ABN AMRO FUNDS
497, 2000-06-30
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[Logo] ABN-AMRO Funds

Prospectus - Institutional Service Shares

May 1, 2000
As Amended June 30, 2000




Institutional Money Market Funds

o  Institutional Prime Money Market Fund(US)

o  Institutional Government Money Market Fund(US)

o  Institutional Treasury Money Market Fund(US)



The Securities and Exchange  Commission (SEC) has not approved or disapproved of
these  securities  or  passed  upon  the  adequacy  of  this   Prospectus.   Any
representation to the contrary is a criminal offense.

All Funds may not be available in all states.
















   For more information, please call the ABN AMRO Funds or visit the website:

                                 1-888-838-5132
                            www.abnamrofunds-usa.com


<PAGE>




Contents

This Prospectus  gives you important  information that you should know about the
Funds before  investing.  We arranged the Prospectus into different  sections so
that you can easily  review this  important  information.  On the next page,  we
discuss general information you should know about investing in the Funds.



The Funds                                                                   Page

Introduction                                                                   2

Institutional Prime Money Market Fund(US)                                      3

Institutional Government Money Market Fund(US)                                 5

Institutional Treasury Money Market Fund(US)                                   7

Investment Advisor                                                            12

Account Information

Transaction Policies                                                          13

Distributions and Taxes                                                       14

Investor Services                                                             14

Instructions for Account Transactions                                         15

For More Information                                                          16

More information on each Fund can be                                    See Back
found in the Fund's current Statement of                                   Cover
Additional Information.


ABN AMRO is a service mark of ABN AMRO Holding,  N.V., an indirect parent of ABN
AMRO Asset Management (USA) Inc., the investment  advisor to the ABN AMRO Funds.
ABN AMRO Funds are distributed by Provident  Distributors,  Inc., which is not a
bank affiliate.



<PAGE>




The Funds

This Prospectus  describes three separate money market mutual funds designed for
institutional   investors:    Institutional   Prime   Money   Market   Fund(US),
Institutional  Government Money Market Fund(US) and Institutional Treasury Money
Market Fund(US). As mutual funds, the Funds are professionally  managed,  pooled
investments  that give  investors the  opportunity  to  participate in financial
markets.  The portfolio,  management,  operations and performance results of the
funds are unrelated to each other.

Your investment in a Fund is not a bank deposit. It is not insured or guaranteed
by the Federal Deposit Insurance  Corporation  (FDIC) or any government  agency.
Although  each Fund seeks to preserve the value of your  investment at $1.00 per
share, there is no guarantee that it will do so and it is possible to lose money
by investing in a Fund.

Money market funds invest in high quality, short-term debt securities,  commonly
known as  money  market  instruments.  These  generally  include  CDs,  bankers'
acceptances,  U.S. Treasury securities,  some municipal  securities,  commercial
paper, and repurchase agreements involving these instruments. Money market funds
follow  strict rules about credit risk,  maturity and  diversification  of their
investments.

The  Money  Market  Funds  are  subject  to  specific   maturity,   quality  and
diversification  requirements  that are  designed  to help the Funds  maintain a
stable net asset value. The Money Market Funds invest substantially all of their
assets  in  securities  rated  in one  of  the  two  highest  short-term  rating
categories  by a  nationally  recognized  statistical  rating  organization.  In
addition, the Money Market Funds may not:

o   have a dollar-weighted average portfolio maturity over 90 days;

o buy securities with remaining  maturities of over 397 days (except for certain
variable and floating rate instruments and securities collateralizing repurchase
agreements); and

o   invest in non-U.S. dollar denominated securities.



<PAGE>




INSTITUTIONAL PRIME MONEY MARKET FUND(US)


[Logo]

Investment  Goal To provide as high a level of current  income as is  consistent
with the preservation of capital and liquidity.

[Logo]

Principal Investment Strategies
The Fund invests  substantially  all of its assets in high quality  money market
instruments  issued  by  corporations,  banks  and the  U.S.  government  or its
agencies or instrumentalities,  as well as repurchase agreements involving these
instruments. he Fund may also invest in dollar-denominated securities of foreign
issuers.

