NORTHERN INSTITUTIONAL FUNDS
485APOS, 1999-08-06
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     As filed with the Securities and Exchange Commission on August 6, 1999
                 Securities Act of 1933 Registration No. 2-80543
            Investment Company Act of 1940 Registration No. 811-3605

                   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. 40             [X]

                                                      and/or

REGISRTATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940

         Amendment No. 41                   [X]
                                         (Check appropriate box or boxes)



                          NORTHERN INSTITUTIONAL FUNDS
               (Exact name of registrant as specified in charter)

                             50 South LaSalle Street
                             Chicago, Illinois 60675
                    (Address of principal executive offices)

              (Registrant's Telephone Number, including Area Code)
                                  800-637-1380



Linda Hoard, Secretary                               with a copy to:
First Data Investor Services Group, Inc.             W. Bruce McConnel, III
101 Federal Street, 6th Floor                        Drinker Biddle & Reath LLP
Boston, Massachusetts 02110                          One Logan Square
                                                     18th and Cherry Streets
                                                     Philadelphia, Pennsylvania
                                                     19103-6996

                    (name and address of agent for service)

          Approximate Date of Proposed Public  Offering:  As soon as practicable
     after this Registration Statement becomes effective.

It Is Proposed That This Filing 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)
         [   ] On (date)pursuant to paragraph (a)(1)
         [X] 75 days after filing pursuant to paragraph (a)(2)
         [   ] On (date) pursuant to paragraph (a)(2)

If appropriate, check the following box:
         [   ] This post-effective amendment designates a new effective
               date for a previously filed post-effective amendment.

                                             Northern Institutional Funds

                         SMALL COMPANY GROWTH PORTFOLIO

                                OCTOBER ___, 1999






                          Northern Institutional Funds




         Small Company Growth Portfolio

Prospectus dated October ___, 1999

     An  investment  in the  Portfolio  is not a deposit  of any bank and is not
insured or guaranteed by the Federal Deposit Insurance  Corporation or any other
government  agency.  An investment in the Portfolio  involves  investment risks,
including possible loss of principal.

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

Contents

RISK/RETURN SUMMARY  SMALL COMPANY GROWTH PORTFOLIO
___
<TABLE>
<CAPTION>
<S>                                          <C>                                                                        <C>

Information about the
objective, principal strategies              Principal Investment Risks                                                  ___
and risk characteristics
of the Portfolio                             Portfolio Performance

                                             Portfolio Fees and Expenses                                                  ___
_______________________________________________________________________________

MANAGEMENT                                   Investment Adviser                                                          ___
OF THE
PORTFOLIO                                    Advisory Fees                                                               ___

                                             Portfolio Management                                                        ___

                                             Other Portfolio Management Information                                      ___

                                             Other Portfolio Services                                                    ___
________________________________________________________________________________

ABOUT YOUR                                   Purchasing and Selling Shares                                               ___
ACCOUNT
                                                  Purchasing Shares                                                      ___
How to open, maintain
and close an account                              Opening an Account                                                     ___

                                                  Selling Shares                                                         ___

                                            Account Policies and Other Information                                       ___

                                                  Purchase and Redemption Minimums                                       ___

                                                  Calculating Share Price                                                ___

                                                  Timing of Purchase Requests                                            ___

                                                  Additional Transaction Fee                                             ___

                                                  Tax Identification Number                                              ___

                                                  In-Kind Purchases and Redemptions                                      ___

                                                  Miscellaneous Purchase Information                                     ___

                                                  Timing of Redemption and Exchange Requests                             ___

                                                  Miscellaneous Redemption Information                                   ___

                                                  Exchange Privileges                                                    ___

                                                  Telephone Transactions                                                 ___

                                                  Making Changes to Your Account Information                             ___

                                                  Business Day                                                           ___

                                                  Early Closings                                                         ___

                                                  Authorized Intermediaries                                              ___

                                                  Servicing Agents                                                       ___

                                             Dividends and Distributions                                                 ___

                                             Tax Considerations                                                          ___

                                             Year 2000 Issues                                                            ___
____________________________________________________________________________________________________________________________

APPENDIX                                     Special Risks and Other Considerations                                      ___

                                             Additional Description of Securities and Investment Techniques              ___
____________________________________________________________________________________________________________________________

FOR MORE INFORMATION                         Statement of Additional Information                                         ___

</TABLE>


     Northern Institutional Funds (the "Trust") offers a selection of investment
portfolios to institutional investors, each with a distinct investment objective
and risk/reward profile.

     This Prospectus describes the Small Company Growth Portfolio.  Descriptions
of the six  fixed  income,  five  money  market,  one  balanced  and six  equity
portfolios  (the  "Portfolios")  that make up the  remainder  of the  Portfolios
currently offered by the Trust are included in separate prospectuses.  The Small
Company Growth Portfolio (as well as the other non-money  market  Portfolios) is
authorized  to offer  three  classes  of  shares:  Class A,  Class C and Class D
Shares.

     In addition to the  instruments  described  on the pages  below,  the Small
Company Growth  Portfolio may use various  investment  techniques in seeking its
investment  objective.  You can learn  more  about  these  techniques  and their
related  risks by reading the Appendix to this  Prospectus  and the Statement of
Additional Information.

Please  keep  in  mind  that  the   Portfolio  can  not guarantee it will meet
its  investment  objective,  and that the  Portfolio  should  not be  relied
 upon  as a  complete investment program.

SMALL COMPANY GROWTH PORTFOLIO

INVESTMENT OBJECTIVE

The  Portfolio  seeks to  provide  long-term  capital  appreciation.  Any income
received  is  incidental  to this objective. The Portfolio's investment
objective may be changed without shareholder approval.

PRINCIPAL INVESTMENT STRATEGIES

     In seeking long-term capital appreciation, the Portfolio will invest, under
normal  market  conditions,  at least  65% of its  total  assets  in the  equity
securities  of companies  with market  capitalizations  that are, at the time of
purchase,  within the range of the Russell 2000 Small Stock Index ("Russell 2000
Index").

     Using  fundamental  research  and  quantitative  analysis,  the  investment
management  team  selects  stocks  of  small  companies  that it  believes  have
demonstrated  above  average  sales and  earnings  growth  and  return on equity
relative to their peers.  In doing so, the investment  management team considers
factors such as a company's:

          o           Financial condition;

          o           Market share and product leadership;

          o           Earnings growth relative to relevant competitors;

          o           Market valuation in comparison to other stocks and the
                         stock's own historical norms;

          o           Price trends; and

          o           Other investment criteria.


     As of September 30, 1999, the approximate  market  capitalization  range of
the companies  included in the Russell 2000 Index was between $_________ million
and $____________  billion. The stocks in which the Portfolio invests may or may
not be included in the Russell 2000 Index.

     Although the Portfolio  primarily invests in the stocks of U.S.  companies,
it may invest a portion of its assets in the securities of foreign issuers.

     Russell does not endorse any stock in the Index. It is not a sponsor of the
Small Company Growth  Portfolio and is not affiliated  with the Portfolio in any
way.

     More information on the Portfolio's investment strategies and techniques is
provided in the Appendix to this Prospectus.

PRINCIPAL INVESTMENT RISKS

     All  investments  carry some  degree of risk which will affect the value of
the  Portfolio's  investments,  its investment  performance and the price of its
shares. As a result, loss of money is a risk of investing in the Portfolio.

     An  investment  in the  Portfolio  is not a deposit  of any bank and is not
insured or guaranteed by the Federal Deposit Insurance  Corporation or any other
government agency.

     The following  summarizes  the principal  risks that apply to the Portfolio
and may result in a loss of your investment.

RISKS

o          MARKET RISK is the risk that the value of the securities in which the
           Portfolio invests may go up or down in response to the prospects of
           individual companies and/or general economic conditions. Price
           changes may be temporary or last for extended periods.

o          MANAGEMENT RISK is the risk that a strategy used by the investment
           management team may fail to produce the intended results.

o          LIQUIDITY RISK is the risk that the Portfolio will not be able to pay
           redemption proceeds within the time periods described in this
           Prospectus because of unusual market conditions, an unusually high
           volume of redemption requests or other reasons.

o          YEAR 2000 RISK is the risk that the Portfolio's operations or value
           will be adversely affected by the "Year 2000 Problem." This risk may
           be of greater significance with respect to the Portfolio's
           investments in the securities of foreign issuers. (For more
           information, please see "Year 2000 Issues" on page __.)

o          STOCK RISK is the risk that stock prices have historically risen and
           fallen in periodic cycles. As of the date of this Prospectus, U.S.
           stock markets and certain foreign stock markets were trading at or
           close to record high levels. There is no guarantee that such levels
           will continue.

o          SMALL COMPANY STOCK RISK is the risk that stocks of smaller companies
           may be subject to more abrupt or erratic market movements than stocks
           of larger, more established companies. Small companies may have
           limited product lines or financial resources, or may be dependent
           upon a small or inexperienced management group. In addition, small
           company stocks typically are traded in lower volume, and their
           issuers typically are subject to greater degrees of changes in their
           earnings and prospects.

     More information  about the risks of investing in the Portfolio is provided
in the  Appendix to this  Prospectus.  You should  carefully  consider the risks
discussed in this section and the Appendix before investing in the Portfolio.

PORTFOLIO PERFORMANCE

     Since the  Portfolio  has less than one calendar  year of  performance,  no
performance information is provided.


PORTFOLIO FEES AND EXPENSES

     This table  describes the fees and expenses that you may pay if you buy and
hold Class A, C or D Shares of the  Portfolio.  Each class of shares  represents
pro rata interests in the Portfolio except that different  shareholder servicing
and transfer agency fees are payable due to the varying levels of administrative
support and transfer agency services provided to each class.

     Please  note that the  following  information  does not reflect any charges
which  may  be  imposed  by  The  Northern   Trust  Company,   its   affiliates,
correspondent  banks  and  other  institutions  on their  customers.  (For  more
information, please see "Account Policies and Other Information" on page __.)
<TABLE>
<CAPTION>
<S>                                                                     <C>           <C>             <C>

                                                                        Class A       Class C         Class D
                  SMALL COMPANY GROWTH PORTFOLIO                        Shares        Shares          Shares

Shareholder Fees (fees paid directly from your investment)

Sales Charge (Load) Imposed on Purchases                               None          None            None

Additional Transaction Fee (as a percentage of amount                  None          None            None
invested)

Deferred Sales Charge (Load)                                           None          None            None

Sales Charge (Load) Imposed on Reinvested Distributions                None          None            None

Redemption Fees                                                        None          None            None

Exchange Fees                                                          None          None            None


                                                                       Class A        Class C         Class D
                  SMALL COMPANY GROWTH PORTFOLIO                       Shares         Shares          Shares

Annual Portfolio Operating Expenses
(expenses that are deducted from Portfolio Assets)1

   Management Fees2                                                   1.10%          1.10%           1.10%

   Distribution (12b-1) Fees                                          None           None            None

   Servicing Fees                                                     None           0.15%           0.25%

   Transfer Agency Fees                                               0.01%          0.10%           0.15%

   Other Operating Expenses3                                          0.18%          0.18%           0.18%

   Total Other Operating Expenses                                     0.19%          0.43%           0.58%

   Total Annual Portfolio Operating Expenses4                         1.29%          1.53%           1.68%
</TABLE>

     1 The Portfolio's  annual  operating  expenses are based on actual fees and
estimated expenses for the current fiscal year.

     2  As  of  the  date  of  this  Prospectus,   the  Northern  Trust  Company
("Northern")  is  voluntarily  waiving a portion of its  management  fee for the
Portfolio.  As a result of the fee waiver,  actual management fees to be paid by
the Portfolio are 0.80% of the Portfolio's average daily net assets. Fee waivers
may be terminated at any time at the option of Northern.

     3 "Other  Expenses"  include  administration  fees and all  other  ordinary
operating  expenses of the Portfolio  not listed above.  Northern and First Data
Investor  Services  Group,  Inc.  ("First  Data  Investor  Services  Group")  as
co-administrators  are entitled to a co-administration fee from the Portfolio at
an  annual  rate of 0.10% of the  Portfolio's  average  daily  net  assets.  The
co-administrators  have agreed to reimburse expenses  (including fees payable to
Northern  and First  Data  Investor  Services  Group as  co-administrators,  but
excluding   management   fees,   transfer   agency  fees,   servicing  fees  and
extraordinary  expenses)  which  exceed  on an  annualized  basis  0.10%  of the
Portfolio's average daily net assets. As a result of the expense  reimbursement,
estimated "Other Expenses" are currently 0.10% of the Portfolio's  average daily
net assets.

     4 As a result of the fee  waivers  and  expense  reimbursements,  estimated
actual total annual operating expenses for the Portfolio is set forth below. Fee
waivers (and voluntary expense reimbursements,  if applicable) may be terminated
at any  time at the  option  of  Northern.  If  this  occurs,  "Other  Operating
Expenses" may increase without shareholder approval.

                                               Total Annual Operating Expenses
Small Company Growth Portfolio
         Class A                                            0.91%
         Class C                                            1.15%
         Class D                                            1.30%

EXAMPLE

     The following Example is intended to help you compare the cost of investing
in the Portfolio (without fee waivers and expense  reimbursements) with the cost
of investing in other mutual funds.

     The Example  assumes that you invest  $10,000 in the Portfolio for the time
periods  indicated (with  reinvestment of all dividends and  distributions)  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 Portfolio's
operating expenses remain the same.  Although your actual costs may be higher or
lower, based on these assumptions your costs would be:

                                             1 Year                    3 Years

SMALL COMPANY GROWTH PORTFOLIO

Class A                                      $131                       $409

Class C                                      $156                       $483

Class D                                      $171                       $530

                                            MANAGEMENT OF THE PORTFOLIO

Investment Adviser

     The Northern Trust Company ("Northern"),  an Illinois  state-chartered bank
and member of the Federal Reserve System,  serves as investment  adviser for the
Portfolio.

     Northern  is  referred  to as  the  "Investment  Adviser."  The  Investment
Adviser,  is located at 50 S. LaSalle Street,  Chicago, IL 60675 and is a wholly
owned subsidiary of Northern Trust  Corporation,  a bank holding company.  As of
September  30,  1999,  Northern  Trust  Corporation  and  its  subsidiaries  had
approximately  $____  billion in assets,  $____ billion in deposits and employed
over ______ persons.

     Northern and its affiliates  administered in various capacities  (including
as master trustee,  investment manager or custodian) approximately $___ trillion
of assets as of September  30, 1999,  including  approximately  $____ billion of
assets  for  which  Northern  and  its  affiliates  had  investment   management
responsibility.

     Under its Advisory Agreement with the Trust, the Investment Adviser subject
to the general supervision of the Trust's Board of Trustees,  is responsible for
making investment  decisions for the Portfolio and for placing purchase and sale
orders for portfolio securities.

Advisory Fees

     As  compensation  for its advisory  services and its  assumption of related
expenses,  the Investment Adviser is entitled to an advisory fee, computed daily
and payable  monthly,  at an annual  contractual  rate of 1.10%  (expressed as a
percentage of the Portfolio's average daily net assets).

     The  difference,  if any,  between  this  contractual  advisory fee and the
actual  advisory  fee  that is paid  by the  Portfolio  will  reflect  that  the
Investment  Adviser did not charge the full amount of the  advisory fee to which
it was entitled.  The Investment Adviser may discontinue or modify its voluntary
limitation in the future at its discretion.

Portfolio Management

     The Investment Adviser employs a team approach to the investment management
of the Portfolio,  relying upon investment professionals under the leadership of
James M.  Snyder,  Chief  Investment  Officer and  Executive  Vice  President of
Northern.

     The management team leader for the Small Company Growth  Portfolio is David
H.   Burshtan,   Vice  President  of  Northern.   Mr.   Burshtan  has  had  such
responsibility since the Portfolio commenced operations in [October 1999]. Prior
to joining  Northern,  Mr. Burshtan was a Portfolio  Manager with Scudder Kemper
Investments, Inc. for the Kemper Small Capitalization Equity Fund.

Other Portfolio Services

     Northern also serves as transfer agent ("Transfer Agent") and custodian for
the Portfolio.  As Transfer  Agent,  Northern  performs  various  administrative
servicing functions, and any shareholder inquiries should be directed to it. The
fees that Northern  receives for its services in those  capacities are described
on page  ____  under  "Portfolio  Fees and  Expenses"  and in the  Statement  of
Additional  Information.  Northern and First Data Investor  Services Group, Inc.
("First  Data  Investor  Services"),  a  wholly-owned  subsidiary  of First Data
Corporation,   serve  as  co-administrators   for  the  Portfolio.   First  Data
Distributors,  Inc.  ("FDDI"),  a subsidiary  of First Data  Investor  Services,
serves as distributor  for the Portfolio.  The fees that Northern and First Data
Investor  Services  receive for their services in these capacities are described
on page ___ under  "Portfolio  Fees and  Expenses."  FDDI does not  receive  any
compensation from the Trust for its distribution services.

                               ABOUT YOUR ACCOUNT

Purchasing and Selling Shares

PURCHASING SHARES

     Institutional  investors,  acting on their own behalf or on behalf of their
customers,  clients,  employees,  participants  and  others  ("Customers"),  may
purchase  shares  of the  Portfolio  through  their  institutional  accounts  at
Northern or an affiliate. They may also purchase shares directly from the Trust.
There is no sales charge imposed on purchases of shares. Institutional investors
include:

      Northern and its affiliates;
      Defined  contribution  plans  having at least $30  million in assets or
     annual  contributions  of at least $5 million; and
      Other institutions and organizations.

     The Portfolio  currently offers a choice of three classes of shares to meet
the special needs of institutional investors ("Institutions").

     Class A Shares are designed for  Institutions  that can obtain  information
about their  shareholder  accounts  and do not require the  additional  services
available to other classes.

     Class C Shares are  designed  for  Institutions  that  require the Transfer
Agent and a Servicing Agent to provide certain account-related services incident
to Customers being the beneficial owners of shares.

     Class D Shares are  designed  for  Institutions  that  require the Transfer
Agent and a Servicing  Agent to provide  them and their  Customers  with certain
account-related services and other information.

     Different  shareholder  servicing  and transfer  agency fees are payable by
each  class of  shares  (see  "Portfolio  Fees and  Expenses"  on page  __).  In
addition,  any person entitled to receive  compensation for selling or servicing
shares of the Portfolio may receive  different  compensation with respect to one
particular class of shares over another.

OPENING AN ACCOUNT

     You may purchase shares of the Portfolio through your institutional account
at Northern (or an affiliate) or you may open an account directly with the Trust
with a minimum initial investment of $5 million in the Portfolio and one or more
other  investment  Portfolios of the Trust.  There is no minimum for  subsequent
investments.

     Through an  Institutional  Account.  If you are  opening  an  institutional
account at Northern, a Northern representative can assist you with all phases of
your investment.  To purchase shares through your account, contact your Northern
representative for further information.

     Directly from the Trust. An Institution may open a shareholder  account and
purchase  shares  directly  from the  Trust  as  described  in this  Prospectus.
________________________________________________________________________________
By Mail

Read this Prospectus carefully.

Complete and sign the new account application.

Include a certified corporate resolution (or other acceptable evidence of
authority).

Enclose a check or Federal Reserve draft payable to the Portfolio.

Mail your check, corporate resolution and completed application to:

        Northern Institutional Funds
        c/o The Northern Trust Company
        P.O. Box 75943
        Chicago, Illinois 60675-5943

     All checks must be payable in U.S.  dollars and drawn on a bank  located in
the  United   States.   Cash  and  third  party   checks  are  not   acceptable.
_______________________________________________________________________________

By Telephone

Read this Prospectus carefully.

Call the Transfer Agent at 1-800-637-1380.

To open a new account please provide:

      The name of the Portfolio
      The number of shares or dollar amount to be invested
      The method of payment

To add to an existing account, please provide:

      The Institution's name
      Your Account Number
_______________________________________________________________________________

By Wire or Automated Clearing House Transfer ("ACH Transfer")

To open a new account:

Call the Transfer Agent at 1-800-637-1380 for instructions.

For more information about the purchase of shares, call the Transfer Agent
at 1-800-637-1380.

To add to an existing account:

Have your bank wire Federal funds or effect an ACH Transfer to:

        The Northern Trust Company
        Chicago, Illinois
        ABA Routing No. 0710-00152
        (Reference 10 Digit Portfolio Account No.)
        (Reference Shareholder's Name)
_______________________________________________________________________________

SELLING SHARES

Through an Institutional Account.

     Institutions may sell (redeem) shares through their  institutional  account
by contacting their Northern account representative.

     Directly through the Trust. Institutions that purchase shares directly from
the Trust may redeem  their  shares  through  the  Transfer  Agent in one of the
following ways:
________________________________________________________________________________

By Mail

Send a written request to:

        Northern Institutional Funds
        c/o The Northern Trust Company
        P.O. Box 75943
        Chicago, Illinois 60675-5943

The letter of instruction must include:

      The signature of a duly authorized person
      Your account number
      The name of the Portfolio
      The number of shares or the dollar amount to be redeemed
_______________________________________________________________________________

By Telephone

     Call the Transfer Agent at 1-800-637-1380  for instructions  During periods
of unusual economic or market activity,  telephone  redemptions may be difficult
to implement. In such event,  shareholders should follow the procedures outlined
above        under        "Selling        Shares        -       By        Mail."
_______________________________________________________________________________

By Wire

      Call the Transfer Agent at 1-800-637-1380 for instructions.
      You must have given prior authorization for expedited wire redemption.
      The minimum amount that may be redeemed by this method is $10,000.

Account Policies and Other Information

     Purchase and Redemption Minimums.  There is a minimum initial investment of
$5 million in the Portfolio and one or more other  investment  Portfolios of the
Trust. There is no minimum for subsequent investments. A $10,000 minimum applies
for  redemptions  by wire.  The Trust  reserves the right to waive  purchase and
redemption minimums and to determine the manner in which a minimum is satisfied.

     Calculating  Share Price. The Trust issues shares and redeems shares at net
asset value ("NAV"). The NAV for each share class of the Portfolio is calculated
by dividing the value of the Portfolio's net assets  attributed to that class by
the  number of  outstanding  shares  of that  class.  The NAV for each  class is
calculated  as of 3:00 p.m.,  Chicago  time,  each Business Day. The NAV used in
determining the price of your shares is the one calculated  after your purchase,
exchange or redemption order is received and accepted as described below.

     U.S. and foreign  securities held by the Portfolio  generally are valued at
their market prices.  Shares of an investment  company held by the Portfolio are
valued  at  their  net  asset  value.  Any  securities,   including   restricted
securities, for which market prices are not readily available are valued at fair
value as determined by the Investment  Adviser.  Short-term  obligations held by
the  Portfolio  are  valued at their  amortized  cost  which,  according  to the
Investment Adviser, approximates market value.

     The Portfolio may hold foreign  securities  that trade on weekends or other
days when the Portfolio does not price its shares.  Therefore, the value of such
securities may change on days when  shareholders will not be able to purchase or
redeem shares.

     Timing of Purchase  Requests.  Requests  accepted by the Transfer  Agent or
other  authorized  intermediary by 3:00 p.m.,  Chicago time, on any Business Day
will be  executed  the same day,  at that day's  closing  share  price (plus any
additional transaction fee) provided that either:

      The Transfer  Agent  receives the purchase  price in Federal or other
      immediately  available  funds prior to 3:00 p.m., Chicago time, on the
          same Business Day;
      The order is accepted by an authorized  intermediary  and payment in
      Federal or other  immediately  available funds is made on the next
      Business Day according to procedures authorized by the Trust; or
      Payment  in  Federal  or other  immediately  available  funds is received
      on the  next  Business  Day in an institutional account maintained
     with Northern or an affiliate.

     Orders received by the Transfer Agent or other authorized intermediary on a
non-Business  Day or after 3:00 p.m.  on a Business  Day will be executed on the
next  Business  Day, at that day's  closing  share  price  (plus any  additional
transaction  fee),  provided  that  payment  is  made  as  noted  above.  If  an
Institution  pays for  shares by check,  Federal  funds  generally  will  become
available within two Business Days after a purchase order is received.

     In certain circumstances,  the Trust may advance the time by which purchase
orders must be received. See "Early Closings" on page __.

     Tax Identification  Number.  Federal  regulations require you to provide to
the Transfer  Agent a taxpayer  identification  number when you open an account.
Purchase  orders  without such a number or an indication  that a number has been
applied for will not be  accepted.  If you have  applied for a number,  you must
provide it to the Transfer Agent within 60 days of the date of the order.

     In-Kind  Purchases and Redemptions.  The Trust reserves the right to accept
payment for shares in the form of securities  that are  permissible  investments
for the  Portfolio.  The Trust also reserves the right to pay  redemptions  by a
distribution  "in-kind" of securities (instead of cash) from the Portfolio.  See
the Statement of Additional  Information for further information about the terms
of these purchases and redemptions.

Miscellaneous Purchase Information.

      Institutions are responsible for transmitting  purchase orders to the
      Transfer Agent and delivering  required
     funds on a timely basis.
      Institutions  are  responsible  for all losses and  expenses of the
      Portfolio in the event of any failure to
     make payment  according to the  procedures  outlined in this  Prospectus.
     Northern may redeem shares from any
     account it maintains to protect the  Portfolio and Northern  against  loss.
     In addition,  a $20 charge will be
     imposed if a check does not clear.
      The Trust  reserves the right to reject any purchase  order.
      The Trust also  reserves the right to change or
     discontinue any of its purchase procedures.

     Timing  of  Redemption  and  Exchange  Requests.  Redemption  and  exchange
requests  received  in good  order by the  Transfer  Agent  or other  authorized
intermediary  by 3:00 p.m.,  Chicago time, on a Business Day will be executed on
the same day. The  redemption or exchange will be effected at that day's closing
share price  (plus any  additional  transaction  fee, in the case of an exchange
into certain Portfolios).  Redemption proceeds will normally be sent or credited
on the next Business Day.

     Orders  received  in good order on a  non-Business  Day or after 3:00 p.m.,
Chicago  time, on a Business Day will be executed the next Business Day, at that
day's closing share price (plus any additional  transaction  fee, in the case of
an exchange  into certain  Portfolios).  The proceeds  will  normally be sent or
credited  the second  Business  Day. We consider  requests to be in "good order"
when all  required  documents  are  properly  completed,  signed  and  received,
including a  certified  corporate  resolution  or other  acceptable  evidence of
authority.

     In  certain  circumstances,  the  Trust  may  advance  the  time  by  which
redemption and exchange  orders must be received.  See "Early  Closings" on page
__.

     Miscellaneous Redemption Information.  All redemption proceeds will be sent
by check unless the Transfer Agent is directed  otherwise.  Redemption  proceeds
may also be wired.  A redemption  request may not be processed if a  shareholder
has failed to submit a completed and properly executed new account  application,
including a corporate resolution or other acceptable evidence of authority.

      The Trust  reserves  the right to defer  crediting,  sending or wiring
      redemption  proceeds for up to 7 days
     after  receiving the  redemption  order if, in its judgment,  an earlier
      payment could  adversely  affect the
     Portfolio.
      If you are redeeming recently  purchased shares,  your redemption request
      may not be honored until your check
     or electronic transaction has cleared. This may delay your transaction for
     up to 15 days.
     Institutions  are responsible for  transmitting  redemption  orders to the
     Transfer Agent and crediting their
     Customers' accounts with redemption proceeds on a timely basis.
      Redemption  requests by mail must be signed by a person  authorized by
      acceptable  documentation on file with
     the Transfer Agent.
      The Trust reserves the right to redeem shares held by any  shareholder
      who provides  incorrect or incomplete
     account  information or when such involuntary redemptions are necessary to
     avoid adverse  consequences to the
     Trust and its shareholders.
      The Trust may  require  any  information  reasonably  necessary to ensure
      that a  redemption  has been duly
     authorized.
      The Trust reserves the right to change or discontinue any of its
      redemption procedures.

     Exchange  Privileges.  Institutions  and  their  Customers  (to the  extent
permitted by their account  agreements) may exchange shares of the Portfolio for
the same class of shares of another Portfolio. The registration of both accounts
involved must be identical.  A $1,000 minimum investment applies. An exchange is
a redemption  of shares of one  Portfolio  and the purchase of shares of another
Portfolio. It is considered a taxable event and may result in a gain or loss.

     The  Trust  reserves  the  right to  change  or  discontinue  the  exchange
privilege at any time upon 60 days written notice to shareholders  and to reject
any exchange  request.  Exchanges are only available in states where an exchange
can legally be made.  Before  making an exchange you should read the  prospectus
for the shares you are acquiring.

     Telephone  Transactions.  For your  protection,  telephone  requests may be
recorded in order to verify their accuracy. In addition,  the Transfer Agent has
adopted  procedures  in an effort to  establish  reasonable  safeguards  against
fraudulent  telephone  transactions.  If reasonable measures are taken to verify
that telephone  instructions  are genuine,  the Trust and its service  providers
will not be responsible  for any loss resulting from  fraudulent or unauthorized
instructions received over the telephone.  In these circumstances,  shareholders
will bear the risk of loss.  During periods of unusual market activity,  you may
have trouble  placing a request by telephone.  In this event,  consider  sending
your request in writing.

     The proceeds of  redemption  orders  received by telephone  will be sent by
check,  wire or transfer  according to proper  instructions.  All checks will be
made payable to the  shareholder of record and mailed only to the  shareholder's
address of record.

The Trust reserves the right to refuse a telephone redemption.

     Making Changes to Your Account Information.  You may make changes to wiring
instructions,  address of record, or other account  information only in writing.
These  instructions  must be  accompanied by a certified  corporate  resolution,
signature  guarantee  from an  institution  participating  in the Stock Transfer
Agency Medallion Program ("STAMP"),  or other acceptable  evidence of authority.
In accordance  with SEC  regulations,  the Trust and Transfer Agent may charge a
shareholder reasonable costs in locating a shareholder's current address.

     Business Day. A "Business  Day" is each Monday  through Friday when the New
York Stock Exchange (the "Exchange") is open for business. A "Business Day" does
not include a holiday  observed  by the  Exchange.  In 1999 these days are:  New
Year's Day, Martin Luther King, Jr. Day, Presidents' Day, Good Friday,  Memorial
Day, Independence Day, Labor Day, Thanksgiving and Christmas Day.

     Early  Closings.  The Portfolio  reserves the right to cease, or to advance
the time  for,  accepting  purchase,  redemption  or  exchange  orders  for same
Business Day credit when  Northern or the  Exchange  closes early as a result of
unusual weather or other  conditions.  It also reserves this right when The Bond
Market Association recommends that securities markets close or close early.

     Authorized  Intermediaries.  The  Trust  may  authorize  certain  financial
intermediaries  (including  banks,  trust  companies,   brokers  and  investment
advisers),  which provide  recordkeeping,  reporting and processing services, to
accept  purchase,  redemption and exchange orders from their Customers on behalf
of the  Trust.  They may also  designate  other  intermediaries  to accept  such
orders, if approved by the Trust. Authorized  intermediaries are responsible for
transmitting  orders and delivering  funds on a timely basis. The Portfolio will
be deemed to have received an order when the order is accepted by the authorized
intermediary  on a Business Day, and the order will be priced at the Portfolio's
per share NAV next determined.

     Servicing  Agents.  Certain  Institutions  may  perform (or arrange to have
performed)  various  administrative  support  services for Customers who are the
beneficial  owners  of Class C or D shares  through  agreements  with the  Trust
("Servicing   Agents").   These  agreements  are  permitted  under  the  Trust's
Shareholder  Servicing  Plan.  The  level of  support  services  required  by an
Institution  and its Customers  generally will  determine  whether they purchase
Class A, C or D shares.

Administrative support services may include:

      processing purchase and redemption requests from investors;
      placing net purchase and redemption orders with the Transfer Agent;
      providing necessary personnel and facilities to establish and maintain
     investor accounts and records; and
      providing information periodically to investors showing their positions
      in Portfolio shares.

     Servicing  Agents will receive fees from the Portfolio for such services at
an annual rate of up to 0.15% and 0.25% of the average  daily net asset value of
Class C and Class D shares,  respectively.  These fees will be borne exclusively
by the beneficial owners of Class C and D shares.  Please note that Northern may
also provide compensation to certain dealers and other financial  intermediaries
who  provide  services  to their  Customers  who  invest  in the  Trust or whose
Customers purchase  significant amounts of the Portfolio's shares. The amount of
such  compensation  may be made on a one-time  and/or  periodic  basis,  and may
represent  all or a portion of the annual fees earned by Northern as  Investment
Adviser  (after  adjustments).  This  additional  compensation  will  be paid by
Northern or its affiliates  and will not represent an additional  expense to the
Trust or its shareholders.

     Customers  purchasing  shares  through  an  Institution  should  read their
account  agreements  carefully.  An  Institution's  requirements may differ from
those listed in this Prospectus. An Institution may also impose account charges,
such as asset allocation fees, account  maintenance fees, and other charges that
will reduce the net return on an investment in the Portfolio.  If a Customer has
agreed with a  particular  Institution  to maintain a minimum  balance  with the
Institution  and the  balance  falls below this  minimum,  the  Customer  may be
required to redeem all or a part of his investment in the Portfolio.

     Conflict of interest  restrictions may apply to the receipt of compensation
paid by the Trust to a Servicing  Agent in  connection  with the  investment  of
fiduciary funds in Portfolio shares.  Banks and other institutions  regulated by
the Office of  Comptroller  of the  Currency,  Board of Governors of the Federal
Reserve System and state banking commissions,  and investment advisers and other
money managers  subject to the  jurisdiction of the SEC, the Department of Labor
or state  securities  commissions,  are urged to consult  legal  counsel  before
entering into servicing agreements.

     State securities laws regarding the registration of dealers may differ from
Federal law. As a result,  Institutions  investing in the Portfolio on behalf of
their Customers may be required to register as dealers.

Dividends and Distributions

     Dividends and capital gain distributions of the Portfolio are automatically
reinvested  in additional  shares of the  Portfolio  without any sales charge or
additional purchase price amount.

     You may, however, elect to have dividends or capital gain distributions (or
both)  paid in cash or  reinvested  in the  same  class  of  shares  of  another
Portfolio  at their net asset  value per  share.  If you would  like to  receive
dividends or distributions in cash or have them reinvested in another Portfolio,
you must  notify the  Transfer  Agent in  writing  at least two days  before the
dividend or distribution  record date.  Dividends and  distributions may only be
reinvested in the Portfolio in which you maintain an account.

     The Portfolio  will declare and pay dividends  and capital  gains,  if any,
annually.  The  Portfolio  may,  in some years,  make  additional  dividends  or
distributions to the extent necessary for it to avoid incurring  unnecessary tax
liabilities.

TAX CONSIDERATIONS

     The  Portfolio  intends to qualify as a  regulated  investment  company for
Federal tax purposes, and to distribute to shareholders substantially all of its
net  investment  income and net capital  gain.  The  Portfolio's  dividends  and
distributions  will be taxable to you for  Federal,  state and local  income tax
purposes, unless you have a tax-advantaged account.  Dividends and distributions
are taxable whether they are received in cash or reinvested in Portfolio shares.
In general,  distributions  attributable to interest,  dividend, certain foreign
exchange gain and short-term capital gain income of the Portfolio are taxable to
you as ordinary income. Distributions attributable to long-term capital gains of
the  Portfolio are generally  taxable to you as capital  gains.  This is true no
matter how long you own your shares.

     There are certain tax requirements  that the Portfolio must follow in order
to avoid Federal taxation.  In its efforts to adhere to these requirements,  the
Portfolio  may  have  to  limit  its  investment   activity  in  some  types  of
instruments.

     A portion  of the  dividends  paid by the  Portfolio  may  qualify  for the
dividends-received deduction for corporations.

     The sale of Portfolio shares is a taxable event on which a gain or loss may
be recognized.  For tax purposes,  an exchange is considered the same as a sale.
The amount of gain or loss is based on the difference  between your tax basis in
the  Portfolio  shares  and the amount you  receive  for them upon  disposition.
Generally,  you will recognize a long-term capital gain or loss if you have held
your  Portfolio  shares for over twelve  months at the time you sell or exchange
them.  Shares held six months or less may also generate a long-term capital loss
to the extent of any capital  gains  distributions  received on the shares while
they                were                held               by               you.
_______________________________________________________________________________

TIMING

     Dividends and distributions from the Portfolio will generally be taxable to
you in the tax year in which they are paid,  with one  exception.  Dividends and
distributions  declared by the  Portfolio  in October,  November or December and
paid in January are taxed as though they were paid by December 31.

     Every year,  the Trust will send you  information  detailing  the amount of
ordinary  income and capital gains  distributed to your account for the previous
year.

________________________________________________________________________________

TAX EFFECT
OF "BUYING
A DIVIDEND"

     The Portfolio's share price may, at any time, reflect undistributed capital
gains or income and unrealized appreciation. When these amounts are distributed,
they will be taxable to you. For this reason,  you should be especially  mindful
that if you buy  shares on or just  before  the  record  date of a  dividend  or
capital gains distribution,  you will pay the full price for the shares and then
receive  back a portion  of the money  you have just  invested  in the form of a
taxable dividend or capital gain.

     Your investment in the Portfolio  could have  additional tax  consequences.
You should  consult your tax  professional  for  information  regarding  all tax
consequences  applicable  to  your  investments  in  the  Portfolio.   More  tax
information is provided in the Statement of Additional  Information.  This short
summary  is  not   intended  as  a   substitute   for   careful  tax   planning.
________________________________________________________________________________

Year 2000 Issues

     Like  every  other  business   dependent  upon   computerized   information
processing,  Northern Trust Corporation  ("Northern Trust") must deal with "Year
2000" issues.

     Many computer systems use two digits rather than four to identify the year.
Unless adapted,  these systems may not be able to correctly distinguish the Year
2000 from the Year 1900. As the Year 2000 approaches, many systems may be unable
to  accurately  process  certain  date-based  information,  which  could cause a
variety  of  operational  problems  for  businesses.  This could have a negative
effect on the  companies in which the Portfolio  invests,  thus  decreasing  the
Portfolio's investment returns.

     Northern  Trust has  implemented  steps to prepare  its  critical  computer
systems and processes for Year 2000  processing.  It has established a dedicated
Year 2000 Project Team whose members have  significant  systems  development and
maintenance   experience.   Northern   Trust's  Year  2000  project  includes  a
comprehensive  testing plan of its critical systems.  Northern Trust has advised
the Trust that it has  substantially  completed work on its critical systems and
that testing with outside parties will be conducted during 1999.

     Northern  Trust  also has a program to  monitor  and assess the  efforts of
other parties,  such as other service  providers to the Portfolio.  However,  it
cannot control the success of those other parties'  efforts.  Contingency  plans
are being  established to provide Northern Trust with alternatives in case these
entities  experience  significant  Year 2000  difficulties  that impact Northern
Trust.

     Furthermore,  even if the actions taken by Northern  Trust are  successful,
the  normal  operations  of the  Portfolio  may,  in  any  event,  be  disrupted
significantly  by the failure of  communications  and public utility  companies,
governmental entities,  financial processors or others to perform their services
as a result of Year 2000 problems.

                                    APPENDIX

                   ADDITIONAL INFORMATION ON PORTFOLIO RISKS,
                            SECURITIES AND TECHNIQUES

     This  Appendix  takes a closer look at some of the risks that are presented
by the types of securities  in which the Portfolio may invest.  It also explores
the various investment  techniques that the investment  management team may, but
is not required to, use. The  Portfolio may invest in other  securities  and are
subject to further  restrictions  and risks which are described in the Statement
of  Additional  Information.  You should  note that the  Portfolio's  investment
objective  may be changed by the Trust's Board of Trustees  without  shareholder
approval.  Shareholders  will,  however,  be notified of any  changes.  Any such
change may result in the Portfolio having an investment objective different from
the  objective  which  the  shareholder  considered  appropriate  at the time of
investment in the Portfolio.

SPECIAL RISKS AND OTHER CONSIDERATIONS

     DERIVATIVE   RISK.   The  Portfolio  may  purchase   certain   "derivative"
instruments.  A  derivative  is a  financial  instrument  whose value is derived
from---or  based  upon---the  performance  of  underlying  assets,  interest  or
currency  exchange rates or indices.  Many types of  instruments  representing a
wide range of potential  risks and rewards are  derivatives,  including  futures
contracts,  options,  equity  swaps,  structured  securities,  forward  currency
contracts and structured debt  obligations  (including  collateralized  mortgage
obligations and other types of asset-backed  securities,  "stripped"  securities
and various floating rate instruments, including inverse floaters).

          INVESTMENT STRATEGY.  The Portfolio will invest in derivatives only if
          the potential  risks and rewards are consistent  with the  Portfolio's
          objective,  strategies and overall risk profile. The Portfolio may use
          derivatives  for hedging  purposes  to offset a potential  loss in one
          position by  establishing  an interest  in an opposite  position.  The
          Portfolio may also use derivatives for speculative  purposes to invest
          for potential income or capital gain.

          SPECIAL RISKS.  Engaging in derivative  transactions  involves special
          risks,  including  (a) market  risk that the  Portfolio's  derivatives
          position will lose value; (b) credit risk that the counterparty to the
          transaction  will default;  (c) leveraging  risk that the value of the
          derivative  instrument  will decline more than the value of the assets
          on which it is based;  (d) illiquidity risk that the Portfolio will be
          unable  to sell  its  position  because  of lack of  market  depth  or
          disruption; (e) pricing risk that the value of a derivative instrument
          will be difficult to determine; and (f) operations risk that loss will
          occur as a result of inadequate  systems or human error. Many types of
          derivatives have been recently developed and have not been tested over
          complete market cycles. For these reasons,  the Portfolio may suffer a
          loss whether or not the analysis of the investment  management team is
          accurate.

     FOREIGN  INVESTMENT RISK.  Foreign securities include direct investments in
non-U.S.  dollar-denominated  securities traded outside of the United States and
dollar-denominated  securities  of  foreign  issuers.  Foreign  securities  also
include indirect  investments  such as American  Depository  Receipts  ("ADRs"),
European  Depository  Receipts ("EDRs") and Global Depository Receipts ("GDRs").
ADRs are U.S.  dollar-denominated  receipts representing shares of foreign-based
corporations.  ADRs are issued by U.S. banks or trust companies, and entitle the
holder to all dividends  and capital  gains that are paid out on the  underlying
foreign  shares.  EDRs  and GDRs  are  receipts  issued  by  non-U.S.  financial
institutions that often trade on foreign exchanges.  They represent ownership in
an  underlying  foreign or U.S.  security  and are  generally  denominated  in a
foreign currency.

          INVESTMENT  STRATEGY.  The Portfolio may invest up to 25% of its total
          assets in foreign securities, including ADRs, EDRs and GDRs.

          SPECIAL RISKS.  Foreign  securities  involve  special risks and costs.
          Foreign  securities,  and in particular  foreign debt securities,  are
          sensitive to changes in interest rates. In addition, investment in the
          securities  of  foreign  governments  involves  the risk that  foreign
          governments  may default on their  obligations  or may  otherwise  not
          respect the integrity of their debt. The performance of investments in
          securities  denominated  in a foreign  currency  will also depend,  in
          part, on the strength of the foreign  currency against the U.S. dollar
          and the interest rate environment in the country issuing the currency.
          Absent  other  events  which  could  otherwise  affect  the value of a
          foreign  security  (such as a change in the  political  climate  or an
          issuer's  credit  quality),  appreciation  in the value of the foreign
          currency  generally  results  in an  increase  in value  of a  foreign
          currency-denominated  security in terms of U.S. dollars.  A decline in
          the  value  of  the  foreign  currency  relative  to the  U.S.  dollar
          generally   results   in  a   decrease   in   value   of   a   foreign
          currency-denominated security.

          Investment  in  foreign  securities  may  involve  higher  costs  than
          investment  in  U.S.  securities,  including  higher  transaction  and
          custody costs as well as the imposition of additional taxes by foreign
          governments.  Foreign  investments  may also involve risks  associated
          with the level of currency  exchange  rates,  less complete  financial
          information  about the  issuers,  less market  liquidity,  more market
          volatility and political  instability.  Future  political and economic
          developments, the possible imposition of withholding taxes on dividend
          income,  the possible seizure or  nationalization of foreign holdings,
          the  possible  establishment  of  exchange  controls or freezes on the
          convertibility  of  currency,  or the  adoption of other  governmental
          restrictions   might   adversely   affect  an  investment  in  foreign
          securities.  Additionally,  foreign  banks  and  foreign  branches  of
          domestic banks may be subject to less stringent reserve  requirements,
          and to different accounting, auditing and recordkeeping requirements.

          Additional  risks  are  involved  when  investing  in  countries  with
          emerging economies or securities markets.  These countries are located
          in the Asia/Pacific  region,  Eastern Europe,  Latin and South America
          and Africa. In general,  the securities markets of these countries are
          less liquid,  are subject to greater  price  volatility,  have smaller
          market capitalizations and have problems with securities  registration
          and custody. In addition, because the securities settlement procedures
          are less developed in these  countries,  the Portfolio may be required
          to  deliver  securities  receiving  payment  and may also be unable to
          complete transactions during market disruptions.  As a result of these
          and other risks,  investments in these countries  generally  present a
          greater risk of loss to the Portfolio.

          While the Portfolio's investments may, as permitted, be denominated in
          foreign currencies,  the portfolio securities and other assets held by
          the Portfolio are valued in U.S. dollars.  Currency exchange rates may
          fluctuate  significantly  over  short  periods  of  time  causing  the
          Portfolio's  net asset value to fluctuate as well.  Currency  exchange
          rates can be affected unpredictably by the intervention or the failure
          to intervene by U.S. or foreign  governments or central  banks,  or by
          currency controls or political  developments in the U.S. or abroad. To
          the extent that the Portfolio is invested in foreign  securities while
          also  maintaining  currency  positions,  it may be  exposed to greater
          combined risk. The Portfolio's net currency positions may expose it to
          risks independent of its securities positions.

          The  introduction of a single  currency,  the euro, on January 1, 1999
          for participating  nations in the European Economic and Monetary Union
          presents  unique  uncertainties,  including  the  legal  treatment  of
          certain  outstanding  financial  contracts  after January 1, 1999 that
          refer to existing  currencies  rather than the euro; the establishment
          and maintenance of exchange rates for currencies  being converted into
          the euro; the fluctuation of the euro relative to non-euro  currencies
          during the transition period from January 1, 1999 to December 31, 2001
          and  beyond;  whether  the  interest  rate,  tax and labor  regimes of
          European countries  participating in the euro will converge over time;
          and whether the conversion of the currencies of other countries in the
          European Union ("EU"),  such as the United  Kingdom and Denmark,  into
          the euro and the admission of other non-EU  countries  such as Poland,
          Latvia  and  Lithuania  as members of the EU may have an impact on the
          euro. These or other factors,  including political and economic risks,
          could cause market  disruptions,  and could adversely affect the value
          of securities held by the Portfolio.

INVESTMENT GRADE CREDIT RISK: A security is considered investment grade if, at
the time of purchase, it is rated:

        BBB or higher by S&P;
        Baa or higher by Moody's;
        BBB or higher by Duff; or
        BBB or higher by Fitch.

     A security  will be considered  investment  grade if it receives one of the
above   ratings,   even  if  it  receives  a  lower  rating  from  other  rating
organizations.

          INVESTMENT  STRATEGY.   Except  as  stated  below,  fixed  income  and
          convertible  securities  purchased by the Portfolio  will generally be
          rated  investment  grade.  The  Portfolio  may also  invest in unrated
          securities if the Investment  Adviser  believes they are comparable in
          quality.

          SPECIAL RISKS.  Although  securities  rated BBB by Standard and Poor's
          Rating  Services  ("S&P"),  Duff & Phelps Credit Rating Co.  ("Duff"),
          Fitch IBCA Inc. ("Fitch"),  or Baa by Moody's Investors Service,  Inc.
          ("Moody's")  are  considered   investment  grade,  they  have  certain
          speculative  characteristics.  Therefore,  they  may be  subject  to a
          higher  risk  of  default  than   obligations   with  higher  ratings.
          Subsequent  to its  purchase by the  Portfolio,  a rated  security may
          cease to be rated or its  rating  may be  reduced  below  the  minimum
          rating required for purchase by the Portfolio.  The Investment Adviser
          will  consider  such an event in  determining  whether  the  Portfolio
          should continue to hold the security.

     NON-INVESTMENT  GRADE  CREDIT RISK.  Non-investment  grade fixed income and
convertible securities are generally rated BB or below by S&P, Duff or Fitch, or
Ba by Moody's.

          INVESTMENT  STRATEGY.  The Portfolio may invest up to 15% of its total
          assets  in   non-investment   grade  securities  when  the  investment
          management team determines that such securities are desirable in light
          of the  Portfolio's  investment  objective  and  portfolio  mix.  Such
          securities  may be  purchased as long as they are rated B or higher at
          the time of  purchase  by at least  one  major  rating  agency  (or if
          unrated,   they  are  of  comparable  quality  as  determined  by  the
          Investment Adviser).

          SPECIAL RISKS.  Non-investment grade securities (sometimes referred to
          as "junk  bonds") are subject to greater  risk than  investment  grade
          securities. The market value of these low-rated securities tends to be
          more  sensitive to individual  corporate  developments  and changes in
          interest rates and economic  conditions than higher-rated  securities.
          In addition,  they  generally  present a higher degree of credit risk.
          Issuers of low-rated  securities are often highly leveraged,  so their
          ability to repay their debt during an economic  downturn or periods of
          rising interest rates may be impaired. The risk of loss due to default
          by  these  issuers  is  also  greater  because  low-rated   securities
          generally  are  unsecured  and are  generally  less liquid than higher
          quality securities.  If an issuer defaulted, the Portfolio could incur
          additional expenses seeking recovery of its investment.

     PORTFOLIO  TURNOVER RISK. The investment  management team will not consider
the Portfolio turnover rate a limiting factor in making investment decisions for
the  Portfolio.   A  high  portfolio  turnover  rate  (100%  or  more)  involves
correspondingly  greater  expenses  which must be borne by the Portfolio and its
shareholders.  It may also result in higher  short-term  capital  gains that are
taxable to shareholders.  The Trust expects that the annual turnover rate of the
Portfolio will generally not exceed 400%.

     SMALL COMPANY STOCK RISKS.  Investments in small  capitalization  companies
involve greater risk and portfolio price  volatility than  investments in larger
capitalization  stocks.  Among the reasons for the greater  price  volatility of
these investments are the less certain growth prospects of smaller firms and the
lower  degree  of  liquidity   in  the  markets  for  such   securities.   Small
capitalization  companies  may be  thinly  traded  and may  have to be sold at a
discount from current market prices or in small lots over an extended  period of
time.  Because of the lack of  sufficient  market  liquidity,  the Portfolio may
incur losses  because it will be required to effect  sales at a  disadvantageous
time and only then at a substantial dip in price. Small capitalization companies
include "unseasoned" issuers that do not have an established  financial history;
often have limited product lines, markets or financial resources;  may depend on
or use a few key personnel for management;  and may be susceptible to losses and
risks of bankruptcy.  Transaction  costs for these  investments are often higher
than   those  of  larger   capitalization   companies.   Investments   in  small
capitalization  companies may be more  difficult to price  precisely  than other
types of securities because of their characteristics and lower trading volumes.

     TEMPORARY INVESTMENT RISK. Short-term  obligations refer to U.S. government
securities,  high-quality money market instruments  (including  commercial paper
and  obligations of foreign and domestic banks such as  certificates of deposit,
bank and  deposit  notes,  bankers'  acceptances  and fixed time  deposits)  and
repurchase  agreements  with maturities of 13 months or less.  Generally,  these
obligations are purchased to provide stability and liquidity to the Portfolio.

          INVESTMENT  STRATEGY.  The  Portfolio may invest all or any portion of
          its  assets in  short-term  obligations  pending  investment,  to meet
          anticipated redemption requests or as a temporary defensive measure in
          response to adverse market or economic conditions.

          SPECIAL RISKS. The Portfolio may not achieve its investment  objective
          when its assets are invested in short-term obligations.

ADDITIONAL DESCRIPTION OF SECURITIES AND COMMON INVESTMENT TECHNIQUES.

     ASSET-BACKED SECURITIES.  Asset-backed securities are sponsored by entities
such as  government  agencies,  banks,  financial  companies  and  commercial or
industrial  companies.  They represent  interests in pools of mortgages or other
cash-flow producing assets such as automobile loans, credit card receivables and
other financial assets.  In effect,  these securities "pass through" the monthly
payments that  individual  borrowers make on their mortgages or other assets net
of any fees paid to the issuers.  Examples of these include guaranteed  mortgage
pass-through certificates, collateralized mortgage obligations ("CMOs") and real
estate mortgage investment conduits ("REMICs").

          INVESTMENT  STRATEGY.  The  Portfolio  may purchase  various  types of
          asset-backed  securities.  The Portfolio  will invest in  asset-backed
          securities rated investment grade (rated "BBB" or better by S&P, Duff,
          Fitch or  Moody's) at the time of  purchase.  The  Portfolio  may also
          invest in  unrated  mortgage-backed  securities  which the  Investment
          Adviser believes are of comparable quality.

          SPECIAL  RISKS.  In addition to credit and market  risk,  asset-backed
          securities  involve  prepayment  risk  because the  underlying  assets
          (loans) may be prepaid at any time. The value of these  securities may
          also   change   because  of  actual  or   perceived   changes  in  the
          creditworthiness of the originator, the servicing agent, the financial
          institution  providing the credit  support or the  counterparty.  Like
          other fixed income securities,  when interest rates rise, the value of
          an  asset-backed  security  generally  will  decline.   However,  when
          interest rates  decline,  the value of an  asset-backed  security with
          prepayment  features  may not  increase as much as that of other fixed
          income securities.  In addition,  non-mortgage asset-backed securities
          involve  certain  risks not presented by  mortgage-backed  securities.
          Primarily,  these  securities  do not  have  the  benefit  of the same
          security   interest  in  the   underlying   collateral.   Credit  card
          receivables are generally  unsecured,  and the debtors are entitled to
          the protection of a number of state and Federal  consumer credit laws.
          Automobile  receivables  are  subject to the risk that the trustee for
          the holders of the  automobile  receivables  may not have an effective
          security interest in all of the obligations backing the receivables.

     BORROWINGS  AND REVERSE  REPURCHASE  AGREEMENTS.  The  Portfolio can borrow
money from banks and enter into  reverse  repurchase  agreements  with banks and
other financial institutions.  Reverse repurchase agreements involve the sale of
securities  held  by the  Portfolio  subject  to the  Portfolio's  agreement  to
repurchase them at a mutually agreed upon date and price (including interest).

          INVESTMENT STRATEGY. The Portfolio may borrow in amounts not exceeding
          one-third of its total assets (including the amount  borrowed).  These
          transactions may be entered into as a temporary  measure for emergency
          purposes or to meet  redemption  requests.  The  Portfolio may utilize
          reverse  repurchase  agreements  when the investment  management  team
          expects that the interest  income to be earned from the  investment of
          the  transaction  proceeds  will be greater than the related  interest
          expense. The Portfolio's reverse repurchase agreements,  together with
          any other borrowings,  will not exceed,  in the aggregate,  33 1/3% of
          the value of its total assets. In addition, whenever borrowings exceed
          5% of the  Portfolio's  total assets,  the Portfolio will not make any
          investments.

          SPECIAL RISKS.  Borrowings and reverse  repurchase  agreements involve
          leveraging.  If the securities held by the Portfolio  decline in value
          while these  transactions are outstanding,  the net asset value of the
          Portfolio's    outstanding   shares   will   decline   in   value   by
          proportionately  more than the decline in value of the securities.  In
          addition,  reverse  repurchase  agreements  involve the risks that the
          interest  income earned by the Portfolio  (from the  investment of the
          proceeds) will be less than the interest  expense of the  transaction,
          that the market value of the  securities  sold by the  Portfolio  will
          decline  below  the  price  the  Portfolio  is  obligated  to  pay  to
          repurchase the securities, and that the securities may not be returned
          to the Portfolio.

     CONVERTIBLE SECURITIES. A convertible security is a bond or preferred stock
that may be converted  (exchanged)  into the common stock of the issuing company
within a specified time period for a specified number of shares.  They offer the
Portfolio a way to participate in the capital  appreciation  of the common stock
into which the securities are  convertible,  while earning higher current income
than is available from the common stock.

          INVESTMENT STRATEGY. The Portfolio may acquire convertible securities.
          These securities are subject to the same rating  requirements as fixed
          income securities held by the Portfolio.

     EQUITY  SWAPS.  Equity  swaps  allow the parties to the swap  agreement  to
exchange components of return on one equity investment (e.g., a basket of equity
securities  or an index)  for a  component  of return on another  non-equity  or
equity investment, including an exchange of differential rates of return.

          INVESTMENT STRATEGY.  The Portfolio may invest in equity swaps. Equity
          swaps  may be used to  invest  in a market  without  owning  or taking
          physical   custody  of  securities  in   circumstances   where  direct
          investment  may  be  restricted  for  legal  reasons  or is  otherwise
          impractical. Equity swaps may also be used for other purposes, such as
          hedging or seeking to increase total return.

          SPECIAL  RISKS.  Equity  swaps are  derivative  instruments  and their
          values  can be  very  volatile.  To the  extent  that  the  investment
          management team does not accurately  analyze and predict the potential
          relative  fluctuation on the components  swapped with the other party,
          the  Portfolio may suffer a loss.  The value of some  components of an
          equity  swap  (such as the  dividends  on a common  stock) may also be
          sensitive to changes in interest rates. Furthermore, during the period
          a swap  is  outstanding,  the  Portfolio  may  suffer  a  loss  if the
          counterparty defaults.

     FORWARD CURRENCY EXCHANGE  CONTRACTS.  A forward currency exchange contract
is an  obligation  to exchange  one  currency  for another on a future date at a
specified exchange rate.

          INVESTMENT  STRATEGY.  The Portfolio  may enter into forward  currency
          exchange  contracts for hedging  purposes and to help reduce the risks
          and volatility  caused by changes in foreign currency  exchange rates.
          Foreign currency exchange  contracts will be used at the discretion of
          the investment  management  team, and the Portfolio is not required to
          hedge its foreign currency positions.

          SPECIAL  RISKS.  Forward  foreign  currency  contracts  are  privately
          negotiated transactions, and can have substantial price volatility. As
          a result,  they offer  less  protection  against  default by the other
          party than is available for  instruments  traded on an exchange.  When
          used for hedging purposes,  they tend to limit any potential gain that
          may be  realized  if the  value of the  Portfolio's  foreign  holdings
          increases because of currency fluctuations.  When used for speculative
          purposes, forward currency exchange contracts may result in additional
          losses that would not otherwise be incurred.

     FUTURES  CONTRACTS  AND RELATED  OPTIONS.  A futures  contract is a type of
derivative  instrument  that obligates the holder to buy or sell an asset in the
future at an agreed upon price. For example, a futures contract may obligate the
Portfolio,  at maturity, to take or make delivery of certain domestic or foreign
securities,  the cash  value of a  securities  index or a stated  quantity  of a
foreign currency.  When the Portfolio purchases an option on a futures contract,
it has the  right to assume a  position  as a  purchaser  or seller of a futures
contract  at a  specified  exercise  price  during the option  period.  When the
Portfolio  sells an  option on a  futures  contract,  it  becomes  obligated  to
purchase or sell a futures contract if the option is exercised.

          INVESTMENT  STRATEGY.  To the extent  consistent  with its  investment
          objective,  the Portfolio may invest in futures  contracts and options
          on futures  contacts  on domestic  or foreign  exchanges  or boards of
          trade. They may be used for hedging purposes, to increase total return
          or to maintain  liquidity to meet potential  shareholder  redemptions,
          invest cash balances or dividends or minimize trading costs.

          The value of the Portfolio's  futures contacts may equal up to 100% of
          its total assets.  However,  the Portfolio will not purchase or sell a
          futures  contract  unless,  after  the  transaction,  the  sum  of the
          aggregate amount of margin deposits on its existing futures  positions
          and  the  amount  of  premiums  paid  for  related  options  used  for
          non-hedging purposes is 5% or less of its total assets.

          SPECIAL  RISKS.  Futures  contracts and options  present the following
          risks: imperfect correlation between the change in market value of the
          Portfolio's securities and the price of futures contracts and options;
          the  possible  inability  to close a futures  contract  when  desired;
          losses due to  unanticipated  market  movements  which are potentially
          unlimited;  and the possible  inability of the  investment  management
          team to correctly predict the direction of securities prices, interest
          rates,  currency  exchange rates and other economic  factors.  Foreign
          exchanges  or  boards  of  trade  generally  do  not  offer  the  same
          protections as U.S. exchanges.

     ILLIQUID OR RESTRICTED  SECURITIES.  Illiquid securities include repurchase
agreements  and time deposits with  notice/termination  dates of more than seven
days,  certain  variable amount master demand notes that cannot be called within
seven days, certain insurance funding  agreements (see below),  certain unlisted
over-the-counter  options and other  securities  that are traded in the U.S. but
are subject to trading  restrictions  because they are not registered  under the
Securities Act of 1933, as amended (the "1933 Act").

          INVESTMENT  STRATEGY.  The  Portfolio  may invest up to 15% of its net
          assets in securities that are illiquid.  If otherwise  consistent with
          its  investment  objective  and  policies,  the Portfolio may purchase
          commercial  paper issued  pursuant to Section 4(2) of the 1933 Act and
          domestically  traded securities that are not registered under the 1933
          Act but can be sold to "qualified  institutional buyers" in accordance
          with Rule 144A  under the 1933 Act  ("Rule  144A  Securities").  These
          securities  will not be considered  illiquid so long as the Investment
          Adviser determines,  under guidelines approved by the Trust's Board of
          Trustees, that an adequate trading market exists.

          SPECIAL  RISKS.  Because  illiquid and  restricted  securities  may be
          difficult  to sell at an  acceptable  price,  they may be  subject  to
          greater  volatility  and may  result in a loss to the  Portfolio.  The
          practice of investing in Rule 144A Securities could increase the level
          of the  Portfolio's  illiquidity  during  any  period  that  qualified
          institutional   buyers  become   uninterested   in  purchasing   these
          securities.

     INSURANCE FUNDING AGREEMENTS.  An insurance funding agreement ("IFA") is an
agreement  that requires the Portfolio to make cash  contributions  to a deposit
fund of an insurance  company's  general  account.  The  insurance  company then
credits interest to the Portfolio for a set time period.

          INVESTMENT  STRATEGY.  The  Portfolio  may  invest  in IFAs  issued by
          insurance companies that meet quality and credit standards established
          by the Investment Adviser.

          SPECIAL RISKS.  IFAs are not insured by a government  agency--they are
          backed only by the  insurance  company that issues them.  As a result,
          they are subject to default  risk.  In addition,  an active  secondary
          market in IFAs does not  currently  exist.  This  means that it may be
          difficult to sell an IFA at an appropriate price.

     INVESTMENT  COMPANIES.   To  the  extent  consistent  with  its  investment
objective and policies,  the Portfolio may invest in securities  issued by other
investment  companies,  including  money market funds and index funds,  "country
funds"  (i.e.,  funds that  invest  primarily  in issuers  located in a specific
foreign  country or region),  S&P's  Depository  Receipts  ("SPDRs") and similar
securities of other issuers.

          INVESTMENT STRATEGY.  Investments by the Portfolio in other investment
          companies will be subject to the limitations of the 1940 Act.

          SPECIAL RISKS.  As a shareholder of another  investment  company,  the
          Portfolio  would be subject to the same risks as any other investor in
          that company. In addition,  it would bear a proportionate share of any
          fees and expenses paid by that company.  These would be in addition to
          the advisory and other fees paid directly by the Portfolio.

     OPTIONS. An option is a type of derivative instrument that gives the holder
the right (but not the  obligation) to buy (a "call") or sell (a "put") an asset
in the  future at an  agreed  upon  price  prior to the  expiration  date of the
option.

          INVESTMENT  STRATEGY.  To the extent  consistent  with its  investment
          objective,  the Portfolio may write (sell)  covered call options,  buy
          put  options,  buy call  options  and write  secured  put  options for
          hedging purposes or to earn additional  income.  Options may relate to
          particular   securities,   foreign  or  domestic  securities  indices,
          financial  instruments and foreign currencies.  The Portfolio will not
          purchase  put and call options in an amount that exceeds 5% of its net
          assets at the time of  purchase.  The total  value of the  Portfolio's
          assets subject to options written by the Portfolio will not be greater
          than 25% of its net  assets  at the time the  option is  written.  The
          Portfolio may "cover" a call option by owning the security  underlying
          the  option  or  through  other  means.  Put  options  written  by the
          Portfolio are "secured" if the Portfolio  maintains liquid assets in a
          segregated  account in an amount at least equal to the exercise  price
          of the option up until the expiration date.

          SPECIAL RISKS.  Options trading is a highly specialized  activity that
          involves   investment   techniques  and  risks  different  from  those
          associated with ordinary Portfolio securities transactions.  The value
          of options can be highly volatile, and their use can result in loss if
          the  investment  management  team is incorrect in its  expectation  of
          price fluctuations. The successful use of options for hedging purposes
          also depends in part on the ability of the investment  management team
          to predict  future price  fluctuations  and the degree of  correlation
          between the options and securities markets.

          The  Portfolio  will  invest  and trade in  unlisted  over-the-counter
          options only with firms deemed creditworthy by the Investment Adviser.
          However,  unlisted options are not subject to the protections afforded
          purchasers  of listed  options by the  Options  Clearing  Corporation,
          which  performs the  obligations  of its members which fail to perform
          them in connection with the purchase or sale of options.

     REAL ESTATE INVESTMENT TRUSTS (REITS). REITs are pooled investment vehicles
that invest primarily in either real estate or real estate related loans.

          INVESTMENT STRATEGY. The Portfolio may invest in REITs.

          SPECIAL RISKS. The value of a REIT is affected by changes in the value
          of the properties owned by the REIT or securing mortgage loans held by
          the REIT. REITs are dependent upon cash flow from their investments to
          repay financing  costs and the ability of a REIT's manager.  REITs are
          also subject to risks generally  associated  with  investments in real
          estate. The Portfolio will indirectly bear its proportionate  share of
          any expenses,  including  management  fees, paid by a REIT in which it
          invests.

     REPURCHASE  AGREEMENTS.  Repurchase  agreements  involve  the  purchase  of
securities by the Portfolio subject to the seller's agreement to repurchase them
at a mutually agreed upon date and price.

          INVESTMENT   STRATEGY.   The  Portfolio  may  enter  into   repurchase
          agreements   with   financial   institutions   such   as   banks   and
          broker-dealers  that are deemed to be  creditworthy  by the Investment
          Adviser. Although the securities subject to a repurchase agreement may
          have maturities  exceeding one year,  settlement of the agreement will
          never  occur  more than one year  after  the  Portfolio  acquires  the
          securities.

          SPECIAL RISKS. In the event of a default,  the Portfolio will suffer a
          loss to the extent that the proceeds  from the sale of the  underlying
          securities and other collateral are less than the repurchase price and
          the  Portfolio's  costs  associated  with delay and enforcement of the
          repurchase  agreement.  In addition,  in the event of bankruptcy,  the
          Portfolio could suffer  additional  losses if a court  determines that
          the Portfolio's interest in the collateral is not enforceable.

     SECURITIES  LENDING.  In order to generate additional income, the Portfolio
may lend  securities on a short-term  basis to banks,  brokers-dealers  or other
qualified institutions. In exchange, the Portfolio will receive collateral equal
to at least 100% of the value of the securities loaned.

          INVESTMENT  STRATEGY.  Securities  lending may  represent no more than
          one-third the value of the  Portfolio's  total assets  (including  the
          loan  collateral).  Any cash  collateral  received by the Portfolio in
          connection  with  these  loans  may be  invested  in  U.S.  government
          securities and other liquid high-grade debt obligations.

          SPECIAL RISKS. The main risk when lending portfolio securities is that
          the borrower might become  insolvent or refuse to honor its obligation
          to  return  the  securities.   In  this  event,  the  Portfolio  could
          experience delays in recovering its securities and may incur a capital
          loss. In addition,  the Portfolio may incur a loss in reinvesting  the
          cash collateral it receives.

     STRUCTURED  SECURITIES.  The value of the  principal of and/or  interest on
such  securities  is determined by reference to changes in the value of specific
currencies,  interest rates, commodities,  indices or other financial indicators
(the "Reference") or the relative change in two or more References. The interest
rate  or the  principal  amount  payable  upon  maturity  or  redemption  may be
increased or decreased depending upon changes in the applicable Reference.

          INVESTMENT STRATEGY. The Portfolio may invest in structured securities
          to the extent consistent with its investment objective.

          SPECIAL  RISKS.  The terms of some  structured  securities may provide
          that in certain  circumstances  no principal  is due at maturity  and,
          therefore,  the Portfolio could suffer a total loss of its investment.
          Structured securities may be positively or negatively indexed, so that
          appreciation  of the  Reference may produce an increase or decrease in
          the interest  rate or value of the security at maturity.  In addition,
          changes in the interest rates or the value of the security at maturity
          may  be  a  multiple  of  changes  in  the  value  of  the  Reference.
          Consequently,  structured  securities  may entail a greater  degree of
          market risk than other types of securities.  Structured securities may
          also be more  volatile,  less liquid and more  difficult to accurately
          price than less complex securities due to their derivative nature.

     UNITED  STATES   GOVERNMENT   OBLIGATIONS.   These  include  U.S.  Treasury
obligations,  such as bills,  notes and bonds,  which  generally  differ only in
terms of their  interest  rates,  maturities  and time of  issuance.  These also
include  obligations issued or guaranteed by the U.S. government or its agencies
and instrumentalities. Securities guaranteed as to principal and interest by the
U.S.  government,  its agencies or  instrumentalities  are deemed to include (a)
securities  for which the  payment of  principal  and  interest  is backed by an
irrevocable  letter of  credit  issued  by the U.S.  government  or an agency or
instrumentality  thereof,  and (b)  participations  in  loans  made  to  foreign
governments or their agencies that are so guaranteed.

          INVESTMENT  STRATEGY.  To the extent  consistent  with its  investment
          objective,  the  Portfolio  may invest in a variety  of U.S.  Treasury
          obligations and also may invest in obligations issued or guaranteed by
          the U.S. government or its agencies and instrumentalities.

          SPECIAL  RISKS.  Not all U.S.  government  obligations  carry the same
          credit  support.  Some,  such  as  those  of the  Government  National
          Mortgage  Association  ("GNMA"),  are  supported by the full faith and
          credit of the United States Treasury. Other obligations, such as those
          of the Federal  Home Loan  Banks,  are  supported  by the right of the
          issuer to borrow from the United States Treasury;  and others, such as
          those issued by the Federal National  Mortgage  Association  ("FNMA"),
          are supported by the discretionary authority of the U.S. government to
          purchase the agency's obligations.  Still others are supported only by
          the credit of the instrumentality.  No assurance can be given that the
          U.S.  government  would provide  financial  support to its agencies or
          instrumentalities  if it is not obligated to do so by law. There is no
          assurance that these  commitments  will be undertaken or complied with
          in  the  future.  In  addition,   the  secondary  market  for  certain
          participations in loans made to foreign  governments or their agencies
          may be limited.

     VARIABLE  AND  FLOATING  RATE  INSTRUMENTS.   Variable  and  floating  rate
instruments  have interest rates that are  periodically  adjusted  either at set
intervals  or that float at a margin  above a generally  recognized  index rate.
These instruments  include long-term variable and floating rate bonds (sometimes
referred to as "Put Bonds") where the Portfolio  obtains at the time of purchase
the  right  to put the  bond  back to the  issuer  or a third  party at par at a
specified date.

          INVESTMENT  STRATEGY.  The  Portfolio  may invest in rated and unrated
          variable and floating rate  instruments to the extent  consistent with
          its investment objective.  Unrated instruments may be purchased by the
          Portfolio if they are  determined by the  Investment  Adviser to be of
          comparable  quality to rated instruments  eligible for purchase by the
          Portfolio.

          SPECIAL RISKS.  Variable and floating rate  instruments are subject to
          the same risks as fixed income investments, particularly interest rate
          and credit risk. The market values of inverse  floaters are subject to
          greater  volatility than other variable and floating rate  instruments
          due to their  higher  degree of leverage.  Because  there is no active
          secondary market for certain  variable and floating rate  instruments,
          they  may be more  difficult  to sell if the  issuer  defaults  on its
          payment  obligations  or  during  periods  when the  Portfolio  is not
          entitled to exercise its demand  rights.  As a result,  the  Portfolio
          could suffer a loss with respect to these instruments.

     WARRANTS.  A warrant  represents  the right to  purchase  a  security  at a
predetermined price for a specified period of time.

          INVESTMENT  STRATEGY.  The  Portfolio  may  invest up to 5% of its net
          assets at the time of  purchase in warrants  and similar  rights.  The
          Portfolio  may also  purchase  bonds  that are  issued in tandem  with
          warrants.

          SPECIAL RISKS. Warrants are derivative  instruments that present risks
          similar to options.

     WHEN-ISSUED   SECURITIES,   DELAYED   DELIVERY   TRANSACTIONS  AND  FORWARD
COMMITMENTS. A purchase of "when-issued" securities refers to a transaction made
conditionally  because the securities,  although  authorized,  have not yet been
issued. A delayed delivery or forward commitment transaction involves a contract
to  purchase  or sell  securities  for a fixed price at a future date beyond the
customary settlement period.

          INVESTMENT STRATEGY.  The Portfolio may purchase or sell securities on
          a when-issued,  delayed delivery or forward commitment basis. Although
          the Portfolio will generally purchase securities in these transactions
          with the  intention of acquiring  the  securities,  the  Portfolio may
          dispose  of such  securities  prior to  settlement  if the  investment
          management team deems it appropriate to do so.

          SPECIAL  RISKS.  Purchasing  securities  on  a  when-issued,   delayed
          delivery or forward  commitment basis involves the risk that the value
          of the securities may decrease by the time they are actually issued or
          delivered.   Conversely,  selling  securities  in  these  transactions
          involves the risk that the value of the securities may increase by the
          time they are actually issued or delivered.  These  transactions  also
          involve the risk that the seller may fail to deliver  the  security or
          cash on the settlement date.

     ZERO  COUPON,   PAY-IN-KIND  AND  CAPITAL  APPRECIATION  BONDS.  These  are
securities  issued at a discount from their face value because interest payments
are  typically  postponed  until  maturity.  Interest  payments  on  pay-in-kind
securities are payable by the delivery of additional  securities.  The amount of
the discount rate varies  depending on factors such as the time remaining  until
maturity,  prevailing  interest  rates, a security's  liquidity and the issuer's
credit quality.  These securities also may take the form of debt securities that
have been stripped of their interest payments.

          INVESTMENT  STRATEGY.   The  Portfolio  may  invest  in  zero  coupon,
          pay-in-kind and capital  appreciation  bonds to the extent  consistent
          with its investment objective.

          SPECIAL  RISKS.  The market  prices of zero  coupon,  pay-in-kind  and
          capital appreciation bonds generally are more volatile than the market
          prices of  interest-bearing  securities and are likely to respond to a
          greater  degree to changes  in  interest  rates than  interest-bearing
          securities   having  similar   maturities  and  credit  quality.   The
          Portfolio's  investments  in  zero  coupon,  pay-in-kind  and  capital
          appreciation  bonds  may  require  the  Portfolio  to sell some of its
          Portfolio  securities to generate  sufficient  cash to satisfy certain
          income distribution requirements.

For More Information

ANNUAL/
SEMIANNUAL
REPORT

     Additional information about the Portfolio's  investments will be available
in the  Portfolio's  annual  and  semiannual  reports  to  shareholders.  In the
Portfolio's annual reports,  you will find a discussion of the market conditions
and  investment   strategies   that   significantly   affected  the  Portfolio's
performance during its last fiscal year.

STATEMENT OF
ADDITIONAL
INFORMATION

     Additional  information  about  the  Portfolio  and  its  policies  is also
available in the Portfolio's  Statement of Additional  Information  ("SAI"). The
SAI is  incorporated  by reference into this  Prospectus (is legally  considered
part of this Prospectus).

     The Portfolio's annual and semiannual reports (when they become available),
and the SAI, are available free upon request by calling 1-800-637-1380.

To obtain other information and for shareholder inquiries:

     By telephone -- Call 1-800-637-1380

     By mail -- Northern Institutional Funds P.O. Box 75943 Chicago, IL 60675

     On the  Internet -- Text-only  versions of the  Portfolio's  documents  are
available on the SEC's website at http://www.sec.gov

     You may review and obtain  copies of Trust  documents by visiting the SEC's
Public  Reference Room in  Washington,  D.C. You may also obtain copies of Trust
documents  by sending  your  request and a  duplicating  fee to the SEC's Public
Reference Section, Washington, D.C. 20549-6009.  Information on the operation of
the Public Reference Room may be obtained by calling the SEC at 1-800-SEC-0330.

Northern
Institutional Funds

811-3605

INVESTMENT ADVISER

The Northern Trust Company
50 South LaSalle Street
Chicago, IL 60675

TRANSFER AGENT
AND CUSTODIAN

The Northern Trust Company



                            Northern Institutional Funds

                               MUNICIPAL PORTFOLIO
                                     SHARES

                                OCTOBER __, 1999



Northern Institutional Funds


                         MUNICIPAL PORTFOLIO
                         SHARES




Prospectus dated October __, 1999

     An  investment  in the  Portfolio  is not a deposit  of any bank and is not
insured or guaranteed by the Federal Deposit Insurance  Corporation or any other
government  agency.  Although the Portfolio  seeks to preserve the value of your
investment at $1.00 per share,  it is possible to lose money by investing in the
Portfolio.

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

Contents

RISK/RETURN                                      MUNICIPAL PORTFOLIO
SUMMARY

Information about the                            Principal Investment Risks
objective, principal
strategies and risk                              Portfolio Performance
characteristics of the Portfolio
                                                 Portfolio Fees and Expenses
________________________________________________________________________________

MANAGEMENT                                       Investment Adviser
OF THE
PORTFOLIO                                        Advisory Fees

                                                 Portfolio Management

                                                 Other Portfolio Services
_______________________________________________________________________________

ABOUT YOUR                                       Purchasing and Selling Shares
ACCOUNT
                                                      Investors
How to open, maintain
and close an account                                  Share Classes

                                                      Opening an Account

                                                      Selling Shares

                                         Account Policies and Other Information

                                               Automatic Investment Arrangements

                                               Purchase and Redemption Minimums

                                                     Calculating Share Price

                                                    Timing of Purchase Requests

                                                     Tax Identification Number

                                              In-Kind Purchases and Redemptions

                                             Miscellaneous Purchase Information

                                     Timing of Redemption and Exchange Requests

                                            Miscellaneous Redemption Information

                                                      Exchange Privileges

                                                      Telephone Transactions

                                      Advance Notification of Large Transactions

                                      Making Changes to Your Account Information

                                                      Business Day

                                                      Early Closings

                                                      Authorized Intermediaries

                                                  Information About Institutions

                                                 Distributions and Taxes

                                                      Distributions

                                                      Taxes

                                                      Other Tax Information

                                                 Year 2000 Issues
_______________________________________________________________________________

APPENDIX                             Additional Information on Portfolio Risks,
                                                Securities and Techniques
_______________________________________________________________________________

FOR MORE                                    Statement of Additional Information
INFORMATION



          Northern  Institutional  Funds (the "Trust")  offers five money market
     portfolios  to  institutional  investors.  This  Prospectus  describes  the
     Municipal Portfolio (the "Portfolio"). Descriptions of the four other money
     market portfolios are included in separate  prospectuses.  The Portfolio is
     authorized to offer three  classes of shares:  Shares,  Service  Shares and
     Premier  Shares.  Service  Shares and  Premier  Shares are  described  in a
     separate  prospectus.  The Trust's six fixed income, one balanced and seven
     equity portfolios are also described in separate prospectuses.

          The description on the following pages may help you determine  whether
     the Portfolio fits your investment  needs.  Keep in mind that the Portfolio
     can not guarantee it will meet its  investment  objective and it should not
     be relied upon as a complete investment program.

          The Portfolio  seeks to maintain a stable net asset value of $1.00 per
     share. Consistent with this policy, the Portfolio:

          o Limits its dollar-weighted  average portfolio maturity to 90 days or
          less;

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

          o Invests only in U.S.  dollar-denominated  securities  that represent
          minimal credit risks.

          In  addition,  the  Portfolio  limits  its  investments  to  "Eligible
     Securities" as defined by the Securities and Exchange  Commission  ("SEC").
     Eligible  Securities  include,  generally,  securities that either (a) have
     short-term  debt ratings at the time of purchase in the two highest  rating
     categories  or (b) are  issued or  guaranteed  by, or  otherwise  allow the
     Portfolio to demand payment from, an issuer with those ratings.  Securities
     that are unrated  (including  securities of issuers that have long-term but
     not  short-term  ratings)  may  be  deemed  to be  Eligible  Securities  if
     determined to be of comparable  quality by The Northern Trust Company under
     the direction of the Board of Trustees.  Securities that are in the highest
     short-term rating category (and comparable  unrated  securities) are called
     "First Tier  Securities."  Securities in which the Portfolio may invest may
     not  earn  as  high a  level  of  income  as  long-term  or  lower  quality
     securities,  which generally have greater market risk and more  fluctuation
     in market value.

          In accordance  with current SEC  Regulations,  the Portfolio  will not
     invest  more  than 5% of the  value  of its  total  assets  at the  time of
     purchase in the securities of any single issuer. However, the Portfolio may
     invest up to 25% of its total assets in the  securities  of a single issuer
     for up to three  Business  Days.  These  limitations  do not apply to cash,
     certain repurchase agreements,  U.S. government securities or securities of
     other investment  companies.  In addition,  certain  securities  subject to
     unconditional   guarantees  and   securities   that  are  not  "First  Tier
     Securities" as defined by the SEC are subject to different  diversification
     requirements as described in the Statement of Additional Information.

          In addition to the instruments described in the table above and on the
     pages below, the Portfolio may use various investment techniques in seeking
     its  investment  objective.  You can learn more about these  techniques and
     related risks by reading the Appendix to this  Prospectus and the Statement
     of Additional Information.

                               RISK/RETURN SUMMARY

MUNICIPAL PORTFOLIO

INVESTMENT OBJECTIVE

          The  Portfolio  seeks to provide,  to the extent  consistent  with the
     preservation of capital and prescribed portfolio standards, a high level of
     income  exempt from regular  Federal  income tax by investing  primarily in
     municipal  instruments.  This objective may be changed without  shareholder
     approval.

PRINCIPAL INVESTMENT STRATEGIES

          The Portfolio seeks to achieve its objective by investing primarily in
     high-quality short-term  instruments,  the interest on which is exempt from
     regular Federal income tax ("municipal instruments"). These may include:

          - Fixed and variable rate notes and similar debt instruments;

          - Tax-exempt commercial paper;

          - Municipal bonds, notes, paper or other instruments; and

          - Municipal  bonds and notes which are  guaranteed as to principal and
          interest  or  backed  by  the  U.S.  government  or  its  agencies  or
          instrumentalities.

          Under normal  circumstances,  at least 80% of the  Portfolio's  annual
     gross  income will be derived  from  municipal  instruments.  Under  normal
     market  conditions,  uninvested  cash holdings and  investments  in taxable
     instruments  will not  exceed  20% of the value of the total  assets of the
     Portfolio.  During temporary defensive periods, however, all or any portion
     of the  Portfolio's  assets may be held  uninvested  or invested in taxable
     instruments.

          The  Portfolio  is not limited in the amount of its assets that may be
     invested in AMT  obligations  ("private  activity  bonds") the  interest on
     which may be treated as an item of tax preference to shareholders under the
     Federal alternative minimum tax. To the extent the Portfolio invests in AMT
     obligations,  some portion of the  Portfolio's  dividends may be subject to
     the alternative minimum tax.

PRINCIPAL INVESTMENT RISKS

          All investments  carry some degree of risk which will affect the value
     of the Portfolio's investments, investment performance, yield and the price
     of its shares.

          An investment in the Portfolio is not a deposit of any bank and is not
     insured or guaranteed by the Federal Deposit  Insurance  Corporation or any
     other government agency. Although the Portfolio seeks to preserve the value
     of your  investment  at $1.00 per share,  it is  possible  to lose money by
     investing in the Portfolio.

The following summarizes the principal risks that may affect the Portfolio.

          MONEY MARKET RISK is the risk that the  Portfolio  will not be able to
     maintain a net asset value per share of $1.00 at all times.

          INTEREST RATE RISK is the risk that during periods of rising  interest
     rates, the Portfolio's  yield (and the market value of its securities) will
     tend to be lower  than  prevailing  market  rates;  in  periods  of falling
     interest  rates,  the  Portfolio's  yield  (and  the  market  value  of its
     securities) will tend to be higher.

          CREDIT (OR  DEFAULT)  RISK is the risk that an issuer of fixed  income
     securities  held by the  Portfolio  may  default on its  obligation  to pay
     interest and repay principal.  Generally,  the lower the credit rating of a
     security, the greater the risk that the issuer of the security will default
     on its obligation.  High quality  securities are generally believed to have
     relatively low degrees of credit risk.

          PREPAYMENT (OR CALL) RISK is the risk that an issuer will exercise its
     right to pay principal on an obligation held by the Portfolio  earlier than
     expected.  This may happen  during a period of  declining  interest  rates.
     Under these circumstances, the Portfolio may be unable to recoup all of its
     initial  investment  and will  suffer  from  having  to  reinvest  in lower
     yielding  securities.  The  loss  of  higher  yielding  securities  and the
     reinvestment at lower interest rates can reduce the Portfolio's income.

          DEBT EXTENSION RISK is the risk that an issuer will exercise its right
     to pay  principal  on an  obligation  held  by the  Portfolio  (such  as an
     asset-backed security) later than expected. This may happen during a period
     of rising  interest  rates.  Under  these  circumstances,  the value of the
     obligation  will decrease and the Portfolio  will suffer from the inability
     to invest in higher yielding securities.

          CREDIT  ENHANCEMENT RISK is the risk that changes in credit quality of
     a  [U.S.  or  foreign]  bank[,   insurance   company]  or  other  financial
     institution could cause the Portfolio's investments in securities backed by
     letters  of  credit  or other  credit  enhancements  issued by such bank or
     institution to decline in value.

          MANAGEMENT  RISK is the risk that a  strategy  used by the  investment
     management team may fail to produce the intended results.

          LIQUIDITY  RISK is the risk that the Portfolio will not be able to pay
     redemption  proceeds on the same  Business  Day that  shares are  redeemed,
     because  of  unusual  market  conditions,   an  unusually  high  volume  of
     redemption requests or other reasons.

          YEAR 2000 RISK is the risk that the  Portfolio's  operations  or value
     will  be  adversely   affected  by  the  "Year  2000  Problem."  (For  more
     information, please see "Year 2000 Issues" on page __.)

          CONCENTRATION  RISK  is the  risk  that  the  Portfolio  may  be  more
     sensitive to an adverse economic,  business or political  development if it
     invests more than 25% of its assets in the municipal instruments of issuers
     in the same state, in municipal instruments the interest upon which is paid
     solely from  revenues of similar  projects,  or in  industrial  development
     bonds.

          TAX RISK is the risk that future legislative or administrative changes
     or court  decisions may  materially  affect the ability of the Portfolio to
     pay tax-exempt dividends.

          More  information  about the risks of  investing  in the  Portfolio is
     provided in the Appendix to this Prospectus.  You should carefully consider
     the risks  discussed in this section and the Appendix  before  investing in
     the Portfolio.

PORTFOLIO PERFORMANCE

          Since the Portfolio has less than one calendar year of performance, no
     performance information is provided.

PORTFOLIO FEES AND EXPENSES

          This table describes the fees and expenses that you may pay if you buy
     and hold Shares of the Portfolio.  Please note that it does not reflect any
     charges which may be imposed by The Northern Trust Company, its affiliates,
     correspondent  banks and other  institutions on their Customers (as defined
     on page __). (For more information,  please see "Account Policies and Other
     Information" on page __.)


    SHAREHOLDER FEES (fees paid directly from your investment)
     <TABLE>
<CAPTION>
<S>   <C>                                                                             <C>
                                                                                      Municipal Portfolio

                                                                                      Shares

    Sales Charge (Load) Imposed on Purchases.................                         None
    Deferred Sales Charge (Load).............................                         None
    Sales Charge (Load) Imposed on Reinvested
        Distributions........................................                         None
    Redemption Fees..........................................                         None
    Exchange Fees............................................                         None

ANNUAL PORTFOLIO OPERATING EXPENSES
(expenses that are deducted from Portfolio assets)1
    Management Fees2.........................................                         0.25%
    Distribution (12b-1) Fees................................                         None
    Other Expenses3..........................................                         0.14%
    Total Annual Portfolio Operating Expenses4...............                         0.39%
</TABLE>

          1 The Portfolio's  annual operating  expenses are based on actual fees
     and estimated expenses for the current fiscal year.

          2 As of the  date of  this  Prospectus,  the  Northern  Trust  Company
     ("Northern")  is voluntarily  waiving a portion of its management  fees for
     the Portfolio.  As a result of the fee waiver, actual management fees to be
     paid by the  Portfolio  are  0.10% of the  Portfolio's  average  daily  net
     assets.  Fee  waivers  may be  terminated  at any  time  at the  option  of
     Northern.

          3 "Other Expenses" include  administration fees and all other ordinary
     operating  expenses of the Portfolio  not listed above.  Northern and First
     Data Investor  Services Group,  Inc. ("First Data Investor Services Group")
     as  co-administrators  are  entitled  to a  co-administration  fee from the
     Portfolio at an annual rate of 0.10% of the  Portfolio's  average daily net
     assets. The co-administrators  have agreed to reimburse expenses (including
     fees  payable  to  Northern  and  First  Data  Investor  Services  Group as
     co-administrators,  but excluding  management  fees,  transfer agency fees,
     servicing fees and  extraordinary  expenses)  which exceed on an annualized
     basis 0.10% of the Portfolio's average daily net assets. As a result of the
     expense  reimbursement,  estimated  "Other Expenses" are currently 0.10% of
     the Portfolio's average daily net assets.

