  -----------  ----------  -----------  ----------------
Less distributions:
  Dividends from net investment income                             (0.05)      (0.06)       (0.05)         (0.03)
- -------------------------------------------------------------  -----------  ----------  -----------  ----------------
Net asset value, end of period                                     $1.00       $1.00        $1.00          $1.00
- -------------------------------------------------------------  -----------  ----------  -----------  ----------------
Total return                                                        5.09%       5.66%        5.50%          3.32%
- -------------------------------------------------------------  -----------  ----------  -----------  ----------------
Ratios/supplemental data:
Net assets, end of period (000s omitted)                       $1,078,777    $655,975      $83,487       $53,209
- -------------------------------------------------------------  -----------  ----------  -----------  ----------------
Ratio of expenses to average net assets (a)                     0.17% (b)       0.16%        0.15%          0.10% (c)
- -------------------------------------------------------------  -----------  ----------  -----------  ----------------
Ratio of net investment income to average net assets (d)        4.94% (b)       5.51%        5.38%          5.27% (c)
- -------------------------------------------------------------  -----------  ----------  -----------  ----------------
</TABLE>

(a) After fee waivers and/or expense reimbursements. Ratios of expenses to
    average net assets prior to fee waivers and/or expense reimbursements were
    0.28%, 0.28%, 0.28%, and 0.34% (annualized) for the periods 1999-1995,
    respectively.
(b) Ratios based on average net assets of $942,340,346.
(c) Annualized.
(d) After fee waivers and/or expense reimbursements. Ratios of net investment
    income to average net assets prior to fee waivers and/or expense
    reimbursements were 4.83%, 5.39%, 5.25%, 5.03% (annualized) for the periods
    1999-1995, respectively.

                                       10
<PAGE>

SHAREHOLDER INFORMATION

The fund currently offers six classes of shares all of which share a common
investment objective and portfolio of investments.  The six classes differ only
with respect to distribution arrangements for different categories of investors.

DISTRIBUTION AND SERVICE (12b-1) FEES

The fund has adopted a 12b-1 plan with respect to the Cash Management Class that
allows the fund to pay distribution fees to Fund Management Company (the
distributor) for the sale and distribution of its shares and fees for services
provided to shareholders.  Because the fund pays these fees out of its assets on
an ongoing basis, over time these fees will increase the cost of your investment
and may cost you more than paying other types of sales charges.

PURCHASING SHARES

The minimum initial investment in the Cash Management Class is $1 million.  No
minimum amount is required for subsequent investments in the fund, nor are
minimum balances required.

Purchase orders will be accepted for execution on the day the order is placed,
provided that the order is properly submitted and received by the transfer agent
prior to 5:00 p.m. Eastern time on a business day of the fund. Purchase orders
received after such time will be processed at the next day's net asset value.
You may purchase shares by submitting an Account Application to the fund's
transfer agent, A I M Fund Services, Inc. (transfer agent) at P.O. Box 4497,
Houston, Texas 77210-4497 prior to your initial purchase of shares.  You must
open a fund account through an institution in accordance with procedures
established by such institution.  A purchase order is considered received at the
time The Bank of New York receives federal funds (member bank deposits with a
Federal Reserve Bank) for the order, provided the transfer agent has received
notice of the order or at the time the order is placed, if the fund is assured
of payment.  You may obtain an Account Application from the distributor.
Subsequent purchases of shares of the funds may also be made via AIM
LINK--Registered Trademark--Remote, a personal computer application
software product.

We may request that an institution maintain separate master accounts in the fund
for shares held by the institution (a) for its own account, for the account of
other institutions and for accounts for which the institution acts as a
fiduciary; and (b) for accounts for which the institution acts in some other
capacity.  An institution may aggregate its master accounts and subaccounts to
satisfy the minimum investment requirement.

If you propose to open a fund account with an institution, you should consult
with a representative of such institution to obtain a description of the rules
governing such an account.  A statement with regard to your investment in the
Cash Management Class is supplied periodically, and confirmations of all
transactions for your account are provided by the institution promptly upon
request.  In addition, proxies, periodic reports and other information from the
institution with regard to your shares of the Cash Management Class will be sent
to you.

You may place an order for the purchase of shares of the Cash Management Class
with the institution.  The institution is responsible for the prompt
transmission of the order to the transfer agent.  The fund is normally required
to make immediate settlement in federal funds for portfolio securities
purchased.  Accordingly, payment for shares of the Cash Management Class
purchased by institutions on behalf of their clients must be in federal funds.
If an order to purchase shares is paid for other than in federal funds, the
order may be delayed up to two business days while the institution completes the
conversion into federal funds.



                                       11
<PAGE>

REDEEMING SHARES

You may redeem any or all of your shares at the net asset value next determined
after receipt of a redemption request in proper form by the fund.  There is no
charge for redemption.  Redemption requests with respect to shares of the Cash
Management Class are normally made through a customer's institution.

You may request a redemption by calling the transfer agent at (800) 877-7745, or
by using Aim Link--Registered Trademark--Remote. payment for redeemed shares is
normally made by Federal Reserve wire to the commercial bank account designated
in your account application. You may also request that payment be made by check.
We use reasonable procedures to confirm that instructions communicated by
telephone are genuine and are not liable for telephone instructions that are
reasonably believed to be genuine. Such reasonable procedures may include
recordings of telephone transactions maintained for a reasonable period of time.

Payment for redemption orders received prior to 5:00 p.m. Eastern time will
normally be made on the same day. Payment for shares redeemed by mail and
payment for telephone redemptions in amounts of less than $1,000 may be made by
check mailed within seven days after receipt of the redemption request in proper
form.  The fund may make payment for telephone redemptions in excess of $1,000
by check when it is considered to be in the fund's best interest to do so.

Dividends payable up to the date of redemption on redeemed shares will normally
be paid by wire transfer on the next dividend payment date.  However, if all of
the shares in your account are redeemed, you will receive dividends payable up
to the date of redemption with the proceeds of the redemption.

THE FUND AND ITS AGENTS RESERVE THE RIGHT AT ANY TIME TO:
 . REJECT OR CANCEL ANY PART OF ANY PURCHASE ORDER;
 . MODIFY ANY TERMS OR CONDITIONS OF PURCHASE OF SHARES OF THE FUND; OR
 . WITHDRAW ALL OR ANY PART OF THE OFFERING MADE BY THIS PROSPECTUS.

PRICING OF SHARES

Determination of Net Asset Value

The price of each of the fund's shares is the fund's net asset value per share.
The fund determines the net asset value of its shares as of 5:00 p.m. Eastern
time on each day on which both the Federal Reserve Bank of New York and The Bank
of New York are open for business (business day).  The fund values portfolio
securities on the basis of amortized cost, which approximates market value.

Timing of Orders

The fund prices purchase and redemption orders at the net asset value calculated
after the transfer agent receives an order in good form.  If the transfer agent
receives a redemption request on a business day prior to 5:00 p.m. Eastern time,
the fund will normally wire redemption proceeds on that day.  If the transfer
agent receives a redemption request after 5:00 p.m. Eastern time, the redemption
will be processed at the net asset value next determined.  Shareholders will
accrue dividends until the day the fund wires redemption proceeds.  The fund may
postpone the right of redemption only under unusual circumstances, as allowed by
the Securities and Exchange Commission, such as when the New York Stock Exchange
restricts or suspends trading.  The fund reserves the right to change the time
for which purchase and redemption orders must be submitted to and received by
the transfer agent for execution on the same day on any day when the primary
government securities dealers are either closed for business or close early, or
trading in money market securities is limited due to national holidays.


                                       12
<PAGE>

TAXES

Dividends and distributions received by shareholders are taxable as ordinary
income or long-term capital gains for federal income tax purposes, whether
reinvested in additional shares or taken in cash.  Distributions are taxable at
different rates depending on the length of time the fund holds its assets.
Different tax rates apply to ordinary income and long-term capital gain
distributions regardless of how long shares are held.  Every year, information
will be sent showing the amount of dividends and distributions received from the
fund during the prior year.

Any long-term or short-term capital gains realized from redemptions of the
shares will be subject to federal income tax.

The foreign, state and local tax consequences of investing in the fund may
differ materially from the federal income tax consequences described above.
Shareholders should consult their tax advisor before investing.


                                       13
<PAGE>

                               [BACK COVER PAGE]

OBTAINING ADDITIONAL INFORMATION

More information may be obtained free of charge upon request.  The Statement of
Additional Information (SAI), a current version of which is on file with the
Securities and Exchange Commission (SEC), contains more details about the fund
and is incorporated by reference into the prospectus (is legally a part of this
prospectus).  Annual and semiannual reports to shareholders contain additional
information about the fund's investments.  The fund's annual report also
discusses the market conditions and investment strategies that significantly
affected the fund's performance during its last fiscal year.

If you have questions about this fund, another fund in The AIM Family of
Funds--Registered Trademark--or your account, or wish to obtain free copies
of the fund's current SAI or annual or semiannual reports, please contact us

BY MAIL:            AIM Fund Services, Inc.
                    P.O. Box 4497
                    Houston, TX 77210-4497

BY TELEPHONE:       (800) 877-7745

BY E-MAIL:          [email protected]

ON THE INTERNET:    http://www.aimfunds.com (prospectuses and annual and
                    semiannual reports only)

You also can review and obtain copies of the fund's SAI, reports and other
information at the SEC's Public Reference Room in Washington, DC; on the EDGAR
database on the SEC's Internet website (http://www.sec.gov); or, after paying a
duplication fee, by sending a letter to the SEC's Public Reference Section,
Washington, DC 20549-0102 or by sending an electronic mail request to
[email protected]. Please call the SEC at 1-202-942-8090 for information about
the Public Reference Room.


Liquid Assets Portfolio
SEC 1940 Act file number: 811-7892



                                Back Cover Page

<PAGE>

[AIM LOGO]


INSTITUTIONAL CLASS

LIQUID ASSETS PORTFOLIO
                                                PROSPECTUS
                                                DECEMBER 17, 1999



Liquid Assets Portfolio seeks to provide as high a level of current income as is
consistent with the preservation of capital and liquidity.

This prospectus contains important information about the Institutional Class of
the fund.  Please read it before investing and keep it for future reference.

As with all other mutual fund securities, the Securities and Exchange Commission
has not approved or disapproved these securities or determined whether the
information in this prospectus is adequate or accurate. Anyone who tells you
otherwise is committing a crime.



There can be no assurance that the fund will be able to maintain a stable net
asset value of $1.00 per share.

                                       1
<PAGE>


                               TABLE OF CONTENTS
<TABLE>
<CAPTION>

                                                                            Page
<S>                                                                         <C>
Investment Objective and Strategies........................................  3

Principal Risks of Investing in the Fund...................................  3

Performance Information....................................................  5
     Annual Total Returns..................................................  5
     Performance Table.....................................................  6

Fee Table and Expense Example..............................................  7
     Fee Table.............................................................  7
     Expense Example.......................................................  7

Fund Management............................................................  8
     The Advisor...........................................................  8
     Advisor Compensation..................................................  8

Other Information..........................................................  9
     Suitability for Investors.............................................  9
     Dividends and Distributions...........................................  9

Financial Highlights....................................................... 10

Shareholder Information.................................................... 11
     Purchasing Shares..................................................... 11
     Redeeming Shares...................................................... 11
     Pricing of Shares..................................................... 12
     Taxes................................................................. 13

Obtaining Additional Information.............................. Back Cover Page
</TABLE>






The AIM Family of Funds, The AIM Family of Funds and Design (i.e., the AIM
logo), AIM and Design, AIM, AIM LINK, AIM Institutional Funds, aimfunds.com, La
Familia AIM de Fondos, La Familia AIM de Fondos and Design and Invest with
Discipline are registered service marks and AIM Bank Connection, AIM Funds, AIM
Funds and Design, AIM Internet Connect and AIM Investor are service marks of
A I M Management Group Inc.

No dealer, salesperson or any other person has been authorized to give any
information or to make any representations other than those contained in this
prospectus, and you should not rely on such other information or
representations.

                                       2
<PAGE>

INVESTMENT OBJECTIVE AND STRATEGIES

The fund's investment objective is to provide as high a level of current income
as is consistent with the preservation of capital and liquidity.

The fund attempts to meet this objective by investing only in high-quality U.S.
dollar denominated short-term obligations, including:

 . securities issued by the U.S. government or its agencies;

 . bankers' acceptances, certificates of deposit and time deposits from banks;

 . repurchase agreements;

 . commercial paper;

 . taxable municipal securities; and

 . master notes.

The fund will maintain a weighted average maturity of 90 days or less. The fund
invests in compliance with Rule 2a-7 under the Investment Company Act of 1940.
The fund may invest up to 50% of its assets in U.S. dollar-denominated foreign
securities.

The portfolio managers focus on securities they believe have favorable prospects
for current income consistent with the preservation of capital and liquidity.
The portfolio managers usually hold portfolio securities to maturity, but may
sell a particular security when they deem it advisable, such as when any of the
factors above materially changes.

In anticipation of or in response to adverse market conditions, for cash
management purposes or for defensive purposes, the fund may temporarily hold all
or a portion of its assets in cash or shares of affiliated money market funds.
As a result, the fund may not achieve its investment objective.

PRINCIPAL RISKS OF INVESTING IN THE FUND

An investment in the fund is not a deposit of a bank and is not insured or
guaranteed by the Federal Deposit Insurance Corporation or any other government
agency. Although the fund seeks to preserve the value of your investment at
$1.00 per share, it is possible to lose money by investing in the fund.
Additionally, the fund's yield will vary as the short-term securities in its
portfolio mature and the proceeds are reinvested in securities with different
interest rates.

The following factors could reduce the fund's income and/or share price:

 . sharply rising interest rates;

 . downgrades of credit ratings or defaults of any of the fund's holdings; and

 . the risks generally associated with concentrating investments in the banking
  industry, such as interest rate risk, credit risk and regulatory developments
  relating to the banking and financial services industries.

If the seller of a repurchase agreement in which the fund invests defaults on
its obligation or declares bankruptcy, the fund may experience delays in selling
the securities underlying the repurchase agreement. As a result, the fund may
incur losses arising from a decline in the value of those securities, reduced
levels of income and expenses of enforcing its rights.

                                       3
<PAGE>

The value of your shares could be adversely affected if the computer systems
used by the fund's investment advisor and the fund's other service providers are
unable to distinguish the year 2000 from the year 1900.

The fund's investment advisor and independent technology consultants are working
to avoid year 2000-related problems in its systems and to obtain assurances that
other service providers are taking similar steps. Year 2000 problems may also
affect issuers in whose securities the fund invests.

                                       4
<PAGE>

PERFORMANCE INFORMATION

The bar chart and table shown below provide an indication of the risks of
investing in the fund. The fund's past performance is not necessarily an
indication of its future performance.

ANNUAL TOTAL RETURNS

The following bar chart shows changes in the performance of the Institutional
Class shares from year to year. The Institutional Class shares are not subject
to sales loads.

                                  [BAR CHART]

                              Institutional Class
Year     Return (%)
- ----     ----------
1994       4.37%
1995       6.08%
1996       5.52%
1997       5.67%
1998       5.61%

The Institutional Class shares' year-to-date total return as of September 30,
1999 was 3.79%.

During the periods shown in the bar chart, the highest quarterly return was
1.52% (quarter ended June 30, 1995) and the lowest quarterly return was 0.84%
(quarter ended March 31, 1994).

                                       5
<PAGE>

PERFORMANCE TABLE

The following performance table reflects the performance of Institutional Class
shares over the periods indicated.

<TABLE>
<CAPTION>
- --------------------------------------------------------------------------------------------
       Average Annual Total Returns                                       Since    Inception
(for the periods ended December 31, 1998)    1 Year  5 Years  10 Years  Inception    Date
- --------------------------------------------------------------------------------------------
<S>                                          <C>     <C>      <C>       <C>        <C>
Institutional Class                          5.61%    5.45%      --       5.39%    11/04/93
- -------------------------------------------------------------------------------------------
</TABLE>

Institutional Class shares' seven-day yield on December 31, 1998 was 5.10%. For
the current seven-day yield of Institutional Class shares, call (800) 659-1005.

                                       6
<PAGE>

FEE TABLE AND EXPENSE EXAMPLE

FEE TABLE

This table describes the fees and expenses that you may pay if you buy and hold
shares of the fund:

<TABLE>
<CAPTION>
                                                            Institutional Class
                                                            -------------------
<S>                                                         <C>
Shareholder Fees (fees paid directly from your investment)

  Maximum Sales Charge (Load) Imposed on Purchases
    (as a percentage of offering price)                            None
  Maximum Deferred Sales Charge (Load)
    (as a percentage of original purchase price
    or redemption proceeds, whichever is less)                     None

Annual Fund Operating Expenses (expenses that are deducted
  from fund assets)

  Management Fees(1)                                               0.15%
  Distribution and/or Service (12b-1) Fees                         None
  Other Expenses                                                   0.03
  Total Annual Fund Operating Expenses                             0.18
</TABLE>
(1)The investment advisor has voluntarily agreed to limit Management Fees to
   0.055%. This limitation can be terminated at any time. Total Annual Fund
   Operating Expenses, net of this voluntary limitation, are 0.09%.

You should also consider the effect of any account fees charged by the financial
institution managing the account.

EXPENSE EXAMPLE

This example is intended to help you compare the costs of investing in the
Institutional Class of the fund with the cost of investing in other mutual
funds.

The example assumes that you invest $10,000 in the fund for the time periods
indicated and then redeem all of your shares at the end of those periods. The
example also assumes that your investment has a 5% return each year and that the
fund's gross operating expenses remain the same. To the extent fees are waived
or expenses are reimbursed, the expenses will be lower. Although your actual
returns and costs may be higher or lower, based on these assumptions your costs
would be:

<TABLE>
<CAPTION>
                       1 Year    3 Years   5 Years    10 Years
                       ------    -------   -------    --------
<S>                    <C>       <C>       <C>        <C>
Institutional Class     $18        $58      $101        $230
</TABLE>

                                       7
<PAGE>

FUND MANAGEMENT

THE ADVISOR

A I M Advisors, Inc. (the advisor) serves as the fund's investment advisor and
is responsible for its day-to-day management. The advisor is located at 11
Greenway Plaza, Suite 100, Houston, Texas 77046-1173. The advisor supervises all
aspects of the fund's operations and provides investment advisory services to
the fund, including obtaining and evaluating economic, statistical and financial
information to formulate and implement investment programs for the fund.

The advisor has acted as an investment advisor since its organization in 1976.
Today, the advisor, together with its subsidiaries, advises or manages over 125
investment portfolios, including the fund, encompassing a broad range of
investment objectives.

ADVISOR COMPENSATION

During the fiscal year ended August 31, 1999, the advisor received compensation
of 0.06% of average daily net assets.

                                       8
<PAGE>

OTHER INFORMATION

SUITABILITY FOR INVESTORS

The Institutional Class of the fund is intended for use primarily by
institutions, particularly banks. Individuals, corporations, partnerships and
other businesses that maintain qualified accounts at an institution may invest
in shares of the Institutional Class through the institution, but may not
purchase shares directly. Each institution will render administrative support
services to its customers who are the beneficial owners of the shares of the
Institutional Class. Such services include, among other things, establishment
and maintenance of shareholder accounts and records; assistance in processing
purchase and redemption transactions in shares of the Institutional Class;
providing periodic statements showing a client's account balance in shares of
the Institutional Class; distribution of fund proxy statements, annual reports
and other communications to shareholders whose accounts are serviced by the
institution; and such other services as the fund may reasonably request.
Institutions will be required to certify to the fund that they comply with
applicable state law regarding registration as broker-dealers, or that they are
exempt from such registration.

The Institutional Class is designed to be a convenient and economical way in
which to invest short-term cash reserves in an open-end diversified money market
fund. It is anticipated that most investors will perform their own
subaccounting.

Investors in the Institutional Class have the opportunity to receive a somewhat
higher yield than might be obtainable through direct investment in money market
instruments, and enjoy the benefits of diversification, economies of scale and
same-day liquidity. Generally, higher interest rates can be obtained on the
purchase of very large blocks of money market instruments. Of course, any such
relative increase in interest rates may be offset to some extent by the
operating expenses of the Institutional Class.

DIVIDENDS AND DISTRIBUTIONS

Dividends

The fund generally declares dividends on each business day and pays dividends
monthly. A business day is any day on which both the Federal Reserve Bank of New
York and The Bank of New York, the fund's custodian, are open for business.

Dividends are paid on settled shares of the fund as of 5:00 p.m. Eastern time.
Generally, shareholders whose purchase orders have been received by the fund
prior to 5:00 p.m. Eastern time and shareholders whose redemption proceeds have
not been wired to them on any business day are eligible to receive dividends on
that business day. The dividend declared on any day preceding a non-business day
of the fund will include the income accrued on such non-business day. Dividends
and distributions are paid in cash unless the shareholder has elected to have
such dividends and distributions reinvested in the form of additional full and
fractional shares at net asset value.

Capital Gains Distributions

The fund generally distributes net realized capital gains (including net short-
term capital gains), if any, annually. The fund does not expect to realize any
long-term capital gains and losses.

                                       9
<PAGE>

FINANCIAL HIGHLIGHTS

The financial highlights table is intended to help you understand the financial
performance of the Institutional Class. Certain information reflects financial
results for a single fund share.

The total returns in the table represent the rate that an investor would have
earned (or lost) on an investment in the fund (assuming reinvestment of all
dividends and distributions).

This information has been audited by KPMG LLP, whose report, along with the
fund's financial statements, is included in the fund's annual report, which is
available upon request.


<TABLE>
<CAPTION>

                                                                                       Institutional Class
                                                              -------------------------------------------------------------------
                                                                                       Year Ended August 31,
                                                                 1999            1998        1997          1996           1995
                                                              ----------      ----------  -----------   -----------    ----------
<S>                                                           <C>             <C>          <C>          <C>           <C>
Net asset value, beginning of period                          $     1.00      $     1.00   $     1.00    $     1.00    $     1.00
- --------------------------------------------------------      ----------      ----------   ----------    ----------    ----------
Income from investment operations:
  Net investment income                                             0.05            0.06         0.05          0.06          0.06
- --------------------------------------------------------      ----------      ----------   ----------    ----------    ----------
Less distributions:
     Dividends from net investment income                          (0.05)          (0.06)       (0.05)        (0.06)        (0.06)
- --------------------------------------------------------      ----------      ----------   ----------    ----------    ----------
Net asset value, end of period                                $     1.00      $     1.00   $     1.00    $     1.00    $     1.00
- --------------------------------------------------------      ----------      ----------   ----------    ----------    ----------
Total return                                                        5.17%           5.74%        5.58%         5.68%         5.83%
- --------------------------------------------------------      ----------      ----------   ----------    ----------    ----------
Ratios/supplemental data:
Net assets, end of period (000s omitted)                      $4,541,935      $3,097,539   $3,787,357    $1,988,765    $1,287,463
- --------------------------------------------------------      ----------      ----------   ----------    ----------    ----------
Ratio of expenses to average net assets (a)                         0.09%(b)        0.08%        0.06%         0.03%         0.11%
- --------------------------------------------------------      ----------      ----------   ----------    ----------    ----------
Ratio of net investment income to average net assets (c)            5.02%(b)        5.59%        5.46%         5.52%         5.69%
- --------------------------------------------------------      ----------      ----------   ----------    ----------    ----------
</TABLE>

(a)   After fee waivers and/or expense reimbursements. Ratios of expenses to
      average net assets prior to fee waivers and/or expense reimbursements were
      0.18%, 0.18%, 0.18%, 0.18%, and 0.18% for the periods 1999-1995,
      respectively.
(b)   Ratios based on average net assets of $5,274,113,513.
(c)   After fee waivers and/or expense reimbursements. Ratios of net investment
      income to average net assets prior to fee waivers and/or expense
      reimbursements were 4.92%, 5.49%, 5.34%, 5.37% and 5.62% for the periods
      1999 - 1995, respectively.

                                      10
<PAGE>

SHAREHOLDER INFORMATION

The fund currently offers six classes of shares all of which share a common
investment objective and portfolio of investments. The six classes differ only
with respect to distribution arrangements for different categories of investors.

PURCHASING SHARES

The minimum initial investment in the Institutional Class is $10 million. No
minimum amount is required for subsequent investments in the fund, nor are
minimum balances required.

Purchase orders will be accepted for execution on the day the order is placed,
provided that the order is properly submitted and received by the transfer agent
prior to 5:00 p.m. Eastern time on a business day of the fund. Purchase orders
received after such time will be processed at the next day's net asset value.
You may purchase shares by submitting an Account Application to the fund's
transfer agent, A I M Fund Services, Inc. (transfer agent) at P.O. Box 4497,
Houston, Texas 77210-4497 prior to your initial purchase of shares. You must
open a fund account through an institution in accordance with procedures
established by such institution. A purchase order is considered received at the
time The Bank of New York receives federal funds (member bank deposits with a
Federal Reserve Bank) for the order, provided the transfer agent has received
notice of the order or at the time the order is placed, if the fund is assured
of payment. You may obtain an Account Application from Fund Management Company
(the distributor). Subsequent purchases of shares of the funds may also be made
via AIM LINK--Registered Trademark--Remote, a personal computer application
software product.

We may request that an institution maintain separate master accounts in the fund
for shares held by the institution (a) for its own account, for the account of
other institutions and for accounts for which the institution acts as a
fiduciary; and (b) for accounts for which the institution acts in some other
capacity. An institution may aggregate its master accounts and subaccounts to
satisfy the minimum investment requirement.

If you propose to open a fund account with an institution, you should consult
with a representative of such institution to obtain a description of the rules
governing such an account. A statement with regard to your investment in the
Institutional Class is supplied periodically, and confirmations of all
transactions for your account are provided by the institution promptly upon
request. In addition, proxies, periodic reports and other information from the
institution with regard to your shares of the Institutional Class will be sent
to you.

You may place an order for the purchase of shares of the Institutional Class
with the institution. The institution is responsible for the prompt transmission
of the order to the transfer agent. The fund is normally required to make
immediate settlement in federal funds for portfolio securities purchased.
Accordingly, payment for shares of the Institutional Class purchased by
institutions on behalf of their clients must be in federal funds. If an order to
purchase shares is paid for other than in federal funds, the order may be
delayed up to two business days while the institution completes the conversion
into federal funds.

REDEEMING SHARES

You may redeem any or all of your shares at the net asset value next determined
after receipt of a redemption request in proper form by the fund. There is no
charge for redemption. Redemption requests with respect to shares of the
Institutional Class are normally made through a customer's institution.

You may request a redemption by calling the transfer agent at (800) 659-1005, or
by using AIM LINK--Registered Trademark--Remote. Payment for redeemed shares is
normally made by Federal Reserve wire to the commercial bank account designated
in your Account Application. You may also request that payment be made by check.
We use reasonable procedures to confirm that instructions communicated by
telephone are genuine and are not

                                      11
<PAGE>

liable for telephone instructions that are reasonably believed to be genuine.
Such reasonable procedures may include recordings of telephone transactions
maintained for a reasonable period of time.

Payment for redemption orders received prior to 5:00 p.m. Eastern time will
normally be made on the same day. Payment for shares redeemed by mail and
payment for telephone redemptions in amounts of less than $1,000 may be made by
check mailed within seven days after receipt of the redemption request in proper
form. The fund may make payment for telephone redemptions in excess of $1,000 by
check when it is considered to be in the fund's best interest to do so.

Dividends payable up to the date of redemption on redeemed shares will normally
be paid by wire transfer on the next dividend payment date. However, if all of
the shares in your account are redeemed, you will receive dividends payable up
to the date of redemption with the proceeds of the redemption.

THE FUND AND ITS AGENTS RESERVE THE RIGHT AT ANY TIME TO:
 . REJECT OR CANCEL ANY PART OF ANY PURCHASE ORDER;
 . MODIFY ANY TERMS OR CONDITIONS OF PURCHASE OF SHARES OF THE FUND; OR
 . WITHDRAW ALL OR ANY PART OF THE OFFERING MADE BY THIS PROSPECTUS.

PRICING OF SHARES

Determination of Net Asset Value

The price of each of the fund's shares is the fund's net asset value per share.
The fund determines the net asset value of its shares as of 5:00 p.m. Eastern
time on each day on which both the Federal Reserve Bank of New York and The Bank
of New York are open for business (business day).  The fund values portfolio
securities on the basis of amortized cost, which approximates market value.

Timing of Orders

The fund prices purchase and redemption orders at the net asset value calculated
after the transfer agent receives an order in good form.  If the transfer agent
receives a redemption request on a business day prior to 5:00 p.m. Eastern time,
the fund will normally wire redemption proceeds on that day.  If the transfer
agent receives a redemption request after 5:00 p.m. Eastern time, the redemption
will be processed at the net asset value next determined.  Shareholders will
accrue dividends until the day the fund wires redemption proceeds.  The fund may
postpone the right of redemption only under unusual circumstances, as allowed by
the Securities and Exchange Commission, such as when the New York Stock Exchange
restricts or suspends trading.  The fund reserves the right to change the time
for which purchase and redemption orders must be submitted to and received by
the transfer agent for execution on the same day on any day when the primary
government securities dealers are either closed for business or close early, or
trading in money market securities is limited due to national holidays.

                                      12
<PAGE>

TAXES

Dividends and distributions received by shareholders are taxable as ordinary
income [or long-term capital gains] for federal income tax purposes, whether
reinvested in additional shares or taken in cash. Distributions are taxable at
different rates depending on the length of time the fund holds its assets.
[Different tax rates apply to ordinary income and long-term capital gain,
distributions regardless of how long shares are held.] Every year, information
will be sent showing the amount of dividends and distributions received from the
fund during the prior year.

[Any long-term or short-term capital gains realized from redemptions of the
shares will be subject to federal income tax.]

The foreign, state and local tax consequences of investing in the fund may
differ materially from the federal income tax consequences described above.
Shareholders should consult their tax advisor before investing.

                                      13
<PAGE>

                               [BACK COVER PAGE]

OBTAINING ADDITIONAL INFORMATION

More information may be obtained free of charge upon request. The Statement of
Additional Information (SAI), a current version of which is on file with the
Securities and Exchange Commission (SEC), contains more details about the fund
and is incorporated by reference into the prospectus (is legally a part of this
prospectus). Annual and semiannual reports to shareholders contain additional
information about the fund's investments. The fund's annual report also
discusses the market conditions and investment strategies that significantly
affected the fund's performance during its last fiscal year.

If you have questions about this fund, another fund in The AIM Family of
Funds--Registered Trademark--or your account, or wish to obtain free copies of
the fund's current SAI or annual or semiannual reports, please contact us

BY MAIL:          A I M Fund Services, Inc.
                  P.O. Box 4497
                  Houston, TX 77210-4497

BY TELEPHONE:     (800) 659-1005

BY E-MAIL:        [email protected]

ON THE INTERNET:  http://www.aimfunds.com (prospectuses and annual and
                  semiannual reports only)

You also can review and obtain copies of the fund's SAI, reports and other
information at the SEC's Public Reference Room in Washington, DC; on the EDGAR
database on the SEC's Internet website (http://www.sec.gov); or, after paying a
duplication fee, by sending a letter to the SEC's Public Reference Section,
Washington, DC 20549-0102 or by sending an electronic mail request to
[email protected]. Please call the SEC at 1-202-942-8090 for information about
the Public Reference Room.


Liquid Assets Portfolio
SEC 1940 Act file number: 811-7892



                                Back Cover Page

<PAGE>

[AIM LOGO]

PERSONAL INVESTMENT CLASS

LIQUID ASSETS PORTFOLIO
                                                               PROSPECTUS
                                                               DECEMBER 17, 1999



Liquid Assets Portfolio seeks to provide as high a level of current income as is
consistent with the preservation of capital and liquidity.

This prospectus contains important information about the Personal Investment
Class of the fund. Please read it before investing and keep it for future
reference.

As with all other mutual fund securities, the Securities and Exchange Commission
has not approved or disapproved these securities or determined whether the
information in this prospectus is adequate or accurate. Anyone who tells you
otherwise is committing a crime.


There can be no assurance that the fund will be able to maintain a stable net
asset value of $1.00 per share.



                                       1
<PAGE>

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                        Page

<S>                                                      <C>
Investment Objective and Strategies.....................  3

Principal Risks of Investing in the Fund................  3

Performance Information.................................  5
     Annual Total Returns...............................  5
     Performance Table..................................  6

Fee Table and Expense Example...........................  7
     Fee Table..........................................  7
     Expense Example....................................  7

Fund Management.........................................  8
     The Advisor........................................  8
     Advisor Compensation...............................  8

Other Information.......................................  9
     Suitability for Investors..........................  9
     Dividends and Distributions........................  9

Financial Highlights.................................... 10

Shareholder Information................................. 11
     Distribution and Service (12b-1) Fees.............. 11
     Purchasing Shares.................................. 11
     Redeeming Shares................................... 12
     Pricing of Shares.................................. 12
     Taxes.............................................. 13

Obtaining Additional Information............ Back Cover Page
</TABLE>

The AIM Family of Funds, The AIM Family of Funds and Design (i.e., the AIM
logo), AIM and Design, AIM, AIM LINK, AIM Institutional Funds, aimfunds.com, La
Familia AIM de Fondos, La Familia AIM de Fondos and Design and Invest with
Discipline are registered service marks and AIM Bank Connection, AIM Funds, AIM
Funds and Design, AIM Internet Connect and AIM Investor are service marks of
A I M Management Group Inc.

No dealer, salesperson or any other person has been authorized to give any
information or to make any representations other than those contained in this
prospectus, and you should not rely on such other information or
representations.

                                       2
<PAGE>

INVESTMENT OBJECTIVE AND STRATEGIES

The fund's investment objective is to provide as high a level of current income
as is consistent with the preservation of capital and liquidity.

The fund attempts to meet this objective by investing only in high-quality U.S.
dollar denominated short-term obligations, including:

 . securities issued by the U.S. government or its agencies;

 . bankers' acceptances, certificates of deposit and time deposits from banks;

 . repurchase agreements;

 . commercial paper;

 . taxable municipal securities; and

 . master notes.

The fund will maintain a weighted average maturity of 90 days or less. The fund
invests in compliance with Rule 2a-7 under the Investment Company Act of 1940.
The fund may invest up to 50% of its assets in U.S. dollar-denominated foreign
securities.

The portfolio managers focus on securities they believe have favorable prospects
for current income consistent with the preservation of capital and liquidity.
The portfolio managers usually hold portfolio securities to maturity, but may
sell a particular security when they deem it advisable, such as when any of the
factors above materially changes.

In anticipation of or in response to adverse market conditions, for cash
management purposes or for defensive purposes, the fund may temporarily hold all
or a portion of its assets in cash or shares of affiliated money market funds.
As a result, the fund may not achieve its investment objective.

PRINCIPAL RISKS OF INVESTING IN THE FUND

An investment in the fund is not a deposit of a bank and is not insured or
guaranteed by the Federal Deposit Insurance Corporation or any other government
agency. Although the fund seeks to preserve the value of your investment at
$1.00 per share, it is possible to lose money by investing in the fund.
Additionally, the fund's yield will vary as the short-term securities in its
portfolio mature and the proceeds are reinvested in securities with different
interest rates.

The following factors could reduce the fund's income and/or share price:

 . sharply rising interest rates;

 . downgrades of credit ratings or defaults of any of the fund's holdings; and

 . the risks generally associated with concentrating investments in the banking
  industry, such as interest rate risk, credit risk and regulatory developments
  relating to the banking and financial services industries.

If the seller of a repurchase agreement in which the fund invests defaults on
its obligation or declares bankruptcy, the fund may experience delays in selling
the securities underlying the repurchase agreement. As a result, the fund may
incur losses arising from a decline in the value of those securities, reduced
levels of income and expenses of enforcing its rights.




                                       3
<PAGE>

The value of your shares could be adversely affected if the computer systems
used by the fund's investment advisor and the fund's other service providers are
unable to distinguish the year 2000 from the year 1900.

The fund's investment advisor and independent technology consultants are working
to avoid year 2000-related problems in its systems and to obtain assurances that
other service providers are taking similar steps. Year 2000 problems may also
affect issuers in whose securities the fund invests.


                                       4
<PAGE>

PERFORMANCE INFORMATION

The bar chart and table shown below provide an indication of the risks of
investing in the fund. The fund's past performance is not necessarily an
indication of its future performance.

ANNUAL TOTAL RETURNS

The following bar chart shows changes in the performance of the Institutional
Class shares from year to year. Neither the Personal Investment Class shares nor
the Institutional Class shares are subject to sales loads.

[GRAPH APPEARS HERE]
                              Institutional Class

Year   Return (%)

1994     4.37%
1995     6.08%
1996     5.52%
1997     5.67%
1998     5.61%

The returns are those of the fund's Institutional Class shares, which are not
offered in this prospectus. Personal Investment Class shares would have
substantially similar annual returns because the shares are invested in the same
portfolio of securities, but would be lower to the extent that the classes have
different expenses.

The Institutional Class shares' year-to-date total return as of September 30,
1999 was 3.79%.

During the periods shown in the bar chart, Institutional Class' highest
quarterly return was 1.52% (quarter ended June 30, 1995) and the lowest
quarterly return was 0.84% (quarter ended March 31, 1994).


                                       5
<PAGE>

PERFORMANCE TABLE

The following performance table reflects the performance of Institutional Class
shares over the periods indicated.

<TABLE>
<CAPTION>
=======================================================================================================
  Average Annual Total Returns
(for the periods ended December 31, 1998)                                         Since     Inception
                                            1 Year       5 Years     10 Years    Inception     Date
- -------------------------------------------------------------------------------------------------------
<S>                                         <C>           <C>          <C>        <C>       <C>
Institutional Class                          5.61%         5.45%          --       5.39%     11/04/93
- -------------------------------------------------------------------------------------------------------
Personal Investment Class                      --            --           --         --      01/04/99
=======================================================================================================
</TABLE>

For the current seven-day yield of Personal Investment Class shares, call (800)
877-4744.


                                       6
<PAGE>

FEE TABLE AND EXPENSE EXAMPLE

FEE TABLE

This table describes the fees and expenses that you may pay if you buy and hold
shares of the fund:
<TABLE>
<CAPTION>

                                                                Personal Investment Class
                                                                -------------------------
<S>                                                              <C>
Shareholder Fees (fees paid directly from your investment)

  Maximum Sales Charge (Load) Imposed on Purchases
    (as a percentage of offering price)                                    None

  Maximum Deferred Sales Charge (Load)
    (as a percentage of original purchase price
    or redemption proceeds, whichever is less)                             None

Annual Fund Operating Expenses (expenses that are deducted
  from fund assets)

  Management Fees(1)                                                       0.15%
  Distribution and/or Service (12b-1) Fees                                 0.75
  Other Expenses                                                           0.03
  Total Annual Fund Operating Expenses                                     0.93
  Fee Waiver(2)                                                            0.25
  Net Expenses                                                             0.68
- ---------------------------------------
</TABLE>
(1) The investment advisor has voluntarily agreed to limit Management Fees to
0.055%. This limitation can be terminated at any time. Total Annual Fund
Operating Expenses, net of this voluntary limitation, are 0.59%.

(2) The distributor has contractually agreed to waive 0.25% of the Rule 12b-1
distribution plan fee.

As a result of 12b-1 fees, long-term shareholders in the fund may pay more than
the maximum permitted initial sales charge.

You should also consider the effect of any account fees charged by the financial
institution managing the account.

EXPENSE EXAMPLE

This example is intended to help you compare the costs of investing in the
Personal Investment Class of the fund with the cost of investing in other mutual
funds.

The example assumes that you invest $10,000 in the fund for the time periods
indicated and then redeem all of your shares at the end of those periods. The
example also assumes that your investment has a 5% return each year and that the
fund's gross operating expenses remain the same. To the extent fees are waived
or expenses are reimbursed, the expenses will be lower. Although your actual
returns and costs may be higher or lower, based on these assumptions your costs
would be:

                           1 Year  3 Years
                           ------  -------

Personal Investment Class    $95    $296

                                       7
<PAGE>

FUND MANAGEMENT

THE ADVISOR

A I M Advisors, Inc. (the advisor) serves as the fund's investment advisor and
is responsible for its day-to-day management. The advisor is located at 11
Greenway Plaza, Suite 100, Houston, Texas 77046-1173. The advisor supervises all
aspects of the fund's operations and provides investment advisory services to
the fund, including obtaining and evaluating economic, statistical and financial
information to formulate and implement investment programs for the fund.

The advisor has acted as an investment advisor since its organization in 1976.
Today, the advisor, together with its subsidiaries, advises or manages over 125
investment portfolios, including the fund, encompassing a broad range of
investment objectives.

ADVISOR COMPENSATION

During the fiscal year ended August 31, 1999, the advisor received compensation
of 0.06% of average daily net assets.

                                       8
<PAGE>

OTHER INFORMATION

SUITABILITY FOR INVESTORS

The Personal Investment Class of the fund is intended for use primarily by
institutional customers of banks, certain broker-dealers and other financial
institutions (institutions). Individuals, corporations, partnerships and other
businesses that maintain qualified accounts at an institution may invest in
shares of the Personal Investment Class through the institution, but may not
purchase shares directly. Each institution will render administrative support
services to its customers who are the beneficial owners of the shares of the
Personal Investment Class. Such services include, among other things,
establishment and maintenance of shareholder accounts and records; assistance in
processing purchase and redemption transactions in shares of the Personal
Investment Class; providing periodic statements showing a client's account
balance in shares of the Personal Investment Class; distribution of fund proxy
statements, annual reports and other communications to shareholders whose
accounts are serviced by the institution; and such other services as the fund
may reasonably request. Institutions will be required to certify to the fund
that they comply with applicable state law regarding registration as broker-
dealers, or that they are exempt from such registration.

The Personal Investment Class is designed to be a convenient and economical way
to invest in an open-end diversified money market fund. It is anticipated that
most investors will perform their own subaccounting.

Investors in the Personal Investment Class have the opportunity to receive a
somewhat higher yield than might be obtainable through direct investment in
money market instruments, and enjoy the benefits of diversification, economies
of scale and same-day liquidity. Generally, higher interest rates can be
obtained on the purchase of very large blocks of money market instruments. Of
course, any such relative increase in interest rates may be offset to some
extent by the operating expenses of the Personal Investment Class.

DIVIDENDS AND DISTRIBUTIONS

Dividends

The fund generally declares dividends on each business day and pays dividends
monthly. A business day is any day on which both the Federal Reserve Bank of New
York and The Bank of New York, the fund's custodian, are open for business.

Dividends are paid on settled shares of the fund as of 5:00 p.m. Eastern time.
Generally, shareholders whose purchase orders have been received by the fund
prior to 5:00 p.m. Eastern time and shareholders whose redemption proceeds have
not been wired to them on any business day are eligible to receive dividends on
that business day. The dividend declared on any day preceding a non-business day
of the fund will include the income accrued on such non-business day. Dividends
and distributions are paid in cash unless the shareholder has elected to have
such dividends and distributions reinvested in the form of additional full and
fractional shares at net asset value.

Capital Gains Distributions

The fund generally distributes net realized capital gains (including net short-
term capital gains), if any, annually. The fund does not expect to realize any
long-term capital gains and losses.

                                       9
<PAGE>

FINANCIAL HIGHLIGHTS

The financial highlights table is intended to help you understand the financial
performance of the Personal Investment Class. Certain information reflects
financial results for a single fund share.

The total returns in the table represent the rate that an investor would have
earned (or lost) on an investment in the fund (assuming reinvestment of all
dividends and distributions).

This information has been audited by KPMG LLP, whose report, along with the
fund's financial statements, is included in the fund's annual report, which is
available upon request.
<TABLE>
<CAPTION>

                                                       Personal Investment Class
                                                       -------------------------
                                                             For the Period
                                                             June 22, 1999
                                                                 through
                                                                August 31,
                                                                  1999
                                                       -------------------------
<S>                                                    <C>
Net asset value, beginning of period                              $1.00
- -----------------------------------------------------  -------------------------
Income from investment operations:
  Net investment income                                            0.01
- -----------------------------------------------------  -------------------------
  Less distributions:
    Dividends from net investment income                          (0.01)
- -----------------------------------------------------  -------------------------
Net asset value, end of period                                    $1.00
- -----------------------------------------------------  -------------------------
Total return (a)                                                   1.15%
- -----------------------------------------------------  -------------------------
Ratios/supplemental data:
Net assets, end of period (000s omitted)                           $994
- -----------------------------------------------------  -------------------------
Ratio of expenses to average net assets (b)                        0.59% (c)
- -----------------------------------------------------  -------------------------
Ratio of net investment income to average net
 assets (d)                                                        4.52% (c)
- -----------------------------------------------------  -------------------------
</TABLE>
(a) Not annualized for periods less than one year.
(b) After fee waivers and/or expense reimbursements. Ratios of expenses to
    average net assets prior to fee waivers and/or expense reimbursements was
    0.93% (annualized).
(c) Ratios are annualized and based on average net assets of $418,310.
(d) After fee waivers and/or expense reimbursements. Ratios of net investment
    income to average net assets prior to fee waivers and/or expense
    reimbursements was 4.17% (annualized).

                                       10

<PAGE>

SHAREHOLDER INFORMATION

The fund currently offers six classes of shares all of which share a common
investment objective and portfolio of investments. The six classes differ only
with respect to distribution arrangements for different categories of investors.

DISTRIBUTION AND SERVICE (12b-1) FEES

The fund has adopted a 12b-1 plan with respect to the Personal Investment Class
that allows the fund to pay distribution fees to Fund Management Company (the
distributor) for the sale and distribution of its shares and fees for services
provided to shareholders. Because the fund pays these fees out of its assets on
an ongoing basis, over time these fees will increase the cost of your investment
and may cost you more than paying other types of sales charges.

PURCHASING SHARES

The minimum initial investment in the Personal Investment Class is $1,000. No
minimum amount is required for subsequent investments in the fund, nor are
minimum balances required.

Purchase orders will be accepted for execution on the day the order is placed,
provided that the order is properly submitted and received by the transfer agent
prior to 5:00 p.m. Eastern time on a business day of the fund. Purchase orders
received after such time will be processed at the next day's net asset value.
You may purchase shares by submitting an Account Application to the fund's
transfer agent, A I M Fund Services, Inc. (transfer agent) at P.O. Box 4497,
Houston, Texas 77210-4497 prior to your initial purchase of shares. You must
open a fund account through an institution in accordance with procedures
established by such institution. A purchase order is considered received at the
time The Bank of New York receives federal funds (member bank deposits with a
Federal Reserve Bank) for the order, provided the transfer agent has received
notice of the order or at the time the order is placed, if the fund is assured
of payment. You may obtain an Account Application from the distributor.
Subsequent purchases of shares of the funds may also be made via AIM
LINK--Registered Trademark--Remote, a personal computer application software
product.

We may request that an institution maintain separate master accounts in the
fund for shares held by the institution (a) for its own account, for the account
of other institutions and for accounts for which the institution acts as a
fiduciary; and (b) for accounts for which the institution acts in some other
capacity. An institution may aggregate its master accounts and subaccounts to
satisfy the minimum investment requirement.

If you propose to open a fund account with an institution, you should consult
with a representative of such institution to obtain a description of the rules
governing such an account. A statement with regard to your investment in the
Personal Investment Class is supplied periodically, and confirmations of all
transactions for your account are provided by the institution promptly upon
request. In addition, proxies, periodic reports and other information from the
institution with regard to your shares of the Personal Investment Class will be
sent to you.

You may place an order for the purchase of shares of the Personal Investment
Class with the institution. The institution is responsible for the prompt
transmission of the order to the transfer agent. The fund is normally required
to make immediate settlement in federal funds for portfolio securities
purchased. Accordingly, payment for shares of the Personal Investment Class
purchased by institutions on behalf of their clients must be in federal funds.
If an order to purchase shares is paid for other than in federal funds, the
order may be delayed up to two business days while the institution completes the
conversion into federal funds.

                                       11
<PAGE>

REDEEMING SHARES

You may redeem any or all of your shares at the net asset value next determined
after receipt of a redemption request in proper form by the fund. There is no
charge for redemption. Redemption requests with respect to shares of the
Personal Investment Class are normally made through a customer's institution.

You may request a redemption by calling the transfer agent at (800) 877-4744, or
by using AIM LINK--Registered Trademark--Remote. Payment for redeemed shares is
normally made by Federal Reserve wire to the commercial bank account designated
in your Account Application. You may also request that payment be made by check.
We use reasonable procedures to confirm that instructions communicated by
telephone are genuine and are not liable for telephone instructions that are
reasonably believed to be genuine. Such reasonable procedures may include
recordings of telephone transactions maintained for a reasonable period of time.

Payment for redemption orders received prior to 5:00 p.m. Eastern time will
normally be made on the same day. Payment for shares redeemed by mail and
payment for telephone redemptions in amounts of less than $1,000 may be made by
check mailed within seven days after receipt of the redemption request in proper
form. The fund may make payment for telephone redemptions in excess of $1,000 by
check when it is considered to be in the fund's best interest to do so.

Dividends payable up to the date of redemption on redeemed shares will normally
be paid by wire transfer on the next dividend payment date. However, if all of
the shares in your account are redeemed, you will receive dividends payable up
to the date of redemption with the proceeds of the redemption.

THE FUND AND ITS AGENTS RESERVE THE RIGHT AT ANY TIME TO:
 . REJECT OR CANCEL ANY PART OF ANY PURCHASE ORDER;
 . MODIFY ANY TERMS OR CONDITIONS OF PURCHASE OF SHARES OF THE FUND; OR
 . WITHDRAW ALL OR ANY PART OF THE OFFERING MADE BY THIS PROSPECTUS.

PRICING OF SHARES

Determination of Net Asset Value

The price of each of the fund's shares is the fund's net asset value per share.
The fund determines the net asset value of its shares as of 5:00 p.m. Eastern
time on each day on which both the Federal Reserve Bank of New York and The Bank
of New York are open for business (business day). The fund values portfolio
securities on the basis of amortized cost, which approximates market value.

Timing of Orders

The fund prices purchase and redemption orders at the net asset value calculated
after the transfer agent receives an order in good form. If the transfer agent
receives a redemption request on a business day prior to 5:00 p.m. Eastern time,
the fund will normally wire redemption proceeds on that day. If the transfer
agent receives a redemption request after 5:00 p.m. Eastern time, the redemption
will be processed at the net asset value next determined. Shareholders will
accrue dividends until the day the fund wires redemption proceeds. The fund may
postpone the right of redemption only under unusual circumstances, as allowed by
the Securities and Exchange Commission, such as when the New York Stock Exchange
restricts or suspends trading. The fund reserves the right to change the time
for which purchase and redemption orders must be submitted to and received by
the transfer agent for execution on the same day on any day when the primary
government securities dealers are either closed for business or close early, or
trading in money market securities is limited due to national holidays.

                                      12
<PAGE>

TAXES

Dividends and distributions received are taxable as ordinary income [or long-
term capital gains] for federal income tax purposes, whether reinvested in
additional shares or taken in cash. Distributions are taxable at different rates
depending on the length of time the fund holds its assets. [Different tax rates
apply to ordinary income and long-term capital gain, distributions regardless of
how long shares are held.] Every year, information will be sent showing the
amount of dividends and distributions received from the fund during the prior
year.

[Any long-term or short-term capital gains realized from redemptions of the
shares will be subject to federal income tax.]

The foreign, state and local tax consequences of investing in the fund may
differ materially from the federal income tax consequences described above.
Shareholders should consult their tax advisor before investing.

                                      13
<PAGE>

                              [BACK COVER PAGE]

OBTAINING ADDITIONAL INFORMATION

More information may be obtained free of charge upon request. The Statement of
Additional Information (SAI), a current version of which is on file with the
Securities and Exchange Commission (SEC), contains more details about the fund
and is incorporated by reference into the prospectus (is legally a part of this
prospectus). Annual and semiannual reports to shareholders contain additional
information about the fund's investments. The fund's annual report also
discusses the market conditions and investment strategies that significantly
affected the fund's performance during its last fiscal year.

If you have questions about this fund, another fund in The AIM Family of
Funds--Registered Trademark--or your account, or wish to obtain free copies of
the fund's current SAI or annual or semiannual reports, please contact us

BY MAIL:          A I M Fund Services, Inc.
                  P. O. Box 4497
                  Houston, TX 77210-4497

BY TELEPHONE:     (800) 877-4744

BY E-MAIL:        [email protected]

ON THE INTERNET:  http://www.aimfunds.com (prospectuses and annual and
                  semiannual reports only)

You also can review and obtain copies of the fund's SAI, reports and other
information at the SEC's Public Reference Room in Washington, DC; on the EDGAR
database on the SEC's Internet website (http://www.sec.gov); or, after paying a
duplication fee, by sending a letter to the SEC's Public Reference Section,
Washington, DC 20549-0102 or by sending an electronic mail request to
[email protected]. Please call the SEC at 1-202-942-8090 for information about
the Public Reference Room.

Liquid Assets Portfolio
SEC 1940 Act file number: 811-7892

                                Back Cover Page
<PAGE>

[AIM LOGO]


PRIVATE INVESTMENT CLASS

LIQUID ASSETS PORTFOLIO
                                                PROSPECTUS
                                                DECEMBER 17, 1999



Liquid Assets Portfolio seeks to provide as high a level of current income as is
consistent with the preservation of capital and liquidity.

This prospectus contains important information about the Private Investment
Class of the fund.  Please read it before investing and keep it for future
reference.

As with all other mutual fund securities, the Securities and Exchange Commission
has not approved or disapproved these securities or determined whether the
information in this prospectus is adequate or accurate. Anyone who tells you
otherwise is committing a crime.

There can be no assurance that the fund will be able to maintain a stable net
asset value of $1.00 per share.


                                       1
<PAGE>

                               TABLE OF CONTENTS
<TABLE>
<CAPTION>
                                           Page

<S>                                         <C>
Investment Objective and Strategies.......   3

Principal Risks of Investing in the Fund..   3

Performance Information..................    5
  Annual Total Returns...................    5
  Performance Table......................    6

Fee Table and Expense Example............    7
  Fee Table..............................    7
  Expense Example........................    7

Fund Management..........................    8
  The Advisor............................    8
  Advisor Compensation...................    8

Other Information........................    9
  Suitability for Investors..............    9
  Dividends and Distributions............    9

Financial Highlights.....................   10

Shareholder Information..................   11
  Distribution and Service (12b-1) Fees..   11
  Purchasing Shares......................   11
  Redeeming Shares.......................   12
  Pricing of Shares......................   12
  Taxes..................................   13
</TABLE>
Obtaining Additional Information.........  Back Cover Page



The AIM Family of Funds, The AIM Family of Funds and Design (i.e., the AIM
logo), AIM and Design, AIM, AIM LINK, AIM Institutional Funds, aimfunds.com, La
Familia AIM de Fondos, La Familia AIM de Fondos and Design and Invest with
Discipline are registered service marks and AIM Bank Connection, AIM Funds, AIM
Funds and Design, AIM Internet Connect and AIM Investor are service marks of
A I M Management Group Inc.

No dealer, salesperson or any other person has been authorized to give any
information or to make any representations other than those contained in this
prospectus, and you should not rely on such other information or
representations.


                                       2
<PAGE>

INVESTMENT OBJECTIVE AND STRATEGIES

The fund's investment objective is to provide as high a level of current income
as is consistent with the preservation of capital and liquidity.

The fund attempts to meet this objective by investing only in high-quality U.S.
dollar denominated short-term obligations, including:

 .securities issued by the U.S. government or its agencies;

 .bankers' acceptances, certificates of deposit and time deposits from banks;

 .repurchase agreements;

 .commercial paper;

 .taxable municipal securities; and

 .master notes.

The fund will maintain a weighted average maturity of 90 days or less.  The fund
invests in compliance with Rule 2a-7 under the Investment Company Act of 1940.
The fund may invest up to 50% of its assets in U.S. dollar-denominated foreign
securities.

The portfolio managers focus on securities they believe have favorable prospects
for current income consistent with the preservation of capital and liquidity.
The portfolio managers usually hold portfolio securities to maturity, but may
sell a particular security when they deem it advisable, such as when any of the
factors above materially changes.

In anticipation of or in response to adverse market conditions, for cash
management purposes or for defensive purposes, the fund may temporarily hold all
or a portion of its assets in cash or shares of affiliated money market funds.
As a result, the fund may not achieve its investment objective.

PRINCIPAL RISKS OF INVESTING IN THE FUND

An investment in the fund is not a deposit of a bank and is not insured or
guaranteed by the Federal Deposit Insurance Corporation or any other government
agency. Although the fund seeks to preserve the value of your investment at
$1.00 per share, it is possible to lose money by investing in the fund.
Additionally, the fund's yield will vary as the short-term securities in its
portfolio mature and the proceeds are reinvested in securities with different
interest rates.

The following factors could reduce the fund's income and/or share price:

 .sharply rising interest rates;

 .downgrades of credit ratings or defaults of any of the fund's holdings; and

 .the risks generally associated with concentrating investments in the banking
 industry, such as interest rate risk, credit risk and regulatory developments
 relating to the banking and financial services industries.

If the seller of a repurchase agreement in which the fund invests defaults on
its obligation or declares bankruptcy, the fund may experience delays in selling
the securities underlying the repurchase agreement. As a result, the fund may
incur losses arising from a decline in the value of those securities, reduced
levels of income and expenses of enforcing its rights.


                                       3
<PAGE>

The value of your shares could be adversely affected if the computer systems
used by the fund's investment advisor and the fund's other service providers are
unable to distinguish the year 2000 from the year 1900.

The fund's investment advisor and independent technology consultants are working
to avoid year 2000-related problems in its systems and to obtain assurances that
other service providers are taking similar steps. Year 2000 problems may also
affect issuers in whose securities the fund invests.



                                       4
<PAGE>

PERFORMANCE INFORMATION

The bar chart and table shown below provide an indication of the risks of
investing in the fund. The fund's past performance is not necessarily an
indication of its future performance.

ANNUAL TOTAL RETURNS

The following bar chart shows changes in the performance of the Private
Investment Class shares from year to year.  The Private Investment Class shares
are not subject to sales loads.


PRIVATE INVESTMENT CLASS

[Graph Appears Here]

Year          Return (%)
1997            5.36%
1998            5.30%

The Private Investment Class shares' year-to-date total return as of September
30, 1999 was 3.56%.

During the periods shown in the bar chart, the highest quarterly return was
1.35% (quarter ended December 31, 1997) and the lowest quarterly return was
1.23% (quarter ended December 31, 1998).


                                       5
<PAGE>

PERFORMANCE TABLE

The following performance table reflects the performance of Private Investment
Class shares over the periods indicated.

<TABLE>
<CAPTION>
       Average Annual Total Returns
 (for the periods ended December 31, 1998)
                                                                           Since     Inception
                                             1 Year   5 Years  10 Years  Inception     Date
- ----------------------------------------------------------------------------------------------
<S>                                          <C>      <C>      <C>       <C>         <C>
Private Investment Class                       5.30%        -         -       5.28%   02/16/96
- ----------------------------------------------------------------------------------------------
</TABLE>


Private Investment Class shares' seven-day yield on December 31, 1998 was 4.80%.
For the current seven-day yield, call (800) 877-7748.


                                       6
<PAGE>

FEE TABLE AND EXPENSE EXAMPLE

FEE TABLE

This table describes the fees and expenses that you may pay if you buy and hold
shares of the fund:

<TABLE>
<CAPTION>
                                                              Private Investment Class
                                                              ------------------------
<S>                                                           <C>
Shareholder Fees (fees paid directly from your investment)

Maximum Sales Charge (Load) Imposed on Purchases
     (as a percentage of offering price)                                None
Maximum Deferred Sales Charge (Load)
     (as a percentage of original purchase price
     or redemption proceeds, whichever is less)                         None

Annual Fund Operating Expenses (expenses that are deducted
     from fund assets)

     Management Fees(1)                                                 0.15%
     Distribution and/or Service (12b-1) Fees                           0.50
     Other Expenses                                                     0.03
     Total Annual Fund Operating Expenses                               0.68
     Fee Waiver(2)                                                      0.20
     Net Expenses                                                       0.48
</TABLE>
- -----------------------------
(1)The investment advisor has voluntarily agreed to limit Management Fees to
0.055%.  This limitation can be terminated at any time.  Total Annual Fund
Operating Expenses, net of this voluntary limitation, are 0.39%.

(2)The distributor has contractually agreed to waive 0.20% of the Rule 12b-1
distribution plan fee.

As a result of 12b-1 fees, long-term shareholders in the fund may pay more than
the maximum permitted initial sales charge.

You should also consider the effect of any account fees charged by the financial
institution managing the account.

EXPENSE EXAMPLE

This example is intended to help you compare the costs of investing in the
Private Investment Class of the fund with the cost of investing in other mutual
funds.

The example assumes that you invest $10,000 in the fund for the time periods
indicated and then redeem all of your shares at the end of those periods. The
example also assumes that your investment has a 5% return each year and that the
fund's gross operating expenses remain the same. To the extent fees are waived
or expenses are reimbursed, the expenses will be lower. Although your actual
returns and costs may be higher or lower, based on these assumptions your costs
would be:

<TABLE>
<CAPTION>
                            1 Year    3 Years    5 Years    10 Years
                            ------    -------    -------    --------
<S>                         <C>       <C>        <C>        <C>
Private Investment Class      $69       $218       $379       $847
</TABLE>

                                       7

<PAGE>

FUND MANAGEMENT

THE ADVISOR

A I M Advisors, Inc. (the advisor) serves as the fund's investment advisor and
is responsible for its day-to-day management. The advisor is located at 11
Greenway Plaza, Suite 100, Houston, Texas 77046-1173. The advisor supervises all
aspects of the fund's operations and provides investment advisory services to
the fund, including obtaining and evaluating economic, statistical and financial
information to formulate and implement investment programs for the fund.

The advisor has acted as an investment advisor since its organization in 1976.
Today, the advisor, together with its subsidiaries, advises or manages over 125
investment portfolios, including the fund, encompassing a broad range of
investment objectives.

ADVISOR COMPENSATION

During the fiscal year ended August 31, 1999, the advisor received compensation
of 0.06% of average daily net assets.

                                       8

<PAGE>

OTHER INFORMATION

SUITABILITY FOR INVESTORS

The Private Investment Class of the fund is intended for use primarily by
institutional customers of banks, certain broker-dealers and other financial
institutions (institutions). Individuals, corporations, partnerships and other
businesses that maintain qualified accounts at an institution may invest in
shares of the Private Investment Class through the institution, but may not
purchase shares directly. Each institution will render administrative support
services to its customers who are the beneficial owners of the shares of the
Private Investment Class. Such services include, among other things,
establishment and maintenance of shareholder accounts and records; assistance in
processing purchase and redemption transactions in shares of the Private
Investment Class; providing periodic statements showing a client's account
balance in shares of the Private Investment Class; distribution of fund proxy
statements, annual reports and other communications to shareholders whose
accounts are serviced by the institution; and such other services as the fund
may reasonably request. Institutions will be required to certify to the fund
that they comply with applicable state law regarding registration as broker-
dealers, or that they are exempt from such registration.

The Private Investment Class is designed to be a convenient and economical way
to invest in an open-end diversified money market fund. It is anticipated that
most investors will perform their own subaccounting.

Investors in the Private Investment Class have the opportunity to receive a
somewhat higher yield than might be obtainable through direct investment in
money market instruments, and enjoy the benefits of diversification, economies
of scale and same-day liquidity. Generally, higher interest rates can be
obtained on the purchase of very large blocks of money market instruments. Of
course, any such relative increase in interest rates may be offset to some
extent by the operating expenses of the Private Investment Class.

DIVIDENDS AND DISTRIBUTIONS

Dividends

The fund generally declares dividends on each business day and pays dividends
monthly. A business day is any day on which both the Federal Reserve Bank of New
York and The Bank of New York, the fund's custodian, are open for business.

Dividends are paid on settled shares of the fund as of 5:00 p.m. Eastern time.
Generally, shareholders whose purchase orders have been received by the fund
prior to 5:00 p.m. Eastern time and shareholders whose redemption proceeds have
not been wired to them on any business day are eligible to receive dividends on
that business day. The dividend declared on any day preceding a non-business day
of the fund will include the income accrued on such non-business day. Dividends
and distributions are paid in cash unless the shareholder has elected to have
such dividends and distributions reinvested in the form of additional full and
fractional shares at net asset value.

Capital Gains Distributions

The fund generally distributes net realized capital gains (including net short-
term capital gains), if any, annually. The fund does not expect to realize any
long-term capital gains and losses.

                                       9

<PAGE>

FINANCIAL HIGHLIGHTS

The financial highlights table is intended to help you understand the financial
performance of the Private Investment Class. Certain information reflects
financial results for a single fund share.

The total returns in the table represent the rate that an investor would have
earned (or lost) on an investment in the fund (assuming reinvestment of all
dividends and distributions).

This information has been audited by KPMG LLP, whose report, along with the
fund's financial statements, is included in the fund's annual report, which is
available upon request.

<TABLE>
<CAPTION>

                                                                                 Private Investment Class
                                                        -----------------------------------------------------------------------
                                                                                                              For the Period
                                                                                                             February 16, 1996
                                                                                                                  through
                                                                           Year Ended August 31,                 August 31,
                                                              1999             1998              1997               1996
                                                        ----------------  ----------------  ----------------  ----------------
<S>                                                     <C>               <C>                <C>              <C>
Net asset value, beginning of period                      $   1.00           $  1.00           $  1.00           $  1.00
- -----------------------------------------------------   ----------------  ----------------  ----------------  ----------------
Income from investment operations:
  Net investment income                                       0.05              0.05              0.05              0.03
- -----------------------------------------------------   ----------------  ----------------  ----------------  ----------------
  Less distributions:
    Dividends from net investment income                     (0.05)            (0.05)            (0.05)            (0.03)
- -----------------------------------------------------   ----------------  ----------------  ----------------  ----------------
Net asset value, end of period                            $   1.00           $  1.00           $  1.00           $  1.00
- -----------------------------------------------------   ----------------  ----------------  ----------------  ----------------
Total return                                                  4.85%             5.43%             5.27%             2.74%
- -----------------------------------------------------   ----------------  ----------------  ----------------  ----------------
Ratios/supplemental data:
Net assets, end of period (000s omitted)                  $266,031           $70,058           $70,856           $44,981
- -----------------------------------------------------   ----------------  ----------------  ----------------  ----------------
Ratio of expenses to average net assets (a)                   0.39% (b)         0.38%             0.36%             0.32% (c)
- -----------------------------------------------------   ----------------  ----------------  ----------------  ----------------
Ratio of net investment income to average net
 assets (d)                                                   4.72% (b)         5.29%             5.16%             5.04% (c)
- -----------------------------------------------------   ----------------  ----------------  ----------------  ----------------
</TABLE>
(a) After fee waivers and/or expense reimbursements. Ratios of expenses to
    average net assets prior to fee waivers and/or expense reimbursements were
    0.68%, 0.68%, 0.68%, and 0.69% (annualized) for the periods 1999-1996,
    respectively.
(b) Ratios based on average net assets of $200,227,919.
(c) Annualized.
(d) After fee waivers and/or expense reimbursements. Ratios of net investment
    income to average net assets prior to fee waivers and/or expense
    reimbursements were 4.42%, 4.99%, 4.84%, and 4.67% (annualized) for the
    periods 1999-1996, respectively.

                                       10
<PAGE>

SHAREHOLDER INFORMATION

The fund currently offers six classes of shares all of which share a common
investment objective and portfolio of investments. The six classes differ only
with respect to distribution arrangements for different categories of investors.

DISTRIBUTION AND SERVICE (12b-1) FEES

The fund has adopted a 12b-1 plan with respect to the Private Investment Class
that allows the fund to pay distribution fees to Fund Management Company (the
distributor) for the sale and distribution of its shares and fees for services
provided to shareholders. Because the fund pays these fees out of its assets on
an ongoing basis, over time these fees will increase the cost of your investment
and may cost you more than paying other types of sales charges.

PURCHASING SHARES

The minimum initial investment in the Private Investment Class is $10,000. No
minimum amount is required for subsequent investments in the fund, nor are
minimum balances required.

Purchase orders will be accepted for execution on the day the order is placed,
provided that the order is properly submitted and received by the transfer agent
prior to 5:00 p.m. Eastern time on a business day of the fund. Purchase orders
received after such time will be processed at the next day's net asset value.
You may purchase shares by submitting an Account Application to the fund's
transfer agent, A I M Fund Services, Inc. (transfer agent) at P.O. Box 4497,
Houston, Texas 77210-4497 prior to your initial purchase of shares. You must
open a fund account through an institution in accordance with procedures
established by such institution. A purchase order is considered received at the
time The Bank of New York receives federal funds (member bank deposits with a
Federal Reserve Bank) for the order, provided the transfer agent has received
notice of the order or at the time the order is placed, if the fund is assured
of payment. You may obtain an Account Application from the distributor.
Subsequent purchases of shares of the funds may also be made via AIM LINK--
Registered Trademark--Remote, a personal computer application software product.

We may request that an institution maintain separate master accounts in the fund
for shares held by the institution (a) for its own account, for the account of
other institutions and for accounts for which the institution acts as a
fiduciary; and (b) for accounts for which the institution acts in some other
capacity. An institution may aggregate its master accounts and subaccounts to
satisfy the minimum investment requirement.

If you propose to open a fund account with an institution, you should consult
with a representative of such institution to obtain a description of the rules
governing such an account. A statement with regard to your investment in the
Private Investment Class is supplied periodically, and confirmations of all
transactions for your account are provided by the institution promptly upon
request. In addition, proxies, periodic reports and other information from the
institution with regard to your shares of the Private Investment Class will be
sent to you.

You may place an order for the purchase of shares of the Private Investment
Class with the institution. The institution is responsible for the prompt
transmission of the order to the transfer agent. The fund is normally required
to make immediate settlement in federal funds for portfolio securities
purchased. Accordingly, payment for shares of the Private Investment Class
purchased by institutions on behalf of their clients must be in federal funds.
If an order to purchase shares is paid for other than in federal funds, the
order may be delayed up to two business days while the institution completes the
conversion into federal funds.

                                       11
<PAGE>

REDEEMING SHARES

You may redeem any or all of your shares at the net asset value next determined
after receipt of a redemption request in proper form by the fund. There is no
charge for redemption. Redemption requests with respect to shares of the Private
Investment Class are normally made through a customer's institution.

You may request a redemption by calling the transfer agent at (800) 877-7748, or
by using AIM LINK--Registered Trademark--Remote. Payment for redeemed shares is
normally made by Federal Reserve wire to the commercial bank account designated
in your Account Application. You may also request that payment be made by check.
We use reasonable procedures to confirm that instructions communicated by
telephone are genuine and are not liable for telephone instructions that are
reasonably believed to be genuine. Such reasonable procedures may include
recordings of telephone transactions maintained for a reasonable period of time.

Payment for redemption orders received prior to 5:00 p.m. Eastern time will
normally be made on the same day. Payment for shares redeemed by mail and
payment for telephone redemptions in amounts of less than $1,000 may be made by
check mailed within seven days after receipt of the redemption request in proper
form. The fund may make payment for telephone redemptions in excess of $1,000 by
check when it is considered to be in the fund's best interest to do so.

Dividends payable up to the date of redemption on redeemed shares will normally
be paid by wire transfer on the next dividend payment date. However, if all of
the shares in your account are redeemed, you will receive dividends payable up
to the date of redemption with the proceeds of the redemption.

THE FUND AND ITS AGENTS RESERVE THE RIGHT AT ANY TIME TO:
 . REJECT OR CANCEL ANY PART OF ANY PURCHASE ORDER;
 . MODIFY ANY TERMS OR CONDITIONS OF PURCHASE OF SHARES OF THE FUND; OR
 . WITHDRAW ALL OR ANY PART OF THE OFFERING MADE BY THIS PROSPECTUS.

PRICING OF SHARES

Determination of Net Asset Value

The price of each of the fund's shares is the fund's net asset value per share.
The fund determines the net asset value of its shares as of 5:00 p.m. Eastern
time on each day on which both the Federal Reserve Bank of New York and The Bank
of New York are open for business (business day). The fund values portfolio
securities on the basis of amortized cost, which approximates market value.

Timing of Orders

The fund prices purchase and redemption orders at the net asset value calculated
after the transfer agent receives an order in good form. If the transfer agent
receives a redemption request on a business day prior to 5:00 p.m. Eastern time,
the fund will normally wire redemption proceeds on that day. If the transfer
agent receives a redemption request after 5:00 p.m. Eastern time, the redemption
will be processed at the net asset value next determined. Shareholders will
accrue dividends until the day the fund wires redemption proceeds. The fund may
postpone the right of redemption only under unusual circumstances, as allowed by
the Securities and Exchange Commission, such as when the New York Stock Exchange
restricts or suspends trading. The fund reserves the right to change the time
for which purchase and redemption orders must be submitted to and received by
the transfer agent for execution on the same day on any day when the primary
government securities dealers are either closed for business or close early, or
trading in money market securities is limited due to national holidays.

                                       12
<PAGE>

TAXES

Dividends and distributions received by shareholders are taxable as ordinary
income or long-term capital gains for federal income tax purposes, whether
reinvested in additional shares or taken in cash. Distributions are taxable at
different rates depending on the length of time the fund holds its assets.
Different tax-rates apply to ordinary income and long-term capital gain,
distributions regardless of how long shares are held. Every year, information
will be sent showing the amount of dividends and distributions received from the
fund during the prior year.

Any long-term or short-term capital gains realized from redemptions of the
shares will be subject to federal income tax.

The foreign, state and local tax consequences of investing in the fund may
differ materially from the federal income tax consequences described above.
Shareholders should consult their tax advisor before investing.


                                       13
<PAGE>

                               [BACK COVER PAGE]

OBTAINING ADDITIONAL INFORMATION

More information may be obtained free of charge upon request. The Statement of
Additional Information (SAI), a current version of which is on file with the
Securities and Exchange Commission (SEC), contains more details about the fund
and is incorporated by reference into the prospectus (is legally a part of this
prospectus). Annual and semiannual reports to shareholders contain additional
information about the fund's investments. The fund's annual report also
discusses the market conditions and investment strategies that significantly
affected the fund's performance during its last fiscal year.

If you have questions about this fund, another fund in The AIM Family of
Funds--Registered Trademark--or your account, or wish to obtain free copies of
the fund's current SAI or annual or semiannual reports, please contact us

BY MAIL:          A I M Fund Services, Inc.
                  P. O. Box 4497
                  Houston, TX 77210-4497

BY TELEPHONE:     (800) 877-7748

BY E-MAIL:        [email protected]

ON THE INTERNET:  http://www.aimfunds.com (prospectuses and annual and
                  semiannual reports only)

You also can review and obtain copies of the fund's SAI, reports and other
information at the SEC's Public Reference Room in Washington, DC; on the EDGAR
database on the SEC's Internet website (http://www.sec.gov); or, after paying a
duplication fee, by sending a letter to the SEC's Public Reference Section,
Washington, DC 20549-0102 or by sending an electronic mail request to
[email protected]. Please call the SEC at 1-202-942-8090 for information about
the Public Reference Room.


Liquid Assets Portfolio
SEC 1940 Act file number: 811-7892




                                Back Cover Page
<PAGE>

[AIM LOGO]


RESERVE CLASS

LIQUID ASSETS PORTFOLIO
                                                               PROSPECTUS
                                                               DECEMBER 17, 1999


Liquid Assets Portfolio seeks to provide as high a level of current income as is
consistent with the preservation of capital and liquidity.

This prospectus contains important information about the Reserve Class of the
fund. Please read it before investing and keep it for future reference.

As with all other mutual fund securities, the Securities and Exchange Commission
has not approved or disapproved these securities or determined whether the
information in this prospectus is adequate or accurate. Anyone who tells you
otherwise is committing a crime.

There can be no assurance that the fund will be able to maintain a stable net
asset value of $1.00 per share.


                                       1
<PAGE>

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>

                                                                            Page
<S>                                                              <C>
Investment Objective and Strategies............................                3

Principal Risks of Investing in the Fund.......................                3

Performance Information........................................                5
     Annual Total Returns......................................                5
     Performance Table.........................................                6

Fee Table and Expense Example..................................                7
     Fee Table.................................................                7
     Expense Example...........................................                7

Fund Management................................................                8
     The Advisor...............................................                8
     Advisor Compensation......................................                8

Other Information..............................................                9
     Suitability for Investors.................................                9
     Dividends and Distributions...............................                9

Shareholder Information........................................               10
     Distribution and Service (12b-1) Fees.....................               10
     Purchasing Shares.........................................               10
     Redeeming Shares..........................................               11
     Pricing of Shares.........................................               11
     Taxes.....................................................               12

Obtaining Additional Information...............................  Back Cover Page
</TABLE>

The AIM Family of Funds, The AIM Family of Funds and Design (i.e., the AIM
logo), AIM and Design, AIM, AIM LINK, AIM Institutional Funds, aimfunds.com, La
Familia AIM de Fondos, La Familia AIM de Fondos and Design and Invest with
Discipline are registered service marks and AIM Bank Connection, AIM Funds, AIM
Funds and Design, AIM Internet Connect and AIM Investor are service marks of
A I M Management Group Inc.

No dealer, salesperson or any other person has been authorized to give any
information or to make any representations other than those contained in this
prospectus, and you should not rely on such other information or
representations.


                                       2
<PAGE>

INVESTMENT OBJECTIVE AND STRATEGIES

The fund's investment objective is to provide as high a level of current income
as is consistent with the preservation of capital and liquidity.

The fund attempts to meet this objective by investing only in high-quality U.S.
dollar denominated short-term obligations, including:

  . securities issued by the U.S. government or its agencies;

  . bankers' acceptances, certificates of deposit and time deposits from banks;

  . repurchase agreements;

  . commercial paper;

  . taxable municipal securities; and

  . master notes.

The fund will maintain a weighted average maturity of 90 days or less. The fund
invests in compliance with Rule 2a-7 under the Investment Company Act of 1940.
The fund may invest up to 50% of its assets in U.S. dollar-denominated foreign
securities.

The portfolio managers focus on securities they believe have favorable prospects
for current income consistent with the preservation of capital and liquidity.
The portfolio managers usually hold portfolio securities to maturity, but may
sell a particular security when they deem it advisable, such as when any of the
factors above materially changes.

In anticipation of or in response to adverse market conditions, for cash
management purposes or for defensive purposes, the fund may temporarily hold all
or a portion of its assets in cash or shares of affiliated money market funds.
As a result, the fund may not achieve its investment objective.

PRINCIPAL RISKS OF INVESTING IN THE FUND

An investment in the fund is not a deposit of a bank and is not insured or
guaranteed by the Federal Deposit Insurance Corporation or any other government
agency. Although the fund seeks to preserve the value of your investment at
$1.00 per share, it is possible to lose money by investing in the fund.
Additionally, the fund's yield will vary as the short-term securities in its
portfolio mature and the proceeds are reinvested in securities with different
interest rates.

The following factors could reduce the fund's income and/or share price:

  . sharply rising interest rates;

  . downgrades of credit ratings or defaults of any of the fund's holdings; and

  . the risks generally associated with concentrating investments in the banking
    industry, such as interest rate risk, credit risk and regulatory
    developments relating to the banking and financial services industries.

If the seller of a repurchase agreement in which the fund invests defaults on
its obligation or declares bankruptcy, the fund may experience delays in selling
the securities underlying the repurchase agreement. As a result, the fund may
incur losses arising from a decline in the value of those securities, reduced
levels of income and expenses of enforcing its rights.



                                       3
<PAGE>

The value of your shares could be adversely affected if the computer systems
used by the fund's investment advisor and the fund's other service providers are
unable to distinguish the year 2000 from the year 1900.

The fund's investment advisor and independent technology consultants are working
to avoid year 2000-related problems in its systems and to obtain assurances that
other service providers are taking similar steps. Year 2000 problems may also
affect issuers in whose securities the fund invests.



                                       4
<PAGE>

PERFORMANCE INFORMATION

The bar chart and table shown below provide an indication of the risks of
investing in the fund.  The fund's past performance is not necessarily an
indication of its future performance.

ANNUAL TOTAL RETURNS

The following bar chart shows changes in the performance of the Institutional
Class shares from year to year. Neither the Reserve Class  shares nor the
Institutional Class shares are subject to sales loads.

Institutional Class

[Bar Chart Appears Here]

Year         Return (%)
1994           4.37%
1995           6.08%
1996           5.52%
1997           5.67%
1998           5.61%

The returns are those of the fund's Institutional Class shares, which are not
offered in this prospectus. Reserve Class shares would have substantially
similar annual returns because the shares are invested in the same portfolio of
securities, but would be lower to the extent that the classes have different
expenses.

The Institutional Class shares' year-to-date total return as of September 30,
1999 was 3.79%.

During the periods shown in the bar chart, Institutional Class' highest
quarterly return was 1.52% (quarter ended June 30, 1995) and the lowest
quarterly return was 0.84% (quarter ended March 31, 1994).


                                       5
<PAGE>

PERFORMANCE TABLE

The following performance table reflects the performance of Institutional Class
shares over the periods indicated.

<TABLE>
<CAPTION>
       Average Annual Total Returns
 (for the periods ended December 31, 1998)
                                                                            Since     Inception
                                             1 Year   5 Years   10 Years  Inception     Date
- -----------------------------------------------------------------------------------------------
<S>                                          <C>      <C>       <C>       <C>         <C>
Institutional Class                            5.61%     5.45%         -       5.39%   11/04/93
- -----------------------------------------------------------------------------------------------
Reserve Class                                     -         -          -          -    01/04/99
- -----------------------------------------------------------------------------------------------
</TABLE>


For the current seven-day yield of Reserve Class shares, call (800) 417-8837.

                                       6
<PAGE>

FEE TABLE AND EXPENSE EXAMPLE

FEE TABLE

This table describes the fees and expenses that you may pay if you buy and hold
shares of the fund:

                                                                  Reserve Class
                                                                  -------------
<TABLE>
<CAPTION>
<S>                                                                 <C>
Shareholder Fees (fees paid directly from your investment)
   Maximum Sales Charge (Load) Imposed on Purchases
     (as a percentage of offering price)                               None
   Maximum Deferred Sales Charge (Load)
     (as a percentage of original purchase price
     or redemption proceeds, whichever is less)                        None

Annual Fund Operating Expenses (expenses that are deducted
  from fund assets)(1)

  Management Fees(2)                                                   0.15%
  Distribution and/or Service (12b-1) Fees                             1.00
  Other Expenses                                                       0.03
  Total Annual Fund Operating Expenses                                 1.18
  Fee Waiver(3)                                                        0.20
  Net Expenses                                                         0.98
</TABLE>
- -------------------------------------------------------------
(1) The fees and expenses are based on estimated net assets for the current
fiscal period.