ABN AMRO  Asset  Management  (USA)  Inc.,  the  Advisor,  structures  the Fund's
portfolio  based on its  outlook  on  interest  rates,  market  conditions,  and
liquidity needs. The Advisor monitors the Fund's  investments for credit quality
changes  and may adjust the  average  maturity  of the Fund in  anticipation  of
changes in short-term interest rates. Important factors include an assessment of
Federal Reserve policy and an analysis of the yield curve. [Logo]

Principal Risks of Investing in this Fund

o  The Fund may not be able to maintain a net asset value of $1.00 at all times.

o As  market  and  interest  rates  change  and as the  proceeds  of short  term
securities  in the Fund's  portfolio  become  available  and are  reinvested  in
securities  with different  interest rates,  the Fund's yield will fluctuate.  A
sharp rise in interest rates could cause the Fund's share price to drop.

o An issuer may become unable to make timely payments of  principal or interest.

o  The credit ratings of issuers could change and affect the Fund's share price.

o The  Fund  may be  unable  to sell  the  securities  underlying  a  repurchase
agreement on a timely  basis if the other party  entering  into the  repurchase
agreement with the Fund defaults or becomes insolvent.

o Certain  U.S.  government  agency  securities  are  backed by the right of the
issuer to borrow from the U.S. Treasury,  or are supported only by the credit of
the issuer or  instrumentality.  While the U.S.  government  provides  financial
support to U.S. government-sponsored agencies or instrumentalities, no assurance
can be given that it will always do so.

o The Fund may invest in dollar  denominated  securities of foreign issuers that
will subject it to the market and economic risks of foreign markets. Investments
in foreign securities can be more volatile than investments in U.S.  securities.
Diplomatic,  political,  or economic developments unique to a country or region,
including nationalization or appropriation, could affect foreign investments.


<PAGE>



[Logo]

Fees and Expenses

ANNUAL FUND OPERATING EXPENSES (deducted from Fund assets)
This table describes the Fund's expenses that you may pay indirectly if you hold
Fund Shares.

Investment Advisory Fees                             .10%
Service Fee                                          .25%
Other Expenses1                                      .13%
Total Annual Fund Operating Expenses                 .48%

1 Since the Fund has not commenced  operations as of May 1, 2000, Other Expenses
are based on estimated amounts for the current fiscal year.

EXAMPLE

This  example is intended to help you compare the cost of  investing in 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 that you sell your
shares at the end of each  period.  The example also assumes that each year your
investment  has a 5% return and Fund  expenses  remain the same.  Although  your
actual costs and returns might be different, your approximate costs of investing
$10,000 in the Fund would be:

                                 1 Year      3 Years
                                    $49      $154




<PAGE>



INSTITUTIONAL GOVERNMENT MONEY MARKET FUND(US)


[Logo]

Investment  Goal To provide as high a level of current  income as is  consistent
with the preservation of capital and liquidity.

[Logo]

Principal  Investment  Strategies  The Fund  invests  100% of its assets in U.S.
government money market instruments,  such as U.S. Treasury obligations and U.S.
government  agency  securities,  and  repurchase  agreements in respect of these
securities.

The Advisor  structures  the Fund's  portfolio  based on its outlook on interest
rates,  market conditions,  and liquidity needs. The Advisor monitors the Fund's
investments  and  adjusts the average  maturity of the Fund in  anticipation  of
changes in short-term interest rates. Important factors include an assessment of
Federal Reserve policy and an analysis of the yield curve.