          4 As a result of the fee waivers and expense reimbursements, estimated
     actual  total  annual  operating  expenses  for the  Portfolio is set forth
     below. Fee waivers (and voluntary  expense  reimbursements,  if applicable)
     may be  terminated  at any time at the option of Northern.  If this occurs,
     "Other Operating Expenses" may increase without shareholder approval.

                                       Total Annual Portfolio Operating Expenses

         Municipal Portfolio Shares                         0.20%
         .........


EXAMPLE

          The  following  Example is  intended  to help you  compare the cost of
     investing  in Shares of the  Portfolio  (without  fee  waivers  and expense
     reimbursements) with the cost of investing in other mutual funds.

          The Example  assumes that you invest  $10,000 in the Portfolio for the
     time  periods   indicated   (with   reinvestment   of  all   dividends  and
     distributions)  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 Portfolio's  operating expenses remain the same. Although
     your actual costs may be higher or lower,  based on these  assumptions your
     costs would be:

                                                          1 Year       3 Years

MUNICIPAL PORTFOLIO SHARES                                $40          $125



                           MANAGEMENT OF THE PORTFOLIO

Investment Adviser

          The Northern Trust Company  ("Northern" or the "Investment  Adviser"),
     an Illinois  state-chartered bank and member of the Federal Reserve System,
     serves as investment  adviser for the Portfolio.  The Investment Adviser is
     located  at 50 South  LaSalle  Street,  Chicago,  Illinois  60675  and is a
     wholly-owned  subsidiary  of Northern  Trust  Corporation,  a bank  holding
     company.  As of September  30, 1999,  Northern  Trust  Corporation  and its
     subsidiaries had  approximately  $____ billion in assets,  $____ billion in
     deposits and employed over _____ persons.

          Northern  and  its  affiliates  administrated  in  various  capacities
     (including   as  master   trustee,   investment   manager   or   custodian)
     approximately $____ trillion of assets as of September 30, 1999,  including
     approximately  $___ billion of assets for which Northern and its affiliates
     had investment management responsibility. Under its Advisory Agreement with
     the Trust, the Investment  Adviser,  subject to the general  supervision of
     the  Trust's  Board of  Trustees,  is  responsible  for  making  investment
     decisions for the  Portfolio  and for placing  purchase and sale orders for
     portfolio securities.

Advisory Fees

          As  compensation  for its  advisory  services  and its  assumption  of
     related  expenses,  the  Investment  Adviser is entitled to an advisory fee
     from the  Portfolio,  computed  daily  and  payable  monthly,  at an annual
     contractual  rate of 0.25%  (expressed as a percentage  of the  Portfolio's
     average daily net assets).

          The difference,  if any, between the contractual  advisory fee and the
     actual  advisory  fee that is paid by the  Portfolio  will reflect that the
     Investment  Adviser did not charge the full amount of the  advisory  fee to
     which it was entitled. The Investment Adviser may discontinue or modify its
     voluntary limitation in the future at its discretion.

Portfolio Management

          The  Investment  Adviser  employs a team  approach  to the  investment
     management of the Portfolio,  relying upon investment  professionals  under
     the leadership of James M. Snyder,  Chief Investment  Officer and Executive
     Vice President of Northern. Mr. Snyder oversees the management of all fixed
     income,  equity and money market assets managed by the Investment  Adviser.
     Mr. Snyder joined Northern Trust in 1980.

Other Portfolio Services

          Northern  also  serves  as  transfer  agent  ("Transfer   Agent")  and
     custodian for the Portfolio.  As Transfer Agent,  Northern performs various
     administrative servicing functions, and any shareholder inquiries should be
     directed to it. The fees that  Northern  receives for its services in those
     capacities  are  described  in the  Statement  of  Additional  Information.
     Northern and First Data Investor Services Group, Inc. ("First Data Investor
     Services"),  a wholly-owned subsidiary of First Data Corporation,  serve as
     co-administrators  for  the  Portfolio.   First  Data  Distributors,   Inc.
     ("FDDI"),  a  subsidiary  of  First  Data  Investor  Services,   serves  as
     distributor  for the  Portfolio.  The fees that  Northern  and  First  Data
     Investor  Services  receive  for their  services  in these  capacities  are
     described on page ___ under  "Portfolio  Fees and Expenses."  FDDI does not
     receive any compensation from the Trust for its distribution services.

PURCHASING AND SELLING SHARES
________________________________________________________________________

Investors

          Institutional  investors,  which are  acting on their own behalf or on
     behalf of their  customers,  clients,  employees,  participants  and others
     ("Customers"),  may invest in the  Portfolio  through  their  institutional
     accounts at  Northern or an  affiliate.  They may also  establish  accounts
     directly with the Trust.  There is no sales charge imposed on  investments.
     Institutional investors ("Institutions") include:

      Northern and its affiliates;

          Defined  contribution  plans  having at least $30 million in assets or
     annual contributions of at least $5 million; and

      Other institutions and organizations.
________________________________________________________________________

Share Classes

          The Portfolio offers three classes of shares:  Shares,  Service Shares
     and Premier  Shares.  Service  Shares and Premier Shares are described in a
     separate prospectus.

          Shares of each  class bear  their pro rata  portion  of all  operating
     expenses paid by the Portfolio,  except  amounts  payable under the Service
     Plan that has been adopted for the  Portfolio's  Service Shares and Premier
     Shares and transfer agency fees. Because of these class-specific  expenses,
     the performance of the Shares of the Portfolio described in this Prospectus
     is expected to be higher than the  performance  of both the Service  Shares
     and Premier Shares of the Portfolio and the  performance of the Portfolio's
     Service Shares is expected to be higher than the performance of the Premier
     Shares.
     ________________________________________________________________________

Opening An Account

          You may purchase  Shares of the Portfolio  through your  institutional
     account at Northern (or an affiliate)  or you may open an account  directly
     with the Trust with a minimum  initial  investment  of $5 million in one or
     more  portfolios  of the Trust.  This minimum does not apply,  however,  to
     Shares purchased through a Northern cash sweep program. There is no minimum
     for subsequent investments.

          Through an Institutional  Account. If you are opening an institutional
     account  at  Northern,  a Northern  representative  can assist you with all
     phases of your investment. To purchase Shares through your account, contact
     your Northern representative for further information.

          Directly from the Trust. An Institution may open a shareholder account
     and  purchase   Shares  directly  from  the  Trust  as  described  in  this
     Prospectus.
     ________________________________________________________________________

By Mail.

Read this Prospectus carefully.

Complete and sign the new account application.

Include a certified corporate resolution (or other acceptable evidence of
 authority).

Enclose a check or Federal Reserve draft payable to the Portfolio.

Mail your check, corporate resolution and completed application to:

        Northern Institutional Funds
        c/o The Northern Trust Company
        P.O. Box 75943
        Chicago, Illinois 60675-5943

All checks must be payable in U.S.  dollars and drawn on a bank located in
the United States.  Cash and third party checks are not acceptable.
________________________________________________________________________

By Telephone.

Read this Prospectus carefully.

Call the Transfer Agent at 1-800-637-1380.

To open a new account please provide:

o      The name of the Portfolio in which you'd like to invest

o      The number of Shares or dollar amount to be invested

o      The method of payment

To add to an existing account, please provide:

o      The Institution's name

o      Your Account Number

By Wire or Automated Clearing House Transfer ("ACH Transfer").

To open a new account:

Call the Transfer Agent at 1-800-637-1380 for instructions.

For more information about the purchase of Shares, call the Transfer Agent
at 1-800-637-1380.

To add to an existing account:

Have your bank wire Federal funds or effect an ACH Transfer to:

        The Northern Trust Company
        Chicago, Illinois
        ABA Routing No. 0710-00152
        (Reference 10 Digit Portfolio Account No.)
        (Reference Shareholder's Name)
________________________________________________________________________

Selling Shares

          Through  an  Institutional  Account.  Institutions  may sell  (redeem)
     Shares  through their  institutional  account by contacting  their Northern
     account representative.

          Directly through the Trust. Institutions that purchase Shares directly
     from the Trust may redeem their Shares through the Transfer Agent in one of
     the following ways:

By Mail.

Send a written request to:

        Northern Institutional Funds
        c/o The Northern Trust Company
        P.O. Box 75943
        Chicago, Illinois 60675-5943

The letter of instruction must include:

o      The signature of a duly authorized person

o      Your account number

o      The name of the Portfolio

o      The number of Shares or the dollar amount to be redeemed

By Telephone.

          Call the Transfer Agent at 1-800-637-1380 for instructions.

          During  periods  of unusual  economic  or market  activity,  telephone
     redemptions  may be difficult  to  implement.  In such event,  shareholders
     should follow the procedures outlined above under "Selling Shares By Mail."

By Wire.

o    Call the Transfer Agent at 1-800-637-1380 for instructions.

      You must have given authorization for expedited wire redemption.

o    The minimum amount that may be redeemed by this method is $10,000.

                     ACCOUNT POLICIES AND OTHER INFORMATION

          Automatic  Investment  Arrangements.  Institutions may purchase Shares
     through  their  institutional  accounts  at  Northern  either by  directing
     automatic  investment  of cash  balances  in excess of certain  agreed upon
     amounts or by directing  investments  from time to time on a  non-automatic
     basis.  Northern will place a purchase order  generated  under an automatic
     investment direction either on the Business Day that funds are available in
     the account or on the next  Business Day,  depending  upon the terms of the
     automatic  investment  arrangement.   Similarly,   Northern  will  place  a
     redemption order generated under an automatic  investment  direction either
     on the Business Day Northern  calculates  the  redemption  amount needed to
     bring the  account  balance  up to the  agreed  upon  amount or on the next
     Business  Day,  depending  upon  the  terms  of  the  automatic  investment
     arrangement.  If a  redemption  order is placed on the next  Business  Day,
     Northern  will  normally  provide  funds  by  provisionally  crediting  the
     Institution's  account  on the day the  calculation  is made.  Institutions
     should  contact  Northern  for  more  information   about  their  automatic
     investment arrangements.

          Purchase  and  Redemption   Minimums.   There  is  a  minimum  initial
     investment of $5 million in the Portfolio and one or more other  investment
     portfolios of the Trust.  This minimum does not apply,  however,  to Shares
     purchased  through a Northern cash sweep  program.  There is no minimum for
     subsequent investments.  A $10,000 minimum applies for redemptions by wire.
     The Trust reserves the right to waive purchase and redemption  minimums and
     to determine the manner in which a minimum is satisfied.

          Calculating Share Price. The Trust issues Shares and redeems Shares at
     net asset value  ("NAV").  The NAV for each share class of the Portfolio is
     calculated by dividing the value of net assets  attributed to that class by
     the number of  outstanding  shares of the class.  The NAV for the Portfolio
     and class is calculated as of 3:00 p.m.,  Chicago time,  each Business Day.
     The NAV used in determining  the price of your Shares is the one calculated
     after your purchase,  exchange or redemption  order is received or accepted
     as described below.

          The  Portfolio  seeks to maintain an NAV of $1.00 per share by valuing
     the  obligations  held by it at  amortized  cost  in  accordance  with  SEC
     regulations. Amortized cost will normally approximate market value.

          Timing of Purchase  Requests.  Requests accepted by the Transfer Agent
     or  other  authorized  intermediary  by 1:00  p.m.,  Chicago  time,  on any
     Business Day will be executed the same day, provided that either:

          o The Transfer  Agent  receives the purchase price in Federal or other
     immediately  available  funds prior to 1:00 p.m.,  Chicago  time,  the same
     Business Day;

          o The order is accepted by an authorized  intermediary  and payment is
     to be made by the  close  of the  same  Business  Day in  Federal  or other
     immediately  available  funds  according to  procedures  authorized  by the
     Trust; or

          o Payment in Federal or other immediately  available funds is received
     by  the  close  of  the  same  Business  Day  in an  institutional  account
     maintained with Northern or an affiliate.

          Orders received by the Transfer Agent or other authorized intermediary
     on a non-Business  Day or after 1:00 p.m.,  Chicago time, on a Business Day
     will be executed on the next Business Day, provided that payment is made as
     noted above.  We consider  requests to be in "good order" when all required
     documents  are  properly  completed,  signed  and  received,   including  a
     certified  corporate  resolution or other acceptable evidence of authority.
     If an Institution  pays for Shares by check,  Federal funds  generally will
     become  available  within  two  Business  Days  after a  purchase  order is
     received.

          If payment  is not  received  as  described  above from an  authorized
     intermediary  on the same  Business  Day of  acceptance  of an order by the
     authorized intermediary, the authorized intermediary may be liable for fees
     and losses and the transaction may be cancelled.

          In  certain  circumstances,  the Trust may  advance  the time by which
     purchase orders must be received. See "Early Closings" on page __.

          Tax Identification  Number. Federal regulations require you to provide
     to the  Transfer  Agent a taxpayer  identification  number when you open an
     account.  Purchase  orders  without such a number or an  indication  that a
     number has been applied for will not be accepted. If you have applied for a
     number,  you must  provide it to the  Transfer  Agent within 60 days of the
     date of the order.

          In-Kind  Purchases and  Redemptions.  The Trust  reserves the right to
     accept  payment for Shares in the form of securities  that are  permissible
     investments  for the  Portfolio.  The Trust also  reserves the right to pay
     redemptions  by a  distribution  "in-kind" of securities  (instead of cash)
     from the Portfolio. See the Statement of Additional Information for further
     information about the terms of these purchases and redemptions.

Miscellaneous Purchase Information.

          o Institutions are responsible for transmitting purchase orders to the
     Transfer Agent and delivering required funds on a timely basis.

          o  Institutions  are  responsible  for all losses and  expenses of the
     Portfolio  in the event of any  failure to make  payment  according  to the
     procedures outlined in this Prospectus. Northern may redeem shares from any
     account it maintains to protect the Portfolio and Northern against loss. In
     addition, a $20 charge will be imposed if a check does not clear.

          o Shares of the Portfolio  are entitled to the  dividends  declared by
     the Portfolio beginning on the Business Day the purchase order is executed,
     provided  payment  in  Federal  or  other  immediately  available  funds is
     received by the Transfer Agent by the time designated above.

          o The Trust reserves the right to reject any purchase order. The Trust
     also  reserves  the  right to  change or  discontinue  any of its  purchase
     procedures.

          Timing of Redemption  and Exchange  Requests.  Redemption and exchange
     requests will be effected at the NAV next determined after your exchange or
     redemption  order is  received  in good  order.  Good order  means that the
     request includes the following:  the account number and Portfolio name; the
     amount of the  transaction  (as  specified  in dollars or shares);  and the
     signature  of a duly  authorized  person  (except  for  telephone  and wire
     redemptions). See "Account Policies and Other Information -- Making Changes
     to Your Account Information."

          If  either  the  Transfer  Agent or  Northern  (with  respect  to your
     institutional  account)  receives a redemption order by 1:00 p.m.,  Chicago
     time,  on a Business  Day,  redemption  proceeds  will  normally be paid in
     Federal funds or other  immediately  available funds wired or sent by check
     to you or, if you so choose, to your  institutional  account with Northern,
     on the same Business Day.

          Redemption  orders  received  after 1:00 p.m.,  Chicago time,  will be
     effected the next Business Day.  Proceeds for redemption orders received on
     a  non-Business  Day will  normally be sent on the next  Business Day after
     receipt in good order.

          In  certain  circumstances,  the Trust may  advance  the time by which
     redemption and exchange  orders must be received.  See "Early  Closings" on
     page __.

          Miscellaneous Redemption Information.  All redemption proceeds will be
     sent by check unless the Transfer Agent is directed  otherwise.  Redemption
     proceeds may also be wired. A redemption  request may not be processed if a
     shareholder  has failed to submit a completed  and  properly  executed  new
     account  application,  including a corporate resolution or other acceptable
     evidence of authority.

          o The Trust reserves the right to defer  crediting,  sending or wiring
     redemption  proceeds for up to 7 days after receiving the redemption  order
     if,  in its  judgment,  an  earlier  payment  could  adversely  affect  the
     Portfolio.

          o If you are redeeming  recently  purchased  Shares,  your  redemption
     request may not be honored until your check or electronic  transaction  has
     cleared. This may delay your transaction for up to 15 days.

          o Institutions are responsible for transmitting  redemption  orders to
     the Transfer Agent and crediting their Customers'  accounts with redemption
     proceeds on a timely basis.

          o Redemption requests by mail must be signed by a person authorized by
     acceptable documentation on file with the Transfer Agent.

          o Dividends on Shares are earned  through and  including the day prior
     to the day on which they are redeemed.

          o  The  Trust  reserves  the  right  to  redeem  Shares  held  by  any
     shareholder  who provides  incorrect or incomplete  account  information or
     when  such   involuntary   redemptions   are  necessary  to  avoid  adverse
     consequences to the Trust and its shareholders.

          o The Trust may require any information reasonably necessary to ensure
     that a redemption request has been duly authorized.

          o The Trust  reserves  the right to change or  discontinue  any of its
     redemption procedures.

          Exchange  Privileges.  Institutions and their Customers (to the extent
     permitted by their account agreements) may exchange Shares of the Portfolio
     for Shares of another portfolio. The registration of both accounts involved
     must be identical.  A $1,000 minimum investment  applies.  An exchange is a
     redemption of shares you own and the purchase of shares you are  acquiring.
     It is considered a taxable event and may result in a gain or loss.

          The Trust  reserves  the right to change or  discontinue  the exchange
     privilege at any time upon 60 days' written notice to  shareholders  and to
     reject any exchange  request.  Exchanges are only available in states where
     an exchange can legally be made.  Before making an exchange you should read
     the prospectus for the shares you are acquiring.

          Telephone Transactions. For your protection, telephone requests may be
     recorded in order to verify their accuracy. In addition, the Transfer Agent
     has adopted  procedures  in an effort to  establish  reasonable  safeguards
     against fraudulent telephone transactions. If reasonable measures are taken
     to  verify  that  telephone  instructions  are  genuine,  the Trust and its
     service  providers  will not be  responsible  for any loss  resulting  from
     fraudulent or  unauthorized  instructions  received over the telephone.  In
     these  circumstances,  shareholders  will  bear the  risk of  loss.  During
     periods of unusual market activity,  you may have trouble placing a request
     by telephone. In this event, consider sending your request in writing.

          The proceeds of redemption  orders  received by telephone will be sent
     by check,  wire or transfer  according to proper  instructions.  All checks
     will be made  payable to the  shareholder  of record and mailed only to the
     shareholder's address of record.

The Trust reserves the right to refuse a telephone redemption.

          Advance Notification of Large Transactions. The Trust requests that an
     Institution  give  advance  notice  to the  Transfer  Agent by 11:00  a.m.,
     Chicago time,  if it intends to place a purchase or redemption  order of $5
     million or more on a Business Day.

          Making  Changes to Your Account  Information.  You may make changes to
     wiring  instructions,  address of record, or other account information only
     in writing. These instructions must be accompanied by a certified corporate
     resolution,  signature  guarantee from an institution  participating in the
     Stock Transfer Agency  Medallion  Program  ("STAMP"),  or other  acceptable
     evidence of authority.  In accordance with SEC  regulations,  the Trust and
     Transfer  Agent may charge a  shareholder  reasonable  costs in  locating a
     shareholder's current address.

          Business  Day. A  "Business  Day" is each Monday  through  Friday when
     Northern or the New York Stock  Exchange is open for business.  A "Business
     Day" does not include a holiday  observed by Northern and the Exchange.  In
     1999 these  holidays  are: New Year's Day,  Martin  Luther  King,  Jr. Day,
     Presidents' Day, Memorial Day,  Independence  Day, Labor Day,  Thanksgiving
     and Christmas Day.

          Early  Closings.  The  Portfolio  reserves  the right to cease,  or to
     advance the time for, accepting purchase, redemption or exchange orders for
     same  Business Day credit when  Northern or the Exchange  closes early as a
     result of unusual weather or other conditions.  It also reserves this right
     when The Bond Market  Association  recommends that securities markets close
     or close early.

          Authorized  Intermediaries.  The Trust may authorize certain financial
     intermediaries  (including banks,  trust companies,  brokers and investment
     advisers), which provide recordkeeping,  reporting and processing services,
     to accept purchase,  redemption and exchange orders from their Customers on
     behalf of the Trust. They may also designate other intermediaries to accept
     such  orders,  if  approved  by the Trust.  Authorized  intermediaries  are
     responsible for transmitting orders and delivering funds on a timely basis.
     The  Portfolio  will be deemed to have  received an order when the order is
     accepted by the  authorized  intermediary  on a Business Day, and the order
     will be priced at the Portfolio's per share NAV next determined.

          Information About Institutions. Customers purchasing Shares through an
     Institution   should   read  their   account   agreements   carefully.   An
     Institution's requirements may differ from those listed in this Prospectus.
     An Institution may impose account  charges,  such as asset allocation fees,
     account maintenance fees, and other charges that will reduce the net return
     on an  investment  in  the  Portfolio.  If a  Customer  has  agreed  with a
     particular  Institution to maintain a minimum  balance with the Institution
     and the balance falls below this  minimum,  the Customer may be required to
     redeem all or a part of his investment in the Portfolio.

          Northern  may  provide  compensation  to  certain  dealers  and  other
     financial intermediaries who provide services to their Customers who invest
     in the Trust or whose Customers purchase  significant  amounts of Shares of
     the Portfolio.  The amount of such  compensation  may be made on a one-time
     and/or  periodic  basis,  and may  represent all or a portion of the annual
     fees earned by Northern as Investment  Adviser  (after  adjustments).  This
     compensation  will be paid by  Northern  or its  affiliates  and  will  not
     represent an additional expense to the Trust or its shareholders.

          State securities laws regarding the registration of dealers may differ
     from Federal law. As a result,  Institutions  investing in the Portfolio on
     behalf of their Customers may be required to register as dealers.

DISTRIBUTIONS AND TAXES

DISTRIBUTIONS

          Dividends  from net income are declared  daily and paid monthly by the
     Portfolio to its shareholders.  Net income includes the interest accrued on
     the  Portfolio's  assets  less  estimated  expenses.  The  Portfolio's  net
     realized  short-term  capital  gains,  if any,  are  distributed  at  least
     annually.  The Portfolio  does not expect to realize net long-term  capital
     gain.

          Dividends  are  paid as soon as  practical  following  the end of each
     month,  except in the case of a total  redemption  of Shares in an  account
     that is not  subject to a standing  order for the  purchase  of  additional
     Shares.  In that  event,  dividends  will be paid  promptly  along with the
     redemption proceeds.

          All   distributions   are  paid  by  the  Portfolio  in  cash  or  are
     automatically reinvested (without any sales charge) in additional Shares of
     the Portfolio.  You may make arrangements to credit these  distributions to
     your account with Northern, its affiliates or its correspondent banks.

          There are no fees or sales charges on reinvestments.

TAXES

          The Portfolio intends to qualify as a regulated investment company for
     Federal tax purposes,  and to distribute to shareholders  substantially all
     of its net  investment  income and net capital gain.  There are certain tax
     requirements  that the  Portfolio  must  follow  in order to avoid  Federal
     taxation. In its efforts to adhere to these requirements, the Portfolio may
     have to limit its investment activity in some types of instruments.

          The  Portfolio  expects to pay  "exempt-interest  dividends"  that are
     generally exempt from regular Federal income tax. However, a portion of the
     exempt-interest  dividends  paid  by the  Portfolio  will be an item of tax
     preference  for purposes of  determining  Federal  alternative  minimum tax
     liability.  Exempt-interest  dividends  will also be considered  along with
     other adjusted gross income in determining  whether any Social  Security or
     railroad  retirement payments received by you are subject to Federal income
     taxes.

          If you receive an  exempt-interest  dividend with respect to any share
     and the  share is held  for six  months  or  less,  any loss on the sale or
     exchange  of the share will be  disallowed  to the  extent of the  dividend
     amount.  Interest on indebtedness  incurred by a shareholder to purchase or
     carry shares of the Portfolio  generally will not be deductible for federal
     income tax purposes.

          Except as stated below, you may be subject to state and local taxes on
     Portfolio distributions.  State income taxes may not apply, however, to the
     portions of the Portfolio's distributions, if any, that are attributable to
     interest on certain  types of Federal  securities or interest on securities
     issued by the particular state or municipalities within the state.

          In all  cases,  distributions,  if any,  derived  from  net  long-term
     capital gains will generally be taxable to you as long-term  capital gains,
     and any  dividends  derived  from  short-term  capital  gains  and  taxable
     interest income will be taxable to you as ordinary income.

OTHER TAX INFORMATION

          Dividends  and  distributions  from the  Portfolio  will  generally be
     reportable  by you in the  tax  year in  which  they  are  paid,  with  one
     exception.  Dividends  and  distributions  declared  by  the  Portfolio  in
     October,  November or December and paid in January are taxed as though they
     were paid by December 31.

          Every year, the Trust will send you  information  detailing the amount
     of ordinary  income and capital gains  distributed  to your account for the
     previous year.

          Your   investment  in  the  Portfolio   could  have   additional   tax
     consequences.  You should  consult your tax  professional  for  information
     regarding all the tax  consequences  applicable  to your  investment in the
     Portfolio.  More  information  is provided in the  Statement of  Additional
     Information. This short summary is not intended as a substitute for careful
     tax planning.

          Dividends  paid by the  Portfolio  may be taxable under state or local
     law as dividend  income even though all or a portion of such  dividends may
     be derived from interest on obligations which, if realized directly,  would
     be exempt from such income taxes.

Year 2000 Issues

          Like every other  business  dependent  upon  computerized  information
     processing,  Northern Trust Corporation  ("Northern  Trust") must deal with
     "Year 2000" issues.

          Many computer  systems use two digits rather than four to identify the
     year.  Unless  adapted,   these  systems  may  not  be  able  to  correctly
     distinguish the Year 2000 from the Year 1900. As the Year 2000  approaches,
     many  systems  may be  unable  to  accurately  process  certain  date-based
     information,  which  could  cause a variety  of  operational  problems  for
     businesses. This could have a negative effect on the companies in which the
     Portfolio invests, thus decreasing the Portfolio's investment returns.

          Northern Trust has implemented  steps to prepare its critical computer
     systems  and  processes  for Year 2000  processing.  It has  established  a
     dedicated  Year 2000 Project Team whose  members have  significant  systems
     development and maintenance experience.  Northern Trust's Year 2000 project
     includes a  comprehensive  testing plan of its critical  systems.  Northern
     Trust has advised the Trust that it has substantially completed work on its
     critical  systems and that testing  with outside  parties will be conducted
     during 1999.

          Northern Trust also has a program to monitor and assess the efforts of
     other parties,  such as other service providers to the Portfolio.  However,
     it cannot control the success of those other parties' efforts.  Contingency
     plans are being  established to provide Northern Trust with alternatives in
     case these entities  experience  significant  Year 2000  difficulties  that
     impact Northern Trust.

          Furthermore,   even  if  the  actions  taken  by  Northern  Trust  are
     successful,  the normal  operations of the Portfolio may, in any event,  be
     disrupted significantly by the failure of communications and public utility
     companies, governmental entities, financial processors or others to perform
     their services as a result of Year 2000 problems.


                                    APPENDIX

      ADDITIONAL INFORMATION ON PORTFOLIO RISKS, SECURITIES AND TECHNIQUES

          This  Appendix  takes a closer look at some of the types of securities
     in which the Portfolio may invest and their related risks. It also explores
     the various investment  techniques that the investment management team may,
     but is not required to, use. The Portfolio  may invest in other  securities
     and are subject to further  restrictions  and risks which are  described in
     the Statement of Additional Information.

          ASSET-BACKED  SECURITIES.  Asset-backed  securities  are  sponsored by
     entities  such as  government  agencies,  banks,  financial  companies  and
     commercial  or  industrial  companies.  Asset-backed  securities  represent
     participations  in, or are  secured by and payable  from,  pools of various
     types of real and personal property and other financial assets.  Such asset
     pools are securitized through the use of privately formed trusts or special
     purpose  corporations.  Payments or distributions of principal and interest
     may be guaranteed up to certain  amounts and for a certain time period by a
     letter  of  credit  or a pooled  insurance  policy  issued  by a  financial
     institution, or other credit enhancements.

          INVESTMENT  STRATEGY.  The  Portfolio  may purchase  various  types of
          asset-backed  securities that are "Eligible  Securities" as defined by
          the SEC.

          SPECIAL  RISKS.  In addition to credit and market  risk,  asset-backed
          securities  involve  prepayment  risk  because the  underlying  assets
          (loans) may be prepaid at any time. The value of these  securities may
          also   change   because  of  actual  or   perceived   changes  in  the
          creditworthiness of the originator, the servicing agent, the financial
          institution  providing the credit support,  or the counterparty.  Like
          other fixed income securities,  when interest rates rise, the value of
          an  asset-backed  security  generally  will  decline.   However,  when
          interest rates  decline,  the value of an  asset-backed  security with
          prepayment  features  may not  increase as much as that of other fixed
          income securities.  In addition,  non-mortgage asset-backed securities
          involve  certain  risks not presented by  mortgage-backed  securities.
          Primarily,  these  securities  may not  have the  benefit  of the same
          security interest in the underlying collateral.

          BORROWINGS AND REVERSE REPURCHASE AGREEMENTS. The Portfolio may borrow
     money from  banks and may enter into  reverse  repurchase  agreements  with
     banks and  other  financial  institutions.  Reverse  repurchase  agreements
     involve the sale of money market  securities held by the Portfolio  subject
     to its  agreement  to  repurchase  them at a mutually  agreed upon date and
     price (including interest).

          INVESTMENT  STRATEGY.  The Portfolio may borrow and enter into reverse
          repurchase  agreements in amounts not exceeding one-third of its total
          assets  (including the amount  borrowed).  These  transactions  may be
          entered into as a temporary measure for emergency  purposes or to meet
          redemption requests. Reverse repurchase agreements may also be entered
          into when the  investment  management  team  expects that the interest
          income to be earned from the  investment of the  transaction  proceeds
          will be greater than the related interest expense.

          SPECIAL RISKS.  Borrowings and reverse  repurchase  agreements involve
          leveraging.  If the securities held by the Portfolio  decline in value
          while these  transactions are outstanding,  the net asset value of the
          Portfolio's    outstanding   shares   will   decline   in   value   by
          proportionately  more than the decline in value of the securities.  In
          addition,  reverse  repurchase  agreements  involve the risks that the
          interest  income earned by the Portfolio  (from the  investment of the
          proceeds) will be less than the interest  expense of the  transaction,
          that the market value of the  securities  sold by the  Portfolio  will
          decline  below  the  price  the  Portfolio  is  obligated  to  pay  to
          repurchase the securities, and that the securities may not be returned
          to the Portfolio.

          DERIVATIVES.   The   Portfolio  may  purchase   certain   "derivative"
     instruments.  A derivative is a financial instrument whose value is derived
     from -- or based upon -- the  performance  of underlying  assets,  interest
     rates, or indices.  Derivatives include structured debt obligations such as
     asset-backed  securities,  "stripped"  securities and various floating rate
     instruments.

          INVESTMENT STRATEGY.  The Portfolio will invest in derivatives only if
          the potential  risks and rewards are consistent  with the  Portfolio's
          objective, strategies and overall risk profile.

          SPECIAL RISKS.  Engaging in derivative  transactions  involves special
          risks,  including  (a) market  risk that the  Portfolio's  derivatives
          position will lose value; (b) credit risk that the counterparty to the
          transaction  will default;  (c) leveraging  risk that the value of the
          derivative  instrument  will decline more than the value of the assets
          on which it is based;  (d) illiquidity risk that the Portfolio will be
          unable  to sell  its  position  because  of lack of  market  depth  or
          disruption; (e) pricing risk that the value of a derivative instrument
          will be difficult to determine; and (f) operations risk that loss will
          occur as a result of inadequate  systems or human error. Many types of
          derivatives have been recently developed and have not been tested over
          complete market cycles. For these reasons,  the Portfolio may suffer a
          loss whether or not the analysis of the investment  management team is
          accurate.

          DOWNGRADED SECURITIES.  After its purchase, the portfolio security may
     be  assigned  a lower  rating or cease to be  rated.  If this  occurs,  the
     Portfolio may continue to hold the issue if the Investment Adviser believes
     it is in the best interest of the Portfolio and its shareholders.

          ILLIQUID OR RESTRICTED SECURITIES. Illiquid securities include certain
     variable amount master demand notes that cannot be called within seven days
     and other securities that are traded in the U.S. but are subject to trading
     restrictions  because they are not  registered  under the Securities Act of
     1933, as amended (the "1933 Act").

          INVESTMENT  STRATEGY.  The  Portfolio  may invest up to 10% of its net
          assets in securities that are illiquid. A domestically traded security
          which is not  registered  under  the  1933 Act will not be  considered
          illiquid if the Investment Adviser determines that an adequate trading
          market exists for that security.  If otherwise  consistent  with their
          investment  objectives  and  policies,   the  Portfolio  may  purchase
          commercial  paper issued  pursuant to Section 4(2) of the 1933 Act and
          securities that are not registered  under the 1933 Act but can be sold
          to "qualified institutional buyers" in accordance with Rule 144A under
          the 1933 Act. These securities will not be considered illiquid so long
          as the Investment Adviser determines, under guidelines approved by the
          Trust's Board of Trustees, that an adequate trading market exists.

          SPECIAL  RISKS.  Because  illiquid and  restricted  securities  may be
          difficult  to sell at an  acceptable  price,  they may be  subject  to
          greater  volatility  and may  result in a loss to the  Portfolio.  The
          practice of investing in Rule 144A Securities could increase the level
          of the  Portfolio's  illiquidity  during  any  period  that  qualified
          institutional   buyers  become   uninterested   in  purchasing   these
          securities.

          INVESTMENT  COMPANIES.  In connection with the management of its daily
     cash  positions,  the  Portfolio may invest in shares of other money market
     funds  which  invest  in  short-term,  high  quality  debt  securities  and
     securities  issued  by  other  investment  companies  consistent  with  its
     investment objectives and policies.

          INVESTMENT  STRATEGY.  Investments  by the  Portfolio  in other  money
     market funds will be subject to the  limitations of the Investment  Company
     Act of  1940.  Although  the  Portfolio  does  not  expect  to do so in the
     foreseeable future, the Portfolio is authorized to invest substantially all
     of  its  assets  in an  open-end  investment  company  that  has  the  same
     investment  objective,   policies  and  fundamental   restrictions  as  the
     Portfolio.

          SPECIAL RISKS.  As a shareholder of another  investment  company,  the
          Portfolio  would be subject to the same risks as any other investor in
          that company.  It would also bear a proportionate share of any fees or
          expenses paid by that company.  These expenses would be in addition to
          the advisory fees and other  expenses the Portfolio  bears directly in
          connection with its own operations.

          MUNICIPAL AND RELATED INSTRUMENTS.  Municipal instruments include debt
     obligations  issued by or on behalf of states,  territories and possessions
     of  the  United  States  and  their   political   subdivisions,   agencies,
     authorities and instrumentalities.

          Municipal  instruments  include both "general" and "revenue" bonds and
     may be  issued  to  obtain  funds  for  various  public  purposes.  General
     obligations  are secured by the issuer's  pledge of its full faith,  credit
     and taxing power.  Revenue  obligations  are payable only from the revenues
     derived from a particular  facility or class of facilities.  In some cases,
     revenue  bonds are also payable  from the  proceeds of a special  excise or
     other  specific  revenue  source such as lease  payments from the user of a
     facility  being  financed.  Some  municipal  instruments,  known as private
     activity  bonds,  are issued to finance  projects  for  private  companies.
     Private  activity  bonds are  usually  revenue  obligations  since they are
     typically  payable by the private  user of the  facilities  financed by the
     bonds.

          Municipal instruments also include "moral obligation" bonds, municipal
     leases,   certificates  of  participation  and  custodial  receipts.  Moral
     obligation  bonds  are  supported  by a  moral  commitment  but not a legal
     obligation of a state or municipality.  Municipal leases and  participation
     certificates present the risk that the state or municipality  involved will
     not appropriate  the monies to meet scheduled  payments on an annual basis.
     Custodial receipts represent  interests in municipal  instruments held by a
     trustee.

          The  Portfolio  may  acquire  "stand-by  commitments"  relating to the
     municipal  instruments  it holds.  Under a  stand-by  commitment,  a dealer
     agrees  to  purchase,  at  the  Portfolio's  option,   specified  municipal
     instruments at a specified  price.  A stand-by  commitment may increase the
     cost, and thereby reduce the yield,  of the municipal  instruments to which
     the commitment  relates.  The Portfolio will acquire  stand-by  commitments
     solely to  facilitate  portfolio  liquidity  and do not intend to  exercise
     their rights for trading purposes.

          INVESTMENT  STRATEGY.  In connection with its investments in municipal
     instruments,  the Portfolio may invest more than 25% of its total assets in
     (a)  municipal  instruments  the  interest  upon which is paid  solely from
     revenues of similar projects, and (b) industrial  development  obligations.
     The  Portfolio  may also  invest  more  than 25% of the  value of its total
     assets  in  municipal  instruments  whose  issuers  are in the same  state.
     However, the Portfolio does not intend to invest more than 25% of the value
     of its total assets in industrial  development bonds or similar obligations
     where the  non-governmental  entities supplying the revenues to be paid are
     in the same industry.

          SPECIAL RISKS. Municipal instruments purchased by the Portfolio may be
     backed by letters of credit, insurance or other forms of credit enhancement
     issued by foreign (as well as  domestic)  banks,  insurance  companies  and
     other  financial  institutions.  If the  credit  quality  of  these  banks,
     insurance  companies and  financial  institutions  declines,  the Portfolio
     could  suffer a loss to the extent that the  Portfolio is relying upon this
     credit support.  Foreign  financial  institutions can present special risks
     relating  to higher  transaction  and  custody  costs,  the  imposition  of
     additional   taxes  by  foreign   governments,   less  complete   financial
     information,  less market  liquidity,  more market volatility and political
     instability.  Foreign banks, insurance companies and financial institutions
     may be subject to less  stringent  reserve  requirements,  and to different
     accounting, auditing and recordkeeping requirements than U.S banks.

          In addition,  when a substantial  portion of the Portfolio's assets is
     invested in instruments  which are used to finance  facilities  involving a
     particular  industry,  whose  issuers  are in the same  state or which  are
     otherwise  related,  there is a possibility  that an economic,  business or
     political  development  affecting one instrument  would likewise affect the
     related instrument.

          SECURITIES  LENDING.  In  order to  generate  additional  income,  the
     Portfolio may lend securities on a short-term  basis to banks,  brokers and
     dealers or other qualified  institutions.  In exchange,  the Portfolio will
     receive  collateral  equal to at least 100% of the value of the  securities
     loaned.

          INVESTMENT  STRATEGY.  Securities  lending may  represent no more than
          one-third the value of the  Portfolio's  total assets  (including  the
          loan  collateral).  Any cash  collateral  received by the Portfolio in
          connection  with  these  loans  may be  invested  in  U.S.  government
          securities and other liquid high-grade debt obligations.

          SPECIAL RISKS. The main risk when lending portfolio securities is that
          the borrower might become  insolvent or refuse to honor its obligation
          to  return  the  securities.   In  this  event,  the  Portfolio  could
          experience  delays in recovering its securities and may possibly incur
          a  capital  loss.  In  addition,  the  Portfolio  may  incur a loss in
          reinvesting the cash collateral it receives.

          STRIPPED  OBLIGATIONS.  These  securities  are issued by  governmental
     entities,  banks and other financial institutions.  They entitle the holder
     to receive either  interest  payments or principal  payments that have been
     "stripped" from a debt obligation.

          INVESTMENT  STRATEGY.  To the extent  consistent  with its  investment
          objective, the Portfolio may purchase stripped securities.

          SPECIAL RISKS. Stripped securities are very sensitive to interest rate
          changes  and  to  the  rate  of  principal  prepayments.  A  rapid  or
          unexpected  increase in prepayments could depress the price of certain
          stripped securities and adversely affect the Portfolio's total return.

          TAXABLE     INVESTMENTS.     Taxable    investments    include    U.S.
     dollar-denominated  obligations of U.S. banks, foreign commercial banks and
     securities  issued or  guaranteed  by  foreign  governments;  high  quality
     commercial paper and other  obligations;  high quality  corporate bonds and
     notes; asset-backed securities; securities issued or guaranteed by the U.S.
     government,   its  agencies  or  instrumentalities  and  related  custodial
     receipts; and repurchase agreements relating to the above instruments.

          INVESTMENT STRADEGY.  The Portfolio may invest from time to time, on a
          temporary  basis or for temporary  defensive  purposes,  in short-term
          taxable  instruments that are "Eligible  Securities" as defined by the
          SEC for money market funds.

          SPECIAL  RISKS.  Dividends paid by the Portfolio that are derived from
          interest paid on taxable  investments will generally be taxable to the
          Portfolio's  shareholders  as ordinary  income for Federal  income tax
          purposes.  The Portfolio may not achieve its investment objective when
          its assets are invested in taxable obligations.

          VARIABLE AND FLOATING  RATE  INSTRUMENTS.  Variable and floating  rate
     instruments  have interest rates that are  periodically  adjusted either at
     set intervals or that float at a margin above a generally  recognized index
     rate. These instruments  include long-term variable and floating rate bonds
     (sometimes  referred to as "Put Bonds") where the Portfolio  obtains at the
     time of  purchase  the right to put the bond back to the  issuer or a third
     party at par at a specified date.

          INVESTMENT  STRATEGY.  The  Portfolio  may invest in rated and unrated
          variable and floating rate  instruments to the extent  consistent with
          its investment objective.  Unrated instruments may be purchased by the
          Portfolio if they are  determined by the  Investment  Adviser to be of
          comparable  quality to rated instruments  eligible for purchase by the
          Portfolio.

          SPECIAL RISKS. Because there is no active secondary market for certain
          variable and floating rate instruments,  they may be more difficult to
          sell if the  issuer  defaults  on its  payment  obligations  or during
          periods  when the  Portfolio  is not  entitled to exercise  its demand
          rights.

          WHEN-ISSUED  SECURITIES,  DELAYED  DELIVERY  TRANSACTIONS  AND FORWARD
     COMMITMENTS. A purchase of "when-issued" securities refers to a transaction
     made conditionally  because the securities,  although authorized,  have not
     yet been  issued.  A delayed  delivery  or forward  commitment  transaction
     involves a contract to purchase or sell  securities  for a fixed price at a
     future date beyond the customary settlement period.

          INVESTMENT STRATEGY.  The Portfolio may purchase or sell securities on
          a when-issued,  delayed delivery or forward commitment basis. Although
          the   Portfolio   would   generally   purchase   securities  in  these
          transactions  with the  intention of  acquiring  the  securities,  the
          Portfolio  may dispose of such  securities  prior to settlement if the
          investment management team deems it appropriate to do so.

          SPECIAL  RISKS.  Purchasing  securities  on  a  when-issued,   delayed
          delivery  or  forward  commitment  basis  involves  the risk  that the
          securities may decrease in value by the time they are actually  issued
          or delivered.  Conversely,  selling  securities in these  transactions
          involves the risk that the value of the securities may increase before
          the time they are actually  issued or  delivered.  These  transactions
          also involve the risk that the seller may fail to deliver the security
          or cash on the settlement date.


For More Information

ANNUAL/
SEMIANNUAL
REPORT

          Additional  information  about  the  Portfolio's  investments  will be
     available in the Portfolio's annual and semiannual reports to shareholders.

STATEMENT OF ADDITIONAL INFORMATION

          Additional  information  about the  Portfolio and its policies is also
     available in the Portfolio's  Statement of Additional  Information ("SAI").
     The SAI is  incorporated  by  reference  into this  Prospectus  (is legally
     considered part of this Prospectus).

The  Portfolio's  annual and  semiannual  reports (when they become  available)
 and the SAI are available free upon request by calling 1-800-637-1380.

To obtain other information and for shareholder inquiries:

By telephone -- Call 1-800-637-1380

By mail -- Northern Institutional Funds
              P.O. Box 75943
              Chicago, IL 60675

On the  Internet  --  Text-only  versions  of the  Portfolio's  documents  are
 available  on the SEC's  website at http://www.sec.gov.

          You may review and obtain  copies of Trust  documents  by visiting the
     SEC's Public Reference Room in Washington,  D.C. You may also obtain copies
     of Trust  documents by sending your  request and a  duplicating  fee to the
     SEC's Public Reference Section, Washington, D.C. 20549-6009. Information on
     the operation of the Public  Reference  Room may be obtained by calling the
     SEC at 1-800-SEC-0330.

Northern
Institutional Funds
SHARES PROSPECTUS

811-3605


INVESTMENT ADVISER

The Northern Trust Company
50 South LaSalle Street
Chicago, IL 60675

TRANSFER AGENT
AND CUSTODIAN

The Northern Trust Company



                            Northern Institutional Funds

                               MUNICIPAL PORTFOLIO

                                 SERVICE SHARES
                                 PREMIER SHARES


                                OCTOBER __, 1999



Northern Institutional Funds


                                                MUNICIPAL PORTFOLIO

                                                  SERVICE SHARES
                                                  PREMIER SHARES





Prospectus dated October __, 1999

          An investment in the Portfolio is not a deposit of any bank and is not
     insured or guaranteed by the Federal Deposit  Insurance  Corporation or any
     other government agency. Although the Portfolio seeks to preserve the value
     of your  investment  at $1.00 per share,  it is  possible  to lose money by
     investing in the Portfolio.

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

Contents

RISK/RETURN                                      MUNICIPAL PORTFOLIO
SUMMARY

Information about the                            Principal Investment Risks
objective, principal
strategies and risk                              Portfolio Performance
characteristics of the Portfolio
                                                 Portfolio Fees and Expenses
_______________________________________________________________________________

MANAGEMENT                                       Investment Adviser
OF THE
PORTFOLIO                                        Advisory Fees

                                                 Portfolio Management

                                                 Other Portfolio Services
________________________________________________________________________________

ABOUT YOUR              Purchasing and Selling Service Shares and Premier Shares
ACCOUNT
                                                      Investors
How to open, maintain
and close an account                                  Share Classes

                                                      Opening an Account

                                                      Selling Service Shares and
                                                      Premier Shares

                                                 Account Policies and Other
                                                  Information

                                               Automatic Investment Arrangements

                                                Purchase and Redemption Minimums

                                                      Calculating Share Price

                                                    Timing of Purchase Requests

                                                      Tax Identification Number

                                               In-Kind Purchases and Redemptions

                                              Miscellaneous Purchase Information

                                      Timing of Redemption and Exchange Requests

                                            Miscellaneous Redemption Information

                                                     Exchange Privileges

                                                      Telephone Transactions

                                      Advance Notification of Large Transactions

                                      Making Changes to Your Account Information

                                                      Business Day

                                                      Early Closings

                                                      Authorized Intermediaries

                                                      Servicing Agents

                                                 Distributions and Taxes

                                                      Distributions

                                                      Taxes

                                                      Other Tax Information

                                                 Year 2000 Issues
________________________________________________________________________________

APPENDIX                              Additional Information on Portfolio Risks,
                                                  Securities and Techniques
_______________________________________________________________________________

FOR MORE                                     Statement of Additional Information
INFORMATION



          Northern  Institutional  Funds (the "Trust")  offers five money market
     portfolios  to  institutional  investors.  This  Prospectus  describes  the
     Municipal Portfolio (the "Portfolio"). Descriptions of the four other money
     market portfolios are described in separate prospectuses.  The Portfolio is
     authorized to offer three  classes of shares:  Shares,  Service  Shares and
     Premier Shares.  Shares are included in a separate prospectus.  The Trust's
     six fixed  income,  one  balanced  and  seven  equity  portfolios  are also
     described in separate prospectuses.

          The description on the following pages may help you determine  whether
     the Portfolio fits your investment  needs.  Keep in mind that the Portfolio
     can not guarantee it will meet its  investment  objective and it should not
     be relied upon as a complete investment program.

          The Portfolio  seeks to maintain a stable net asset value of $1.00 per
     share. Consistent with this policy, the Portfolio:

          o Limits its dollar-weighted  average portfolio maturity to 90 days or
     less;

          o Buys  securities  with  remaining  maturities  of 397  days  or less
     (except for certain  variable and floating rate  instruments and securities
     collateralizing  repurchase  agreements);   and  o  Invests  only  in  U.S.
     dollar-denominated securities that represent minimal credit risks.

          In  addition,  the  Portfolio  limits  its  investments  to  "Eligible
     Securities" as defined by the Securities and Exchange  Commission  ("SEC").
     Eligible  Securities  include,  generally,  securities that either (a) have
     short-term  debt ratings at the time of purchase in the two highest  rating
     categories  or (b) are  issued or  guaranteed  by, or  otherwise  allow the
     Portfolio to demand payment from, an issuer with those ratings.  Securities
     that are unrated  (including  securities of issuers that have long-term but
     not  short-term  ratings)  may  be  deemed  to be  Eligible  Securities  if
     determined to be of comparable  quality by The Northern Trust Company under
     the direction of the Board of Trustees.  Securities that are in the highest
     short-term rating category (and comparable  unrated  securities) are called
     "First Tier  Securities."  Securities in which the Portfolio may invest may
     not  earn  as  high a  level  of  income  as  long-term  or  lower  quality
     securities,  which generally have greater market risk and more  fluctuation
     in market value.

          In accordance  with current SEC  Regulations,  the Portfolio  will not
     invest  more  than 5% of the  value  of its  total  assets  at the  time of
     purchase in the securities of any single issuer. However, the Portfolio may
     invest up to 25% of its total assets in the  securities  of a single issuer
     for up to three  Business  Days.  These  limitations  do not apply to cash,
     certain repurchase agreements,  U.S. government securities or securities of
     other investment  companies.  In addition,  certain  securities  subject to
     unconditional   guarantees  and   securities   that  are  not  "First  Tier
     Securities" as defined by the SEC are subject to different  diversification
     requirements as described in the Statement of Additional Information.

          In addition to the instruments described in the table above and on the
     pages below, the Portfolio may use various investment techniques in seeking
     its  investment  objective.  You can learn more about these  techniques and
     related risks by reading the Appendix to this  Prospectus and the Statement
     of Additional Information.

                               RISK/RETURN SUMMARY

MUNICIPAL PORTFOLIO

INVESTMENT OBJECTIVE

          The  Portfolio  seeks to provide,  to the extent  consistent  with the
     preservation of capital and prescribed portfolio standards, a high level of
     income  exempt from regular  Federal  income tax by investing  primarily in
     municipal  instruments.  This objective may be changed without  shareholder
     approval.

PRINCIPAL INVESTMENT STRATEGIES

          The Portfolio seeks to achieve its objective by investing primarily in
     high-quality short-term  instruments,  the interest on which is exempt from
     regular Federal income tax ("municipal instruments"). These may include:

          - Fixed and variable rate notes and similar debt instruments;

          - Tax-exempt commercial paper;

          - Municipal bonds, notes, paper or other instruments; and

          - Municipal  bonds and notes which are  guaranteed as to principal and
          interest  or  backed  by  the  U.S.  government  or  its  agencies  or
          instrumentalities.

          Under normal  circumstances,  at least 80% of the  Portfolio's  annual
     gross  income will be derived  from  municipal  instruments.  Under  normal
     market  conditions,  uninvested  cash holdings and  investments  in taxable
     instruments  will not  exceed  20% of the value of the total  assets of the
     Portfolio.  During temporary defensive periods, however, all or any portion
     of the  Portfolio's  assets may be held  uninvested  or invested in taxable
     instruments.

          The  Portfolio  is not limited in the amount of its assets that may be
     invested in AMT  obligations  ("private  activity  bonds") the  interest on
     which may be treated as an item of tax preference to shareholders under the
     Federal alternative minimum tax. To the extent the Portfolio invests in AMT
     obligations,  some portion of the  Portfolio's  dividends may be subject to
     the alternative minimum tax.

PRINCIPAL INVESTMENT RISKS

          All investments  carry some degree of risk which will affect the value
     of the Portfolio's investments, investment performance, yield and the price
     of its shares.

          An investment in the Portfolio is not a deposit of any bank and is not
     insured or guaranteed by the Federal Deposit  Insurance  Corporation or any
     other government agency. Although the Portfolio seeks to preserve the value
     of your  investment  at $1.00 per share,  it is  possible  to lose money by
     investing in the Portfolio.

The following summarizes the principal risks that may affect the Portfolio.

          MONEY MARKET RISK is the risk that the  Portfolio  will not be able to
     maintain a net asset value per share of $1.00 at all times.

          INTEREST RATE RISK is the risk that during periods of rising  interest
     rates, the Portfolio's  yield (and the market value of its securities) will
     tend to be lower  than  prevailing  market  rates;  in  periods  of falling
     interest  rates,  the  Portfolio's  yield  (and  the  market  value  of its
     securities) will tend to be higher.

          CREDIT (OR  DEFAULT)  RISK is the risk that an issuer of fixed  income
     securities  held by the  Portfolio  may  default on its  obligation  to pay
     interest and repay principal.  Generally,  the lower the credit rating of a
     security, the greater the risk that the issuer of the security will default
     on its obligation.  High quality  securities are generally believed to have
     relatively low degrees of credit risk.

          PREPAYMENT (OR CALL) RISK is the risk that an issuer will exercise its
     right to pay principal on an obligation held by the Portfolio  earlier than
     expected.  This may happen  during a period of  declining  interest  rates.
     Under these circumstances, the Portfolio may be unable to recoup all of its
     initial  investment  and will  suffer  from  having  to  reinvest  in lower
     yielding  securities.  The  loss  of  higher  yielding  securities  and the
     reinvestment at lower interest rates can reduce the Portfolio's income.

          DEBT EXTENSION RISK is the risk that an issuer will exercise its right
     to pay  principal  on an  obligation  held  by the  Portfolio  (such  as an
     asset-backed security) later than expected. This may happen during a period
     of rising  interest  rates.  Under  these  circumstances,  the value of the
     obligation  will decrease and the Portfolio  will suffer from the inability
     to invest in higher yielding securities.

          CREDIT  ENHANCEMENT RISK is the risk that changes in credit quality of
     a  [U.S.  or  foreign]  bank[,   insurance   company]  or  other  financial
     institution could cause the Portfolio's investments in securities backed by
     letters  of  credit  or other  credit  enhancements  issued by such bank or
     institution to decline in value.

          MANAGEMENT  RISK is the risk that a  strategy  used by the  investment
     management team may fail to produce the intended results.

          LIQUIDITY  RISK is the risk that the Portfolio will not be able to pay
     redemption  proceeds on the same  Business  Day that  shares are  redeemed,
     because  of  unusual  market  conditions,   an  unusually  high  volume  of
     redemption requests or other reasons.

          YEAR 2000 RISK is the risk that the  Portfolio's  operations  or value
     will  be  adversely   affected  by  the  "Year  2000  Problem."  (For  more
     information, please see "Year 2000 Issues" on page __.)

          CONCENTRATION  RISK  is the  risk  that  the  Portfolio  may  be  more
     sensitive to an adverse economic,  business or political  development if it
     invests more than 25% of its assets in the municipal instruments of issuers
     in the same state, in municipal instruments the interest upon which is paid
     solely from  revenues of similar  projects,  or in  industrial  development
     bonds.

          TAX RISK is the risk that future legislative or administrative changes
     or court  decisions may  materially  affect the ability of the Portfolio to
     pay tax-exempt dividends.

          More  information  about the risks of  investing  in the  Portfolio is
     provided in the Appendix to this Prospectus.  You should carefully consider
     the risks  discussed in this section and the Appendix  before  investing in
     the Portfolio.

PORTFOLIO PERFORMANCE

          Since the Portfolio has less than one calendar year of performance, no
     performance information is provided.

PORTFOLIO FEES AND EXPENSES

          This table describes the fees and expenses that you may pay if you buy
     and hold Service Shares and Premier  Shares of the  Portfolio.  Please note
     that it does not reflect any charges  which may be imposed by The  Northern
     Trust Company,  its affiliates,  correspondent banks and other institutions
     on their Customers (as defined on page __). (For more  information,  please
     see "Account Policies and Other Information" on page __.)


                                                            Municipal Portfolio
<TABLE>
<CAPTION>
<S>     <C>                                                   <C>                        <C>

                                                              Service Shares             Premier Shares
SHAREHOLDER FEES (fees paid directly from your investment)
    Sales Charge (Load) Imposed on Purchases.................   None                      None
    Deferred Sales Charge (Load).............................   None                      None
    Sales Charge (Load) Imposed on Reinvested
    Distributions............................................   None                      None
    Redemption Fees..........................................   None                      None
    Exchange Fees............................................   None                      None

                                                                Service Shares            Premier Shares
ANNUAL PORTFOLIO OPERATING EXPENSES
(expenses that are deducted from Portfolio assets)1
    Management Fees2.........................................   0.25%                     0.25%
    Distribution (12b-1) Fees................................   None                      None
    Servicing Agent Fees.....................................   0.25%                     0.50%
    Transfer Agency Fees.....................................   0.01%                     0.02%
    Other Expenses3..........................................   0.22%                     0.22%
    Total Annual Portfolio Operating Expenses4...............   0.73%                     0.99%
</TABLE>

          1 The Portfolio's  annual operating  expenses are based on actual fees
          and estimated expenses for the current fiscal year.

          2 As of the  date of  this  Prospectus,  the  Northern  Trust  Company
          ("Northern")  is voluntarily  waiving a portion of its management fees
          for the Portfolio.  As a result of the fee waiver,  actual  management
          fees to be paid by the Portfolio are 0.10% of the Portfolio's  average
          daily net assets.  Fee waivers  may be  terminated  at any time at the
          option of Northern.

          3 "Other  Expenses"  include  (1)  administration  fees and all  other
          ordinary  operating expenses of the Portfolio not listed above and (2)
          the payment of a fee to Northern or other institutions under a Service
          Plan  equal to 0.08%  of the  average  daily  net  asset  value of the
          Service  Shares and  Premier  shares for  systems  support and related
          services.  Northern  and First  Data  Investor  Services  Group,  Inc.
          ("First  Data  Investor  Services  Group")  as  co-administrators  are
          entitled to a  co-administration  fee from the  Portfolio at an annual
          rate of  0.10%  of the  Portfolio's  average  daily  net  assets.  The
          co-administrators  have agreed to reimburse  expenses  (including fees
          payable  to  Northern  and  First  Data  Investor  Services  Group  as
          co-administrators,  but excluding  management  fees,  transfer  agency
          fees,  fees paid under the Service Plan for Service Shares and Premier
          Shares and extraordinary expenses) which exceed on an annualized basis
          0.10% of the Portfolio's  average daily net assets. As a result of the
          expense reimbursement,  estimated "Other Expenses" are currently 0.18%
          of the Portfolio's average daily net assets.

          4 As a result of the fee waivers and expense reimbursements, estimated
          actual total annual operating  expenses for the Portfolio is set forth
          below.  Fee  waivers  (and  voluntary   expense   reimbursements,   if
          applicable)  may be  terminated at any time at the option of Northern.
          If this  occurs,  "Other  Operating  Expenses"  may  increase  without
          shareholder approval.

                                      Total Annual Portfolio Operating Expenses
         Municipal Portfolio
                  Service Shares                              0.54%
                  Premier Shares                              0.80%

EXAMPLE

     The following Example is intended to help you compare the cost of investing
in the Portfolio (without fee waivers and expense  reimbursements) with the cost
of investing in other mutual funds.

     The Example  assumes that you invest  $10,000 in the Portfolio for the time
periods  indicated (with  reinvestment of all dividends and  distributions)  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 Portfolio's
operating expenses remain the same.  Although your actual costs may be higher or
lower, based on these assumptions your costs would be:



                                        1 Year        3 Years
MUNICIPAL PORTFOLIO

         SERVICE SHARES                  $75           $233

         PREMIER SHARES                  $101          $315



                           MANAGEMENT OF THE PORTFOLIO

Investment Adviser

     The Northern Trust Company  ("Northern" or the  "Investment  Adviser"),  an
Illinois  state-chartered bank and member of the Federal Reserve System,  serves
as investment adviser for the Portfolio. The Investment Adviser is located at 50
South LaSalle Street,  Chicago,  Illinois 60675 and is a wholly-owned subsidiary
of Northern Trust Corporation, a bank holding company. As of September 30, 1999,
Northern Trust Corporation and its subsidiaries had approximately  $____ billion
in assets, $____ billion in deposits and employed over _____ persons.

     Northern and its affiliates  administrated in various capacities (including
as master trustee, investment manager or custodian) approximately $____ trillion
of assets as of September  30,  1999,  including  approximately  $___ billion of
assets  for  which  Northern  and  its  affiliates  had  investment   management
responsibility.  Under its Advisory  Agreement  with the Trust,  the  Investment
Adviser, subject to the general supervision of the Trust's Board of Trustees, is
responsible  for making  investment  decisions for the Portfolio and for placing
purchase and sale orders for portfolio securities.

Advisory Fees

     As  compensation  for its advisory  services and its  assumption of related
expenses,  the  Investment  Adviser  is  entitled  to an  advisory  fee from the
Portfolio,  computed daily and payable monthly, at an annual contractual rate of
0.25% (expressed as a percentage of the Portfolio's average daily net assets).

     The difference, if any, between the contractual advisory fee and the actual
advisory fee that is paid by the  Portfolio  will  reflect  that the  Investment
Adviser  did not  charge  the full  amount of the  advisory  fee to which it was
entitled.  The  Investment  Adviser  may  discontinue  or modify  its  voluntary
limitation in the future at its discretion.

Portfolio Management

     The Investment Adviser employs a team approach to the investment management
of the Portfolio,  relying upon investment professionals under the leadership of
James M.  Snyder,  Chief  Investment  Officer and  Executive  Vice  President of
Northern.  Mr. Snyder  oversees the  management of all fixed income,  equity and
money  market  assets  managed by the  Investment  Adviser.  Mr.  Snyder  joined
Northern Trust in 1980.

Other Portfolio Services

     Northern also serves as transfer agent ("Transfer Agent") and custodian for
the Portfolio.  As Transfer  Agent,  Northern  performs  various  administrative
servicing functions, and any shareholder inquiries should be directed to it. The
fees that Northern  receives for its services in those  capacities are described
in the  Statement  of  Additional  Information.  In  addition,  Northern and its
affiliates,  banks, trust companies and other institutions and organizations may
enter into agreements for the provision of  administrative  support services for
the Service Share and Premier Share investors.  Northern and other  institutions
may provide consulting, technology and systems support services and receive fees
relating to cash  management  or sweep  account  services  under a Service  Plan
described under "Account  Policies and Other  Information - Servicing Agents" on
page ___.

     Northern and First Data Investor Services Group, Inc. ("First Data Investor
Services"),  a  wholly-owned  subsidiary  of First  Data  Corporation,  serve as
co-administrators for the Portfolio.  First Data Distributors,  Inc. ("FDDI"), a
subsidiary  of First  Data  Investor  Services,  serves as  distributor  for the
Portfolio.  The fees that Northern and First Data Investor  Services receive for
their services in these  capacities  are described on page ___ under  "Portfolio
Fees and Expenses."  FDDI does not receive any  compensation  from the Trust for
its distribution services.

PURCHASING AND SELLING SERVICE SHARES AND PREMIER SHARES
________________________________________________________________________

Investors

     Institutional investors,  which are acting on their own behalf or on behalf
of their customers,  clients,  employees,  participants and others ("Customers")
and have  agreed to provide (or arrange  for the  provision  of)  administrative
support (and, for Premier  Shares,  shareholder  liaison  services) to Customers
under a servicing agreement with the Trust ("Servicing  Agreement"),  may invest
in the  Service  Shares  and  Premier  Shares  of the  Portfolio  through  their
institutional  accounts  at Northern or an  affiliate.  They may also  establish
accounts  directly  with  the  Trust.  There  is  no  sales  charge  imposed  on
investments. Institutional investors ("Institutions") include:

          Northern and its affiliates;

          Defined  contribution  plans  having at least $30 million in assets or
          annual contributions of at least $5 million; and

          Other           institutions          and          organizations.
________________________________________________________________________

Share Classes

     The Portfolio  offers three classes of shares:  Shares,  Service Shares and
Premier Shares. Shares are described in a separate prospectus.

     Shares of each class bear their pro rata portion of all operating  expenses
paid by the Portfolio,  except  amounts  payable under the Service Plan that has
been adopted for the Portfolio's  Service Shares and Premier Shares and transfer
agency fees. Because of these  class-specific  expenses,  the performance of the
Shares of the  Portfolio is expected to be higher than the  performance  of both
the Service  Shares and Premier Shares and the  performance  of the  Portfolio's
Service  Shares is  expected to be higher  than the  performance  of the Premier
Shares.
________________________________________________________________________

Opening An Account

     You may purchase Service Shares and Premier Shares of the Portfolio through
your  institutional  account at Northern  (or an  affiliate)  or you may open an
account directly with the Trust with a minimum initial  investment of $5 million
in one or more portfolios of the Trust. This minimum does not apply, however, to
Service  Shares and  Premier  Shares  purchased  through a  Northern  cash sweep
program. There is no minimum for subsequent investments.

     Through an  Institutional  Account.  If you are  opening  an  institutional
account at Northern, a Northern representative can assist you with all phases of
your  investment.  To purchase  Service  Shares or Premier  Shares  through your
account, contact your Northern representative for further information.

     Directly from the Trust. An Institution may open a shareholder  account and
purchase  Service Shares and Premier Shares directly from the Trust as described
in                               this                                Prospectus.
________________________________________________________________________

By Mail.

Read this Prospectus carefully.

Complete and sign the new account application.

Include a certified  corporate  resolution (or other acceptable evidence of
authority).

Enclose a check or Federal Reserve draft payable to the Portfolio.

Mail your check, corporate resolution and completed application to:

        Northern Institutional Funds
        c/o The Northern Trust Company
        P.O. Box 75943
        Chicago, Illinois 60675-5943

     All checks must be payable in U.S.  dollars and drawn on a bank  located in
the  United   States.   Cash  and  third  party   checks  are  not   acceptable.
________________________________________________________________________

By Telephone.

Read this Prospectus carefully.

Call the Transfer Agent at 1-800-637-1380.

To open a new account please provide:

     o The name of the Portfolio in which you'd like to invest

     o The number of Service Shares or Premier Shares or dollar amount
          to be invested

     o The method of payment

To add to an existing account, please provide:

     o The Institution's name

     o Your Account Number

By Wire or Automated Clearing House Transfer ("ACH Transfer").

To open a new account:

Call the Transfer Agent at 1-800-637-1380 for instructions.

     For more  information  about the  purchase  of  Service  Shares or  Premier
Shares, call the Transfer Agent at 1-800-637-1380.

To add to an existing account:

Have your bank wire Federal funds or effect an ACH Transfer to:

        The Northern Trust Company
        Chicago, Illinois
        ABA Routing No. 0710-00152
        (Reference 10 Digit Portfolio Account No.)
        (Reference Shareholder's Name)
________________________________________________________________________

Selling Service Shares and Premier Shares

     Through an  Institutional  Account.  Institutions may sell (redeem) Service
Shares and Premier  Shares  through  their  institutional  account by contacting
their Northern account representative.

     Directly through the Trust.  Institutions  that purchase Service Shares and
Premier  Shares  directly  from the Trust may redeem  their  Service  Shares and
Premier Shares through the Transfer Agent in one of the following ways:

By Mail.

Send a written request to:

        Northern Institutional Funds
        c/o The Northern Trust Company
        P.O. Box 75943
        Chicago, Illinois 60675-5943

The letter of instruction must include:

      o The signature of a duly authorized person

      o Your account number

      o The name of the Portfolio

      o The  number of Service  Shares or Premier  Shares or the dollar
               amount to be redeemed

By Telephone.

      Call the Transfer Agent at 1-800-637-1380 for instructions.

      During periods of unusual economic or market activity,  telephone
       redemptions  may  be  difficult  to  implement.  In  such  event,
       shareholders  should follow the  procedures  outlined above under
      "Selling Service Shares and Premier Shares By Mail."

By Wire.

      Call the Transfer Agent at 1-800-637-1380 for instructions.

      You must have given authorization for expedited wire redemption.

      The minimum amount that may be redeemed by this method is $10,000.

Account Policies and Other Information

     Automatic Investment Arrangements. Institutions may purchase Service Shares
and Premier Shares through their  institutional  accounts at Northern  either by
directing automatic investment of cash balances in excess of certain agreed upon
amounts or by directing  investments from time to time on a non-automatic basis.
Northern will place a purchase  order  generated  under an automatic  investment
direction  either on the Business Day that funds are available in the account or
on the next Business Day,  depending upon the terms of the automatic  investment
arrangement.  Similarly,  Northern will place a redemption order generated under
an automatic investment direction either on the Business Day Northern calculates
the redemption  amount needed to bring the account balance up to the agreed upon
amount or on the next  Business Day,  depending  upon the terms of the automatic
investment  arrangement.  If a redemption  order is placed on the next  Business
Day,  Northern  will  normally  provide  funds by  provisionally  crediting  the
Institution's  account on the day the calculation is made.  Institutions  should
contact  Northern  for  more  information   about  their  automatic   investment
arrangements.

     Purchase and Redemption Minimums.  There is a minimum initial investment of
$5 million in one or more other investment portfolios of the Trust. This minimum
does not apply, however, to Service Shares or Premier Shares purchased through a
Northern cash sweep program. There is no minimum for subsequent  investments.  A
$10,000 minimum applies for redemptions by wire. The Trust reserves the right to
waive  purchase and  redemption  minimums and to determine the manner in which a
minimum is satisfied.

     Calculating  Share Price.  The Trust issues and redeems  Service Shares and
Premier Shares at net asset value  ("NAV").  The NAV for each share class of the
Portfolio is calculated  by dividing the value of net assets  attributed to that
class  by the  number  of  outstanding  shares  of the  class.  The  NAV for the
Portfolio and class is calculated as of 3:00 p.m.,  Chicago time,  each Business
Day. The NAV used in  determining  the price of your Service  Shares and Premier
Shares is the one calculated  after your purchase,  exchange or redemption order
is received or accepted as described below.

     The  Portfolio  seeks to  maintain an NAV of $1.00 per share by valuing the
obligations  held by it at amortized  cost in accordance  with SEC  regulations.
Amortized cost will normally approximate market value.

     Timing of Purchase  Requests.  Requests  accepted by the Transfer  Agent or
other  authorized  intermediary by 1:00 p.m.,  Chicago time, on any Business Day
will be executed the same day, provided that either:

     o The  Transfer  Agent  receives  the  purchase  price in  Federal or other
     immediately  available  funds prior to 1:00 p.m.,  Chicago  time,  the same
     Business Day;

     o The order is accepted by an authorized  intermediary and payment is to be
     made by the close of the same Business Day in Federal or other  immediately
     available funds according to procedures authorized by the Trust; or

     o Payment in Federal or other  immediately  available  funds is received by
     the close of the same Business Day in an institutional  account  maintained
     with Northern or an affiliate.

     Orders received by the Transfer Agent or other authorized intermediary on a
non-Business  Day or after 1:00 p.m.,  Chicago  time,  on a Business Day will be
executed on the next Business Day, provided that payment is made as noted above.
We consider  requests  to be in "good  order" when all  required  documents  are
properly  completed,  signed  and  received,  including  a  certified  corporate
resolution or other acceptable evidence of authority. If an Institution pays for
Service Shares or Premier Shares by check,  Federal funds  generally will become
available within two Business Days after a purchase order is received.

     If  payment  is  not  received  as  described   above  from  an  authorized
intermediary  on  the  same  Business  Day  of  acceptance  of an  order  by the
authorized intermediary,  the authorized intermediary may be liable for fees and
losses and the transaction may be cancelled.

     In certain circumstances,  the Trust may advance the time by which purchase
orders must be received. See "Early Closings" on page __.

     Tax Identification  Number.  Federal  regulations require you to provide to
the Transfer  Agent a taxpayer  identification  number when you open an account.
Purchase  orders  without such a number or an indication  that a number has been
applied for will not be  accepted.  If you have  applied for a number,  you must
provide it to the Transfer Agent within 60 days of the date of the order.

     In-Kind  Purchases and Redemptions.  The Trust reserves the right to accept
payment for Service Shares and Premier Shares in the form of securities that are
permissible investments for the Portfolio.  The Trust also reserves the right to
pay redemptions by a distribution "in-kind" of securities (instead of cash) from
the  Portfolio.   See  the  Statement  of  Additional  Information  for  further
information about the terms of these purchases and redemptions.

Miscellaneous Purchase Information.

     o Institutions  are  responsible  for  transmitting  purchase orders to the
     Transfer Agent and delivering required funds on a timely basis.

     o Institutions are responsible for all losses and expenses of the Portfolio
     in the event of any failure to make  payment  according  to the  procedures
     outlined in this Prospectus. Northern may redeem shares from any account it
     maintains to protect the Portfolio and Northern  against loss. In addition,
     a $20 charge will be imposed if a check does not clear.

     o Service  Shares and Premier  Shares of the  Portfolio are entitled to the
     dividends  declared by the  Portfolio  beginning  on the  Business  Day the
     purchase  order  is  executed,   provided   payment  in  Federal  or  other
     immediately  available  funds is received by the Transfer Agent by the time
     designated above.

     o The Trust reserves the right to reject any purchase order. The Trust also
     reserves the right to change or discontinue any of its purchase procedures.

     Timing  of  Redemption  and  Exchange  Requests.  Redemption  and  exchange
requests  will be effected  at the NAV next  determined  after your  exchange or
redemption  order is received  in good order.  Good order means that the request
includes the following: the account number and Portfolio name; the amount of the
transaction  (as  specified in dollars or shares);  and the  signature of a duly
authorized  person  (except for  telephone and wire  redemptions).  See "Account
Policies and Other Information -- Making Changes to Your Account Information."

     If  either  the  Transfer   Agent  or  Northern   (with   respect  to  your
institutional  account) receives a redemption order by 1:00 p.m.,  Chicago time,
on a Business Day, redemption proceeds will normally be paid in Federal funds or
other  immediately  available  funds wired or sent by check to you or, if you so
choose, to your institutional account with Northern, on the same Business Day.

     Redemption orders received after 1:00 p.m.,  Chicago time, will be effected
the next Business Day. Proceeds for redemption orders received on a non-Business
Day will normally be sent on the next Business Day after receipt in good order.

     In  certain  circumstances,  the  Trust  may  advance  the  time  by  which
redemption and exchange  orders must be received.  See "Early  Closings" on page
__.

     Miscellaneous Redemption Information.  All redemption proceeds will be sent
by check unless the Transfer Agent is directed  otherwise.  Redemption  proceeds
may also be wired.  A redemption  request may not be processed if a  shareholder
has failed to submit a completed and properly executed new account  application,
including a corporate resolution or other acceptable evidence of authority.

     o The  Trust  reserves  the  right to defer  crediting,  sending  or wiring
     redemption  proceeds for up to 7 days after receiving the redemption  order
     if,  in its  judgment,  an  earlier  payment  could  adversely  affect  the
     Portfolio.

     o If you are redeeming recently purchased Service Shares or Premier Shares,
     your  redemption  request may not be honored until your check or electronic
     transaction has cleared. This may delay your transaction for up to 15 days.

     o Institutions  are responsible for transmitting  redemption  orders to the
     Transfer  Agent and crediting  their  Customers'  accounts with  redemption
     proceeds on a timely basis.

     o  Redemption  requests  by mail must be signed by a person  authorized  by
     acceptable documentation on file with the Transfer Agent.

     o Dividends  on Service  Shares and Premier  Shares are earned  through and
     including the day prior to the day on which they are redeemed.

     o The Trust  reserves the right to redeem Service Shares and Premier Shares
     held by any  shareholder  who  provides  incorrect  or  incomplete  account
     information  or when such  involuntary  redemptions  are necessary to avoid
     adverse consequences to the Trust and its shareholders.

     o The Trust may require any information reasonably necessary to ensure that
     a redemption request has been duly authorized.

     o The  Trust  reserves  the  right  to  change  or  discontinue  any of its
     redemption procedures.

     Exchange  Privileges.  Institutions  and  their  Customers  (to the  extent
permitted by their account  agreements) may exchange  Service Shares and Premier
Shares of the Portfolio for Service Shares and Premier Shares, respectively,  of
another portfolio. The registration of both accounts involved must be identical.
A $1,000 minimum investment  applies.  An exchange is a redemption of shares you
own and the  purchase of shares you are  acquiring.  It is  considered a taxable
event and may result in a gain or loss.

     The  Trust  reserves  the  right to  change  or  discontinue  the  exchange
privilege at any time upon 60 days' written notice to shareholders and to reject
any exchange  request.  Exchanges are only available in states where an exchange
can legally be made.  Before  making an exchange you should read the  prospectus
for the shares you are acquiring.

     Telephone  Transactions.  For your  protection,  telephone  requests may be
recorded in order to verify their accuracy. In addition,  the Transfer Agent has
adopted  procedures  in an effort to  establish  reasonable  safeguards  against
fraudulent  telephone  transactions.  If reasonable measures are taken to verify
that telephone  instructions  are genuine,  the Trust and its service  providers
will not be responsible  for any loss resulting from  fraudulent or unauthorized
instructions received over the telephone.  In these circumstances,  shareholders
will bear the risk of loss.  During periods of unusual market activity,  you may
have trouble  placing a request by telephone.  In this event,  consider  sending
your request in writing.

     The proceeds of  redemption  orders  received by telephone  will be sent by
check,  wire or transfer  according to proper  instructions.  All checks will be
made payable to the  shareholder of record and mailed only to the  shareholder's
address of record.

     The Trust reserves the right to refuse a telephone redemption.

     Advance  Notification  of Large  Transactions.  The Trust  requests that an
Institution  give advance  notice to the Transfer  Agent by 11:00 a.m.,  Chicago
time,  if it intends to place a purchase  or  redemption  order of $5 million or
more on a Business Day.

     Making Changes to Your Account Information.  You may make changes to wiring
instructions,  address of record, or other account  information only in writing.
These  instructions  must be  accompanied by a certified  corporate  resolution,
signature  guarantee  from an  institution  participating  in the Stock Transfer
Agency Medallion Program ("STAMP"),  or other acceptable  evidence of authority.
In accordance  with SEC  regulations,  the Trust and Transfer Agent may charge a
shareholder reasonable costs in locating a shareholder's current address.

     Business Day. A "Business  Day" is each Monday through Friday when Northern
or the New York Stock  Exchange is open for business.  A "Business Day" does not
include a holiday observed by Northern and the Exchange.  In 1999 these holidays
are: New Year's Day, Martin Luther King, Jr. Day, Presidents' Day, Memorial Day,
Independence Day, Labor Day, Thanksgiving and Christmas Day.

     Early  Closings.  The Portfolio  reserves the right to cease, or to advance
the time  for,  accepting  purchase,  redemption  or  exchange  orders  for same
Business Day credit when  Northern or the  Exchange  closes early as a result of
unusual weather or other  conditions.  It also reserves this right when The Bond
Market Association recommends that securities markets close or close early.

     Authorized  Intermediaries.  The  Trust  may  authorize  certain  financial
intermediaries  (including  banks,  trust  companies,   brokers  and  investment
advisers),  which provide  recordkeeping,  reporting and processing services, to
accept  purchase,  redemption and exchange orders from their Customers on behalf
of the  Trust.  They may also  designate  other  intermediaries  to accept  such
orders, if approved by the Trust. Authorized  intermediaries are responsible for
transmitting  orders and delivering  funds on a timely basis. The Portfolio will
be deemed to have received an order when the order is accepted by the authorized
intermediary  on a Business Day, and the order will be priced at the Portfolio's
per share NAV next determined.

     Servicing  Agents.  Institutions  perform  (or  arrange to have  performed)
various  administrative  support  services for customers who are the  beneficial
owners of either Service Shares or Premier Shares through  Servicing  Agreements
with the Trust  ("Servicing  Agents").  In  addition,  institutions  perform (or
arrange to have performed)  account  maintenance  services under their Servicing
Agreements for Premier Shares.  These  Servicing  Agreements are permitted under
the Trust's Service Plan ("Service  Plan").  For both Service Shares and Premier
Shares, these services may include:

     establishing and maintaining individual accounts and records;

     processing purchase, redemption and exchange orders;

     placing net  purchase and  redemption  orders with  Northern  acting as the
     Trust's Transfer Agent; and

     providing  cash  management  or sweep  accounts  and similar  programs  and
     services.

     Servicing Agents will receive fees from the Portfolio for these services at
an  annual  rate of up to 0.25% of the  average  daily  net  asset  value of the
Service Shares and Premier Shares beneficially owned by their Customers.

     Personal and account  maintenance  services provided under the Service Plan
for Premier Shares may include:

     providing  information to investors  regarding the Portfolio or relating to
     the status of their accounts; and

     acting as liaison between investors and the Trust.

     Servicing Agents will receive  additional fees from the Portfolio for these
services at an annual  rate of up to 0.25% of the average  daily net asset value
of Premier Shares beneficially owned by their Customers.

     The Service Plan also  provides for the payment of fees to Northern,  First
Data Investor  Services Group or other  Institutions  at an annual rate of up to
0.08% of the average daily net asset value of Service  Shares and Premier Shares
serviced by Institutions for ongoing consulting,  technology and systems support
services relating to cash management or sweep account services. All fees payable
under the Service Plan are borne solely by the share class to which the services
are provided and not by the Portfolio's other share classes.

     Northern may provide  additional  compensation to certain dealers and other
financial  intermediaries  who provide services to their Customers who invest in
the Trust or whose Customers purchase  significant  amounts of Service Shares or
Premier Shares of the Portfolio.  The amount of such compensation may be made on
a one-time  and/or  periodic  basis,  and may  represent all or a portion of the
annual fees earned by Northern as Investment Adviser (after  adjustments).  This
compensation  will be paid by Northern or its  affiliates and will not represent
an additional expense to the Trust or its shareholders.

     You should read your account  agreement  with your  Institution  carefully.
Your Institution's requirements may differ from those listed in this Prospectus.
An  Institution  may impose  account  charges,  such as asset  allocation  fees,
account  maintenance  fees, and other charges that will reduce the net return on
an investment in the Portfolio. If you have agreed to maintain a minimum balance
with your  Institution  and the  balance  falls below this  minimum,  you may be
required to redeem all or a part of your investment in the Portfolio.

     Conflict of interest  restrictions may apply to the receipt of compensation
from the Trust by an Institution in connection  with the investment of fiduciary
funds in Service  Shares or  Premier  Shares of the  Portfolio.  Banks and other
institutions  regulated by the Office of Comptroller  of the Currency,  Board of
Governors  of the Federal  Reserve  System and state  banking  commissions,  and
investment  advisers and other money managers subject to the jurisdiction of the
SEC,  the  Department  of Labor or state  securities  commissions,  are urged to
consult legal counsel before entering into Servicing Agreements.

     State securities laws regarding the registration of dealers may differ from
Federal law. As a result,  Institutions  investing in the Portfolio on behalf of
their Customers may be required to register as dealers.

DISTRIBTIONS AND TAXES

DISTRIBUTIONS

     Dividends  from net  income  are  declared  daily and paid  monthly  by the
Portfolio to its  shareholders.  Net income includes the interest accrued on the
Portfolio's  assets  less  estimated  expenses.  The  Portfolio's  net  realized
short-term  capital  gains,  if any,  are  distributed  at least  annually.  The
Portfolio does not expect to realize net long-term capital gain.

     Dividends  are paid as soon as practical  following  the end of each month,
except in the case of a total  redemption of Service Shares or Premier Shares in
an  account  that  is not  subject  to a  standing  order  for the  purchase  of
additional  shares of the same  class.  In that  event,  dividends  will be paid
promptly along with the redemption proceeds.

     All  distributions  are paid by the Portfolio in cash or are  automatically
reinvested  (without any sales charge) in additional  Service  Shares or Premier
Shares of the Portfolio, respectively. You may make arrangements to credit these
distributions to your account with Northern, its affiliates or its correspondent
banks.

There are no fees or sales charges on reinvestments.

TAXES

     The  Portfolio  intends to qualify as a  regulated  investment  company for
Federal tax purposes, and to distribute to shareholders substantially all of its
net investment  income and net capital gain.  There are certain tax requirements
that the  Portfolio  must  follow  in order to avoid  Federal  taxation.  In its
efforts to adhere to these  requirements,  the  Portfolio  may have to limit its
investment activity in some types of instruments.

     The Portfolio expects to pay "exempt-interest dividends" that are generally
exempt  from   regular   Federal   income  tax.   However,   a  portion  of  the
exempt-interest  dividends  paid  by  the  Portfolio  will  be an  item  of  tax
preference  for  purposes  of  determining   Federal   alternative  minimum  tax
liability.  Exempt-interest  dividends will also be considered  along with other
adjusted  gross income in  determining  whether any Social  Security or railroad
retirement payments received by you are subject to Federal income taxes.

     If you receive an  exempt-interest  dividend  with respect to any share and
the share is held for six months or less,  any loss on the sale or  exchange  of
the share will be disallowed to the extent of the dividend  amount.  Interest on
indebtedness  incurred  by a  shareholder  to  purchase  or carry  shares of the
Portfolio generally will not be deductible for federal income tax purposes.

     Except as stated  below,  you may be  subject  to state and local  taxes on
Portfolio  distributions  and  redemptions.  State  income  taxes may not apply,
however,  to the portions of the  Portfolio's  distributions,  if any,  that are
attributable  to interest on certain types of Federal  securities or interest on
securities issued by the particular state or municipalities within the state.

     In all cases,  distributions,  if any,  derived from net long-term  capital
gains will  generally  be taxable to you as  long-term  capital  gains,  and any
dividends derived from short-term capital gains and taxable interest income will
be taxable to you as ordinary income.

OTHER TAX INFORMATION

     Dividends and distributions from the Portfolio will generally be reportable
by you in the tax year in which they are paid, with one exception. Dividends and
distributions  declared by the  Portfolio  in October,  November or December and
paid in January are taxed as though they were paid by December 31.

     Every year,  the Trust will send you  information  detailing  the amount of
ordinary  income and capital gains  distributed to your account for the previous
year.

     Your investment in the Portfolio  could have  additional tax  consequences.
You should consult your tax professional  for information  regarding all the tax
consequences applicable to your investment in the Portfolio. More information is
provided in the Statement of Additional  Information.  This short summary is not
intended as a substitute for careful tax planning.

     Dividends  paid by the Portfolio may be taxable under state or local law as
dividend  income even though all or a portion of such  dividends  may be derived
from interest on obligations which, if realized  directly,  would be exempt from
such income taxes.

Year 2000 Issues

     Like  every  other  business   dependent  upon   computerized   information
processing,  Northern Trust Corporation  ("Northern Trust") must deal with "Year
2000" issues.

     Many computer systems use two digits rather than four to identify the year.
Unless adapted,  these systems may not be able to correctly distinguish the Year
2000 from the Year 1900. As the Year 2000 approaches, many systems may be unable
to  accurately  process  certain  date-based  information,  which  could cause a
variety  of  operational  problems  for  businesses.  This could have a negative
effect on the  companies in which the Portfolio  invests,  thus  decreasing  the
Portfolio's investment returns.

     Northern  Trust has  implemented  steps to prepare  its  critical  computer
systems and processes for Year 2000  processing.  It has established a dedicated
Year 2000 Project Team whose members have  significant  systems  development and
maintenance   experience.   Northern   Trust's  Year  2000  project  includes  a
comprehensive  testing plan of its critical systems.  Northern Trust has advised
the Trust that it has  substantially  completed work on its critical systems and
that testing with outside parties will be conducted during 1999.

     Northern  Trust  also has a program to  monitor  and assess the  efforts of
other parties,  such as other service  providers to the Portfolio.  However,  it
cannot control the success of those other parties'  efforts.  Contingency  plans
are being  established to provide Northern Trust with alternatives in case these
entities  experience  significant  Year 2000  difficulties  that impact Northern
Trust.

     Furthermore,  even if the actions taken by Northern  Trust are  successful,
the  normal  operations  of the  Portfolio  may,  in  any  event,  be  disrupted
significantly  by the failure of  communications  and public utility  companies,
governmental entities,  financial processors or others to perform their services
as a result of Year 2000 problems.


                                    APPENDIX

ADDITIONAL INFORMATION ON PORTFOLIO RISKS, SECURITIES AND TECHNIQUES

     This  Appendix  takes a closer look at some of the types of  securities  in
which the  Portfolio may invest and their  related  risks.  It also explores the
various  investment  techniques that the investment  management team may, but is
not required  to, use.  The  Portfolio  may invest in other  securities  and are
subject to further  restrictions  and risks which are described in the Statement
of Additional Information.

     ASSET-BACKED SECURITIES.  Asset-backed securities are sponsored by entities
such as  government  agencies,  banks,  financial  companies  and  commercial or
industrial companies.  Asset-backed  securities represent  participations in, or
are secured by and payable  from,  pools of various  types of real and  personal
property and other financial  assets.  Such asset pools are securitized  through
the use of privately formed trusts or special purpose corporations.  Payments or
distributions  of principal and interest may be guaranteed up to certain amounts
and for a certain time period by a letter of credit or a pooled insurance policy
issued by a financial institution, or other credit enhancements.

     INVESTMENT   STRATEGY.   The  Portfolio  may  purchase   various  types  of
     asset-backed  securities  that are "Eligible  Securities" as defined by the
     SEC.

     SPECIAL  RISKS.  In  addition  to  credit  and  market  risk,  asset-backed
     securities  involve  prepayment risk because the underlying  assets (loans)
     may be prepaid at any time.  The value of these  securities may also change
     because  of actual or  perceived  changes  in the  creditworthiness  of the
     originator,  the servicing agent, the financial  institution  providing the
     credit support,  or the counterparty.  Like other fixed income  securities,
     when interest rates rise, the value of an asset-backed  security  generally
     will  decline.  However,  when  interest  rates  decline,  the  value of an
     asset-backed  security with prepayment features may not increase as much as
     that  of  other  fixed  income   securities.   In  addition,   non-mortgage
     asset-backed   securities   involve   certain   risks  not   presented   by
     mortgage-backed  securities.  Primarily,  these securities may not have the
     benefit of the same security interest in the underlying collateral.