(2) The investment advisor has voluntarily agreed to limit Management Fees to
0.055%.  This limitation can be terminated at any time.  Total Annual Fund
Operating Expenses, net of this voluntary limitation, are 0.89%.

(3) The distributor has contractually agreed to waive 0.20% of the Rule 12b-1
distribution plan fee.

As a result of 12b-1 fees, long-term shareholders in the fund may pay more than
the maximum permitted initial sales charge.

You should also consider the effect of any account fees charged by the financial
institution managing the account.

EXPENSE EXAMPLE

This example is intended to help you compare the costs of investing in the
Reserve Class of  the fund with the cost of investing in other mutual funds.

The example assumes that you invest $10,000 in the fund for the time periods
indicated and then redeem all of your shares at the end of those periods.  The
example also assumes that your investment has a 5% return each year and that the
fund's gross operating expenses remain the same.  To the extent fees are waived
or expenses are reimbursed, the expenses will be lower.  Although your actual
returns and costs may be higher or lower, based on these assumptions your costs
would be:

                    1 Year       3 Years
                    ------       -------
Reserve Class       $ 120        $ 375


                                       7
<PAGE>

FUND MANAGEMENT

THE ADVISOR

AIM Advisors, Inc. (the advisor) serves as the fund's investment advisor and
is responsible for its day-to-day management. The advisor is located at 11
Greenway Plaza, Suite 100, Houston, Texas 77046-1173. The advisor supervises
all aspects of the fund's operations and provides investment advisory services
to the fund, including obtaining and evaluating economic, statistical and
financial information to formulate and implement investment programs for the
fund.

The advisor has acted as an investment advisor since its organization in 1976.
Today, the advisor, together with its subsidiaries, advises or manages over 125
investment portfolios, including the fund, encompassing a broad range of
investment objectives.

ADVISOR COMPENSATION

During the fiscal year ended August 31, 1999, the advisor received compensation
of 0.06% of average daily net assets.


                                       8
<PAGE>

OTHER INFORMATION

SUITABILITY FOR INVESTORS

The Reserve Class of the fund is intended for use primarily by institutional
customers of banks, certain broker-dealers and other financial institutions
(institutions).  Individuals, corporations, partnerships and other businesses
that maintain qualified accounts at an institution may invest in shares of the
Reserve Class through the institution, but may not purchase shares directly.
Each institution will render administrative support services to its customers
who are the beneficial owners of the shares of the Reserve Class.  Such services
include, among other things, establishment and maintenance of shareholder
accounts and records; assistance in processing purchase and redemption
transactions in shares of the Reserve Class; providing periodic statements
showing a client's account balance in shares of the Reserve Class; distribution
of fund proxy statements, annual reports and other communications to
shareholders whose accounts are serviced by the institution; and such other
services as the fund may reasonably request.  Institutions will be required to
certify to the fund that they comply with applicable state law regarding
registration as broker-dealers, or that they are exempt from such registration.

The Reserve Class is designed to be a convenient and economical way to invest in
an open-end diversified money market fund.  It is anticipated that most
investors will perform their own subaccounting.

Investors in the Reserve Class have the opportunity to receive a somewhat higher
yield than might be obtainable through direct investment in money market
instruments, and enjoy the benefits of diversification, economies of scale and
same-day liquidity.  Generally, higher interest rates can be obtained on the
purchase of very large blocks of money market instruments.  Of course, any such
relative increase in interest rates may be offset to some extent by the
operating expenses of the Reserve Class.

DIVIDENDS AND DISTRIBUTIONS

Dividends

The fund generally declares dividends on each business day and pays dividends
monthly.  A business day is any day on which both the Federal Reserve Bank of
New York and The Bank of New York, the fund's custodian, are open for business.

Dividends are paid on settled shares of the fund as of 5:00 p.m. Eastern time.
Generally, shareholders whose purchase orders have been received by the fund
prior to 5:00 p.m. Eastern time and shareholders whose redemption proceeds have
not been wired to them on any business day are eligible to receive dividends on
that business day.  The dividend declared on any day preceding a non-business
day of the fund will include the income accrued on such non-business day.
Dividends and distributions are paid in cash unless the shareholder has elected
to have such dividends and distributions reinvested in the form of additional
full and fractional shares at net asset value.

Capital Gains Distributions

The fund generally distributes net realized capital gains (including net short-
term capital gains), if any, annually. The fund does not expect to realize any
long-term capital gains and losses.


                                       9
<PAGE>

SHAREHOLDER INFORMATION

The fund currently offers six classes of shares all of which share a common
investment objective and portfolio of investments.  The six classes differ only
with respect to distribution arrangements for different categories of investors.

DISTRIBUTION AND SERVICE (12b-1) FEES

The fund has adopted a 12b-1 plan with respect to the Reserve Class that allows
the fund to pay distribution fees to Fund Management Company (the distributor)
for the sale and distribution of its shares and fees for services provided to
shareholders.  Because the fund pays these fees out of its assets on an ongoing
basis, over time these fees will increase the cost of your investment and may
cost you more than paying other types of sales charges.

PURCHASING SHARES

The minimum initial investment in the Reserve Class is $1,000. No minimum
amount is required for subsequent investments in the fund, nor are minimum
balances required.

Purchase orders will be accepted for execution on the day the order is placed,
provided that the order is properly submitted and received by the transfer agent
prior to 5:00 p.m. Eastern time on a business day of the fund. Purchase orders
received after such time will be processed at the next day's net assets value.
You may purchase shares by submitting an Account Application to the fund's
transfer agent, AIM Fund Services, Inc. (transfer agent) at P.O. Box 4497,
Houston, Texas 77210-4497 prior to your initial purchase of shares. You must
open a fund account through an institution in accordance with procedures
established by such institution. A purchase order is considered received at the
time The Bank of New York receives federal funds (member bank deposits with a
Federal Reserve Bank) for the order, provided the transfer agent has received
notice of the order or at the time the order is placed, if the fund is assured
of payment. You may obtain an Account Application from the distributor.
Subsequent purchases of shares of the funds may also be made via AIM
LINK--Registered Trademark--Remote, a personal computer application software
product.

We may request that an institution maintain separate master accounts in the fund
for shares held by the institution (a) for its own account, for the account of
other institutions and for accounts for which the institution acts as a
fiduciary; and (b) for accounts for which the institution acts in some other
capacity. An institution may aggregate its master accounts and subaccounts to
satisfy the minimum investment requirement.

If you propose to open a fund account with an institution, you should consult
with a representative of such institution to obtain a description of the rules
governing such an account. A statement with regard to your investment in the
Reserve Class is supplied periodically, and confirmations of all transactions
for your account are provided by the institution promptly upon request. In
addition, proxies, periodic reports and other information from the institution
with regard to your shares of the Reserve Class will be sent to you.

You may place an order for the purchase of shares of the Reserve Class with the
institution. The institution is responsible for the prompt transmission of the
order to the transfer agent. The fund is normally required to make immediate
settlement in federal funds for portfolio securities purchased. Accordingly,
payment for shares of the Reserve Class purchased by institutions on behalf of
their clients must be in federal funds. If an order to purchase shares is paid
for other than in federal funds, the order may be delayed up to two business
days while the institution completes the conversion into federal funds.


                                       10
<PAGE>

REDEEMING SHARES

You may redeem any or all of your shares at the net asset value next determined
after receipt of a redemption request in proper form by the fund. There is no
charge for redemption. Redemption requests with respect to shares of the Private
Investment Class are normally made through a customer's institution.

You may request a redemption by calling the transfer agent at (800) 417-8837, or
by using AIM LINK--Registered Trademark--Remote. Payment for redeemed shares
is normally made by Federal Reserve wire to the commercial bank account
designated in your Account Application. You may also request that payment be
made by check. We use reasonable procedures to confirm that instructions
communicated by telephone are genuine and are not liable for telephone
instructions that are reasonably believed to be genuine. Such reasonable
procedures may include recordings of telephone transactions maintained for a
reasonable period of time.

Payment for redemption orders received prior to 5:00 p.m. Eastern time will
normally be made on the same day. Payment for shares redeemed by mail and
payment for telephone redemptions in amounts of less than $1,000 may be made by
check mailed within seven days after receipt of the redemption request in proper
form. The fund may make payment for telephone redemptions in excess of $1,000 by
check when it is considered to be in the fund's best interest to do so.

Dividends payable up to the date of redemption on redeemed shares will normally
be paid by wire transfer on the next dividend payment date. However, if all of
the shares in your account are redeemed, you will receive dividends payable up
to the date of redemption with the proceeds of the redemption.

THE FUND AND ITS AGENTS RESERVE THE RIGHT AT ANY TIME TO:
 . REJECT OR CANCEL ANY PART OF ANY PURCHASE ORDER;
 . MODIFY ANY TERMS OR CONDITIONS OF PURCHASE OF SHARES OF THE FUND; OR
 . WITHDRAW ALL OR ANY PART OF THE OFFERING MADE BY THIS PROSPECTUS.

PRICING OF SHARES

Determination of Net Asset Value

The price of each of the fund's shares is the fund's net asset value per share.
The fund determines the net asset value of its shares as of 5:00 p.m. Eastern
time on each day on which both the Federal Reserve Bank of New York and The Bank
of New York are open for business (business day). The fund values portfolio
securities on the basis of amortized cost, which approximates market value.

Timing of Orders

The fund prices purchase and redemption orders at the net asset value calculated
after the transfer agent receives an order in good form. If the transfer agent
receives a redemption request on a business day prior to 5:00 p.m. Eastern time,
the fund will normally wire redemption proceeds on that day. If the transfer
agent receives a redemption request after 5:00 p.m. Eastern time, the redemption
will be processed at the net asset value next determined. Shareholders will
accrue dividends until the day the fund wires redemption proceeds. The fund may
postpone the right of redemption only under unusual circumstances, as allowed by
the Securities and Exchange Commission, such as when the New York Stock Exchange
restricts or suspends trading. The fund reserves the right to change the time
for which purchase and redemption orders must be submitted to and received by
the transfer agent for execution on the same day on any day when the primary
government securities dealers are either closed for business or close early, or
trading in money market securities is limited due to national holidays.


                                       11
<PAGE>

TAXES

Dividends and distributions received by shareholders are taxable as ordinary
income [or long-term capital gains] for federal income tax purposes, whether
reinvested in additional shares or taken in cash. Distributions are taxable at
different rates depending on the length of time the fund holds its assets.
[Different tax-rates apply to ordinary income and long-term capital gain,
distributions regardless of how long shares are held.] Every year, information
will be sent showing the amount of dividends and distributions received from the
fund during the prior year.

[Any long-term or short-term capital gains realized from redemptions of the
shares will be subject to federal income tax.]

The foreign, state and local tax consequences of investing in the fund may
differ materially from the federal income tax consequences described above.
Shareholders should consult their tax advisor before investing.


                                       12
<PAGE>

                               [BACK COVER PAGE]

OBTAINING ADDITIONAL INFORMATION

More information may be obtained free of charge upon request. The Statement of
Additional Information (SAI), a current version of which is on file with the
Securities and Exchange Commission (SEC), contains more details about the fund
and is incorporated by reference into the prospectus (is legally a part of this
prospectus). Annual and semiannual reports to shareholders contain additional
information about the fund's investments. The fund's annual report also
discusses the market conditions and investment strategies that significantly
affected the fund's performance during its last fiscal year.

If you have questions about this fund, another fund in The AIM Family of
Funds--Registered Trademark--or your account, or wish to obtain free copies
of the fund's current SAI or annual or semiannual reports, please contact us

BY MAIL:            AIM Fund Services, Inc.
                    P.O. Box 4497
                    Houston, TX 77210-4497

BY TELEPHONE:       (800) 417-8837

BY E-MAIL:          [email protected]

ON THE INTERNET:    http://www.aimfunds.com (prospectuses and
                    annual and semiannual reports only)

You also can review and obtain copies of the fund's SAI, reports and other
information at the SEC's Public Reference Room in Washington, DC; on the EDGAR
database on the SEC's Internet website (http://www.sec.gov); or, after paying a
duplication fee, by sending a letter to the SEC's Public Reference Section,
Washington, DC 20549-0102 or by sending an electronic mail request to
[email protected]. Please call the SEC at 1-202-942-8090 for information about
the Public Reference Room.


Liquid Assets Portfolio
SEC 1940 Act file number: 811-7892

                                Back Cover Page
<PAGE>

[AIM LOGO]


RESOURCE CLASS

LIQUID ASSETS PORTFOLIO

                                                PROSPECTUS
                                                DECEMBER 17, 1999



Liquid Assets Portfolio seeks to provide as high a level of current income as is
consistent with the preservation of capital and liquidity.

This prospectus contains important information about the Resource Class of the
fund. Please read it before investing and keep it for future reference.

As with all other mutual fund securities, the Securities and Exchange Commission
has not approved or disapproved these securities or determined whether the
information in this prospectus is adequate or accurate. Anyone who tells you
otherwise is committing a crime.


There can be no assurance that the fund will be able to maintain a stable net
asset value of $1.00 per share.

                                       1

<PAGE>

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                   Page
<S>                                                <C>
Investment Objective and Strategies..........        3

Principal Risks of Investing in the Fund.....        3

Performance Information......................        5
     Annual Total Returns....................        5
     Performance Table.......................        6

Fee Table and Expense Example................        7
     Fee Table...............................        7
     Expense Example.........................        7

Fund Management..............................        8
     The Advisor.............................        8
     Advisor Compensation....................        8

Other Information............................        9
     Suitability for Investors...............        9
     Dividends and Distributions.............        9

Financial Highlights.........................       10

Shareholder Information......................       11
     Distribution and Service (12b-1) Fees...       11
     Purchasing Shares.......................       11
     Redeeming Shares........................       12
     Pricing of Shares.......................       12
     Taxes...................................       13

Obtaining Additional Information............. Back Cover Page
</TABLE>

The AIM Family of Funds, The AIM Family of Funds and Design (i.e., the AIM
logo), AIM and Design, AIM, AIM LINK, AIM Institutional Funds, aimfunds.com,
La Familia AIM de Fondos, La Familia AIM de Fondos and Design and Invest with
Discipline are registered service marks and AIM Bank Connection, AIM Funds, AIM
Funds and Design, AIM Internet Connect and AIM Investor are service marks of
AIM Management Group Inc.

No dealer, salesperson or any other person has been authorized to give any
information or to make any representations other than those contained in this
prospectus, and you should not rely on such other information or
representations.

                                       2
<PAGE>

INVESTMENT OBJECTIVE AND STRATEGIES

The fund's investment objective is to provide as high a level of current income
as is consistent with the preservation of capital and liquidity.

The fund attempts to meet this objective by investing only in high-quality U.S.
dollar denominated short-term obligations, including:

 . securities issued by the U.S. government or its agencies;

 . bankers' acceptances, certificates of deposit and time deposits from banks;

 . repurchase agreements;

 . commercial paper;

 . taxable municipal securities; and

 . master notes.

The fund will maintain a weighted average maturity of 90 days or less.
The fund invests in compliance with Rule 2a-7 under the Investment Company Act
of 1940. The fund may invest up to 50% of its assets in U.S. dollar-denominated
foreign securities.

The portfolio managers focus on securities they believe have favorable prospects
for current income consistent with the preservation of capital and liquidity.
The portfolio managers usually hold portfolio securities to maturity, but may
sell a particular security when they deem it advisable, such as when any of the
factors above materially changes.

In anticipation of or in response to adverse market conditions, for cash
management purposes or for defensive purposes, the fund may temporarily hold all
or a portion of its assets in cash or shares of affiliated money market funds.
As a result, the fund may not achieve its investment objective.

PRINCIPAL RISKS OF INVESTING IN THE FUND

An investment in the fund is not a deposit of a bank and is not insured or
guaranteed by the Federal Deposit Insurance Corporation or any other government
agency. Although the fund seeks to preserve the value of your investment at
$1.00 per share, it is possible to lose money by investing in the fund.
Additionally, the fund's yield will vary as the short-term securities in its
portfolio mature and the proceeds are reinvested in securities with different
interest rates.

The following factors could reduce the fund's income and/or share price:

 . sharply rising interest rates;

 . downgrades of credit ratings or defaults of any of the fund's holdings; and

 . the risks generally associated with concentrating investments in the banking
  industry, such as interest rate risk, credit risk and regulatory developments
  relating to the banking and financial services industries.

If the seller of a repurchase agreement in which the fund invests defaults on
its obligation or declares bankruptcy, the fund may experience delays in selling
the securities underlying the repurchase agreement. As a result, the fund may
incur losses arising from a decline in the value of those securities, reduced
levels of income and expenses of enforcing its rights.

                                       3

<PAGE>

The value of your shares could be adversely affected if the computer systems
used by the fund's investment advisor and the fund's other service providers are
unable to distinguish the year 2000 from the year 1900.

The fund's investment advisor and independent technology consultants are working
to avoid year 2000-related problems in its systems and to obtain assurances that
other service providers are taking similar steps. Year 2000 problems may also
affect issuers in whose securities the fund invests.

                                       4

<PAGE>

PERFORMANCE INFORMATION

The bar chart and table shown below provide an indication of the risks of
investing in the fund. The fund's past performance is not necessarily an
indication of its future performance.

ANNUAL TOTAL RETURNS

The following bar chart shows changes in the performance of the Resource Class
shares from year to year. The Resource Class shares are not subject to sales
loads.

                                Resource Class

                             [GRAPH APPEARS HERE]

<TABLE>
<CAPTION>
Year    Return (%)
<S>     <C>
1997       5.46%
1998       5.40%
</TABLE>

The Resource Class shares' year-to-date total return as of September 30, 1999
was 3.64%.

During the periods shown in the bar chart, the highest quarterly return was
1.37% (quarter ended December 31, 1997) and the lowest quarterly return was
1.26% (quarter ended December 31, 1998).

                                       5

<PAGE>

PERFORMANCE TABLE

The following performance table reflects the performance of Resource Class
shares over the periods indicated.

<TABLE>
<CAPTION>
- ----------------------------------------------------------------------------------------------
       Average Annual Total Returns
 (for the periods ended December 31, 1998)
                                                                           Since     Inception
                                             1 Year   5 Years  10 Years  Inception     Date
- ----------------------------------------------------------------------------------------------
<S>                                          <C>      <C>      <C>       <C>         <C>
Resource Class                               5.40%      -         -        5.43%     09/23/96
- ----------------------------------------------------------------------------------------------
</TABLE>

Resource Class shares' seven-day yield on December 31, 1998 was 4.90%. For the
current seven-day yield, call (800) 246-3426.

                                       6
<PAGE>

FEE TABLE AND EXPENSE EXAMPLE

FEE TABLE

This table describes the fees and expenses that you may pay if you buy and hold
shares of the fund:

<TABLE>
<CAPTION>
                                                    Resource Class
                                                    --------------
<S>                                                 <C>
Shareholder Fees (fees paid directly
  from your investment)

  Maximum Sales Charge (Load) Imposed on Purchases
    (as a percentage of offering price)                  None
  Maximum Deferred Sales Charge (Load)
    (as a percentage of original purchase price
    or redemption proceeds, whichever is less)           None

Annual Fund Operating Expenses (expenses
  that are deducted from fund assets)

  Management Fees(1)                                     0.15%
  Distribution and/or Service (12b-1) Fees               0.20
  Other Expenses                                         0.03
  Total Annual Fund Operating Expenses                   0.38
</TABLE>
- ------------
(1)The investment advisor has voluntarily agreed to limit Management Fees to
0.055%. This limitation can be terminated at any time. Total Annual Fund
Operating Expenses, net of this voluntary limitation, are 0.29%.

You should also consider the effect of any account fees charged by the financial
institution managing the account.

EXPENSE EXAMPLE

This example is intended to help you compare the costs of investing in the
Resource Class of the fund with the cost of investing in other mutual funds.

The example assumes that you invest $10,000 in the fund for the time periods
indicated and then redeem all of your shares at the end of those periods. The
example also assumes that your investment has a 5% return each year and that the
fund's gross operating expenses remain the same. To the extent fees are waived
or expenses are reimbursed, the expenses will be lower. Although your actual
returns and costs may be higher or lower, based on these assumptions your costs
would be:

<TABLE>
<CAPTION>
                       1 Year    3 Years    5 Years    10 Years
                       ------    -------    -------    --------
<S>                    <C>       <C>        <C>        <C>
Resource Class          $ 39       $122       $213       $480
</TABLE>

                                       7

<PAGE>

FUND MANAGEMENT

THE ADVISOR

A I M Advisors, Inc. (the advisor) serves as the fund's investment advisor and
is responsible for its day-to-day management. The advisor is located at 11
Greenway Plaza, Suite 100, Houston, Texas 77046-1173. The advisor supervises all
aspects of the fund's operations and provides investment advisory services to
the fund, including obtaining and evaluating economic, statistical and financial
information to formulate and implement investment programs for the fund.

The advisor has acted as an investment advisor since its organization in 1976.
Today, the advisor, together with its subsidiaries, advises or manages over 125
investment portfolios, including the fund, encompassing a broad range of
investment objectives.

ADVISOR COMPENSATION

During the fiscal year ended August 31, 1999, the advisor received compensation
of 0.06% of average daily net assets.

                                       8
<PAGE>

OTHER INFORMATION

SUITABILITY FOR INVESTORS

The Resource Class of the fund is intended for use primarily by institutional
customers of banks, certain broker-dealers and other financial institutions
(institutions). Individuals, corporations, partnerships and other businesses
that maintain qualified accounts at an institution may invest in shares of the
Resource Class through the institution, but may not purchase shares directly.
Each institution will render administrative support services to its customers
who are the beneficial owners of the shares of the Resource Class. Such services
include, among other things, establishment and maintenance of shareholder
accounts and records; assistance in processing purchase and redemption
transactions in shares of the Resource Class; providing periodic statements
showing a client's account balance in shares of the Resource Class; distribution
of fund proxy statements, annual reports and other communications to
shareholders whose accounts are serviced by the institution; and such other
services as the fund may reasonably request. Institutions will be required to
certify to the fund that they comply with applicable state law regarding
registration as broker-dealers, or that they are exempt from such registration.

The Resource Class is designed to be a convenient and economical way to invest
in an open-end diversified money market fund. It is anticipated that most
investors will perform their own subaccounting.

Investors in the Resource Class have the opportunity to receive a somewhat
higher yield than might be obtainable through direct investment in money market
instruments, and enjoy the benefits of diversification, economies of scale and
same-day liquidity. Generally, higher interest rates can be obtained on the
purchase of very large blocks of money market instruments. Of course, any such
relative increase in interest rates may be offset to some extent by the
operating expenses of the Resource Class.

DIVIDENDS AND DISTRIBUTIONS

Dividends

The fund generally declares dividends on each business day and pays dividends
monthly. A business day is any day on which both the Federal Reserve Bank of New
York and The Bank of New York, the fund's custodian, are open for business.

Dividends are paid on settled shares of the fund as of 5:00 p.m. Eastern time.
Generally, shareholders whose purchase orders have been received by the fund
prior to 5:00 p.m. Eastern time and shareholders whose redemption proceeds have
not been wired to them on any business day are eligible to receive dividends on
that business day. The dividend declared on any day preceding a non-business day
of the fund will include the income accrued on such non-business day. Dividends
and distributions are paid in cash unless the shareholder has elected to have
such dividends and distributions reinvested in the form of additional full and
fractional shares at net asset value.

Capital Gains Distributions

The fund generally distributes net realized capital gains (including net short-
term capital gains), if any, annually. The fund does not expect to realize any
long-term capital gains and losses.

                                       9
<PAGE>

FINANCIAL HIGHLIGHTS

The financial highlights table is intended to help you understand the financial
performance of the Resource Class. Certain information reflects financial
results for a single fund share.

The total returns in the table represent the rate that an investor would have
earned (or lost) on an investment in the fund (assuming reinvestment of all
dividends and distributions).

This information has been audited by KPMG LLP, whose report, along with the
fund's financial statements, is included in the fund's annual report, which is
available upon request.

<TABLE>
<CAPTION>
                                                                                Resource Class
                                                                ----------------------------------------------
                                                                                                   For the Period
                                                                                                 September 23, 1996
                                                                                                      through
                                                                  Year Ended August 31,              August 31,
                                                                  1999             1998                 1997
                                                                --------          --------       -------------------
<S>                                                             <C>               <C>            <C>
Net asset value, beginning of period                            $   1.00          $   1.00             $    1.00
                                                                --------          --------             ---------
Income from investment operations:
  Net investment income                                             0.05              0.05                  0.05
                                                                --------          --------             ---------
Less distributions:
  Dividends from net investment income                             (0.05)            (0.05)                (0.05)
                                                                ========          ========             =========
Net asset value, end of period                                  $   1.00          $   1.00             $    1.00
                                                                ========          ========             =========
Total return                                                        4.96%             5.53%                 5.04%
                                                                ========          ========             =========
Ratios/supplemental data:
Net assets, end of period (000s omitted)                        $306,758          $ 86,041             $  80,510
                                                                ========          ========             =========
Ratio of expenses to average net assets (a)                     0.29% (b)            0.28%             0.27% (c)
                                                                ========          ========             =========
Ratio of net investment income to average net assets (d)        4.82% (b)            5.40%             5.34% (c)
                                                                ========          ========             =========
</TABLE>

(a) After fee waivers and/or expense reimbursements. Ratios of expenses to
    average net assets prior to fee waivers and/or expense reimbursements were
    0.38%, 0.38% and 0.39% (annualized) for the periods 1999-1997,
    respectively.

(b) Ratios based on average net assets of $125,571,582.

(c) Annualized.

(d) After fee waivers and/or expense reimbursements. Ratios of net investment
    income to average net assets prior to fee waivers and/or expense
    reimbursements were 4.72%, 5.30% and 5.22% (annualized) for the periods
    1999 - 1997, respectively.

                                       10
<PAGE>

SHAREHOLDER INFORMATION

The fund currently offers six classes of shares all of which share a common
investment objective and portfolio of investments. The six classes differ only
with respect to distribution arrangements for different categories of investors.

DISTRIBUTION AND SERVICE (12b-1) FEES

The fund has adopted a 12b-1 plan with respect to the Resource Class that allows
the fund to pay distribution fees to Fund Management Company (the distributor)
for the sale and distribution of its shares and fees for services provided to
shareholders. Because the fund pays these fees out of its assets on an ongoing
basis, over time these fees will increase the cost of your investment and may
cost you more than paying other types of sales charges.

PURCHASING SHARES

The minimum initial investment in the Resource Class is $10,000. No minimum
amount is required for subsequent investments in the fund, nor are minimum
balances required.

Purchase orders will be accepted for execution on the day the order is placed,
provided that the order is properly submitted and received by the transfer agent
prior to 5:00 p.m. Eastern time on a business day of the fund. Purchase orders
received after such time will be processed at the next day's net asset value.
You may purchase shares by submitting an Account Application to the fund's
transfer agent, A I M Fund Services, Inc. (transfer agent) at P.O. Box 4497,
Houston, Texas 77210-4497 prior to your initial purchase of shares. You must
open a fund account through an institution in accordance with procedures
established by such institution. A purchase order is considered received at the
time The Bank of New York receives federal funds (member bank deposits with a
Federal Reserve Bank) for the order, provided the transfer agent has received
notice of the order or at the time the order is placed, if the fund is assured
of payment. You may obtain an Account Application from the distributor.
Subsequent purchases of shares of the funds may also be made via AIM
LINK--Registered Trademark--Remote, a personal computer application software
product.

We may request that an institution maintain separate master accounts in the fund
for shares held by the institution (a) for its own account, for the account of
other institutions and for accounts for which the institution acts as a
fiduciary; and (b) for accounts for which the institution acts in some other
capacity. An institution may aggregate its master accounts and subaccounts to
satisfy the minimum investment requirement.

If you propose to open a fund account with an institution, you should consult
with a representative of such institution to obtain a description of the rules
governing such an account. A statement with regard to your investment in the
Resource Class is supplied periodically, and confirmations of all transactions
for your account are provided by the institution promptly upon request. In
addition, proxies, periodic reports and other information from the institution
with regard to your shares of the Resource Class will be sent to you.

You may place an order for the purchase of shares of the Resource Class with the
institution. The institution is responsible for the prompt transmission of the
order to the transfer agent. The fund is normally required to make immediate
settlement in federal funds for portfolio securities purchased. Accordingly,
payment for shares of the Resource Class purchased by institutions on behalf of
their clients must be in federal funds. If an order to purchase shares is paid
for other than in federal funds, the order may be delayed up to two business
days while the institution completes the conversion into federal funds.

                                       11
<PAGE>

REDEEMING SHARES

You may redeem any or all of your shares at the net asset value next determined
after receipt of a redemption request in proper form by the fund. There is no
charge for redemption. Redemption requests with respect to shares of the
Resource Class are normally made through a customer's institution.

You may request a redemption by calling the transfer agent at (800) 246-3426, or
by using AIM LINK--Registered Trademark--Remote. Payment for redeemed shares is
normally made by Federal Reserve wire to the commercial bank account designated
in your Account Application. You may also request that payment be made by check.
We use reasonable procedures to confirm that instructions communicated by
telephone are genuine and are not liable for telephone instructions that are
reasonably believed to be genuine. Such reasonable procedures may include
recordings of telephone transactions maintained for a reasonable period of time.

Payment for redemption orders received prior to 5:00 p.m. Eastern time will
normally be made on the same day. Payment for shares redeemed by mail and
payment for telephone redemptions in amounts of less than $1,000 may be made by
check mailed within seven days after receipt of the redemption request in proper
form. The fund may make payment for telephone redemptions in excess of $1,000 by
check when it is considered to be in the fund's best interest to do so.

Dividends payable up to the date of redemption on redeemed shares will normally
be paid by wire transfer on the next dividend payment date. However, if all of
the shares in your account are redeemed, you will receive dividends payable up
to the date of redemption with the proceeds of the redemption.

THE FUND AND ITS AGENTS RESERVE THE RIGHT AT ANY TIME TO:
 . REJECT OR CANCEL ANY PART OF ANY PURCHASE ORDER;
 . MODIFY ANY TERMS OR CONDITIONS OF PURCHASE OF SHARES OF THE FUND; OR
 . WITHDRAW ALL OR ANY PART OF THE OFFERING MADE BY THIS PROSPECTUS.

PRICING OF SHARES

Determination of Net Asset Value

The price of each of the fund's shares is the fund's net asset value per share.
The fund determines the net asset value of its shares as of 5:00 p.m. Eastern
time on each day on which both the Federal Reserve Bank of New York and The Bank
of New York are open for business (business day). The fund values portfolio
securities on the basis of amortized cost, which approximates market value.

Timing of Orders

The fund prices purchase and redemption orders at the net asset value calculated
after the transfer agent receives an order in good form. If the transfer agent
receives a redemption request on a business day prior to 5:00 p.m. Eastern time,
the fund will normally wire redemption proceeds on that day. If the transfer
agent receives a redemption request after 5:00 p.m. Eastern time, the redemption
will be processed at the net asset value next determined. Shareholders will
accrue dividends until the day the fund wires redemption proceeds. The fund may
postpone the right of redemption only under unusual circumstances, as allowed by
the Securities and Exchange Commission, such as when the New York Stock Exchange
restricts or suspends trading. The fund reserves the right to change the time
for which purchase and redemption orders must be submitted to and received by
the transfer agent for execution on the same day on any day when the primary
government securities dealers are either closed for business or close early, or
trading in money market securities is limited due to national holidays.

                                       12
<PAGE>

TAXES

Dividends and distributions received by shareholders are taxable as ordinary
income [or long-term capital gains] for federal income tax purposes, whether
reinvested in additional shares or taken in cash. Distributions are taxable at
different rates depending on the length of time the fund holds its assets.
[Different tax rates apply to ordinary income and long-term capital gain,
distributions regardless of how long shares are held.] Every year, information
will be sent showing the amount of dividends and distributions received from the
fund during the prior year.

[Any long-term or short-term capital gains realized from redemptions of the
shares will be subject to federal income tax.]

The foreign, state and local tax consequences of investing in the fund may
differ materially from the federal income tax consequences described above.
Shareholders should consult their tax advisor before investing.

                                       13
<PAGE>

                               [BACK COVER PAGE]

OBTAINING ADDITIONAL INFORMATION

More information may be obtained free of charge upon request. The Statement of
Additional Information (SAI), a current version of which is on file with the
Securities and Exchange Commission (SEC), contains more details about the fund
and is incorporated by reference into the prospectus (is legally a part of this
prospectus). Annual and semiannual reports to shareholders contain additional
information about the fund's investments. The fund's annual report also
discusses the market conditions and investment strategies that significantly
affected the fund's performance during its last fiscal year.

If you have questions about this fund, another fund in The AIM Family of Funds--
Registered Trademark-- or your account, or wish to obtain free copies of the
fund's current SAI or annual or semiannual reports, please contact us

BY MAIL:         A I M Fund Services, Inc.
                 P.O. Box 4497
                 Houston, TX 77210-4497

BY TELEPHONE:    (800) 246-3426

BY E-MAIL:       [email protected]

ON THE INTERNET: http://www.aimfunds.com (prospectuses and annual and semiannual
                 reports only)

You also can review and obtain copies of the fund's SAI, reports and other
information at the SEC's Public Reference Room in Washington, DC; on the EDGAR
database on the SEC's Internet website (http://www.sec.gov); or, after paying a
duplication fee, by sending a letter to the SEC's Public Reference Section,
Washington, DC 20549-0102 or by sending an electronic mail request to
[email protected]. Please call the SEC at 1-202-942-8090 for information about
the Public Reference Room.


Liquid Assets Portfolio
SEC 1940 Act file number: 811-7892


                                Back Cover Page
<PAGE>


                                                                    STATEMENT OF
                                                          ADDITIONAL INFORMATION

                           SHORT-TERM INVESTMENTS CO.

                            LIQUID ASSETS PORTFOLIO
                            (CASH MANAGEMENT CLASS)
                             (INSTITUTIONAL CLASS)
                          (PERSONAL INVESTMENT CLASS)
                           (PRIVATE INVESTMENT CLASS)
                                (RESERVE CLASS)
                                (RESOURCE CLASS)

                               11 GREENWAY PLAZA
                                   SUITE 100
                           HOUSTON, TEXAS 77046-1173
                                 (800) 659-1005

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

         THIS STATEMENT OF ADDITIONAL INFORMATION IS NOT A PROSPECTUS.
           IT SHOULD BE READ IN CONJUNCTION WITH A PROSPECTUS OF EACH
       OF THE ABOVE-NAMED CLASSES OF THE LIQUID ASSETS PORTFOLIO, COPIES
                      OF WHICH MAY BE OBTAINED BY WRITING
                  FUND MANAGEMENT COMPANY, 11 GREENWAY PLAZA,
                      SUITE 100, HOUSTON, TEXAS 77046-1173
                           OR CALLING (800) 659-1005

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

          STATEMENT OF ADDITIONAL INFORMATION DATED DECEMBER 17, 1999
   RELATING TO THE PROSPECTUS OF EACH OF THE FOLLOWING CLASSES OF THE LIQUID
  ASSETS PORTFOLIO: CASH MANAGEMENT CLASS PROSPECTUS DATED DECEMBER 17, 1999,
  INSTITUTIONAL CLASS PROSPECTUS DATED DECEMBER 17, 1999, PERSONAL INVESTMENT
 CLASS PROSPECTUS DATED DECEMBER 17, 1999, PRIVATE INVESTMENT CLASS PROSPECTUS
 DATED DECEMBER 17, 1999, RESERVE CLASS PROSPECTUS DATED DECEMBER 17, 1999 AND
               RESOURCE CLASS PROSPECTUS DATED DECEMBER 17, 1999

                                      A-1
<PAGE>

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                            PAGE
                                                                            ----
      <S>                                                                   <C>
      Introduction......................................................... A-3
      General Information about the Fund................................... A-3
        The Fund and Its Shares............................................ A-3
        Directors and Officers............................................. A-5
        Remuneration of Directors.......................................... A-7
        AIM Funds Retirement Plan for Eligible Directors/Trustees.......... A-8
        Deferred Compensation Agreements................................... A-8
        Investment Advisor................................................. A-8
        Administrator...................................................... A-9
        Expenses........................................................... A-10
        Transfer Agent and Custodian....................................... A-10
        Legal Matters...................................................... A-10
        Reports............................................................ A-10
        Sub-Accounting..................................................... A-10
        Principal Holders of Securities.................................... A-11
        Prime Portfolio.................................................... A-11
        Liquid Assets Portfolio............................................ A-13
      Share Purchases and Redemptions...................................... A-15
        Purchases and Redemptions.......................................... A-15
        Redemptions by the Fund............................................ A-16
        Net Asset Value Determination...................................... A-16
        The Distribution Agreement......................................... A-16
        Distribution Plan.................................................. A-17
        Banking Regulations................................................ A-18
        Performance Information............................................ A-18
        Redemptions in Kind................................................ A-19
      Investment Program and Restrictions.................................. A-20
        Investment Program................................................. A-20
        Descriptions of Money Market Obligations........................... A-21
        Eligible Securities................................................ A-22
        Commercial Paper Ratings........................................... A-22
        Bond Ratings....................................................... A-23
        Investment Restrictions............................................ A-24
      Portfolio Transactions and Brokerage................................. A-25
        General Brokerage Policy........................................... A-25
        Allocation of Portfolio Transactions............................... A-26
        Section 28(e) Standards............................................ A-26
      Dividends, Distributions and Tax Matters............................. A-27
        Dividends and Distributions........................................ A-27
        Tax Matters........................................................ A-27
        Qualification as a Regulated Investment Company.................... A-27
        Excise Tax on Regulated Investment Companies....................... A-28
        Portfolio Distributions............................................ A-28
        Sale or Redemption of Shares....................................... A-29
        Foreign Shareholders............................................... A-29
        Effect of Future Legislation; Local Tax Considerations............. A-29
      Financial Statements.................................................   FS
</TABLE>

                                      A-2
<PAGE>

                                 INTRODUCTION

  The Liquid Assets Portfolio (the "Portfolio") is an investment portfolio of
Short-Term Investments Co. (the "Fund"), a mutual fund. The rules and
regulations of the United States Securities and Exchange Commission (the
"SEC") require all mutual funds to furnish prospective investors certain
information concerning the activities of the fund being considered for
investment. This information is included in the Cash Management Class
Prospectus dated December 17, 1999, the Institutional Class Prospectus dated
December 17, 1999, the Personal Investment Class Prospectus dated December 17,
1999, the Private Investment Class Prospectus dated December 17, 1999, the
Reserve Class Prospectus dated December 17, 1999 and the Resource Class
Prospectus dated December 17, 1999 (each a "Prospectus"). Copies of each
Prospectus and additional copies of this Statement of Additional Information
may be obtained without charge by writing the distributor of the Portfolio's
shares, Fund Management Company ("FMC"), 11 Greenway Plaza, Suite 100,
Houston, Texas 77046-1173 or by calling (800) 659-1005. Investors must receive
a Prospectus before they invest.

  This Statement of Additional Information is intended to furnish prospective
investors with additional information concerning the Fund and each class of
the Portfolio. Some of the information required to be in this Statement of
Additional Information is also included in each Prospectus; thus, in order to
avoid repetition, reference will be made to sections of the applicable
Prospectus. Additionally, each Prospectus and this Statement of Additional
Information omit certain information contained in the registration statement
filed with the SEC. Copies of the registration statement, including items
omitted from each Prospectus and this Statement of Additional Information, may
be obtained from the SEC by paying the charges prescribed under its rules and
regulations.

                      GENERAL INFORMATION ABOUT THE FUND

THE FUND AND ITS SHARES

  The Fund is an open-end, diversified series management investment company
which was organized as a corporation under the laws of the State of Maryland
on May 3, 1993, and had no operations prior to November 4, 1993. Shares of
common stock of the Fund are redeemable at their net asset value at the option
of the shareholder or at the option of the Fund in certain circumstances. For
information concerning the methods of redemption and the rights of share
ownership, investors should consult each Prospectus under the caption
"Redeeming Shares."

  The Fund offers on a continuous basis shares representing an interest in one
of two portfolios: the Portfolio and the Prime Portfolio (together, the
"Portfolios"). The Prime Portfolio consists of six classes of shares, each
having different shareholder qualifications and bearing expenses differently.
The Portfolio consists of the following six classes of shares: Cash Management
Class, Institutional Class, Personal Investment Class, Private Investment
Class, Reserve Class and Resource Class. Each such class has different
shareholder qualifications and bears expenses differently. This Statement of
Additional Information and the associated Prospectuses relate to each class of
the Portfolio. The classes of the Prime Portfolio are offered pursuant to
separate prospectuses and a separate statement of additional information.

  As used in each Prospectus, the term "majority of the outstanding shares" of
the Fund, a particular portfolio or a particular class means, respectively,
the vote of the lesser of (i) 67% or more of the shares of the Fund, such
portfolio or such class present at a meeting of the Fund's shareholders, if
the holders of more than 50% of the outstanding shares of the Fund, such
portfolio or such class are present or represented by proxy, or (ii) more than
50% of the outstanding shares of the Fund, such portfolio or such class.

  Shareholders of the Fund do not have cumulative voting rights, and therefore
the holders of more than 50% of the outstanding shares of the Fund voting
together for election of directors can elect all of the members of the Board
of Directors of the Fund. In such event, the remaining holders cannot elect
any members of the Board of Directors of the Fund.

  There are no preemptive or conversion rights applicable to any of the Fund's
shares. The Fund's shares, when issued, will be fully paid and non-assessable.
Shares are fully assignable and subject to encumbrance by a shareholder. The
Board of Directors may classify or reclassify any unissued shares of any class
or classes in addition to those already authorized by setting or changing in
any one or more respects, from time to time, prior to the issuance of such
shares, the preferences, conversion or other rights, voting powers,
restrictions, limitations as to dividends, qualifications, or terms or
conditions of redemption, of such shares. Any such classification or
reclassification will comply with the provisions of the Investment Company Act
of 1940, as amended (the "1940 Act").

  The Board of Directors may classify or reclassify any unissued shares of any
class or classes in addition to those already authorized by setting or
changing in any one or more respects, from time to time, prior to the issuance
of such shares, the preferences, conversion or other rights, voting powers,
restrictions, limitations as to dividends, qualifications, or terms or
conditions of redemption, of such shares. Any such classification or
reclassification will comply with the provisions of the 1940 Act.

  The Charter of the Fund authorizes the issuance of 60 billion shares with a
par value of $.001 each, of which 25 billion shares represent an interest in
the Portfolio (or class thereof) and 25 billion shares represent an interest
in the Prime Portfolio (or class thereof). A share of a portfolio (or class)

                                      A-3
<PAGE>

represents an equal proportionate interest in such portfolio (or class) with
each other share of that portfolio (or class) and is entitled to a
proportionate interest in the dividends and distributions from that portfolio
(or class).

  The assets received by the Fund for the issue or sale of shares of each of
the Portfolios and all income, earnings, profits, losses and proceeds
therefrom, subject only to the rights of creditors, are allocated to that
portfolio, and constitute the underlying assets of that portfolio. The
underlying assets of the Portfolios are segregated and each portfolio is
charged with the expenses with respect to that portfolio and with a share of
the general expenses of the Fund. While the expenses of the Fund are allocated
to the separate books of account of each of the Portfolios, certain expenses
may be legally chargeable against the assets of the entire Fund.

  The Charter provides that no director or officer of the Fund shall be liable
to the Fund or its shareholders for money damages, except (i) to the extent
that it is proved that such director or officer actually received an improper
benefit or profit in money, property or services, for the amount of the
benefit or profit in money, property or services actually received, or (ii) to
the extent that a judgment or other final adjudication adverse to such
director or officer is entered in a proceeding based on a finding in the
proceeding that such director's or officer's action, or failure to act, was
the result of active and deliberate dishonesty and was material to the cause
of action adjudicated in the proceeding. The foregoing shall not be construed
to protect or purport to protect any director or officer of the Fund against
any liability to the Fund or its shareholders to which such director or
officer would otherwise be subject by reason of willful misfeasance, bad
faith, gross negligence or reckless disregard of the duties involved in the
conduct of such office. The Fund shall indemnify and advance expenses to its
currently acting and its former directors to the fullest extent that
indemnification of directors is permitted by the Maryland General Corporation
Law. The Fund shall indemnify and advance expenses to its officers to the same
extent as its directors and to such further extent as is consistent with law.
The Board of Directors may by By-Law, resolution or agreement make further
provision for indemnification of directors, officers, employees and agents of
the Fund to the fullest extent permitted by the Maryland General Corporation
Law.

  As described in each Prospectus, the Fund will not normally hold annual
shareholders' meetings. At such time as less than a majority of the directors
have been elected by the shareholders, the directors then in office will call
a shareholders' meeting for the election of directors. Upon written request by
ten or more shareholders, who have been such for at least six months and who
hold shares constituting 1% of the outstanding shares, stating that such
shareholders wish to communicate with the other shareholders for the purpose
of obtaining the signatures necessary to demand a meeting to consider removal
of a director, the Fund has undertaken to provide a list of shareholders or to
disseminate appropriate materials (at the expense of the requesting
shareholders).

  Except as otherwise disclosed in each Prospectus and in this Statement of
Additional Information, the directors shall continue to hold office and may
appoint their successors.

  The overall management of the business and affairs of the Fund is vested
with its Board of Directors. The Board of Directors approves all significant
agreements between the Fund and persons or companies furnishing services to
the Fund, including agreements with the Fund's investment advisor,
distributor; custodian and transfer agent. The day-to-day operations of the
Fund are delegated to the Fund's officers and to A I M Advisors, Inc. ("AIM"),
subject always to the objective and policies of the Fund and to the general
supervision of the Fund's Board of Directors. Certain directors and officers
of the Fund are affiliated with AIM and A I M Management Group Inc. ("AIM
Management"), the parent corporation of AIM.

                                      A-4
<PAGE>

DIRECTORS AND OFFICERS

  The directors and officers of the Fund and their principal occupations
during at least the last five years are set forth below. Unless otherwise
indicated, the address of each director and officer is 11 Greenway Plaza,
Suite 100, Houston, Texas 77046.


<TABLE>
<CAPTION>
                                                                 PRINCIPAL OCCUPATION
                                            POSITIONS HELD     DURING AT LEAST THE PAST
          NAME, ADDRESS AND AGE            WITH REGISTRANT              5 YEARS
=======================================================================================
  <C>                                   <C>                    <S>
  *CHARLES T. BAUER (80)                Director and Chairman  Chairman of the Board of
                                                               Directors, A I M
                                                               Management Group Inc.,
                                                               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; and Executive
                                                               Vice Chairman and
                                                               Director, AMVESCAP PLC.

- ----------------------------------------------------------------------------------------
  BRUCE L. CROCKETT (55)                       Director        Director, ACE Limited
  906 Frome Lane                                               (insurance company).
  McLean, VA 22102                                             Formerly, Director,
                                                               President and Chief
                                                               Executive Officer,
                                                               COMSAT Corporation; and
                                                               Chairman, Board of
                                                               Governors of INTELSAT
                                                               (international
                                                               communications company).

- ----------------------------------------------------------------------------------------
  OWEN DALY II (75)                            Director        Director, Cortland Trust
  Six Blythewood Road                                          Inc. (investment
  Baltimore, MD 21210                                          company). Formerly,
                                                               Director, CF & I Steel
                                                               Corp., Monumental Life
                                                               Insurance Company and
                                                               Monumental General
                                                               Insurance Company; and
                                                               Chairman of the Board of
                                                               Equitable
                                                               Bancorporation.

- ----------------------------------------------------------------------------------------
  EDWARD K. DUNN, Jr. (64)                     Director        Chairman of the Board of
  2 Hopkins Plaza, 8th Floor, Suite 805                        Directors, Mercantile
  Baltimore, MD 21201                                          Mortgage Corp. Formerly,
                                                               Vice Chairman of the
                                                               Board of Directors and
                                                               President, Mercantile -
                                                               Safe Deposit & Trust
                                                               Co.; and President,
                                                               Mercantile Bankshares.

- ----------------------------------------------------------------------------------------
  JACK M. FIELDS (47)                          Director        Chief Executive Officer,
  8810 Will Clayton Parkway                                    Texana Global, Inc.
  Jetero Plaza, Suite E                                        (foreign trading
  Humble, TX 77338                                             company) and Twenty
                                                               First Century Group,
                                                               Inc. (a governmental
                                                               affairs company).
                                                               Formerly, Member of the
                                                               U.S. House of
                                                               Representatives.

- ----------------------------------------------------------------------------------------
  **CARL FRISCHLING (62)                       Director        Partner, Kramer Levin
   919 Third Avenue                                            Naftalis & Frankel LLP
   New York, NY 10022                                          (law firm). Formerly,
                                                               Partner, Reid & Priest
                                                               (law firm).

- ----------------------------------------------------------------------------------------
  *ROBERT H. GRAHAM (53)                Director and President Director, President and
                                                               Chief Executive Officer,
                                                               A I M 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.

- ----------------------------------------------------------------------------------------
  PREMA MATHAI-DAVIS (49)                      Director        Chief Executive Officer,
  350 Fifth Avenue, Suite 301                                  YWCA of the U.S.A.;
  New York, NY 10118                                           Commissioner, New York
                                                               City Department for the
                                                               Aging; and Member of the
                                                               Board of Directors,
                                                               Metropolitan
                                                               Transportation Authority
                                                               of New York State.

- ----------------------------------------------------------------------------------------
  LEWIS F. PENNOCK (57)                        Director        Attorney in private
  6363 Woodway, Suite 825                                      practice in Houston,
  Houston, TX 77057                                            Texas.

- ----------------------------------------------------------------------------------------
  LOUIS S. SKLAR (60)                          Director        Executive Vice
  Transco Tower, 50th Floor                                    President, Development
  2800 Post Oak Blvd.                                          and Operations, Hines
  Houston, TX 77056                                            Interests Limited
                                                               Partnership (real estate
                                                               development).
- ----------------------------------------------------------------------------------------
</TABLE>

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

                                      A-5
<PAGE>


<TABLE>
<CAPTION>
                             POSITIONS HELD      PRINCIPAL OCCUPATION DURING AT
   NAME, ADDRESS AND AGE     WITH REGISTRANT         LEAST THE PAST 5 YEARS
===============================================================================
  <C>                     <C>                   <S>
  GARY T. CRUM (52)       Senior Vice President Director and President, A I M
                                                Capital Management, Inc.;
                                                Director and Executive Vice
                                                President, A I M Management
                                                Group Inc.; Director and Senior
                                                Vice President, A I M Advisors,
                                                Inc.; and Director, A I M
                                                Distributors, Inc. and AMVESCAP
                                                PLC.

- -------------------------------------------------------------------------------
  CAROL F. RELIHAN (45)   Senior Vice President Director, Senior Vice
                              and Secretary     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; General
                                                Counsel and Vice President,
                                                A I M Fund Services, Inc.; and
                                                Vice President, A I M Capital
                                                Management, Inc., and A I M
                                                Distributors, Inc.

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

- -------------------------------------------------------------------------------
  MELVILLE B. COX (56)       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.

- -------------------------------------------------------------------------------
  KAREN DUNN KELLEY (39)     Vice President     Senior Vice President, A I M
                                                Capital Management, Inc. and
                                                Vice President, A I M Advisors,
                                                Inc.

- -------------------------------------------------------------------------------
  J. ABBOTT SPRAGUE (44)     Vice President     Director and President, Fund
                                                Management Company; Director,
                                                A I M Fund Services, Inc.; and
                                                Senior Vice President, A I M
                                                Advisors, Inc. and A I M
                                                Management Group Inc.
- --------------------------------------------------------------------------------
</TABLE>


                                      A-6
<PAGE>

  The Board of Directors has an Audit Committee, an Investments Committee, and
a Nominating and Compensation Committee.

  The members of the Audit Committee are Messrs. Crockett, Daly, Dunn
(Chairman), Fields, Frischling, Pennock, Sklar and Dr. Mathai-Davis. The Audit
Committee is responsible for meeting with the Fund's auditors to review audit
procedures and results and to consider any matters arising from an audit to be
brought to the attention of the directors as a whole with respect to the
Fund's fund accounting or its internal accounting controls, or for considering
such matters as may from time to time be set forth in a charter adopted by the
Board of Directors and such Committee.

  The members of the Investments Committee are Messrs. Bauer, Crockett, Daly,
Dunn, Fields, Frischling, Pennock, Sklar (Chairman) and Dr. Mathai-Davis. The
Investments Committee is responsible for reviewing portfolio compliance,
brokerage allocation, portfolio investment pricing issues, interim dividend
and distribution issues, or considering such matters as may from time to time
be set forth in a charter adopted by the Board of Directors and such
Committee.

  The members of the Nominating and Compensation Committee are Messrs.
Crockett (Chairman), Daly, Dunn, Fields, Pennock, Sklar and Dr. Mathai-Davis.
The Nominating and Compensation Committee is responsible for considering and
nominating individuals to stand for election as directors who are not
interested persons as long as the Fund maintains a distribution plan pursuant
to rule 12b-1 under the 1940 Act, reviewing from time to time the compensation
payable to the disinterested directors, or considering such matters as may
from time to time be set forth in a charter adopted by the board and such
Committee.

  All of the Fund's directors also serve as directors or trustees of some or
all of the other investment companies managed or advised by AIM. All of the
Fund's executive officers hold similar offices with some or all of such
investment companies.

REMUNERATION OF DIRECTORS

  Each director is reimbursed for expenses incurred in connection with each
meeting of the Board of Directors or any committee thereof. Each director who
is not also an officer of the Fund is compensated for his or her services
according to a fee schedule which recognizes the fact that such director also
serves as director or trustee of certain other regulated investment companies
managed, administered or distributed by AIM or its affiliates (the "AIM
Funds"). Each such director receives a fee, allocated among the AIM Funds for
which he or she serves as a director or trustee, which consists of an annual
retainer component and a meeting fee component.

  Set forth below is information regarding compensation paid or accrued for
each director of the Fund:

<TABLE>
<CAPTION>
                                                       RETIREMENT      TOTAL
                                         AGGREGATE      BENEFITS    COMPENSATION
                                        COMPENSATION   ACCRUED BY     FROM ALL
                                            FROM          ALL           AIM
               DIRECTOR                    FUND(1)     AIM FUNDS(2)   FUNDS(3)
===============================================================================
<S>                                     <C>          <C>            <C>
Charles T. Bauer.......................       -0-            -0-          -0-
- -------------------------------------------------------------------------------
Bruce L. Crockett......................    $9,888       $ 37,485      $96,000
- -------------------------------------------------------------------------------
Owen Daly II...........................     9,888        122,898       96,000
- -------------------------------------------------------------------------------
Edward K Dunn, Jr......................     9,888            -0-       78,880
- -------------------------------------------------------------------------------
Jack M. Fields.........................     9,845         15,826       95,500
- -------------------------------------------------------------------------------
Carl Frischling(4).....................     9,844         97,791       95,500
- -------------------------------------------------------------------------------
Robert H. Graham.......................       -0-            -0-          -0-
- -------------------------------------------------------------------------------
John F. Kroeger(5).....................       731        107,896       91,654
- -------------------------------------------------------------------------------
Prema Mathai-Davis.....................     9,337            -0-       32,636
- -------------------------------------------------------------------------------
Lewis F. Pennock.......................     9,844         45,766       95,500
- -------------------------------------------------------------------------------
Ian W. Robinson(6).....................     5,857         94,442       94,500
- -------------------------------------------------------------------------------
Louis S. Sklar.........................     9,844         90,232       95,500
===============================================================================
</TABLE>
- -------
(1)   The total amount of compensation deferred by all directors of the Fund
      during the fiscal year ended August 31, 1999, including interest earned
      thereon, was $61,406.
(2)   During the fiscal year ended August 31, 1999, the total amount of expenses
      allocated to the Fund in respect of such retirement benefits was $96,514.
      Data reflects compensation earned for the calendar year ended December 31,
      1998.
(3)   Each director serves as a director or trustee of a total of 12 registered
      investment companies advised by AIM as of December 31, 1998. Data reflects
      compensation earned during the calendar year ended December 31, 1998.
(4)   The Fund paid the law firm of Kramer Levin Naftalis & Frankel LLP $15,490
      in legal fees for services provided to the Portfolio during the fiscal
      year ended August 31, 1999. Mr. Frischling, a director of the Fund, is a
      partner in such firm.
(5)   Mr. Kroeger was a director of the Fund until June 11, 1998, when he
      resigned. On that date he became a consultant to the Fund. Of the amount
      listed above, $0 was for compensation for services as a director and the
      remainder as a consultant. Mr. Kroeger passed away on November 26, 1998.
      Mr. Kroeger's widow will receive his pension as described below under "AIM
      Funds Retirement Plan for Eligible Directors/Trustees."
(6)   Mr. Robinson was a director until March 12, 1999, when he retired.

                                      A-7
<PAGE>

AIM FUNDS RETIREMENT PLAN FOR ELIGIBLE DIRECTORS/TRUSTEES

  Under the terms of the AIM Funds Retirement Plan for Eligible
Directors/Trustees (the "Plan"), each director (who is not an employee of any
of the AIM Funds, AIM Management or any of their affiliates) may be entitled
to certain benefits upon retirement from the Board of Directors. Pursuant to
the Plan, the normal retirement date is the date on which the eligible
director has attained age 65 and has completed at least five years of
continuous service with one or more of the regulated investment companies
managed, administered or distributed by AIM or its affiliates (the "Applicable
AIM Funds"). Each eligible director is entitled to receive an annual benefit
from the Applicable AIM Funds commencing on the first day of the calendar
quarter coincident with or following his date of retirement equal to a maximum
of 75% of the annual retainer paid or accrued by the Applicable AIM Funds for
such director during the twelve-month period immediately preceding the
director's retirement (including amounts deferred under a separate agreement
between the Applicable AIM Funds and the director) and based on the number of
such director's years of service (not in excess of 10 years of service)
completed with respect to any of the Applicable AIM Funds. Such benefit is
payable to each eligible director in quarterly installments. If an eligible
director dies after attaining the normal retirement date but before receipt of
any benefits under the Plan commences, the director's surviving spouse (if
any) shall receive a quarterly survivor's benefit equal to 50% of the amount
payable to the deceased director, for no more than ten years beginning the
first day of the calendar quarter following the date of the director's death.
Payments under the Plan are not secured or funded by any Applicable AIM Fund.

  Set forth below is a table that shows the estimated annual benefits payable
to an eligible director upon retirement assuming a specified level of
compensation and years of service classifications. The estimated credited
years of service as of August 31, 1999 for Messrs. Crockett, Daly, Dunn,
Fields, Frischling, Kroeger, Pennock, Robinson, Sklar and Dr. Mathai-Davis are
12, 12, 1, 2, 22, 20, 18, 11, 10 and 1 years, respectively.

                   ESTIMATED ANNUAL BENEFITS UPON RETIREMENT

<TABLE>
<CAPTION>
                                                               ANNUAL RETIREMENT
                                 NUMBER OF                       COMPENSATION
                                 YEARS  OF                        PAID BY ALL
                               SERVICE WITH                       APPLICABLE
                           APPLICABLE AIM FUNDS                    AIM FUNDS
                           --------------------                -----------------
             <S>                                               <C>
             10...............................................      $67,500
              9...............................................      $60,750
              8...............................................      $54,000
              7...............................................      $47,250
              6...............................................      $40,500
              5...............................................      $33,750
</TABLE>

DEFERRED COMPENSATION AGREEMENTS

  Messrs. Daly, Dunn, Fields, Frischling, Robinson and Sklar (for purposes of
this paragraph only, the "deferring directors") have each executed a Deferred
Compensation Agreement (collectively, the "Agreements"). Pursuant to the
Agreements, the deferring directors elected to defer receipt of 100% of their
compensation payable by the Fund, and such amounts are placed into a deferral
account. Currently, the deferring directors may select various AIM Funds in
which all or part of their deferral account shall be deemed to be invested.
Distributions from the deferring directors' deferral accounts will be paid in
cash, in generally equal quarterly installments over a period of five (5) or
ten (10) years (depending on the Agreement) beginning on the date the
deferring director's retirement benefits commence under the Plan. The Fund's
Board of Directors, in its sole discretion, may accelerate or extend the
distribution of such deferral accounts after the deferring director's
termination of service as a director of the Fund. If a deferring director dies
prior to the distribution of amounts in his deferral account, the balance of
the deferral account will be distributed to his designated beneficiary in a
single lump sum payment as soon as practicable after such deferring director's
death. The Agreements are not funded and, with respect to the payments of
amounts held in the deferral accounts, the deferring directors have the status
of unsecured creditors of the Fund and of each other AIM Fund from which they
are deferring compensation.

  During the fiscal year ended August 31, 1999, $52,725 in directors' fees and
expenses were allocated to the Portfolio.

INVESTMENT ADVISOR

  AIM was organized in 1976 and, together with its subsidiaries, advises,
manages or administers over 125 investment portfolios encompassing a broad
range of investment objectives. AIM is a wholly owned subsidiary of AIM
Management, a holding company that has been engaged in the financial services
business since 1976. The address of AIM is 11 Greenway Plaza, Suite 100,
Houston, Texas 77046-1173. AIM Management is an indirect wholly owned
subsidiary of AMVESCAP PLC, 11 Devonshire Square, London EC2M 4YR, United
Kingdom. AMVESCAP PLC and its subsidiaries are an independent investment
management group engaged in institutional investment management and retail
fund businesses in the United States, Europe and the Pacific Region. Certain
of the directors and officers of AIM are also executive officers of the Fund
and their affiliations and addresses are shown under "Directors and Officers."

                                      A-8
<PAGE>

  FMC is a registered broker-dealer and a wholly owned subsidiary of AIM. FMC
acts as distributor of the shares of the Portfolio.

  AIM and the Fund have adopted a Code of Ethics which requires investment
personnel (a) to pre-clear all personal securities transactions subject to the
Code of Ethics, (b) to file reports regarding such transactions, (c) to
refrain from personally engaging in (i) short-term trading of a security, (ii)
transactions involving a security within seven days of an AIM Fund transaction
involving the same security, and (iii) transactions involving securities being
considered for investment by an AIM Fund and (d) to abide by certain other
provisions under the Code of Ethics. The Code of Ethics also prohibits
investment personnel and all other AIM employees from purchasing securities in
an initial public offering. Personal trading reports are reviewed periodically
by AIM, and the Board of Directors reviews quarterly and annual reports
(including information on any substantial violations of the Code of Ethics).
Sanctions for violations of the Code of Ethics may include censure, monetary
penalties, suspension or termination of employment.

  The Fund has entered into a Master Investment Advisory Agreement (the
"Advisory Agreement") with AIM. The Advisory Agreement will continue from year
to year, provided that it is specifically approved at least annually by the
Fund's Board of Directors and the affirmative vote of a majority of the
directors who are not parties to the Advisory Agreement or "interested
persons" of any such party by votes cast in person at a meeting called for
such purpose. The Fund or AIM may terminate the Advisory Agreement on 60 days'
written notice without penalty. The Advisory Agreement terminates
automatically in the event of its "assignment," as defined in the 1940 Act.

  Pursuant to the terms of the Advisory Agreement, AIM manages the investment
of the Portfolio's assets. AIM obtains and evaluates economic, statistical and
financial information to formulate and implement investment policies for the
Portfolio. Any investment program undertaken by AIM will at all times be
subject to the policies and control of the Fund's Board of Directors. AIM
shall not be liable to the Fund or its shareholders for any act or omission by
AIM or for any loss sustained by the Fund or its shareholders except in the
case of willful misfeasance, bad faith, gross negligence or reckless disregard
of duty.

  As compensation for its services with respect to the Portfolio, AIM receives
a fee at the annual rate of 0.15% of the average daily net assets of the
Portfolio. The Advisory Agreement requires AIM to reduce its fee to the extent
required to satisfy any expense limitations imposed by the securities laws or
regulations thereunder of any state in which the Portfolio's shares are
qualified for sale.

  Pursuant to the Advisory Agreement between the Fund and AIM currently in
effect and under an investment advisory agreement in effect prior to February
28, 1997 which provided for the same level of compensation to AIM, AIM
received fees from the Fund for the fiscal years ended August 31, 1999, 1998
and 1997, with respect to the Portfolio, in the amounts of $3,598,269,
$1,927,994 and $1,024,843, respectively. During the fiscal years ended August
31, 1999, 1998 and 1997 AIM voluntarily waived fees with respect to the
Portfolio in the amounts of $6,215,196, $4,309,476 and $3,344,852,
respectively.

  AIM may from time to time waive or reduce its fee. Voluntary fee waivers or
reductions may be rescinded at any time without further notice to investors.
During periods of voluntary fee waivers or reductions, AIM will retain its
ability to be reimbursed for such fee prior to the end of each fiscal year.
Contractual fee waivers or reductions set forth in the Fee Table in a
Prospectus may not be terminated or amended to the Portfolio's detriment
during the period stated in the agreement between AIM and the Fund.

  The Advisory Agreement provides that, upon the request of the Board of
Directors, AIM may perform (or arrange for the performance of) certain
additional services on behalf of the Portfolio which are not required by the
Advisory Agreement. AIM may receive reimbursement or reasonable compensation
for such additional services, as may be agreed upon by AIM and the Board of
Directors, based upon a finding by the Board of Directors that the provision
of such services would be in the best interest of the Portfolio and its
shareholders. The Board of Directors has made such a finding and, accordingly,
the Fund has entered into the Master Administrative Services Agreement under
which AIM will provide the additional services described below under the
caption "Administrator."

ADMINISTRATOR

  AIM also acts as the Portfolio's administrator pursuant to a Master
Administrative Services Agreement between AIM and the Fund (the
"Administrative Services Agreement").

  Under the Administrative Services Agreement, AIM performs, or arranges for
the performance of, accounting and other administrative services for the
Portfolio, which are not required to be performed by AIM under the Advisory
Agreement. As full compensation for the performance of such services, AIM is
reimbursed for any personnel and other costs (including applicable office
space, facilities and equipment) of furnishing the services of a principal
financial officer of the Fund and of persons working under his supervision for
maintaining the financial accounts and books and records of the Fund,
including calculation of the Portfolio's daily net asset value, and preparing
tax returns and financial statements for the Portfolio. The method of
calculating such reimbursements must be annually approved, and the amounts
paid will be periodically reviewed, by the Fund's Board of Directors.

                                      A-9
<PAGE>

  Under the Administrative Services Agreement and under a prior administrative
services agreement which provided for the same level of reimbursement to AIM,
AIM was reimbursed for the fiscal years ended August 31, 1999, 1998 and 1997
in the amounts of $155,139, $85,337 and $68,372, respectively.

EXPENSES

  Expenses of the Fund include, but are not limited to, fees paid to AIM under
the Advisory Agreement, the charges and expenses of any registrar, any
custodian or depositary appointed by the Fund for the safekeeping of cash,
portfolio securities and other property, and any transfer, dividend or
accounting agent or agents appointed by the Fund; brokers' commissions
chargeable to the Fund in connection with portfolio securities transactions to
which the Fund is a party; all taxes, including securities issuance and
transfer taxes, and fees payable by the Fund to federal, state or other
governmental agencies; the costs and expenses of engraving or printing of
certificates representing shares of the Fund; all costs and expenses in
connection with the registration and maintenance of registration of the Fund
and shares with the SEC and various states and other jurisdictions (including
filing and legal fees and disbursements of counsel); the costs and expenses of
printing, including typesetting, and distributing prospectuses and statements
of additional information of the Fund and supplements thereto to the Fund's
shareholders; all expenses of shareholders' and directors' meetings and of
preparing, printing and mailing of prospectuses, proxy statements and reports
to shareholders; fees and travel expenses of directors and director members of
any advisory board or committee; all expenses incident to the payment of any
dividend, distribution, withdrawal or redemption, whether in shares or in
cash; charges and expenses of any outside service used for pricing of the
Fund's shares; charges and expenses of legal counsel, including counsel to the
directors of the Fund who are not "interested persons" (as defined in the 1940
Act) of the Fund or AIM, and of independent accountants in connection with any
matter relating to the Fund; membership dues of industry associations;
interest payable on Fund borrowings; postage; insurance premiums on property
or personnel (including officers and directors) of the Fund which inure to its
benefit; and extraordinary expenses (including, but not limited to, legal
claims and liabilities and litigation costs and any indemnification related
thereto). FMC bears the expenses of printing and distributing prospectuses and
statements of additional information (other than those prospectuses and
statements of additional information distributed to existing shareholders of
the Fund) and any other promotional or sales literature used by FMC or
furnished by FMC to purchasers or dealers in connection with the public
offering of the Fund's shares.

  Expenses of the Fund which are not directly attributable to the operations
of either of the Portfolios are prorated among all classes of the Fund.
Expenses of the Fund except those listed below are prorated among all classes
of such Portfolios. Distribution and service fees, transfer agency fees and
shareholder recordkeeping fees which are directly attributable to a specific
class of shares are charged against the income available for distribution as
dividends to the holders of such shares.

TRANSFER AGENT AND CUSTODIAN

  A I M Fund Services, Inc. ("AFS"), a wholly owned subsidiary of AIM, P. O.
Box 4497, Houston, Texas 77210-4497, serves as a transfer agent and dividend
disbursing agent for the shares of all classes of the Portfolio pursuant to a
Transfer Agency and Service Agreement and receives an annual fee from the Fund
for its services in such capacity in the amount of 0.009% of average daily net
assets of the Portfolio, payable monthly. Such compensation may be changed
from time to time as is agreed to by AFS and the Fund.

  The Bank of New York ("BONY"), 90 Washington Street, 11th Floor, New York,
New York 10286, acts as custodian for the portfolio securities and cash of the
Portfolio. BONY receives such compensation from the Fund for its services in
such capacity as is agreed to from time to time by BONY and the Fund.

LEGAL MATTERS

  The law firm of Ballard Spahr Andrews & Ingersoll, LLP, Philadelphia,
Pennsylvania serves as counsel to the Fund.

REPORTS

  The Fund furnishes shareholders with semi-annual reports containing
information about the Fund and its operations, including a schedule of
investments held in the Portfolio and its financial statements. The annual
financial statements are audited by the Fund's independent auditors. The Board
of Directors has selected KPMG LLP, 700 Louisiana, Houston, Texas 77002, as
the independent auditors to audit the financial statements and review the tax
returns of the Portfolio.

  Duplicate confirmations may be transmitted to the beneficial owner of the
sub-account if requested by the institution. The institution will receive a
monthly statement setting forth, for each sub-account, the share balance,
income earned for the month, income earned for the year to date and the total
current value of the account.

SUB-ACCOUNTING

  The Fund and FMC have arranged for AFS or the Portfolio to offer sub-
accounting services to shareholders of the Portfolio and to maintain
information with respect to the underlying beneficial ownership of the shares
of each class of the Portfolio. Investors who purchase shares of the Portfolio
for the account of others can make arrangements through the Fund or FMC for
these sub-accounting services. In addition, shareholders utilizing certain
versions of AIM LINK--Registered Trademark--Remote, a personal computer
application software product, may receive sub-accounting services via such
software.

                                     A-10
<PAGE>

PRINCIPAL HOLDERS OF SECURITIES

PRIME PORTFOLIO

  To the best knowledge of the Fund, the names and addresses of the holders of
5% or more of the outstanding shares of each class of the Prime Portfolio as
of November 1, 1999, and the percentage of the Prime Portfolio's outstanding
shares owned by such shareholders as of such date are as follows:

<TABLE>
<CAPTION>
                                                    PERCENT      PERCENT OWNED
                 NAME AND ADDRESS                   OWNED OF     OF RECORD AND
                  OF RECORD OWNER                RECORD ONLY(a) BENEFICIALLY(a)
                 ----------------                -------------- ---------------
   CASH MANAGEMENT CLASS
   ---------------------
   <S>                                           <C>            <C>
    BANK OF NEW YORK............................     30.14%            --
     One Wall Street 5th Floor
     Stif/Master Note
     New York, NY 10286

    CIBC WORLD MARKETS..........................     14.85%            --
     200 Liberty Street
     World Financial Center
     Attn: Lester Elson
     New York, NY 10281

    IGT.........................................      8.92%            --
     P.O. Box 10120
     Reno, NV 89502

    BOST & CO FBO THE KWELM PARTNERSHIP.........      7.13%            --
     P.O. Box 3198
     Attn: Mutual Fund Operations
     Pittsburgh, PA 15230-3198

    BANK ONE, ILLINOIS, NA......................      6.71%            --
     Attn: Tony Long
     525 W. Monroe
     Suite 0256, 6th Floor
     Chicago, IL 60670

    MELLON BANK NA..............................      5.39%            --
     Attn: Cynthia Kieffer
     P.O. Box 710
     Pittsburgh, PA 15230-0710

   INSTITUTIONAL CLASS
   ---------------------------------------------

    AIM FUND OF FUNDS ACCOUNT...................     31.02%(b)         --
     Attn: Stacey Frakes
     Money Market Portfolio Admin.
     11 Greenway Plaza, Ste 100
     Houston, TX 77046

    COMERICA BANK...............................      6.33%            --
     P.O. Box 75000
     Attn: Vicky Froehlich
     Detroit, MI 48275-3455

    TRULIN & CO. ...............................      5.76%            --
     P.O. Box 1412
     Attn: Pat Whalen
     Rochester, NY 14603
</TABLE>
- -------
(a) The Fund has no knowledge as to whether all or any portion of the shares
    of the class owned of record are also owned beneficially.
(b) A shareholder who holds 25% or more of the outstanding shares of a
    Portfolio may be presumed to be in "control" of such Portfolio as defined
    in the 1940 Act.

                                     A-11
<PAGE>

<TABLE>
<CAPTION>
                                                     PERCENT      PERCENT OWNED
                  NAME AND ADDRESS                   OWNED OF     OF RECORD AND
                  OF RECORD OWNER                 RECORD ONLY(a) BENEFICIALLY(a)
                  ----------------                -------------- ---------------

   <S>                                            <C>            <C>
    FROST NATIONAL BANK TX.......................      5.08%            --
     Muir & Co.
     C/O Frost
     P.O. Box 2479
     San Antonio, TX 78298-2479
</TABLE>

<TABLE>
   <S>                                                                <C>    <C>
   PERSONAL INVESTMENT CLASS
   -------------------------

    CULLEN/FROST DISCOUNT BROKERS.................................... 84.50%  --
     Attn: Karen Banks
     P.O. Box 2358
     San Antonio, TX 78299
</TABLE>

<TABLE>
   <S>                                                                 <C>   <C>
    FIRST INTERSTATE - MONTANA........................................ 5.86%  --
     Attn: Cheri Melvin
     P.O. Box 30918
     Billings, MT 59116
</TABLE>

<TABLE>
   <S>                                                                <C>    <C>
   PRIVATE INVESTMENT CLASS
   ------------------------

    HUNTINGTON CAPITAL CORP.......................................... 34.31%  --
     41 S. High St., Ninth Floor
     Columbus, OH 43287
</TABLE>

<TABLE>
   <S>                                                                <C>    <C>
    HARRIS TRUST & SAVINGS BANK...................................... 18.06%  --
     Attn: Rich Croll
     111 West Monroe St.
     Lower Level East
     Chicago, IL 60690
</TABLE>

<TABLE>
   <S>                                                                 <C>   <C>
    CULLEN/FROST DISCOUNT BROKERS..................................... 9.46%  --
     Attn: Karen Banks
     P.O. Box 2358
     San Antonio, TX 78299
</TABLE>

<TABLE>
   <S>                                                                 <C>   <C>
    FROST NATIONAL BANK............................................... 7.21%  --
     Muir & Co.
     C/O Frost
     P.O. Box 2479
     San Antonio, TX 78298-2479
</TABLE>

<TABLE>
   <S>                                                                 <C>   <C>
    HAWS & COMPANY.................................................... 6.54%  --
     Attn: Saundra L. Foe
     P.O. Box 5847
     Denver, CO 80217
</TABLE>

<TABLE>
   <S>                                                               <C>    <C>
   RESERVE CLASS
   -------------

    BANK OF NEW YORK................................................ 99.89%  --
     Attn: Sheryl Covelli
     440 Mamoroneck, 5th Fl.
     Harrison, NY 10286
</TABLE>

<TABLE>
   <S>                                                               <C>    <C>
   RESOURCE CLASS
   --------------

    FIRST UNION SECURITIES, INC. ................................... 25.30%  --
     Attn: Money Funds
     8739 Research Drive
     Capital Markets
     Charlotte, NC 28262-0675
</TABLE>
- --------
(a) The Fund has no knowledge as to whether all or any portion of the shares
    of the class owned of record are also owned beneficially.

                                     A-12
<PAGE>

<TABLE>
<CAPTION>
                                                     PERCENT      PERCENT OWNED
                  NAME AND ADDRESS                   OWNED OF     OF RECORD AND
                  OF RECORD OWNER                 RECORD ONLY(a) BENEFICIALLY(a)
                  ----------------                -------------- ---------------

   <S>                                            <C>            <C>
    HARRIS METHODIST HEALTH SYSTEM...............     18.95%            --
     Attn: Sandy Reeves
     600 East Las Colinas Blvd., Ste. 1550
     Irving, TX 75039

    CIBC WORLD MARKETS...........................     11.99%            --
     200 Liberty Street
     World Financial Center
     Attn: Lester Elson
     New York, NY 10281

    HAMBRECHT & QUIST LLC........................     11.85%            --
     Attn: Matt Dermer
     230 Park Avenue, Floor 19
     New York, NY 10169

    MELLON BANK NA...............................      9.21%            --
     Attn: Cynthia Kieffer
     P.O. Box 710
     Pittsburgh, PA 15230-0710

    NVIDIA CORPORATION CASH MGMT ACCOUNT.........      5.16%            --
     3535 Monroe Street
     Santa Clara, CA 95051
</TABLE>
- -------
(a) The Fund has no knowledge as to whether all or any portion of the shares
    of the class owned of record are also owned beneficially.


LIQUID ASSETS PORTFOLIO

  To the best of the knowledge of the Fund, the names and addresses of the
holders of 5% or more of the outstanding shares of each class of the Portfolio
as of November 1, 1999, and the percentage of the Portfolio's outstanding
shares owned by such shareholders as of such date are as follows:

<TABLE>
<CAPTION>
                                                    PERCENT      PERCENT OWNED
                 NAME AND ADDRESS                   OWNED OF     OF RECORD AND
                  OF RECORD OWNER                RECORD ONLY(a) BENEFICIALLY(a)
                 ----------------                -------------- ---------------
   CASH MANAGEMENT CLASS
   ---------------------

   <S>                                           <C>            <C>
    CIBC WORLD MARKETS..........................     21.24%            --
     200 Liberty Street
     World Financial Center
     Attn: Lester Elson
     New York, NY 10281

    GATEWAY, INC. ..............................     16.65%            --
     Corp. Treasury/Y-15
     610 Gateway Drive
     N. Sioux City, SD 57049-2000

    BANK OF NEW YORK............................     10.70%            --
     One Wall Street
     5th Floor
     Stif/Master Note
     New York, NY 10286

    FIRST UNION SUBACCOUNTS.....................      6.58%            --
     8739 Research Drive
     Capital Markets
     Charlotte, NC 28262-0675

</TABLE>
- -------
(a) The Fund has no knowledge as to whether all or any portion of the shares
    of the class owned of record are also owned beneficially.

                                     A-13
<PAGE>

<TABLE>
<CAPTION>
                                                     PERCENT      PERCENT OWNED
                  NAME AND ADDRESS                   OWNED OF     OF RECORD AND
                  OF RECORD OWNER                 RECORD ONLY(a) BENEFICIALLY(a)
                  ----------------                -------------- ---------------
   <S>                                            <C>            <C>
    HAMBRECHT & QUIST LLC........................      6.47%            --
     Attn: Matt Dermer
     230 Park Avenue, Floor 19
     New York, NY 10169

    HARRIS TRUST & SAVINGS BANK..................      5.81%            --
     Attn: Rich Croll
     111 West Monroe St.
     Lower Level East
     Chicago, IL 60690

    SOUTHWEST BANK OF TEXAS, N.A. 498A1..........      5.00%            --
     Attn: Kathy Jensen
     4400 Post Oak Pkwy.
     Houston, TX 77027

<CAPTION>
   INSTITUTIONAL CLASS
   -------------------
   <S>                                            <C>            <C>
    AIM FUND OF FUNDS ACCOUNT....................     26.95%            --
     Attn: Stacey Frakes
     Money Market Portfolio Admin.
     11 Greenway Plaza, Ste. 100
     Houston, TX 77046

    PAINE WEBBER SSB.............................      8.50%            --
     1000 Harbor Blvd., 6th Floor
     Mutual Fund Operations
     State Street Custodial Accounts
     Weehawken, NJ 07087-6790

    TURTLE & CO. SWEEP...........................      7.53%            --
     Attn: Richard Ramer
     P.O. Box 9427
     Boston, MA 02209

    BZW BARCLAYS GLOBAL INVESTORS, AS AGENT......      7.45%            --
     Attn: Mike Futamase
     980 9th St., Suite 600
     Sacramento, CA 95814

<CAPTION>
   PERSONAL INVESTMENT CLASS
   -------------------------
   <S>                                            <C>            <C>
    HUNTINGTON INVESTMENT 112....................     83.03%            --
     135 North Pennsylvania, Suite 800
     Indianapolis, IN 46204

    TEXAS CAPITAL BANK, N.A. ....................      9.61%            --
     Attn: Kitty Ramzy
     2100 McKinney Ave., Ste. 900
     Dallas, TX 75201

<CAPTION>
   PRIVATE INVESTMENT CLASS
   ------------------------
   <S>                                            <C>            <C>
    BANK OF NEW YORK.............................     60.75%            --
     One Wall Street
     5th Floor
     Stif/Master Note
     New York, NY 10286

    MELLON BANK N.A. ............................     14.71%            --
     Attn: Cynthia Kieffer
     P.O. Box 710
     Pittsburgh, PA 15230-0710
</TABLE>
- --------
(a)The Fund has no knowledge as to whether all or any portion of the shares of
   the class owned of record are also owned beneficially.