[Logo]

Principal Risks of Investing in this Fund

o  The Fund may not be able to maintain a net asset value of $1.00 at all times.

o As  market  and  interest  rates  change  and as the  proceeds  of  short-term
securities  in the Fund's  portfolio  become  available  and are  reinvested  in
securities  with different  interest rates,  the Fund's yield will fluctuate.  A
sharp rise in interest rates could cause the Fund's share price to drop.

o A security  backed by the full  faith and  credit of the United  States or the
U.S.  Treasury  is  guaranteed  only as to the timely  payment of  interest  and
principal  when held to maturity.  The  guarantee  does not extend to the market
prices for such securities, which can fluctuate.

o Certain  U.S.  government  agency  securities  are  backed by the right of the
issuer to borrow from the U.S. Treasury,  or are supported only by the credit of
the issuer or  instrumentality.  While the U.S.  government  provides  financial
support to U.S. government-sponsored agencies or instrumentalities, no assurance
can be given that it will always do so.

o The  Fund  may be  unable  to sell  the  securities  underlying  a  repurchase
agreement  on a timely  basis if the other party  entering  into the  repurchase
agreement with the Fund defaults or becomes insolvent.



<PAGE>



[Logo]

Fees and Expenses

ANNUAL FUND OPERATING EXPENSES (deducted from Fund assets)

This table describes the Fund's expenses that you may pay indirectly if you hold
Fund shares.

Investment Advisory Fees                             .10%
Service Fee                                          .25%
Other Expenses1                                      .15%
Total Annual Fund Operating Expenses                 .50%

1 Since the Fund has not commenced  operations as of May 1, 2000, Other Expenses
are based on estimated amounts for the current fiscal year.

EXAMPLE

This  example is intended to help you compare the cost of  investing in 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 that you sell your
shares at the end of each  period.  The example also assumes that each year your
investment  has a 5% return and Fund  expenses  remain the same.  Although  your
actual costs and returns might be different, your approximate costs of investing
$10,000 in the Fund would be:

                                 1 Year      3 Years
                                -------      --------
                                    $57      $160



<PAGE>




INSTITUTIONAL TREASURY MONEY MARKET FUND(US)


[Logo]

Investment  Goal To  preserve  principal  value and  maintain  a high  degree of
liquidity while providing current income.
[Logo]

Principal Investment Strategies

         The Fund invests substantially all of its assets in U.S. Treasury money
market instruments,  repurchase  agreements in respect of these securities,  and
shares of money market funds that invest in U.S. Treasury obligations.

The Advisor  structures  the Fund's  portfolio  based on its outlook on interest
rates,  market conditions,  and liquidity needs. The Advisor adjusts the average
maturity of the Fund in  anticipation  of changes in short-term  interest rates.
Important  factors  include  an  assessment  of  Federal  Reserve  policy and an
analysis of the yield curve. [Logo]

Principal Risks of Investing in this Fund

o  The Fund may not be able to maintain a net asset value of $1.00 at all times.

o As  market  and  interest  rates  change  and as the  proceeds  of  short-term
securities  in the Fund's  portfolio  become  available  and are  reinvested  in
securities  with different  interest rates,  the Fund's yield will fluctuate.  A
sharp rise in interest rates could cause the Fund's share price to drop.

o A security  backed by the full  faith and credit of the United  States or U.S.
Treasury is guaranteed  only as to the timely  payment of interest and principal
when held to maturity.  The  guarantee  does not extend to the market prices for
such securities, which can fluctuate.

o The  Fund  may be  unable  to sell  the  securities  underlying  a  repurchase
agreement  on a timely  basis if the other party  entering  into the  repurchase
agreement with the Fund defaults or becomes insolvent.



<PAGE>



[Logo]

Fees and Expenses
ANNUAL FUND OPERATING EXPENSES (deducted from Fund assets)
This table describes the Fund's expenses that you may pay indirectly if you hold
Fund shares.

Investment Advisory Fees                             .10%
Service Fee                                          .25%
Other Expenses1                                      .15%
Total Annual Fund Operating Expenses                 .50%

1 Since the Fund has not commenced  operations as of May 1, 2000, other Expenses
are based on estimated amounts for the current fiscal year.