     BORROWINGS  AND REVERSE  REPURCHASE  AGREEMENTS.  The  Portfolio may borrow
money from banks and may enter into reverse repurchase agreements with banks and
other financial institutions.  Reverse repurchase agreements involve the sale of
money  market  securities  held by the  Portfolio  subject to its  agreement  to
repurchase them at a mutually agreed upon date and price (including interest).

     INVESTMENT  STRATEGY.  The  Portfolio  may borrow  and enter  into  reverse
     repurchase  agreements  in amounts  not  exceeding  one-third  of its total
     assets (including the amount borrowed).  These  transactions may be entered
     into as a temporary  measure for emergency  purposes or to meet  redemption
     requests.  Reverse repurchase  agreements may also be entered into when the
     investment  management  team expects that the interest  income to be earned
     from the  investment of the  transaction  proceeds will be greater than the
     related interest expense.

     SPECIAL  RISKS.   Borrowings  and  reverse  repurchase  agreements  involve
     leveraging.  If the securities held by the Portfolio decline in value while
     these transactions are outstanding,  the net asset value of the Portfolio's
     outstanding shares will decline in value by  proportionately  more than the
     decline  in  value  of the  securities.  In  addition,  reverse  repurchase
     agreements  involve  the  risks  that the  interest  income  earned  by the
     Portfolio  (from  the  investment  of the  proceeds)  will be less than the
     interest  expense  of  the  transaction,  that  the  market  value  of  the
     securities sold by the Portfolio will decline below the price the Portfolio
     is obligated to pay to repurchase the  securities,  and that the securities
     may not be returned to the Portfolio.

     DERIVATIVES. The Portfolio may purchase certain "derivative" instruments. A
derivative  is a financial  instrument  whose value is derived  from -- or based
upon -- the  performance  of  underlying  assets,  interest  rates,  or indices.
Derivatives include structured debt obligations such as asset-backed securities,
"stripped" securities and various floating rate instruments.

     INVESTMENT  STRATEGY.  The Portfolio will invest in derivatives only if the
     potential risks and rewards are consistent with the Portfolio's  objective,
     strategies and overall risk profile.

     SPECIAL RISKS. Engaging in derivative  transactions involves special risks,
     including (a) market risk that the  Portfolio's  derivatives  position will
     lose value;  (b) credit risk that the  counterparty to the transaction will
     default;  (c) leveraging  risk that the value of the derivative  instrument
     will  decline  more than the value of the assets on which it is based;  (d)
     illiquidity  risk that the  Portfolio  will be unable to sell its  position
     because of lack of market  depth or  disruption;  (e) pricing risk that the
     value of a derivative  instrument  will be difficult to determine;  and (f)
     operations  risk that loss will occur as a result of inadequate  systems or
     human error.  Many types of  derivatives  have been recently  developed and
     have not been tested over complete  market cycles.  For these reasons,  the
     Portfolio  may suffer a loss whether or not the analysis of the  investment
     management team is accurate.

     DOWNGRADED  SECURITIES.  After its purchase,  the portfolio security may be
assigned a lower rating or cease to be rated. If this occurs,  the Portfolio may
continue to hold the issue if the Investment  Adviser believes it is in the best
interest of the Portfolio and its shareholders.

     ILLIQUID OR RESTRICTED  SECURITIES.  Illiquid  securities  include  certain
variable  amount master demand notes that cannot be called within seven days and
other  securities  that  are  traded  in the U.S.  but are  subject  to  trading
restrictions  because they are not registered  under the Securities Act of 1933,
as amended (the "1933 Act").

     INVESTMENT  STRATEGY.  The Portfolio may invest up to 10% of its net assets
     in securities  that are illiquid.  A domestically  traded security which is
     not  registered  under the 1933 Act will not be considered  illiquid if the
     Investment  Adviser  determines that an adequate  trading market exists for
     that security.  If otherwise  consistent with its investment  objective and
     policies,  the Portfolio may purchase  commercial  paper issued pursuant to
     Section 4(2) of the 1933 Act and securities  that are not registered  under
     the  1933  Act  but  can be sold to  "qualified  institutional  buyers"  in
     accordance with Rule 144A under the 1933 Act. These  securities will not be
     considered  illiquid so long as the Investment  Adviser  determines,  under
     guidelines  approved by the  Trust's  Board of  Trustees,  that an adequate
     trading market exists.

     SPECIAL RISKS. Because illiquid and restricted  securities may be difficult
     to sell at an acceptable price,  they may be subject to greater  volatility
     and may result in a loss to the  Portfolio.  The  practice of  investing in
     Rule  144A   Securities   could  increase  the  level  of  the  Portfolio's
     illiquidity  during any period that qualified  institutional  buyers become
     uninterested in purchasing these securities.

     INVESTMENT  COMPANIES.  In connection with the management of its daily cash
positions,  the Portfolio may invest in shares of other money market funds which
invest in short-term,  high quality debt  securities  and  securities  issued by
other  investment  companies  consistent  with  its  investment  objectives  and
policies.

     INVESTMENT  STRATEGY.  Investments  by the  Portfolio in other money market
     funds will be subject to the  limitations of the Investment  Company Act of
     1940.  Although the Portfolio  does not expect to do so in the  foreseeable
     future,  the  Portfolio is authorized  to invest  substantially  all of its
     assets  in an  open-end  investment  company  that has the same  investment
     objective, policies and fundamental restrictions as the Portfolio.

     SPECIAL  RISKS.  As  a  shareholder  of  another  investment  company,  the
     Portfolio  would be subject to the same risks as any other investor in that
     company.  It would also bear a proportionate  share of any fees or expenses
     paid by that company.  These  expenses would be in addition to the advisory
     fees and other expenses the Portfolio bears directly in connection with its
     own operations.

     MUNICIPAL  AND RELATED  INSTRUMENTS.  Municipal  instruments  include  debt
obligations issued by or on behalf of states, territories and possessions of the
United  States  and their  political  subdivisions,  agencies,  authorities  and
instrumentalities.

     Municipal instruments include both "general" and "revenue" bonds and may be
issued to obtain funds for various  public  purposes.  General  obligations  are
secured by the  issuer's  pledge of its full  faith,  credit  and taxing  power.
Revenue obligations are payable only from the revenues derived from a particular
facility or class of facilities.  In some cases,  revenue bonds are also payable
from the proceeds of a special excise or other  specific  revenue source such as
lease  payments  from the user of a  facility  being  financed.  Some  municipal
instruments, known as private activity bonds, are issued to finance projects for
private companies.  Private activity bonds are usually revenue obligations since
they are typically payable by the private user of the facilities financed by the
bonds.

     Municipal  instruments  also include "moral  obligation"  bonds,  municipal
leases,  certificates of participation and custodial receipts.  Moral obligation
bonds are supported by a moral  commitment but not a legal obligation of a state
or municipality.  Municipal leases and  participation  certificates  present the
risk that the state or municipality  involved will not appropriate the monies to
meet  scheduled  payments  on an  annual  basis.  Custodial  receipts  represent
interests in municipal instruments held by a trustee.

     The Portfolio may acquire "stand-by  commitments" relating to the municipal
instruments it holds. Under a stand-by commitment,  a dealer agrees to purchase,
at the Portfolio's option, specified municipal instruments at a specified price.
A stand-by  commitment may increase the cost,  and thereby reduce the yield,  of
the municipal  instruments to which the commitment  relates.  The Portfolio will
acquire stand-by commitments solely to facilitate portfolio liquidity and do not
intend to exercise their rights for trading purposes.

     INVESTMENT  STRATEGY.  In  connection  with its  investments  in  municipal
     instruments,  the Portfolio may invest more than 25% of its total assets in
     (a)  municipal  instruments  the  interest  upon which is paid  solely from
     revenues of similar projects, and (b) industrial  development  obligations.
     The  Portfolio  may also  invest  more  than 25% of the  value of its total
     assets  in  municipal  instruments  whose  issuers  are in the same  state.
     However, the Portfolio does not intend to invest more than 25% of the value
     of its total assets in industrial  development bonds or similar obligations
     where the  non-governmental  entities supplying the revenues to be paid are
     in the same industry.

     SPECIAL  RISKS.  Municipal  instruments  purchased by the  Portfolio may be
     backed by letters of credit, insurance or other forms of credit enhancement
     issued by foreign (as well as  domestic)  banks,  insurance  companies  and
     other  financial  institutions.  If the  credit  quality  of  these  banks,
     insurance  companies and  financial  institutions  declines,  the Portfolio
     could  suffer a loss to the extent that the  Portfolio is relying upon this
     credit support.  Foreign  financial  institutions can present special risks
     relating  to higher  transaction  and  custody  costs,  the  imposition  of
     additional   taxes  by  foreign   governments,   less  complete   financial
     information,  less market  liquidity,  more market volatility and political
     instability.  Foreign banks, insurance companies and financial institutions
     may be subject to less  stringent  reserve  requirements,  and to different
     accounting, auditing and recordkeeping requirements than U.S banks.

     In  addition,  when a  substantial  portion  of the  Portfolio's  assets is
     invested in instruments  which are used to finance  facilities  involving a
     particular  industry,  whose  issuers  are in the same  state or which  are
     otherwise  related,  there is a possibility  that an economic,  business or
     political  development  affecting one instrument  would likewise affect the
     related instrument.

     SECURITIES  LENDING.  In order to generate additional income, the Portfolio
may lend securities on a short-term basis to banks, brokers and dealers or other
qualified institutions. In exchange, the Portfolio will receive collateral equal
to at least 100% of the value of the securities loaned.

     INVESTMENT  STRATEGY.   Securities  lending  may  represent  no  more  than
     one-third the value of the  Portfolio's  total assets  (including  the loan
     collateral).  Any cash  collateral  received by the Portfolio in connection
     with these loans may be invested in U.S.  government  securities  and other
     liquid high-grade debt obligations.

     SPECIAL RISKS. The main risk when lending portfolio  securities is that the
     borrower might become insolvent or refuse to honor its obligation to return
     the securities.  In this event,  the Portfolio could  experience  delays in
     recovering  its  securities  and may  possibly  incur a  capital  loss.  In
     addition, the Portfolio may incur a loss in reinvesting the cash collateral
     it receives.

     STRIPPED OBLIGATIONS. These securities are issued by governmental entities,
banks and other  financial  institutions.  They  entitle  the  holder to receive
either interest payments or principal  payments that have been "stripped" from a
debt obligation.

     INVESTMENT   STRATEGY.   To  the  extent  consistent  with  its  investment
     objective, the Portfolio may purchase stripped securities.

     SPECIAL  RISKS.  Stripped  securities  are very  sensitive to interest rate
     changes and to the rate of  principal  prepayments.  A rapid or  unexpected
     increase  in  prepayments  could  depress  the  price of  certain  stripped
     securities and adversely affect the Portfolio's total return.

     TAXABLE  INVESTMENTS.  Taxable investments include U.S.  dollar-denominated
obligations of U.S. banks,  foreign  commercial  banks and securities  issued or
guaranteed  by foreign  governments;  high  quality  commercial  paper and other
obligations;  high quality corporate bonds and notes;  asset-backed  securities;
securities  issued  or  guaranteed  by the  U.S.  government,  its  agencies  or
instrumentalities  and related  custodial  receipts;  and repurchase  agreements
relating to the above instruments.

     INVESTMENT  STRADEGY.  The  Portfolio  may invest  from time to time,  on a
     temporary basis or for temporary defensive purposes,  in short-term taxable
     instruments that are "Eligible  Securities" as defined by the SEC for money
     market funds.

     SPECIAL  RISKS.  Dividends  paid by the  Portfolio  that are  derived  from
     interest  paid on  taxable  investments  will  generally  be taxable to the
     Portfolio's   shareholders  as  ordinary  income  for  Federal  income  tax
     purposes.  The Portfolio may not achieve its investment  objective when its
     assets are invested in taxable obligations.

     VARIABLE  AND  FLOATING  RATE  INSTRUMENTS.   Variable  and  floating  rate
instruments  have interest rates that are  periodically  adjusted  either at set
intervals  or that float at a margin  above a generally  recognized  index rate.
These instruments  include long-term variable and floating rate bonds (sometimes
referred to as "Put Bonds") where the Portfolio  obtains at the time of purchase
the  right  to put the  bond  back to the  issuer  or a third  party at par at a
specified date.

     INVESTMENT STRATEGY. The Portfolio may invest in rated and unrated variable
     and floating rate instruments to the extent  consistent with its investment
     objective.  Unrated  instruments  may be purchased by the Portfolio if they
     are  determined by the  Investment  Adviser to be of comparable  quality to
     rated instruments eligible for purchase by the Portfolio.

     SPECIAL  RISKS.  Because  there is no active  secondary  market for certain
     variable and floating rate instruments,  they may be more difficult to sell
     if the issuer  defaults on its payment  obligations  or during periods when
     the Portfolio is not entitled to exercise its demand rights.

     WHEN-ISSUED   SECURITIES,   DELAYED   DELIVERY   TRANSACTIONS  AND  FORWARD
COMMITMENTS. A purchase of "when-issued" securities refers to a transaction made
conditionally  because the securities,  although  authorized,  have not yet been
issued. A delayed delivery or forward commitment transaction involves a contract
to  purchase  or sell  securities  for a fixed price at a future date beyond the
customary settlement period.

     INVESTMENT  STRATEGY.  The Portfolio  may purchase or sell  securities on a
     when-issued,  delayed delivery or forward  commitment  basis.  Although the
     Portfolio would generally  purchase  securities in these  transactions with
     the  intention of acquiring  the  securities,  the Portfolio may dispose of
     such securities prior to settlement if the investment management team deems
     it appropriate to do so.

     SPECIAL RISKS. Purchasing securities on a when-issued,  delayed delivery or
     forward commitment basis involves the risk that the securities may decrease
     in value by the time they are  actually  issued or  delivered.  Conversely,
     selling securities in these  transactions  involves the risk that the value
     of the securities may increase  before the time they are actually issued or
     delivered.  These  transactions  also  involve the risk that the seller may
     fail to deliver the security or cash on the settlement date.



For More Information

ANNUAL/
SEMIANNUAL
REPORT

     Additional information about the Portfolio's  investments will be available
in the Portfolio's annual and semiannual reports to shareholders.

STATEMENT OF ADDITIONAL INFORMATION

     Additional  information  about  the  Portfolio  and  its  policies  is also
available in the Portfolio's  Statement of Additional  Information  ("SAI"). The
SAI is  incorporated  by reference into this  Prospectus (is legally  considered
part of this Prospectus).

     The Portfolio's  annual and semiannual reports (when they become available)
and the SAI are available free upon request by calling 1-800-637-1380.

     To obtain other information and for shareholder inquiries:

     By telephone -- Call 1-800-637-1380

     By mail -- Northern Institutional Funds P.O. Box 75943 Chicago, IL 60675

     On the  Internet -- Text-only  versions of the  Portfolio's  documents  are
available on the SEC's website at http://www.sec.gov.

     You may review and obtain  copies of Trust  documents by visiting the SEC's
Public  Reference Room in  Washington,  D.C. You may also obtain copies of Trust
documents  by sending  your  request and a  duplicating  fee to the SEC's Public
Reference Section, Washington, D.C. 20549-6009.  Information on the operation of
the Public Reference Room may be obtained by calling the SEC at 1-800-SEC-0330.

Northern
Institutional Funds
SERVICE SHARES AND PREMIER SHARES PROSPECTUS

811-3605


INVESTMENT ADVISER

The Northern Trust Company
50 South LaSalle Street
Chicago, IL 60675

TRANSFER AGENT
AND CUSTODIAN

The Northern Trust Company



                                       PART B

                       STATEMENT OF ADDITIONAL INFORMATION

                          NORTHERN INSTITUTIONAL FUNDS

                         SMALL COMPANY GROWTH PORTFOLIO

     This  Statement of  Additional  Information  dated  October ___,  1999 (the
"Additional  Statement")  is not a prospectus.  Copies of the  prospectus  dated
October ___, 1999 for the Small Company Growth  Portfolio (the  "Portfolio")  of
Northern  Institutional  Funds (the "Prospectus") may be obtained without charge
by calling 1-800-637-1380  (toll-free).  Capitalized terms not otherwise defined
have the same meaning as in the Prospectus.





                                      INDEX

                                                                      Page

ADDITIONAL INVESTMENT INFORMATION....................................
         Classification and History..................................
         Investment Objective, Strategies and Risks..................
         Investment Restrictions.....................................

ADDITIONAL TRUST INFORMATION.........................................
         Trustees and Officers.......................................
         Investment Adviser, Transfer Agent and Custodian............
         Portfolio Transactions......................................
         Portfolio Valuation.........................................
         Co-Administrators and Distributor...........................
         Shareholder Servicing Plan..................................
         Counsel and Auditors........................................
         In-Kind Purchases and Redemptions...........................

PERFORMANCE INFORMATION..............................................

TAXES................................................................
         General.....................................................
         Foreign Investors...........................................
         Conclusion..................................................

DESCRIPTION OF SHARES................................................

OTHER INFORMATION....................................................

FINANCIAL STATEMENTS.................................................

APPENDIX A...........................................................

APPENDIX B...........................................................

     No  person  has  been  authorized  to give any  information  or to make any
representations not contained in this Additional  Statement or in the Prospectus
in connection  with the offering made by the  Prospectus  and, if given or made,
such  information  or  representations  must not be relied  upon as having  been
authorized by the Trust or its  distributor.  The Prospectus does not constitute
an offering by the Trust or by the distributor in any jurisdiction in which such
offering may not lawfully be made.

     An  investment  in the  Portfolio  is not a deposit  of any bank and is not
insured or guaranteed by the Federal Deposit Insurance  Corporation or any other
government  agency.  An investment in the Portfolio  involves  investment risks,
including possible loss of principal.



                        ADDITIONAL INVESTMENT INFORMATION

                           Classification and History

     Northern  Institutional  Funds (the  "Trust")  is an  open-end,  management
investment  company.  The  Portfolio  is  classified  as  diversified  under the
Investment Company Act of 1940, as amended (the "1940 Act").

     The  Portfolio  is a series of the  Trust,  which was  formed as a Delaware
business trust on July 1, 1997 under an Agreement and  Declaration of Trust (the
"Trust  Agreement").   The  Trust  is  the  result  of  a  reorganization  of  a
Massachusetts business trust known as The Benchmark Funds on March 31, 1998. The
Trust's name was changed from The Benchmark Funds to the Northern  Institutional
Funds on July 15,  1998.  The Trust  also  offers six fixed  income,  five money
market, one balanced and six other equity portfolios, which are not described in
this document.

                   INVESTMENT OBJECTIVE, STRATEGIES AND RISKS

     The following supplements the investment objective, strategies and risks of
the Portfolio as set forth in the  Prospectus.  Except as expressly noted below,
the  Portfolio's  investment  objective  and  policies  may be  changed  without
shareholder approval.

     Commercial  Paper,  Bankers'  Acceptances,  Certificates  of Deposit,  Time
Deposits  and Bank  Notes.  Commercial  paper  represents  short-term  unsecured
promissory  notes  issued in  bearer  form by banks or bank  holding  companies,
corporations  and finance  companies.  Certificates  of deposit  are  negotiable
certificates  issued against funds deposited in a commercial bank for a definite
period  of time  and  earning  a  specified  return.  Bankers'  acceptances  are
negotiable  drafts  or bills of  exchange,  normally  drawn  by an  importer  or
exporter  to pay for  specific  merchandise,  which  are  "accepted"  by a bank,
meaning, in effect, that the bank  unconditionally  agrees to pay the face value
of the instrument on maturity.  Fixed time deposits are bank obligations payable
at a stated  maturity  date and bearing  interest  at a fixed  rate.  Fixed time
deposits may be withdrawn on demand by the investor, but may be subject to early
withdrawal  penalties  that  vary  depending  upon  market  conditions  and  the
remaining maturity of the obligation.  There are no contractual  restrictions on
the right to transfer a  beneficial  interest in a fixed time deposit to a third
party. Bank notes and bankers' acceptances rank junior to deposit liabilities of
the bank and pari passu with other senior,  unsecured  obligations  of the bank.
Bank notes are classified as "other borrowings" on a bank's balance sheet, while
deposit notes and certificates of deposit are classified as deposits. Bank notes
are not  insured  by the  Federal  Deposit  Insurance  Corporation  or any other
insurer.  Deposit notes are insured by the Federal Deposit Insurance Corporation
only to the extent of $100,000 per depositor per bank.

     The Portfolio may invest a portion of its net assets in the  obligations of
foreign banks and foreign branches of domestic banks.  Such obligations  include
Eurodollar Certificates of Deposit ("ECDs"),  which are U.S.  dollar-denominated
certificates  of deposit issued by offices of foreign and domestic banks located
outside the United States;  Eurodollar  Time Deposits  ("ETDs"),  which are U.S.
dollar-denominated  deposits  in a foreign  branch  of a U.S.  bank or a foreign
bank;  Canadian Time Deposits  ("CTDs"),  which are essentially the same as ETDs
except they are issued by Canadian offices of major Canadian banks; Schedule Bs,
which are obligations  issued by Canadian branches of foreign or domestic banks;
Yankee Certificates of Deposit ("Yankee Cds"), which are U.S. dollar-denominated
certificates  of deposit  issued by a U.S.  branch of a foreign bank and held in
the United States;  and Yankee Bankers'  Acceptances  ("Yankee Bas"),  which are
U.S.  dollar-denominated  bankers'  acceptances  issued  by a U.S.  branch  of a
foreign bank and held in the United States.

     Insurance  Funding  Agreements.  An insurance  funding agreement ("IFA") is
normally  a  general  obligation  of the  issuing  insurance  company  and not a
separate account. The purchase price paid for an IFA becomes part of the general
assets of the  insurance  company,  and the contract is paid from the  company's
general assets.  Generally,  IFAs are not assignable or transferable without the
permission of the issuing insurance companies, and an active secondary market in
IFAs  may  not  exist.  Therefore,  IFAs  will  be  subject  to the  Portfolio's
limitation on illiquid  investments when the Portfolio may not demand payment of
the principal amount within seven days and a reliable trading market is absent.

     Zero Coupon,  Pay-In-Kind  and Capital  Appreciation  Bonds.  To the extent
consistent  with its  investment  objective,  the  Portfolio  may invest in zero
coupon bonds,  capital  appreciation bonds and pay-in-kind  ("PIK")  securities.
Zero coupon and capital appreciation bonds are debt securities issued or sold at
a discount  from their  face  value and which do not  entitle  the holder to any
periodic payment of interest prior to maturity or a specified date. The original
issue discount  varies  depending on the time  remaining  until maturity or cash
payment date,  prevailing  interest rates, the liquidity of the security and the
perceived credit quality of the issuer.  These securities also may take the form
of debt securities that have been stripped of their unmatured  interest coupons,
the coupons  themselves or receipts or  certificates  representing  interests in
such  stripped  debt  obligations  or coupons.  The market prices of zero coupon
bonds, capital appreciation bonds and PIK securities generally are more volatile
than the market prices of interest bearing  securities and are likely to respond
to a  greater  degree  to  changes  in  interest  rates  than  interest  bearing
securities having similar maturities and credit quality.

     PIK securities may be debt obligations or preferred shares that provide the
issuer with the option of paying  interest or dividends on such  obligations  in
cash or in the form of additional  securities rather than cash.  Similar to zero
coupon  bonds,  PIK  securities  are designed to give an issuer  flexibility  in
managing cash flow. PIK securities that are debt securities can either be senior
or subordinated debt and generally trade flat (i.e.,  without accrued interest).
The trading price of PIK debt securities  generally reflects the market value of
the underlying debt plus an amount representing  accrued interest since the last
interest payment.

     Zero coupon bonds,  capital  appreciation  bonds and PIK securities involve
the additional risk that,  unlike  securities that  periodically pay interest to
maturity,  the Portfolio  will realize no cash until a specified  future payment
date  unless a portion  of such  securities  is sold and,  if the issuer of such
securities  defaults,  the  Portfolio  may  obtain  no  return  at  all  on  its
investment.  In  addition,  even though such  securities  do not provide for the
payment of current  interest in cash, the Portfolio is  nonetheless  required to
accrue  income  on such  investments  for each  taxable  year and  generally  is
required to distribute such accrued amounts (net of deductible expenses, if any)
to avoid being subject to tax. Because no cash is generally received at the time
of the  accrual,  the  Portfolio  may be required to liquidate  other  portfolio
securities  to  obtain  sufficient  cash to  satisfy  federal  tax  distribution
requirements applicable to the Portfolio.

     Repurchase  Agreements.  The  Portfolio  may  agree to  purchase  portfolio
securities  from  financial  institutions  subject to the seller's  agreement to
repurchase  them  at  a  mutually  agreed  upon  date  and  price   ("repurchase
agreements").  Repurchase  agreements  are  considered  to be  loans  under  the
Investment Company Act of 1940 (the "1940 Act"). Although the securities subject
to a repurchase agreement may bear maturities exceeding one year, settlement for
the repurchase  agreement will never be more than one year after the Portfolio's
acquisition  of the  securities  and normally will be within a shorter period of
time. Securities subject to repurchase agreements are held either by the Trust's
custodian  or  subcustodian  (if  any),  or  in  the  Federal   Reserve/Treasury
Book-Entry System.  The seller under a repurchase  agreement will be required to
maintain  the value of the  securities  subject  to the  agreement  in an amount
exceeding the repurchase  price  (including  accrued  interest).  Default by the
seller would, however,  expose the Portfolio to possible loss because of adverse
market  action or delay in connection  with the  disposition  of the  underlying
obligations.

     Reverse  Repurchase  Agreements.  The Portfolio may borrow funds by selling
portfolio securities to financial  institutions such as banks and broker/dealers
and agreeing to repurchase them at a mutually specified date and price ("reverse
repurchase  agreements").   The  Portfolio  may  use  the  proceeds  of  reverse
repurchase  agreements to purchase other securities either maturing, or under an
agreement to resell,  on a date  simultaneous with or prior to the expiration of
the reverse repurchase  agreement.  Reverse repurchase agreements are considered
to be borrowings under the 1940 Act. Reverse  repurchase  agreements involve the
risk that the market value of the  securities  sold by the Portfolio may decline
below the repurchase  price. The Portfolio will pay interest on amounts obtained
pursuant to a reverse repurchase agreement.  While reverse repurchase agreements
are  outstanding,  the Portfolio  will  segregate  liquid assets in an amount at
least  equal to the  market  value of the  securities,  plus  accrued  interest,
subject to the agreement.

     Variable and Floating  Rate  Instruments.  With respect to the variable and
floating rate  instruments that may be acquired by the Portfolio as described in
the  Prospectus,  the Investment  Adviser will consider the earning power,  cash
flows  and  other  liquidity  ratios  of the  issuers  and  guarantors  of  such
instruments and, if the instruments are subject to demand features, will monitor
their  financial  status and ability to meet payment on demand.  In  determining
weighted average  portfolio  maturity,  an instrument may, subject to applicable
Securities  and Exchange  Commission  ("SEC")  regulations,  be deemed to have a
maturity  shorter than its nominal  maturity based on the period remaining until
the next interest rate  adjustment or the time the Portfolio can recover payment
of principal as specified in the  instrument.  Where  necessary to ensure that a
variable or floating rate  instrument is of the minimum  required credit quality
for  the  Portfolio,  the  issuer's  obligation  to  pay  the  principal  of the
instrument  will be backed by an  unconditional  bank  letter or line of credit,
guarantee or commitment to lend.

     The  Portfolio  may  deem  the  maturity  of  variable  and  floating  rate
instruments to be less than their stated  maturities based on their variable and
floating rate features and/or their put features.  Unrated variable and floating
rate  instruments  will  be  determined  by  the  Investment  Adviser  to  be of
comparable  quality at the time of  purchase to rated  instruments  which may be
purchased by the Portfolio.

     Variable and floating rate instruments  including  inverse floaters held by
the  Portfolio  will  be  subject  to the  Portfolio's  limitation  on  illiquid
investments  when the Portfolio may not demand  payment of the principal  amount
within seven days absent a reliable trading market.

     Forward   Commitments,    When-Issued   Securities   and   Delayed-Delivery
Transactions.  The Portfolio may purchase  securities on a when-issued  basis or
purchase or sell securities on a forward  commitment  (sometimes  called delayed
delivery)  basis.  These  transactions  involve a commitment by the Portfolio to
purchase  or sell  securities  at a future  date.  The  price of the  underlying
securities  (usually  expressed  in  terms  of  yield)  and the  date  when  the
securities will be delivered and paid for (the settlement date) are fixed at the
time the transaction is negotiated. When-issued purchases and forward commitment
transactions are normally negotiated directly with the other party.

     The Portfolio will purchase  securities on a when-issued  basis or purchase
or sell  securities  on a forward  commitment  basis only with the  intention of
completing the transaction and actually purchasing or selling the securities. If
deemed advisable as a matter of investment strategy,  however, the Portfolio may
dispose of or negotiate a commitment  after entering into it. The Portfolio also
may sell  securities it has committed to purchase  before those  securities  are
delivered to the Portfolio on the settlement date.

     When the Portfolio purchases securities on a when-issued,  delayed-delivery
or forward commitment basis, the Portfolio will segregate liquid assets having a
value  (determined  daily)  at least  equal  to the  amount  of the  Portfolio's
purchase  commitments  until three days prior to the  settlement  date,  or will
otherwise cover its position.  These  procedures are designed to ensure that the
Portfolio will maintain  sufficient assets at all times to cover its obligations
under   when-issued   purchases,   forward   commitments  and   delayed-delivery
transactions.    For   purposes   of   determining   the   Portfolio's   average
dollar-weighted  maturity,  the  maturity of  when-issued,  delayed-delivery  or
forward commitment securities will be calculated from the commitment date.

     United  States  Government  Obligations.  Examples  of the  types  of  U.S.
Government  obligations  that may be  acquired  by the  Portfolio  include  U.S.
Treasury Bills, Treasury Notes and Treasury Bonds and the obligations of Federal
Home Loan Banks,  Federal Farm Credit  Banks,  Federal  Land Banks,  the Federal
Housing Administration,  Farmers Home Administration,  Export-Import Bank of the
United  States,  Small  Business   Administration,   Federal  National  Mortgage
Association ("FNMA"), Government National Mortgage Association ("GNMA"), General
Services  Administration,  Central  Bank for  Cooperatives,  Federal  Home  Loan
Mortgage Corporation  ("FHLMC"),  Federal Intermediate Credit Banks and Maritime
Administration.

     Supranational Bank Obligations.  The Portfolio may invest in obligations of
supranational banks.  Supranational banks are international banking institutions
designed   or   supported   by   national   governments   to  promote   economic
reconstruction, development or trade among nations (e.g., the International Bank
for Reconstruction and Development).  Obligations of supranational  banks may be
supported by appropriated  but unpaid  commitments of their member countries and
there is no assurance  that these  commitments  will be undertaken or met in the
future.

     Stripped Obligations.  The Treasury Department has facilitated transfers of
ownership of zero coupon securities by accounting  separately for the beneficial
ownership  of  particular  interest  coupon and  principal  payments on Treasury
securities  through the Federal Reserve  book-entry  record-keeping  system. The
Federal  Reserve  program as established by the Treasury  Department is known as
"STRIPS"  or  "Separate   Trading  of  Registered   Interest  and  Principal  of
Securities."  The  Portfolio  may purchase  securities  registered in the STRIPS
program.  Under the STRIPS program, the Portfolio is able to have its beneficial
ownership  of  zero  coupon  securities  recorded  directly  in  the  book-entry
record-keeping  system in lieu of having to hold certificates or other evidences
of ownership of the underlying U.S. Treasury securities.

     In addition,  the Portfolio  may acquire U.S.  Government  obligations  and
their unmatured interest coupons that have been separated  ("stripped") by their
holder,  typically  a  custodian  bank  or  investment  brokerage  firm.  Having
separated  the  interest  coupons  from  the  underlying  principal  of the U.S.
Government  obligations,  the holder  will  resell the  stripped  securities  in
custodial receipt programs with a number of different names, including "Treasury
Income  Growth  Receipts"  ("TIGRs")  and  "Certificate  of Accrual on  Treasury
Securities"  ("CATS").  The  stripped  coupons  are  sold  separately  from  the
underlying principal, which is usually sold at a deep discount because the buyer
receives  only the right to receive a future  fixed  payment on the security and
does not receive any rights to periodic interest (cash) payments. The underlying
U.S.  Treasury  bonds and notes  themselves  are held in book-entry  form at the
Federal Reserve Bank or, in the case of bearer  securities  (i.e.,  unregistered
securities  which are  ostensibly  owned by the bearer or  holder),  in trust on
behalf of the owners. Counsel to the underwriters of these certificates or other
evidences of ownership of U.S.  Treasury  securities  have stated that, in their
opinion,  purchasers of the stripped  securities  most likely will be deemed the
beneficial holders of the underlying U.S. Government obligations for federal tax
purposes.  The  Trust  is  unaware  of  any  binding  legislative,  judicial  or
administrative authority on this issue.

     Other types of stripped  securities  that may be purchased by the Portfolio
include  stripped   mortgage-backed   securities  ("SMBS").   SMBS  are  usually
structured  with two or more classes that receive  different  proportions of the
interest and principal distributions from a pool of mortgage-backed obligations.
A common type of SMBS will have one class  receiving all of the interest,  while
the other class receives all of the principal.  However, in some instances,  one
class will  receive some of the  interest  and most of the  principal  while the
other  class  will  receive  most  of the  interest  and  the  remainder  of the
principal.  If the underlying  obligations  experience  greater than anticipated
prepayments  of  principal,  the  Portfolio may fail to fully recoup its initial
investment  in  these  securities.  The  market  value of the  class  consisting
entirely of principal  payments  generally is extremely  volatile in response to
changes in interest  rates.  The yields on a class of SMBS that  receives all or
most of the interest are generally higher than prevailing market yields on other
mortgage-backed  obligations  because their cash flow patterns are also volatile
and there is a risk that the initial investment will not be fully recouped. SMBS
issued by the U.S.  Government (or a U.S.  Government agency or instrumentality)
may be considered  liquid under  guidelines  established by the Trust's Board of
Trustees if they can be disposed of promptly in the ordinary  course of business
at a value  reasonably  close to that used in the  calculation  of the net asset
value per share.

     Asset-Backed  Securities.  To the extent  described in the Prospectus,  the
Portfolio may purchase asset-backed  securities,  which are securities backed by
mortgages,  installment  contracts,  credit card  receivables  or other  assets.
Asset-backed  securities  represent  interests  in  "pools"  of  assets in which
payments of both interest and principal on the securities are made periodically,
thus in effect "passing through" such payments made by the individual  borrowers
on the assets that underlie the  securities,  net of any fees paid to the issuer
or guarantor of the  securities.  The average  life of  asset-backed  securities
varies with the maturities of the underlying  instruments,  and the average life
of a mortgage-backed  instrument,  in particular,  is likely to be substantially
less than the original  maturity of the mortgage pools underlying the securities
as a result of mortgage prepayments. For this and other reasons, an asset-backed
security's stated maturity may be shortened, and the security's total return may
be difficult to predict precisely.

     If an  asset-backed  security is purchased at a premium,  a prepayment rate
that is faster than expected  will reduce yield to maturity,  while a prepayment
rate that is slower than  expected  will have the opposite  effect of increasing
yield to maturity.  Conversely,  if an  asset-backed  security is purchased at a
discount,  faster than expected  prepayments  will  increase,  while slower than
expected prepayments will decrease, yield to maturity.

     Prepayments  on  asset-backed  securities  generally  increase with falling
interest rates and decrease with rising interest rates; furthermore,  prepayment
rates are  influenced by a variety of economic and social  factors.  In general,
the collateral  supporting  non-mortgage  asset-backed  securities is of shorter
maturity  than  mortgage  loans  and is less  likely to  experience  substantial
prepayments.

     Asset-backed   securities   acquired   by   the   Portfolio   may   include
collateralized  mortgage obligations ("CMOs") issued by private companies.  CMOs
provide  the  holder  with a  specified  interest  in the cash flow of a pool of
underlying  mortgages  or  other  mortgage-backed  securities.  Issuers  of CMOs
ordinarily  elect to be  taxed as  pass-through  entities  known as real  estate
mortgage  investment conduits  ("REMICs").  CMOs are issued in multiple classes,
each with a specified fixed or floating  interest rate and a final  distribution
date.  The relative  payment rights of the various CMO classes may be structured
in a variety of ways. The Portfolio will not purchase  "residual" CMO interests,
which normally exhibit greater price volatility.

     There  are a  number  of  important  differences  among  the  agencies  and
instrumentalities of the U.S. Government that issue mortgage-related  securities
and among the securities that they issue. Mortgage-related securities guaranteed
by GNMA include GNMA Mortgage  Pass-Through  Certificates (also known as "Ginnie
Maes"),  which are guaranteed as to the timely payment of principal and interest
by GNMA and backed by the full faith and credit of the United States.  GNMA is a
wholly-owned U.S.  Government  corporation  within the Department of Housing and
Urban Development. GNMA certificates also are supported by the authority of GNMA
to borrow funds from the U.S.  Treasury to make  payments  under its  guarantee.
Mortgage-backed  securities  issued by FNMA  include  FNMA  Guaranteed  Mortgage
Pass-Through  Certificates  (also known as "Fannie Maes"),  which are solely the
obligations  of FNMA and are not  backed by or  entitled  to the full  faith and
credit of the United  States,  but are  supported  by the right of the issuer to
borrow from the  Treasury.  FNMA is a  government-sponsored  organization  owned
entirely  by  private  stockholders.  Fannie  Maes are  guaranteed  as to timely
payment of the  principal  and  interest  by FNMA.  Mortgage-related  securities
issued by the Federal Home Loan  Mortgage  Corporation  ("FHLMC")  include FHLMC
Mortgage  Participation  Certificates  (also known as "Freddie  Macs" or "PCs").
FHLMC is a corporate  instrumentality of the United States,  created pursuant to
an Act of Congress,  which is owned entirely by Federal Home Loan Banks. Freddie
Macs are not guaranteed and do not constitute a debt or obligation of the United
States or of any  Federal  Home Loan Bank.  Freddie  Macs  entitle the holder to
timely  payment of interest,  which is  guaranteed  by FHLMC.  FHLMC  guarantees
either  ultimate  collection or timely payment of all principal  payments on the
underlying  mortgage  loans.  When FHLMC does not  guarantee  timely  payment of
principal,  FHLMC  may remit the  amount  due on  account  of its  guarantee  of
ultimate  payment  of  principal  at any time  after  default  on an  underlying
mortgage, but in no event later than one year after it becomes payable.

     Non-mortgage  asset-backed  securities  involve  certain risks that are not
presented by mortgage-backed securities. Primarily, these securities do not have
the benefit of the same security interest in the underlying  collateral.  Credit
card  receivables  are  generally  unsecured and the debtors are entitled to the
protection of a number of state and federal  consumer credit laws, many of which
have  given  debtors  the right to set off  certain  amounts  owed on the credit
cards, thereby reducing the balance due. Most issuers of automobile  receivables
permit the servicers to retain possession of the underlying obligations.  If the
servicer were to sell these  obligations to another party,  there is a risk that
the purchaser  would acquire an interest  superior to that of the holders of the
related  automobile  receivables.  In  addition,  because of the large number of
vehicles involved in a typical issuance and technical  requirements  under state
laws, the trustee for the holders of the automobile  receivables may not have an
effective security interest in all of the obligations  backing such receivables.
Therefore,  there is a possibility that recoveries on repossessed collateral may
not, in some cases, be able to support payments on these securities.

     Warrants. The Portfolio may purchase warrants and similar rights, which are
privileges  issued by  corporations  enabling  the  owners to  subscribe  to and
purchase a specified  number of shares of the  corporation at a specified  price
during a specified  period of time.  The prices of  warrants do not  necessarily
correlate  with the prices of the  underlying  shares.  The purchase of warrants
involves the risk that the Portfolio  could lose the purchase value of a warrant
if the right to subscribe to  additional  shares is not  exercised  prior to the
warrant's expiration.  Also, the purchase of warrants involves the risk that the
effective  price paid for the  warrant  added to the  subscription  price of the
related security may exceed the value of the subscribed  security's market price
such as when there is no movement in the level of the underlying security.

     Foreign Securities. The Portfolio may invest a portion of its assets in the
securities of foreign  issuers,  including  eurodollar  convertible  securities,
which are fixed income  securities  that are issued in U.S.  dollars outside the
United States and are convertible into or exchangeable for equity  securities of
the same or a different issuer.

     Investment in foreign  securities  involves  special  risks.  These include
market risk,  interest  rate risk and the risks of investing  in  securities  of
foreign issuers and of companies whose securities are principally traded outside
the United States and in investments  denominated in foreign currencies.  Market
risk involves the possibility  that stock prices will decline over short or even
extended  periods.  The stock  markets  tend to be  cyclical,  with  periods  of
generally rising prices and periods of generally declining prices.  These cycles
will affect the value of the  Portfolio to the extent that it invests in foreign
stocks.  The holdings of the  Portfolio,  to the extent that it invests in fixed
income  securities,  will be  sensitive  to  changes in  interest  rates and the
interest rate  environment.  Generally,  the prices of bonds and debt securities
fluctuate inversely with interest rate changes. In addition,  the performance of
investments in securities  denominated in a foreign  currency will depend on the
strength of the foreign  currency  against the U.S. dollar and the interest rate
environment in the country issuing the currency. Absent other events which could
otherwise  affect  the  value of a  foreign  security  (such as a change  in the
political  climate or an issuer's credit quality),  appreciation in the value of
the foreign  currency  generally  can be  expected  to  increase  the value of a
foreign  currency-denominated  security  in  terms  of U.S.  dollars.  A rise in
foreign interest rates or decline in the value of the foreign currency  relative
to the U.S.  dollar  generally can be expected to depress the value of a foreign
currency-denominated security.

     There are other risks and costs involved in investing in foreign securities
which are in  addition to the usual  risks  inherent  in  domestic  investments.
Investment in foreign  securities  involves higher costs than investment in U.S.
securities,  including  higher  transaction  and  custody  costs  as well as the
imposition of additional taxes by foreign governments.  Foreign investments also
involve  risks  associated  with the  level of  currency  exchange  rates,  less
complete financial  information about the issuers,  less market liquidity,  more
market  volatility  and  political  instability.  Future  political and economic
developments,  the possible  imposition of withholding taxes on dividend income,
the  possible  seizure or  nationalization  of foreign  holdings,  the  possible
establishment  of  exchange  controls,  or the  adoption  of other  governmental
restrictions  might  adversely  affect  an  investment  in  foreign  securities.
Additionally,  foreign banks and foreign  branches of domestic banks are subject
to less stringent reserve requirements,  and to different  accounting,  auditing
and recordkeeping requirements.

     The  Portfolio  may invest in foreign  debt,  including  the  securities of
foreign governments. Several risks exist concerning such investments,  including
the risk that  foreign  governments  may default on their  obligations,  may not
respect the  integrity of such debt,  may attempt to  renegotiate  the debt at a
lower rate, and may not honor investments by United States entities or citizens.

     To the extent consistent with its investment  objective,  the Portfolio may
also invest in  obligations of the  International  Bank for  Reconstruction  and
Development  (also known as the World Bank) which are  supported by  subscribed,
but unpaid,  commitments  of its member  countries.  There is no assurance  that
these commitments will be undertaken or complied with in the future.

     The end of the Cold War, the reunification of Germany, the accession of new
Western  European  members to the European  Economic and Monetary  Union and the
aspirations of Eastern  European  states to join and other  political and social
events in  Europe  have  caused  considerable  economic,  social  and  political
dislocation.  In addition, events in the Japanese economy, as well as social and
political  developments  there have affected  Japanese  securities  and currency
markets,  and have  disrupted  the  relationship  of the Japanese yen with other
currencies  and with the U.S.  dollar.  Future  political,  economic  and social
developments in Japan and in the  Asia/Pacific  regional context can be expected
to produce continuing effects on securities and currency markets.

     Although the  Portfolio  may invest in  securities  denominated  in foreign
currencies,  its  portfolio  securities  and  other  assets  are  valued in U.S.
dollars.  Currency exchange rates may fluctuate significantly over short periods
of time causing, together with other factors, the Portfolio's net asset value to
fluctuate as well. Currency exchange rates can be affected  unpredictably by the
intervention  or the  failure to  intervene  by U.S. or foreign  governments  or
central banks, or by currency controls or political  developments in the U.S. or
abroad. To the extent that the Portfolio's total assets, adjusted to reflect the
Portfolio's  net position  after  giving  effect to currency  transactions,  are
denominated in the currencies of foreign  countries,  the Portfolio will be more
susceptible to the risk of adverse  economic and political  developments  within
those  countries.  The  Portfolio is also subject to the possible  imposition of
exchange control regulations or freezes on the convertibility of currency.

     Dividends  and  interest  payable  on  the  Portfolio's  foreign  portfolio
securities may be subject to foreign withholding taxes. To the extent such taxes
are not offset by credits or deductions  allowed to investors under U.S. federal
income tax law, they may reduce the net return to the shareholders. See "Taxes."

     American  Depository  Receipts.  The Portfolio can invest in ADRs. ADRs are
receipts  typically  issued by a United States bank or trust company  evidencing
ownership of the  underlying  foreign  securities  and are  denominated  in U.S.
dollars. Some institutions issuing ADRs may not be sponsored by the issuer.

     A non-sponsored depository may not provide the same shareholder information
that a  sponsored  depository  is  required  to  provide  under its  contractual
arrangement with the issuer.

     European  Depository  Receipts.  The  Portfolio can also invest in EDRs and
GDRs.  EDRs and GDRs are  receipts  issued by a non-U.S.  financial  institution
evidencing  ownership of underlying  foreign or U.S.  securities and are usually
denominated in foreign  currencies.  EDRs and GDRs may not be denominated in the
same currency as the securities  they  represent.  Generally,  EDRs and GDRs are
designed for use in the foreign securities markets.

     Foreign Currency Transactions.  In order to protect against a possible loss
on  investments  resulting  from a  decline  or  appreciation  in the value of a
particular  foreign currency against the U.S. dollar or another foreign currency
or for other reasons, the Portfolio is authorized to enter into forward currency
exchange contracts.  These contracts involve an obligation to purchase or sell a
specified  currency at a future date at a price set at the time of the contract.
Forward  currency  contracts  do not  eliminate  fluctuations  in the  values of
portfolio  securities  but rather may allow the Portfolio to establish a rate of
exchange for a future point in time.

     When entering  into a contract for the purchase or sale of a security,  the
Portfolio may enter into a forward foreign  currency  exchange  contract for the
amount of the purchase or sale price to protect against variations,  between the
date the security is purchased or sold and the date on which  payment is made or
received,  in the value of the foreign  currency  relative to the U.S. dollar or
other foreign currency.

     In addition,  when the  Investment  Adviser  anticipates  that a particular
foreign currency may decline substantially  relative to the U.S. dollar or other
leading  currencies,  in order to reduce risk,  the  Portfolio  may enter into a
forward  contract to sell,  for a fixed amount,  the amount of foreign  currency
approximating the value of some or all of the Portfolio's securities denominated
in such foreign currency.  Similarly,  when the securities held by the Portfolio
create a short  position in a foreign  currency,  the Portfolio may enter into a
forward  contract  to buy,  for a fixed  amount,  an amount of foreign  currency
approximating  the short  position.  The  Portfolio's net long and short foreign
currency  exposure  will not exceed its total asset  value.  With respect to any
forward foreign  currency  contract,  it will not generally be possible to match
precisely the amount  covered by that  contract and the value of the  securities
involved  due to the  changes in the values of such  securities  resulting  from
market  movements  between the date the forward contract is entered into and the
date it  matures.  While  forward  contracts  may offer  protection  from losses
resulting  from declines or  appreciation  in the value of a particular  foreign
currency, they also limit potential gains which might result from changes in the
value of such currency.  The Portfolio will also incur costs in connection  with
forward  foreign  currency   exchange   contracts  and  conversions  of  foreign
currencies and U.S. dollars.

     Liquid assets equal to the amount of the  Portfolio's  assets that could be
required to consummate forward contracts will be segregated except to the extent
the contracts are otherwise  "covered." The segregated  assets will be valued at
market or fair  value.  If the  market or fair  value of such  assets  declines,
additional  liquid  assets  will be  segregated  daily so that the  value of the
segregated assets will equal the amount of such commitments by the Portfolio.  A
forward  contract to sell a foreign  currency is "covered" if the Portfolio owns
the  currency  (or  securities  denominated  in  the  currency)  underlying  the
contract,  or holds a forward contract (or call option) permitting the Portfolio
to buy the same  currency at a price that is (i) no higher than the  Portfolio's
price to sell the currency or (ii) greater  than the  Portfolio's  price to sell
the currency  provided the Portfolio  segregates  liquid assets in the amount of
the difference. A forward contract to buy a foreign currency is "covered" if the
Portfolio holds a forward  contract (or put option)  permitting the Portfolio to
sell the same  currency  at a price  that is (i) as high as or  higher  than the
Portfolio's  price to buy the currency or (ii) lower than the Portfolio's  price
to buy the  currency  provided the  Portfolio  segregates  liquid  assets in the
amount of the difference.

     Options.  The  Portfolio may buy put options and buy call options and write
covered  call and secured put  options.  Such  options may relate to  particular
securities,  foreign and domestic securities indices,  financial  instruments or
foreign  currencies,  and may or may not be  listed  on a  domestic  or  foreign
securities  exchange  and  may or may  not be  issued  by the  Options  Clearing
Corporation.  A call option for a particular security gives the purchaser of the
option the right to buy, and a writer the  obligation  to sell,  the  underlying
security at the stated  exercise  price prior to the  expiration  of the option,
regardless of the market price of the  security.  The premium paid to the writer
is in consideration for undertaking the obligation under the option contract.  A
put option for a particular  security  gives the purchaser the right to sell the
security  at the  stated  exercise  price  prior to the  expiration  date of the
option,  regardless of the market price of the security.  Options on indices and
yield curve options  provide the holder with the right to make or receive a cash
settlement upon exercise of the option. With respect to options on indices,  the
amount of the settlement will equal the difference  between the closing price of
the index at the time of exercise and the exercise price of the option expressed
in dollars, times a specified multiple. With respect to yield curve options, the
amount  of the  settlement  will  equal the  difference  between  the  yields of
designated securities.

     Options trading is a highly specialized activity which entails greater than
ordinary  investment  risk.  Options may be more  volatile  than the  underlying
instruments and, therefore,  on a percentage basis, an investment in options may
be  subject  to  greater  fluctuation  than  an  investment  in  the  underlying
instruments themselves.

     The  Portfolio  will write call options only if they are  "covered." In the
case of a call option on a security or currency,  the option is "covered" if the
Portfolio  owns  the  instrument  underlying  the  call or has an  absolute  and
immediate right to acquire that instrument without additional cash consideration
(or, if additional cash consideration is required,  liquid assets in such amount
are segregated)  upon conversion or exchange of other securities held by it. For
a call option on an index, the option is covered if the Portfolio maintains with
its  custodian  securities  comprising  the index or liquid  assets equal to the
contract  value. A call option is also covered if the Portfolio  holds a call on
the same instrument or index as the call written where the exercise price of the
call held is (i) equal to or less than the exercise  price of the call  written,
or (ii)  greater  than  the  exercise  price of the call  written  provided  the
Portfolio  segregates  liquid  assets  in  the  amount  of the  difference.  The
Portfolio will write put options only if they are "secured" by segregated liquid
assets in an amount not less than the exercise  price of the option at all times
during the option period.

     The Portfolio's  obligation to sell an instrument subject to a covered call
option  written by it, or to  purchase  an  instrument  subject to a secured put
option  written by it, may be  terminated  prior to the  expiration  date of the
option by the Portfolio's execution of a closing purchase transaction,  which is
effected by purchasing  on an exchange an option of the same series (i.e.,  same
underlying  instrument,  exercise  price  and  expiration  date)  as the  option
previously  written.  Such a  purchase  does not result in the  ownership  of an
option. A closing purchase  transaction will ordinarily be effected to realize a
profit on an outstanding option, to prevent an underlying  instrument from being
called, to permit the sale of the underlying instrument or to permit the writing
of a new option containing  different terms on such underlying  instrument.  The
cost of such a liquidation  purchase plus transaction  costs may be greater than
the premium received upon the original option, in which event the Portfolio will
have  incurred a loss in the  transaction.  There is no assurance  that a liquid
secondary market will exist for any particular option. An option writer,  unable
to  effect  a  closing  purchase  transaction,  will  not be able  to  sell  the
underlying  instrument  (in the case of a covered call option) or liquidate  the
segregated assets (in the case of a secured put option) until the option expires
or the optioned  instrument  or currency is  delivered  upon  exercise  with the
result  that the  writer in such  circumstances  will be  subject to the risk of
market decline or appreciation in the instrument during such period.

     When the Portfolio  purchases an option, the premium paid by it is recorded
as an asset of the  Portfolio.  When the Portfolio  writes an option,  an amount
equal to the net  premium  (the  premium  less the  commission)  received by the
Portfolio is included in the liability  section of the Portfolio's  statement of
assets  and  liabilities  as a  deferred  credit.  The  amount of this  asset or
deferred  credit will be  subsequently  marked-to-market  to reflect the current
value of the option purchased or written. The current value of the traded option
is the last sale price or, in the absence of a sale,  the current bid price.  If
an option purchased by the Portfolio expires unexercised, the Portfolio realizes
a loss equal to the premium paid.  If the  Portfolio  enters into a closing sale
transaction  on an option  purchased by it, the Portfolio will realize a gain if
the premium  received by the Portfolio on the closing  transaction  is more than
the premium paid to purchase the option,  or a loss if it is less.  If an option
written by the Portfolio  expires on the  stipulated  expiration  date or if the
Portfolio enters into a closing purchase transaction, it will realize a gain (or
loss if the cost of a  closing  purchase  transaction  exceeds  the net  premium
received when the option is sold) and the deferred credit related to such option
will be  eliminated.  If an option  written by the Portfolio is  exercised,  the
proceeds of the sale will be  increased by the net premium  originally  received
and the Portfolio will realize a gain or loss.

     There are several  risks  associated  with  transactions  in  options.  For
example, there are significant differences between the securities,  currency and
options  markets  that could result in an imperfect  correlation  between  these
markets, causing a given transaction not to achieve its objectives. In addition,
a   liquid   secondary   market   for   particular   options,   whether   traded
over-the-counter  or on an exchange may be absent for reasons  which include the
following:  there may be  insufficient  trading  interest  in  certain  options;
restrictions  may be imposed by an exchange on opening  transactions  or closing
transactions or both;  trading halts,  suspensions or other  restrictions may be
imposed with respect to  particular  classes or series of options or  underlying
securities  or  currencies;  unusual or unforeseen  circumstances  may interrupt
normal  operations on an exchange;  the facilities of an exchange or the Options
Clearing  Corporation may not at all times be adequate to handle current trading
value; or one or more exchanges could, for economic or other reasons,  decide or
be  compelled  at some future date to  discontinue  the trading of options (or a
particular  class or series of options),  in which event the secondary market on
that  exchange  (or in that class or series of  options)  would  cease to exist,
although  outstanding  options  that had been  issued  by the  Options  Clearing
Corporation  as a  result  of  trades  on that  exchange  would  continue  to be
exercisable in accordance with their terms.

     Futures Contracts and Related Options.  The Portfolio may purchase and sell
futures  contracts  and may  purchase  and sell call and put  options on futures
contracts for hedging  purposes,  for speculative  purposes (to seek to increase
total return), or for liquidity management  purposes.  When used as a hedge, the
Portfolio  may sell a  futures  contract  in order to offset a  decrease  in the
market value of its  portfolio  securities  that might  otherwise  result from a
market decline or currency exchange fluctuations. The Portfolio may do so either
to hedge the value of its  portfolio  of  securities  as  whole,  or to  protect
against  declines,  occurring prior to sales of securities,  in the value of the
securities to be sold. Conversely, the Portfolio may purchase a futures contract
as a hedge  in  anticipation  of  purchases  of  securities.  In  addition,  the
Portfolio  may  utilize  futures  contracts  in  anticipation  of changes in the
composition  of its portfolio  holdings.  For a detailed  description of futures
contracts and related options, see Appendix B to this Additional Statement.

     Participation in foreign futures and foreign options transactions  involves
the  execution  and  clearing  of trades on or subject to the rules of a foreign
board of trade.  Neither  the  National  Futures  Association  nor any  domestic
exchange  regulates  activities  of any foreign  boards of trade,  including the
execution,  delivery  and clearing of  transactions,  or has the power to compel
enforcement of the rules of a foreign board of trade or any  applicable  foreign
law. This is true even if the exchange is formally  linked to a domestic  market
so that a position  taken on the market may be liquidated  by a  transaction  on
another market.  Moreover,  such laws or regulations  will vary depending on the
foreign  country in which the  foreign  futures or foreign  options  transaction
occurs. For these reasons,  persons who trade foreign futures or foreign options
contracts may not be afforded certain of the protective measures provided by the
Commodity  Exchange Act, the Commodity  Futures  Trading  Commission's  ("CFTC")
regulations and the rules of the National  Futures  Association and any domestic
exchange, including the right to use reparations proceedings before the CFTC and
arbitration proceedings provided them by the National Futures Association or any
domestic futures exchange. In particular, the Portfolio's investments in foreign
futures or foreign options transactions may not be provided the same protections
in respect of transactions on United States futures exchanges.  In addition, the
price of any foreign futures or foreign  options  contract and,  therefore,  the
potential profit and loss thereon may be affected by any variance in the foreign
exchange rate between the time an order is placed and the time it is liquidated,
offset or exercised. For a detailed description of futures contracts and related
options, see Appendix B to this Additional Statement.

     In  connection  with the  Portfolio's  position  in a futures  contract  or
related  option,  the Portfolio will  segregate  liquid assets or will otherwise
cover its position in accordance with applicable SEC requirements.

     The Trust intends to comply with the  regulations of the Commodity  Futures
Trading  Commission  exempting the Portfolio from  registration  as a "commodity
pool operator."

     Real Estate  Investment  Trusts.  The  Portfolio  may invest in equity real
estate investment  trusts ("REITs").  REITs pool investors' funds for investment
primarily in commercial real estate properties. Investments in REITs may subject
the Portfolio to certain risks. REITs may be affected by changes in the value of
the  underlying  property  owned  by  the  trusts.   REITs  are  dependent  upon
specialized  management  skill,  may not be  diversified  and are subject to the
risks  of  financing  projects.  REITs  are also  subject  to  heavy  cash  flow
dependency,  defaults by borrowers,  self  liquidation  and the  possibility  of
failing to qualify for the beneficial tax treatment available to REITs under the
Internal  Revenue Code of 1986, as amended,  and to maintain  exemption from the
1940 Act. As a shareholder in a REIT, the Portfolio would bear, along with other
shareholders,  its pro rata  portion of the  REIT's  operating  expenses.  These
expenses  would be in addition to the advisory and other  expenses the Portfolio
bears directly in connection with its own operations.

     Securities  Lending.  Collateral for loans of portfolio  securities made by
the  Portfolio  may  consist of cash,  cash  equivalents,  securities  issued or
guaranteed by the U.S. Government or its agencies or irrevocable bank letters of
credit (or any combination thereof). The borrower of securities will be required
to maintain the market value of the collateral at not less than the market value
of the loaned  securities,  and such value will be  monitored  on a daily basis.
When the Portfolio lends its securities,  it continues to receive  dividends and
interest on the securities  loaned and may  simultaneously  earn interest on the
investment of the cash collateral. Although voting rights, or rights to consent,
attendant to securities on loan pass to the borrower,  such loans will be called
so that the  securities  may be  voted  by the  Portfolio  if a  material  event
affecting the investment is to occur.

     Equity Swaps.  The Portfolio may enter into equity swap contracts to invest
in a  market  without  owning  or  taking  physical  custody  of  securities  in
circumstances  in which direct  investment is restricted for legal reasons or is
otherwise  impracticable.  Equity swaps may also be used for hedging purposes or
to seek to increase total return.  The  counterparty  to an equity swap contract
will typically be a bank, investment banking firm or broker/dealer.  Equity swap
contracts may be structured in different ways. For example,  a counterparty  may
agree to pay the Portfolio the amount,  if any, by which the notional  amount of
the equity swap contract  would have  increased in value had it been invested in
particular  stocks (or an index of stocks),  plus the dividends  that would have
been received on those stocks. In these cases, the Portfolio may agree to pay to
the  counterparty  the amount,  if any, by which that notional amount would have
decreased in value had it been invested in the stocks.  Therefore, the return to
the  Portfolio  on any equity  swap  contract  should be the gain or loss on the
notional  amount  plus  dividends  on the stocks less the  interest  paid by the
Portfolio  on the notional  amount.  In other cases,  the  counterparty  and the
Portfolio  may each agree to pay the other the  difference  between the relative
investment  performances that would have been achieved if the notional amount of
the equity swap  contract had been  invested in different  stocks (or indices of
stocks).

     The Portfolio will enter into equity swaps only on a net basis, which means
that the two payment  streams are netted out,  with the  Portfolio  receiving or
paying,  as the case may be, only the net amount of the two  payments.  Payments
may be made at the conclusion of an equity swap contract or periodically  during
its term.  Equity  swaps do not involve  the  delivery  of  securities  or other
underlying assets. Accordingly, the risk of loss with respect to equity swaps is
limited  to the net  amount of  payments  that the  Portfolio  is  contractually
obligated  to  make.  If  the  other  party  to an  equity  swap  defaults,  the
Portfolio's  risk of loss  consists  of the net  amount  of  payments  that  the
Portfolio  is  contractually  entitled  to  receive,  if any.  Inasmuch as these
transactions  are entered into for hedging  purposes or are offset by segregated
cash or liquid assets to cover the Portfolio's potential exposure, the Portfolio
and the Investment  Adviser believe that  transactions do not constitute  senior
securities  under the 1940 Act and,  accordingly,  will not treat  them as being
subject to the Portfolio's borrowing restrictions.

     The Portfolio will not enter into any equity swap  transactions  unless the
unsecured  commercial paper,  senior debt or claims-paying  ability of the other
party is rated either A or A-1 or better by Standard & Poor's,  Duff & Phelps or
Fitch IBCA, or A or P-1 or better by Moody's  Investors  Service.  If there is a
default  by the  other  party to such a  transaction,  the  Portfolio  will have
contractual remedies pursuant to the agreements related to the transaction.

     The use of equity swaps is a highly  specialized  activity  which  involves
investment  techniques and risks  different from those  associated with ordinary
portfolio securities transactions. If the Investment Adviser is incorrect in its
forecasts of market values, the investment performance of the Portfolio would be
less  favorable  than it would have been if this  investment  technique were not
used.

     Convertible  Securities.  Convertible  securities  entitle  the  holder  to
receive interest paid or accrued on debt or the dividend paid on preferred stock
until the convertible securities mature or are redeemed, converted or exchanged.
Prior to conversion,  convertible  securities  have  characteristics  similar to
ordinary debt securities in that they normally provide a stable stream of income
with  generally  higher yields than those of common stock of the same or similar
issuers.  Convertible  securities rank senior to common stock in a corporation's
capital   structure   and  therefore   generally   entail  less  risk  than  the
corporation's  common  stock,  although the extent to which such risk is reduced
depends in large measure upon the degree to which the convertible security sells
above its value as a fixed income security.

     In selecting convertible securities,  the Investment Adviser will consider,
among other factors: an evaluation of the creditworthiness of the issuers of the
securities;  the interest or dividend income  generated by the  securities;  the
potential for capital  appreciation of the securities and the underlying  common
stocks; the prices of the securities relative to other comparable securities and
to the  underlying  common  stocks;  whether the  securities are entitled to the
benefits of sinking funds or other protective conditions; diversification of the
Portfolio  securities as to issuers;  and whether the  securities are rated by a
rating agency and, if so, the ratings assigned.

     The value of convertible securities is a function of their investment value
(determined  by yield in  comparison  with the  yields  of other  securities  of
comparable  maturity and quality that do not have a  conversion  privilege)  and
their  conversion  value (their worth,  at market value,  if converted  into the
underlying  common  stock).  The investment  value of convertible  securities is
influenced by changes in interest  rates,  with  investment  value  declining as
interest rates  increase and  increasing as interest  rates decline,  and by the
credit  standing  of the  issuer  and other  factors.  The  conversion  value of
convertible  securities  is  determined  by the market  price of the  underlying
common stock. If the conversion  value is low relative to the investment  value,
the  price  of the  convertible  securities  is  governed  principally  by their
investment  value. To the extent the market price of the underlying common stock
approaches  or  exceeds  the  conversion  price,  the  price of the  convertible
securities  will be  increasingly  influenced  by  their  conversion  value.  In
addition,  convertible  securities  generally  sell  at  a  premium  over  their
conversion  value determined by the extent to which investors place value on the
right to  acquire  the  underlying  common  stock  while  holding  fixed  income
securities.

     Capital  appreciation  for the Portfolio may result from an  improvement in
the credit  standing of an issuer whose  securities are held in the Portfolio or
from a general lowering of interest rates, or a combination of both. Conversely,
a reduction in the credit standing of an issuer whose securities are held by the
Portfolio or a general  increase in interest  rates may be expected to result in
capital depreciation to the Portfolio.

     In general, investments in lower quality convertible securities are subject
to a significant risk of a change in the credit rating or financial condition of
the issuing  entity.  Investments in  convertible  securities of medium or lower
quality  are also  likely to be  subject to greater  market  fluctuation  and to
greater risk of loss of income and principal due to default than  investments of
higher quality fixed-income securities.  Such lower quality securities generally
tend to reflect short-term corporate and market developments to a greater extent
than higher quality securities,  which react more to fluctuations in the general
level of  interest  rates.  The  Portfolio  will  generally  reduce  risk to the
investor  by   diversification,   credit   analysis  and  attention  to  current
developments in trends of both the economy and financial markets. However, while
diversification reduces the effect on the Portfolio of any single investment, it
does not reduce the overall risk of investing in lower quality securities.

     Risks Related to Small Company  Securities.  While the  Investment  Adviser
believes  that smaller  companies  can provide  greater  growth  potential  than
larger,  more mature firms,  investing in the  securities of such companies also
involves greater risk, portfolio price volatility and cost. Historically,  small
capitalization  stocks, which will be the Portfolio's primary  investments,  and
stocks of recently organized companies,  in which the Portfolio may also invest,
have been more volatile in price than the larger  capitalization stocks included
in the S&P 500 Index.  Among the reasons for this greater price  volatility  are
the lower degree of market  liquidity  (the  securities of companies  with small
stock market  capitalizations  may trade less  frequently and in limited volume)
and the greater sensitivity of small companies to changing economic  conditions.
For example,  these companies are associated with higher  investment risk due to
the greater  business risks of small size and limited  product  lines,  markets,
distribution channels and financial and managerial resources.

     The values of small company stocks will frequently fluctuate  independently
of the values of larger  company  stocks.  Small  company  stocks may decline in
price as large  company  stock  prices rise,  or rise in price as large  company
stock prices decline. You should, therefore,  expect that the net asset value of
the   Portfolio's   shares  will  be  more  volatile  than,  and  may  fluctuate
independently of, broad stock market indices such as the S&P 500 Index.

     The  additional  costs  associated  with the  acquisition  of small company
stocks include  brokerage  costs,  market impact costs (that is, the increase in
market prices which may result when the Portfolio purchases thinly traded stock)
and the effect of the "bid-ask" spread in small company stocks. These costs will
be borne by all shareholders and may negatively impact investment performance.

     Risks Related to Medium and Lower Quality Securities. Investments in medium
and lower quality securities present special risk considerations. Medium quality
securities,  although  considered  investment grade, are also considered to have
speculative   characteristics.   Lower   quality   securities   are   considered
predominately  speculative by traditional  investment standards.  In some cases,
these obligations may be highly speculative and have poor prospects for reaching
investment grade standard. While any investment carries some risk, certain risks
associated   with  lower  quality   securities  are  different  from  those  for
investment-grade securities. The risk of loss through default is greater because
lower quality  securities are usually  unsecured and are often subordinate to an
issuer's  other  obligations.  Additionally,  the  issuers  of these  securities
frequently  have  high debt  levels  and are thus more  sensitive  to  difficult
economic  conditions,  individual  corporate  developments  and rising  interest
rates. Consequently,  the market price of these securities may be quite volatile
and may result in wider  fluctuations  of the  Portfolio's  net asset  value per
share.

     There remains some  uncertainty  about the performance  level of the market
for lower quality securities under adverse market and economic environments.  An
economic  downturn or increase in interest rates could have a negative impact on
both the markets for lower quality securities  (resulting in a greater number of
bond defaults) and the value of lower quality  securities held in a portfolio of
investments.

     The  economy  and  interest  rates  can  affect  lower  quality  securities
differently  than other  securities.  For example,  the prices of lower  quality
securities  are  more  sensitive  to  adverse  economic  changes  or  individual
corporate  developments  than are the prices of higher quality  investments.  In
addition,  during an  economic  downturn or period in which  interest  rates are
rising   significantly,   highly  leveraged  issuers  may  experience  financial
difficulties,  which, in turn,  would adversely  affect their ability to service
their principal and interest payment obligations,  meet projected business goals
and obtain additional financing.

     The market value of lower quality  securities  tends to reflect  individual
corporate  developments  to  a  greater  extent  than  that  of  higher  quality
securities  which  react  primarily  to  fluctuations  in the  general  level of
interest rates.  Lower quality  securities are often issued in connection with a
corporate reorganization or restructuring or as a part of a merger, acquisition,
takeover or similar event.  They are also issued by less  established  companies
seeking  to  expand.  Such  issuers  are often  highly  leveraged,  may not have
available to them more  traditional  methods of financing and are generally less
able than more established or less leveraged entities to make scheduled payments
of  principal  and  interest in the event of adverse  economic  developments  or
business conditions.

     A holder's  risk of loss from  default is  significantly  greater for lower
quality securities than is the case for holders of other debt securities because
such securities are generally unsecured and are often subordinated to the rights
of  other  creditors  of the  issuers  of  such  securities.  Investment  by the
Portfolio  in  defaulted   securities  poses  additional  risk  of  loss  should
nonpayment  of principal  and interest  continue in respect of such  securities.
Even if such  securities are held to maturity,  recovery by the Portfolio of its
initial investment and any anticipated income or appreciation will be uncertain.
The  Portfolio  may also incur  additional  expenses  in seeking  recovering  on
defaulted  securities.  If an issuer of a security  defaults,  the Portfolio may
incur  additional  expenses to seek recovery.  In addition,  periods of economic
uncertainty would likely result in increased volatility for the market prices of
lower quality securities as well as the Portfolio's net asset value. In general,
both the prices and yields of lower quality securities will fluctuate.

     The  secondary  market for lower  quality  securities  is  concentrated  in
relatively  few  market  makers and is  dominated  by  institutional  investors,
including mutual funds,  insurance  companies and other financial  institutions.
Accordingly,  the secondary  market for such securities is not as liquid as, and
is more volatile than, the secondary  market for higher quality  securities.  In
addition,  market  trading  volume for high yield  fixed  income  securities  is
generally  lower and the secondary  market for such  securities  could  contract
under adverse market or economic conditions, independent of any specific adverse
changes in the  condition  of a  particular  issuer.  These  factors may have an
adverse  effect on the market  price and the  Portfolio's  ability to dispose of
particular  portfolio  investments.  A less developed  secondary market may also
make it more  difficult  for the Portfolio to obtain  precise  valuations of the
high yield securities in its portfolio.

     Adverse  publicity  and  investor  perceptions,  whether  or not  based  on
fundamental  analysis,  may  decrease the value and  liquidity of lower  quality
convertible  securities  held by the  Portfolio,  especially  in a thinly traded
market.  Illiquid or  restricted  securities  held by the  Portfolio may involve
special registration responsibilities,  liabilities and costs, and could involve
other liquidity and valuation difficulties.

     The credit  ratings  assigned by a rating  agency  evaluate the safety of a
rated  security's  principal and interest  payments,  but do not address  market
value  risk  and,  therefore,  may  not  fully  reflect  the  true  risks  of an
investment.  Because the ratings of the rating  agencies may not always  reflect
current  conditions and events,  in addition to using recognized rating agencies
and other  sources,  the  Investment  Adviser  performs  its own analysis of the
issuers whose lower quality securities the Portfolio holds. Because of this, the
Portfolio's  performance  may depend  more on its  Investment  Adviser's  credit
analysis  than  is  the  case  of  mutual  funds  investing  in  higher  quality
securities.

     Investment  Companies.  With respect to the investments of the Portfolio in
the securities of other investment  companies,  such investments will be limited
so that, as determined after a purchase is made,  either (a) not more than 3% of
the total  outstanding  stock of such  investment  company  will be owned by the
Portfolio,  the Trust as a whole and their affiliated persons (as defined in the
1940 Act) or (b) (i) not more  than 5% of the  value of the total  assets of the
Portfolio will be invested in the securities of any one investment company; (ii)
not more than 10% of the  value of its  total  assets  will be  invested  in the
aggregate in securities of investment  companies as a group;  and (iii) not more
than 3% of the  outstanding  voting stock of any one investment  company will be
owned by the Portfolio.

     Certain  investment   companies  whose  securities  are  purchased  by  the
Portfolio may not be obligated to redeem such securities in an amount  exceeding
1% of the investment company's total outstanding securities during any period of
less than 30 days.  Therefore,  such  securities  that exceed this amount may be
illiquid.  Notwithstanding  the  foregoing,  the  Portfolio  may  adhere to more
restrictive  limitations with respect to its investments in securities issued by
other  investment  companies  if required by the SEC or deemed to be in the best
interests of the Trust.  If required by the 1940 Act, the  Portfolio  expects to
vote the shares of other  investment  companies  that are held by it in the same
proportion as the vote of all other holders of such securities.

     Yields and Ratings. The yields on certain obligations,  including the money
market instruments in which the Portfolio invests, are dependent on a variety of
factors,  including  general economic  conditions,  conditions in the particular
market  for the  obligation,  financial  condition  of the  issuer,  size of the
offering,  maturity of the obligation  and ratings of the issue.  The ratings of
Standard & Poor's,  Moody's,  Duff, Fitch and Thomson BankWatch,  Inc. represent
their respective opinions as to the quality of the obligations they undertake to
rate. Ratings,  however,  are general and are not absolute standards of quality.
Consequently,  obligations with the same rating,  maturity and interest rate may
have different  market prices.  For a more complete  discussion of ratings,  see
Appendix A to this Additional Statement.

     Subject to the limitations stated in the Prospectus,  if a security held by
the Portfolio  undergoes a rating  revision,  the Portfolio may continue to hold
the security if the Investment Adviser determines such retention is warranted.

     Stock   Indices.   The   Russell   2000  Small  Stock  Index  is  a  market
value-weighted  index  composed of the stocks of the smallest 2000  companies in
the  Russell  3000  Index,  which is  composed  of the stocks of 3000 large U.S.
domiciled   companies   (based  on   market   capitalization)   that   represent
approximately 98% of the investable U.S. equity markets. Because of its emphasis
on the smallest 2000 companies,  the Russell Index represents  approximately 10%
of the total market  capitalization  of the Russell 3000 Index.  As of September
30, 1999, the average  market  capitalization  of the companies  included in the
Russell  Index  was   approximately   $_____  million.   The  Russell  Index  is
reconstituted annually to reflect changes in market capitalization.  The primary
criteria  used by Frank Russell & Company  ("Russell")  to determine the initial
list of  securities  eligible  for  inclusion  in the  Russell  3000  Index (and
accordingly,  the Russell  Index) is total  market  capitalization  adjusted for
large private holdings and cross-ownership.  However, companies are not selected
by Russell for  inclusion in the Russell Index because they are expected to have
superior  stock  price  performance  relative  to the market in general or other
stocks in particular.  Russell makes no representation  or warranty,  implied or
express, to purchasers of Portfolio shares or any member of the public regarding
the  advisability  of investing  in the  Portfolio or the ability of the Russell
Index to track general market performance of small capitalization stocks.

     Calculation Of Portfolio Turnover Rate. The portfolio turnover rate for the
Portfolio  is  calculated  by  dividing  the  lesser  of  purchases  or sales of
portfolio  investments for the reporting  period by the monthly average value of
the portfolio  investments  owned during the reporting  period.  The calculation
excludes all securities, including options, whose maturities or expiration dates
at the time of  acquisition  are one year or less.  Portfolio  turnover may vary
greatly  from  year to year as well as  within  a  particular  year,  and may be
affected by, changes in the holdings of specific issuers, changes in country and
currency  weightings,   cash  requirements  for  redemption  of  shares  and  by
requirements which enable the Portfolio to receive favorable tax treatment.  The
Portfolio had not commenced operations during the fiscal year ended November 30,
1998.  The  Portfolio  is not  restricted  by policy  with  regard to  portfolio
turnover and will make changes in its investment  portfolio from time to time as
business and economic conditions as well as market prices may dictate.

     Miscellaneous.  Securities  may be  purchased on margin only to obtain such
short-term  credits as are necessary for the clearance of purchases and sales of
securities.  The  Portfolio  will not engage in selling  securities  short.  The
Portfolio may, however,  make short sales against the box although the Portfolio
has no current intention to do so in the coming year. "Selling short against the
box"  involves  selling a security  that the  Portfolio  owns for  delivery at a
specified date in the future.

                             INVESTMENT RESTRICTIONS

     The  Portfolio  is  subject  to  the  fundamental  investment  restrictions
enumerated  below  which  may be  changed  only  by a vote of the  holders  of a
majority of the Portfolio's outstanding shares.

The Portfolio may not:

     (1) Make  loans,  except (a) through the  purchase of debt  obligations  in
     accordance  with the  Portfolio's  investment  objective and policies,  (b)
     through  repurchase  agreements  with  banks,  brokers,  dealers  and other
     financial institutions, and (c) loans of securities.

     (2)  Mortgage,  pledge or  hypothecate  any assets  (other than pursuant to
     reverse repurchase agreements) except to secure permitted borrowings.

     (3) Purchase or sell real estate or real estate limited  partnerships,  but
     this restriction shall not prevent the Portfolio from investing directly or
     indirectly  in  portfolio  instruments  secured by real estate or interests
     therein or acquiring  securities of real estate  investment trusts or other
     issuers that deal in real estate.

     (4) Purchase or sell  commodities  or commodity  contracts or oil or gas or
     other mineral  exploration or development  programs or leases,  except that
     the Portfolio may, to the extent  appropriate  to its investment  policies,
     purchase  securities  of  companies  engaging  in  whole or in part in such
     activities,  and may enter into futures  contracts and related  options and
     forward  currency  exchange  contracts in  accordance  with its  investment
     objective and policies.

     (5) Invest in companies for the purpose of exercising control.

     (6) Act as underwriter of securities, except as the Portfolio may be deemed
     to be an  underwriter  under the Securities Act of 1933 (the "1933 Act") in
     connection  with  the  purchase  and  sale  of  portfolio   instruments  in
     accordance with its investment objective and portfolio management policies.

     (7) Write puts, calls or combinations  thereof,  except for transactions in
     options on  securities,  financial  instruments,  currencies and indices of
     securities;  futures  contracts;  options  on  futures  contracts;  forward
     currency  contracts;  short sales of securities  against the box;  interest
     rate swaps; and pair-off transactions.  (This restriction does not apply to
     any type of option, futures contract, forward contract, short sale, swap or
     pair-off  transaction unless it involves a put, call or combination thereof
     written by the Portfolio.)

     (8) Make any investment inconsistent with the Portfolio's classification as
     a diversified investment company under the 1940 Act.

     (9) Purchase securities (other than obligations issued or guaranteed by the
     U.S. Government,  its agencies or instrumentalities and securities of other
     investment  companies)  if such  purchase  would cause more than 25% in the
     aggregate of the market  value of the total  assets of the  Portfolio to be
     invested in the  securities of one or more issuers  having their  principal
     business  activities  in the  same  industry.  For  the  purposes  of  this
     restriction,  as  to  utility  companies,  the  gas,  electric,  water  and
     telephone  businesses are considered separate  industries;  personal credit
     finance  companies and business  credit finance  companies are deemed to be
     separate  industries;  and wholly-owned finance companies are considered to
     be in the  industries  of their parents if their  activities  are primarily
     related to financing the activities of their parents.

     (10) Borrow money (other than pursuant to reverse  repurchase  agreements),
     except (a) as a temporary  measure,  and then only in amounts not exceeding
     5% of the value of the Portfolio's total assets or (b) from banks, provided
     that  immediately  after any such borrowing all borrowings of the Portfolio
     do not exceed  one-third of the Portfolio's  total assets.  No purchases of
     securities will be made if borrowings subject to this restriction exceed 5%
     of the value of the  Portfolio's  assets.  The exceptions in (a) and (b) to
     this  restriction are not for investment  leverage  purposes but are solely
     for extraordinary or emergency purposes or to facilitate  management of the
     Portfolio  by  enabling  the  Trust to meet  redemption  requests  when the
     liquidation of Portfolio instruments is deemed to be disadvantageous or not
     possible.  If due to market  fluctuations or other reasons the total assets
     of the Portfolio fall below 300% of its borrowings, the Trust will promptly
     reduce the borrowings of the Portfolio in accordance with the 1940 Act.

     (11)  Notwithstanding  any  of the  Trust's  other  fundamental  investment
     restrictions (including, without limitation, those restrictions relating to
     issuer diversification,  industry concentration and control), the Portfolio
     may purchase  securities of other  investment  companies to the full extent
     permitted  under  Section  12 of the 1940 Act (or any  successor  provision
     thereto) or under any  regulation or order of the  Securities  and Exchange
     Commission;  and the Portfolio may invest all or  substantially  all of its
     assets in a single  open-end  investment  company  or series  thereof  with
     substantially  the same  investment  objective,  policies  and  fundamental
     restrictions as the Portfolio.

     In applying  Restriction No. 9 above, a security is considered to be issued
by the entity,  or  entities,  whose assets and revenues  back the  security.  A
guarantee of a security is not deemed to be a security  issued by the  guarantor
when the value of all securities  issued and  guaranteed by the  guarantor,  and
owned by the  Portfolio,  does not  exceed  10% of the value of the  Portfolio's
total assets.

     Except to the extent otherwise provided in Investment Restriction No. 9 for
the purpose of such  restriction,  in determining  industry  classification  the
Trust  intends  to use  the  industry  classification  titles  in  the  Standard
Industrial Classification Manual. Securities held in escrow or separate accounts
in  connection  with the  Portfolio's  investment  practices  described  in this
Additional  Statement  and in the  Prospectus  are not  deemed to be  mortgaged,
pledged or hypothecated for purposes of the foregoing Investment Restrictions.

     In addition,  as a matter of  fundamental  policy,  the Portfolio  will not
issue senior  securities  except as stated in the Prospectus or this  Additional
Statement.

     Any restriction which involves a maximum  percentage will not be considered
violated unless an excess over the percentage occurs  immediately  after, and is
caused  by, an  acquisition  or  encumbrance  of  securities  or  assets  of, or
borrowings by, the Portfolio.

                          ADDITIONAL TRUST INFORMATION

TRUSTEES AND OFFICERS

     The business and affairs of the Trust and the  Portfolio  are managed under
the  direction of the Trust's Board of Trustees.  Information  pertaining to the
Trustees and officers of the Trust is set forth below.
<TABLE>
<CAPTION>
<S><C>                       <C>         <C>                   <C>

NAME                                    POSITION(S)             PRINCIPAL OCCUPATION(S)
AND ADDRESS                   AGE       WITH TRUST              DURING PAST 5 YEARS

William H. Springer           69        Chairman and            Director of Walgreen Co. (a retail drug
701 Morningside Drive                   Trustee                 store business) since 1988; Director of
Lake Forest, IL 60045                                           Baker, Fentress & Co. (a closed-end,
                                                                non-diversified management investment
                                                                company) since 1992; Trustee of Goldman
                                                                Sachs Trust since 1989.

Richard Gordon Cline          64        Trustee                 Chairman and Director of Hussman
4200 Commerce Court,                                            International Inc. (commercial refrigeration
Suite 300                                                       company) since January 1998; Chairman of
Lisle, IL 60532                                                 Hawthorne Inc. (a management advisory
                                                                services and private investment company)
                                                                since January 1996; Chairman, President and
                                                                CEO of NICOR Inc. (a diversified public
                                                                utility holding company) from 1985 to 1996;
                                                                Chairman and Director of the Federal Reserve
                                                                Bank of Chicago from 1992 to 1995; Director
                                                                of Central DuPage Health System, Pet
                                                                Incorporated, Whitman Corporation (a
                                                                diversified holding company), Kmart
                                                                Corporation (a retailing company), Ryerson
                                                                Tull, Inc. (a metals distribution company)
                                                                and University of Illinois Foundation.

NAME                                    POSITION(S)             PRINCIPAL OCCUPATION(S)
AND ADDRESS                   AGE       WITH TRUST              DURING PAST 5 YEARS

Edward J. Condon, Jr.         58        Trustee                 Chairman and CEO of The Paradigm Group, Ltd.
Sear Tower, Suite 9650                                          (a financial advisor) since July 1993;
233 S. Wacker Drive                                             within the last five years he has served as:
Chicago, IL 60606                                               Vice Chairman and Director of Energenics
                                                                L.L.C.; Director of Financial Pacific
                                                                Company; Member of the Board of Managers of
                                                                The Liberty Hampshire Company, LLC; Member
                                                                of Advisory Board of Real-Time USA, Inc.;
                                                                Member of the Board of Directors of
                                                                University Eldercare, Inc.; Member of the
                                                                Board of Directors of the Girl Scouts of
                                                                Chicago; and Member of the Board of Trustees
                                                                of Dominican University.

John W. English               66        Trustee                 Private Investor since 1993; Vice President
50-H New England Ave.                                           and Chief Investment Officer of The Ford
P.O. Box 640                                                    Foundation (a charitable trust) from 1981 to
Summit, NJ 07902-0640                                           1993; Trustee of The China Fund, Inc.,
                                                                American Red Cross in Greater New York, Mote
                                                                Marine Laboratory, State Street's Select
                                                                Sector SPDR Trust, Washington Mutual's WM
                                                                Funds and United Board for Christian Higher
                                                                Education in Asia.  Director of University
                                                                of Iowa Foundation, Blanton-Peale Institutes
                                                                of Religion and Health, Community Foundation
                                                                of Sarasota County and Duke Management
                                                                Company.

Sandra Polk Guthman           55        Trustee                 President and CEO of Polk Bros. Foundation
420 N. Wabash Avenue                                            (an Illinois not-for-profit corporation)
Suite 204                                                       from 1993 to present; Director of Business
Chicago, IL 60611                                               Transformation from 1992-1993 and Midwestern
                                                                Director of Marketing from 1988-1992 for IBM
                                                                Corporation; Director of MBIA Insurance
                                                                Corporation of Illinois (bank holding
                                                                company) since 1994 and Avondale Financial
                                                                Corporation (a stock savings and loan
                                                                holding company) since 1995.


NAME                                    POSITION(S)             PRINCIPAL OCCUPATION(S)
AND ADDRESS                   AGE       WITH TRUST              DURING PAST 5 YEARS

Frederick T. Kelsey           71        Trustee                 Consultant to Goldman Sachs from December
3133 Laughing Gull Court                                        1985 through February 1988; Director of
Johns Island, SC    29455                                       Goldman Sachs Funds Group and Vice President
                                                                of Goldman Sachs from May 1981 until his
                                                                retirement in November 1985; President and
                                                                Treasurer of the Trust and other investment
                                                                companies affiliated with Goldman Sachs
                                                                through August 1985; President from 1983 to
                                                                1985 and Trustee from 1983 to 1994 of The
                                                                Centerland Funds and its successor, The
                                                                Pilot Funds; Trustee of various management
                                                                investment companies affiliated with Zurich
                                                                Kemper Investments.

Richard P. Strubel            59        Trustee                 Managing Director of Tandem Partners, Inc.
737 N. Michigan Avenue                                          (a privately held management services firm)
Suite 1405                                                      since 1990; President and CEO of Microdot,
Chicago, IL 60611                                               Inc. (a privately held manufacturing firm)
                                                                from January 1984 to October 1994; Trustee
                                                                of Goldman Sachs Trust from 1987 to present;
                                                                Director of Kaynar Technologies Inc. (a
                                                                leading manufacturer of aircraft fasteners)
                                                                since March 1997; Trustee of the University
                                                                of Chicago; Director of Children's Memorial
                                                                Medical Center.
Jylanne M. Dunne              39        President               Senior Vice President for Distribution
4400 Computer Drive                                             Services at First Data Investor Services
Westborough, MA 01581                                           Group, Inc. ("FDISG") (since 1988).

Richard H. Rose               43        Vice President          Vice President and Division Manager of
4400 Computer Drive                                             Mutual Fund Administration at FDISG (since
Westborough, MA 01581                                           1994); Senior Vice President at The Boston
                                                                Company Advisors, Inc. (prior thereto).

Brian R. Curran               31        Treasurer               Director of Fund Administration and
4400 Computer Drive                                             Accounting at FDISG (since 1997); Director
Westborough, MA 01581                                           of Fund Administration at State Street Bank
                                                                (February 1997 to October 1997); Senior
                                                                Auditor at Price Waterhouse L.L.P. (February
                                                                1994 to February 1997); Manager of Fund
                                                                Accounting at State Street Bank (prior
                                                                thereto).

Linda J. Hoard                51        Secretary               Counsel at FDISG (since 1998); Attorney
4400 Computer Drive                                             Consultant for Fidelity Investments,
Westborough, MA 01581                                           Investors Bank & Trust Company and FDISG
                                                                (September 1994 to June 1998); Vice
                                                                President and Assistant General Counsel at
                                                                MFS Investment Management (prior thereto).