                                     A-14
<PAGE>

<TABLE>
<CAPTION>
                                                     PERCENT      PERCENT OWNED
                  NAME AND ADDRESS                   OWNED OF     OF RECORD AND
                  OF RECORD OWNER                 RECORD ONLY(a) BENEFICIALLY(a)
                  ----------------                -------------- ---------------

   <S>                                            <C>            <C>
    HUNTINGTON CAPITAL CORP......................     13.74%            --
     41 S. High St., Ninth Floor
     Columbus, OH 43287

<CAPTION>
   RESOURCE CLASS
   --------------

   <S>                                            <C>            <C>
    HAMBRECHT & QUIST LLC........................     52.50%            --
     Attn: Matt Dermer
     230 Park Avenue, Floor 19
     New York, NY 10169

    CIBC WORLD MARKETS...........................     42.77%            --
     200 Liberty Street
     World Financial Center
     Attn: Lester Elson
     New York, NY 10281
</TABLE>
- -------
(a) The Fund has no knowledge as to whether all or any portion of the shares
    of the class owned of record are also owned beneficially.

  To the best of the knowledge of the Fund, as of November 1, 1999, the
directors and officers of the Fund as a group beneficially owned less than 1%
of each class of either Portfolio's outstanding shares.

                        SHARE PURCHASES AND REDEMPTIONS

PURCHASES AND REDEMPTIONS

  A complete description of the manner by which shares of a particular class
may be purchased or redeemed appears in each Prospectus under the heading
"Purchasing Shares" and "Redeeming Shares."

  Prior to the initial purchase of Portfolio shares, an investor must complete
and send an Account Application to AFS at P.O. Box 4497, Houston, Texas 77210-
4497. An Account Application may be obtained from the distributor. An investor
may make changes to the information provided in the Account Application by
submitting such changes in writing to the transfer agent or by completing and
submitting to the transfer agent a new Account Application.

  The Fund reserves the right to reject any purchase order and to withdraw all
or any part of the offering made by a Prospectus. Any funds received with
respect to an order which is not accepted by the Fund and any funds received
for which an order has not been received will be promptly returned to an
investor. Any request for correction to a transaction of Portfolio shares must
be submitted in writing to AFS. AFS reserves the right to reject any such
request. When a correction results in a dividend adjustment, the institution
must agree in writing to reimburse the Portfolio for any loss resulting from
the correction. Failure to deliver purchase proceeds on the requested
settlement date may result in a claim against the institution for an amount
equal to the overdraft charge incurred by the Portfolio. In the interest of
economy and convenience, certificates representing shares of the Class will
not be issued except upon written request to the Fund. Certificates (in full
shares only) will be issued without charge and may be redeposited at any time.

  An investor may terminate his relationship with an institution at any time,
in which case an account in the investor's name will be established directly
with the Portfolio and the investor will become a shareholder of record. In
such case, however, the investor will not be able to purchase additional
shares of the Cash Management Class, Personal Investment Class, Private
Investment Class, Reserve Class or the Resource Class directly, except through
reinvestment of dividends and distributions.

  Payment for redeemed shares of the Portfolio is normally made by Federal
Reserve wire to the commercial bank account designated in the shareholder's
Account Application on the day specified below, but may be remitted by check
upon request by a shareholder. A shareholder may change the bank account
designated to receive redemption proceeds by written notice to the Fund. The
authorized signature on the notice must be guaranteed by a commercial bank or
trust company (which may include the shareholder). Additional documentation
may be required when deemed appropriate by the Portfolio or AFS.

  The Fund may postpone the right of redemption only under unusual
circumstances, as allowed by the Securities and Exchange Commission, such as
when the New York Stock Exchange restricts or suspends trading.

                                     A-15
<PAGE>

  A "Business Day" of the Fund is any day on which member banks of the Federal
Reserve Bank of New York and The Bank of New York are open for business. If
AFS receives a redemption request on a Business Day prior to 5:00 p.m. Eastern
time, the redemption will be effected at the net asset value of the Portfolio
determined as of 5:00 p.m. Eastern time and the Fund will normally wire
redemption proceeds on that day. A redemption request received by AFS after
5:00 p.m. Eastern time will be effected at the net asset value of the
Portfolio determined as of 5:00 p.m. Eastern time on the next Business Day and
proceeds will normally be wired on the next Business Day. If proceeds are not
wired on the same day, shareholders will accrue dividends until the day the
proceeds are wired. The Fund, however, reserves the right to change the time
for which purchase and redemption orders must be submitted to and received by
the transfer agent for execution on the same day on any day when the primary
government securities dealers are either closed for business or close early,
or trading in money market securities is limited due to national holidays.

  Any request for correction to a redemption transaction of Portfolio shares
must be submitted in writing to AFS.

REDEMPTIONS BY THE FUND

  If the Fund determines that you have provided incorrect information in
opening an account or in the course of conducting subsequent transactions, the
Fund may, at its discretion, redeem the account and distribute the proceeds to
you.

  The Board of Directors may redeem shares if it determines in its sole
discretion that failure to so redeem may have materially adverse consequences
to the shareholders of the Portfolio.

NET ASSET VALUE DETERMINATION

  The net asset value per share of the Portfolio is determined as of 5:00 p.m.
Eastern time on each Business Day of the Fund. Shares of each class of the
Portfolio are sold at net asset value of such shares. Shareholders may at any
time redeem all or a portion of their shares at net asset value. The
investor's price for purchases and redemptions will be the net asset value
next determined following the receipt of an order to purchase or a request to
redeem shares.

  For the purpose of determining the price at which all shares of the
Portfolio are issued and redeemed, the net asset value per share is calculated
by: (a) valuing all securities and instruments of the Portfolio as set forth
below; (b) adding other assets of the Portfolio, if any; (c) deducting the
liabilities of the Portfolio; (d) dividing the resulting amount by the number
of shares outstanding of the Portfolio; and (e) rounding such per share net
asset value to the nearest whole cent. Among other items, the Portfolio's
liabilities include accrued expenses and dividends payable and its total
assets include portfolio securities valued at their market value as well as
income accrued but not yet received.

  The debt instruments held in the Portfolio are valued on the basis of
amortized cost. This method involves valuing an instrument at its cost and
thereafter assuming a constant amortization to maturity of any discount or
premium, regardless of the impact of fluctuating interest rates on the market
value of the instrument. While this method provides certainty in valuation, it
may result in periods during which value, as determined by amortized cost, is
higher or lower than the price the Fund would receive if it sold the entire
portfolio.

  The valuation of the portfolio instruments based upon their amortized cost
and the concomitant maintenance of the net asset value per share of $1.00 for
the Portfolio is permitted in accordance with applicable rules and regulations
of the SEC, including Rule 2a-7 under the 1940 Act, which require the
Portfolio to adhere to certain conditions. These rules require that the
Portfolio maintain a dollar-weighted average portfolio maturity of 90 days or
less, purchase only instruments having remaining maturities of 397 calendar
days or less and invest only in securities determined by the Board of
Directors to be "Eligible Securities" and to present minimal credit risk to
the Portfolio.

  The Board of Directors is required to establish procedures designed to
stabilize, to the extent reasonably practicable, the Portfolio's price per
share at $1.00 as computed for the purpose of sales and redemptions. Such
procedures include review of the Portfolio's holdings by the Board of
Directors, at such intervals as they may deem appropriate, to determine
whether the net asset value calculated by using available market quotations or
other reputable sources for the Portfolio deviates from $1.00 per share and,
if so, whether such deviation may result in material dilution or is otherwise
unfair to existing holders of the Portfolio's shares. In the event the Board
of Directors determines that such a deviation exists, it will take such
corrective action as the Board of Directors deems necessary and appropriate,
including the sales of portfolio instruments prior to maturity to realize
capital gains or losses or to shorten the average portfolio maturity; the
withholding of dividends; redemption of shares in kind; or the establishment
of a net asset value per share by using available market quotations.

THE DISTRIBUTION AGREEMENT

  The Fund has entered into a Master Distribution Agreement (the "Distribution
Agreement") with FMC, a registered broker-dealer and a wholly owned subsidiary
of AIM, to act as the exclusive distributor of the shares of each class of the
Portfolio. The address of FMC is 11 Greenway Plaza, Suite 100, Houston, Texas
77046-1173. See "General Information about the Fund--Directors and Officers"
and "General Information about the Fund--Investment Advisor" for information
as to the affiliation of certain directors and officers of the Fund with FMC,
AIM and AIM Management.

                                     A-16
<PAGE>

  The Distribution Agreement provides that FMC has the exclusive right to
distribute shares either directly or through other broker-dealers. The
Distribution Agreement also provides that FMC will pay promotional expenses,
including the incremental costs of printing prospectuses and statements of
additional information, annual reports and other periodic reports for
distribution to persons who are not shareholders of the Portfolio and the
costs of preparing and distributing any other supplemental sales literature.
FMC has not undertaken to sell any specified number of shares in the
Portfolio.

  The Distribution Agreement will continue from year to year, provided that it
is specifically approved at least annually by the Fund's Board of Directors
and the affirmative vote of the directors who are not parties to the
Distribution Agreement or "interested persons" of any such party by votes cast
in person at a meeting called for such purpose. The Fund or FMC may terminate
the Distribution Agreement on 60 days' written notice, without penalty. The
Distribution Agreement will terminate automatically in the event of its
"assignment," as defined in the 1940 Act.

  FMC may, from time to time, at its expense, pay a bonus or other
consideration or incentive to dealers or institutions who sell a minimum
dollar amount of the shares of a particular class during a specific period of
time. In some instances, these incentives may be offered only to certain
dealers or institutions who have sold or may sell significant amounts of
shares. The total amount of such additional bonus or payments or other
consideration shall not exceed 0.05% of the net asset value of the shares of
the class sold. Any such bonus or incentive programs will not change the price
paid by investors for the purchase of shares or the amount received as
proceeds from such sales. Dealers or institutions may not use sales of the
shares to qualify for any incentives to the extent that such incentives may be
prohibited by the laws of any jurisdiction.

DISTRIBUTION PLAN

  The Fund has adopted a Master Distribution Plan (the "Plan") pursuant to
Rule 12b-1 under the 1940 Act with respect to the Cash Management Class,
Personal Investment Class, Private Investment Class, Reserve Class and
Resource Class. The Plan provides that the Fund may compensate FMC in
connection with the distribution of shares of the Portfolio. Such compensation
may be expended when and if authorized by the Board of Directors and may be
used to finance such distribution-related services as expenses of organizing
and conducting sales seminars, printing of prospectuses and statements of
additional information (and supplements thereto) and reports for other than
existing shareholders, preparation and distribution of advertising material
and sales literature and costs of administering the Plan.

  Pursuant to the Plan, the Fund may enter into Shareholder Service Agreements
("Service Agreements") with selected broker-dealers, banks, other financial
institutions or their affiliates. Such firms may receive compensation from the
Portfolio for servicing investors as beneficial owners of the shares of the
Cash Management Class, Personal Investment Class, Private Investment Class,
Reserve Class and Resource Class of the Portfolio. These services may include
among other things: (i) answering customer inquiries regarding shares of these
classes and the Portfolio; (ii) assisting customers in changing dividend
options, account designations and addresses; (iii) performing sub-accounting;
(iv) establishing and maintaining shareholder accounts and records; (v)
processing purchase and redemption transactions; (vi) automatic investment of
customer cash accounting balances in shares of these classes; (vii) providing
periodic statements showing a customer's account balance and integrating such
statements with those of other transactions and balances in the customer's
other accounts serviced by such firm; (viii) arranging for bank wires; and
(ix) such other services as the Fund may request on behalf of shares of these
classes, to the extent such firms are permitted to engage in such services by
applicable statute, rule or regulation. The Plan may only be used for the
purposes specified above and as stated in the Plan. Expenses may not be
carried over from year to year.

  The Plan does not obligate the Fund to reimburse FMC for the actual expenses
FMC may incur in fulfilling its obligations under the Plan. Thus, even if
FMC's actual expenses exceed the fee payable to FMC thereunder at any given
time, the Fund will not be obligated to pay more than that fee. If FMC's
expenses are less than the fee it receives, FMC will retain the full amount of
the fee.

  FMC may from time to time waive or reduce any portion of its 12b-1 fee for
Cash Management Class, Personal Investment Class, Private Investment Class,
Reserve Class and Resource Class shares. Voluntary fee waivers or reductions
may be rescinded at any time without further notice to investors. During
periods of voluntary fee waivers or reductions, FMC will retain its ability to
be reimbursed for such fee prior to the end of each fiscal year. Contractual
fee waivers or reductions set forth in the Fee Table in a Prospectus may not
be terminated or amended to the Portfolio's detriment during the period stated
in the agreement between FMC and the Fund.

  The Plan requires the officers of the Fund to provide the Board of Directors
at least quarterly with a written report of the amounts expended pursuant to
the Plan and the purposes for which such expenditures were made. The Board of
Directors shall review these reports in connection with their decisions with
respect to the Plan.

  For the fiscal year ended August 31, 1999, FMC received compensation
pursuant to the Plan in the amount of $753,887, or an amount equal to 0.08% of
the average net daily assets of the Cash Management Class, $407, or an amount
equal to 0.10% of the average net daily assets of the Personal Investment
Class, $600,673, or an amount equal to 0.30% of the average net daily assets
of the Private Investment Class and $251,117, or an amount equal to 0.20% of
the average net daily assets of the Resource Class. With respect to the Cash
Management Class, $752,963 of such amount (or an amount equal to 0.08% of the
average daily net assets of the class) was paid to dealers and financial
institutions and $924 (or an amount equal to 0% of the average daily net asset
of the class) was retained by FMC. With respect to the Personal Investment
Class, $326 of such amount (or an amount equal to 0.08% of the average daily
net assets of the class) was paid to dealers and financial institutions and
$81 (or an amount equal to 0.01% of the average

                                     A-17
<PAGE>

daily net assets of the class) was retained by FMC. With respect to the
Private Investment Class, $582,747 of such amount (or an amount equal to 0.29%
of the average daily net assets of the class) was paid to dealers and
financial institutions and $17,926 (or an amount equal to 0.01% of the average
daily net assets of the class) was retained by FMC. With respect to the
Resource Class, $251,117 of such amount (or an amount equal to 0.20% of the
average daily net assets of the class) was paid to dealers and financial
institutions and $0 (or an amount equal to 0% of the average daily net assets
of the class) was retained by FMC.

  As required by Rule 12b-1 under the 1940 Act, the Plan has been approved by
the Board of Directors, including a majority of the directors who are not
"interested persons" (as defined in the 1940 Act) of the Fund and who have no
direct or indirect financial interest in the operation of the Plan or in any
agreements related to the Plan ("Qualified Directors"). In approving the Plan
in accordance with the requirements of Rule 12b-1, the directors considered
various factors and determined that there is a reasonable likelihood that the
Plan would benefit the Fund and the holders of shares of the applicable
classes of the Portfolio. Anticipated benefits that may result from the Plan
are: (i) FMC, brokerage firms and financial institutions will provide a
shareholder with rapid access to his account for the purpose of effecting
executions of purchase and redemption orders; (ii) FMC and shareholder service
agents will provide prompt, efficient and reliable responses to shareholder
inquiries concerning account status; (iii) a well-developed, dependable
network of shareholder service agents may help to curb sharp fluctuations in
rates of redemptions and sales, thereby reducing the chance that an
unanticipated increase in net redemptions could adversely affect the
performance of the Portfolio; and (iv) a successful distribution effort will
assist FMC in maintaining and increasing the organizational strength needed to
service the Portfolio.

  The Plan, unless sooner terminated in accordance with its terms, shall
continue in effect as to each applicable class from year to year as long as
such continuance is specifically approved at least annually by the Board of
Directors, including a majority of the Qualified Directors.

  FMC is a wholly owned subsidiary of AIM, an indirect wholly owned subsidiary
of AMVESCAP PLC. Charles T. Bauer, a Director and Chairman of the Fund and
Robert H. Graham, a Director and President of the Fund, own shares of AMVESCAP
PLC.

  The Plan may be terminated as to a particular class of the Portfolio by vote
of a majority of the Qualified Directors, or by vote of a majority of the
holders of the outstanding voting securities of such class. Any change in the
Plan that would increase materially the distribution expenses paid by an
applicable class requires shareholder approval; otherwise, the Plan may be
amended by the directors, including a majority of the Qualified Directors, by
vote cast in person at a meeting called for the purpose of voting upon such
amendment. As long as the Plan is in effect, the selection or nomination of
the Qualified Directors is committed to the discretion of the Qualified
Directors.

  The Plan complies with the Conduct Rules of the National Association of
Securities Dealers, Inc. and provides for payment of a service fee to dealers
and other financial institutions that provide continuing personal shareholder
services to their customers who purchase and own shares of each applicable
class of the Portfolio, in amounts of up to 0.25% of the average net assets of
such class of the Portfolio attributable to the customers of such dealers or
financial institutions. Payments to dealers and other financial institutions
in excess of such amount and payments to FMC would be characterized as an
asset-based sales charge pursuant to the amended Plan. The Plan also imposes a
cap on the total amount of sales charges, including asset-based sales charges,
that may be paid by the Portfolio with respect to each applicable class.

BANKING REGULATIONS

  The Glass-Steagall Act and other applicable laws or regulations among other
things, generally prohibit federally chartered or supervised banks from
engaging in the business of underwriting, selling or distributing securities,
but permit banks to make shares of mutual funds available to their customers
and to perform administrative and shareholder servicing functions. However,
judicial or administrative decisions or interpretations of such laws, as well
as changes in either federal or state statutes or regulations relating to the
permissible activities of banks or their subsidiaries or affiliates, could
prevent a bank from continuing to perform all or a part of its servicing
activities. If a bank were prohibited from so acting, shareholder clients of
such bank would be permitted to remain shareholders of the Fund and alternate
means for continuing the servicing of such shareholders would be sought. In
such event, changes in the operation of the Fund might occur and shareholders
serviced by such bank might no longer be able to avail themselves of any
automatic investment or other services then being provided by such bank. It is
not expected that shareholders would suffer any adverse financial consequences
as a result of any of these occurrences. In addition, state securities laws on
this issue may differ from the interpretations of federal law expressed herein
and certain banks and financial institutions may be required to register as
dealers pursuant to state law.

PERFORMANCE INFORMATION

  As stated under the caption "Performance Information--Performance Table" in
each Prospectus, yield information for the shares of each class of the
Portfolio may be obtained by calling the Fund at the telephone number set
forth in the prospectus for that class. Performance will vary from time to
time and past results are not necessarily indicative of future results.
Investors should understand that performance is a function of the type and
quality of the Portfolio's investments as well as its operating expenses.
Performance information for the shares of the Portfolio may not provide a
basis for comparison with investments which pay fixed rates of interest for a
stated period of time, with other investments or with investment companies
which use a different method of calculating performance.

                                     A-18
<PAGE>

  Calculations of yield will take into account the total income received by
the Portfolio. To the extent that different classes of shares bear different
expenses, the yields of such classes will vary. To the extent that
institutions charge fees in connection with services provided in conjunction
with the Fund, the yield will be lower for those beneficial owners paying such
fees.

  The current yields quoted will be the net average annualized yield for an
identified period, such as seven consecutive calendar days or a month. Yields
will be computed by assuming that an account was established with a single
share (the "Single Share Account") on the first day of the period. To arrive
at the quoted yield, the net change in the value of that Single Share Account
for the period (which would include dividends accrued with respect to the
share, and dividends declared on shares purchased with dividends accrued and
paid, if any, but would not include any realized gains and losses or
unrealized appreciation or depreciation and income other than investment
income) will be multiplied by 365 and then divided by the number of days in
the period, with the resulting figure carried to the nearest hundredth of one
percent. The Fund may also furnish a quotation of effective yields that
assumes the reinvestment of dividends for a 365 day year and a return for the
entire year equal to the average annualized yields for the period, which will
be computed by compounding the unannualized current yields for the period by
adding 1 to the unannualized current yields, raising the sum to a power equal
to 365 divided by the number of days in the period, and then subtracting 1
from the result.

  From time to time, AIM or its affiliates may waive all or a portion of their
fees and/or assume certain expenses of the Portfolio. Voluntary fee waivers or
reductions or commitments to assume expenses may be rescinded at any time
without further notice to investors. During periods of voluntary fee waivers
or reductions or commitments to assume expenses, AIM will retain its ability
to be reimbursed for such fee prior to the end of each fiscal year.
Contractual fee waivers or reductions or reimbursement of expenses set forth
in the Fee Table in a Prospectus may not be terminated or amended to the
Portfolio's detriment during the period stated in the agreement between AIM
and the Fund. Fee waivers or reductions or commitments to reduce expenses will
have the effect of increasing the Portfolio's yield and total return.

  For the seven-day period ended August 31, 1999, the current and effective
yields for the Private Investment Class were 4.98% and 5.10%, respectively.
For the seven-day period ended August 31, 1999, the current and effective
yields for the Institutional Class were 5.28% and 5.42%, respectively. For the
seven-day period ended August 31, 1999, the current and effective yields for
the Cash Management Class were 5.20% and 5.33%, respectively. For the seven-
day period ended August 31, 1999, the current and effective yields for the
Personal Investment Class were 4.78% and 4.89%, respectively. For the seven-
day period ended August 31, 1999, the current and effective yields for the
Reserve Class were 4.48% and 4.58%, respectively. For the seven-day period
ended August 31, 1999, the current and effective yields for the Resource Class
were 5.08% and 5.21%, respectively. These yields are quoted for illustration
purposes only. The yields for any other seven-day period may be substantially
different from the yields quoted above.

  The Portfolio may compare the performance of a particular class or the
performance of securities in which it may invest to:

    . IBC/Donoghue's Money Fund Averages, which are average yields of various
  types of money market funds that include the effect of compounding
  distributions;

    . other mutual funds, especially those with similar investment objectives.
  These comparisons may be based on data published by IBC/Donoghue's Money
  Fund Report--Registered Trademark--of Holliston, Massachusetts or by Lipper,
  Inc., a widely recognized independent service located in Summit, New Jersey,
  which monitors the performance of mutual funds;

    . yields on other money market securities or averages of other money
  market securities as reported by the Federal Reserve Bulletin, by TeleRate,
  a financial information network, or by Bloomberg, a financial information
  firm; and

    . other fixed-income investments such as Certificates of Deposit ("CDs").

  The principal value and interest rate of CDs and money market securities are
fixed at the time of purchase whereas the yield of a class will fluctuate.
Unlike some CDs and certain other money market securities, money market mutual
funds are not insured by the FDIC. Investors should give consideration to the
quality and maturity of the portfolio securities of the respective investment
companies when comparing investment alternatives.

  The Portfolio may reference the growth and variety of money market mutual
funds and AIM's innovation and participation in the industry.

REDEMPTIONS IN KIND

  The Fund will not redeem shares representing an interest in the Portfolio in
kind (i.e., by distributing its portfolio securities).

                                     A-19
<PAGE>

                      INVESTMENT PROGRAM AND RESTRICTIONS

INVESTMENT PROGRAM

  Information concerning the Portfolio's investment objective and operating
policies is set forth in each Prospectus. The principal features of the
Portfolio's investment program and the primary risks associated with that
investment program are also discussed in each Prospectus. There can be no
assurance that the Portfolio will achieve its objective. The values of the
securities in which the Portfolio invests fluctuate based upon interest rates,
the financial stability of the issuer and market factors. The following is a
more detailed description of the portfolio instruments eligible for purchase
by the Portfolio, which augments the summary of the Portfolio's investment
program which appears under the heading "Investment Objective and Strategies"
in each Prospectus.

  The Portfolio may invest in a broad range of U.S. Government and foreign
government obligations, taxable municipal securities, and bank and commercial
instruments that may be available in the money markets. Such obligations
include U.S. Treasury obligations and repurchase agreements. The Portfolio may
invest in bankers' acceptances, certificates of deposit, time deposits and
commercial paper, and U.S. Government direct obligations and U.S. Government
agencies securities. Certain U.S. Government obligations with floating or
variable interest rates may have longer maturities. Commercial obligations may
include both domestic and foreign issuers that are U.S. dollar-denominated.
Bankers' acceptances, certificates of deposit and time deposits may be
purchased from U.S. or foreign banks. These instruments, which are
collectively referred to as "Money Market Obligations," are briefly described
below.

  The Portfolio will limit investments in Money Market Obligations to those
which are denominated in U.S. dollars and which at the date of purchase are
"First Tier" securities as defined in Rule 2a-7 under the 1940 Act, as such
Rule may be amended from time to time. Briefly, "First Tier" securities are
securities that are rated in the highest rating category for short-term debt
obligations by two nationally recognized statistical rating organizations
("NRSROs") or, if only rated by one NRSRO, are rated in the highest rating
category by that NRSRO, or, if unrated are determined by the Portfolio's
investment advisor (under the supervision of and pursuant to guidelines
established by the Board of Directors) to be of comparable quality to a rated
security that meets the foregoing quality standards, as well as securities
issued by a registered investment company that is a money market fund and U.S.
government securities.

  The Portfolio will not invest more than 10% of its net assets in illiquid
securities.

  The Portfolio may invest in other investment companies to the extent
permitted by the 1940 Act, and rules and regulations thereunder, and, if
applicable, exemptive orders granted by the SEC.

  In managing the Portfolio's investments, AIM may indicate to dealers or
issuers its interest in acquiring certain securities for the Portfolio for
settlement beyond a customary settlement date thereafter. In some cases, the
Portfolio may agree to purchase such securities at stated prices and yields.
(In such cases, these securities are considered "delayed delivery" securities
when traded in the secondary market or "when-issued" securities if they are an
initial issuance of securities.) Since this is done to facilitate the
acquisition of portfolio securities and is not for the purpose of investment
leverage, the amount of delayed delivery or when-issued securities involved
may not exceed the estimated amount of funds available for investment on the
settlement date. Until the settlement date, liquid assets of the Portfolio
with a dollar value sufficient at all times to make payment for the delayed
delivery or when-issued securities will be set aside in a segregated account.
(The total amount of liquid assets in the segregrated account may not exceed
25% of the Portfolio's total assets.) The delayed delivery securities, which
will not begin to accrue interest until the settlement date, and the when-
issued securities will be recorded as an asset of the Portfolio and will be
subject to the risks of market value fluctuations. The purchase price of the
delayed delivery or when-issued securities will be recorded as a liability of
the Portfolio until settlement. AIM may also transact sales of securities on a
"forward commitment" basis. In such a transaction, AIM agrees to sell
portfolio securities at a future date at specified prices and yields.
Securities subject to sale on a forward commitment basis will continue to
accrue interest until sold and will be subject to the risks of market value
fluctuations. Absent extraordinary circumstances, the Portfolio's right to
acquire delayed delivery and when-issued securities or its obligation to sell
securities on a forward-commitment basis will not be divested prior to the
settlement date.

  The Portfolio may invest up to 100% of its total assets in obligations
issued by banks. While the Portfolio will limit its investments in bank
instruments to U.S. dollar-denominated obligations, it may invest in
Eurodollar obligations (i.e., U.S. dollar-denominated obligations issued by a
foreign branch of a domestic bank), Yankee dollar obligations (i.e., U.S.
dollar-denominated obligations issued by a domestic branch of a foreign bank)
and obligations of foreign branches of foreign banks, including time deposits.
The Portfolio will limit its aggregate investments in foreign bank
obligations, including Eurodollar obligations and Yankee dollar obligations,
to 25% of its total assets at the time of purchase, provided that there is no
limitation upon the Portfolio's investments in (a) Eurodollar obligations, if
the domestic parent of the foreign branch issued the obligation is
unconditionally liable in the event that the foreign branch for any reason
fails to pay on the Eurodollar obligation; and (b) Yankee dollar obligations,
if the U.S. branch of the foreign bank is subject to the same regulation as
U.S. banks.

  The Portfolio may invest in certificates of deposit ("Eurodollar CDs") and
time deposits ("Eurodollar time deposits") of foreign branches of domestic
banks having total assets of $5 billion as of the date of their most recently
published financial statements. Accordingly, an investment in the

                                     A-20
<PAGE>

Portfolio may involve risks that are different in some respects from those
incurred by an investment company which invests only in debt obligations of
U.S. domestic issuers. Such risks include future political and economic
developments, the possible seizure or nationalization of foreign deposits, the
possible imposition of foreign country withholding taxes on interest income
payable on Eurodollar CDs or Eurodollar time deposits, and the possible
establishment of exchange controls or the adoption of other foreign
governmental restrictions which might adversely affect the payment of
principal and interest on Eurodollar CDs and Eurodollar time deposits.

  The Portfolio may also lend its portfolio securities in amounts up to 33
1/3% of its total assets to financial institutions in accordance with the
investment restrictions of the Portfolio. Such loans would involve risks of
delay in receiving additional collateral in the event the value of the
collateral decreased below the value of the securities loaned or of delay in
recovering the securities loaned or even loss of rights in the collateral
should the borrower of the securities fail financially. However, loans will be
made only to borrowers deemed by AIM to be of good standing and only when, in
AIM's judgment, the income to be earned from the loans justifies the attendant
risks.

DESCRIPTION OF MONEY MARKET OBLIGATIONS

  The following list does not purport to be an exhaustive list of all Money
Market Obligations, and the Portfolio reserves the right to invest in Money
Market Obligations other than those listed below:

  U.S. GOVERNMENT DIRECT OBLIGATIONS--These are bills, notes, and bonds issued
by the U.S. Treasury.

  U.S. GOVERNMENT AGENCIES SECURITIES--Certain federal agencies (such as the
Federal National Mortgage Association, the Small Business Administration and
the Resolution Trust Corporation) have been established as instrumentalities
of the U.S. Government to supervise and finance certain types of activities.
Issues of these agencies, while not direct obligations of the U.S. Government,
are (a) backed by the full faith and credit of the United States, (b)
guaranteed by the U.S. Treasury or (c) supported by the issuing agencies'
right to borrow from the U.S. Treasury.

  FOREIGN GOVERNMENT OBLIGATIONS--These are U.S. dollar-denominated
obligations issued or guaranteed by one or more foreign governments or any of
their political subdivisions, agencies or instrumentalities that are
determined by AIM to be of comparable quality to the other obligations in
which the Portfolio may invest. These obligations are often, but not always,
supported by the full faith and credit of the foreign governments, or their
subdivisions, agencies or instrumentalities, that issue them. Such securities
also include debt obligations of supranational entities. Such debt obligations
are ordinarily backed by the full faith and credit of the entities that issue
them. Supranational entities include international organizations designated or
supported by governmental entities to promote economic reconstruction or
development and international banking institutions and related government
agencies. Examples of supranational entities include the International Bank
for Reconstruction and Development (the World Bank), the European Coal and
Steel Community, the Asian Development Bank and the InterAmerican Development
Bank. The percentage of the Portfolio's assets invested in securities issued
by foreign governments will vary depending on the relative yields of such
securities, the economic and financial markets of the countries in which the
investments are made and the interest rate climate of such countries.

  BANKERS' ACCEPTANCES--A bankers' acceptance is a bill of exchange or time
draft drawn on and accepted by a commercial bank. Bankers' acceptances are
used by corporations to finance the shipment and storage of goods and to
furnish dollar exchange. These instruments generally mature in six months or
less.

  CERTIFICATES OF DEPOSIT--A certificate of deposit is a negotiable interest-
bearing instrument with a specific maturity. Certificates of deposit are
issued by banks and savings and loan institutions in exchange for the deposit
of funds, and normally can be traded in the secondary market prior to
maturity.

  TIME DEPOSITS--A time deposit is a non-negotiable receipt issued by a bank
in exchange for the deposit of funds. Like a certificate of deposit, it earns
a specified rate of interest over a definite period of time; however, it
cannot be traded in the secondary market.

  EURODOLLAR OBLIGATIONS--A Eurodollar obligation is a U.S. dollar-denominated
obligation issued by a foreign branch of a domestic bank.

  YANKEE DOLLAR OBLIGATIONS--A Yankee dollar obligation is a U.S. dollar-
denominated obligation issued by a domestic branch of a foreign bank.

  SHORT AND MEDIUM TERM NOTES--Short and medium term notes are obligations
that have fixed coupons and maturities that can be targeted to meet investor
requirements. They are issued in the capital markets either publicly under a
shelf registration pursuant to Rule 415 promulgated by the SEC, or privately
without such a registration.

  MASTER NOTES--Master notes are demand notes that permit investment of
fluctuating amounts of money at varying rates of interest pursuant to
arrangements with issuers who meet the quality criteria of the Portfolio. The
interest rate on a master note may (a) fluctuate based upon changes in

                                     A-21
<PAGE>

specified interest rates, (b) be reset periodically according to a prescribed
formula or (c) be a set rate. Although there is no secondary market in master
notes, if such notes have a demand feature, the payee may demand payment of
the principal amount of the note on relatively short notice.

  REPURCHASE AGREEMENTS--A repurchase agreement is an instrument under which
the Portfolio acquires ownership of a debt security and the seller agrees, at
the time of the sale, to repurchase the obligation at a mutually agreed-upon
time and price, thereby determining the yield during the Portfolio's holding
period. Repurchase transactions are limited to a term not to exceed 365 days.
The Portfolio may enter into repurchase agreements only with institutions
believed by the Fund's Board of Directors to present minimal credit risk. With
regard to repurchase transactions, in the event of a bankruptcy or other
default of a seller of a repurchase agreement (such as the seller's failure to
repurchase the obligation in accordance with the terms of the agreement), the
Portfolio could experience both delays in liquidating the underlying
securities and losses, including (a) a possible decline in the value of the
underlying security during the period while the Portfolio seeks to enforce its
rights thereto, (b) possible subnormal levels of income and lack of access to
income during this period, and (c) expenses of enforcing its rights.
Repurchase agreements are considered to be loans by the Portfolio under the
1940 Act. Repurchase agreements will be secured by securities eligible under
Rule 2a-7 of the 1940 Act.

  BORROWING MONEY/REVERSE REPURCHASE AGREEMENTS--Reverse repurchase agreements
involve the sale by the Portfolio of a portfolio security at an agreed-upon
price, date and interest payment. The Portfolio will borrow money or enter
into reverse repurchase agreements solely for temporary or defensive purposes
to facilitate the orderly sale of portfolio securities to accommodate
abnormally heavy redemption requests should they occur. Reverse repurchase
transactions are limited to a term not to exceed 92 days. The Portfolio will
use reverse repurchase agreements when the interest income to be earned from
the securities that would otherwise have to be liquidated to meet redemption
requests is greater than the interest expense of the reverse repurchase
transaction. The Portfolio may enter into reverse repurchase agreements in
amounts not exceeding 10% of the value of its total assets. Reverse repurchase
agreements involve the risk that the market value of securities retained by
the Portfolio in lieu of liquidation may decline below the repurchase price of
the securities sold by the Portfolio which it is obligated to repurchase. The
risk, if encountered, could cause a reduction in the net asset value of the
Portfolio's shares. Reverse repurchase agreements are considered to be
borrowings under the 1940 Act.

ELIGIBLE SECURITIES

  The Fund will invest in "Eligible Securities" as defined in Rule 2a-7 under
the 1940 Act, which the Fund's Board of Directors has determined to present
minimal credit risk.

COMMERCIAL PAPER RATINGS

  Commercial paper is a term used to designate unsecured short-term promissory
notes issued by corporations and other entities. Maturities on these issues
vary from a few days to nine months. The following is a description of the
factors underlying the commercial paper ratings of Moody's Investors Service
("Moody's"), Standard & Poor's Rating Services ("S&P") and Fitch IBCA, Inc.
("Fitch").

  MOODY'S--The rating Prime-1 (P-1) is the highest commercial paper rating
assigned by Moody's. Among the factors considered by Moody's in assigning
ratings are the following: (1) evaluation of the management of the issuer; (2)
economic evaluation of the issuer's industry or industries and an appraisal of
speculative-type risks which may be inherent in certain areas; (3) evaluation
of the issuer's products in relation to competition and customer acceptance;
(4) liquidity; (5) amount and quality of long-term debt; (6) trend of earnings
over a period of ten years; (7) financial strength of a parent company and the
relationship which exists with the issuer; and (8) recognition by the
management of obligations which may be present or may arise as a result of
public interest questions and preparations to meet such obligations. These
factors are all considered in determining whether the commercial paper is
rated P-1, P-2 or P-3.

  S&P--Commercial paper rated A-1 by S&P has the following characteristics.
Liquidity ratios are adequate to meet cash requirements. Long-term senior debt
is rated "A" or better, although in some cases "BBB" credits may be allowed.
The issuer has access to at least two additional channels of borrowing. Basic
earnings and cash flow have an upward trend with allowance made for unusual
circumstances. Typically, the issuer's industry is well established and the
issuer has a strong position within the industry. The reliability and quality
of management is unquestioned. The relative strength or weakness of the above
factors determine whether the issuer's commercial paper is rated A-1, A-2 or
A-3.

  FITCH--Fitch's short-term rating has a time horizon of less than 12 months
for most obligations, or up to three years for U.S. public finance securities,
and thus places greater emphasis on the liquidity necessary to meet financial
commitments in a timely manner. Fitch short-term ratings are as follows:

                                      F-1

  Highest credit quality. Indicates the strongest capacity for timely payment
of financial commitments; may have an added "+" to denote any exceptionally
strong credit feature.

                                     A-22
<PAGE>

                                      F-2

  Good credit quality. A satisfactory capacity for timely payment of financial
commitments, but the margin of safety is not as great as in the case of the
highest ratings.

                             PLUS(+) AND MINUS (-)

  Plus and minus signs may be appended to a rating to denote relative status
within major rating categories. Such suffixes are not added to the "AAA" long-
term rating category, to categories below "CCC", or to short-term ratings
other than "F-1"

                                      LOC

  The symbol LOC indicates that the rating is based on a letter of credit
issued by a commercial bank.

BOND RATINGS

  The following is a description of the factors underlying the bond ratings of
Moody's, S&P and Fitch.

  MOODY'S--The following are the two highest bond ratings of Moody's.

                                      AAA

  Bonds which are rated Aaa are judged to be of the best quality. They carry
the smallest degree of investment risk and are generally referred to as "gilt
edge." Interest payments are protected by a large or exceptionally stable
margin and principal is secure. While the various protective elements are
likely to change, such changes as can be visualized are most unlikely to
impair the fundamentally strong position of such issues.

                                      AA

  Bonds which are rated Aa are judged to be of high quality by all standards.
Together with the Aaa group they comprise what are generally known as high
grade bonds. They are rated lower than the best bonds because margins of
protection may not be as large as Aaa securities or fluctuation of protective
elements may be of greater amplitude or there may be other elements present
which make the long term risks appear somewhat larger than in Aaa securities.

  S&P--The following are the four highest bond ratings of S&P; the lower two
of which are referred to in the foregoing description of its commercial paper
ratings.

                                      AAA

  Bonds rated AAA are the highest grade obligations. They possess the ultimate
degree of protection as to principal and interest. Market values of bonds
rated AAA move with interest rates, and hence provide the maximum safety on
all counts.

                                      AA

  Bonds rated AA also qualify as high grade obligations, and in the majority
of instances differ from AAA issues only in small degree. Here, too, prices
move with the long-term money market.

                                       A

  Bonds rated A are regarded as upper medium grade. They have considerable
investment strength but are not entirely free from adverse effects of changes
in economic and trade conditions. Interest and principal are regarded as safe.
They predominantly reflect money rates in their market behavior, but to some
extent, also economic conditions.

                                     A-23
<PAGE>

                                      BBB

  The BBB, or medium grade category, is borderline between definitely sound
obligations and those where the speculative element begins to predominate.
These bonds have adequate asset coverage and normally are protected by
satisfactory earnings. Their susceptibility to changing conditions,
particularly to depressions, necessitates constant watching. Market values of
these bonds are more responsive to business and trade conditions than to
interest rates. This group is the lowest which qualifies for commercial bank
investment.

  Fitch--Fitch investment grade bond ratings provide a guide to investors in
determining the credit risk associated with a particular security. The ratings
represent Fitch's assessment of the issuer's ability to meet the obligations
of a specific debt issue or class of debt in a timely manner.

  The rating takes into consideration special features of the issue, its
relationship to other obligations of the issuer, the current and prospective
financial condition and operating performance of the issuer and any guarantor,
as well as the economic and political environment that might affect the
issuer's future financial strength and credit quality.

  Fitch ratings do not reflect any credit enhancement that may be provided by
insurance policies or financial guaranties unless otherwise indicated.

  Bonds that have the same rating are of similar but not necessarily identical
credit quality since the rating categories do not fully reflect small
differences in the degrees of credit risk.

  Fitch ratings are not recommendations to buy, sell or hold any security.
Ratings do not comment on the adequacy of market price, the suitability of any
security for a particular investor, or the tax-exempt nature or taxability of
payments made in respect of any security.

  Fitch ratings are based on information obtained from issuers, other
obligors, underwriters, their experts, and other sources Fitch believes to be
reliable. Fitch does not audit or verify the truth or accuracy of such
information. Ratings may be changed, suspended, or withdrawn as a result of
changes in, or the unavailability of, information or for other reasons.

                                      AAA

  Highest credit quality. "AAA" ratings denote the lowest expectation of
credit risk. They are assigned only in case of exceptionally strong capacity
for timely payment of financial commitments. This capacity is highly unlikely
to be adversely affected by foreseeable events.

                                      AA

  Very high credit quality. "AA" ratings denote a very low expectation of
credit risk. They indicate very strong capacity for timely payment of
financial commitments. This capacity is not significantly vulnerable to
foreseeable events.

INVESTMENT RESTRICTIONS

  As a matter of fundamental policy which may not be changed without the
approval of a majority of the outstanding shares of the Portfolio (as that
term is defined under "General Information about the Fund--The Fund and its
Shares"), the Portfolio may not:

    (1) concentrate 25% or more of the value of its total assets in the
  securities of one or more issuers conducting their principal business
  activities in the same industry, provided that there is no limitation with
  respect to investments in obligations issued or guaranteed by the U.S.
  Government, its agencies or instrumentalities and bank instruments, such as
  CDs, bankers' acceptances, time deposits and bank repurchase agreements;

    (2) purchase securities of any one issuer (other than obligations of the
  U.S. Government, its agencies or instrumentalities) if, immediately after
  such purchase, more than 5% of the value of the Portfolio's total assets
  would be invested in such issuer, except as permitted by Rule 2a-7 under the
  1940 Act, as amended from time to time, and except that the Portfolio may
  purchase securities of other investment companies to the extent permitted by
  applicable law or exemptive order;

    (3) borrow money or issue senior securities except (a) for temporary or
  emergency purposes (e.g., in order to facilitate the orderly sale of
  portfolio securities or to accommodate abnormally heavy redemption
  requests), the Portfolio may borrow money from banks or obtain funds by
  entering into reverse repurchase agreements, and (b) to the extent that
  entering into commitments to purchase securities in accordance with the
  Portfolio's investment program may be considered the issuance of senior
  securities, provided that the Portfolio will not purchase portfolio
  securities while borrowings in excess of 5% of its total assets are
  outstanding;

                                     A-24
<PAGE>

    (4) mortgage, pledge or hypothecate any assets except to secure permitted
  borrowings and except for reverse repurchase agreements and then only in an
  amount up to 33 1/3% of the value of its total assets at the time of
  borrowing or entering into a reverse repurchase agreement;

    (5) make loans of money or securities other than (a) through the purchase
  of debt securities in accordance with the Portfolio's investment program,
  (b) by entering into repurchase agreements and (c) by lending portfolio
  securities to the extent permitted by law or regulation;

    (6) underwrite securities issued by any other person, except to the extent
  that the purchase of securities and the later disposition of such securities
  in accordance with the Portfolio's investment program may be deemed an
  underwriting;

    (7) invest in real estate, except that the Portfolio may purchase and sell
  securities secured by real estate or interests therein or issued by issuers
  which invest in real estate or interests therein;

    (8) purchase or sell commodities or commodity futures contracts, purchase
  securities on margin, make short sales or invest in puts or calls; or

    (9) invest in any obligation not payable as to principal and interest in
  United States currency.

  The following investment policy is not fundamental and may be changed by the
Board of Directors of the Fund without shareholder approval. The Portfolio
does not intend to invest in companies for the purpose of exercising control
or management, except that the Portfolio may purchase securities of other
investment companies to the extent permitted by the 1940 Act, and rules and
regulations thereunder, and if applicable, exemptive orders granted by the
SEC. The Fund has obtained an exemptive order from the SEC allowing it to
invest in money market funds that have AIM or an affiliate of AIM as an
investment adviser (the "Affiliated Money Market Fund"), provided that
investments in Affiliated Money Market Funds do not exceed 25% of the total
assets of the Portfolio. If other funds advised by AIM invest in the
Portfolio, however, the Portfolio will be subject to the provisions of Section
12(d)(1) of the 1940 Act, which limits the ability of an investment company to
invest in another investment company. With respect to the Portfolio's purchase
of shares of the Affiliated Money Market Funds, the Portfolio will indirectly
pay the advisory fees and other operating expenses of the Affiliated Money
Market Funds.

                     PORTFOLIO TRANSACTIONS AND BROKERAGE

GENERAL BROKERAGE POLICY

  AIM makes decisions to buy and sell securities for the Portfolio, selects
broker-dealers, effects the Portfolio's investment portfolio transactions,
allocates brokerage fees in such transactions, and where applicable,
negotiates commissions and spreads on transactions. Since purchases and sales
of portfolio securities by the Portfolio are usually principal transactions,
the Portfolio incurs little or no brokerage commissions. AIM's primary
consideration in effecting a security transaction is to obtain the most
favorable execution of the order, which includes the best price on the
security and a low commission rate (as applicable). While AIM seeks reasonable
competitive commission rates, the Portfolio may not pay the lowest commission
or spread available. See "Section 28(e) Standards" below.

  In the event the Portfolio purchases securities traded in over-the-counter
markets, the Portfolio deals directly with dealers who make markets in the
securities involved, except when better prices are available elsewhere.
Portfolio transactions placed through dealers who are primary market makers
are effected at net prices without commissions, but which include compensation
in the form of a mark up or mark down.

  AIM may determine target levels of commission business with various brokers
on behalf of its clients (including the Portfolio) over a certain time period.
The target levels will be based upon the following factors, among others: (1)
the execution services provided by the broker; (2) the research services
provided by the broker; and (3) the broker's interest in mutual funds in
general and in the Portfolio and other mutual funds advised by AIM or
A I M Capital Management, Inc. (collectively, the "AIM Funds") in particular,
including sales of the Portfolio and of the other AIM Funds. In connection
with (3) above, the Portfolio's trades may be executed directly by dealers
which sell shares of the AIM Funds or by other broker-dealers with which such
dealers have clearing arrangements. AIM will not use a specific formula in
connection with any of these considerations to determine the target levels.

  AIM will seek, whenever possible, to recapture for the benefit of a
Portfolio any commissions, fees, brokerage or similar payments paid by the
Portfolio on portfolio transactions. Normally, the only fees which AIM can
recapture are the soliciting dealer fees on the tender of the Portfolio's
securities in a tender or exchange offer.

  The Portfolio may engage in certain principal and agency transactions with
banks and their affiliates that own 5% or more of the outstanding voting
securities of the Portfolio provided the conditions of an exemptive order
received by the Portfolio from the SEC are met. In addition, the Portfolio may
purchase or sell a security from or to another AIM Fund provided the Portfolio
follows procedures adopted by the Board of Directors/Trustees of the various
AIM Funds, including the Fund. These inter-fund transactions do not generate
brokerage commissions but may result in custodial fees or taxes or other
related expenses.

  The Portfolio does not seek to profit from short-term trading, and will
generally (but not always) hold portfolio securities to maturity, but AIM may
seek to enhance the yield of the Portfolio by taking advantage of yield
disparities or other factors that occur in the money markets. For example,
market

                                     A-25
<PAGE>

conditions frequently result in similar securities trading at different
prices. AIM may dispose of any portfolio security prior to its maturity if
such disposition and reinvestment of proceeds are expected to enhance yield
consistent with AIM's judgment as to desirable portfolio maturity structure or
if such disposition is believed to be advisable due to other circumstances or
conditions. The amortized cost method of valuing portfolio securities requires
that the Portfolio maintain an average weighted portfolio maturity of ninety
days or less. Thus, there is likely to be relatively high portfolio turnover,
but since brokerage commissions are not normally paid on money market
instruments, the high rate of portfolio turnover is not expected to have a
material effect on the net income or expenses of the Portfolio. The
Portfolio's policy of investing in securities with maturities of 397 days or
less will result in high portfolio turnover. Since brokerage commissions are
not normally paid on investments of the type made by the Portfolio, the high
turnover rate should not adversely affect the Portfolio's net income.

ALLOCATION OF PORTFOLIO TRANSACTIONS

  AIM and its affiliates manage several other investment accounts. Some of
these accounts may have investment objectives similar to the Portfolio.
Occasionally, identical securities will be appropriate for investment by the
Portfolio and by another fund or one or more of these investment accounts.
However, the position of each account in the same securities and the length of
time that each account may hold its investment in the same securities may
vary. The timing and amount of purchase by each account will also be
determined by its cash position. If the purchase or sale of securities is
consistent with the investment policies of the Portfolio and one or more of
these accounts, and is considered at or about the same time, AIM will fairly
allocate transactions in such securities among the Portfolio and these
accounts. AIM may combine such transactions, in accordance with applicable
laws and regulations, to obtain the most favorable execution. Simultaneous
transactions could, however, adversely affect the Portfolio's ability to
obtain or dispose of the full amount of a security which it seeks to purchase
or sell.

  Sometimes the procedure for allocating portfolio transactions among the
various investment accounts advised by AIM could have an adverse effect on the
price or amount of securities available to the Portfolio. In making such
allocations, AIM considers the investment objectives and policies of its
advisory clients, the relative size of portfolio holdings of the same or
comparable securities, the availability of cash for investment, the size of
investment commitments generally held, and the judgments of the persons
responsible for recommending the investment.

SECTION 28(e) STANDARDS

  Section 28(e) of the Securities Exchange Act of 1934 provides that AIM,
under certain circumstances, lawfully may cause an account to pay a higher
commission than the lowest available. Under Section 28(e), AIM must make a
good faith determination that the commissions paid are "reasonable in relation
to the value of the brokerage and research services provided . . . viewed in
terms of either that particular transaction of [AIM's] overall
responsibilities with respect to the accounts as to which it exercises
investment discretion." The services provided by the broker also must lawfully
and appropriately assist AIM in the performance of its investment decision-
making responsibilities. Accordingly, in recognition of research services
provided to it, the Portfolio may pay a broker higher commissions than those
available from another broker.

  Research services received from broker-dealers supplement AIM's own research
(and the research of its affiliates), and may include the following types of
information: statistical and background information on the U.S. and foreign
economies, industry groups and individual companies; forecasts and
interpretations with respect to the U.S. and foreign economies, securities,
markets, specific industry groups and individual companies; information on
federal, state, local and foreign political developments; portfolio management
strategies; performance information on securities, indexes and investment
accounts; information concerning prices of securities; and information
supplied by specialized services to AIM and to the Fund's directors with
respect to the performance, investment activities, and fees and expenses of
other mutual funds. Broker-dealers may communicate such information
electronically, orally, in written form or on computer software. Research
services may also include the providing of custody services, as well as the
providing of equipment used to communicate research information, the providing
of specialized consultations with AIM personnel with respect to computerized
systems and data furnished to AIM as a component of other research services,
the arranging of meetings with management of companies, and the providing of
access to consultants who supply research information.

  The outside research assistance is useful to AIM since the broker-dealers
used by AIM tend to follow a broader universe of securities and other matters
than AIM's staff can follow. In addition, the research provides AIM with a
diverse perspective on financial markets. Research services provided to AIM by
broker-dealers are available for the benefit of all accounts managed or
advised by AIM or by its affiliates. Some broker-dealers may indicate that the
provision of research services is dependent upon the generation of certain
specified levels of commissions and underwriting concessions by AIM's clients,
including the Portfolio. However, the Portfolio is not under any obligation to
deal with any broker-dealer in the execution of transactions in portfolio
securities.

  In some cases, the research services are available only from the broker-
dealer providing them. In other cases, the research services may be obtainable
from alternative sources in return for cash payments. AIM believes that the
research services are beneficial in supplementing AIM's research and analysis
and that they improve the quality of AIM's investment advice. The advisory fee
paid by the Portfolio is not reduced because AIM receives such services.
However, to the extent that AIM would have purchased research services had
they not been provided by broker-dealers, the expenses to AIM could be
considered to have been reduced accordingly.

                                     A-26
<PAGE>

  Under the 1940 Act, certain persons affiliated with the Fund are prohibited
from dealing with the Portfolios as principal in any purchase or sale of
securities unless an exemptive order allowing such transactions is obtained
from the SEC. Furthermore, the 1940 Act prohibits the Fund from purchasing a
security being publicly underwritten by a syndicate of which certain persons
affiliated with the Fund are members except in accordance with certain
conditions. These conditions may restrict the ability of the Portfolio to
purchase money market obligations being publicly underwritten by such a
syndicate, and the Portfolio may be required to wait until the syndicate has
been terminated before buying such securities. At such time, the market price
of the securities may be higher or lower than the original offering price. A
person affiliated with the Fund may, from time to time, serve as placement
agent or financial advisor to an issuer of money market obligations and be
paid a fee by such issuer. The Portfolio may purchase such money market
obligations directly from the issuer, provided that the purchase is made in
accordance with procedures adopted by the Fund's Board of Directors and any
such purchases are reviewed at least quarterly by the Fund's Board of
Directors and a determination is made that all such purchases were effected in
compliance with such procedures, including a determination that the placement
fee or other remuneration paid by the issuer to the person affiliated with the
Fund was fair and reasonable in relation to the fees charged by others
performing similar services. During the fiscal year ended August 31, 1998, no
securities or instruments were purchased by the Portfolio from issuers who
paid placement fees or other compensation to a broker affiliated with the
Portfolio.

                   DIVIDENDS, DISTRIBUTIONS AND TAX MATTERS

DIVIDENDS AND DISTRIBUTIONS

  Dividends with respect to each class of the Portfolio are declared to
shareholders of record immediately after 5:00 p.m. Eastern time on the date of
declaration. Accordingly, dividends accrue on the first day that a purchase
order for shares of a particular class is effective, provided that the
purchase order has been accepted prior to 5:00 p.m. Eastern time and payment
in the form of federal funds wired has been received by AFS. Dividends do not
accrue on the day that a redemption order is effective, unless the redemption
is effective after 5.00 p.m. Eastern time on that day and redemption proceeds
have not been wired to the shareholder on the same day. Thus, if a purchase
order is accepted prior to 5:00 p.m. Eastern time, the shareholder will
receive its pro rata share of dividends beginning with those declared on that
day.

  Dividends and distributions are paid in cash unless the shareholder has
elected to have such dividends and distributions reinvested in the form of
additional full and fractional shares at the net asset value hereof. Such
election, or any revocation thereof, must be made in writing and sent by the
shareholder to the AFS at P.O. Box 4497, Houston, Texas 77210-4497. Such
election or revocation will be effective with dividends paid after it is
received by the transfer agent.

  All dividends declared during a month will normally be paid by wire
transfer. Payment will normally be made on the first business day of the
following month. If a shareholder redeems all the shares in his account at any
time during the month, all dividends declared through the date of redemption
are paid to the shareholder along with the proceeds of the redemption.
Information concerning the amount of the dividends declared on any particular
day will normally be available by 6:00 p.m. Eastern time on that day.

  The dividend accrued and paid for each class of shares of the Portfolio will
consist of: (a) interest accrued and original issue discount earned less
amortization of premiums, if any, for the portfolio to which such class
relates, allocated based upon such class' pro rata share of the total shares
outstanding which relate to such portfolio, less (b) Fund expenses accrued for
the applicable dividend period attributable to such portfolio, such as
custodian fees and accounting expenses, allocated based upon each such class'
pro rata share of the net assets of such portfolio, less (c) expenses directly
attributable to each class which are accrued for the applicable dividend
period, such as distribution expenses, if any.

  Should the Fund incur or anticipate any unusual expense, loss or
depreciation, which would adversely affect the net asset value per share of
the Portfolio or the net income per share of a class of the Portfolio for a
particular period, the Board of Directors would at that time consider whether
to adhere to the present dividend policy described above or to revise it in
light of then prevailing circumstances. For example, if the net asset value
per share of the Portfolio were reduced, or were anticipated to be reduced,
below $1.00, the Board of Directors might suspend further dividend payments on
shares of the Portfolio until the net asset value returns to $1.00. Thus, such
expense or loss or depreciation might result in a shareholder receiving no
dividends for the period during which it held shares of the Portfolio and/or
in its receiving upon redemption a price per share lower than that which it
paid.

TAX MATTERS

  The following is only a summary of certain additional tax considerations
generally affecting the Portfolio and its shareholders that are not described
in each Prospectus. No attempt is made to present a detailed explanation of
the tax treatment of the Portfolio or its shareholders, and the discussion
here and in each Prospectus is not intended as a substitute for careful
planning.

QUALIFICATION AS A REGULATED INVESTMENT COMPANY

  The Portfolio has elected to be taxed as a regulated investment company
under Subchapter M of the Internal Revenue Code of 1986, as amended (the
"Code"). As a regulated investment company, the Portfolio is not subject to
federal income tax on the portion of its net investment income (i.e.,

                                     A-27
<PAGE>

taxable interest, dividends and other taxable ordinary income, net of
expenses) and capital gain net income (i.e., the excess of capital gains over
capital losses) that it distributes to shareholders, provided that it
distributes at least 90% of its investment company taxable income (i.e., net
investment income and the excess of net short-term capital gain over net long-
term capital loss) for the taxable year (the "Distribution Requirement"), and
satisfies certain other requirements of the Code that are described below.
Distributions by the Portfolio made during the taxable year or, under
specified circumstances, within twelve months after the close of the taxable
year, will be considered distributions of income and gains for the taxable
year and can therefore satisfy the Distribution Requirement.

  In addition to satisfying the Distribution Requirement, a regulated
investment company (1) must derive at least 90% of its gross income from
dividends, interest, certain payments with respect to securities loans, gains
from the sale or other disposition of stock or securities or foreign
currencies (to the extent such currency gains are directly related to the
regulated investment company's principal business of investing in stock or
securities) and other income (including but not limited to gains from options,
futures or forward contracts) derived with respect to its business of
investing in such stock, securities or currencies (the "Income Requirement");
and (2) must satisfy an asset diversification test in order to qualify for tax
purposes as a regulated investment company (the "Asset Diversification Test").
Under the Asset Diversification Test, at the close of each quarter of a fund's
taxable year, at least 50% of the value of a fund's assets must consist of
cash and cash items, U.S. Government securities, securities of other regulated
investment companies, and securities of other issuers (as to which a fund has
not invested more than 5% of the value of a fund's total assets in securities
of such issuer and as to which a fund does not hold more than 10% of the
outstanding voting securities of such issuer), and no more than 25% of the
value of its total assets may be invested in the securities of any other
issuer (other than U.S. Government securities and securities of other
regulated investment companies), or in two or more issuers which a fund
controls and which are engaged in the same or similar trades or businesses.

  If, for any taxable year the Portfolio does not qualify as a regulated
investment company, all of its taxable income (including its net capital gain)
will be subject to tax at regular corporate rates without any deduction for
distributions to shareholders, and such distributions will be taxable as
ordinary dividends to the extent of the Portfolio's current and accumulated
earnings and profits. Such distributions generally will be eligible for the
dividends received deduction in the case of corporate shareholders.

EXCISE TAX ON REGULATED INVESTMENT COMPANIES

  A 4% non-deductible excise tax is imposed on a regulated investment company
that fails to distribute in each calendar year an amount equal to 98% of
ordinary taxable income for the calendar year and 98% of capital gain net
income for the one-year period ended on October 31 of such calendar year (or,
at the election of a regulated investment company having a taxable year ending
November 30 or December 31, for its taxable year). The balance of such income
must be distributed during the next calendar year. For the foregoing purposes,
a regulated investment company is treated as having distributed any amount on
which it is subject to income tax for any taxable year ending in such calendar
year.

  The Portfolio intends to make sufficient distributions or deemed
distributions of its ordinary taxable income and capital gain net income prior
to the end of each calendar year to avoid liability for the excise tax.
However, investors should note that the Portfolio may in certain circumstances
be required to liquidate portfolio investments to make sufficient
distributions to avoid excise tax liability.

PORTFOLIO DISTRIBUTIONS

  The Portfolio anticipates distributing substantially all of its investment
company taxable income for each taxable year. Such distributions will be
taxable to shareholders as ordinary income and treated as dividends for
federal income tax purposes, but they will not qualify for the 70% dividends
received deduction for corporations.

  The Portfolio may either retain or distribute to shareholders its net
capital gain, if any, for each taxable year. The Portfolio currently intends
to distribute any such amounts. If net capital gain is distributed and
designated as a capital gain dividend, it will be taxable to shareholders as
long-term capital gain, regardless of the length of time the shareholder has
held his shares or whether such gain was recognized by the Portfolio prior to
the date on which the shareholder acquired his shares.

  Distributions by the Portfolio that do not constitute ordinary income
dividends or capital gain dividends will be treated as a return of capital to
the extent of (and in reduction of) the shareholder's tax basis in his shares;
any excess will be treated as gain from the sale of his shares.

  Distributions by the Portfolio will be treated in the manner described above
regardless of whether such distributions are paid in cash or reinvested in
additional shares of a class of the Portfolio. Shareholders receiving a
distribution in the form of additional shares will be treated as receiving a
distribution in an amount equal to the fair market value of the shares
received, determined as of the reinvestment date.

  Ordinarily, shareholders are required to take distributions by the Portfolio
into account in the year in which the distributions are made. However,
dividends declared in October, November or December of any year and payable to
shareholders of record on a specified date in such a month will be

                                     A-28
<PAGE>

deemed to have been received by the shareholders (and made by the Portfolio)
on December 31 of such calendar year if such dividends are actually paid in
January of the following year.

  The Portfolio will be required in certain cases to withhold and remit to the
U.S. Treasury 31% of the ordinary income dividends and capital gain dividends
and, in certain cases, the proceeds of redemption of shares, paid to any
shareholder (1) who has provided either an incorrect tax identification number
or no number at all, (2) who is subject to backup withholding by the Internal
Revenue Service for failure to report the receipt of interest or dividend
income properly, or (3) who has failed to certify to the Fund that it is not
subject to backup withholding or that it is a corporation or other "exempt
recipient."

SALE OR REDEMPTION OF SHARES

  A shareholder will recognize gain or loss on the sale or redemption of
shares of a class in an amount equal to the difference between the proceeds of
the sale or redemption and the shareholder's adjusted tax basis in the shares.
All or a portion of any loss so recognized may be disallowed if the
shareholder purchases other shares of the class within 30 days before or after
the sale or redemption. In general, any gain or loss arising from (or treated
as arising from) the sale or redemption of shares of a class will be
considered capital gain or loss and will be long-term capital gain or loss if
the shares were held for longer than one year. However, any capital loss
arising from the sale or redemption of shares held for six months or less will
be treated as a long-term capital loss to the extent of the amount of capital
dividends received on such shares. For this purpose, the special holding
period rules of Code Section 246(c)(3) and (4) generally will apply in
determining the holding period of shares.

FOREIGN SHAREHOLDERS

  Taxation of a shareholder who, as to the United States, is a nonresident
alien individual, foreign trust or estate, foreign corporation, or foreign
partnership ("foreign shareholder"), depends on whether the income from the
Portfolio is "effectively connected" with a U.S. trade or business carried on
by such shareholder.

  If the income from the Portfolio is not effectively connected with a U.S.
trade or business carried on by a foreign shareholder, dividends and
distributions (other than capital gains dividends) will be subject to U.S.
withholding tax at the rate of 30% (or lower treaty rate) upon the gross
amount of the dividend or distribution. Such a foreign shareholder would
generally be exempt from U.S. federal income tax on gains realized on the sale
of shares of a class, capital gain dividends and amounts retained by the
Portfolio that are designated as undistributed capital gains.

  If the income from the Portfolio is effectively connected with a U.S. trade
or business carried on by a foreign shareholder, then ordinary income
dividends, capital gain dividends and any gains realized upon the sale of
shares of the Portfolio will be subject to U.S. federal income tax at the
rated applicable to U.S. citizens or domestic corporations.

  In the case of foreign noncorporate shareholders, the Portfolio may be
required to withhold U.S. federal income tax at a rate of 31% on distributions
that are otherwise exempt from withholding tax unless such shareholders
furnish the Portfolio with proper notification of their foreign status.

  The tax consequences to a foreign shareholder entitled to claim the benefits
of an applicable tax treaty may be different from those described herein.
Foreign shareholders are urged to consult their own tax advisers with respect
to the particular tax consequences to them of an investment in the Portfolio,
including the applicability of foreign taxes.

  Foreign persons who file a United States tax return for a U.S. tax refund
and who are not eligible to obtain a social security number must apply to the
Internal Revenue Service (IRS) for an individual taxpayer identification
number, using IRS Form W-7. For a copy of the IRS Form W-7 and accompanying
instructions, please contact your tax advisor or transfer agent.

EFFECT OF FUTURE LEGISLATION; LOCAL TAX CONSIDERATIONS

  The foregoing general discussion of U.S. federal income tax consequences is
based on the Code and the regulations issued thereunder as in effect on
November 1, 1999. Future legislative or administrative changes or court
decisions may significantly change the conclusions expressed herein, and any
such changes or decisions may have a retroactive effect with respect to the
transactions contemplated herein.

  Rules of state and local taxation of ordinary income dividends and capital
gain dividends from regulated investment companies often differ from the rules
for U.S. federal income taxation described above. Shareholders are urged to
consult their tax advisors as to the consequences of these and other state and
local tax rules affecting an investment in the Portfolio.

                                     A-29
<PAGE>

                              FINANCIAL STATEMENTS

                                       FS
<PAGE>

SCHEDULE OF INVESTMENTS
August 31, 1999
<TABLE>
<CAPTION>
                                                  PAR
                                       MATURITY  (000)       VALUE
<S>                                    <C>      <C>      <C>
COMMERCIAL PAPER - 38.93%(a)

BASIC INDUSTRIES - 0.42%

CHEMICALS - 0.42%

Henkel Corp.
4.88%                                  09/07/99  $ 13,000  $ 12,989,427
- -----------------------------------------------------------------------
4.80%                                  09/22/99    13,000    12,963,600
- -----------------------------------------------------------------------
  Total Basic Industries                                     25,953,027
- -----------------------------------------------------------------------

CAPITAL GOODS - 1.00%

ELECTRICAL EQUIPMENT - 0.37%

Siemens Capital Corp.
4.78%                                  09/30/99    23,000    22,911,437
- -----------------------------------------------------------------------

MANUFACTURING - DIVERSIFIED - 0.63%

Cargill, Inc.
5.42%                                  01/21/00    40,000    39,144,844
- -----------------------------------------------------------------------
  Total Capital Goods                                        62,056,281
- -----------------------------------------------------------------------

CONSUMER SERVICES - 0.29%

ENTERTAINMENT (MISCELLANEOUS) - 0.29%

Walt Disney Co. (The) 4.87%            09/16/99    18,000    17,963,475
- -----------------------------------------------------------------------

ENERGY - 0.76%

OIL & GAS (INTEGRATED) - 0.76%

Shell Oil Co.
5.15%                                  09/13/99    46,750    46,750,000
- -----------------------------------------------------------------------

FINANCIAL - 36.46%

ASSET BACKED SECURITIES-COMMERCIAL LOANS/LEASES - 2.21%

Centric Capital Corp.
4.86%                                  09/27/99    23,000    22,919,270
- -----------------------------------------------------------------------
5.14%                                  09/27/99    30,000    29,888,633
- -----------------------------------------------------------------------
5.14%                                  09/28/99    30,000    29,884,350
- -----------------------------------------------------------------------
4.81%                                  10/12/99    37,000    36,797,312
- -----------------------------------------------------------------------
4.82%                                  10/20/99    17,333    17,219,286
- -----------------------------------------------------------------------
                                                            136,708,851
- -----------------------------------------------------------------------

ASSET BACKED SECURITIES-CONSUMER

RECEIVABLES - 0.40%

Old Line Funding Corp.
5.20%                                  09/15/99    24,946    24,895,554
- -----------------------------------------------------------------------
</TABLE>

                                     FS-1
<PAGE>

<TABLE>
<CAPTION>
                                                     PAR
                                         MATURITY   (000)       VALUE

<S>                                     <C>       <C>      <C>
ASSET BACKED SECURITIES-MULTI-PURPOSE - 19.98%

Bavaria TRR Corp.
4.97%                                    11/22/99  $ 27,000  $ 26,694,345
- -------------------------------------------------------------------------
5.45%                                    01/19/00    25,200    24,665,900
- -------------------------------------------------------------------------
5.50%                                    01/27/00    25,000    24,434,722
- -------------------------------------------------------------------------
5.75%                                    02/15/00    21,759    21,178,609
- -------------------------------------------------------------------------
5.54%                                    02/22/00    45,000    45,000,000
- -------------------------------------------------------------------------
Corporate Receivables Corp.
5.13%                                    09/14/99    25,000    24,953,688
- -------------------------------------------------------------------------
5.12%                                    09/15/99    50,000    49,900,444
- -------------------------------------------------------------------------
5.37%                                    02/16/00    41,000    40,998,148
- -------------------------------------------------------------------------
5.77%                                    02/28/00    35,000    33,990,250
- -------------------------------------------------------------------------
Edison Asset Securitization, L.L.C.
5.16%                                    09/03/99    30,000    29,991,400
- -------------------------------------------------------------------------
4.84%                                    09/10/99    30,000    29,963,700
- -------------------------------------------------------------------------
4.85%                                    09/13/99    25,000    24,959,583
- -------------------------------------------------------------------------
5.13%                                    09/13/99    17,185    17,155,613
- -------------------------------------------------------------------------
4.84%                                    09/29/99    38,010    37,866,913
- -------------------------------------------------------------------------
4.82%                                    09/30/99    25,000    24,902,931
- -------------------------------------------------------------------------
4.82%                                    10/15/99    30,000    29,823,267
- -------------------------------------------------------------------------
5.43%                                    01/14/00    25,000    24,490,938
- -------------------------------------------------------------------------
5.48%                                    01/25/00    33,400    32,657,704
- -------------------------------------------------------------------------
Falcon Asset Securitization Corp.
5.14%                                    09/14/99    29,295    29,240,625
- -------------------------------------------------------------------------
4.81%                                    09/20/99    50,000    49,873,069
- -------------------------------------------------------------------------
Monte Rosa Capital Corp.
5.18%                                    09/08/99    49,000    48,950,646
- -------------------------------------------------------------------------
Park Avenue Receivables Corp.
5.13%                                    09/13/99    31,593    31,538,976
- -------------------------------------------------------------------------
5.20%                                    09/17/99    40,000    39,907,556
- -------------------------------------------------------------------------
5.15%                                    09/24/99    30,000    29,901,292
- -------------------------------------------------------------------------
Preferred Receivables Funding Corp.
5.20%                                    09/27/99    50,000    49,812,222
- -------------------------------------------------------------------------
Quincy Capital Corp.
5.13%                                    09/07/99    33,000    32,971,785
- -------------------------------------------------------------------------
Receivables Capital Corp.
5.13%                                    09/10/99    25,606    25,573,160
- -------------------------------------------------------------------------
Sheffield Receivables Corp.
5.17%                                    09/03/99    35,350    35,339,846
- -------------------------------------------------------------------------
5.18%                                    09/07/99    50,000    49,956,833
- -------------------------------------------------------------------------
5.15%                                    09/10/99    41,500    41,446,569
- -------------------------------------------------------------------------
5.30%                                    09/20/99   100,000    99,720,278
- -------------------------------------------------------------------------
5.30%                                    09/21/99   100,000    99,705,556
- -------------------------------------------------------------------------
5.22%                                    09/28/99    30,000    29,882,550
- -------------------------------------------------------------------------
                                                            1,237,449,118
- -------------------------------------------------------------------------
</TABLE>

                                     FS-2
<PAGE>

<TABLE>
<CAPTION>
                                                        PAR
                                             MATURITY  (000)       VALUE
<S>                                          <C>      <C>      <C>
ASSET BACKED SECURITIES-TRADE RECEIVABLES - 1.91%

Asset Securitization Cooperative Corp.
5.17%                                        09/30/99  $ 35,000  $ 34,854,235
- -----------------------------------------------------------------------------
5.39%                                        03/27/00    25,000    24,998,556
- -----------------------------------------------------------------------------
Variable Funding Capital
5.76%                                        01/10/00    30,000    29,371,200
- -----------------------------------------------------------------------------
5.68%                                        01/21/00    30,000    29,327,867
- -----------------------------------------------------------------------------
                                                                  118,551,858
- -----------------------------------------------------------------------------

BANKS (DOMESTIC) - 2.58%

Bank of America
4.87%                                        09/08/99    25,000    24,976,326
- -----------------------------------------------------------------------------
4.81%                                        09/09/99    25,000    24,973,278
- -----------------------------------------------------------------------------
Banc One Financial Corp.
4.85%                                        09/13/99    15,000    14,975,750
- -----------------------------------------------------------------------------
4.85%                                        09/20/99    20,000    19,948,806
- -----------------------------------------------------------------------------
5.12%                                        09/24/99    25,000    24,918,222
- -----------------------------------------------------------------------------
4.80%                                        09/28/99    50,000    49,820,000
- -----------------------------------------------------------------------------
                                                                  159,612,382
- -----------------------------------------------------------------------------

BROKER DEALER - 1.83%

Credit Suisse First Boston Inc.
5.68%                                        02/14/00    30,000    29,214,267
- -----------------------------------------------------------------------------
5.74%                                        02/18/00    35,000    34,051,306
- -----------------------------------------------------------------------------
Morgan Stanley, Dean Witter, Discover & Co.
5.62%                                        02/07/00    50,000    50,000,000
- -----------------------------------------------------------------------------
                                                                  113,265,573
- -----------------------------------------------------------------------------

FINANCIAL - MULTIPLE INDUSTRY - 6.69%

Associates First Capital Corp.
4.81%                                        09/10/99    30,000    29,963,925
- -----------------------------------------------------------------------------
4.80%                                        11/03/99    30,000    29,748,000
- -----------------------------------------------------------------------------
5.60%                                        02/09/00    25,000    24,373,889
- -----------------------------------------------------------------------------
5.74%                                        02/14/00    35,000    34,073,628
- -----------------------------------------------------------------------------
General Electric Capital Corp.
4.81%                                        09/02/99    50,000    49,993,319
- -----------------------------------------------------------------------------
4.82%                                        09/08/99    25,000    24,976,569
- -----------------------------------------------------------------------------
4.81%                                        09/08/99    25,000    24,976,618
- -----------------------------------------------------------------------------
4.81%                                        09/09/99    25,000    24,973,278
- -----------------------------------------------------------------------------
4.84%                                        09/29/99    25,000    24,905,889
- -----------------------------------------------------------------------------
4.81%                                        11/03/99    25,000    24,789,563
- -----------------------------------------------------------------------------
</TABLE>

                                     FS-3
<PAGE>

<TABLE>
<CAPTION>
                                                            PAR
                                               MATURITY    (000)      VALUE
<S>                                            <C>      <C>       <C>
FINANCIAL - MULTIPLE INDUSTRY - (CONTINUED)
5.43%                                          01/28/00  $ 25,000  $   24,438,146
- ---------------------------------------------------------------------------------
National Rural Utilities Cooperative Finance
5.14%                                          09/20/99    33,000      32,910,478
- ---------------------------------------------------------------------------------
UBS Finance ( Delaware) Inc.
4.82%                                          12/23/99    25,000      24,621,764
- ---------------------------------------------------------------------------------
4.79%                                          12/27/99    40,000      39,377,300
- ---------------------------------------------------------------------------------
                                                                      414,122,366
- ---------------------------------------------------------------------------------

INSURANCE - LIFE/HEALTH - 0.87%

Prudential Funding Corp.
4.85%                                          11/09/99    30,000      29,721,125
- ---------------------------------------------------------------------------------
5.72%                                          01/28/00    25,000      24,408,139
- ---------------------------------------------------------------------------------
                                                                       54,129,264
- ---------------------------------------------------------------------------------
  Total Financial                                                   2,258,734,966
- ---------------------------------------------------------------------------------
  Total Commercial Paper (Cost $2,710,784,869)                      2,411,457,749
- ---------------------------------------------------------------------------------

BANK NOTES - 1.05%

First Union National Bank
5.49%                                          11/23/99    40,000      40,000,000
- ---------------------------------------------------------------------------------
National City Bank Cleveland
5.51%(b)                                       04/03/00    25,000      24,994,257
- ---------------------------------------------------------------------------------
 Total Bank Notes (Cost $64,994,257)                                   64,994,257
- ---------------------------------------------------------------------------------

CERTIFICATES OF DEPOSIT - 4.03%

ABN-Amro Bank
5.71%                                          07/03/00    25,000      24,991,972
- ---------------------------------------------------------------------------------
Bank Austria
5.65%                                          07/06/00    25,000      24,989,858
- ---------------------------------------------------------------------------------
Barclays Bank PLC
5.61%                                          06/14/00    25,000      24,990,577
- ---------------------------------------------------------------------------------
Chase-USA-Delaware
5.37%                                          05/22/00    25,000      24,993,931
- ---------------------------------------------------------------------------------
Deutsche Bank AG
5.29%                                          05/19/00    25,000      24,990,545
- ---------------------------------------------------------------------------------
National Westminster Bank
5.67%                                          07/03/00    25,000      24,993,976
- ---------------------------------------------------------------------------------
UBS AG
5.24%                                          03/01/00    25,000      24,992,804
- ---------------------------------------------------------------------------------
5.35%                                          05/30/00    25,000      24,991,051
- ---------------------------------------------------------------------------------
5.60%                                          06/14/00    25,000      24,990,576
- ---------------------------------------------------------------------------------
U.S. Bank NA Minneapolis
5.68%                                          06/12/00    25,000      25,000,000
- ---------------------------------------------------------------------------------
  Total Certificates of Deposit (Cost $249,925,290)                   249,925,290
- ---------------------------------------------------------------------------------
</TABLE>


                                     FS-4
<PAGE>

<TABLE>
<CAPTION>
                                                           PAR
                                              MATURITY    (000)       VALUE
<S>                                           <C>       <C>      <C>
COMMERCIAL PAPER TRUST CERTIFICATES - 4.04%

Citibank Securities, Inc. 5.60%(c)
  (Cost $250,000,000)                         12/28/99  $250,000  $   250,000,000
- ---------------------------------------------------------------------------------

NOTE AGREEMENTS - 28.02%

General Motors Acceptance Corp.
5.17%(d)                                      09/01/99    50,000       50,000,000
- ---------------------------------------------------------------------------------
5.21%(d)                                      09/01/99   100,000      100,000,000
- ---------------------------------------------------------------------------------
5.36%(d)                                      10/01/99    50,000       49,776,808
- ---------------------------------------------------------------------------------
5.40%(d)                                      10/01/99   100,000       99,550,312
- ---------------------------------------------------------------------------------
Goldman Sachs Group, L.P.
5.18%(e)                                      10/18/99   300,000      300,000,000
- ---------------------------------------------------------------------------------
Goldman Sachs Mortgage Corp.
5.44% (f)                                     09/20/99   100,000      100,000,000
- ---------------------------------------------------------------------------------
Liquid Asset Backed Securities Trust
5.35%(g)                                      11/26/99   246,337      246,336,676
- ---------------------------------------------------------------------------------
Merrill Lynch Mortgage Capital Inc.
5.82%(h)                                      08/17/00   357,000      357,000,000
- ---------------------------------------------------------------------------------
Morgan (J.P.) Securities, Inc.
5.69%(i)                                      11/01/99   245,000      245,000,000
- ---------------------------------------------------------------------------------
Morgan Stanley, Dean Witter, Discover & Co.
5.66%(j)                                      11/22/99   188,000      188,000,000
- ---------------------------------------------------------------------------------
  Total Note Agreements (Cost $1,735,663,796)                       1,735,663,796
- ---------------------------------------------------------------------------------

MEDIUM TERM NOTES - 1.14%

Asset Securitization Cooperative Corp.
5.38%(k)                                      02/01/00    35,000       34,992,615
- ---------------------------------------------------------------------------------
AT&T Corp.
5.27%(l)                                      07/13/00    25,000       24,991,366
- ---------------------------------------------------------------------------------
SMM Trust 1999-E
5.322%(l)                                     04/05/00    10,750       10,750,000
- ---------------------------------------------------------------------------------
  Total Medium Term Notes (Cost $70,733,981)                           70,733,981
- ---------------------------------------------------------------------------------

REVENUE BONDS - 2.30%

Belk, Inc.
5.4%(m)(n)                                    07/01/08    63,200       63,200,000
- ---------------------------------------------------------------------------------
BMC Special Care Facilities
5.3%(m)(n)                                    11/15/29    20,000       20,000,000
- ---------------------------------------------------------------------------------
Brosis Finance, LLC
5.35%(m)(n)                                   09/01/19    20,000       20,000,000
- ---------------------------------------------------------------------------------
Connecticut State Housing Financing
Authority
5.35%(m)(n)                                   11/15/16    19,205       19,205,000
- ---------------------------------------------------------------------------------
Southeastern Retirement Associates, LLC
5.4%(m)(n)                                    08/01/19    20,000       20,000,000
- ---------------------------------------------------------------------------------
  Total Revenue Bonds (Cost $142,405,000)                             142,405,000
- ---------------------------------------------------------------------------------
</TABLE>


                                     FS-5
<PAGE>

<TABLE>
<CAPTION>
                                                        PAR
                                            MATURITY   (000)       VALUE
<S>                                         <C>       <C>     <C>
TIME DEPOSITS - 16.83%
Amsouth Bank of Birmingham AL Cayman
5.69%                                       09/01/99  $165,000 $  165,000,000
- -----------------------------------------------------------------------------
Bank Austria Cayman
5.56%                                       09/01/99   224,000    224,000,000
- -----------------------------------------------------------------------------
Chase Bank USA Cayman
5.56%                                       09/01/99   240,000    240,000,000
- -----------------------------------------------------------------------------
Credit Suisse First Boston Cayman
5.63%                                       09/01/99    48,871     48,870,824
- -----------------------------------------------------------------------------
Norwest Bank, Minnesota Cayman
5.63%                                       09/01/99   165,000    165,000,000
- -----------------------------------------------------------------------------
Suntrust Bank Atlanta Cayman
5.63%                                       09/01/99   200,000    200,000,000
- -----------------------------------------------------------------------------
  Total Time Deposits (Cost $1,042,870,824)                     1,042,870,824
- -----------------------------------------------------------------------------

REPURCHASE AGREEMENTS(o) - 6.35%
Bear, Stearns & Co. Inc.
5.51%(p)                                          --   200,000    200,000,000
- -----------------------------------------------------------------------------
Deutsche Bank Securities, Inc.
5.51%(q)                                          --   150,000    150,000,000
- -----------------------------------------------------------------------------
Warburg Dillon Read LLC
5.55%(r)                                    09/01/99    43,378     43,378,483
- -----------------------------------------------------------------------------
  Total Repurchase Agreements (Cost $393,378,483)                 393,378,483
- -----------------------------------------------------------------------------
TOTAL INVESTMENTS - 102.69%                                     6,361,429,380(s)
- -----------------------------------------------------------------------------
OTHER LIABILITIES LESS ASSETS - (2.69)%                          (166,934,029)
- -----------------------------------------------------------------------------
NET ASSETS - 100.00%                                           $6,194,495,351
=============================================================================
</TABLE>

NOTES TO SCHEDULE OF INVESTMENTS:
(a) Some commercial paper is traded on a discount basis. In such cases the
    interest rate shown represents the rate of discount paid or received at the
    time of purchase by the Portfolio.
(b) Interest rates are redetermined daily. Rate shown is the rate in effect on
    08/31/99.
(c) Variable rate trust certificates representing an interest in a trust
    (comprised of eligible debt obligations) entitling the Portfolio to receive
    variable rate interest. The Fund has the right, upon seven calendar days'
    notice to the trustee, to put its certificates to the trust at par value
    plus accrued interest. Because variable rate trust certificates involve a
    trust and a third party put feature, they involve complexities and
    potential risks that may not be present where the debt obligation is owned
    directly. Rate shown is the rate in effect on 08/31/99.
(d) The portfolio may demand prepayment of notes purchased under the Note
    Purchase Agreement upon seven business days' notice.
(e) The Portfolio may demand prepayment of notes purchased under the Master
    Note Purchase Agreement upon seven business days' notice. Interest rates on
    master notes are redetermined periodically. Rate shown is the rate in
    effect on 08/31/99.
(f) The Portfolio may demand prepayment of notes purchased under the Master
    Note Purchase Agreement upon one business days' notice. Interest rates on
    master notes are redetermined periodically. Rate shown is the rate in
    effect on 08/31/99.
(g) The Portfolio may demand prepayment of notes purchased under the Master
    Note Purchase Agreement upon seven business days' notice. Interest rates on
    master notes are redetermined periodically. Rate shown is the rate in
    effect on 08/31/99.
(h) The Portfolio may demand prepayment of notes purchased under the Master
    Note Purchase Agreement upon two business days' notice. Interest rates on
    master notes are redetermined periodically. Rate shown is the rate in
    effect on 08/31/99.
(i) The Portfolio may demand prepayment of notes purchased under the Master
    Note Purchase Agreement upon one business days' notice. Interest rates on
    master notes are redetermined periodically. Rate shown is the rate in
    effect on 08/31/99.
(j) Master Note Purchase Agreement may be terminated by either party upon three
    business days' prior written notice, at which time all amounts outstanding
    under the notes purchased under the Master Note Agreement will become
    payable. Interest rates on master notes are redetermined periodically. Rate
    shown is the rate in effect on 08/31/99.
(k) Interest rates are redetermined monthly. Rate shown is the rate in effect
    on 08/31/99.
(l) Interest rates are redetermined quarterly. Rate shown is the rate in effect
    on 08/31/99.
(m) Demand security; payable upon demand by the Fund with usually no more than
    seven calendar days' notice. Interest rates are redetermined periodically.
    Rate shown is in effect on 08/31/99.
(n) Secured by a letter of credit.
(o) Collateral on repurchase agreements, including the Portfolio's pro-rata
    interest in joint repurchase agreements, is taken into possession by the
    Portfolio upon entering into the repurchase agreement. The collateral is
    marked to market daily to ensure its market value is at least 102% of the
    sales price of the repurchase agreement. The investments in some repurchase
    agreements are through participation in joint accounts with other mutual
    funds, private accounts and certain non-registered investment companies
    managed by the investment advisor or its affiliates.
(p) Open joint repurchase agreement. Either party may terminate the agreement
    upon demand. Interest rates, par and collateral are redetermined daily.
    Collateralized by $272,695,821 U.S. Government obligations, 0% to 9.50% due
    04/01/01 to 08/01/33 with an aggregate market value at 08/31/99 of
    $274,569,940.
(q) Open joint repurchase agreement. Either party may terminate the agreement
    upon demand. Interest rates, par and collateral are redetermined daily.
    Collateralized by $256,125,337 U.S. Government obligations, 6.00% to 7.50%
    due 05/01/12 to 11/01/28 with an aggregate market value at 08/31/99 of
    $204,000,000.
(r) Joint repurchase agreement entered into 08/31/99 with a maturing value of
    $100,015,417. Collateralized by $102,040,000 U.S. Government obligations,
    0% to 6.73% due 11/02/99 to 06/22/09 with an aggregate market value at
    08/31/99 of $102,002,704.
(s) Also represents cost for federal income tax purposes.