EXAMPLE

This  example is intended to help you compare the cost of  investing in 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 that you sell your
shares at the end of each  period.  The example also assumes that each year your
investment  has a 5% return and Fund  expenses  remain the same.  Although  your
actual costs and returns might be different, your approximate costs of investing
$10,000 in the Fund would be:

                                 1 Year      3 Years
                                --------     -------
                                    $57      $160



<PAGE>




Performance of Similarly Managed Mutual Funds

The bar charts and performance  tables below reflect the performance of ABN AMRO
Money  Market  Fund(US),  Government  Money Market  Fund(US) and Treasury  Money
Market Fund(US),  which are currently managed by the Advisor. These Money Market
Funds have investment goals,  policies and strategies  substantially the same as
those of the corresponding  Funds, and may be useful in evaluating the Advisor's
ability  to  manage  money  market  funds.   The  Money  Market  Funds  and  the
corresponding  funds are subject to the same Investment Company Act and Internal
Revenue Code restrictions.

Each Money Market Fund has two share classes, Common Shares and Investor Shares.
The bar charts and performance tables below reflect the performance of the Money
Market Funds'  Common  Shares.  Common Shares have lower  expenses than Investor
Shares.  As a result,  the performance of Investor Shares  historically has been
lower than that of the Common Shares. Common Shares, however, have expenses most
similar to those of the Funds. For that reason,  the performance  history of the
Common  Shares has been  presented  below,  rather than the  performance  of the
Investor Shares.

The  performance  information  below is not an  indicator  of the Fund's  future
performance;  does not reflect the Fund's historical performance; and relates to
a period of time before the effective date of the Funds'  registration  with the
SEC.

Money Market Fund(US)*

Average annual total return of the Money Market  Fund(US)  (Common Shares) as of
December 31, 1999.

 [Bar Chart]

                                                                 Best Quarter
                                                                        1.42%
                                                                      06/30/95


                                                                 Worst Quarter
                                                                         0.73%
                                                                      06/30/93
   [Plot points]

[1994/3.89%][1995/5.69%][1996/5.08%][1997/5.33%][1998/5.24%][1999/4.98%]


This table  compares the Fund's  average  annual  total  returns for the periods
ending  December 31, 1999, to those of the Money Fund Report  Averages(TM)/Total
Taxable  Average**.  An average measures the share prices of a specific group of
mutual funds with a particular investment goal. You cannot invest directly in an
average. The Money Fund Report Averages(TM)/Total Taxable Average is a composite
of mutual funds with investment goals similar to the Fund's goal.

                         1 Year   3 Years   5 Years     Since inception++

Money Market Fund(US)+     4.98%     5.24%    5.30%       4.78%

Money Fund Report Average(TM)/
Total Taxable Average      4.64%     4.92%     5.04%       4.52%

* Corresponding fund:  Institutional Prime Money Market Fund(US).

+ The ratio of expenses to average  net assets for the years 1994  through  1999
was 0.41%, 0.41%, 0.43%, 0.32%, 0.33%, 0.32%, respectively.

++ Fund inception (1/4/93).  Average inception computed from (12/31/92).

** iMoneyNet,  Inc.(formerly,  IBC Financial Data)


Government Money Market Fund(US) *

Average  annual total return of the  Government  Money Market  Fund(US)  (Common
Shares) as of December 31, 1999.

[Bar Chart]
                                                                    Best Quarter
                                                                           1.40%
                                                                        06/30/95


                                                                   Worst Quarter
                                                                          0.71%
                                                                       06/30/93
[Plot points]
[1994/3.89%][1995/5.59%][1996/5.08%][1997/5.33%][1998/5.24%][1999/4.87%]

This table  compares the Fund's  average  annual  total  returns for the periods
ending  December 31, 1999, to those of the Money Fund Report  Averages(TM)/Total
Government  Average**.  An average measures the share prices of a specific group
of mutual funds with a particular investment goal. You cannot invest directly in
an average.  The Money Fund Report  Averages(TM)/Total  Government  Average is a
composite of mutual funds with investment goals similar to the Fund's goal.

                             1 Year     3 Years     5 Years    Since inception++
                             ------     -------     -------    -----------------

Government Money Market
Fund(US)+                    4.87%       5.15%       5.22%        4.71%

Money Fund Report
Averages(TM)/Total
Government Average           4.55%       4.85%       4.97%        4.47%

*        Corresponding fund: Institutional Government Money Market Fund(US).