NAME                                    POSITION(S)             PRINCIPAL OCCUPATION(S)
AND ADDRESS                   AGE       WITH TRUST              DURING PAST 5 YEARS

Teresa M.R. Hamlin            34        Assistant               Counsel at FDISG (since 1994); Paralegal
4400 Computer Drive                     Secretary               Manager at The Boston Company Advisors, Inc.
Westborough, MA 01581                                           (prior thereto).

Therese Hogan                 36        Assistant               Director of the State Regulation Department
4400 Computer Drive                     Secretary               at FDISG (since 1994); Senior Legal
Westborough, MA 01581                                           Assistant at Palmer and Dodge (prior
                                                                thereto).

</TABLE>

     Certain of the Trustees and officers and the organizations  with which they
are associated  have had in the past,  and may have in the future,  transactions
with the Investment Adviser, First Data Investor Services Group, Inc. ("FDISG"),
a wholly-owned  subsidiary of First Data Corporation,  First Data  Distributors,
Inc., a subsidiary of FDISG,  ("FDDI" and collectively with FDISG, "First Data")
and their respective affiliates. The Trust has been advised by such Trustees and
officers  that all such  transactions  have been and are  expected  to be in the
ordinary  course of business and the terms of such  transactions,  including all
loans and loan  commitments  by such  persons,  have been and are expected to be
substantially  the same as the prevailing terms for comparable  transactions for
other customers.  As a result of the responsibilities  assumed by the Investment
Adviser under the Advisory  Agreement for the  Portfolio,  by Northern under its
Transfer Agency Agreement,  Custodian Agreement, and Co-Administration Agreement
with the Trust,  by FDISG under its  Co-Administration  Agreement with the Trust
and by FDDI under its  Distribution  Agreement with the Trust,  the Trust itself
requires no employees.

     Each officer  holds  comparable  positions  with certain  other  investment
companies of which First Data or an affiliate thereof is the investment adviser,
administrator and/or distributor.

     Each Trustee  earns a quarterly  retainer of $6,750 and the Chairman of the
Board  earns a  quarterly  retainer  of $10,125.  Each  Trustee,  including  the
Chairman  of the  Board,  earns an  additional  fee of $2,500  for each  meeting
attended, plus reimbursement of expenses incurred as a Trustee.

     In addition, the Trustees have established an Audit Committee consisting of
three members including a Chairman of the Committee. The Audit Committee members
are Messrs.  Condon,  Kelsey and Strubel (Chairman).  Each member earns a fee of
$2,500 for each meeting attended and the Chairman earns a quarterly  retainer of
$1,500.

     Each Trustee will hold office for an indefinite  term until the earliest of
(1) the  next  meeting  of  shareholders  if any,  called  for  the  purpose  of
considering  the election or  re-election of such Trustee and until the election
and qualification of his or her successor,  if any, elected at such meeting; (2)
the date a Trustee  resigns or retires,  or a Trustee is removed by the Board of
Trustees  or  shareholders,   in  accordance  with  the  Trust's  Agreement  and
Declaration of Trust, or (3) in accordance  with the current  resolutions of the
Board of Trustees (which may be changed without  shareholder  vote), on the last
day of the  fiscal  year of the Trust in which he or she  attains  the age of 72
years.

     The Trust's  officers do not  receive  fees from the Trust for  services in
such capacities,  although FDISG, of which they are also officers, receives fees
from the Trust for administrative services.

     The  following  table sets forth  certain  information  with respect to the
compensation of each Trustee of the Trust for the one-year period ended November
30, 1998:
<TABLE>
<CAPTION>
<S><C>                           <C>                           <C>                                   <C>

                                  Aggregate Compensation        Pension or Retirement Benefits       Total Compensation From Trust
                                  from the Trust                Accrued as a Part of Trust's         Paid
Name of Trustee                                                 Expenses                             to Trustees

William H. Springer               $46,750                       N/A                                  $46,750
Richard G. Cline                  $34,000                       N/A                                  $34,000
Edward J. Condon, Jr.             $37,000                       N/A                                  $37,000
John W. English                   $32,500                       N/A                                  $32,500
Sandra Polk Guthman               $34,000                       N/A                                  $34,000
Frederick T. Kelsey               $37,000                       N/A                                  $37,000
Richard P. Strubel                $42,250                       N/A                                  $42,250
</TABLE>

Investment Adviser, Transfer Agent and Custodian

     Northern, a wholly-owned  subsidiary of Northern Trust Corporation,  a bank
holding  company,  is  one  of the  nation's  leading  providers  of  trust  and
investment  management services (the "Investment  Adviser").  Northern is one of
the strongest banking  organizations in the United States.  Northern believes it
has built its  organization by serving  clients with integrity,  a commitment to
quality,  and  personal  attention.  Its stated  mission with respect to all its
financial  products and services is to achieve  unrivaled  client  satisfaction.
With  respect to such  clients,  the Trust is  designed  to assist  (i)  defined
contribution  plan  sponsors and their  employees by offering a range of diverse
investment  options to help comply with 404(c)  regulation  and may also provide
educational   material  to  their   employees,   (ii)   employers   who  provide
post-retirement   Employees'  Beneficiary   Associations  ("VEBA")  and  require
investments that respond to the impact of federal  regulations,  (iii) insurance
companies with the day-to-day  management of uninvested cash balances as well as
with  longer-term  investment  needs,  and (iv)  charitable  and  not-for-profit
organizations,   such  as  endowments  and  foundations,   demanding  investment
management  solutions that balance the requirement for sufficient current income
to meet operating expenses and the need for capital  appreciation to meet future
investment objectives.  As of September 30, 1999, the Investment Adviser and its
affiliates had approximately $___ billion in assets under management for clients
including public and private retirement funds, endowments,  foundations, trusts,
corporations, other investment companies and individuals.

     Subject to the general supervision of the Board of Trustees, the Investment
Adviser makes decisions with respect to, and place orders for, all purchases and
sales of portfolio securities for the Portfolio. The Advisory Agreement with the
Trust  provides  that in  selecting  brokers  or  dealers  to place  orders  for
transactions (a) on common and preferred  stocks,  the Investment  Adviser shall
use its best  judgment to obtain the best overall  terms  available,  and (b) on
bonds and other fixed income  obligations,  the Investment Adviser shall attempt
to obtain best net price and  execution.  In assessing  the best  overall  terms
available for any transaction, the Investment Adviser is to consider all factors
it deems  relevant,  including  the breadth of the market in the  security,  the
price of the security,  the financial condition and execution  capability of the
broker or dealer, and the reasonableness of the commission, if any, both for the
specific  transaction and on a continuing  basis. In evaluating the best overall
terms  available  and in selecting  the broker or dealer to execute a particular
transaction,  the  Investment  Adviser may consider the  brokerage  and research
services  provided  to the  Portfolio  and/or  other  accounts  over  which  the
Investment Adviser or an affiliate of Northern exercises investment  discretion.
A broker or dealer providing  brokerage  and/or research  services may receive a
higher  commission  than  another  broker or dealer  would  receive for the same
transaction.  These  brokerage  and research  services may include  industry and
company analyses,  portfolio  services,  quantitative  data, market  information
systems and economic and political consulting and analytical services.

     Transactions  on U.S.  stock  exchanges  involve the payment of  negotiated
brokerage  commissions.  On exchanges on which  commissions are negotiated,  the
cost of transactions may vary among different  brokers.  Transactions on foreign
stock exchanges  involve payment for brokerage  commissions  which are generally
fixed.   Over-the-counter   issues,  including  corporate  debt  and  government
securities,  are  normally  traded on a "net" basis (i.e.,  without  commission)
through dealers, or otherwise involve  transactions  directly with the issuer of
an instrument.  With respect to  over-the-counter  transactions,  the Investment
Adviser  will  normally  deal  directly  with  dealers  who make a market in the
instruments  involved except in those  circumstances where more favorable prices
and  execution  are  available  elsewhere.  The  cost of  foreign  and  domestic
securities  purchased from underwriters  includes an underwriting  commission or
concession,  and the prices at which  securities  are purchased from and sold to
dealers include a dealer's mark-up or mark-down.

     The Portfolio may participate,  if and when practicable, in bidding for the
purchase  of  portfolio  securities  directly  from an  issuer  in order to take
advantage of the lower purchase  price  available to members of a bidding group.
The Portfolio  will engage in this practice,  however,  only when the Investment
Adviser believes such practice to be in the Portfolio's interests.

     On occasions  when the  Investment  Adviser deems the purchase or sale of a
security to be in the best interests of the Portfolio as well as other fiduciary
or agency  accounts  managed by it (including  any other  portfolio,  investment
company  or  account  for which the  Investment  Adviser  act as  adviser),  the
Advisory Agreement provides that the Investment Adviser, to the extent permitted
by applicable laws and  regulations,  may aggregate the securities to be sold or
purchased  for the  Portfolio  with those to be sold or purchased for such other
accounts in order to obtain best overall terms  available with respect to common
and preferred  stock, and best net price and execution with respect to bonds and
other fixed income obligations.  In such event,  allocation of the securities so
purchased or sold, as well as the expenses incurred in the transaction,  will be
made by the  Investment  Adviser in the manner it considers to be most equitable
and  consistent  with its  fiduciary  obligations  to the  Portfolio  and  other
accounts  involved.  In some instances,  this procedure may adversely affect the
size  of  the  position  obtainable  for  the  Portfolio  or the  amount  of the
securities that are able to be sold for the Portfolio.

     The Advisory  Agreement  provides  that the  Investment  Adviser may render
similar  services to others so long as its services under such Agreement are not
impaired  thereby.  The Advisory  Agreement  also  provides  that the Trust will
indemnify  the  Investment  Adviser  against  certain   liabilities   (including
liabilities  under the Federal  securities laws relating to untrue statements or
omissions of material fact and actions that are in accordance  with the terms of
the Agreement) or, in lieu thereof, contribute to resulting losses.

     Under its Transfer Agency Agreement with the Trust,  with respect to shares
held by  Institutions,  Northern  has  undertaken  to perform some or all of the
following services: (1) establish and maintain an omnibus account in the name of
each  Institution;  (2) process purchase orders and redemption  requests from an
Institution, and furnish confirmations and disburse redemption proceeds; (3) act
as the  income  disbursing  agent  of  the  Trust;  (4)  answer  inquiries  from
Institutions;  (5) provide periodic  statements of account to each  Institution;
(6) process and record the issuance and redemption of shares in accordance  with
instructions  from  the  Trust or its  administrator;  (7) if  required  by law,
prepare and forward to Institutions  shareholder  communications  (such as proxy
statements  and  proxies,  annual  and  semi-annual  financial  statements,  and
dividend,  distribution  and tax  notices);  (8) preserve  all records;  and (9)
furnish  necessary  office space,  facilities and personnel.  Under the Transfer
Agency  Agreement,  with respect to shares held by investors,  Northern has also
undertaken to perform some or all of the following  services:  (1) establish and
maintain  separate  accounts in the name of the investors;  (2) process purchase
orders and redemption  requests,  and furnish  confirmations  in accordance with
applicable  law; (3) disburse  redemption  proceeds;  (4) process and record the
issuance and redemption of shares in accordance with instructions from the Trust
or its  administrator;  (5) act as  income  disbursing  agent  of the  Trust  in
accordance with the terms of the Prospectus and  instructions  from the Trust or
its  administrator;  (6) provide  periodic  statements  of  account;  (7) answer
inquiries  (including  requests for  prospectuses  and  statements of additional
information,  and assistance in the completion of new account applications) from
investors and respond to all requests for information  regarding the Trust (such
as current price, recent performance,  and yield data) and questions relating to
accounts of investors (such as possible errors in statements, and transactions);
(8) respond to and seek to resolve all  complaints of investors  with respect to
the Trust or their accounts;  (9) furnish proxy  statements and proxies,  annual
and semi-annual financial statements, and dividend, distribution and tax notices
to investors;  (10) furnish the Trust with all pertinent  Blue Sky  information;
(11) perform all required  tax  withholding;  (12)  preserve  records;  and (13)
furnish necessary office space,  facilities and personnel.  Northern may appoint
one or more sub-transfer agents in the performance of its services.

     As  compensation  for the services  rendered by Northern under the Transfer
Agency Agreement and the assumption by Northern of related expenses, Northern is
entitled to a fee from the Trust,  payable  monthly,  at an annual rate of .01%,
 .10% and .15% of the  average  daily  net  asset  value of the  Class A, C and D
Shares, respectively, of the Portfolio.

     Under  its  Custodian  Agreement  with the  Trust,  Northern  (1) holds the
Portfolio's  cash and  securities,  (2)  maintains  such cash and  securities in
separate  accounts  in the  name  of  the  Portfolio,  (3)  makes  receipts  and
disbursements  of funds on behalf of the Portfolio,  (4) receives,  delivers and
releases  securities on behalf of the  Portfolio,  (5) collects and receives all
income,  principal and other payments in respect of the Portfolio's  investments
held by Northern under the Agreement,  and (6) maintains the accounting  records
of the  Trust.  Northern  may employ one or more  subcustodians,  provided  that
Northern,  subject to certain  monitoring  responsibilities,  shall have no more
responsibility or liability to the Trust on account of any action or omission of
any subcustodian so employed than such subcustodian has to Northern and that the
responsibility or liability of the subcustodian to Northern shall conform to the
resolution  of the  Trustees of the Trust  authorizing  the  appointment  of the
particular subcustodian (or, in the case of foreign securities,  to the terms of
any agreement  entered into between Northern and such subcustodian to which such
resolution relates).  In addition,  the Trust's custodial  arrangements provide,
with respect to foreign securities,  that Northern shall not be: (i) responsible
for the solvency of any subcustodian  appointed by it with reasonable care; (ii)
responsible for any act,  omission,  default or for the solvency of any eligible
foreign  securities  depository;  and (iii) liable for any loss,  damage,  cost,
expense,  liability  or claim  resulting  from  nationalization,  expropriation,
currency  restrictions,  or acts  of war or  terrorism  or any  loss  where  the
subcustodian has otherwise exercised  reasonable care. Northern may also appoint
agents  to carry  out  such of the  provisions  of the  Custodian  Agreement  as
Northern may from time to time direct, provided that the appointment of an agent
shall not relieve Northern of any of its  responsibilities  under the Agreement.
Northern  has  entered  into   agreements   with  financial   institutions   and
depositories  located in foreign  countries  with  respect to the custody of the
Portfolio's foreign securities.

     As  compensation  for the  services  rendered  to the Trust by  Northern as
custodian  with  respect to the  Portfolio,  and the  assumption  by Northern of
certain  related  expenses,  Northern is  entitled to payment  from the Trust as
follows:  (i)  $18,000  annually  for the  Portfolio,  plus (ii)  1/100th  of 1%
annually of the  Portfolio's  average  daily net assets to the extent it exceeds
$100  million,  plus  (iii) a fixed  dollar  fee for  each  trade  in  portfolio
securities,  plus  (iv) a fixed  dollar  fee for  each  time  that  Northern  as
Custodian  receives  or  transmits  funds via wire,  plus (v)  reimbursement  of
expenses incurred by Northern as custodian for telephone, postage, courier fees,
office supplies and duplicating.  The fees referred to in clauses (iii) and (iv)
are subject to annual  upward  adjustments  based on  increases  in the Consumer
Price Index for All Urban  Consumers,  provided that Northern may permanently or
temporarily waive all or any portion of any upward adjustment.

     Northern's  fees under the  Custodian  Agreement  are subject to  reduction
based on the Portfolio's daily uninvested cash balances (if any).

     Unless sooner terminated,  the Advisory Agreement,  the Custodian Agreement
and the Transfer  Agency  Agreement  will continue in effect with respect to the
Portfolio until April 30, 2000 and thereafter for successive  12-month  periods,
provided that the continuance is approved at least annually (1) by the vote of a
majority of the  Trustees who are not parties to the  agreement  or  "interested
persons" (as such term is defined in the 1940 Act) of any party thereto, cast in
person at a meeting called for the purpose of voting on such  approval,  and (2)
by the  Trustees or by the vote of a majority of the  outstanding  shares of the
Portfolio  (as defined  below under  "Other  Information").  Each  agreement  is
terminable  at any time without  penalty by the Trust (by  specified  Trustee or
shareholder action) on 60 days' written notice to Northern and by Northern on 60
days' written notice to the Trust.

     Banking laws and  regulations  currently  prohibit a bank  holding  company
registered  under the Federal  Bank  Holding  Company Act of 1956 or any bank or
non-bank   affiliate  thereof  from  sponsoring,   organizing,   controlling  or
distributing the shares of a registered open-end investment company continuously
engaged in the issuance of its shares,  but such banking laws and regulations do
not prohibit such a holding  company or affiliate or banks generally from acting
as  investment  adviser,  transfer  agent  or  custodian  to such an  investment
company,  or from purchasing  shares of such a company as agent for and upon the
order  of  customers.  Northern  believes  that  it  may  perform  the  services
contemplated by its agreements with the Trust without  violation of such banking
laws or  regulations,  which are applicable to it. It should be noted,  however,
that future changes in either Federal or state statutes and regulations relating
to the permissible activities of banks and their subsidiaries or affiliates,  as
well as future  judicial  or  administrative  decisions  or  interpretations  of
current  and future  statutes  and  regulations,  could  prevent  Northern  from
continuing to perform such services for the Trust.

     Should future  legislative,  judicial or administrative  action prohibit or
restrict the activities of Northern in connection with the provision of services
on behalf of the Trust,  the Trust  might be  required  to alter  materially  or
discontinue its arrangements  with Northern and change its method of operations.
It is not  anticipated,  however,  that any  change  in the  Trust's  method  of
operations would affect the net asset value per share of the Portfolio or result
in a  financial  loss to any  shareholder.  Moreover,  if  current  restrictions
preventing  a  bank  from  legally   sponsoring,   organizing,   controlling  or
distributing  shares of an open-end  investment company were relaxed,  the Trust
expects that  Northern and its  affiliates  would  consider the  possibility  of
offering to perform some or all of the  services now provided by First Data.  It
is not possible, of course, to predict whether or in what form such restrictions
might be relaxed or the terms upon which Northern and its affiliates might offer
to provide services for consideration by the Trustees.

     Under a Service  Mark  License  Agreement  with the Trust,  Northern  Trust
Corporation has agreed that the name "Northern  Institutional Funds" may be used
in connection with the Trust's business on a royalty-free basis.  Northern Trust
Corporation has reserved to itself the right to grant the non-exclusive right to
use the name "Northern  Institutional  Funds" to any other person. The Agreement
provides  that at such time as the  Agreement is no longer in effect,  the Trust
will cease using the name "Northern Institutional Funds."

Portfolio Transactions

     To the extent that the Portfolio effects brokerage  transactions with First
Data or any broker/dealer  affiliated directly or indirectly with the Investment
Adviser, such transactions,  including the frequency thereof, the receipt of any
commissions payable in connection therewith, and the selection of the affiliated
broker/dealer  effecting such  transactions,  will be fair and reasonable to the
shareholders of the Portfolio.

Portfolio Valuation

     U.S. and foreign  investments  held by the Portfolio are valued at the last
quoted  sales  price on the  exchange  on which such  securities  are  primarily
traded,  except that securities  listed on an exchange in the United Kingdom are
valued at the  average of the  closing  bid and ask  prices.  If any  securities
listed on a U.S.  securities  exchange are not traded on a valuation  date, they
will be valued at the last quoted bid price.  If securities  listed on a foreign
securities  exchange are not traded on a valuation  date, they will be valued at
the most recent  quoted  trade  price.  Securities  which are traded in the U.S.
over-the-counter  markets  are valued at the last  quoted bid price.  Securities
which are traded in the foreign  over-the-counter markets are valued at the last
sales price, except that such securities traded in the United Kingdom are valued
at the average of the closing bid and ask prices. Shares of investment companies
held by the Portfolio will be valued at their  respective net asset values.  Any
securities,  including restricted  securities,  for which current quotations are
not readily  available  are valued at fair value as  determined in good faith by
the  Investment  Adviser  under  the  supervision  of  the  Board  of  Trustees.
Short-term investments are valued at amortized cost which the Investment Adviser
has  determined,  pursuant to Board  authorization,  approximates  market value.
Securities may be valued on the basis of prices provided by independent  pricing
services  when such prices are believed to reflect the fair market value of such
securities.

Co-Administrators and Distributor

     Northern and FDISG, 4400 Computer Drive, Westborough,  Massachusetts 01581,
act as co-administrators  for the Portfolio under a Co-Administration  Agreement
with the Trust.  Subject to the  general  supervision  of the  Trust's  Board of
Trustees,  Northern and FDISG (the  "Co-Administrators")  provide supervision of
all  aspects of the  Trust's  non-investment  advisory  operations  and  perform
various corporate secretarial, treasury and blue sky services, including but not
limited to: (a) maintaining office facilities and furnishing  corporate officers
for the Trust; (b) furnishing data processing services,  clerical services,  and
executive  and  administrative  services  and  standard  stationery  and  office
supplies;  (c) performing all functions  ordinarily performed by the office of a
corporate  treasurer,  and  furnishing  the services and  facilities  ordinarily
incident thereto,  such as expense accrual monitoring and payment of the Trust's
bills, preparing monthly reconciliation of the Trust's expense records, updating
projections of annual expenses,  preparing  materials for review by the Board of
Trustees and compliance  testing;  (d) preparing and  submitting  reports to the
Trust's   shareholders  and  the  SEC;  (e)  preparing  and  printing  financial
statements;  (f) preparing monthly Portfolio profile reports;  (g) preparing and
filing the Trust's  federal and state tax returns  (other than those required to
be filed by the Trust's custodian and transfer agent) and providing  shareholder
tax  information  to the Trust's  transfer  agent;  (h)  assisting  in marketing
strategy   and  product   development;   (i)   performing   oversight/management
responsibilities,  such as the  supervision  and  coordination of certain of the
Trust's service  providers;  (j) effecting and maintaining,  as the case may be,
the  registration  of shares of the Trust for sale under the securities  laws of
various  jurisdictions;  (k) assisting in maintaining corporate records and good
standing  status of the Trust in its state of  organization;  and (l) monitoring
the Trust's  arrangements  with respect to services provided by Servicing Agents
to  their  customers  who are the  beneficial  owners  of  shares,  pursuant  to
servicing agreements between the Trust and such Servicing Agents.

     Subject to the  limitations  described  below,  as  compensation  for their
administrative   services  and  the   assumption   of  related   expenses,   the
Co-Administrators  are entitled to a fee from the Portfolio,  computed daily and
payable  monthly,  at an annual rate of .10% of the average  daily net assets of
the  Portfolio.  The  Co-Administrators  will  reimburse  each Portfolio for its
expenses (including  administration fees payable to the  Co-Administrators,  but
excluding advisory fees, transfer agency fees,  servicing fees and extraordinary
expenses) which exceed on an annualized  basis .10% of the  Portfolio's  average
daily net assets.

     Unless sooner terminated, the Co-Administration  Agreement will continue in
effect until April 30, 2001, and  thereafter for successive  one-year terms with
respect to the Portfolio,  provided that the Agreement is approved  annually (1)
by the Board of  Trustees  or (2) by the vote of a majority  of the  outstanding
shares of the Portfolio (as defined below under "Other  Information"),  provided
that in either  event the  continuance  is also  approved  by a majority  of the
Trustees who are not parties to the Agreement and who are not interested persons
(as defined in the 1940 Act) of any party  thereto,  by vote cast in person at a
meeting called for the purpose of voting on such approval. The Co-Administration
Agreement is terminable at any time after April 30, 2001, without penalty by the
Trust  on at  least  60  days  written  notice  to the  Co-Administrators.  Each
Co-Administrator may terminate the  Co-Administration  Agreement with respect to
itself at any time  after  April 30,  2001  without  penalty on at least 60 days
written notice to the Trust and the other Co-Administrator.

     The Trust may terminate the Co-Administration  Agreement prior to April 30,
2001, in the event that the Trust or its shareholders incur damages in excess of
$100,000 as a result of the willful misfeasance,  bad faith or negligence of the
Co-Administrators,   or  the  reckless  disregard  of  their  duties  under  the
Agreement. The Trust may also terminate the Co-Administration Agreement prior to
April 30, 2001, in the event that the Co-Administrators  fail to meet one of the
performance standards set forth in the Agreement.

     The Trust has entered into a Distribution  Agreement with FDDI, under which
FDDI, as agent,  sells shares of the Portfolio on a continuous  basis. FDDI pays
the cost of  printing  and  distributing  prospectuses  to  persons  who are not
shareholders  of the Trust  and of sales  presentations,  advertising  and other
distribution  efforts.  No compensation is payable by the Trust to FDDI for such
distribution services.

     The  Co-Administration  Agreement provides that the  Co-Administrators  may
render similar services to others so long as their services under such Agreement
are not impaired thereby. The Co-Administration Agreement also provides that the
Trust will  indemnify  each  Co-Administrator  against all claims  except  those
resulting  from  the  willful  misfeasance,  bad  faith  or  negligence  of such
Co-Administrator,  or the  Co-Administrator's  breach  of  confidentiality.  The
Distribution  Agreement  provides  that the Trust will  indemnify  FDDI  against
certain liabilities  relating to untrue statements or omissions of material fact
except those  resulting from the reliance on information  furnished to the Trust
by  FDDI,  or  those  resulting  from  the  willful  misfeasance,  bad  faith or
negligence of FDDI, or FDDI's breach of confidentiality.  FDDI is a wholly-owned
subsidiary  of  FDISG,  which  is  a  wholly-owned   subsidiary  of  First  Data
Corporation.

Shareholder Servicing Plan

     As stated in the Portfolio's  Prospectus,  Servicing  Agents may enter into
servicing agreements with the Trust under which they provide (or arrange to have
provided)   support   services  to  their   Customers  or  other  investors  who
beneficially own such shares in consideration of the Portfolio's  payment of not
more than .15% and .25% (on an annualized  basis) of the average daily net asset
value of the  Class C and D  Shares,  respectively,  beneficially  owned by such
Customers or investors.

     Services  provided by or arranged to be provided by Servicing  Agents under
their  servicing  agreements  may  include:  (1)  establishing  and  maintaining
separate  account  records  of  Customers  or  other  investors;  (2)  providing
Customers or other  investors with a service that invests their assets in shares
of certain  classes  pursuant to specific or  pre-authorized  instructions,  and
assistance  with  new  account  applications;  (3)  aggregating  and  processing
purchase and redemption requests for shares of certain classes from Customers or
other investors,  and placing  purchase and redemption  orders with the Transfer
Agent;  (4) issuing  confirmations to Customers or other investors in accordance
with  applicable  law;  (5)  arranging  for the  timely  transmission  of  funds
representing  the net purchase  price or  redemption  proceeds;  (6)  processing
dividend  payments on behalf of  Customers  or other  investors;  (7)  providing
information periodically to Customers or other investors showing their positions
in shares;  (8)  responding to Customer or other investor  inquiries  (including
requests for prospectuses), and complaints relating to the services performed by
the  Servicing  Agents;  (9) acting as liaison with respect to all inquiries and
complaints  from Customers and other investors  relating to errors  committed by
the Trust or its  agents,  and  other  matters  pertaining  to the  Trust;  (10)
providing or arranging for another person to provide  subaccounting with respect
to shares of certain classes beneficially owned by Customers or other investors;
(11) if required by law,  forwarding  shareholder  communications from the Trust
(such  as  proxy  statements  and  proxies,   shareholder  reports,  annual  and
semi-annual financial statements and dividend,  distribution and tax notices) to
Customers and other investors;  (12) providing such office space, facilities and
personnel  as may be  required to perform  their  services  under the  servicing
agreements;  (13) maintaining  appropriate  management reporting and statistical
information;  (14) paying expenses related to the preparation of educational and
other  explanatory  materials in  connection  with the  development  of investor
services; (15) developing and monitoring investment programs; and (16) providing
such other similar  services as the Trust may  reasonably  request to the extent
the Servicing Agents are permitted to do so under applicable statutes, rules and
regulations.

     The Trust's agreements with Servicing Agents are governed by a Plan (called
the  "Shareholder  Servicing  Plan"),  which  has been  adopted  by the Board of
Trustees. Pursuant to the Shareholder Servicing Plan, the Board of Trustees will
review,  at least quarterly,  a written report of the amounts expended under the
Trust's  agreements  with  Servicing  Agents  and the  purposes  for  which  the
expenditures were made. In addition, the arrangements with Servicing Agents must
be  approved  annually  by a  majority  of the Board of  Trustees,  including  a
majority of the  Trustees  who are not  "interested  persons"  of the Trust,  as
defined in the 1940 Act,  and have no direct or indirect  financial  interest in
such arrangements.

     The Board of Trustees has approved the  arrangements  with Servicing Agents
based on information provided by the Trust's service contractors that there is a
reasonable  likelihood that the arrangements  will benefit the Portfolio and its
shareholders by affording the Portfolio  greater  flexibility in connection with
the  servicing  of the  accounts  of the  beneficial  owners of its shares in an
efficient manner.

Counsel and Auditors

     Drinker  Biddle & Reath LLP,  with  offices at One Logan  Square,  18th and
Cherry Streets,  Philadelphia,  Pennsylvania 19103-6996, serve as counsel to the
Trust.

     Ernst & Young LLP,  independent  auditors,  233 S. Wacker  Drive,  Chicago,
Illinois  60606,  have been  selected as  auditors of the Trust.  In addition to
audit  services,  Ernst & Young LLP reviews  the  Trust's  Federal and state tax
returns,  and provides  consultation  and  assistance  on  accounting,  internal
control and related matters.

In-Kind Purchases and Redemptions

     Payment for shares of the Portfolio may, in the discretion of Northern,  be
made  in the  form  of  securities  that  are  permissible  investments  for the
Portfolio as described in the  Prospectus.  For further  information  about this
form of payment,  contact  Northern.  In connection  with an in-kind  securities
payment, the Portfolio will require,  among other things, that the securities be
valued on the day of purchase in accordance with the pricing methods used by the
Portfolio and that the Portfolio  receive  satisfactory  assurances that it will
have  good and  marketable  title to the  securities  received  by it;  that the
securities  be in proper form for transfer to the  Portfolio;  and that adequate
information be provided  concerning the basis and other tax matters  relating to
the securities.

     Although the  Portfolio  generally  will redeem shares in cash, it reserves
the right to pay redemptions by a distribution in-kind of securities (instead of
cash) from the Portfolio.  The securities  distributed  in-kind would be readily
marketable  and would be valued for this purpose using the same method  employed
in  calculating  the  Portfolio's  net asset value per share.  If a  shareholder
receives  redemption  proceeds in-kind,  the shareholder  should expect to incur
transaction  costs  upon  the  disposition  of the  securities  received  in the
redemption.

                             PERFORMANCE INFORMATION

     The  performance  of a class of shares of the  Portfolio may be compared to
those of other  mutual  funds with similar  investment  objectives  and to bond,
stock and other relevant indices or to rankings prepared by independent services
or other  financial or industry  publications  that monitor the  performance  of
mutual funds. For example,  the performance of a class of shares may be compared
to data prepared by Lipper Analytical Services, Inc. or other independent mutual
fund reporting services. In addition, the performance of a class may be compared
to the Russell 2000 Index or the Dow Jones Industrial Average.  Performance data
as  reported  in  national  financial   publications  such  as  Money  Magazine,
Morningstar,  Forbes,  Barron's, The Wall Street Journal and The New York Times,
or in publications of a local or regional nature,  may also be used in comparing
the performance of a class of shares of the Portfolio.

     The  Portfolio  calculates  its total  return on an "average  annual  total
return"  basis for various  periods.  Average  annual total return  reflects the
average annual percentage change in value of an investment in the Portfolio over
the measuring  period.  Total return for the Portfolio may also be calculated on
an "aggregate  total return" basis for various  periods.  Aggregate total return
reflects the total percentage  change in value over the measuring  period.  Both
methods of calculating  total return reflect  changes in the price of the shares
and  assume  that any  dividends  and  capital  gain  distributions  made by the
Portfolio during the period are reinvested in the shares of the Portfolio.  When
considering average total return figures for periods longer than one year, it is
important to note that the annual total return of the Portfolio for any one year
in the  period  might  have been more or less than the  average  for the  entire
period. The Portfolio may also advertise from time to time the total return on a
year-by-year or other basis for various specific periods by means of quotations,
charts, graphs or schedules.

     The Portfolio  calculates its "average  annual total return" for a class of
shares by  determining  the  average  annual  compounded  rate of return  during
specified  periods  that  equates  the  initial  amount  invested  to the ending
redeemable value of such investment according to the following formula:

                               T = (ERV/P) 1/n -1


           Where:       T =       average annual total return;

                        ERV =     ending redeemable value of a hypothetical
                                  $1,000 payment made at the beginning of the
                                  1, 5 or 10 year (or other) periods at the end
                                  of the applicable period (or a fractional
                                  portion thereof);

                        P =       hypothetical initial payment of $1,000; and

                        n =       period covered by the computation, expressed
                                  in years.

     The Portfolio calculates its "aggregate total return" for a class of shares
by determining the aggregate compounded rates of return during specified periods
that likewise equate the initial amount invested to the ending  redeemable value
of such  investment.  The formula for  calculating  aggregate total return is as
follows:

                     Aggregate Total Return = T = (ERV/P) -1

     The calculations of "aggregate total return" will be made assuming that (1)
all dividends and capital gain  distributions are reinvested on the reinvestment
dates at the price  per  share  existing  on the  reinvestment  date and (2) all
recurring  fees charged to all  shareholder  accounts are  included.  The ending
redeemable  value  (variable  "ERV" in the  formula) is  determined  by assuming
complete  redemption  of the  hypothetical  investment  after  deduction  of all
nonrecurring charges at the end of the measuring period.

     The yield of a class of shares of the  Portfolio  is computed  based on the
net income of such class  during a 30-day (or one month)  period  (which  period
will be identified in connection  with the particular  yield  quotations).  More
specifically,  the  Portfolio's  yield  for a class of  shares  is  computed  by
dividing  the per share net  income of the class  during a 30-day (or one month)
period  by the net  asset  value  per  share on the last day of the  period  and
annualizing the result on a semi-annual basis.

     The Portfolio's 30-day (or one month) standard yield is calculated for each
class in accordance with the method prescribed by the SEC for mutual funds:


                            Yield = 2[(a-b/cd+1)6 - 1]

Where:                     a =       dividends and interest earned during the
                                           period;

                           b =       expenses accrued for the period (net of
                                           reimbursements);

                           c =       average daily number of shares outstanding
                                           during the period entitled to receive
                                           dividends; and

                           d =     net asset value per share on the last day of
                                           the period.

     Because of the different  servicing  fees and transfer  agency fees payable
with respect to Class A, C and D Shares in the Portfolio, performance quotations
for shares of Class C and D of the Portfolio  will be lower than the  quotations
for  Class A  Shares  of the  Portfolio,  which  will  not  bear  any  fees  for
shareholder support services and will bear minimal transfer agency fees.

     The  performance  of each  class of  shares  of the  Portfolio  is based on
historical  earnings,  will  fluctuate  and is not  intended to indicate  future
performance.  The  investment  return and principal  value of an investment in a
class will  fluctuate  so that when  redeemed,  shares may be worth more or less
than their original cost.  Performance  information  may not provide a basis for
comparison with bank deposits and other  investments which provide a fixed yield
for a stated  period of time.  Total  return data should also be  considered  in
light  of the  risks  associated  with  the  Portfolio's  composition,  quality,
maturity,  operating  expenses  and  market  conditions.  Any  fees  charged  by
Institutions  directly to their Customer accounts in connection with investments
in  the  Portfolio  will  not  be  included  in   calculations   of  performance
information.

TAXES

     The following  summarizes certain  additional tax considerations  generally
affecting  the  Portfolio  and its  shareholders  that are not  described in the
Portfolio's 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 the applicable Prospectus is not intended as a substitute for careful tax
planning.  Potential  investors  should consult their tax advisers with specific
reference to their own tax situations.

GENERAL

     The Portfolio will elect to be taxed  separately as a regulated  investment
company (a "RIC"). To qualify as a RIC, the Portfolio  generally must distribute
an amount equal to at least 90% of its  investment  company  taxable income (net
investment  income  and the  excess  of net  short-term  capital  gain  over net
long-term capital loss), if any, for each year (the "Distribution  Requirement")
and satisfy certain other  requirements.  The Portfolio must derive at least 90%
of its gross income from dividends,  interest,  certain payments with respect to
securities  loans  and  gains  from the sale or  other  disposition  of stock or
securities or foreign  currencies,  or from other income derived with respect to
its business of investing in such stock, securities or currencies.  Also, at the
close of each  quarter of the taxable  year,  it is generally  required  that at
least 50% of the value of the  Portfolio's  assets must consist of cash and cash
items, U.S.  Government  securities,  securities of other RICs and securities of
other  issuers (as to which the  Portfolio  has not invested more than 5% of the
value of its  total  assets in  securities  of such  issuer  and as to which the
Portfolio does not hold more than 10% of the  outstanding  voting  securities of
such issuer),  and no more than 25% of the value of the Portfolio's total assets
may be invested in the securities of any one issuer (other than U.S.  Government
securities and securities of other regulated investment companies), or in two or
more issuers which the  Portfolio  controls and which are engaged in the same or
similar  trades or  businesses.  The Portfolio  intends to comply with these RIC
requirements.

     If for any taxable year the Portfolio  were not to qualify as a RIC, all of
its taxable  income would be subject to tax at regular  corporate  rates without
any  deduction  for   distributions   to   shareholders.   In  such  event,  all
distributions  by the  Portfolio  would be taxable to  shareholders  as ordinary
income to the extent of the  Portfolio's  current and  accumulated  earnings and
profits, and would be eligible for the dividends-received  deduction in the case
of corporate shareholders .

     The Internal  Revenue Code  imposes a  nondeductible  4% excise tax on RICs
that fail  currently to distribute an amount equal to specified  percentages  of
their  ordinary  taxable  income and capital gain net income  (excess of capital
gains  over  capital   losses).   The  Portfolio   intends  to  make  sufficient
distributions or deemed distributions of its ordinary taxable income and capital
gain net income each calendar  year to avoid  liability for this excise tax. The
Portfolio also intends to make sufficient  distributions or deemed distributions
each year to avoid liability for corporate  income tax. If the Portfolio were to
fail to make sufficient  distributions,  it could be liable for corporate income
tax and for excise tax.

     The Trust will be  required in certain  cases to withhold  and remit to the
United  States  Treasury 31% of taxable  dividends or 31% of gross sale proceeds
paid  to  any   shareholder  (i)  who  has  provided  either  an  incorrect  tax
identification  number  or no  number  at all,  (ii) who is  subject  to  backup
withholding  by the  Internal  Revenue  Service for prior  failure to report the
receipt of taxable interest or dividend income properly, or (iii) who has failed
to certify to the  Trust,  when  required  to do so,  that he is not  subject to
backup withholding or that he is an "exempt recipient."

Foreign Investors

     Foreign shareholders generally will be subject to U.S. withholding tax at a
rate of 30% (or a lower treaty rate,  if  applicable)  on  distributions  by the
Portfolio of net investment  income,  other ordinary income,  and the excess, if
any, of net  short-term  capital  gain over net  long-term  capital loss for the
year,  regardless of the extent,  if any, to which the income or gain is derived
from  non-U.S.   investments  of  the  Portfolio.   For  this  purpose,  foreign
shareholders include individuals other than U.S. citizens, residents and certain
nonresident aliens, and foreign corporations,  partnerships, trusts and estates.
A  foreign  shareholder  generally  will  not  be  subject  to  U.S.  income  or
withholding  tax in respect of proceeds from or gain on the redemption of shares
or in respect of capital gain dividends (i.e.,  dividends  attributable to long-
term  capital  gains of the  Portfolio),  provided  such  shareholder  submits a
statement,  signed under penalties of perjury,  attesting to such  shareholder's
exempt status. Different tax consequences apply to a foreign shareholder engaged
in a U.S.  trade or  business  or present in the U.S.  for 183 days or more in a
year. Foreign  shareholders should consult their tax advisers regarding the U.S.
and foreign tax consequences of investing in the Portfolio.

Conclusion

     The foregoing discussion is based on Federal tax laws and regulations which
are  in  effect  on the  date  of  this  Additional  Statement.  Such  laws  and
regulations may be changed by legislative or  administrative  action. 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 the  Prospectus  is not
intended as a substitute for careful tax planning.  Shareholders  are advised to
consult their tax advisers with specific  reference to their own tax  situation,
including the application of state and local taxes.

     Although  the  Portfolio  expects to qualify as a RIC and to be relieved of
all or  substantially  all  Federal  taxes,  depending  upon the  extent  of its
activities  in states and  localities  in which its offices are  maintained,  in
which its  agents  or  independent  contractors  are  located  or in which it is
otherwise deemed to be conducting business,  the Portfolio may be subject to the
tax laws of such states or localities.

DESCRIPTION OF SHARES

     The Trust  Agreement  permits  the  Trust's  Board of  Trustees to issue an
unlimited number of full and fractional shares of beneficial  interest of one or
more  separate  series   representing   interests  in  one  or  more  investment
portfolios.  The Trustees may hereafter create series in addition to the Trust's
nineteen  existing  series,  which represent  interests in the Trust's  nineteen
respective portfolios. The Trust Agreement also permits the Board of Trustees to
classify  or  reclassify  any  unissued  shares  into  classes  within a series.
Pursuant to such  authority,  the Trustees  have  authorized  the issuance of an
unlimited  number of shares of beneficial  interest in three separate classes of
shares in the Portfolio: Class A, C and D Shares.

     Under the terms of the Trust  Agreement,  each  share of the  Portfolio  is
without par value,  represents an equal proportionate  interest in the Portfolio
with each other share of its class in the same Portfolio and is entitled to such
dividends and  distributions out of the income belonging to the Portfolio as are
declared by the Trustees. Upon any liquidation of the Portfolio, shareholders of
each class of the  Portfolio  are  entitled  to share pro rata in the net assets
belonging  to that  class  available  for  distribution.  Shares do not have any
preemptive or  conversion  rights.  The right of  redemption is described  under
"About Your Account -- Selling Shares" in the Prospectus. In addition,  pursuant
to the terms of the 1940 Act, the right of a  shareholder  to redeem  shares and
the date of payment by the  Portfolio  may be suspended for more than seven days
(a) for any period  during  which the New York Stock  Exchange is closed,  other
than the customary weekends or holidays, or trading in the markets the Portfolio
normally  utilizes is closed or is  restricted  as  determined  by the SEC,  (b)
during any  emergency,  as determined by the SEC, as a result of which it is not
reasonably  practicable for the Portfolio to dispose of instruments  owned by it
or fairly to determine the value of its net assets, or (c) for such other period
as the SEC may by order permit for the  protection  of the  shareholders  of the
Portfolio.  The  Trust may also  suspend  or  postpone  the  recordation  of the
transfer of its shares upon the  occurrence of any of the foregoing  conditions.
In addition,  shares of the Portfolio are redeemable at the unilateral option of
the Trust if the Trustees  determine in their sole discretion that failure to so
redeem  may  have  material  adverse  consequences  to the  shareholders  of the
Portfolio. Shares when issued as described in the Prospectus are validly issued,
fully  paid and  nonassessable,  except as stated  below.  In the  interests  of
economy and convenience,  certificates  representing shares of the Portfolio are
not issued.

     The  proceeds  received  by the  Portfolio  for  each  issue or sale of its
shares, and all net investment income, realized and unrealized gain and proceeds
thereof, subject only to the rights of creditors, will be specifically allocated
to and constitute the underlying assets of the Portfolio.  The underlying assets
of the Portfolio will be segregated on the books of account, and will be charged
with the liabilities  and with a share of the general  liabilities of the Trust.
Expenses with respect to the  Portfolio are normally  allocated in proportion to
the net asset value of the Portfolio except where allocations of direct expenses
can otherwise be fairly made.

     Rule 18f-2  under the 1940 Act  provides  that any matter  required  by the
provisions  of the  1940  Act or  applicable  state  law,  or  otherwise,  to be
submitted to the holders of the outstanding  voting  securities of an investment
company  such as the Trust  shall not be deemed to have been  effectively  acted
upon unless approved by the holders of a majority of the  outstanding  shares of
each investment  portfolio affected by such matter.  Rule 18f-2 further provides
that an investment  portfolio  shall be deemed to be affected by a matter unless
the  interests  of each  investment  portfolio  in the matter are  substantially
identical  or the  matter  does  not  affect  any  interest  of  the  investment
portfolio.  Under the Rule, the approval of an investment  advisory agreement or
any change in a fundamental  investment  policy would be effectively  acted upon
with respect to an  investment  portfolio  only if approved by a majority of the
outstanding shares of such investment portfolio. However, the Rule also provides
that  the  ratification  of the  appointment  of  independent  accountants,  the
approval of principal  underwriting  contracts  and the election of Trustees are
exempt  from  the  separate  voting  requirements  stated  above.  In  addition,
shareholders  of each of the classes in a particular  investment  portfolio have
equal  voting  rights  except  that  only  shares  of a  particular  class of an
investment  portfolio will be entitled to vote on matters submitted to a vote of
shareholders  (if any) relating to shareholder  servicing  expenses and transfer
agency fees that are payable by that class.

     The Trust is not required to hold annual meetings of shareholders  and does
not intend to hold such meetings. In the event that a meeting of shareholders is
held,  each share of the Trust will be entitled,  as  determined by the Trustees
without the vote or consent of  shareholders,  either to one vote for each share
or to one vote for each dollar of net asset value  represented by such shares on
all matters presented to shareholders,  including the election of Trustees (this
method of voting being referred to as "dollar-based  voting").  However,  to the
extent required by the 1940 Act or otherwise determined by the Trustees,  series
and classes of the Trust will vote separately  from each other.  Shareholders of
the Trust do not have cumulative  voting rights in the election of Trustees and,
accordingly,  the holders of more than 50% of the aggregate  voting power of the
Trust  may  elect  all of the  Trustees,  irrespective  of the vote of the other
shareholders.  Meetings  of  shareholders  of the Trust,  or any series or class
thereof,  may be called by the  Trustees,  certain  officers or upon the written
request  of  holders  of 10% or  more  of the  shares  entitled  to vote at such
meeting.  To the extent  required by law,  the Trust will assist in  shareholder
communications  in  connection  with  a  meeting  called  by  shareholders.  The
shareholders  of the Trust  will have  voting  rights  only with  respect to the
limited  number of  matters  specified  in the Trust  Agreement  and such  other
matters as the Trustees may determine or may be required by law.

     The Trust Agreement  authorizes the Trustees,  without shareholder approval
(except  as stated in the next  paragraph),  to cause the  Trust,  or any series
thereof,  to merge or consolidate  with any corporation,  association,  trust or
other  organization or sell or exchange all or substantially all of the property
belonging  to the Trust,  or any series  thereof.  In  addition,  the  Trustees,
without shareholder approval, may adopt a "master-feeder" structure by investing
substantially  all of the assets of a series of the Trust in the  securities  of
another open-end investment company or pooled portfolio.

     The Trust  Agreement also  authorizes the Trustees,  in connection with the
merger,  consolidation,  termination or other reorganization of the Trust or any
series or class,  to  classify  the  shareholders  of any class into one or more
separate groups and to provide for the different treatment of shares held by the
different groups, provided that such merger, consolidation, termination or other
reorganization  is approved by a majority of the outstanding  voting  securities
(as  defined  in the  1940  Act) of  each  group  of  shareholders  that  are so
classified.

     The Trust  Agreement  permits  the  Trustees  to amend the Trust  Agreement
without a shareholder vote. However, shareholders of the Trust have the right to
vote on any  amendment  (i) that would  adversely  affect  the voting  rights of
shareholders; (ii) that is required by law to be approved by shareholders; (iii)
that would amend the voting provisions of the Trust Agreement;  or (iv) that the
Trustees determine to submit to shareholders.

     The Trust  Agreement  permits the termination of the Trust or of any series
or class of the  Trust  (i) by a  majority  of the  affected  shareholders  at a
meeting of shareholders of the Trust,  series or class; or (ii) by a majority of
the Trustees without  shareholder  approval if the Trustees  determine that such
action is in the best interest of the Trust or its shareholders. The factors and
events that the  Trustees  may take into  account in making  such  determination
include (i) the  inability  of the Trust or any series or class to maintain  its
assets at an appropriate size; (ii) changes in laws or regulations governing the
Trust, or any series or class thereof,  or affecting assets of the type in which
it  invests;  or (iii)  economic  developments  or trends  having a  significant
adverse impact on their business or operations.

     Under the Delaware  Business Trust Act (the "Delaware  Act"),  shareholders
are not  personally  liable for  obligations  of the  Trust.  The  Delaware  Act
entitles  shareholders  of the Trust to the same  limitation  of liability as is
available  to  shareholders  of private  for-profit  corporations.  However,  no
similar  statutory  or  other  authority  limiting  business  trust  shareholder
liability exists in many other states. As a result, to the extent that the Trust
or a shareholder is subject to the  jurisdiction of courts in such other states,
those  courts may not apply  Delaware  law and may subject the  shareholders  to
liability.  To offset this risk,  the Trust  Agreement  (i)  contains an express
disclaimer of  shareholder  liability for acts or  obligations  of the Trust and
requires that notice of such disclaimer be given in each  agreement,  obligation
and  instrument  entered  into or executed by the Trust or its Trustees and (ii)
provides for indemnification out of the property of the applicable series of the
Trust of any shareholder held personally liable for the obligations of the Trust
solely by reason of being or having  been a  shareholder  and not because of the
shareholder's  acts or omissions or for some other reason.  Thus,  the risk of a
shareholder  incurring  financial loss beyond his or her  investment  because of
shareholder  liability is limited to circumstances in which all of the following
factors  are  present:  (1) a court  refuses  to  apply  Delaware  law;  (2) the
liability  arises  under  tort law or,  if not,  no  contractual  limitation  of
liability is in effect;  and (3) the applicable series of the Trust is unable to
meet its obligations.

     The Trust  Agreement  provides  that the Trustees will not be liable to any
person  other  than the Trust or a  shareholder  and that a Trustee  will not be
liable  for  any act as a  Trustee.  However,  nothing  in the  Trust  Agreement
protects a Trustee  against any liability to which he or she would  otherwise be
subject  by reason of  willful  misfeasance,  bad  faith,  gross  negligence  or
reckless  disregard of the duties  involved in the conduct of his or her office.
The Trust  Agreement  provides for  indemnification  of  Trustees,  officers and
agents of the  Trust  unless  the  recipient  is  liable  by  reason of  willful
misfeasance,  bad faith,  gross  negligence or reckless  disregard of the duties
involved in the conduct of such person's office.

     The Trust Agreement  provides that each shareholder,  by virtue of becoming
such,  will be held to have  expressly  assented  and agreed to the terms of the
Trust Agreement and to have become a party thereto.

     In  addition  to the  requirements  of Delaware  law,  the Trust  Agreement
provides that a shareholder of the Trust may bring a derivative action on behalf
of the Trust only if the following conditions are met: (a) shareholders eligible
to bring such derivative  action under Delaware law who hold at least 10% of the
outstanding  shares of the Trust, or 10% of the outstanding shares of the series
or class to which such action relates, must join in the request for the Trustees
to commence  such  action;  and (b) the  Trustees  must be afforded a reasonable
amount of time to consider such shareholder request and to investigate the basis
of such claim. The Trust Agreement also provides that no person,  other than the
Trustees,  who is not a  shareholder  of a  particular  series or class shall be
entitled to bring any derivative  action,  suit or other proceeding on behalf of
or with respect to such series or class. The Trustees will be entitled to retain
counsel or other  advisers  in  considering  the merits of the  request  and may
require an undertaking by the shareholders  making such request to reimburse the
Trust  for the  expense  of any such  advisers  in the event  that the  Trustees
determine not to bring such action.

     The  Trustees  may appoint  separate  Trustees  with respect to one or more
series or classes of the Trust's shares (the "Series  Trustees").  To the extent
provided by the Trustees in the appointment of Series Trustees,  Series Trustees
(a) may,  but are not  required  to, serve as Trustees of the Trust or any other
series  or class of the  Trust;  (b) may  have,  to the  exclusion  of any other
Trustee of the Trust, all the powers and authorities of Trustees under the Trust
Agreement with respect to such series or class;  and/or (c) may have no power or
authority  with  respect  to any other  series or class.  The  Trustees  are not
currently considering the appointment of Series Trustees for the Trust.

     As  of  July  31,  1999,  substantially  all  of  the  Trust's  portfolios'
outstanding  shares  were held of  record by  Northern  for the  benefit  of its
customers and the customers of its affiliates and correspondent  banks that have
invested in the  portfolios.  As of the same date,  Northern  possessed  sole or
shared voting and/or  investment power for its customer accounts with respect to
less than [10%] of the  Trust's  outstanding  shares.  As of the same date,  the
Trust's Trustees and officers as a group owned  beneficially less than 1% of the
outstanding shares of each class of each portfolio.


                                OTHER INFORMATION

     The  Prospectus  and  this  Additional  Statement  do not  contain  all the
information included in the Registration  Statement filed with the SEC under the
Securities  Act of 1933 with  respect to the  securities  offered by the Trust's
Prospectus.  Certain  portions of the  Registration  Statement have been omitted
from the  Prospectus  and this  Additional  Statement  pursuant to the rules and
regulations of the SEC. The Registration  Statement including the exhibits filed
therewith may be examined at the office of the SEC in Washington, D.C.

     The Portfolio is responsible for the payment of its expenses. Such expenses
include, without limitation, the fees and expenses payable to Northern and First
Data, brokerage fees and commissions, fees for the registration or qualification
of Portfolio  shares under  Federal or state  securities  laws,  expenses of the
organization of the Portfolio,  taxes,  interest,  costs of liability insurance,
fidelity bonds,  indemnification or contribution,  any costs, expenses or losses
arising out of any liability  of, or claim for damages or other relief  asserted
against,  the Trust for violation of any law,  legal,  tax and auditing fees and
expenses,  servicing  fees,  expenses of preparing  and  printing  prospectuses,
statements of additional information,  proxy materials,  reports and notices and
the  printing  and  distributing  of the same to the  Trust's  shareholders  and
regulatory authorities,  compensation and expenses of its Trustees, expenses for
industry  organizations such as the Investment Company Institute,  miscellaneous
expenses and extraordinary expenses incurred by the Trust.

     The term  "majority of the  outstanding  shares" of either the Trust or the
Portfolio  means,  with  respect  to  the  approval  of an  investment  advisory
agreement or a change in a fundamental investment policy, the vote of the lesser
of (i) 67% or more of the  shares of the  Trust or the  Portfolio  present  at a
meeting,  if the holders of more than 50% of the outstanding shares of the Trust
or the Portfolio are present or represented  by proxy,  or (ii) more than 50% of
the outstanding shares of the Trust or the Portfolio.

     Statements  contained in the Prospectus or in this Additional  Statement as
to the  contents  of  any  contract  or  other  documents  referred  to are  not
necessarily complete, and in each instance reference is made to the copy of such
contract or other document filed as an exhibit to the Registration  Statement of
which  the  Prospectus  and this  Additional  Statement  form a part,  each such
statement being qualified in all respects by such reference.


                                   APPENDIX A

COMMERCIAL PAPER RATINGS

     A Standard & Poor's ("S&P") commercial paper rating is a current assessment
of the  likelihood of timely  payment of debt having an original  maturity of no
more than 365 days.  The  following  summarizes  the rating  categories  used by
Standard and Poor's for commercial paper:

     "A-1" - Obligations are rated in the highest  category  indicating that the
     obligor's  capacity to meet its financial  commitment on the  obligation is
     strong.  Within this category,  certain  obligations  are designated with a
     plus sign (+).  This  indicates  that the  obligor's  capacity  to meet its
     financial commitment on these obligations is extremely strong.

     "A-2" - Obligations are somewhat more susceptible to the adverse effects of
     changes in circumstances and economic conditions than obligations in higher
     rating  categories.  However,  the obligor's capacity to meet its financial
     commitment on the obligation is satisfactory.

     "A-3"  -  Obligations  exhibit  adequate  protection  parameters.  However,
     adverse economic  conditions or changing  circumstances  are more likely to
     lead to a weakened capacity of the obligor to meet its financial commitment
     on the obligation.

     "B"  -  Obligations   are  regarded  as  having   significant   speculative
     characteristics.  The  obligor  currently  has the  capacity  to  meet  its
     financial  commitment on the  obligation;  however,  it faces major ongoing
     uncertainties which could lead to the obligor's inadequate capacity to meet
     its financial commitment on the obligation.

     "C" - Obligations are currently  vulnerable to nonpayment and are dependent
     upon favorable business, financial, and economic conditions for the obligor
     to meet its financial commitment on the obligation.

     "D" - Obligations are in payment  default.  The "D" rating category is used
     when  payments  on an  obligation  are not made on the date due even if the
     applicable  grace  period has not expired,  unless S&P  believes  that such
     payments will be made during such grace period. The "D" rating will be used
     upon the filing of a bankruptcy  petition or the taking of a similar action
     if payments on an obligation are jeopardized.

     Moody's  commercial paper ratings are opinions of the ability of issuers to
repay  punctually  senior debt  obligations  not having an original  maturity in
excess of one year, unless explicitly noted. The following summarizes the rating
categories used by Moody's for commercial paper:

     "Prime-1" - Issuers (or supporting  institutions)  have a superior  ability
     for repayment of senior  short-term  debt  obligations.  Prime-1  repayment
     ability will often be evidenced by many of the  following  characteristics:
     leading  market  positions in  well-established  industries;  high rates of
     return  on  funds  employed;  conservative  capitalization  structure  with
     moderate  reliance on debt and ample  asset  protection;  broad  margins in
     earnings  coverage  of  fixed  financial  charges  and high  internal  cash
     generation; and well-established access to a range of financial markets and
     assured sources of alternate liquidity.

     "Prime-2" - Issuers (or supporting  institutions) have a strong ability for
     repayment of senior  short-term  debt  obligations.  This will  normally be
     evidenced  by many  of the  characteristics  cited  above  but to a  lesser
     degree.  Earnings  trends and coverage  ratios,  while  sound,  may be more
     subject  to   variation.   Capitalization   characteristics,   while  still
     appropriate,  may be more affected by external conditions.  Ample alternate
     liquidity is maintained.

     "Prime-3" - Issuers (or supporting institutions) have an acceptable ability
     for repayment of senior short-term debt obligations. The effect of industry
     characteristics and market compositions may be more pronounced. Variability
     in earnings  and  profitability  may result in changes in the level of debt
     protection measurements and may require relatively high financial leverage.
     Adequate alternate liquidity is maintained.

     "Not  Prime"  -  Issuers  do  not  fall  within  any of  the  Prime  rating
     categories.

     The  three  rating  categories  of  Duff  &  Phelps  for  investment  grade
commercial  paper and short-term  debt are "D-1," "D-2" and "D-3." Duff & Phelps
employs three designations,  "D-1+," "D-1" and "D-1-," within the highest rating
category.  The following  summarizes the rating categories used by Duff & Phelps
for commercial paper:

     "D-1+" - Debt possesses the highest certainty of timely payment. Short-term
     liquidity,   including   internal   operating   factors  and/or  access  to
     alternative  sources  of funds,  is  outstanding,  and safety is just below
     risk-free U.S. Treasury short-term obligations.

     "D-1" - Debt  possesses very high  certainty of timely  payment.  Liquidity
     factors are excellent and supported by good fundamental protection factors.
     Risk factors are minor.

     "D-1-" - Debt possesses high certainty of timely payment. Liquidity factors
     are strong and  supported  by good  fundamental  protection  factors.  Risk
     factors are very small.

     "D-2" - Debt possesses good certainty of timely payment.  Liquidity factors
     and company  fundamentals  are sound.  Although  ongoing  funding needs may
     enlarge total  financing  requirements,  access to capital markets is good.
     Risk factors are small.

     "D-3" - Debt possesses  satisfactory liquidity and other protection factors
     qualify issues as to investment  grade. Risk factors are larger and subject
     to more variation. Nevertheless, timely payment is expected.

     "D-4" - Debt possesses speculative investment characteristics. Liquidity is
     not  sufficient to insure  against  disruption  in debt service.  Operating
     factors and market access may be subject to a high degree of variation.

     "D-5" - Issuer  has  failed to meet  scheduled  principal  and/or  interest
     payments.

     Fitch IBCA  short-term  ratings  apply to debt  obligations  that have time
horizons of less than 12 months for most  obligations,  or up to three years for
U.S. public finance securities.  The following  summarizes the rating categories
used by Fitch IBCA for short-term obligations:

     "F1" - Securities  possess the highest  credit  quality.  This  designation
     indicates   the  strongest   capacity  for  timely   payment  of  financial
     commitments  and may have an added "+" to denote any  exceptionally  strong
     credit feature.

     "F2" - Securities possess good credit quality. This designation indicates a
     satisfactory capacity for timely payment of financial commitments,  but the
     margin of safety is not as great as in the case of the higher ratings.

     "F3" - Securities possess fair credit quality.  This designation  indicates
     that the capacity for timely payment of financial  commitments is adequate;
     however,   near-term  adverse  changes  could  result  in  a  reduction  to
     non-investment grade.

     "B" - Securities  possess  speculative  credit  quality.  This  designation
     indicates  minimal  capacity for timely  payment of financial  commitments,
     plus  vulnerability to near-term  adverse changes in financial and economic
     conditions.

     "C" - Securities possess high default risk. This designation indicates that
     default is a real  possibility and that the capacity for meeting  financial
     commitments  is solely  reliant  upon a sustained,  favorable  business and
     economic environment.

     "D" - Securities are in actual or imminent payment default.

     Thomson BankWatch  short-term  ratings assess the likelihood of an untimely
payment of principal and interest of debt instruments  with original  maturities
of one year or less.  The  following  summarizes  the  ratings  used by  Thomson
BankWatch:

     "TBW-1" - This designation  represents Thomson BankWatch's highest category
     and indicates a very high  likelihood  that  principal and interest will be
     paid on a timely basis.

     "TBW-2" - This designation  represents Thomson  BankWatch's  second-highest
     category and  indicates  that while the degree of safety  regarding  timely
     repayment of  principal  and  interest is strong,  the  relative  degree of
     safety is not as high as for issues rated "TBW-1."

     "TBW-3"  -  This  designation   represents   Thomson   BankWatch's   lowest
     investment-grade  category and indicates  that while the obligation is more
     susceptible to adverse developments (both internal and external) than those
     with higher  ratings,  the capacity to service  principal and interest in a
     timely fashion is considered adequate.

     "TBW-4" - This designation  represents  Thomson  BankWatch's  lowest rating
     category and indicates  that the  obligation is regarded as  non-investment
     grade and therefore speculative.

CORPORATE AND MUNICIPAL LONG-TERM DEBT RATINGS

     The  following  summarizes  the  ratings  used by  Standard  &  Poor's  for
corporate and municipal debt:

     "AAA" - An  obligation  rated  "AAA" has the  highest  rating  assigned  by
     Standard & Poor's. The obligor's capacity to meet its financial  commitment
     on the obligation is extremely strong.

     "AA" - An obligation rated "AA" differs from the highest rated  obligations
     only  in  small  degree.  The  obligor's  capacity  to meet  its  financial
     commitment on the obligation is very strong.

     "A" - An obligation  rated "A" is somewhat more  susceptible to the adverse
     effects  of  changes  in   circumstances   and  economic   conditions  than
     obligations in higher-rated categories.  However, the obligor's capacity to
     meet its financial commitment on the obligation is still strong.

     "BBB" - An obligation rated "BBB" exhibits adequate protection  parameters.
     However,  adverse economic  conditions or changing  circumstances  are more
     likely to lead to a weakened  capacity of the obligor to meet its financial
     commitment on the obligation.

     Obligations  rated "BB," "B,"  "CCC,"  "CC" and "C" are  regarded as having
significant  speculative  characteristics.  "BB"  indicates  the least degree of
speculation and "C" the highest.  While such  obligations  will likely have some
quality  and  protective  characteristics,  these  may be  outweighed  by  large
uncertainties or major exposures to adverse conditions.

     "BB" - An obligation rated "BB" is less vulnerable to nonpayment than other
     speculative  issues.  However,  it faces  major  ongoing  uncertainties  or
     exposure to adverse business,  financial or economic conditions which could
     lead to the obligor's  inadequate capacity to meet its financial commitment
     on the obligation.

     "B" - An  obligation  rated  "B" is  more  vulnerable  to  nonpayment  than
     obligations  rated "BB," but the obligor currently has the capacity to meet
     its financial commitment on the obligation.  Adverse business, financial or
     economic   conditions   will  likely  impair  the  obligor's   capacity  or
     willingness to meet its financial commitment on the obligation.

     "CCC" - An obligation  rated "CCC" is currently  vulnerable to  nonpayment,
     and is dependent upon favorable business, financial and economic conditions
     for the obligor to meet its financial commitment on the obligation.  In the
     event of adverse business,  financial, or economic conditions,  the obligor
     is not likely to have the capacity to meet its financial  commitment on the
     obligation.

     "CC"  -  An  obligation  rated  "CC"  is  currently  highly  vulnerable  to
     nonpayment.

     "C" - The "C" rating may be used to cover a  situation  where a  bankruptcy
     petition has been filed or similar  action has been taken,  but payments on
     this obligation are being continued.

     "D" - An  obligation  rated  "D" is in  payment  default.  The  "D"  rating
     category is used when  payments on an  obligation  are not made on the date
     due  even if the  applicable  grace  period  has not  expired,  unless  S&P
     believes that such payments will be made during such grace period.  The "D"
     rating  also will be used upon the filing of a  bankruptcy  petition or the
     taking of a similar action if payments on an obligation are jeopardized.

     PLUS (+) OR MINUS (-) - The ratings from "AA" through "CCC" may be modified
by the  addition of a plus or minus sign to show  relative  standing  within the
major rating categories.

     "r"  -  This  symbol  is  attached  to  the  ratings  of  instruments  with
significant  noncredit  risks. It highlights risks to principal or volatility of
expected returns which are not addressed in the credit rating. Examples include:
obligations  linked  or  indexed  to  equities,   currencies,   or  commodities;
obligations  exposed  to  severe  prepayment  risk - such  as  interest-only  or
principal-only  mortgage  securities;   and  obligations  with  unusually  risky
interest terms, such as inverse floaters.

     The  following  summarizes  the ratings used by Moody's for  corporate  and
municipal long-term debt:

     "Aaa" - Bonds are judged to be of the best quality. They carry the smallest
     degree of investment  risk and are  generally  referred to as "gilt edged."
     Interest  payments are protected by a large or by an  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 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 in "Aaa"  securities or  fluctuation  of
     protective  elements  may be of  greater  amplitude  or there  may be other
     elements  present which make the long-term risk appear somewhat larger than
     the "Aaa" securities.

     "A" - Bonds  possess many  favorable  investment  attributes  and are to be
     considered as  upper-medium-grade  obligations.  Factors giving security to
     principal and interest are considered adequate, but elements may be present
     which suggest a susceptibility to impairment sometime in the future.

     "Baa" - Bonds are considered as medium-grade  obligations,  (i.e., they are
     neither  highly  protected  nor  poorly  secured).  Interest  payments  and
     principal  security appear adequate for the present but certain  protective
     elements may be lacking or may be  characteristically  unreliable  over any
     great   length   of  time.   Such   bonds   lack   outstanding   investment
     characteristics and in fact have speculative characteristics as well.

     "Ba," "B," "Caa," "Ca," and "C" - Bonds that  possess one of these  ratings
     provide  questionable  protection of interest and principal ("Ba" indicates
     speculative  elements;  "B" indicates a general lack of  characteristics of
     desirable  investment;   "Caa"  are  of  poor  standing;   "Ca"  represents
     obligations which are speculative in a high degree;  and "C" represents the
     lowest rated class of bonds). "Caa," "Ca" and "C" bonds may be in default.

     Con.  (---) - Bonds for which the security  depends upon the  completion of
some act or the fulfillment of some condition are rated conditionally. These are
bonds secured by (a) earnings of projects  under  construction,  (b) earnings of
projects  unseasoned  in  operating  experience,  (c)  rentals  which begin when
facilities are completed, or (d) payments to which some other limiting condition
attaches.  Parenthetical  rating denotes probable credit stature upon completion
of construction or elimination of basis of condition.

     Note:  Moody's  applies  numerical  modifiers  1, 2, and 3 in each  generic
rating classification from "Aa" through "Caa". The modifier 1 indicates that the
obligation ranks in the higher end of its generic rating category;  the modifier
2 indicates a mid-range  ranking;  and the modifier 3 indicates a ranking in the
lower end of its generic rating category.

     The following  summarizes  the long-term debt ratings used by Duff & Phelps
for corporate and municipal long-term debt:

     "AAA" - Debt is considered to be of the highest  credit  quality.  The risk
     factors are  negligible,  being only slightly more than for risk-free  U.S.
     Treasury debt.

     "AA" - Debt is considered to be of high credit quality.  Protection factors
     are strong.  Risk is modest but may vary slightly from time to time because
     of economic conditions.

     "A" - Debt  possesses  protection  factors  which are average but adequate.
     However,  risk  factors are more  variable  in periods of greater  economic
     stress.

     "BBB" - Debt possesses below-average protection factors but such protection
     factors  are  still   considered   sufficient   for   prudent   investment.
     Considerable variability in risk is present during economic cycles.

     "BB," "B," "CCC," "DD," and "DP" - Debt that possesses one of these ratings
     is considered  to be below  investment  grade.  Although  below  investment
     grade,  debt rated "BB" is deemed likely to meet obligations when due. Debt
     rated "B"  possesses  the risk that  obligations  will not be met when due.
     Debt  rated  "CCC" is well  below  investment  grade  and has  considerable
     uncertainty  as to timely  payment  of  principal,  interest  or  preferred
     dividends.  Debt rated "DD" is a defaulted debt obligation,  and the rating
     "DP" represents preferred stock with dividend arrearages.

     To provide more  detailed  indications  of credit  quality,  the "AA," "A,"
"BBB," "BB" and "B"  ratings  may be  modified by the  addition of a plus (+) or
minus (-) sign to show relative standing within these major categories.

     The following  summarizes  the ratings used by Fitch IBCA for corporate and
municipal bonds:

     "AAA" - Bonds  considered to be investment  grade and of the highest credit
     quality. These ratings denote the lowest expectation of credit risk and 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" - Bonds  considered  to be  investment  grade and of very high  credit
     quality.  These ratings  denote a very low  expectation  of credit risk and
     indicate very strong capacity for timely payment of financial  commitments.
     This capacity is not significantly vulnerable to foreseeable events.

     "A" - Bonds  considered to be investment  grade and of high credit quality.
     These ratings denote a low  expectation of credit risk and indicate  strong
     capacity for timely  payment of financial  commitments.  This capacity may,
     nevertheless, be more vulnerable to changes in circumstances or in economic
     conditions than is the case for higher ratings.

     "BBB" - Bonds considered to be investment grade and of good credit quality.
     These ratings  denote that there is currently a low  expectation  of credit
     risk.  The  capacity  for  timely  payment  of  financial   commitments  is
     considered  adequate,  but adverse changes in circumstances and in economic
     conditions are more likely to impair this capacity.

     "BB" - Bonds  considered to be  speculative.  These  ratings  indicate that
     there is a  possibility  of credit  risk  developing,  particularly  as the
     result  of  adverse  economic  changes  over  time;  however,  business  or
     financial  alternatives may be available to allow financial  commitments to
     be met. Securities rated in this category are not investment grade.

     "B" - Bonds are considered highly speculative.  These ratings indicate that
     significant credit risk is present, but a limited margin of safety remains.
     Financial  commitments  are  currently  being met;  however,  capacity  for
     continued  payment is contingent upon a sustained,  favorable  business and
     economic environment.

     "CCC",  "CC" and "C" - Bonds  have high  default  risk.  Default  is a real
     possibility,  and  capacity  for meeting  financial  commitments  is solely
     reliant upon sustained,  favorable business or economic developments.  "CC"
     ratings  indicate  that  default  of some kind  appears  probable,  and "C"
     ratings signal imminent default.

     "DDD,"  "DD" and "D" - Bonds are in  default.  Securities  are not  meeting
     obligations  and are extremely  speculative.  "DDD"  designates the highest
     potential for recovery of amounts  outstanding on any  securities  involved
     and "D" represents the lowest potential for recovery.

     To provide more  detailed  indications  of credit  quality,  the Fitch IBCA
ratings from and including "AA" to "B" may be modified by the addition of a plus
(+) or minus  (-) sign to show  relative  standing  within  these  major  rating
categories.

     Thomson  BankWatch  assesses  the  likelihood  of an untimely  repayment of
principal or interest  over the term to maturity of long term debt and preferred
stock which are issued by United States commercial  banks,  thrifts and non-bank
banks; non-United States banks; and broker-dealers. The following summarizes the
rating categories used by Thomson BankWatch for long-term debt ratings:

     "AAA" - This designation  indicates that the ability to repay principal and
     interest on a timely basis is extremely high.

     "AA" - This designation  indicates a very strong ability to repay principal
     and interest on a timely basis,  with limited  incremental risk compared to
     issues rated in the highest category.

     "A" - This  designation  indicates that the ability to repay principal
     and  interest  is  strong.  Issues  rated "A" could be more  vulnerable  to
     adverse  developments  (both internal and external) than  obligations  with
     higher ratings.

     "BBB" - This designation  represents the lowest  investment-grade  category
     and  indicates an  acceptable  capacity to repay  principal  and  interest.
     Issues  rated  "BBB" are more  vulnerable  to  adverse  developments  (both
     internal and external) than obligations with higher ratings.

     "BB," "B,"  "CCC," and "CC" - These  designations  are  assigned by Thomson
     BankWatch to non-investment  grade long-term debt. Such issues are regarded
     as having  speculative  characteristics  regarding the likelihood of timely
     payment of principal  and  interest.  "BB"  indicates  the lowest degree of
     speculation and "CC" the highest degree of speculation.

     "D" - This designation indicates that the long-term debt is in default.

     PLUS (+) OR MINUS (-) - The ratings  from "AAA"  through "CC" may include a
plus or minus sign  designation  which  indicates  where  within the  respective
category the issue is placed.

MUNICIPAL NOTE RATINGS

     A Standard and Poor's  rating  reflects the  liquidity  concerns and market
access  risks  unique  to notes  due in  three  years  or  less.  The  following
summarizes  the ratings used by Standard & Poor's  Ratings  Group for  municipal
notes:

     "SP-1" - The issuers of these  municipal notes exhibit a strong capacity to
     pay principal and interest.  Those issues determined to possess very strong
     characteristics are given a plus (+) designation.

     "SP-2" - The issuers of these municipal notes exhibit satisfactory capacity
     to pay principal and interest, with some vulnerability to adverse financial
     and economic changes over the term of the notes.

     "SP-3" - The issuers of these municipal notes exhibit speculative  capacity
     to pay principal and interest.

     Moody's  ratings for state and municipal notes and other  short-term  loans
are  designated  Moody's  Investment  Grade  ("MIG")  and  variable  rate demand
obligations are designated  Variable  Moody's  Investment  Grade ("VMIG").  Such
ratings recognize the differences  between  short-term credit risk and long-term
risk. The following  summarizes the ratings by Moody's Investors  Service,  Inc.
for short-term notes:

     "MIG-1"/"VMIG-1" - This designation denotes best quality.  There is present
     strong protection by established cash flows,  superior liquidity support or
     demonstrated broad-based access to the market for refinancing.

     "MIG-2"/"VMIG-2" - This designation  denotes high quality,  with margins of
     protection that are ample although not so large as in the preceding group.

     "MIG-3"/"VMIG-3"  - This designation  denotes favorable  quality,  with all
     security elements accounted for but lacking the undeniable  strength of the
     preceding  grades.  Liquidity  and cash flow  protection  may be narrow and
     market access for refinancing is likely to be less well established.

     "MIG-4"/"VMIG-4"  - This designation  denotes adequate quality.  Protection
     commonly  regarded  as required  of an  investment  security is present and
     although not  distinctly or  predominantly  speculative,  there is specific
     risk.

     "SG" - This designation  denotes speculative  quality.  Debt instruments in
     this category lack of margins of protection.

     Fitch IBCA and Duff & Phelps use the  short-term  ratings  described  under
Commercial Paper Ratings for municipal notes.

                                   APPENDIX B

     To the  extent  stated in the  Prospectus,  the  Portfolio  may enter  into
certain futures transactions. Such transactions are described in this Appendix.

I.         Interest Rate Futures Contracts

     Use of Interest Rate Futures Contracts. Bond prices are established in both
the cash market and the futures market. In the cash market,  bonds are purchased
and sold with  payment  for the full  purchase  price of the bond  being made in
cash,  generally  within  five  business  days after the trade.  In the  futures
market,  only a contract  is made to purchase or sell a bond in the future for a
set price on a certain date.  Historically,  the prices for bonds established in
the futures  markets have tended to move  generally in the  aggregate in concert
with  the  cash   market   prices  and  have   maintained   fairly   predictable
relationships.   Accordingly,  the  Portfolio  may  use  interest  rate  futures
contracts as a defense, or hedge,  against anticipated interest rate changes. As
described below, this would include the use of futures contract sales to protect
against expected  increases in interest rates and futures contract  purchases to
offset the impact of interest rate declines.

     The Portfolio  presently could accomplish a similar result to that which it
hopes to achieve through the use of futures contracts by selling bonds with long
maturities and investing in bonds with short  maturities when interest rates are
expected to increase,  or conversely,  selling short-term bonds and investing in
long-term bonds when interest rates are expected to decline. However, because of
the liquidity that is often available in the futures  market,  the protection is
more likely to be  achieved,  perhaps at a lower cost and without  changing  the
rate of interest being earned by the Portfolio, by using futures contracts.

     Interest  rate  future  contracts  can  also be used by the  Portfolio  for
non-hedging (speculative) purposes to increase total return.


     Description  of Interest Rate Futures  Contracts.  An interest rate futures
contract sale would create an obligation by the Portfolio, as seller, to deliver
the  specific  type of  financial  instrument  called for in the  contract  at a
specific future time for a specified  price. A futures  contract  purchase would
create an obligation  by the  Portfolio,  as purchaser,  to take delivery of the
specific type of financial  instrument  at a specific  future time at a specific
price. The specific securities delivered or taken,  respectively,  at settlement
date,  would not be  determined  until at or near that date.  The  determination
would be in  accordance  with the rules of the  exchange  on which  the  futures
contract sale or purchase was made.

     Although  interest  rate  futures  contracts by their terms call for actual
delivery or acceptance of securities, in most cases the contracts are closed out
before  the  settlement  date  without  the  making  or taking  of  delivery  of
securities.  Closing out a futures  contract sale is effected by the Portfolio's
entering into a futures  contract  purchase for the same aggregate amount of the
specific type of financial  instrument  and the same delivery date. If the price
of the sale  exceeds the price of the  offsetting  purchase,  the  Portfolio  is
immediately  paid the  difference  and thus realizes a gain.  If the  offsetting
purchase  price exceeds the sale price,  the Portfolio  pays the  difference and
realizes a loss.  Similarly,  the closing out of a futures contract  purchase is
effected  by  the  Portfolio  entering  into a  futures  contract  sale.  If the
offsetting sale price exceeds the purchase price, the Portfolio realizes a gain,
and if the purchase  price  exceeds the  offsetting  sale price,  the  Portfolio
realizes a loss.

     Interest rate futures contracts are traded in an auction environment on the
floors of several  exchanges --  principally,  the Chicago  Board of Trade,  the
Chicago  Mercantile  Exchange and the New York Futures  Exchange.  Each exchange
guarantees performance under contract provisions through a clearing corporation,
a nonprofit organization managed by the exchange membership.

     A public market now exists in futures contracts  covering various financial
instruments  including  long-term  U.S.  Treasury  Bonds and  Notes;  Government
National  Mortgage  Association  (GNMA)  modified  pass-through  mortgage backed
securities;  three-month U.S.  Treasury Bills; and ninety-day  commercial paper.
The Portfolio  may trade in any interest rate futures  contracts for which there
exists  a  public  market,   including,   without   limitation,   the  foregoing
instruments.

II.        Index Futures Contracts

     General.  A stock or bond index  assigns  relative  values to the stocks or
bonds included in the index,  which fluctuates with changes in the market values
of the stocks or bonds included. Some stock index futures contracts are based on
broad  market  indexes,  such as  Standard  & Poor's  500 or the New York  Stock
Exchange Composite Index. In contrast, certain exchanges offer futures contracts
on narrower market  indexes,  such as the Standard & Poor's 100 or indexes based
on an industry or market indexes, such as Standard & Poor's 100 or indexes based
on an industry or market segment, such as oil and gas stocks.  Futures contracts
are traded on organized  exchanges  regulated by the Commodity  Futures  Trading
Commission.  Transactions  on such  exchanges  are  cleared  through a  clearing
corporation,  which  guarantees the performance of the parties to each contract.
To the extent consistent with its investment  objective,  the Portfolio may also
engage in  transactions,  from time to time, in foreign stock index futures such
as the ALL-ORDS  (Australia),  CAC-40  (France),  TOPIX (Japan) and the FTSE-100
(United Kingdom).

     The  Portfolio  may sell  index  futures  contracts  in  order to  offset a
decrease in market value of its portfolio securities that might otherwise result
from a market decline.  The Portfolio may do so either to hedge the value of its
portfolio as a whole, or to protect against  declines,  occurring prior to sales
of  securities,  in the  value of the  securities  to be sold.  Conversely,  the
Portfolio will purchase index futures  contracts in anticipation of purchases of
securities.  A long futures  position may be terminated  without a corresponding
purchase of securities.

     In  addition,   the  Portfolio  may  utilize  index  futures  contracts  in
anticipation  of changes  in the  composition  of its  portfolio  holdings.  For
example, in the event that the Portfolio expects to narrow the range of industry
groups  represented  in its  holdings it may,  prior to making  purchases of the
actual securities,  establish a long futures position based on a more restricted
index, such as an index comprised of securities of a particular  industry group.
The Portfolio may also sell futures  contracts in connection with this strategy,
in order to protect against the possibility  that the value of the securities to
be sold as part of the  restructuring of the portfolio will decline prior to the
time of sale.

     Index futures  contracts may also be used by the Portfolio for  non-hedging
(speculative) purposes to increase total return.

III.       Futures Contracts on Foreign Currencies

     A futures contract on foreign currency creates a binding  obligation on one
party to deliver,  and a  corresponding  obligation  on another  party to accept
delivery of, a stated quantity of foreign currency,  for an amount fixed in U.S.
dollars.  Foreign currency futures may be used by the Portfolio to hedge against
exposure to  fluctuations  in exchange  rates between the U.S.  dollar and other
currencies arising from multinational transactions.

IV.        Margin Payments

     Unlike  purchases  or sales of  portfolio  securities,  no price is paid or
received  by the  Portfolio  upon the  purchase  or sale of a futures  contract.
Initially,  the  Portfolio  will be required to deposit  with the broker or in a
segregated account with a custodian or sub-custodian an amount of liquid assets,
known as  initial  margin,  based on the value of the  contract.  The  nature of
initial  margin in  futures  transactions  is  different  from that of margin in
security  transactions  in that  futures  contract  margin  does not involve the
borrowing  of funds by the  customer to finance the  transactions.  Rather,  the
initial  margin is in the nature of a performance  bond or good faith deposit on
the contract which is returned to the Portfolio upon  termination of the futures
contract  assuming all contractual  obligations have been satisfied.  Subsequent
payments,  called variation  margin,  to and from the broker,  will be made on a
daily basis as the price of the  underlying  instruments  fluctuates  making the
long and short  positions  in the  futures  contract  more or less  valuable,  a
process  known as  "marking-to-market."  For  example,  when the  Portfolio  has
purchased a futures contract and the price of the contract has risen in response
to a rise in the  underlying  instruments,  that position will have increased in
value and the Portfolio  will be entitled to receive from the broker a variation
margin payment equal to that increase in value. Conversely,  where the Portfolio
has  purchased  a futures  contract  and the price of the  future  contract  has
declined in response to a decrease in the underlying  instruments,  the position
would be less valuable and the  Portfolio  would be required to make a variation
margin  payment to the broker.  Prior to  expiration  of the  futures  contract,
Investment  Adviser  may elect to close  the  position  by  taking  an  opposite
position,  subject to the availability of a secondary market, which will operate
to  terminate  the  Portfolio's  position  in  the  futures  contract.  A  final
determination of variation  margin is then made,  additional cash is required to
be paid by or released to the  Portfolio,  and the Portfolio  realizes a loss or
gain.

V.         Risks of Transactions in Futures Contracts

     There  are  several  risks in  connection  with the use of  futures  by the
Portfolio.  One  risk  arises  because  of  the  imperfect  correlation  between
movements  in the  price  of the  futures  and  movements  in the  price  of the
instruments which are the subject of the hedge. The price of the future may move
more than or less than the price of the instruments  being hedged.  If the price
of the  futures  moves  less  than the  price of the  instruments  which are the
subject of the hedge, the hedge will not be fully effective but, if the price of
the  instruments  being  hedged  has  moved  in an  unfavorable  direction,  the
Portfolio would be in a better position than if it had not hedged at all. If the
price of the instruments being hedged has moved in a favorable  direction,  this
advantage will be partially  offset by the loss on the futures.  If the price of
the futures moves more than the price of the hedged  instruments,  the Portfolio
involved will experience  either a loss or gain on the futures which will not be
completely  offset by  movements in the price of the  instruments  which are the
subject of the hedge.  To compensate for the imperfect  correlation of movements
in the price of  instruments  being hedged and movements in the price of futures
contracts,  the Portfolio may buy or sell futures  contracts in a greater dollar
amount than the dollar amount of instruments being hedged if the volatility over
a particular time period of the prices of such instruments has been greater than
the volatility over such time period of the futures,  or if otherwise  deemed to
be appropriate by the Investment Adviser.  Conversely,  the Portfolio may buy or
sell fewer futures  contracts if the volatility over a particular time period of
the prices of the instruments being hedged is less than the volatility over such
time period of the futures  contract  being used,  or if otherwise  deemed to be
appropriate  by the  Investment  Adviser.  It is also possible  that,  where the
Portfolio  has sold  futures  to hedge its  portfolio  against a decline  in the
market,  the  market  may  advance  and the  value  of  instruments  held in the
Portfolio may decline.  If this occurred,  the Portfolio would lose money on the
futures and also experience a decline in value in its portfolio securities.

     When  futures are  purchased  to hedge  against a possible  increase in the
price of  securities  or a currency  before the  Portfolio is able to invest its
cash (or cash equivalents) in an orderly fashion, it is possible that the market
may decline  instead;  if the Portfolio then concludes not to invest its cash at
that time because of concern as to possible  further market decline or for other
reasons,  the Portfolio will realize a loss on the futures  contract that is not
offset by a reduction in the price of the instruments that were to be purchased.

     In addition to the possibility that there may be an imperfect  correlation,
or no correlation at all,  between  movements in the futures and the instruments
being hedged, the price of futures may not correlate  perfectly with movement in
the  cash  market  due  to  certain  market  distortions.  Rather  than  meeting
additional  margin deposit  requirements,  investors may close futures contracts
through  off-setting  transactions  which could distort the normal  relationship
between the cash and futures markets.  Second, with respect to financial futures
contracts,  the liquidity of the futures market depends on participants entering
into  off-setting  transactions  rather than making or taking  delivery.  To the
extent  participants  decide to make or take delivery,  liquidity in the futures
market could be reduced thus  producing  distortions.  Third,  from the point of
view of  speculators,  the deposit  requirements  in the futures market are less
onerous than margin requirements in the securities market. Therefore,  increased
participation  by  speculators  in the futures  market may also cause  temporary
price  distortions.  Due to the  possibility of price  distortion in the futures
market,  and because of the imperfect  correlation  between the movements in the
cash market and movements in the price of futures, a correct forecast of general
market trends or interest rate movements by the Investment Adviser may still not
result in a successful hedging transaction over a short time frame.

     Positions  in  futures  may be closed out only on an  exchange  or board of
trade which provides a secondary market for such futures. Although the Portfolio
intends to purchase or sell  futures  only on exchanges or boards of trade where
there appear to be active secondary markets, there is no assurance that a liquid
secondary market on any exchange or board of trade will exist for any particular
contract or at any  particular  time.  In such event,  it may not be possible to
close  a  futures  investment  position,  and  in the  event  of  adverse  price
movements,  the  Portfolio  would  continue  to be  required  to make daily cash
payments of variation margin.  However, in the event futures contracts have been
used to hedge portfolio  securities,  such securities will not be sold until the
futures contract can be terminated.  In such  circumstances,  an increase in the
price of the  securities,  if any, may partially or completely  offset losses on
the futures contract.  However,  as described above,  there is no guarantee that
the price of the securities  will in fact correlate with the price  movements in
the futures contract and thus provide an offset on a futures contract.

     Further,  it should be noted that the liquidity of a secondary  market in a
futures contract may be adversely  affected by "daily price fluctuation  limits"
established  by commodity  exchanges  which limit the amount of fluctuation in a
futures  contract  price during a single  trading day.  Once the daily limit has
been  reached in the  contract,  no trades may be entered into at a price beyond
the limit,  thus  preventing  the  liquidation  of open futures  positions.  The
trading  of futures  contracts  is also  subject  to the risk of trading  halts,
suspensions,   exchange  or  clearing  house  equipment   failures,   government
intervention,  insolvency  of a  brokerage  firm  or  clearing  house  or  other
disruptions of normal trading  activity,  which could at times make it difficult
or impossible to liquidate  existing  positions or to recover  excess  variation
margin payments.