See Notes to Financial Statements.

                                     FS-6
<PAGE>

STATEMENT OF ASSETS AND LIABILITIES
August 31, 1999

<TABLE>
<S>                                                       <C>
ASSETS:

Investments, at value (amortized cost)                    $6,361,429,380
- ------------------------------------------------------------------------
Interest receivable                                           13,446,695
- ------------------------------------------------------------------------
Investment for deferred compensation plan                         68,320
- ------------------------------------------------------------------------
Other assets                                                   1,066,900
- ------------------------------------------------------------------------
  Total assets                                             6,376,011,295
- ------------------------------------------------------------------------

LIABILITIES:

Payables for:
 Investments purchased                                       149,327,120
- ------------------------------------------------------------------------
 Dividends                                                    31,089,809
- ------------------------------------------------------------------------
 Deferred compensation                                            68,320
- ------------------------------------------------------------------------
Accrued administrative services fees                              17,721
- ------------------------------------------------------------------------
Accrued advisory fees                                            355,513
- ------------------------------------------------------------------------
Accrued distribution fees                                        209,284
- ------------------------------------------------------------------------
Accrued transfer agent fees                                       84,825
- ------------------------------------------------------------------------
Accrued operating expenses                                       363,352
- ------------------------------------------------------------------------
  Total liabilities                                          181,515,944
- ------------------------------------------------------------------------
NET ASSETS                                                $6,194,495,351
========================================================================

NET ASSETS:

Institutional Class                                       $4,541,935,494
========================================================================
Private Investment Class                                  $  266,030,885
========================================================================
Personal Investment Class                                 $      993,991
========================================================================
Cash Management Class                                     $1,078,777,407
========================================================================
Resource Class                                            $  306,757,574
========================================================================

CAPITAL STOCK, $.001 PAR VALUE PER SHARE:

Institutional Class                                        4,541,904,502
========================================================================
Private Investment Class                                     266,032,341
========================================================================
Personal Investment Class                                        993,991
========================================================================
Cash Management Class                                      1,078,751,891
========================================================================
Resource Class                                               306,769,839
========================================================================

NET ASSET VALUE PER SHARE:

Net asset value, offering and redemption price per share           $1.00
========================================================================
</TABLE>

See Notes to Financial Statements.

                                     FS-7
<PAGE>

STATEMENT OF OPERATIONS
For the year ended August 31, 1999

<TABLE>
<S>                                                   <C>
INVESTMENT INCOME:

Interest income                                        $333,976,773
- -------------------------------------------------------------------

EXPENSES:

Advisory fees                                             9,813,465
- -------------------------------------------------------------------
Custodian fees                                              290,863
- -------------------------------------------------------------------
Administrative services fees                                155,139
- -------------------------------------------------------------------
Distribution fees (Note 2)                                2,195,209
- -------------------------------------------------------------------
Directors' fees and expenses                                 52,725
- -------------------------------------------------------------------
Transfer agent fees                                         720,090
- -------------------------------------------------------------------
Other                                                       788,169
- -------------------------------------------------------------------
  Total expenses                                         14,015,660
- -------------------------------------------------------------------
Less: Fee waivers                                        (6,804,321)
- -------------------------------------------------------------------
  Net expenses                                            7,211,339
- -------------------------------------------------------------------
Net investment income                                   326,765,434
- -------------------------------------------------------------------
Net realized gain on sales of investments                   672,252
- -------------------------------------------------------------------
Net increase in net assets resulting from operations   $327,437,686
===================================================================
</TABLE>

See Notes to Financial Statements.

                                     FS-8
<PAGE>

STATEMENT OF CHANGES IN NET ASSETS
For the year ended August 31, 1999 and 1998
<TABLE>
<CAPTION>
                                                                1999            1998
                                                          --------------  --------------
<S>                                                      <C>             <C>
OPERATIONS:

 Net investment income                                    $  326,765,434  $  231,962,632
- ----------------------------------------------------------------------------------------
 Net realized gain on sales of investments                       672,252         750,940
- ----------------------------------------------------------------------------------------
  Net increase in net assets resulting from operations       327,437,686     232,713,572
- ----------------------------------------------------------------------------------------
Distributions to shareholders from net investment income:
  Institutional Class                                       (264,791,600)   (207,681,074)
- ----------------------------------------------------------------------------------------
  Private Investment Class                                    (9,376,339)     (3,506,724)
- ----------------------------------------------------------------------------------------
  Personal Class                                                  (3,765)             --
- ----------------------------------------------------------------------------------------
  Cash Management Class                                      (46,551,990)    (16,114,306)
- ----------------------------------------------------------------------------------------
  Resource Class                                              (6,041,740)     (4,660,528)
- ----------------------------------------------------------------------------------------
Capital stock transactions -- net (See Note 4)             2,284,209,435    (113,347,634)
- ----------------------------------------------------------------------------------------
  Net increase (decrease) in net assets                    2,284,881,687    (112,596,694)
- ----------------------------------------------------------------------------------------

NET ASSETS:

  Beginning of period                                      3,909,613,664   4,022,210,358
- ----------------------------------------------------------------------------------------
  End of period                                           $6,194,495,351  $3,909,613,664
========================================================================================

NET ASSETS CONSIST OF:

  Capital (par value and additional paid-in)              $6,194,452,564  $3,910,243,129
- ----------------------------------------------------------------------------------------
  Undistributed net realized gain (loss) on sales of
    investment securities                                         42,787        (629,465)
- ----------------------------------------------------------------------------------------
                                                          $6,194,495,351  $3,909,613,664
========================================================================================
</TABLE>

See Notes to Financial Statements.

                                     FS-9
<PAGE>

NOTES TO FINANCIAL STATEMENTS
August 31, 1999

NOTE 1 - SIGNIFICANT ACCOUNTING POLICIES

Short-Term Investments Co. (the "Fund") is registered under the Investment
Company Act of 1940, as amended, as an open-end series, diversified management
investment company. The Fund is organized as a Maryland corporation consisting
of two different portfolios, each of which offers separate series of shares:
the Prime Portfolio and the Liquid Assets Portfolio. Information presented in
these financial statements pertains only to the Liquid Assets Portfolio (the
"Portfolio") with the assets, liabilities and operations of each portfolio
accounted for separately. The Portfolio currently offers six different classes
of shares: the Institutional Class, the Cash Management Class, the Private
Investment Class, the Personal Investment Class, the Reserve Class, and the
Resource Class. Sales of the Reserve Class have not yet commenced. Matters
affecting each class are voted on exclusively by the shareholders of each
class. The Portfolio is a money market fund whose objective is the maximization
of current income to the extent consistent with the preservation of capital and
the maintenance of liquidity.
   The preparation of financial statements in conformity with generally accepted
accounting principles requires management to make estimates and assumptions
that affect the reported amounts of assets and liabilities at the date of the
financial statements and the reported amounts of revenues and expenses during
the reporting period. Actual results could differ from those estimates. The
following is a summary of significant accounting policies followed by the
Portfolio in the preparation of its financial statements.
A. Security Valuations - The Portfolio's securities are valued on the basis of
   amortized cost which approximates market value. This method values a
   security at its cost on the date of purchase and thereafter assumes a
   constant amortization to maturity of any discount or premium.
B. Securities Transactions, Investment Income and Distributions - Securities
   transactions are accounted for on a trade date basis. Realized gains or
   losses are computed on the basis of specific identification of the
   securities sold. Interest income, adjusted for amortization of premiums and
   discounts on investments, is accrued daily. Dividends to shareholders are
   declared daily and are paid on the first business day of the following
   month.
C. Federal Income Taxes - The Portfolio intends to comply with the requirements
   of the Internal Revenue Code necessary to qualify as a regulated investment
   company and, as such, will not be subject to federal income taxes on
   otherwise taxable income (including net realized capital gains) which is
   distributed to shareholders. Therefore, no provision for federal income
   taxes is recorded in the financial statements.
D.  Expenses - Distribution expenses directly attributable to a class of shares
    are charged to that class' operations. All other expenses which are
    attributable to more than one class are allocated among the classes.

NOTE 2 - ADVISORY FEES AND OTHER TRANSACTIONS WITH AFFILIATES

The Fund has entered into a master investment advisory agreement with A I M
Advisors, Inc. ("AIM"). Under the terms of the master investment advisory
agreement, AIM receives a monthly fee with respect to the Portfolio at the
annual rate of 0.15% of the average daily net assets of the Portfolio. During
the year ended August 31, 1999, AIM waived fees of $6,215,196.
   The Fund, pursuant to a master administrative services agreement with AIM,
has agreed to pay AIM for certain administrative costs incurred in providing
accounting services to the Fund. During the year ended August 31, 1999, AIM was
paid $155,139 for such services.
   The Fund, pursuant to a transfer agency and service agreement, has agreed to
pay A I M Fund Service, Inc. ("AFS") a fee for providing transfer agent and
shareholder services to the Fund. During the year ended August 31, 1999, AFS was
paid $720,090 for such services.


                                     FS-10
<PAGE>

   Under the terms of a master distribution agreement between Fund Management
Company ("FMC") and the Fund, FMC acts as the exclusive distributor of the
Fund's shares. The Fund has adopted a master distribution plan (the "Plan")
pursuant to Rule 12b-1 under the 1940 Act with respect to the Private
Investment Class, the Personal Investment Class, the Cash Management Class, the
Reserve Class, and the Resource Class of the Portfolio. The Plan provides that
the Private Investment Class, the Personal Investment Class, the Cash
Management Class, the Reserve Class, and the Resource Class pay up to a 0.50%,
0.75%, 0.10%, 1.00%, and 0.20%, respectively, maximum annual rate of the
average daily net assets attributable to such class. Of this amount, the Fund
may pay an asset-based sales charge to FMC and the Fund may pay a service fee
of (a) 0.25% of the average daily net assets of each of the Private Investment
Class, Personal Investment Class, and the Reserve Class, (b) 0.10% of the
average daily net assets of the Cash Management Class and (c) 0.20% of the
average daily net assets of the Resource Class, to selected banks, broker-
dealers and other financial institutions who offer continuing personal
shareholder services to their customers who purchase and own shares of the
Private Investment Class, the Personal Investment Class, the Cash Management
Class, the Reserve Class, or the Resource Class. Any amounts not paid as a
service fee under such Plan would constitute an asset-based sales charge. The
Plan also imposes a cap on the total amount of sales charges, including asset-
based sales charges, that may be paid by the Portfolio with respect to each
class. During the year ended August 31, 1999, the Private Investment Class, the
Personal Investment Class, the Cash Management Class and the Resource Class
paid $600,673, $407, $753,887, and $251,117, respectively, as compensation
under the Plan. FMC waived fees of $589,125 for the same period. Certain
officers and directors of the Fund are officers of AIM, FMC and AFS.
   During the year ended August 31, 1999, the Fund paid legal fees of $15,490
for services rendered by Kramer, Levin, Naftalis & Frankel LLP as counsel to the
Board of Directors. A member of that firm is a director of the Fund.

NOTE 3 - DIRECTORS' FEES

Directors' fees represent remuneration paid to directors who are not an
"interested person" of AIM. The Fund may invest directors' fees, if so elected
by a director, in mutual fund shares in accordance with a deferred compensation
plan.

NOTE 4 - SHARE INFORMATION

Changes in shares outstanding during the years ended August 31, 1999 and 1998
were as follows:

<TABLE>
<CAPTION>
                                        1999                                1998
                         -----------------------------------  ---------------------------------
                              SHARES            AMOUNT            SHARES            AMOUNT
                         ----------------  -----------------  ---------------  ----------------
<S>                      <C>               <C>                <C>              <C>
Sold:
  Institutional Class               153,902,899,999  $ 153,902,899,999   93,828,246,640  $ 93,828,246,640
- ---------------------------------------------------------------------------------------------------------
  Private Investment Class            4,203,510,271      4,203,510,271      427,983,177       427,983,177
- ---------------------------------------------------------------------------------------------------------
  Personal Investment Class*              1,117,987          1,117,987               --                --
- ---------------------------------------------------------------------------------------------------------
  Cash Management Class              14,321,528,231     14,321,528,231    4,263,088,877     4,263,088,877
- ---------------------------------------------------------------------------------------------------------
  Resource Class**                    2,669,302,439      2,669,302,439    1,649,842,930     1,649,842,930
- ---------------------------------------------------------------------------------------------------------
Issued as reinvestment of dividends:
  Institutional Class                    32,251,894         32,251,894       38,210,037        38,210,037
- ---------------------------------------------------------------------------------------------------------
  Private Investment Class                3,157,926          3,157,926        3,283,004         3,283,004
- ---------------------------------------------------------------------------------------------------------
  Personal Investment Class*                    255                255               --                --
- ---------------------------------------------------------------------------------------------------------
  Cash Management Class                  34,021,495         34,021,495       10,309,246        10,309,246
- ---------------------------------------------------------------------------------------------------------
  Resource Class**                        5,318,298          5,318,298        4,593,118         4,593,118
- ---------------------------------------------------------------------------------------------------------
Reacquired:
  Institutional Class              (152,491,320,126)  (152,491,320,126) (94,557,041,875)  (94,557,041,875)
- ---------------------------------------------------------------------------------------------------------
  Private Investment Class           (4,010,706,089)    (4,010,706,089)    (432,076,106)     (432,076,106)
- ---------------------------------------------------------------------------------------------------------
  Personal Investment Class*               (124,251)          (124,251)              --                --
- ---------------------------------------------------------------------------------------------------------
  Cash Management Class             (13,932,834,793)   (13,932,834,793)  (3,700,876,338)   (3,700,876,338)
- ---------------------------------------------------------------------------------------------------------
  Resource Class**                   (2,453,914,101)    (2,453,914,101)  (1,648,910,344)   (1,648,910,344)
- ---------------------------------------------------------------------------------------------------------
Net increase (decrease)               2,284,209,435  $   2,284,209,435     (113,347,634) $   (113,347,634)
=========================================================================================================
</TABLE>
 *  The Personal Investment Class commenced sales on June 22, 1999.
**  The MSTC Cash Reserve Class was renamed to the Resource Class on
    October 1, 1998.

                                     FS-11
<PAGE>

INDEPENDENT AUDITORS' REPORT

To the Board of Directors and Shareholders
Short-Term Investments Co.:

We have audited the accompanying statement of assets and liabilities of Liquid
Assets Portfolio (a series portfolio of Short-Term Investments Co.), including
the schedule of investments, as of August 31, 1999, and the related statement
of operations for the year then ended, the statement of changes in net assets
for each of the two years in the period then ended, and the financial
highlights for each of the three years in the period then ended and the period
January 17, 1996 (date sales commenced for the Cash Management Class) through
August 31, 1996. These financial statements and financial highlights are the
responsibility of the Fund's management. Our responsibility is to express an
opinion on these financial statements and financial highlights based on our
audits.
   We conducted our audits in accordance with generally accepted auditing
standards. 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. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the financial
statements. Our procedures included confirmation of securities owned as of
August 31, 1999 by correspondence with the custodian and brokers. An audit also
includes assessing the accounting principles used and significant estimates
made by management, as well as evaluating the overall financial statement
presentation. 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
Liquid Assets Portfolio as of August 31, 1999, the results of its operations
for the year then ended, the changes in its net assets for each of the two
years in the period then ended, and the financial highlights for each of the
three years in the period then ended and the period January 17, 1996 (date
sales commenced for the Cash Management Class) through August 31, 1996, in
conformity with generally accepted accounting principles.

/s/ KPMG LLP
KPMG LLP

October 1, 1999
Houston, Texas

                                     FS-12
<PAGE>

NOTE 5 - FINANCIAL HIGHLIGHTS

Shown below are the financial highlights for a share of Cash Management Class
capital stock outstanding for each of the years in the three year period ended
August 31, 1999 and the period January 17, 1996 (date sales commenced) through
August 31, 1996.

<TABLE>
<CAPTION>
                                                             1999          1998     1997     1996
                                                          ----------     --------  -------  -------
<S>                                                      <C>            <C>       <C>      <C>
Net asset value, beginning of period                      $     1.00     $   1.00  $  1.00  $  1.00
- -------------------------------------------------------   ----------     --------  -------  -------
Income from investment operations:
  Net investment income                                         0.05         0.06     0.05     0.03
- -------------------------------------------------------   ----------     --------  -------  -------
Less distributions:
  Dividends from net investment income                         (0.05)       (0.06)   (0.05)   (0.03)
- -------------------------------------------------------   ----------     --------  -------  -------
Net asset value, end of period                            $     1.00     $   1.00  $  1.00  $  1.00
=======================================================   ==========     ========  =======  =======
Total return                                                    5.09%        5.66%    5.50%    3.32%
=======================================================   ==========     ========  =======  =======
Ratios/supplemental data:
Net assets, end of period (000s omitted)                  $1,078,777     $655,975  $83,487  $53,209
=======================================================   ==========     ========  =======  =======
Ratio of expenses to average net assets(a)                      0.17%(b)     0.16%    0.15%    0.10%(c)
=======================================================   ==========     ========  =======  =======
Ratio of net investment income to average net assets(d)         4.94%(b)     5.51%    5.38%    5.27%(c)
=======================================================   ==========     ========  =======  =======
</TABLE>

(a) After fee waivers and/or expense reimbursements. Ratios of expenses to
    average net assets prior to fee waivers and/or expense reimbursements were
    0.28%, 0.28%, 0.28% and 0.34% (annualized) for the periods 1999-1996,
    respectively.
(b) Ratios based on average net assets of $942,340,346.
(c) Annualized.
(d) After fee waivers and/or expense reimbursements. Ratios of net investment
    income to average net assets prior to fee waivers and/or expense
    reimbursements were 4.83%, 5.39%, 5.25% and 5.03% (annualized) for the
    periods 1999-1996, respectively.

                                     FS-13
<PAGE>

INDEPENDENT AUDITORS' REPORT

To the Board of Directors and Shareholders
Short-Term Investments Co.:

We have audited the accompanying statement of assets and liabilities of Liquid
Assets Portfolio (a series portfolio of Short-Term Investments Co.), including
the schedule of investments, as of August 31, 1999, and the related statement
of operations for the year then ended, the statement of changes in net assets
for each of the two years in the period then ended, and the financial
highlights for each of the five years in the period then ended. These financial
statements and financial highlights are the responsibility of the Fund's
management. Our responsibility is to express an opinion on these financial
statements and financial highlights based on our audits.
 We conducted our audits in accordance with generally accepted auditing
standards. 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. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the financial
statements. Our procedures included confirmation of securities owned as of
August 31, 1999 by correspondence with the custodian and brokers. An audit also
includes assessing the accounting principles used and significant estimates
made by management, as well as evaluating the overall financial statement
presentation. 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
Liquid Assets Portfolio as of August 31, 1999, the results of its operations
for the year then ended, the changes in its net assets for each of the two
years in the period then ended, and the financial highlights for each of the
five years in the period then ended, in conformity with generally accepted
accounting principles.

/s/ KPMG LLP
KPMG LLP

October 1, 1999
Houston, Texas

                                     FS-14
<PAGE>

NOTE 5 - FINANCIAL HIGHLIGHTS

Shown below are the financial highlights for a share of Institutional Class
capital stock outstanding for each of the years in the five-year period ended
August 31, 1999.

<TABLE>
<CAPTION>
                            1999           1998        1997        1996        1995
                         ----------     ----------  ----------  ----------  ----------
<S>                      <C>            <C>         <C>         <C>         <C>
Net asset value,
 beginning of period     $     1.00     $     1.00  $     1.00  $     1.00  $     1.00
- -----------------------  ----------     ----------  ----------  ----------  ----------
Income from investment
 operations:
  Net investment income        0.05           0.06        0.05        0.06        0.06
- -----------------------  ----------     ----------  ----------  ----------  ----------
Less distributions:
  Dividends from net
   investment income          (0.05)         (0.06)      (0.05)      (0.06)      (0.06)
- -----------------------  ----------     ----------  ----------  ----------  ----------
Net asset value, end of
 period                  $     1.00     $     1.00  $     1.00  $     1.00  $     1.00
=======================  ==========     ==========  ==========  ==========  ==========
Total return                   5.17%          5.74%       5.58%       5.68%       5.83%
=======================  ==========     ==========  ==========  ==========  ==========
Ratios/supplemental
 data:
Net assets, end of
 period (000s omitted)   $4,541,935     $3,097,539  $3,787,357  $1,988,755  $1,287,463
=======================  ==========     ==========  ==========  ==========  ==========
Ratio of expenses to
 average net assets(a)         0.09%(b)       0.08%       0.06%       0.03%       0.11%
=======================  ==========     ==========  ==========  ==========  ==========
Ratio of net investment
 income to average net
 assets(c)                     5.02%(b)       5.59%       5.46%       5.52%       5.69%
=======================  ==========     ==========  ==========  ==========  ==========
</TABLE>
(a) After fee waivers and/or expense reimbursements. Ratios of expenses to
    average net assets prior to fee waivers and/or expense reimbursements were
    0.18%, 0.18%, 0.18%, 0.18% and 0.18% for the periods 1999-1995,
    respectively.
(b) Ratios based on average net assets of $5,274,113,513.
(c) After fee waivers and/or expense reimbursements. Ratios of net investment
    income to average net assets prior to fee waivers and/or expense
    reimbursements were 4.92%, 5.49%, 5.34%, 5.37% and 5.62% for the periods
    1999-1995, respectively.

                                     FS-15
<PAGE>

INDEPENDENT AUDITORS' REPORT

To the Board of Directors and Shareholders
Short-Term Investments Co.:

We have audited the accompanying statement of assets and liabilities of Liquid
Assets Portfolio (a series portfolio of Short-Term Investments Co.), including
the schedule of investments, as of August 31, 1999, and the related statement
of operations for the year then ended, the statement of changes in net assets
for each of the two years in the period then ended, and the financial
highlights for the period June 22, 1999 (date sales commenced for the Personal
Investment Class) through August 31, 1999. These financial statements and
financial highlights are the responsibility of the Fund's management. Our
responsibility is to express an opinion on these financial statements and
financial highlights based on our audits.
 We conducted our audits in accordance with generally accepted auditing
standards. 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. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the financial
statements. Our procedures included confirmation of securities owned as of
August 31, 1999 by correspondence with the custodian and brokers. An audit also
includes assessing the accounting principles used and significant estimates
made by management, as well as evaluating the overall financial statement
presentation. 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
Liquid Assets Portfolio as of August 31, 1999, the results of its operations
for the year then ended, the changes in its net assets for each of the two
years in the period then ended, and the financial highlights for the period
June 22, 1999 (date sales commenced for the Personal Investment Class) through
August 31, 1999, in conformity with generally accepted accounting principles.

/s/ KPMG LLP
KPMG LLP

October 1, 1999
Houston, Texas

                                     FS-16
<PAGE>

NOTE 5 - FINANCIAL HIGHLIGHTS

Shown below are the financial highlights for a share of Personal Investment
Class capital stock outstanding during the period June 22, 1999 (date sales
commenced) through August 31, 1999.

<TABLE>
<CAPTION>
                                                         1999
                                                         -----
<S>                                                      <C>
Net asset value, beginning of period                     $1.00
- -------------------------------------------------------  -----
Income from investment operations:
  Net investment income                                   0.01
- -------------------------------------------------------  -----
Less distributions:
  Dividends from net investment income                   (0.01)
- -------------------------------------------------------  -----
Net asset value, end of period                           $1.00
=======================================================  =====
Total return(a)                                           1.15%
=======================================================  =====
Ratios/supplemental data:
Net assets, end of period (000s omitted)                 $ 994
=======================================================  =====
Ratio of expenses to average net assets(b)                0.59%(c)
=======================================================  =====
Ratio of net investment income to average net assets(d)   4.52%(c)
=======================================================  =====
</TABLE>
(a) Not annualized for periods less than one year.
(b) After fee waivers and/or expense reimbursements. Ratios of expenses to
    average net assets prior to fee waivers and/or expense reimbursements were
    0.93% (annualized).
(c) Ratios are annualized and based on average net assets of $418,310.
(d) After fee waivers and/or expense reimbursements. Ratios of net investment
    income to average net assets prior to fee waivers and/or expense
    reimbursements were 4.17% (annualized).

                                     FS-17
<PAGE>

INDEPENDENT AUDITORS' REPORT

To the Board of Directors and Shareholders
Short-Term Investments Co.:

We have audited the accompanying statement of assets and liabilities of Liquid
Assets Portfolio (a series portfolio of Short-Term Investments Co.), including
the schedule of investments, as of August 31, 1999, and the related statement
of operations for the year then ended, the statement of changes in net assets
for each of the two years in the period then ended, and the financial
highlights for each of the three years in the period then ended and the period
February 16, 1996 (date sales commenced for the Private Investment Class)
through August 31, 1996. These financial statements and financial highlights
are the responsibility of the Fund's management. Our responsibility is to
express an opinion on these financial statements and financial highlights based
on our audits.
 We conducted our audits in accordance with generally accepted auditing
standards. 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. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the financial
statements. Our procedures included confirmation of securities owned as of
August 31, 1999 by correspondence with the custodian and brokers. An audit also
includes assessing the accounting principles used and significant estimates
made by management, as well as evaluating the overall financial statement
presentation. 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
Liquid Assets Portfolio as of August 31, 1999, the results of its operations
for the year then ended, the changes in its net assets for each of the two
years in the period then ended, and the financial highlights for each of the
three years in the period then ended and the period February 16, 1996 (date
sales commenced for the Private Investment Class) through August 31, 1996, in
conformity with generally accepted accounting principles.

/s/ KPMG LLP
KPMG LLP

October 1, 1999
Houston, Texas

                                     FS-18
<PAGE>

NOTE 5 - FINANCIAL HIGHLIGHTS

Shown below are the financial highlights for a share of Private Investment
Class capital stock outstanding for each of the years in the three-year period
ended August 31, 1999 and the period February 16, 1996 (date sales commenced)
through August 31, 1996.

<TABLE>
<CAPTION>
                                      1999        1998     1997     1996
                                    --------     -------  -------  -------
<S>                                 <C>          <C>      <C>      <C>
Net asset value, beginning of
 period                             $   1.00     $  1.00  $  1.00  $  1.00
- ----------------------------------  --------     -------  -------  -------
Income from investment operations:
  Net investment income                 0.05        0.05     0.05     0.03
- ----------------------------------  --------     -------  -------  -------
Less distributions:
  Dividends from net investment
   income                              (0.05)      (0.05)   (0.05)   (0.03)
- ----------------------------------  --------     -------  -------  -------
Net asset value, end of period      $   1.00     $  1.00  $  1.00  $  1.00
==================================  ========     =======  =======  =======
Total return                            4.85%       5.43%    5.27%    2.74%
==================================  ========     =======  =======  =======
Ratios/supplemental data:
Net assets, end of period (000s
 omitted)                           $266,031     $70,058  $70,856  $44,981
==================================  ========     =======  =======  =======
Ratio of expenses to average net
 assets(a)                              0.39%(b)    0.38%    0.36%    0.32%(c)
==================================  ========     =======  =======  =======
Ratio of net investment income to
 average net assets(d)                  4.72%(b)    5.29%    5.16%    5.04%(c)
==================================  ========     =======  =======  =======
</TABLE>
(a) After fee waivers and/or expense reimbursements. Ratios of expenses to
    average net assets prior to fee waivers and/or expense reimbursements were
    0.68%, 0.68%, 0.68% and 0.69% (annualized) for the periods 1999-1996,
    respectively.
(b) Ratios based on average net assets of $200,227,919.
(c) Annualized.
(d) After fee waivers and/or expense reimbursements. Ratios of net investment
    income to average net assets prior to fee waivers and/or expense
    reimbursements were 4.42%, 4.99%, 4.84% and 4.67% (annualized) for the
    periods 1999-1996, respectively.

                                     FS-19
<PAGE>

INDEPENDENT AUDITORS' REPORT

To the Board of Directors and Shareholders
Short-Term Investments Co.:

We have audited the accompanying statement of assets and liabilities of Liquid
Assets Portfolio (a series portfolio of Short-Term Investments Co.), including
the schedule of investments, as of August 31, 1999, and the related statement
of operations for the year then ended, the statement of changes in net assets
for each of the two years in the period then ended and financial highlights for
each of the two years in the period then ended and the period September 23,
1996 (date sales commenced for the Resource Class) through August 31, 1997.
These financial statements and financial highlights are the responsibility of
the Fund's management. Our responsibility is to express an opinion on these
financial statements and financial highlights based on our audits.
 We conducted our audits in accordance with generally accepted auditing
standards. 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. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the financial
statements. Our procedures included confirmation of securities owned as of
August 31, 1999 by correspondence with the custodian and brokers. An audit also
includes assessing the accounting principles used and significant estimates
made by management, as well as evaluating the overall financial statement
presentation. 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
Liquid Assets Portfolio as of August 31, 1999, the results of its operations
for the year then ended, the changes in its net assets for each of the two
years in the period ended and financial highlights for each of the two years in
the period then ended and the period September 23, 1996 (date sales commenced
for the Resource Class) through August 31, 1997, in conformity with generally
accepted accounting principles.

/s/ KPMG LLP
KPMG LLP

October 1, 1999
Houston, Texas

                                     FS-20
<PAGE>

NOTE 5 - FINANCIAL HIGHLIGHTS

Shown below are the financial highlights for a share of Resource Class capital
stock outstanding for each of the years in the two-year period ended August 31,
1999 and the period September 23, 1996 (date sales commenced) through August
31, 1997.

<TABLE>
<CAPTION>
                                              1999        1998     1997
                                            --------     -------  -------
<S>                                         <C>          <C>      <C>
Net asset value, beginning of period        $   1.00     $  1.00  $  1.00
- ------------------------------------------  --------     -------  -------
Income from investment operations:
  Net investment income                         0.05        0.05     0.05
- ------------------------------------------  --------     -------  -------
Less distributions:
  Dividends from net investment income         (0.05)      (0.05)   (0.05)
- ------------------------------------------  --------     -------  -------
Net asset value, end of period              $   1.00     $  1.00  $  1.00
==========================================  ========     =======  =======
Total return                                    4.96%       5.53%    5.04%
==========================================  ========     =======  =======
Ratios/supplemental data:
Net assets, end of period (000s omitted)    $306,758     $86,041  $80,510
==========================================  ========     =======  =======
Ratio of expenses to average net assets(a)      0.29%(b)    0.28%    0.27%(c)
==========================================  ========     =======  =======
Ratio of net investment income to average
 net assets(d)                                  4.82%(b)    5.40%    5.34%(c)
==========================================  ========     =======  =======
</TABLE>
(a) After fee waivers and/or expense reimbursements. Ratios of expenses to
    average net assets prior to fee waivers and/or expense reimbursements were
    0.38%, 0.38% and 0.39% (annualized) for the periods 1999-1997,
    respectively.
(b) Ratios based on average net assets of $125,571,582.
(c) Annualized.
(d) After fee waivers and/or expense reimbursements. Ratios of net investment
    income to average net assets prior to fee waivers and/or expense
    reimbursements were 4.72%, 5.30% and 5.22% (annualized) for the periods
    1999-1997, respectively.

                                     FS-21
<PAGE>

[AIM LOGO]


CASH MANAGEMENT CLASS

PRIME PORTFOLIO
                                                PROSPECTUS
                                                DECEMBER 17, 1999



Prime Portfolio seeks to maximize current income consistent with the
preservation of capital and the maintenance of liquidity.

This prospectus contains important information about the Cash Management Class
of the fund. Please read it before investing and keep it for future reference.

As with all other mutual fund securities, the Securities and Exchange Commission
has not approved or disapproved these securities or determined whether the
information in this prospectus is adequate or accurate. Anyone who tells you
otherwise is committing a crime.

There can be no assurance that the fund will be able to maintain a stable net
asset value of $1.00 per share.



                                       1
<PAGE>

                               TABLE OF CONTENTS
                                                              Page
<TABLE>
<CAPTION>
<S>                                                           <C>
Investment Objective and Strategies........................... 3

Principal Risks of Investing in the Fund...................... 3

Performance Information......................................  5
     Annual Total Returns....................................  5
     Performance Table.......................................  6

Fee Table and Expense Example................................  7
     Fee Table...............................................  7
     Expense Example.........................................  7

Fund Management..............................................  8
     The Advisor.............................................  8
     Advisor Compensation....................................  8

Other Information............................................  9
     Suitability for Investors...............................  9
     Dividends and Distributions.............................  9

Financial Highlights......................................... 10

Shareholder Information...................................... 11
     Distribution and Service (12b-1) Fees................... 11
     Purchasing Shares....................................... 11
     Redeeming Shares........................................ 11
     Pricing of Shares....................................... 12
     Taxes................................................... 13
</TABLE>
Obtaining Additional Information.................Back Cover Page



The AIM Family of Funds, The AIM Family of Funds and Design (i.e., the AIM
logo), AIM and Design, AIM, AIM LINK, AIM Institutional Funds, aimfunds.com, La
Familia AIM de Fondos, La Familia AIM de Fondos and Design and Invest with
Discipline are registered service marks and AIM Bank Connection, AIM Funds, AIM
Funds and Design, AIM Internet Connect and AIM Investor are service marks of
A I M Management Group Inc.

No dealer, salesperson or any other person has been authorized to give any
information or to make any representations other than those contained in this
prospectus, and you should not rely on such other information or
representations.


                                       2
<PAGE>

INVESTMENT OBJECTIVE AND STRATEGIES

The fund's investment objective is to maximize current income consistent with
the preservation of capital and the maintenance of liquidity.

The fund attempts to meet this objective by investing only in high-quality U.S.
dollar denominated obligations with maturities of 60 days or less, including:

 . securities issued by the U.S. Government or its agencies;

 . bankers' acceptances, certificates of deposit and time deposits from banks;

 . repurchase agreements;

 . commercial paper;

 . taxable municipal securities; and

 . master notes.

The fund will generally maintain a weighted average maturity of 40 days or less.
The fund invests in compliance with Rule 2a-7 under the Investment Company Act
of 1940.

The portfolio managers focus on securities they believe have favorable prospects
for current income consistent with the preservation of capital and liquidity.
The portfolio managers usually hold portfolio securities to maturity, but may
sell a particular security when they deem it advisable, such as when any of the
factors above materially changes.

In anticipation of or in response to adverse market conditions, for cash
management purposes or for defensive purposes, the fund may temporarily hold all
or a portion of its assets in cash or shares of affiliated money market funds.
As a result, the fund may not achieve its investment objective.

PRINCIPAL RISKS OF INVESTING IN THE FUND

An investment in the fund is not a deposit of a bank and is not insured or
guaranteed by the Federal Deposit Insurance Corporation or any other government
agency.  Although the fund seeks to preserve the value of your investment at
$1.00 per share, it is possible to lose money by investing in the fund.
Additionally, the fund's yield will vary as the short-term securities in its
portfolio mature and the proceeds are reinvested in securities with different
interest rates.

The following factors could reduce the fund's income and/or share price:

 . sharply rising interest rates;

 . downgrades of credit ratings or defaults of any of the fund's holdings; and

 . the risks generally associated with concentrating investments in the banking
  industry, such as interest rate risk, credit risk and regulatory developments
  relating to the banking and financial services industries.

If the seller of a repurchase agreement in which the fund invests defaults on
its obligation or declares bankruptcy, the fund may experience delays in selling
the securities underlying the repurchase agreement. As a result, the fund may
incur losses arising from a decline in the value of those securities, reduced
levels of income and expenses of enforcing its rights.

The value of your shares could be adversely affected if the computer systems
used by the fund's investment advisor and the fund's other service providers are
unable to distinguish the year 2000 from the year 1900.


                                       3
<PAGE>

The fund's investment advisor and independent technology consultants are working
to avoid year 2000-related problems in its systems and to obtain assurances that
other service providers are taking similar steps. Year 2000 problems may also
affect issuers in whose securities the fund invests.

                                       4
<PAGE>

PERFORMANCE INFORMATION

The bar chart and table shown below provide an indication of the risks of
investing in the fund.  The fund's past performance is not necessarily an
indication of its future performance.

ANNUAL TOTAL RETURNS

The following bar chart shows changes in the performance of the Cash Management
Class shares from year to year.  The Cash Management Class shares are not
subject to sales loads.

Cash Management Class

[Bar Chart Appears Here]

Year      Return (%)
1995        5.95%
1996        5.39%
1997        5.54%
1998        5.51%

The Cash Management Class shares' year-to-date total return as of September 30,
1999 was 3.71%.

During the periods shown in the bar chart, the highest quarterly return was
1.49% (quarter ended June 30, 1995) and the lowest quarterly return was 1.29%
(quarter ended December 31, 1998).


                                       5
<PAGE>

PERFORMANCE TABLE

The following performance table reflects the performance of Cash Management
Class shares over the periods indicated.

<TABLE>
<CAPTION>
- ----------------------------------------------------------------------------------------------
       Average Annual Total Returns
 (for the periods ended December 31, 1998)
                                                                           Since     Inception
                                             1 Year   5 Years  10 Years  Inception     Date
- ----------------------------------------------------------------------------------------------
<S>                                          <C>      <C>      <C>       <C>         <C>
Cash Management Class                          5.51%       --        --       5.52%   06/30/94
- ----------------------------------------------------------------------------------------------
</TABLE>


Cash Management Class shares' seven-day yield on December 31, 1998 was 5.08%.
For the current seven-day yield, call (800) 877-7745.

                                       6
<PAGE>

FEE TABLE AND EXPENSE EXAMPLE

FEE TABLE

This table describes the fees and expenses that you may pay if you buy and hold
shares of the fund:


<TABLE>
<CAPTION>

                                                           Cash Management Class
                                                           ---------------------
<S>                                                        <C>
Shareholder Fees (fees paid directly from your investment)

  Maximum Sales Charge (Load) Imposed on Purchases
    (as a percentage of offering price)                            None

  Maximum Deferred Sales Charge (Load)
    (as a percentage of original purchase price
    or redemption proceeds, whichever is less)                     None

Annual Fund Operating Expenses (expenses that are deducted
  from fund assets)

  Management Fees                                                  0.06%
  Distribution and/or Service (12b-1) Fees                         0.10
  Other Expenses                                                   0.03
  Total Annual Fund Operating Expenses                             0.19
  Fee Waiver(1)                                                    0.02
  Net Expenses                                                     0.17
- ----------------
</TABLE>
(1) The distributor has contractually agreed to waive 0.02% of the Rule 12b-1
    distribution plan fee.

You should also consider the effect of any account fees charged by the financial
institution managing the account.

EXPENSE EXAMPLE

This example is intended to help you compare the costs of investing in the Cash
Management Class of the fund with the cost of investing in other mutual funds.

The example assumes that you invest $10,000 in the fund for the time periods
indicated and then redeem all of your shares at the end of those periods. The
example also assumes that your investment has a 5% return each year and that the
fund's gross operating expenses remain the same. To the extent fees are waived
or expenses are reimbursed, the expenses will be lower. Although your actual
returns and costs may be higher or lower, based on these assumptions your costs
would be:

<TABLE>
<CAPTION>
                       1 Year    3 Years   5 Years   10 Years
                       ------    -------   -------   --------
<S>                    <C>       <C>       <C>       <C>

Cash Management Class   $19        $61       $107       $243

</TABLE>

                                       7
<PAGE>

FUND MANAGEMENT

THE ADVISOR

A I M Advisors, Inc. (the advisor) serves as the fund's investment advisor and
is responsible for its day-to-day management. The advisor is located at 11
Greenway Plaza, Suite 100, Houston, Texas 77046-1173. The advisor supervises all
aspects of the fund's operations and provides investment advisory services to
the fund, including obtaining and evaluating economic, statistical and financial
information to formulate and implement investment programs for the fund.

The advisor has acted as an investment advisor since its organization in 1976.
Today, the advisor, together with its subsidiaries, advises or manages over 125
investment portfolios, including the fund, encompassing a broad range of
investment objectives.

ADVISOR COMPENSATION

During the fiscal year ended August 31, 1999, the advisor received compensation
of 0.06% of average daily net assets.

                                       8
<PAGE>

OTHER INFORMATION

SUITABILITY FOR INVESTORS

The Cash Management Class of the fund is intended for use primarily by
institutional customers of banks, certain broker-dealers and other financial
institutions (institutions). It is expected that the shares of the Cash
Management Class may be particularly suitable investments for corporate cash
managers, municipalities or other public entities. Individuals, corporations,
partnerships and other businesses that maintain qualified accounts at an
institution may invest in shares of the Cash Management Class. Each institution
will render administrative support services to its customers who are the
beneficial owners of the shares of the Cash Management Class. Such services
include, among other things, establishment and maintenance of shareholder
accounts and records; assistance in processing purchase and redemption
transactions in shares of the Cash Management Class; providing periodic
statements showing a client's account balance in shares of the Cash Management
Class; distribution of fund proxy statements, annual reports and other
communications to shareholders whose accounts are serviced by the institution;
and such other services as the fund may reasonably request. Institutions will be
required to certify to the fund that they comply with applicable state law
regarding registration as broker-dealers, or that they are exempt from such
registration.

The Cash Management Class is designed to be a convenient and economical way to
invest in an open-end diversified money market fund. It is anticipated that most
investors will perform their own subaccounting.

Investors in the Cash Management Class have the opportunity to receive a
somewhat higher yield than might be obtainable through direct investment in
money market instruments, and enjoy the benefits of diversification, economies
of scale and same-day liquidity. Generally, higher interest rates can be
obtained on the purchase of very large blocks of money market instruments. Of
course, any such relative increase in interest rates may be offset to some
extent by the operating expenses of the Cash Management Class.

DIVIDENDS AND DISTRIBUTIONS

Dividends

The fund generally declares dividends on each business day and pays dividends
monthly. A business day is any day on which both the Federal Reserve Bank of New
York and The Bank of New York, the fund's custodian, are open for business.

Dividends are paid on settled shares of the fund as of 4:00 p.m. Eastern time.
Generally, shareholders whose purchase orders have been received by the fund
prior to 4:00 p.m. Eastern time and shareholders whose redemption proceeds have
not been wired to them on any business day are eligible to receive dividends on
that business day. The dividend declared on any day preceding a non-business day
of the fund will include the income accrued on such non-business day. Dividends
and distributions are paid in cash unless the shareholder has elected to have
such dividends and distributions reinvested in the form of additional full and
fractional shares at net asset value.

Capital Gains Distributions

The fund generally distributes net realized capital gains (including net short-
term capital gains), if any, annually. The fund does not expect to realize any
long-term capital gains and losses.

                                       9
<PAGE>

FINANCIAL HIGHLIGHTS

The financial highlights table is intended to help you understand the financial
performance of the Cash Management Class.  Certain information reflects
financial results for a single fund share.

The total returns in the table represent the rate that an investor would have
earned (or lost) on an investment in the fund (assuming reinvestment of all
dividends and distributions).

This information has been audited by KPMG LLP, whose report, along with the
fund's financial statements, is included in the fund's annual report, which is
available upon request.

<TABLE>
<CAPTION>
                                                                          Cash Management Class
                                                          --------------------------------------------------
                                                                           Year Ended August 31,

                                                             1999       1998      1997      1996      1995
                                                          ----------  --------  --------  --------  --------
<S>                                                       <C>         <C>       <C>       <C>       <C>
Net asset value, beginning of period                         $1.00      $1.00     $1.00     $1.00     $1.00
- ------------------------------------------------------------------------------------------------------------
Income from investment operations:
  Net investment income                                       0.05       0.05      0.05      0.05      0.06
- ------------------------------------------------------------------------------------------------------------
  Less distributions:
    Dividends from net investment income                     (0.05)     (0.05)    (0.05)    (0.05)    (0.06)
- ------------------------------------------------------------------------------------------------------------
Net asset value, end of period                               $1.00      $1.00     $1.00     $1.00     $1.00
- ------------------------------------------------------------------------------------------------------------
Total return                                                  5.07%      5.62%     5.45%     5.55%     5.71%
- ------------------------------------------------------------------------------------------------------------
Ratios/supplemental data:
Net assets, end of period (000s omitted)                  $1,253,799  $862,207  $767,304  $507,247  $194,479
- ------------------------------------------------------------------------------------------------------------
Ratio of expenses to average net assets (a)                 0.17%(b)   0.17%      0.17%     0.17%     0.17%
- ------------------------------------------------------------------------------------------------------------
Ratio of net investment income to average net assets (c)    4.94%(b)   5.48%      5.33%     5.38%     5.69%
- ------------------------------------------------------------------------------------------------------------
</TABLE>
(a) After fee waivers and/or expense reimbursement. Ratios of expenses to
    average net assets prior to fee waivers and/or expense reimbursements were
    0.19%, 0.19%, 0.19%, 0.19%, and 0.32% for the periods 1999-1995,
    respectively.
(b) Ratio based on average net assets of $1,168,802,213.
(c) After fee waivers and/or expense reimbursement. Ratios of net investment
    income to average net assets prior to fee waivers and/or expense
    reimbursements were 4.92%, 5.46%, 5.31%, 5.36% and 5.54% for the periods
    1999-1995, respectively.
                                       10
<PAGE>

SHAREHOLDER INFORMATION

The fund currently offers six classes of shares all of which share a common
investment objective and portfolio of investments. The six classes differ only
with respect to distribution arrangements for different categories of investors.

DISTRIBUTION AND SERVICE (12b-1) FEES

The fund has adopted a 12b-1 plan with respect to the Cash Management Class that
allows the fund to pay distribution fees to Fund Management Company (the
distributor) for the sale and distribution of its shares and fees for services
provided to shareholders. Because the fund pays these fees out of its assets on
an ongoing basis, over time these fees will increase the cost of your investment
and may cost you more than paying other types of sales charges.

PURCHASING SHARES

The minimum initial investment in the Cash Management Class is $1 million. No
minimum amount is required for subsequent investments in the fund, nor are
minimum balances required.

Purchase orders will be accepted for execution on the day the order is placed,
provided that the order is properly submitted and received by the transfer agent
prior to 4:00 p.m. Eastern time on a business day of the fund. Purchase orders
received after such time will be processed at the next day's net asset value.
You may purchase shares by submitting an Account Application to the fund's
transfer agent, A I M Fund Services, Inc. (transfer agent) at P.O. Box 4497,
Houston, Texas 77210-4497 prior to your initial purchase of shares. An investor
must open a fund account through an institution in accordance with procedures
established by such institution. You must open a fund account through an
institution in accordance with procedures established by such institution. A
purchase order is considered received at the time The Bank of New York receives
federal funds (member bank deposits with a Federal Reserve Bank) for the order,
provided the transfer agent has received notice of the order or at the time the
order is placed, if the fund is assured of payment. You may obtain an Account
Application from the distributor. Subsequent purchases of shares of the funds
may also be made via AIM LINK--Registered Trademark--Remote, a personal computer
application software product.

If you propose to open a fund account with an institution, you should consult
with a representative of such institution to obtain a description of the rules
governing such an account. A statement with regard to your investment in the
Cash Management Class is supplied periodically, and confirmations of all
transactions for your account are provided by the institution promptly upon
request. In addition, proxies, periodic reports and other information from the
institution with regard to your shares of the Cash Management Class will be sent
to you.

You may place an order for the purchase of shares of the Cash Management Class
with the institution. The institution is responsible for the prompt transmission
of the order to the transfer agent. The fund is normally required to make
immediate settlement in federal funds for portfolio securities purchased.
Accordingly, payment for shares of the Cash Management Class purchased by
institutions on behalf of their clients must be in federal funds. If an order to
purchase shares is paid for other than in federal funds, the order may be
delayed up to two business days while the institution completes the conversion
into federal funds.

REDEEMING SHARES

You may redeem any or all of your shares at the net asset value next determined
after receipt of a redemption request in proper form by the fund. There is no
charge for redemption. Redemption requests with respect to shares of the Cash
Management Class are normally made through a customer's institution.

                                      11
<PAGE>

You may request a redemption by calling the transfer agent at (800) 877-7745, or
by using AIM LINK--Registered Trademark--Remote. Payment for redeemed shares is
normally made by Federal Reserve wire to the commercial bank account designated
in your Account Application. You may also request that payment be made by check.
We use reasonable procedures to confirm that instructions communicated by
telephone are genuine and are not liable for telephone instructions that are
reasonably believed to be genuine. Such reasonable procedures may include
recordings of telephone transactions maintained for a reasonable period of time.

Payment for redemption orders received prior to 4:00 p.m. Eastern time will
normally be made on the same day. Payment for shares redeemed by mail and
payment for telephone redemptions in amounts of less than $1,000 may be made by
check mailed within seven days after receipt of the redemption request in proper
form. The fund may make payment for telephone redemptions in excess of $1,000 by
check when it is considered to be in the fund's best interest to do so.

Dividends payable up to the date of redemption on redeemed shares will normally
be paid by wire transfer on the next dividend payment date. However, if all of
the shares in your account are redeemed, you will receive dividends payable up
to the date of redemption with the proceeds of the redemption.

THE FUND AND ITS AGENTS RESERVE THE RIGHT AT ANY TIME TO:
 . REJECT OR CANCEL ANY PART OF ANY PURCHASE ORDER;
 . MODIFY ANY TERMS OR CONDITIONS OF PURCHASE OF SHARES OF THE FUND; OR
 . WITHDRAW ALL OR ANY PART OF THE OFFERING MADE BY THIS PROSPECTUS.

PRICING OF SHARES

Determination of Net Asset Value

The price of each of the fund's shares is the fund's net asset value per share.
The fund determines the net asset value of its shares as of 4:00 p.m. Eastern
time on each day on which both the Federal Reserve Bank of New York and The Bank
of New York are open for business (business day). The fund values portfolio
securities on the basis of amortized cost, which approximates market value.

Timing of Orders

The fund prices purchase and redemption orders at the net asset value calculated
after the transfer agent receives an order in good form. If the transfer agent
receives a redemption request on a business day prior to 4:00 p.m. Eastern time,
the fund will normally wire redemption proceeds on that day. If the transfer
agent receives a redemption request after 4:00 p.m. Eastern time, the redemption
will be processed at the net asset value next determined. Shareholders will
accrue dividends until the day the fund wires redemption proceeds. The fund may
postpone the right of redemption only under unusual circumstances, as allowed by
the Securities and Exchange Commission, such as when the New York Stock Exchange
restricts or suspends trading. The fund reserves the right to change the time
for which purchase and redemption orders must be submitted to and received by
the transfer agent for execution on the same day on any day when the primary
government securities dealers are either closed for business or close early, or
trading in money market securities is limited due to national holidays.

                                      12
<PAGE>

TAXES

Dividends and distributions received are taxable as ordinary income [or long-
term capital gains] for federal income tax purposes, whether reinvested in
additional shares or taken in cash. Distributions are taxable at different rates
depending on the length of time the fund holds its assets. [Different tax rates
apply to ordinary income and long-term capital gain distributions, regardless of
how long shares are held.] Every year, information will be sent showing the
amount of dividends and distributions received from the fund during the prior
year.

[Any long-term or short-term capital gains realized from redemptions of the fund
shares will be subject to federal income tax.]

The foreign, state and local tax consequences of investing in the fund may
differ materially from the federal income tax consequences described above.
Shareholders should consult their tax advisor before investing.

                                      13
<PAGE>

                               [BACK COVER PAGE]

OBTAINING ADDITIONAL INFORMATION

More information may be obtained free of charge upon request. The Statement of
Additional Information (SAI), a current version of which is on file with the
Securities and Exchange Commission (SEC), contains more details about the fund
and is incorporated by reference into the prospectus (is legally a part of this
prospectus). Annual and semiannual reports to shareholders contain additional
information about the fund's investments. The fund's annual report also
discusses the market conditions and investment strategies that significantly
affected the fund's performance during its last fiscal year.

If you have questions about this fund, another fund in The AIM Family of
Funds--Registered Trademark--or your account, or wish to obtain free copies of
the fund's current SAI or annual or semiannual reports, please contact us

BY MAIL:          A I M Fund Services, Inc.
                  P.O. Box 4497
                  Houston, TX 77210-4497

BY TELEPHONE:     (800) 877-7745

BY E-MAIL:        [email protected]

ON THE INTERNET:  http://www.aimfunds.com (prospectuses and annual and
                  semiannual reports only)

You also can review and obtain copies of the fund's SAI, reports and other
information at the SEC's Public Reference Room in Washington, DC; on the EDGAR
database on the SEC's Internet website (http://www.sec.gov); or, after paying a
duplication fee, by sending a letter to the SEC's Public Reference Section,
Washington, DC 20549-0102 or by sending an electronic mail request to
[email protected]. Please call the SEC at 1-202-942-8090 for information about
the Public Reference Room.



Prime Portfolio
SEC 1940 Act file number:  811-7892

                                Back Cover Page
<PAGE>

[AIM LOGO]


INSTITUTIONAL CLASS

PRIME PORTFOLIO
                                                PROSPECTUS
                                                DECEMBER 17, 1999



Prime Portfolio seeks to maximize current income consistent with the
preservation  of capital and the maintenance of liquidity.

This prospectus contains important information about the Institutional Class of
the fund.  Please read it before investing and keep it for future reference.

As with all other mutual fund securities, the Securities and Exchange Commission
has not approved or disapproved these securities or determined whether the
information in this prospectus is adequate or accurate. Anyone who tells you
otherwise is committing a crime.

There can be no assurance that the fund will be able to maintain a stable net
asset value of $1.00 per share.

                                       1
<PAGE>

                               TABLE OF CONTENTS
<TABLE>
<CAPTION>
                                                                            Page
<S>                                                                        <C>
Investment Objective and Strategies.......................................   3

Principal Risks of Investing in the Fund..................................   3

Performance Information...................................................   5
  Annual Total Returns....................................................   5
  Performance Table.......................................................   6

Fee Table and Expense Example.............................................   7
  Fee Table...............................................................   7
  Expense Example.........................................................   7

Fund Management...........................................................   8
  The Advisor.............................................................   8
  Advisor Compensation....................................................   8

Other Information.........................................................   9
  Suitability for Investors...............................................   9
  Dividends and Distributions.............................................   9

Financial Highlights......................................................  10

Shareholder Information...................................................  11
  Purchasing Shares.......................................................  11
  Redeeming Shares........................................................  11
  Pricing of Shares.......................................................  12
  Taxes...................................................................  13
Obtaining Additional Information.............................  Back Cover Page
</TABLE>


The AIM Family of Funds, The AIM Family of Funds and Design (i.e., the AIM
logo), AIM and Design, AIM, AIM LINK, AIM Institutional Funds, aimfunds.com, La
Familia AIM de Fondos, La Familia AIM de Fondos and Design and Invest with
Discipline are registered service marks and AIM Bank Connection, AIM Funds, AIM
Funds and Design, AIM Internet Connect and AIM Investor are service marks of
A I M Management Group Inc.

No dealer, salesperson or any other person has been authorized to give any
information or to make any representations other than those contained in this
prospectus, and you should not rely on such other information or
representations.

                                       2
<PAGE>

INVESTMENT OBJECTIVE AND STRATEGIES

The fund's investment objective is to maximize current income consistent with
the preservation of capital and the maintenance of liquidity.

The fund attempts to meet this objective by investing only in high-quality U.S.
dollar denominated obligations with maturities of  60 days or less, including:

 . securities issued by the U.S. Government or its agencies;

 . bankers' acceptances, certificates of deposit and time deposits from banks;

 . repurchase agreements;

 . commercial paper;

 . taxable municipal securities; and

 . master notes.

The fund will generally maintain a weighted average maturity of 40 days or less.
The fund invests in compliance with Rule 2a-7 under the Investment Company Act
of 1940.

The portfolio managers focus on securities they believe have favorable prospects
for current income consistent with the preservation of capital and liquidity.
The portfolio managers usually hold portfolio securities to maturity, but may
sell a particular security when they deem it advisable, such as when any of the
factors above materially changes.

In anticipation of or in response to adverse market conditions, for cash
management purposes or for defensive purposes, the fund may temporarily hold all
or a portion of its net assets in cash or shares of affiliated money market
funds. As a result, the fund may not achieve its investment objective.

PRINCIPAL RISKS OF INVESTING IN THE FUND

An investment in the fund is not a deposit of a bank and is not insured or
guaranteed by the Federal Deposit Insurance Corporation or any other government
agency.  Although the fund seeks to preserve the value of your investment at
$1.00 per share, it is possible to lose money by investing in the fund.
Additionally, the fund's yield will vary as the short-term securities in its
portfolio mature and the proceeds are reinvested in securities with different
interest rates.

The following factors could reduce the fund's income and/or share price:

 . sharply rising interest rates;

 . downgrades of credit ratings or defaults of any of the fund's holdings; and

 . the risks generally associated with concentrating investments in the banking
  industry, such as interest rate risk, credit risk and regulatory developments
  relating to the banking and financial services industries.

If the seller of a repurchase agreement in which the fund invests defaults on
its obligation or declares bankruptcy, the fund may experience delays in selling
the securities underlying the repurchase agreement.  As a result, the fund may
incur losses arising from a decline in the value of those securities, reduced
levels of income and expenses of enforcing its rights.

The value of your shares could be adversely affected if the computer systems
used by the fund's investment advisor and the fund's other service providers are
unable to distinguish the year 2000 from the year 1900.

                                       3
<PAGE>

The fund's investment advisor and independent technology consultants are working
to avoid year 2000-related problems in its systems and to obtain assurances that
other service providers are taking similar steps.  Year 2000 problems may also
affect issuers in whose securities the fund invests.

                                       4
<PAGE>

PERFORMANCE INFORMATION

The bar chart and table shown below provide an indication of the risks of
investing in the fund.  The fund's past performance is not necessarily an
indication of its future performance.

ANNUAL TOTAL RETURNS

The following bar chart shows changes in the performance of the Institutional
Class shares from year to year. The Institutional Class shares are not subject
to sales loads.

[GRAPH APPEARS HERE]

                              INSTITUTIONAL CLASS

Year     Return (%)

1989       9.54%
1990       8.48%
1991       6.13%
1992       3.74%
1993       3.16%
1994       4.32%
1995       6.04%
1996       5.48%
1997       5.63%
1998       5.59%


The Institutional Class shares' year-to-date total return as of September 30,
1999 was 3.77%.

During the periods shown in the bar chart, the highest quarterly return was
2.45% (quarter ended June 30, 1989) and the lowest quarterly return was 0.76%
(quarter ended June 30,1993).

                                       5
<PAGE>

PERFORMANCE TABLE

The following performance table reflects the performance of Institutional Class
shares over the periods indicated.

<TABLE>
<CAPTION>
======================================================================================================
       Average Annual Total Returns
(for the periods ended December 31, 1998)                                        Since      Inception
                                               1 Year    5 Years    10 Years    Inception      Date
- ------------------------------------------------------------------------------------------------------
<S>                                            <C>       <C>        <C>         <C>          <C>
Institutional Class                              5.59%      5.41%       5.79%        7.72%    11/10/80
======================================================================================================
</TABLE>


Institutional Class shares' seven-day yield on December 31, 1998 was 5.16%.  For
the current seven-day yield of Institutional Class shares, call (800) 659-1005.

                                       6
<PAGE>

FEE TABLE AND EXPENSE EXAMPLE

FEE TABLE

This table describes the fees and expenses that you may pay if you buy and hold
shares of the fund:

<TABLE>
<CAPTION>
                                                             Institutional Class
                                                             -------------------
<S>                                                          <C>
Shareholder Fees (fees paid directly from your investment)

  Maximum Sales Charge (Load) Imposed on Purchases
    (as a percentage of offering price)                                None
  Maximum Deferred Sales Charge (Load)
    (as a percentage of original purchase price
    or redemption proceeds, whichever is less)                         None

Annual Fund Operating Expenses (expenses that are deducted
  from fund assets)

  Management Fees                                                      0.06%
  Distribution and/or Service (12b-1) Fees                             None
  Other Expenses                                                       0.03
  Total Annual Fund Operating Expenses                                 0.09
- --------------------
</TABLE>
You should also consider the effect of any account fees charged by the financial
institution managing the account.

EXPENSE EXAMPLE

This example is intended to help you compare the costs of investing in the
Institutional Class of  the fund with the cost of investing in other mutual
funds.

The example assumes that you invest $10,000 in the fund for the time periods
indicated and then redeem all of your shares at the end of those periods.  The
example also assumes that your investment has a 5% return each year and that the
fund's gross operating expenses remain the same.  To the extent fees are waived
or expenses are reimbursed, the expenses will be lower.  Although your actual
returns and costs may be higher or lower, based on these assumptions your costs
would be:

                       1 Year    3 Years    5 Years     10 Years
                       ------    -------    -------     --------

Institutional Class      $9        $29      $51         $115

                                       7
<PAGE>

FUND MANAGEMENT

THE ADVISOR

A I M Advisors, Inc. (the advisor) serves as the fund's investment advisor and
is responsible for its day-to-day management.  The advisor is located at 11
Greenway Plaza, Suite 100, Houston, Texas 77046-1173.  The advisor supervises
all aspects of the fund's operations and provides investment advisory services
to the fund, including obtaining and evaluating economic, statistical and
financial information to formulate and implement investment programs for the
fund.

The advisor has acted as an investment advisor since its organization in 1976.
Today, the advisor, together with its subsidiaries, advises or manages over 125
investment portfolios, including the fund, encompassing a broad range of
investment objectives.

ADVISOR COMPENSATION

During the fiscal year ended August 31, 1999, the advisor received compensation
of 0.06% of average daily net assets.

                                       8
<PAGE>

OTHER INFORMATION

SUITABILITY FOR INVESTORS

The Institutional Class of the fund is intended for use primarily by
institutions, particularly banks.  Individuals, corporations, partnerships and
other businesses that maintain qualified accounts at an institution may invest
in shares of the Institutional Class.  Each institution will render
administrative support services to its customers who are the beneficial owners
of the shares of the Institutional Class.  Such services include, among other
things, establishment and maintenance of shareholder accounts and records;
assistance in processing purchase and redemption transactions in shares of the
Institutional Class; providing periodic statements showing a client's account
balance in shares of the Institutional Class; distribution of fund proxy
statements, annual reports and other communications to shareholders whose
accounts are serviced by the institution; and such other services as the fund
may reasonably request.  Institutions will be required to certify to the fund
that they comply with applicable state law regarding registration as broker-
dealers, or that they are exempt from such registration.

The Institutional Class is designed to be a convenient and economical way in
which to invest short-term cash reserve in an open-end diversified money market
fund.  It is anticipated that most investors will perform their own
subaccounting.

Investors in the Institutional Class have the opportunity to receive a somewhat
higher yield than might be obtainable through direct investment in money market
instruments, and enjoy the benefits of diversification, economies of scale and
same-day liquidity.  Generally, higher interest rates can be obtained on the
purchase of very large blocks of money market instruments.  Of course, any such
relative increase in interest rates may be offset to some extent by the
operating expenses of the Institutional Class.

DIVIDENDS AND DISTRIBUTIONS

Dividends

The fund generally declares dividends on each business day and pays dividends
monthly.  A business day is any day on which both the Federal Reserve Bank of
New York and The Bank of New York, the fund's custodian, are open for business.

Dividends are paid on settled shares of the fund as of 4:00 p.m. Eastern time.
Generally, shareholders whose purchase orders have been received by the fund
prior to 4:00 p.m. Eastern time and shareholders whose redemption proceeds have
not been wired to them on any business day are eligible to receive dividends on
that business day.  The dividend declared on any day preceding a non-business
day of the fund will include the income accrued on such non-business day.
Dividends and distributions are paid in cash unless the shareholder has elected
to have such dividends and distributions reinvested in the form of additional
full and fractional shares at net asset value.

Capital Gains Distributions

The fund generally distributes net realized capital gains (including net short-
term capital gains), if any, annually. The fund does not expect to realize any
long-term capital gains and losses.

                                       9
<PAGE>

FINANCIAL HIGHLIGHTS

The financial highlights table is intended to help you understand the financial
performance of the Institutional Class. Certain information reflects financial
results for a single fund share.

The total returns in the table represent the rate that an investor would have
earned (or lost) on an investment in the fund (assuming reinvestment of all
dividends and distributions).

This information has been audited by KPMG LLP, whose report, along with the
fund's financial statements, is included in the fund's annual report, which is
available upon request.

<TABLE>
<CAPTION>

                                                                                    Institutional Class
                                                           ----------------------------------------------------------------------
                                                                                    Year Ended August 31,
                                                              1999            1998          1997           1996            1995
                                                           ----------     ----------     ----------     ---------      ----------
<S>                                                        <C>            <C>            <C>            <C>            <C>
Net asset value, beginning of period                       $     1.00     $     1.00     $     1.00     $     1.00     $     1.00
- ------------------------------------------------------     ----------------------------------------------------------------------
Income from investment operations:
  Net investment income                                          0.05           0.06           0.05           0.05           0.06
- ------------------------------------------------------     ----------------------------------------------------------------------
  Less distributions:
    Dividends from net investment income                        (0.05)         (0.06)         (0.05)         (0.05)         (0.06)
- ------------------------------------------------------     ----------------------------------------------------------------------
Net asset value, end of period                             $     1.00     $     1.00     $     1.00     $     1.00     $     1.00
- ------------------------------------------------------     ----------------------------------------------------------------------
Total return                                                     5.04%          5.71%          5.54%          5.64%          5.80%
- ------------------------------------------------------     ----------------------------------------------------------------------
Ratios/supplemental data:
Net assets, end of period (000s omitted)                   $6,210,056     $5,843,813     $5,593,043     $5,264,601     $3,752,693
- ------------------------------------------------------     ----------------------------------------------------------------------
Ratio of expenses to average net assets(a)                       0.09%(a)       0.09%          0.09%          0.09%          0.09%
======================================================     ======================================================================
Ratio of net investment income (loss) to average
 net assets                                                      5.02%(a)       5.56%          5.40%          5.48%          5.64%
======================================================     ======================================================================
- ---------------
(a) Ratios based on average net assets of $7,248,383,889.

</TABLE>

                                       10
<PAGE>

SHAREHOLDER INFORMATION

The fund currently offers six classes of shares all of which share a common
investment objective and portfolio of investments.  The six classes differ only
with respect to distribution arrangements for different categories of investors.

PURCHASING SHARES

The minimum initial investment in the Institutional Class is $1 million.  No
minimum amount is required for subsequent investments in the fund, nor are
minimum balances required.

Purchase orders will be accepted for execution on the day the order is placed,
provided that the order is properly submitted and received by the transfer agent
prior to 4:00 p.m. Eastern time on a business day of the fund. Purchase orders
received after such time will be processed at the next day's net asset value.
You may purchase shares by submitting an Account Application to the fund's
transfer agent, A I M Fund Services, Inc. (transfer agent) at P.O. Box 4497,
Houston, Texas 77210-4497 prior to your initial purchase of shares.  You must
open a fund account through an institution in accordance with procedures
established by such institution.  A purchase order is considered received at the
time The Bank of New York receives federal funds (member bank deposits with a
Federal Reserve Bank) for the order, provided the transfer agent has received
notice of the order or at the time the order is placed, if the fund is assured
of payment.  You may obtain an Account Application from Fund Management Company
(the distributor).  Subsequent purchases of shares of the funds may also be made
via AIM LINK--Registered Trademark--Remote, a personal computer application
software product.

We may request that an institution maintain separate master accounts in the fund
for shares held by the institution (a) for its own account, for the account of
other institutions and for accounts for which the institution acts as a
fiduciary; and (b) for accounts for which the institution acts in some other
capacity.  An institution may aggregate its master accounts and subaccounts to
satisfy the minimum investment requirement.

If you propose to open a fund account with an institution, you should consult
with a representative of such institution to obtain a description of the rules
governing such an account.  A statement with regard to your investment in the
Institutional Class is supplied periodically, and confirmations of all
transactions for your account are provided by the institution promptly upon
request.  In addition, proxies, periodic reports and other information from the
institution with regard to your shares of the Institutional Class will be sent
to you.

You may place an order for the purchase of shares of the Institutional Class
with the institution.  The institution is responsible for the prompt
transmission of the order to the transfer agent.  The fund is normally required
to make immediate settlement in federal funds for portfolio securities
purchased.  Accordingly, payment for shares of the Institutional Class purchased
by institutions on behalf of their clients must be in federal funds.  If an
order to purchase shares is paid for other than in federal funds, the order may
be delayed up to two business days while the institution completes the
conversion into federal funds.

REDEEMING SHARES

You may redeem any or all of your shares at the net asset value next determined
after receipt of a redemption request in proper form by the fund.  There is no
charge for redemption.  Redemption requests with respect to shares of the
Institutional Class are normally made through a customer's institution.

You may request a redemption by calling the transfer agent at (800) 659-1005, or
by using AIM LINK--Registered Trademark--Remote. Payment for redeemed shares is
normally made by Federal Reserve wire to the commercial bank account designated
in your Account Application. You may also request that payment be made by check.
We use reasonable procedures to confirm that instructions communicated by
telephone are genuine and are not liable for telephone

                                       11
<PAGE>

instructions that are reasonably believed to be genuine. Such reasonable
procedures may include recordings of telephone transactions maintained for a
reasonable period of time.

Payment for redemption orders received prior to 4:00 p.m. Eastern time will
normally be made on the same day. Payment for shares redeemed by mail and
payment for telephone redemptions in amounts of less than $1,000 may be made by
check mailed within seven days after receipt of the redemption request in proper
form.  The fund may make payment for telephone redemptions in excess of $1,000
by check when it is considered to be in the fund's best interest to do so.

Dividends payable up to the date of redemption on redeemed shares will normally
be paid by wire transfer on the next dividend payment date.  However, if all of
the shares in your account are redeemed, you will receive dividends payable up
to the date of redemption with the proceeds of the redemption.

THE FUND AND ITS AGENTS RESERVE THE RIGHT AT ANY TIME TO:
 . REJECT OR CANCEL ANY PART OF ANY PURCHASE ORDER;
 . MODIFY ANY TERMS OR CONDITIONS OF PURCHASE OF SHARES OF THE FUND; OR
 . WITHDRAW ALL OR ANY PART OF THE OFFERING MADE BY THIS PROSPECTUS.

PRICING OF SHARES

DETERMINATION OF NET ASSET VALUE

The price of each of the fund's shares is the fund's net asset value per share.
The fund determines the net asset value of its shares as of 4:00 p.m. Eastern
time on each day on which both the Federal Reserve Bank of New York and The Bank
of New York are open for business (business day).  The fund values portfolio
securities on the basis of amortized cost, which approximates market value.

Timing of Orders

The fund prices purchase and redemption orders at the net asset value calculated
after the transfer agent receives an order in good form.  If the transfer agent
receives a redemption request on a business day prior to 4:00 p.m. Eastern time,
the fund will normally wire redemption proceeds on that day.  If the transfer
agent receives a redemption request after 4:00 p.m. Eastern time, the redemption
will be processed at the net asset value next determined.  Shareholders will
accrue dividends until the day the fund wires redemption proceeds.  The fund may
postpone the right of redemption only under unusual circumstances, as allowed by
the Securities and Exchange Commission, such as when the New York Stock Exchange
restricts or suspends trading.  The fund reserves the right to change the time
for which purchase and redemption orders must be submitted to and received by
the transfer agent for execution on the same day on any day when the primary
government securities dealers are either closed for business or close early, or
trading in money market securities is limited due to national holidays.

                                       12
<PAGE>

TAXES

Dividends and distributions received are taxable as ordinary income [or long-
term capital gains] for federal income tax purposes, whether reinvested in
additional shares or taken in cash.  Distributions are taxable at different
rates depending on the length of time the fund holds its assets.  [Different tax
rates apply to ordinary income and long-term capital gain distributions
regardless of how long shares are held.]  Every year, information will be sent
showing the amount of dividends and distributions received from the fund during
the prior year.

[Any long-term or short-term capital gains realized from redemptions of the fund
shares will be subject to federal income tax.]

The foreign, state and local tax consequences of investing in the fund may
differ materially from the federal income tax consequences described above.
Shareholders should consult their tax advisor before investing.

                                       13
<PAGE>

                               [BACK COVER PAGE]

OBTAINING ADDITIONAL INFORMATION

More information may be obtained free of charge upon request.  The Statement of
Additional Information (SAI), a current version of which is on file with the
Securities and Exchange Commission (SEC), contains more details about the fund
and is incorporated by reference into the prospectus (is legally a part of this
prospectus).  Annual and semiannual reports to shareholders contain additional
information about the fund's investments.  The fund's annual report also
discusses the market conditions and investment strategies that significantly
affected the fund's performance during its last fiscal year.

If you have questions about this fund, another fund in The AIM Family of
Funds--Registered Trademark--or your account, or wish to obtain free copies of
the fund's current SAI or annual or semiannual reports, please contact us

BY MAIL:         A I M Fund Services, Inc.
                 P. O. Box 4497
                 Houston, TX 77210-4497

BY TELEPHONE:    (800) 659-1005

BY E-MAIL:       [email protected]

ON THE INTERNET: http://www.aimfunds.com (prospectuses and annual and
                 semiannual reports only)

You also can review and obtain copies of the fund's SAI, reports and other
information at the SEC's Public Reference Room in Washington, DC; on the EDGAR
database on the SEC's Internet website (http://www.sec.gov); or, after paying a
duplication fee, by sending a letter to the SEC's Public Reference Section,
Washington, DC 20549-0102 or by sending an electronic mail request to
[email protected]. Please call the SEC at 1-202-942-8090 for information about
the Public Reference Room.


Prime Portfolio
SEC 1940 Act file number: 811-7892


                                Back Cover Page
<PAGE>

[AIM LOGO]


PERSONAL INVESTMENT CLASS

PRIME PORTFOLIO
                                                PROSPECTUS
                                                DECEMBER 17, 1999



Prime Portfolio seeks to maximize current income consistent with the
preservation of capital and the maintenance of liquidity.

This prospectus contains important information about the Personal Investment
Class of the fund. Please read it before investing and keep it for future
reference.

As with all other mutual fund securities, the Securities and Exchange Commission
has not approved or disapproved these securities or determined whether the
information in this prospectus is adequate or accurate. Anyone who tells you
otherwise is committing a crime.

There can be no assurance that the fund will be able to maintain a stable net
asset value of $1.00 per share.

                                       1
<PAGE>

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                            PAGE
<S>                                                                         <C>
Investment Objective and Strategies........................................  3

Principal Risks of Investing in the Fund...................................  3

Performance Information....................................................  5
    Annual Total Returns...................................................  5
    Performance Table......................................................  6

Fee Table and Expense Example..............................................  7
    Fee Table..............................................................  7
    Expense Example........................................................  7

Fund Management............................................................  8
    The Advisor............................................................  8
    Advisor Compensation...................................................  8

Other Information..........................................................  9
    Suitability for Investors..............................................  9
    Dividends and Distributions............................................  9

Financial Highlights....................................................... 10

Shareholder Information.................................................... 11
    Distribution and Service (12b-1) Fees.................................. 11
    Purchasing Shares...................................................... 11
    Redeeming Shares....................................................... 11
    Pricing of Shares...................................................... 12
    Taxes.................................................................. 13

Obtaining Additional Information.............................. Back Cover Page
</TABLE>

The AIM Family of Funds, The AIM Family of Funds and Design (i.e., the AIM
logo), AIM and Design, AIM, AIM LINK, AIM Institutional Funds, aimfunds.com, La
Familia AIM de Fondos, La Familia AIM de Fondos and Design and Invest with
Discipline are registered service marks and AIM Bank Connection, AIM Funds, AIM
Funds and Design, AIM Internet Connect and AIM Investor are service marks of
A I M Management Group Inc.

No dealer, salesperson or any other person has been authorized to give any
information or to make any representations other than those contained in this
prospectus, and you should not rely on such other information or
representations.

                                       2
<PAGE>

INVESTMENT OBJECTIVE AND STRATEGIES

The fund's investment objective is to maximize current income consistent with
the preservation of capital and the maintenance of liquidity.

The fund attempts to meet this objective by investing only in high-quality U.S.
dollar denominated obligations with maturities of  60 days or less, including:

 . securities issued by the U.S. Government or its agencies;

 . bankers' acceptances, certificates of deposit and time deposits from banks;

 . repurchase agreements;

 . commercial paper;

 . taxable municipal securities; and

 . master notes.

The fund generally will maintain a weighted average maturity of 40 days or less.
The fund invests in compliance with Rule 2a-7 under the Investment Company Act
of 1940.

The portfolio managers focus on securities they believe have favorable prospects
for current income consistent with the preservation of capital and liquidity.
The portfolio managers usually hold portfolio securities to maturity, but may
sell a particular security when they deem it advisable, such as when any of the
factors above materially changes.

In anticipation of or in response to adverse market conditions, for cash
management purposes or for defensive purposes, the fund may temporarily hold all
or a portion of its assets in cash or shares of affiliated money market funds.
As a result, the fund may not achieve its investment objective.

PRINCIPAL RISKS OF INVESTING IN THE FUND

An investment in the fund is not a deposit of a bank and is not insured or
guaranteed by the Federal Deposit Insurance Corporation or any other government
agency.  Although the fund seeks to preserve the value of your investment at
$1.00 per share, it is possible to lose money by investing in the fund.
Additionally, the fund's yield will vary as the short-term securities in its
portfolio mature and the proceeds are reinvested in securities with different
interest rates.

The following factors could reduce the fund's income and/or share price:

 . sharply rising interest rates;

 . downgrades of credit ratings or defaults of any of the fund's holdings; and

 . the risks generally associated with concentrating investments in the banking
  industry, such as interest rate risk, credit risk and regulatory developments
  relating to the banking and financial services industries.