+ The ratio of expenses to average  net assets for the years 1994  through  1999
was 0.42%, 0.42%, 0.44%, 0.32%, 0.32%, 0.33% respectively.

++       Fund inception (1/4/93). Average inception computed from (12/31/92)

**       iMoneyNet, Inc.(formerly, IBC Financial Data)

Treasury Money Market Fund (US)*

Average  annual  total  return of the Treasury  Money  Market  Fund(US)  (Common
Shares) as of December 31, 1999.

[Bar chart]
                                                                    Best Quarter
                                                                           1.34%
                                                                        06/30/95

                                                                   Worst Quarter
                                                                           0.62%
                                                                        06/30/93

[1994/3.58%][1995/5.28%][1996/4.80%][1997/4.97%][1998/4.90%][1999/4.63%]



This table  compares the Fund's  average  annual  total  returns for the periods
ending  December 31, 1999,  to those of the Money Fund Report  Averages(TM)/U.S.
Treasury Average**.  An average measures the share prices of a specific group of
mutual funds with a particular investment goal. You cannot invest directly in an
average. The Money Fund Report Averages(TM)/U.S. Treasury Average is a composite
of mutual funds with investment goals similar to the Fund's goal.

                             1 Year     3 Years     5 Years   Since inception ++
                              ------     -------     -------    -----

Treasury Money Market
Fund(US)+                     4.63%        4.83%       4.92%     4.39%

Money Fund Report
Averages(TM)/Total
Government Average            4.21%         4.55%      4.71%     4.24%

*        Corresponding fund: Institutional Treasury Money Market Fund(US).

+ The ratio of expenses to average  net assets for the years 1994  through  1999
was 0.45%, 0.44%, 0.44%, 0.33%, 0.36%, respectively.

++    Fund inception (1/4/93). Average inception computed from (12/31/92).

**       iMoneyNet, Inc.(formerly, IBC Financial Data)



<PAGE>

Investment Advisor

The Advisor makes  investment  decisions for the Funds and reviews,  supervises,
and  administers  each  Fund's  investment  program.  The  Trustees of the Funds
supervise the Advisor and establish policies that the Advisor must follow in its
day-to-day management activities.

ABN AMRO  Asset  Management  (USA) Inc.  (Advisor),  208 South  LaSalle  Street,
Chicago,  IL 60604, serves as Advisor to the Funds. The Advisor was organized in
March 1991 under the laws of the State of Delaware  and is  registered  with the
Securities and Exchange  Commission  (SEC) under the Investment  Advisers Act of
1940, as amended  (Advisers Act). The Advisor manages assets for individuals and
institutions including corporations,  unions, governments,  insurance companies,
charitable  organizations and investment  companies.  The Advisor is an indirect
wholly-owned  subsidiary  of ABN AMRO Bank N.V.  and an  affiliate of the Funds'
Administrator.  As of December 31, 1999, the Advisor managed  approximately $8.4
billion in assets.

For the fiscal year ended  December  31, 1999,  the Funds paid the  following in
advisory fees: 0.10% for  Institutional  Prime Money Market Fund(US);  0.10% for
Institutional  Government  Money Market  Fund(US);  and 0.10% for  Institutional
Treasury  Money  Market  Fund(US).  As  of  December  31,  1999,   Institutional
Government  Money  Market  Fund(US)  and  Institutional  Treasury  Money  Market
Fund(US) had not yet commenced operations.

The  Advisor  may,  from  time to  time  and at its own  expense,  provide  cash
promotional  incentives,  in the form of cash or other compensation,  to certain
financial  institutions whose  representatives have sold or are expected to sell
significant amounts of the Funds' shares.  Some of these financial  institutions
may be affiliated with the Advisor.  The Advisor also may, from time to time and
at its own expense,  pay significant amounts to third parties,  such as brokers,
dealers and other financial institutions, for distribution assistance or related
services. These institutions may be affiliated with the Advisor.