     Successful  use  of  futures  by  the  Portfolio  is  also  subject  to the
Investment  Adviser's ability to predict correctly movements in the direction of
the market. For example,  if the Portfolio has hedged against the possibility of
a decline in the market adversely affecting securities held by it and securities
prices increase  instead,  the Portfolio will lose part or all of the benefit to
the increased  value of its securities  which it has hedged because it will have
offsetting losses in its futures positions. In addition, in such situations,  if
the Portfolio  has  insufficient  cash,  it may have to sell  securities to meet
daily variation margin  requirements.  Such sales of securities may be, but will
not  necessarily  be, at increased  prices which reflect the rising market.  The
Portfolio may have to sell  securities at a time when it may be  disadvantageous
to do so.

VI.        Options on Futures Contracts

     The  Portfolio  may  purchase  and write  options on the futures  contracts
described  above. A futures  option gives the holder,  in return for the premium
paid,  the right to buy (call)  from or sell (put) to the writer of the option a
futures  contract  at a  specified  price at any time  during  the period of the
option.  Upon  exercise,  the  writer  of the  option  is  obligated  to pay the
difference  between  the cash value of the  futures  contract  and the  exercise
price. Like the buyer or seller of a futures contract, the holder, or writer, of
an  option  has the  right to  terminate  its  position  prior to the  scheduled
expiration of the option by selling, or purchasing an option of the same series,
at which time the person  entering into the closing  transaction  will realize a
gain or loss.  The  Portfolio  will be  required to deposit  initial  margin and
variation  margin  with  respect to put and call  options  on futures  contracts
written by it  pursuant  to  brokers'  requirements  similar to those  described
above. Net option premiums received will be included as initial margin deposits.
As an example, in anticipation of a decline in interest rates, the Portfolio may
purchase call options on futures  contracts as a substitute  for the purchase of
futures  contracts  to  hedge  against  a  possible  increase  in the  price  of
securities which the Portfolio intends to purchase.  Similarly,  if the value of
the  securities  held by the  Portfolio is expected to decline as a result of an
increase in interest  rates,  the Portfolio  might  purchase put options or sell
call options on futures contracts rather than sell futures contracts.

     Investments in futures options involve some of the same considerations that
are involved in connection with  investments in futures  contracts (for example,
the existence of a liquid secondary market).  In addition,  the purchase or sale
of an option also entails the risk that  changes in the value of the  underlying
futures  contract  will not  correspond  to  changes  in the value of the option
purchased. Depending on the pricing of the option compared to either the futures
contract  upon  which it is  based,  or upon the price of the  securities  being
hedged,  an option may or may not be less risky than  ownership  of the  futures
contract or such  securities.  In general,  the market  prices of options can be
expected to be more volatile than the market  prices on the  underlying  futures
contract.  Compared to the purchase or sale of futures contracts,  however,  the
purchase of call or put options on futures contracts may frequently involve less
potential  risk to the  Portfolio  because  the  maximum  amount  at risk is the
premium paid for the options (plus transaction  costs). The writing of an option
on a futures contract involves risks similar to those risks relating to the sale
of futures contracts.

VII.       Other Matters

     Accounting  for futures  contracts  will be in  accordance  with  generally
accepted accounting principles.



                                       PART B

                       STATEMENT OF ADDITIONAL INFORMATION

                                     SHARES

                          NORTHERN INSTITUTIONAL FUNDS

                               MUNICIPAL PORTFOLIO

     This Statement of Additional Information dated October ___ (the "Additional
Statement") is not a prospectus.  Copies of the  prospectus  dated October ____,
1999 for the Shares of the Municipal  Portfolio  (the  "Portfolio")  of Northern
Institutional Funds (the "Prospectus") may be obtained without charge by calling
1-800-637-1380  (toll-free).  The  Portfolio  also offers two  additional  share
classes,  Service Shares and Premier  Shares,  which are described in a separate
statement of additional  information.  Capitalized  terms not otherwise  defined
have the same meaning as in the Prospectus.


                                      INDEX

                                                                            Page

ADDITIONAL INVESTMENT INFORMATION.........................................
             Classification and History...................................
             Investment Objective, Strategies and Risks...................
             Investment Restrictions......................................

ADDITIONAL TRUST INFORMATION..............................................
             Trustees and Officers........................................
             Investment Adviser, Transfer Agent and Custodian.............
             Portfolio Transactions.......................................
             Co-Administrators and Distributor............................
             Counsel and Auditors.........................................
             In-Kind Purchases and Redemptions............................
             Third-Party Fees and Requirements............................

PERFORMANCE INFORMATION...................................................

AMORTIZED COST VALUATION..................................................

DESCRIPTION OF SHARES.....................................................

ADDITIONAL INFORMATION CONCERNING TAXES...................................
             General......................................................
             Foreign Investors............................................
             Conclusion...................................................

OTHER INFORMATION.........................................................

APPENDIX A................................................................

     No  person  has  been  authorized  to give any  information  or to make any
representations not contained in this Additional  Statement or in the Prospectus
in connection  with the offering of Shares made by the Prospectus  and, if given
or made, such information or  representations  must not be relied upon as having
been  authorized  by the  Trust  or its  distributor.  The  Prospectus  does not
constitute an offering by the Trust or by the distributor in any jurisdiction in
which such offering may not lawfully be made.

     An  investment  in the  Portfolio  is not a deposit  of any bank and is not
insured or guaranteed by the Federal Deposit Insurance  Corporation or any other
government  agency.  Although the Portfolio  seeks to preserve the value of your
investment at $1.00 per share,  it is possible to lose money by investing in the
Portfolio.

                        ADDITIONAL INVESTMENT INFORMATION

                           Classification and History

     Northern  Institutional  Funds (the  "Trust")  is an  open-end,  management
investment  company.  The  Portfolio  is  classified  as  diversified  under the
Investment Company Act of 1940, as amended (the "1940 Act").

     The  Portfolio  is a series of the  Trust,  which was  formed as a Delaware
business trust on July 1, 1997 under an Agreement and  Declaration of Trust (the
"Trust  Agreement").   The  Trust  is  the  result  of  a  reorganization  of  a
Massachusetts business trust known as The Benchmark Funds on March 31, 1998. The
Trust's name was changed from The Benchmark Funds to the Northern  Institutional
Funds on July 15,  1998.  The Trust  also  offers six fixed  income,  four money
market, one balanced,  and seven equity  portfolios,  which are not described in
this document.

Investment Objective, Strategies and Risks

     The following supplements the investment objective, strategies and risks of
the Portfolio as set forth in the  Prospectus.  Except as expressly noted below,
the  investment   objective  and  policies  of  the  Portfolio  may  be  changed
shareholder approval.

Commercial Paper,  Bankers'  Acceptances,  Certificates of Deposit and Time
Deposits

     Commercial paper represents short-term unsecured promissory notes issued in
bearer  form by  banks  or bank  holding  companies,  corporations  and  finance
companies.  Certificates of deposit are negotiable  certificates  issued against
funds deposited in a commercial bank for a definite period of time and earning a
specified  return.  Bankers'  acceptances  are  negotiable  drafts  or  bills of
exchange,  normally  drawn  by an  importer  or  exporter  to pay  for  specific
merchandise,  which are "accepted" by a bank,  meaning, in effect, that the bank
unconditionally  agrees to pay the face  value of the  instrument  on  maturity.
Fixed time deposits are bank  obligations  payable at a stated maturity date and
bearing interest at a fixed rate. Fixed time deposits may be withdrawn on demand
by the  investor,  but may be subject to early  withdrawal  penalties  that vary
depending upon market  conditions and the remaining  maturity of the obligation.
There are no  contractual  restrictions  on the right to  transfer a  beneficial
interest  in a fixed time  deposit  to a third  party.  Bank notes and  bankers'
acceptances  rank junior to deposit  liabilities of the bank and pari passu with
other senior,  unsecured  obligations of the bank.  Bank notes are classified as
"other   borrowings"  on  a  bank's  balance  sheet,  while  deposit  notes  and
certificates  of deposit are classified as deposits.  Bank notes are not insured
by the Federal Deposit Insurance Corporation or any other insurer. Deposit notes
are insured by the Federal Deposit  Insurance  Corporation only to the extent of
$100,000 per depositor per bank.

     The  Portfolio  may invest a portion of its  assets in the  obligations  of
foreign banks and foreign branches of domestic banks.  Such obligations  include
Eurodollar  Certificates of Deposit  ("ECDs") which are U.S.  dollar-denominated
certificates  of deposit issued by offices of foreign and domestic banks located
outside the United States;  Eurodollar  Time Deposits  ("ETDs"),  which are U.S.
dollar-denominated  deposits  in a foreign  branch  of a U.S.  bank or a foreign
bank;  Canadian Time Deposits  ("CTDs"),  which are essentially the same as ETDs
except they are issued by Canadian offices of major Canadian banks; Schedule Bs,
which are obligations  issued by Canadian branches of foreign or domestic banks;
Yankee Certificates of Deposit ("Yankee CDs") which are U.S.  dollar-denominated
certificates  of deposit  issued by a U.S.  branch of a foreign bank and held in
the United States;  and Yankee Bankers'  Acceptances  ("Yankee BAs"),  which are
U.S.  dollar-denominated  bankers'  acceptances  issued  by a U.S.  branch  of a
foreign bank and held in the United States.

Zero Coupon

     To the extent consistent with its investment  objective,  the Portfolio may
invest in zero coupon  bonds.  Zero coupon bonds are debt  securities  issued or
sold at a discount  from their face value and which do not entitle the holder to
any  periodic  payment of interest  prior to maturity or a specified  date.  The
original issue discount varies depending on the time remaining until maturity or
cash payment date,  prevailing interest rates, the liquidity of the security and
perceived credit quality of the issuer.  These securities also may take the form
of debt securities that have been stripped of their unmatured  interest coupons,
the coupons  themselves or receipts or  certificates  representing  interests in
such  stripped  debt  obligations  or coupons.  The market prices of zero coupon
bonds  generally are more  volatile  than the market prices of interest  bearing
securities  and are likely to respond to a greater degree of changes in interest
rates than interest  bearing  securities  having  similar  maturities and credit
quality.

     Zero coupon bonds involve the additional risk that,  unlike securities that
periodically pay interest to maturity,  the Portfolio will realize no cash until
a specified future payment date unless a portion of such securities is sold and,
if the issuer of such securities defaults, the Portfolio may obtain no return at
all on its  investment.  In addition,  even though such securities do no provide
for the  payment of current  interest  in cash,  the  Portfolio  is  nonetheless
required to accrue income on such investment for each taxable year and generally
is required to distribute such accrued amounts (net of deductible  expenses,  if
any) to avoid being subject to tax. Because no cash is generally received at the
time of the accrual,  the Portfolio may be required to liquidate other portfolio
securities  to  obtain  sufficient  cash to  satisfy  Federal  tax  distribution
requirements applicable to the Portfolio.

U.S. Government Obligations

     Examples of the types of U.S.  Government  obligations that may be acquired
by the Portfolio include U.S. Treasury Bills,  Treasury Notes and Treasury Bonds
and the  obligations  of Federal  Home Loan Banks,  Federal  Farm Credit  Banks,
Federal  Land  Banks,   the  Federal   Housing   Administration,   Farmers  Home
Administration,   Export-Import  Bank  of  the  United  States,  Small  Business
Administration,  Federal  National  Mortgage  Association  ("FNMA"),  Government
National Mortgage Association ("GNMA"), General Services Administration, Central
Bank for Cooperatives, Federal Home Loan Mortgage Corporation ("FHLMC"), Federal
Intermediate Credit Banks, and the Maritime Administration.

     Securities  guaranteed  as to  principal  and interest by the U.S.
Government,  its  agencies or  instrumentalities  are also deemed to include (a)
securities  for which the  payment of  principal  and  interest  is backed by an
irrevocable  letter of credit  issued by the U.S.  Government  or any  agency or
instrumentality  thereof,  and (b)  participations  in  loans  made  to  foreign
governments or their agencies that are so guaranteed.

     To the extent consistent with its investment  objective,  the Portfolio may
invest in a variety of U.S.  Treasury  obligations and obligations  issued by or
guaranteed by the U.S. Government or its agencies and instrumentalities. Not all
U.S.  Government  obligations carry the same credit support. No assurance can be
given that the U.S.  Government would provide  financial support to its agencies
or  instrumentalities  if it is not obligated to do so by law. In addition,  the
secondary market for certain participations in loans made to foreign governments
or their agencies may be limited.

Asset-Backed Securities

     To the extent  described  in the  Prospectus,  the  Portfolio  may purchase
asset-backed securities,  which are securities backed by mortgages,  installment
contracts,  credit card  receivables  or other assets.  Asset-backed  securities
represent  interests in "pools" of assets in which payments of both interest and
principal  on the  securities  are made  periodically,  thus in effect  "passing
through"  such  payments  made by the  individual  borrowers  on the assets that
underlie the securities,  net of any fees paid to the issuer or guarantor of the
securities.  The  average  life  of  asset-backed  securities  varies  with  the
maturities  of  the   underlying   instruments,   and  the  average  life  of  a
mortgage-backed  instrument,  in particular,  is likely to be substantially less
than the original  maturity of the mortgage pools underlying the securities as a
result of mortgage  prepayments.  For this and other  reasons,  an  asset-backed
security's stated maturity may be shortened, and the security's total return may
be difficult to predict precisely.

     If an  asset-backed  security is purchased at a premium,  a prepayment rate
that is faster than expected  will reduce yield to maturity,  while a prepayment
rate that is slower than  expected  will have the opposite  effect of increasing
yield to maturity.  Conversely,  if an  asset-backed  security is purchased at a
discount,  faster than expected  prepayments  will  increase,  while slower than
expected prepayments will decrease, yield to maturity.

     Prepayments  on  asset-backed  securities  generally  increase with falling
interest rates and decrease with rising interest rates; furthermore,  prepayment
rates are  influenced by a variety of economic and social  factors.  In general,
the collateral  supporting  non-mortgage  asset-backed  securities is of shorter
maturity  than  mortgage  loans  and is less  likely to  experience  substantial
prepayments.

     Asset-backed   securities   acquired   by   the   Portfolio   may   include
collateralized  mortgage obligations ("CMOs") issued by private companies.  CMOs
provide  the  holder  with a  specified  interest  in the cash flow of a pool of
underlying  mortgages  or  other  mortgage-backed  securities.  Issuers  of CMOs
ordinarily  elect to be  taxed as  pass-through  entities  known as real  estate
mortgage  investment conduits  ("REMICs").  CMOs are issued in multiple classes,
each with a specified fixed or floating  interest rate and a final  distribution
date.  The relative  payment rights of the various CMO classes may be structured
in a variety of ways. The Portfolio will not purchase  "residual" CMO interests,
which normally exhibit greater price volatility.

     There  are a  number  of  important  differences  among  the  agencies  and
instrumentalities of the U.S. Government that issue mortgage-related  securities
and among the securities that they issue. Mortgage-related securities guaranteed
by the GNMA  include  GNMA  Mortgage  Pass-Through  Certificates  (also known as
"Ginnie  Maes"),  which are guaranteed as to the timely payment of principal and
interest  by GNMA and backed by the full faith and credit of the United  States.
GNMA is a  wholly-owned  U.S.  Government  corporation  within the Department of
Housing and Urban  Development.  GNMA  certificates  also are  supported  by the
authority of GNMA to borrow funds from the U.S.  Treasury to make payments under
its guarantee. Mortgage-backed securities issued by FNMA include FNMA Guaranteed
Mortgage  Pass-Through  Certificates  (also known as "Fannie  Maes"),  which are
solely the  obligations  of FNMA and are not backed by or entitled to full faith
and credit of the United States, but are supported by the right of the issuer to
borrow from the  Treasury.  FNMA is a  government-sponsored  organization  owned
entirely  by  private  stockholders.  Fannie  Maes are  guaranteed  as to timely
payment of the  principal  and  interest  by FNMA.  Mortgage-related  securities
issued by the FHLMC  include FHLMC  Mortgage  Participation  Certificates  (also
known as "Freddie Macs" or "Pcs").  FHLMC is a corporate  instrumentality of the
United States,  created pursuant to an Act of Congress,  which is owned entirely
by  Federal  Home  Loan  Banks.  Freddie  Macs  are  not  guaranteed  and do not
constitute a debt or obligation of the United States or of any Federal Home Loan
Bank.  Freddie Macs entitle the holder to timely  payment of interest,  which is
guaranteed  by FHLMC.  FHLMC  guarantees  either  ultimate  collection or timely
payment of all principal  payments on the underlying  mortgage loans. When FHLMC
does not guarantee  timely payment of principal,  FHLMC may remit the amount due
on account of its  guarantee of ultimate  payment of principal at any time after
default on an underlying mortgage,  but in no event later than one year after it
becomes payable.

     Non-mortgage  asset-backed  securities  involve  certain risks that are not
presented by mortgage-backed securities. Primarily, these securities do not have
the benefit of the same security interest in the underlying  collateral.  Credit
card  receivables  are  generally  unsecured and the debtors are entitled to the
protection of a number of state and Federal  consumer credit laws, many of which
have  given  debtors  the right to set off  certain  amounts  owed on the credit
cards, thereby reducing the balance due. Most issuers of automobile  receivables
permit the servicers to retain possession of the underlying obligations.  If the
servicer were to sell these  obligations to another party,  there is a risk that
the purchaser  would acquire an interest  superior to that of the holders of the
related  automobile  receivables.  In  addition,  because of the large number of
vehicles involved in a typical issuance and technical  requirements  under state
laws, the trustee for the holders of the automobile  receivables may not have an
effective security interest in all of the obligations  backing such receivables.
Therefore,  there is a possibility that recoveries on repossessed collateral may
not, in some cases, be able to support payments on these securities.

Supranational Bank Obligations

     The  Portfolio  may  invest  in   obligations   of   supranational   banks.
Supranational banks are international banking institutions designed or supported
by national governments to promote economic reconstruction, development or trade
among nations (e.g., the International Bank for Reconstruction and Development).
Obligations of  supranational  banks may be supported by appropriated but unpaid
commitments  of their  member  countries  and there is no  assurance  that these
commitments will be undertaken or met in the future.

Custodial Receipts for Treasury Securities

     The Portfolio may acquire U.S.  Government  obligations and their unmatured
interest  coupons  that  have  been  separated  ("stripped")  by  their  holder,
typically a custodian bank or investment  brokerage firm.  Having  separated the
interest  coupons  from  the  underlying   principal  of  the  U.S.   Government
obligations, the holder will resell the stripped securities in custodial receipt
programs with a number of different  names,  including  "Treasury  Income Growth
Receipts" ("TIGRs") and "Certificate of Accrual on Treasury Securities" ("CATS).
The stripped coupons are sold separately from the underlying principal, which is
usually sold at a deep  discount  because the buyer  receives  only the right to
receive a future  fixed  payment on the security and does not receive any rights
to periodic  interest (cash)  payments.  The underlying U.S.  Treasury bonds and
notes  themselves are held in book-entry form at the Federal Reserve Bank or, in
the  case  of  bearer  securities  (i.e.,   unregistered  securities  which  are
ostensibly  owned by the bearer or  holder),  in trust on behalf of the  owners.
Counsel  to the  underwriters  of  these  certificates  or  other  evidences  of
ownership  of U.S.  Treasury  securities  have  state  that,  in their  opinion,
purchasers of the stripped  securities most likely will be deemed the beneficial
holders of the underlying U.S. Government  obligations for Federal tax purposes.
The Trust is unaware of any  binding  legislative,  judicial  or  administrative
authority on this issue.

U.S. Treasury STRIPS

     The  Treasury  Department  has  facilitated  transfers of ownership of zero
coupon  securities  by accounting  separately  for the  beneficial  ownership of
particular interest coupon and principal payments on Treasury securities through
the Federal  Reserve  book-entry  record-keeping  system.  The  Federal  Reserve
program as  established  by the  Treasury  Department  is known as  "STRIPS"  or
"Separate  Trading of  Registered  Interest and  Principal of  Securities."  The
Portfolio may purchase  securities  registered in the STRIPS program.  Under the
STRIPS program,  the Portfolio will be able to have its beneficial  ownership of
zero coupon securities recorded directly in the book-entry record-keeping system
in lieu of having to hold  certificates  or other  evidences of ownership of the
underlying  U.S.  Treasury  securities.  The  Portfolio  may acquire  securities
registered under the STRIPS program.

Variable and Floating Rate Instruments

     With  respect to the variable and  floating  rate  instruments  that may be
acquired by the Portfolio as described in the Prospectus, the Investment Adviser
will consider the earning power,  cash flows and other  liquidity  ratios of the
issuers and guarantors of such  instruments  and, if the instruments are subject
to demand  features,  will monitor  their  financial  status and ability to meet
payment on demand.  In  determining  weighted  average  portfolio  maturity,  an
instrument  may,  subject to the Securities and Exchange  Commission (the "SEC")
regulations,  be deemed to have a maturity  shorter  than its  nominal  maturity
based on the period  remaining  until the next interest  rate  adjustment or the
time the  Portfolio  can  recover  payment  of  principal  as  specified  in the
instrument.  Where  necessary  to  ensure  that  a  variable  or  floating  rate
instrument is of the minimum required credit quality, the issuer's obligation to
pay the  principal of the  instrument  will be backed by an  unconditional  bank
letter or line of credit, guarantee or commitment to lend.

     Variable  and  floating  rate  instruments  eligible  for  purchase  by the
Portfolio  include  variable  amount  master  demand  notes,  which  permit  the
indebtedness   thereunder   to  vary  in  addition  to  providing  for  periodic
adjustments  in  the  interest  rate.

     Variable  and  floating  rate  instruments  held by the  Portfolio  will be
subject to the Portfolio's limitation on illiquid investments when the Portfolio
may not demand  payment  of the  principal  amount  within  seven days  absent a
reliable trading market.

Investment Companies

     With respect to the investments of the Portfolio in the securities of other
investment  companies,  such  investments will be limited so that, as determined
after a purchase is made,  either (a) not more than 3% of the total  outstanding
stock of such investment company will be owned by the Portfolio,  the Trust as a
whole and their  affiliated  persons (as defined in the 1940 Act) or (b) (i) not
more than 5% of the value of the total assets of the Portfolio  will be invested
in the securities of any one investment  company;  (ii) not more than 10% of the
value of its total  assets will be invested in the  aggregate in  securities  of
investment  companies as a group;  and (iii) not more than 3% of the outstanding
voting stock of any one investment company will be owned by the Portfolio.

     Certain  investment   companies  whose  securities  are  purchased  by  the
Portfolio may not be obligated to redeem such securities in an amount  exceeding
1% of the investment company's total outstanding securities during any period of
less than 30 days.  Therefore,  such  securities  that exceed this amount may be
illiquid.  Notwithstanding  the  foregoing,  the  Portfolio  may  adhere to more
restrictive  limitations with respect to its investments in securities issued by
other  investment  companies  if required by the SEC or deemed to be in the best
interests of  Investment  Adviser.  If required by the 1940 Act,  the  Portfolio
expects to vote the shares of other investment  companies that are held by it in
the same proportion as the vote of all other holders of such securities.

Yields and Ratings

     The yields on certain  obligations,  including the money market instruments
in which the Portfolio invests, are dependent on a variety of factors, including
general  economic  conditions,  conditions  in the  particular  market  for  the
obligation, financial condition of the issuer, size of the offering, maturity of
the  obligation  and  ratings of the  issue.  The  ratings of  Standard & Poor's
Ratings Group, Inc. ("S&P"), Moody's Investors Service, Inc. ("Moody's"), Duff &
Phelps  Credit  Rating Co.  ("Duff"),  Fitch IBCA,  Inc.  ("Fitch")  and Thomson
BankWatch,  Inc.  represent their  respective  opinions as to the quality of the
obligations they undertake to rate.  Ratings,  however,  are general and are not
absolute standards of quality.  Consequently,  obligations with the same rating,
maturity and interest rate may have different market prices. For a more complete
discussion of ratings, see Appendix A to this Additional Statement.

     Subject to the limitations stated in the Prospectus,  if a security held by
the Portfolio  undergoes a rating  revision,  the Portfolio may continue to hold
the security if the Investment Adviser determine such retention is warranted.

Repurchase Agreements

     The Portfolio may agree to purchase  portfolio  securities  from  financial
institutions  subject to the seller's  agreement to  repurchase  them a mutually
agreed upon date and price ("repurchase agreements").  Repurchase agreements are
considered to be loans under the 1940 Act. Although the securities  subject to a
repurchase agreement may bear maturities exceeding one year,  settlement for the
repurchase  agreement  will  never be more than one year  after the  Portfolio's
acquisition  of the  securities  and normally will be within a shorter period of
time. Securities subject to repurchase agreements are held either by the Trust's
custodian  or  subcustodian  (if  any),  or  in  the  Federal   Reserve/Treasury
Book-Entry System.  The seller under a repurchase  agreement will be required to
maintain  the value of the  securities  subject  to the  agreement  in an amount
exceeding the repurchase  price  (including  accrued  interest).  Default by the
seller would, however,  expose the Portfolio to possible loss because of adverse
market  action or delay in connection  with the  disposition  of the  underlying
obligations.

Reverse Repurchase Agreements

     The Portfolio may borrow funds by selling portfolio securities to financial
institutions such as banks and broker/dealers and agreeing to repurchase them at
a mutually  specified  date and price  ("reverse  repurchase  agreements").  The
Portfolio  may use the  proceeds of reverse  repurchase  agreements  to purchase
other  securities  either maturing,  or under an agreement to resell,  at a date
simultaneous  with  or  prior  to  the  expiration  of  the  reverse  repurchase
agreement.  Reverse  repurchase  agreements are considered to be borrowing under
the 1940 Act.  Reverse  repurchase  agreements  involve the risk that the market
value of the  securities  sold by the Portfolio may decline below the repurchase
price. The Portfolio will pay interest on amounts obtained pursuant to a reverse
repurchase agreement.  While reverse repurchase agreements are outstanding,  the
Portfolio will segregate liquid assets in an amount at least equal to the market
value of the securities, plus accrued interest, subject to the agreement.

Securities Lending

     Collateral  for loans of portfolio  securities  made by the  Portfolio  may
consist of cash, cash  equivalents,  securities issued or guaranteed by the U.S.
Government  or its  agencies  or  irrevocable  bank  letters  of credit  (or any
combination  thereof).  The borrower of securities  will be required to maintain
the market  value of the  collateral  at not less than the  market  value of the
loaned  securities,  and such value will be monitored on a daily basis. When the
Portfolio lends its securities,  it continues to receive  dividends and interest
on the securities loaned and may simultaneously  earn interest on the investment
of the cash collateral.  Although voting rights, or rights to consent, attendant
to securities  on loan pass to the  borrower,  such loans will be called so that
the securities  may be voted by the Portfolio if a material event  affecting the
investment is to occur.

Forward Commitments, When-Issued Securities and Delayed-Delivery Transactions

     The Portfolio may purchase securities on a when-issued basis or purchase or
sell  securities on a forward  commitment  (sometimes  called delayed  delivery)
basis. These  transactions  involve a commitment by the Portfolio to purchase or
sell  securities  at a  future  date.  The  price of the  underlying  securities
(usually  expressed in terms of yield) and the date when the securities  will be
delivered  and  paid  for  (the  settlement  date)  are  fixed  at the  time the
transaction  is  negotiated.   When-issued   purchases  and  forward  commitment
transactions are normally negotiated directly with the other party.

     The Portfolio will purchase  securities on a when-issued  basis or purchase
or sell  securities  on a forward  commitment  basis only with the  intention of
completing the transaction and actually purchasing or selling the securities. If
deemed advisable as a matter of investment strategy,  however, the Portfolio may
dispose of or negotiate a commitment  after entering into it. The Portfolio also
may sell  securities it has committed to purchase  before those  securities  are
delivered to the Portfolio on the  settlement  date. The Portfolio may realize a
capital gain or loss in connection with these transactions.

     When  the  Portfolio  purchases  securities  on a  when-issued  or  forward
commitment  basis,  the Portfolio  will  segregate  liquid assets having a value
(determined  daily) at least  equal to the  amount of the  Portfolio's  purchase
commitments  until three days prior to the settlement  date, or otherwise  cover
its position.  These  procedures  are designed to ensure that the Portfolio will
maintain  sufficient  assets  at  all  times  to  cover  its  obligations  under
when-issued  purchases,  forward commitments and delayed-delivery  transactions.
For purposes of determining the Portfolio's  average  dollar-weighted  maturity,
the maturity of when-issued or forward commitment  securities will be calculated
from the commitment date.

Municipal Instruments

     Opinions  relating to the validity of municipal  instruments and to Federal
and state tax issues relating to these securities are rendered by counsel to the
respective  issuing  authorities  at the time of  issuance.  Such  opinions  may
contain various  assumptions,  qualifications  or exceptions that are reasonably
acceptable to Investment Adviser.  Neither Trust nor the Investment Adviser will
review the proceedings relating to the issuance of municipal  instruments or the
bases for such opinions.

     Municipal  instruments  include both  "general" and "revenue"  obligations.
General obligations are secured by the issuer's pledge of its full faith, credit
and taxing power for the payment of principal and interest.  Revenue obligations
are payable only from the revenues  derived from a particular  facility or class
of facilities  or, in some cases,  from the proceeds of a special  excise tax or
other specific  revenue  source such as lease revenue  payments from the user of
the facility  being  financed.  Industrial  development  bonds are in most cases
revenue  securities  and are not payable from the  unrestricted  revenues of the
issuer.  Consequently,  the credit  quality  of an  industrial  revenue  bond is
usually  directly  related to the credit  standing  of the  private  user of the
facility involved.

     The  Portfolio  may also  invest in  "moral  obligation"  bonds,  which are
normally issued by special purpose public authorities.  If the issuer of a moral
obligation  bond is unable to meet its debt  service  obligations  from  current
revenues,  it may draw on a reserve fund (if such a fund has been  established),
the restoration of which is a moral commitment but not a legal obligation of the
state or municipality which created the issuer.

     Within the principal  classifications  of municipal  instruments  described
above there are a variety of categories,  including  municipal bonds,  municipal
notes,  municipal leases,  custodial  receipts and  participation  certificates.
Municipal  notes  include  tax,  revenue  and bond  anticipation  notes of short
maturity,  generally less than three years, which are issued to obtain temporary
funds  for  various  public  purposes.   Municipal   leases  and   participation
certificates  are  obligations   issued  by  state  and  local   governments  or
authorities   to  finance  the   acquisition   of  equipment   and   facilities.
Participation   certificates   may  represent   participation  in  a  lease,  an
installment  purchase  contract,  or  a  conditional  sales  contract.   Certain
municipal lease obligations (and related participation certificates) may include
"non-appropriation"   clauses  which  provide  that  the   municipality  has  no
obligation  to make lease or  installment  purchase  payments  in futures  years
unless  money is  appropriated  for such  purpose on a yearly  basis.  Custodial
receipts are underwritten by securities  dealers or banks and evidence ownership
of future interest  payments,  principal  payments or both on certain  municipal
securities.  Municipal  leases (and  participations  in such leases) present the
risk that a municipality will not appropriate funds for the lease payments.  The
Investment Adviser, under the supervision of the Trust's Board of Trustees, will
determine  the credit  quality  of any  unrated  municipal  leases on an ongoing
basis,  including an  assessment of the  likelihood  that the leases will not be
cancelled.

     An issuer's obligations under its municipal  instruments are subject to the
provisions of  bankruptcy,  insolvency  and other laws  affecting the rights and
remedies of creditors,  such as the Federal  Bankruptcy  Code, and laws, if any,
which may be enacted by Federal  or state  legislatures  extending  the time for
payment of principal or interest,  or both, or imposing other  constraints  upon
enforcement of such  obligations or upon the ability of  municipalities  to levy
taxes. The power or ability of an issuer to meet its obligations for the payment
of interest on and  principal of its  municipal  instruments  may be  materially
adversely affected by litigation or other conditions.

     From time to time proposals have been  introduced  before  Congress for the
purpose of  restricting  or  eliminating  the Federal  income tax  exemption for
interest on municipal instruments. For example, under the Tax Reform Act of 1986
interest on certain  private  activity  bonds must be included in an  investor's
Federal alternative minimum taxable income, and corporate investors must include
all tax-exempt interest in their Federal alternative minimum taxable income. The
Trust cannot predict what legislation,  if any, may be proposed in the future in
Congress  as regards the  Federal  income tax status of  interest  on  municipal
instruments or which  proposals,  if any, might be enacted.  Such proposals,  if
enacted,  might  materially and adversely  affect the  availability of municipal
instruments for investment by the Portfolio and its liquidity and value. In such
an event the Board of  Trustees  would  reevaluate  the  Portfolio's  investment
objective  and  policies  and  consider  changes in their  structure or possible
dissolution.

     Certain of the municipal  instruments  held by the Portfolio may be insured
as to the timely payment of principal and interest.  The insurance policies will
usually be obtained by the issuer of the Municipal Instrument at the time of its
original  issuance.  In the event that the issuer  defaults  on an  interest  or
principal  payment,  the insurer  will be notified  and will be required to make
payment to the  bondholders.  There is,  however,  no guarantee that the insurer
will meet its obligations.  In addition, such insurance will not protect against
market fluctuations  caused by changes in interest rates and other factors.  The
Portfolio may invest more than 25% of its total assets in municipal  instruments
covered by insurance policies.

     As  described  in the  Prospectus,  the  Portfolio  may invest in municipal
leases,  which may be  considered  liquid under  guidelines  established  by the
Trust's Board of Trustees.  The guidelines will provide for determination of the
liquidity  of a  municipal  lease  obligation  based on  factors  including  the
following:  (1) the frequency of trades and quotes for the  obligation;  (2) the
number of dealers  willing to  purchase or sell the  security  and the number of
other  potential  buyers;  (3) the willingness of dealers to undertake to make a
market in the security; and (4) the nature of the marketplace trades,  including
the time needed to dispose of the security,  the method of soliciting offers and
the mechanics of transfer.  The Investment Adviser, under the supervision of the
Trust's Board of Trustees,  will also consider the continued  marketability of a
municipal lease  obligation based upon an analysis of the general credit quality
of  the  municipality  issuing  the  obligation  and  the  essentiality  to  the
municipality of the property covered by the lease.

Standby Commitments

     The Portfolio may enter into standby  commitments with respect to municipal
instruments held by it. Under a standby commitment,  a dealer agrees to purchase
at the Portfolio's option a specified Municipal Instrument.  Standby commitments
may be  exercisable  by the  Portfolio  at any time  before the  maturity of the
underlying municipal  instruments and may be sold,  transferred or assigned only
with the instruments involved.

     The Portfolio expects that standby  commitments will generally be available
without  the  payment  of any  direct or  indirect  consideration.  However,  if
necessary or advisable,  the Portfolio may pay for a standby  commitment  either
separately in cash or by paying a higher price for municipal  instruments  which
are  acquired  subject to the  commitment  (thus  reducing the yield to maturity
otherwise  available for the same  securities).  The total amount paid in either
manner for outstanding standby commitments held by the Portfolio will not exceed
1/2 of 1% of the value of the Portfolio's  total assets  calculated  immediately
after each standby commitment is acquired.

     The Portfolio intends to enter into standby  commitments only with dealers,
banks and broker-dealers which, in Investment Adviser's opinion, present minimal
credit  risks.  The  Portfolio  will  acquire  standby   commitments  solely  to
facilitate  portfolio  liquidity  and do not  intend to  exercise  their  rights
thereunder for trading  purposes.  The acquisition of a standby  commitment will
not affect the  valuation of the  underlying  Municipal  Instrument.  The actual
standby  commitment  will be valued  at zero in  determining  net  asset  value.
Accordingly,  where the  Portfolio  pays  directly or  indirectly  for a standby
commitment,  its cost will be  reflected  as an  unrealized  loss for the period
during which the  commitment  is held by the  Portfolio and will be reflected in
realized gain or loss when the commitment is exercised or expires.

Illiquid or Restricted Securities

     The Portfolio may purchase commercial paper issued pursuant to Section 4(2)
of the 1933 Act and securities  that are not  registered  under the 1933 Act but
can be sold to "qualified  institutional  buyers" in  accordance  with Rule 144A
under the 1933 Act. These securities will not be considered  illiquid so long as
the Investment  Adviser  determines,  under  guidelines  approved by the Trust's
Board of Trustees,  that an adequate trading market exists.  This practice could
increase the level of illiquidity during any period that qualified institutional
buyers become uninterested in purchasing these securities.

Investment Restrictions

     The  Portfolio  is  subject  to  the  fundamental  investment  restrictions
enumerated  below  which  may be  changed  only  by a vote of the  holders  of a
majority of the Portfolio's outstanding shares.

The Portfolio may not:

     (1) Make  loans,  except (a) through the  purchase of debt  obligations  in
     accordance  with the  Portfolio's  investment  objective and policies,  (b)
     through  repurchase  agreements  with  banks,  brokers,  dealers  and other
     financial institutions, and (c) loans of securities.

     (2)  Mortgage,  pledge or  hypothecate  any assets  (other than pursuant to
     reverse repurchase agreements) except to secure permitted borrowings.

     (3)  Purchase  or sell real  estate  or  securities  issued by real  estate
     investment  trusts,  but this  restriction  shall not prevent the Portfolio
     from investing directly or indirectly in portfolio  instruments  secured by
     real estate or interests therein.

     (4) Purchase or sell  commodities  or commodity  contracts or oil or gas or
     other mineral exploration or development programs.

     (5)  Invest  in  companies  for  the  purpose  of  exercising   control  or
     management.

     (6) Act as underwriter of securities (except as the Portfolio may be deemed
     to be an underwriter  under the  Securities Act of 1933 in connection  with
     the purchase  and sale of  portfolio  instruments  in  accordance  with its
     investment   objective  and  portfolio   management   policies),   purchase
     securities  on  margin   (except  for  delayed   delivery  or   when-issued
     transactions or such short-term  credits as are necessary for the clearance
     of  transactions),  make  short  sales of  securities  or  maintain a short
     position, or write puts, calls or combinations thereof.

     (7) Make any investment inconsistent with the Portfolio's classification as
     a diversified investment company under the 1940 Act.

     (8) Purchase  securities if such purchase  would cause more than 25% in the
     aggregate of the market  value of the total  assets of the  Portfolio to be
     invested in the  securities of one or more issuers  having their  principal
     business  activities  in the  same  industry,  provided  that  there  is no
     limitation with respect to, and the Portfolio  reserves  freedom of action,
     when otherwise consistent with its investment policies,  to concentrate its
     investments in obligations issued or guaranteed by the U.S. Government, its
     agencies or  instrumentalities,  obligations  (other than commercial paper)
     issued or guaranteed by U.S.  banks and U.S.  branches of foreign banks and
     repurchase  agreements and  securities  loans  collateralized  by such U.S.
     Government  obligations or such bank obligations.  For the purposes of this
     restriction,  state  and  municipal  governments  and  their  agencies  and
     authorities are not deemed to be industries;  as to utility companies,  the
     gas,  electric,  water and telephone  businesses  are  considered  separate
     industries;  personal credit finance  companies and business credit finance
     companies are deemed to be separate  industries;  and wholly-owned  finance
     companies are  considered to be in the industries of their parents if their
     activities  are  primarily  related to financing  the  activities  of their
     parents.

     (9) Borrow money (other than pursuant to reverse repurchase  agreements for
     the Portfolio described above), except (a) as a temporary measure, and then
     only in amounts  not  exceeding  5% of the value of the  Portfolio's  total
     assets  or (b)  from  banks,  provided  that  immediately  after  any  such
     borrowing all  borrowings  of the Portfolio do not exceed  one-third of the
     Portfolio's  total  assets.  No  purchases  of  securities  will be made if
     borrowings  subject  to this  restriction  exceed  5% of the  value  of the
     Portfolio's  assets.  The exceptions in (a) and (b) to this restriction are
     not for investment  leverage  purposes but are solely for  extraordinary or
     emergency purposes or to facilitate  management of the Trust's Portfolio by
     enabling the Trust to meet  redemption  requests  when the  liquidation  of
     portfolio  instruments is deemed to be disadvantageous or not possible.  If
     due to  market  fluctuations  or other  reasons  the  total  assets  of the
     Portfolio fall below 300% of its borrowings, the Trust will promptly reduce
     the borrowings of such Portfolio in accordance with the 1940 Act.

     (10)  Notwithstanding  any  of the  Trust's  other  fundamental  investment
     restrictions (including, without limitation, those restrictions relating to
     issuer diversification,  industry concentration and control), the Portfolio
     may (a)  purchase  securities  of other  investment  companies  to the full
     extent  permitted  under  Section  12 of the  1940  Act (or  any  successor
     provision  thereto) or under any  regulation or order of the Securities and
     Exchange Commission;  and (b) invest all or substantially all of its assets
     in  a  single   open-end   investment   company  or  series   thereof  with
     substantially  the same  investment  objective,  policies  and  fundamental
     restrictions as the Portfolio.

                                      * * *

     The freedom of action  reserved in  Restriction  No. 8 with respect to U.S.
branches of foreign banks is subject to the requirement that they are subject to
the same  regulation as domestic  branches of U.S.  banks.  Obligations  of U.S.
branches of foreign banks may include certificates of deposit,  bank and deposit
notes,  bankers'  acceptances and fixed time deposits.  These obligations may be
general  obligations of the parent bank or may be limited to the issuing branch.
Such obligations  will meet the criteria for "Eligible  Securities" as described
in the Prospectus.

     In addition, as a matter of fundamental policy, the Portfolio may not enter
into reverse repurchase  agreements  exceeding in the aggregate one-third of its
total assets.

     Also, as a matter of fundamental policy,  changeable only with the approval
of the  holders of a majority of the  outstanding  shares of the  Portfolio,  at
least 80% of the annual gross income of the Portfolio  will be derived from debt
instruments, the interest on which is, in the opinion of bond counsel or counsel
for issuers,  exempt from regular  Federal income tax,  except in  extraordinary
circumstances   such  as  when  the  Investment  Adviser  believes  that  market
conditions  indicate  that the  Portfolio  should  adopt a  temporary  defensive
posture by holding uninvested cash or investing in taxable securities.  Interest
earned by the Portfolio on "private  activity  bonds" that is treated as an item
of tax preference under the Federal alternative minimum tax will be deemed to be
exempt from regular  Federal income tax for purposes of determining  whether the
Portfolio meets this fundamental policy.

     Securities  held in escrow or  separate  accounts  in  connection  with the
Portfolio's  investment  practices described in this Additional Statement and in
the  Prospectus  are not deemed to be  mortgaged,  pledged or  hypothecated  for
purposes of the foregoing Investment Restrictions.

     Except to the extent  otherwise  provided in Investment  Restriction No. 8,
for the purpose of such restriction in determining  industry  classification the
Trust  intends  to use  the  industry  classification  titles  in  the  Standard
Industrial Classification Manual.

     In applying  Restriction No. 8 above, a security is considered to be issued
by the entity,  or  entities,  whose assets and revenues  back the  security.  A
guarantee of a security is not deemed to be a security  issued by the  guarantor
when the value of all securities  issued and  guaranteed by the  guarantor,  and
owned by the  Portfolio,  does not  exceed  10% of the value of the  Portfolio's
total assets.

     Any restriction which involves a maximum  percentage will not be considered
violated unless an excess over the percentage occurs  immediately  after, and is
caused  by, an  acquisition  or  encumbrance  of  securities  or  assets  of, or
borrowings by, the Portfolio.

     The  Portfolio  intends,  as a  non-fundamental  policy,  to diversify  its
investments  in  accordance  with current SEC  regulations.  Investments  in the
securities of any single issuer (excluding cash, cash items,  certain repurchase
agreements,  U.S.  Government  securities  and  securities  of other  investment
companies)  will be limited to not more than 5% of the value of the  Portfolio's
total assets at the time of purchase,  except that 25% of the value of the total
assets of the Portfolio may be invested in the  securities of any one issuer for
a period of up to three  Business  Days.  A security  that has an  unconditional
guarantee  meeting special SEC  requirements  (a  "Guarantee")  does not need to
satisfy the foregoing issuer  diversification  requirements that would otherwise
apply,  but the Guarantee is instead  subject to the  following  diversification
requirements:  immediately after the acquisition of the security,  the Portfolio
may not have invested more than 10% of its total assets in securities  issued by
or subject to Guarantees  from the same person,  except that the Portfolio  may,
subject  to  certain  conditions,  invest  up to  25%  of its  total  assets  in
securities  issued or subject to Guarantees of the same person.  This percentage
is 100% if the Guarantee is issued by the U.S.  Government or an agency thereof.
In  addition,  the  Portfolio  will limit its  investments  in  certain  conduit
securities  that are not rated in the  highest  short-term  rating  category  as
determined by two nationally  recognized  statistical rating organizations (each
an  "NRSRO")  (or one NRSRO if the  security  is rated by only one NRSRO) or, if
unrated,  are not of comparable  quality to First Tier Securities  ("Second Tier
Securities"), to 5% of its total assets, with investments in any one such issuer
being limited to no more than 1% of the Portfolio's  total assets or $1 million,
whichever  is greater,  measured  at the time of  purchase.  Conduit  securities
subject to this limitation are municipal  instruments  that are not subject to a
Guarantee and involve an arrangement whereunder a person, other than a municipal
issuer, provides for or secures repayment of the security and are not: (i) fully
and  unconditionally  guaranteed by a municipal issuer; or (ii) payable from the
general  revenues of the municipal issuer or other municipal  issuers;  or (iii)
related to a project owned and operated by a municipal  issuer;  or (iv) related
to a facility  leased to and under the control of an  industrial  or  commercial
enterprise  that is part of a public  project  which,  as a whole,  is owned and
under the control of a municipal issuer.

     In  addition  to the  foregoing,  the  Portfolio  is subject to  additional
diversification  requirements  imposed by SEC  regulations on the acquisition of
securities subject to other types of demand features.

                          ADDITIONAL TRUST INFORMATION

TRUSTEES AND OFFICERS

     The business and affairs of the Trust and the  Portfolio  are managed under
the  direction of the Trust's Board of Trustees.  Information  pertaining to the
Trustees and officers of the Trust is set forth below.
<TABLE>
<CAPTION>
<S><C>                          <C>        <C>                  <C>

NAME                                       POSITION(S)           PRINCIPAL OCCUPATION(S)
AND ADDRESS                      AGE       WITH TRUST            DURING PAST 5 YEARS

William H. Springer              69        Chairman              Director of Walgreen Co. (a retail drug
701 Morningside Drive                      and                   store business) since April 1988; Director
Lake Forest, IL 60045                      Trustee               of Baker, Fentress & Co. (a closed-end,
                                                                 non-diversified management investment
                                                                 company) from April 1992 to present; Trustee
                                                                 of Goldman Sachs Trust from 1989 to present.

Richard Gordon Cline             64        Trustee               Chairman and Director of Hussman
4200 Commerce Court,                                             International Inc. (commercial refrigeration
Suite 300                                                        company) since January 1998; Chairman of
Lisle, IL 60532                                                  Hawthorne Inc. (a management advisory
                                                                 services and private investment company)
                                                                 since January 1996; Chairman, President and
                                                                 CEO of NICOR Inc. (a diversified public
                                                                 utility holding company) from 1985 to 1996;
                                                                 Chairman and Director of the Federal Reserve
                                                                 Bank of Chicago from 1992 to 1995; Director
                                                                 of Central DuPage Health System, Pet
                                                                 Incorporated, Whitman Corporation (a
                                                                 diversified holding company), Kmart
                                                                 Corporation (a retailing company), Ryerson
                                                                 Tull, Inc. (a metals distribution company)
                                                                 and University of Illinois Foundation.

Edward J. Condon, Jr.            58        Trustee               Chairman and CEO of The Paradigm Group, Ltd.
Sears Tower, Suite 9650                                          (a financial advisor) since July 1993;
233 S. Wacker Drive                                              within the last five years he has served as
Chicago, IL 60606                                                Vice Chairman and Director of Energenics
                                                                 L.L.C.; Director of Financial Pacific
                                                                 Company; Member of the Board of Managers of
                                                                 The Liberty Hampshire Company, LLC; Member
                                                                 of Advisory Board of Real-Time U.S.A., Inc;
                                                                 Member of the Board of Directors of
                                                                 University Elder Care, Inc; Member of the
                                                                 Board of Directors of the Girl Scouts of
                                                                 Chicago; Member of the Board of Trustees of
                                                                 Dominican University.

John W. English                  66        Trustee               Private Investor since 1993; Vice President
50-H New England Ave.                                            and Chief Investment Officer of The Ford
P.O. Box 640                                                     Foundation (a charitable trust) from 1981
Summit, NJ 07902-0640                                            until 1993; Trustee of The China Fund,
                                                                 Inc., American Red Cross in Greater New
                                                                 York, Mote Marine Laboratory, State Street's
                                                                 Select Sector SPDR Trust, Washington
                                                                 Mutual's WM Funds and United Board for
                                                                 Christian Higher Education in Asia. Director
                                                                 of University of Iowa Foundation,
                                                                 Blanton-Peale Institutes of Religion and
                                                                 Health, Community Foundation of Sarasota
                                                                 County, and Duke Management Company.

Sandra Polk Guthman              55        Trustee               President and CEO of Polk Bros. Foundation
420 N. Wabash Avenue                                             (an Illinois not-for-profit corporation)
Suite 204                                                        from 1993 to present; Director of Business
Chicago, IL 60611                                                Transformation from 1992-1993 and Midwestern
                                                                 Director of Marketing from 1988-1992 for IBM
                                                                 Corporation; Director of MBIA Insurance
                                                                 Corporation of Illinois (bank holding
                                                                 company) since 1994 and Avondale Financial
                                                                 Corporation (a stock savings and loan
                                                                 holding company) since 1995.

Frederick T. Kelsey             71         Trustee               Consultant to Goldman Sachs from December
3133 Laughing Gull Court                                         1985 through February 1988; Director of
Johns Island, SC 29455                                           Goldman Sachs Funds Group and Vice President
                                                                 of Goldman Sachs from May 1981 until his
                                                                 retirement in November 1985; President and
                                                                 Treasurer of the Trust and other investment
                                                                 companies affiliated with Goldman Sachs
                                                                 through August 1985; President from 1983 to
                                                                 1985 and Trustee from 1983 to 1994 of The
                                                                 Centerland Funds and its successor, The
                                                                 Pilot Funds; Trustee of various management
                                                                 investment companies affiliated with Zurich
                                                                 Kemper Investments.

Richard P. Strubel               59        Trustee               Managing Director of Tandem Partners, Inc.
737 N. Michigan Avenue                                           (a privately held management services firm)
Suite 1405                                                       since 1990; President and CEO of Microdot,
Chicago, IL 60611                                                Inc. (a privately held manufacturing firm)
                                                                 from January 1984 to October 1994; Trustee
                                                                 of Goldman Sachs Trust from 1987 to present;
                                                                 Director of Kaynar Technologies Inc. (a
                                                                 leading manufacturer of aircraft fasteners)
                                                                 since March 1997; Trustee of the University
                                                                 of Chicago; Director of Children's Memorial
                                                                 Medical Center.

Jylanne M. Dunne                 39        President             Senior Vice President for Distribution
4400 Computer Drive                                              Services at First Data Investor Services
Westborough, MA 01581                                            Group, Inc. ("FDISG") (since 1988).

Richard H. Rose                  43        Vice                  Vice President and Division Manager of
4400 Computer Drive                        President             Mutual Fund Administration at FDISG (since
Westborough, MA 01581                                            1994); Senior Vice President at The Boston
                                                                 Company Advisors, Inc. (prior thereto).

Brian R. Curran                  31        Treasurer             Director of Fund Administration and
4400 Computer Drive                                              Accounting at FDISG (since 1997); Director
Westborough, MA 01581                                            of Fund Administration at State Street Bank
                                                                 (February 1997 to October 1997); Senior
                                                                 Auditor at Price Waterhouse L.L.P. (February
                                                                 1994 to February 1997); Manager of Fund
                                                                 Accounting at State Street Bank (prior
                                                                 thereto).

Linda J. Hoard                   51        Secretary             Counsel at FDISG (since 1998); Attorney
4400 Computer Drive                                              Consultant for Fidelity Investments,
Westborough, MA 01581                                            Investors Bank & Trust Company and FDISG
                                                                 (September 1994 to June 1998); Vice
                                                                 President and Assistant General Counsel at
                                                                 MFS Investment Management (prior thereto).

Teresa M.R. Hamlin               34        Assistant             Counsel at FDISG (since 1994); Paralegal
4400 Computer Drive                        Secretary             Manager at The Boston Company Advisors, Inc.
Westborough, MA 01581                                            (prior thereto).

Therese Hogan                    36        Assistant             Director of the State Regulation Department
4400 Computer Drive                        Secretary             at FDISG (since 1994); Senior Legal
Westborough, MA 01581                                            Assistant at Palmer and Dodge (prior
                                                                 thereto).
</TABLE>

     None of the Trustees is an "interested  person" under the 1940 Act. Certain
of the  Trustees  and  officers  and  the  organizations  with  which  they  are
associated have had in the past, and may have in the future,  transactions  with
Northern,  FDISG,  First Data  Distributors,  Inc. ("FDDI" and collectively with
FDISG, "First Data") and their respective affiliates. The Trust has been advised
by such  Trustees  and  officers  that all such  transactions  have been and are
expected  to be in the  ordinary  course  of  business  and  the  terms  of such
transactions,  including all loans and loan  commitments  by such persons,  have
been and are expected to be  substantially  the same as the prevailing terms for
comparable transactions for other customers. As a result of the responsibilities
assumed by Northern under its Advisory  Agreement,  Transfer  Agency  Agreement,
Custodian  Agreement and  Co-Administration  Agreement with the Trust,  by FDISG
under its  Co-Administration  Agreement  with the  Trust  and by FDDI  under its
Distribution Agreement with the Trust, the Trust itself requires no employees.

     Each officer  holds  comparable  positions  with certain  other  investment
companies of which First Data or an affiliate thereof is the investment adviser,
administrator and/or distributor.

     Each Trustee  earns a quarterly  retainer of $6,750 and the Chairman of the
Board  earns a  quarterly  retainer  of $10,125.  Each  Trustee,  including  the
Chairman  of the  Board,  earns an  additional  fee of $2,500  for each  meeting
attended, plus reimbursement of expenses incurred as a Trustee.

     In addition,  the Trustees  established  an Audit  Committee  consisting of
three members including a Chairman of the Committee. The Audit Committee members
are Messrs.  Condon,  Kelsey and Strubel (Chairman).  Each member earns a fee of
$2,500 for each meeting attended and the Chairman earns a quarterly  retainer of
$1,500.

     Each Trustee will hold office for an indefinite  term until the earliest of
(1) the  next  meeting  of  shareholders,  if any,  called  for the  purpose  of
considering  the election or  re-election of such Trustee and until the election
and qualification of his or her successor,  if any, elected at such meeting; (2)
the date a Trustee  resigns or retires,  or a Trustee is removed by the Board of
Trustees  or  shareholders,   in  accordance  with  the  Trust's  Agreement  and
Declaration of Trust, or (3) in accordance  with the current  resolutions of the
Board of Trustees (which may be changed without  shareholder  vote), on the last
day of the  fiscal  year of the Trust in which he or she  attains  the age of 72
years.

     The Trust's  officers do not  receive  fees from the Trust for  services in
such capacities,  although FDISG, of which they are also officers, receives fees
from the Trust for administrative services.

     The  following  table sets forth  certain  information  with respect to the
compensation of each Trustee of the Trust for the one-year period ended November
30, 1998:
<TABLE>
<CAPTION>
<S><C>                        <C>                   <C>                            <C>

                              Aggregate             Pension or Retirement           Total Compensation From
                              Compensation          Benefits Accrued as a Part of   Trust Paid
Name of Trustee               from the Trust        Trust's Expenses                to Trustees

William H. Springer           $46,750               N/A                             $46,750
Richard G. Cline              $34,000               N/A                             $34,000
Edward J. Condon, Jr.         $37,000               N/A                             $37,000
John W. English               $32,500               N/A                             $32,500
Sandra Polk Guthman           $34,000               N/A                             $34,000
Frederick T. Kelsey           $37,000               N/A                             $37,000
Richard P. Strubel            $42,250               N/A                             $42,250
</TABLE>

Investment Adviser, Transfer Agent and Custodian

     Northern, a wholly-owned  subsidiary of Northern Trust Corporation,  a bank
holding  company,  is  one  of the  nation's  leading  providers  of  trust  and
investment  management  services.  As of September  30,  1999,  Northern and its
affiliates  had over  $____  billion  in assets  under  management  for  clients
including public and private retirement funds, endowments,  foundations, trusts,
corporations,  and  individuals.  Northern  is  one  of  the  strongest  banking
organizations  in  the  United  States.  Northern  believes  it  has  built  its
organization  by serving  clients with  integrity,  a commitment  to quality and
personal  attention.  Its  stated  mission  with  respect  to all its  financial
products and services is to achieve unrivaled client satisfaction.  With respect
to such clients,  the Trust is designed to assist (i) defined  contribution plan
sponsors and their employees by offering a range of diverse  investment  options
to help comply with 404(c) regulation and may also provide educational  material
to their  employees,  (ii)  employers  who  provide  post-retirement  Employees'
Beneficiary  Associations  ("VEBA") and require  investments that respond to the
impact of Federal  regulations,  (iii)  insurance  companies with the day-to-day
management of uninvested  cash balances as well as with  longer-term  investment
needs, and (iv) charitable and not-for-profit organizations,  such as endowments
and  foundations,  demanding  investment  management  solutions that balance the
requirement  for sufficient  current  income to meet operating  expenses and the
need for capital appreciation to meet future investment objectives.

     Northern  employs  a team  approach  to the  investment  management  of the
Portfolio,  relying upon investment  professionals under the leadership of James
M. Snyder, Chief Investment Officer and Executive Vice President of Northern.

     Under its  Advisory  Agreement  with the  Trust,  Northern,  subject to the
general supervision of the Trust's Board of Trustees,  is responsible for making
investment  decisions for the Portfolio and placing purchase and sale orders for
the  portfolio  transactions  of the  Portfolio.  In connection  with  portfolio
transactions for the Portfolio,  which are generally done at a net price without
a broker's  commission,  Northern's  Advisory  Agreement  provides that Northern
shall attempt to obtain the best net price and execution.

     Northern's investment advisory duties for the Trust are carried out through
its Trust Department. On occasions when Northern deems the purchase or sale of a
security to be in the best interests of the Portfolio as well as other fiduciary
or agency  accounts  managed by it (including  any other  portfolio,  investment
company or account for which Northern acts as adviser),  the Investment Advisory
Agreement provides that Northern, to the extent permitted by applicable laws and
regulations,  may  aggregate  the  securities  to be sold or  purchased  for the
Portfolio with those to be sold or purchased for such other accounts in order to
obtain best net price and execution. In such event, allocation of the securities
so purchased or sold, as well as the expenses incurred in the transaction,  will
be made by  Northern  in the  manner  it  considers  to be  most  equitable  and
consistent  with its fiduciary  obligations  to the Portfolio and other accounts
involved. In some instances, this procedure may adversely affect the size of the
position  obtainable for the Portfolio or the amount of the securities  that are
able to be sold for the  Portfolio.  To the extent that the  execution and price
available from more than one broker or dealer are believed to be comparable, the
Investment Advisory Agreement permits Northern, at its discretion but subject to
applicable  law,  to  select  the  executing  broker  or  dealer on the basis of
Northern's opinion of the reliability and quality of such broker or dealer.

     The Advisory  Agreement  provides that Northern may render similar services
to others so long as its services under such Agreement are not impaired thereby.
The Advisory  Agreement  also  provides that the Trust will  indemnify  Northern
against certain liabilities  (including liabilities under the Federal securities
laws  relating to untrue  statements  or omissions of material  fact and actions
that are in  accordance  with the terms of the  Agreement)  or, in lieu thereof,
contribute to resulting losses.

     Under its Transfer Agency Agreement with the Trust, Northern has undertaken
to (1) answer  customer  inquiries  regarding  the current yield of, and certain
other matters (e.g.  account status  information)  pertaining to, the Trust, (2)
process purchase and redemption  transactions,  including transactions generated
by any service provided outside of the Agreement by Northern,  its affiliates or
correspondent  banks whereby  customer  account cash balances are  automatically
invested in shares of the  Portfolio,  and the  disbursement  of the proceeds of
redemptions,  (3) establish and maintain  separate omnibus accounts with respect
to  shareholders  investing  through  Northern  or  any of  its  affiliates  and
correspondent  banks  and  act as  transfer  agent  and  perform  sub-accounting
services  with respect to each such  account,  (4) provide  periodic  statements
showing account balances,  (5) mail reports and proxy materials to shareholders,
(6) provide  information  in  connection  with the  preparation  by the Trust of
various  regulatory  reports and prepare reports to the Trustees and management,
(7) answer  inquiries  (including  requests for  prospectuses  and statements of
additional  information,  and  assistance  in  the  completion  of  new  account
applications)  from  investors  and  respond  to all  requests  for  information
regarding the Trust (such as current price, recent performance,  and yield data)
and  questions  relating to accounts of  investors  (such as possible  errors in
statements, and transactions), (8) respond to and seek to resolve all complaints
of investors  with  respect to the Trust or their  accounts,  (9) furnish  proxy
statements  and  proxies,  annual  and  semi-annual  financial  statements,  and
dividend,  distribution and tax notices to investors, (10) furnish the Trust all
pertinent Blue Sky information,  (11) perform all required tax withholding, (12)
preserve  records,  and (13) furnish  necessary  office  space,  facilities  and
personnel.  Northern  may  appoint  one  or  more  sub-transfer  agents  in  the
performance of its services.

     As  compensation  for the services  rendered by Northern under the Transfer
Agency  Agreement  with  respect  to the  Shares  described  in this  Additional
Statement  and the  assumption  by  Northern  of related  expenses,  Northern is
entitled to a fee from the Trust,  payable  monthly,  at an annual rate equal to
$18 for each subaccount relating to such Shares of the Portfolio. This fee which
is borne solely by the Shares described in this Additional  Statement and not by
the  Portfolio's  other share classes,  is subject to annual upward  adjustments
based on increases in the Consumer Price Index for All Urban Consumers, provided
that Northern may  permanently  or  temporarily  waive all or any portion of any
upward  adjustment.  Different  transfer agency fees are payable with respect to
the Portfolio's different share classes. Northern's affiliates and correspondent
banks may receive  compensation  for  performing  the services  described in the
preceding paragraph that Northern would otherwise receive.  Conflict-of-interest
restrictions  under state and Federal law  (including  the  Employee  Retirement
Income  Security  Act of 1974) may apply to the  receipt by such  affiliates  or
correspondent  banks of such  compensation  in connection with the investment of
fiduciary funds in Shares of the Portfolio.

     Under  its  Custodian  Agreement  with the  Trust,  Northern  (1) holds the
Portfolio's  cash and  securities,  (2)  maintains  such cash and  securities in
separate  accounts  in the  name  of  the  Portfolio,  (3)  makes  receipts  and
disbursements  of funds on behalf of the Portfolio,  (4) receives,  delivers and
releases  securities on behalf of the  Portfolio,  (5) collects and receives all
income,  principal and other payments in respect of the  Portfolio's  securities
held by Northern under the Custodian Agreement, and (6) maintains the accounting
records of the Trust.  Northern may employ one or more  subcustodians,  provided
that Northern,  subject to certain  monitoring  responsibilities,  shall have no
more  responsibility  or  liability  to the Trust on  account  of any  action or
omission of any subcustodian so employed than such  subcustodian has to Northern
and that the  responsibility  or liability of the subcustodian to Northern shall
conform  to  the  resolution  of  the  Trustees  of the  Trust  authorizing  the
appointment of the particular subcustodian.  Northern may also appoint agents to
carry out such of the provisions of the Custodian Agreement as Northern may from
time to time direct, provided that the appointment of an agent shall not relieve
Northern of any of its responsibilities under the Agreement.

     As  compensation  for the  services  rendered  to the Trust by  Northern as
custodian, and the assumption by Northern of certain related expenses,  Northern
is entitled to payment from the Trust as follows:  (i) $18,000  annually for the
Portfolio, plus (ii) 1/100th of 1% annually of the Portfolio's average daily net
assets to the extent they exceed $100 million, plus (iii) a fixed dollar fee for
each trade in portfolio  securities,  plus (iv) a fixed dollar fee for each time
that  Northern as  custodian  receives  or  transmits  funds via wire,  plus (v)
reimbursement  of expenses  incurred by Northern  as  custodian  for  telephone,
postage, courier fees, office supplies and duplicating.  The fees referred to in
clauses  (iii)  and (iv) are  subject  to  annual  upward  adjustments  based on
increases in the Consumer  Price Index for All Urban  Consumers,  provided  that
Northern may  permanently or temporarily  waive all or any portion of any upward
adjustment.  Northern's  fees  under the  Custodian  Agreement  are  subject  to
reduction based on the Portfolio's daily uninvested cash balances (if any).

     Unless sooner terminated,  each of the Advisory Agreement,  Transfer Agency
Agreement and Custodian  Agreement  between Northern and the Trust will continue
in effect with respect to the Portfolio until April 30, 2000, and thereafter for
successive 12-month periods,  provided that the continuance is approved at least
annually  (1) by the vote of a majority of the  Trustees  who are not parties to
the agreement or "interested  persons" (as such term is defined in the 1940 Act)
of any party  thereto,  cast in person at a meeting  called  for the  purpose of
voting on such  approval and (2) by the Trustees or by the vote of a majority of
the  outstanding  shares  of  the  Portfolio  (as  defined  below  under  "Other
Information").  Each agreement is terminable at any time without  penalty by the
Trust (by specified Trustee or shareholder action) on 60 days' written notice to
Northern and by Northern on 60 days' written notice to the Trust.

     Banking laws and  regulations  currently  prohibit a bank  holding  company
registered  under the Federal  Bank  Holding  Company Act of 1956 or any bank or
non-bank   affiliate  thereof  from  sponsoring,   organizing,   controlling  or
distributing the shares of a registered open-end investment company continuously
engaged in the issuance of its shares,  but such banking laws and regulations do
not prohibit such a holding  company or affiliate or banks generally from acting
as  investment  adviser,  transfer  agent  or  custodian  to such an  investment
company,  or from purchasing  shares of such a company as agent for and upon the
order  of  customers.  Northern  believes  that  it  may  perform  the  services
contemplated by its agreements with the Trust without  violation of such banking
laws or  regulations,  which are applicable to it. It should be noted,  however,
that future changes in either Federal or state statutes and regulations relating
to the permissible activities of banks and their subsidiaries or affiliates,  as
well as future  judicial  or  administrative  decisions  or  interpretations  of
current  and future  statutes  and  regulations,  could  prevent  Northern  from
continuing to perform such services for the Trust.

     Should future  legislative,  judicial or administrative  action prohibit or
restrict the activities of Northern in connection with the provision of services
on behalf of the Trust,  the Trust  might be  required  to alter  materially  or
discontinue its arrangements  with Northern and change its method of operations.
It is not  anticipated,  however,  that any  change  in the  Trust's  method  of
operations would affect the net asset value per share of the Portfolio or result
in a  financial  loss to any  shareholder.  Moreover,  if  current  restrictions
preventing  a  bank  from  legally   sponsoring,   organizing,   controlling  or
distributing  shares of an open-end  investment company were relaxed,  the Trust
expects that  Northern and its  affiliates  would  consider the  possibility  of
offering to perform some or all of the  services now provided by First Data.  It
is not possible, of course, to predict whether or in what form such restrictions
might be relaxed or the terms upon which Northern and its affiliates might offer
to provide services for consideration by the Trustees.

     Northern is active as an  underwriter of municipal  instruments.  Under the
1940 Act,  the  Portfolio  is  precluded,  subject to certain  exceptions,  from
purchasing in the primary  market those  municipal  instruments  with respect to
which  Northern  is  serving  as a  principal  underwriter.  In the  opinion  of
Northern,  this  limitation  will not  significantly  affect the  ability of the
Portfolio to pursue its investment objective.

     Under a Service  Mark  License  Agreement  with the Trust,  Northern  Trust
Corporation has agreed that the name "Northern  Institutional Funds" may be used
in connection with the Trust's business on a royalty-free basis.  Northern Trust
Corporation has reserved to itself the right to grant the non-exclusive right to
use the name "Northern  Institutional  Funds" to any other person. The Agreement
provides  that at such time as the  Agreement is no longer in effect,  the Trust
will cease using the name "Northern Institutional Funds."

Portfolio Transactions

     To the extent that the Portfolio effects brokerage  transactions with First
Data or any broker/dealer  affiliated directly or indirectly with the Investment
Adviser, such transactions,  including the frequency thereof, the receipt of any
commissions payable in connection therewith, and the selection of the affiliated
broker/dealer  effecting such  transactions,  will be fair and reasonable to the
shareholders of the Portfolio.

Co-Administrators and Distributor

     Northern and FDISG, 4400 Computer Drive, Westborough,  Massachusetts 01581,
act as co-administrators  for the Portfolio under a Co-Administration  Agreement
with the Trust.  Subject to the  general  supervision  of the  Trust's  Board of
Trustees,  Northern and FDISG (the  "Co-Administrators")  provide supervision of
all  aspects of the  Trust's  non-investment  advisory  operations  and  perform
various corporate secretarial, treasury and blue sky services, including but not
limited to: (a) maintaining office facilities and furnishing  corporate officers
for the Trust; (b) furnishing data processing services,  clerical services,  and
executive  and  administrative  services  and  standard  stationery  and  office
supplies;  (c) performing all functions  ordinarily performed by the office of a
corporate  treasurer,  and  furnishing  the services and  facilities  ordinarily
incident thereto,  such as expense accrual monitoring and payment of the Trust's
bills, preparing monthly reconciliation of the Trust's expense records, updating
projections of annual expenses,  preparing  materials for review by the Board of
Trustees and compliance  testing;  (d) preparing and  submitting  reports to the
Trust's   shareholders  and  the  SEC;  (e)  preparing  and  printing  financial
statements;  (f) preparing monthly Portfolio profile reports;  (g) preparing and
filing the Trust's  Federal and state tax returns  (other than those required to
be filed by the Trust's custodian and transfer agent) and providing  shareholder
tax  information  to the Trust's  transfer  agent;  (h)  assisting  in marketing
strategy   and  product   development;   (i)   performing   oversight/management
responsibilities,  such as the  supervision  and  coordination of certain of the
Trust's service  providers;  (j) effecting and maintaining,  as the case may be,
the  registration  of shares of the Trust for sale under the securities  laws of
various  jurisdictions;  (k) assisting in maintaining corporate records and good
standing  status of the Trust in its state of  organization;  and (l) monitoring
the Trust's  arrangements  with respect to services provided by Servicing Agents
to  their  customers  who are the  beneficial  owners  of  shares,  pursuant  to
servicing agreements between the Trust and such Servicing Agents.

     Subject to the  limitations  described  below,  as  compensation  for their
administrative   services  and  the   assumption   of  related   expenses,   the
Co-Administrators  are entitled to a fee from the Portfolio,  computed daily and
payable  monthly,  at an annual rate of .10% of the average  daily net assets of
the  Portfolio.  The  Co-Administrators  will  reimburse  the  Portfolio for its
expenses (including  administration fees payable to the  Co-Administrators,  but
excluding advisory fees, transfer agency fees,  servicing fees and extraordinary
expenses) which exceed on an annualized  basis .10% of the  Portfolio's  average
daily net assets.

     Unless sooner terminated, the Co-Administration  Agreement will continue in
effect until April 30, 2001, and  thereafter for successive  one-year terms with
respect to the Portfolio,  provided that the agreement is approved  annually (1)
by the Board of  Trustees  or (2) by the vote of a majority  of the  outstanding
shares of the Portfolio (as defined below under "Other  Information"),  provided
that in either  event the  continuance  is also  approved  by a majority  of the
Trustees who are not parties to the Agreement and who are not interested persons
(as defined in the 1940 Act) of any party  thereto,  by vote cast in person at a
meeting called for the purpose of voting on such approval. The Co-Administration
Agreement is terminable at any time after April 30, 2001, without penalty by the
Trust  on at  least  60  days  written  notice  to the  Co-Administrators.  Each
Co-Administrator may terminate the  Co-Administration  Agreement with respect to
itself at any time  after  April 30,  2001  without  penalty on at least 60 days
written notice to the Trust and the other Co-Administrator.

     The Trust may terminate the Co-Administration  Agreement prior to April 30,
2001 in the event that the Trust or its shareholders  incur damages in excess of
$100,000 as a result of the willful misfeasance,  bad faith or negligence of the
Co-Administrators,   or  the  reckless  disregard  of  their  duties  under  the
Agreement. The Trust may also terminate the Co-Administration Agreement prior to
April 30, 2001 in the event that the  Co-Administrators  fail to meet one of the
performance standards set forth in the Agreement.

     The Trust has entered into a Distribution  Agreement with FDDI, under which
FDDI, as agent,  sells Shares of the Portfolio on a continuous  basis. FDDI pays
the cost of  printing  and  distributing  prospectuses  to  persons  who are not
shareholders  of the Trust  and of sales  presentations,  advertising  and other
distribution  efforts.  No compensation is payable by the Trust to FDDI for such
distribution services.

     The  Co-Administration  Agreement provides that the  Co-Administrators  may
render similar services to others so long as their services under such Agreement
are not impaired thereby. The Co-Administration Agreement also provides that the
Trust will  indemnify  each  Co-Administrator  against all claims  except  those
resulting  from  the  willful  misfeasance,  bad  faith  or  negligence  of such
Co-Administrator,  or the  Co-Administrator's  breach  of  confidentiality.  The
Distribution  Agreement  provides  that the Trust will  indemnify  FDDI  against
certain liabilities  relating to untrue statements or omissions of material fact
except those  resulting from the reliance on information  furnished to the Trust
by  FDDI,  or  those  resulting  from  the  willful  misfeasance,  bad  faith or
negligence of FDDI, or FDDI's breach of confidentiality.  FDDI is a wholly-owned
subsidiary  of  FDISG,  which  is  a  wholly-owned   subsidiary  of  First  Data
Corporation.

Counsel and Auditors

     Drinker  Biddle & Reath LLP,  with  offices at One Logan  Square,  18th and
Cherry Streets,  Philadelphia,  Pennsylvania 19103-6996, serve as counsel to the
Trust.

     Ernst & Young LLP,  independent  auditors,  233 S. Wacker  Drive,  Chicago,
Illinois  60606,  have been  selected as  auditors of the Trust.  In addition to
audit  services,  Ernst & Young LLP reviews  the  Trust's  Federal and state tax
returns,  and provides  consultation  and  assistance  on  accounting,  internal
control and related matters.

In-Kind Purchases and Redemptions

     Payment for Shares of the Portfolio may, in the discretion of Northern,  be
made  in the  form  of  securities  that  are  permissible  investments  for the
Portfolio as described in the  Prospectus.  For further  information  about this
form of payment,  contact  Northern.  In connection  with an in-kind  securities
payment, the Portfolio will require,  among other things, that the securities be
valued on the day of purchase in accordance with the pricing methods used by the
Portfolio and that the Portfolio  receive  satisfactory  assurances that it will
have  good and  marketable  title to the  securities  received  by it;  that the
securities  be in proper form for transfer to the  Portfolio;  and that adequate
information be provided  concerning the basis and other tax matters  relating to
the securities.

     Although the  Portfolio  generally  will redeem Shares in cash, it reserves
the right to pay redemptions by a distribution in-kind of securities (instead of
cash) from the Portfolio.  The securities  distributed  in-kind would be readily
marketable  and would be valued for this purpose using the same method  employed
in  calculating  the  Portfolio's  net asset value per share.  If a  shareholder
receives  redemption  proceeds in-kind,  the shareholder  should expect to incur
transaction  costs  upon  the  disposition  of the  securities  received  in the
redemption.

Third-Party Fees and Requirements

     Shares are sold and  redeemed  without any  purchase or  redemption  charge
imposed by the Trust,  although Northern and other institutions may charge their
customers for services provided in connection with their investments.

     The exercise of voting rights and the delivery to Customers of  shareholder
communications  from  the  Trust  will be  governed  by the  Customers'  account
agreements  with the  Institutions.  Customers  should  read the  Prospectus  in
connection with any relevant  agreement  describing the services  provided by an
Institution and any related requirements and charges, or contact the Institution
at which the Customer maintains its account for further information.

                             PERFORMANCE INFORMATION

     The  performance  of a class of shares of the  Portfolio may be compared to
those of other money market funds with similar  investment  objectives and other
relevant  indices or to  rankings  prepared  by  independent  services  or other
financial or industry publications that monitor the performance of mutual funds.
For  example,  the  performance  of a class of shares  may be  compared  to data
prepared by IBC Financial Data, Inc. or other independent  mutual fund reporting
services.  Performance data as reported in national financial  publications such
as Money Magazine,  Morningstar,  Forbes,  Barron's, The Wall Street Journal and
The New York Times, or in publications of a local or regional  nature,  may also
be used in comparing the performance of a class of shares of the Portfolio.

     From time to time,  the Portfolio  may  advertise  its "yield,"  "effective
yield," "tax-equivalent yield" and "tax-equivalent effective yield." These yield
figures will fluctuate, are based on historical earnings and are not intended to
indicate  future  performance.  "Yield"  refers  to the  net  investment  income
generated by an investment in the Portfolio over a seven-day  period  identified
in the advertisement.  This net investment income is then "annualized." That is,
the amount of net investment income generated by the investment during that week
is assumed  to be  generated  each week over a 52-week  period and is shown as a
percentage of the investment.

     In arriving at quotations as to "yield," the Trust first determines the net
change,  exclusive of capital changes,  during the seven-day period in the value
of a  hypothetical  pre-existing  account  having a balance  of one share at the
beginning  of the  period,  then  divides  such net  change  by the value of the
account at the  beginning  of the period to obtain the base period  return,  and
then multiplies the base period return by 365/7.

     "Effective  yield" is calculated  similarly but, when  annualized,  the net
investment  income  earned by an  investment  in the  Portfolio is assumed to be
reinvested.  The  "effective  yield"  will be  slightly  higher than the "yield"
because of the compounding effect of this assumed  reinvestment.  The "effective
yield" with  respect to the Shares of the  Portfolio  is computed by adding 1 to
the base period return  (calculated as above),  raising the sum to a power equal
to 365 divided by 7, and subtracting 1 from the result.

     The  "tax-equivalent   yield"  demonstrates  the  level  of  taxable  yield
necessary to produce an after-tax yield  equivalent to the Portfolio's  tax-free
yield. It is calculated by taking that portion of the seven-day "yield" which is
tax-exempt and adjusting it to reflect the tax savings  associated with a stated
tax rate.  The  "tax-equivalent  current  yield"  will always be higher than the
Portfolio's yield.

     "Tax-equivalent  yield" is computed by dividing the  tax-exempt  portion of
the yield by 1 minus a stated  income tax rate and then  adding the  quotient to
the  taxable  portion  of the  yield,  if  any.  There  may  be  more  than  one
tax-equivalent yield if more than one stated income tax rate is used.

     The  "tax-equivalent  effective  yield"  demonstrates  the level of taxable
yield  necessary to produce an after-tax  yield  equivalent  to the  Portfolio's
tax-free  effective  yield.  It is  calculated  by taking  that  portion  of the
seven-day  "effective yield" which is tax-exempt and adjusting it to reflect the
tax savings  associated  with a stated tax rate. The  "tax-equivalent  effective
yield" will always be higher than the Portfolio's effective yield.

     "Tax-equivalent  effective  yield" is computed by dividing  the  tax-exempt
portion of the  effective  yield by 1 minus a stated income  tax-rate,  and then
adding the quotient to the taxable portion of the effective yield, if any. There
may be more than one  tax-equivalent  effective  yield,  if more than one stated
income tax rate is used.

     Quotations  of yield,  effective  yield,  tax-equivalent  current yield and
tax-equivalent effective yield provided by the Trust are carried to at least the
nearest hundredth of one percent.  Any fees imposed by Northern,  its affiliates
or  correspondent  banks on their  customers in connection  with  investments in
Shares of the Portfolio are not  reflected in the  calculation  of yields of the
Portfolio.

     The  Portfolio's  yields may not provide a basis for  comparison  with bank
deposits and other  investments  which provide a fixed yield for a stated period
of time.  The  Portfolio's  yields  fluctuate,  unlike  bank  deposits  or other
investments  which  pay  a  fixed  yield  for  a  stated  period  of  time.  The
annualization  of one  week's  income is not  necessarily  indicative  of future
actual yields. Actual yields will depend on such variables as portfolio quality,
average portfolio maturity, the type of portfolio instruments acquired,  changes
in money market interest rates, portfolio expenses and other factors. Yields are
one basis  investors may use to analyze the Portfolio as compared to other money
market  funds and other  investment  vehicles.  However,  yields of other  money
market funds and other investment  vehicles may not be comparable because of the
foregoing  variables,  and  differences  in the  methods  used in valuing  their
portfolio instruments, computing net asset value and determining yield.

     The  Portfolio  may also  quote  from  time to time  its  total  return  in
accordance with SEC regulations.

     The yields and total returns of the Portfolio's  Service Shares and Premier
Shares are calculated  separately  from the  calculations of the yield and total
return of the Shares described in this Additional Statement.

                            AMORTIZED COST VALUATION

     As stated in the  Prospectus,  the Portfolio  seeks to maintain a net asset
value of $1.00 per share and, in this connection,  values its instruments on the
basis of amortized  cost  pursuant to Rule 2a-7 under the 1940 Act.  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,  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 Portfolio would receive if it sold the instrument. During such periods
the yield to investors in the Portfolio  may differ  somewhat from that obtained
in a similar entity which uses available indications as to market value to value
its portfolio instruments. For example, if the use of amortized cost resulted in
a lower (higher)  aggregate  Portfolio  value on a particular day, a prospective
investor  in the  Portfolio  would be able to obtain a somewhat  higher  (lower)
yield and ownership  interest than would result from  investment in such similar
entity and existing  investors would receive less (more)  investment  income and
ownership  interest.   However,  the  Trust  expects  that  the  procedures  and
limitations referred to in the following paragraphs of this section will tend to
minimize the differences referred to above.

     Under Rule 2a-7, the Trust's Board of Trustees,  in supervising the Trust's
operations  and  delegating   special   responsibilities   involving   portfolio
management to Northern,  has established  procedures  that are intended,  taking
into account current market conditions and the Portfolio's investment objective,
to stabilize the net asset value of the Portfolio,  as computed for the purposes
of purchases  and  redemptions,  at $1.00 per share.  The  Trustees'  procedures
include  periodic  monitoring of the difference (the "Market Value  Difference")
between  the  amortized  cost value per share and the net asset  value per share
based upon  available  indications  of market value.  Available  indications  of
market  value  used  by  the  Trust  consist  of  actual  market  quotations  or
appropriate  substitutes which reflect current market conditions and include (a)
quotations  or estimates of market value for  individual  portfolio  instruments
and/or (b) values for  individual  portfolio  instruments  derived  from  market
quotations   relating  to  varying   maturities  of  a  class  of  money  market
instruments.  In the event the Market Value Difference of the Portfolio  exceeds
certain limits or Northern  believes that the Market Value Difference may result
in  material   dilution  or  other  unfair  results  to  investors  or  existing
shareholders, the Trust will take action in accordance with the 1940 Act and the
Trustees  will take  such  steps as they  consider  appropriate  (e.g.,  selling
portfolio  instruments  to  shorten  average  portfolio  maturity  or to realize
capital gains or losses,  reducing or suspending  shareholder  income  accruals,
redeeming  shares  in-kind or  utilizing  a net asset value per share based upon
available  indications of market value which under such circumstances would vary
from $1.00) to  eliminate  or reduce to the extent  reasonably  practicable  any
material dilution or other unfair results to investors or existing  shareholders
which might arise from Market Value Differences.  In particular,  if losses were
sustained by the Portfolio, the number of outstanding shares might be reduced in
order to maintain a net asset value per share of $1.00.  Such reduction would be
effected  by  having  each   shareholder   proportionately   contribute  to  the
Portfolio's  capital the  necessary  shares to restore  such net asset value per
share.  Each shareholder  will be deemed to have agreed to such  contribution in
these circumstances by investing in the Portfolio.

     Rule 2a-7 requires that the Portfolio  limit its investments to instruments
which Northern  determines  (pursuant to guidelines  established by the Board of
Trustees) to present minimal credit risks and which are "Eligible Securities" as
defined by the SEC and described in the Prospectus.  The Rule also requires that
the Portfolio  maintain a dollar-weighted  average portfolio  maturity (not more
than 90 days)  appropriate to its policy of maintaining a stable net asset value
per share and precludes the purchase of any instrument  deemed under the Rule to
have a remaining maturity of more than 397 calendar days. Should the disposition
of a portfolio  security result in a dollar-weighted  average portfolio maturity
of more than 90 days,  the Rule  requires the  Portfolio to invest its available
cash in such a manner as to reduce such maturity to the prescribed limit as soon
as reasonably practicable.

                              DESCRIPTION OF SHARES

     The Trust  Agreement  permits  the  Trust's  Board of  Trustees to issue an
unlimited number of full and fractional shares of beneficial  interest of one or
more  separate  series   representing   interests  in  one  or  more  investment
portfolios.  The Trustees may hereafter create series in addition to the Trust's
nineteen  existing  series,  which represent  interests in the Trust's  nineteen
respective portfolios. The Trust Agreement also permits the Board of Trustees to
classify  or  reclassify  any  unissued  shares  into  classes  within a series.
Pursuant to such  authority,  the Trustees  have  authorized  the issuance of an
unlimited  number of shares of beneficial  interest in three separate classes of
shares of the  Portfolio:  Shares,  Service  Shares  and  Premier  Shares.  This
Additional  Statement (and the related Prospectus) relates only to the Shares of
the Portfolio  discussed  herein.  For information on the other share classes in
the Portfolio and on the Trust's other investment portfolios, call the toll-free
number on page 1.

     Under the terms of the Trust  Agreement,  each  share of the  Portfolio  is
without par value,  represents an equal proportionate  interest in the Portfolio
with each other  share of its class in the  Portfolio  and is  entitled  to such
dividends and  distributions out of the income belonging to the Portfolio as are
declared by the Trustees. Upon the liquidation of the Portfolio, shareholders of
each class of the  Portfolio  are  entitled  to share pro rata in the net assets
belonging  to that  class  available  for  distribution.  Shares do not have any
preemptive or  conversion  rights.  The right of  redemption is described  under
"About Your Account - Selling Shares and Account Policies and Other Information"
in the  Prospectus  and under  "Amortized  Cost  Valuation"  in this  Additional
Statement.  In  addition,  pursuant to the terms of the 1940 Act, the right of a
shareholder  to redeem  shares and the date of payment by the  Portfolio  may be
suspended  for more than seven days (a) for any period during which the New York
Stock  Exchange is closed,  other than the  customary  weekends or holidays,  or
trading  in  the  markets  the  Portfolio  normally  utilizes  is  closed  or is
restricted as determined by the SEC, (b) during any emergency,  as determined by
the SEC, as a result of which it is not reasonably practicable for the Portfolio
to dispose of  instruments  owned by it or fairly to determine  the value of its
net assets,  or (c) for such other period as the SEC may by order permit for the
protection of the  shareholders of the Portfolio.  The Trust may also suspend or
postpone the  recordation  of the transfer of its shares upon the  occurrence of
any of the  foregoing  conditions.  In  addition,  shares of the  Portfolio  are
redeemable at the  unilateral  option of the Trust if the Trustees  determine in
their  sole  discretion  that  failure to so redeem  may have  material  adverse
consequences  to the  shareholders  of the  Portfolio.  Shares  when  issued  as
described in the Prospectus are validly  issued,  fully paid and  nonassessable,
except  as  stated  below.   In  the  interests  of  economy  and   convenience,
certificates representing Shares of the Portfolio are not issued.

     The  proceeds  received  by the  Portfolio  for  each  issue or sale of its
shares, and all net investment income, realized and unrealized gain and proceeds
thereof, subject only to the rights of creditors, will be specifically allocated
to and constitute the underlying assets of the Portfolio.  The underlying assets
of the Portfolio will be segregated on the books of account, and will be charged
with the liabilities  and with a share of the general  liabilities of the Trust.
Expenses with respect to the  Portfolio are normally  allocated in proportion to
the net asset value of the Portfolio except where allocations of direct expenses
can otherwise be fairly made.

     Rule  18f-2  under the 1940 Act  provides  that any matter  required  to be
submitted to the holders of the outstanding  voting  securities of an investment
company  such as the Trust  shall not be deemed to have been  effectively  acted
upon unless approved by the holders of a majority of the  outstanding  shares of
the Portfolio,  if it is affected by the matter.  The Portfolio is affected by a
matter  unless it is clear that the interests of the Portfolio in the matter are
substantially  identical as the other  investment  portfolios or that the matter
does not affect any interest of the  Portfolio.  Under the Rule, the approval of
an  investment  advisory  agreement  or any change in a  fundamental  investment
policy would be  effectively  acted upon with respect to the  Portfolio  only if
approved by a majority of the outstanding shares of the Portfolio.  However, the
Rule also provides  that the  ratification  of the  appointment  of  independent
accountants,  the approval of principal  underwriting contracts and the election
of Trustees are exempt from the separate  voting  requirements  stated above. In
addition, shareholders of each of the classes in the Portfolio have equal voting
rights except that only shares of a particular  class of the  Portfolio  will be
entitled  to vote  on  matters  submitted  to a vote of  shareholders  (if  any)
relating to  shareholder  servicing  expenses and transfer  agency fees that are
payable by that class.