If the seller of a repurchase agreement in which the fund invests defaults on
its obligation or declares bankruptcy, the fund may experience delays in selling
the securities underlying the repurchase agreement. As a result, the fund may
incur losses arising from a decline in the value of those securities, reduced
levels of income and expenses of enforcing its rights.

The value of your shares could be adversely affected if the computer systems
used by the fund's investment advisor and the fund's other service providers are
unable to distinguish the year 2000 from the year 1900.

                                       3
<PAGE>

The fund's investment advisor and independent technology consultants are working
to avoid year 2000-related problems in its systems and to obtain assurances that
other service providers are taking similar steps. Year 2000 problems may also
affect issuers in whose securities the fund invests.

                                       4
<PAGE>

PERFORMANCE INFORMATION

The bar chart and table shown below provide an indication of the risks of
investing in the fund.  The fund's past performance is not necessarily an
indication of its future performance.

ANNUAL TOTAL RETURNS

The following bar chart shows changes in the performance of the Personal
Investment Class shares from year to year.  The Personal Investment Class shares
are not subject to sales loads.


                           PERSONAL INVESTMENT CLASS
                             [GRAPH APPEARS HERE]


                       Year                  Return (%)
                       ----                  ----------
                       1992                     3.32%
                       1993                     2.68%
                       1994                     3.80%
                       1995                     5.51%
                       1996                     4.95%
                       1997                     5.10%
                       1998                     5.07%

The Personal Investment Class shares' year-to-date total return as of September
30, 1999 was 3.39%.

During the periods shown in the bar chart, the highest quarterly return was
1.38% (quarter ended June 30, 1995) and the lowest quarterly return was 0.65%
(quarter ended June 30, 1993).

                                       5
<PAGE>

PERFORMANCE TABLE

The following performance table reflects the performance of Personal Investment
Class shares over the periods indicated.

<TABLE>
<CAPTION>
=====================================================================================================
        Average Annual Total Returns
 (for the periods ended December 31, 1998)
                                                                                 Since      Inception
                                               1 Year    5 Years    10 Years   Inception      Date
- -----------------------------------------------------------------------------------------------------
<S>                                            <C>       <C>        <C>        <C>          <C>
Personal Investment Class                       5.07%     4.89%         --       4.36%       08/20/91
=====================================================================================================
</TABLE>

Personal Investment Class shares' seven-day yield on December 31, 1998 was
4.66%.  For the current seven-day yield, call (800) 877-4744.

                                       6
<PAGE>

FEE TABLE AND EXPENSE EXAMPLE

FEE TABLE

This table describes the fees and expenses that you may pay if you buy and hold
shares of the fund:

<TABLE>
<CAPTION>
                                                                      Personal Investment Class
                                                                      -------------------------
<S>                                                                             <C>
Shareholder Fees (fees paid directly from your investment)

    Maximum Sales Charge (Load) Imposed on Purchases
      (as a percentage of offering price)                                       None
    Maximum Deferred Sales Charge (Load)
      (as a percentage of original purchase price
       or redemption proceeds, whichever is less)                               None

Annual Fund Operating Expenses (expenses that are deducted
    from fund assets)

    Management Fees                                                             0.06%
    Distribution and/or Service (12b-1) Fees                                    0.75
    Other Expenses                                                              0.03
    Total Annual Fund Operating Expenses                                        0.84
    Fee Waiver(1)                                                               0.25
    Net Expenses                                                                0.59
</TABLE>
- --------------------
(1) The distributor has contractually agreed to waive 0.25% of the Rule 12b-1
    distribution plan fee.

As a result of 12b-1 fees, long-term shareholders in the fund may pay more than
the maximum permitted initial sales charge.

You should also consider the effect of any account fees charged by the financial
institution managing the account.

EXPENSE EXAMPLE

This example is intended to help you compare the costs of investing in the
Personal Investment Class of the fund with the cost of investing in other mutual
funds.

The example assumes that you invest $10,000 in the fund for the time periods
indicated and then redeem all of your shares at the end of those periods.  The
example also assumes that your investment has a 5% return each year and that the
fund's gross operating expenses remain the same.  To the extent fees are waived
or expenses are reimbursed, the expenses will be lower.  Although your actual
returns and costs may be higher or lower, based on these assumptions your costs
would be:

                                 1 Year    3 Years    5 Years     10 Years
                                 ------    -------    -------     --------

Personal Investment Class          $86       $268      $466        $1,037

                                       7
<PAGE>

FUND MANAGEMENT

THE ADVISOR

A I M Advisors, Inc. (the advisor) serves as the fund's investment advisor and
is responsible for its day-to-day management.  The advisor is located at 11
Greenway Plaza, Suite 100, Houston, Texas 77046-1173.  The advisor supervises
all aspects of the fund's operations and provides investment advisory services
to the fund, including obtaining and evaluating economic, statistical and
financial information to formulate and implement investment programs for the
fund.

The advisor has acted as an investment advisor since its organization in 1976.
Today, the advisor, together with its subsidiaries, advises or manages over 125
investment portfolios, including the fund, encompassing a broad range of
investment objectives.

ADVISOR COMPENSATION

During the fiscal year ended August 31, 1999, the advisor received compensation
of 0.06% of average daily net assets.

                                       8
<PAGE>

OTHER INFORMATION

SUITABILITY FOR INVESTORS

The Personal Investment Class of the fund is intended for use primarily by
institutional customers of banks, certain broker-dealers and other financial
institutions (institutions).  It is expected that the shares of the Personal
Investment Class may be particularly suitable investments for corporate cash
managers, municipalities or other public entities.  Individuals, corporations,
partnerships and other businesses that maintain qualified accounts at an
institution may invest in shares of the Personal Investment Class.  Each
institution will render administrative support services to its customers who are
the beneficial owners of the shares of the Personal Investment Class. Such
services include, among other things, establishment and maintenance of
shareholder accounts and records; assistance in processing purchase and
redemption transactions in shares of the Personal Investment Class; providing
periodic statements showing a client's account balance in shares of the Personal
Investment Class; distribution of fund proxy statements, annual reports and
other communications to shareholders whose accounts are serviced by the
institution; and such other services as the fund may reasonably request.
Institutions will be required to certify to the fund that they comply with
applicable state law regarding registration as broker-dealers, or that they are
exempt from such registration.

The Personal Investment Class is designed to be a convenient and economical way
to invest in an open-end diversified money market fund.  It is anticipated that
most investors will perform their own subaccounting.

Investors in the Personal Investment Class have the opportunity to receive a
somewhat higher yield than might be obtainable through direct investment in
money market instruments, and enjoy the benefits of diversification, economies
of scale and same-day liquidity.  Generally, higher interest rates can be
obtained on the purchase of very large blocks of money market instruments.  Of
course, any such relative increase in interest rates may be offset to some
extent by the operating expenses of the Personal Investment Class.

DIVIDENDS AND DISTRIBUTIONS

Dividends

The fund generally declares dividends on each business day and pays dividends
monthly.  A business day is any day on which both the Federal Reserve Bank of
New York and The Bank of New York, the fund's custodian, are open for business.

Dividends are paid on settled shares of the fund as of 4:00 p.m. Eastern time.
Generally, shareholders whose purchase orders have been received by the fund
prior to 4:00 p.m. Eastern time and shareholders whose redemption proceeds have
not been wired to them on any business day are eligible to receive dividends on
that business day.  The dividend declared on any day preceding a non-business
day of the fund will include the income accrued on such non-business day.
Dividends and distributions are paid in cash unless the shareholder has elected
to have such dividends and distributions reinvested in the form of additional
full and fractional shares at net asset value.

Capital Gains Distributions

The fund generally distributes net realized capital gains (including net short-
term capital gains), if any, annually. The fund does not expect to realize any
long-term capital gains and losses.

                                       9
<PAGE>

FINANCIAL HIGHLIGHTS

The financial highlights table is intended to help you understand the financial
performance of the Personal Investment Class.  Certain information reflects
financial results for a single fund share.

The total returns in the table represent the rate that an investor would have
earned on an investment in the fund (assuming reinvestment of all dividends and
distributions).

This information has been audited by KPMG LLP, whose report, along with the
fund's financial statements, is included in the fund's annual report, which is
available upon request.

<TABLE>
<CAPTION>
                                                                              Personal Investment Class
                                                             ---------------------------------------------------------------
                                                                                Year Ended August 31,
                                                                 1999          1998          1997         1996        1995
                                                             ---------------------------------------------------------------
<S>                                                             <C>           <C>           <C>          <C>         <C>
Net asset value, beginning of period                            $1.00         $1.00         $1.00        $1.00       $1.00
- --------------------------------------------------------     ---------------------------------------------------------------
Income from investment operations:
  Net investment income                                          0.05          0.05          0.05         0.05        0.05
- --------------------------------------------------------     ---------------------------------------------------------------
Less distributions:
    Dividends from net investment income                        (0.05)        (0.05)        (0.05)       (0.05)      (0.05)
- --------------------------------------------------------     ---------------------------------------------------------------
Net asset value, end of period                                  $1.00         $1.00         $1.00        $1.00       $1.00
- --------------------------------------------------------     ---------------------------------------------------------------
Total return                                                     4.63%         5.18%         5.01%        5.11%       5.27%
- --------------------------------------------------------     ---------------------------------------------------------------
Ratios/supplemental data:
Net assets, end of period (000s omitted)                      $87,754      $140,087       $97,215     $112,645     $99,630
- --------------------------------------------------------     ---------------------------------------------------------------
Ratio of expenses to average net assets (a)                      0.59%(b)      0.59%         0.59%        0.59%       0.59%
========================================================     ===============================================================
Ratio of net investment income to average net assets (c)         4.52%(b)      5.06%         4.89%        4.99%       5.23%
========================================================     ===============================================================
</TABLE>
(a) After fee waivers and/or expense reimbursement. Ratios of expenses to
    average net assets prior to fee waivers and/or expense reimbursements were
    0.84%, 0.84%, 0.84%, 0.89%, and 0.86% for the periods 1999-1995,
    respectively.
(b) Ratios based on average net assets of $151,714,818.
(c) After fee waivers and/or expense reimbursement. Ratios of net investment
    income to average net assets prior to fee waivers and/or expense
    reimbursements were 4.27%, 4.81%, 4.64%, 4.69%, and 4.96% for the periods
    1999-1995, respectively.

                                       10
<PAGE>

SHAREHOLDER INFORMATION

The fund currently offers six classes of shares all of which share a common
investment objective and portfolio of investments.  The six classes differ only
with respect to distribution arrangements for different categories of investors.

DISTRIBUTION AND SERVICE (12b-1) FEES

The fund has adopted a 12b-1 plan with respect to the Personal Investment Class
that allows the fund to pay distribution fees to Fund Management Company (the
distributor) for the sale and distribution of its shares and fees for services
provided to shareholders.  Because the fund pays these fees out of its assets on
an ongoing basis, over time these fees will increase the cost of your investment
and may cost you more than paying other types of sales charges.

PURCHASING SHARES

The minimum initial investment in the Personal Investment Class is $1,000.  No
minimum amount is required for subsequent investments in the fund, nor are
minimum balances required.

Purchase orders will be accepted for execution on the day the order is placed,
provided that the order is properly submitted and received by the transfer agent
prior to 4:00 p.m. Eastern time on a business day of the fund. Purchase orders
received after such time will be processed at the next day's net asset value.
You may purchase shares by submitting an Account Application to the fund's
transfer agent, A I M Fund Services, Inc. (transfer agent) at P.O. Box 4497,
Houston, Texas 77210-4497 prior to your initial purchase of shares.  You must
open a fund account through an institution in accordance with procedures
established by such institution.  A purchase order is considered received at the
time The Bank of New York receives federal funds (member bank deposits with a
Federal Reserve Bank) for the order, provided the transfer agent has received
notice of the order or at the time the order is placed, if the fund is assured
of payment.  You may obtain an Account Application from the distributor.
Subsequent purchases of shares of the funds may also be made via AIM
LINK--Registered Trademark--Remote, a personal computer application software
product.

If you propose to open a fund account with an institution, you should consult
with a representative of such institution to obtain a description of the rules
governing such an account.  A statement with regard to your investment in the
Personal Investment Class is supplied periodically, and confirmations of all
transactions for your account are provided by the institution promptly upon
request.  In addition, proxies, periodic reports and other information from the
institution with regard to your shares of the Personal Investment Class will be
sent to you.

You may place an order for the purchase of shares of the Personal Investment
Class with the institution.  The institution is responsible for the prompt
transmission of the order to the transfer agent.  The fund is normally required
to make immediate settlement in federal funds  for portfolio securities
purchased.  Accordingly, payment for shares of the Personal Investment Class
purchased by institutions on behalf of their clients must be in federal funds.
If an order to purchase shares is paid for other than in federal funds, the
order may be delayed up to two business days while the institution completes the
conversion into federal funds.

REDEEMING SHARES

You may redeem any or all of your shares at the net asset value next determined
after receipt of a redemption request in proper form by the fund.  There is no
charge for redemption.  Redemption requests with respect to shares of the
Personal Investment Class are normally made through a customer's institution.

                                       11
<PAGE>

You may request a redemption by calling the transfer agent at (800) 877-4744, or
by using AIM LINK--Registered Trademark--Remote. Payment for redeemed shares is
normally made by Federal Reserve wire to the commercial bank account designated
in your Account Application. You may also request that payment be made by check.
We use reasonable procedures to confirm that instructions communicated by
telephone are genuine and are not liable for telephone instructions that are
reasonably believed to be genuine. Such reasonable procedures may include
recordings of telephone transactions maintained for a reasonable period of time.

Payment for redemption orders received prior to 4:00 p.m. Eastern time will
normally be made on the same day. Payment for shares redeemed by mail and
payment for telephone redemptions in amounts of less than $1,000 may be made by
check mailed within seven days after receipt of the redemption request in proper
form.  The fund may make payment for telephone redemptions in excess of $1,000
by check when it is considered to be in the fund's best interest to do so.

Dividends payable up to the date of redemption on redeemed shares will normally
be paid by wire transfer on the next dividend payment date.  However, if all of
the shares in your account are redeemed, you will receive dividends payable up
to the date of redemption with the proceeds of the redemption.

THE FUND AND ITS AGENTS RESERVE THE RIGHT AT ANY TIME TO:
 . REJECT OR CANCEL ANY PART OF ANY PURCHASE ORDER;
 . MODIFY ANY TERMS OR CONDITIONS OF PURCHASE OF SHARES OF THE FUND; OR
 . WITHDRAW ALL OR ANY PART OF THE OFFERING MADE BY THIS PROSPECTUS.

PRICING OF SHARES

Determination of Net Asset Value

The price of each of the fund's shares is the fund's net asset value per share.
The fund determines the net asset value of its shares as of 4:00 p.m. Eastern
time on each day on which both the Federal Reserve Bank of New York and The Bank
of New York are open for business (business day).  The fund values portfolio
securities on the basis of amortized cost, which approximates market value.

Timing of Orders

The fund prices purchase and redemption orders at the net asset value calculated
after the transfer agent receives an order in good form.  If the transfer agent
receives a redemption request on a business day prior to 4:00 p.m. Eastern time,
the fund will normally wire redemption proceeds on that day.  If the transfer
agent receives a redemption request after 4:00 p.m. Eastern time, the redemption
will be processed at the net asset value next determined. Shareholders will
accrue dividends until the day the fund wires redemption proceeds.  The fund may
postpone the right of redemption only under unusual circumstances, as allowed by
the Securities and Exchange Commission, such as when the New York Stock Exchange
restricts or suspends trading.  The fund reserves the right to change the time
for which purchase and redemption orders must be submitted to and received by
the transfer agent for execution on the same day on any day when the primary
government securities dealers are either closed for business or close early, or
trading in money market securities is limited due to national holidays.

                                       12
<PAGE>

Taxes

Dividends and distributions received are taxable as ordinary income [or long-
term capital gains] for federal income tax purposes, whether reinvested in
additional shares or taken in cash.  Distributions are taxable at different
rates depending on the length of time the fund holds its assets.  [Different tax
rates apply to ordinary income and long-term capital gain distributions,
regardless of how long shares are held.]  Every year, information will be sent
showing the amount of dividends and distributions received from the fund during
the prior year.

[Any long-term or short-term capital gains realized from redemptions of the fund
shares will be subject to federal income tax.]

The foreign, state and local tax consequences of investing in the fund may
differ materially from the federal income tax consequences described above.
Shareholders should consult their tax advisor before investing.

                                       13
<PAGE>

                               [BACK COVER PAGE]


OBTAINING ADDITIONAL INFORMATION

More information may be obtained free of charge upon request.  The Statement of
Additional Information (SAI), a current version of which is on file with the
Securities and Exchange Commission (SEC), contains more details about the fund
and is incorporated by reference into the prospectus (is legally a part of this
prospectus).  Annual and semiannual reports to shareholders contain additional
information about the fund's investments.  The fund's annual report also
discusses the market conditions and investment strategies that significantly
affected the fund's performance during its last fiscal year.

If you have questions about this fund, another fund in The AIM Family of
Funds--Registered Trademark--or your account, or wish to obtain free copies of
the fund's current SAI or annual or semiannual reports, please contact us

BY MAIL:           A I M Fund Services, Inc.
                   P. O. Box 4497
                   Houston, TX 77210-4497

BY TELEPHONE:      (800) 877-4744

BY E-MAIL:         [email protected]

ON THE INTERNET:   http://www.aimfunds.com (prospectuses and annual and
                   semiannual reports only)

You also can review and obtain copies of the fund's SAI, reports and other
information at the SEC's Public Reference Room in Washington, DC; on the EDGAR
database on the SEC's Internet website (http://www.sec.gov); or, after paying a
duplication fee, by sending a letter to the SEC's Public Reference Section,
Washington, DC 20549-0102 or by sending an electronic mail request to
[email protected]. Please call the SEC at 1-202-942-8090 for information about
the Public Reference Room.


Prime Portfolio
SEC 1940 Act file number:  811-7892

                               [Back Cover Page]
<PAGE>

[AIM LOGO]


PRIVATE INVESTMENT CLASS

PRIME PORTFOLIO
                                                PROSPECTUS
                                                DECEMBER 17, 1999



Prime Portfolio seeks to maximize current income consistent with the
preservation of capital and the maintenance of liquidity.

This prospectus contains important information about the Private Investment
Class of the fund. Please read it before investing and keep it for future
reference.

As with all other mutual fund securities, the Securities and Exchange Commission
has not approved or disapproved these securities or determined whether the
information in this prospectus is adequate or accurate. Anyone who tells you
otherwise is committing a crime.

There can be no assurance that the fund will be able to maintain a stable net
asset value of $1.00 per share.

                                       1
<PAGE>

                               TABLE OF CONTENTS


<TABLE>
<CAPTION>
                                                                            Page
<S>                                                                         <C>
Investment Objective and Strategies.........................................   3

Principal Risks of Investing in the Fund....................................   3

Performance Information.....................................................   5
     Annual Total Returns...................................................   5
     Performance Table......................................................   6

Fee Table and Expense Example...............................................   7
     Fee Table..............................................................   7
     Expense Example........................................................   7

Fund Management.............................................................   8
     The Advisor............................................................   8
     Advisor Compensation...................................................   8

Other Information...........................................................   9
     Suitability for Investors..............................................   9
     Dividends and Distributions............................................   9

Financial Highlights........................................................  10

Shareholder Information.....................................................  11
     Distribution and Service (12b-1) Fees..................................  11
     Purchasing Shares......................................................  11
     Redeeming Shares.......................................................  11
     Pricing of Shares......................................................  12
     Taxes..................................................................  13

Obtaining Additional Information...............................  Back Cover Page
</TABLE>




The AIM Family of Funds, The AIM Family of Funds and Design (i.e., the AIM
logo), AIM and Design, AIM, AIM LINK, AIM Institutional Funds, aimfunds.com, La
Familia AIM de Fondos, La Familia AIM de Fondos and Design and Invest with
Discipline are registered service marks and AIM Bank Connection, AIM Funds, AIM
Funds and Design, AIM Internet Connect and AIM Investor are service marks of
A I M Management Group Inc.

No dealer, salesperson or any other person has been authorized to give any
information or to make any representations other than those contained in this
prospectus, and you should not rely on such other information or
representations.

                                       2
<PAGE>

INVESTMENT OBJECTIVE AND STRATEGIES

The fund's investment objective is to maximize current income consistent with
the preservation of capital and the maintenance of liquidity.

The fund attempts to meet this objective by investing only in high-quality U.S.
dollar denominated obligations with maturities of 60 days or less, including:

 . securities issued by the U.S. Government or its agencies;

 . bankers' acceptances, certificates of deposit and time deposits from banks;

 . repurchase agreements;

 . commercial paper;

 . taxable municipal securities; and

 . master notes.

The fund will generally maintain a weighted average maturity of 40 days or less.
The fund invests in compliance with Rule 2a-7 under the Investment Company Act
of 1940.

The portfolio managers focus on securities they believe have favorable prospects
for current income consistent with the preservation of capital and liquidity.
The portfolio managers usually hold portfolio securities to maturity, but may
sell a particular security when they deem it advisable, such as when any of the
factors above materially changes.

In anticipation of or in response to adverse market conditions, for cash
management purposes or for defensive purposes, the fund may temporarily hold all
or a portion of its assets in cash or shares of affiliated money market funds.
As a result, the fund may not achieve its investment objective.

PRINCIPAL RISKS OF INVESTING IN THE FUND

An investment in the fund is not a deposit of a bank and is not insured or
guaranteed by the Federal Deposit Insurance Corporation or any other government
agency. Although the fund seeks to preserve the value of your investment at
$1.00 per share, it is possible to lose money by investing in the fund.
Additionally, the fund's yield will vary as the short-term securities in its
portfolio mature and the proceeds are reinvested in securities with different
interest rates.

The following factors could reduce the fund's income and/or share price:

 . sharply rising interest rates;

 . downgrades of credit ratings or defaults of any of the fund's holdings; and

 . the risks generally associated with concentrating investments in the banking
  industry, such as interest rate risk, credit risk and regulatory
  developments relating to the banking and financial services industries.

If the seller of a repurchase agreement in which the fund invests defaults on
its obligation or declares bankruptcy, the fund may experience delays in selling
the securities underlying the repurchase agreement. As a result, the fund may
incur losses arising from a decline in the value of those securities, reduced
levels of income and expenses of enforcing its rights.

                                       3
<PAGE>

The value of your shares could be adversely affected if the computer systems
used by the fund's investment advisor and the fund's other service providers are
unable to distinguish the year 2000 from the year 1900.

The fund's investment advisor and independent technology consultants are working
to avoid year 2000-related problems in its systems and to obtain assurances that
other service providers are taking similar steps. Year 2000 problems may also
affect issuers in whose securities the fund invests.

                                       4
<PAGE>

PERFORMANCE INFORMATION

The bar chart and table shown below provide an indication of the risks of
investing in the fund. The fund's past performance is not necessarily an
indication of its future performance.

ANNUAL TOTAL RETURNS

The following bar chart shows changes in the performance of the Private
Investment Class shares from year to year. The Private Investment Class shares
are not subject to sales loads.

                           PRIVATE INVESTMENT CLASS

                             [Graph Appears Here]

                         Year              Return (%)
                        ------            ------------
                         1994                4.01%
                         1995                5.72%
                         1996                5.16%
                         1997                5.31%
                         1998                5.28%


The Private Investment Class shares' year-to-date total return as of September
30, 1999 was 3.54%.

During the periods shown in the bar chart, the highest quarterly return was
1.43% (quarter ended June 30, 1995) and the lowest quarterly return was 0.73%
(quarter ended March 31, 1994).



                                       5
<PAGE>

PERFORMANCE TABLE

The following performance table reflects the performance of Private Investment
Class shares over the periods indicated.

<TABLE>
<CAPTION>
      Average Annual Total Returns
(for the periods ended December 31, 1998)
                                                                            Since     Inception
                                             1 Year   5 Years   10 Years  Inception     Date
- -----------------------------------------------------------------------------------------------
<S>                                          <C>      <C>       <C>       <C>         <C>
Private Investment Class                     5.28%     5.10%       --       4.91%     07/08/93
- -----------------------------------------------------------------------------------------------
</TABLE>

Private Investment Class shares' seven-day yield on December 31, 1998 was 4.86%.
For the current seven-day yield, call (800) 877-7748.

                                       6
<PAGE>

FEE TABLE AND EXPENSE EXAMPLE

FEE TABLE

This table describes the fees and expenses that you may pay if you buy and hold
shares of the fund:

                                                        Private Investment Class
                                                        ------------------------
Shareholder Fees (fees paid directly from your
 investment)

  Maximum Sales Charge (Load) Imposed on Purchases
    (as a percentage of offering price)                           None
  Maximum Deferred Sales Charge (Load)
    (as a percentage of original purchase price
    or redemption proceeds, whichever is less)                    None

Annual Fund Operating Expenses (expenses that are
  deducted from fund assets)

  Management Fees                                                 0.06%
  Distribution and/or Service (12b-1) Fees                        0.50
  Other Expenses                                                  0.03
  Total Annual Fund Operating Expenses                            0.59
  Fee Waiver(1)                                                   0.20
  Net Expenses                                                    0.39
- ----------------
(1)The distributor has contractually agreed to waive 0.20% of the Rule 12b-1
   distribution plan fee.

As a result of 12b-1 fees, long-term shareholders in the fund may pay more than
the maximum permitted initial sales charge.

You should also consider the effect of any account fees charged by the financial
institution managing the account.

EXPENSE EXAMPLE

This example is intended to help you compare the costs of investing in the
Private Investment Class of the fund with the cost of investing in other mutual
funds.

The example assumes that you invest $10,000 in the fund for the time periods
indicated and then redeem all of your shares at the end of those periods. The
example also assumes that your investment has a 5% return each year and that the
fund's gross operating expenses remain the same. To the extent fees are waived
or expenses are reimbursed, the expenses will be lower. Although your actual
returns and costs may be higher or lower, based on these assumptions your costs
would be:

                          1 Year    3 Years   5 Years   10 Years
                          ------    -------   -------   --------

Private Investment Class   $60       $189      $329       $738

                                       7
<PAGE>

FUND MANAGEMENT

THE ADVISOR

A I M Advisors, Inc. (the advisor) serves as the fund's investment advisor and
is responsible for its day-to-day management. The advisor is located at 11
Greenway Plaza, Suite 100, Houston, Texas 77046-1173. The advisor supervises all
aspects of the fund's operations and provides investment advisory services to
the fund, including obtaining and evaluating economic, statistical and financial
information to formulate and implement investment programs for the fund.

The advisor has acted as an investment advisor since its organization in 1976.
Today, the advisor, together with its subsidiaries, advises or manages over 125
investment portfolios, including the fund, encompassing a broad range of
investment objectives.

ADVISOR COMPENSATION

During the fiscal year ended August 31, 1999, the advisor received compensation
of 0.06% of average daily net assets.

                                       8
<PAGE>

OTHER INFORMATION

SUITABILITY FOR INVESTORS

The Private Investment Class of the fund is intended for use primarily by
institutional customers of banks, certain broker-dealers and other financial
institutions (institutions). Individuals, corporations, partnerships and other
businesses that maintain qualified accounts at an institution may invest in
shares of the Private Investment Class. Each institution will render
administrative support services to its customers who are the beneficial owners
of the shares of the Private Investment Class. Such services include, among
other things, establishment and maintenance of shareholder accounts and records;
assistance in processing purchase and redemption transactions in shares of the
Private Investment Class; providing periodic statements showing a client's
account balance in shares of the Private Investment Class; distribution of fund
proxy statements, annual reports and other communications to shareholders whose
accounts are serviced by the institution; and such other services as the fund
may reasonably request. Institutions will be required to certify to the fund
that they comply with applicable state law regarding registration as broker-
dealers, or that they are exempt from such registration.

The Private Investment Class is designed to be a convenient and economical way
to invest in an open-end diversified money market fund. It is anticipated that
most investors will perform their own subaccounting.

Investors in the Private Investment Class have the opportunity to receive a
somewhat higher yield than might be obtainable through direct investment in
money market instruments, and enjoy the benefits of diversification, economies
of scale and same-day liquidity. Generally, higher interest rates can be
obtained on the purchase of very large blocks of money market instruments. Of
course, any such relative increase in interest rates may be offset to some
extent by the operating expenses of the Private Investment Class.

DIVIDENDS AND DISTRIBUTIONS

Dividends

The fund generally declares dividends on each business day and pays dividends
monthly. A business day is any day on which both the Federal Reserve Bank of New
York and The Bank of New York, the fund's custodian, are open for business.

Dividends are paid on settled shares of the fund as of 4:00 p.m. Eastern time.
Generally, shareholders whose purchase orders have been received by the fund
prior to 4:00 p.m. Eastern time and shareholders whose redemption proceeds have
not been wired to them on any business day are eligible to receive dividends on
that business day. The dividend declared on any day preceding a non-business day
of the fund will include the income accrued on such non-business day. Dividends
and distributions are paid in cash unless the shareholder has elected to have
such dividends and distributions reinvested in the form of additional full and
fractional shares at net asset value.

Capital Gains Distributions

The fund generally distributes net realized capital gains (including net short-
term capital gains), if any, annually. The fund does not expect to realize any
long-term capital gains and losses.

                                       9
<PAGE>

FINANCIAL HIGHLIGHTS

The financial highlights table is intended to help you understand the financial
performance of the Private Investment Class.  Certain information reflects
financial results for a single fund share.

The total returns in the table represent the rate that an investor would have
earned (or lost) on an investment in the fund (assuming reinvestment of all
dividends and distributions).

This information has been audited by KPMG LLP, whose report, along with the
fund's financial statements, is included in the fund's annual report, which is
available upon request.

<TABLE>
<CAPTION>
                                                                                Private Investment Class
                                                               -----------------------------------------------------------
                                                                                 Year Ended August 31,
                                                                   1999        1998         1997        1996        1995
                                                               -----------  ----------  -----------  ----------  ----------
<S>                                                            <C>          <C>         <C>          <C>         <C>
Net asset value, beginning of period                               $1.00       $1.00        $1.00       $1.00       $1.00
- -------------------------------------------------------------  -----------  ----------  -----------  ----------  ----------
Income from investment operations:
  Net investment income                                             0.05        0.05         0.05        0.05        0.05
- -------------------------------------------------------------  -----------  ----------  -----------  ----------  ----------
Less distributions
  Dividends from net investment income                             (0.05)      (0.05)       (0.05)      (0.05)      (0.05)
- -------------------------------------------------------------  -----------  ----------  -----------  ----------  ----------
Net asset value, end of period                                     $1.00       $1.00        $1.00       $1.00       $1.00
- -------------------------------------------------------------  -----------  ----------  -----------  ----------  ----------
Total return                                                        4.72%       5.39%        5.21%       5.32%       5.48%
- -------------------------------------------------------------  -----------  ----------  -----------  ----------  ----------
Ratios/supplemental data:
Net assets, end of period (000s omitted)                         $384,894    $294,811    $ 235,447    $209,443    $154,278
- -------------------------------------------------------------  -----------  ----------  -----------  ----------  ----------
Ratio of expenses to average net assets (a)                     0.39% (b)       0.39%        0.39%       0.39%       0.39%
- -------------------------------------------------------------  -----------  ----------  -----------  ----------  ----------
Ratio of net investment income to average net assets (c)        4.72% (b)       5.26%        5.10%       5.20%       5.50%
- -------------------------------------------------------------  -----------  ----------  -----------  ----------  ----------
</TABLE>

(a) After fee waivers and/or expense reimbursement. Ratios of expenses to
    average net assets prior to fee waivers and/or expense reimbursements were
    0.59%, 0.59%, 0.59%, 0.59% and 0.60% for the periods 1999-1995,
    respectively.
(b) Ratios based on average net assets of $385,143,051.
(c) After fee waivers and/or expense reimbursement. Ratios of net investment
    income to average net assets prior to fee waivers and/or expense
    reimbursements were 4.52%, 5.06%, 4.90%, 5.00% and 5.29% for the periods
    1999-1995, respectively.

                                      10
<PAGE>

SHAREHOLDER INFORMATION

The fund currently offers six classes of shares all of which share a common
investment objective and portfolio of investments. The six classes differ only
with respect to distribution arrangements for different categories of investors.

DISTRIBUTION AND SERVICE (12b-1) FEES

The fund has adopted a 12b-1 plan with respect to the Private Investment Class
that allows the fund to pay distribution fees to Fund Management Company (the
distributor) for the sale and distribution of its shares and fees for services
provided to shareholders. Because the fund pays these fees out of its assets on
an ongoing basis, over time these fees will increase the cost of your investment
and may cost you more than paying other types of sales charges.

PURCHASING SHARES

The minimum initial investment in the Private Investment Class is $10 thousand.
No minimum amount is required for subsequent investments in the fund, nor are
minimum balances required.

Purchase orders will be accepted for execution on the day the order is placed,
provided that the order is properly submitted and received by the transfer agent
prior to 4:00 p.m. Eastern time on a business day of the fund. Purchase orders
received after such time will be processed at the next day's net asset value.
You may purchase shares by submitting an Account Application to the fund's
transfer agent, A I M Fund Services, Inc. (transfer agent) at P.O. Box 4497,
Houston, Texas 77210-4497 prior to your initial purchase of shares. You must
open a fund account through an institution in accordance with procedures
established by such institution. A purchase order is considered received at the
time The Bank of New York receives federal funds (member bank deposits with a
Federal Reserve Bank) for the order, provided the transfer agent has received
notice of the order or at the time the order is placed, if the fund is assured
of payment. You may obtain an Account Application from the distributor.
Subsequent purchases of shares of the funds may also be made via AIM
LINK--Registered Trademark--Remote, a personal computer application software
product.

If you propose to open a fund account with an institution, you should consult
with a representative of such institution to obtain a description of the rules
governing such an account. A statement with regard to your investment in the
Private Investment Class is supplied periodically, and confirmations of all
transactions for your account are provided by the institution promptly upon
request. In addition, proxies, periodic reports and other information from the
institution with regard to your shares of the Private Investment Class will be
sent to you.

You may place an order for the purchase of shares of the Private Investment
Class with the institution. The institution is responsible for the prompt
transmission of the order to the transfer agent. The fund is normally required
to make immediate settlement in federal funds for portfolio securities
purchased. Accordingly, payment for shares of the Private Investment Class
purchased by institutions on behalf of their clients must be in federal funds.
If an order to purchase shares is paid for other than in federal funds, the
order may be delayed up to two business days while the institution completes the
conversion into federal funds.

REDEEMING SHARES

You may redeem any or all of your shares at the net asset value next determined
after receipt of a redemption request in proper form by the fund. There is no
charge for redemption. Redemption requests with respect to shares of the Private
Investment Class are normally made through a customer's institution.

                                      11
<PAGE>

You may request a redemption by calling the transfer agent at (800) 877-7748, or
by using AIM LINK--Registered Trademark--Remote. Payment for redeemed shares is
normally made by Federal Reserve wire to the commercial bank account designated
in your Account Application. You may also request that payment be made by check.
We use reasonable procedures to confirm that instructions communicated by
telephone are genuine and are not liable for telephone instructions that are
reasonably believed to be genuine. Such reasonable procedures may include
recordings of telephone transactions maintained for a reasonable period of time.

Payment for redemption orders received prior to 4:00 p.m. Eastern time will
normally be made on the same day. Payment for shares redeemed by mail and
payment for telephone redemptions in amounts of less than $1,000 may be made by
check mailed within seven days after receipt of the redemption request in proper
form. The fund may make payment for telephone redemptions in excess of $1,000 by
check when it is considered to be in the fund's best interest to do so.

Dividends payable up to the date of redemption on redeemed shares will normally
be paid by wire transfer on the next dividend payment date. However, if all of
the shares in your account are redeemed, you will receive dividends payable up
to the date of redemption with the proceeds of the redemption.

THE FUND AND ITS AGENTS RESERVE THE RIGHT AT ANY TIME TO:
 . REJECT OR CANCEL ANY PART OF ANY PURCHASE ORDER;
 . MODIFY ANY TERMS OR CONDITIONS OF PURCHASE OF SHARES OF THE FUND; OR
 . WITHDRAW ALL OR ANY PART OF THE OFFERING MADE BY THIS PROSPECTUS.

PRICING OF SHARES

Determination of Net Asset Value

The price of each of the fund's shares is the fund's net asset value per share.
The fund determines the net asset value of its shares as of 4:00 p.m. Eastern
time on each day on which both the Federal Reserve Bank of New York and The Bank
of New York are open for business (business day). The fund values portfolio
securities on the basis of amortized cost, which approximates market value.

Timing of Orders

The fund prices purchase and redemption orders at the net asset value calculated
after the transfer agent receives an order in good form. If the transfer agent
receives a redemption request on a business day prior to 4:00 p.m. Eastern time,
the fund will normally wire redemption proceeds on that day. If the transfer
agent receives a redemption request after 4:00 p.m. Eastern time, the redemption
will be processed at the net asset value next determined. Shareholders will
accrue dividends until the day the fund wires redemption proceeds. The fund may
postpone the right of redemption only under unusual circumstances, as allowed by
the Securities and Exchange Commission, such as when the New York Stock Exchange
restricts or suspends trading. The fund reserves the right to change the time
for which purchase and redemption orders must be submitted to and received by
the transfer agent for execution on the same day on any day when the primary
government securities dealers are either closed for business or close early, or
trading in money market securities is limited due to national holidays.

                                      12
<PAGE>

TAXES

Dividends and distributions received are taxable as ordinary income [or long-
term capital gains] for federal income tax purposes, whether reinvested in
additional shares or taken in cash. Distributions are taxable at different rates
depending on the length of time the fund holds its assets. [Different tax rates
apply to ordinary income and long-term capital gain, distributions regardless of
how long shares are held.] Every year, information will be sent showing the
amount of dividends and distributions received from the fund during the prior
year.

[Any long-term or short-term capital gains realized from redemptions of the fund
shares will be subject to federal income tax.]

The foreign, state and local tax consequences of investing in the fund may
differ materially from the federal income tax consequences described above.
Shareholders should consult their tax advisor before investing.

                                      13
<PAGE>

                               [BACK COVER PAGE]

OBTAINING ADDITIONAL INFORMATION

More information may be obtained free of charge upon request.  The Statement of
Additional Information (SAI), a current version of which is on file with the
Securities and Exchange Commission (SEC), contains more details about the fund
and is incorporated by reference into the prospectus (is legally a part of this
prospectus).  Annual and semiannual reports to shareholders contain additional
information about the fund's investments.  The fund's annual report also
discusses the market conditions and investment strategies that significantly
affected the fund's performance during its last fiscal year.

If you have questions about this fund, another fund in The AIM Family of
Funds--Registered Trademark-- or your account, or wish to obtain free copies of
the fund's current SAI or annual or semiannual reports, please contact us

BY MAIL:          A I M Fund Services, Inc.
                  P. O. Box 4497
                  Houston, TX 77210-4497

BY TELEPHONE:     (800) 877-7748

BY E-MAIL:        [email protected]

ON THE INTERNET:  http://www.aimfunds.com (prospectuses and annual and
                  semiannual reports only)

You also can review and obtain copies of the fund's SAI, reports and other
information at the SEC's Public Reference Room in Washington, DC; on the EDGAR
database on the SEC's Internet website (http://www.sec.gov); or, after paying a
duplication fee, by sending a letter to the SEC's Public Reference Section,
Washington, DC 20549-0102 or by sending an electronic mail request to
[email protected].  Please call the SEC at 1-202-942-8090 for information about
the Public Reference Room.


Prime Portfolio
SEC 1940 Act file number:  811-7892


                                Back Cover Page
<PAGE>

[AIM LOGO]


RESERVE CLASS

PRIME PORTFOLIO
                                                PROSPECTUS
                                                DECEMBER 17, 1999



Prime Portfolio seeks to maximize current income consistent with the
preservation of capital and the maintenance of liquidity.

This prospectus contains important information about the Reserve Class of the
fund.  Please read it before investing and keep it for future reference.

As with all other mutual fund securities, the Securities and Exchange Commission
has not approved or disapproved these securities or determined whether the
information in this prospectus is adequate or accurate. Anyone who tells you
otherwise is committing a crime.

There can be no assurance that the fund will be able to maintain a stable net
asset value of $1.00 per share.

                                       1
<PAGE>

                               TABLE OF CONTENTS
<TABLE>
<CAPTION>
                                                                            Page

<S>                                                                          <C>
Investment Objective and Strategies.......................................     3

Principal Risks of Investing in the Fund..................................     3

Performance Information...................................................     5
     Annual Total Returns.................................................     5
     Performance Table....................................................     6

Fee Table and Expense Example.............................................     7
     Fee Table............................................................     7
     Expense Example......................................................     7

Fund Management...........................................................     8
     The Advisor..........................................................     8
     Advisor Compensation.................................................     8

Other Information.........................................................     9
     Suitability for Investors............................................     9
     Dividends and Distributions..........................................     9

Financial Highlights......................................................    10

Shareholder Information...................................................    11
     Distribution and Service (12b-1) Fees................................    11
     Purchasing Shares....................................................    11
     Redeeming Shares.....................................................    11
     Pricing of Shares....................................................    12
     Taxes................................................................    13
Obtaining Additional Information ................................Back Cover Page
</TABLE>




The AIM Family of Funds, The AIM Family of Funds and Design (i.e., the AIM
logo), AIM and Design, AIM, AIM LINK, AIM Institutional Funds, aimfunds.com, La
Familia AIM de Fondos, La Familia AIM de Fondos and Design and Invest with
Discipline are registered service marks and AIM Bank Connection, AIM Funds, AIM
Funds and Design, AIM Internet Connect and AIM Investor are service marks of
A I M Management Group Inc.

No dealer, salesperson or any other person has been authorized to give any
information or to make any representations other than those contained in this
prospectus, and you should not rely on such other information or
representations.

                                       2
<PAGE>

INVESTMENT OBJECTIVE AND STRATEGIES

The fund's investment objective is to maximize current income consistent with
the preservation of capital and the maintenance of liquidity.

The fund attempts to meet this objective by investing only in high-quality U.S.
dollar denominated obligations with maturities of  60 days or less, including:

 . securities issued by the U.S. Government or its agencies;

 . bankers' acceptances, certificates of deposit and time deposits from banks;

 . repurchase agreements;

 . commercial paper;

 . taxable municipal securities; and

 . master notes.

The fund will generally maintain a weighted average maturity of 40 days or less.
The fund invests in compliance with Rule 2a-7 under the Investment Company Act
of 1940.

The portfolio managers focus on securities they believe have favorable prospects
for current income consistent with the preservation of capital and liquidity.
The portfolio managers usually hold portfolio securities to maturity, but may
sell a particular security when they deem it advisable, such as when any of the
factors above materially changes.

In anticipation of or in response to adverse market conditions, for cash
management purposes or for defensive purposes, the fund may temporarily hold
all or a portion of its assets in cash or shares of affiliated money market
funds. As a result, the fund may not achieve its investment objective.

PRINCIPAL RISKS OF INVESTING IN THE FUND

An investment in the fund is not a deposit of a bank and is not insured or
guaranteed by the Federal Deposit Insurance Corporation or any other government
agency.  Although the fund seeks to preserve the value of your investment at
$1.00 per share, it is possible to lose money by investing in the fund.
Additionally, the fund's yield will vary as the short-term securities in its
portfolio mature and the proceeds are reinvested in securities with different
interest rates.

The following factors could reduce the fund's income and/or share price:

 . sharply rising interest rates;

 . downgrades of credit ratings or defaults of any of the fund's holdings; and

 . the risks generally associated with concentrating investments in the banking
  industry, such as interest rate risk, credit risk and regulatory developments
  relating to the banking and financial services industries.

If the seller of a repurchase agreement in which the fund invests defaults on
its obligation or declares bankruptcy, the fund may experience delays in selling
the securities underlying the repurchase agreement. As a result, the fund may
incur losses arising from a decline in the value of those securities, reduced
levels of income and expenses of enforcing its rights.

The value of your shares could be adversely affected if the computer systems
used by the fund's investment advisor and the fund's other service providers are
unable to distinguish the year 2000 from the year 1900.

                                       3
<PAGE>

The fund's investment advisor and independent technology consultants are working
to avoid year 2000-related problems in its systems and to obtain assurances that
other service providers are taking similar steps. Year 2000 problems may also
affect issuers in whose securities the fund invests.

                                       4
<PAGE>

PERFORMANCE INFORMATION

The bar chart and table shown below provide an indication of the risks of
investing in the fund.  The fund's past performance is not necessarily an
indication of its future performance.

ANNUAL TOTAL RETURNS

The following bar chart shows changes in the performance of the Institutional
Class shares from year to year.  The Institutional Class shares are not subject
to sales loads.


[GRAPH APPEARS HERE]

                              INSTITUTIONAL CLASS

Year     Return (%)

1989       9.54%
1990       8.48%
1991       6.13%
1992       3.74%
1993       3.16%
1994       4.32%
1995       6.04%
1996       5.48%
1997       5.63%
1998       5.59%

The returns are those of the fund's Institutional Class shares, which are not
offered in this prospectus. Reserve Class shares would have substantially
similar annual returns because the shares are invested in the same portfolio of
securities, but would be lower to the extent that the classes have different
expenses.

The Institutional Class shares' year-to-date total return as of September 30,
1999 was 3.77%.

During the periods shown in the bar chart, Institutional Class' highest
quarterly return was 2.45% (quarter ended June 30, 1989) and the lowest
quarterly return was 0.76% (quarter ended June 30, 1993).

                                       5
<PAGE>

PERFORMANCE TABLE

The following performance table reflects the performance of Institutional Class
shares over the periods indicated.

<TABLE>
<CAPTION>
======================================================================================================
        Average Annual Total Returns
 (for the periods ended December 31, 1998)
                                                                                  Since      Inception
                                               1 Year    5 Years    10 Years    Inception      Date
- ------------------------------------------------------------------------------------------------------
<S>                                            <C>       <C>        <C>         <C>          <C>
Institutional Class                            5.59%      5.41%       5.79%        7.72%    11/10/80
- ------------------------------------------------------------------------------------------------------
Reserve Class                                    --         --          --           --     01/04/99
======================================================================================================
</TABLE>


For the current seven-day yield of Reserve Class shares, call (800) 417-8837.

                                       6
<PAGE>

FEE TABLE AND EXPENSE EXAMPLE

FEE TABLE

This table describes the fees and expenses that you may pay if you buy and hold
shares of the fund:


                                                             Reserve Class
                                                             -------------
Shareholder Fees (fees paid directly from your investment)

  Maximum Sales Charge (Load) Imposed on Purchases
    (as a percentage of offering price)                           None
  Maximum Deferred Sales Charge (Load)
    (as a percentage of original purchase price
    or redemption proceeds, whichever is less)                    None

Annual Fund Operating Expenses (expenses that are deducted
  from fund assets)

  Management Fees                                                 0.06%
  Distribution and/or Service (12b-1) Fees                        1.00
  Other Expenses                                                  0.03
  Total Annual Fund Operating Expenses                            1.09
  Fee Waiver(1)                                                   0.20
  Net Expenses                                                    0.89
- ------------
(1) The distributor has contractually agreed to waive 0.20% of the Rule 12b-1
distribution plan fee.

As a result of 12b-1 fees, long-term shareholders in the fund may pay more than
the maximum permitted initial sales charge.

You should also consider the effect of any account fees charged by the financial
institution managing the account.

EXPENSE EXAMPLE

This example is intended to help you compare the costs of investing in the
Reserve Class of  the fund with the cost of investing in other mutual funds.

The example assumes that you invest $10,000 in the fund for the time periods
indicated and then redeem all of your shares at the end of those periods.  The
example also assumes that your investment has a 5% return each year and that the
fund's gross operating expenses remain the same.  To the extent fees are waived
or expenses are reimbursed, the expenses will be lower.  Although your actual
returns and costs may be higher or lower, based on these assumptions your costs
would be:

                           1 Year    3 Years    5 Years     10 Years
                           ------    -------    -------     --------
Reserve Class               $111      $347        $601       $1,329

                                       7
<PAGE>

FUND MANAGEMENT

THE ADVISOR

A I M Advisors, Inc. (the advisor) serves as the fund's investment advisor and
is responsible for its day-to-day management.  The advisor is located at 11
Greenway Plaza, Suite 100, Houston, Texas 77046-1173.  The advisor supervises
all aspects of the fund's operations and provides investment advisory services
to the fund, including obtaining and evaluating economic, statistical and
financial information to formulate and implement investment programs for the
fund.

The advisor has acted as an investment advisor since its organization in 1976.
Today, the advisor, together with its subsidiaries, advises or manages over 125
investment portfolios, including the fund, encompassing a broad range of
investment objectives.

ADVISOR COMPENSATION

During the fiscal year ended August 31, 1999, the advisor received compensation
of 0.06% of average daily net assets.

                                       8
<PAGE>

OTHER INFORMATION

SUITABILITY FOR INVESTORS

The Reserve Class of the fund is intended for use primarily by institutional
customers of banks, certain broker-dealers and other financial institutions
(institutions).  Individuals, corporations, partnerships and other businesses
that maintain qualified accounts at an institution may invest in shares of the
Reserve Class.  Each institution will render administrative support services to
its customers who are the beneficial owners of the shares of the Reserve Class.
Such services include, among other things, establishment and maintenance of
shareholder accounts and records; assistance in processing purchase and
redemption transactions in shares of the Reserve Class; providing periodic
statements showing a client's account balance in shares of the Reserve Class;
distribution of fund proxy statements, annual reports and other communications
to shareholders whose accounts are serviced by the institution; and such other
services as the fund may reasonably request.  Institutions will be required to
certify to the fund that they comply with applicable state law regarding
registration as broker-dealers, or that they are exempt from such registration.

The Reserve Class is designed to be a convenient and economical way to invest in
an open-end diversified money market fund.  It is anticipated that most
investors will perform their own subaccounting.

Investors in the Reserve Class have the opportunity to receive a somewhat higher
yield than might be obtainable through direct investment in money market
instruments, and enjoy the benefits of diversification, economies of scale and
same-day liquidity.  Generally, higher interest rates can be obtained on the
purchase of very large blocks of money market instruments.  Of course, any such
relative increase in interest rates may be offset to some extent by the
operating expenses of the Reserve Class.

DIVIDENDS AND DISTRIBUTIONS

Dividends

The fund generally declares dividends on each business day and pays dividends
monthly.  A business day is any day on which both the Federal Reserve Bank of
New York and The Bank of New York, the fund's custodian, are open for business.

Dividends are paid on settled shares of the fund as of 4:00 p.m. Eastern time.
Generally, shareholders whose purchase orders have been received by the fund
prior to 4:00 p.m. Eastern time and shareholders whose redemption proceeds have
not been wired to them on any business day are eligible to receive dividends on
that business day.  The dividend declared on any day preceding a non-business
day of the fund will include the income accrued on such non-business day.
Dividends and distributions are paid in cash unless the shareholder has elected
to have such dividends and distributions reinvested in the form of additional
full and fractional shares at net asset value.

Capital Gains Distributions

The fund generally distributes net realized capital gains (including net short-
term capital gains), if any, annually. The fund does not expect to realize any
long-term capital gains and losses.

                                       9
<PAGE>

FINANCIAL HIGHLIGHTS

The financial highlights table is intended to help you understand the financial
performance of the Reserve Class. Certain information reflects financial results
for a single fund share.

The total returns in the table represent the rate that an investor would have
earned (or lost) on an investment in the fund (assuming reinvestment of all
dividends and distributions).

This information has been audited by KPMG LLP, whose report, along with the
fund's financial statements, is included in the fund's annual report, which is
available upon request.

<TABLE>
<CAPTION>
                                                             Reserve Class
                                                          -------------------
                                                             For the Period
                                                               January 4,
                                                                 through
                                                               August 31,
                                                                  1999
                                                          -------------------
<S>                                                       <C>
Net asset value, beginning of period                           $   1.00
- -------------------------------------------------------   -------------------
Income from investment operations:
  Net investment income                                            0.03
- -------------------------------------------------------   -------------------
  Less distributions:
    Dividends from net investment income                          (0.03)
- -------------------------------------------------------   -------------------
Net asset value, end of period                                 $   1.00
- -------------------------------------------------------   -------------------
Total return (a)                                                   4.21%
- -------------------------------------------------------   -------------------
Ratios/supplemental data:
Net assets, end of period (000s omitted)                       $121,783
- -------------------------------------------------------   -------------------
Ratio of expenses to average net assets (b)                        0.89%(c)
- -------------------------------------------------------   -------------------
Ratio of net investment income to average net assets (d)           4.22%(c)
- -------------------------------------------------------   -------------------
</TABLE>
(a) No annualized for periods less than one year.
(b) After fee waivers and/or expense reimbursements. Ratios of expenses to
    average net assets prior to fee waivers and/or expense reimbursements was
    1.09% (annualized).
(c) Ratios are annualized and based on average net assets of $42,559,418
(d) After fee waivers and/or expense reimbursements. Ratio of net investment to
    average net assets prior to fee waivers and/or expense reimbursement was
    4.02% (annualized).

                                       10
<PAGE>

SHAREHOLDER INFORMATION

The fund currently offers six classes of shares all of which share a common
investment objective and portfolio of investments.  The six classes differ only
with respect to distribution arrangements for different categories of investors.

DISTRIBUTION AND SERVICE (12b-1) FEES

The fund has adopted a 12b-1 plan with respect to the Reserve Class that allows
the fund to pay distribution fees to Fund Management Company (the distributor)
for the sale and distribution of its shares and fees for services provided to
shareholders.  Because the fund pays these fees out of its assets on an ongoing
basis, over time these fees will increase the cost of your investment and may
cost you more than paying other types of sales charges.

PURCHASING SHARES

The minimum initial investment in the Reserve Class is $1,000.  No minimum
amount is required for subsequent investments in the fund, nor are minimum
balances required.

Purchase orders will be accepted for execution on the day the order is placed,
provided that the order is properly submitted and received by the transfer agent
prior to 4:00 p.m. Eastern time on a business day of the fund. Purchase orders
received after such time will be processed at the next day's net asset value.
You may purchase shares by submitting an Account Application to the fund's
transfer agent, A I M Fund Services, Inc. (transfer agent) at P.O. Box 4497,
Houston, Texas 77210-4497 prior to your initial purchase of shares.  You must
open a fund account through an institution in accordance with procedures
established by such institution.  A purchase order is considered received at the
time The Bank of New York receives federal funds (member bank deposits with a
Federal Reserve Bank) for the order, provided the transfer agent has received
notice of the order or at the time the order is placed, if the fund is assured
of payment.  You may obtain an Account Application from the distributor.
Subsequent purchases of shares of the funds may also be made via AIM
LINK--Registered Trademark--Remote, a personal computer application software
product.

If you propose to open a fund account with an institution, you should consult
with a representative of such institution to obtain a description of the rules
governing such an account.  A statement with regard to your investment in the
Reserve Class is supplied periodically, and confirmations of all transactions
for your account are provided by the institution promptly upon request.  In
addition, proxies, periodic reports and other information from the institution
with regard to your shares of the Reserve Class will be sent to you.

You may place an order for the purchase of shares of the Reserve Class with the
institution.  The institution is responsible for the prompt transmission of the
order to the transfer agent.  The fund is normally required to make immediate
settlement in federal funds for portfolio securities purchased.  Accordingly,
payment for shares of the Reserve Class purchased by institutions on behalf of
their clients must be in federal funds.  If an order to purchase shares is paid
for other than in federal funds, the order may be delayed up to two business
days while the institution completes the conversion into federal funds.

REDEEMING SHARES

You may redeem any or all of your shares at the net asset value next determined
after receipt of a redemption request in proper form by the fund.  There is no
charge for redemption.  Redemption requests with respect to shares of the
Reserve Class are normally made through a customer's institution.

You may request a redemption by calling the transfer agent at (800) 417-8837, or
by using AIM LINK--Registered Trademark--Remote. Payment for redeemed shares is
normally made by Federal Reserve wire to the commercial bank

                                       11
<PAGE>

account designated in your Account Application. You may also request that
payment be made by check. We use reasonable procedures to confirm that
instructions communicated by telephone are genuine and are not liable for
telephone instructions that are reasonably believed to be genuine. Such
reasonable procedures may include recordings of telephone transactions
maintained for a reasonable period of time.

Payment for redemption orders received prior to 4:00 p.m. Eastern time will
normally be made on the same day. Payment for shares redeemed by mail and
payment for telephone redemptions in amounts of less than $1,000 may be made by
check mailed within seven days after receipt of the redemption request in proper
form.  The fund may make payment for telephone redemptions in excess of $1,000
by check when it is considered to be in the fund's best interest to do so.

Dividends payable up to the date of redemption on redeemed shares will normally
be paid by wire transfer on the next dividend payment date.  However, if all of
the shares in your account are redeemed, you will receive dividends payable up
to the date of redemption with the proceeds of the redemption.

THE FUND AND ITS AGENTS RESERVE THE RIGHT AT ANY TIME TO:
 . REJECT OR CANCEL ANY PART OF ANY PURCHASE ORDER;
 . MODIFY ANY TERMS OR CONDITIONS OF PURCHASE OF SHARES OF THE FUND; OR
 . WITHDRAW ALL OR ANY PART OF THE OFFERING MADE BY THIS PROSPECTUS.

PRICING OF SHARES

Determination of Net Asset Value

The price of each of the fund's shares is the fund's net asset value per share.
The fund determines the net asset value of its shares as of 4:00 p.m. Eastern
time on each day on which both the Federal Reserve Bank of New York and The Bank
of New York are open for business (business day).  The fund values portfolio
securities on the basis of amortized cost, which approximates market value.

Timing of Orders

The fund prices purchase and redemption orders at the net asset value calculated
after the transfer agent receives an order in good form.  If the transfer agent
receives a redemption request on a business day prior to 4:00 p.m. Eastern time,
the fund will normally wire redemption proceeds on that day.  If the transfer
agent receives a redemption request after 4:00 p.m. Eastern time, the redemption
will be processed at the net asset value next determined. Shareholders will
accrue dividends until the day the fund wires redemption proceeds.  The fund may
postpone the right of redemption only under unusual circumstances, as allowed by
the Securities and Exchange Commission, such as when the New York Stock Exchange
restricts or suspends trading.  The fund reserves the right to change the time
for which purchase and redemption orders must be submitted to and received by
the transfer agent for execution on the same day on any day when the primary
government securities dealers are either closed for business or close early, or
trading in money market securities is limited due to national holidays.

                                       12
<PAGE>

TAXES

Dividends and distributions received are taxable as ordinary income [or long-
term capital gains] for federal income tax purposes, whether reinvested in
additional shares or taken in cash.  Distributions are taxable at different
rates depending on the length of time the fund holds its assets.  [Different tax
rates apply to ordinary income and long-term capital gain, distributions
regardless of how long shares are held.]  Every year, information will be sent
showing the amount of dividends and distributions received from the fund during
the prior year.

[Any long-term or short-term capital gains realized from redemptions of the fund
shares will be subject to federal income tax.]

The foreign, state and local tax consequences of investing in the fund may
differ materially from the federal income tax consequences described above.
Shareholders should consult their tax advisor before investing.

                                       13
<PAGE>

                               [BACK COVER PAGE]

OBTAINING ADDITIONAL INFORMATION

More information may be obtained free of charge upon request.  The Statement of
Additional Information (SAI), a current version of which is on file with the
Securities and Exchange Commission (SEC), contains more details about the fund
and is incorporated by reference into the prospectus (is legally a part of this
prospectus).  Annual and semiannual reports to shareholders contain additional
information about the fund's investments.  The fund's annual report also
discusses the market conditions and investment strategies that significantly
affected the fund's performance during its last fiscal year.

If you have questions about this fund, another fund in The AIM Family of
Funds--Registered Trademark--or your account, or wish to obtain free copies of
the fund's current SAI or annual or semiannual reports, please contact us

BY MAIL:         A I M Fund Services, Inc.
                 P. O. Box 4497
                 Houston, TX 77210-4497

BY TELEPHONE:    (800) 417-8837

BY E-MAIL:       [email protected]

ON THE INTERNET: http://www.aimfunds.com (prospectuses and annual and
                 semiannual reports only)

You also can review and obtain copies of the fund's SAI, reports and other
information at the SEC's Public Reference Room in Washington, DC; on the EDGAR
database on the SEC's Internet website (http://www.sec.gov); or, after paying a
duplication fee, by sending a letter to the SEC's Public Reference Section,
Washington, DC 20549-0102 or by sending an electronic mail request to
[email protected]. Please call the SEC at 1-202-942-8090 for information about
the Public Reference Room.


Prime Portfolio
SEC 1940 Act file number:  811-7892


                                Back Cover Page
<PAGE>

[AIM LOGO]

RESOURCE CLASS

PRIME PORTFOLIO

                                                               PROSPECTUS
                                                               DECEMBER 17, 1999



Prime Portfolio seeks to maximize current income consistent with the
preservation of capital and the maintenance of liquidity.

This prospectus contains important information about the Resource Class of the
fund. Please read it before investing and keep it for future reference.

As with all other mutual fund securities, the Securities and Exchange Commission
has not approved or disapproved these securities or determined whether the
information in this prospectus is adequate or accurate. Anyone who tells you
otherwise is committing a crime.

There can be no assurance that the fund will be able to maintain a stable net
asset value of $1.00 per share.

                                       1

<PAGE>

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                       Page
<S>                                                                    <C>
Investment Objective and Strategies.............................         3

Principal Risks of Investing in the Fund........................         3

Performance Information.........................................         5
     Annual Total Returns.......................................         5
     Performance Table..........................................         6

Fee Table and Expense Example...................................         7
     Fee Table..................................................         7
     Expense Example............................................         7

Fund Management.................................................         8
     The Advisor................................................         8
     Advisor Compensation.......................................         8

Other Information...............................................         9
     Suitability for Investors..................................         9
     Dividends and Distributions................................         9

Financial Highlights............................................        10

Shareholder Information.........................................        11
     Distribution and Service (12b-1) Fees......................        11
     Purchasing Shares..........................................        11
     Redeeming Shares...........................................        11
     Pricing of Shares..........................................        12
     Taxes......................................................        13

Obtaining Additional Information................................ Back Cover Page
</TABLE>


The AIM Family of Funds, The AIM Family of Funds and Design (i.e., the AIM
logo), AIM and Design, AIM, AIM LINK, AIM Institutional Funds, aimfunds.com,
La Familia AIM de Fondos, La Familia AIM de Fondos and Design and Invest with
Discipline are registered service marks and AIM Bank Connection, AIM Funds, AIM
Funds and Design, AIM Internet Connect and AIM Investor are service marks of
A I M Management Group Inc.

No dealer, salesperson or any other person has been authorized to give any
information or to make any representations other than those contained in this
prospectus, and you should not rely on such other information or
representations.

                                       2

<PAGE>

INVESTMENT OBJECTIVE AND STRATEGIES

The fund's investment objective is to maximize current income consistent with
the preservation of capital and the maintenance of liquidity.

The fund attempts to meet this objective by investing only in high-quality U.S.
dollar denominated obligations with maturities of 60 days or less, including:

 . securities issued by the U.S. Government or its agencies;

 . bankers' acceptances, certificates of deposit and time deposits from banks;

 . repurchase agreements;

 . commercial paper;

 . taxable municipal securities; and

 . master notes.

The fund will generally maintain a weighted average maturity of 40 days or less.
The fund invests in compliance with Rule 2a-7 under the Investment Company Act
of 1940.

The portfolio managers focus on securities they believe have favorable prospects
for current income consistent with the preservation of capital and liquidity.
The portfolio managers usually hold portfolio securities to maturity, but may
sell a particular security when they deem it advisable, such as when any of the
factors above materially changes.

In anticipation of or in response to adverse market conditions, for cash
management purposes or for defensive purposes, the fund may temporarily hold all
or a portion of its assets in cash or shares of affiliated money market funds.
As a result, the fund may not achieve its investment objective.

PRINCIPAL RISKS OF INVESTING IN THE FUND

An investment in the fund is not a deposit of a bank and is not insured or
guaranteed by the Federal Deposit Insurance Corporation or any other government
agency. Although the fund seeks to preserve the value of your investment at
$1.00 per share, it is possible to lose money by investing in the fund.
Additionally, the fund's yield will vary as the short-term securities in its
portfolio mature and the proceeds are reinvested in securities with different
interest rates.

The following factors could reduce the fund's income and/or share price:

 . sharply rising interest rates;

 . downgrades of credit ratings or defaults of any of the fund's holdings; and

 . the risks generally associated with concentrating investments in the banking
  industry, such as interest rate risk, credit risk and regulatory developments
  relating to the banking and financial services industries.

If the seller of a repurchase agreement in which the fund invests defaults on
its obligation or declares bankruptcy, the fund may experience delays in selling
the securities underlying the repurchase agreement. As a result, the fund may
incur losses arising from a decline in the value of those securities, reduced
levels of income and expenses of enforcing its rights.

The value of your shares could be adversely affected if the computer systems
used by the fund's investment advisor and the fund's other service providers are
unable to distinguish the year 2000 from the year 1900.

                                       3

<PAGE>

The fund's investment advisor and independent technology consultants are working
to avoid year 2000-related problems in its systems and to obtain assurances that
other service providers are taking similar steps. Year 2000 problems may also
affect issuers in whose securities the fund invests.

                                       4

<PAGE>

PERFORMANCE INFORMATION

The bar chart and table shown below provide an indication of the risks of
investing in the fund. The fund's past performance is not necessarily an
indication of its future performance.

ANNUAL TOTAL RETURNS

The following bar chart shows changes in the performance of the Resource Class
shares from year to year. The Resource Class shares are not subject to sales
loads.

                                RESOURCE CLASS

                             [GRAPH APPEARS HERE]

<TABLE>
<CAPTION>
YEAR    RETURN (%)
<S>     <C>
1997       5.46%
1998       5.43%
</TABLE>

The Resource Class shares' year-to-date total return as of September 30, 1999
was 3.65%.

During the periods shown in the bar chart, the highest quarterly return was
1.38% (quarter ended December 31, 1997) and the lowest quarterly return was
1.27% (quarter ended December 31, 1998).

                                       5

<PAGE>

PERFORMANCE TABLE

The following performance table reflects the performance of Resource Class
shares over the periods indicated.

<TABLE>
<CAPTION>
===================================================================================================
      Average Annual Total Returns                                              Since      Inception
(for the periods ended December 31, 1998)    1 Year    5 Years    10 Years    Inception       Date
- ----------------------------------------------------------------------------------------------------
<S>                                          <C>       <C>        <C>         <C>          <C>
Resource Class                                5.43%       --         --         5.40%      01/16/96
===================================================================================================
</TABLE>

Resource Class shares' seven-day yield on December 31, 1998 was 5.00%. For the
current seven-day yield, call (800) 825-6858.

                                       6

<PAGE>

FEE TABLE AND EXPENSE EXAMPLE

FEE TABLE

This table describes the fees and expenses that you may pay if you buy and hold
shares of the fund:

<TABLE>
<CAPTION>
                                                            Resource Class
                                                            --------------
<S>                                                             <C>
Shareholder Fees (fees paid directly from your investment)

     Maximum Sales Charge (Load) Imposed on Purchases
     (as a percentage of offering price)                         None

     Maximum Deferred Sales Charge (Load)
     (as a percentage of original purchase price
     or redemption proceeds, whichever is less)                  None

Annual Fund Operating Expenses (expenses that are deducted
     from fund assets)

     Management Fees                                             0.06%
     Distribution and/or Service (12b-1) Fees                    0.20
     Other Expenses                                              0.03
     Total Annual Fund Operating Expenses                        0.29
     Fee Waiver(1)                                               0.04
     Net Expenses                                                0.25
</TABLE>
- ------------------
(1) The distributor has contractually agreed to waive 0.04% of the Rule 12b-1
distribution plan fee.

You should also consider the effect of any account fees charged by the financial
institution managing the account.

EXPENSE EXAMPLE

This example is intended to help you compare the costs of investing in the
Resource Class of  the fund with the cost of investing in other mutual funds.

The example assumes that you invest $10,000 in the fund for the time periods
indicated and then redeem all of your shares at the end of those periods. The
example also assumes that your investment has a 5% return each year and that the
fund's gross operating expenses remain the same. To the extent fees are waived
or expenses are reimbursed, the expenses will be lower. Although your actual
returns and costs may be higher or lower, based on these assumptions your costs
would be:

                       1 Year    3 Years   5 Years   10 Years
                       ------    -------   -------   --------

Resource Class           $30       $93      $163       $368

                                       7
<PAGE>

FUND MANAGEMENT

THE ADVISOR

A I M Advisors, Inc. (the advisor) serves as the fund's investment advisor and
is responsible for its day-to-day management. The advisor is located at 11
Greenway Plaza, Suite 100, Houston, Texas 77046-1173. The advisor supervises all
aspects of the fund's operations and provides investment advisory services to
the fund, including obtaining and evaluating economic, statistical and financial
information to formulate and implement investment programs for the fund.

The advisor has acted as an investment advisor since its organization in 1976.
Today, the advisor, together with its subsidiaries, advises or manages over 125
investment portfolios, including the fund, encompassing a broad range of
investment objectives.

ADVISOR COMPENSATION

During the fiscal year ended August 31, 1999, the advisor received compensation
of 0.06% of average daily net assets.

                                       8
<PAGE>

OTHER INFORMATION

SUITABILITY FOR INVESTORS

The Resource Class of the fund is intended for use primarily by institutional
customers of banks, certain broker-dealers and other financial institutions
(institutions). It is expected that the shares of the Resource Class may be
particularly suitable investments for corporate cash managers, municipalities or
other public entities. Individuals, corporations, partnerships and other
businesses that maintain qualified accounts at an institution may invest in
shares of the Resource Class. Each institution will render administrative
support services to its customers who are the beneficial owners of the shares of
the Resource Class. Such services include, among other things, establishment and
maintenance of shareholder accounts and records; assistance in processing
purchase and redemption transactions in shares of the Resource Class; providing
periodic statements showing a client's account balance in shares of the Resource
Class; distribution of fund proxy statements, annual reports and other
communications to shareholders whose accounts are serviced by the institution;
and such other services as the fund may reasonably request. Institutions will be
required to certify to the fund that they comply with applicable state law
regarding registration as broker-dealers, or that they are exempt from such
registration.

The Resource Class is designed to be a convenient and economical way to invest
in an open-end diversified money market fund. It is anticipated that most
investors will perform their own subaccounting.

Investors in the Resource Class have the opportunity to receive a somewhat
higher yield than might be obtainable through direct investment in money market
instruments, and enjoy the benefits of diversification, economies of scale and
same-day liquidity. Generally, higher interest rates can be obtained on the
purchase of very large blocks of money market instruments. Of course, any such
relative increase in interest rates may be offset to some extent by the
operating expenses of the Resource Class.

DIVIDENDS AND DISTRIBUTIONS

Dividends

The fund generally declares dividends on each business day and pays dividends
monthly. A business day is any day on which both the Federal Reserve Bank of New
York and The Bank of New York, the fund's custodian, are open for business.

Dividends are paid on settled shares of the fund as of 4:00 p.m. Eastern time.
Generally, shareholders whose purchase orders have been received by the fund
prior to 4:00 p.m. Eastern time and shareholders whose redemption proceeds have
not been wired to them on any business day are eligible to receive dividends on
that business day. The dividend declared on any day preceding a non-business day
of the fund will include the income accrued on such non-business day. Dividends
and distributions are paid in cash unless the shareholder has elected to have
such dividends and distributions reinvested in the form of additional full and
fractional shares at net asset value.

Capital Gains Distributions

The fund generally distributes net realized capital gains (including net short-
term capital gains), if any, annually. The fund does not expect to realize any
long-term capital gains and losses.

                                       9
<PAGE>

FINANCIAL HIGHLIGHTS

The financial highlights table is intended to help you understand the financial
performance of the Resource Class. Certain information reflects financial
results for a single fund share.

The total returns in the table represent the rate that an investor would have
earned (or lost) on an investment in the fund (assuming reinvestment of all
dividends and distributions).

This information has been audited by KPMG LLP, whose report, along with the
fund's financial statements, is included in the fund's annual report, which is
available upon request.

<TABLE>
<CAPTION>
                                                                                   Resource Class
                                                               ----------------------------------------------------
                                                                                                      For the Period
                                                                                                     January 16, 1996
                                                                                                         through
                                                                        Year Ended August 31,           August 31,
                                                                   1999        1998         1997           1996
                                                               -----------  ----------  -----------  ----------------
<S>                                                            <C>          <C>         <C>           <C>
Net asset value, beginning of period                              $1.00       $1.00        $1.00          $1.00
- -------------------------------------------------------------  -----------  ----------  -----------  ----------------
Income from investment operations:
  Net investment income                                           0.05         0.05        0.05            0.03
- -------------------------------------------------------------  -----------  ----------  -----------  ----------------
Less distributions
  Dividends from net investment income                           (0.05)       (0.05)      (0.05)          (0.03)
- -------------------------------------------------------------  -----------  ----------  -----------  ----------------
Net asset value, end of period                                    $1.00       $1.00        $1.00          $1.00
- -------------------------------------------------------------  -----------  ----------  -----------  ----------------
Total return                                                      4.99%       5.54%        5.36%          3.28%
- -------------------------------------------------------------  -----------  ----------  -----------  ----------------
Ratios/supplemental data:
Net assets, end of period (000s omitted)                        $665,939     $698,380    $161,701        $58,012
- -------------------------------------------------------------  -----------  ----------  -----------  ----------------
Ratio of expenses to average net assets (a)                     0.25% (b)     0.25%        0.25%        0.25% (c)
- -------------------------------------------------------------  -----------  ----------  -----------  ----------------
Ratio of net investment income to average net assets (d)        4.86% (b)     5.40%        5.25%        5.18% (c)
- -------------------------------------------------------------  -----------  ----------  -----------  ----------------
</TABLE>
(a) After fee waivers and/or expense reimbursement. Ratios of expenses to
    average net assets prior to fee waivers and/or expense reimbursements were
    0.29%, 0.29%, 0.29% and 0.29% (annualized) for the periods 1999-1996,
    respectively.
(b) Ratios based on average net assets of $587,668,917.
(c) Annualized.
(d) After fee waivers and/or expense reimbursement. Ratios of net investment
    income to average net assets prior to fee waivers and/or expense
    reimbursements were 4.82%, 5.36%, 5.21% and 5.14% (annualized) for
    the periods 1999-1996, respectively.

                                       10
<PAGE>

SHAREHOLDER INFORMATION

The fund currently offers six classes of shares all of which share a common
investment objective and portfolio of investments. The six classes differ only
with respect to distribution arrangements for different categories of investors.

DISTRIBUTION AND SERVICE (12b-1) FEES

The fund has adopted a 12b-1 plan with respect to the Resource Class that allows
the fund to pay distribution fees to Fund Management Company (the distributor)
for the sale and distribution of its shares and fees for services provided to
shareholders. Because the fund pays these fees out of its assets on an ongoing
basis, over time these fees will increase the cost of your investment and may
cost you more than paying other types of sales charges.

PURCHASING SHARES

The minimum initial investment in the Resource Class is $10,000. No minimum
amount is required for subsequent investments in the fund, nor are minimum
balances required.

Purchase orders will be accepted for execution on the day the order is placed,
provided that the order is properly submitted and received by the transfer agent
prior to 4:00 p.m. Eastern time on a business day of the fund. Purchase orders
received after such time will be processed at the next day's net asset value.
You may purchase shares by submitting an Account Application to the fund's
transfer agent, A I M Fund Services, Inc. (transfer agent) at P.O. Box 4497,
Houston, Texas 77210-4497 prior to your initial purchase of shares. You must
open a fund account through an institution in accordance with procedures
established by such institution. A purchase order is considered received at the
time The Bank of New York receives federal funds (member bank deposits with a
Federal Reserve Bank) for the order, provided the transfer agent has received
notice of the order or at the time the order is placed, if the fund is assured
of payment. You may obtain an Account Application from the distributor.
Subsequent purchases of shares of the funds may also be made via AIM
LINK--Registered Trademark--Remote, a personal computer application software
product.

If you propose to open a fund account with an institution, you should consult
with a representative of such institution to obtain a description of the rules
governing such an account. A statement with regard to your investment in the
Resource Class is supplied periodically, and confirmations of all transactions
for your account are provided by the institution promptly upon request. In
addition, proxies, periodic reports and other information from the institution
with regard to your shares of the Resource Class will be sent to you.

You may place an order for the purchase of shares of the Resource Class with the
institution. The institution is responsible for the prompt transmission of the
order to the transfer agent. The fund is normally required to make immediate
settlement in federal funds for portfolio securities purchased. Accordingly,
payment for shares of the Resource Class purchased by institutions on behalf of
their clients must be in federal funds. If an order to purchase shares is paid
for other than in federal funds, the order may be delayed up to two business
days while the institution completes the conversion into federal funds.

REDEEMING SHARES

You may redeem any or all of your shares at the net asset value next determined
after receipt of a redemption request in proper form by the fund. There is no
charge for redemption. Redemption requests with respect to shares of the
Resource Class are normally made through a customer's institution.

                                      11

<PAGE>

You may request a redemption by calling the transfer agent at (800) 825-6858, or
by using AIM LINK--Registered Trademark--Remote. Payment for redeemed shares is
normally made by Federal Reserve wire to the commercial bank account designated
in your Account Application. You may also request that payment be made by check.
We use reasonable procedures to confirm that instructions communicated by
telephone are genuine and are not liable for telephone instructions that are
reasonably believed to be genuine. Such reasonable procedures may include
recordings of telephone transactions maintained for a reasonable period of time.

Payment for redemption orders received prior to 4:00 p.m. Eastern time will
normally be made on the same day. Payment for shares redeemed by mail and
payment for telephone redemptions in amounts of less than $1,000 may be made by
check mailed within seven days after receipt of the redemption request in proper
form. The fund may make payment for telephone redemptions in excess of $1,000 by
check when it is considered to be in the fund's best interest to do so.

Dividends payable up to the date of redemption on redeemed shares will normally
be paid by wire transfer on the next dividend payment date. However, if all of
the shares in your account are redeemed, you will receive dividends payable up
to the date of redemption with the proceeds of the redemption.

THE FUND AND ITS AGENTS RESERVE THE RIGHT AT ANY TIME TO:
 . REJECT OR CANCEL ANY PART OF ANY PURCHASE ORDER;
 . MODIFY ANY TERMS OR CONDITIONS OF PURCHASE OF SHARES OF THE FUND; OR
 . WITHDRAW ALL OR ANY PART OF THE OFFERING MADE BY THIS PROSPECTUS.

PRICING OF SHARES

Determination of Net Asset Value

The price of each of the fund's shares is the fund's net asset value per share.
The fund determines the net asset value of its shares as of 4:00 p.m. Eastern
time on each day on which both the Federal Reserve Bank of New York and The Bank
of New York are open for business (business day). The fund values portfolio
securities on the basis of amortized cost, which approximates market value.

Timing of Orders

The fund prices purchase and redemption orders at the net asset value calculated
after the transfer agent receives an order in good form. If the transfer agent
receives a redemption request on a business day prior to 4:00 p.m. Eastern time,
the fund will normally wire redemption proceeds on that day. If the transfer
agent receives a redemption request after 4:00 p.m. Eastern time, the redemption
will be processed at the net asset value next determined. Shareholders will
accrue dividends until the day the fund wires redemption proceeds. The fund may
postpone the right of redemption only under unusual circumstances, as allowed by
the Securities and Exchange Commission, such as when the New York Stock Exchange
restricts or suspends trading. The fund reserves the right to change the time
for which purchase and redemption orders must be submitted to and received by
the transfer agent for execution on the same day on any day when the primary
government securities dealers are either closed for business or close early, or
trading in money market securities is limited due to national holidays.

                                      12

<PAGE>

TAXES

Dividends and distributions received are taxable as ordinary income [or long-
term capital gains] for federal income tax purposes, whether reinvested in
additional shares or taken in cash. Distributions are taxable at different rates
depending on the length of time the fund holds its assets. [Different tax rates
apply to ordinary income and long-term capital gain distributions regardless of
how long shares are held.] Every year, information will be sent showing the
amount of dividends and distributions received from the fund during the prior
year.

[Any long-term or short-term capital gains realized from redemptions of the fund
shares will be subject to federal income tax.]

The foreign, state and local tax consequences of investing in the fund may
differ materially from the federal income tax consequences described above.
Shareholders should consult their tax advisor before investing.

                                      13

<PAGE>

                               [BACK COVER PAGE]

OBTAINING ADDITIONAL INFORMATION

More information may be obtained free of charge upon request. The Statement of
Additional Information (SAI), a current version of which is on file with the
Securities and Exchange Commission (SEC), contains more details about the fund
and is incorporated by reference into the prospectus (is legally a part of this
prospectus). Annual and semiannual reports to shareholders contain additional
information about the fund's investments. The fund's annual report also
discusses the market conditions and investment strategies that significantly
affected the fund's performance during its last fiscal year.

If you have questions about this fund, another fund in The AIM Family of
Funds--Registered Trademark--or your account, or wish to obtain free copies
of the fund's current SAI or annual or semiannual reports, please contact us

BY MAIL:           A I M Fund Services, Inc.
                   P. O. Box 4497
                   Houston, TX 77210-4497

BY TELEPHONE:      (800) 825-6858

BY E-MAIL:         [email protected]

ON THE INTERNET:   http://www.aimfunds.com (prospectuses and annual and
                   semiannual reports only)

You also can review and obtain copies of the fund's SAI, reports and other
information at the SEC's Public Reference Room in Washington, DC; on the EDGAR
database on the SEC's Internet website (http://www.sec.gov); or, after paying a
duplication fee, by sending a letter to the SEC's Public Reference Section,
Washington, DC 20549-0102 or by sending an electronic mail request to
[email protected]. Please call the SEC at 1-202-942-8090 for information about
the Public Reference Room.

Prime Portfolio
SEC 1940 Act file number: 811-7892


                                Back Cover Page
<PAGE>


                                 STATEMENT OF
                            ADDITIONAL INFORMATION

                          SHORT-TERM INVESTMENTS CO.