Karen Van Cleave,  Senior Vice  President  of the  Advisor,  serves as portfolio
manager of each Fund.  Ms. Van Cleave  joined the  Advisor in January  1994 as a
Vice President and Portfolio Manager and became a Senior Vice President in 1997.
Prior to 1994,  Ms. Van Cleave was a Vice  President  and  Portfolio  Manager at
Chemical  Investment Group,  Ltd. for three years.  Prior to that, she worked at
Shearson  Lehman  Hutton (and its  predecessors)  for seven years in their money
market fund complex.  Ms. Van Cleave earned her B.S. in Business  Administration
from Boston University.



<PAGE>



Transaction Policies

Fund shares are offered to institutional investors,  acting for themselves or in
a fiduciary,  advisory,  agency,  and custodial or similar capacity.  Generally,
each institutional investor must open a single master account with the Fund. The
Funds may request investors to maintain separate master accounts for shares held
by the investor for its own account,  for the account of other  institutions and
for accounts  for which the  institution  acts as a fiduciary,  or in some other
capacity.  Institutions  purchasing  Institutional  Shares  on  behalf  of their
clients may establish their own transaction policies,  limitations and fees that
are  different  from the  transaction  policies,  limitations  and fees that are
described in this Prospectus.

Purchasing Shares

Shares are purchased at the Fund's net asset value (NAV). The NAV for each share
class of a Fund is calculated once a day, at 5 p.m.,  Eastern time (ET), on each
business  day,  excluding  major  holidays.  Currently  the  Funds  observe  the
following  holidays:  New Year's Day,  Martin Luther King, Jr. Day,  President's
Day,  Good Friday,  Memorial Day,  Independence  Day,  Labor Day,  Columbus Day,
Veterans Day, Thanksgiving Day and Christmas Day. An order will be priced at the
next NAV  calculated  after  the Fund  accepts  the  order.  Each  Fund uses the
amortized cost method to value its investments.  Portfolio securities are valued
at their purchase price,  adjusted for discounts or premiums  reflected in their
acquisition  cost.  The amortized cost method of valuation is designed to help a
Fund  maintain a  constant  price of $1.00 per share.  On  occasion,  fair value
prices may be determined  in good faith using  methods  approved by the Board of
Trustees.

Orders in proper form placed prior to 5:00 p.m.,  ET, and for which payments are
received in or converted  into Federal Funds by 6:00 p.m.,  ET, and orders which
are confirmed by  telephonic  confirmation,  will become  effective at the price
determined at 5:00 p.m., ET, on that day. Shares thus purchased will receive the
dividend declared on that day. All times are Eastern Standard time.

Minimum Investment

The minimum initial investment in Institutional  Shares is $1,000,000.  There is
no minimum subsequent  investment amount for Institutional  Shares. In addition,
there is no minimum initial or subsequent  investment  minimum for affiliates of
the Advisor. A Fund may waive or lower purchase minimums in other circumstances.

Selling Shares

Investors may redeem shares at any time, by wire or telephone. The investor will
receive  the  next NAV  calculated  after  the  Fund's  transfer  agent or other
authorized agent accepts the investor's order.  Ordinarily,  redemption proceeds
are sent to investors within seven days of a redemption request.

Selling  recently  purchased  shares  may  result  in a delay in  receipt  of an
investor's  redemption proceeds of up to eight business days or until a Fund has
collected payment from the investor.

General Policies

The Funds will not be responsible for any fraudulent  telephone order,  provided
that they take reasonable  measures to verify the order and the investor did not
decline telephone privileges on the application.

The Funds have the right to:

o change or waive the minimum investment amounts;

o refuse any  purchase or exchange  of shares if it could  adversely  affect the
Fund or its operations;

o change or  discontinue  exchange  privileges or temporarily  suspend  exchange
privileges during unusual market conditions (see Investor Services);

o delay sending redemption proceeds for up to seven days (generally applies only
in cases of very large  redemptions,  excessive trading or during unusual market
conditions); and

o   suspend redemptions as permitted by law (e.g., emergency situations).