     The Trust is not required to hold annual meetings of shareholders  and does
not intend to hold such meetings. In the event that a meeting of shareholders is
held,  each share of the Trust will be entitled,  as  determined by the Trustees
without the vote or consent of  shareholders,  either to one vote for each share
or to one vote for each dollar of net asset value  represented by such shares on
all matters presented to shareholders,  including the election of Trustees (this
method of voting being referred to as "dollar-based  voting").  However,  to the
extent required by the 1940 Act or otherwise determined by the Trustees,  series
and classes of the Trust will vote separately  from each other.  Shareholders of
the Trust do not have cumulative  voting rights in the election of Trustees and,
accordingly,  the holders of more than 50% of the aggregate  voting power of the
Trust  may  elect  all of the  Trustees  irrespective  of the vote of the  other
shareholders.  Meetings  of  shareholders  of the Trust,  or any series or class
thereof,  may be called by the  Trustees,  certain  officers or upon the written
request  of  holders  of 10% or  more  of the  shares  entitled  to vote at such
meeting. The shareholders of the Trust will have voting rights only with respect
to the limited number of matters specified in the Trust Agreement and such other
matters as the Trustees may  determine or may be required by law. The Trust does
not presently intend to hold annual meetings of shareholders  except as required
by the 1940 Act or other  applicable  law. The  Trustees  will  promptly  call a
meeting  of  shareholders  to vote  upon  the  removal  of any  Trustee  when so
requested  in writing by the  record  holders of 10% or more of the  outstanding
shares.  To the extent  required by law,  the Trust will  assist in  shareholder
communications in connection with such a meeting.

     The Trust Agreement  authorizes the Trustees,  without shareholder approval
(except  as stated in the next  paragraph),  to cause the  Trust,  or any series
thereof,  to merge or consolidate  with any corporation,  association,  trust or
other  organization or sell or exchange all or substantially all of the property
belonging  to the Trust,  or any series  thereof.  In  addition,  the  Trustees,
without shareholder approval, may adopt a "master-feeder" structure by investing
substantially  all of the assets of a series of the Trust in the  securities  of
another open-end investment company or pooled portfolio.

     The Trust  Agreement also  authorizes the Trustees,  in connection with the
merger,  consolidation,  termination or other reorganization of the Trust or any
series or class,  to  classify  the  shareholders  of any class into one or more
separate groups and to provide for the different treatment of shares held by the
different groups, provided that such merger, consolidation, termination or other
reorganization  is approved by a majority of the outstanding  voting  securities
(as  defined  in the  1940  Act) of  each  group  of  shareholders  that  are so
classified.

     The Trust  Agreement  permits  the  Trustees  to amend the Trust  Agreement
without a shareholder vote. However, shareholders of the Trust have the right to
vote on any  amendment:  (i) that would  adversely  affect the voting  rights of
shareholders; (ii) that is required by law to be approved by shareholders; (iii)
that would amend the voting provisions of the Trust Agreement;  or (iv) that the
Trustees determine to submit to shareholders.

     The Trust  Agreement  permits the termination of the Trust or of any series
or class of the  Trust  (i) by a  majority  of the  affected  shareholders  at a
meeting of shareholders of the Trust,  series or class; or (ii) by a majority of
the Trustees without  shareholder  approval if the Trustees  determine that such
action is in the best interest of the Trust or its shareholders. The factors and
events that the  Trustees  may take into  account in making  such  determination
include (i) the  inability  of the Trust or any series or class to maintain  its
assets at an appropriate size; (ii) changes in laws or regulations governing the
Trust or any series or class thereof,  or affecting  assets of the type in which
it  invests;  or (iii)  economic  developments  or trends  having a  significant
adverse impact on their business or operations.

     Under the Delaware  Business Trust Act (the "Delaware  Act"),  shareholders
are not  personally  liable for  obligations  of the  Trust.  The  Delaware  Act
entitles  shareholders  of the Trust to the same  limitation  of liability as is
available  to  shareholders  of private  for-profit  corporations.  However,  no
similar  statutory  or  other  authority  limiting  business  trust  shareholder
liability exists in many other states. As a result, to the extent that the Trust
or a shareholder is subject to the  jurisdiction of courts in such other states,
those  courts may not apply  Delaware  law and may subject the  shareholders  to
liability.  To offset this risk,  the Trust  Agreement  (i)  contains an express
disclaimer of  shareholder  liability for acts or  obligations  of the Trust and
requires that notice of such disclaimer be given in each  agreement,  obligation
and  instrument  entered  into or executed by the Trust or its Trustees and (ii)
provides for indemnification out of the property of the applicable series of the
Trust of any shareholder held personally liable for the obligations of the Trust
solely by reason of being or having  been a  shareholder  and not because of the
shareholder's  acts or omissions or for some other reason.  Thus,  the risk of a
shareholder  incurring  financial loss beyond his or her  investment  because of
shareholder  liability is limited to circumstances in which all of the following
factors  are  present:  (1) a court  refuses  to  apply  Delaware  law;  (2) the
liability  arises  under  tort law or,  if not,  no  contractual  limitation  of
liability is in effect;  and (3) the applicable series of the Trust is unable to
meet its obligations.

     The Trust  Agreement  provides  that the Trustees will not be liable to any
person  other  than the Trust or a  shareholder  and that a Trustee  will not be
liable  for  any act as a  Trustee.  However,  nothing  in the  Trust  Agreement
protects a Trustee  against any liability to which he or she would  otherwise be
subject  by reason of  willful  misfeasance,  bad  faith,  gross  negligence  or
reckless disregard of the duties involved in the conduct of his or her office.

     The Trust Agreement provides for indemnification of Trustees,  officers and
agents of the  Trust  unless  the  recipient  is  liable  by  reason of  willful
misfeasance,  bad faith,  gross  negligence or reckless  disregard of the duties
involved in the conduct of such person's  office.  The Trust Agreement  provides
that  each  shareholder,  by  virtue  of  becoming  such,  will  be held to have
expressly  assented and agreed to the terms of the Trust  Agreement  and to have
become a party thereto.

     In  addition  to the  requirements  of Delaware  law,  the Trust  Agreement
provides that a shareholder of the Trust may bring a derivative action on behalf
of the Trust only if the following conditions are met: (a) shareholders eligible
to bring such derivative  action under Delaware law who hold at least 10% of the
outstanding  shares of the Trust, or 10% of the outstanding shares of the series
or class to which such action relates, must join in the request for the Trustees
to commence  such  action;  and (b) the  Trustees  must be afforded a reasonable
amount of time to consider such shareholder request and to investigate the basis
of such claim. The Trust Agreement also provides that no person,  other than the
Trustees,  who is not a  shareholder  of a  particular  series or class shall be
entitled to bring any derivative  action,  suit or other proceeding on behalf of
or with respect to such series or class. The Trustees will be entitled to retain
counsel or other  advisers  in  considering  the merits of the  request  and may
require an undertaking by the shareholders  making such request to reimburse the
Trust  for the  expense  of any such  advisers  in the event  that the  Trustees
determine not to bring such action.

     The  Trustees  may appoint  separate  Trustees  with respect to one or more
series or classes of the Trust's shares (the "Series  Trustees").  To the extent
provided by the Trustees in the appointment of Series Trustees,  Series Trustees
(a) may,  but are not  required  to, serve as Trustees of the Trust or any other
series  or class of the  Trust;  (b) may  have,  to the  exclusion  of any other
Trustee of the Trust, all the powers and authorities of Trustees under the Trust
Agreement with respect to such series or class;  and/or (c) may have no power or
authority  with  respect  to any other  series or class.  The  Trustees  are not
currently considering the appointment of Series Trustees for the Trust.

     As  of  July  30,  1999,  substantially  all  of  the  Trust's  portfolios'
outstanding  shares  were held of  record by  Northern  for the  benefit  of its
customers and the customers of its affiliates and correspondent  banks that have
invested in the  portfolios.  As of the same date,  Northern  possessed  sole or
shared voting and/or  investment power for its customer accounts with respect to
less  than 10% of the  Trust's  outstanding  shares.  As of the same  date,  the
Trust's Trustees and officers as a group owned  beneficially less than 1% of the
outstanding shares of each class of each portfolio.

                     ADDITIONAL INFORMATION CONCERNING TAXES

General

     The Portfolio will elect to be taxed  separately as a regulated  investment
company (a "RIC"). To qualify as a RIC, the Portfolio  generally must distribute
an amount  equal to at least the sum of 90% of its  investment  company  taxable
income and 90% of its net tax-exempt  interest income (net income and the excess
of net short-term  capital gain over net long-term  capital  loss),  if any, for
each  year  (the   "Distribution   Requirement")   and  satisfy   certain  other
requirements.

     The Portfolio must derive at least 90% of its gross income from  dividends,
interest,  certain  payments with respect to securities loans and gains from the
sale or other disposition of stock or securities or foreign currencies,  or from
other  income  derived  with respect to its business of investing in such stock,
securities  or  currencies.  Also,  at the close of each  quarter of the taxable
year, it is generally required that at least 50% of the value of the Portfolio's
assets  must  consist  of cash  and  cash  items,  U.S.  Government  securities,
securities  of other  RICs and  securities  of other  issuers  (as to which  the
Portfolio  has not  invested  more than 5% of the  value of its total  assets in
securities of such issuer and as to which the Portfolio  does not hold more than
10% of the outstanding  voting securities of such issuer),  and no more than 25%
of the value of the  Portfolio's  total assets may be invested in the securities
of any one issuer (other than U.S. Government securities and securities of other
RICs),  or in two or more issuers  which such  Portfolio  controls and which are
engaged in the same or similar  trades or businesses.  The Portfolio  intends to
comply with these RIC requirements.

     If for any taxable year the  Portfolio  was not to qualify as a RIC, all of
its taxable  income would be subject to tax at regular  corporate  rates without
any  deduction  for   distributions   to   shareholders.   In  such  event,  all
distributions  by the  Portfolio  would be taxable to  shareholders  as ordinary
income to the extent of the  Portfolio's  current and  accumulated  earnings and
profits, and would be eligible for the dividends-received  deduction in the case
of corporate shareholders.

     The Internal  Revenue Code  imposes a  nondeductible  4% excise tax on RICs
that fail  currently to distribute an amount equal to specified  percentages  of
their  ordinary  taxable  income and capital gain net income  (excess of capital
gains  over  capital   losses).   The  Portfolio   intends  to  make  sufficient
distributions or deemed distributions of its ordinary taxable income and capital
gain net income each calendar  year to avoid  liability for this excise tax. The
Portfolio also intends to make sufficient  distributions or deemed distributions
each year to avoid liability for corporate  income tax. If the Portfolio were to
fail to make sufficient  distributions,  it could be liable for corporate income
tax and for excise tax.

     The Trust will be  required in certain  cases to withhold  and remit to the
U.S.  Treasury  31% of taxable  dividends  and gross sale  proceeds  paid to any
shareholder (i) who has provided either an incorrect tax  identification  number
or no number at all, (ii) who is subject to backup  withholding  by the Internal
Revenue  Service  for  failure to report the  receipt  of  taxable  interest  or
dividend income properly,  or (iii) who has failed to certify to the Trust, when
required to do so, that he or she is not subject to backup  withholding  or that
he or she is an "exempt recipient."

Special Tax Considerations

     As  described  in the  Prospectus,  the  Portfolio  is  designed to provide
investors  with  Federally  tax-exempt  interest  income.  The  Portfolio is not
intended to  constitute  a balanced  investment  program and is not designed for
investors seeking capital appreciation or maximum tax-exempt income irrespective
of fluctuations in principal.  Shares of the Portfolio would not be suitable for
tax-exempt  institutions or for retirement  plans qualified under Section 401 of
the Code, H.R. 10 plans and individual  retirement  accounts  because such plans
and  accounts  are  generally  tax-exempt  and,  therefore,  would  not gain any
additional benefit from the Portfolio's dividends being tax-exempt. In addition,
the Portfolio may not be an appropriate  investment for persons or entities that
are  "substantial  users" of facilities  financed by private  activity  bonds or
"related  persons"  thereof.  "Substantial  user" is defined under U.S. Treasury
Regulations to include a non-exempt  person which  regularly uses a part of such
facilities  in its trade or  business  and whose  gross  revenues  derived  with
respect to the facilities  financed by the issuance of bonds are more than 5% of
the total revenues derived by all users of such facilities,  which occupies more
than 5% of the usable area of such  facilities or for which such facilities or a
part thereof were specifically constructed,  reconstructed or acquired. "Related
persons" include certain related natural  persons,  affiliated  corporations,  a
partnership and its partners and an S corporation and its shareholders.

     In order for the Portfolio to pay Federal  exempt-interest  dividends  with
respect to any taxable year,  at the close of each taxable  quarter at least 50%
of the aggregate value of the Portfolio must consist of tax-exempt  obligations.
An  exempt-interest  dividend  is any  dividend  or part  thereof  (other than a
capital  gain   dividend)   paid  by  the   Portfolio   and   designated  as  an
exempt-interest  dividend in a written notice mailed to  shareholders  not later
than 60 days  after the close of the  Portfolio's  taxable  year.  However,  the
aggregate  amount of dividends so designated by the Portfolio  cannot exceed the
excess of the amount of interest  exempt from tax under  Section 103 of the Code
received by the Portfolio during the taxable year over any amounts disallowed as
deductions under Sections 265 and 171(a)(2) of the Code. The percentage of total
dividends paid by the Portfolio with respect to any taxable year which qualifies
as  Federal  exempt-interest  dividends  will be the same  for all  shareholders
receiving dividends from the Portfolio with respect to such year.

     Interest on  indebtedness  incurred by a  shareholder  to purchase or carry
shares of the  Portfolio  generally  is not  deductible  for Federal  income tax
purposes  to  the  extent  attributable  to   exempt-interest-dividends.   If  a
shareholder  holds Portfolio shares for six months or less, any loss on the sale
or exchange of those  shares will be  disallowed  to the extent of the amount of
exempt-interest  dividends  earned  with  respect to the  shares.  The  Treasury
Department,  however, is authorized to issue regulations  reducing the six-month
holding  requirement  to a period of not less than the greater of 31 days or the
period between  regular  distributions  for investment  companies that regularly
distribute at least 90% of its net tax-exempt interest.  No such regulations had
been issued as of the date of this Additional Statement.

     Corporate   taxpayers   will  be   required   to  take  into   account  all
exempt-interest  dividends from the Portfolio in determining certain adjustments
for alternative minimum tax purposes.

     The Portfolio will determine annually the percentages of its net investment
income which is exempt from tax, which  constitute an item of tax preference for
purposes of the Federal alternative minimum tax, and which is fully taxable, and
will apply  these  percentages  uniformly  to all  dividends  declared  from net
investment income during that year. These  percentages may differ  significantly
from the actual percentages for any particular day.

     Shareholders  will  be  advised  annually  as to  the  Federal  income  tax
consequences of distributions made by the Portfolios.

Foreign Investors

     Foreign shareholders generally will be subject to U.S. withholding tax at a
rate of 30% (or a lower treaty rate,  if  applicable)  on  distributions  by the
Portfolio of net investment  income,  other ordinary income,  and the excess, if
any, of net  short-term  capital  gain over net  long-term  capital loss for the
year,  regardless of the extent,  if any, to which the income or gain is derived
from  non-U.S.   investments  of  the  Portfolio.   For  this  purpose,  foreign
shareholders include individuals other than U.S. citizens, residents and certain
nonresident aliens, and foreign corporations,  partnerships, trusts and estates.
Different tax consequences may apply to a foreign  shareholder engaged in a U.S.
trade or business or present in the U.S. for 183 days or more in a year. Foreign
shareholders  should  consult their tax advisers  regarding the U.S. and foreign
tax consequences of investing in the Portfolio.

Conclusion

     The foregoing discussion is based on Federal tax laws and regulations which
are  in  effect  on the  date  of  this  Additional  Statement.  Such  laws  and
regulations may be changed by legislative or  administrative  action. 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 the  Prospectus  is not
intended as a substitute for careful tax planning.  Shareholders  are advised to
consult their tax advisers with specific  reference to their own tax  situation,
including the application of state and local taxes.

     Although  the  Portfolio  expects to qualify as a RIC and to be relieved of
all or  substantially  all  Federal  taxes,  depending  upon the  extent  of its
activities  in states and  localities  in which its offices are  maintained,  in
which its  agents  or  independent  contractors  are  located  or in which it is
otherwise deemed to be conducting business,  the Portfolio may be subject to the
tax laws of such states or localities.


                                OTHER INFORMATION

     The  Prospectus  and  this  Additional  Statement  do not  contain  all the
information included in the Registration  Statement filed with the SEC under the
Securities  Act of 1933 with  respect to the  securities  offered by the Trust's
Prospectus.  Certain  portions of the  Registration  Statement have been omitted
from the  Prospectus  and this  Additional  Statement  pursuant to the rules and
regulations of the SEC. The Registration  Statement including the exhibits filed
therewith may be examined at the office of the SEC in Washington, D.C.

     The Portfolio is responsible for the payment of its expenses. Such expenses
include, without limitation, the fees and expenses payable to Northern and First
Data, brokerage fees and commissions, fees for the registration or qualification
of Portfolio  shares under  Federal or state  securities  laws,  expenses of the
organization of the Portfolio,  taxes,  interest,  costs of liability insurance,
fidelity bonds,  indemnification or contribution,  any costs, expenses or losses
arising out of any  liability of or claim for damages or other  relief  asserted
against the Trust for  violation of any law,  legal,  tax and auditing  fees and
expenses,  expenses  of  preparing  and  printing  prospectuses,  statements  of
additional  information,  proxy materials,  reports and notices and the printing
and  distributing  of  the  same  to the  Trust's  shareholders  and  regulatory
authorities,  compensation  and expenses of its Trustees,  expenses for industry
organizations such as the Investment Company Institute,  miscellaneous  expenses
and extraordinary expenses incurred by the Trust.

     The term  "majority of the  outstanding  shares" of either the Trust or the
Portfolio  means,  with  respect  to  the  approval  of an  investment  advisory
agreement or a change in a fundamental investment  restriction,  the vote of the
lesser of (i) 67% or more of the shares of the Trust or the Portfolio present at
a  meeting,  if the  holders of more than 50% of the  outstanding  shares of the
Trust or the Portfolio are present or  represented  by proxy,  or (ii) more than
50% of the outstanding shares of the Trust or the Portfolio.

     Statements  contained in the prospectus or in this Additional  Statement as
to the  contents  of  any  contract  or  other  documents  referred  to are  not
necessarily complete, and in each instance reference is made to the copy of such
contract or other document filed as an exhibit to the Registration  Statement of
which  the  Prospectus  and this  Additional  Statement  form a part,  each such
statement being qualified in all respects by such reference.

                                   APPENDIX A

COMMERCIAL PAPER RATINGS

     A Standard & Poor's ("S&P") commercial paper rating is a current assessment
of the  likelihood of timely  payment of debt having an original  maturity of no
more than 365 days.  The  following  summarizes  the rating  categories  used by
Standard and Poor's for  commercial  paper that is a permissible  investment for
the Portfolios:

     "A-1" - Obligations are rated in the highest  category  indicating that the
     obligor's  capacity to meet its financial  commitment on the  obligation is
     strong.  Within this category,  certain  obligations  are designated with a
     plus sign (+).  This  indicates  that the  obligor's  capacity  to meet its
     financial commitment on these obligations is extremely strong.

     "A-2" - Obligations are somewhat more susceptible to the adverse effects of
     changes in circumstances and economic conditions than obligations in higher
     rating  categories.  However,  the obligor's capacity to meet its financial
     commitment on the obligation is satisfactory.

     Moody's  commercial paper ratings are opinions of the ability of issuers to
repay  punctually  senior debt  obligations  not having an original  maturity in
excess of one year, unless explicitly noted. The following summarizes the rating
categories used by Moody's for commercial paper that is a permissible investment
for the Portfolios:

     "Prime-1" - Issuers (or supporting  institutions)  have a superior  ability
     for repayment of senior  short-term  debt  obligations.  Prime-1  repayment
     ability will often be evidenced by many of the  following  characteristics:
     leading  market  positions in  well-established  industries;  high rates of
     return  on  funds  employed;  conservative  capitalization  structure  with
     moderate  reliance on debt and ample  asset  protection;  broad  margins in
     earnings  coverage  of  fixed  financial  charges  and high  internal  cash
     generation; and well-established access to a range of financial markets and
     assured sources of alternate liquidity.

     "Prime-2" - Issuers (or supporting  institutions) have a strong ability for
     repayment of senior  short-term  debt  obligations.  This will  normally be
     evidenced  by many  of the  characteristics  cited  above  but to a  lesser
     degree.  Earnings  trends and coverage  ratios,  while  sound,  may be more
     subject  to   variation.   Capitalization   characteristics,   while  still
     appropriate,  may be more affected by external conditions.  Ample alternate
     liquidity is maintained.

     The following  summarizes the rating  categories  used by Duff & Phelps for
commercial paper that is a permissible investment for the Portfolios:

     "D-1+" - Debt possesses the highest certainty of timely payment. Short-term
     liquidity,   including   internal   operating   factors  and/or  access  to
     alternative  sources  of funds,  is  outstanding,  and safety is just below
     risk-free U.S. Treasury short-term obligations.

     "D-1" - Debt  possesses very high  certainty of timely  payment.  Liquidity
     factors are excellent and supported by good fundamental protection factors.
     Risk factors are minor.

     "D-1-" - Debt possesses high certainty of timely payment. Liquidity factors
     are strong and  supported  by good  fundamental  protection  factors.  Risk
     factors are very small.

     "D-2" - Debt possesses good certainty of timely payment.  Liquidity factors
     and company  fundamentals  are sound.  Although  ongoing  funding needs may
     enlarge total  financing  requirements,  access to capital markets is good.
     Risk factors are small.

     Duff & Phelps employs three designations,  "D-1+," "D-1" and "D-1-," within
the highest rating category.

     Fitch IBCA  short-term  ratings  apply to debt  obligations  that have time
horizons of less than 12 months for most  obligations,  or up to three years for
U.S. public finance securities.  The following  summarizes the rating categories
used by Fitch IBCA for short-term  obligations that are permissible  investments
for the Portfolios:

     "F1" - Securities  possess the highest  credit  quality.  This  designation
     indicates   the  strongest   capacity  for  timely   payment  of  financial
     commitments  and may have an added "+" to denote any  exceptionally  strong
     credit feature.

     "F2" - Securities possess good credit quality. This designation indicates a
     satisfactory capacity for timely payment of financial commitments,  but the
     margin of safety is not as great as in the case of the higher ratings.

     Thomson BankWatch  short-term  ratings assess the likelihood of an untimely
payment of principal and interest of debt instruments  with original  maturities
of one year or less.  The  following  summarizes  the  ratings  used by  Thomson
BankWatch for short-term  obligations  that are permissible  investments for the
Portfolios:

     "TBW-1" - This designation  represents Thomson BankWatch's highest category
     and indicates a very high  likelihood  that  principal and interest will be
     paid on a timely basis.

     "TBW-2" - This designation  represents Thomson  BankWatch's second- highest
     category and  indicates  that while the degree of safety  regarding  timely
     repayment of  principal  and  interest is strong,  the  relative  degree of
     safety is not as high as for issues rated "TBW-1."

CORPORATE AND MUNICIPAL LONG-TERM DEBT RATINGS

     The  following  summarizes  the  ratings  used by  Standard  &  Poor's  for
corporate  and  municipal  debt  that  are   permissible   investments  for  the
Portfolios:

     "AAA" - An  obligation  rated  "AAA" has the  highest  rating  assigned  by
     Standard & Poor's. The obligor's capacity to meet its financial  commitment
     on the obligation is extremely strong.

     "AA" - An obligation rated "AA" differs from the highest rated  obligations
     only  in  small  degree.  The  obligor's  capacity  to meet  its  financial
     commitment on the obligation is very strong.

     PLUS (+) OR MINUS (-) - The "AA" rating  classification  may be modified by
the addition of a plus or minus sign to show relative  standing within the major
rating categories.

     "r"  -  This  symbol  is  attached  to  the  ratings  of  instruments  with
significant  noncredit  risks. It highlights risks to principal or volatility of
expected returns which are not addressed in the credit rating. Examples include:
obligations  linked  or  indexed  to  equities,   currencies,   or  commodities;
obligations  exposed  to  severe  prepayment  risk - such  as  interest-only  or
principal-only  mortgage  securities;   and  obligations  with  unusually  risky
interest terms, such as inverse floaters.

     The  following  summarizes  the ratings used by Moody's for  corporate  and
municipal long-term debt that are permissible investments for the Portfolios:

     "Aaa" - Bonds are judged to be of the best quality. They carry the smallest
     degree of investment  risk and are  generally  referred to as "gilt edged."
     Interest  payments are protected by a large or by an  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 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 in "Aaa"  securities or  fluctuation  of
     protective  elements  may be of  greater  amplitude  or there  may be other
     elements  present which make the long-term risk appear somewhat larger than
     the "Aaa" securities.

     Con.  (---) - Bonds for which the security  depends upon the  completion of
some act or the fulfillment of some condition are rated conditionally. These are
bonds secured by (a) earnings of projects  under  construction,  (b) earnings of
projects  unseasoned  in  operating  experience,  (c)  rentals  which begin when
facilities are completed, or (d) payments to which some other limiting condition
attaches.  Parenthetical  rating denotes probable credit stature upon completion
of construction or elimination of basis of condition.

     Note:  Moody's  applies  numerical  modifiers  1,  2,  and 3 in the  rating
classification  "Aa". The modifier 1 indicates that the obligation  ranks in the
higher end of its generic rating category;  the modifier 2 indicates a mid-range
ranking;  and the modifier 3 indicates a ranking in the lower end of its generic
rating category.

     The following  summarizes  the long-term debt ratings used by Duff & Phelps
for corporate and municipal long-term debt that are permissible  investments for
the Portfolios:

     "AAA" - Debt is considered to be of the highest  credit  quality.  The risk
     factors are  negligible,  being only slightly more than for risk-free  U.S.
     Treasury debt.

     "AA" - Debt is considered to be of high credit quality.  Protection factors
     are strong.  Risk is modest but may vary slightly from time to time because
     of economic conditions.

     To provide more detailed  indications of credit  quality,  the "AA" and "A"
ratings may be modified by the  addition of a plus (+) or minus (-) sign to show
relative standing within these major categories.

     The following  summarizes  the ratings used by Fitch IBCA for corporate and
municipal bonds that are permissible investments for the Portfolio:

     "AAA" - Bonds  considered to be investment  grade and of the highest credit
     quality. These ratings denote the lowest expectation of credit risk and 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" - Bonds  considered  to be  investment  grade and of very high  credit
     quality.  These ratings  denote a very low  expectation  of credit risk and
     indicate very strong capacity for timely payment of financial  commitments.
     This capacity is not significantly vulnerable to foreseeable events.

     To provide more  detailed  indications  of credit  quality,  the Fitch IBCA
rating "AA" may be  modified by the  addition of a plus (+) or minus (-) sign to
show relative standing within the major rating category.

     Thomson  BankWatch  assesses  the  likelihood  of an untimely  repayment of
principal or interest  over the term to maturity of long term debt and preferred
stock which are issued by United States commercial  banks,  thrifts and non-bank
banks; non-United States banks; and broker-dealers. The following summarizes the
rating categories used by Thomson BankWatch for long-term debt ratings for those
investments which are permissible investments for the Portfolios:

     "AAA" - This designation  indicates that the ability to repay principal and
     interest on a timely basis is extremely high.

     "AA" - This designation  indicates a very strong ability to repay principal
     and interest on a timely basis,  with limited  incremental risk compared to
     issues rated in the highest category.

     PLUS (+) OR MINUS  (-) The  ratings  "AAA"  and "AA" may  include a plus or
     minus sign designation which indicates where within the respective category
     the issue is placed.

Municipal Note Ratings

     A Standard and Poor's  rating  reflects the  liquidity  concerns and market
access  risks  unique  to notes  due in  three  years  or  less.  The  following
summarizes  the ratings used by Standard & Poor's  Ratings  Group for  municipal
notes that are permissible investments for the Portfolios:

     "SP-1" - The issuers of these  municipal notes exhibit a strong capacity to
     pay principal and interest.  Those issues determined to possess very strong
     characteristics are given a plus (+) designation.

     "SP-2" - The issuers of these municipal notes exhibit satisfactory capacity
     to pay principal and interest, with some vulnerability to adverse financial
     and economic changes over the term of the notes.

     Moody's  ratings for state and municipal notes and other  short-term  loans
are  designated  Moody's  Investment  Grade  ("MIG")  and  variable  rate demand
obligations are designated  Variable  Moody's  Investment  Grade ("VMIG").  Such
ratings recognize the differences  between  short-term credit risk and long-term
risk. The following  summarizes the ratings by Moody's Investors  Service,  Inc.
for short-term notes that are permissible investments for the Portfolios:

     "MIG-1"/"VMIG-1" - This designation, denotes best quality. There is present
     strong protection by established cash flows,  superior liquidity support or
     demonstrated broad-based access to the market for refinancing.

     "MIG-2"/"VMIG-2" - This designation,  denotes high quality, with margins of
     protection that are ample although not so large as in the preceding group.

     Fitch IBCA and Duff & Phelps use the  short-term  ratings  described  under
Commercial  Paper Ratings for municipal notes that are  permissible  investments
for the Portfolios.



                                       PART B

                       STATEMENT OF ADDITIONAL INFORMATION

                                 SERVICE SHARES
                                 PREMIER SHARES

                          NORTHERN INSTITUTIONAL FUNDS

                               MUNICIPAL PORTFOLIO

     This Statement of Additional Information dated October ___ (the "Additional
Statement") is not a prospectus.  Copies of the  prospectus  dated October ____,
1999 for the Service Shares and Premier  Shares of the Municipal  Portfolio (the
"Portfolio") of Northern  Institutional Funds (the "Prospectus") may be obtained
without charge by calling 1-800-637-1380 (toll-free).  The Portfolio also offers
one additional share class,  Shares,  which is described in a separate statement
of additional information. Capitalized terms not otherwise defined have the same
meaning as in the Prospectus.


                                      INDEX

                                                                            Page

ADDITIONAL INVESTMENT INFORMATION.........................................
             Classification and History...................................
             Investment Objective, Strategies and Risks...................
             Investment Restrictions......................................

ADDITIONAL TRUST INFORMATION..............................................
             Trustees and Officers........................................
             Investment Adviser, Transfer Agent and Custodian.............
             Portfolio Transactions.......................................
             Co-Administrators and Distributor............................
             Counsel and Auditors.........................................
             In-Kind Purchases and Redemptions............................
             Third-Party Fees and Requirements............................
PERFORMANCE INFORMATION...................................................

AMORTIZED COST VALUATION..................................................

DESCRIPTION OF SERVICE
SHARES AND PREMIER SHARES.................................................

ADDITIONAL INFORMATION CONCERNING TAXES...................................
             General......................................................
             Foreign Investors............................................
             Conclusion...................................................

SERVICE PLAN..............................................................

OTHER INFORMATION.........................................................

APPENDIX A................................................................

     No  person  has  been  authorized  to give any  information  or to make any
representations not contained in this Additional  Statement or in the Prospectus
in connection with the offering of Service Shares and Premier Shares made by the
Prospectus and, if given or made, such information or  representations  must not
be relied upon as having been  authorized by the Trust or its  distributor.  The
Prospectus does not constitute an offering by the Trust or by the distributor in
any jurisdiction in which such offering may not lawfully be made.

     An  investment  in the  Portfolio  is not a deposit  of any bank and is not
insured or guaranteed by the Federal Deposit Insurance  Corporation or any other
government  agency.  Although the Portfolio  seeks to preserve the value of your
investment at $1.00 per share,  it is possible to lose money by investing in the
Portfolio.

                        ADDITIONAL INVESTMENT INFORMATION

Classification and History

     Northern  Institutional  Funds (the  "Trust")  is an  open-end,  management
investment  company.  The  Portfolio  is  classified  as  diversified  under the
Investment Company Act of 1940, as amended (the "1940 Act").

     The  Portfolio  is a series of the  Trust,  which was  formed as a Delaware
business trust on July 1, 1997 under an Agreement and  Declaration of Trust (the
"Trust  Agreement").   The  Trust  is  the  result  of  a  reorganization  of  a
Massachusetts business trust known as The Benchmark Funds on March 31, 1998. The
Trust's name was changed from The Benchmark Funds to the Northern  Institutional
Funds on July 15,  1998.  The Trust  also  offers six fixed  income,  four money
market, one balanced,  and seven equity  portfolios,  which are not described in
this document.

Investment Objective, Strategies and Risks

     The following supplements the investment objective, strategies and risks of
the Portfolio as set forth in the  Prospectus.  Except as expressly noted below,
the  Portfolio's  investment  objective  and  policies  may be  changed  without
shareholder approval.

Commercial Paper, Bankers' Acceptances, Certificates of Deposit and Time
Deposits

     Commercial paper represents short-term unsecured promissory notes issued in
bearer  form by  banks  or bank  holding  companies,  corporations  and  finance
companies.  Certificates of deposit are negotiable  certificates  issued against
funds deposited in a commercial bank for a definite period of time and earning a
specified  return.  Bankers'  acceptances  are  negotiable  drafts  or  bills of
exchange,  normally  drawn  by an  importer  or  exporter  to pay  for  specific
merchandise,  which are "accepted" by a bank,  meaning, in effect, that the bank
unconditionally  agrees to pay the face  value of the  instrument  on  maturity.
Fixed time deposits are bank  obligations  payable at a stated maturity date and
bearing interest at a fixed rate. Fixed time deposits may be withdrawn on demand
by the  investor,  but may be subject to early  withdrawal  penalties  that vary
depending upon market  conditions and the remaining  maturity of the obligation.
There are no  contractual  restrictions  on the right to  transfer a  beneficial
interest  in a fixed time  deposit  to a third  party.  Bank notes and  bankers'
acceptances  rank junior to deposit  liabilities of the bank and pari passu with
other senior,  unsecured  obligations of the bank.  Bank notes are classified as
"other   borrowings"  on  a  bank's  balance  sheet,  while  deposit  notes  and
certificates  of deposit are classified as deposits.  Bank notes are not insured
by the Federal Deposit Insurance Corporation or any other insurer. Deposit notes
are insured by the Federal Deposit  Insurance  Corporation only to the extent of
$100,000 per depositor per bank.

     The  Portfolio  may invest a portion of its  assets in the  obligations  of
foreign banks and foreign branches of domestic banks.  Such obligations  include
Eurodollar  Certificates of Deposit  ("ECDs") which are U.S.  dollar-denominated
certificates  of deposit issued by offices of foreign and domestic banks located
outside the United States;  Eurodollar  Time Deposits  ("ETDs"),  which are U.S.
dollar-denominated  deposits  in a foreign  branch  of a U.S.  bank or a foreign
bank;  Canadian Time Deposits  ("CTDs"),  which are essentially the same as ETDs
except they are issued by Canadian offices of major Canadian banks; Schedule Bs,
which are obligations  issued by Canadian branches of foreign or domestic banks;
Yankee Certificates of Deposit ("Yankee CDs") which are U.S.  dollar-denominated
certificates  of deposit  issued by a U.S.  branch of a foreign bank and held in
the United States;  and Yankee Bankers'  Acceptances  ("Yankee BAs"),  which are
U.S.  dollar-denominated  bankers'  acceptances  issued  by a U.S.  branch  of a
foreign bank and held in the United States.

Zero Coupon

     To the extent consistent with its investment  objective,  the Portfolio may
invest in zero coupon  bonds.  Zero coupon bonds are debt  securities  issued or
sold at a discount  from their face value and which do not entitle the holder to
any  periodic  payment of interest  prior to maturity or a specified  date.  The
original issue discount varies depending on the time remaining until maturity or
cash payment date,  prevailing interest rates, the liquidity of the security and
perceived credit quality of the issuer.  These securities also may take the form
of debt securities that have been stripped of their unmatured  interest coupons,
the coupons  themselves or receipts or  certificates  representing  interests in
such  stripped  debt  obligations  or coupons.  The market prices of zero coupon
bonds  generally are more  volatile  than the market prices of interest  bearing
securities  and are likely to respond to a greater degree of changes in interest
rates than interest  bearing  securities  having  similar  maturities and credit
quality.

     Zero coupon bonds involve the additional risk that,  unlike securities that
periodically pay interest to maturity,  the Portfolio will realize no cash until
a specified future payment date unless a portion of such securities is sold and,
if the issuer of such securities defaults, the Portfolio may obtain no return at
all on its  investment.  In addition,  even though such securities do no provide
for the  payment of current  interest  in cash,  the  Portfolio  is  nonetheless
required to accrue income on such investment for each taxable year and generally
is required to distribute such accrued amounts (net of deductible  expenses,  if
any) to avoid being subject to tax. Because no cash is generally received at the
time of the accrual,  the Portfolio may be required to liquidate other portfolio
securities  to  obtain  sufficient  cash to  satisfy  Federal  tax  distribution
requirements applicable to the Portfolio.

U.S. Government Obligations

     Examples of the types of U.S.  Government  obligations that may be acquired
by the Portfolio include U.S. Treasury Bills,  Treasury Notes and Treasury Bonds
and the  obligations  of Federal  Home Loan Banks,  Federal  Farm Credit  Banks,
Federal  Land  Banks,   the  Federal   Housing   Administration,   Farmers  Home
Administration,   Export-Import  Bank  of  the  United  States,  Small  Business
Administration,  Federal  National  Mortgage  Association  ("FNMA"),  Government
National Mortgage Association ("GNMA"), General Services Administration, Central
Bank for Cooperatives, Federal Home Loan Mortgage Corporation ("FHLMC"), Federal
Intermediate Credit Banks, and the Maritime Administration.

     Securities  guaranteed as to principal and interest by the U.S. Government,
its agencies or instrumentalities  are also deemed to include (a) securities for
which the payment of principal and interest is backed by an  irrevocable  letter
of  credit  issued  by the U.S.  Government  or any  agency  or  instrumentality
thereof,  and (b)  participations in loans made to foreign  governments or their
agencies that are so guaranteed.

     To the extent consistent with its investment  objective,  the Portfolio may
invest in a variety of U.S.  Treasury  obligations and obligations  issued by or
guaranteed by the U.S. Government or its agencies and instrumentalities. Not all
U.S.  Government  obligations carry the same credit support. No assurance can be
given that the U.S.  Government would provide  financial support to its agencies
or  instrumentalities  if it is  not  obligated  to do so by  law.  There  is no
assurance  that these  commitments  will be  undertaken  or complied with in the
future.  In addition,  the secondary market for certain  participations in loans
made to foreign governments or their agencies may be limited.

Asset-Backed Securities

     To the extent  described  in the  Prospectus,  the  Portfolio  may purchase
asset-backed securities,  which are securities backed by mortgages,  installment
contracts,  credit card  receivables  or other assets.  Asset-backed  securities
represent  interests in "pools" of assets in which payments of both interest and
principal  on the  securities  are made  periodically,  thus in effect  "passing
through"  such  payments  made by the  individual  borrowers  on the assets that
underlie the securities,  net of any fees paid to the issuer or guarantor of the
securities.  The  average  life  of  asset-backed  securities  varies  with  the
maturities  of  the   underlying   instruments,   and  the  average  life  of  a
mortgage-backed  instrument,  in particular,  is likely to be substantially less
than the original  maturity of the mortgage pools underlying the securities as a
result of mortgage  prepayments.  For this and other  reasons,  an  asset-backed
security's stated maturity may be shortened, and the security's total return may
be difficult to predict precisely.

     If an  asset-backed  security is purchased at a premium,  a prepayment rate
that is faster than expected  will reduce yield to maturity,  while a prepayment
rate that is slower than  expected  will have the opposite  effect of increasing
yield to maturity.  Conversely,  if an  asset-backed  security is purchased at a
discount,  faster than expected  prepayments  will  increase,  while slower than
expected prepayments will decrease, yield to maturity.

     Prepayments  on  asset-backed  securities  generally  increase with falling
interest rates and decrease with rising interest rates; furthermore,  prepayment
rates are  influenced by a variety of economic and social  factors.  In general,
the collateral  supporting  non-mortgage  asset-backed  securities is of shorter
maturity  than  mortgage  loans  and is less  likely to  experience  substantial
prepayments.

     Asset-backed   securities   acquired   by   the   Portfolio   may   include
collateralized  mortgage obligations ("CMOs") issued by private companies.  CMOs
provide  the  holder  with a  specified  interest  in the cash flow of a pool of
underlying  mortgages  or  other  mortgage-backed  securities.  Issuers  of CMOs
ordinarily  elect to be  taxed as  pass-through  entities  known as real  estate
mortgage  investment conduits  ("REMICs").  CMOs are issued in multiple classes,
each with a specified fixed or floating  interest rate and a final  distribution
date.  The relative  payment rights of the various CMO classes may be structured
in a variety of ways. The Portfolio will not purchase  "residual" CMO interests,
which normally exhibit greater price volatility.

     There  are a  number  of  important  differences  among  the  agencies  and
instrumentalities of the U.S. Government that issue mortgage-related  securities
and among the securities that they issue. Mortgage-related securities guaranteed
by the GNMA  include  GNMA  Mortgage  Pass-Through  Certificates  (also known as
"Ginnie  Maes"),  which are guaranteed as to the timely payment of principal and
interest  by GNMA and backed by the full faith and credit of the United  States.
GNMA is a  wholly-owned  U.S.  Government  corporation  within the Department of
Housing and Urban  Development.  GNMA  certificates  also are  supported  by the
authority of GNMA to borrow funds from the U.S.  Treasury to make payments under
its guarantee. Mortgage-backed securities issued by FNMA include FNMA Guaranteed
Mortgage  Pass-Through  Certificates  (also known as "Fannie  Maes"),  which are
solely the  obligations  of FNMA and are not backed by or entitled to full faith
and credit of the United States, but are supported by the right of the issuer to
borrow from the  Treasury.  FNMA is a  government-sponsored  organization  owned
entirely  by  private  stockholders.  Fannie  Maes are  guaranteed  as to timely
payment of the  principal  and  interest  by FNMA.  Mortgage-related  securities
issued by the FHLMC  include FHLMC  Mortgage  Participation  Certificates  (also
known as "Freddie Macs" or "Pcs").  FHLMC is a corporate  instrumentality of the
United States,  created pursuant to an Act of Congress,  which is owned entirely
by  Federal  Home  Loan  Banks.  Freddie  Macs  are  not  guaranteed  and do not
constitute a debt or obligation of the United States or of any Federal Home Loan
Bank.  Freddie Macs entitle the holder to timely  payment of interest,  which is
guaranteed  by FHLMC.  FHLMC  guarantees  either  ultimate  collection or timely
payment of all principal  payments on the underlying  mortgage loans. When FHLMC
does not guarantee  timely payment of principal,  FHLMC may remit the amount due
on account of its  guarantee of ultimate  payment of principal at any time after
default on an underlying mortgage,  but in no event later than one year after it
becomes payable.

     Non-mortgage  asset-backed  securities  involve  certain risks that are not
presented by mortgage-backed securities. Primarily, these securities do not have
the benefit of the same security interest in the underlying  collateral.  Credit
card  receivables  are  generally  unsecured and the debtors are entitled to the
protection of a number of state and Federal  consumer credit laws, many of which
have  given  debtors  the right to set off  certain  amounts  owed on the credit
cards, thereby reducing the balance due. Most issuers of automobile  receivables
permit the servicers to retain possession of the underlying obligations.  If the
servicer were to sell these  obligations to another party,  there is a risk that
the purchaser  would acquire an interest  superior to that of the holders of the
related  automobile  receivables.  In  addition,  because of the large number of
vehicles involved in a typical issuance and technical  requirements  under state
laws, the trustee for the holders of the automobile  receivables may not have an
effective security interest in all of the obligations  backing such receivables.
Therefore,  there is a possibility that recoveries on repossessed collateral may
not, in some cases, be able to support payments on these securities.

Supranational Bank Obligations

     The  Portfolio  may  invest  in   obligations   of   supranational   banks.
Supranational banks are international banking institutions designed or supported
by national governments to promote economic reconstruction, development or trade
among nations (e.g., the International Bank for Reconstruction and Development).
Obligations of  supranational  banks may be supported by appropriated but unpaid
commitments  of their  member  countries  and there is no  assurance  that these
commitments will be undertaken or met in the future.

Custodial Receipts for Treasury Securities

     The Portfolio may acquire U.S.  Government  obligations and their unmatured
interest  coupons  that  have  been  separated  ("stripped")  by  their  holder,
typically a custodian bank or investment  brokerage firm.  Having  separated the
interest  coupons  from  the  underlying   principal  of  the  U.S.   Government
obligations, the holder will resell the stripped securities in custodial receipt
programs with a number of different  names,  including  "Treasury  Income Growth
Receipts"  ("TIGRs")  and  "Certificate  of  Accrual  on  Treasury   Securities"
("CATS").   The  stripped  coupons  are  sold  separately  from  the  underlying
principal,  which is usually sold at a deep discount  because the buyer receives
only the right to receive a future  fixed  payment on the  security and does not
receive any rights to periodic  interest  (cash)  payments.  The underlying U.S.
Treasury bonds and notes  themselves are held in book-entry  form at the Federal
Reserve Bank or, in the case of bearer securities (i.e., unregistered securities
which are ostensibly  owned by the bearer or holder),  in trust on behalf of the
owners.  Counsel to the underwriters of these certificates or other evidences of
ownership  of U.S.  Treasury  securities  have  state  that,  in their  opinion,
purchasers of the stripped  securities most likely will be deemed the beneficial
holders of the underlying U.S. Government  obligations for Federal tax purposes.
The Trust is unaware of any  binding  legislative,  judicial  or  administrative
authority on this issue.

U.S. Treasury STRIPS

     The  Treasury  Department  has  facilitated  transfers of ownership of zero
coupon  securities  by accounting  separately  for the  beneficial  ownership of
particular interest coupon and principal payments on Treasury securities through
the Federal  Reserve  book-entry  record-keeping  system.  The  Federal  Reserve
program as  established  by the  Treasury  Department  is known as  "STRIPS"  or
"Separate  Trading of  Registered  Interest and  Principal of  Securities."  The
Portfolio may purchase  securities  registered in the STRIPS program.  Under the
STRIPS program,  the Portfolio will be able to have its beneficial  ownership of
zero coupon securities recorded directly in the book-entry record-keeping system
in lieu of having to hold  certificates  or other  evidences of ownership of the
underlying  U.S.  Treasury  securities.  The  Portfolio  may acquire  securities
registered under the STRIPS program.

Variable and Floating Rate Instruments

     With  respect to the variable and  floating  rate  instruments  that may be
acquired by the Portfolio as described in the Prospectus, the Investment Adviser
will consider the earning power,  cash flows and other  liquidity  ratios of the
issuers and guarantors of such  instruments  and, if the instruments are subject
to demand  features,  will monitor  their  financial  status and ability to meet
payment on demand.  In  determining  weighted  average  portfolio  maturity,  an
instrument  may,  subject to the Securities and Exchange  Commission (the "SEC")
regulations,  be deemed to have a maturity  shorter  than its  nominal  maturity
based on the period  remaining  until the next interest  rate  adjustment or the
time the  Portfolio  can  recover  payment  of  principal  as  specified  in the
instrument.  Where  necessary  to  ensure  that  a  variable  or  floating  rate
instrument is of the minimum required credit quality, the issuer's obligation to
pay the  principal of the  instrument  will be backed by an  unconditional  bank
letter or line of credit, guarantee or commitment to lend.

     Variable  and  floating  rate  instruments  eligible  for  purchase  by the
Portfolio  include  variable  amount  master  demand  notes,  which  permit  the
indebtedness   thereunder   to  vary  in  addition  to  providing  for  periodic
adjustments in the interest rate.

     Variable  and  floating  rate  instruments  held by the  Portfolio  will be
subject to the Portfolio's limitation on illiquid investments when the Portfolio
may not demand  payment  of the  principal  amount  within  seven days  absent a
reliable trading market.

Investment Companies

     With respect to the investments of the Portfolio in the securities of other
investment  companies,  such  investments will be limited so that, as determined
after a purchase is made,  either (a) not more than 3% of the total  outstanding
stock of such investment company will be owned by the Portfolio,  the Trust as a
whole and their  affiliated  persons (as defined in the 1940 Act) or (b) (i) not
more than 5% of the value of the total assets of the Portfolio  will be invested
in the securities of any one investment  company;  (ii) not more than 10% of the
value of its total  assets will be invested in the  aggregate in  securities  of
investment  companies as a group;  and (iii) not more than 3% of the outstanding
voting stock of any one investment company will be owned by the Portfolio.

     Certain  investment   companies  whose  securities  are  purchased  by  the
Portfolio may not be obligated to redeem such securities in an amount  exceeding
1% of the investment company's total outstanding securities during any period of
less than 30 days.  Therefore,  such  securities  that exceed this amount may be
illiquid.  Notwithstanding  the  foregoing,  the  Portfolio  may  adhere to more
restrictive  limitations with respect to its investments in securities issued by
other  investment  companies  if required by the SEC or deemed to be in the best
interests of  Investment  Adviser.  If required by the 1940 Act,  the  Portfolio
expects to vote the shares of other investment  companies that are held by it in
the same proportion as the vote of all other holders of such securities.

Yields and Ratings

     The yields on certain  obligations,  including the money market instruments
in which the Portfolio invests, are dependent on a variety of factors, including
general  economic  conditions,  conditions  in the  particular  market  for  the
obligation, financial condition of the issuer, size of the offering, maturity of
the  obligation  and  ratings of the  issue.  The  ratings of  Standard & Poor's
Ratings Group, Inc. ("S&P"), Moody's Investors Service, Inc. ("Moody's"), Duff &
Phelps  Credit  Rating Co.  ("Duff"),  Fitch IBCA,  Inc.  ("Fitch")  and Thomson
BankWatch,  Inc.  represent their  respective  opinions as to the quality of the
obligations they undertake to rate.  Ratings,  however,  are general and are not
absolute standards of quality.  Consequently,  obligations with the same rating,
maturity and interest rate may have different market prices. For a more complete
discussion of ratings, see Appendix A to this Additional Statement.

     Subject to the limitations stated in the Prospectus,  if a security held by
the Portfolio  undergoes a rating  revision,  the Portfolio may continue to hold
the security if the Investment Adviser determine such retention is warranted.

Repurchase Agreements

     The Portfolio may agree to purchase  portfolio  securities  from  financial
institutions  subject to the seller's  agreement to  repurchase  them a mutually
agreed upon date and price ("repurchase agreements").  Repurchase agreements are
considered to be loans under the 1940 Act. Although the securities  subject to a
repurchase agreement may bear maturities exceeding one year,  settlement for the
repurchase  agreement  will  never be more than one year  after the  Portfolio's
acquisition  of the  securities  and normally will be within a shorter period of
time. Securities subject to repurchase agreements are held either by the Trust's
custodian  or  subcustodian  (if  any),  or  in  the  Federal   Reserve/Treasury
Book-Entry System.  The seller under a repurchase  agreement will be required to
maintain  the value of the  securities  subject  to the  agreement  in an amount
exceeding the repurchase  price  (including  accrued  interest).  Default by the
seller would, however,  expose the Portfolio to possible loss because of adverse
market  action or delay in connection  with the  disposition  of the  underlying
obligations.

Reverse Repurchase Agreements

     The Portfolio may borrow funds by selling portfolio securities to financial
institutions such as banks and broker/dealers and agreeing to repurchase them at
a mutually  specified  date and price  ("reverse  repurchase  agreements").  The
Portfolio  may use the  proceeds of reverse  repurchase  agreements  to purchase
other  securities  either maturing,  or under an agreement to resell,  at a date
simultaneous  with  or  prior  to  the  expiration  of  the  reverse  repurchase
agreement.  Reverse  repurchase  agreements are considered to be borrowing under
the 1940 Act.  Reverse  repurchase  agreements  involve the risk that the market
value of the  securities  sold by the Portfolio may decline below the repurchase
price. The Portfolio will pay interest on amounts obtained pursuant to a reverse
repurchase agreement.  While reverse repurchase agreements are outstanding,  the
Portfolio will segregate liquid assets in an amount at least equal to the market
value of the securities, plus accrued interest, subject to the agreement.

Securities Lending

     Collateral  for loans of portfolio  securities  made by the  Portfolio  may
consist of cash, cash  equivalents,  securities issued or guaranteed by the U.S.
Government  or its  agencies  or  irrevocable  bank  letters  of credit  (or any
combination  thereof).  The borrower of securities  will be required to maintain
the market  value of the  collateral  at not less than the  market  value of the
loaned  securities,  and such value will be monitored on a daily basis. When the
Portfolio lends its securities,  it continues to receive  dividends and interest
on the securities loaned and may simultaneously  earn interest on the investment
of the cash collateral.  Although voting rights, or rights to consent, attendant
to securities  on loan pass to the  borrower,  such loans will be called so that
the securities  may be voted by the Portfolio if a material event  affecting the
investment is to occur.

Forward Commitments, When-Issued Securities and Delayed-Delivery Transactions

     The Portfolio may purchase securities on a when-issued basis or purchase or
sell  securities on a forward  commitment  (sometimes  called delayed  delivery)
basis. These  transactions  involve a commitment by the Portfolio to purchase or
sell  securities  at a  future  date.  The  price of the  underlying  securities
(usually  expressed in terms of yield) and the date when the securities  will be
delivered  and  paid  for  (the  settlement  date)  are  fixed  at the  time the
transaction  is  negotiated.   When-issued   purchases  and  forward  commitment
transactions are normally negotiated directly with the other party.

     The Portfolio will purchase  securities on a when-issued  basis or purchase
or sell  securities  on a forward  commitment  basis only with the  intention of
completing the transaction and actually purchasing or selling the securities. If
deemed advisable as a matter of investment strategy,  however, the Portfolio may
dispose of or negotiate a commitment  after entering into it. The Portfolio also
may sell  securities it has committed to purchase  before those  securities  are
delivered to the Portfolio on the  settlement  date. The Portfolio may realize a
capital gain or loss in connection with these transactions.

     When  the  Portfolio  purchases  securities  on a  when-issued  or  forward
commitment  basis,  the Portfolio  will  segregate  liquid assets having a value
(determined  daily) at least  equal to the  amount of the  Portfolio's  purchase
commitments  until three days prior to the settlement  date, or otherwise  cover
its position.  These  procedures  are designed to ensure that the Portfolio will
maintain  sufficient  assets  at  all  times  to  cover  its  obligations  under
when-issued  purchases,  forward commitments and delayed-delivery  transactions.
For purposes of determining the Portfolio's  average  dollar-weighted  maturity,
the maturity of when-issued or forward commitment  securities will be calculated
from the commitment date.

Municipal Instruments

     Opinions  relating to the validity of municipal  instruments and to Federal
and state tax issues relating to these securities are rendered by counsel to the
respective  issuing  authorities  at the time of  issuance.  Such  opinions  may
contain various  assumptions,  qualifications  or exceptions that are reasonably
acceptable to Investment Adviser.  Neither Trust nor the Investment Adviser will
review the proceedings relating to the issuance of municipal  instruments or the
bases for such opinions.

     Municipal  instruments  include both  "general" and "revenue"  obligations.
General obligations are secured by the issuer's pledge of its full faith, credit
and taxing power for the payment of principal and interest.  Revenue obligations
are payable only from the revenues  derived from a particular  facility or class
of facilities  or, in some cases,  from the proceeds of a special  excise tax or
other specific  revenue  source such as lease revenue  payments from the user of
the facility  being  financed.  Industrial  development  bonds are in most cases
revenue  securities  and are not payable from the  unrestricted  revenues of the
issuer.  Consequently,  the credit  quality  of an  industrial  revenue  bond is
usually  directly  related to the credit  standing  of the  private  user of the
facility involved.

     The  Portfolio  may also  invest in  "moral  obligation"  bonds,  which are
normally issued by special purpose public authorities.  If the issuer of a moral
obligation  bond is unable to meet its debt  service  obligations  from  current
revenues,  it may draw on a reserve fund (if such a fund has been  established),
the restoration of which is a moral commitment but not a legal obligation of the
state or municipality which created the issuer.

     Within the principal  classifications  of municipal  instruments  described
above there are a variety of categories,  including  municipal bonds,  municipal
notes,  municipal leases,  custodial  receipts and  participation  certificates.
Municipal  notes  include  tax,  revenue  and bond  anticipation  notes of short
maturity,  generally less than three years, which are issued to obtain temporary
funds  for  various  public  purposes.   Municipal   leases  and   participation
certificates  are  obligations   issued  by  state  and  local   governments  or
authorities   to  finance  the   acquisition   of  equipment   and   facilities.
Participation   certificates   may  represent   participation  in  a  lease,  an
installment  purchase  contract,  or  a  conditional  sales  contract.   Certain
municipal lease obligations (and related participation certificates) may include
"non-appropriation"   clauses  which  provide  that  the   municipality  has  no
obligation  to make lease or  installment  purchase  payments  in futures  years
unless  money is  appropriated  for such  purpose on a yearly  basis.  Custodial
receipts are underwritten by securities  dealers or banks and evidence ownership
of future interest  payments,  principal  payments or both on certain  municipal
securities.  Municipal  leases (and  participations  in such leases) present the
risk that a municipality will not appropriate funds for the lease payments.  The
Investment Adviser, under the supervision of the Trust's Board of Trustees, will
determine  the credit  quality  of any  unrated  municipal  leases on an ongoing
basis,  including an  assessment of the  likelihood  that the leases will not be
cancelled.

     An issuer's obligations under its municipal  instruments are subject to the
provisions of  bankruptcy,  insolvency  and other laws  affecting the rights and
remedies of creditors,  such as the Federal  Bankruptcy  Code, and laws, if any,
which may be enacted by Federal  or state  legislatures  extending  the time for
payment of principal or interest,  or both, or imposing other  constraints  upon
enforcement of such  obligations or upon the ability of  municipalities  to levy
taxes. The power or ability of an issuer to meet its obligations for the payment
of interest on and  principal of its  municipal  instruments  may be  materially
adversely affected by litigation or other conditions.

     From time to time proposals have been  introduced  before  Congress for the
purpose of  restricting  or  eliminating  the Federal  income tax  exemption for
interest on municipal instruments. For example, under the Tax Reform Act of 1986
interest on certain  private  activity  bonds must be included in an  investor's
Federal alternative minimum taxable income, and corporate investors must include
all tax-exempt interest in their Federal alternative minimum taxable income. The
Trust cannot predict what legislation,  if any, may be proposed in the future in
Congress  as regards the  Federal  income tax status of  interest  on  municipal
instruments or which  proposals,  if any, might be enacted.  Such proposals,  if
enacted,  might  materially and adversely  affect the  availability of municipal
instruments for investment by the Portfolio and its liquidity and value. In such
an event the Board of  Trustees  would  reevaluate  the  Portfolio's  investment
objective  and  policies  and  consider  changes in their  structure or possible
dissolution.

     Certain of the municipal  instruments  held by the Portfolio may be insured
as to the timely payment of principal and interest.  The insurance policies will
usually be obtained by the issuer of the Municipal Instrument at the time of its
original  issuance.  In the event that the issuer  defaults  on an  interest  or
principal  payment,  the insurer  will be notified  and will be required to make
payment to the  bondholders.  There is,  however,  no guarantee that the insurer
will meet its obligations.  In addition, such insurance will not protect against
market fluctuations  caused by changes in interest rates and other factors.  The
Portfolio may invest more than 25% of its total assets in municipal  instruments
covered by insurance policies.

     As  described  in the  Prospectus,  the  Portfolio  may invest in municipal
leases,  which may be  considered  liquid under  guidelines  established  by the
Trust's Board of Trustees.  The guidelines will provide for determination of the
liquidity  of a  municipal  lease  obligation  based on  factors  including  the
following:  (1) the frequency of trades and quotes for the  obligation;  (2) the
number of dealers  willing to  purchase or sell the  security  and the number of
other  potential  buyers;  (3) the willingness of dealers to undertake to make a
market in the security; and (4) the nature of the marketplace trades,  including
the time needed to dispose of the security,  the method of soliciting offers and
the mechanics of transfer.  The Investment Adviser, under the supervision of the
Trust's Board of Trustees,  will also consider the continued  marketability of a
municipal lease  obligation based upon an analysis of the general credit quality
of  the  municipality  issuing  the  obligation  and  the  essentiality  to  the
municipality of the property covered by the lease.

Standby Commitments

     The Portfolio may enter into standby  commitments with respect to municipal
instruments held by it. Under a standby commitment,  a dealer agrees to purchase
at the Portfolio's option a specified Municipal Instrument.  Standby commitments
may be  exercisable  by the  Portfolio  at any time  before the  maturity of the
underlying municipal  instruments and may be sold,  transferred or assigned only
with the instruments involved.

     The Portfolio expects that standby  commitments will generally be available
without  the  payment  of any  direct or  indirect  consideration.  However,  if
necessary or advisable,  the Portfolio may pay for a standby  commitment  either
separately in cash or by paying a higher price for municipal  instruments  which
are  acquired  subject to the  commitment  (thus  reducing the yield to maturity
otherwise  available for the same  securities).  The total amount paid in either
manner for outstanding standby commitments held by the Portfolio will not exceed
1/2 of 1% of the value of the Portfolio's  total assets  calculated  immediately
after each standby commitment is acquired.

     The Portfolio intends to enter into standby  commitments only with dealers,
banks and broker-dealers which, in Investment Adviser's opinion, present minimal
credit  risks.  The  Portfolio  will  acquire  standby   commitments  solely  to
facilitate  portfolio  liquidity  and do not  intend to  exercise  their  rights
thereunder for trading  purposes.  The acquisition of a standby  commitment will
not affect the  valuation of the  underlying  Municipal  Instrument.  The actual
standby  commitment  will be valued  at zero in  determining  net  asset  value.
Accordingly,  where the  Portfolio  pays  directly or  indirectly  for a standby
commitment,  its cost will be  reflected  as an  unrealized  loss for the period
during which the  commitment  is held by the  Portfolio and will be reflected in
realized gain or loss when the commitment is exercised or expires.

Illiquid or Restricted Securities

     The Portfolio may purchase commercial paper issued pursuant to Section 4(2)
of the 1933 Act and securities  that are not  registered  under the 1933 Act but
can be sold to "qualified  institutional  buyers" in  accordance  with Rule 144A
under the 1933 Act. These securities will not be considered  illiquid so long as
the Investment  Adviser  determines,  under  guidelines  approved by the Trust's
Board of Trustees,  that an adequate trading market exists.  This practice could
increase the level of illiquidity during any period that qualified institutional
buyers become uninterested in purchasing these securities.

Investment Restrictions

     The  Portfolio  is  subject  to  the  fundamental  investment  restrictions
enumerated  below  which  may be  changed  only  by a vote of the  holders  of a
majority of the Portfolio's outstanding shares.

The Portfolio may not:

     (1) Make  loans,  except (a) through the  purchase of debt  obligations  in
     accordance  with the  Portfolio's  investment  objective and policies,  (b)
     through  repurchase  agreements  with  banks,  brokers,  dealers  and other
     financial institutions, and (c) loans of securities.

     (2)  Mortgage,  pledge or  hypothecate  any assets  (other than pursuant to
     reverse repurchase agreements) except to secure permitted borrowings.

     (3)  Purchase  or sell real  estate  or  securities  issued by real  estate
     investment  trusts,  but this  restriction  shall not prevent the Portfolio
     from investing directly or indirectly in portfolio  instruments  secured by
     real estate or interests therein.

     (4) Purchase or sell  commodities  or commodity  contracts or oil or gas or
     other mineral exploration or development programs.

     (5)  Invest  in  companies  for  the  purpose  of  exercising   control  or
     management.

     (6) Act as underwriter of securities (except as the Portfolio may be deemed
     to be an underwriter  under the  Securities Act of 1933 in connection  with
     the purchase  and sale of  portfolio  instruments  in  accordance  with its
     investment   objective  and  portfolio   management   policies),   purchase
     securities  on  margin   (except  for  delayed   delivery  or   when-issued
     transactions or such short-term  credits as are necessary for the clearance
     of  transactions),  make  short  sales of  securities  or  maintain a short
     position, or write puts, calls or combinations thereof.

     (7) Make any investment inconsistent with the Portfolio's classification as
     a diversified investment company under the 1940 Act.

     (8) Purchase  securities if such purchase  would cause more than 25% in the
     aggregate of the market  value of the total  assets of the  Portfolio to be
     invested in the  securities of one or more issuers  having their  principal
     business  activities  in the  same  industry,  provided  that  there  is no
     limitation with respect to, and the Portfolio  reserves  freedom of action,
     when otherwise consistent with its investment policies,  to concentrate its
     investments in obligations issued or guaranteed by the U.S. Government, its
     agencies or  instrumentalities,  obligations  (other than commercial paper)
     issued or guaranteed by U.S.  banks and U.S.  branches of foreign banks and
     repurchase  agreements and  securities  loans  collateralized  by such U.S.
     Government  obligations or such bank obligations.  For the purposes of this
     restriction,  state  and  municipal  governments  and  their  agencies  and
     authorities are not deemed to be industries;  as to utility companies,  the
     gas,  electric,  water and telephone  businesses  are  considered  separate
     industries;  personal credit finance  companies and business credit finance
     companies are deemed to be separate  industries;  and wholly-owned  finance
     companies are  considered to be in the industries of their parents if their
     activities  are  primarily  related to financing  the  activities  of their
     parents.

     (9) Borrow money (other than pursuant to reverse repurchase  agreements for
     the Portfolio described above), except (a) as a temporary measure, and then
     only in amounts  not  exceeding  5% of the value of the  Portfolio's  total
     assets  or (b)  from  banks,  provided  that  immediately  after  any  such
     borrowing all  borrowings  of the Portfolio do not exceed  one-third of the
     Portfolio's  total  assets.  No  purchases  of  securities  will be made if
     borrowings  subject  to this  restriction  exceed  5% of the  value  of the
     Portfolio's  assets.  The exceptions in (a) and (b) to this restriction are
     not for investment  leverage  purposes but are solely for  extraordinary or
     emergency purposes or to facilitate  management of the Trust's Portfolio by
     enabling the Trust to meet  redemption  requests  when the  liquidation  of
     portfolio  instruments is deemed to be disadvantageous or not possible.  If
     due to  market  fluctuations  or other  reasons  the  total  assets  of the
     Portfolio fall below 300% of its borrowings, the Trust will promptly reduce
     the borrowings of such Portfolio in accordance with the 1940 Act.

     (10)  Notwithstanding  any  of the  Trust's  other  fundamental  investment
     restrictions (including, without limitation, those restrictions relating to
     issuer diversification,  industry concentration and control), the Portfolio
     may (a)  purchase  securities  of other  investment  companies  to the full
     extent  permitted  under  Section  12 of the  1940  Act (or  any  successor
     provision  thereto) or under any  regulation or order of the Securities and
     Exchange Commission;  and (b) invest all or substantially all of its assets
     in  a  single   open-end   investment   company  or  series   thereof  with
     substantially  the same  investment  objective,  policies  and  fundamental
     restrictions as the Portfolio.

                                      * * *

     The freedom of action  reserved in  Restriction  No. 8 with respect to U.S.
branches of foreign banks is subject to the requirement that they are subject to
the same  regulation as domestic  branches of U.S.  banks.  Obligations  of U.S.
branches of foreign banks may include certificates of deposit,  bank and deposit
notes,  bankers'  acceptances and fixed time deposits.  These obligations may be
general  obligations of the parent bank or may be limited to the issuing branch.
Such obligations  will meet the criteria for "Eligible  Securities" as described
in the Prospectus.

     In addition, as a matter of fundamental policy, the Portfolio may not enter
into reverse repurchase  agreements  exceeding in the aggregate one-third of its
total assets.

     Also, as a matter of fundamental policy,  changeable only with the approval
of the  holders of a majority of the  outstanding  shares of the  Portfolio,  at
least 80% of the annual gross income of the Portfolio  will be derived from debt
instruments, the interest on which is, in the opinion of bond counsel or counsel
for issuers,  exempt from regular  Federal income tax,  except in  extraordinary
circumstances   such  as  when  the  Investment  Adviser  believes  that  market
conditions  indicate  that the  Portfolio  should  adopt a  temporary  defensive
posture by holding uninvested cash or investing in taxable securities.  Interest
earned by the Portfolio on "private  activity  bonds" that is treated as an item
of tax  preference  under  Federal  alternative  minimum tax will be exempt from
regular  Federal  income tax for purposes of  determining  whether the Portfolio
meets this fundamental policy.

     Securities  held in escrow or  separate  accounts  in  connection  with the
Portfolio's  investment  practices described in this Additional Statement and in
the  Prospectus  are not deemed to be  mortgaged,  pledged or  hypothecated  for
purposes of the foregoing Investment Restrictions.

     Except to the extent  otherwise  provided in Investment  Restriction No. 8,
for the purpose of such restriction in determining  industry  classification the
Trust  intends  to use  the  industry  classification  titles  in  the  Standard
Industrial Classification Manual.

     In applying  Restriction No. 8 above, a security is considered to be issued
by the entity,  or  entities,  whose assets and revenues  back the  security.  A
guarantee of a security is not deemed to be a security  issued by the  guarantor
when the value of all securities  issued and  guaranteed by the  guarantor,  and
owned by the  Portfolio,  does not  exceed  10% of the value of the  Portfolio's
total assets.

     Any restriction which involves a maximum  percentage will not be considered
violated unless an excess over the percentage occurs  immediately  after, and is
caused  by, an  acquisition  or  encumbrance  of  securities  or  assets  of, or
borrowings by, the Portfolio.

     The  Portfolio  intends,  as a  non-fundamental  policy,  to diversify  its
investments  in  accordance  with current SEC  regulations.  Investments  in the
securities of any single issuer (excluding cash, cash items,  certain repurchase
agreements,  U.S.  Government  securities  and  securities  of other  investment
companies)  will be limited to not more than 5% of the value of the  Portfolio's
total assets at the time of purchase,  except that 25% of the value of the total
assets of the Portfolio may be invested in the  securities of any one issuer for
a period of up to three  Business  Days.  A security  that has an  unconditional
guarantee  meeting special SEC  requirements  (a  "Guarantee")  does not need to
satisfy the foregoing issuer  diversification  requirements that would otherwise
apply,  but the Guarantee is instead  subject to the  following  diversification
requirements:  immediately after the acquisition of the security,  the Portfolio
may not have invested more than 10% of its total assets in securities  issued by
or subject to Guarantees  from the same person,  except that the Portfolio  may,
subject  to  certain  conditions,  invest  up to  25%  of its  total  assets  in
securities  issued or subject to Guarantees of the same person.  This percentage
is 100% if the Guarantee is issued by the U.S.  Government or an agency thereof.
In  addition,  the  Portfolio  will limit its  investments  in  certain  conduit
securities  that are not rated in the  highest  short-term  rating  category  as
determined by two nationally  recognized  statistical rating organizations (each
an  "NRSRO")  (or one NRSRO if the  security  is rated by only one NRSRO) or, if
unrated,  are not of comparable  quality to First Tier Securities  ("Second Tier
Securities"), to 5% of its total assets, with investments in any one such issuer
being limited to no more than 1% of the Portfolio's  total assets or $1 million,
whichever  is greater,  measured  at the time of  purchase.  Conduit  securities
subject to this limitation are municipal  instruments  that are not subject to a
Guarantee and involve an arrangement whereunder a person, other than a municipal
issuer, provides for or secures repayment of the security and are not: (i) fully
and  unconditionally  guaranteed by a municipal issuer; or (ii) payable from the
general  revenues of the municipal issuer or other municipal  issuers;  or (iii)
related to a project owned and operated by a municipal  issuer;  or (iv) related
to a facility  leased to and under the control of an  industrial  or  commercial
enterprise  that is part of a public  project  which,  as a whole,  is owned and
under the control of a municipal issuer.

     In  addition  to the  foregoing,  the  Portfolio  is subject to  additional
diversification  requirements  imposed by SEC  regulations on the acquisition of
securities subject to other types of demand features.

                          ADDITIONAL TRUST INFORMATION

TRUSTEES AND OFFICERS

     The business and affairs of the Trust and the  Portfolio  are managed under
the  direction of the Trust's Board of Trustees.  Information  pertaining to the
Trustees and officers of the Trust is set forth below.
<TABLE>
<CAPTION>
<S><C>                           <C>         <C>                   <C>

NAME                                       POSITION(S)          PRINCIPAL OCCUPATION(S)
AND ADDRESS                      AGE       WITH TRUST           DURING PAST 5 YEARS

William H. Springer              69        Chairman              Director of Walgreen Co. (a retail drug
701 Morningside Drive                      and                   store business) since April 1988; Director
Lake Forest, IL 60045                      Trustee               of Baker, Fentress & Co. (a closed-end,
                                                                 non-diversified management investment
                                                                 company) from April 1992 to present; Trustee
                                                                 of Goldman Sachs Trust from 1989 to present.

Richard Gordon Cline             64        Trustee               Chairman and Director of Hussman
4200 Commerce Court,                                             International Inc. (commercial refrigeration
Suite 300                                                        company) since January 1998; Chairman of
Lisle, IL 60532                                                  Hawthorne Inc. (a management advisory
                                                                 services and private investment company)
                                                                 since January 1996; Chairman, President and
                                                                 CEO of NICOR Inc. (a diversified public
                                                                 utility holding company) from 1985 to 1996;
                                                                 Chairman and Director of the Federal Reserve
                                                                 Bank of Chicago from 1992 to 1995; Director
                                                                 of Central DuPage Health System, Pet
                                                                 Incorporated, Whitman Corporation (a
                                                                 diversified holding company), Kmart
                                                                 Corporation (a retailing company), Ryerson
                                                                 Tull, Inc. (a metals distribution company)
                                                                 and University of Illinois Foundation.

Edward J. Condon, Jr.            58        Trustee               Chairman and CEO of The Paradigm Group, Ltd.
Sears Tower, Suite 9650                                          (a financial advisor) since July 1993;
233 S. Wacker Drive                                              within the last five years he has served as
Chicago, IL 60606                                                Vice Chairman and Director of Energenics
                                                                 L.L.C.; Director of Financial Pacific
                                                                 Company; Member of the Board of Managers of
                                                                 The Liberty Hampshire Company, LLC; Member
                                                                 of Advisory Board of Real-Time U.S.A., Inc;
                                                                 Member of the Board of Directors of
                                                                 University Elder Care, Inc; Member of the
                                                                 Board of Directors of the Girl Scouts of
                                                                 Chicago; Member of the Board of Trustees of
                                                                 Dominican University.

John W. English                  66        Trustee               Private Investor since 1993; Vice President
50-H New England Ave.                                            and Chief Investment Officer of The Ford
P.O. Box 640                                                     Foundation (a charitable trust) from 1981
Summit, NJ 07902-0640                                            until 1993; Trustee of The China Fund,
                                                                 Inc., American Red Cross in Greater New
                                                                 York, Mote Marine Laboratory, State Street's
                                                                 Select Sector SPDR Trust, Washington
                                                                 Mutual's WM Funds and United Board for
                                                                 Christian Higher Education in Asia. Director
                                                                 of University of Iowa Foundation,
                                                                 Blanton-Peale Institutes of Religion and
                                                                 Health, Community Foundation of Sarasota
                                                                 County, and Duke Management Company.

Sandra Polk Guthman              55        Trustee               President and CEO of Polk Bros. Foundation
420 N. Wabash Avenue                                             (an Illinois not-for-profit corporation)
Suite 204                                                        from 1993 to present; Director of Business
Chicago, IL 60611                                                Transformation from 1992-1993 and Midwestern
                                                                 Director of Marketing from 1988-1992 for IBM
                                                                 Corporation; Director of MBIA Insurance
                                                                 Corporation of Illinois (bank holding
                                                                 company) since 1994 and Avondale Financial
                                                                 Corporation (a stock savings and loan
                                                                 holding company) since 1995.

Frederick T. Kelsey             71         Trustee               Consultant to Goldman Sachs from December
3133 Laughing Gull Court                                         1985 through February 1988; Director of
Johns Island, SC 29455                                           Goldman Sachs Funds Group and Vice President
                                                                 of Goldman Sachs from May 1981 until his
                                                                 retirement in November 1985; President and
                                                                 Treasurer of the Trust and other investment
                                                                 companies affiliated with Goldman Sachs
                                                                 through August 1985; President from 1983 to
                                                                 1985 and Trustee from 1983 to 1994 of The
                                                                 Centerland Funds and its successor, The
                                                                 Pilot Funds; Trustee of various management
                                                                 investment companies affiliated with Zurich
                                                                 Kemper Investments.

Richard P. Strubel               59        Trustee               Managing Director of Tandem Partners, Inc.
737 N. Michigan Avenue                                           (a privately held management services firm)
Suite 1405                                                       since 1990; President and CEO of Microdot,
Chicago, IL 60611                                                Inc. (a privately held manufacturing firm)
                                                                 from January 1984 to October 1994; Trustee
                                                                 of Goldman Sachs Trust from 1987 to present;
                                                                 Director of Kaynar Technologies Inc. (a
                                                                 leading manufacturer of aircraft fasteners)
                                                                 since March 1997; Trustee of the University
                                                                 of Chicago; Director of Children's Memorial
                                                                 Medical Center.

Jylanne M. Dunne                 39        President             Senior Vice President for Distribution
4400 Computer Drive                                              Services at First Data Investor Services
Westborough, MA 01581                                            Group, Inc. ("FDISG") (since 1988).

Richard H. Rose                  43        Vice                  Vice President and Division Manager of
4400 Computer Drive                        President             Mutual Fund Administration at FDISG (since
Westborough, MA 01581                                            1994); Senior Vice President at The Boston
                                                                 Company Advisors, Inc. (prior thereto).

Brian R. Curran                  31        Treasurer             Director of Fund Administration and
4400 Computer Drive                                              Accounting at FDISG (since 1997); Director
Westborough, MA 01581                                            of Fund Administration at State Street Bank
                                                                 (February 1997 to October 1997); Senior
                                                                 Auditor at Price Waterhouse L.L.P. (February
                                                                 1994 to February 1997); Manager of Fund
                                                                 Accounting at State Street Bank (prior
                                                                 thereto).

Linda J. Hoard                   51        Secretary             Counsel at FDISG (since 1998); Attorney
4400 Computer Drive                                              Consultant for Fidelity Investments,
Westborough, MA 01581                                            Investors Bank & Trust Company and FDISG
                                                                 (September 1994 to June 1998); Vice
                                                                 President and Assistant General Counsel at
                                                                 MFS Investment Management (prior thereto).

Teresa M.R. Hamlin               34        Assistant             Counsel at FDISG (since 1994); Paralegal
4400 Computer Drive                        Secretary             Manager at The Boston Company Advisors, Inc.
Westborough, MA 01581                                            (prior thereto).

Therese Hogan                    36        Assistant             Director of the State Regulation Department
4400 Computer Drive                        Secretary             at FDISG (since 1994); Senior Legal
Westborough, MA 01581                                            Assistant at Palmer and Dodge (prior
                                                                 thereto).
</TABLE>

     None of the Trustees is an "interested  person" under the 1940 Act. Certain
of the  Trustees  and  officers  and  the  organizations  with  which  they  are
associated have had in the past, and may have in the future,  transactions  with
Northern,  FDISG,  First Data  Distributors,  Inc. ("FDDI" and collectively with
FDISG, "First Data") and their respective affiliates. The Trust has been advised
by such  Trustees  and  officers  that all such  transactions  have been and are
expected  to be in the  ordinary  course  of  business  and  the  terms  of such
transactions,  including all loans and loan  commitments  by such persons,  have
been and are expected to be  substantially  the same as the prevailing terms for
comparable transactions for other customers. As a result of the responsibilities
assumed by Northern under its Advisory  Agreement,  Transfer  Agency  Agreement,
Custodian Agreement,  and  Co-Administration  Agreement with the Trust, by FDISG
under its  Co-Administration  Agreement  with the  Trust  and by FDDI  under its
Distribution Agreement with the Trust, the Trust itself requires no employees.

     Each officer  holds  comparable  positions  with certain  other  investment
companies of which First Data or an affiliate thereof is the investment adviser,
administrator and/or distributor.

     Each Trustee  earns a quarterly  retainer of $6,750 and the Chairman of the
Board  earns a  quarterly  retainer  of $10,125.  Each  Trustee,  including  the
Chairman  of the  Board,  earns an  additional  fee of $2,500  for each  meeting
attended, plus reimbursement of expenses incurred as a Trustee.

     In addition,  the Trustees  established  an Audit  Committee  consisting of
three members including a Chairman of the Committee. The Audit Committee members
are Messrs.  Condon,  Kelsey and Strubel (Chairman).  Each member earns a fee of
$2,500 for each meeting attended and the Chairman earns a quarterly  retainer of
$1,500.

     Each Trustee will hold office for an indefinite  term until the earliest of
(1) the  next  meeting  of  shareholders,  if any,  called  for the  purpose  of
considering  the election or  re-election of such Trustee and until the election
and qualification of his or her successor,  if any, elected at such meeting; (2)
the date a Trustee  resigns or retires,  or a Trustee is removed by the Board of
Trustees  or  shareholders,   in  accordance  with  the  Trust's  Agreement  and
Declaration of Trust, or (3) in accordance  with the current  resolutions of the
Board of Trustees (which may be changed without  shareholder  vote), on the last
day of the  fiscal  year of the Trust in which he or she  attains  the age of 72
years.

     The Trust's  officers do not  receive  fees from the Trust for  services in
such capacities,  although FDISG, of which they are also officers, receives fees
from the Trust for administrative services.


     The  following  table sets forth  certain  information  with respect to the
compensation of each Trustee of the Trust for the one-year period ended November
30, 1998:
<TABLE>
<CAPTION>
<S> <C>                       <C>                   <C>                              <C>

                              Aggregate             Pension or Retirement           Total Compensation From
                              Compensation          Benefits Accrued as a Part of   Trust Paid
Name of Trustee               from the Trust        Trust's Expenses                to Trustees

William H. Springer           $46,750               N/A                             $46,750
Richard G. Cline              $34,000               N/A                             $34,000
Edward J. Condon, Jr.         $37,000               N/A                             $37,000
John W. English               $32,500               N/A                             $32,500
Sandra Polk Guthman           $34,000               N/A                             $34,000
Frederick T. Kelsey           $37,000               N/A                             $37,000
Richard P. Strubel            $42,250               N/A                             $42,250
</TABLE>

Investment Adviser, Transfer Agent and Custodian

     Northern, a wholly-owned  subsidiary of Northern Trust Corporation,  a bank
holding  company,  is  one  of the  nation's  leading  providers  of  trust  and
investment  management  services.  As of September  30,  1999,  Northern and its
affiliates  had over  $___  billion  in  assets  under  management  for  clients
including public and private retirement funds, endowments,  foundations, trusts,
corporations,  and  individuals.  Northern  is  one  of  the  strongest  banking
organizations  in  the  United  States.  Northern  believes  it  has  built  its
organization  by serving clients with  integrity,  a commitment to quality,  and
personal  attention.  Its  stated  mission  with  respect  to all its  financial
products and services is to achieve unrivaled client satisfaction.  With respect
to such clients,  the Trust is designed to assist (i) defined  contribution plan
sponsors and their employees by offering a range of diverse  investment  options
to help comply with 404(c) regulation and may also provide educational  material
to their  employees,  (ii)  employers  who  provide  post-retirement  Employees'
Beneficiary  Associations  ("VEBA") and require  investments that respond to the
impact of Federal  regulations,  (iii)  insurance  companies with the day-to-day
management of uninvested  cash balances as well as with  longer-term  investment
needs, and (iv) charitable and not-for-profit organizations,  such as endowments
and  foundations,  demanding  investment  management  solutions that balance the
requirement  for sufficient  current  income to meet operating  expenses and the
need for capital appreciation to meet future investment objectives.

     Northern  employs  a team  approach  to the  investment  management  of the
Portfolio,  relying upon investment  professionals under the leadership of James
M. Snyder, Chief Investment Officer and Executive Vice President of Northern.

     Under its  Advisory  Agreement  with the  Trust,  Northern,  subject to the
general supervision of the Trust's Board of Trustees,  is responsible for making
investment  decisions for the Portfolio and placing purchase and sale orders for
the  portfolio  transactions  of the  Portfolio.  In connection  with  portfolio
transactions for the Portfolio,  which are generally done at a net price without
a broker's  commission,  Northern's  Advisory  Agreement  provides that Northern
shall attempt to obtain the best net price and execution.

     Northern's investment advisory duties for the Trust are carried out through
its Trust Department. On occasions when Northern deems the purchase or sale of a
security to be in the best interests of the Portfolio as well as other fiduciary
or agency  accounts  managed by it (including  any other  portfolio,  investment
company or account for which Northern acts as adviser),  the Investment Advisory
Agreement provides that Northern, to the extent permitted by applicable laws and
regulations,  may  aggregate  the  securities  to be sold or  purchased  for the
Portfolio with those to be sold or purchased for such other accounts in order to
obtain best net price and execution. In such event, allocation of the securities
so purchased or sold, as well as the expenses incurred in the transaction,  will
be made by  Northern  in the  manner  it  considers  to be  most  equitable  and
consistent  with its fiduciary  obligations  to the Portfolio and other accounts
involved. In some instances, this procedure may adversely affect the size of the
position  obtainable for the Portfolio or the amount of the securities  that are
able to be sold for the  Portfolio.  To the extent that the  execution and price
available from more than one broker or dealer are believed to be comparable, the
Investment Advisory Agreement permits Northern, at its discretion but subject to
applicable  law,  to  select  the  executing  broker  or  dealer on the basis of
Northern's opinion of the reliability and quality of such broker or dealer.

     The Advisory  Agreement  provides that Northern may render similar services
to others so long as its services under such Agreement are not impaired thereby.
The Advisory  Agreement  also  provides that the Trust will  indemnify  Northern
against certain liabilities  (including liabilities under the Federal securities
laws  relating to untrue  statements  or omissions of material  fact and actions
that are in  accordance  with the terms of the  Agreement)  or, in lieu thereof,
contribute to resulting losses.

     Under its Transfer Agency Agreement with the Trust, Northern has undertaken
to (1) answer  customer  inquiries  regarding  the current yield of, and certain
other matters (e.g.  account status  information)  pertaining to, the Trust, (2)
process purchase and redemption  transactions,  including transactions generated
by any service provided outside of the Agreement by Northern,  its affiliates or
correspondent  banks whereby  customer  account cash balances are  automatically
invested in shares of the  Portfolio,  and the  disbursement  of the proceeds of
redemptions,  (3) establish and maintain  separate omnibus accounts with respect
to  shareholders  investing  through  Northern  or  any of  its  affiliates  and
correspondent  banks  and  act as  transfer  agent  and  perform  sub-accounting
services  with respect to each such  account,  (4) provide  periodic  statements
showing account balances,  (5) mail reports and proxy materials to shareholders,
(6) provide  information  in  connection  with the  preparation  by the Trust of
various  regulatory  reports and prepare reports to the Trustees and management,
(7) answer  inquiries  (including  requests for  prospectuses  and statements of
additional  information,  and  assistance  in  the  completion  of  new  account
applications)  from  investors  and  respond  to all  requests  for  information
regarding the Trust (such as current price, recent performance,  and yield data)
and  questions  relating to accounts of  investors  (such as possible  errors in
statements, and transactions), (8) respond to and seek to resolve all complaints
of investors  with  respect to the Trust or their  accounts,  (9) furnish  proxy
statements  and  proxies,  annual  and  semi-annual  financial  statements,  and
dividend,  distribution and tax notices to investors, (10) furnish the Trust all
pertinent Blue Sky information,  (11) perform all required tax withholding, (12)
preserve  records,  and (13) furnish  necessary  office  space,  facilities  and
personnel.  Northern  may  appoint  one or  more  sub-  transfer  agents  in the
performance of its services.

     As  compensation  for the services  rendered by Northern under the Transfer
Agency  Agreement with respect to Service Shares and Premier Shares described in
this  Additional  Statement and the assumption by Northern of related  expenses,
Northern  is  entitled  to a fee from the Trust,  calculated  daily and  payable
monthly,  at the following annual rates: (i) .01% of the average daily net asset
value of the outstanding  Service Shares of the Portfolio;  and (ii) .02% of the
average  daily  net  asset  value  of  the  outstanding  Premier  Shares  of the
Portfolio. The transfer agency fee attributable to each class of shares is borne
solely by that class.  Northern's affiliates and correspondent banks may receive
compensation  for performing the services  described in the preceding  paragraph
that Northern would otherwise receive.  Conflict-of-interest  restrictions under
state and Federal law (including the Employee  Retirement Income Security Act of
1974) may apply to the receipt by such affiliates or correspondent banks of such
compensation  in connection  with the  investment of fiduciary  funds in Service
Shares and Premier Shares of the Portfolio.

     Under  its  Custodian  Agreement  with the  Trust,  Northern  (1) holds the
Portfolio's  cash and  securities,  (2)  maintains  such cash and  securities in
separate  accounts  in the  name  of  the  Portfolio,  (3)  makes  receipts  and
disbursements  of funds on behalf of the Portfolio,  (4) receives,  delivers and
releases  securities on behalf of the  Portfolio,  (5) collects and receives all
income,  principal and other payments in respect of the  Portfolio's  securities
held by Northern under the Custodian Agreement, and (6) maintains the accounting
records of the Trust.  Northern may employ one or more  subcustodians,  provided
that Northern,  subject to certain  monitoring  responsibilities,  shall have no
more  responsibility  or  liability  to the Trust on  account  of any  action or
omission of any subcustodian so employed than such  subcustodian has to Northern
and that the  responsibility  or liability of the subcustodian to Northern shall
conform  to  the  resolution  of  the  Trustees  of the  Trust  authorizing  the
appointment of the particular subcustodian.  Northern may also appoint agents to
carry out such of the provisions of the Custodian Agreement as Northern may from
time to time direct, provided that the appointment of an agent shall not relieve
Northern of any of its responsibilities under the Agreement.

     As  compensation  for the  services  rendered  to the Trust by  Northern as
custodian, and the assumption by Northern of certain related expenses,  Northern
is entitled to payment from the Trust as follows:  (i) $18,000  annually for the
Portfolio, plus (ii) 1/100th of 1% annually of the Portfolio's average daily net
assets to the extent they exceed $100 million, plus (iii) a fixed dollar fee for
each trade in portfolio  securities,  plus (iv) a fixed dollar fee for each time
that  Northern as  custodian  receives  or  transmits  funds via wire,  plus (v)
reimbursement  of expenses  incurred by Northern  as  custodian  for  telephone,
postage, courier fees, office supplies and duplicating.  The fees referred to in
clauses  (iii)  and (iv) are  subject  to  annual  upward  adjustments  based on
increases in the Consumer  Price Index for All Urban  Consumers,  provided  that
Northern may  permanently or temporarily  waive all or any portion of any upward
adjustment.