                                PRIME PORTFOLIO
                            (CASH MANAGEMENT CLASS)
                             (INSTITUTIONAL CLASS)
                          (PERSONAL INVESTMENT CLASS)
                           (PRIVATE INVESTMENT CLASS)
                                (RESERVE CLASS)
                                (RESOURCE CLASS)

                               11 GREENWAY PLAZA
                                   SUITE 100
                           HOUSTON, TEXAS 77046-1173
                                 (800) 659-1005

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

         THIS STATEMENT OF ADDITIONAL INFORMATION IS NOT A PROSPECTUS.
           IT SHOULD BE READ IN CONJUNCTION WITH A PROSPECTUS OF EACH
           OF THE ABOVE-NAMED CLASSES OF THE PRIME PORTFOLIO, COPIES
                      OF WHICH MAY BE OBTAINED BY WRITING
                  FUND MANAGEMENT COMPANY, 11 GREENWAY PLAZA,
                      SUITE 100, HOUSTON, TEXAS 77046-1173
                           OR CALLING (800) 659-1005

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

          STATEMENT OF ADDITIONAL INFORMATION DATED DECEMBER 17, 1999
    RELATING TO THE PROSPECTUS OF EACH OF THE FOLLOWING CLASSES OF THE PRIME
      PORTFOLIO: CASH MANAGEMENT CLASS PROSPECTUS DATED DECEMBER 17, 1999,
  INSTITUTIONAL CLASS PROSPECTUS DATED DECEMBER 17, 1999, PERSONAL INVESTMENT
 CLASS PROSPECTUS DATED DECEMBER 17, 1999, PRIVATE INVESTMENT CLASS PROSPECTUS
 DATED DECEMBER 17, 1999, RESERVE CLASS PROSPECTUS DATED DECEMBER 17, 1999 AND
               RESOURCE CLASS PROSPECTUS DATED DECEMBER 17, 1999

                                      A-1
<PAGE>

                               TABLE OF CONTENTS

<TABLE>
<CAPTION>
                                                                            PAGE
                                                                            ----
      <S>                                                                   <C>
      Introduction......................................................... A-3
      General Information about the Fund................................... A-3
        The Fund and Its Shares............................................ A-3
        Directors and Officers............................................. A-4
        Remuneration of Directors.......................................... A-7
        AIM Funds Retirement Plan for Eligible Directors/Trustees.......... A-8
        Deferred Compensation Agreements................................... A-8
        Investment Advisor................................................. A-8
        Administrator...................................................... A-10
        Expenses........................................................... A-10
        Transfer Agent and Custodian....................................... A-10
        Legal Matters...................................................... A-10
        Reports............................................................ A-11
        Sub-Accounting..................................................... A-11
        Principal Holders of Securities.................................... A-11
        Prime Portfolio.................................................... A-11
        Liquid Assets Portfolio............................................ A-14
      Share Purchases and Redemptions...................................... A-16
        Purchases and Redemptions.......................................... A-16
        Redemptions by the Fund............................................ A-16
        Net Asset Value Determination...................................... A-16
        Distribution Agreement............................................. A-17
        Distribution Plan.................................................. A-17
        Banking Regulations................................................ A-19
        Performance Information............................................ A-19
        Redemptions in Kind................................................ A-20
      Investment Program and Restrictions.................................. A-20
        Investment Program................................................. A-20
        Investment Policies................................................ A-21
        Eligible Securities................................................ A-23
        Commercial Paper Ratings........................................... A-23
        Bond Ratings....................................................... A-23
        Investment Restrictions............................................ A-25
      Portfolio Transactions and Brokerage................................. A-25
        General Brokerage Policy........................................... A-25
        Allocation of Portfolio Transactions............................... A-26
        Section 28(e) Standards............................................ A-26
      Dividends, Distributions and Tax Matters............................. A-27
        Dividends and Distributions........................................ A-27
        Tax Matters........................................................ A-28
        Qualification as a Regulated Investment Company.................... A-28
        Excise Tax On Regulated Investment Companies....................... A-28
        Portfolio Distributions............................................ A-29
        Sale or Redemption of Shares....................................... A-29
        Foreign Shareholders............................................... A-29
        Effect of Future Legislation; Local Tax Considerations............. A-30
      Financial Statements.................................................   FS
</TABLE>

                                      A-2
<PAGE>

                                 INTRODUCTION

  The Prime Portfolio (the "Portfolio") is an investment portfolio of Short-
Term Investments Co. (the "Fund"), a mutual fund. The rules and regulations of
the United States Securities and Exchange Commission (the "SEC") require all
mutual funds to furnish prospective investors certain information concerning
the activities of the fund being considered for investment. This information
is included in the Cash Management Class Prospectus dated December 17, 1999,
the Institutional Class Prospectus dated December 17, 1999, the Personal
Investment Class Prospectus dated December 17, 1999, the Private Investment
Class Prospectus dated December 17, 1999, the Reserve Class Prospectus dated
December 17, 1999 and the Resource Class Prospectus dated December 17, 1999
(each a "Prospectus"). Copies of each Prospectus and additional copies of this
Statement of Additional Information may be obtained without charge by writing
the distributor of the Portfolio's shares, Fund Management Company ("FMC"), 11
Greenway Plaza, Suite 100, Houston, Texas 77046-1173 or by calling (800) 659-
1005. Investors must receive a Prospectus before they invest.

  This Statement of Additional Information is intended to furnish prospective
investors with additional information concerning the Fund and each class of
the Portfolio. Some of the information required to be in this Statement of
Additional Information is also included in each Prospectus; thus, in order to
avoid repetition, reference will be made to sections of the applicable
Prospectus. Additionally, each Prospectus and this Statement of Additional
Information omit certain information contained in the registration statement
filed with the SEC. Copies of the registration statement, including items
omitted from each Prospectus and this Statement of Additional Information, may
be obtained from the SEC by paying the charges prescribed under its rules and
regulations.

                      GENERAL INFORMATION ABOUT THE FUND

THE FUND AND ITS SHARES

  The Fund is an open-end, diversified series management investment company
which was organized as a corporation under the laws of the State of Maryland
on May 3, 1993. On October 15, 1993, the Portfolio succeeded to the assets and
assumed the liabilities of the Prime Portfolio (the "Predecessor Portfolio")
of Short-Term Investments Co., a Massachusetts business trust ("STIC"),
pursuant to an Agreement and Plan of Reorganization between the Fund and STIC.
All historical financial and other information contained in this Statement of
Additional Information for periods prior to October 15, 1993 relating to the
Portfolio (or a class thereof) is that of the Predecessor Portfolio (or the
corresponding class thereof). Shares of common stock of the Fund are
redeemable at their net asset value at the option of the shareholder or at the
option of the Fund in certain circumstances. For information concerning the
methods of redemption and the rights of share ownership, investors should
consult each Prospectus under the caption "Redeeming Shares."

  The Fund offers on a continuous basis shares representing an interest in one
of two portfolios: the Portfolio and the Liquid Assets Portfolio (together,
the "Portfolios"). The Portfolio consists of the following six classes of
shares: Cash Management Class, Institutional Class, Personal Investment Class,
Private Investment Class, the Reserve Class and the Resource Class. The Liquid
Assets Portfolio consists of six classes of shares. Each class of shares has
different shareholder qualifications and bears expenses differently. This
Statement of Additional Information relates to each class of the Portfolio.
The classes of the Liquid Assets Portfolio are offered pursuant to separate
prospectuses and a separate statement of additional information.

  As used in each Prospectus, the term "majority of the outstanding shares" of
the Fund, a particular portfolio or a particular class means, respectively,
the vote of the lesser of (i) 67% or more of the shares of the Fund, such
portfolio or such class present at a meeting of the Fund's shareholders, if
the holders of more than 50% of the outstanding shares of the Fund, such
portfolio or such class are present or represented by proxy, or (ii) more than
50% of the outstanding shares of the Fund, such portfolio or such class.

  Shareholders of the Fund do not have cumulative voting rights, and therefore
the holders of more than 50% of the outstanding shares of the Fund voting
together for election of directors can elect all of the members of the Board
of Directors of the Fund. In such event, the remaining holders cannot elect
any members of the Board of Directors of the Fund.

  There are no preemptive or conversion rights applicable to any of the Fund's
shares. The Fund's shares, when issued, will be fully paid and non-assessable,
Shares are fully assignable and subject to encumbrance by a shareholder. The
Board of Directors may classify or reclassify any unissued shares of any class
or classes in addition to those already authorized by setting or changing in
any one or more respects, from time to time, prior to the issuance of such
shares, the preferences, conversion or other rights, voting powers,
restrictions, limitations as to dividends, qualifications, or terms or
conditions of redemption, of such shares. Any such classification or
reclassification will comply with the provisions of the Investment Company Act
of 1940, as amended (the "1940 Act").

  The Board of Directors may classify or reclassify any unissued shares of any
class or classes in addition to those already authorized by setting or
changing in any one or more respects, from time to time, prior to the issuance
of such shares, the preferences, conversion or other rights, voting powers,
restrictions, limitations as to dividends, qualifications, or terms or
conditions of redemption of such shares. Any such classification or
reclassification will comply with the provisions of the 1940 Act.

                                      A-3
<PAGE>

  The Charter of the Fund authorizes the issuance of 60 billion shares with a
par value of $.001 each, of which 25 billion shares represent an interest in
the Liquid Assets Portfolio (or class thereof) and 25 billion shares represent
an interest in the Portfolio (or class thereof). A share of a Portfolio (or
class) represents an equal proportionate interest in such portfolio (or class)
with each other share of that portfolio (or class) and is entitled to a
proportionate interest in the dividends and distributions from that portfolio
(or class).

  The assets received by the Fund for the issue or sale of shares of each of
the Portfolios and all income, earnings, profits, losses and proceeds
therefrom, subject only to the rights of creditors, are allocated to that
portfolio, and constitute the underlying assets of that portfolio. The
underlying assets of each of the Portfolios are segregated and are charged
with the expenses with respect to that portfolio and with a share of the
general expenses of the Fund. While the expenses of the Fund are allocated to
the separate books of account of each of the Portfolios, certain expenses may
be legally chargeable against the assets of the entire Fund.

  The Charter provides that no director or officer of the Fund shall be liable
to the Fund or its shareholders for money damages, except (i) to the extent
that it is proved that such director or officer actually received an improper
benefit or profit in money, property or services, for the amount of the
benefit or profit in money, property or services actually received, or (ii) to
the extent that a judgment or other final adjudication adverse to such
director or officer is entered in a proceeding based on a finding in the
proceeding that such director's or officer's action, or failure to act, was
the result of active and deliberate dishonesty and was material to the cause
of action adjudicated in the proceeding. The foregoing shall not be construed
to protect or purport to protect any director or officer of the Fund against
any liability to the Fund or its shareholders to which such director or
officer would otherwise be subject by reason of willful misfeasance, bad
faith, gross negligence or reckless disregard of the duties involved in the
conduct of such office. The Fund shall indemnify and advance expenses to its
currently acting and its former directors to the fullest extent that
indemnification of directors is permitted by the Maryland General Corporation
Law. The Fund shall indemnify and advance expenses to its officers to the same
extent as its directors and to such further extent as is consistent with law.
The Board of Directors may by By-Law, resolution or agreement make further
provision for indemnification of directors, officers, employees and agents of
the Fund to the fullest extent permitted by the Maryland General Corporation
Law.

  As described in each Prospectus, the Fund will not normally hold annual
shareholders' meetings. At such time as less than a majority of the directors
have been elected by the shareholders, the directors then in office will call
a shareholders' meeting for the election of directors. Upon written request by
ten or more shareholders who have been such for at least six months and who
hold shares constituting 1% of the outstanding shares, stating that such
shareholders wish to communicate with the other shareholders for the purpose
of obtaining the signatures necessary to demand a meeting to consider removal
of a director, the Fund has undertaken to provide a list of shareholders or to
disseminate appropriate materials (at the expense of the requesting
shareholders).

  Except as otherwise disclosed in each Prospectus and in this Statement of
Additional Information, the directors shall continue to hold office and may
appoint their successors.

  The overall management of the business and affairs of the Fund is vested
with its Board of Directors. The Board of Directors approves all significant
agreements between the Fund and persons or companies furnishing services to
the Fund, including agreements with the Fund's investment advisor,
distributor, custodian and transfer agent. The day-to-day operations of the
Fund are delegated to the Fund's officers and to A I M Advisors, Inc. ("AIM"),
subject always to the objective and policies of the Fund and to the general
supervision of the Fund's Board of Directors. Certain directors and officers
of the Fund are affiliated with AIM and A I M Management Group Inc. ("AIM
Management"), the parent corporation of AIM.

DIRECTORS AND OFFICERS

  The directors and officers of the Fund and their principal occupations
during at least the last five years are set forth below. Unless otherwise
indicated, the address of each director and officer is 11 Greenway Plaza,
Suite 100, Houston, Texas 77046.


<TABLE>
<CAPTION>
                            POSITIONS HELD      PRINCIPAL OCCUPATION DURING AT
  NAME, ADDRESS AND AGE     WITH REGISTRANT         LEAST THE PAST 5 YEARS
  ---------------------     ---------------     ------------------------------

- ------------------------------------------------------------------
  <C>                    <C>                   <S>
  *CHARLES T. BAUER (80) Director and Chairman Chairman of the Board of
                                               Directors, A I M Management
                                               Group Inc., 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; and
                                               Executive Vice Chairman and
                                               Director, AMVESCAP PLC.
</TABLE>

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

                                      A-4
<PAGE>


<TABLE>
<CAPTION>
                                                                 PRINCIPAL OCCUPATION
                                            POSITIONS HELD     DURING AT LEAST THE PAST
          NAME, ADDRESS AND AGE            WITH REGISTRANT              5 YEARS
          ---------------------            ---------------     ------------------------

- ---------------------------------------------------------------------------------------
  <C>                                   <C>                    <S>
  BRUCE L. CROCKETT (55)                       Director        Director, ACE Limited
  906 Frome Lane                                               (insurance company).
  McLean, VA 22102                                             Formerly, Director,
                                                               President and Chief
                                                               Executive Officer,
                                                               COMSAT Corporation; and
                                                               Chairman, Board of
                                                               Governors of INTELSAT
                                                               (international
                                                               communications company).

- ---------------------------------------------------------------------------------------
  OWEN DALY II, (75)                           Director        Director, Cortland Trust
  Six Blythewood Road                                          Inc. (investment
  Baltimore, MD 21210                                          company). Formerly,
                                                               Director, CF & I Steel
                                                               Corp., Monumental Life
                                                               Insurance Company and
                                                               Monumental General
                                                               Insurance Company; and
                                                               Chairman of the Board of
                                                               Equitable
                                                               Bancorporation.

- ---------------------------------------------------------------------------------------
  EDWARD K. DUNN, JR. (64)                     Director        Chairman of the Board of
  2 Hopkins Plaza, 8th Floor, Suite 805                        Directors, Mercantile
  Baltimore, MD 21201                                          Mortgage Corp; Formerly,
                                                               Vice Chairman of the
                                                               Board of Directors and
                                                               President, Mercantile -
                                                               Safe Deposit & Trust
                                                               Co.; and President,
                                                               Mercantile Bankshares.

- ---------------------------------------------------------------------------------------
  JACK M. FIELDS, (47)                         Director        Chief Executive Officer,
  8810 Will Clayton Parkway                                    Texana Global, Inc.
  Jetero Plaza, Suite E                                        (foreign trading
  Humble, TX 77338                                             company) and Twenty
                                                               First Century Group,
                                                               Inc. (a governmental
                                                               affairs company).
                                                               Formerly, Member of the
                                                               U.S. House of
                                                               Representatives.

- ---------------------------------------------------------------------------------------
  **CARL FRISCHLING, (62)                      Director        Partner, Kramer Levin
   919 Third Avenue                                            Naftalis & Frankel LLP
   New York, NY 10022                                          (law firm). Formerly,
                                                               Partner, Reid & Priest
                                                               (law firm).

- ---------------------------------------------------------------------------------------
  *ROBERT H. GRAHAM, (53)               Director and President Director, President and
                                                               Chief Executive Officer,
                                                               A I M 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.

- ---------------------------------------------------------------------------------------
  PREMA MATHAI-DAVIS (49)                      Director        Chief Executive Officer,
  350 Fifth Avenue, Suite 301                                  YWCA of the U.S.A.;
  New York, NY 10118                                           Commissioner, New York
                                                               City Department for the
                                                               Aging; and Member of the
                                                               Board of Directors,
                                                               Metropolitan
                                                               Transportation Authority
                                                               of New York State.

- ---------------------------------------------------------------------------------------
  LEWIS F. PENNOCK, (57)                       Director        Attorney in private
  6363 Woodway, Suite 825                                      practice in Houston,
  Houston, TX 77057                                            Texas.

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

- ---------------------------------------------------------------------------------------
  LOUIS S. SKLAR, (60)                         Director        Executive Vice
  Transco Tower, 50th Floor                                    President, Development
  2800 Post Oak Blvd.                                          and Operations, Hines
  Houston, TX 77056                                            Interests Limited
                                                               Partnership (real estate
                                                               development).

=======================================================================================
</TABLE>

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

                                      A-5
<PAGE>


<TABLE>
<CAPTION>
===============================================================================

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

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

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

- -------------------------------------------------------------------------------
  CAROL F. RELIHAN, (45)  Senior Vice President Director, Senior Vice
                              and Secretary     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; General
                                                Counsel and Vice President,
                                                A I M Fund Services, Inc.; and
                                                Vice President, A I M Capital
                                                Management, Inc., and A I M
                                                Distributors, Inc.

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

- -------------------------------------------------------------------------------
  MELVILLE B. COX, (56)      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.

- -------------------------------------------------------------------------------
  KAREN DUNN KELLEY (39)     Vice President     Senior Vice President, A I M
                                                Capital Management, Inc.; and
                                                Vice President, A I M Advisors,
                                                Inc.

- -------------------------------------------------------------------------------
  J. ABBOTT SPRAGUE, (44)    Vice President     Director and President, Fund
                                                Management Company; Director,
                                                A I M Fund Services, Inc.; and
                                                Senior Vice President, A I M
                                                Advisors, Inc. and A I M
                                                Management Group Inc.

===============================================================================
</TABLE>


                                      A-6
<PAGE>
  The Board of Directors has an Audit Committee, an Investments Committee, and
a Nominating and Compensation Committee.

  The members of the Audit Committee are Messrs. Crockett, Daly, Dunn
(Chairman), Fields, Frischling, Pennock, Sklar and Dr. Mathai-Davis. The Audit
Committee is responsible for meeting with the Fund's auditors to review audit
procedures and results and to consider any matters arising from an audit to be
brought to the attention of the directors as a whole with respect to the
Fund's fund accounting or its internal accounting controls, and for
considering such matters as may from time to time be set forth in a charter
adopted by the Board of Directors and such Committee.

  The members of the Investments Committee are Messrs. Bauer, Crockett, Daly,
Dunn, Fields, Frischling, Pennock, Sklar (Chairman) and Dr. Mathai-Davis. The
Investments Committee is responsible for reviewing portfolio compliance,
brokerage allocation, portfolio investment pricing issues, interim dividend
and distribution issues, and considering such matters as may from time to time
be set forth in a charter adopted by the Board of Directors and such
Committee.

  The members of the Nominating and Compensation Committee are Messrs.
Crockett (Chairman), Daly, Dunn, Fields, Pennock, Sklar and Dr. Mathai-Davis.
The Nominating and Compensation Committee is responsible for considering and
nominating individuals to stand for election as directors who are not
interested persons as long as the Fund maintains a distribution plan pursuant
to Rule 12b-1 under the 1940 Act, reviewing from time to time the compensation
payable to the disinterested directors, or considering such matters as may
from time to time be set forth in a charter adopted by the Board of Directors
and such Committee.

  All of the Fund's directors also serve as directors or trustees of some or
all of the other investment companies managed or advised by AIM. All of the
Fund's executive officers hold similar offices with some or all of such
investment companies.

REMUNERATION OF DIRECTORS

  Each director is reimbursed for expenses incurred in connection with each
meeting of the Board of Directors or any Committee attended. The directors of
the Fund who do not serve as officers of the Fund are compensated for their
services according to a fee schedule which recognizes the fact that they also
serve as directors or trustees of certain other regulated investment companies
managed, administered or distributed by AIM or its affiliates (the "AIM
Funds"). Each such director receives a fee, allocated among the AIM Funds for
which he or she serves as a director or trustee, which consists of an annual
retainer component and a meeting fee component.

  Set forth below is information regarding compensation paid or accrued for
each director of the Fund:

<TABLE>
<CAPTION>
                                                     RETIREMENT       TOTAL
                                      AGGREGATE       BENEFITS     COMPENSATION
                                     COMPENSATION  ACCRUED BY ALL    FROM ALL
             DIRECTOR                FROM FUND(1)   AIM FUNDS(2)   AIM FUNDS(3)
             --------               -------------- -------------- --------------
<S>                                 <C>            <C>            <C>
Charles T. Bauer...................        -0-             -0-            -0-
Bruce L. Crockett..................     $9,888        $ 37,485       $ 96,000
Owen Daly II.......................      9,888         122,898         96,000
Edward K. Dunn, Jr.................      9,888             -0-         78,889
Jack M. Fields.....................      9,845          15,826         95,500
Carl Frischling(4).................      9,844          97,791         95,500
Robert H. Graham...................        -0-             -0-            -0-
John F. Kroeger(5).................        731         107,896         91,654
Prema Mathai-Davis.................      9,337             -0-         32,636
Lewis F. Pennock...................      9,844          45,766         95,500
Ian W. Robinson(6).................      5,857          94,442         94,500
Louis S. Sklar.....................      9,844          90,232         95,500
</TABLE>
- -------
(1)   The total amount of compensation deferred by all directors of the Fund
      during the fiscal year ended August 31, 1999, including interest earned
      thereon, was $61,406.
(2)   During the fiscal year ended August 31, 1999, the total amount of expenses
      allocated to the Fund in respect of such retirement benefits was $96,514.
      Data reflects compensation earned for the calendar year ended December 31,
      1998.
(3)   Each director serves as a director or trustee of a total of 12 registered
      investment companies advised by AIM as of December 31, 1998 . Data
      reflects total compensation earned during the calendar year ended
      December 31, 1998.
(4)   The Fund paid the law firm of Kramer Levin Naftalis & Frankel LLP $20,924
      in legal fees for services provided to the Portfolio during the fiscal
      year ended August 31, 1999. Mr. Frischling, a director of the Fund, is a
      partner in such firm.
(5)   Mr. Kroeger was a director of the Fund until June 11, 1998, when he
      resigned. On that date he became a consultant to the Fund. Of the amount
      listed above, $0 was for compensation for services as a director and the
      remainder as a consultant. Mr. Kroeger passed away on November 26, 1998.
      Mr. Kroeger's widow will receive his pension as described below under "AIM
      Funds Retirement Plan for Eligible Directors/Trustees."
(6)   Mr. Robinson was a director until March 12, 1999, when he retired.

                                      A-7
<PAGE>

AIM FUNDS RETIREMENT PLAN FOR ELIGIBLE DIRECTORS/TRUSTEES

  Under the terms of the AIM Funds Retirement Plan for Eligible
Directors/Trustees (the "Plan"), each director (who is not an employee of any
of the AIM Funds, AIM Management or any of their affiliates) may be entitled
to certain benefits upon retirement from the Board of Directors. Pursuant to
the Plan, the normal retirement date is the date on which the eligible
director has attained age 65 and has completed at least five years of
continuous service with one or more of the regulated investment companies
managed, administered or distributed by AIM or its affiliates (the "Applicable
AIM Funds"). Each eligible director is entitled to receive an annual benefit
from the Applicable AIM Funds commencing on the first day of the calendar
quarter coincident with or following his date of retirement equal to a maximum
of 75% of the annual retainer paid or accrued by the Applicable AIM Funds for
such director during the twelve-month period immediately preceding the
director's retirement (including amounts deferred under a separate agreement
between the Applicable AIM Funds and the director) and based on the number of
such director's years of service (not in excess of 10 years of service)
completed with respect to any of the Applicable AIM Funds. Such benefit is
payable to each eligible director in quarterly installments. If an eligible
director dies after attaining the normal retirement date but before receipt of
any benefits under the Plan commences, the director's surviving spouse (if
any) shall receive a quarterly survivor's benefit equal to 50% of the amount
payable to the deceased director, for no more than ten years beginning the
first day of the calendar quarter following the date of the director's death.
Payments under the Plan are not secured or funded by any Applicable AIM Fund.

  Set forth below is a table that shows the estimated annual benefits payable
to an eligible director upon retirement assuming a specified level of
compensation and years of service classifications. The estimated credited
years of service as of August 31, 1999, for Messrs. Crockett, Daly, Dunn,
Fields, Frischling, Kroeger, Pennock, Robinson, Sklar and Dr. Mathai-Davis are
12, 12, 1, 2, 22, 20, 18, 11, 10 and 1 years, respectively.

                   ESTIMATED ANNUAL BENEFITS UPON RETIREMENT

<TABLE>
<CAPTION>
                                                               ANNUAL RETIREMENT
                             NUMBER OF                           COMPENSATION
                             YEARS OF                             PAID BY ALL
                           SERVICE WITH                           APPLICABLE
                       APPLICABLE AIM FUNDS                        AIM FUNDS
                       --------------------                    -----------------
     <S>                                                       <C>
               10.............................................      $67,500
                9.............................................      $60,750
                8.............................................      $54,000
                7.............................................      $47,250
                6.............................................      $40,500
                5.............................................      $33,750
</TABLE>

DEFERRED COMPENSATION AGREEMENTS

  Messrs. Daly, Dunn, Fields, Frischling, Robinson and Sklar (for purposes of
this paragraph only, the "deferring directors") have each executed a Deferred
Compensation Agreement (collectively, the "Agreements"). Pursuant to the
Agreements, the deferring directors elected to defer receipt of 100% of their
compensation payable by the Fund, and such amounts are placed into a deferral
account. Currently, the deferring directors may select various AIM Funds in
which all or part of their deferral account shall be deemed to be invested.
Distributions from the deferring directors' deferral accounts will be paid in
cash, in generally in equal quarterly installments over a period of five (5)
or ten (10) years (depending on the Agreement) beginning on the date the
deferring director's retirement benefits commence under the Plan. The Fund's
Board of Directors, in its sole discretion, may accelerate or extend the
distribution of such deferral accounts after the deferring director's
termination of service as a director of the Fund. If a deferring director dies
prior to the distribution of amounts in his deferral account, the balance of
the deferral account will be distributed to his designated beneficiary in a
single lump sum payment as soon as practicable after such deferring director's
death. The Agreements are not funded and, with respect to the payments of
amounts held in the deferral accounts, the deferring directors have the status
of unsecured creditors of the Fund and of each other AIM Fund from which they
are deferring compensation.

  During the fiscal year ended August 31, 1999, $63,108 in directors' fees and
expenses were allocated to the Portfolio.

INVESTMENT ADVISOR

  AIM was organized in 1976 and, together with its subsidiaries, advises,
manages or administers over 125 investment portfolios encompassing a broad
range of investment objectives. AIM is a wholly owned subsidiary of AIM
Management, a holding company that has been engaged in the financial services
business since 1976. The address of AIM is 11 Greenway Plaza, Suite 100,
Houston, Texas 77046-1173. AIM Management is an indirect wholly owned
subsidiary of AMVESCAP PLC, 11 Devonshire Square, London EC2M 4YR, United
Kingdom. AMVESCAP PLC and its subsidiaries are

                                      A-8
<PAGE>

an independent investment management group engaged in institutional investment
management and retail fund businesses in the United States, Europe and the
Pacific Region. Certain of the directors and officers of AIM are also
executive officers of the Fund and their affiliations and addresses are shown
under "Directors and Officers."

  FMC is a registered broker-dealer and a wholly owned subsidiary of AIM. FMC
acts as distributor of the shares of the Portfolio.

  AIM and the Fund have adopted a Code of Ethics which requires investment
personnel (a) to pre-clear all personal securities transactions subject to the
Code of Ethics, (b) to file reports regarding such transactions (c) to refrain
from personally engaging in (i) short-term trading of a security, (ii)
transactions involving a security within seven days of an AIM Fund transaction
involving the same security, and (iii) transactions involving securities being
considered for investment by an AIM Fund and (d) to abide by certain other
provisions under the Code of Ethics. The Code of Ethics also prohibits
investment personnel and all other AIM Employees from purchasing securities in
an initial public offering. Personal trading reports are reviewed periodically
by AIM, and the Board of Directors reviews quarterly and annual reports
(including information on any substantial violations of the Code of Ethics).
Sanctions for violations of the Code of Ethics may include censure, monetary
penalties, suspension or termination of employment.

  The Fund has entered into a Master Investment Advisory Agreement (the
"Advisory Agreement") with AIM. The Advisory Agreement will continue from year
to year, provided that it is specifically approved at least annually by the
Fund's Board of Directors and the affirmative vote of a majority of the
directors who are not parties to the Advisory Agreement or "interested
persons" of any such party by votes cast in person at a meeting called for
such purpose. The Fund or AIM may terminate the Advisory Agreement on 60 days'
written notice without penalty. The Advisory Agreement terminates
automatically in the event of its "assignment," as defined in the 1940 Act.

  Pursuant to the terms of the Advisory Agreement, AIM manages the investment
of the Portfolio's assets. AIM obtains and evaluates economic, statistical and
financial information to formulate and implement investment policies for the
Portfolio. Any investment program undertaken by AIM will at all times be
subject to the policies and control of the Fund's Board of Directors. AIM
shall not be liable to the Fund or its shareholders for any act or omission by
AIM or for any loss sustained by the Fund or its shareholders except in the
case of willful misfeasance, bad faith, gross negligence or reckless disregard
of duty.

  Pursuant to the Advisory Agreement between the Fund and AIM currently in
effect and under an investment advisory agreement in effect prior to February
28, 1997 which provided for the same level of compensation to AIM, AIM
received fees from the Fund for the fiscal years ended August 31, 1999, 1998
and 1997, with respect to the Portfolio, in the amounts of $5,205,023,
$4,251,522 and $4,007,070, respectively. During the fiscal years ended August
31, 1999, 1998 and 1997 AIM voluntarily waived no advisory fees with respect
to the Portfolio.

  As compensation for its services, AIM receives a monthly fee which is
calculated by applying the following annual rates to the average daily net
assets of the Portfolio:

<TABLE>
<CAPTION>
           NET ASSETS                                                       RATE
           ----------                                                       ----
      <S>                                                                   <C>
      First $100 million................................................... .20%
      Over $100 million to $200 million.................................... .15%
      Over $200 million to $300 million.................................... .10%
      Over $300 million to $1.5 billion.................................... .06%
      Over $1.5 billion.................................................... .05%
</TABLE>

  AIM may from time to time waive or reduce its fee. Voluntary fee waivers or
reductions may be rescinded at any time without further notice to investors.
During periods of voluntary fee waivers or reductions, AIM will retain its
ability to be reimbursed for such fee prior to the end of each fiscal year.
Contractual fee waivers or reductions set forth in the Fee Table in a
Prospectus may not be terminated or amended to the Portfolio's detriment
during the period stated in the agreement between AIM and the Fund.

  The Advisory Agreement provides that, upon the request of the Board of
Directors, AIM may perform (or arrange for the performance of) certain
additional services on behalf of the Portfolio which are not required by the
Advisory Agreement. AIM may receive reimbursement or reasonable compensation
for such additional services, as may be agreed upon by AIM and the Board of
Directors, based upon a finding by the Board of Directors that the provision
of such services would be in the best interest of the Portfolio and its
shareholders. The Board of Directors has made such a finding and, accordingly,
the Fund has entered into a Master Administrative Services Agreement under
which AIM will provide the additional services described below under the
caption "Administrator."

                                      A-9
<PAGE>

ADMINISTRATOR

  AIM also acts as the Portfolio's administrator pursuant to a Master
Administrative Services Agreement between AIM and the Fund (the
"Administrative Services Agreement").

  Under the Administrative Services Agreement, AIM performs, or arranges for
the performance of, accounting and other administrative services for the
Portfolio which are not required to be performed by AIM under the Advisory
Agreement. As full compensation for the performance of such services, AIM is
reimbursed for any personnel and other costs (including applicable office
space, facilities and equipment) of furnishing the services of a principal
financial officer of the Fund and of persons working under his supervision for
maintaining the financial accounts and books and records of the Fund,
including calculation of the Portfolio's daily net asset value, and preparing
tax returns and financial statements for the Portfolio. The method of
calculating such reimbursements must be annually approved, and the amounts
paid will be periodically reviewed, by the Fund's Board of Directors.

  Under the Administrative Services Agreement and under a prior administrative
services agreement which provided for the same level of reimbursement to AIM,
AIM was reimbursed for the fiscal years ended August 31, 1999, 1998 and 1997
in the amounts of $258,934, $124,103 and $114,738, respectively, for fund
accounting services for the Portfolio.

EXPENSES

  Expenses of the Fund include, but are not limited to, fees paid to AIM under
the Advisory Agreement the charges and expenses of any registrar, any
custodian or depositary appointed by the Fund for the safekeeping of cash,
portfolio securities and other property, and any transfer, dividend or
accounting agent or agents appointed by the Fund; brokers' commissions
chargeable to the Fund in connection with portfolio securities transactions to
which the Fund is a party; all taxes, including securities issuance and
transfer taxes, and fees payable by the Fund to federal, state or other
governmental agencies; the costs and expenses of engraving or printing of
certificates representing shares of the Fund; all costs and expenses in
connection with the registration and maintenance of registration of the Fund
and shares with the SEC and various states and other jurisdictions (including
filing and legal fees and disbursements of counsel); the costs and expenses of
printing, including typesetting, and distributing prospectuses and statements
of additional information of the Fund and supplements thereto to the Fund's
shareholders; all expenses of shareholders' and directors' meetings and of
preparing, printing and mailing of prospectuses, proxy statements and reports
to shareholders; fees and travel expenses of directors and director members of
any advisory board or committee; all expenses incident to the payment of any
dividend, distribution, withdrawal or redemption, whether in shares or in
cash; charges and expenses of any outside service used for pricing of the
Fund's shares; charges and expenses of legal counsel, including counsel to the
directors of the Fund who are not "interested persons" (as defined in the 1940
Act) of the Fund or AIM, and of independent accountants in connection with any
matter relating to the Fund; membership dues of industry associations;
interest payable on Fund borrowings; postage; insurance premiums on property
or personnel (including officers and directors) of the Fund which inure to its
benefit; and extraordinary expenses (including, but not limited to, legal
claims and liabilities and litigation costs and any indemnification related
thereto). FMC bears the expenses of printing and distributing prospectuses and
statements of additional information (other than those prospectuses and
statements of additional information distributed to existing shareholders of
the Fund) and any other promotional or sales literature used by FMC or
furnished by FMC to purchasers or dealers in connection with the public
offering of the Fund's shares.

  Expenses of the Fund which are not directly attributable to the operations
of either of the Portfolios are prorated among all classes of the Fund.
Expenses of the Fund except those listed in the next sentence are prorated
among all classes of such Portfolios. Distribution and service fees, transfer
agency fees and shareholder recordkeeping fees which are directly attributable
to a specific class of shares are charged against the income available for
distribution as dividends to the holders of such shares.

TRANSFER AGENT AND CUSTODIAN

  A I M Fund Services, Inc. ("AFS"), a wholly owned subsidiary of AIM, P.O.
Box 4497, Houston, Texas 77210-4497, serves as a transfer agent and dividend
disbursing agent for the shares of all classes of the Portfolio pursuant to a
Transfer Agency and Service Agreement and receives an annual fee from the Fund
for its services in such capacity in the amount of 0.009% of average daily net
assets of the Portfolio, payable monthly. Such compensation may be changed
from time to time as is agreed to by AFS and the Fund.

  The Bank of New York ("BONY"), 90 Washington Street, 11th Floor, New York,
New York 10286, acts as custodian for the portfolio securities and cash of the
Portfolio. BONY receives such compensation from the Fund for its services in
such capacity as is agreed to from time to time by BONY and the Fund.

LEGAL MATTERS

  The law firm of Ballard Spahr Andrews & Ingersoll, LLP, Philadelphia,
Pennsylvania serves as counsel to the Fund.

                                     A-10
<PAGE>

REPORTS

  The Fund furnishes shareholders with semi-annual reports containing
information about the Fund and its operations, including a schedule of
investments held in the Portfolio and its financial statements. The annual
financial statements are audited by the Fund's independent auditors. The Board
of Directors has selected KPMG LLP, 700 Louisiana, Houston, Texas 77002, as
the independent auditors to audit the financial statements and review the tax
returns of the Portfolio.

  Duplicate confirmations may be transmitted to the beneficial owner of the
sub-account if requested by the institution. The institution will receive a
monthly statement setting forth, for each sub-account, the share balance,
income earned for the month, income earned for the year to date and the total
current value of the account.

SUB-ACCOUNTING

  The Fund and FMC have arranged for AFS or the Portfolio to offer sub-
accounting services to shareholders of the Portfolio and to maintain
information with respect to the underlying beneficial ownership of the shares
of each class of the Portfolio. Investors who purchase shares of the Portfolio
for the account of others can make arrangements through the Fund or FMC for
these sub-accounting services. In addition, shareholders utilizing certain
versions of AIM LINK--Registered Trademark--Remote, a personal computer
application software product, may receive sub-accounting services via such
software.

PRINCIPAL HOLDERS OF SECURITIES

PRIME PORTFOLIO

  To the best of the knowledge of the Fund, the names and addresses of the
holders of 5% or more of the outstanding shares of each class of the Portfolio
as of November 1, 1999, and the percentage of the Portfolio's outstanding
shares owned by such shareholders as of such date are as follows:

<TABLE>
<CAPTION>
                                                  PERCENT OWNED   PERCENT OWNED
                  NAME AND ADDRESS                      OF        OF RECORD AND
                  OF RECORD OWNER                 RECORD ONLY(a) BENEFICIALLY(a)
                  ----------------                -------------- ---------------
   CASH MANAGEMENT CLASS
   ---------------------
   <S>                                            <C>            <C>
    BANK OF NEW YORK.............................     30.14%            --
     One Wall Street
     5th Floor
     Stif/Master Note
     New York, NY 10286
    CIBC WORLD MARKETS...........................     14.85%            --
     200 Liberty Street
     World Financial Center
     Attn: Lester Elson
     New York, NY 10281
    IGT..........................................      8.92%            --
     P.O. Box 10120
     Reno, NV 89502
    BOST & CO FBO THE KWELM PARTNERSHIP..........      7.13%            --
     P.O. Box 3198
     Attn: Mutual Fund Operations
     Pittsburgh, PA 15230-3198
    BANK ONE, ILLINOIS, NA.......................      6.71%            --
     Attn: Tony Long
     525 W. Monroe
     Suite 0256, 6th Floor
     Chicago, IL 60670
    MELLON BANK NA...............................      5.39%            --
     Attn: Cynthia Kieffer
     P.O. Box 710
     Pittsburgh, PA 15230-0710
</TABLE>

 -------
(a) The Fund has no knowledge as to whether all or any portion of the shares
    of the class owned of record are also owned beneficially.

                                     A-11
<PAGE>

<TABLE>
<CAPTION>
                                                     PERCENT      PERCENT OWNED
                  NAME AND ADDRESS                   OWNED OF     OF RECORD AND
                  OF RECORD OWNER                 RECORD ONLY(a) BENEFICIALLY(a)
                  ----------------                -------------- ---------------
   INSTITUTIONAL CLASS
   -------------------
   <S>                                            <C>            <C>
    AIM FUND OF FUNDS ACCOUNT....................     31.02%(b)         --
     Attn: Stacey Frakes
     Money Market Portfolio Admin.
     11 Greenway Plaza, Ste 100
     Houston, TX 77046
    COMERICA BANK................................      6.33%            --
     P.O. Box 75000
     Attn: Vicky Froehlich
     Detroit, MI 48275-3455


    TRULIN & CO..................................      5.76%            --
     P.O. Box 1412
     Attn: Pat Whalen
     Rochester, NY 14603
    FROST NATIONAL BANK TX.......................      5.08%            --
     Muir & Co
     C/O Frost
     P.O. Box 2479
     San Antonio, TX 78298-2479
<CAPTION>
   PERSONAL INVESTMENT CLASS
   -------------------------
   <S>                                            <C>            <C>
    CULLEN/FROST DISCOUNT BROKERS................     84.50%            --
     Attn: Karen Banks
     P.O. Box 2358
     San Antonio, TX 78299
    FIRST INTERSTATE - MONTANA...................      5.86%            --
     Attn: Cheri Melvin
     P.O. Box 30918
     Billings, MT 59116
<CAPTION>
   PRIVATE INVESTMENT CLASS
   ------------------------
   <S>                                            <C>            <C>
    HUNTINGTON CAPITAL CORP .....................     34.31%            --
     41 S. High Street, Ninth Floor
     Columbus, OH 43287
    HARRIS TRUST & SAVINGS BANK..................     18.06%            --
     Attn: Rich Croll
     111 West Monroe St.
     Lower Level East
     Chicago, IL 60690
    CULLEN/FROST DISCOUNT BROKERS................      9.46%            --
     Attn: Karen Banks
     P.O. Box 2358
     San Antonio, TX 78299
</TABLE>
- -------
(a) The Fund has no knowledge as to whether all or any portion of the shares
    of the class owned of record are also owned beneficially.
(b) A shareholder who holds 25% or more of the outstanding shares of a
    Portfolio may be presumed to be in "control" of such Portfolio as defined
    in the 1940 Act.

                                     A-12
<PAGE>

<TABLE>
<CAPTION>
                                                    PERCENT      PERCENT OWNED
                 NAME AND ADDRESS                   OWNED OF     OF RECORD AND
                  OF RECORD OWNER                RECORD ONLY(a) BENEFICIALLY(a)
                 ----------------                -------------- ---------------
   <S>                                           <C>            <C>
    FROST NATIONAL BANK TX......................      7.21%            --
     Muir & Co
     C/O Frost
     P.O. Box 2479
     San Antonio, TX 78298-2479
    HAWS & COMPANY..............................      6.54%            --
     Attn: Saundra L. Foe
     P.O. Box 5847
     Denver, CO 80217
<CAPTION>
   RESERVE CLASS
   -------------
   <S>                                           <C>            <C>
    BANK OF NEW YORK............................     99.89%            --
     Attn: Sheryl Covelli
     440 Mamoroneck, 5th Fl.
     Harrison, NY 10286
<CAPTION>
   RESOURCE CLASS
   --------------
   <S>                                           <C>            <C>
    FIRST UNION SECURITIES, INC. ...............     25.30%            --
     Attn: Money Funds
     8739 Research Drive
     Capital Markets
     Charlotte, NC 28262-0675
    HARRIS METHODIST HEALTH SYSTEM..............     18.95%            --
     Attn: Sandy Reeves
     600 East Las Colinas Blvd Ste 1550
     Irving, TX 75039
    CIBC WORLD MARKETS..........................     11.99%            --
     200 Liberty Street
     World Financial Center
     Attn: Lester Elson
     New York, NY 10281
    HAMBRECHT & QUIST LLC.......................     11.85%            --
     Attn: Matt Dermer
     230 Park Avenue, Floor 19
     New York, NY 10169
    MELLON BANK NA..............................      9.21%            --
     Attn: Cynthia Kieffer
     P.O. Box 710
     Pittsburgh, PA 15230-0710
    NVidia Corporation Cash Mgmt Account........      5.16%            --
     3535 Monroe Street
     Santa Clara, CA 95051
</TABLE>
- -------
(a) The Fund has no knowledge as to whether all or any portion of the shares
    of the class owned of record are also owned beneficially.

                                     A-13
<PAGE>

LIQUID ASSETS PORTFOLIO

  To the best of the knowledge of the Fund, the names and addresses of the
holders of 5% or more of the outstanding shares of each class of the Liquid
Assets Portfolio as of November 1, 1999, and the percentage of the Liquid
Assets Portfolio's outstanding shares owned by such shareholders as of such
date are as follows:

<TABLE>
<CAPTION>
                                                    PERCENT      PERCENT OWNED
                 NAME AND ADDRESS                   OWNED OF     OF RECORD AND
                  OF RECORD OWNER                RECORD ONLY(a) BENEFICIALLY(a)
                 ----------------                -------------- ---------------
   CASH MANAGEMENT CLASS
   ---------------------
   <S>                                           <C>            <C>
    CIBC WORLD MARKETS..........................     21.24%            --
     200 Liberty Street
     World Financial Center
     Attn: Lester Elson
     New York, NY 10281
    GATEWAY, INC. ..............................     16.65%            --
    Corp. Treasury/Y-15
     610 Gateway Drive
     N. Sioux City, SD 57049-2000
    BANK OF NEW YORK............................     10.70%            --
     One Wall Street
     5th Floor
     Stif/Master Note
     New York, NY 10286
    FIRST UNION SUBACCOUNTS.....................      6.58%            --
     8739 Research Drive
     Capital Markets
     Charlotte, NC 28262-0675
    HAMBRECHT & QUIST LLC.......................      6.47%            --
     Attn: Matt Dermer
     230 Park Avenue, Floor 19
     New York, NY 10169
    HARRIS TRUST & SAVINGS BANK.................      5.81%            --
     Attn: Rich Croll
     111 West Monroe St.
     Lower Level East
     Chicago, IL 60690
    SOUTHWEST BANK OF TEXAS, N.A. 498A1.........      5.00%            --
    Attn: Kathy Jensen
     4400 Post Oak Pkwy
     Houston, TX 77027
<CAPTION>
   INSTITUTIONAL CLASS
   -------------------
   <S>                                           <C>            <C>
    AIM FUND OF FUNDS ACCOUNT...................     26.95%            --
     Attn: Stacey Frakes
     Money Market Portfolio Admin.
     11 Greenway Plaza, Ste 100
     Houston, TX 77046
</TABLE>
- -------
(a) The Fund has no knowledge as to whether all or any portion of the shares
    of the class owned of record are also owned beneficially.

                                     A-14
<PAGE>

<TABLE>
<CAPTION>
                                                     PERCENT      PERCENT OWNED
                  NAME AND ADDRESS                   OWNED OF     OF RECORD AND
                  OF RECORD OWNER                 RECORD ONLY(a) BENEFICIALLY(a)
                  ----------------                -------------- ---------------
   <S>                                            <C>            <C>
    PAINE WEBBER SSB.............................      8.50%            --
     1000 Harbor Blvd 6th Floor
     Mutual Fund Operations
     State Street Custodial Accounts
     Weehawken, NJ 07087-6790
    TURTLE & CO SWEEP............................      7.53%            --
     Attn: Richard Ramer
     P.O. Box 9427
     Boston, MA 02209
    BZW BARCLAYS GLOBAL INVESTORS, AS AGENT......      7.45%            --
     Attn: Mike Futamase
     980 9th St. Suite 600
     Sacramento, CA 95814
<CAPTION>
   PERSONAL INVESTMENT CLASS
   -------------------------
   <S>                                            <C>            <C>
    HUNTINGTON INVESTMENT 112....................     83.03%            --
     135 North Pennsylvania Suite 800
     Indianapolis, IN 46204
    TEXAS CAPITAL BANK, N.A. ....................      9.61%            --
     Attn: Kitty Ramzy
     2100 McKinney Ave., Ste 900
     Dallas, TX 75201
<CAPTION>
   PRIVATE INVESTMENT CLASS
   ------------------------
   <S>                                            <C>            <C>
    BANK OF NEW YORK.............................     60.75%           --
     One Wall Street
     5th Floor
     Stif/Master Note
     New York, NY 10286
    MELLON BANK NA...............................     14.71%            --
     Attn: Cynthia Kieffer
     P.O. Box 710
     Pittsburgh, PA 15230-0710
    HUNTINGTON CAPITAL CORP......................     13.74%            --
     41 S. High St., Ninth Floor
     Columbus, OH 43287
<CAPTION>
   RESOURCE CLASS
   --------------
   <S>                                            <C>            <C>
    HAMBRECHT & QUIST LLC........................     52.50%            --
     Attn: Matt Dermer
     230 Park Avenue, Floor 19
     New York, NY 10169
    CIBC World Markets...........................     42.77%            --
     200 Liberty Street
     World Financial Center
     Attn: Lester Elson
     New York, NY 10281
</TABLE>
- -------
(a) The Fund has no knowledge as to whether all or any portion of the shares
    of the class owned of record are also owned beneficially.

 To the best of the knowledge of the Fund, as of November 1, 1999, the
directors and officers of the Fund as a group beneficially owned less than 1%
of each class of either Portfolio's outstanding shares.

                                     A-15
<PAGE>

                        SHARE PURCHASES AND REDEMPTIONS

PURCHASES AND REDEMPTIONS

  A complete description of the manner by which shares of a particular class
may be purchased or redeemed appears in each Prospectus under the headings
"Purchasing Shares" and "Redeeming Shares."

  Prior to the initial purchase of Portfolio shares, an investor must complete
and send an Account Application to AFS at P.O. Box 4497, Houston, Texas 77210-
4497. An Account Application may be obtained from the distributor. An investor
may make changes to the information provided in the Account Application by
submitting such changes in writing to the transfer agent or by completing and
submitting to the transfer agent a new Account Application.

  The Fund reserves the right to reject any purchase order and to withdraw all
or any part of the offering made by a Prospectus. Any funds received with
respect to an order which is not accepted by the Fund and any funds received
for which an order has not been received will be promptly returned to an
investor. Any request for correction to a transaction of Portfolio shares must
be submitted in writing to AFS. AFS reserves the right to reject any such
request. When a correction results in a dividend adjustment, the institution
must agree in writing to reimburse the Portfolio for any loss resulting from
the correction. Failure to deliver purchase proceeds on the requested
settlement date may result in a claim against the institution for an amount
equal to the overdraft charge incurred by the Portfolio. In the interest of
economy and convenience, certificates representing shares of the Class will
not be issued except upon written request to the Fund. Certificates (in full
shares only) will be issued without charge and may be redeposited at any time.

  An investor may terminate his relationship with an institution at any time,
in which case an account in the investor's name will be established directly
with the Portfolio and the investor will become a shareholder of record. In
such case, however, the investor will not be able to purchase additional
shares of the Cash Management Class, Personal Investment Class, Private
Investment Class, Reserve Class or the Resource Class directly, except through
reinvestment of dividends and distributions.

  Payment for redeemed shares of the Portfolio is normally made by Federal
Reserve wire to the commercial bank account designated in the shareholder's
Account Application on the day specified below, but may be remitted by check
upon request by a shareholder. A shareholder may change the bank account
designated to receive redemption proceeds by written notice to the Fund. The
authorized signature on the notice must be guaranteed by a commercial bank or
trust company (which may include the shareholder). Additional documentation
may be required when deemed appropriate by the Portfolio or AFS.

  The Fund may postpone the right of redemption only under unusual
circumstances, as allowed by the Securities and Exchange Commission, such as
when the New York Stock Exchange restricts or suspends trading.

  A "Business Day" of the Fund is any day on which member banks of the Federal
Reserve Bank of New York and The Bank of New York are open for business. If
AFS receives a redemption request on a Business Day prior to 4:00 p.m. Eastern
time, the redemption will be effected at the net asset value of the Portfolio
determined as of 4:00 p.m. Eastern time and the Fund will normally wire
redemption proceeds on that day. A redemption request received by AFS after
4:00 p.m. Eastern time will be effected at the net asset value of the
Portfolio determined as of 4:00 p.m. Eastern time on the next Business Day and
proceeds will normally be wired on the next Business Day. If proceeds are not
wired on the same day, shareholders will accrue dividends until the day the
proceeds are wired. The Fund, however, reserves the right to change the time
for which purchase and redemption orders must be submitted to and received by
the transfer agent for execution on the same day on any day when the primary
government securities dealers are either closed for business or close early,
or trading in money market securities is limited due to national holidays.

  Any request for correction to a redemption transaction of Portfolio shares
must be submitted in writing to AFS.

REDEMPTIONS BY THE FUND

  If the Fund determines that you have provided incorrect information in
opening an account or in the course of conducting subsequent transactions, the
Fund may, at its discretion, redeem the account and distribute the proceeds to
you.

  The Board of Directors may redeem shares if it determines in its sole
discretion that failure to so redeem may have materially adverse consequences
to the shareholders of the Portfolio.

NET ASSET VALUE DETERMINATION

  The net asset value per share of the Portfolio is determined as of 4:00 p.m.
Eastern time on each Business Day of the Fund. Shares of each class of the
Portfolio are sold at net asset value of such shares. Shareholders may at any
time redeem all or a portion of their shares at net asset value. The
investor's price for purchases and redemptions will be the net asset value
next determined following the receipt of an order to purchase or a request to
redeem shares.

                                     A-16
<PAGE>

  For the purpose of determining the price at which all shares of the
Portfolio are issued and redeemed, the net asset value per share is calculated
by: (a) valuing all securities and instruments of the Portfolio as set forth
below; (b) adding other assets of the Portfolio, if any; (c) deducting the
liabilities of the Portfolio; (d) dividing the resulting amount by the number
of shares outstanding of the Portfolio; and (e) rounding such per share net
asset value to the nearest whole cent. Among other items, the Portfolio's
liabilities include accrued expenses and dividends payable and its total
assets include portfolio securities valued at their market value as well as
income accrued but not yet received.

  The debt instruments held in the Portfolio are valued on the basis of
amortized cost. This method involves valuing an instrument at its cost and
thereafter assuming a constant amortization to maturity of any discount or
premium, regardless of the impact of fluctuating interest rates on the market
value of the instrument. While this method provides certainty in valuation, it
may result in periods during which value, as determined by amortized cost, is
higher or lower than the price the Fund would receive if it sold the entire
portfolio.

  The valuation of the portfolio instruments based upon their amortized cost
and the concomitant maintenance of the net asset value per share of $1.00 for
the Portfolio is permitted in accordance with applicable rules and regulations
of the SEC, including Rule 2a-7 under the 1940 Act, which require the
Portfolio to adhere to certain conditions. These rules require that the
Portfolio maintain a dollar-weighted average portfolio maturity of 90 days or
less, purchase only instruments having remaining maturities of 397 calendar
days or less and invest only in securities determined by the Board of
Directors to be "Eligible Securities" and to present minimal credit risk to
the Portfolio.

  The Board of Directors is required to establish procedures designed to
stabilize, to the extent reasonably practicable, the Portfolio's price per
share at $1.00 as computed for the purpose of sales and redemptions. Such
procedures include review of the Portfolio's holdings by the Board of
Directors, at such intervals as they may deem appropriate, to determine
whether the net asset value calculated by using available market quotations or
other reputable sources for the Portfolio deviates from $1.00 per share and,
if so, whether such deviation may result in material dilution or is otherwise
unfair to existing holders of the Portfolio's shares. In the event the Board
of Directors determines that such a deviation exists, it will take such
corrective action as the Board of Directors deems necessary and appropriate,
including the sales of portfolio instruments prior to maturity to realize
capital gains or losses or to shorten the average portfolio maturity; the
withholding of dividends; redemption of shares in kind; or the establishment
of a net asset value per share by using available market quotations.

DISTRIBUTION AGREEMENT

  The Fund has entered into a Master Distribution Agreement (the "Distribution
Agreement") with FMC, a registered broker-dealer and a wholly owned subsidiary
of AIM, to act as the exclusive distributor of the shares of each class of the
Portfolio. The address of FMC is 11 Greenway Plaza, Suite 100, Houston, Texas
77046-1173. See "General Information about the Fund--Directors and Officers"
and "General Information about the Fund -- Investment Advisor" for information
as to the affiliation of certain directors and officers of the Fund with FMC,
AIM and AIM Management.

  The Distribution Agreement provides that FMC has the exclusive right to
distribute the shares of each class of the Portfolio either directly or
through other broker-dealers. The Distribution Agreement also provides that
FMC will pay promotional expenses, including the incremental costs of printing
prospectuses and statements of additional information, annual reports and
other periodic reports for distribution to persons who are not shareholders of
the Portfolio and the costs of preparing and distributing any other
supplemental sales literature. FMC has not undertaken to sell any specified
number of shares of the Portfolio.

  The Distribution Agreement will continue from year to year provided that it
is specifically approved at least annually by the Fund's Board of Directors
and the affirmative vote of the directors who are not parties to the
Distribution Agreement or "interested persons" of any such party by votes cast
in person at a meeting called for such purpose. The Fund or FMC may terminate
the Distribution Agreement on 60 days' written notice without penalty. The
Distribution Agreement will terminate automatically in the event of its
"assignment," as defined in the 1940 Act.

  FMC may, from time to time, at its expense, pay a bonus or other
consideration or incentive to dealers or institutions who sell a minimum
dollar amount of the shares of a particular class during a specific period of
time. In some instances, these incentives may be offered only to certain
dealers or institutions who have sold or may sell significant amounts of
shares. The total amount of such additional bonus or payments or other
consideration shall not exceed 0.05% of the net asset value of the shares of
the class sold. Any such bonus or incentive programs will not change the price
paid by investors for the purchase of shares or the amount received as
proceeds from such sales. Dealers or institutions may not use sales of the
shares to qualify for any incentives to the extent that such incentives may be
prohibited by the laws of any jurisdiction.

DISTRIBUTION PLAN

  The Fund has adopted a Master Distribution Plan (the "Plan") pursuant to
Rule 12b-1 under the 1940 Act with respect to the Cash Management Class,
Personal Investment Class, Private Investment Class, Reserve Class and
Resource Class. The Plan provides that the Fund may compensate FMC in
connection with the distribution of shares of the Portfolio. Such compensation
may be expended when and if authorized by the Board of Directors and

                                     A-17
<PAGE>

may be used to finance such distribution-related services as expenses of
organizing and conducting sales seminars, printing of prospectuses and
statements of additional information (and supplements thereto) and reports for
other than existing shareholders, preparation and distribution of advertising
material and sales literature and costs of administering the Plan.

  Pursuant to the Plan, the Fund may enter into Shareholder Service Agreements
("Service Agreements") with selected broker-dealers, banks, other financial
institutions or their affiliates. Such firms may receive compensation from the
Portfolio for servicing investors as beneficial owners of the shares of the
Cash Management Class, Personal Investment Class, Private Investment Class,
Reserve Class and Resource Class of the Portfolio. These services may include
among other things: (i) answering customer inquiries regarding the shares of
these classes and the Portfolio; (ii) assisting customers in changing dividend
options, account designations and addresses; (iii) performing sub-accounting;
(iv) establishing and maintaining shareholder accounts and records; (v)
processing purchase and redemption transactions; (vi) automatic investment of
customer cash accounting balances in shares of these classes; (vii) providing
periodic statements showing a customer's account balance and integrating such
statements with those of other transactions and balances in the customer's
other accounts serviced by such firm; (viii) arranging for bank wires; and
(ix) such other services as the Fund may request on behalf of the shares of
these classes, to the extent such firms are permitted to engage in such
services by applicable statute, rule or regulation. The Plan may only be used
for the purposes specified above and as stated in the Plan. Expenses may not
be carried over from year to year.

  The Plan does not obligate the Fund to reimburse FMC for the actual expenses
FMC may incur in fulfilling its obligations under the Plan. Thus, even if
FMC's actual expenses exceed the fee payable to FMC thereunder at any given
time, the Fund will not be obligated to pay more than that fee. If FMC's
expenses are less than the fee it receives, FMC will retain the full amount of
the fee.

  FMC may from time to time waive or reduce any portion of its 12b-1 fee for
Cash Management Class, Personal Investment Class, Private Investment Class,
Reserve Class and Resource Class shares. Voluntary fee waivers or reductions
may be rescinded at any time without further notice to investors. During
periods of voluntary fee waivers or reductions, FMC will retain its ability to
be reimbursed for such fee prior to the end of each fiscal year. Contractual
fee waivers or reductions set forth in the Fee Table in a Prospectus may not
be terminated or amended to the Portfolio's detriment during the period stated
in the agreement between FMC and the Fund.

  The Plan requires the officers of the Fund to provide the Board of Directors
at least quarterly with a written report of the amounts expended pursuant to
the Plan and the purposes for which such expenditures were made. The Board of
Directors shall review these reports in connection with their decisions with
respect to the Plan.

  For the fiscal year ended August 31, 1999, FMC received compensation
pursuant to the Plan in the amount of $935,042, or an amount equal to 0.08% of
the average daily net assets of the Cash Management Class, $758,574, or an
amount equal to 0.50% of the average daily net assets of the Personal
Investment Class, $1,155,429, or an amount equal to 0.30% of the average daily
net assets of the Private Investment Class, $940,270, or an amount equal to
0.16% of the average daily net assets of the Resource Class, and $226,673, or
an amount equal to 0.80% of the average daily net assets of the Reserve Class.
With respect to the Cash Management Class, $935,042 of such amount (or an
amount equal to 0.08% of the average daily net assets of the class) was paid
to dealers and financial institutions and $0 (or an amount equal to 0% of the
average daily net assets of the class) was retained by FMC. With respect to
the Personal Investment Class, $629,436 of such amount (or an amount equal to
0.41% of the average daily net assets of the class) was paid to dealers and
financial institutions and $129,138 (or an amount equal to 0.09% of the
average daily net assets of the class) was retained by FMC. With respect to
the Private Investment Class, $996,003 of such amount (or an amount equal to
0.26% of the average daily net assets of the class) was paid to dealers and
financial institutions and $159,426 (or an amount equal to 0.04% of the
average daily net assets of the class) was retained by FMC. With respect to
the Resource Class, $938,600 of such amount (or an amount equal to 0.16% of
the average daily net assets of the class) was paid to dealers and financial
institutions and $1,670 (or an amount equal to 0% of the average daily net
assets of the class) was retained by FMC. With respect to the Reserve Class,
212,505 of such amount (or an amount equal to 0.50% of the average daily net
assets of the class) was paid to dealers and financial institutions and 14,168
(or an amount equal to 0.03% of the average daily net assets of the class) was
retained by FMC.

  As required by Rule 12b-1 under the 1940 Act, the Plan has been approved by
the Board of Directors, including a majority of the directors who are not
"interested persons" (as defined in the 1940 Act) of the Fund and who have no
direct or indirect financial interest in the operation of the Plan or in any
agreements related to the Plan ("Qualified Directors"). In approving the Plan
in accordance with the requirements of Rule 12b-1, the directors considered
various factors and determined that there is a reasonable likelihood that the
Plan would benefit the Fund and the holders of shares of the applicable
classes of the Portfolio. Anticipated benefits that may result from the Plan
are: (i) FMC, brokerage firms and financial institutions will provide a
shareholder with rapid access to his account for the purpose of effecting
executions of purchase and redemption orders; (ii) FMC and shareholder service
agents will provide prompt, efficient and reliable responses to shareholder
inquiries concerning account status; (iii) a well-developed, dependable
network of shareholder service agents may help to curb sharp fluctuations in
rates of redemptions and sales, thereby reducing the chance that an
unanticipated increase in net redemptions could adversely affect the
performance of the Portfolio; and (iv) a successful distribution effort will
assist FMC in maintaining and increasing the organizational strength needed to
service the Portfolio.

                                     A-18
<PAGE>

  The Plan, unless sooner terminated in accordance with its terms, shall
continue in effect as to each applicable class from year to year as long as
such continuance is specifically approved at least annually by the Board of
Directors, including a majority of the Qualified Directors.

  FMC is a wholly owned subsidiary of AIM, an indirect wholly owned subsidiary
of AMVESCAP PLC. Charles T. Bauer, a Director and Chairman of the Fund and
Robert H. Graham, a Director and President of the Fund, own shares of AMVESCAP
PLC.

  The Plan may be terminated as to a particular class of the portfolio by vote
of a majority of the Qualified Directors, or by vote of a majority of the
holders of the outstanding voting securities of such class. Any change in the
Plan that would increase materially the distribution expenses paid by an
applicable class requires shareholder approval; otherwise, the Plan may be
amended by the directors, including a majority of the Qualified Directors, by
vote cast in person at a meeting called for the purpose of voting upon such
amendment. As long as the Plan is in effect, the selection or nomination of
the Qualified Directors is committed to the discretion of the Qualified
Directors.

  The Plan complies with the Conduct Rules of the National Association of
Securities Dealers, Inc. and provides for payment of a service fee to dealers
and other financial institutions that provide continuing personal shareholder
services to their customers who purchase and own shares of each applicable
class of the Portfolio, in amounts of up to 0.25% of the average net assets of
such class of the Portfolio attributable to the customers of such dealers or
financial institutions. Payments to dealers and other financial institutions
in excess of such amount and payments to FMC would be characterized as an
asset-based sales charge pursuant to the amended Plan. The Plan also imposes a
cap on the total amount of sales charges, including asset-based sales charges,
that may be paid by the Portfolio with respect to each applicable class.

  During the fiscal years ended August 31, 1999, 1998 and 1997 AIM voluntarily
waived fees with respect to the Portfolio in the amount of $1,675,069,
$1,154,715 and $851,042, respectively.

BANKING REGULATIONS

  The Glass-Steagall Act and other applicable laws or regulations, among other
things, generally prohibit federally chartered or supervised banks from
engaging in the business of underwriting, selling or distributing securities,
but permit banks to make shares of mutual funds available to their customers
and to perform administrative and shareholder servicing functions. However,
judicial or administrative decisions or interpretations of such laws, as well
as changes in either federal or state statutes or regulations relating to the
permissible activities of banks or their subsidiaries or affiliates, could
prevent a bank from continuing to perform all or a part of its servicing
activities. If a bank were prohibited from so acting, shareholder clients of
such bank would be permitted to remain shareholders of the Fund and alternate
means for continuing the servicing of such shareholders would be sought. In
such event, changes in the operation of the Fund might occur and shareholders
serviced by such bank might no longer be able to avail themselves of any
automatic investment or other services then being provided by such bank. It is
not expected that shareholders would suffer any adverse financial consequences
as a result of any of these occurrences. In addition, state securities laws on
this issue may differ from the interpretations of federal law expressed herein
and certain banks and financial institutions may be required to register as
dealers pursuant to state law.

PERFORMANCE INFORMATION

  As stated under the caption "Performance Information--Performance Table" in
each Prospectus, yield information for the shares of each class of the
Portfolio may be obtained by calling the Fund at the telephone number set
forth in the Prospectus for that class. Performance will vary from time to
time and past results are not necessarily indicative of future results.
Investors should understand that performance is a function of the type and
quality of the Portfolio's investments as well as its operating expenses.
Performance information for the shares of the Portfolio may not provide a
basis for comparison with investments which pay fixed rates of interest for a
stated period of time, with other investments or with investment companies
which use a different method of calculating performance.

  Calculations of yield will take into account the total income received by
the Portfolio. To the extent that different classes of shares bear different
expenses, the yields of such classes will vary. To the extent that
institutions charge fees in connection with services provided in conjunction
with the Fund, the yield will be lower for those beneficial owners paying such
fees.

  The current yields quoted will be the net average annualized yield for an
identified period, such as seven consecutive calendar days or a month. Yields
will be computed by assuming that an account was established with a single
share (the "Single Share Account") on the first day of the period. To arrive
at the quoted yield, the net change in the value of that Single Share Account
for the period (which would include dividends accrued with respect to the
share, and dividends declared on shares purchased with dividends accrued and
paid, if any, but would not include any realized gains and losses or
unrealized appreciation or depreciation and income other than investment
income) will be multiplied by 365 and then divided by the number of days in
the period, with the resulting figure carried to the nearest hundredth of one
percent. The Fund may also furnish a quotation of effective yields that
assumes the reinvestment of dividends for a 365 day year and a return for the
entire year equal to the average annualized yields for the period, which will
be computed by compounding the unannualized current yields for the period by
adding 1 to the unannualized current yields, raising the sum to a power equal
to 365 divided by the number of days in the period, and then subtracting 1
from the result.

                                     A-19
<PAGE>

  From time to time, AIM or its affiliates may waive all or a portion of their
fees and/or assume certain expenses of the Portfolio. Voluntary fee waivers or
reductions or commitments to assume expenses may be rescinded at any time
without further notice to investors. During periods of voluntary fee waivers
or reductions or commitments to assume expenses, AIM will retain its ability
to be reimbursed for such fee prior to the end of each fiscal year.
Contractual fee waivers or reductions or reimbursement of expenses set forth
in the Fee Table in a Prospectus may not be terminated or amended to the
Portfolio's detriment during the period stated in the agreement between AIM
and the Fund. Fee waivers or reductions or commitments to reduce expenses will
have the effect of the increasing Portfolio's yield and total return.

  For the seven-day period ended August 31, 1998, the current yield and the
effective yield (which assumes the reinvestment of dividends for a 365-day
year and a return for the entire year equal to the annualized current yield
for the period) were 5.17% and 5.30%, for the Cash Management Class, were
5.25% and 5.38%, for the Institutional Class, were 4.75% and 4.86%, for the
Personal Investment Class, were 4.95% and 5.07%, for the Private Investment
Class, were 4.44% and 4.54%, for the Reserve Class and were 5.09% and 5.21%,
for the Resource Class, respectively. These yields are quoted for illustration
purposes only. The yields for any other seven-day period may be substantially
different from the yields quoted above.

  The Portfolio may compare the performance of a particular class or the
performance of securities in which it may invest to:

    . IBC/Donoghue's Money Fund Averages, which are average yields of various
  types of money market funds that include the effect of compounding
  distributions;

    . other mutual funds, especially those with similar investment objectives.
  These comparisons may be based on data published by IBC/Donoghue's Money
  Fund Report--Registered Trademark--of Holliston, Massachusetts or by Lipper
  Inc., a widely recognized independent service located in Summit, New Jersey,
  which monitors the performance of mutual funds;

    . yields on other money market securities or averages of other money
  market securities as reported by the Federal Reserve Bulletin, by TeleRate,
  a financial information network, or by Bloomberg, a financial information
  firm; and

    . other fixed-income investments such as Certificates of Deposit ("CDs").

  The principal value and interest rate of CDs and money market securities are
fixed at the time of purchase whereas the yield of a class will fluctuate.
Unlike some CDs and certain other money market securities, money market mutual
funds are not insured by the FDIC. Investors should give consideration to the
quality and maturity of the portfolio securities of the respective investment
companies when comparing investment alternatives.

  The Portfolio may reference the growth and variety of money market mutual
funds and AIM's innovation and participation in the industry.

REDEMPTIONS IN KIND

  The Portfolio will not redeem shares representing an interest in the
Portfolio in kind (i.e. by distributing its portfolio securities).

                      INVESTMENT PROGRAM AND RESTRICTIONS

INVESTMENT PROGRAM

  Information concerning the Portfolio's investment objective and operating
policies is set forth in each Prospectus. The principal features of the
Portfolio's investment program and the primary risks associated with that
investment program are also discussed in each Prospectus. There can be no
assurance that the Portfolio will achieve its objective. The values of the
securities in which the Portfolio invests fluctuate based upon interest rates,
the financial stability of the issuer and market factors. The following is a
more detailed description of the portfolio instruments eligible for purchase
by the Portfolio, which augments the summary of the Portfolio's investment
program which appears under the heading "Investment Objective and Strategies"
in each Prospectus.

  The Portfolio may invest in certificates of deposit ("Eurodollar CDs") and
time deposits ("Eurodollar time deposits") of foreign branches of domestic
banks having total assets of $1.5 billion as of the date of their most
recently published financial statements. Accordingly, an investment in the
Portfolio may involve risks that are different in some respects from those
incurred by an investment company which invests only in debt obligations of
U.S. domestic issuers. Such risks include future political and economic
developments, the possible seizure or nationalization of foreign deposits, the
possible imposition of United Kingdom withholding taxes on interest income
payable on Eurodollar CDs or Eurodollar time deposits, and the possible
establishment of exchange controls or the adoption of other foreign
governmental restrictions which might adversely affect the payment of
principal and interest on Eurodollar CDs and Eurodollar time deposits.

  Rule 2a-7 under the 1940 Act provides that a money market fund shall not
invest more than 5% of its total assets in securities issued by a single
issuer, provided that such a fund may invest more than 5% of its total assets
in the First Tier securities of a single issuer for a period of up to 3
business days after the purchase thereof if the money market fund is a
diversified investment company, provided further, that the fund may not make
more than

                                     A-20
<PAGE>

one investment in accordance with the foregoing proviso at any time. Under
Rule 2a-7, for purposes of determining the percentage of a fund's total assets
that are invested in securities of an issuer, a repurchase agreement shall be
deemed to be an acquisition of the underlying securities, provided that the
obligation of the seller to repurchase the securities from the money market
fund is fully collateralized. To be fully collateralized, the collateral must,
among other things, consist entirely of U.S. Government securities or
securities that, at the time the repurchase agreement is entered into, are
rated in the highest rating category by the Requisite NRSROs. The term
"Requisite NRSROs" means (a) any two nationally recognized statistical rating
organizations ("NRSROs") that have issued a rating with respect to a security
or class of debt obligations of an issuer, or (b) if only one NRSRO has issued
a rating with respect to such security or issuer at the time the Portfolio
acquires the security, that NRSRO.

  The Portfolio may also lend its portfolio securities in amounts up to 33
1/3% of its total assets to financial institutions in accordance with the
investment restrictions of the Portfolio. Such loans would involve risks of
delay in receiving additional collateral in the event the value of the
collateral decreased below the value of the securities loaned or of delay in
recovering the securities loaned or even loss of rights in the collateral
should the borrower of the securities fail financially. However, loans will be
made only to borrowers deemed by AIM to be of good standing and only when, in
AIM's judgment, the income to be earned from the loans justifies the attendant
risks.

INVESTMENT POLICIES

  The Portfolio may invest in a broad range of government, bank and commercial
obligations and taxable municipal securities that may be available in the
money markets. Such obligations are collectively referred to as "Money Market
Obligations" and include U.S. Treasury obligations, which include Treasury
bills, notes and bonds, and repurchase agreements relating to such securities.
The Portfolio may also engage in certain investment practices described below.

 Money Market Obligations

  The following list of descriptions illustrates the types of Money Market
Obligations in which the Portfolio intends to invest. The list does not
purport to be an exhaustive list of all Money Market Obligations, and the
Portfolio reserves the right to invest in Money Market Obligations other than
those listed below.

  COMMERCIAL INSTRUMENTS. The Portfolio intends to invest in commercial
instruments, including commercial paper, master notes and other short-term
corporate instruments, that are denominated in U.S. dollars and which at the
date of purchase are "First Tier" securities as defined in Rule 2a-7 under the
1940 Act as such Rule may be amended from time to time. Briefly, "First Tier"
securities are securities that are rated in the highest rating category for
short-term debt obligations by two NRSROs or, if only rated by one NRSRO, are
rated in the highest rating category by that NRSRO, or, if unrated, are
determined by the Portfolio's investment advisor (under the supervision of and
pursuant to guidelines established by the Board of Directors) to be of
comparable quality to a rated security that meets the foregoing quality
standards, as well as securities issued by a registered investment company
that is a money market fund and U.S. government securities. Commercial paper
consists of short-term promissory notes issued by corporations. Commercial
paper may be traded in the secondary market after its issuance. Master notes
are demand notes that permit the investment of fluctuating amounts of money at
varying rates of interest pursuant to arrangements with issuers who meet the
quality criteria of the Portfolio. The interest rate on a master note may
fluctuate based upon changes in specified interest rates or be reset
periodically according to a prescribed formula or may be a set rate. Although
there is no secondary market in master demand notes, if such notes have a
demand feature, the payee may demand payment of the principal amount of the
note upon relatively short notice.

  REPURCHASE AGREEMENTS. The Portfolio intends to invest in repurchase
agreements with banks and broker-dealers pertaining to the securities
described above. A repurchase agreement is an instrument under which the
Portfolio acquires ownership of a debt security and the seller agrees, at the
time of sale, to repurchase the obligation at a mutually agreed-upon time and
price, thereby determining the yield during the Portfolio's holding period.
Repurchase transactions are limited to a term not to exceed 365 days. The
Portfolio may enter into repurchase agreements only with institutions believed
by the Fund's Board of Directors to present minimal credit risk. With regard
to repurchase transactions, in the event of a bankruptcy or other default of a
seller of a repurchase agreement (such as the seller's failure to repurchase
the obligation in accordance with the terms of the agreement), the Portfolio
could experience both delays in liquidating the underlying securities and
losses, including: (a) a possible decline in the value of the underlying
security during the period while the Portfolio seeks to enforce its rights
thereto, (b) possible subnormal levels of income and lack of access to income
during this period, and (c) expenses of enforcing its rights. Repurchase
agreements are considered to be loans by the Portfolio under the 1940 Act.
Repurchase agreements will be secured by securities eligible under Rule 2a-7
of the 1940 Act.

  GOVERNMENT OBLIGATIONS. The Portfolio may invest in securities issued or
guaranteed as to principal and interest by the U.S. Government or by its
agencies or instrumentalities. Such obligations may be supported (a) by the
full faith and credit of the U.S. Treasury (as in the case of Government
National Mortgage Association Certificates), (b) by the right of the issuer to
borrow from the U.S. Treasury (as in the case of obligations of the Federal
Home Loan Bank), (c) by discretionary authority of the U.S. Government to
purchase certain obligations of the agency or instrumentality (as in the case
of the Federal National Mortgage Association), or (d) only by the credit of
the agency or instrumentality itself (as in the case of obligations of the
Student Loan Marketing Association). No assurance can be given that the U.S.
Government will provide financial support to such U.S. Government sponsored
agencies or instrumentalities in the future and it is not obligated to do so
by law.

                                     A-21
<PAGE>

  BANK INSTRUMENTS. The Portfolio may invest in certificates of deposits
("CDs"), time deposits and bankers' acceptances of domestic commercial banks
having total assets in excess of $1.5 billion as of the date of their most
recently published financial statements and CDs of other domestic banks that
are fully insured as to principal by the Federal Deposit Insurance
Corporation. CDs represent short-term interest-bearing deposits of commercial
banks against which negotiable certificates bearing stated rates of interest
are issued. Bankers' acceptances are short-term negotiable drafts endorsed by
commercial banks which arise primarily from international commercial
transactions.

  The Portfolio may invest in certificates of deposit ("Eurodollar CDs") and
time deposits ("Eurodollar time deposits") of foreign branches of domestic
banks having total assets in excess of $1.5 billion as of the date of their
most recently published financial statements. Time deposits are non-negotiable
deposits maintained in a banking institution for a specified period of time at
a stated interest rate. The Portfolio will not make any time or savings
deposit if, immediately after making such deposit, over 5% of the Portfolio's
total assets would be invested in time and savings deposits.

 Investment Practices

  BORROWING MONEY/REVERSE REPURCHASE AGREEMENTS. The Portfolio may borrow
money and enter into reverse repurchase agreements with respect to its
portfolio securities in amounts up to 10% of the value of its total assets at
the time of borrowing or entering into a reverse repurchase agreement. Reverse
repurchase agreements involve the sale by the Portfolio of a portfolio
security at an agreed-upon price, date and interest payment. The Portfolio
will borrow money or enter into reverse repurchase agreements solely for
temporary or defensive purposes, such as to facilitate the orderly sale of
portfolio securities or to accommodate abnormally heavy redemption requests
should they occur. Reverse repurchase transactions are limited to a term not
to exceed 92 days. The Portfolio will use reverse repurchase agreements when
the interest income to be earned from the securities that would otherwise have
to be liquidated to meet redemption requests is greater than the interest
expense of the reverse repurchase transaction. The Portfolio will give
shareholders notice of its intent to enter into a reverse repurchase agreement
in sufficient time to permit shareholder redemptions before the Portfolio
enters into any reverse repurchase agreements. Reverse repurchase agreements
involve the risk that the market value of securities retained by the Portfolio
in lieu of liquidation may decline below the repurchase price of the
securities sold by the Portfolio which it is obligated to repurchase. The
risk, if encountered, could cause a reduction in the net asset value of the
Portfolio's shares. Reverse repurchase agreements are considered to be
borrowings by the Portfolio under the 1940 Act.

  LENDING OF PORTFOLIO SECURITIES. The Portfolio may also lend its portfolio
securities in amounts up to 33 1/3% of its total assets to financial
institutions in accordance with the investment restrictions of the Portfolio.
Such loans would involve risks of delay in receiving additional collateral in
the event the value of the collateral decreased below the value of the
securities loaned or of delay in recovering the securities loaned or even loss
of rights in the collateral should the borrower of the securities fail
financially. However, loans will be made only to borrowers deemed by AIM to be
of good standing and only when, in AIM's judgment, the income to be earned
from the loans justifies the attendant risks.

  PURCHASING DELAYED DELIVERY AND WHEN-ISSUED SECURITIES. The Portfolio may
enter into delayed agreements and may purchase securities on a "when-issued"
basis.

  Delayed delivery agreements are commitments by the Portfolio to dealers or
issuers to acquire securities beyond the customary settlement date for such
securities. These commitments fix the payment price and interest rate to be
received on the investment. Delayed delivery agreements will not be used as a
speculative or leverage technique. Rather, from time to time, the Portfolio's
investment advisor can anticipate that cash for investment purposes will
result from scheduled maturities of existing portfolio instruments or from net
sales of shares of the Portfolio and may enter into delayed delivery
agreements to assure the Portfolio will be as fully invested as possible in
instruments meeting its investment objective.

  Debt securities are sometimes offered on a "when-issued" basis; that is, the
date for delivery of and payment for the securities is not fixed at the date
of purchase, but is set after the securities are issued (normally within
forty-five days after the date of the transaction). The payment obligation and
the interest rate that will be received on the securities are fixed at the
time the buyer enters into the commitment. The Portfolio will only make
commitments to purchase such debt securities with the intention of actually
acquiring the securities, but the Portfolio may sell these securities before
the settlement date if it is deemed advisable.

  If the Portfolio enters into a delayed delivery agreement or purchases a
when-issued security, the Portfolio will direct its custodian bank to
segregate liquid assets (including Money Market Obligations) in an amount
equal to its delayed delivery agreements or when-issued commitments. If the
market value of such securities declines, additional cash or securities will
be segregated on a daily basis so that the market value of the account will
equal the amount of the Portfolio's delayed delivery agreements and when-
issued commitments. To the extent that funds are segregated, they will not be
available for new investment or to meet redemptions. Investment in securities
on a when-issued basis and use of delayed delivery agreements may increase the
Portfolio's exposure to market fluctuation, or may increase the possibility
the Portfolio will incur a short-term loss, if the Portfolio must engage in
portfolio transactions in order to honor a when-issued commitment or accept
delivery of a security under a delayed delivery agreement. The Portfolio will
employ techniques designed to minimize these risks. No additional delayed
delivery agreements or when-issued commitments will be made by the Portfolio
if, as a result, more than 25% of the Portfolio's net assets would become so
committed.

  ILLIQUID SECURITIES. The Portfolio will invest no more than 10% of its net
assets in illiquid securities.