Each Fund may also  make a  "redemption  in kind"  under  certain  circumstances
(e.g., if the Advisor  determines that the amount being redeemed is large enough
to affect Fund  operations).  Investors  who receive a redemption in kind may be
required to pay brokerage costs to sell the securities  distributed by the Fund,
as well as the taxes on any gain from the sale.

Distributions and Taxes

Typically,  each Fund pays its  shareholders  dividends  from its net investment
income once a month,  and  distributes  any net capital  gains once a year.  The
Funds do not expect to distribute  capital gains to shareholders.  Dividends and
distributions  are  reinvested  in  additional  Fund shares  unless the investor
instructs the Fund otherwise.

Fund  distributions,  regardless  of whether  received in cash or  reinvested in
additional  shares, may be subject to federal income tax. An exchange is treated
as a taxable event.

Each investor's tax situation is unique. Investors should consult a professional
about federal, state and local tax consequences.

Investor Services
Exchange Privilege

An investor  may  exchange  Institutional  Shares of any Fund for  Institutional
Shares of any other Fund by  requesting  an exchange in writing or by telephone.
New accounts  established  through an exchange will have the same  privileges as
the original  account (as long as they are  available).  Please read the current
Prospectus for a Fund before exchanging into it.

Account Statements

Every investor receives regular account statements.  Investors will also receive
an annual statement that describes the tax  characteristics of any dividends and
distributions the Fund has paid to the investor during the year.

Shareholder Mailings

To help reduce Fund expenses and environmental waste, the Funds combine mailings
for multiple  accounts going to a single  household by delivering Fund financial
reports  (annual  and  semi-annual  reports,  prospectuses,  etc.)  in a  single
envelope. If you do not want us to continue consolidating your Fund mailings and
would prefer to receive separate  mailings with multiple copies of Fund reports,
please call one of our Institutional Fund Representatives at 1-888-838-5132.


<PAGE>


Instructions for Account Transactions

To Establish an Account

Please call an Institutional Fund Representative at 1-888-838-5132 before wiring
funds.

By Wire - Transmit  your  investment to Boston Safe Deposit and Trust with these
instructions:

 .    ABA #011001234
     fund name and DDA#
     Boston, Massachusetts
     -  ABN AMRO Institutional Prime Money Market Fund(US)
        DDA #24-4481
     -  ABN AMRO Institutional Government Money Market Fund(US)
         DDA #24-4481
     -  ABN AMRO Institutional Treasury Money Market Fund(US)
         DDA #24-4481
 .    the Institutional Service Share class
 .    your Social Security or tax ID number
 .    account registration
 .    dealer number, if applicable
 .    account number

Call us to obtain an account number.  Return your  application  with the account
number on the application.

To Buy Additional Shares

Please call an Institutional Fund Representative at 1-888-838-5132 before wiring
funds.

By Wire - Transmit  your  investment to Boston Safe Deposit and Trust with these
instructions:

 .  ABA #011001234
   fund name and DDA#
   Boston, Massachusetts
   -  ABN AMRO Institutional Prime Money Market Fund(US)
       DDA 24-4481
   -  ABN AMRO Institutional Government Money Market Fund(US)
       DDA 24-4481
   -  ABN AMRO Institutional Treasury Money Market Fund(US)
       DDA 24-4481
 .  the Institutional Share class
 .  your Social Security or tax ID number
 .  account registration
 .  dealer number, if applicable

To Sell Shares

Please  call an  Institutional  Fund  Representative  at  1-888-838-5132  before
redeeming shares.

By Wire - Be sure the Fund has your bank account  information on file.  Proceeds
will be wired to your bank.


To open an account,  make  subsequent  investments,  or to sell  shares,  please
contact your ABN AMRO Institutional Fund Representative or call:

1-888-838-5132



<PAGE>



For More Information

More  information  about the  Funds is  available  without  charge  through  the
following:

Statement of Additional Information

More  detailed  information  about the Funds is in the  Statement of  Additional
Information. The Statement of Additional Information has been filed with the SEC
and is  incorporated  by  reference  into this  Prospectus.  This means that the
Statement  of  Additional  Information,  for legal  purposes,  is a part of this
Prospectus.