     Northern's  fees under the  Custodian  Agreement  are subject to  reduction
based on the Portfolio's daily uninvested cash balances (if any).

     Unless sooner terminated,  each of the Advisory Agreement,  Transfer Agency
Agreement and Custodian  Agreement  between Northern and the Trust will continue
in effect with respect to the Portfolio until April 30, 2000, and thereafter for
successive 12-month periods,  provided that the continuance is approved at least
annually  (1) by the vote of a majority of the  Trustees  who are not parties to
the agreement or "interested  persons" (as such term is defined in the 1940 Act)
of any party  thereto,  cast in person at a meeting  called  for the  purpose of
voting on such  approval and (2) by the Trustees or by the vote of a majority of
the  outstanding  shares  of  the  Portfolio  (as  defined  below  under  "Other
Information").  Each agreement is terminable at any time without  penalty by the
Trust (by specified Trustee or shareholder action) on 60 days' written notice to
Northern and by Northern on 60 days' written notice to the Trust.

     Banking laws and  regulations  currently  prohibit a bank  holding  company
registered  under the Federal  Bank  Holding  Company Act of 1956 or any bank or
non-bank   affiliate  thereof  from  sponsoring,   organizing,   controlling  or
distributing the shares of a registered open-end investment company continuously
engaged in the issuance of its shares,  but such banking laws and regulations do
not prohibit such a holding  company or affiliate or banks generally from acting
as  investment  adviser,  transfer  agent  or  custodian  to such an  investment
company,  or from purchasing  shares of such a company as agent for and upon the
order  of  customers.  Northern  believes  that  it  may  perform  the  services
contemplated by its agreements with the Trust without  violation of such banking
laws or  regulations,  which are applicable to it. It should be noted,  however,
that future changes in either Federal or state statutes and regulations relating
to the permissible activities of banks and their subsidiaries or affiliates,  as
well as future  judicial  or  administrative  decisions  or  interpretations  of
current  and future  statutes  and  regulations,  could  prevent  Northern  from
continuing to perform such services for the Trust.

     Should future  legislative,  judicial or administrative  action prohibit or
restrict the activities of Northern in connection with the provision of services
on behalf of the Trust,  the Trust  might be  required  to alter  materially  or
discontinue its arrangements  with Northern and change its method of operations.
It is not  anticipated,  however,  that any  change  in the  Trust's  method  of
operations would affect the net asset value per share of the Portfolio or result
in a  financial  loss to any  shareholder.  Moreover,  if  current  restrictions
preventing  a  bank  from  legally   sponsoring,   organizing,   controlling  or
distributing  shares of an open-end  investment company were relaxed,  the Trust
expects that  Northern and its  affiliates  would  consider the  possibility  of
offering to perform some or all of the  services now provided by First Data.  It
is not possible, of course, to predict whether or in what form such restrictions
might be relaxed or the terms upon which Northern and its affiliates might offer
to provide services for consideration by the Trustees.

     Northern is active as an  underwriter of municipal  instruments.  Under the
1940 Act,  the  Portfolio  is  precluded,  subject to certain  exceptions,  from
purchasing in the primary  market those  municipal  instruments  with respect to
which  Northern  is  serving  as a  principal  underwriter.  In the  opinion  of
Northern,  this  limitation  will not  significantly  affect the  ability of the
Portfolio to pursue its investment objective.

     Under a Service  Mark  License  Agreement  with the Trust,  Northern  Trust
Corporation has agreed that the name "Northern  Institutional Funds" may be used
in connection with the Trust's business on a royalty-free basis.  Northern Trust
Corporation has reserved to itself the right to grant the non-exclusive right to
use the name "Northern  Institutional  Funds" to any other person. The Agreement
provides  that at such time as the  Agreement is no longer in effect,  the Trust
will cease using the name "Northern Institutional Funds."

Portfolio Transactions

     To the extent that the Portfolio effects brokerage  transactions with First
Data or any broker/dealer  affiliated directly or indirectly with the Investment
Adviser, such transactions,  including the frequency thereof, the receipt of any
commissions payable in connection therewith, and the selection of the affiliated
broker/dealer  effecting such  transactions,  will be fair and reasonable to the
shareholders of the Portfolio.

Co-Administrators and Distributor

     Northern and FDISG, 4400 Computer Drive, Westborough,  Massachusetts 01581,
act as co-administrators  for the Portfolio under a Co-Administration  Agreement
with the Trust.  Subject to the  general  supervision  of the  Trust's  Board of
Trustees,  Northern and FDISG (the  "Co-Administrators")  provide supervision of
all  aspects of the  Trust's  non-investment  advisory  operations  and  perform
various corporate secretarial, treasury and blue sky services, including but not
limited to: (a) maintaining office facilities and furnishing  corporate officers
for the Trust; (b) furnishing data processing services,  clerical services,  and
executive  and  administrative  services  and  standard  stationery  and  office
supplies;  (c) performing all functions  ordinarily performed by the office of a
corporate  treasurer,  and  furnishing  the services and  facilities  ordinarily
incident thereto,  such as expense accrual monitoring and payment of the Trust's
bills, preparing monthly reconciliation of the Trust's expense records, updating
projections of annual expenses,  preparing  materials for review by the Board of
Trustees and compliance  testing;  (d) preparing and  submitting  reports to the
Trust's   shareholders  and  the  SEC;  (e)  preparing  and  printing  financial
statements;  (f) preparing monthly Portfolio profile reports;  (g) preparing and
filing the Trust's  Federal and state tax returns  (other than those required to
be filed by the Trust's custodian and transfer agent) and providing  shareholder
tax  information  to the Trust's  transfer  agent;  (h)  assisting  in marketing
strategy   and  product   development;   (i)   performing   oversight/management
responsibilities,  such as the  supervision  and  coordination of certain of the
Trust's service  providers;  (j) effecting and maintaining,  as the case may be,
the  registration  of shares of the Trust for sale under the securities  laws of
various  jurisdictions;  (k) assisting in maintaining corporate records and good
standing  status of the Trust in its state of  organization;  and (l) monitoring
the Trust's  arrangements  with respect to services provided by Servicing Agents
to  their  customers  who are the  beneficial  owners  of  shares,  pursuant  to
servicing agreements between the Trust and such Servicing Agents.

     Subject to the  limitations  described  below,  as  compensation  for their
administrative   services  and  the   assumption   of  related   expenses,   the
Co-Administrators  are entitled to a fee from the Portfolio,  computed daily and
payable  monthly,  at an annual rate of .10% of the average  daily net assets of
the  Portfolio.  The  Co-Administrators  will  reimburse  the  Portfolio for its
expenses (including  administration fees payable to the  Co-Administrators,  but
excluding advisory fees, transfer agency fees,  servicing fees and extraordinary
expenses) which exceed on an annualized  basis .10% of the  Portfolio's  average
daily net assets.

     Unless sooner terminated, the Co-Administration  Agreement will continue in
effect until April 30, 2001, and  thereafter for successive  one-year terms with
respect to the Portfolio,  provided that the agreement is approved  annually (1)
by the Board of  Trustees  or (2) by the vote of a majority  of the  outstanding
shares of the Portfolio (as defined below under "Other  Information"),  provided
that in either  event the  continuance  is also  approved  by a majority  of the
Trustees who are not parties to the Agreement and who are not interested persons
(as defined in the 1940 Act) of any party  thereto,  by vote cast in person at a
meeting called for the purpose of voting on such approval. The Co-Administration
Agreement is terminable at any time after April 30, 2001, without penalty by the
Trust  on at  least  60  days  written  notice  to the  Co-Administrators.  Each
Co-Administrator may terminate the  Co-Administration  Agreement with respect to
itself at any time  after  April 30,  2001  without  penalty on at least 60 days
written notice to the Trust and the other Co-Administrator.

     The Trust may terminate the Co-Administration  Agreement prior to April 30,
2001 in the event that the Trust or its shareholders  incur damages in excess of
$100,000 as a result of the willful misfeasance,  bad faith or negligence of the
Co-Administrators,   or  the  reckless  disregard  of  their  duties  under  the
Agreement. The Trust may also terminate the Co-Administration Agreement prior to
April 30, 2001 in the event that the  Co-Administrators  fail to meet one of the
performance standards set forth in the Agreement.

     The Trust has entered into a Distribution  Agreement with FDDI, under which
FDDI, as agent,  sells Service  Shares and Premier  Shares of the Portfolio on a
continuous basis.  FDDI pays the cost of printing and distributing  prospectuses
to persons  who are not  shareholders  of the Trust and of sales  presentations,
advertising and other  distribution  efforts.  No compensation is payable by the
Trust to FDDI for such distribution services.

     The  Co-Administration  Agreement provides that the  Co-Administrators  may
render similar services to others so long as their services under such Agreement
are not impaired thereby. The Co-Administration Agreement also provides that the
Trust will  indemnify  each  Co-Administrator  against all claims  except  those
resulting  from  the  willful  misfeasance,  bad  faith  or  negligence  of such
Co-Administrator,  or the  Co-Administrator's  breach  of  confidentiality.  The
Distribution  Agreement  provides  that the Trust will  indemnify  FDDI  against
certain liabilities  relating to untrue statements or omissions of material fact
except those  resulting from the reliance on information  furnished to the Trust
by  FDDI,  or  those  resulting  from  the  willful  misfeasance,  bad  faith or
negligence of FDDI, or FDDI's breach of confidentiality.  FDDI is a wholly-owned
subsidiary  of  FDISG,  which  is  a  wholly-owned   subsidiary  of  First  Data
Corporation.

Counsel and Auditors

     Drinker  Biddle & Reath LLP,  with  offices at One Logan  Square,  18th and
Cherry Streets,  Philadelphia,  Pennsylvania 19103-6996, serve as counsel to the
Trust.

     Ernst & Young LLP,  independent  auditors,  233 S. Wacker  Drive,  Chicago,
Illinois  60606,  have been  selected as  auditors of the Trust.  In addition to
audit  services,  Ernst & Young LLP reviews  the  Trust's  Federal and state tax
returns,  and provides  consultation  and  assistance  on  accounting,  internal
control and related matters.

In-Kind Purchases and Redemptions

     Payment for Service  Shares and Premier Shares of the Portfolio may, in the
discretion of Northern,  be made in the form of securities  that are permissible
investments  for the  Portfolio  as  described  in the  Prospectus.  For further
information about this form of payment,  contact Northern. In connection with an
in-kind securities payment, the Portfolio will require, among other things, that
the  securities be valued on the day of purchase in accordance  with the pricing
methods  used by the  Portfolio  and that  the  Portfolio  receive  satisfactory
assurances  that it will  have  good  and  marketable  title  to the  securities
received  by it;  that the  securities  be in proper  form for  transfer  to the
Portfolio;  and that adequate  information be provided  concerning the basis and
other tax matters relating to the securities.

     Although the Portfolio  generally  will redeem  Service  Shares and Premier
Shares in cash,  it  reserves  the right to pay  redemptions  by a  distribution
in-kind of  securities  (instead  of cash) from the  Portfolio.  The  securities
distributed  in-kind  would be readily  marketable  and would be valued for this
purpose using the same method  employed in calculating the Portfolio's net asset
value per share. If a shareholder  receives  redemption  proceeds  in-kind,  the
shareholder should expect to incur transaction costs upon the disposition of the
securities received in the redemption.

Third-Party Fees and Requirements

     Service  Shares  and  Premier  Shares  are sold and  redeemed  without  any
purchase or redemption charge imposed by the Trust,  although Northern and other
institutions may charge their customers for services provided in connection with
their investments.

     The exercise of voting rights and the delivery to Customers of  shareholder
communications  from  the  Trust  will be  governed  by the  Customers'  account
agreements  with the  Institutions.  Customers  should  read the  Prospectus  in
connection with any relevant  agreement  describing the services  provided by an
Institution and any related requirements and charges, or contact the Institution
at which the Customer maintains its account for further information.

                             PERFORMANCE INFORMATION

     The  performance  of a class of shares of the  Portfolio may be compared to
those of other money market funds with similar  investment  objectives and other
relevant  indices or to  rankings  prepared  by  independent  services  or other
financial or industry publications that monitor the performance of mutual funds.
For  example,  the  performance  of a class of shares  may be  compared  to data
prepared by IBC Financial Data, Inc. or other independent  mutual fund reporting
services.  Performance data as reported in national financial  publications such
as Money Magazine,  Morningstar,  Forbes,  Barron's, The Wall Street Journal and
The New York Times, or in publications of a local or regional  nature,  may also
be used in comparing the performance of a class of shares of the Portfolio.

     From time to time,  the Portfolio  may  advertise  its "yield,"  "effective
yield," "tax-equivalent yield" and "tax-equivalent effective yield." These yield
figures will fluctuate, are based on historical earnings and are not intended to
indicate  future  performance.  "Yield"  refers  to the  net  investment  income
generated by an investment in the Portfolio over a seven-day  period  identified
in the advertisement.  This net investment income is then "annualized." That is,
the amount of net investment income generated by the investment during that week
is assumed  to be  generated  each week over a 52-week  period and is shown as a
percentage of the investment.

     In arriving at quotations as to "yield," the Trust first determines the net
change,  exclusive of capital changes,  during the seven-day period in the value
of a  hypothetical  pre-existing  account  having a balance  of one share at the
beginning  of the  period,  then  divides  such net  change  by the value of the
account at the  beginning  of the period to obtain the base period  return,  and
then multiplies the base period return by 365/7.

     "Effective  yield" is calculated  similarly but, when  annualized,  the net
investment  income  earned by an  investment  in the  Portfolio is assumed to be
reinvested.  The  "effective  yield"  will be  slightly  higher than the "yield"
because of the compounding effect of this assumed  reinvestment.  The "effective
yield" with  respect to the shares of the  Portfolio  is computed by adding 1 to
the base period return  (calculated as above),  raising the sum to a power equal
to 365 divided by 7, and subtracting 1 from the result.

     The  "tax-equivalent   yield"  demonstrates  the  level  of  taxable  yield
necessary to produce an after-tax yield  equivalent to the Portfolio's  tax-free
yield. It is calculated by taking that portion of the seven-day "yield" which is
tax-exempt and adjusting it to reflect the tax savings  associated with a stated
tax rate.  The  "tax-equivalent  current  yield"  will always be higher than the
Portfolio's yield.

     "Tax-equivalent  yield" is computed by dividing the  tax-exempt  portion of
the yield by 1 minus a stated  income tax rate and then  adding the  quotient to
the  taxable  portion  of the  yield,  if  any.  There  may  be  more  than  one
tax-equivalent yield if more than one stated income tax rate is used.

     The  "tax-equivalent  effective  yield"  demonstrates  the level of taxable
yield  necessary to produce an after-tax  yield  equivalent  to the  Portfolio's
tax-free  effective  yield.  It is  calculated  by taking  that  portion  of the
seven-day  "effective yield" which is tax-exempt and adjusting it to reflect the
tax savings  associated  with a stated tax rate. The  "tax-equivalent  effective
yield" will always be higher than the Portfolio's effective yield.

     "Tax-equivalent  effective  yield" is computed by dividing  the  tax-exempt
portion of the  effective  yield by 1 minus a stated income  tax-rate,  and then
adding the quotient to the taxable portion of the effective yield, if any. There
may be more than one  tax-equivalent  effective  yield,  if more than one stated
income tax rate is used.

     Quotations  of yield,  effective  yield,  tax-equivalent  current yield and
tax-equivalent effective yield provided by the Trust are carried to at least the
nearest hundredth of one percent.  Any fees imposed by Northern,  its affiliates
or  correspondent  banks on their  customers in connection  with  investments in
shares of the Portfolio are not  reflected in the  calculation  of yields of the
Portfolio.

     The  Portfolio's  yields may not provide a basis for  comparison  with bank
deposits and other  investments  which provide a fixed yield for a stated period
of time.  The  Portfolio's  yields  fluctuate,  unlike  bank  deposits  or other
investments  which  pay  a  fixed  yield  for  a  stated  period  of  time.  The
annualization  of one  week's  income is not  necessarily  indicative  of future
actual yields. Actual yields will depend on such variables as portfolio quality,
average portfolio maturity, the type of portfolio instruments acquired,  changes
in money market interest rates, portfolio expenses and other factors. Yields are
one basis  investors may use to analyze the Portfolio as compared to other money
market  funds and other  investment  vehicles.  However,  yields of other  money
market funds and other investment  vehicles may not be comparable because of the
foregoing  variables,  and  differences  in the  methods  used in valuing  their
portfolio instruments, computing net asset value and determining yield.

     The  Portfolio  may also  quote  from  time to time  its  total  return  in
accordance with SEC regulations.

     The  yields  and total  returns of the  Portfolio's  Shares are  calculated
separately  from the  calculations  of the yield and total return of the Service
Shares and Premier Shares described in this Additional Statement.

                            AMORTIZED COST VALUATION

     As stated in the  Prospectus,  the Portfolio  seeks to maintain a net asset
value of $1.00 per share and, in this connection,  values its instruments on the
basis of amortized  cost  pursuant to Rule 2a-7 under the 1940 Act.  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,  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 Portfolio would receive if it sold the instrument. During such periods
the yield to investors in the Portfolio  may differ  somewhat from that obtained
in a similar entity which uses available indications as to market value to value
its portfolio instruments. For example, if the use of amortized cost resulted in
a lower (higher)  aggregate  Portfolio  value on a particular day, a prospective
investor  in the  Portfolio  would be able to obtain a somewhat  higher  (lower)
yield and ownership  interest than would result from  investment in such similar
entity and existing  investors would receive less (more)  investment  income and
ownership  interest.   However,  the  Trust  expects  that  the  procedures  and
limitations referred to in the following paragraphs of this section will tend to
minimize the differences referred to above.

     Under Rule 2a-7, the Trust's Board of Trustees,  in supervising the Trust's
operations  and  delegating   special   responsibilities   involving   portfolio
management to Northern,  has established  procedures  that are intended,  taking
into account current market conditions and the Portfolio's investment objective,
to stabilize the net asset value of the Portfolio,  as computed for the purposes
of purchases  and  redemptions,  at $1.00 per share.  The  Trustees'  procedures
include  periodic  monitoring of the difference (the "Market Value  Difference")
between  the  amortized  cost value per share and the net asset  value per share
based upon  available  indications  of market value.  Available  indications  of
market  value  used  by  the  Trust  consist  of  actual  market  quotations  or
appropriate  substitutes which reflect current market conditions and include (a)
quotations  or estimates of market value for  individual  portfolio  instruments
and/or (b) values for  individual  portfolio  instruments  derived  from  market
quotations   relating  to  varying   maturities  of  a  class  of  money  market
instruments.  In the event the Market Value Difference of the Portfolio  exceeds
certain limits or Northern  believes that the Market Value Difference may result
in  material   dilution  or  other  unfair  results  to  investors  or  existing
shareholders, the Trust will take action in accordance with the 1940 Act and the
Trustees  will take  such  steps as they  consider  appropriate  (e.g.,  selling
portfolio  instruments  to  shorten  average  portfolio  maturity  or to realize
capital gains or losses,  reducing or suspending  shareholder  income  accruals,
redeeming  shares  in-kind or  utilizing  a net asset value per share based upon
available  indications of market value which under such circumstances would vary
from $1.00) to  eliminate  or reduce to the extent  reasonably  practicable  any
material dilution or other unfair results to investors or existing  shareholders
which might arise from Market Value Differences.  In particular,  if losses were
sustained by the Portfolio, the number of outstanding shares might be reduced in
order to maintain a net asset value per share of $1.00.  Such reduction would be
effected  by  having  each   shareholder   proportionately   contribute  to  the
Portfolio's  capital the  necessary  shares to restore  such net asset value per
share.  Each shareholder  will be deemed to have agreed to such  contribution in
these circumstances by investing in the Portfolio.

     Rule 2a-7 requires that the Portfolio  limit its investments to instruments
which Northern  determines  (pursuant to guidelines  established by the Board of
Trustees) to present minimal credit risks and which are "Eligible Securities" as
defined by the SEC and described in the Prospectus.  The Rule also requires that
the Portfolio  maintain a dollar-weighted  average portfolio  maturity (not more
than 90 days)  appropriate to its policy of maintaining a stable net asset value
per share and precludes the purchase of any instrument  deemed under the Rule to
have a remaining maturity of more than 397 calendar days. Should the disposition
of a portfolio  security result in a dollar-weighted  average portfolio maturity
of more than 90 days,  the Rule  requires the  Portfolio to invest its available
cash in such a manner as to reduce such maturity to the prescribed limit as soon
as reasonably practicable.

                DESCRIPTION OF SERVICE SHARES AND PREMIER SHARES

     The Trust  Agreement  permits  the  Trust's  Board of  Trustees to issue an
unlimited number of full and fractional shares of beneficial  interest of one or
more  separate  series   representing   interests  in  one  or  more  investment
portfolios.  The Trustees may hereafter create series in addition to the Trust's
nineteen  existing  series,  which represent  interests in the Trust's  nineteen
respective portfolios. The Trust Agreement also permits the Board of Trustees to
classify  or  reclassify  any  unissued  shares  into  classes  within a series.
Pursuant to such  authority,  the Trustees  have  authorized  the issuance of an
unlimited  number of shares of beneficial  interest in three separate classes of
shares of the  Portfolio:  Shares,  Service  Shares  and  Premier  Shares.  This
Additional  Statement (and the related  Prospectus)  relates only to the Service
Shares and Premier Shares of the Portfolio  discussed herein. For information on
the other share classes in the  Portfolio  and on the Trust's  other  investment
portfolios, call the toll-free number on page 1.

     Under the terms of the Trust  Agreement,  each  share of the  Portfolio  is
without par value,  represents an equal proportionate  interest in the Portfolio
with each other  share of its class in the  Portfolio  and is  entitled  to such
dividends and  distributions out of the income belonging to the Portfolio as are
declared by the Trustees. Upon the liquidation of the Portfolio, shareholders of
each class of the  Portfolio  are  entitled  to share pro rata in the net assets
belonging  to that  class  available  for  distribution.  Shares do not have any
preemptive or  conversion  rights.  The right of  redemption is described  under
"About Your Account - Selling Shares and Account Policies and Other Information"
in the  Prospectus  and under  "Amortized  Cost  Valuation"  in this  Additional
Statement.  In  addition,  pursuant to the terms of the 1940 Act, the right of a
shareholder  to redeem  shares and the date of payment by the  Portfolio  may be
suspended  for more than seven days (a) for any period during which the New York
Stock  Exchange is closed,  other than the  customary  weekends or holidays,  or
trading  in  the  markets  the  Portfolio  normally  utilizes  is  closed  or is
restricted as determined by the SEC, (b) during any emergency,  as determined by
the SEC, as a result of which it is not reasonably practicable for the Portfolio
to dispose of  instruments  owned by it or fairly to determine  the value of its
net assets,  or (c) for such other period as the SEC may by order permit for the
protection of the  shareholders of the Portfolio.  The Trust may also suspend or
postpone the  recordation  of the transfer of its shares upon the  occurrence of
any of the  foregoing  conditions.  In  addition,  shares of the  Portfolio  are
redeemable at the  unilateral  option of the Trust if the Trustees  determine in
their  sole  discretion  that  failure to so redeem  may have  material  adverse
consequences to the  shareholders  of the Portfolio.  Service Shares and Premier
Shares when issued as described in the Prospectus are validly issued, fully paid
and  nonassessable,  except as stated  below.  In the  interests  of economy and
convenience,  certificates representing Service Shares and Premier Shares of the
Portfolio are not issued.

     The  proceeds  received  by the  Portfolio  for  each  issue or sale of its
shares, and all net investment income, realized and unrealized gain and proceeds
thereof, subject only to the rights of creditors, will be specifically allocated
to and constitute the underlying assets of that Portfolio. The underlying assets
of the Portfolio will be segregated on the books of account, and will be charged
with the liabilities  and with a share of the general  liabilities of the Trust.
Expenses with respect to the  Portfolio are normally  allocated in proportion to
the net asset value of the Portfolio except where allocations of direct expenses
can otherwise be fairly made.

     Rule  18f-2  under the 1940 Act  provides  that any matter  required  to be
submitted to the holders of the outstanding  voting  securities of an investment
company  such as the Trust  shall not be deemed to have been  effectively  acted
upon unless approved by the holders of a majority of the  outstanding  shares of
the Portfolio,  if it is affected by the matter.  The Portfolio is affected by a
matter  unless it is clear that the interests of the Portfolio in the matter are
substantially  identical as the other  investment  portfolios or that the matter
does not affect any interest of the  Portfolio.  Under the Rule, the approval of
an  investment  advisory  agreement  or any change in a  fundamental  investment
policy would be  effectively  acted upon with respect to the  Portfolio  only if
approved by a majority of the outstanding shares of the Portfolio.  However, the
Rule also provides  that the  ratification  of the  appointment  of  independent
accountants,  the approval of principal  underwriting contracts and the election
of Trustees are exempt from the separate  voting  requirements  stated above. In
addition, shareholders of each of the classes in the Portfolio have equal voting
rights except that only shares of a particular  class of the  Portfolio  will be
entitled  to vote  on  matters  submitted  to a vote of  shareholders  (if  any)
relating to  shareholder  servicing  expenses and transfer  agency fees that are
payable by that class.

     The Trust is not required to hold annual meetings of shareholders  and does
not intend to hold such meetings. In the event that a meeting of shareholders is
held,  each share of the Trust will be entitled,  as  determined by the Trustees
without the vote or consent of  shareholders,  either to one vote for each share
or to one vote for each dollar of net asset value  represented by such shares on
all matters presented to shareholders,  including the election of Trustees (this
method of voting being referred to as "dollar-based  voting").  However,  to the
extent required by the 1940 Act or otherwise determined by the Trustees,  series
and classes of the Trust will vote separately  from each other.  Shareholders of
the Trust do not have cumulative  voting rights in the election of Trustees and,
accordingly,  the holders of more than 50% of the aggregate  voting power of the
Trust  may  elect  all of the  Trustees  irrespective  of the vote of the  other
shareholders.  Meetings  of  shareholders  of the Trust,  or any series or class
thereof,  may be called by the  Trustees,  certain  officers or upon the written
request  of  holders  of 10% or  more  of the  shares  entitled  to vote at such
meeting. The shareholders of the Trust will have voting rights only with respect
to the limited number of matters specified in the Trust Agreement and such other
matters as the Trustees may  determine or may be required by law. The Trust does
not presently intend to hold annual meetings of shareholders  except as required
by the 1940 Act or other  applicable  law. The  Trustees  will  promptly  call a
meeting  of  shareholders  to vote  upon  the  removal  of any  Trustee  when so
requested  in writing by the  record  holders of 10% or more of the  outstanding
shares.  To the extent  required by law,  the Trust will  assist in  shareholder
communications in connection with such a meeting.

     The Trust Agreement  authorizes the Trustees,  without shareholder approval
(except  as stated in the next  paragraph),  to cause the  Trust,  or any series
thereof,  to merge or consolidate  with any corporation,  association,  trust or
other  organization or sell or exchange all or substantially all of the property
belonging  to the Trust,  or any series  thereof.  In  addition,  the  Trustees,
without shareholder approval, may adopt a "master-feeder" structure by investing
substantially  all of the assets of a series of the Trust in the  securities  of
another open-end investment company or pooled portfolio.

     The Trust  Agreement also  authorizes the Trustees,  in connection with the
merger,  consolidation,  termination or other reorganization of the Trust or any
series or class,  to  classify  the  shareholders  of any class into one or more
separate groups and to provide for the different treatment of shares held by the
different groups, provided that such merger, consolidation, termination or other
reorganization  is approved by a majority of the outstanding  voting  securities
(as  defined  in the  1940  Act) of  each  group  of  shareholders  that  are so
classified.

     The Trust  Agreement  permits  the  Trustees  to amend the Trust  Agreement
without a shareholder vote. However, shareholders of the Trust have the right to
vote on any  amendment:  (i) that would  adversely  affect the voting  rights of
shareholders; (ii) that is required by law to be approved by shareholders; (iii)
that would amend the voting provisions of the Trust Agreement;  or (iv) that the
Trustees determine to submit to shareholders.

     The Trust  Agreement  permits the termination of the Trust or of any series
or class of the  Trust  (i) by a  majority  of the  affected  shareholders  at a
meeting of shareholders of the Trust,  series or class; or (ii) by a majority of
the Trustees without  shareholder  approval if the Trustees  determine that such
action is in the best interest of the Trust or its shareholders. The factors and
events that the  Trustees  may take into  account in making  such  determination
include (i) the  inability  of the Trust or any series or class to maintain  its
assets at an appropriate size; (ii) changes in laws or regulations governing the
Trust or any series or class thereof,  or affecting  assets of the type in which
it  invests;  or (iii)  economic  developments  or trends  having a  significant
adverse impact on their business or operations.

     Under the Delaware  Business Trust Act (the "Delaware  Act"),  shareholders
are not  personally  liable for  obligations  of the  Trust.  The  Delaware  Act
entitles  shareholders  of the Trust to the same  limitation  of liability as is
available  to  shareholders  of private  for-profit  corporations.  However,  no
similar  statutory  or  other  authority  limiting  business  trust  shareholder
liability exists in many other states. As a result, to the extent that the Trust
or a shareholder is subject to the  jurisdiction of courts in such other states,
those  courts may not apply  Delaware  law and may subject the  shareholders  to
liability.  To offset this risk,  the Trust  Agreement  (i)  contains an express
disclaimer of  shareholder  liability for acts or  obligations  of the Trust and
requires that notice of such disclaimer be given in each  agreement,  obligation
and  instrument  entered  into or executed by the Trust or its Trustees and (ii)
provides for indemnification out of the property of the applicable series of the
Trust of any shareholder held personally liable for the obligations of the Trust
solely by reason of being or having  been a  shareholder  and not because of the
shareholder's  acts or omissions or for some other reason.  Thus,  the risk of a
shareholder  incurring  financial loss beyond his or her  investment  because of
shareholder  liability is limited to circumstances in which all of the following
factors  are  present:  (1) a court  refuses  to  apply  Delaware  law;  (2) the
liability  arises  under  tort law or,  if not,  no  contractual  limitation  of
liability is in effect;  and (3) the applicable series of the Trust is unable to
meet its obligations.

     The Trust  Agreement  provides  that the Trustees will not be liable to any
person  other  than the Trust or a  shareholder  and that a Trustee  will not be
liable  for  any act as a  Trustee.  However,  nothing  in the  Trust  Agreement
protects a Trustee  against any liability to which he or she would  otherwise be
subject  by reason of  willful  misfeasance,  bad  faith,  gross  negligence  or
reckless disregard of the duties involved in the conduct of his or her office.

     The Trust Agreement provides for indemnification of Trustees,  officers and
agents of the  Trust  unless  the  recipient  is  liable  by  reason of  willful
misfeasance,  bad faith,  gross  negligence or reckless  disregard of the duties
involved in the conduct of such person's  office.  The Trust Agreement  provides
that  each  shareholder,  by  virtue  of  becoming  such,  will  be held to have
expressly  assented and agreed to the terms of the Trust  Agreement  and to have
become a party thereto.

     In  addition  to the  requirements  of Delaware  law,  the Trust  Agreement
provides that a shareholder of the Trust may bring a derivative action on behalf
of the Trust only if the following conditions are met: (a) shareholders eligible
to bring such derivative  action under Delaware law who hold at least 10% of the
outstanding  shares of the Trust, or 10% of the outstanding shares of the series
or class to which such action relates, must join in the request for the Trustees
to commence  such  action;  and (b) the  Trustees  must be afforded a reasonable
amount of time to consider such shareholder request and to investigate the basis
of such claim. The Trust Agreement also provides that no person,  other than the
Trustees,  who is not a  shareholder  of a  particular  series or class shall be
entitled to bring any derivative  action,  suit or other proceeding on behalf of
or with respect to such series or class. The Trustees will be entitled to retain
counsel or other  advisers  in  considering  the merits of the  request  and may
require an undertaking by the shareholders  making such request to reimburse the
Trust  for the  expense  of any such  advisers  in the event  that the  Trustees
determine not to bring such action.

     The  Trustees  may appoint  separate  Trustees  with respect to one or more
series or classes of the Trust's shares (the "Series  Trustees").  To the extent
provided by the Trustees in the appointment of Series Trustees,  Series Trustees
(a) may,  but are not  required  to, serve as Trustees of the Trust or any other
series  or class of the  Trust;  (b) may  have,  to the  exclusion  of any other
Trustee of the Trust, all the powers and authorities of Trustees under the Trust
Agreement with respect to such series or class;  and/or (c) may have no power or
authority  with  respect  to any other  series or class.  The  Trustees  are not
currently considering the appointment of Series Trustees for the Trust.

     As  of  July  30,  1999,  substantially  all  of  the  Trust's  portfolios'
outstanding  shares  were held of  record by  Northern  for the  benefit  of its
customers and the customers of its affiliates and correspondent  banks that have
invested in the  portfolios.  As of the same date,  Northern  possessed  sole or
shared voting and/or  investment power for its customer accounts with respect to
less  than 10% of the  Trust's  outstanding  shares.  As of the same  date,  the
Trust's Trustees and officers as a group owned  beneficially less than 1% of the
outstanding shares of each class of each portfolio.

                     ADDITIONAL INFORMATION CONCERNING TAXES

General

     The Portfolio will elect to be taxed  separately as a regulated  investment
company (a "RIC"). To qualify as a RIC, the Portfolio  generally must distribute
an amount  equal to at least the sum of 90% of its  investment  company  taxable
income and 90% of its net tax-exempt  interest income (net income and the excess
of net short-term  capital gain over net long-term  capital  loss),  if any, for
each  year  (the   "Distribution   Requirement")   and  satisfy   certain  other
requirements.

     The Portfolio must derive at least 90% of its gross income from  dividends,
interest,  certain  payments with respect to securities loans and gains from the
sale or other disposition of stock or securities or foreign currencies,  or from
other  income  derived  with respect to its business of investing in such stock,
securities  or  currencies.  Also,  at the close of each  quarter of the taxable
year, it is generally required that at least 50% of the value of the Portfolio's
assets  must  consist  of cash  and  cash  items,  U.S.  Government  securities,
securities  of other  RICs and  securities  of other  issuers  (as to which  the
Portfolio  has not  invested  more than 5% of the  value of its total  assets in
securities of such issuer and as to which the Portfolio  does not hold more than
10% of the outstanding  voting securities of such issuer),  and no more than 25%
of the value of the  Portfolio's  total assets may be invested in the securities
of any one issuer (other than U.S. Government securities and securities of other
RICs),  or in two or more issuers  which such  Portfolio  controls and which are
engaged in the same or similar  trades or businesses.  The Portfolio  intends to
comply with these RIC requirements.

     If for any taxable year the  Portfolio  was not to qualify as a RIC, all of
its taxable  income would be subject to tax at regular  corporate  rates without
any  deduction  for   distributions   to   shareholders.   In  such  event,  all
distributions  by the  Portfolio  would be taxable to  shareholders  as ordinary
income to the extent of the  Portfolio's  current and  accumulated  earnings and
profits, and would be eligible for the dividends-received  deduction in the case
of corporate shareholders.

     The Internal  Revenue Code  imposes a  nondeductible  4% excise tax on RICs
that fail  currently to distribute an amount equal to specified  percentages  of
their  ordinary  taxable  income and capital gain net income  (excess of capital
gains  over  capital   losses).   The  Portfolio   intends  to  make  sufficient
distributions or deemed distributions of its ordinary taxable income and capital
gain net income each calendar  year to avoid  liability for this excise tax. The
Portfolio also intends to make sufficient  distributions or deemed distributions
each year to avoid liability for corporate  income tax. If the Portfolio were to
fail to make sufficient  distributions,  it could be liable for corporate income
tax and for excise tax.

     The Trust will be  required in certain  cases to withhold  and remit to the
U.S.  Treasury  31% of taxable  dividends  and gross sale  proceeds  paid to any
shareholder (i) who has provided either an incorrect tax  identification  number
or no number at all, (ii) who is subject to backup  withholding  by the Internal
Revenue  Service  for  failure to report the  receipt  of  taxable  interest  or
dividend income properly,  or (iii) who has failed to certify to the Trust, when
required to do so, that he or she is not subject to backup  withholding  or that
he or she is an "exempt recipient."

Special Tax Considerations

     As  described  in the  Prospectus,  the  Portfolio  is  designed to provide
investors  with  Federally  tax-exempt  interest  income.  The  Portfolio is not
intended to  constitute  a balanced  investment  program and is not designed for
investors seeking capital appreciation or maximum tax-exempt income irrespective
of fluctuations in principal.  Shares of the Portfolio would not be suitable for
tax-exempt  institutions or for retirement  plans qualified under Section 401 of
the Code, H.R. 10 plans and individual  retirement  accounts  because such plans
and  accounts  are  generally  tax-exempt  and,  therefore,  would  not gain any
additional benefit from the Portfolio's dividends being tax-exempt. In addition,
the Portfolio may not be an appropriate  investment for persons or entities that
are  "substantial  users" of facilities  financed by private  activity  bonds or
"related  persons"  thereof.  "Substantial  user" is defined under U.S. Treasury
Regulations to include a non-exempt  person which  regularly uses a part of such
facilities  in its trade or  business  and whose  gross  revenues  derived  with
respect to the facilities  financed by the issuance of bonds are more than 5% of
the total revenues derived by all users of such facilities,  which occupies more
than 5% of the usable area of such  facilities or for which such facilities or a
part thereof were specifically constructed,  reconstructed or acquired. "Related
persons" include certain related natural  persons,  affiliated  corporations,  a
partnership and its partners and an S corporation and its shareholders.

     In order for the Portfolio to pay Federal  exempt-interest  dividends  with
respect to any taxable year,  at the close of each taxable  quarter at least 50%
of the aggregate value of the Portfolio must consist of tax-exempt  obligations.
An  exempt-interest  dividend  is any  dividend  or part  thereof  (other than a
capital  gain   dividend)   paid  by  the   Portfolio   and   designated  as  an
exempt-interest  dividend in a written notice mailed to  shareholders  not later
than 60 days  after the close of the  Portfolio's  taxable  year.  However,  the
aggregate  amount of dividends so designated by the Portfolio  cannot exceed the
excess of the amount of interest  exempt from tax under  Section 103 of the Code
received by the Portfolio during the taxable year over any amounts disallowed as
deductions under Sections 265 and 171(a)(2) of the Code. The percentage of total
dividends paid by the Portfolio with respect to any taxable year which qualifies
as  Federal  exempt-interest  dividends  will be the same  for all  shareholders
receiving dividends from the Portfolio with respect to such year.

     Interest on  indebtedness  incurred by a  shareholder  to purchase or carry
shares of the  Portfolio  generally  is not  deductible  for Federal  income tax
purposes  to  the  extent  attributable  to   exempt-interest-dividends.   If  a
shareholder  holds Portfolio shares for six months or less, any loss on the sale
or exchange of those  shares will be  disallowed  to the extent of the amount of
exempt-interest  dividends  earned  with  respect to the  shares.  The  Treasury
Department,  however, is authorized to issue regulations  reducing the six-month
holding  requirement  to a period of not less than the greater of 31 days or the
period between  regular  distributions  for investment  companies that regularly
distribute at least 90% of its net tax-exempt interest.  No such regulations had
been issued as of the date of this Additional Statement.

     Corporate   taxpayers   will  be   required   to  take  into   account  all
exempt-interest  dividends from the Portfolio in determining certain adjustments
for alternative minimum tax purposes.

     The Portfolio will determine annually the percentages of its net investment
income which is exempt from tax, which  constitute an item of tax preference for
purposes of the Federal alternative minimum tax, and which is fully taxable, and
will apply  these  percentages  uniformly  to all  dividends  declared  from net
investment income during that year. These  percentages may differ  significantly
from the actual percentages for any particular day.

     Shareholders  will  be  advised  annually  as to  the  Federal  income  tax
consequences of distributions made by the Portfolios.

Foreign Investors

     Foreign shareholders generally will be subject to U.S. withholding tax at a
rate of 30% (or a lower treaty rate,  if  applicable)  on  distributions  by the
Portfolio of net investment  income,  other ordinary income,  and the excess, if
any, of net  short-term  capital  gain over net  long-term  capital loss for the
year,  regardless of the extent,  if any, to which the income or gain is derived
from  non-U.S.   investments  of  the  Portfolio.   For  this  purpose,  foreign
shareholders include individuals other than U.S. citizens, residents and certain
nonresident aliens, and foreign corporations,  partnerships, trusts and estates.
Different tax consequences may apply to a foreign  shareholder engaged in a U.S.
trade or business or present in the U.S. for 183 days or more in a year. Foreign
shareholders  should  consult their tax advisers  regarding the U.S. and foreign
tax consequences of investing in the Portfolio.

Conclusion

     The foregoing discussion is based on Federal tax laws and regulations which
are  in  effect  on the  date  of  this  Additional  Statement.  Such  laws  and
regulations may be changed by legislative or  administrative  action. 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 the  Prospectus  is not
intended as a substitute for careful tax planning.  Shareholders  are advised to
consult their tax advisers with specific  reference to their own tax  situation,
including the application of state and local taxes.

     Although  the  Portfolio  expects to qualify as a RIC and to be relieved of
all or  substantially  all  Federal  taxes,  depending  upon the  extent  of its
activities  in states and  localities  in which its offices are  maintained,  in
which its  agents  or  independent  contractors  are  located  or in which it is
otherwise deemed to be conducting business,  the Portfolio may be subject to the
tax laws of such states or localities.

SERVICE PLAN

     The Trust,  on behalf of the  Portfolio,  has  adopted a Service  Plan (the
"Plan") with respect to the Service Shares and Premier  Shares.  Under the Plan,
the  Trust,  on behalf  of the  Service  Shares  and the  Premier  Shares of the
Portfolio,  is authorized to pay to Northern a monthly or quarterly  service fee
in  respect  of (i)  administrative  support  services  performed  and  expenses
incurred in connection  with the  Portfolio's  Service Shares and Premier Shares
and (ii)  personal  and account  maintenance  services  performed  and  expenses
incurred in connection with the  Portfolio's  Premier Shares as set forth below.
The fee paid for such services (the "Service Fee") during any one year shall not
exceed:  (i) .33% of the average daily net asset value of the Service  Shares of
the  Portfolio and (ii) .58% of the average daily net asset value of the Premier
Shares of the Portfolio during such period; provided, however, that the fee paid
for personal and account maintenance services and expenses shall not exceed .25%
of the average daily net asset value of the Premier  Shares of the Portfolio for
such period. Northern will determine the amount of the Service Fee to be paid to
one or more brokers,  dealers,  other  financial  institutions or other industry
professionals  (collectively,  "Servicing  Agents")  and the basis on which such
payments  will be  made.  Payments  to a  Servicing  Agent  will be  subject  to
compliance by the Servicing  Agent with the terms of the related Plan  agreement
entered into by the Servicing  Agent.  The Service Fees payable pursuant to this
Plan shall not pertain to services or expenses  which are primarily  intended to
result in the sales of Service Shares and Premier Shares.

     Payments  of the  Service  Fee with  respect to Service  Shares and Premier
Shares will be used to compensate or reimburse Northern and the Servicing Agents
for  administrative  support  services and expenses,  which may include  without
limitation:  (i) acting or arranging for another  party to act, as  recordholder
and nominee of Service Shares and Premier  Shares of the Portfolio  beneficially
owned by Customers;  (ii) establishing and maintaining  individual  accounts and
records with respect to Service Shares and Premier Shares of the Portfolio owned
by Customers;  (iii) processing and issuing  confirmations  concerning  Customer
orders to purchase, redeem and exchange Service Shares and Premier Shares of the
Portfolio; (iv) receiving and transmitting funds representing the purchase price
or redemption  proceeds of Service  Shares and Premier  Shares of the Portfolio;
(v)  processing  dividend  payments  on behalf  of  Customers;  (vi)  forwarding
shareholder communications from the Trust (such as proxy statements and proxies,
shareholder reports,  annual and semi-annual  financial statements and dividend,
distribution  and tax  notices);  (vii)  providing  such  statistical  and other
information  as may be  reasonably  requested by the Trust or necessary  for the
Trust to comply with applicable  Federal or state law; (viii)  facilitating  the
inclusion of the Portfolio in investment,  retirement,  asset  allocation,  cash
management or sweep  accounts or similar  programs or services  offered to their
Customers  or  to  Customers  of  other  Servicing  Agents;   (ix)  facilitating
electronic  or computer  trading  and/or  processing  in the  Portfolio to their
Customers or to Customers of other  Servicing  Agents;  and (x)  performing  any
other similar administrative support services.  Payments of the Service Fee with
respect to the  Premier  Shares  will also be used to  compensate  or  reimburse
Northern and the Servicing Agents for personal and account maintenance  services
and expenses, which may include, without limitation: (i) providing facilities to
answer  inquiries  and  respond  to  correspondence  with  Customers  and  other
investors about the status of their accounts or about other aspects of the Trust
or the Portfolio;  (ii)  assisting  Customers in completing  application  forms,
selecting  dividend and other account options and opening custody  accounts with
the  Servicing  Agents;  (iii)  providing  services  to  Customers  intended  to
facilitate,  or improve  their  understanding  of the benefits and risks of, the
Portfolio to Customers,  including asset allocation and other similar  services;
(iv) acting as liaison  between  Customers  and the Trust,  including  obtaining
information  from the Trust and  assisting  the Trust in  correcting  errors and
resolving  problems;  and  (v)  performing  any  similar  personal  and  account
maintenance services.

     Conflict of interest restrictions (including the Employee Retirement Income
Security Act of 1974) may apply to a Servicing  Agent's  receipt of compensation
paid by the  Trust in  connection  with the  investment  of  fiduciary  funds in
Service or Premier Shares.  Servicing  Agents,  including banks regulated by the
Comptroller of the Currency,  the Federal  Reserve Board or the Federal  Deposit
Insurance Corporation,  and investment advisers and other money managers subject
to the  jurisdiction  of the SEC, the  Department  of Labor or state  securities
commissions,  are urged to consult legal  advisers  before  investing  fiduciary
assets in Service or Premier Shares.

     The Trustees,  including a majority of the Trustees who are not  interested
persons of the Trust and who have no direct or  indirect  financial  interest in
the  operation  of such Plan or the related  agreements,  approved  the Plan and
related  agreement  for the  Portfolio  at a meeting  called for the  purpose of
voting on such Plan and related  agreement on  [_________,  1999].  The Plan and
related  agreement  will remain in effect until April 30, 2000 and will continue
in effect thereafter only if such continuance is specifically  approved annually
by a vote of the Board of Trustees in the manner described above.

     The Plan may not be amended to increase  materially  the amount to be spent
for the services  described therein without approval of the Board of Trustees in
the manner  described  above. The Plan may be terminated as to the Service Class
and the Premier Class at any time by a majority of the non-interested  Trustees.
A service  agreement  may be  terminated  at any time,  without  payment  of any
penalty,  by vote of a majority  of the  Trustees as  described  above or by any
party to the agreement on not more than sixty (60) days'  written  notice to any
other  party  to  the  agreement.   Each  service   agreement   shall  terminate
automatically  if  assigned.  While the Plan is in  effect,  the  selection  and
nomination of those Trustees who are not  interested  persons shall be committed
to the  non-interested  members of the Board of Trustees.  The Board of Trustees
has determined that, in its judgment,  there is a reasonable likelihood that the
Plan will benefit the Portfolio and holders of Service and Premier Shares of the
Portfolio.  The Plan provides  that the Board of Trustees will review,  at least
quarterly,  a  written  report  of the  amount  expended  under the Plan and the
purposes of the expenditures.

                                OTHER INFORMATION

     The  Prospectus  and  this  Additional  Statement  do not  contain  all the
information included in the Registration  Statement filed with the SEC under the
Securities  Act of 1933 with  respect to the  securities  offered by the Trust's
Prospectus.  Certain  portions of the  Registration  Statement have been omitted
from the  Prospectus  and this  Additional  Statement  pursuant to the rules and
regulations of the SEC. The Registration  Statement including the exhibits filed
therewith may be examined at the office of the SEC in Washington, D.C.

     The Portfolio is responsible for the payment of its expenses. Such expenses
include, without limitation, the fees and expenses payable to Northern and First
Data, brokerage fees and commissions, fees for the registration or qualification
of Portfolio  shares under  Federal or state  securities  laws,  expenses of the
organization of the Portfolio,  taxes,  interest,  costs of liability insurance,
fidelity bonds,  indemnification or contribution,  any costs, expenses or losses
arising out of any  liability of or claim for damages or other  relief  asserted
against the Trust for  violation of any law,  legal,  tax and auditing  fees and
expenses,  Service  Fees,  expenses  of  preparing  and  printing  prospectuses,
statements of additional information,  proxy materials,  reports and notices and
the  printing  and  distributing  of the same to the  Trust's  shareholders  and
regulatory authorities,  compensation and expenses of its Trustees, expenses for
industry  organizations such as the Investment Company Institute,  miscellaneous
expenses and extraordinary expenses incurred by the Trust.

     The term  "majority of the  outstanding  shares" of either the Trust or the
Portfolio  means,  with  respect  to  the  approval  of an  investment  advisory
agreement or a change in a fundamental investment  restriction,  the vote of the
lesser of (i) 67% or more of the shares of the Trust or the Portfolio present at
a  meeting,  if the  holders of more than 50% of the  outstanding  shares of the
Trust or the Portfolio are present or  represented  by proxy,  or (ii) more than
50% of the outstanding shares of the Trust or the Portfolio.

     Statements  contained in the Prospectus or in this Additional  Statement as
to the  contents  of  any  contract  or  other  documents  referred  to are  not
necessarily complete, and in each instance reference is made to the copy of such
contract or other document filed as an exhibit to the registration  statement of
which  the  Prospectus  and this  Additional  Statement  form a part,  each such
statement being qualified in all respects by such reference.

                                   APPENDIX A

COMMERCIAL PAPER RATINGS

     A Standard & Poor's ("S&P") commercial paper rating is a current assessment
of the  likelihood of timely  payment of debt having an original  maturity of no
more than 365 days.  The  following  summarizes  the rating  categories  used by
Standard and Poor's for  commercial  paper that is a permissible  investment for
the Portfolios:

     "A-1" - Obligations are rated in the highest  category  indicating that the
     obligor's  capacity to meet its financial  commitment on the  obligation is
     strong.  Within this category,  certain  obligations  are designated with a
     plus sign (+).  This  indicates  that the  obligor's  capacity  to meet its
     financial commitment on these obligations is extremely strong.

     "A-2" - Obligations are somewhat more susceptible to the adverse effects of
     changes in circumstances and economic conditions than obligations in higher
     rating  categories.  However,  the obligor's capacity to meet its financial
     commitment on the obligation is satisfactory.

     Moody's  commercial paper ratings are opinions of the ability of issuers to
repay  punctually  senior debt  obligations  not having an original  maturity in
excess of one year, unless explicitly noted. The following summarizes the rating
categories used by Moody's for commercial paper that is a permissible investment
for the Portfolios:

     "Prime-1" - Issuers (or supporting  institutions)  have a superior  ability
     for repayment of senior  short-term  debt  obligations.  Prime-1  repayment
     ability will often be evidenced by many of the  following  characteristics:
     leading  market  positions in  well-established  industries;  high rates of
     return  on  funds  employed;  conservative  capitalization  structure  with
     moderate  reliance on debt and ample  asset  protection;  broad  margins in
     earnings  coverage  of  fixed  financial  charges  and high  internal  cash
     generation; and well-established access to a range of financial markets and
     assured sources of alternate liquidity.

     "Prime-2" - Issuers (or supporting  institutions) have a strong ability for
     repayment of senior  short-term  debt  obligations.  This will  normally be
     evidenced  by many  of the  characteristics  cited  above  but to a  lesser
     degree.  Earnings  trends and coverage  ratios,  while  sound,  may be more
     subject  to   variation.   Capitalization   characteristics,   while  still
     appropriate,  may be more affected by external conditions.  Ample alternate
     liquidity is maintained.

     The following  summarizes the rating  categories  used by Duff & Phelps for
commercial paper that is a permissible investment for the Portfolios:

     "D-1+" - Debt possesses the highest certainty of timely payment. Short-term
     liquidity,   including   internal   operating   factors  and/or  access  to
     alternative  sources  of funds,  is  outstanding,  and safety is just below
     risk-free U.S. Treasury short-term obligations.

     "D-1" - Debt  possesses very high  certainty of timely  payment.  Liquidity
     factors are excellent and supported by good fundamental protection factors.
     Risk factors are minor.

     "D-1-" - Debt possesses high certainty of timely payment. Liquidity factors
     are strong and  supported  by good  fundamental  protection  factors.  Risk
     factors are very small.

     "D-2" - Debt possesses good certainty of timely payment.  Liquidity factors
     and company  fundamentals  are sound.  Although  ongoing  funding needs may
     enlarge total  financing  requirements,  access to capital markets is good.
     Risk factors are small.

     Duff & Phelps employs three designations,  "D-1+," "D-1" and "D-1-," within
the highest rating category.

     Fitch IBCA  short-term  ratings  apply to debt  obligations  that have time
horizons of less than 12 months for most  obligations,  or up to three years for
U.S. public finance securities.  The following  summarizes the rating categories
used by Fitch IBCA for short-term  obligations that are permissible  investments
for the Portfolios:

     "F1" - Securities  possess the highest  credit  quality.  This  designation
     indicates   the  strongest   capacity  for  timely   payment  of  financial
     commitments  and may have an added "+" to denote any  exceptionally  strong
     credit feature.

     "F2" - Securities possess good credit quality. This designation indicates a
     satisfactory capacity for timely payment of financial commitments,  but the
     margin of safety is not as great as in the case of the higher ratings.

     Thomson BankWatch  short-term  ratings assess the likelihood of an untimely
payment of principal and interest of debt instruments  with original  maturities
of one year or less.  The  following  summarizes  the  ratings  used by  Thomson
BankWatch for short-term  obligations  that are permissible  investments for the
Portfolios:

     "TBW-1" - This designation  represents Thomson BankWatch's highest category
     and indicates a very high  likelihood  that  principal and interest will be
     paid on a timely basis.

     "TBW-2" - This designation  represents Thomson  BankWatch's second- highest
     category and  indicates  that while the degree of safety  regarding  timely
     repayment of  principal  and  interest is strong,  the  relative  degree of
     safety is not as high as for issues rated "TBW-1."

CORPORATE AND MUNICIPAL LONG-TERM DEBT RATINGS

     The  following  summarizes  the  ratings  used by  Standard  &  Poor's  for
corporate  and  municipal  debt  that  are   permissible   investments  for  the
Portfolios:

     "AAA" - An  obligation  rated  "AAA" has the  highest  rating  assigned  by
     Standard & Poor's. The obligor's capacity to meet its financial  commitment
     on the obligation is extremely strong.

     "AA" - An obligation rated "AA" differs from the highest rated  obligations
     only  in  small  degree.  The  obligor's  capacity  to meet  its  financial
     commitment on the obligation is very strong.

     PLUS (+) OR MINUS (-) - The "AA" rating  classification  may be modified by
the addition of a plus or minus sign to show relative  standing within the major
rating categories.

     "r"  -  This  symbol  is  attached  to  the  ratings  of  instruments  with
significant  noncredit  risks. It highlights risks to principal or volatility of
expected returns which are not addressed in the credit rating. Examples include:
obligations  linked  or  indexed  to  equities,   currencies,   or  commodities;
obligations  exposed  to  severe  prepayment  risk - such  as  interest-only  or
principal-only  mortgage  securities;   and  obligations  with  unusually  risky
interest terms, such as inverse floaters.

     The  following  summarizes  the ratings used by Moody's for  corporate  and
municipal long-term debt that are permissible investments for the Portfolios:

     "Aaa" - Bonds are judged to be of the best quality. They carry the smallest
     degree of investment  risk and are  generally  referred to as "gilt edged."
     Interest  payments are protected by a large or by an  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 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 in "Aaa"  securities or  fluctuation  of
     protective  elements  may be of  greater  amplitude  or there  may be other
     elements  present which make the long-term risk appear somewhat larger than
     the "Aaa" securities.

     Con.  (---) - Bonds for which the security  depends upon the  completion of
some act or the fulfillment of some condition are rated conditionally. These are
bonds secured by (a) earnings of projects  under  construction,  (b) earnings of
projects  unseasoned  in  operating  experience,  (c)  rentals  which begin when
facilities are completed, or (d) payments to which some other limiting condition
attaches.  Parenthetical  rating denotes probable credit stature upon completion
of construction or elimination of basis of condition.

     Note:  Moody's  applies  numerical  modifiers  1,  2,  and 3 in the  rating
classification  "Aa". The modifier 1 indicates that the obligation  ranks in the
higher end of its generic rating category;  the modifier 2 indicates a mid-range
ranking;  and the modifier 3 indicates a ranking in the lower end of its generic
rating category.

     The following  summarizes  the long-term debt ratings used by Duff & Phelps
for corporate and municipal long-term debt that are permissible  investments for
the Portfolios:

     "AAA" - Debt is considered to be of the highest  credit  quality.  The risk
     factors are  negligible,  being only slightly more than for risk-free  U.S.
     Treasury debt.

     "AA" - Debt is considered to be of high credit quality.  Protection factors
     are strong.  Risk is modest but may vary slightly from time to time because
     of economic conditions.

     To provide more detailed  indications of credit  quality,  the "AA" and "A"
ratings may be modified by the  addition of a plus (+) or minus (-) sign to show
relative standing within these major categories.

     The following  summarizes  the ratings used by Fitch IBCA for corporate and
     municipal bonds that are permissible investments for the Portfolio:

     "AAA" - Bonds  considered to be investment  grade and of the highest credit
     quality. These ratings denote the lowest expectation of credit risk and 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" - Bonds  considered  to be  investment  grade and of very high  credit
     quality.  These ratings  denote a very low  expectation  of credit risk and
     indicate very strong capacity for timely payment of financial  commitments.
     This capacity is not significantly vulnerable to foreseeable events.

     To provide more  detailed  indications  of credit  quality,  the Fitch IBCA
rating "AA" may be  modified by the  addition of a plus (+) or minus (-) sign to
show relative standing within the major rating category.

     Thomson  BankWatch  assesses  the  likelihood  of an untimely  repayment of
principal or interest  over the term to maturity of long term debt and preferred
stock which are issued by United States commercial  banks,  thrifts and non-bank
banks; non-United States banks; and broker-dealers. The following summarizes the
rating categories used by Thomson BankWatch for long-term debt ratings for those
investments which are permissible investments for the Portfolios:

     "AAA" - This designation  indicates that the ability to repay principal and
     interest on a timely basis is extremely high.

     "AA" - This designation  indicates a very strong ability to repay principal
     and interest on a timely basis,  with limited  incremental risk compared to
     issues rated in the highest category.

     PLUS (+) OR MINUS  (-) The  ratings  "AAA"  and "AA" may  include a plus or
minus sign designation which indicates where within the respective  category the
issue is placed.

Municipal Note Ratings

     A Standard and Poor's  rating  reflects the  liquidity  concerns and market
access  risks  unique  to notes  due in  three  years  or  less.  The  following
summarizes  the ratings used by Standard & Poor's  Ratings  Group for  municipal
notes that are permissible investments for the Portfolios:

     "SP-1" - The issuers of these  municipal notes exhibit a strong capacity to
     pay principal and interest.  Those issues determined to possess very strong
     characteristics are given a plus (+) designation.

     "SP-2" - The issuers of these municipal notes exhibit satisfactory capacity
     to pay principal and interest, with some vulnerability to adverse financial
     and economic changes over the term of the notes.

     Moody's  ratings for state and municipal notes and other  short-term  loans
are  designated  Moody's  Investment  Grade  ("MIG")  and  variable  rate demand
obligations are designated  Variable  Moody's  Investment  Grade ("VMIG").  Such
ratings recognize the differences  between  short-term credit risk and long-term
risk. The following  summarizes the ratings by Moody's Investors  Service,  Inc.
for short-term notes that are permissible investments for the Portfolios:

     "MIG-1"/"VMIG-1" - This designation, denotes best quality. There is present
     strong protection by established cash flows,  superior liquidity support or
     demonstrated broad-based access to the market for refinancing.

     "MIG-2"/"VMIG-2" - This designation,  denotes high quality, with margins of
     protection that are ample although not so large as in the preceding group.

     Fitch IBCA and Duff & Phelps use the  short-term  ratings  described  under
Commercial  Paper Ratings for municipal notes that are  permissible  investments
for the Portfolios.



PART C.

                                OTHER INFORMATION


ITEM 23. EXHIBITS

        The  following   exhibits  are  incorporated   herein  by  reference  to
Post-Effective  Amendment No. 31 to Registrant's  Registration Statement on Form
N-1A  (the  "Registration  Statement")  (Accession  No.   0000950130-96-001086),
Post-Effective  Amendment No. 32 to such Registration  Statement  (Accession No.
0000950130-97-000170),  Post-Effective  Amendment  No.  33 to such  Registration
Statement (Accession No. 0000950130-97-001306),  Post-Effective Amendment No. 34
to   such   Registration   Statement   (Accession   No.   0000950130-97-002471),
Post-Effective  Amendment No. 35 to such Registration  Statement  (Accession No.
0000950131-97-005862),  Post-Effective  Amendment  No.  36 to such  Registration
Statement (Accession No.  0000950131-98-00216),  Post-Effective Amendment No. 37
to   such   Registration   Statement   (Accession   No.    0000950131-98-00512),
Post-Effective  Amendment No. 38 to such Registration  Statement  (Accession No.
0000950131-98-002030)  and Post-Effective  Amendment No. 39 to such Registration
Statement (Accession No. 0000950131-99-000461):

     (a) (1) Agreement and  Declaration  of Trust dated July 1, 1997  (Accession
     No. 0000950131-98-00216).

        (2)  Amendment  No.  1  dated  January  27,  1998 to the  Agreement  and
     Declaration of Trust (Accession No. 0000950131-99-000461).

     (3) Amendment No. 2 dated May 15, 1998 to the Agreement and  Declaration of
     Trust (Accession No. 0000950131-99-000461).

     (b) By-Laws dated July 8, 1997 (Accession No. 0000950131-98-00216).

     (c) Articles IV, V and VII of the Agreement and  Declaration of Trust dated
     July 1, 1997 (Accession No. 0000950131-98-00216).

        (d) (1) Investment  Advisory  Agreement dated March 31, 1998 between the
     Registrant  and  The  Northern  Trust  Company  (the  "Investment  Advisory
     Agreement") (Accession No. 0000950131-99-000461).

     (2)  Addendum  No.  1  dated  March  31,  1998 to the  Investment  Advisory
     Agreement (Accession No. 0000950131-99-000461).

     (3)  Addendum  No.  2  dated  March  31,  1998 to the  Investment  Advisory
     Agreement (Accession No. 0000950131-99-000461).

        (4)  Addendum  No. 3 dated  March 31,  1998 to the  Investment  Advisory
     Agreement. (Accession No. 0000950131-99-000461).

     (5)  Addendum  No.  4  dated  March  31,  1998 to the  Investment  Advisory
     Agreement (Accession No. 0000950131-99-000461).

     (6)  Addendum  No.  5  dated  March  31,  1998 to the  Investment  Advisory
     Agreement (Accession No. 0000950131-99-000461).

     (7)  Addendum  No.  6  dated  March  31,  1998 to the  Investment  Advisory
     Agreement (Accession No. 0000950131-99-000461).

     (8)  Assumption  Agreement  dated April 1, 1998 between The Northern  Trust
     Company and Northern  Trust  Quantitative  Advisors,  Inc.  (Accession  No.
     0000950131-99-000461).

        (e)  (1)  Distribution  Agreement  dated  March  31,  1998  between  the
     Registrant  and  Goldman,  Sachs & Co.  ("Goldman  Sachs")  (Accession  No.
     0000950131-99-000461).

     (f) Not Applicable.

     (g) (1) Custodian  Agreement  dated June 8, 1992 between the Registrant and
     The Northern Trust Company (Accession No. 0000950131-98-002030).

     (2) Addendum No. 1 to the Custodian  Agreement  between the  Registrant and
     The Northern Trust Company (Accession No. 0000950130-96-001086).

     (3) Addendum No. 2 to the Custodian  Agreement  between the  Registrant and
     The Northern Trust Company (Accession No. 0000950130-96-001086).

     (4) Addendum No. 3 to the Custodian  Agreement  between the  Registrant and
     The Northern Trust Company (Accession No. 0000950130-97-002471).

     (5) Addendum No. 4 to the Custodian  Agreement  between the  Registrant and
     The Northern Trust Company (Accession No. 0000950131-97-005862).

     (6) Addendum No. 5 to the Custodian  Agreement  between the  Registrant and
     The Northern Trust Company (Accession No. 0000950131-98-002030).

     (7) Addendum No. 6 to the Custodian  Agreement  between the  Registrant and
     The Northern Trust Company (Accession No. 0000950131-98-002030).

        (8) Addendum No. 7 to the Custodian Agreement between the Registrant and
     The Northern Trust Company (Accession No. 0000950131-99-000461).

     (9) Foreign Custody Agreement between the Registrant and The Northern Trust
     Company (Accession No. 0000950131-98-002030).

     (10) Addendum No. 1 to the Foreign Custody Agreement between the Registrant
     and The Northern Trust Company (Accession No. 0000950130-97-002471).

     (11) Addendum No. 2 to the Foreign Custody Agreement between the Registrant
     and The Northern Trust Company (Accession No. 0000950131-98-002030).

        (12)  Addendum  No.  3 to the  Foreign  Custody  Agreement  between  the
     Registrant    and   The   Northern    Trust    Company    (Accession    No.
     0000950131-99-000461).

     (13) Foreign Custody Monitoring  Agreement dated March 31, 1998 between the
     Registrant    and   The   Northern    Trust    Company    (Accession    No.
     0000950131-99-000461).

     (h) (1) Agreement and Plan of Reorganization between the Registrant and The
     Benchmark Tax-Exempt Fund (Accession No. 0000950131-98-002030).

     (2) Revised and Restated  Transfer  Agency  Agreement dated January 8, 1993
     between the  Registrant  and The  Northern  Trust  Company  (Accession  No.
     0000950131-98-002030).

     (3) Addendum No. 1 to the Revised and Restated  Transfer  Agency  Agreement
     between the  Registrant  and The  Northern  Trust  Company  (Accession  No.
     0000950130-96-001086).

     (4) Addendum No. 2 to the Revised and Restated  Transfer  Agency  Agreement
     between the  Registrant  and The  Northern  Trust  Company  (Accession  No.
     0000950130-96-001086).

     (5) Addendum No. 3 to the Revised and Restated  Transfer  Agency  Agreement
     between the  Registrant  and The  Northern  Trust  Company  (Accession  No.
     0000950130-97-002471).

     (6) Addendum No. 4 to the Revised and Restated  Transfer  Agency  Agreement
     between the  Registrant  and The  Northern  Trust  Company  (Accession  No.
     0000950131-97-005862).

     (7) Addendum No. 5 to the Revised and Restated  Transfer  Agency  Agreement
     between the  Registrant  and The  Northern  Trust  Company  (Accession  No.
     0000950131-98-002030).

        (8) Addendum No. 6 to the Revised and Restated Transfer Agency Agreement
     between the  Registrant  and The  Northern  Trust  Company  (Accession  No.
     0000950131-99-000461).

     (9)  Administration  Agreement  dated March 31, 1998 between the Registrant
     and Goldman Sachs (Accession No. 0000950131-99-000461).

     (10)  Addendum No. 1 dated March 31, 1998 to the  Administration  Agreement
     between   the    Registrant    and    Goldman    Sachs    (Accession    No.
     0000950131-99-000461).

     (11)  Shareholder  Servicing  Plan for Class B, C and D Shares and  Related
     Forms of Servicing Agreement (Accession No. 0000950131-99-000461).

     (12) Service Plan for the Service and Premier Classes of Shares and Related
     Forms of Servicing Agreement (Accession No. 0000950131-99-000461).

     (i)  (1)   Opinion  of   Drinker   Biddle  &  Reath  LLP   (Accession   No.
     0000950131-98-002030).

     (k) None.

     (l) (1)  Subscription  Agreement with Goldman,  Sachs & Co.  (Accession No.
     0000950131-98-002030).

     (2) Amendment No. 1 to  Subscription  Agreement  with Goldman,  Sachs & Co.
     (Accession No. 0000950131-98-002030).

     (3) Amendment No. 2 to  Subscription  Agreement  with Goldman,  Sachs & Co.
     (Accession No. 0000950131-98-002030).

     (4) Amendment No. 3 to  Subscription  Agreement  with Goldman,  Sachs & Co.
     (Accession No. 0000950131-98-002030).

     (m) None.

        (n)  Financial  Data  Schedules  for  the  U.S.  Government  Securities,
     Short-Intermediate  Bond, U.S.  Treasury Index,  Bond,  Intermediate  Bond,
     International Bond,  Balanced,  Equity Index,  Diversified Growth,  Focused
     Growth,  Small Company Index,  International  Growth,  International Equity
     Index,  Government  Select,  Government,  Diversified Assets and Tax-Exempt
     Portfolios. (Accession No. 0000950131-99-000461).

     (o) Amended and  Restated  Plan  pursuant to Rule 18f-3 for  Operation of a
     Multi-Class System (Accession No. 0000950131-98-00512).

     The following  exhibits to the  Registration  Statement are filed  herewith
     electronically pursuant to EDGAR rules:

        (e) (2) Distribution  Agreement dated May 1, 1999 between the Registrant
     and First Data Distributors, Inc.

     (h)  (13)   Co-Administration   Agreement  dated  May  1,  1999  among  the
     Registrant,  Northern Trust Company and First Data Investor Services Group,
     Inc.

     (j) (1) Consent of Drinker Biddle & Reath LLP.

     (2) Consent of Ernst & Young LLP.

ITEM 24. PERSONS CONTROLLED BY OR UNDER COMMON CONTROL WITH REGISTRANT

     Registrant is controlled by its Board of Trustees.


ITEM 25. INDEMNIFICATION

     Section 3 of Article IV of the  Registrant's  Agreement and  Declaration of
Trust provides for  indemnification  of the  Registrant's  Trustees and officers
under certain  circumstances.  A copy of such Agreement and Declaration of Trust
was  filed as  Exhibit 1 to  Post-Effective  Amendment  No.  36 to  Registrant's
Registration Statement on Form N-1A.

        Paragraph 7 of the Investment  Advisory Agreement between the Registrant
and The Northern  Trust  Company  provides for  indemnification  of The Northern
Trust Company or, in lieu thereof, contribution by the Registrant, under certain
circumstances.  A copy of the Investment Advisory Agreement was filed as Exhibit
(d)(1) to Post-Effective Amendment No. 39 to Registrant's Registration Statement
on Form N-1A.

        Article 10 of the  Co-Administration  Agreement  dated May 1, 1999 among
the Registrant,  Northern Trust Company and First Data Investor  Services Group,
Inc.  provides that the  Registrant  will  indemnify  Northern Trust Company and
First Data Investor Services Group, Inc. (each a "Co-Administrator") against all
claims  except  those  resulting  from the  willful  misfeasance,  bad  faith or
negligence  of  such  Co-Administrator,  or  the  Co-Administrator's  breach  of
confidentiality.  A copy of the  Co-Administration  Agreement is filed herein as
exhibit (h)(13).

        Paragraph 3 of the Distribution  Agreement dated May 1, 1999 between the
Registrant  and  First  Data  Distributors,  Inc.  ("FDDI")  provides  that  the
Registrant  will indemnify FDDI against certain  liabilities  relating to untrue
statements  or  omissions  of material  fact  except  those  resulting  from the
reliance  on  information  furnished  to the  Registration  by  FDDI,  or  those
resulting  from the willful  misfeasance,  bad faith or  negligence  of FDDI, or
FDDI's breach of confidentiality.  A copy of the Distribution Agreement is filed
herein as exhibit (e)(2).

        A mutual fund and trustee and officer  liability policy purchased by the
Registrant insures the Registrant and its Trustees and officers,  subject to the
policy's  coverage limits and exclusions and varying  deductibles,  against loss
resulting  from  claims  by reason of any act,  error,  omission,  misstatement,
misleading statement, neglect or breach of duty.

ITEM 26. BUSINESS AND OTHER CONNECTIONS OF INVESTMENT ADVISER

     The Northern  Trust Company,  Registrant's  investment  adviser,  is a full
service  commercial  bank and also  provides a full range of trust and fiduciary
services. Set forth below is a list of all of the directors, senior officers and
those officers  primarily  responsible for Registrant's  affairs of The Northern
Trust  Company  and,  with  respect to each such  person,  the name and business
address of the company (if any) with which such person has been connected at any
time since  November 30, 1996,  as well as the capacity in which such person was
connected.

     Northern  Trust  Quantitative  Advisors,   Inc.  ("NTQA")  is  an  indirect
wholly-owned subsidiary of Northern Trust Corporation. The list required by this
Item 26 of officers and directors of NTQA,  together with  information as to any
other  business,  profession,  vocation or employment  of a  substantial  nature
engaged  in by such  officers  and  directors  during  the  past two  years,  is
incorporated  by  reference  to  Schedules  A and D of Form  ADV,  filed by NTQA
pursuant to the Investment Advisers Act of 1940 (SEC File No. 801-333580).
<TABLE>
<CAPTION>
<S> <C>                                   <C>                                     <C>
NAME AND POSITION                                                           NAME AND PRINCIPAL
CONNECTION
WITH INVESTMENT                                                             BUSINESS ADDRESS OF
WITH OTHER
ADVISER                                    OTHER COMPANY                                COMPANY

Duane L. Burnham                            Northern Trust Corporation                    Director
Director                                    50 S. LaSalle Street
                                            Chicago, IL 60605

AME AND POSITION                                                           NAME AND PRINCIPAL
CONNECTION
WITH INVESTMENT                                                             BUSINESS ADDRESS OF
WITH OTHER
ADVISER                                    OTHER COMPANY                                COMPANY

                                            Abbott Laboratories                                    Chairman     and
Chief
                                            150 Field Drive                                        Executive
Officer
                                            Suite 160
                                            Lake Forest, IL

                                            NCR Corporation                               Director
                                            1700 S. Patterson Blvd
                                            Dayton, OH 45479

                                            Sara Lee Corporation                          Director
                                            3 First National Plaza
                                            Chicago, IL 60602

Dr. Dolores E. Cross                        Northern Trust                                Director
Director                                    Corporation
                                            50 S. LaSalle Street
                                            Chicago, IL 60675
                                                                                                          Chicago
     State University                      Former
                                           95th Street at King Drive                      President
                                           Chicago, IL 60643

                                           General Electric Company GE Fund               Former
                                           3135 Easton Turnpike                           President
                                           Fairfield, CT 06432

                                           The Graduate School and University Center      Professor
                                           GE Fund Distinguished                          of
                                           The City University of NY                      Leadership
                                           33 W 42nd St. - Room 1400N                     and
                                           New York, NY 10036                             Diversity


Susan Crown                                Northern Trust Corporation                     Director
Director                                   50 S. LaSalle Street
                                           Chicago, IL 60675

                                           Henry Crown and Company                        Vice
                                           222 N. LaSalle St., Ste 2000                   President
                                           Chicago, IL 60601

                                           Baxter International, Inc.                     Director
                                           One Baxter Parkway
                                           Deerfield, IL 60015

                                           Illinois Tool Works, Inc.                      Director
                                           3600 W. Lake Avenue
                                           Glenview, IL 60025

John R. Goodwin                            NTQA                                           Director,        Managing
Senior Vice President                      50 S. LaSalle Street
Chief Director                             Chicago, IL 60606                                      Investment
Officer

Robert S. Hamada                           Northern Trust Corporation                     Director
Director                                   50 S. LaSalle Street
                                           Chicago, IL 60675

                                           The University of Chicago                      Dean and
                                           Graduate School of Business                    Edward
                                           1101 East 58th Street                          Eagle
                                           Chicago, IL 60637                              Brown

                                                                                          Distinguished
                                                                                          Service Professor of
                                                                                          Finance

                                              NAME AND PRINCIPAL
NAME AND POSITION                                                           NAME AND PRINCIPAL
CONNECTION
WITH INVESTMENT                                                             BUSINESS ADDRESS OF
WITH OTHER
ADVISER                                    OTHER COMPANY                                COMPANY

                                           A.M. Castle & Co.                              Director
                                           3400 North Wolf Road
                                           Franklin, IL 60131

                                           Chicago Board of Trade                         Director
                                           141 West Jackson Boulevard
                                           Chicago, IL 60674

Barry G. Hastings                          Northern Trust Corporation                     Operating
President & Chief                          50 S. LaSalle Street                           Director
President, Chief Officer                   Chicago, IL 60675                                       Operating
Officer &
Director

                                           Northern Trust                                 Director
                                           Securities, Inc.
                                           50 S. LaSalle Street
                                           Chicago, IL 60675

                                           Northern Trust of California Corporation       Director
                                           355 S. Grand Avenue
                                           Los Angeles, CA 90017

                                           Northern Trust of Florida Corporation          Vice Chairman of  700
                                           Brickell Avenue                                the Board &
                                           Miami, Fl 33131                                Director

                                           Nortrust Realty Mgmt., Inc.                    Director
                                           50 S. LaSalle Street, 38th Fl.
                                           Chicago, IL 60675

Robert A. Helman                           Northern Trust                                 Director
Director                                   Corporation
                                           50 S. LaSalle Street
                                           Chicago, IL 60675

                                           Mayer, Brown & Platt                           Partner
                                           190 S. LaSalle St.,38th Fl.
                                           Chicago, IL 60603

                                            Chicago Stock Exchange
                                            One Financial Plaza
                                            440 S. LaSalle St.
                                            Chicago, IL 60605

                                            Brambles USA, Inc.
                                            400 N. Michigan Avenue
                                            Chicago, IL 60611

                                            Zenith Electronics
                                            1000 Milwaukee Avenue
                                            Glenview, IL 60025

Arthur L. Kelly                             Northern Trust Corporation                    Director
Director                                    50 S. LaSalle Street
                                            Chicago, IL 60675

                                            KEL Enterprises L.P.                          Managing Partner
                                            Two First National Plaza
                                            20 S. Clark Street
                                            Suite. 2222
                                            Chicago, IL 60603

NAME AND POSITION                                                           NAME AND PRINCIPAL
CONNECTION
WITH INVESTMENT                                                             BUSINESS ADDRESS OF
WITH OTHER
ADVISER                                    OTHER COMPANY                                COMPANY

                                            Bayerische Motoren                            Director
                                            Werke(BMW) A.G. BMW Haus
                                            Petuelring 130
                                            Postfach 40 02 40
                                            D-8000
                                            Munich 40 Germany

                                            A.G. Deere & Company                          Director
                                            John Deere Rd.
                                            Moline, IL 61265

                                            Nalco Chemical                                Director
                                            Company
                                            One Nalco Center
                                            Naperville, IL
                                           60563-1198

                                            Snap-on Incorporated                          Director
                                            2801 80th Street
                                            Kenosha, WI 53140

Arthur L. Kelly                             Tejas Gas Corporation                         Director
                                            1301 McKinney St.
                                            Houston, TX 77010

                                            Thyssen Industrie AG                          Director
                                            Am Thyssenhaus 1
                                            45128 Essen Germany

Frederick A. Krehbiel                       Molex Incorporated                            Director
Director                                    2222 Wellington Court
                                            Lisle, IL 60532-1682

                                            Nalco Chemical Company                                 Chairman,    CEO
and
                                            One Nalco Center                              Director
                                            Naperville, IL 60563-1198

                                            Tellabs, Inc.                                 Director
                                            4951 Indiana Avenue
                                            Lisle, IL 60532

Roger W. Kushla                             The Northern Trust                            Director
Senior Vice President                       Company of New York
                                            40 Broad Street, 8th Fl.
                                            New York, NY 10004

Robert A. LaFleur                           None
Senior Vice President

Thomas L. Mallman                           None
Senior Vice President

James J. Mitchell, III                      The Northern Trust                            Director
Executive Vice                              Company of New York
President                                   40 Broad Street, 8th Fl.
                                            New York, NY 10004

                                            Northern Trust                                Director
                                            Corporation
                                            50 S. LaSalle Street
                                            Chicago, IL 60675

William G. Mitchell                         Northern Trust Corporation                    Director
Director                                    50 South LaSalle Street
                                            Chicago, IL 60675

NAME AND POSITION                                                           NAME AND PRINCIPAL
CONNECTION
WITH INVESTMENT                                                             BUSINESS ADDRESS OF
WITH OTHER
ADVISER                                    OTHER COMPANY                                COMPANY

                                            The Interlake Corporation                     Director
                                            7701 Harger Road
                                            Oak Brook, IL
                                           60521-1488

                                            Peoples Energy                                Director
                                            Corporation
                                            122 South Michigan Ave
                                            Chicago, IL 60603

                                            The Sherwin-Williams                          Director
                                            Company
                                            101 Prospect Avenue, N.W.
                                            Cleveland, OH 44115-1075

Edward J. Mooney                            Northern Trust Corporation                    Director
Director                                    50 S. LaSalle
                                            Chicago, IL 60675

                                            Nalco Chemical Company                                 Chairman, Chief
                                            One Nalco Center                                       Executive
Officer,
                                            Naperville, IL                                         President      &
Director
                                            60563-1198

                                            Morton International, Inc.                    Director
                                            100 North Riverside Plaza
                                            Chicago, IL 60605

                                            FMC Corporation                               Director
                                            200 E. Randolph Drive
                                            Chicago, IL 60601

William A. Osborn                           Northern Trust Corporation                    Director
Chairman and Chief Executive Officer        50 S. LaSalle Street
                                            Chicago, IL 60675

                                            Northern Trust of California Corporation      Director
                                            355 S. Grand Avenue                           and Former
                                            Los Angeles, CA 90017                         Chairman of the Board


                                           Northern Trust Bank of                         Director
                                           California N.A.
                                           355 S. Grand Avenue
                                           Los Angeles, CA 90017

                                           Nortrust Realty                                Director
                                           Management Inc.
                                           50S. LaSalle Street
                                           Chicago, IL 60675

                                           Northern Futures Corporation                   Director
                                           50 S. LaSalle Street
                                           Chicago, IL 60675

Sheila A. Penrose                          Northern Trust Global                          Director
President - Corporate                      Advisors, Inc.
and Institutional                          29 Federal Street
Services                                   Stamford, CT 06901

                                           Nalco Chemical Company                         Director
                                           One Nalco Center
                                           Naperville, IL 60563-1198

NAME AND POSITION                                                           NAME AND PRINCIPAL
CONNECTION
WITH INVESTMENT                                                             BUSINESS ADDRESS OF
WITH OTHER
ADVISER                                    OTHER COMPANY                                COMPANY

                                           Northern Trust Retirement                      Manager
                                           Consulting, LLC
                                           400 Perimeter Center Terrace
                                           Suite 850
                                           Atlanta, GA 30346

                                                                                          Northern            Trust
Corporation                                                                               Director and    50 S.
LaSalle Street                                                                            Executive Vice
                                           Chicago, IL 60675                              President
                                           NTQA                                           Director
                                           50 South LaSalle Street
                                           Chicago, IL 60675

Perry R. Pero                              Northern Futures Corporation                   Director
Senior Executive Vice President, Chief     50 S. LaSalle Street
Financial Officer                          Chicago IL 60675

                                           Northern Investment                            Former Chairman,
                                           Corporation                                    President and
                                           50 S. LaSalle Street                           Director, Former
                                           Chicago, IL 60675                              Treasurer

                                           Northern Trust Global                          Director
                                           Advisors, Inc
                                           29 Federal Street
                                           Stamford ST 06901

                                           Northern Trust                                 Director
                                           Securities, Inc.
                                           50 South LaSalle Street
                                           Chicago, IL 60675

                                           Nortrust Realty                                Director
                                           Management, Inc.
                                           50 South LaSalle Street
                                           Chicago, IL 60675

                                           Northern Trust Corporation                     Director
                                           50 S. LaSalle Street
                                           Chicago, IL 60675

                                           NTQA                                           Director
                                           50 South LaSalle Street
                                           Chicago, IL 60675

Stephen N. Potter                          NTQA                                           Director,   Senior   Vice
President                                  50 S. LaSalle Street                           Managing
                                           Chicago, IL 60675                              Director

Peter L. Rossiter                          Schiff, Hardin & Waite                         Former Partner
Executive Vice                             7200 Sears Tower
President and General                      Chicago, IL 60606
Counsel

                                           Tanglewood Bancshares Inc.                     Former Vice
                                           600 Bering Dr.                                 President
                                           Houston, TX 77057                              and Director


                                           Consolidated Communications Inc.               Director
                                           Illinois Consolidated
                                           Telephone Company
                                           121 S. 17th Street
                                           Mattoon, IL 61938

                                           Northern Trust Corporation                     Executive Vice
                                           50 South LaSalle Street                        President
                                           Chicago, IL 60675                              and General Counsel

NAME AND POSITION                                                           NAME AND PRINCIPAL
CONNECTION
WITH INVESTMENT                                                             BUSINESS ADDRESS OF
WITH OTHER
ADVISER                                    OTHER COMPANY                                COMPANY

Harold B. Smith                            Northern Trust Corporation                     Director
Director                                   50 South LaSalle Street
                                           Chicago, IL 60675

                                           Illinois Tool Works Inc.                       Chairman of the
                                           3600 West Lake Ave.                           Executive Committee
                                           Glenview, IL 60025-5811

                                           W.W. Grainger, Inc.                            Director
                                           5500 West Howard Street
                                           Skokie, IL 60077

                                           Northwestern Mutual Life Insurance Co.         Trustee
                                           720 East Wisconsin Avenue
                                           Milwaukee, WI 53202

William D. Smithburg                       The Quaker Oats Company                        Retired Chairman
Director                                   321 North Clark Street
                                           Chicago, IL 60610

                                           Northern Trust Corporation                     Director
                                           50 South LaSalle Street
                                           Chicago, IL 60675

                                           Abbott Laboratories                            Director
                                           One Abbott Park Road
                                           Abbott Park, IL 60675

                                           Corning Incorporated                           Director
                                           Corning, NY 14831

                                           Prime Capital Corporation                      Director
                                           10275 W. Higgins Road
                                           Suite 200
                                           Rosemont, IL 60018

James M. Snyder                            NTQA                                           Director
Chairman, CEO and                          50 South LaSalle Street
Executive Vice                             Chicago, IL 60675
President

Bide L. Thomas                             Northern Trust Corporation                     Director
Director                                   50 South LaSalle Street
                                           Chicago, IL 60674

                                           MYR Group Inc.                                 Director
                                           (formerly L.E. Myers Company)
                                           2550 W. Golf Rd.
                                           Rolling Meadows, IL 60008

                                           R.R. Donnelley & Sons Company                  Director
                                           77 West Wacker Drive
                                           Chicago, IL 60601

Stephen B. Timbers                         Northern Trust Corporation                     Executive Vice
President - NTGI                           50 S. LaSalle Street                           President
                                           Chicago, IL 60675

                                           Northern Trust Global Advisors, Inc.           Executive Vice
                                           29 Federal Street                              President
                                           Stamford, CT 06901

                                           LTV Steel Co.                                  Director
                                           200 Public Square
                                           Cleveland, OH 44114-2308

                                           Zurich-Kemper Investments                      Former President
                                           222 S. Riverside Plaza                         and CEO
                                           Chicago, IL 60606

NAME AND POSITION                                                           NAME AND PRINCIPAL
CONNECTION
WITH INVESTMENT                                                             BUSINESS ADDRESS OF
WITH OTHER
ADVISER                                    OTHER COMPANY                                COMPANY

Jeffrey H. Wessel                          NTQA                                           President and
Executive Vice President                   50 South LaSalle                               Director
                                            Chicago, IL 60675

</TABLE>

ITEM 27. PRINCIPAL UNDERWRITERS

        (a) First Data Distributors,  Inc. (the  "Distributor"),  a wholly owned
     subsidiary  of First Data  Investor  Services  Group,  Inc. and an indirect
     wholly owned subsidiary of First Data Corporation,  acts as distributor for
     Northern Institutional Funds pursuant to a distribution agreement dated May
     1, 1999.  The  Distributor  also acts as  underwriter  for ABN AMRO  Funds,
     Alleghany Funds, BT Insurance Funds Trust,  First Choice Funds Trust,  LKCM
     Funds,  The Galaxy  Fund,  The Galaxy VIP Fund,  Galaxy  Fund II, IBJ Funds
     Trust,  ICM Series  Trust,  Panorama  Trust,  Undiscovered  Managers  Fund,
     Forward  Funds,  Inc.,  Light Index  Funds,  Inc.  Weiss Peck & Greer Funds
     Trust, Weiss Peck & Greer International Fund, WPG Growth Fund, WPG Growth &
     Income Fund, WPG Tudor Fund, RWB/WPG U.S. Large Stock Fund,  Tomorrow Funds
     Retirement Trust, The Govett Funds,  Inc., IAA Trust Growth Fund, Inc., IAA
     Trust Asset  Allocation  Fund,  Inc., IAA Trust Tax Exempt Bond Fund, Inc.,
     IAA Trust Taxable Fixed Income Series Fund,  Inc.,  Matthews  International
     Funds, MCM Funds, Metropolitan West Funds, Smith Breeden Series Fund, Smith
     Breeden Trust,  Stratton Growth Fund, Inc.,  Stratton Monthly Dividend REIT
     Shares,  Inc.,  The Stratton  Funds,  Inc.,  Trainer,  Wortham First Mutual
     Funds,   Wilshire  Target  Funds,  Inc.  and  Worldwide  Index  Funds.  The
     Distributor is registered with the Securities and Exchange  Commission as a
     broker-dealer  and is a member of the National  Association  of  Securities
     Dealers, Inc.