                                     A-22
<PAGE>

  INVESTMENT IN OTHER INVESTMENT COMPANIES. The Portfolio may invest in other
investment companies to the extent permitted by the 1940 Act, and rules and
regulations thereunder, and, if applicable, exemptive orders granted by the
SEC.

ELIGIBLE SECURITIES

  The Fund will invest in "Eligible Securities" as defined in Rule 2a-7 under
the 1940 Act, which the Fund's Board of Directors has determined to present
minimal credit risk.

COMMERCIAL PAPER RATINGS

  Commercial paper is a term used to designate unsecured short-term promissory
notes issued by corporations and other entities. Maturities on these issues
vary from a few days to nine months. The following is a description of the
factors underlying the commercial paper ratings of Moody's Investors Service
("Moody's"), Standard & Poor's Rating Services ("S&P") and Fitch IBCA, Inc.
("Fitch").

  Moody's--The rating Prime-1 (P-1) is the highest commercial paper rating
assigned by Moody's. Among the factors considered by Moody's in assigning
ratings are the following: (1) evaluation of the management of the issuer; (2)
economic evaluation of the issuer's industry or industries and an appraisal of
speculative-type risks which may be inherent in certain areas; (3) evaluation
of the issuer's products in relation to competition and customer acceptance;
(4) liquidity; (5) amount and quality of long-term debt; (6) trend of earnings
over a period of ten years; (7) financial strength of a parent company and the
relationship which exists with the issuer; and (8) recognition by the
management of obligations which may be present or may arise as a result of
public interest questions and preparations to meet such obligations. These
factors are all considered in determining whether the commercial paper is
rated P-1, P-2 or P-3.

  S&P--Commercial paper rated A-1 by S&P has the following characteristics.
Liquidity ratios are adequate to meet cash requirements. Long-term senior debt
is rated "A" or better, although in some cases "BBB" credits may be allowed.
The issuer has access to at least two additional channels of borrowing. Basic
earnings and cash flow have an upward trend with allowance made for unusual
circumstances. Typically, the issuer's industry is well established and the
issuer has a strong position within the industry. The reliability and quality
of management is unquestioned. The relative strength or weakness of the above
factors determine whether the issuer's commercial paper is rated A-1, A-2 or
A-3.

  Fitch--Fitch's short-term rating has a time horizon of less than 12 months
for most obligations, or up to three years for U.S. public finance securities,
and thus places greater emphasis on the liquidity necessary to meet financial
commitments in a timely manner.

                                      F-1

  Highest credit quality. Indicates the strongest capacity for timely payment
of financial commitments; may have an added "+" to denote any exceptionally
strong credit feature.

                                      F-2

  Good credit quality. A satisfactory capacity for timely payment of financial
commitments, but the margin of safety is not as great as in the case of the
highest ratings.

                             PLUS(+) AND MINUS (-)

  Plus and minus signs may be appended to a rating to denote relative status
within major rating categories. Such suffixes are not added to the "AAA" long-
term rating category, to categories below "CCC", or to short-term ratings
other than "F-1."

                                      LOC

  The symbol LOC indicates that the rating is based on a letter of credit
issued by a commercial bank.

BOND RATINGS

  The following is a description of the factors underlying the bond ratings of
Moody's, S&P and Fitch.

  MOODY'S--The following are the two highest bond ratings of Moody's.

                                     A-23
<PAGE>

                                      AAA

  Bonds which are rated Aaa are judged to be of the best quality. They carry
the smallest degree of investment risk and are generally referred to as "gilt
edge." Interest payments are protected by a large or exceptionally stable
margin and principal is secure. While the various protective elements are
likely to change, such changes as can be visualized are most unlikely to
impair the fundamentally strong position of such issues.

                                      AA

  Bonds which are rated Aa are judged to be of high quality by all standards.
Together with the Aaa group they comprise what are generally known as high
grade bonds. They are rated lower than the best bonds because margins of
protection may not be as large as Aaa securities or fluctuation of protective
elements may be of greater amplitude or there may be other elements present
which make the long term risks appear somewhat larger than in Aaa securities.

  S&P--The following are the two highest bond ratings of S&P.

                                      AAA

  Bonds rated AAA are the highest grade obligations. They possess the ultimate
degree of protection as to principal and interest. Market values of bonds
rated AAA move with interest rates, and hence provide the maximum safety on
all counts.

                                      AA

  Bonds rated AA also qualify as high grade obligations, and in the majority
of instances differ from AAA issues only in small degree. Here, too, prices
move with the long-term money market.

  FITCH--Fitch investment grade bond ratings provide a guide to investors in
determining the credit risk associated with a particular security. The ratings
represent Fitch's assessment of the issuer's ability to meet the obligations
of a specific debt issue or class of debt in a timely manner.

  The rating takes into consideration special features of the issue, its
relationship to other obligations of the issuer, the current and prospective
financial condition and operating performance of the issuer and any guarantor,
as well as the economic and political environment that might affect the
issuer's future financial strength and credit quality.

  Fitch ratings do not reflect any credit enhancement that may be provided by
insurance policies or financial guarantees unless otherwise indicated.

  Bonds that have the same rating are of similar but not necessarily identical
credit quality since the rating categories do not fully reflect small
differences in the degrees of credit risk.

  Fitch ratings are not recommendations to buy, sell or hold any security.
Ratings do not comment on the adequacy of market price, the suitability of any
security for a particular investor, or the tax-exempt nature or taxability of
payments made in respect of any security.

  Fitch ratings are based on information obtained from issuers, other
obligors, underwriters, their experts, and other sources Fitch believes to be
reliable. Fitch does not audit or verify the truth or accuracy of such
information. Ratings may be changed, suspended, or withdrawn as a result of
changes in, or the unavailability of, information or for other reasons.

                                      AAA

  Highest credit quality. "AAA" ratings denote the lowest expectation of
credit risk. They are assigned only in case of exceptionally strong capacity
for timely payment of financial commitments. This capacity is highly unlikely
to be adversely affected by foreseeable events.

                                      AA

  Very high credit quality. "AA" ratings denote a very low expectation of
credit risk. They indicate very strong capacity for timely payment of
financial commitments. This capacity is not significantly vulnerable to
foreseeable events.

                                     A-24
<PAGE>

INVESTMENT RESTRICTIONS

  As a matter of fundamental policy which may not be changed without the
approval of the holders of a majority of the outstanding shares of the
Portfolio (as that term is defined under "General Information about the Fund--
The Fund and its Shares"), the Portfolio may not:

    (1) concentrate 25% or more of the value of its total assets in the
  securities of one or more issuers conducting their principal business
  activities in the same industry, provided that there is no limitation with
  respect to investments in obligations issued or guaranteed by the U.S.
  Government, its agencies or instrumentalities and bank instruments, such as
  CDs, bankers' acceptances, time deposits and bank repurchase agreements;

    (2) purchase securities of any one issuer (other than obligations of the
  U.S. Government, its agencies or instrumentalities) if, immediately after
  such purchase, more than 5% of the value of the Portfolio's total assets
  would be invested in such issuer, except as permitted by Rule 2a-7 under the
  1940 Act, as amended from time to time, and except that the Portfolio may
  purchase securities of other investment companies to the extent permitted by
  applicable law or exemptive order;

    (3) borrow money or issue senior securities except (a) for temporary or
  emergency purposes (e.g., in order to facilitate the orderly sale of
  portfolio securities to accommodate abnormally heavy redemption requests),
  the Portfolio may borrow money from banks or obtain funds by entering into
  reverse repurchase agreements, and (b) to the extent that entering into
  commitments to purchase securities in accordance with the Portfolio's
  investment program may be considered the issuance of senior securities,
  provided that the Portfolio will not purchase portfolio securities while
  borrowings in excess of 5% of its total assets are outstanding;

    (4) mortgage, pledge or hypothecate any assets except to secure permitted
  borrowings and except for reverse repurchase agreements and then only in an
  amount up to 33 1/3% of the value of its total assets at the time of
  borrowing or entering into a reverse repurchase agreement;

    (5) make loans of money or securities other than (a) through the purchase
  of debt securities in accordance with the Portfolio's investment program,
  (b) by entering into repurchase agreements and (c) by lending portfolio
  securities to the extent permitted by law or regulation;

    (6) underwrite securities issued by any other person, except to the extent
  that the purchase of securities and the later disposition of such securities
  in accordance with the Portfolio's investment program may be deemed an
  underwriting;

    (7) invest in real estate, except that the Portfolio may purchase and sell
  securities secured by real estate or interests therein or issued by issuers
  which invest in real estate or interests therein;

    (8) purchase or sell commodities or commodity futures contracts, purchase
  securities on margin, make short sales or invest in puts or calls; or

    (9) invest in any obligation not payable as to principal and interest in
  United States currency.

  The following investment policy is not fundamental and may be changed by the
Board of Directors of the Fund without shareholder approval. The Portfolio
does not intend to invest in companies for the purpose of exercising control
or management, except that the Portfolio may purchase securities of other
investment companies to the extent permitted by the 1940 Act, and rules and
regulations thereunder, and if applicable, exemptive orders granted by the
SEC. The Fund has obtained an exemptive order from the SEC allowing it to
invest in money market funds that have AIM or an affiliate of AIM as an
investment adviser (the "Affiliated Money Market Fund"), provided that
investments in Affiliated Money Market Funds do not exceed 25% of the total
assets of the Portfolio. If other funds advised by AIM invest in the
Portfolio, however, the Portfolio will be subject to the provisions of Section
12(d)(1) of the 1940 Act, which limits the ability of an investment company to
invest in another investment company. With respect to the Portfolio's purchase
of shares of the Affiliated Money Market Funds, the Portfolio will indirectly
pay the advisory fees and other operating expenses of the Affiliated Money
Market Funds.

                     PORTFOLIO TRANSACTIONS AND BROKERAGE

GENERAL BROKERAGE POLICY

  AIM makes decisions to buy and sell securities for the Portfolio, selects
broker-dealers, effects the Portfolio's investment portfolio transactions,
allocates brokerage fees in such transactions, and where applicable,
negotiates commissions and spreads on transactions. Since purchases and sales
of portfolio securities by the Portfolio are usually principal transactions,
the Portfolio incurs little or no brokerage commissions. AIM's primary
consideration in effecting a security transaction is to obtain the most
favorable execution of the order, which includes the best price on the
security and a low commission rate (as applicable). While AIM seeks reasonable
competitive commission rates, the Portfolio may not pay the lowest commission
or spread available. See "Section 28(e) Standards" below.

                                     A-25
<PAGE>

  In the event the Portfolio purchases securities traded in over-the-counter
markets, the Portfolio deals directly with dealers who make markets in the
securities involved, except when better prices are available elsewhere.
Portfolio transactions placed through dealers who are primary market makers
are effected at net prices without commissions, but which include compensation
in the form of a mark up or mark down.

  AIM may determine target levels of commission business with various brokers
on behalf of its clients (including the Portfolio) over a certain time period.
The target levels will be based upon the following factors, among others: (1)
the execution services provided by the broker; (2) the research services
provided by the broker; and (3) the broker's interest in mutual funds in
general and in the Portfolio and other mutual funds advised by AIM or A I M
Capital Management, Inc. (collectively, the "AIM Funds") in particular,
including sales of the Portfolio and of the other AIM Funds. In connection
with (3) above, the Portfolio's trades may be executed directly by dealers
which sell shares of the AIM Funds or by other broker-dealers with which such
dealers have clearing arrangements. AIM will not use a specific formula in
connection with any of these considerations to determine the target levels.

  AIM will seek, whenever possible, to recapture for the benefit of a
Portfolio any commissions, fees, brokerage or similar payments paid by the
Portfolio on portfolio transactions. Normally, the only fees which AIM can
recapture are the soliciting dealer fees on the tender of the Portfolio's
securities in a tender or exchange offer.

  The Portfolio may engage in certain principal and agency transactions with
banks and their affiliates that own 5% or more of the outstanding voting
securities of the Portfolio provided the conditions of an exemptive order
received by the Portfolio from the SEC are met. In addition, the Portfolio may
purchase or sell a security from or to another AIM Fund provided the Portfolio
follows procedures adopted by the Board of Directors/Trustees of the various
AIM Funds, including the Fund. These inter-fund transactions do not generate
brokerage commissions but may result in custodial fees or taxes or other
related expenses.

  The Portfolio does not seek to profit from short-term trading, and will
generally (but not always) hold portfolio securities to maturity, but AIM may
seek to enhance the yield of the Portfolio by taking advantage of yield
disparities or other factors that occur in the money markets. For example,
market conditions frequently result in similar securities trading at different
prices. AIM may dispose of any portfolio security prior to its maturity if
such disposition and reinvestment of proceeds are expected to enhance yield
consistent with AIM's judgment as to desirable portfolio maturity structure or
if such disposition is believed to be advisable due to other circumstances or
conditions. The amortized cost method of valuing portfolio securities requires
that the Portfolio maintain an average weighted portfolio maturity of ninety
days or less. Thus, there is likely to be relatively high portfolio turnover,
but since brokerage commissions are not normally paid on money market
instruments, the high rate of portfolio turnover is not expected to have a
material effect on the net income or expenses of the Portfolio. The
Portfolio's policy of investing in securities with maturities of 397 days or
less will result in high portfolio turnover. Since brokerage commissions are
not normally paid on investments of the type made by the Portfolio, the high
turnover rate should not adversely affect the Portfolio's net income.

ALLOCATION OF PORTFOLIO TRANSACTIONS

  AIM and its affiliates manage several other investment accounts. Some of
these accounts may have investment objectives similar to the Portfolio.
Occasionally, identical securities will be appropriate for investment by the
Portfolio and by another fund or one or more of these investment accounts.
However, the position of each account in the same securities and the length of
time that each account may hold its investment in the same securities may
vary. The timing and amount of purchase by each account will also be
determined by its cash position. If the purchase or sale of securities is
consistent with the investment policies of the Portfolio and one or more of
these accounts, and is considered at or about the same time, AIM will fairly
allocate transactions in such securities among the Portfolio and these
accounts. AIM may combine such transactions, in accordance with applicable
laws and regulations, to obtain the most favorable execution. Simultaneous
transactions could, however, adversely affect the Portfolio's ability to
obtain or dispose of the full amount of a security which it seeks to purchase
or sell.

  Sometimes the procedure for all allocating portfolio transactions among the
various investment accounts advised by AIM could have an adverse effect on the
price or amount of securities available to the Portfolio. In making such
allocations, AIM considers the investment objectives and policies of its
advisory clients, the relative size of portfolio holdings of the same or
comparable securities, the availability of cash for investment, the size of
investment commitments generally held, and the judgments of the persons
responsible for recommending the investment.

SECTION 28(e) STANDARDS

  Section 28(e) of the Securities Exchange Act of 1934 provides that AIM,
under certain circumstances, lawfully may cause an account to pay a higher
commission than the lowest available. Under Section 28(e), AIM must make a
good faith determination that the commissions paid are "reasonable in relation
to the value of the brokerage and research services provided . . . viewed in
terms of either that particular transaction or [AIM's] overall
responsibilities with respect to the accounts as to which it exercises
investment discretion." The services provided by the broker also must lawfully
and appropriately assist AIM in the performance of its investment decision-
making responsibilities. Accordingly, in recognition of research services
provided to it, a Fund may pay a broker higher commissions than those
available from another broker.

                                     A-26
<PAGE>

  Research services received from broker-dealers supplement AIM's own research
(and the research of its affiliates), and may include the following types of
information: statistical and background information on the U.S. and foreign
economies, industry groups and individual companies; forecasts and
interpretations with respect to the U.S. and foreign economies, securities,
markets, specific industry groups and individual companies; information on
federal, state, local and foreign political developments; portfolio management
strategies; performance information on securities, indexes and investment
accounts; information concerning prices of securities; and information
supplied by specialized services to AIM and to the Fund's directors with
respect to the performance, investment activities, and fees and expenses of
other mutual funds. Broker-dealers may communicate such information
electronically, orally, in written form or on computer software. Research
services may also include the providing of custody services, as well as the
providing of equipment used to communicate research information, the providing
of specialized consultations with AIM personnel with respect to computerized
systems and data furnished to AIM as a component of other research services,
the arranging of meetings with management of companies, and the providing of
access to consultants who supply research information.

  The outside research assistance is useful to AIM since the broker-dealers
used by AIM tend to follow a broader universe of securities and other matters
than AIM's staff can follow. In addition, the research provides AIM with a
diverse perspective on financial markets. Research services provided to AIM by
broker-dealers are available for the benefit of all accounts managed or
advised by AIM or by its affiliates. Some broker-dealers may indicate that the
provision of research services is dependent upon the generation of certain
specified levels of commissions and underwriting concessions by AIM's clients,
including the Portfolio. However, the Portfolio is not under any obligation to
deal with any broker-dealer in the execution of transactions in portfolio
securities.

  In some cases, the research services are available only from the broker-
dealer providing them. In other cases, the research services may be obtainable
from alternative sources in return for cash payments. AIM believes that the
research services are beneficial in supplementing AIM's research and analysis
and that they improve the quality of AIM's investment advice. The advisory fee
paid by the Portfolio is not reduced because AIM receives such services.
However, to the extent that AIM would have purchased research services had
they not been provided by broker-dealers, the expenses to AIM could be
considered to have been reduced accordingly.

  Under the 1940 Act, certain persons affiliated with the Fund are prohibited
from dealing with the Portfolios as principal in any purchase or sale of
securities unless an exemptive order allowing such transactions is obtained
from the SEC. Furthermore, the 1940 Act prohibits the Fund from purchasing a
security being publicly underwritten by a syndicate of which certain persons
affiliated with the Fund are members except in accordance with certain
conditions. These conditions may restrict the ability of the Portfolio to
purchase money market obligations being publicly underwritten by such a
syndicate, and the Portfolio may be required to wait until the syndicate has
been terminated before buying such securities. At such time, the market price
of the securities may be higher or lower than the original offering price. A
person affiliated with the Fund may, from time to time, serve as placement
agent or financial advisor to an issuer of money market obligations and be
paid a fee by such issuer. The Portfolio may purchase such money market
obligations directly from the issuer, provided that the purchase made in
accordance with procedures adopted by the Fund's Board of Directors and any
such purchases are reviewed at least quarterly by the Fund's Board of
Directors and a determination is made that all such purchases were effect in
compliance with such procedures, including a determination that the placement
fee or other remuneration paid by the issuer to the person affiliated with the
Fund was fair and reasonable in relation to the fees charged by others
performing similar services. During the fiscal year ended August 31, 1998, no
securities or instruments were purchased by the Portfolio from issuers who
paid placement fees or other compensation to a broker affiliated with the
Portfolio.

                   DIVIDENDS, DISTRIBUTIONS AND TAX MATTERS

DIVIDENDS AND DISTRIBUTIONS

  Dividends with respect to each class of the Portfolio are declared to
shareholders of record immediately after 4:00 p.m. Eastern time on the date of
declaration. Accordingly, dividends accrue on the first day that a purchase
order for shares of a particular class is effective, provided that the
purchase order has been accepted prior to 4:00 p.m. Eastern time and payment
in the form of federal funds wired has been received by AFS. Dividends do not
accrue on the day that a redemption order is effective, unless the redemption
is effective after 4:00 p.m. Eastern time on that day and redemption proceeds
have not be wired to the shareholder on the same day. Thus, if a purchase
order is accepted prior to 4:00 p.m. Eastern time, the shareholder will
receive its pro rata share of dividends beginning with those declared on that
day.

  Dividends and distributions are paid in cash unless the shareholder has
elected to have such dividends and distributions reinvested in the form of
additional full and fractional shares at the net asset value hereof. Such
election, or any revocation thereof, must be made in writing and sent by the
shareholder to the AFS at P.O. Box 4497, Houston, Texas 77210-4497. Such
election or revocation will be effective with dividends paid after it is
received by the transfer agent.

  All dividends declared during a month will normally be paid by wire
transfer. Payment will normally be made on the first business day of the
following month. If a shareholder redeems all the shares in his account at any
time during the month, all dividends declared through the date of redemption
are paid to the shareholder along with the proceeds of the redemption.
Information concerning the amount of the dividends declared on any particular
day will normally be available by 5:00 p.m. Eastern time on that day.

                                     A-27
<PAGE>

  The dividend accrued and paid for each class of shares of the Portfolio will
consist of: (a) interest accrued and original issued discount earned less
amortization of premiums, if any, for the portfolio to which such class
relates, allocated based upon such class' pro rata share of the total shares
outstanding which relate to such portfolio, less (b) Fund expenses accrued for
the applicable dividend period attributable to such portfolio, such as
custodian fees and accounting expenses, allocated based upon each such class'
pro rata share of the net assets of such portfolio, less (c) expenses directly
attributable to each class which are accrued for the applicable dividend
period, such as distribution expenses, if any.

  Should the Fund incur or anticipate any unusual expense, loss or
depreciation, which would adversely affect the net asset value per share of
the Portfolio or the net income per share of a class of the Portfolio for a
particular period, the Board of Directors would at that time consider whether
to adhere to the present dividend policy described above or to revise it in
light of then prevailing circumstances. For example, if the net asset value
per share of the Portfolio were reduced, or were anticipated to be reduced,
below $1.00, the Board of Directors might suspend further dividend payments on
shares of the Portfolio until the net asset value returns to $1.00. Thus, such
expense or loss or depreciation might result in a shareholder receiving no
dividends for the period during which it held shares of the Portfolio and/or
in its receiving upon redemption a price per share lower than that which it
paid.

TAX MATTERS

  The following is only a summary of certain additional tax considerations
generally affecting the Portfolio and its shareholders that are not described
in each Prospectus. No attempt is made to present a detailed explanation of
the tax treatment of the Portfolio or its shareholders, and the discussion
here and in each Prospectus is not intended as a substitute for careful
planning.

QUALIFICATION AS A REGULATED INVESTMENT COMPANY

  The Portfolio has elected to be taxed as a regulated investment company
under Subchapter M of the Internal Revenue Code of 1986, as amended (the
"Code"). As a regulated investment company, the Portfolio is not subject to
federal income tax on the portion of its net investment income (i.e., taxable
interest, dividends and other taxable ordinary income, net of expenses) and
capital gain net income (i.e., the excess of capital gains over capital
losses) that it distributes to shareholders, provided that it distributes at
least 90% of its investment company taxable income (i.e., net investment
income and the excess of net short-term capital gain over net long-term
capital loss) for the taxable year (the "Distribution Requirement"), and
satisfies certain other requirements of the Code that are described below.
Distributions by the Portfolio made during the taxable year or, under
specified circumstances, within twelve months after the close of the taxable
year, will be considered distributions of income and gains for the taxable
year and can therefore satisfy the Distribution Requirement.

  In addition to satisfying the Distribution Requirement, a regulated
investment company (1) must derive at least 90% of its gross income from
dividends, interest, certain payments with respect to securities loans, gains
from the sale or other disposition of stock or securities or foreign
currencies (to the extent such currency gains are directly related to the
regulated investment company's principal business of investing in stock or
securities) and other income (including but not limited to gains from options,
futures or forward contracts) derived with respect to its business of
investing in such stock, securities or currencies (the "Income Requirement");
and (2) must satisfy an asset diversification test in order to qualify for tax
purposes as a regulated investment company (the "Asset Diversification Test").
Under the Asset Diversification Test, at the close of each quarter of a fund's
taxable year, at least 50% of the value of a fund's assets must consist of
cash and cash items, U.S. Government securities, securities of other regulated
investment companies, and securities of other issuers (as to which a fund has
not invested more than 5% of the value of a fund's total assets in securities
of such issuer and as to which a fund does not hold more than 10% of the
outstanding voting securities of such issuer), and no more than 25% of the
value of its total assets may be invested in the securities of any other
issuer (other than U.S. Government securities and securities of other
regulated investment companies), or in two or more issuers which a fund
controls and which are engaged in the same or similar trades or businesses.

  If, for any taxable year the Portfolio does not qualify as a regulated
investment company, all of its taxable income (including its net capital gain)
will be subject to tax at regular corporate rates without any deduction for
distributions to shareholders, and such distributions will be taxable as
ordinary dividends to the extent of the Portfolio's current and accumulated
earnings and profits. Such distributions generally will be eligible for the
dividends received deduction in the case of corporate shareholders.

EXCISE TAX ON REGULATED INVESTMENT COMPANIES

  A 4% non-deductible excise tax is imposed on a regulated investment company
that fails to distribute in each calendar year an amount equal to 98% of
ordinary taxable income for the calendar year and 98% of capital gain net
income for the one-year period ended on October 31 of such calendar year (or,
at the election of a regulated investment company having a taxable year ending
November 30 or December 31, for its taxable year). The balance of such income
must be distributed during the next calendar year. For the foregoing purposes,
a regulated investment company is treated as having distributed any amount on
which it is subject to income tax for any taxable year ending in such calendar
year.

                                     A-28
<PAGE>

  The Portfolio intends to make sufficient distributions or deemed
distributions of its ordinary taxable income and capital gain net income prior
to the end of each calendar year to avoid liability for the excise tax.
However, investors should note that the Portfolio may in certain circumstances
be required to liquidate portfolio investments to make sufficient
distributions to avoid excise tax liability.

PORTFOLIO DISTRIBUTIONS

  The Portfolio anticipates distributing substantially all of its investment
company taxable income for each taxable year. Such distributions will be
taxable to shareholders as ordinary income and treated as dividends for
federal income tax purposes, but they will not qualify for the 70% dividends
received deduction for corporations.

  The Portfolio may either retain or distribute to shareholders its net
capital gain, if any, for each taxable year. The Portfolio currently intends
to distribute any such amounts. If net capital gain is distributed and
designated as a capital gain dividend, it will be taxable to shareholders as
long-term capital gain, regardless of the length of time the shareholder has
held his shares or whether such gain was recognized by the Portfolio prior to
the date on which the shareholder acquired his shares.

  Distributions by the Portfolio that do not constitute ordinary income
dividends or capital gain dividends will be treated as a return of capital to
the extent of (and in reduction of) the shareholder's tax basis in his shares;
any excess will be treated as gain from the sale of his shares.

  Distributions by the Portfolio will be treated in the manner described above
regardless of whether such distributions are paid in cash or reinvested in
additional shares of a class of the Portfolio. Shareholders receiving a
distribution in the form of additional shares will be treated as receiving a
distribution in an amount equal to the fair market value of the shares
received, determined as of the reinvestment date.

  Ordinarily, shareholders are required to take distributions by the Portfolio
into account in the year in which the distributions are made. However,
dividends declared in October, November or December of any year and payable to
shareholders of record on a specified date in such a month will be deemed to
have been received by the shareholders (and made by the Portfolio) on December
31 of such calendar year if such dividends are actually paid in January of the
following year.

  The Portfolio will be required in certain cases to withhold and remit to the
U.S. Treasury 31% of the ordinary income dividends and capital gain dividends
and, in certain cases, the proceeds of redemption of shares, paid to any
shareholder (1) who has provided either an incorrect tax identification number
or no number at all, (2) who is subject to backup withholding by the Internal
Revenue Service for failure to report the receipt of interest or dividend
income properly, or (3) who has failed to certify to the Fund that it is not
subject to backup withholding or that it is a corporation or other "exempt
recipient."

SALE OR REDEMPTION OF SHARES

  A shareholder will recognize gain or loss on the sale or redemption of
shares of a class in an amount equal to the difference between the proceeds of
the sale or redemption and the shareholder's adjusted tax basis in the shares.
All or a portion of any loss so recognized may be disallowed if the
shareholder purchases other shares of the class within 30 days before or after
the sale or redemption. In general, any gain or loss arising from (or treated
as arising from) the sale or redemption of shares of a class will be
considered capital gain or loss and will be long-term capital gain or loss if
the shares were held for longer than one year. However, any capital loss
arising from the sale or redemption of shares held for six months or less will
be treated as a long-term capital loss to the extent of the amount of capital
gain dividends received on such shares. For this purpose, the special holding
period rules of Code Section 246(c)(3) and (4) generally will apply in
determining the holding period of shares.

FOREIGN SHAREHOLDERS

  Taxation of a shareholder who, as to the United States, is a nonresident
alien individual, foreign trust or estate, foreign corporation, or foreign
partnership ("foreign shareholder"), depends on whether the income from the
Portfolio is "effectively connected" with a U.S. trade or business carried on
by such shareholder.

  If the income from the Portfolio is not effectively connected with a U.S.
trade or business carried on by a foreign shareholder, dividends and
distributions (other than capital gains dividends) will be subject to U.S.
withholding tax at the rate of 30% (or lower treaty rate) upon the gross
amount of the dividend or distribution. Such a foreign shareholder would
generally be exempt from U.S. federal income tax on gains realized on the sale
of shares of a class, capital gain dividends and amounts retained by the
Portfolio that are designated as undistributed capital gains.

  If the income from the Portfolio is effectively connected with a U.S. trade
or business carried on by a foreign shareholder, then ordinary income
dividends, capital gain dividends and any gains realized upon the sale of
shares of the Portfolio will be subject to U.S. federal income tax at the
rates applicable to U.S. citizens or domestic corporations.

                                     A-29
<PAGE>

  In the case of foreign noncorporate shareholders, the Portfolio may be
required to withhold U.S. federal income tax at a rate of 31% on distributions
that are otherwise exempt from withholding tax unless such shareholders
furnish the Portfolio with proper notification of their foreign status.

  The tax consequences to a foreign shareholder entitled to claim the benefits
of an applicable tax treaty may be different from those described herein.
Foreign shareholders are urged to consult their own tax advisers with respect
to the particular tax consequences to them of an investment in the Portfolio,
including the applicability of foreign taxes.

  Foreign persons who file a United States tax return for a U.S. tax refund
and who are not eligible to obtain a social security number must apply to the
Internal Revenue Service (IRS) for an individual taxpayer identification
number, using IRS From W-7. For a copy of the IRS Form W-7 and accompanying
instructions, please contact your tax advisor or transfer agent.

EFFECT OF FUTURE LEGISLATION; LOCAL TAX CONSIDERATIONS

  The foregoing general discussion of U.S. federal income tax consequences is
based on the Code and the regulations issued thereunder as in effect on
November 1, 1999. Future legislative or administrative changes or court
decisions may significantly change the conclusions expressed herein, and any
such changes or decisions may have a retroactive effect with respect to the
transactions contemplated herein.

  Rules of state and local taxation of ordinary income dividends and capital
gain dividends from regulated investment companies often differ from the rules
for U.S. federal income taxation described above. Shareholders are urged to
consult their tax advisors as to the consequences of these and other state and
local tax rules affecting investment in the Fund.

                                     A-30
<PAGE>

                             FINANCIAL STATEMENTS

                                      FS
<PAGE>

SCHEDULE OF INVESTMENTS
August 31, 1999
<TABLE>
<CAPTION>
                                                         PAR
                                              MATURITY  (000)       VALUE
<S>                                           <C>       <C>      <C>
COMMERCIAL PAPER - 82.48%(a)

BASIC INDUSTRIES - 2.62%

CHEMICALS - 0.63%

Du Pont (E.I.) de Nemours and Co.
5.05%                                         09/03/99  $ 25,000  $  24,992,985
- -------------------------------------------------------------------------------
Henkel Corp.
5.07%                                         09/02/99    30,000     29,995,775
- -------------------------------------------------------------------------------
                                                                     54,988,760
- -------------------------------------------------------------------------------

METAL MINING - 1.99%

Rio Tinto America, Inc.
5.12%                                         09/01/99    50,000     50,000,000
- -------------------------------------------------------------------------------
5.11%                                         09/07/99    50,000     49,957,417
- -------------------------------------------------------------------------------
5.27%                                         09/29/99    42,300     42,126,617
- -------------------------------------------------------------------------------
5.27%                                         09/30/99    32,000     31,864,151
- -------------------------------------------------------------------------------
                                                                    173,948,185
- -------------------------------------------------------------------------------
  Total Basic Industries                                            228,936,945
- -------------------------------------------------------------------------------

CAPITAL GOODS - 0.83%

ELECTRICAL EQUIPMENT - 0.83%

Siemens Capital Corp.
5.12%                                         09/24/99    72,775     72,536,944
- -------------------------------------------------------------------------------

CONSUMER DURABLES - 1.43%

AUTOMOBILE - 1.43%

Daimler-Chrysler North America Holding Corp.
5.09%                                         09/09/99    50,000     49,943,444
- -------------------------------------------------------------------------------
5.27%                                         10/12/99    25,000     24,849,951
- -------------------------------------------------------------------------------
5.29%                                         10/22/99    25,000     24,812,646
- -------------------------------------------------------------------------------
5.28%                                         10/26/99    25,000     24,798,333
- -------------------------------------------------------------------------------
  Total Consumer Durables                                           124,404,374
- -------------------------------------------------------------------------------

CONSUMER NONDURABLES - 2.61%

HOUSEHOLD PRODUCTS - 2.61%

Colgate-Palmolive Co.
5.26%                                         09/30/99    67,000     66,716,106
- -------------------------------------------------------------------------------
Kimberly-Clark Worldwide, Inc.
5.27%                                         10/13/99    33,021     32,817,976
- -------------------------------------------------------------------------------
Procter & Gamble Co.
5.10%                                         09/13/99    50,000     49,915,000
- -------------------------------------------------------------------------------
5.14%                                         09/20/99    28,500     28,422,686
- -------------------------------------------------------------------------------
5.16%                                         09/23/99    50,000     49,842,333
- -------------------------------------------------------------------------------
  Total Consumer Nondurables                                        227,714,101
- -------------------------------------------------------------------------------
</TABLE>

                                     FS-1
<PAGE>

<TABLE>
<CAPTION>
                                                PAR
                                    MATURITY   (000)       VALUE
<S>                                 <C>        <C>       <C>
ENERGY - 1.94%

OIL & GAS - 1.94%

Chevron U. S. A., Inc.
5.27%                               10/29/99  $ 50,000   $ 49,575,472
- ---------------------------------------------------------------------
Koch Industries, Inc.
5.07%                               09/01/99    50,000     50,000,000
- ---------------------------------------------------------------------
Petrofina Delaware, Inc.
5.13%                               09/27/99    20,000     19,925,900
- ---------------------------------------------------------------------
5.30%                               10/25/99    50,000     49,602,500
- ---------------------------------------------------------------------
  Total Energy                                            169,103,872
- ---------------------------------------------------------------------

FINANCIAL - 71.52%

ASSET-BACKED SECURITIES-COMMERCIAL LOANS/LEASES - 4.98%

Centric Capital Corp.
5.13%                               09/13/99    40,000     39,931,600
- ---------------------------------------------------------------------
5.14%                               09/23/99    40,742     40,614,025
- ---------------------------------------------------------------------
5.16%                               09/28/99    40,000     39,845,200
- ---------------------------------------------------------------------
5.20%                               09/29/99    50,000     49,797,778
- ---------------------------------------------------------------------
5.30%                               09/29/99    80,226     79,895,291
- ---------------------------------------------------------------------
5.35%                               10/06/99    20,000     19,895,972
- ---------------------------------------------------------------------
5.31%                               10/08/99    44,000     43,759,870
- ---------------------------------------------------------------------
Fleet Funding Corp.
5.12%                               09/17/99    54,655     54,530,629
- ---------------------------------------------------------------------
5.31%                               10/12/99    66,381     65,979,561
- ---------------------------------------------------------------------
                                                          434,249,926
- ---------------------------------------------------------------------

ASSET-BACKED SECURITIES-CONSUMER RECEIVABLES - 4.00%

Old Line Funding Corp.
5.33%                               10/07/99    25,851     25,713,214
- ---------------------------------------------------------------------
Riverwoods Funding Corp.
5.17%                               09/08/99    40,000     39,959,789
- ---------------------------------------------------------------------
5.12%                               09/24/99    50,000     49,836,444
- ---------------------------------------------------------------------
5.13%                               09/27/99    50,000     49,814,750
- ---------------------------------------------------------------------
5.20%                               09/27/99    50,000     49,812,222
- ---------------------------------------------------------------------
5.30%                               10/01/99    50,000     49,779,167
- ---------------------------------------------------------------------
Thunder Bay Funding Inc.
5.12%                               09/10/99    42,273     42,218,891
- ---------------------------------------------------------------------
5.14%                               09/17/99    42,280     42,183,414
- ---------------------------------------------------------------------
                                                          349,317,891
- ---------------------------------------------------------------------
</TABLE>

                                     FS-2
<PAGE>

<TABLE>
<CAPTION>
                                                      PAR
                                         MATURITY    (000)       VALUE
<S>                                      <C>         <C>        <C>
ASSET-BACKED SECURITIES-MULTI-PURPOSE - 31.69%

Aspen Funding Corp.
5.30%                                    10/05/99    $ 50,000  $  49,749,722
- ----------------------------------------------------------------------------
5.34%                                    10/15/99     100,000     99,347,334
- ----------------------------------------------------------------------------
5.35%                                    10/22/99      50,000     49,621,042
- ----------------------------------------------------------------------------
Clipper Receivables Corp.
5.13%                                    09/03/99      50,000     49,985,750
- ----------------------------------------------------------------------------
5.12%                                    09/07/99      50,000     49,957,333
- ----------------------------------------------------------------------------
5.30%                                    10/05/99      50,000     49,749,722
- ----------------------------------------------------------------------------
5.30%                                    10/08/99      80,000     79,564,222
- ----------------------------------------------------------------------------
Corporate Receivables Corp.
5.12%                                    09/08/99      50,000     49,950,222
- ----------------------------------------------------------------------------
5.12%                                    09/15/99      50,000     49,900,444
- ----------------------------------------------------------------------------
5.13%                                    09/15/99      50,000     49,900,250
- ----------------------------------------------------------------------------
5.12%                                    09/16/99      50,000     49,893,333
- ----------------------------------------------------------------------------
5.11%                                    09/20/99      50,000     49,865,153
- ----------------------------------------------------------------------------
5.13%                                    09/21/99      30,000     29,914,500
- ----------------------------------------------------------------------------
5.13%                                    09/23/99      50,000     49,843,250
- ----------------------------------------------------------------------------
5.30%                                    10/04/99      75,000     74,635,625
- ----------------------------------------------------------------------------
5.30%                                    10/08/99      50,000     49,727,639
- ----------------------------------------------------------------------------
Edison Asset Securitization, L.L.C.
5.16%                                    09/14/99      50,000     49,906,833
- ----------------------------------------------------------------------------
Enterprise Funding Corp.
5.13%                                    09/10/99      50,000     49,935,875
- ----------------------------------------------------------------------------
5.17%                                    09/28/99      24,693     24,597,253
- ----------------------------------------------------------------------------
5.20%                                    09/28/99      53,999     53,788,404
- ----------------------------------------------------------------------------
5.28%                                    09/30/99      25,185     25,077,880
- ----------------------------------------------------------------------------
5.35%                                    10/07/99      17,632     17,537,669
- ----------------------------------------------------------------------------
Falcon Asset Securitization Corp.
4.13%                                    09/09/99      50,000     49,943,000
- ----------------------------------------------------------------------------
5.16%                                    09/15/99      40,000     39,919,733
- ----------------------------------------------------------------------------
5.17%                                    09/27/99      25,000     24,906,653
- ----------------------------------------------------------------------------
Mont Blanc Capital Corp.
5.35%                                    10/19/99      40,000     39,714,667
- ----------------------------------------------------------------------------
Monte Rosa Capital Corp.
5.35%                                    10/13/99      92,000     91,425,767
- ----------------------------------------------------------------------------
5.35%                                    10/15/99      25,000     24,836,528
- ----------------------------------------------------------------------------
5.35%                                    10/18/99      47,000     46,671,718
- ----------------------------------------------------------------------------
</TABLE>

                                     FS-3
<PAGE>

<TABLE>
<CAPTION>
                                                       PAR
                                         MATURITY     (000)       VALUE
<S>                                      <C>        <C>       <C>

ASSET-BACKED SECURITIES-MULTI-PURPOSE - (CONTINUED)

Newport Funding Corp.
5.13%                                    09/16/99   $ 50,000   $ 49,893,125
- ---------------------------------------------------------------------------
5.13%                                    09/21/99     50,000     49,857,500
- ---------------------------------------------------------------------------
5.30%                                    10/07/99    100,000     99,470,000
- ---------------------------------------------------------------------------
5.35%                                    10/22/99     50,000     49,621,042
- ---------------------------------------------------------------------------
Park Avenue Receivables Corp.
5.12%                                    09/10/99     35,000     34,955,200
- ---------------------------------------------------------------------------
5.14%                                    09/22/99     40,119     39,998,710
- ---------------------------------------------------------------------------
5.19%                                    09/22/99     50,000     49,848,625
- ---------------------------------------------------------------------------
5.35%                                    10/12/99     29,976     29,793,355
- ---------------------------------------------------------------------------
Preferred Receivables Funding Corp.
5.12%                                    09/13/99     25,000     24,957,333
- ---------------------------------------------------------------------------
5.13%                                    09/13/99     20,000     19,965,800
- ---------------------------------------------------------------------------
5.13%                                    09/16/99     50,000     49,893,125
- ---------------------------------------------------------------------------
5.12%                                    09/20/99     10,000      9,972,978
- ---------------------------------------------------------------------------
5.30%                                    10/05/99     24,800     24,675,862
- ---------------------------------------------------------------------------
Quincy Capital Corp.
5.13%                                    09/07/99     50,000     49,957,250
- ---------------------------------------------------------------------------
5.12%                                    09/08/99     31,655     31,623,486
- ---------------------------------------------------------------------------
5.12%                                    09/14/99     88,620     88,456,151
- ---------------------------------------------------------------------------
5.13%                                    09/14/99     27,151     27,100,703
- ---------------------------------------------------------------------------
5.14%                                    09/16/99     26,066     26,010,175
- ---------------------------------------------------------------------------
5.12%                                    09/17/99     30,226     30,157,219
- ---------------------------------------------------------------------------
5.17%                                    09/20/99     29,997     29,915,150
- ---------------------------------------------------------------------------
5.30%                                    10/06/99     74,274     73,891,283
- ---------------------------------------------------------------------------
5.30%                                    10/07/99     57,131     56,828,206
- ---------------------------------------------------------------------------
5.35%                                    10/12/99     55,101     54,765,266
- ---------------------------------------------------------------------------
Receivables Capital Corp.
5.14%                                    09/16/99     20,000     19,957,167
- ---------------------------------------------------------------------------
5.30%                                    10/06/99     53,193     52,918,908
- ---------------------------------------------------------------------------
5.30%                                    10/08/99     83,865     83,408,169
- ---------------------------------------------------------------------------
Sheffield Receivables Corp.
5.15%                                    09/24/99     22,500     22,425,969
- ---------------------------------------------------------------------------
5.22%                                    09/28/99     42,800     42,632,438
- ---------------------------------------------------------------------------
5.28%                                    10/04/99     80,400     80,010,864
- ---------------------------------------------------------------------------
5.38%                                    10/15/99     42,200     41,922,511
- ---------------------------------------------------------------------------
                                                              2,764,751,091
- ---------------------------------------------------------------------------
</TABLE>

                                     FS-4
<PAGE>

<TABLE>
<CAPTION>
                                                          PAR
                                             MATURITY    (000)        VALUE
<S>                                          <C>       <C>        <C>
ASSET-BACKED SECURITIES-TRADE RECEIVABLES - 11.33%

Asset Securitization Cooperative Corp.
5.12%                                        09/17/99  $ 30,000  $  29,931,733
- ------------------------------------------------------------------------------
5.12%                                        09/20/99    50,000     49,864,889
- ------------------------------------------------------------------------------
5.15%                                        09/27/99    50,000     49,814,028
- ------------------------------------------------------------------------------
Ciesco, L.P.
5.16%                                        09/22/99    50,000     49,849,500
- ------------------------------------------------------------------------------
Corporate Asset Funding Co., Inc.
5.12%                                        09/01/99    20,000     20,000,000
- ------------------------------------------------------------------------------
5.12%                                        09/09/99    50,000     49,943,111
- ------------------------------------------------------------------------------
5.16%                                        09/23/99    40,000     39,873,867
- ------------------------------------------------------------------------------
5.20%                                        09/28/99    75,000     74,707,500
- ------------------------------------------------------------------------------
5.31%                                        10/08/99    50,000     49,727,125
- ------------------------------------------------------------------------------
Delaware Funding Corp.
5.12%                                        09/10/99    25,000     24,968,000
- ------------------------------------------------------------------------------
5.13%                                        09/15/99    25,059     25,009,007
- ------------------------------------------------------------------------------
5.18%                                        09/20/99    32,031     31,943,431
- ------------------------------------------------------------------------------
5.33%                                        10/08/99    66,368     66,004,432
- ------------------------------------------------------------------------------
Variable Funding Capital
5.12%                                        09/07/99    50,000     49,957,333
- ------------------------------------------------------------------------------
5.11%                                        09/13/99    25,000     24,957,416
- ------------------------------------------------------------------------------
5.13%                                        09/14/99    20,000     19,962,950
- ------------------------------------------------------------------------------
5.30%                                        10/07/99    59,075     58,761,903
- ------------------------------------------------------------------------------
5.34%                                        10/13/99   100,000     99,377,000
- ------------------------------------------------------------------------------
5.34%                                        10/18/99    50,000     49,651,417
- ------------------------------------------------------------------------------
5.34%                                        10/19/99    50,000     49,644,000
- ------------------------------------------------------------------------------
5.35%                                        10/22/99    75,000     74,431,563
- ------------------------------------------------------------------------------
                                                                   988,380,205
- ------------------------------------------------------------------------------

BANKING - 3.48%

Canadian Imperial Holdings, Inc.
5.10%                                        09/01/99    30,000     30,000,000
- ------------------------------------------------------------------------------
Citicorp
5.15%                                        09/21/99    70,000     69,799,722
- ------------------------------------------------------------------------------
Banc One Financial Corp.
5.11%                                        09/08/99    50,000     49,950,319
- ------------------------------------------------------------------------------
5.13%                                        09/13/99    35,000     34,940,150
- ------------------------------------------------------------------------------
5.28%                                        10/04/99    45,000     44,782,200
- ------------------------------------------------------------------------------
5.26%                                        10/12/99    15,000     14,910,142
- ------------------------------------------------------------------------------
5.34%                                        10/18/99    60,000     59,581,700
- ------------------------------------------------------------------------------
                                                                   303,964,233
- ------------------------------------------------------------------------------
</TABLE>

                                     FS-5
<PAGE>

<TABLE>
<CAPTION>
                                                            PAR
                                              MATURITY     (000)       VALUE
<S>                                           <C>         <C>      <C>
BROKERAGE/INVESTMENTS - 1.15%

Bear, Stearns & Co., Inc.
5.12%                                         09/08/99   $ 50,000  $  49,950,222
- --------------------------------------------------------------------------------
Merrill Lynch & Co., Inc.
5.30%                                         10/01/99     50,000     49,779,167
- --------------------------------------------------------------------------------
                                                                      99,729,389
================================================================================

FINANCIAL (DIVERSIFIED) - 12.62%

Ameritech Capital Funding Corp.
5.08%                                         09/02/99     50,000     49,992,944
- --------------------------------------------------------------------------------
Associates First Capital Corp.
5.15%                                         09/21/99     50,000     49,856,944
- --------------------------------------------------------------------------------
5.14%                                         09/23/99     40,000     39,874,356
- --------------------------------------------------------------------------------
5.33%                                         10/20/99     50,000     49,637,264
- --------------------------------------------------------------------------------
5.33%                                         10/26/99     30,000     29,755,708
- --------------------------------------------------------------------------------
BellSouth Capital Funding Corp.
5.12%                                         09/22/99     50,000     49,850,667
- --------------------------------------------------------------------------------
CIT Group Holdings, Inc. (The)
5.30%                                         10/26/99     50,000     49,595,139
- --------------------------------------------------------------------------------
Commercial Credit Co.
5.11%                                         09/10/99     50,000     49,936,125
- --------------------------------------------------------------------------------
Deere (John) Capital Corp.
5.13%                                         09/17/99     50,000     49,886,000
- --------------------------------------------------------------------------------
Deutsche Bank Financial Inc.
5.10%                                         09/03/99     50,000     49,985,833
- --------------------------------------------------------------------------------
Dresdner U.S. Finance, Inc.
5.11%                                         09/02/99     50,000     49,992,903
- --------------------------------------------------------------------------------
Ford Motor Credit Co.
5.11%                                         09/03/99     50,000     49,985,806
- --------------------------------------------------------------------------------
5.13%                                         09/15/99     50,000     49,900,250
- --------------------------------------------------------------------------------
5.30%                                         10/06/99     50,000     49,742,361
- --------------------------------------------------------------------------------
General Electric Capital Services
5.31%                                         10/19/99    100,000     99,292,000
- --------------------------------------------------------------------------------
5.30%                                         10/20/99    100,000     99,278,612
- --------------------------------------------------------------------------------
General Motors Acceptance Corp.
5.31%                                         10/20/99     50,000     49,638,625
- --------------------------------------------------------------------------------
International Lease Finance Corp.
5.08%                                         09/09/99     50,000     49,943,556
- --------------------------------------------------------------------------------
National Rural Utilities Cooperative Finance Corp.
5.24%                                         10/12/99     35,000     34,791,128
- --------------------------------------------------------------------------------
</TABLE>

                                     FS-6
<PAGE>

<TABLE>
<CAPTION>
                                                            PAR
                                              MATURITY     (000)        VALUE
<S>                                           <C>        <C>        <C>
UBS Finance (Delaware) Inc.
5.11%                                        09/02/99   $ 50,000  $   49,992,903
- --------------------------------------------------------------------------------
5.25%                                        10/12/99     50,000      49,701,042
- --------------------------------------------------------------------------------
                                                                   1,100,630,166
- --------------------------------------------------------------------------------

INSURANCE (LIFE) - 0.57%

Prudential Funding Corp.
5.16%                                        09/21/99     50,000      49,856,667
- --------------------------------------------------------------------------------

PERSONAL CREDIT - 1.14%

American Express Credit Corp.
5.07%                                        09/01/99     50,000      50,000,000
- --------------------------------------------------------------------------------
5.27%                                        10/26/99     50,000      49,597,431
- --------------------------------------------------------------------------------
                                                                      99,597,431
- --------------------------------------------------------------------------------

MULTIPLE INDUSTRY - 0.56%

American General Corp.
5.31%                                        10/25/99     50,000      49,601,750
- --------------------------------------------------------------------------------
  Total Financial                                                  6,240,078,749
- --------------------------------------------------------------------------------

TECHNOLOGY - 0.39%

COMPUTERS (SOFTWARE & SERVICES) - 0.39%

Electronic Data Systems Corp.
5.13%                                        09/24/99     33,550      33,440,040
- --------------------------------------------------------------------------------
  Total Technology                                                    33,440,040
- --------------------------------------------------------------------------------

UTILITIES - 1.14%

TELEPHONE - 1.14%

BellSouth Telecommunications, Inc.
5.28%                                        10/15/99     50,000      49,677,333
- --------------------------------------------------------------------------------
SBC Communications, Inc.
5.28%                                        10/27/99     50,000      49,589,333
- --------------------------------------------------------------------------------
  Total Utilities                                                     99,266,666
- --------------------------------------------------------------------------------
  Total Commercial Paper (Cost - $7,195,481,691)                   7,195,481,691
- --------------------------------------------------------------------------------

MASTER NOTE AGREEMENT - 3.57%

Merrill Lynch Mortgage Capital, Inc.
5.82%(b)                                     08/17/00    311,525     311,525,000
- --------------------------------------------------------------------------------
  Total Master Note Agreement (Cost - $311,525,000)                  311,525,000
- --------------------------------------------------------------------------------
</TABLE>

                                     FS-7
<PAGE>

<TABLE>
<CAPTION>
                                                       PAR
                                          MATURITY    (000)       VALUE
<S>                                       <C>      <C>      <C>
MEDIUM TERM NOTE - 0.45%

Toyota Motor Credit Corp.
5.26%                                     09/29/99  $ 40,000  $  39,996,709
- ---------------------------------------------------------------------------
  Total Medium Term Note (cost - $39,996,709)                    39,996,709
- ---------------------------------------------------------------------------
  Total Investments (excluding Repurchase Agreements)         7,547,003,400
- ---------------------------------------------------------------------------

REPURCHASE AGREEMENTS - 13.95%(c)

Dean Witter Reynolds Inc.
 5.51%(d)                                 09/01/99   163,902    163,901,609
- ---------------------------------------------------------------------------
Goldman, Sachs & Co.
 5.40%(e)                                 01/24/00   100,000    100,000,000
- ---------------------------------------------------------------------------
 4.625%(f)                                01/26/00   100,000    100,000,000
- ---------------------------------------------------------------------------
Salomon Smith Barney Inc.
 5.51%(g)                                       --   853,000    853,000,000
- ---------------------------------------------------------------------------
  Total Repurchase Agreements (Cost - $1,216,901,609)         1,216,901,609
- ---------------------------------------------------------------------------
TOTAL INVESTMENTS - 100.45%                                   8,763,905,009(h)
- ---------------------------------------------------------------------------
LIABILITIES LESS OTHER ASSETS - (0.45%)                         (39,680,318)
- ---------------------------------------------------------------------------
NET ASSETS - 100.00%                                         $8,724,224,691
===========================================================================
</TABLE>
NOTES TO SCHEDULE OF INVESTMENTS:
(a) Some commercial paper is traded on a discount basis. In such cases the
    interest rate shown represents the rate of discount paid or received at the
    time of purchase by the Portfolio.
(b) Master Note Purchase Agreement may be terminated by either party upon one
    business day prior written notice, at which time all amounts outstanding
    under the notes purchased under the Master Note Agreement will become
    payable. Interest rates on master notes are redetermined periodically. Rate
    shown is the rate in effect on 08/31/99.
(c) Collateral on repurchase agreements, including the Portfolio's pro-rata
    interest in joint repurchase agreements, is taken into possession by the
    Portfolio upon entering into the repurchase agreement. The collateral is
    marked to market daily to ensure its market value is at least 102% of the
    sales price of the repurchase agreement. The investments in some repurchase
    agreements are through participation in joint accounts with other mutual
    funds, private accounts and certain non-registered investment companies
    managed by the investment advisor or its affiliates.
(d) Joint repurchase agreement entered into 08/31/99 with a maturing value of
    $300,045,913. Collateralized by $312,373,000 U.S. Government obligations,
    0% to 8.25% due 09/14/99 to 05/15/29 with an aggregate market value at
    08/31/99 of $306,004,298.
(e) Term repurchase agreement entered into 07/29/99; however, either party may
    terminate the agreement upon demand. Interest rates, par and collateral are
    redetermined daily. Collateralized by $105,904,376 U.S. Government Agency
    securities, 5.00% to 7.50% due 09/01/06 to 08/01/29 with an aggregate
    market value at 08/31/99 of $102,000,000.
(f) Term repurchase agreement entered into 08/13/99; however, either party may
    terminate the agreement upon demand. Interest rates, par and collateral are
    redetermined daily. Collateralized by $106,703,765 U.S. Government Agency
    securities, 5.50% to 8.00% due 01/01/05 to 08/01/29 with an aggregate
    market value at 08/31/99 of $102,000,001.
(g) Open repurchase agreement. Either party may terminate the agreement upon
    demand. Interest rates, par and collateral are redetermined daily.
    Collateralized by $880,779,143 U.S. Government obligations, 0% to 6.85% due
    10/21/99 to 01/15/29 with an aggregate market value at 08/31/99 of
    $889,114,611.
(h) Also represents cost for federal income tax purposes.

See Notes to Financial Statements.

                                     FS-8
<PAGE>

STATEMENT OF ASSETS AND LIABILITIES
August 31, 1999

<TABLE>
<CAPTION>
<S>                                                      <C>
ASSETS:

Investments, excluding repurchase agreements, at value
 (amortized cost)                                         $7,547,003,400
- ------------------------------------------------------------------------
Repurchase agreements                                      1,216,901,609
- ------------------------------------------------------------------------
Interest receivable                                            2,570,288
- ------------------------------------------------------------------------
Investment for deferred compensation plan                        133,814
- ------------------------------------------------------------------------
Other assets                                                     473,146
- ------------------------------------------------------------------------
  Total assets                                             8,767,082,257
- ------------------------------------------------------------------------

LIABILITIES:

Payables for:
  Dividends                                                   41,245,353
- ------------------------------------------------------------------------
  Deferred compensation                                          133,814
- ------------------------------------------------------------------------
Accrued administrative services fees                              37,708
- ------------------------------------------------------------------------
Accrued advisory fees                                            455,928
- ------------------------------------------------------------------------
Accrued distribution fees                                        409,769
- ------------------------------------------------------------------------
Accrued transfer agent fees                                       92,318
- ------------------------------------------------------------------------
Accrued operating expenses                                       482,676
- ------------------------------------------------------------------------
  Total liabilities                                           42,857,566
- ------------------------------------------------------------------------
NET ASSETS                                                $8,724,224,691
========================================================================

NET ASSETS:

Institutional Class                                       $6,210,056,165
========================================================================
Private Investment Class                                  $  384,893,974
========================================================================
Personal Investment Class                                 $   87,753,556
========================================================================
Cash Management Class                                     $1,253,799,271
========================================================================
Reserve Class                                             $  121,782,725
========================================================================
Resource Class                                            $  665,939,000
========================================================================

CAPITAL STOCK, $.001 PAR VALUE PER SHARE:

Institutional Class                                        6,210,062,703
========================================================================
Private Investment Class                                     384,894,228
========================================================================
Personal Investment Class                                     87,753,580
========================================================================
Cash Management Class                                      1,253,799,009
========================================================================
Reserve Class                                                121,782,724
========================================================================
Resource Class                                               665,938,785
========================================================================

NET ASSET VALUE PER SHARE:

Net asset value, offering and redemption price per share           $1.00
========================================================================
</TABLE>

See Notes to Financial Statements.

                                     FS-9
<PAGE>

STATEMENT OF OPERATIONS
For the year ended August 31, 1999

<TABLE>
<S>                                                          <C>
INVESTMENT INCOME:

Interest income                                              $  488,890,186
===========================================================================

EXPENSES:

Advisory fees                                                     5,205,023
- ---------------------------------------------------------------------------
Custodian fees                                                      419,158
- ---------------------------------------------------------------------------
Administrative services fees                                        258,934
- ---------------------------------------------------------------------------
Directors' fees and expenses                                         63,108
- ---------------------------------------------------------------------------
Transfer agent fees                                               1,057,109
- ---------------------------------------------------------------------------
Distribution fees (Note 2)                                        5,691,057
- ---------------------------------------------------------------------------
Other                                                             1,130,340
===========================================================================
  Total expenses                                                 13,824,729
===========================================================================
Less: Fee waivers                                                (1,675,069)
===========================================================================
  Net expenses                                                   12,149,660
===========================================================================
Net investment income                                           476,740,526
===========================================================================
Net increase in net assets resulting from operations         $  476,740,526
===========================================================================
</TABLE>

STATEMENT OF CHANGES IN NET ASSETS
For the years ended August 31, 1999 and 1998

<TABLE>
<CAPTION>
                                                  1999            1998
                                             --------------  --------------
<S>                                          <C>             <C>
OPERATIONS:

 Net investment income                       $  476,740,526  $  423,578,403
===========================================================================
  Net increase in net assets resulting from
   operations                                   476,740,526     423,578,403
===========================================================================
Distributions to shareholders from net
 investment income:
  Institutional Class                          (364,347,968)   (334,784,531)
- ---------------------------------------------------------------------------
  Private Investment Class                      (18,159,703)    (14,188,012)
- ---------------------------------------------------------------------------
  Personal Investment Class                      (6,869,222)     (5,889,522)
- ---------------------------------------------------------------------------
  Cash Management Class                         (57,786,622)    (49,287,200)
- ---------------------------------------------------------------------------
  Reserve Class                                  (1,195,139)    (19,429,138)
- ---------------------------------------------------------------------------
  Resource Class                                (28,381,872)             --
- ---------------------------------------------------------------------------
Capital stock transactions-net (See Note 4)     884,926,848     984,587,209
- ---------------------------------------------------------------------------
  Net increase in net assets                    884,926,848     984,587,209
- ---------------------------------------------------------------------------

NET ASSETS:

  Beginning of period                         7,839,297,843   6,854,710,634
- ---------------------------------------------------------------------------
  End of period                              $8,724,224,691  $7,839,297,843
===========================================================================

NET ASSETS CONSIST OF:

  Capital (par value and additional paid-in) $8,724,231,029  $7,839,304,181
- ---------------------------------------------------------------------------
  Undistributed net realized gain (loss) on
   sales of investments                              (6,338)         (6,338)
- ---------------------------------------------------------------------------
                                             $8,724,224,691  $7,839,297,843
===========================================================================
</TABLE>

See Notes to Financial Statements.

                                     FS-10
<PAGE>

NOTES TO FINANCIAL STATEMENTS
August 31, 1999

NOTE 1-SIGNIFICANT ACCOUNTING POLICIES

Short-Term Investments Co. (the "Fund") is registered under the Investment
Company Act of 1940, as amended, as an open-end series diversified management
investment company. The Fund is organized as a Maryland corporation consisting
of two different portfolios, each of which offers separate series of shares:
the Prime Portfolio and the Liquid Assets Portfolio. Information presented in
these financial statements pertains only to the Prime Portfolio (the
"Portfolio"), with the assets, liabilities and operations of each portfolio
accounted for separately. The Portfolio currently offers six different classes
of shares: the Institutional Class, the Private Investment Class, the Personal
Investment Class, the Cash Management Class, the Reserve Class and the Resource
Class. Matters affecting each class are voted on exclusively by the
shareholders of each class. The Portfolio is a money market fund whose
objective is the maximization of current income to the extent consistent with
the preservation of capital and the maintenance of liquidity.
   The preparation of financial statements in conformity with generally accepted
accounting principles requires management to make estimates and assumptions
that affect the reported amounts of assets and liabilities at the date of the
financial statements and the reported amounts of revenues and expenses during
the reporting period. Actual results could differ from those estimates. The
following is a summary of the significant accounting policies followed by the
Portfolio in the preparation of its financial statements.
A. Security Valuations - The Portfolio's securities are valued on the basis of
   amortized cost which approximates market value. This method values a
   security at its cost on the date of purchase and thereafter assumes a
   constant amortization to maturity of any discount or premium.
B. Securities Transactions, Investment Income and Distributions - Securities
   transactions are accounted for on a trade date basis. Realized gains or
   losses are computed on the basis of specific identification of the
   securities sold. Interest income, adjusted for amortization of premiums and
   discounts on investments, is accrued daily. Dividends to shareholders are
   declared daily and are paid on the first business day of the following
   month.
C. Federal Income Taxes - The Portfolio intends to comply with the requirements
   of the Internal Revenue Code necessary to qualify as a regulated investment
   company and, as such, will not be subject to federal income taxes on
   otherwise taxable income (including net realized capital gains) which is
   distributed to shareholders. Therefore, no provision for federal income
   taxes is recorded in the financial statements.
D. Expenses - Distribution expenses directly attributable to a class of shares
   are charged to that class' operations. All other expenses which are
   attributable to more than one class are allocated among the classes.

NOTE 2-ADVISORY FEES AND OTHER TRANSACTIONS WITH AFFILIATES

The Fund has entered into a master investment advisory agreement with A I M
Advisors, Inc. ("AIM"). Under the terms of the master investment advisory
agreement, AIM receives a monthly fee with respect to the Portfolio calculated
by applying a monthly rate, based upon the following annual rates, to the
average daily net assets of the Portfolio:

<TABLE>
<CAPTION>
Net Assets                         RATE
- ----------------------------------------
<S>                                <C>
First $100 million                 0.20%
- ----------------------------------------
Over $100 million to $200 million  0.15%
- ----------------------------------------
Over $200 million to $300 million  0.10%
- ----------------------------------------
Over $300 million to $1.5 billion  0.06%
- ----------------------------------------
Over $1.5 billion                  0.05%
- ----------------------------------------
</TABLE>

   The Fund, pursuant to a master administrative services agreement with AIM,
has agreed to pay AIM for certain administrative costs incurred in providing
accounting services to the Fund. During the year ended August 31, 1999, AIM was
paid $258,934 for such services.
   The Fund, pursuant to a transfer agency and service agreement, has agreed to
pay A I M Fund Services, Inc. ("AFS") a fee for providing transfer agent and
shareholder services to the Fund. During the year ended August 31, 1999, AFS
was paid $903,145 for such services.

                                     FS-11
<PAGE>

   Under the terms of a master distribution agreement between Fund Management
Company ("FMC") and the Fund, FMC acts as the exclusive distributor of the
Fund's shares. The Fund has adopted a master distribution plan (the "Plan")
pursuant to Rule 12b-1 under the 1940 Act with respect to the Private
Investment Class, the Personal Investment Class, the Cash Management Class, the
Reserve Class, and the Resource Class of the Portfolio. The Plan provides that
the Private Investment Class, the Personal Investment Class, the Cash
Management Class, the Reserve Class, and the Resource Class pay up to a 0.50%,
0.75%, 0.10%, 1.00%, and 0.20%, respectively, maximum annual rate of the
average daily net assets attributable to such class. Of this amount, the Fund
may pay an asset-based sales charge to FMC and the Fund may pay a service fee
of (a) 0.25% of the average daily net assets of each of the Private Investment
Class, Personal Investment Class, and the Reserve Class, (b) 0.10% of the
average daily net assets of the Cash Management Class and (c) 0.20% of the
average daily net assets of the Resource Class, to selected banks, broker-
dealers and other financial institutions who offer continuing personal
shareholder services to their customers who purchase and own shares of the
Private Investment Class, the Personal Investment Class, the Cash Management
Class, the Reserve Class, or the Resource Class. Any amounts not paid as a
service fee under such Plan would constitute an asset-based sales charge. The
Plan also imposes a cap on the total amount of sales charges, including asset-
based sales charges, that may be paid by the Portfolio with respect to each
class. During the year ended August 31, 1999, the Private Investment Class, the
Personal Investment Class, the Cash Management Class, the Reserve Class, and
the Resource Class paid $1,155,429, $758,574, $935,042, $940,270, and $226,673,
respectively, as compensation under the Plan. FMC waived fees of $1,675,069 for
the same period. Certain officers and directors of the Fund are officers of
AIM, FMC and AFS.
    During the year ended August 31, 1999, the Portfolio paid legal fees of
$20,924 for services rendered by Kramer, Levin, Naftalis & Frankel LLP as
counsel to the Board of Directors. A member of that firm is a director of the
Fund.

NOTE 3-DIRECTORS' FEES

Directors' fees represent remuneration paid to directors who are not an
"interested person" of AIM. The Fund may invest directors' fees, if so elected
by a director, in mutual fund shares in accordance with a deferred compensation
plan.

NOTE 4-SHARE INFORMATION

Changes in shares outstanding during the year ended August 31, 1999 and 1998
were as follows.

<TABLE>
<CAPTION>
                                               1999                                 1998
                                ------------------------------------  ---------------------------------
                                     SHARES             AMOUNT            SHARES            AMOUNT
                                -----------------  -----------------  ---------------  ----------------
<S>                             <C>                <C>                <C>              <C>
Sold:
  Institutional Class             109,937,908,800  $ 109,937,908,800   70,953,094,776  $ 70,953,094,776
- -------------------------------------------------------------------------------------------------------
  Private Investment Class          3,170,645,036      3,170,645,036    2,265,361,261     2,265,361,261
- -------------------------------------------------------------------------------------------------------
  Personal Investment Class         1,878,724,152      1,878,724,152    1,442,106,992     1,442,106,992
- -------------------------------------------------------------------------------------------------------
  Cash Management Class            12,368,423,760     12,368,423,760   10,266,695,255    10,266,695,255
- -------------------------------------------------------------------------------------------------------
  Reserve Class*                      427,972,822        427,972,822               --                --
- -------------------------------------------------------------------------------------------------------
  Resource Class                    4,803,364,271      4,803,364,271    5,571,480,416     5,571,480,416
- -------------------------------------------------------------------------------------------------------
Issued as reinvestment of dividends:
  Institutional Class                  27,367,341         27,367,341       25,834,568        25,834,568
- -------------------------------------------------------------------------------------------------------
  Private Investment Class              9,729,854          9,729,854        6,616,509         6,616,509
- -------------------------------------------------------------------------------------------------------
  Personal Investment Class             7,060,491          7,060,491        5,817,504         5,817,504
- -------------------------------------------------------------------------------------------------------
  Cash Management Class                43,017,293         43,017,293       27,781,043        27,781,043
- -------------------------------------------------------------------------------------------------------
  Reserve Class*                          763,247            763,247               --                --
- -------------------------------------------------------------------------------------------------------
  Resource Class                       24,478,821         24,478,821       16,446,253        16,446,253
- -------------------------------------------------------------------------------------------------------
Reacquired:
  Institutional Class            (109,599,031,637)  (109,599,031,637) (70,728,159,503)  (70,728,159,503)
- -------------------------------------------------------------------------------------------------------
  Private Investment Class         (3,090,291,929)    (3,090,291,929)  (2,212,613,562)   (2,212,613,562)
- -------------------------------------------------------------------------------------------------------
  Personal Investment Class        (1,938,117,905)    (1,938,117,905)  (1,405,052,971)   (1,405,052,971)
- -------------------------------------------------------------------------------------------------------
  Cash Management Class           (12,019,849,792)   (12,019,849,792) (10,199,573,686)  (10,199,573,686)
- -------------------------------------------------------------------------------------------------------
  Reserve Class*                     (306,953,345)      (306,953,345)              --                --
- -------------------------------------------------------------------------------------------------------
  Resource Class                   (4,860,284,432)    (4,860,284,432)  (5,051,247,646)   (5,051,247,646)
- -------------------------------------------------------------------------------------------------------
Net increase                          884,926,848  $     884,926,848      984,587,209  $    984,587,209
=======================================================================================================
</TABLE>
* The Reserve Class commenced sales on January 4, 1999.

                                     FS-12
<PAGE>

INDEPENDENT AUDITORS' REPORT

To the Board of Directors and Shareholders
Short-Term Investments Co.:

We have audited the accompanying statement of assets and liabilities of Prime
Portfolio (a series portfolio of Short-Term Investments Co.), including the
schedule of investments, as of August 31, 1999, and the related statement of
operations for the year then ended, the statement of changes in net assets for
each of the two years in the period then ended, and the financial highlights
for each of the five years in the period then ended. These financial statements
and financial highlights are the responsibility of the Fund's management. Our
reponsibility is to express an opinion on these financial statements and
financial highlights based on our audits.
    We conducted our audits in accordance with generally accepted auditing
standards. 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. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the financial
statements. Our procedures included confirmation of securities owned as of
August 31, 1999 by correspondence with the custodian. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
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
Prime Portfolio as of August 31, 1999, the results of its operations for the
year then ended, the changes in its net assets for each of the two years in the
period then ended, and the financial highlights for each of the five years in
the period then ended, in conformity with generally accepted accounting
principles.


/s/ KPMG LLP
- ---------------------
KPMG LLP

October 1, 1999
Houston, Texas

                                     FS-13
<PAGE>

NOTE 5-FINANCIAL HIGHLIGHTS

Shown below are the financial highlights for a share of Cash Management Class
capital stock outstanding for each of the years in the five-year period ended
August 31, 1999.

<TABLE>
<CAPTION>
                                                           1999          1998      1997      1996      1995
                                                        ----------     --------  --------  --------  --------
<S>                                                    <C>            <C>       <C>       <C>       <C>
Net asset value, beginning of period                    $     1.00     $   1.00  $   1.00  $   1.00  $   1.00
- ------------------------------------------------------- ----------     --------  --------  --------  --------
Income from investment operations:
  Net investment income                                       0.05         0.05      0.05      0.05      0.06
- ------------------------------------------------------- ----------     --------  --------  --------  --------
Less distributions:
  Dividends from net investment income                       (0.05)       (0.05)    (0.05)    (0.05)    (0.06)
- ------------------------------------------------------- ----------     --------  --------  --------  --------
Net asset value, end of period                          $     1.00     $   1.00  $   1.00  $   1.00  $   1.00
======================================================= ==========     ========  ========  ========  ========
Total return                                                  5.07%        5.62%     5.45%     5.55%     5.71%
======================================================= ==========     ========  ========  ========  ========
Ratios/supplemental data:
Net assets, end ofperiod (000s omitted)                 $1,253,799     $862,207  $767,304  $507,247  $194,479
======================================================= ==========     ========  ========  ========  ========
Ratio of expenses to average net assets(a)                    0.17%(b)     0.17%     0.17%     0.17%     0.17%
======================================================= ==========     ========  ========  ========  ========
Ratio of net investment income to average net assets(c)       4.94%(b)     5.48%     5.33%     5.38%     5.69%
======================================================= ==========     ========  ========  ========  ========
</TABLE>
(a) After fee waivers and/or expense reimbursements. Ratios of expenses to
    average net assets prior to fee waivers and/or expense reimbursements were
    0.19%, 0.19%, 0.19%, 0.19% and 0.32% for the periods 1999-1995,
    respectively.
(b) Ratios based on average net assets of $1,168,802,213.
(c) After fee waivers and/or expense reimbursements. Ratios of net investment
    income to average net assets prior to fee waivers and/or expense
    reimbursements were 4.92%, 5.46%, 5.31%, 5.36% and 5.54% for the periods
    1999-1995, respectively.

                                     FS-14
<PAGE>

INDEPENDENT AUDITORS' REPORT

To the Board of Directors and Shareholders
Short-Term Investments Co.:

We have audited the accompanying statement of assets and liabilities of Prime
Portfolio (a series portfolio of Short-Term Investments Co.), including the
schedule of investments, as of August 31, 1999, and the related statement of
operations for the year then ended, the statements of changes in net assets
for each of the two years in the period then ended, and the financial
highlights for each of the five years in the period then ended. These
financial statements and financial highlights are the responsibility of the
Fund's management. Our responsibility is to express an opinion on these
financial statements and financial highlights based on our audits.
 We conducted our audits in accordance with generally accepted auditing
standards. 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. An audit includes
examining, on a test basis, evidence supporting the amounts and disclosures in
the financial statements. Our procedures included confirmation of securities
owned as of August 31, 1999 by correspondence with the custodian. An audit
also includes assessing the accounting principles used and significant
estimates made by management, as well as evaluating the overall financial
statement presentation. 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
Prime Portfolio as of August 31, 1999, the results of its operations for the
year then ended, the changes in its net assets for each of the two years in
the period then ended, and the financial highlights for each of the five years
in the period then ended, in conformity with generally accepted accounting
principles.


/s/ KPMG LLP
- -----------------
KPMG LLP

October 1, 1999
Houston, Texas

                                     FS-15
<PAGE>

NOTE 5-FINANCIAL HIGHLIGHTS

Shown below are the financial highlights for a share of Institutional Class
capital stock outstanding for each of the years in the five-year period ended
August 31, 1999.

<TABLE>
<CAPTION>
                            1999           1998        1997        1996        1995
                         ----------     ----------  ----------  ----------  ----------
<S>                      <C>            <C>         <C>         <C>         <C>
Net asset value,
 beginning of period     $     1.00     $     1.00  $     1.00  $     1.00  $     1.00
- -----------------------  ----------     ----------  ----------  ----------  ----------
Income from investment
 operations:
  Net investment income        0.05           0.06        0.05        0.05        0.06
- -----------------------  ----------     ----------  ----------  ----------  ----------
Less distributions:
  Dividends from net
   investment income          (0.05)         (0.06)      (0.05)      (0.05)      (0.06)
- -----------------------  ----------     ----------  ----------  ----------  ----------
Net asset value, end of
 period                  $     1.00     $     1.00  $     1.00  $     1.00  $     1.00
=======================  ==========     ==========  ==========  ==========  ==========
Total return                   5.15%          5.71%       5.54%       5.64%       5.80%
=======================  ==========     ==========  ==========  ==========  ==========
Ratios/supplemental
 data:
Net assets, end of
 period (000s omitted)   $6,210,056     $5,843,813  $5,593,043  $5,264,601  $3,752,693
=======================  ==========     ==========  ==========  ==========  ==========
Ratio of expenses to
 average net assets            0.09%(a)       0.09%       0.09%       0.09%       0.09%
=======================  ==========     ==========  ==========  ==========  ==========
Ratio of net investment
 income to average net
 assets                        5.02%(a)       5.56%       5.40%       5.48%       5.64%
=======================  ==========     ==========  ==========  ==========  ==========
</TABLE>
(a) Ratios based on average net assets of $7,248,383,889.

                                     FS-16
<PAGE>

INDEPENDENT AUDITORS' REPORT

To the Board of Trustees and Shareholders
Short-Term Investments Co.:

We have audited the accompanying statement of assets and liabilities of Prime
Portfolio (a series portfolio of Short-Term Investments Co.), including the
schedule of investments, as of August 31, 1999, and the related statement of
operations for the year then ended, the statements of changes in net assets for
each of the two years in the period then ended, and the financial highlights
for each of the five years in the period then ended. These financial statements
and financial highlights are the responsibility of the Fund's management. Our
responsibility is to express an opinion on these financial statements and
financial highlights based on our audits.
 We conducted our audits in accordance with generally accepted auditing
standards. 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. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the financial
statements. Our procedures included confirmation of securities owned as of
August 31, 1999 by correspondence with the custodian. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
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 Prime
Portfolio as of August 31, 1999, the results of its operations for the year
then ended, the changes in its net assets for each of the two years in the
period then ended, and the financial highlights for each of the five years in
the period then ended, in conformity with generally accepted accounting
principles.


/s/ KPMG LLP
- -----------------
KPMG LLP

October 1, 1999
Houston, Texas

                                     FS-17
<PAGE>

NOTE 5-FINANCIAL HIGHLIGHTS

Shown below are the financial highlights for a share of Personal Investment
Class capital stock outstanding for each of the years in the five-year period
ended August 31, 1999.

<TABLE>
<CAPTION>
                          1999         1998     1997      1996      1995
                         -------     --------  -------  ---------  -------
<S>                      <C>         <C>       <C>      <C>        <C>
Net asset value,
 beginning of period     $  1.00     $   1.00  $  1.00  $    1.00  $  1.00
- -----------------------  -------     --------  -------  ---------  -------
Income from investment
 operations:
  Net investment income     0.05         0.05     0.05       0.05     0.05
- -----------------------  -------     --------  -------  ---------  -------
Less distributions:
  Dividends from net
   investment income       (0.05)       (0.05)   (0.05)     (0.05)   (0.05)
- -----------------------  -------     --------  -------  ---------  -------
Net asset value, end of
 period                  $  1.00     $   1.00  $  1.00  $    1.00  $  1.00
=======================  =======     ========  =======  =========  =======
Total return                4.63%        5.18%    5.01%      5.11%    5.27%
=======================  =======     ========  =======  =========  =======
Ratios/supplemental
 data:
Net assets, end of
 period (000s omitted)   $87,754     $140,087  $97,215   $112,645  $99,630
=======================  =======     ========  =======  =========  =======
Ratio of expenses to
 average net assets(a)      0.59%(b)     0.59%    0.59%      0.59%    0.59%
=======================  =======     ========  =======  =========  =======
Ratio of net investment
 income to average net
 assets(c)                  4.52%(b)     5.06%    4.89%      4.99%    5.23%
=======================  =======     ========  =======  =========  =======
</TABLE>
(a) After fee waivers and/or expense reimbursement. Ratios of expenses to
    average net assets prior to fee waivers and/or expense reimbursements were
    0.84%, 0.84%, 0.84%, 0.89% and 0.86% for the periods 1999-1995,
    respectively.
(b) Ratios based on average net assets of $151,714,818.
(c) After fee waivers and/or expense reimbursement. Ratios of net investment
    income to average net assets prior to fee waivers and/or expense
    reimbursements were 4.27%, 4.81%, 4.64%, 4.69% and 4.96% for the periods
    1999-1995, respectively.

                                    FS-18
<PAGE>

INDEPENDENT AUDITORS' REPORT

To the Board of Directors and Shareholders
Short-Term Investments Co.:

We have audited the accompanying statement of assets and liabilities of Prime
Portfolio (a series portfolio of Short-Term Investments Co.), including the
schedule of investments, as of August 31, 1999, and the related statement of
operations for the year then ended, the statement of changes in net assets for
each of the two years in the period then ended, and the financial highlights
for each of the five years in the period then ended. These financial statements
and financial highlights are the responsibility of the Fund's management. Our
responsibility is to express an opinion on these financial statements and
financial highlights based on our audits.
 We conducted our audits in accordance with generally accepted auditing
standards. 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. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the financial
statements. Our procedures included confirmation of securities owned as of
August 31, 1999 by correspondence with the custodian. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
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 Prime
Portfolio as of August 31, 1999, the results of its operations for the year
then ended, the changes in its net assets for each of the two years in the
period then ended, and the financial highlights for each of the five years in
the period then ended, in conformity with generally accepted accounting
principles.


/s/ KPMG LLP
- -----------------
KPMG LLP

October 1, 1999
Houston, Texas

                                     FS-19
<PAGE>

NOTE 5-FINANCIAL HIGHLIGHTS

Shown below are the financial highlights for a share of Private Investment
Class capital stock outstanding for each of the years in the five-year period
ended August 31, 1999.

<TABLE>
<CAPTION>
                             1999         1998      1997      1996      1995
                           --------     --------  --------  --------  --------
<S>                        <C>          <C>       <C>       <C>       <C>
Net asset value,
 beginning of period       $   1.00     $   1.00  $   1.00  $   1.00  $   1.00
- -------------------------  --------     --------  --------  --------  --------
Income from investment
 operations:
  Net investment income        0.05         0.05      0.05      0.05      0.05
- -------------------------  --------     --------  --------  --------  --------
Less distributions:
  Dividends from net
   investment income          (0.05)       (0.05)    (0.05)    (0.05)    (0.05)
- -------------------------  --------     --------  --------  --------  --------
Net asset value, end of
 period                    $   1.00     $   1.00  $   1.00  $   1.00  $   1.00
=========================  ========     ========  ========  ========  ========
Total return                   4.84%        5.39%     5.21%     5.32%     5.48%
=========================  ========     ========  ========  ========  ========
Ratios/supplemental data:
Net assets, end of period
 (000s omitted)            $384,894     $294,811  $235,447  $209,443  $154,278
=========================  ========     ========  ========  ========  ========
Ratio of expenses to
 average net assets(a)         0.39%(b)     0.39%     0.39%     0.39%     0.39%
=========================  ========     ========  ========  ========  ========
Ratio of net investment
 income to average net
 assets(c)                     4.72%(b)     5.26%     5.10%     5.20%     5.50%
=========================  ========     ========  ========  ========  ========
</TABLE>
(a) After fee waivers and/or expense reimbursements. Ratios of expenses to
    average net assets prior to fee waivers and/or expense reimbursements were
    0.59%, 0.59%, 0.59%, 0.59% and 0.60% for the periods 1999-1995,
    respectively.
(b) Ratios based on average net assets of $385,143,051.
(c) After fee waivers and/or expense reimbursements. Ratios of net investment
    income to average net assets prior to fee waivers and/or expense
    reimbursements were 4.52%, 5.06%, 4.90%, 5.00% and 5.29% for the periods
    1999-1995, respectively.