Annual and Semi-Annual Reports

These reports list the Fund's holdings and contain  information  from the Fund's
portfolio  managers about the Fund  strategies and recent market  conditions and
trends.

By Telephone:

Call 1-888-838-5132

By Mail:

Write to the Funds c/o

ABN AMRO Funds
P.O. Box 9690
Providence, RI 02940

On the World Wide Web:

www.abnamrofunds-usa.com
(The  website  is a  separate  document  and  is not  legally  a  part  of  this
Prospectus.)

From the SEC:

You can  also  obtain  the  Statement  of  Additional  Information,  annual  and
semi-annual  reports and other  information  about Funds from the SEC's  website
(http://www.sec.gov).  You may  review  and  copy  documents  at the SEC  Public
Reference  Room in  Washington,  D.C. (for  information,  call  1-202-942-8090).
Copies of this information may also be obtained, after paying a duplicating fee,
by electronic request to the following E-mail address:  [email protected] or by
writing the Commission's Public Reference Section,  Washington, D.C. 20549-0102.
The ABN AMRO Fund's Investment Company Act registration number is 811-07244.

Investment Advisor:
ABN AMRO Asset Management (USA) Inc.
208 South LaSalle Street
4th Floor
Chicago, IL 60604-1003

Distributor:
Provident Distributors, Inc.
3200 Horizon Drive
King of Prussia, PA 19406


No  one  has  been   authorized  to  give  any   information   or  to  make  any
representations  not  contained in the  Prospectus  or  Statement of  Additional
Information in connection  with the offering of Fund shares.  Do not rely on any
such  information or  representations  as having been authorized by the Funds or
Provident Distributors,  Inc. This Prospectus does not constitute an offering by
the Funds in any jurisdiction where such an offering is not lawful.


For more information, please call the ABN AMRO Funds or visit the website:

1-888-838-5132
www.abnamrofunds-usa.com


ABN-F-020-00600



<PAGE>


                                 ABN AMRO Funds
                   Institutional Prime Money Market Fund(US)
                  Institutional Treasury Money Market Fund(US)
                 Institutional Government Money Market Fund(US)
                          Institutional Service Shares

                     Supplement dated June 30, 2000 to the
                          Prospectus dated May 1, 2000

This supplement provides new and additional information beyond that contained in
the Prospectus for the  Institutional  Service Shares of the Trust and it should
be retained and read in conjunction with that Prospectus.

Institutional Service Shares:

Currently,  Institutional Service Shares of Institutional  Treasury Money Market
Fund(US) and Institutional  Government Money Market Fund(US) are not offered for
sale by the Trust.












               PLEASE RETAIN THIS SUPPLEMENT FOR FUTURE REFERENCE




   For more information, please call the ABN AMRO Funds or visit the website:
                                 1-888-838-5132
                            www.abnamrofunds-usa.com





ABN-A-038-0100



<PAGE>



                                 ABN AMRO Funds

                   Institutional Prime Money Market Fund(US)
                  Institutional Treasury Money Market Fund(US)
                 Institutional Government Money Market Fund(US)
                              Institutional Shares
                          Institutional Service Shares

                     Supplement dated June 30, 2000 to the
             Statement of Additional Information dated May 1, 2000

This supplement provides new and additional information beyond that contained in
the  Statement  of  Additional  Information  for the  Institutional  Shares  and
Institutional  Service Shares of the Trust and it should be retained and read in
conjunction with that Statement of Additional Information.

Institutional Shares:

Currently,  Institutional Shares of Institutional Treasury Money Market Fund(US)
and  Institutional  Government Money Market Fund(US) are not offered for sale by
the Trust.

Institutional Service Shares:

Currently,  Institutional  Treasury  Money  Market  Fund(US)  and  Institutional
Government Money Market Fund(US) are not offered for sale by the Trust.










               PLEASE RETAIN THIS SUPPLEMENT FOR FUTURE REFERENCE



   For more information, please call the ABN AMRO Funds or visit the website:
                                 1-888-838-5132
                            www.abnamrofunds-usa.com




ABN-F-009-0060




<PAGE>



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