     (b) The  information  required  by this Item  27(b)  with  respect  to each
     director,  officer,  or  partner  of  First  Data  Distributors,   Inc.  is
     incorporated  by  reference  to  Schedule  A of Form BD filed by First Data
     Distributors,  Inc. with the Securities and Exchange Commission pursuant to
     the Securities Act of 1934 (File No. 8-45467).

     (c) Not Applicable.

ITEM 28. LOCATION OF ACCOUNTS AND RECORDS

        The Agreement and Declaration of Trust,  By-laws and minute books of the
Registrant are in the physical possession of First Data Investor Services Group,
Inc., 101 Federal Street,  Boston,  Massachusetts  02110.  Records for the First
Data  Distributors,  Inc., the distributor,  are located at 4400 Computer Drive,
Westborough,  Massachusetts 01581. All other accounts, books and other documents
required to be maintained  under Section 31(a) of the Investment  Company Act of
1940 and the Rules promulgated  thereunder are in the physical possession of The
Northern Trust Company, 50 S. LaSalle Street, Chicago,  Illinois 60675 and NTQA,
50 S. LaSalle Street, Chicago IL 60690.

ITEM 29. MANAGEMENT SERVICES

Not Applicable.


ITEM 30. UNDERTAKINGS

Not Applicable.


                                   SIGNATURES

          Pursuant to the  requirements  of the  Securities  Act of 1933 and the
Investment Company Act of 1940, the Registrant has duly caused this registration
statement  to be  signed  on its  behalf  by  the  undersigned,  thereunto  duly
authorized,  in the City of Boston and  Commonwealth of Massachusetts on the 6th
day of August, 1999.

NORTHERN INSTITUTIONAL FUNDS

By:        /s/ Linda J. Hoard
           Linda J. Hoard
           Secretary

     Pursuant  to  the   requirements  of  the  Securities  Act  of  1933,  this
registration  statement  has been signed below by the  following  persons in the
capacities and on the date indicated.
<TABLE>
<CAPTION>
<S>     <C>                                  <C>                             <C>

           Name                                 Title                            Date

/s/ Jylanne Dunne                            President                     August 6, 1999
Jylanne Dunne

/s/ Brian R. Curran                           Treasurer                    August 6, 1999
Brian R. Curran

WILLIAM H. SPRINGER*                          Trustee                      August 6, 1999
William H. Springer

RICHARD G. CLINE*                             Trustee                      August 6, 1999
Richard G. Cline

EDWARD J. CONDON*                             Trustee                      August 6, 1999
Edward J. Condon

JOHN W. ENGLISH*                              Trustee                      August 6, 1999
John W. English

SANDRA P. GUTHMAN*                            Trustee                      August 6, 1999
Sandra P. Guthman

FREDERICK T. KELSEY*                          Trustee                      August 6, 1999
Frederick T. Kelsey

RICHARD P. STRUBEL *                          Trustee                      August 6, 1999
Richard P. Strubel
</TABLE>

*By: /s/ Linda J. Hoard                                         August 6, 1999
       Linda J. Hoard
       Attorney-in-fact

                          NORTHERN INSTITUTIONAL FUNDS

                                power of attorney

     KNOW ALL PERSONS BY THESE PRESENTS,  that the undersigned,  being a Trustee
of Northern  Institutional  Funds, a business trust  organized under the laws of
The State of Delaware (the  "Trust"),  does hereby make,  constitute and appoint
Richard Rose,  Brian Curran,  Linda Hoard and Teresa  Hamlin,  and each of them,
attorneys-in-fact and agents of the undersigned with full power and authority of
substitution and resubstitution,  in any and all capacities,  to execute for and
on  behalf  of the  undersigned  any  and  all  filings  and  amendments  to the
Registration  Statement on Form N-1A relating to the shares of the Trust and any
other documents and instruments  incidental thereto, and to deliver and file the
same, with all exhibits thereto, and all documents and instruments in connection
therewith,  with the  Securities  and Exchange  Commission,  granting  unto said
attorneys-in-fact  and agents,  and each of them, full power and authority to do
and perform each and every act and thing that said attorneys-in-fact and agents,
and each of them,  deem advisable or necessary to enable the Trust to effectuate
the intents and purposes hereof,  and the undersigned  hereby fully ratifies and
confirms all that said attorneys-in-fact and agents, of any of them, or their or
his or her  substitute  or  substitutes,  shall do or cause to be done by virtue
hereof.

     IN WITNESS  WHEREOF,  the undersigned has subscribed his name this 21st day
of April, 1999.

                                                     /s/ Edward J. Condon, Jr.
                                                     Edward J. Condon, Jr.

                                                     /s/ Richard Gordon Cline
                                                     Richard Gordon Cline

                                                     /s/ John W. English
                                                     John W. English

                                                     /s/ Sandra Polk Guthman
                                                     Sandra Polk Guthman

                                                     /s/ Frederick T. Kelsey
                                                     Frederick T. Kelsey

                                                     /s/ William H. Springer
                                                     William H. Springer

                                                     /s/ Richard P. Strubel
                                                     Richard P. Strubel



                                  EXHIBIT INDEX
<TABLE>
<CAPTION>
<S><C>          <C>

Exhibit No.     Description

(e)(2)          Distribution Agreement dated May 1, 1999 between the Registrant and First Data Distributors, Inc.

(h)(13)         Co-Administration  Agreement  dated May 1, 1999 among the  Registrant,  Northern  Trust  Company and
                First Data Investor Services Group, Inc.

(j)(1)          Consent of Drinker Biddle & Reath LLP.

   (2)          Consent of Ernst & Young LLP.
</TABLE>



                                                                  Exhibit (e)(2)

                             DISTRIBUTION AGREEMENT

     THIS AGREEMENT is made as of this 1st day of May, 1999 (the "Agreement") by
and between  Northern  Institutional  Funds (the  "Fund"),  a Delaware  business
trust, and First Data Distributors,  Inc. (the  "Distributor"),  a Massachusetts
corporation.

     WHEREAS,  the  Fund is  registered  as an  open-end  management  investment
company under the  Investment  Company Act of 1940, as amended (the "1940 Act"),
and is currently  offering  shares of  beneficial  interest  (such shares of all
series and classes are hereinafter called the "Shares"),  representing interests
in  investment  portfolios  of the Fund  identified  on  Schedule A hereto  (the
"Portfolios")  which are registered with the Securities and Exchange  Commission
(the "SEC")  pursuant  to the Fund's  Registration  Statement  on Form N-1A (the
"Registration Statement"); and

     WHEREAS,  the Fund desires to retain the Distributor as distributor for the
Portfolios  to  provide  for the  sale and  distribution  of the  Shares  of the
Portfolios identified on Schedule A and for such additional classes or series as
the Fund may issue,  and the  Distributor  is prepared to provide such  services
commencing on the date first written above.

     NOW THEREFORE,  in  consideration  of the premises and mutual covenants set
forth herein and intending to be legally  bound hereby the parties  hereto agree
as follows:

1.  Service as Distributor

     1.1 The Fund hereby  appoints the  Distributor as exclusive  distributor of
the  Shares  covered  by the  Registration  Statement  then in effect  under the
Securities  Act of 1933,  as amended (the "1933 Act"),  on the terms and for the
periods  set  forth in this  Agreement.  The  Distributor  hereby  accepts  such
appointment  and agrees to render the  services and perform the duties set forth
in this Agreement without  compensation.  The Distributor will have no liability
for payment for the purchase of Shares by  unaffiliated  investors sold pursuant
to this Agreement or with respect to redemptions or repurchases of Shares.

     1.2 The  Distributor  agrees to sell Shares of each of the  Portfolios,  as
agent,  from time to time during the term of this  Agreement at the Shares' then
current net asset value (with any purchase price  adjustments,  as  applicable).
The net asset value of the Shares shall be determined in the manner  provided in
the then current prospectus and statement of additional  information relating to
the  Shares  (collectively,   the  "Prospectus"  and  "Statement  of  Additional
Information"),  and when determined  shall be applicable to all  transactions as
provided  in the  Prospectus.  The  net  asset  value  of the  Shares  shall  be
calculated  by the  Fund  or by  another  entity  on  behalf  of the  Fund.  The
Distributor  shall have no duty to inquire into, or liability  for, the accuracy
of the net asset value per Share as calculated.

     1.3 The Distributor agrees to use appropriate efforts to solicit orders for
the sale of the Shares.  The  Distributor  shall,  at its own  expense,  finance
appropriate  activities  which are  primarily  intended to result in the sale of
Shares,  including,  but not limited to, the distribution  services set forth in
Schedule B to this Agreement. It is contemplated that the Distributor will enter
into selling  agreements with securities  dealers,  financial  institutions  and
other  industry  professionals,  such as investment  advisers,  accountants  and
estate planning firms, with respect to the offering of Shares to the public. The
Distributor  will  require each dealer with whom the  Distributor  has a selling
agreement to conform to the applicable provisions of the Registration Statement,
with respect to the public  offering  price of the Shares,  and the  Distributor
shall not cause the Fund to withhold  the  placing of  purchase  orders so as to
make a profit thereby.

     1.4 The Fund understands that the Distributor is now, and may in the future
be, the  distributor  of the shares of several  investment  companies  or series
(collectively,  the "Investment Entities"), including Investment Entities having
investment  objectives  similar  to those of the  Portfolios.  The Fund  further
understands that investors and potential  investors in the Portfolios may invest
in  shares  of  such  other  Investment  Entities.  The  Fund  agrees  that  the
Distributor's duties to such Investment Entities shall not be deemed in conflict
with its duties to the Fund under this Section 1.4.

     1.5 The Distributor  shall not utilize any materials in connection with the
sale or  offering  of Shares  except  the Fund's  then  current  Prospectus  and
Statement of Additional  Information  and such other materials as the Fund shall
provide or approve.  The Fund agrees to furnish the Distributor  with sufficient
copies of any and all  communications  with the public or other  materials which
the Fund intends to use in connection any sales of Shares,  in adequate time for
the  Distributor to file and clear such  materials  with the proper  authorities
before they are put in use. The Distributor and the Fund may agree that any such
material does not need to be filed subsequent to distribution.  In addition, the
Fund agrees not to use any such materials until so filed and cleared for use, if
required, by appropriate authorities as well as by the Distributor.

     1.6 All  activities by the  Distributor  and its agents and  employees,  as
distributor  of the Shares,  shall comply with all  applicable  laws,  rules and
regulations,  including,  without limitation,  all rules and regulations made or
adopted by the SEC or the National Association of Securities Dealers.

     1.7 The Distributor will transmit any orders received by it for purchase or
redemption of the Shares to the transfer agent for the Fund.

     1.8 Whenever in its judgment such action is warranted, the Fund may decline
to accept any orders  for,  or make any sales of, the Shares  until such time as
the Fund deems it  advisable  to accept such orders and to make such sales,  and
the Fund shall notify the Distributor promptly of any such determination.

     1.9 The Fund agrees to execute any and all documents and to furnish any and
all  information  and  otherwise  to take all  actions  that  may be  reasonably
necessary in connection  with the  qualification  of the Shares for sale in such
states where Shares are offered for sale. The Fund shall notify the  Distributor
in writing of the states in which the Shares are to be sold and shall notify the
Distributor  in  writing  of any  changes to the  information  contained  in the
previous notification.

     1.10 The Fund shall furnish from time to time,  for use in connection  with
the sale of the Shares, such information with respect to the Fund and the Shares
as the  Distributor  may  reasonably  request;  and the Fund  warrants  that the
statements contained in any such information shall fairly show or represent what
they purport to show or represent.  The Fund shall also furnish the  Distributor
upon request with:  (a) audited  annual  statements  and  unaudited  semi-annual
statements  of a  Portfolio's  books and  accounts  prepared  by the  Fund,  (b)
quarterly earnings statements of a Portfolio prepared by the Fund, (c) a monthly
itemized list of the  securities in a Portfolio,  (d) monthly  balance sheets as
soon as practicable  after the end of each month, and (e) from time to time such
additional  information  regarding the financial condition of a Portfolio as the
Distributor may reasonably request.

     1.11  The  Fund  represents  to  the  Distributor   that  all  Registration
Statements  and  Prospectuses  filed by the Fund with the SEC under the 1933 Act
with  respect  to  the  Shares  have  been  prepared  in  conformity   with  the
requirements  of the  1933  Act  and  the  rules  and  regulations  of  the  SEC
thereunder.  As used in this Agreement,  the term "Registration Statement" shall
mean  any  Registration  Statement  and  any  Prospectus  and any  Statement  of
Additional  Information  relating  to the  Fund  filed  with  the  SEC  and  any
amendments or supplements  thereto at any time filed with the SEC.  Except as to
information included in the Registration  Statement in reliance upon information
provided to the Fund by the  Distributor  or any  affiliate  of the  Distributor
expressly  for  use in the  Registration  Statement,  the  Fund  represents  and
warrants  to  the  Distributor  that  any  Registration  Statement,   when  such
Registration Statement becomes effective, will contain statements required to be
stated therein in conformity  with the 1933 Act and the rules and regulations of
the  SEC;  that  all  statements  of fact  contained  in any  such  Registration
Statement  will be true and correct  when such  Registration  Statement  becomes
effective;  and that no Registration  Statement when such Registration Statement
becomes effective will include an untrue statement of a material fact or omit to
state a material  fact  required to be stated  therein or  necessary to make the
statements  therein not misleading to a purchaser of the Shares. The Distributor
may but shall not be obligated  to propose  from time to time such  amendment or
amendments to any  Registration  Statement and such supplement or supplements to
any Prospectus as, in the light of future  developments,  may, in the opinion of
the  Distributor's  counsel,  be necessary or advisable.  The Distributor  shall
promptly notify the Fund of any advice given to it by its counsel  regarding the
necessity  or  advisability  of  amending  or  supplementing  such  Registration
Statement.  If the Fund shall not propose such  amendment or  amendments  and/or
supplement  or  supplements  within  fifteen days after receipt by the Fund of a
written  request  from the  Distributor  to do so, the  Distributor  may, at its
option,  terminate this Agreement.  The Fund shall not file any amendment to any
Registration  Statement  or  supplement  to any  Prospectus  without  giving the
Distributor  reasonable  notice  thereof in  advance;  provided,  however,  that
nothing  contained in this Agreement  shall in any way limit the Fund's right to
file  at  any  time  such  amendments  to  any  Registration   Statement  and/or
supplements  to any  Prospectus,  of  whatever  character,  as the Fund may deem
advisable, such right being in all respects absolute and unconditional. The Fund
authorizes  the  Distributor  to use any  Prospectus  or Statement of Additional
Information  in the form  furnished by the Fund from time to time in  connection
with the sale of the Shares.

     1.12 No Shares shall be offered by either the Distributor or the Fund under
any of the  provisions of this  Agreement and no orders for the purchase or sale
of  Shares  hereunder  shall  be  accepted  by  the  Fund  if  and  so  long  as
effectiveness  of the  Registration  Statement  then in effect or any  necessary
amendments  thereto shall be suspended  under any of the  provisions of the 1933
Act, or if and so long as a current Prospectus as required by Section 5(b)(2) of
the  1933  Act is not on file  with the SEC;  provided,  however,  that  nothing
contained in this Section 1.12 shall in any way restrict or have any application
to or  bearing  upon  the  Fund's  obligation  to  redeem  Shares  tendered  for
redemption by any  shareholder  in accordance  with the provisions of the Fund's
Registration Statement or Agreement and Declaration of Trust.

     1.13 The Fund  agrees  to  advise  the  Distributor  as soon as  reasonably
practical by a notice in writing delivered to the Distributor:

     (a) of any request by the SEC for amendments to the Registration Statement,
Prospectus  or  Statement  of  Additional  Information  then  in  effect  or for
additional information;

     (b) in the event of the  issuance  by the SEC of any stop order  suspending
the  effectiveness  of the  Registration  Statement,  Prospectus or Statement of
Additional Information then in effect or the initiation by service of process on
the Fund of any proceeding for that purpose;

     (c) of the  happening  of any event that makes  untrue any  statement  of a
material  fact made in the  Registration  Statement,  Prospectus or Statement of
Additional Information then in effect or that requires the making of a change in
such Registration  Statement,  Prospectus or Statement of Additional Information
in order to make the statements therein not misleading; and

     (d) of all  actions  of the  SEC  with  respect  to any  amendments  to any
Registration Statement,  Prospectus or Statement of Additional Information which
may from time to time be filed with the SEC.

     For  purposes of this  Section  1.13,  informal  requests by or acts of the
staff of the SEC shall not be deemed actions of or requests by the SEC.

     1.14 The Fund represents and warrants to the  Distributor  that the Fund is
an investment  company registered under the 1940 Act and the Shares sold by each
Portfolio are, and will be, registered under the 1933 Act.

     1.15 The  Distributor  agrees to  maintain,  and  preserve  for the periods
prescribed  by Rule 31a-2 under the 1940 Act, such records as are required to be
maintained by Rule 31a-1(d) under the 1940 Act.

2.       Compensation and Expenses

         The Fund will bear the following expenses:

     (a)  preparation,  printing and  distribution  of sufficient  copies of the
Prospectus and Statement of Additional Information to existing shareholders;

     (b)   preparation,   printing  and   distribution   of  reports  and  other
communications (not prepared by the Distributor) to existing shareholders;

     (c) registration of the Shares under the federal and state securities laws;

     (d) maintaining facilities for the issue and transfer of Shares;

     (e)  supplying  information,  prices and other data to be  furnished by the
Fund under this Agreement;

     (f) any original issue taxes or other transfer taxes applicable to the sale
or delivery of the Shares or certificates therefor; and

     (g) any  payments  made in  accordance  with  any  plan  hereafter  adopted
pursuant to Rule 12b-1 under the 1940 Act.

3.       Indemnification

     3.1 The Fund agrees to indemnify  and hold the  Distributor,  its officers,
directors, and employees, and any person who controls the Distributor within the
meaning of Section 15 of the 1933 Act,  free and  harmless  from and against any
and all claims,  costs, expenses (including reasonable attorneys' fees), losses,
damages,  charges,  payments  and  liabilities  of any  sort or kind  which  the
Distributor, its officers,  directors,  employees or any such controlling person
may incur under the 1933 Act,  under any other  statute,  or under common law or
otherwise,  arising  out of or based upon (i) any untrue  statement,  or alleged
untrue  statement,  of a material  fact  contained  in the  Fund's  Registration
Statement,   Prospectus  or  Statement  of  Additional   Information  (including
amendments and supplements  thereto), or (ii) any omission, or alleged omission,
to state a  material  fact  required  to be  stated in the  Fund's  Registration
Statement,   Prospectus  or  Statement  of  Additional   Information  (including
amendments or supplements  thereto) or necessary to make the statements  therein
not misleading;  provided, however, that insofar as any losses, claims, damages,
costs, charges, payments, liabilities or expenses arise out of or are based upon
any such untrue  statement or omission or alleged  untrue  statement or omission
made in reliance on and in conformity with information  furnished to the Fund by
the  Distributor  or its affiliated  persons for use in the Fund's  Registration
Statement,   Prospectus  or  Statement  of  Additional   Information  (including
amendments or supplements thereto), such indemnification is not applicable;  and
further  provided that the Fund's agreement to indemnify the Distributor and the
Fund's  representations  and warranties  hereinbefore  set forth in Section 1.11
shall not be deemed to cover any liability to the Fund,  its officers,  trustees
or shareholders  to which the  Distributor  would otherwise be subject by reason
of: (a) the Distributor's  willful  misfeasance,  bad faith or negligence in the
performance  of its duties and  obligations,  or by reason of the  Distributor's
reckless  disregard of its duties and obligations  under this Agreement;  or (b)
the  Distributor's  breach of Section 12 of this Agreement.  The Fund agrees and
acknowledges that the Distributor has not prior to the date hereof assumed,  and
will not assume,  any  obligations or liabilities  arising out of the conduct of
the Fund or its  distributor  prior to the date hereof of those duties which the
Distributor has agreed to perform  pursuant to this Agreement.  The Fund further
agrees to  indemnify  the  Distributor  against any losses,  claims,  damages or
liabilities to which the  Distributor  may become subject in connection with the
conduct by the Fund or its  distributor of such duties prior to the date hereof;
provided  that the Fund's  agreement to indemnify the  Distributor  shall not be
deemed  to  cover  any  liability  to  the  Fund,  its  officers,   trustees  or
shareholders  to which the  Distributor  would otherwise be subject by reason of
willful  misfeasance,  bad faith or negligence in the  performance of its duties
and obligations,  or by reason of the  Distributor's  reckless  disregard of its
duties and obligations under this Agreement.

     3.2 The  Distributor  agrees to indemnify and hold  harmless the Fund,  its
several officers and trustees and each person,  if any, who controls a Portfolio
within the  meaning of Section 15 of the 1933 Act,  from and against any and all
claims, costs, expenses (including reasonable attorneys' fees), losses, damages,
charges,  payments  and  liabilities  of any sort or kind  which the  Fund,  its
officers or trustees,  or any such controlling  person, may incur under the 1933
Act, under any other statute, or under common law or otherwise,  but only to the
extent that such  liability  or expense  incurred by the Fund,  its  officers or
trustees,  or any  controlling  person,  resulting  from such claims or demands,
shall  arise out of or be based upon any  untrue  statement,  or alleged  untrue
statement,  of a material fact contained in the Fund's  Registration  Statement,
Prospectus  or Statement of Additional  Information  (including  amendments  and
supplements  thereto), or any omission, or alleged omission, to state a material
fact required to be stated therein or necessary to make the  statements  therein
not  misleading,  if such  statement  or  omission  was  made in  reliance  upon
information  furnished  or  confirmed  to the  Fund  by the  Distributor  or its
affiliated  persons (as defined in the 1940 Act). The Distributor also agrees to
indemnify  and  hold  harmless  the  Fund,  its  officers  or  trustees,  or any
controlling  person  in  connection  with any  claim or in  connection  with any
action,  suit or  proceeding  which arises out of or is alleged to arise out of:
(a) the  Distributor's  willful  misfeasance,  bad  faith or  negligence  in the
performance  of its duties and  obligations,  or by reason of the  Distributor's
reckless  disregard of its duties and obligations  under this Agreement;  or (b)
the Distributor's  breach of Section 12 of this Agreement.  The foregoing rights
of  indemnification  shall be in addition to any other rights to which the Fund,
its officers or trustees,  or any  controlling  person shall be entitled to as a
matter of law.

     3.3 In any case in which one party hereto (the "Indemnifying Party") may be
asked to  indemnify  or hold the other party  hereto (the  "Indemnified  Party")
harmless,  the Indemnified  Party will notify the Indemnifying  Party in writing
promptly after  identifying any situation which it believes  presents or appears
likely to  present  a claim for  indemnification  (an "Indemnification  Claim")
against the Indemnifying Party,  although the failure to do so shall not relieve
the  Indemnifying  Party from any liability  which it may otherwise  have to the
Indemnified  Party, and the Indemnified Party shall keep the Indemnifying  Party
advised  with  respect  to  all  developments  concerning  such  situation.  The
Indemnifying  Party shall be entitled to  participate  at its own expense in the
defense, or if it so elects, to assume the defense of, any Indemnification Claim
which may be the  subject of this  indemnification,  and,  in the event that the
Indemnifying Party so elects, such defense shall be conducted by counsel of good
standing chosen by the Indemnifying Party and approved by the Indemnified Party,
which approval shall not be unreasonably withheld. In the event the Indemnifying
Party elects to assume the defense of any such Indemnification  Claim and retain
such  counsel,  the  Indemnified  Party shall bear the fees and  expenses of any
additional  counsel  retained by the  Indemnified  Party.  In the event that the
Indemnifying   Party  does  not  elect  to  assume  the   defense  of  any  such
Indemnification  Claim,  or in case the  Indemnified  Party  reasonably does not
approve  of  counsel  chosen by the  Indemnifying  Party,  or in case there is a
conflict of interest  between the Indemnifying  Party or the Indemnified  Party,
the  Indemnifying  Party will reimburse the  Indemnified  Party for the fees and
expenses  of any  counsel  retained by the  Indemnified  Party.  The Fund agrees
promptly to notify the  Distributor  of the  commencement  of any  litigation or
proceedings  against the Fund or any of its  officers or trustees in  connection
with  the  issue  and  sale of any of the  Shares,  and the  Distributor  agrees
promptly to notify the Fund of the commencement of any litigation or proceedings
against  the  Distributor  or any  of  its  officers,  directors,  employees  or
controlling  persons  in  connection  with the  issuance  and sale of any of the
Shares. The Indemnified Party will not confess any Indemnification Claim or make
any  compromise  in any case in which the  Indemnifying  Party  will be asked to
provide  indemnification,  except with the  Indemnifying  Party's  prior written
consent.

     3.4 The  obligations  of the  parties  hereto  under  this  Section 3 shall
survive the termination of this Agreement.

     3.5 The Fund's  indemnification  agreement  contained in this Section 3 and
the  Fund's  representations  and  warranties  in this  Agreement  shall  remain
operative and in full force and effect regardless of any  investigation  made by
or on behalf of the Distributor,  its officers,  directors and employees, or any
controlling person, and shall survive the delivery of any Shares. This agreement
of indemnity will inure exclusively to the Distributor's benefit, to the benefit
of its several officers,  directors and employees,  and their respective estates
and to the benefit of its controlling persons and their successors.

     3.6 The Distributor's indemnification agreement contained in this Section 3
and the  Distributor's  representations  and warranties in this Agreement  shall
remain  operative and in full force and effect  regardless of any  investigation
made  by or on  behalf  of  the  Fund  or  its  officers  and  trustees,  or any
controlling person, and shall survive the delivery of any Shares.

4.       Standard of Care; Limitation of Liability

     4.1 The  Distributor  shall  not be  liable  to the Fund  for any  error of
judgment or mistake of law or for any loss  suffered  by the Fund in  connection
with the performance of its obligations and duties under this Agreement,  except
a loss resulting from: (a) the Distributor's  willful misfeasance,  bad faith or
negligence in the performance of such  obligations  and duties,  or by reason of
its reckless disregard thereof; or (b) the Distributor's breach of Section 12 of
this Agreement.

     4.2 Each party shall have the duty to mitigate  damages for which the other
party may become responsible.

     4.3 NOTWITHSTANDING ANYTHING IN THIS AGREEMENT TO THE CONTRARY, IN NO EVENT
SHALL EITHER PARTY, ITS AFFILIATES OR ANY OF ITS OR THEIR  DIRECTORS,  TRUSTEES,
OFFICERS,  EMPLOYEES,  AGENTS OR SUBCONTRACTORS BE LIABLE TO THE OTHER PARTY FOR
CONSEQUENTIAL DAMAGES, PROVIDED, HOWEVER, THAT NOTHING CONTAINED IN THIS SECTION
4.3 SHALL BE CONSTRUED SO AS TO LIMIT THE RIGHTS OF ANY SHAREHOLDER OF THE FUND,
WHETHER SUING ON HIS, HER OR ITS OWN BEHALF OR DERIVATIVELY THROUGH THE FUND, TO
CONSEQUENTIAL DAMAGES.

5.       Term

     5.1 This Agreement  shall become  effective on the date first written above
and, unless sooner terminated as provided herein, shall continue until April 30,
2000 and thereafter shall continue  automatically for successive one-year terms,
provided such continuance is specifically  approved at least annually by (i) the
Fund's Board of Trustees or (ii) by a vote of a majority (as defined in the 1940
Act and Rule 18f-2 thereunder) of the outstanding voting securities of the Fund,
provided that in either event the  continuance is also approved by a majority of
the trustees who are not parties to this  Agreement  and who are not  interested
persons  (as  defined in the 1940 Act) of any party to this  Agreement,  by vote
cast in person at a meeting  called for the purpose of voting on such  approval.
This Agreement is terminable  without  penalty,  on at least sixty days' written
notice,  by the Fund's Board of  Trustees,  by vote of a majority (as defined in
the 1940 Act and Rule 18f-2 thereunder) of the outstanding  voting securities of
the  Fund,  or  by  the   Distributor.   This   Agreement  will  also  terminate
automatically in the event of its assignment (as defined in the 1940 Act and the
rules thereunder).

     5.2 In the event a  termination  notice  is given by the Fund and  provided
that the  Distributor is not in default under this Agreement at the time of such
termination  notice,  all  expenses  associated  with  movement  of records  and
materials and conversion thereof to a successor distributor will be borne by the
Fund.

6.       Modifications and Waivers

     No change, termination, modification, or waiver of any term or condition of
the  Agreement  shall be valid unless in writing  signed by each party.  No such
writing  shall be  effective as against the  Distributor  unless said writing is
executed by a Senior Vice  President,  Executive  Vice President or President of
the  Distributor.  No such writing shall be effective as against the Fund unless
said  writing is executed by the  Chairman of the Fund's  Board of  Trustees.  A
party's  waiver of a breach of any term or condition in the Agreement  shall not
be  deemed a waiver of any  subsequent  breach  of the same or  another  term or
condition.

7.       No Presumption Against Drafter

     The Distributor  and the Fund have jointly  participated in the negotiation
and drafting of this  Agreement.  The Agreement shall be construed as if drafted
jointly by the Fund and the Distributor,  and no presumptions arise favoring any
party by virtue of the authorship of any provision of this Agreement.

8.       Publicity

     Neither  the  Distributor  nor the  Fund  shall  release  or  publish  news
releases, public announcements,  advertising or other publicity relating to this
Agreement or to the  transactions  contemplated  by it without  prior review and
written approval of the other party;  provided,  however,  that either party may
make such  disclosures  as are  required  by  legal,  accounting  or  regulatory
requirements  after making reasonable efforts in the circumstances to consult in
advance with the other party.

9.       Severability

     The parties intend every provision of this Agreement to be severable.  If a
court of competent jurisdiction determines that any term or provision is illegal
or invalid for any reason,  the  illegality or  invalidity  shall not affect the
validity of the remainder of this Agreement.  In such case, the parties shall in
good faith modify or  substitute  such  provision  consistent  with the original
intent of the parties.  Without limiting the generality of this paragraph,  if a
court  determines  that any remedy  stated in this  Agreement  has failed of its
essential  purpose,  then all other  provisions of this  Agreement  shall remain
fully effective.

10.      Force Majeure

     No party shall be liable for any default or delay in the performance of its
obligations  under this  Agreement if and to the extent such default or delay is
caused, directly or indirectly,  by circumstances beyond such party's reasonable
control.  In any such event, the non-performing  party shall be excused from any
further  performance  and observance of the  obligations so affected only for so
long as such circumstances  prevail and such party continues to use commercially
reasonable   efforts  to  recommence   performance  or  observance  as  soon  as
practicable.

11.      Miscellaneous

     11.1  Any  notice  or  other  instrument  authorized  or  required  by this
Agreement  to be  given  in  writing  to the  Fund or the  Distributor  shall be
sufficiently  given if  addressed  to the party and received by it at its office
set forth below or at such other place as it may from time to time  designate in
writing.

                                            To the Fund:

                                            James D. Grassi, Esq.
                                            The Northern Trust Company
                                            50 South LaSalle Street - M-9
                                            Chicago, IL  60675

                                            with a copy to:

                                            W. Bruce McConnel, III, Esq.
                                            Philadelphia National Bank Building
                                            1345 Chestnut Street
                                            Philadelphia, PA  19107

                                            To the Distributor:

                                            First Data Distributors, Inc.
                                            4400 Computer Drive
                                            Westboro, Massachusetts 01581
                                            Attention:  President

                                            with a copy to the Distributor's
                                            Chief Legal Officer

     11.2 The laws of the Commonwealth of  Massachusetts,  excluding the laws on
conflicts of laws,  and the  applicable  provisions of the 1940 Act shall govern
the  interpretation,  validity,  and enforcement of this Agreement (except as to
Section 15 hereof which shall be construed  in  accordance  with the laws of the
State of Delaware).  To the extent the provisions of Massachusetts (or Delaware)
law or the  provisions  hereof  conflict  with the 1940 Act,  the 1940 Act shall
control.  All actions arising from or related to this Agreement shall be brought
in the  state  and  federal  courts  sitting  in the  City  of  Boston,  and the
Distributor and the Fund hereby submit themselves to the exclusive  jurisdiction
of those courts.

     11.3 This Agreement may be executed in any number of counterparts,  each of
which shall be deemed to be an original and which  collectively  shall be deemed
to constitute only one instrument.

     11.4 The  captions  of this  Agreement  are  included  for  convenience  of
reference only and in no way define or delimit any of the  provisions  hereof or
otherwise affect their construction or effect.

     11.5 This Agreement shall be binding upon and shall inure to the benefit of
the parties hereto and their respective successors and is not intended to confer
upon any other person any rights or remedies hereunder.

12.      Confidentiality

     12.1 The parties agree that the Proprietary  Information (defined below) is
confidential information of the parties and their respective licensers. The Fund
and the  Distributor  shall  exercise at least the same degree of care,  but not
less than reasonable care, to safeguard the  confidentiality  of the Proprietary
Information  of the other as it would protect its own  Proprietary  Information.
The  Fund  and  the  Distributor  may use the  Proprietary  Information  only to
exercise their respective  rights or perform their respective  duties under this
Agreement.  Except as otherwise  required by law,  the Fund and the  Distributor
shall not duplicate,  sell or disclose to others the Proprietary  Information of
the other,  in whole or in part,  without the prior  written  permission  of the
other party. The Fund and the Distributor  may,  however,  disclose  Proprietary
Information  to  their  respective  employees  who  have  a  need  to  know  the
Proprietary  Information  to perform work for the other,  provided that the Fund
and the Distributor shall use reasonable  efforts to ensure that the Proprietary
Information  is not  duplicated  or disclosed by their  respective  employees in
breach of this  Agreement.  The Fund and the  Distributor  may also disclose the
Proprietary  Information to independent  contractors,  auditors and professional
advisors,  provided  they first agree in writing to be bound by  confidentiality
obligations  substantially  similar  to this  Section  12.  Notwithstanding  the
previous sentence, in no event shall either the Fund or the Distributor disclose
the  Proprietary  Information to any  competitor of the other without  specific,
prior written consent.

12.2     Proprietary Information means:

     (a) any data or information that is completely sensitive material,  and not
generally known to the public,  including, but not limited to, information about
product   plans,   marketing   strategies,    finance,   operations,    customer
relationships,  customer profiles, sales estimates, business plans, and internal
performance  results relating to the past, present or future business activities
of the Fund or the  Distributor,  their  respective  subsidiaries and affiliated
companies and the customers, clients and suppliers of any of them;

     (b) any scientific or technical information,  design,  process,  procedure,
formula,  or improvement  that is commercially  valuable and secret in the sense
that its  confidentiality  affords  the Fund or the  Distributor  a  competitive
advantage over its competitors;

     (c) all confidential or proprietary concepts, documentation, reports, data,
specifications,  computer  software,  source  code,  object  code,  flow charts,
databases,  inventions,  know-how,  show-how and trade  secrets,  whether or not
patentable or copyrightable;

     (d) all  documents,  inventions,  substances,  engineering  and  laboratory
notebooks,  drawings, diagrams,  specifications,  bills of material,  equipment,
prototypes and models, and any other tangible  manifestation of the foregoing of
either  party  which now exist or come into the  control  or  possession  of the
other; and

     (e) with respect to the Fund, all records and other information relative to
the Fund and its prior,  present or potential  shareholders (and clients of such
shareholders).

     12.3  Notwithstanding the foregoing,  it is hereby understood and agreed by
the parties  hereto that any marketing  strategies,  financing  plans,  customer
profiles, sales estimates, business plans or similar items prepared or developed
by the  Distributor  for  the  benefit  of the  Fund  shall  be  considered  the
Proprietary  Information  of the Fund and  nothing  in this  Agreement  shall be
construed  to prevent or  prohibit  the Fund from  disclosing  such  Proprietary
Information to a successor distributor.

     12.4 The  obligations  of the parties  hereto  under this  Section 12 shall
survive the termination of this Agreement.


13.      Trustee and Shareholder Liability

     This Agreement is executed by or on behalf of the Fund with respect to each
of the Portfolios and the obligations  hereunder are not binding upon any of the
trustees, officers or shareholders of the Fund individually but are binding only
upon the Portfolio to which such obligations pertain and the assets and property
of such Portfolio.  All obligations of the Fund under this Agreement shall apply
only on a  Portfolio-by-Portfolio  basis,  and the assets of one Portfolio shall
not be liable for the obligations of another Portfolio.

14.      Entire Agreement

     This  Agreement,  including all Schedules  hereto,  constitutes  the entire
agreement  between the parties  with  respect to the subject  matter  hereof and
supersedes  all  prior and  contemporaneous  proposals,  agreements,  contracts,
representations,  and  understandings,  whether  written  or oral,  between  the
parties with respect to the subject matter hereof.

     IN WITNESS  WHEREOF,  the parties  hereto have caused this  Agreement to be
duly executed all as of the day and year first above written.


         NORTHERN INSTITUTIONAL FUNDS



                                   By: /s/ William H. Springer

                                   Name:

                                   Title:




                                   FIRST DATA DISTRIBUTORS, INC.



                                   By: /s/  Scott M. Hacker

                                   Name:    Scott M. Hacker

                                   Title:   VP & Treasurer

                                   SCHEDULE A

                               NAME OF PORTFOLIOS


Diversified Assets Portfolio
Government Portfolio
Government Select Portfolio
Tax-Exempt Portfolio
U.S. Government Securities Portfolio
Short-Intermediate Bond Portfolio
U.S. Treasury Index Portfolio
Bond Portfolio
Intermediate Bond Portfolio
International Bond Portfolio
Balanced Portfolio
Equity Index Portfolio
Diversified Growth Portfolio
Focused Growth Portfolio
Small Company Index Portfolio
International Equity Index Portfolio
International Growth Portfolio

                                   SCHEDULE B

                              DISTRIBUTION SERVICES

     The Distributor shall, at its own expense,  finance appropriate  activities
which are primarily intended to result in the sale of the Shares.  Such services
shall include, but are not limited to:

1.       Preparation and execution of selling agreements
                  monitoring accruals
                  monitoring expenses
                  making disbursements for expenses and fees

2.       Preparation of sales presentations, mailings and advertising

3.       Advertising and sales literature review, recommendations and
         submission to the NASD

4.        Initial certification of representatives
                  supplying written study materials
                  supplying, review and grading of certification exams

5.        Preparation of written compliance materials for certified and/or
          registered representatives

6.        Preparation of ongoing  compliance  updates for certified  and/or
          registered  representatives  regarding sales practices, written
          correspondence and other communications

7.        Investor qualification calls, as necessary

8.        Printing and mailing of Prospectuses to other than existing
          shareholders

9.        Formation and maintenance of a private label distributor for
          the Shares



                                                                 Exhibit (h)(13)

                           CO-ADMINISTRATION AGREEMENT

     THIS ADMINISTRATION  AGREEMENT (the "Agreement"),  dated as of this 1st day
of May, 1999 (the "Effective  Date"),  by and among FIRST DATA INVESTOR SERVICES
GROUP,  INC.  ("Investor  Services  Group"),  a Massachusetts  corporation,  THE
NORTHERN   TRUST  COMPANY   ("Northern"),   an  Illinois   state  bank  (each  a
"Co-Administrator"  and  collectively,  the  "Co-Administrators"),  and NORTHERN
INSTITUTIONAL FUNDS (the "Fund"), a Delaware business trust.

     WHEREAS,  the  Fund is  registered  as an  open-end  management  investment
company under the  Investment  Company Act of 1940, as amended (the "1940 Act");
and

     WHEREAS, the Fund desires to retain the Co-Administrators to render certain
administrative  services  with respect to each  investment  portfolio  listed in
Schedule A hereto,  as the same may be amended  from time to time by the parties
hereto (collectively,  the "Portfolios"),  and the Co-Administrators are willing
to render such services.

                                   WITNESSETH:

     NOW,  THEREFORE,  in consideration of the premises and mutual covenants set
forth herein and intending to be legally bound hereby,  the parties hereto agree
as follows:

Article  1        Definitions.

     Whenever used in this Agreement,  the following  words and phrases,  unless
the context otherwise requires, shall have the following meanings:

     (a)  "Advisory  Agreement"  shall mean the  Investment  Advisory  Agreement
between the Fund and Northern  dated March 31, 1998,  as currently in effect and
as amended and/or superseded from time to time.

     (b) "Articles of  Incorporation"  shall mean the Articles of Incorporation,
Declaration of Trust, or other similar  organizational  document as the case may
be, of a party as the same may be amended from time to time.

     (c) "Authorized  Person" shall be deemed to include (i) any Board Member or
officer  of the  Fund;  or (ii) any  person,  whether  or not such  person is an
officer or employee of the Fund,  duly  authorized to give Oral  Instructions or
Written  Instructions  on  behalf  of the  Fund as  indicated  in  writing  to a
Co-Administrator from time to time.

     (d) "Board  Members"  shall mean the Directors or Trustees of the governing
body of the Fund, as the case may be.

     (e)  "Board of  Directors"  shall mean the Board of  Directors  or Board of
Trustees of the Fund, as the case may be.

     (f) "By-Laws"  shall mean the By-Laws of a party as the same may be amended
from time to time.

     (g) "Commission" shall mean the Securities and Exchange Commission.

     (h)  "Custodian"  refers to any custodian or subcustodian of securities and
other  property,  which the Fund may from time to time  deposit,  or cause to be
deposited  or held under the name or account of such a  custodian  pursuant to a
custody agreement.

     (i) "1933  Act"  shall  mean the  Securities  Act of 1933 and the rules and
regulations promulgated thereunder, all as amended from time to time.

     (j) "1940 Act" shall mean the Investment  Company Act of 1940 and the rules
and regulations promulgated thereunder, all as amended from time to time.

     (k)  "Oral  Instructions"  shall  mean  instructions,  other  than  Written
Instructions,  actually received by a Co-Administrator  from a person reasonably
believed by a Co-Administrator to be an Authorized Person.

     (l) "Prospectus"  shall mean the most recently dated Fund  Prospectuses and
Statements of Additional Information,  including any supplements thereto if any,
which has become effective under the 1933 Act and the 1940 Act.

     (m)  "Shares"  refers  collectively  to such  shares  of  capital  stock or
beneficial  interest,  as the case may be, or class thereof,  of each respective
Portfolio of the Fund as may be issued from time to time.

     (n) "Written  Instructions" shall mean a written  communication signed by a
person reasonably  believed by a Co-Administrator to be an Authorized Person and
actually  received by a  Co-Administrator.  Written  Instructions  shall include
manually executed originals and authorized electronic  transmissions,  including
telefacsimile of a manually executed original or other process.

Article  2        Appointment of the Co-Administrators.

     The Fund hereby  appoints  Northern and Investor  Services  Group to act as
Co-Administrators  of the Fund for the period and on the terms set forth in this
Agreement.  Northern and Investor  Services  Group accept such  appointment  and
agree to render  the  services  herein  set forth  for the  compensation  herein
provided. This Agreement shall be effective and binding on the parties hereto as
of the Effective Date.

Article  3        Duties of the Co-Administrators.

     3.1  Subject to the  general  supervision  of the Board of  Directors,  the
Co-Administrators  shall  provide  supervision  of all  aspects  of  the  Fund's
operations  (other than those  referred  to in  paragraph  3(a) of the  Advisory
Agreement) and perform the customary services of an administrator, including but
not limited to the  corporate  secretarial,  treasury  and blue sky services set
forth in Schedule B to this Agreement.

     3.2 In performing their duties under this Agreement, the Co-Administrators:
(a)  will  act in  accordance  with  the  Articles  of  Incorporation,  By-Laws,
Prospectus and with the Oral  Instructions and Written  Instructions of the Fund
and will  conform to and comply  with the  requirements  of the 1940 Act and all
other  applicable  federal or state laws and  regulations;  and (b) will consult
with legal counsel to the Fund, as necessary and appropriate.  Furthermore,  the
Co-Administrators  shall  not  have or be  required  to have  any  authority  to
supervise the investment or reinvestment  of the securities or other  properties
which  comprise  the assets of the Fund or any of its  Portfolios  and shall not
provide any  investment  advisory  services to the Fund or any of its Portfolios
under this Agreement.

     3.3 In addition to the duties set forth herein, the Co-Administrators shall
perform  such  other  duties  and  functions,  and  shall be paid  such  amounts
therefor,  as may from time to time be agreed  upon in writing  between the Fund
and the Co-Administrators.

     3.4 The Co-Administrators agree to provide the services described herein in
accordance  with the  performance  standards  annexed  hereto  as  Exhibit  1 of
Schedule  B  and  incorporated  herein  (the  "Performance   Standards").   Such
Performance Standards may be amended from time to time upon written agreement by
the parties.

     3.5  The  services  of  the  Co-Administrators  hereunder  are  not  deemed
exclusive and the Co-Administrators  shall be free to render similar services to
others so long as their services under this Agreement are not impaired thereby.

Article  4        Recordkeeping and Other Information.

     4.1 The Co-Administrators shall create and maintain all records required of
them  pursuant  to their  duties  hereunder  and as set forth in  Schedule  B in
accordance with all applicable laws, rules and  regulations,  including  records
required by Section 31(a) of the 1940 Act. Where applicable,  such records shall
be  maintained  by the  Co-Administrators  for  the  periods  and in the  places
required by Rule 31a-2 under the 1940 Act.

     4.2  To  the  extent   required  by  Section  31  of  the  1940  Act,   the
Co-Administrators  agree that all such  records  prepared or  maintained  by the
Co-Administrators   relating   to  the   services   to  be   performed   by  the
Co-Administrators  hereunder are the property of the Fund and will be preserved,
maintained  and made  available in  accordance  with such  section,  and will be
surrendered promptly to the Fund on and in accordance with the Fund's request.

Article  5        Fund Instructions.

     5.1 A  Co-Administrator  will have no liability when acting upon Written or
Oral  Instructions   reasonably   believed  to  have  been  executed  or  orally
communicated by an Authorized  Person and will not be held to have any notice of
any change of  authority of any person  until  receipt of a Written  Instruction
thereof from the Fund.

     5.2 At any time, a Co-Administrator  may request Written  Instructions from
the Fund and may seek advice from legal  counsel for the Fund,  or its own legal
counsel,  with respect to any matter arising in connection  with this Agreement,
and it shall not be liable  for any  action  taken or not taken in good faith in
accordance  with such Written  Instructions or in accordance with the opinion of
counsel for the Fund or for the Co-Administrator. Written Instructions requested
by a Co-Administrator will be provided by the Fund within a reasonable period of
time.

     5.3 Each Co-Administrator,  its officers, agents or employees, shall accept
Oral  Instructions  or  Written   Instructions  given  to  them  by  any  person
representing or acting on behalf of the Fund only if said  representative  is an
Authorized  Person. The Fund agrees that all Oral Instructions shall be followed
within one business day by confirming Written Instructions,  and that the Fund's
failure to so confirm shall not impair in any respect a Co-Administrator's right
to rely on Oral Instructions.

Article  6        Compensation.

     6.1 Each  Co-Administrator  will from time to time employ or associate with
itself  such  person  or  persons  as the  Co-Administrator  may  believe  to be
particularly  suited to assist it in performing  services under this  Agreement.
Such person or persons  include  officers and employees who are employed by both
the  Co-Administrator   and  the  Fund.  The  Co-Administrator   shall  pay  the
compensation  of such person or persons and no  obligation  shall be incurred on
behalf of the Fund in such respect.

     6.2 The Co-Administrators shall not be required to pay any of the following
expenses  incurred  by the  Fund:  membership  dues  in the  Investment  Company
Institute or any similar  organization;  investment  advisory fees;  custody and
transfer agency fees;  fees paid under any service or distribution  plan adopted
by the  Fund;  costs  of  printing  and  mailing  stock  certificates;  costs of
typesetting  and  printing of the  Prospectus  for  regulatory  purposes and for
distribution to existing shareholders of the Portfolios;  costs of shareholders'
reports and notices;  interest on borrowed money; brokerage  commissions;  stock
exchange  listing  fees;  taxes and fees  payable  to  federal,  state and other
governmental agencies;  fees of Board Members of the Fund who are not affiliated
with the Co-Administrators;  outside auditing expenses;  outside legal expenses;
blue sky  registration  or filing fees; or other  expenses not specified in this
Section 6.2 which may be  properly  payable by the Fund.  The  Co-Administrators
shall not be required to pay any blue sky registration or filing fees unless and
until they have received the amount of such fees from the Fund.

     6.3 The  Fund on  behalf  of each of the  Portfolios  will  compensate  the
Co-Administrators   for  the  performance  of  their  obligations  hereunder  in
accordance  with the fees and  charges  set forth in the  written  Fee  Schedule
annexed hereto as Schedule C and incorporated herein.

     6.4 During the term of this Agreement,  the Co-Administrators  will pay all
expenses  incurred by them in connection  with the  performance  of their duties
under  Article 3 and Article 4 hereof,  other than those items listed in Section
6.2 and those  out-of-pocket costs of the preparations,  submissions,  updatings
and filings of the Fund's Prospectus.

     6.5 If in any fiscal year, the sum of a Portfolio's expenses (including the
fee  payable  pursuant  to Section  6.3 hereof,  but  excluding  the  investment
advisory  fee and  transfer  agency fee  payable  to  Northern  pursuant  to its
agreements  with the Fund,  servicing fees, and  extraordinary  expenses such as
taxes,  interest,  and indemnification  expenses) exceeds on an annualized basis
 .10% of a Portfolio's average net assets (.25% for each International  Portfolio
as  defined  in  Schedule  A to  this  Agreement)  for  such  fiscal  year,  the
Co-Administrators will reimburse each Portfolio for the amount of such excess in
accordance with the following timetable. Expense reimbursements, if any, will be
calculated  and  paid  monthly.  The  amount  of the  reimbursement  paid by the
Co-Administrators to each Portfolio will be computed as of the end of each month
by (a) determining the difference  between the  Portfolio's  accrued  annualized
expense  ratio  and  the  above  percentage  limitation;  (b)  multiplying  this
percentage  by the  Portfolio's  year to date  average  net asset value for such
month to obtain the cumulative dollar amount of such excess; and (c) subtracting
from the  cumulative  dollar  amount of such  excess  the  cumulative  amount of
reimbursements  made  to  such  Portfolio  by the  Co-Administrators  since  the
beginning of the fiscal year. A positive  remainder  represents the amount to be
paid by the Co-Administrators to the Portfolio;  a negative remainder represents
the amount to be paid by the Portfolio to the Co-Administrators.

     6.6 Any compensation  agreed to hereunder may be adjusted from time to time
by the unanimous consent of the parties.

Article  7        Documents.

     In  connection  with the  appointment  of the  Co-Administrators,  the Fund
shall,  on or before the  Effective  Date,  but in any case within a  reasonable
period of time for the  Co-Administrators  to prepare to  perform  their  duties
hereunder,  deliver  or  caused to be  delivered  to the  Co-Administrators  the
documents set forth in the written schedule of fund documents  annexed hereto as
Schedule D.

Article  8        Fund Accounting System.

     8.1 Each  Co-Administrator  shall retain title to and  ownership of any and
all data bases, computer programs,  screen formats, report formats,  interactive
design  techniques,  derivative works,  inventions,  discoveries,  patentable or
copyrightable matters, concepts,  expertise, patents, copyrights, trade secrets,
and other related legal rights owned and/or  developed by it in connection  with
the  services  provided by such  Co-Administrator  to the Fund  pursuant to this
Agreement (the "Co-Administrator System").

     8.2 Each  Co-Administrator  hereby grants to the Fund a limited  license to
the  Co-Administrator  System for the sole and  limited  purpose of having  such
Co-Administrator   provide  the  services  contemplated  hereunder  and  nothing
contained in this Agreement shall be construed or interpreted otherwise and such
license shall immediately terminate with the termination of this Agreement.

     8.3 In the event that the Fund,  including  any  affiliate  or agent of the
Fund or any third party  acting on behalf of the Fund,  is provided  with direct
access to the  Co-Administrator  System,  such direct access capability shall be
limited  to direct  entry to the  Co-Administrator  System  by means of  on-line
mainframe  terminal entry or PC emulation of such mainframe  terminal entry, and
any  other   non-conforming   method  of  transmission  of  information  to  the
Co-Administrator System is strictly prohibited without the prior written consent
of the particular Co-Administrator.

Article  9        Representations and Warranties.

     9.1 Investor Services Group represents and warrants to the Fund that:

     (a) it is a corporation duly organized, existing and in good standing under
the laws of the jurisdiction in which it is organized;

     (b)  it  is  empowered  under  applicable  laws  and  by  its  Articles  of
Incorporation and By-Laws to enter into and perform the services contemplated by
this Agreement;

     (c) all requisite corporate  proceedings have been taken to authorize it to
enter into this Agreement; and

     (d) it has and will  continue to have access to the  necessary  facilities,
equipment  and  personnel  to  perform  its duties  and  obligations  under this
Agreement.

     9.2 Northern represents and warrants to the Fund that:

     (a) it is duly  organized,  existing and in good standing under the laws of
the jurisdiction in which it is organized;

     (b)  it  is  empowered  under  applicable  laws  and  by  its  Articles  of
Incorporation and By-Laws to enter into and perform the services contemplated by
this Agreement;

     (c) all requisite corporate  proceedings have been taken to authorize it to
enter into this Agreement; and

     (d) it has and will  continue to have access to the  necessary  facilities,
equipment  and  personnel  to  perform  its duties  and  obligations  under this
Agreement.

     9.3 The Fund represents and warrants to each Co-Administrator that:

     (a) it is duly  organized,  existing and in good standing under the laws of
the jurisdiction in which it is organized;

     (b)  it  is  empowered  under  applicable  laws  and  by  its  Articles  of
Incorporation and By-Laws to enter into this Agreement;

     (c) all corporate  proceedings  required by said Articles of Incorporation,
By-Laws and  applicable  laws have been taken to authorize it to enter into this
Agreement;

     (d) a registration  statement under the 1933 Act and the 1940 Act on behalf
of each of the Portfolios is currently effective; and

     (e) as of the date hereof,  each Portfolio is duly  registered and lawfully
eligible for sale in each jurisdiction  indicated for such Portfolio on the list
furnished to the  Co-Administrators  pursuant to Article 7 of this Agreement and
that it will  notify the  Co-Administrators  immediately  of any  changes to the
aforementioned list.

Article  10       Indemnification.

     10.1 The Fund shall indemnify and hold each Co-Administrator  harmless from
and against any and all claims, costs, expenses (including reasonable attorneys'
fees), losses,  damages,  charges,  payments and liabilities of any sort or kind
which may be asserted against a Co-Administrator or for which a Co-Administrator
may  be  held  to  be  liable  in   connection   with   this   Agreement   or  a
Co-Administrator's performance hereunder (a "Claim"), unless such Claim resulted
from:   (a)  the  willful   misfeasance,   bad  faith  or   negligence  of  such
Co-Administrator in the performance of its duties hereunder, or by reason of its
reckless disregard thereof; or (b) such Co-Administrator's  breach of Article 14
of this Agreement.

     10.2 The Fund agrees and acknowledges that the  Co-Administrators  have not
prior to the Effective  Date assumed,  and will not assume,  any  obligations or
liabilities arising out of the conduct by the Fund or its administrator prior to
the Effective  Date of those duties which the  Co-Administrators  have agreed to
perform  pursuant to this  Agreement.  The Fund further agrees to indemnify each
Co-Administrator  against any losses,  claims, damages or liabilities to which a
Co-Administrator  may become subject in connection  with the conduct by the Fund
or its administrator of such duties prior to the Effective Date.

     10.3 Each  Co-Administrator  jointly and severally shall indemnify and hold
the  Fund  harmless  from  and  against  any and  all  claims,  costs,  expenses
(including reasonable attorneys' fees), losses, damages,  charges,  payments and
liabilities  of any sort or kind which may be  asserted  against the Fund or for
which the Fund may be held to be liable in connection with this Agreement or the
Fund's  performance  hereunder (a "Claim"),  provided  that such Claim  resulted
from:   (a)  the  willful   misfeasance,   bad  faith  or   negligence  of  such
Co-Administrator in the performance of its duties hereunder, or by reason of its
reckless disregard thereof; or (b) such Co-Administrator's  breach of Article 14
of this Agreement.

     10.4 In any case in which one party (the "Indemnifying Party") may be asked
to indemnify or hold  another  party (the  "Indemnified  Party")  harmless,  the
Indemnified  Party will notify the Indemnifying  Party in writing promptly after
identifying  any  situation  which it  believes  presents  or appears  likely to
present a claim for  indemnification  (an  "Indemnification  Claim") against the
Indemnifying  Party,  although  the  failure  to do so  shall  not  relieve  the
Indemnifying  Party  from  any  liability  which  it may  otherwise  have to the
Indemnified  Party, and the Indemnified Party shall keep the Indemnifying  Party
advised  with  respect  to  all  developments  concerning  such  situation.  The
Indemnifying  Party shall be entitled to  participate  at its own expense in the
defense, or if it so elects, to assume the defense of, any Indemnification Claim
which may be the  subject of this  indemnification,  and,  in the event that the
Indemnifying Party so elects, such defense shall be conducted by counsel of good
standing chosen by the Indemnifying Party and approved by the Indemnified Party,
which approval shall not be unreasonably withheld. In the event the Indemnifying
Party elects to assume the defense of any such Indemnification  Claim and retain
such  counsel,  the  Indemnified  Party shall bear the fees and  expenses of any
additional  counsel  retained by the  Indemnified  Party.  In the event that the
Indemnifying   Party  does  not  elect  to  assume  the   defense  of  any  such
Indemnification  Claim,  or in case the  Indemnified  Party  reasonably does not
approve  of  counsel  chosen by the  Indemnifying  Party,  or in case there is a
conflict of interest  between the Indemnifying  Party or the Indemnified  Party,
the  Indemnifying  Party will reimburse the  Indemnified  Party for the fees and
expenses of any counsel retained by the Indemnified Party. The Indemnified Party
will not confess any Indemnification Claim or make any compromise in any case in
which the Indemnifying  Party will be asked to provide  indemnification,  except
with the  Indemnifying  Party's prior written  consent.  The  obligations of the
parties  hereto  under this  Article 10 shall  survive the  termination  of this
Agreement.

Article  11       Standard of Care.

     11.1 The  Co-Administrators  shall at all times act in good faith and agree
to use their best efforts within  commercially  reasonable  limits to ensure the
accuracy  of  all  services  performed  under  this  Agreement,  but  assume  no
responsibility  for loss or damage to the Fund  unless said errors are caused by
the  Co-Administrators'  willful  misfeasance,  bad faith or  negligence  in the
performance of their duties hereunder,  or by reason of their reckless disregard
thereof.

     11.2 Each party shall have the duty to mitigate  damages for which  another
party may become responsible.

     11.3  Without  in  any  way  limiting  the  foregoing,  in  the  event  the
Co-Administrators   shall   provide   blue  sky   services  to  the  Fund,   the
Co-Administrators  shall have no liability for failing to file on a timely basis
any   material  to  be  provided   by  the  Fund  or  its   designee   that  the
Co-Administrators  have  not  received  on a timely  basis  from the Fund or its
designee,  nor shall the Co-Administrators have any responsibility to review the
accuracy or adequacy of materials they receive from the Fund or its designee for
filing; nor shall the Co-Administrators  have any liability for monetary damages
for the sale of  securities  in  jurisdictions  where  Shares  are not  properly
registered,  or in jurisdictions where Shares are sold in excess of the lawfully
registered amount, unless such failure of proper registration or excess sales is
due  to   the   willful   misfeasance,   bad   faith   or   negligence   of  the
Co-Administrators,  or the reckless  disregard of their  duties  hereunder.  The
Co-Administrators  shall  not  be  liable  for  any  errors  which  result  from
inaccurate or inadequate information reported to the Co-Administrators  directly
or indirectly  from the Fund's transfer agent.  The  Co-Administrators  shall be
under no  obligation to  investigate  or confirm the accuracy or adequacy of any
information provided to the Co-Administrators by the Fund's transfer agent.

     11.4  NOTWITHSTANDING  ANYTHING IN THIS  AGREEMENT TO THE  CONTRARY,  IN NO
EVENT  SHALL  ANY  PARTY,  ITS  AFFILIATES  OR ANY OF  ITS OR  THEIR  DIRECTORS,
TRUSTEES,  OFFICERS,  EMPLOYEES, AGENTS OR SUBCONTRACTORS BE LIABLE TO ANY OTHER
PARTY FOR CONSEQUENTIAL DAMAGES.

Article  12       Term and Termination.

     12.1 This Agreement  shall be effective on the Effective  Date and,  unless
sooner  terminated as provided herein,  shall continue until April 30, 2001 (the
"Initial Term").

     12.2 Upon the expiration of the Initial Term, this Agreement shall continue
automatically  for successive  one-year terms ("Renewal  Terms") with respect to
each  Portfolio,  provided such  continuance is  specifically  approved at least
annually  by (i) the  Board of  Directors  or (ii) by a vote of a  majority  (as
defined in the 1940 Act and Rule 18f-2  thereunder)  of the  outstanding  voting
securities  of the  particular  Portfolio,  provided  that in  either  event the
continuance  is also  approved  by a majority  of the Board  Members who are not
parties to this Agreement and who are not interested  persons (as defined in the
1940  Act) of any party to this  Agreement,  by vote cast in person at a meeting
called for the purpose of voting on such approval.

     12.3 The Fund may  terminate  this  Agreement at any time after the Initial
Term, with or without cause,  and without  penalty,  on at least sixty (60) days
written notice to the Co-Administrators.

     12.4 Each  Co-Administrator  may terminate  this  Agreement with respect to
itself at any time after the Initial Term,  with or without  cause,  and without
penalty,  on at least sixty (60) days  written  notice to the Fund and the other
Co-Administrator.

     12.5 The Fund may terminate  this  Agreement at any time during the Initial
Term in the event that the Fund or its  shareholders  incur damages in excess of
one hundred thousand dollars ($100,000) as a result of the willful  misfeasance,
bad faith or negligence of the  Co-Administrators,  or the reckless disregard of
their duties hereunder. For this purpose, "damages" is defined as damages caused
by a single event,  or cumulative  series of events  related to the same matter,
which  generates  a monetary  loss to the Fund or its  shareholders.  The Fund's
right to  terminate  this  Agreement  pursuant to this Section 12.5 shall remain
effective even if the  Co-Administrators  have made the Fund or its shareholders
whole with respect to the damages caused.

     12.6 The Fund may also  terminate  this  Agreement  at any time  during the
Initial  Term,  regardless  of  the  amount  of  damages  to  the  Fund  or  its
shareholders, in the event that the Co-Administrators have failed to meet one of
the  performance  standards set forth in Exhibit 1 to Schedule B (a  "Triggering
Event").  The Fund will  provide  the  Co-Administrators  with  sixty  (60) days
written  notice if the Fund  intends to exercise  its option to  terminate  this
Agreement under this Section 12.6; provided,  however,  that such notice must be
given  within  sixty  (60)  days  following  the end of the  month in which  the
Triggering Event occurs.  Notwithstanding the foregoing, the Fund's rights under
this Section 12.6 shall not become  effective  until ninety (90) days  following
the Effective Date.

     12.7 In the event this Agreement: (a) is terminated by the Fund pursuant to
Section  12.5  or  Section  12.6  hereof;  or  (b) is not  continued  after  the
expiration  of the Initial Term or any Renewal  Term,  all  reasonable  expenses
associated with the movement of records and materials and conversion  thereof to
a successor administrator shall be borne by the Co-Administrators,  and the Fund
shall not be responsible for the  Co-Administrators'  costs associated with such
termination;  provided,  however, that such expenses shall not exceed $25,000 in
the event this  Agreement is not continued  after the  expiration of the Initial
Term or any Renewal Term. In the event this  Agreement is terminated by the Fund
pursuant to any other  provision  of this  Agreement,  all  reasonable  expenses
associated  with conversion to a successor  administrator  shall be borne by the
Fund.

     12.8 Notwithstanding  anything contained in this Agreement to the contrary,
unless this  Agreement  is  terminated  pursuant to Section 12.5 or Section 12.6
hereof,   should   the  Fund  move  any  of  the   services   provided   by  the
Co-Administrators  hereunder to a successor  service provider during the Initial
Term, or should, during the Initial Term, all or substantially all of the Fund's
assets be merged with or purchased by another  entity which does not utilize the
services of the  Co-Administrators,  the Co-Administrators  shall be entitled to
receive fees from the Fund for the period from the date of such movement, merger
or purchase until the end of the Initial Term (the "Unexpired  Term").  The fees
payable  for  the  Unexpired  Term  shall  be  accelerated  to the  date of such
movement,  merger or purchase and shall be calculated in accordance with Section
6.3 herein at the asset  levels on such date.  The  expense  reimbursements  set
forth in Section 6.5 hereof shall not apply to the Unexpired Term.

Article  13       Additional Portfolios.

     In the event that the Fund  establishes  one or more Portfolios in addition
to those identified in Schedule A with respect to which the Fund desires to have
the  Co-Administrators  render services as administrator under the terms hereof,
the  Fund  shall  so  notify  the  Co-Administrators  in  writing,  and  if  the
Co-Administrators agree in writing to provide such services, Schedule A shall be
deemed amended to include such additional Portfolios.

Article  14       Confidentiality.

     14.1 The parties agree that the Proprietary  Information (defined below) is
confidential information of the parties and their respective licensers. The Fund
and the  Co-Administrators  shall exercise at least the same degree of care, but
not  less  than  reasonable  care,  to  safeguard  the  confidentiality  of  the
Proprietary  Information  of each other as they would  exercise to protect their
own  Proprietary  Information.  The Fund and the  Co-Administrators  may use the
Proprietary  Information  only to exercise  their  respective  rights or perform
their respective  duties under this Agreement.  Except as otherwise  required by
law, the Fund and the Co-Administrators shall not duplicate, sell or disclose to
others the Proprietary  Information of the other,  in whole or in part,  without
the  prior  written   permission  of  the  affected  party.  The  Fund  and  the
Co-Administrators  may,  however,  disclose  Proprietary  Information  to  their
respective  employees  who have a need to know the  Proprietary  Information  to
perform  work for the other,  provided  that the Fund and the  Co-Administrators
shall use reasonable  efforts to ensure that the Proprietary  Information is not
duplicated  or  disclosed  by  their  respective  employees  in  breach  of this
Agreement.  The Fund and the Co-Administrators may also disclose the Proprietary
Information  to independent  contractors,  auditors and  professional  advisors,
provided they first agree in writing to be bound by confidentiality  obligations
substantially  similar  to  this  Section  14.1.  Notwithstanding  the  previous
sentence,  in no event shall either the Fund or the  Co-Administrators  disclose
the  Proprietary  Information to any  competitor of the other without  specific,
prior written consent.

     14.2 Proprietary Information means:

     (a) any data or information that is competitively  sensitive material,  and
not generally known to the public,  including,  but not limited to,  information
about  product  plans,  marketing  strategies,   finance,  operations,  customer
relationships,  customer profiles, sales estimates, business plans, and internal
performance  results relating to the past, present or future business activities
of  the  Fund  or  the  Co-Administrators,  their  respective  subsidiaries  and
affiliated companies and the customers, clients and suppliers of any of them;

     (b) any scientific or technical information,  design,  process,  procedure,
formula or  improvement  that is  commercially  valuable and secret in the sense
that its confidentiality affords the Fund or the Co-Administrators a competitive
advantage over their competitors;

     (c) all confidential or proprietary concepts, documentation, reports, data,
specifications,  computer  software,  source  code,  object  code,  flow charts,
databases,  inventions,  know-how,  show-how and trade  secrets,  whether or not
patentable or copyrightable;

     (d) all  documents,  inventions,  substances,  engineering  and  laboratory
notebooks,  drawings, diagrams,  specifications,  bills of material,  equipment,
prototypes and models, and any other tangible  manifestation of the foregoing of
any party hereto which now exist or come into the control or  possession  of the
other; and

     (e) with respect to the Fund, all records and other information relative to
the Fund and its prior,  present or potential  shareholders (and clients of such
shareholders).

     14.3 The obligations of confidentiality and restriction on use herein shall
not apply to any Proprietary Information that a party proves:

     (a) Was in the  public  domain  prior  to the  date of  this  Agreement  or
subsequently came into the public domain through no fault of such party; or

     (b) Was  lawfully  received  by the party  from a third  party  free of any
obligation of confidence to such third party; or

     (c) Was already in the  possession  of the party prior to receipt  thereof,
directly or indirectly, from the other party; or

     (d) Is required to be disclosed in a judicial or administrative  proceeding
after  all  reasonable  legal  remedies  for  maintaining  such  information  in
confidence have been exhausted  including,  but not limited to, giving the other
party as much advance notice of the  possibility of such disclosure as practical
so the other party may attempt to stop such  disclosure  or obtain a  protective
order concerning such disclosure; or

     (e) Is subsequently and independently  developed by employees,  consultants
or  agents  of  the  party  without  reference  to the  Proprietary  Information
disclosed under this Agreement.

     14.4  Notwithstanding the foregoing,  it is hereby understood and agreed by
the  parties  hereto  that  any  marketing  strategies,   customer  profiles  or
administrative,  business  or  shareholder  servicing  plans  or  similar  items
prepared or developed by the Co-Administrators for the benefit of the Fund shall
be  considered  the  Proprietary  Information  of the Fund and  nothing  in this
Agreement  shall be construed  to prevent or prohibit  the Fund from  disclosing
such Proprietary Information to a successor administrator.

     14.5 The  obligations  of the parties  hereto  under this  Article 14 shall
survive the termination of this Agreement.

Article  15       Force Majeure.

     No party shall be liable for any default or delay in the performance of its
obligations  under this  Agreement if and to the extent such default or delay is
caused, directly or indirectly,  by circumstances beyond such party's reasonable
control.  In any such event, the non-performing  party shall be excused from any
further  performance  and observance of the  obligations so affected only for as
long as such circumstances  prevail and such party continues to use commercially
reasonable   efforts  to  recommence   performance  or  observance  as  soon  as
practicable.

Article  16       Assignment and Subcontracting.

     This  Agreement,  its  benefits and  obligations  shall be binding upon and
inure to the benefit of the parties hereto and their  respective  successors and
permitted assigns.  This Agreement may not be assigned or otherwise  transferred
by any party  hereto  without the prior  written  consent of the other  parties;
provided,  however, that each party may, in its sole discretion,  assign all its
right, title and interest in this Agreement to an entity controlling, controlled
by, or under common control with,  such party,  provided that, in the reasonable
judgment  of the Board of  Directors  determine  in its sole  discretion  within
ninety  (90)  days of  receiving  written  notice  of such  assignment:  (i) the
financial capacity of a Co-Administrator's  assignee is not materially less than
that of the Co-Administrator;  (ii) the nature and quality of the services to be
provided hereunder are not materially adversely affected by such assignment; and
(iii)  the  quality  and  capability  of  the  personnel  and  facilities  of  a
Co-Administrator's   assignee  are  not  materially   less  than  those  of  the
Co-Administrator.  The Co-Administrators  may, in their sole discretion,  engage
subcontractors  to  perform  any  non-material  or  non-substantive  obligations
contained  in this  Agreement  that  they  are  otherwise  required  to  perform
hereunder,  provided that the  Co-Administrators  shall be  responsible  for all
compensation payable to such subcontractors and shall remain responsible for the
acts  and  omissions  of  such  subcontractors  to  the  same  extent  that  the
Co-Administrators are hereunder.

Article  17       Notice.

     Any notice or other instrument  authorized or required by this Agreement to
be given in  writing  to the Fund or a  Co-Administrator  shall be  sufficiently
given if  addressed  to a party and received by it at its office set forth below
or at such other place as it may from time to time designate in writing.

                  To the Fund:

                  James D. Grassi, Esq.
                  The Northern Trust Company
                  50 South LaSalle Street - M-9
                  Chicago, IL  60675

                  with a copy to:

                  W. Bruce McConnel, III, Esq.
                  Philadelphia National Bank Building
                  1345 Chestnut Street
                  Philadelphia, PA  19107

                  To Northern:

                  James D. Grassi, Esq.
                  The Northern Trust Company
                  50 South LaSalle Street - M-9
                  Chicago, IL  60675

                  To Investor Services Group:

                  First Data Investor Services Group, Inc.
                  4400 Computer Drive
                  Westboro, Massachusetts  01581
                  Attention:  President

                  with a copy to Investor Services Group's General Counsel

Article  18       Governing Law/Venue.

     The  laws of the  Commonwealth  of  Massachusetts,  excluding  the  laws on
conflicts of laws, shall govern the interpretation, validity, and enforcement of
this  Agreement  (except as to Article 24 hereof  which  shall be  construed  in
accordance with the laws of the State of Delaware).  All actions arising from or
related  to this  Agreement  shall be brought  in the state and  federal  courts
sitting in the City of Boston,  and the parties hereby submit  themselves to the
exclusive jurisdiction of those courts.

Article  19       Counterparts.

     This Agreement may be executed in any number of counterparts, each of which
shall be  deemed  to be an  original;  but such  counterparts  shall,  together,
constitute only one instrument.

Article  20       Captions.

     The captions of this  Agreement are included for  convenience  of reference
only and in no way  define or limit any of the  provisions  hereof or  otherwise
affect their construction or effect.

Article  21       Publicity.

     No party shall  release or publish  news  releases,  public  announcements,
advertising or other publicity relating to this Agreement or to the transactions
contemplated  by it without the prior  review and written  approval of the other
parties;  provided,  however,  that a party  may make  such  disclosures  as are
required by legal, accounting or regulatory requirements after making reasonable
efforts in the circumstances to consult in advance with the other parties.

Article  22       Relationship of Parties.

     The Co-Administrators  agree that they are independent  contractors and not
partners or co-venturers  and nothing  contained  herein shall be interpreted or
construed otherwise.

Article  23       Entire Agreement; Severability.

     23.1  This  Agreement,   including  all  Schedules  and  Exhibits   hereto,
constitutes the entire Agreement between the parties with respect to the subject
matter  hereof  and   supersedes  all  prior  and   contemporaneous   proposals,
agreements,  contracts,  representations and understandings,  whether written or
oral,  between the parties with respect to the subject matter hereof. No change,
termination,  modification  or waiver of any term or condition of the  Agreement
shall be valid unless in writing signed by each party.  No such writing shall be
effective as against Investor  Services Group unless said writing is executed by
a Senior Vice  President,  Executive  Vice  President  or  President of Investor
Services  Group.  No such writing  shall be effective as against the Fund unless
said  writing is executed by the  Chairman  of the Board of  Directors.  No such
writing shall be effective as against  Northern  unless said writing is executed
by the Vice  President,  Senior Vice  President,  Executive  Vice  President  or
President of Northern.  A party's waiver of a breach of any term or condition in
the Agreement shall not be deemed a waiver of any subsequent  breach of the same
or another term or condition.

     23.2 The parties intend every  provision of this Agreement to be severable.
If a court of competent  jurisdiction  determines  that any term or provision is
illegal or invalid for any reason, the illegality or invalidity shall not affect
the validity of the remainder of this Agreement. In such case, the parties shall
in good faith modify or substitute  such provision  consistent with the original
intent of the parties.  Without limiting the generality of this paragraph,  if a
court  determines  that any remedy  stated in this  Agreement  has failed of its
essential  purpose,  then all other  provisions of this  Agreement  shall remain
fully effective.

Article  24       Board Member and Shareholder Liability.

     This Agreement is executed by or on behalf of the Fund with respect to each
of the Portfolios and the obligations  hereunder are not binding upon any of the
Board Members, officers or shareholders of the Fund individually but are binding
only upon the  Portfolio  to which such  obligations  pertain and the assets and
property of such  Portfolio.  All  obligations  of the Fund under this Agreement
shall  apply  only on a  Portfolio-by-Portfolio  basis,  and the  assets  of one
Portfolio shall not be liable for the obligations of another Portfolio.

     IN WITNESS  WHEREOF,  the parties  hereto have caused this  Agreement to be
duly executed all as of the Effective Date.


                      NORTHERN INSTITUTIONAL FUNDS

                       By:     /s/ William H. Springer

                       Name:

                       Title:



                       THE NORTHERN TRUST COMPANY

                       By:     /s/ Archibald E. King

                       Name:   Archibald E. King

                       Title:  Vice President



                       FIRST DATA INVESTOR SERVICES GROUP, INC.

                        By:     /s/ Jylanne M. Dunne

                        Name:   Jylanne Dunne

                        Title:  Senior Vice President



                                   SCHEDULE A

                               LIST OF PORTFOLIOS


Non-International Portfolios:

Government Select Portfolio
Government Portfolio
Diversified Assets Portfolio
Tax-Exempt Portfolio
U.S. Government Securities Portfolio
Short-Intermediate Bond Portfolio
U.S. Treasury Index Portfolio
Bond Portfolio
Intermediate Bond Portfolio
Balanced Portfolio
Equity Index Portfolio
Diversified Growth Portfolio
Focused Growth Portfolio
Small Company Index Portfolio


International Portfolios:

International Bond Portfolio
International Equity Index Portfolio
International Growth Portfolio


                                   SCHEDULE B

                         DUTIES OF THE CO-ADMINISTRATORS

     (a)  Maintaining  office  facilities  (which  may  be in the  offices  of a
Co-Administrator or a corporate affiliate) and furnishing corporate officers for
the Fund;

     (b) Furnishing data processing services,  clerical services,  and executive
and administrative services and standard stationery and office supplies;

     (c)  Performing  all  functions  ordinarily  performed  by the  office of a
corporate  treasurer,  and  furnishing  the services and  facilities  ordinarily
incident thereto, as follows:

     Expense  accrual  monitoring  and  payment of the Fund's  bills,  preparing
     monthly   reconciliation   of  the  Fund's  expense  records  and  updating
     projections of annual expenses

     Determining dividends

     Calculating yields and total returns

     Preparing  materials  for review by the Board of Directors,  e.g.,  written
     reports pursuant to Rules 2a-7, 10f-3, 17a-7, 17e-1 and 144A and the Fund's
     applicable procedures

     Tax and financial counsel

     Creating expense pro formas for new Portfolios/classes

     Reporting  Fund  statistical  information to investment  company  reporting
     agencies and associations (e.g., Lipper Analytical  Services,  Inc. and the
     Investment Company Institute)

     Compliance testing (e.g., to test compliance with applicable  provisions of
     the Prospectus, 1940 Act and Internal Revenue Code)

     (d) Preparing and  submitting  reports to the Fund's  shareholders  and the
Commission  including,  but not  necessarily  limited  to,  Annual  Reports  and
Semi-Annual Reports on Form N-SAR;

     (e) Preparing and printing financial statements;

     (f) Preparing monthly Portfolio profile reports;

     (g)  Preparing and filing the Fund's  federal and state tax returns  (other
than those required to be filed by the Fund's  custodian and transfer agent) and
providing shareholder tax information to the Fund's transfer agent;

     (h) Assisting the Fund's investment  adviser,  at the adviser's request, in
monitoring and developing compliance procedures for the Fund which will include,
among other matters,  procedures to assist the adviser in monitoring  compliance
with each Portfolio's investment objective, policies,  restrictions, tax matters
and applicable laws and regulations;

     (i) Assisting in marketing strategy and product development;

     (j)  Performing   oversight/management   responsibilities,   including  the
following:

     Supervision and coordination of transfer agent

     Supervision and coordination of IRA custodian

     Supervision and coordination of Fund custodian

     Vendor management and invoicing

     Daily report coordination

     Media relations

     Sales literature forms and development

     Fund operations coordination

     Management of auditor relationship

     Oversight of Portfolio compliance and tax function

     (k) Performing "blue sky" compliance functions, as follows:

     Effecting and  maintaining,  as the case may be, the registration of Shares
     of the Fund for sale under the securities laws of the jurisdictions  listed
     in the Written  Instructions of the Fund, which  instructions  will include
     the amount of Shares to be registered  as well as the warning  threshold to
     be maintained.

     Filing  with  each  appropriate   jurisdiction  the  appropriate  materials
     relating to the Fund.

     Providing  to  the  Fund  quarterly  reports  of  sales  activity  in  each
     jurisdiction in accordance with the Written Instructions of the Fund. Sales
     will be reported by shareholder residence.  NSCC trades and order clearance
     will be reported by the state  provided by the dealer at the point of sale.
     Trades by omnibus  accounts  will be reported by trustee state of residence
     in  accordance  with the Written  Instructions  of the Fund  outlining  the
     entities which are permitted to maintain omnibus positions with the Fund.

     In the event sales of Shares in a particular  jurisdiction  reach or exceed
     the warning levels  provided in the Written  Instructions  of the Fund, the
     Co-Administrators  will promptly notify the Fund with a  recommendation  of
     the amount of Shares to be registered in such  jurisdiction and the fee for
     such  registration.  The  Co-Administrators  will not  register  additional
     Shares in such jurisdiction  unless and until the  Co-Administrators  shall
     have received Written Instructions to do so.

     If the  Co-Administrators are instructed by the Fund not to register Shares
     in a particular  jurisdiction,  the  Co-Administrators  will use their best
     efforts to cause any sales in such  jurisdictions  to be blocked,  and such
     sales will not be reported to the  Co-Administrators  as sales of Shares of
     the Fund.

     (l) Performing corporate secretarial services including the following:

     Assist in maintaining corporate records and good standing status of Fund in
     its state of organization

     Develop and maintain  calendar of annual and quarterly  board approvals and
     regulatory filings

     Prepare notice, agenda, memoranda, resolutions and background materials for
     legal  approvals  at quarterly  and special  board  meetings and  committee
     meetings;  assemble and distribute  board  materials for board meetings and
     committee meetings;  attend meetings; make presentations where appropriate;
     prepare  minutes;  follow up on issues;  prepare such  periodic and special
     reports as the Board Members may reasonably request

     Provide support for written consent votes where needed

     (m) Monitoring the Fund's arrangements with respect to services provided by
institutions  ("Servicing  Agents") to their  customers  who are the  beneficial
owners of Shares,  pursuant to agreements  ("Servicing  Agreements") between the
Fund and such Servicing Agents including:

     Review  the  qualifications  of  Servicing  Agents  wishing  to enter  into
     Servicing Agreements

     Assist in the execution and delivery of Servicing Agreements

     Report  to the Board of  Directors  with  respect  to the  amounts  paid or
     payable by the Fund from time to time under the  Servicing  Agreements  and
     the nature of the services provided by Servicing Agents

     Maintain appropriate records in connection with their monitoring duties

     (n) Performing the following legal services:

     Prepare  and  file   annual   Post-Effective   Amendments   to  the  Fund's
     Registration Statement

     Prepare and file Rule 24f-2 Notices

     Prepare and file Forms N-SAR

     Prepare and file Annual and Semi-Annual Financial Reports

     Communicate  significant  regulatory or  legislative  developments  to Fund
     management and Board Members and provide related planning  assistance where
     needed

     Consult  with  Fund  management  regarding  portfolio  compliance  and Fund
     corporate and regulatory issues as needed

     Maintain effective communication with outside counsel

     Arrange D&O/E&O insurance and fidelity bond coverage for Fund

     Assist in monitoring Fund Code of Ethics reporting and provide such reports
     to the person designated under the Fund's Code

     Monitor   handling  of  litigation  by  outside   counsel  and  non-routine
     regulatory matters

     Assist  in  managing  Commission  audits  of the  Fund  at  the  investment
     adviser's principal place of business

     Review sales material and advertising for Fund Prospectus compliance

     Assist in  developing  compliance  guidelines  and  procedures  to  improve
     overall compliance by Fund and service providers

     Prepare compliance manuals

     (o) Performing,  in accordance  with the Written  Instructions of the Fund,
Special Legal Services in accordance  with the pricing  structure  listed on the
Fee Schedule  attached to this Agreement as Schedule C. Examples of such Special
Legal Services are:

     Assist in new Portfolio start-up (to the extent requested):
          Coordinate time and responsibility  schedules
          Prepare Fund corporate  documents
          Draft/file registration  statement  (including  investment
          objectives/policies and prospectuses)
          Respond to and negotiate  Commission  comments
          Draft notice, agenda and resolutions for  organizational  meeting;
          attend board meeting;
          make  presentations  where  appropriate;
          prepare  minutes and follow up on issues

          Prepare proxy materials for special meetings of shareholders
          (including fund merger documents)

          Prepare Post-Effective  Amendments for special purposes (e.g.,
          new funds or classes, changes in advisory relationships, mergers,
          restructurings)

          Assist in extraordinary non-recurring projects, including providing
          consultative legal services, such as:

                            Arrange CDSC financial programs
                            Prospectus simplification
                            Profile prospectuses
                            Exemptive order applications
                            Requests for no-action letters


                             EXHIBIT 1 TO SCHEDULE B
                              PERFORMANCE STANDARDS

     The  Co-Administrators'   obligation  to  meet  the  following  Performance
Standards  shall be measured in the aggregate  with respect to all Portfolios of
the Fund.

     The  Co-Administrators  will  report  to the Fund on a  monthly  basis  the
percent  of  items  completed  within  standard  as  well as a  quality  rating.
Reporting  will  be  detailed  to  the  transaction   type  level.  A  pass/fail
determination  for contractual  penalties will be based on the categories listed
below. Note that completion standards are measured in business days.

Fund Administration (Treasury and Reporting)/Tax/Compliance

The following standards will be met 100% of the time:

     All Commission and Internal Revenue Service ("IRS") regulatory requirements
will be met according to the deadlines set forth by the Commission and the IRS

     Notification to the Fund's investment  adviser within two (2) business days
with  compliance  violations  based on procedures  established  by and among the
Co-Administrators and the Fund

     Directors & Officers Errors & Omissions Insurance Coverage will be reviewed
annually

     Rule  17g-1  Fidelity  Bond  filings  will  be  made  as  required  by  the
regulations of the Commission

The following standard will be met 98% of the time:

     Code of  Ethics  reporting  forms  will be  circulated  at least  seven (7)
business days before each quarter end

Blue Sky

The following standards will be met 98% of the time:

     Annual renewal filings will be submitted at least thirty (30) business days
prior to expiration

     Filings of Prospectus and Annual  Reports will be submitted  within fifteen
(15) business days of printing/release

Legal Administration

     The  following  standards  will be met 98% of the  time  as  measured  on a
quarterly basis:

     Board  materials will be sent to the Fund for review at least fourteen (14)
business  days  prior  to  the  Board  meeting,   provided  that  all  requested
information has been received by the  Co-Administrators  within agreed-upon time
frames

     Board  materials  will be sent to the  Board  Members  at least  seven  (7)
business  days  prior  to  the  Board  meeting,   provided  that  all  requested
information has been received by the  Co-Administrators  within agreed-upon time
frames

     Timely submission of sales literature to NASD, provided that copies of such
materials are provided to the  Co-Administrators or their affiliates on a timely
basis



                                   SCHEDULE C

                                  FEE SCHEDULE

     For the services  rendered,  expenses  assumed,  facilities  furnished  and
payments made by the Co-Administrators,  as provided for in this Agreement,  the
Fund, on behalf of each Portfolio, on the first business day of each month, will
pay to Northern,  as agent for itself and Investor Services Group, a fee for the
previous month at the annualized rates listed below.

1.       Standard Annual Fees:      Non-International Portfolios:
                              .10% of each Portfolio's average daily net assets

                                            International Portfolios:
                               .15% of each Portfolio's average daily net assets

         The foregoing fee will be computed based on net assets on each day.

     2. Fees for Special Legal Services: The Co-Administrators shall be entitled
to the  following  fee for the  performance  of any  Special  Legal  Services as
described in Schedule B in accordance with the Written Instructions of the Fund:
$185 per  hour  subject  to  certain  project  caps as may be  agreed  to by the
Co-Administrators and the Fund. Services and charges may vary based on volume.



                                   SCHEDULE D

                                 FUND DOCUMENTS

     Certified copy of the Articles of Incorporation of the Fund

     Certified copy of the By-Laws of the Fund

     Copy of the resolution of the Board of Directors  authorizing the execution
and delivery of this Agreement

     Copies of all agreements between the Fund and its service providers

     A listing of all  jurisdictions  in which each  Portfolio is registered and
lawfully available for sale as of the date of this Agreement and all information
relative  to the  monitoring  of sales and  registrations  of the Shares in such
jurisdictions

     The  Fund's  most  recent  post-effective  amendment  to  its  registration
statement

     The Fund's Prospectus


                                                                  Exhibit (j)(1)



                  CONSENT DRINKER BIDDLE & REATH LLP OF COUNSEL



     We hereby  consent to the use of our name and to the references to our Firm
under the caption  "Additional  Trust Information - Counsel and Auditors" in the
Statement of Additional Information included in Post-Effective  Amendment No. 40
to the Registration  Statement on Form N-1A under the Securities Act of 1933, as
amended (the "1933 Act"), of Northern Institutional Funds (File Nos. 2-80543 and
811-3605).  This consent does not  constitute a consent  under  section 7 of the
1933 Act, and in  consenting  to the use of our name and the  references  to our
Firm  under  such  caption we have not  certified  any part of the  Registration
Statement  and do not  otherwise  come within the  categories  of persons  whose
consent is required  under said  section 7 or the rules and  regulations  of the
Securities and Exchange Commission thereunder.



                                                /s/ Drinker Biddle & Reahth LLP
                                                    Drinker Biddle & Reath LLP

Philadelphia, Pennsylvania
August 5, 1999







                                                                  Exhibit (j)(2)

                         CONSENT OF INDEPENDENT AUDITORS


     We consent to the  reference  to our firm under the  captions  "Counsel and
Auditors" in the  Registration  Statement (Form N-1A) of Northern  Institutional
Funds filed with the Securities and Exchange  Commission in this  Post-Effective
Amendment No. 40 to the Registration  Statement under the Securities Act of 1933
(Registration  No.  2-80543) and in this  Amendment  No. 41 to the  Registration
Statement under the Investment Company Act of 1940 (Registration No. 811-3605).



         /s/  ERNST & YOUNG LLP


Chicago, Illinois
August 5, 1999



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