                                    FS-20
<PAGE>

INDEPENDENT AUDITORS' REPORT

To the Board of Directors and Shareholders
Short-Term Investments Co.:

We have audited the accompanying statement of assets and liabilities of Prime
Portfolio (a series portfolio of Short-Term Investments Co.), including the
schedule of investments, as of August 31, 1999, and the related statement of
operations for the year then ended, the statement of changes in net assets for
each of the two years in the period then ended, and the financial highlights
for the period January 4, 1999 (date sales commenced for the Reserve Class)
through August 31, 1999. These financial statements and financial highlights
are the responsibility of the Fund's management. Our reponsibility is to
express an opinion on these financial statements and financial highlights based
on our audits.
 We conducted our audits in accordance with generally accepted auditing
standards. 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. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the financial
statements. Our procedures included confirmation of securities owned as of
August 31, 1999 by correspondence with the custodian. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
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 Prime
Portfolio as of August 31, 1999, the results of its operations for the year
then ended, the changes in its net assets for each of the two years in the
period then ended, and the financial highlights for the period January 4, 1999
(date sales commenced for the Reserve Class) through August 31, 1999, in
conformity with generally accepted accounting principles.


/s/ KPMG LLP
- ------------------
KPMG LLP

October 1, 1999
Houston, Texas

                                     FS-21
<PAGE>

NOTE 5 - FINANCIAL HIGHLIGHTS

Shown below are the financial highlights for a share of the Reserve Class
outstanding during the period January 4, 1999 (date sales commenced) through
August 31, 1999.

<TABLE>
<CAPTION>
                                                         AUGUST 31,
                                                            1999
                                                         ----------
<S>                                                      <C>
Net asset value, beginning of period                      $   1.00
- -------------------------------------------------------   --------
Income from investment operations:
  Net investment income                                       0.03
- -------------------------------------------------------   --------
Less distributions:
  Dividends from net investment income                       (0.03)
- -------------------------------------------------------   --------
Net asset value, end of period                            $   1.00
=======================================================   ========
Total return(a)                                               2.73%
=======================================================   ========
Ratios/supplemental data:
Net assets, end of period (000s omitted)                  $121,783
=======================================================   ========
Ratio of expenses to average net assets(b)                    0.89%(c)
=======================================================   ========
Ratio of net investment income to average net assets(d)       4.22%(c)
=======================================================   ========
</TABLE>
(a) Not annualized for periods less than one year.
(b) After fee waivers and/or expense reimbursements. Ratio of expenses to
    average net assets prior to fee waivers and/or expense reimbursements was
    1.09% (annualized).
(c) Ratios are annualized and based on average net assets of $42,559,418.
(d) After fee waivers and/or expense reimbursements. Ratios of net investment
    income to average net assets prior to fee waivers and/or expense
    reimbursements was 4.02% (annualized).

                                     FS-22
<PAGE>

INDEPENDENT AUDITORS' REPORT

To the Board of Directors and Shareholders
Short-Term Investments Co.:

We have audited the accompanying statement of assets and liabilities of Prime
Portfolio (a series portfolio of Short-Term Investments Co.), including the
schedule of investments, as of August 31, 1999, and the related statement of
operations for the year then ended, the statement of changes in net assets for
each of the two years in the period then ended, and the financial highlights
for each of the three years in the period then ended and the period January 16,
1996 (date sales commenced for the Resource Class) through August 31, 1996.
These financial statements and financial highlights are the responsibility of
the Fund's management. Our reponsibility is to express an opinion on these
financial statements and financial highlights based on our audits.
 We conducted our audits in accordance with generally accepted auditing
standards. 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. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the financial
statements. Our procedures included confirmation of securities owned as of
August 31, 1999 by correspondence with the custodian. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
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 Prime
Portfolio as of August 31, 1999, the results of its operations for the year
then ended, the changes in its net assets for each of the two years in the
period then ended, and the financial highlights for each of the three years in
the period then ended and the period January 16, 1996 (date sales commenced for
the Resource Class) through August 31, 1996, in conformity with generally
accepted accounting principles.


/s/ KPMG LLP
- -------------------
KPMG LLP

October 1, 1999
Houston, Texas

                                     FS-23
<PAGE>

NOTE 5-FINANCIAL HIGHLIGHTS

Shown below are the financial highlights for a share of Resource Class capital
stock outstanding for each of the years in the three-year period ended August
31, 1999 and the period January 16, 1996 (date sales commenced) through
August 31, 1996.

<TABLE>
<CAPTION>
                                     1999         1998      1997     1996
                                   --------     --------  --------  -------
<S>                                <C>          <C>       <C>       <C>
Net asset value, beginning of
 period                            $   1.00     $   1.00  $   1.00  $  1.00
- ---------------------------------  --------     --------  --------  -------
Income from investment
 operations:
  Net investment income                0.05         0.05      0.05     0.03
- ---------------------------------  --------     --------  --------  -------
Less distributions:
  Dividends from net investment
   income                             (0.05)       (0.05)    (0.05)   (0.03)
- ---------------------------------  --------     --------  --------  -------
Net asset value, end of period     $   1.00     $   1.00  $   1.00  $  1.00
=================================  ========     ========  ========  =======
Total return                           4.99%        5.54%     5.36%    3.28%
=================================  ========     ========  ========  =======
Ratios/supplemental data:
Net assets, end of period (000s
 omitted)                          $665,939     $698,380  $161,701  $58,012
=================================  ========     ========  ========  =======
Ratio of expenses to average net
 assets(a)                             0.25%(b)     0.25%     0.25%    0.25%(c)
=================================  ========     ========  ========  =======
Ratio of net investment income to
 average net assets(d)                 4.86%(b)     5.40%     5.25%    5.18%(c)
=================================  ========     ========  ========  =======
</TABLE>
(a) After fee waivers and/or expense reimbursements. Ratios of expenses to
    average net assets prior to fee waivers and/or expense reimbursement were
    0.29%, 0.29%, 0.29% and 0.29% (annualized) for the periods 1999-1996,
    respectively.
(b) Ratios based on average net assets of $587,668,917.
(c) Annualized.
(d) After fee waivers and/or expense reimbursements. Ratios of net investment
    income to average net assets prior to fee waivers and/or expense
    reimbursements were 4.82%, 5.36%, 5.21% and 5.14% (annualized) for the
    periods 1999-1996, respectively.

                                    FS-24
<PAGE>

                                    PART C
                               OTHER INFORMATION


Item 23       Exhibits

    Exhibit
    Number
    ------

    a(1)  -  (a)  Articles of Incorporation of Registrant, as filed with the
                  State of Maryland on May 3, 1993, were filed as an Exhibit to
                  Registrant's initial Registration Statement on July 19, 1993,
                  and were filed electronically as an Exhibit to Post-Effective
                  Amendment No. 4 on November 8, 1995, and are hereby
                  incorporated by reference.

          -  (b)  Certificate of Correction of Registrant, as filed with the
                  State of Maryland on June 10, 1993, was filed as an Exhibit to
                  Registrant's initial Registration Statement on July 19, 1993,
                  and was filed electronically as an Exhibit to Post-Effective
                  Amendment No. 4 on November 8, 1995, and is hereby
                  incorporated by reference.

          -  (c)  Articles of Amendment of Registrant, as filed with the State
                  of Maryland on October 15, 1993, were filed as an Exhibit to
                  Registrant's Post-Effective Amendment No. 2 on August 22,
                  1994, and were filed electronically as an Exhibit to Post-
                  Effective Amendment No. 4 on November 8, 1995, and are hereby
                  incorporated by reference.

          -  (d)  Articles Supplementary of Registrant, as filed with the State
                  of Maryland on October 10, 1995, were filed electronically as
                  an Exhibit to Post-Effective Amendment No. 4 on November 8,
                  1995, and are hereby incorporated by reference.

          -  (e)  Articles Supplementary of Registrant, as filed with the State
                  of Maryland on November 6, 1995, were filed electronically as
                  an Exhibit to Post-Effective Amendment No. 4 on November 8,
                  1995, and are hereby incorporated by reference.

          -  (f)  Articles of Amendment of Registrant, as filed with the State
                  of Maryland on November 6, 1995, were filed electronically as
                  an Exhibit to Post-Effective Amendment No. 4 on November 8,
                  1995, and are hereby incorporated by reference.

          -  (g)  Certificate of Correction of Registrant, as filed with the
                  State of Maryland on November 8, 1995, was filed
                  electronically as an Exhibit to Post-Effective Amendment No. 4
                  on November 8, 1995, and is hereby incorporated by reference.

          -  (h)  Certificate of Correction of Registrant, as filed with the
                  State of Maryland on August 5, 1996, was filed electronically
                  as an Exhibit to Post-Effective Amendment No. 7 on December
                  23, 1996, and is hereby incorporated by reference.

          -  (i)  Certificate of Correction of Registrant, as filed with the
                  State of Maryland on August 5, 1996, was filed electronically
                  as an Exhibit to Post-Effective Amendment No. 7 on December
                  23, 1996, and is hereby incorporated by reference.

                                      C-1
<PAGE>

          -  (j)  Articles Supplementary of Registrant as filed with the State
                  of Maryland on August 7, 1996, were filed electronically as an
                  Exhibit to Post-Effective Amendment No. 7 on December 23,
                  1996, and are hereby incorporated by reference.

          -  (k)  Articles Supplementary of Registrant as filed with the State
                  of Maryland on June 12, 1997, were filed electronically as an
                  Exhibit to Post-Effective Amendment No. 8 on December 17,
                  1997, and are hereby incorporated by reference.

          -  (l)  Articles of Amendment of Registrant, as filed with the State
                  of Maryland on October 1, 1998, were filed electronically as
                  an Exhibit to Post-Effective Amendment No. 9 on November 25,
                  1998, and are hereby incorporated by reference.

          -  (m)  Articles Supplementary of Registrant, as filed with the State
                  of Maryland on November 5, 1998, were filed electronically as
                  an Exhibit to Post-Effective Amendment No. 9 on November 25,
                  1998, and are hereby incorporated by reference.

          -  (n)  Articles Supplementary of Registrant, as filed with the State
                  of Maryland on June 9, 1999, are filed herewith
                  electronically.

    b(1)  -  (a)  By-Laws of Registrant were filed as an exhibit to Registrant's
                  initial Registration Statement on July 19, 1993, and were
                  filed electronically as an Exhibit to Post-Effective Amendment
                  No. 4 on November 8, 1995.

          -  (b)  First Amendment, dated March 14, 1995, to By-Laws of
                  Registrant was filed electronically as an Exhibit to Post-
                  Effective Amendment No. 4 on November 8, 1995.

     (2)  -  (a)  Amended and Restated By-Laws of Registrant, dated December 11,
                  1996, were filed electronically as an Exhibit to Post-
                  Effective Amendment No. 8 on December 17, 1997, and are hereby
                  incorporated by reference.

          -  (b)  First Amendment, dated June 9, 1999, to By-Laws of Registrant,
                  are filed herewith electronically.

    c(1)  -       Form of Specimen Certificate for Liquid Assets Portfolio was
                  filed as an exhibit to Registrant's Pre-Effective Amendment
                  No. 1 on October 1, 1993, and is hereby incorporated by
                  reference.

     (2)  -       Form of Specimen Certificate for Prime Portfolio - Cash
                  Management Class was filed as an exhibit to Registrant's Post-
                  Effective Amendment No. 1 on October 15, 1993, and is hereby
                  incorporated by reference.

     (3)  -       Form of Specimen Certificate for Prime Portfolio -
                  Institutional Class was filed as an exhibit to Registrant's
                  Post-Effective Amendment No. 1 on October 15, 1993, and is
                  hereby incorporated by reference.

     (4)  -       Form of Specimen Certificate for Prime Portfolio - Personal
                  Investment Class was filed as an exhibit to Registrant's Post-
                  Effective Amendment No. 1 on October 15, 1993, and is hereby
                  incorporated by reference.

                                      C-2
<PAGE>

     (5)  -       Form of Specimen Certificate for Prime Portfolio - Private
                  Investment Class was filed as an exhibit to Registrant's Post-
                  Effective Amendment No. 1 on October 15, 1993, and is hereby
                  incorporated by reference.

     (6)  -       Form of Specimen Certificate for Prime Portfolio - Resource
                  Class was filed electronically as an Exhibit to Post-Effective
                  Amendment No. 4 on November 8, 1995, and is hereby
                  incorporated by reference.

     (7)  -       Form of Specimen Certificate for Liquid Assets Portfolio -
                  Cash Management Class was filed electronically as an Exhibit
                  to Post-Effective Amendment No. 4 on November 8, 1995, and is
                  hereby incorporated by reference.

     (8)  -       Form of Specimen Certificate for Liquid Assets Portfolio -
                  Private Investment Class was filed electronically as an
                  Exhibit to Post-Effective Amendment No. 4 on November 8, 1995,
                  is hereby incorporated by reference.

    d(1)  -       Master Investment Advisory Agreement between Registrant and
                  A I M Advisors, Inc. dated August 6, 1993 was filed as an
                  Exhibit to Registrant's Post-Effective Amendment No. 1 on
                  October 15, 1993.

     (2)  -       Master Investment Advisory Agreement, dated October 18, 1993,
                  between Registrant and A I M Advisors, Inc. was filed as an
                  Exhibit to Registrant's Post-Effective Amendment No. 2 on
                  August 22, 1994, and was filed electronically as an Exhibit to
                  Post-Effective Amendment No. 4 on November 8, 1995.

     (3)  -       Master Investment Advisory Agreement dated February 28, 1997,
                  between Registrant and A I M Advisors, Inc. was filed
                  electronically as an Exhibit to Post-Effective Amendment No. 8
                  on December 17, 1997, and is hereby incorporated by reference.

    e(1)  -       Master Distribution Agreement between Registrant and Fund
                  Management Company dated August 6, 1993 was filed as an
                  Exhibit to Registrant's Post-Effective Amendment No. 1 on
                  October 15, 1993.

     (2)  -  (a)  Master Distribution Agreement between Registrant and Fund
                  Management Company, dated October 18, 1993, was filed as an
                  exhibit to Registrant's Post-Effective Amendment No. 2 on
                  August 22, 1994, and was filed electronically as an Exhibit to
                  Post-Effective Amendment No. 4 on November 8, 1995.

             (b)  Amendment No. 1, dated September 19, 1995, to Master
                  Distribution Agreement between Registrant and Fund Management
                  Company, dated October 18, 1993, was filed electronically as
                  an Exhibit to Post-Effective Amendment No. 4 on November 8,
                  1995.

             (c)  Amendment No. 2, dated as of December 4, 1995, to Master
                  Distribution Agreement between Registrant and Fund Management
                  Company, dated October 18, 1993, was filed electronically as
                  an Exhibit to Post-Effective Amendment No. 5 on July 9, 1996.

             (d)  Amendment No. 3, dated June 11, 1996, to Master Distribution
                  Agreement between Registrant and Fund Management Company,
                  dated October 18, 1993, was filed electronically as an Exhibit
                  to Post-Effective Amendment No. 7 on December 23, 1996.

     (3)  -  (a)  Master Distribution Agreement between Registrant and Fund
                  Management Company dated February 28, 1997 was filed
                  electronically as an Exhibit to Post-

                                      C-3
<PAGE>


                  Effective Amendment No. 8 on December 17, 1997, and is hereby
                  incorporated by reference.

             (b)  Amendment No. 1 to Master Distribution Agreement between
                  Registrant and Fund Management Company dated February 28, 1997
                  is filed herewith electronically.

    f(1)  -       Retirement Plan for Eligible Directors/Trustees was filed as
                  an exhibit to Registrant's Post-Effective Amendment No. 2 on
                  August 22, 1994, and is hereby incorporated by reference.

     (2)  -       Form of Deferred Compensation Agreement was filed as an
                  exhibit to Registrant's Post-Effective Amendment No. 2 on
                  August 22, 1994, and was filed electronically as an Exhibit to
                  Post-Effective Amendment No. 7 on December 23, 1996.

     (3)  -       Form of Deferred Compensation Agreement was filed
                  electronically as an Exhibit to Post-Effective Amendment No. 8
                  on December 17, 1997, and is hereby incorporated by reference.

    g(1)  -  (a)  Second Amended and Restated Custodian Agreement between the
                  Registrant and The Bank of New York, dated June 16, 1987, was
                  filed as an Exhibit to Registrant's Post-Effective Amendment
                  No. 2 on August 22, 1994, and was filed electronically as an
                  Exhibit to Post-Effective Amendment No. 7 on December 23,
                  1996, and is hereby incorporated by reference.

          -  (b)  Amendment No. 1, dated May 17, 1993, to Second Amended and
                  Restated Custodian Agreement between Registrant and The Bank
                  of New York, dated June 16, 1987, was filed as an Exhibit to
                  Registrant's Post-Effective Amendment No. 2 on August 22,
                  1994, and was filed electronically as an Exhibit to Post-
                  Effective Amendment No. 7 on December 23, 1996, and is hereby
                  incorporated by reference.

          -  (c)  Assignment and Acceptance of Assignment, dated October 15,
                  1993, to Second Amended and Restated Custodian Agreement,
                  dated June 16, 1987, was filed as an Exhibit to Registrant's
                  Post-Effective Amendment No. 2 on August 22, 1994, and was
                  filed electronically as an Exhibit to Post-Effective Amendment
                  No. 7 on December 23, 1996, and is hereby incorporated by
                  reference.

          -  (d)  Amendment No. 2, dated October 19, 1993, to Second Amended and
                  Restated Custodian Agreement, dated June 16, 1987, was filed
                  as an Exhibit to Registrant's Post-Effective Amendment No. 2
                  on August 22, 1994, and was filed electronically as an Exhibit
                  to Post-Effective Amendment No. 7 on December 23, 1996, and is
                  hereby incorporated by reference.

          -  (e)  Letter Agreement, dated July 30, 1996, to Second Amended and
                  Restated Custodian Agreement, dated June 16, 1987, and was
                  filed electronically as an Exhibit to Post-Effective Amendment
                  No. 7 on December 23, 1996, and is hereby incorporated by
                  reference.

    h(1)  -       Transfer Agency Agreement between the Registrant and State
                  Street Bank and Trust Company, dated October 15, 1993 was
                  filed as an exhibit to Registrant's Post-Effective Amendment
                  No. 2 on August 22, 1994.

     (2)  -  (a)  Transfer Agency and Service Agreement between A I M
                  Institutional Fund Services, Inc. and Registrant, dated
                  September 16, 1994, was filed

                                      C-4
<PAGE>

                  electronically as an Exhibit to Post-Effective Amendment No. 4
                  on November 8, 1995.

          -  (b)  Amendment No.1, dated July 1, 1995, to Transfer Agency and
                  Service Agreement between A I M Institutional Fund Services,
                  Inc. and Registrant, dated September 16, 1994, was filed
                  electronically as an Exhibit to Post-Effective Amendment No. 4
                  on November 8, 1995.

          -  (c)  Amendment No. 2, dated July 1, 1996, to Transfer Agency and
                  Service Agreement between A I M Institutional Fund Services,
                  Inc. and Registrant, dated September 16, 1994, was filed
                  electronically as an Exhibit to Post-Effective Amendment No. 8
                  on December 17, 1997.

          -  (d)  Amendment No. 3, dated July 1, 1997, to Transfer Agency and
                  Service Agreement between A I M Institutional Fund Services,
                  Inc. and Registrant, dated September 16, 1994, was filed
                  electronically as an Exhibit to Post-Effective Amendment No. 8
                  on December 17, 1997.

     (3)  -  (a)  Transfer Agency and Service Agreement, dated December 29,
                  1997, between A I M Fund Services, Inc. and Registrant was
                  filed electronically as an Exhibit to Post-Effective Amendment
                  No. 9 on November 25, 1998, and is hereby incorporated by
                  reference.

             (b)  Amendment No. 1, dated January 1, 1999, to Transfer Agency and
                  Service Agreement, between A I M Fund Services, Inc. and
                  Registrant is filed herewith electronically.

             (c)  Amendment No. 2, dated July 1, 1999, to Transfer Agency and
                  Service Agreement, between A I M Fund Services, Inc. and
                  Registrant is filed herewith electronically.


     (4)  -       Master Administrative Services Agreement between the
                  Registrant and A I M Advisors, Inc. dated August 6, 1993 was
                  filed as an exhibit to Registrant's Post-Effective Amendment
                  No. 1 on October 15, 1993.

     (5)  -  (a)  Master Administrative Services Agreement between the
                  Registrant and A I M Advisors, Inc., dated October 18, 1993,
                  was filed as an Exhibit to Registrant's Post-Effective
                  Amendment No. 2 on August 22, 1994, and was filed
                  electronically as an Exhibit to Post-Effective Amendment No. 4
                  on November 8, 1995.

          -  (b)  Amendment No. 1, dated November 2, 1995, to Master
                  Administrative Services Agreement between the Registrant and
                  A I M Advisors, Inc., dated October 18, 1993, was filed
                  electronically as an Exhibit to Post-Effective Amendment No. 4
                  on November 8, 1995.

          -  (c)  Amendment No. 2, dated as of December 4, 1995, to Master
                  Administrative Services Agreement between the Registrant and
                  A I M Advisors, Inc., dated October 18, 1993, was filed
                  electronically as an Exhibit to Post-Effective Amendment No. 5
                  on July 9, 1996.

          -  (d)  Amendment No. 3, dated June 11, 1996, to Master Administrative
                  Services Agreement between the Registrant and A I M Advisors,
                  Inc. dated October 18, 1993, was filed electronically as an
                  Exhibit to Post-Effective Amendment No. 7 on December 23,
                  1996.

                                      C-5
<PAGE>

     (6)  -  (a)  Master Administrative Services Agreement between the
                  Registrant and A I M Advisors, Inc., dated February 28, 1997,
                  was filed electronically as an Exhibit to Post-Effective
                  Amendment No. 8 on December 17, 1997, and is hereby
                  incorporated by reference.

          -  (b)  Administrative Service Agreement between A I M Advisors, Inc.
                  and A I M Fund Services, Inc., dated October 18, 1993, as
                  amended on May 11, 1994, was filed as an exhibit to
                  Registrant's Post-Effective Amendment No. 2 on August 22,
                  1994.

          -  (c)  Amendment No. 2 to Administrative Services Agreement between
                  A I M Advisors, Inc. and A I M Fund Services, Inc., dated
                  October 18, 1993, as amended on May 11, 1994, was filed as an
                  Exhibit to Registrant's Post-Effective Amendment No. 3 on
                  December 21, 1994.

          -  (d)  Amendment No. 3 to Administrative Services Agreement between
                  A I M Advisors, Inc. and A I M Fund Services, Inc., dated
                  October 18, 1993, as amended on May 11, 1994, was filed as an
                  Exhibit to Registrant's Post-Effective Amendment No. 3 on
                  December 21, 1994.

          -  (e)  Form of Administrative Services Agreement between A I M
                  Advisors, Inc. and A I M Institutional Fund Services, Inc., on
                  behalf of the Portfolios and Classes of the Registrant was
                  filed as an Exhibit to Registrant's Post-Effective Amendment
                  No. 3 on December 21, 1994.

     (7)  -       Form of Memorandum of Agreement, between Registrant and Fund
                  Management Company

    i     -       Consent of Ballard Spahr Andrews & Ingersoll, LLP is filed
                  herewith electronically.

    j     -       Consent of KPMG LLP is filed herewith electronically.

    k     -       Financial Statements - None.

    l     -       Agreements Concerning Initial Capitalization - None.

    m(1)  -       Master Distribution Plan Pursuant to Rule 12b-1 under the 1940
                  Act for Registrant's Prime Portfolio - Personal Investment
                  Class, Private Investment Class and Cash Management Class, and
                  related forms of agreements were filed as an Exhibit to
                  Registrant's Post-Effective Amendment No. 3 on December 21,
                  1994 and were filed electronically as an Exhibit to Post-
                  Effective Amendment No. 4 on November 8, 1995.

     (2)  -  (a)  Master Distribution Plan Pursuant to Rule 12b-1 under the 1940
                  Act, dated August 6, 1993, amended as of September 19, 1995
                  and December 4, 1995, and amended and restated as of December
                  4, 1995, for Registrant's Prime Portfolio - Personal
                  Investment Class, Private Investment Class, Resource Class and
                  Cash Management Class and Registrant's Liquid Assets
                  Portfolio - Private Investment Class and Cash Management
                  Class, and related forms of agreements were filed
                  electronically as an Exhibit to Post-Effective Amendment No. 5
                  on July 9, 1996.

             (b)  Amendment No. 1, dated June 11, 1996, to Master Distribution
                  Plan Pursuant to Rule 12b-1 under the 1940 Act Amended and
                  Restated as of December 4, 1995, for Registrant's Liquid
                  Assets Portfolio - MSTC Cash Reserves Class was

                                      C-6
<PAGE>

                  filed electronically as an Exhibit to Post-Effective Amendment
                  No. 7 on December 23, 1996.

     (3)  -  (a)  Amended and Restated Master Distribution Plan Pursuant to Rule
                  12b-1, amended and restated as of June 30, 1997, for
                  Registrant was filed electronically as an Exhibit to Post-
                  Effective Amendment No. 8 on December 17, 1997, and is hereby
                  incorporated by reference.

          -  (b)  Amendment No. 1, dated December 18, 1998, to Amended and
                  Restated Master Distribution Plan pursuant to Rule 12b-1 for
                  Registrant is filed herewith electronically.

     (4)  -       Form of Shareholder Service Agreement to be used in connection
                  with Registrant's Amended and Restated Master Distribution
                  Plan, as amended, was filed electronically as an Exhibit to
                  Post-Effective Amendment No. 9 on November 25, 1998, and is
                  hereby incorporated by reference.

    n(1)  -  (a)  Multiple Class (Rule 18f-3) Plan was filed as an Exhibit to
                  Post-Effective Amendment No. 7 on December 23, 1996.

          -  (b)  Amended and Restated Multiple Class (Rule 18f-3) Plan was
                  filed electronically as an Exhibit to Post-Effective Amendment
                  No. 8 on December 17, 1997, and is hereby incorporated by
                  reference.

          -  (c)  Second Amended and Restated Multiple Class (Rule 18f-3) Plan
                  was filed electronically as an Exhibit to Post-Effective
                  Amendment No. 8 on December 17, 1997, and is hereby
                  incorporated by reference.

          -  (d)  Third Amended and Restated Multiple Class (Rule 18f-3) Plan,
                  is filed herewith electronically.

    o(1)  -       The AIM Management Group Code of Ethics adopted May 1, 1981
                  and as amended August 17, 1999 relating to A I M Management
                  Group Inc. and A I M Advisors, Inc., is filed herewith
                  electronically.

     (2)  -       Code of Ethics - None.

Item 24.  Persons Controlled by or Under Common Control with Registrant

     Provide a list or diagram of all persons directly or indirectly controlled
by or under common control with the Registrant.  For any person controlled by
another person, disclose the percentage of voting securities owned by the
immediately controlling person or other basis of that person's control.  For
each company, also provide the state or other sovereign power under the laws of
which the company is organized.

          None.

Item 25.  Indemnification

     State the general effect of any contract, arrangement or statute under
which any director, officer, underwriter or affiliated person of the Registrant
is insured or indemnified against any liability incurred in their official
capacity, other than insurance provided by any director, officer, affiliated
person or underwriter for their own protection.

     Under the terms of the Maryland General Corporation Law and the
     Registrant's Charter and By-Laws, the Registrant may indemnify any person
     who was or is a director, officer, employee or agent

                                      C-7
<PAGE>

     of the Registrant to the maximum extent permitted by the Maryland General
     Corporation Law. The specific terms of such indemnification are reflected
     in the Registrant's Charter and By-Laws, which are incorporated herein as
     part of this Registration Statement. No indemnification will be provided by
     the Registrant to any director or officer of the Registrant for any
     liability to the Registrant or shareholders to which such director or
     officer would otherwise be subject by reason of willful misfeasance, bad
     faith, gross negligence or reckless disregard of duty.

     Insofar as indemnification for liability arising under the Securities Act
     of 1933 may be permitted to directors, officers and controlling persons of
     the Registrant pursuant to the foregoing provisions, or otherwise, the
     Registrant has been advised that in the opinion of the Securities and
     Exchange Commission such indemnification is against public policy and is,
     therefore, unenforceable.  In the event that a claim for indemnification
     against such liabilities (other than the payment by the Registrant of
     expenses incurred or paid by a director, officer or controlling person of
     the Registrant in the successful defense of any action, suit or proceeding)
     is asserted by such director, officer or controlling person in connection
     with the securities being registered hereby, the Registrant will, unless in
     the opinion of its counsel the matter has been settled by controlling
     precedent, submit to a court of appropriate jurisdiction the question
     whether such indemnification by it is against public policy as expressed in
     such Act and will be governed by the final adjudication of such issue.
     Insurance coverage is provided under a joint Mutual Fund & Investment
     Advisory Professional Directors & Officers Liability Policy, issued by ICI
     Mutual Insurance Company, with a $35,000,000 limit of liability.

Item 26.  Business and Other Connections of Investment Advisor

     Describe any other business, profession, vocation or employment of a
substantial nature that each investment advisor and each director, officer or
partner of any such investment advisor, is or has been, engaged within the last
two fiscal years, for his or her own account or in the capacity of director,
officer, employee, partner, or trustee.

     The only employment of a substantial nature of the Advisor's directors and
     officers is with the Advisor and its affiliated companies.  Reference is
     also made to the discussion under the captions "Fund Management" of the
     Prospectus which comprises Part A of this Registration Statement, and to
     the discussion under the caption "General Information about the Fund--
     Investment Advisor" of the Statement of Additional Information which
     comprises Part B of this Registration Statement, and to Item 29(b) of this
     Part C of the Registration Statement.

Item 27.  Principal Underwriters

     (a)  State the name of each investment company (other than Registrant) for
          which each principal underwriter currently distributing the
          Registrant's securities also acts as a principal underwriter,
          depositor, or investment advisor.

          Fund Management Company, the Registrant's principal underwriter, also
          acts as a principal underwriter to the following investment companies:

          AIM Equity Funds, Inc. (Institutional Classes)
          AIM Investment Securities Fund (AIM Limited Maturity Treasury Fund -
          Institutional Class)
          Short-Term Investments Trust
          Tax-Free Investments Co.

     (b)  Provide the information required by the following tables for each
          director, officer or partner of each principal underwriter named in
          response to Item 20.

          The following table sets forth information with respect to each
          director and officer of Fund Management Company:

                                      C-8
<PAGE>

Name and Principal       Position and Offices             Position and Offices
Business Address*        with Principal Underwriter       with Registrant
- ----------------         --------------------------       --------------------

Charles T. Bauer         Chairman of the Board of         Chairman and Director
                         Directors

J. Abbott Sprague        President and Director           Vice President

Robert H. Graham         Senior Vice President and        Director and President
                         Director

Mark D. Santero          Senior Vice President            None

William J. Wendel        Senior Vice President            None

Melville B. Cox          Vice President &                 Vice President
                         Chief Compliance Officer

Carol F. Relihan         Vice President,                  Senior Vice President
                         General Counsel and Director     & Secretary

Dawn M. Hawley           Vice President and Treasurer     None

Lisa A. Moss             Vice President, Assistant        Assistant Secretary
                         General Counsel and Assistant
                         Secretary

Stephen I. Winer         Vice President, Assistant        Assistant Secretary
                         General Counsel & Assistant
                         Secretary

James R. Anderson        Vice President                   None

Kathleen J. Pflueger     Secretary                        Assistant Secretary

David E. Hessel          Assistant Vice President,        None
                         Assistant Treasurer &
                         Controller

Rebecca Starling-        Assistant Vice President         None
Klatt

Jeffrey L. Horne         Assistant Vice President         None

Robert W. Morris,        Assistant Vice President         None
Jr.

Ann M. Srubar            Assistant Vice President         None

Dana R. Sutton           Assistant Vice President         Vice President &
                         & Assistant Treasurer            Treasurer

Nicholas D. White        Assistant Vice President         None

Nancy L. Martin          Assistant General Counsel &      Assistant Secretary
                         Assistant Secretary

Ofelia M. Mayo           Assistant General Counsel &      Assistant Secretary
                         Assistant Secretary

Samuel D. Sirko          Assistant General Counsel &      Assistant Secretary
                         Assistant Secretary

P. Michelle Grace        Assistant Secretary              Assistant Secretary

- -----------------------------------
  *11 Greenway Plaza, Suite 100, Houston, Texas 77046-1173

                                      C-9
<PAGE>

     (c)  Provide the information required by the following table for all
          commissions and other compensation received directly or indirectly,
          from the Registrant during the last fiscal year by each principal
          underwriter who is not an affiliated person of the Registrant or any
          affiliated person of an affiliated person.

Item 28.  Location of Accounts and Records

     State the name and address of each person maintaining physical possession
of each account, book, or other document required to be maintained by section
31(a) [15 U.S.C. 80a-30(a)] and the rules under that section.

     A I M Advisors, Inc., 11 Greenway Plaza, Suite 100, Houston, Texas 77046-
     1173, will maintain physical possession of each such account, book or other
     document of the Registrant at its principal executive offices, except for
     those maintained by the Registrant's Custodian, The Bank of New York, 90
     Washington Street, 11th Floor, New York, New York 10286, and Transfer
     Agent, A I M Fund Services, Inc., 11 Greenway Plaza, Suite 100, Houston,
     Texas 77046-1173.

Item 29.  Management Services

     Provide a summary of the substantive provisions of any management-related
service contract not discussed in Part A or B, disclosing the parties to the
contract, the total amount paid and by whom, for the Registrant's last three
fiscal years.

          Not applicable.

Item 30.  Undertakings

          Not applicable.

                                      C-10
<PAGE>

                                  SIGNATURES

     Pursuant to the requirements of the Securities Act of 1933 and the
Investment Company Act of 1940, the Registrant has duly caused this Amendment
to its Registration Statement to be signed on its behalf by the undersigned,
thereto duly authorized, in the city of Houston, Texas on the 8th day of
November , 1999.

                                     Registrant:  SHORT-TERM INVESTMENTS CO.

                                     By:  /s/ ROBERT H. GRAHAM
                                          --------------------
                                       Robert H. Graham, President

     Pursuant to the requirements of the Securities Act of 1933, this Amendment
to the Registration Statement has been signed below by the following persons in
the capacities and on the dates indicated:

             SIGNATURES                   TITLE                     DATE
             ----------                   -----                     ----


       /s/ CHARLES T. BAUER       Chairman & Director        November 8, 1999
       --------------------
        (Charles T. Bauer)

      /s/ ROBERT H. GRAHAM        Director & President       November 8, 1999
      --------------------     (Principal Executive Officer)
       (Robert H. Graham)

     /s/ BRUCE L. CROCKETT              Director             November 8, 1999
     ---------------------
      (Bruce L. Crockett)

       /s/ OWEN DALY II                 Director             November 8, 1999
       ----------------
        (Owen Daly II)

     /s/ EDWARD K. DUNN, JR.            Director             November 8, 1999
     -----------------------
      (Edward K. Dunn, Jr.)

        /s/ JACK FIELDS                 Director             November 8, 1999
        ---------------
         (Jack Fields)

      /s/ CARL FRISCHLING               Director             November 8, 1999
      -------------------
       (Carl Frischling)

    /s/ PREMA MATHAI-DAVIS              Director             November 8, 1999
    ----------------------
     (Prema Mathai-Davis)

     /s/ LEWIS F. PENNOCK               Director             November 8, 1999
     --------------------
      (Lewis F. Pennock)

     /s/ LOUIS S. SKLAR                 Director             November 8, 1999
     ------------------
      (Louis S. Sklar)

     /s/ DANA R. SUTTON            Vice President &          November 8, 1999
     ------------------     Treasurer (Principal Financial
      (Dana R. Sutton)          and Accounting Officer)
<PAGE>

                               INDEX TO EXHIBITS


Exhibit
Number
- ------

a(1)(n)  Articles Supplementary of Registrant, as filed with the State of
         Maryland on June 9, 1999

b(2)(b)  First Amendment, dated June 9, 1999, to By-Laws of Registrant

e(3)(b)  Amendment No. 1 to Master Distribution Agreement between Registrant and
         Fund Management Company dated February 28, 1997

h(3)(b)  Amendment No. 1, dated January 1, 1999, to Transfer Agency and Service
         Agreement between AIM Fund Services, Inc. and Registrant

h(3)(c)  Amendment No. 2, dated July 1, 1999, to Transfer Agency and Service
         Agreement between AIM Fund Services, Inc. and Registrant

h(7)     Form of Memorandum of Agreement between Registrant and Fund Management
         Company

i        Consent of Ballard Spahr Andrews & Ingersoll, LLP

j        Consent of KPMG LLP

m(3)(b)  Amendment No. 1 dated December 18, 1998 to Amended and Restated Master
         Distribution Plan pursuant to Rule 12b-1 for Registrant

n(1)(d)  Third Amended and Restated Multiple Class (Rule 18f-3) Plan

o(1)     The AIM Management Group Code of Ethics adopted May 1, 1981 and as
         amended August 17, 1999 relating to A I M Management Group, Inc. and
         A I M Advisors, Inc.


<PAGE>
                                                                 EXHIBIT a(1)(n)
                          SHORT-TERM INVESTMENTS CO.

                            ARTICLES SUPPLEMENTARY


     SHORT-TERM INVESTMENTS CO., a Maryland corporation (hereinafter called the
"Corporation"), hereby certifies to the State Department of Assessments and
Taxation of Maryland that:

     FIRST: The Board of Directors of the Corporation, by resolutions duly
adopted at a meeting duly called and held on June 8-9, 1999, classified Three
Billion (3,000,000,000) of the authorized but unissued shares as shares of the
Prime Portfolio - Cash Management Class with the preferences, conversion and
other rights, voting powers, restrictions, limitations as to dividends,
qualifications and terms and conditions of redemption of shares of stock as set
forth in ARTICLE FIFTH, paragraph (b) of the charter of the Corporation (the
"Charter") and in any other provisions of the Charter relating to the stock of
the Corporation generally.

     SECOND:  Immediately prior to the filing of these Articles Supplementary,
the Corporation had authority to issue Sixty Billion (60,000,000,000) shares,
$.001 par value per share, having an aggregate par value of $60,000,000, of
which:

     (a)  Three Billion (3,000,000,000) shares have been classified as Liquid
          Assets Portfolio - Cash Management Class, Ten Billion (10,000,000,000)
          shares have been classified as Liquid Assets Portfolio - Institutional
          Class, Three Billion (3,000,000,000) shares have been classified as
          Liquid Asset Portfolio - Personal Investment Class, Three Billion
          (3,000,000,000) shares have been classified as Liquid Assets Portfolio
          - Private Investment Class, Three Billion (3,000,000,000) shares have
          been classified as Liquid Assets Portfolio - Reserve Class, and Three
          Billion (3,000,000,000) shares have been classified as Liquid Assets
          Portfolio - Resource Class;

     (b)  Three Billion (3,000,000,000) shares have been classified as Prime
          Portfolio - Cash Management Class, Fifteen Billion (15,000,000,000)
          shares have been classified as Prime Portfolio - Institutional Class,
          Three Billion (3,000,000,000) shares have been classified as Prime
          Portfolio - Personal Investment Class, Three Billion (3,000,000,000)
          shares have been classified as Prime Portfolio - Private Investment
          Class, Three Billion (3,000,000,000) shares have been classified as
          Prime Portfolio - Reserve Class and Three Billion (3,000,000,000)
          shares have been classified as Prime Portfolio - Resource Class; and

     (c)  Five Billion (5,000,000,000) shares are unclassified.

     THIRD:  As of the filing of these Articles Supplementary, the Corporation
hereby classifies an additional Three Billion (3,000,000,000) shares as Prime
Portfolio - Cash Management Class.  As a result of such classification, of the
Sixty Billion (60,000,000,000) shares authorized by the Charter of the
Corporation:

     (a)  Three Billion (3,000,000,000) shares are classified as Liquid Assets
          Portfolio - Cash Management Class, Ten Billion (10,000,000,000) shares
          are classified as Liquid Assets Portfolio - Institutional Class, Three
          Billion (3,000,000,000) shares are

                                       1
<PAGE>

          classified as Liquid Asset Portfolio - Personal Investment Class,
          Three Billion (3,000,000,000) shares are classified as Liquid Assets
          Portfolio - Private Investment Class; Three Billion (3,000,000,000)
          shares are classified as Liquid Assets Portfolio - Reserve Class, and
          Three Billion (3,000,000,000) shares are classified as Liquid Assets
          Portfolio - Resource Class;

     (b)  Six Billion (6,000,000,000) shares are classified as Prime Portfolio -
          Cash Management Class, Fifteen Billion (15,000,000,000) shares are
          classified as Prime Portfolio - Institutional Class, Three Billion
          (3,000,000,000) shares are classified as Prime Portfolio - Personal
          Investment Class, Three Billion (3,000,000,000) shares are classified
          as Prime Portfolio - Private Investment Class, Three Billion
          (3,000,000,000) shares are classified as Prime Portfolio - Reserve
          Class and Three Billion (3,000,000,000) shares are classified as Prime
          Portfolio - Resource Class; and

     (d)  Two Billion (2,000,000,000) shares are unclassified.

All the shares of common stock of the Corporation, both classified and
unclassified, collectively have an aggregate par value of $60,000,000,000.

     FOURTH: The Corporation is registered as an open-end company under the
Investment Company Act of 1940.

     FIFTH: Unissued shares of common stock (both classified and unclassified)
may be classified by and reclassified by the Board of Directors.

     SIXTH:  The Board of Directors of the Corporation has classified the Prime
Portfolio - Cash Management Class shares under authority contained in the
Charter of the Corporation in accordance with Section 2-105(c) of the Maryland
General Corporation Law.

     SEVENTH:  The Shares were classified by the Board of Directors of the
Corporation under authority granted to it in ARTICLE SEVENTH, paragraph (a) of
the Charter.

     The undersigned President acknowledges these Articles Supplementary to be
the corporate act of the Corporation and states that to the best of his or her
knowledge, information and belief, the matters and facts set forth in these
Articles with respect to authorization and approval are true in all material
respects and that this statement is made under the penalties for perjury.

     IN WITNESS WHEREOF, SHORT-TERM INVESTMENTS CO. has caused these Articles
Supplementary to be executed in its name and on its behalf by its President and
witnessed by its Assistant Secretary on June 9, 1999.

                                       SHORT-TERM INVESTMENTS CO.
Witness:


/s/ LISA A. MOSS                       By:  /s/ ROBERT H. GRAHAM
- ---------------------                       -----------------------
Assistant Secretary                         President

                                       2

<PAGE>

                                                                EXHIBIT b(2)(b)

                    FIRST AMENDMENT TO AMENDED AND RESTATED

                      BYLAWS OF SHORT-TERM INVESTMENTS CO.
                            (A MARYLAND CORPORATION)

                              ADOPTED JUNE 9, 1999



     The Bylaws of Short-Term Investments Co. are hereby amended as follows:

     WHEREAS, the Board of Directors of the Fund desires to modify the manner in
     which a chairman is appointed to preside at each shareholder meeting;

     NOW THEREFORE BE IT RESOLVED, that paragraph (a) of Article I, Section 8 of
     each Funds Bylaws be, and it hereby is, amended by deleting paragraph (a)
     of Article I, Section 8 in its entirety and replacing it with the
     following:

                 Section 8.  Conduct of Stockholders Meetings.

                    (a)  The meetings of the stockholders shall be presided over
          by the Chairman of the Board, or if the Chairman shall not be present
          or if there is no Chairman, by the President, or if the President
          shall not be present, by a Vice President, or if no Vice President is
          present, by a chairman appointed for such purpose by the Board of
          Directors or, if not so appointed, by a chairman appointed for such
          purpose by the officers and Directors present at the meeting.  The
          Secretary of the Corporation, if present, shall act as Secretary of
          such meetings, or if the Secretary is not present, an Assistant
          Secretary of the Corporation shall so act, and if no Assistant
          Secretary is present, then a person designated by the Secretary of the
          Corporation shall so act, and if the Secretary has not designated a
          person, then the meeting shall elect a secretary for the meeting.

<PAGE>

                                                                 EXHIBIT e(3)(b)

                                AMENDMENT NO. 1
                                       TO
                         MASTER DISTRIBUTION AGREEMENT
                                    BETWEEN
                           SHORT-TERM INVESTMENTS CO.
                                      AND
                            FUND MANAGEMENT COMPANY

     The Master Distribution Agreement (the "Agreement"), dated February 28,
1997, by and between SHORT-TERM INVESTMENTS CO., a Maryland corporation and FUND
MANAGEMENT COMPANY, a Texas corporation, is hereby amended as follows:

     Appendix A to the Agreement is hereby deleted in its entirety and replaced
with the following:

                                 APPENDIX A TO
                        MASTER DISTRIBUTION AGREEMENT OF
                           SHORT-TERM INVESTMENTS CO.

Prime Portfolio
- ---------------
 .  Cash Management Class
 .  Institutional Class
 .  Personal Investment Class
 .  Private Investment Class
 .  Reserve Class
 .  Resource Class

Liquid Assets Portfolio
- -----------------------
 .  Cash Management Class
 .  Institutional Class
 .  Personal Investment Class
 .  Private Investment Class
 .  Reserve Class
 .  Resource Class

                                       1
<PAGE>

     All other terms and provisions of the Agreement not amended herein shall
remain in full force and effect.

Dated: December 18, 1998.
       -----------------
                                       SHORT-TERM INVESTMENTS CO.


Attest: /s/ LISA A. MOSS               By: /s/ ROBERT H. GRAHAM
        ----------------                   --------------------
Name:  Lisa A. Moss                    Name:  Robert H. Graham
Title:  Assistant Secretary            Title:  President

(SEAL)



                                       FUND MANAGEMENT COMPANY


Attest: /s/ LISA A. MOSS               By: /s/ J. ABBOTT SPRAGUE
        ----------------                   ---------------------
Name:  Lisa A. Moss                    Name:  J. Abbott Sprague
Title:  Assistant Secretary            Title:  President


(SEAL)

                                       2

<PAGE>

                                                                 EXHIBIT h(3)(b)

                   AMENDMENT NUMBER 1 TO THE TRANSFER AGENCY
                             AND SERVICE AGREEMENT

This Amendment, dated as of January 1, 1999 is made to the Transfer Agency and
Service Agreement dated December 29, 1997 (the "Agreement") between Short-Term
Investments Co. (the "Fund") and A I M Fund Services, Inc. ("AFS") pursuant to
Article 10 of the Agreement.

A fee calculated by multiplying the number of shareholder accounts in the Fund
by $.20 shall be paid by the Fund to AFS concurrently with the fees payable by
the Fund to AFS under Article 2 of the Agreement.

Upon a vote of the Board of Directors of the Fund terminating this Amendment,
this Amendment shall cease to apply, and the Transfer Agency and Service
Agreement shall be complete without reference hereto.

                                       SHORT-TERM INVESTMENTS CO.


                                       By:/s/ ROBERT H. GRAHAM
                                          ------------------------
                                          President
ATTEST:
/s/ Lisa A. Moss
- ---------------------
Assistant Secretary


                                       A I M FUND SERVICES, INC.

                                       By: /s/ JOHN CALDWELL
                                           -----------------------
                                           President
ATTEST:
/s/ Lisa A. Moss
- ---------------------
Assistant Secretary

<PAGE>

                                                                 EXHIBIT h(3)(c)

                   AMENDMENT NUMBER 2 TO THE TRANSFER AGENCY
                             AND SERVICE AGREEMENT

This Amendment, dated as of July 1, 1999, is made to the Transfer Agency and
Service Agreement dated December 29, 1997 (the "Agreement") between Short-Term
Investments Co. (the "Fund") and A I M Fund Services, Inc. ("AFS") pursuant to
Article 10 of the Agreement.

Section 2.01 of the Agreement is hereby deleted in its entirety and replaced
with the following:

     "2.01  For performance by the Transfer Agent pursuant to this Agreement,
the Fund agrees on behalf of each of the Portfolios to pay the Transfer Agent an
annual fee in the amount of .0125% of average daily net assets, payable monthly.
Such fee and out-of-pocket expenses and advances identified under Section 2.03
below may be changed from time to time subject to mutual written agreement
between the Fund and the Transfer Agent."

     All other terms and provisions of the Agreement not amended herein shall
remain in full force and effect.

                                       SHORT-TERM INVESTMENTS CO.


                                       By: /s/ ROBERT H. GRAHAM
                                           --------------------
                                           President
ATTEST:
/s/ LISA A. MOSS
- ---------------------
Assistant Secretary


                                       A I M FUND SERVICES, INC.



                                       By:  /s/ JOHN CALDWELL
                                           --------------------
                                           President
ATTEST:
/s/ LISA A. MOSS
- ---------------------
Assistant Secretary

<PAGE>

                                                                    EXHIBIT h(7)

                            MEMORANDUM OF AGREEMENT

     This Memorandum of Agreement is entered into as of this 17th day of
December, 1999 between Short-Term Investments Co. (the "Company"), on behalf of
the funds listed on Exhibit "A" to this Memorandum of Agreement (the "Funds"),
and Fund Management Company. ("FMC").

     For and in consideration of the mutual terms and agreements set forth
herein and other good and valuable consideration, the receipt and sufficiency of
which is hereby acknowledged, the Company and FMC agree as follows:

     The Company and FMC agree until the date set forth on the attached Exhibit
"A" that FMC will limit Rule 12b-1 distribution plan payments at the rates set
forth on Exhibit "A" of the average daily net assets allocable to such class.
Neither the Company nor FMC may remove or amend the limits to the Company's
detriment prior to the date set forth on Exhibit "A." FMC will not have any
right to reimbursement of any amount so limited.

     The Company and FMC agree to review the then-current limits for each class
of each Fund listed on Exhibit "A" on a date prior to the date listed on that
Exhibit to determine whether such limits should be amended, continued or
terminated.   Unless the Company, by vote of its Board of Directors, or FMC
terminates the limits, or the Company and FMC are unable to reach an agreement
on the amount of the limits to which the Company and FMC desire to be bound, the
limits will continue for additional one-year terms at the rate to which the
Company and FMC mutually agree.  Exhibit "A" will be amended to reflect that
rate and the new date through which the Company and FMC agree to be bound.

     IN WITNESS WHEREOF, the Company and FMC have entered into this Memorandum
of Agreement as of the date first above written.

                                 Short-Term Investments Co.,
                                 on behalf of each Fund listed in Exhibit "A"
                                 to this Memorandum of Agreement

                                 By:________________________________

                                 Title:_______________________________

                                 Fund Management Company

                                 By:  ______________________________

                                 Title:  ______________________________
<PAGE>

                                  EXHIBIT "A"
                                  -----------

                           SHORT-TERM INVESTMENTS CO.

FUND                              LIMITATION                    COMMITTED UNTIL
- ----                              ----------                    ---------------

Liquid Assets Portfolio

     Cash Management Class           0.08%                      June 30, 2000

     Resource Class                  0.20%                      June 30, 2000

     Private Investment Class        0.30%                      June 30, 2000

     Personal Investment Class       0.50%                      June 30, 2000

     Reserve Class                   0.80%                      June 30, 2000

Prime Portfolio

     Cash Management Class           0.08%                      June 30, 2000

     Resource Class                  0.16%                      June 30, 2000

     Private Investment Class        0.30%                      June 30, 2000

     Personal Investment Class       0.50%                      June 30, 2000

     Reserve Class                   0.80%                      June 30, 2000

<PAGE>

                                                                       EXHIBIT i

                               CONSENT OF COUNSEL

                           SHORT-TERM INVESTMENTS CO.
                           --------------------------


          We hereby consent to the use of our name and to the reference to our
firm under the caption "General Information About the Fund - Legal Matters" in
the Statements of Additional Information for the Liquid Assets Portfolio and the
Prime Portfolio, both of which are included in Post-Effective Amendment No. 10
to the Registration Statement under the Securities Act of 1933, as amended (No.
33-66240) and Amendment No. 11 to the Registration Statement under the
Investment Company Act of 1940, as amended (No. 811-7892) on Form N-1A of Short-
Term Investments Co.



                              /s/ BALLARD SPAHR ANDREWS & INGERSOLL, LLP
                              -------------------------------------------------
                              Ballard Spahr Andrews & Ingersoll, LLP


Philadelphia, Pennsylvania
November 8, 1999

<PAGE>

                                                                      EXHIBIT  j
                         INDEPENDENT AUDITORS' CONSENT



The Board of Directors and Shareholders
Short-Term Investments Co.:

We consent to the use of our reports on the Liquid Assets Portfolio and the
Prime Portfolio (series portfolios of Short-Term Investments Co.) dated
October 1, 1999 included herein and the references to our firm under the
headings "Financial Highlights" in the Prospectuses and "Reports" in the
Statements of Additional Information.

/s/ KPMG LLP
KPMG LLP



Houston, Texas
November 8, 1999

<PAGE>

                                                                 EXHIBIT m(3)(b)

                                AMENDMENT NO. 1
                                       TO
                              AMENDED AND RESTATED
                MASTER DISTRIBUTION PLAN PURSUANT TO RULE 12B-1
                                       OF
                           SHORT-TERM INVESTMENTS CO.

     The Amended and Restated Master Distribution Plan Pursuant to Rule 12b-1
(the "Plan"), of Short-Term Investments Co. (the "Company"), a Maryland
corporation, with respect to its Liquid Assets Portfolio and its Prime
Portfolio, is hereby amended as follows:

     Appendix A of the Plan is hereby deleted in its entirety and replaced with
the following:

                                 APPENDIX A TO
                              AMENDED AND RESTATED
                          MASTER DISTRIBUTION PLAN OF
                           SHORT-TERM INVESTMENTS CO.

                               (DISTRIBUTION FEE)

     The Company shall pay the Distributor as full compensation for all services
rendered and all facilities furnished under the Distribution Plan for each class
as designated below, a Distribution Fee* determined by applying the annual rate
set forth below as to each class to the average daily nets assets of the class
for the plan year, computed in a manner used for the determination of the
offering price of shares of the class.

     Liquid Assets Portfolio          ANNUAL RATE
     -----------------------          -----------
     Cash Management Class                0.10%
     Resource Class                       0.20%
     Private Investment Class             0.50%
     Personal Investment Class            0.75%
     Reserve Class                        1.00%

     PRIME PORTFOLIO                  ANNUAL RATE
     ---------------                  -----------
     Cash Management Class                0.10%
     Resource Class                       0.20%
     Private Investment Class             0.50%
     Personal Investment Class            0.75%
     Reserve Class                        1.00%

_____________________

*    The Distribution Fee is payable apart from the sales charge, if any, as
     stated in the current prospectus for the applicable class.  The amount of
     the Distribution Fee is subject to any applicable limitations imposed from
     time to time by applicable rules of the National Association of Securities
     Dealers, Inc.

                                       1
<PAGE>

     All other terms and provisions of the Plan not amended herein shall remain
in full force and effect.

Dated:  December 18, 1998
        -----------------
                                       SHORT-TERM INVESTMENTS CO.

Attest: /s/LISA A. MOSS               By: /s/ ROBERT H. GRAHAM
       ---------------                    --------------------
Name:  Lisa A. Moss                   Name:  Robert H. Graham
Title:  Assistant Secretary           Title: President


(SEAL)

                                       2

<PAGE>

                                                                 EXHIBIT n(1)(d)


                THIRD AMENDED AND RESTATED MULTIPLE CLASS PLAN
                                       OF
                           THE AIM FAMILY OF FUNDS--Registered Trademark--


1.   This Third Amended and Restated Multiple Class Plan (the "Plan") adopted in
     accordance with Rule 18f-3 under the Act shall govern the terms and
     conditions under which the Funds may issue separate Classes of Shares
     representing interests in one or more Portfolios of each Fund.

2.   Definitions.  As used herein, the terms set forth below shall have the
     meanings ascribed to them below.

     (a)  Act - Investment Company Act of 1940, as amended.

     (b)  AIM Cash Reserve Shares - shall mean the AIM Cash Reserve Shares Class
          of AIM Money Market Fund, a Portfolio of AIM Funds Group.

     (c)  CDSC - contingent deferred sales charge.

     (d)  CDSC Period - the period of years following acquisition of Shares
          during which such Shares may be assessed a CDSC upon redemption.

     (e)  Class - a class of Shares of a Fund representing an interest in a
          Portfolio.

     (f)  Class A Shares - shall mean those Shares designated as Class A Shares
          in the Fund's organizing documents.

     (g)  Class B Shares - shall mean those Shares designated as Class B Shares
          in the Fund's organizing documents.

     (h)  Class C Shares - shall mean those Shares designated as Class C Shares
          in the Fund's organizing documents.

     (i)  Directors - the directors or trustees of a Fund.

     (j)  Distribution Expenses - expenses incurred in activities which are
          primarily intended to result in the distribution and sale of Shares as
          defined in a Plan of Distribution and/or agreements relating thereto.

     (k)  Distribution Fee - a fee paid by a Fund to the Distributor to
          compensate the Distributor for Distribution Expenses.

     (l)  Distributor - A I M Distributors, Inc. or Fund Management Company, as
          applicable.

     (m)  Fund - those investment companies advised by A I M Advisors, Inc.
          which have adopted this Plan.

                                       1
<PAGE>

     (n)  Institutional Shares - shall mean Shares of a Fund representing an
          interest in a Portfolio offered for sale to institutional customers as
          may be approved by the Directors from time to time and as set forth in
          the Fund's prospectus.

     (o)  Plan of Distribution - Any plan adopted under Rule 12b-1 under the Act
          with respect to payment of a Distribution Fee and/or Service Fee.

     (p)  Portfolio - a series of the Shares of a Fund constituting a separate
          investment portfolio of the Fund.

     (q)  Service Fee - a fee paid to financial intermediaries for the ongoing
          provision of personal services to Fund shareholders and/or the
          maintenance of shareholder accounts.

     (r)  Share - a share of common stock of or beneficial interest in a Fund,
          as applicable.

3.   Allocation of Income and Expenses.

     (a)  Distribution Fees and Service Fees - Each Class shall bear directly
          any and all Distribution Fees and/or Service Fees payable by such
          Class pursuant to a Plan of Distribution adopted by the Fund with
          respect to such Class.

     (b)  Transfer Agency and Shareholder Recordkeeping Fees - Each Class shall
          bear directly the transfer agency fees and expenses and other
          shareholder recordkeeping fees and expenses specifically attributable
          to that Class; provided, however, that where two or more Classes of a
          Portfolio pay such fees and/or expenses at the same rate or in the
          same amount, those Classes shall bear proportionately such fees and
          expenses based on the relative net assets attributable to each such
          Class.

     (c)  Allocation of Other Expenses - Each Class shall bear proportionately
          all other expenses incurred by a Fund based on the relative net assets
          attributable to each such Class.

     (d)  Allocation of Income, Gains and Losses - Except to the extent provided
          in the following sentence, each Portfolio will allocate income and
          realized and unrealized capital gains and losses to a Class based on
          the relative net assets of each Class.  Notwithstanding the foregoing,
          each Portfolio that declares dividends on a daily basis will allocate
          income on the basis of settled shares.

     (e)  Waiver and Reimbursement of Expenses - A Portfolio's adviser,
          underwriter or any other provider of services to the Portfolio may
          waive or reimburse the expenses of a particular Class or Classes.

4.   Distribution and Servicing Arrangements.  The distribution and servicing
     arrangements identified below will apply for the following Classes offered
     by a Fund with respect to a Portfolio.  The provisions of the Fund's
     prospectus describing the distribution and servicing arrangements in detail
     are incorporated herein by this reference.

                                       2
<PAGE>

     (a)  Class A Shares.  Class A Shares shall be offered at net asset value
          plus a front-end sales charge as approved from time to time by the
          Directors and set forth in the Fund's prospectus, which sales charge
          may be reduced or eliminated for certain money market fund shares, for
          larger purchases, under a combined purchase privilege, under a right
          of accumulation, under a letter of intent or for certain categories of
          purchasers as permitted by Section 22(d) of the Act and as set forth
          in the Fund's prospectus.  Class A Shares that are not subject to a
          front-end sales charge as a result of the foregoing shall be subject
          to a CDSC for the CDSC Period set forth in Section 5(a) of this Plan
          if so provided in the Fund's prospectus.  The offering price of Shares
          subject to a front-end sales charge shall be computed in accordance
          with Rule 22c-1 and Section 22(d) of the Act and the rules and
          regulations thereunder.  Class A Shares shall be subject to ongoing
          Service Fees and/or Distribution Fees approved from time to time by
          the Directors and set forth in the Fund's prospectus.

     (b)  Class B Shares.  Class B Shares shall be (i) offered at net asset
          value, (ii) subject to a CDSC for the CDSC Period set forth in Section
          5(b), (iii) subject to ongoing Service Fees and Distribution Fees
          approved from time to time by the Directors and set forth in the
          Fund's prospectus, and (iv) converted to Class A Shares eight years
          from the end of the calendar month in which the shareholder's order to
          purchase was accepted, as set forth in the Fund's prospectus.

     (c)  Class C Shares.  Class C Shares shall be (i) offered at net asset
          value, (ii) subject to a CDSC for the CDSC Period set forth in Section
          5(c),  and (iii) subject to ongoing Service Fees and Distribution Fees
          approved from time to time by the Directors and set forth in the
          Fund's prospectus.

     (d)  Institutional Shares.  Institutional Shares shall be (i) offered at
          net asset value, (ii) offered only to certain categories of
          institutional customers as approved from time to time by the Directors
          and as set forth in the Fund's prospectus and (iii) may be subject to
          ongoing Service Fees and/or Distribution Fees as approved from time to
          time by the Directors and set forth in the Fund's prospectus.

     (e)  AIM Cash Reserve Shares.  AIM Cash Reserve Shares shall be (i) offered
          at net asset value and (ii) subject to ongoing Service Fees and/or
          Distribution Fees approved from time to time by the Directors and set
          forth in the Fund's prospectus.  AIM Cash Reserve Shares acquired
          through exchange of Class A Shares of another Portfolio may be subject
          to a CDSC for the CDSC Period set forth in Section 5(a) of this Plan
          if so provided in the Fund's prospectus.

5.   CDSC.  A CDSC shall be imposed upon redemptions of Class A Shares that do
     not incur a front-end sales charge and of Class B Shares and Class C Shares
     as follows:

     (a)  Class A Shares.  The CDSC Period for Class A Shares shall be 18
          months.  The CDSC Rate shall be as set forth in the Fund's prospectus,
          the relevant portions of which are incorporated herein by this
          reference.  No CDSC shall be imposed on Class A Shares unless so
          provided in a Fund's prospectus.

                                       3
<PAGE>

     (b)  Class B Shares.  The CDSC Period for the Class B Shares shall be six
          years.  The CDSC Rate for the Class B Shares shall be as set forth in
          the Fund's prospectus, the relevant portions of which are incorporated
          herein by this reference.

     (c)  Class C Shares.  The CDSC Period for the Class C Shares shall be one
          year.  The CDSC Rate for the Class C Shares shall be as set forth in
          the Fund's prospectus, the relevant portions of which are incorporated
          herein by reference.

     (d)  Method of Calculation.  The CDSC shall be assessed on an amount equal
          to the lesser of the then current market value or the cost of the
          Shares being redeemed.  No sales charge shall be imposed on increases
          in the net asset value of the Shares being redeemed above the initial
          purchase price.  No CDSC shall be assessed on Shares derived from
          reinvestment of dividends or capital gains distributions.  The order
          in which Shares are to be redeemed when not all of such Shares would
          be subject to a CDSC shall be determined by the Distributor in
          accordance with the provisions of Rule 6c-10 under the Act.

     (e)  Waiver.  The Distributor may in its discretion waive a CDSC otherwise
          due upon the redemption of Shares on terms disclosed in the Fund's
          prospectus or statement of additional information and, for the Class A
          Shares and AIM Cash Reserve Shares, as allowed under Rule 6c-10 under
          the Act.

6.   Exchange Privileges.  Exchanges of Shares shall be permitted between Funds
     as follows:

     (a)  Class A Shares may be exchanged for Class A Shares of another
          Portfolio or AIM Cash Reserve Shares, subject to certain limitations
          set forth in the Fund's prospectus as it may be amended from time to
          time, relevant portions of which are incorporated herein by this
          reference.

     (b)  Class B Shares may be exchanged for Class B Shares of another
          Portfolio at their relative net asset value.

     (c)  Class C Shares may be exchanged for Class C Shares of any other
          Portfolio at their relative net asset value.

     (d)  AIM Cash Reserve Shares may be exchanged for Class A Shares, Class B
          Shares or Class C Shares of another Portfolio, subject to certain
          limitations set forth in the Fund's prospectus as it may be amended
          from time to time, relevant portions of which are incorporated herein
          by this reference.

     (e)  Depending upon the Portfolio from which and into which an exchange is
          being made and when the shares were purchased, shares being acquired
          in an exchange may be acquired at their offering price, at their net
          asset value or by paying the difference in sales charges, as disclosed
          in the Fund's prospectus and statement of additional information.

                                       4
<PAGE>

     (f)  CDSC Computation.   The CDSC payable upon redemption of Class A
          Shares, Class B Shares, Class C Shares and AIM Cash Reserve Shares
          subject to a CDSC shall be computed in the manner described in the
          Fund's prospectus.

7.   Service and Distribution Fees.  The Service Fee and Distribution Fee
     applicable to any Class shall be those set forth in the Fund's prospectus,
     relevant portions of which are incorporated herein by this reference.  All
     other terms and conditions with respect to Service Fees and Distribution
     Fees shall be governed by the Plan of Distribution adopted by the Fund with
     respect to such fees and Rule 12b-1 of the Act.

8.   Conversion of Class B Shares.

     (a)  Shares Received upon Reinvestment of Dividends and Distributions -
          Shares purchased through the reinvestment of dividends and
          distributions paid on Shares subject to conversion shall be treated as
          if held in a separate sub-account.  Each time any Shares in a
          Shareholder's account (other than Shares held in the sub-account)
          convert to Class A Shares, a proportionate number of Shares held in
          the sub-account shall also convert to Class A Shares.

     (b)  Conversions on Basis of Relative Net Asset Value - All conversions
          shall be effected on the basis of the relative net asset values of the
          two Classes without the imposition of any sales load or other charge.

     (c)  Amendments to Plan of Distribution for Class A Shares - If any
          amendment is proposed to the Plan of Distribution under which Service
          Fees and Distribution Fees are paid with respect to Class A Shares of
          a Fund that would increase materially the amount to be borne by those
          Class A Shares, then no Class B Shares shall convert into Class A
          Shares of that Fund until the holders of Class B Shares of that Fund
          have also approved the proposed amendment.  If the holders of such
          Class B Shares do not approve the proposed amendment, the Directors of
          the Fund and the Distributor shall take such action as is necessary to
          ensure that the Class voting against the amendment shall convert into
          another Class identical in all material respects to Class A Shares of
          the Fund as constituted prior to the amendment.

9.   Effective Date.  This Plan shall not take effect until a majority of the
     Directors of a Fund, including a majority of the Directors who are not
     interested persons of the Fund, shall find that the Plan, as proposed and
     including the expense allocations, is in the best interests of each Class
     individually and the Fund as a whole.

10.  Amendments.    This Plan may not be amended to materially change the
     provisions of this Plan unless such amendment is approved in the manner
     specified in Section 9 above.

                                       5

<PAGE>

                                                                   EXHIBIT o(1)
                           THE AIM MANAGEMENT GROUP
                                 CODE OF ETHICS

                             (Adopted May 1, 1981)
                       (As Last Amended August 17, 1999)


   WHEREAS, the members of the AIM Management Group are A I M Management Group
Inc. ("AIM Management") and A I M Advisors, Inc. ("AIM Advisors") and its wholly
owned and indirect subsidiaries (individually and collectively referred to as
"AIM"); and

   WHEREAS, certain members of AIM provide investment advisory services to AIM's
investment companies and other clients; and

   WHEREAS, certain members of AIM provide distribution services as principal
underwriters for AIM's investment company clients; and

   WHEREAS, certain members of AIM provide shareholder services as the transfer
agent, dividend disbursing agent and shareholder processing agent for AIM's
investment company clients; and

   WHEREAS, the investment advisory business involves decisions and information
which may have at least a temporary impact on the market price of securities,
thus creating a potential for conflicts of interest between the persons engaged
in such business and their clients; and

   WHEREAS, the members of AIM have a fiduciary relationship with respect to
each portfolio under management and the interests of the client accounts and of
the shareholders of AIM's investment company clients must take precedence over
the personal interests of the employees of AIM, thus requiring a rigid adherence
to the highest standards of conduct by such employees; and

   WHEREAS, every practical step must be taken to ensure that no intentional or
inadvertent action is taken by an employee of AIM which is, or appears to be,
adverse to the interests of AIM or any of its client accounts, including the
defining of standards of behavior for such employees, while at the same time
avoiding unnecessary interference with the privacy or personal freedom of such
employees; and

   WHEREAS, the members of AIM originally adopted a Code of Ethics ("the Code")
on May 1, 1981, and adopted amendments thereto in January 1989, October 1989,
April 1991, December 6, 1994 and December 5, 1995, December 10, 1996, and now
deem it advisable to update and revise said Code in light of new investment
company products developed by AIM and changing circumstances in the securities
markets in which AIM conducts business; and

   NOW, THEREFORE, the Boards of Directors of AIM Management and AIM Advisors
hereby adopt the following revised Code pursuant to the provisions of Rule 17j-1
under the Investment Company Act of 1940 ("1940 Act"), with the intention that
certain provisions of the Code shall become applicable to the officers,
directors and employees of AIM.

I. Applicability
   A. The provisions of AIM's Code shall apply to certain officers, directors
      and employees (as hereinafter designated) of AIM.  Unless otherwise
      indicated, the term "employee" as used herein means: (i) all officers,
      directors and employees of AIM Advisors and its wholly owned and indirect
      subsidiaries and (ii) officers, directors and employees of AIM Management
      who

                                       1
<PAGE>

      have an active part in the management, portfolio selection, underwriting
      or shareholder functions with respect to AIM's investment company clients
      or provide one or more similar services for AIM's non-investment company
      clients. The term "employee" does not include directors of AIM Management
      who do not maintain an office at the home office of AIM Management and who
      do not regularly obtain information concerning the investment
      recommendations or decisions made by AIM on behalf of client accounts
      ("independent directors").

   B. The Code shall also apply to any person or entity appointed as a sub-
      advisor for an AIM investment company client account unless such person or
      entity has adopted a code of ethics in compliance with Section 17(j) of
      the 1940 Act; or, in the event that such person or entity is domiciled
      outside of the United States, has adopted employee standards of conduct
      that provide equivalent protections to AIM's client accounts.  In
      performing sub-advisory services, such person or entity will be subject to
      the direction and supervision of AIM, and subject to the policies and
      control of the Boards of Directors/Trustees of the respective AIM
      investment company client(s).

II.  Interpretation and Enforcement
   A. The Chief Executive Officer of AIM Management shall appoint a Code of
      Ethics Committee ("Committee").  The Committee shall have the
      responsibility for interpreting the provisions of the Code, for adopting
      and implementing Procedures for the enforcement of the provisions of the
      Code, and for determining whether a violation of the provisions of the
      Code, or of any such related Procedures has occurred.  The Committee will
      appoint an officer to monitor personal investment activity by "Covered
      Persons" (as defined in the Procedures adopted hereunder), both before and
      after any trade occurs and to prepare periodic and annual reports, conduct
      education seminars and obtain employee certifications as deemed
      appropriate.  In the event of a finding that a violation has occurred
      requiring significant remedial action, the Committee shall take such
      action as it deems appropriate on the imposition of sanctions or
      initiation of disgorgement proceedings.  The Committee shall also make
      recommendations and submit reports to the Boards of Directors/Trustees of
      AIM's investment company clients.

   B. If a sub-advisor has adopted a code of ethics in accordance with Section
      17(j) of the 1940 Act, then pursuant to a sub-advisory agreement with AIM,
      it shall be the duty of such sub-advisor to furnish AIM with a copy of the
      following:

      .  code of ethics and related procedures of the sub-advisor, and a
         statement as to its employees' compliance therewith;

      .  any statement or policy on insider trading adopted pursuant to Section
         204A under the 1940 Act; and the procedures designed to prevent the
         misuse of material non-public information by any person associated with
         such sub-advisor; and

      .  such other information as may reasonably be necessary for AIM to report
         to the Boards of Directors/Trustees of its investment company client
         account(s) as to such sub-advisor's adherence to the Boards' policies
         and controls referenced in Section I.B. above.

III.  Procedures Adopted Under the Code

   From time to time, AIM's Committee shall adopt Procedures to carry out the
   intent of the Code.  Among other things, the Procedures require certain new
   employees to complete an Asset Disclosure Form, a Brokerage Accounts Listing
   Form and such other forms as deemed appropriate by the Committee.  Such
   Procedures are hereby incorporated into the Code and are made a part of the
   Code.  Therefore, a violation of the Procedures shall be deemed a violation
   of the Code itself.

                                       2
<PAGE>

IV.  Compliance with Governing Laws, Regulations and Procedures
   A. Each employee shall have and maintain knowledge of and shall comply
      strictly with all applicable federal and state laws and all rules and
      regulations of any governmental agency or self-regulatory organization
      governing his/her actions as an employee.

   B. Each employee shall comply with all laws and regulations, and AIM's
      prohibition against insider trading.  Trading on or communicating material
      non-public information, or "inside information", of any sort, whether
      obtained in the course of research activities, through a client
      relationship or otherwise, is strictly prohibited.

   C. Each employee shall comply with the procedures and guidelines established
      by AIM to ensure compliance with applicable federal and state laws and
      regulations of governmental agencies and self-regulatory organizations.
      No employee shall knowingly participate in, assist, or condone any act in
      violation of any statute or regulation governing AIM or any act that would
      violate any provision of this Code, or of the Procedures adopted
      hereunder.

   D. Each employee shall have and maintain knowledge of and shall comply with
      the provisions of this Code and any Procedures adopted hereunder.

   E. Each employee having supervisory responsibility shall exercise reasonable
      supervision over employees subject to his/her control, with a view to
      preventing any violation by such persons of applicable statutes or
      regulations, AIM's corporate procedures, or the provisions of the Code, or
      the Procedures adopted hereunder.

   F. Any employee obtaining evidence that an act in violation of applicable
      statutes, regulations or provisions of the Code or of any Procedures
      adopted hereunder has occurred shall immediately report such evidence to
      the Chief Compliance Officer of AIM.  Such action by the employee will
      remain confidential, unless the employee waives confidentiality or federal
      or state authorities compel disclosure.  Failure to report such evidence
      may result in disciplinary proceedings and may include sanctions as set
      forth in Section VI hereof.

V. Ethical Standards
   A. Employees shall conduct themselves in a manner consistent with the highest
      ethical and fiduciary standards.  They shall avoid any action, whether for
      personal profit or otherwise, that results in an actual or potential
      conflict of interest with AIM or its client accounts, or which may be
      otherwise detrimental to the interests of the members of AIM or its client
      accounts./1/


   B. Employees shall act in a manner consistent with their fiduciary obligation
      to clients of AIM, and shall not deprive any client account of an
      investment opportunity in order to personally benefit from that
      opportunity.

- -----------------------------------
      /1/Conflicts of interest generally result from a situation in which an
individual has a personal interest in a matter that is or may be competitive
with his or her responsibilities to other persons or entities (such as AIM or
its client accounts) or where an individual has or may have competing
obligations or responsibilities to two or more persons or entities. In the case
of the relationship between a client account on the one hand, and AIM, its
officers, directors and employees, on the other hand, such conflict may result
from the purchase or sale of securities for a client account and for the
personal account of the individual involved or the account of any "affiliate" of
such individual, as such term is defined in the 1940 Act. Such conflict may also
arise from the purchase or sale for a client account of securities in which an
officer, director or employee of AIM has an economic interest. Moreover, such
conflict may arise in connection with vendor relationships in which such
employee has any direct or indirect financial interest, family interests or
other personal interest. To the extent of conflicts of interest between AIM and
a vendor, such conflicts must be resolved in a manner that is not
disadvantageous to AIM. In any such case, potential or actual conflicts must be
disclosed to AIM and the first preference and priority must be to avoid such
conflicts of interest wherever possible and, where they unavoidably occur, to
resolve them in a manner that is not disadvantageous to a client.

                                       3
<PAGE>

   C. Without the knowledge and approval of the Chief Executive Officer of AIM
      Management, employees shall not engage in a business activity or practice
      for compensation in competition with the members of AIM.  Each employee,
      who is deemed to be a "Covered Person" as defined in the Procedures
      adopted hereunder, shall obtain the written approval of AIM Management's
      Chief Executive Officer to participate on a board of directors/trustees of
      any of the following organizations:

      .  publicly traded company, partnership or trust;
      .  hospital or philanthropic institution;*
      .  local or state municipal authority;* and/or
      .  charitable organization.*
      * These restrictions relate to organizations that have or intend to raise
      proceeds in a public securities offering.

      In the relatively small number of instances in which board approval is
      authorized, investment personnel serving as directors shall be isolated
      from those making investment decisions through AIM's "Chinese Wall"
      Procedures.

   D. Each employee, in making an investment recommendation or taking any
      investment action, shall exercise diligence and thoroughness, and shall
      have a reasonable and adequate basis for any such recommendation or
      action.

   E. Each employee shall not attempt to improperly influence for such person's
      personal benefit any investment strategy to be followed or investment
      action to be taken by the members of AIM for its client accounts.

   F. Each employee shall not improperly use for such person's personal benefit
      any knowledge, whether obtained through such person's relationship with
      AIM or otherwise, of any investment recommendation made or to be made, or
      of any investment action taken or to be taken by AIM for its client
      accounts.

   G. Employees shall not disclose any non-public information relating to a
      client account's portfolio or transactions or to the investment
      recommendations of AIM, nor shall any employee disclose any non-public
      information relating to the business or operations of the members of AIM,
      unless properly authorized to do so.

   H. Employees shall not accept, directly or indirectly, from a broker/dealer
      or other vendor who transacts business with AIM or its client accounts,
      any gifts, gratuities or other things of more than de minimis value or
      significance that their acceptance might reasonably be expected to
      interfere with or influence the exercise of independent and objective
      judgment in carrying out such person's duties or otherwise gives the
      appearance of a possible impropriety.  For this purpose, gifts, gratuities
      and other things of value shall not include unsolicited entertainment so
      long as such unsolicited entertainment is not so frequent or extensive as
      to raise any question of impropriety.

   I. Employees who are registered representatives and/or principals of AIM
      shall not acquire securities for an account for which he/she has a direct
      or indirect beneficial interest in an initial public offering ("IPO") or
      on behalf of any person, entity or organization that is not an AIM client.
      All other employees shall not acquire securities for an account for which
      he/she has a direct or indirect beneficial interest offered in an IPO or
      on behalf of any person, entity or organization that is not an AIM client
      account except in those circumstances where different amounts of such
      offerings are specified for different investor types (e.g., private
      investors and institutional investors) and such transaction has been pre-
      cleared by the Compliance Office.

                                       4
<PAGE>

   J. All personal securities transactions by employees must be conducted
      consistent with this Code and the Procedures adopted hereunder, and in
      such a manner as to avoid any actual or potential conflicts of interest or
      any abuse of such employee's position of trust and responsibility.  Unless
      an exemption is available, employees who are deemed to be "Covered
      Persons" as defined in the Procedures adopted hereunder, shall pre-clear
      all personal securities transactions in securities in accordance with the
      Procedures adopted hereunder.

   K. Each employee, who is deemed to be a "Covered Person" as defined in the
      Procedures adopted hereunder, (or registered representative and/or
      principal of AIM), shall refrain from engaging in personal securities
      transactions in connection with a security that is not registered under
      Section 12 of the Securities Act of 1933 (i.e., a private placement
      security) unless such transaction has been pre-approved by the Chief
      Compliance Officer or the Director of Investments (or their designees).

   L. Employees, who are deemed to be "Covered Persons" as defined in the
      Procedures adopted hereunder, may not engage in a transaction in
      connection with the purchase or sale of a security within seven calendar
      days before and after an AIM investment company client trades in that same
      (or equivalent) security unless the de minimis exemption is available.

   M. Each employee, who is deemed to be a "Covered Person" as defined in the
      Procedures adopted hereunder, may not purchase and voluntarily sell, or
      sell and voluntarily purchase the same (or equivalent) securities of the
      same issuer within 60 calendar days unless such employee complies with the
      disgorgement procedures adopted by the Code of Ethics Committee.  Subject
      to certain limited exceptions set forth in the related Procedures, any
      transaction under this provision may result in disgorgement proceedings
      for any profits received in connection with such transaction by such
      employee.

VI.  Sanctions

   Employees violating the provisions of AIM's Code or any Procedures adopted
   hereunder may be subject to sanctions, which may include, among other things,
   restrictions on such person's personal securities transactions; a letter of
   admonition, education or formal censure; fines, suspension, re-assignment,
   demotion or termination of employment; or other significant remedial action.
   Employees may also be subject to disgorgement proceedings for transactions in
   securities that are inconsistent with Sections V.L. and V.M. above.

VII.  Additional Disclosure

   This Code and the related Procedures cannot, and do not, cover every
   situation in which choices and decisions must be made, because other company
   policies, practices and procedures (as well as good common sense) and good
   business judgment also apply.  Every person subject to this Code should read
   and understand these documents thoroughly.  They present important rules of
   conduct and operating controls for all employees.  Employees are also
   expected to present questions to the attention of their supervisors and to
   the Chief Compliance Officer (or designee) and to report suspected violations
   as specified in these documents.

                                           For the Boards of Directors:
                                             The AIM Management Group

                                       by:  /s/ CHARLES T. BAUER
                                            -----------------------
                                            Charles T. Bauer

                                               August 17, 1999
                                          --------------------------
                                                    Date




                                       5


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