59 WALL STREET TRUST
497, 1998-11-06
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                                     [LOGO]

                            U.S. Treasury Money Fund

                                   PROSPECTUS

                                November 1, 1998

<PAGE>

================================================================================

PROSPECTUS

                   The 59 Wall Street U.S. Treasury Money Fund

                   21 Milk Street, Boston, Massachusetts 02109

================================================================================

      The 59 Wall Street  U.S.  Treasury  Money Fund is an  open-end  investment
company which is a separate  diversified  portfolio of The 59 Wall Street Trust.
Shares of the Fund are offered by this Prospectus.

      The Fund is a type of mutual fund  commonly  known as a money market fund.
It is designed to be a cost effective and convenient means of making substantial
investments in money market instruments.  The Fund's investment  objective is to
achieve as high a level of current income as is consistent with the preservation
of capital and the maintenance of liquidity.  The net asset value of each of the
Fund's shares is expected to remain constant at $1.00. There can be no assurance
that the investment objective of the Fund will be achieved or that the net asset
value per share will not vary.

      Investments  in the Fund are neither  insured nor  guaranteed  by the U.S.
Government. Shares of the Fund are not deposits or obligations of, or guaranteed
by, Brown Brothers Harriman & Co., and the shares are not insured by the Federal
Deposit Insurance Corporation or any other federal,  state or other governmental
agency.

      The  Trust  seeks  to  achieve  the  investment  objective  of the Fund by
investing  only in  short-term  securities  backed as to principal  and interest
payments by the full faith and credit of the United States of America.  Although
investments held for the Fund are issued by the U.S.  Government,  an investment
in the Fund is not insured or guaranteed by the U.S. Government.

      Dividends  from the  Fund  which  are  derived  from  interest  on  direct
obligations  of the U.S.  Government  are  generally  expected to be exempt from
state and local income taxes in all states.  However,  a shareholder of the Fund
is subject to federal income tax on the dividends and capital gain distributions
received from the Fund.

      Brown  Brothers  Harriman  & Co. is the  investment  adviser  to,  and the
administrator  and shareholder  servicing agent of the Fund.  Shares of the Fund
are offered at net asset value without a sales charge.

      This Prospectus, which investors are advised to read and retain for future
reference,   sets  forth  concisely  the  information  about  the  Fund  that  a
prospective  investor  ought to know before  investing.  Additional  information
about the Fund has been filed with the Securities  and Exchange  Commission in a
Statement of Additional Information, dated November 1, 1998. This information is
incorporated  herein by reference and is available  without  charge upon request
from the Fund's distributor, 59 Wall Street Distributors,  Inc., 21 Milk Street,
Boston, Massachusetts 02109.

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

THESE  SECURITIES  HAVE NOT BEEN APPROVED OR  DISAPPROVED  BY THE SECURITIES AND
EXCHANGE COMMISSION OR ANY STATE SECURITIES  COMMISSION,  NOR HAS THE SECURITIES
AND  EXCHANGE  COMMISSION  OR ANY STATE  SECURITIES  COMMISSION  PASSED UPON THE
ACCURACY OR ADEQUACY OF THIS PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.

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

                The date of this Prospectus is November 1, 1998.

<PAGE>

                               TABLE OF CONTENTS

                                                                            Page
                                                                            ----

Expense Table............................................................     3
Financial Highlights.....................................................     4
Investment Objective and Policies........................................     4
Investment Restrictions..................................................     6
Purchase of Shares.......................................................     6
Redemption of Shares.....................................................     7
Management of the Trust .................................................     8
Net Asset Value..........................................................    11
Dividends and Distributions..............................................    12
Taxes....................................................................    12
Description of Shares....................................................    14
Additional Information ..................................................    15

                          TERMS USED IN THIS PROSPECTUS

Trust ........................   The 59 Wall Street Trust
Fund .........................   The 59 Wall Street U.S. Treasury Money Fund
Investment Adviser
  and Administrator...........   Brown Brothers Harriman & Co.
Subadministrator..............   59 Wall Street Administrators, Inc.
                                     ("59 Wall Street Administrators")
Distributor...................   59 Wall Street Distributors, Inc.
                                     ("59 Wall Street Distributors")
1940 Act......................   The Investment Company Act of 1940, as amended.


                                       2
<PAGE>

EXPENSE TABLE
================================================================================

     The following table provides (i) a summary of estimated  expenses  relating
to purchases and sales of shares of the Fund, and the aggregate annual operating
expenses of the Fund,  as a  percentage  of average net assets of the Fund,  and
(ii) an example  illustrating  the dollar cost of such  estimated  expenses on a
$1,000 investment in the Fund.

                        SHAREHOLDER TRANSACTION EXPENSES

Sales Load Imposed on Purchases.........................................   None
Sales Load Imposed on Reinvested Dividends..............................   None
Deferred Sales Load.....................................................   None
Redemption Fee..........................................................   None

                         ANNUAL FUND OPERATING EXPENSES
                     (as a percentage of average net assets)

Investment Advisory Fee.....................................               0.15%
12b-1 Fee...................................................               None
Other Expenses
  Administration Fee .......................................    0.100%
  Shareholder Servicing/Eligible Institution Fee............    0.225
  Other Expenses............................................    0.076       0.41
                                                                -----       ----
Total Fund Operating Expenses...............................               0.56%
                                                                           ==== 

             Example                          1 year  3 years  5 years  10 years
             -------                          ------  -------  -------  --------
A shareholder of the Fund would pay the
  following   expenses   on   a  $1,000
  investment, assuming  (1)  5%  annual
  return,  and  (2)  redemption  at the
  end of each time period:...............       $6      $18      $31       $70
                                                --      ---      ---       ---

      The Example  should not be considered a  representation  of past or future
expenses. Actual expenses may be greater or less than those shown. In connection
with the  Example,  please  note that $1,000 is  currently  less than the Fund's
minimum purchase  requirement.  The purpose of this table is to assist investors
in  understanding  the various costs and expenses that  shareholders of the Fund
bear directly or indirectly.

      For  more  information  with  respect  to the  expenses  of the  Fund  see
"Management of the Trust" herein.


                                       3
<PAGE>

FINANCIAL HIGHLIGHTS
================================================================================

     The  following  information,  has been  audited by  Deloitte & Touche  LLP,
independent  auditors.  This information  should be read in conjunction with the
financial  statements and notes thereto,  which are incorporated by reference in
the  Statement  of  Additional  Information.  The  ratios  of  expenses  and net
investment income to average net assets are not indicative of future ratios.

<TABLE>
<CAPTION>
                                                                                                          For the period
                                                                                                           March 12, 1991
                                                     For the years ended June 30,                          (commencement
                             ---------------------------------------------------------------------------   of operations)
                               1998       1997       1996        1995       1994       1993       1992    to June 30, 1991
                             --------   --------   --------    --------   --------   --------   --------  ----------------
<S>                          <C>        <C>        <C>         <C>        <C>        <C>        <C>          <C>
Net asset value,
  beginning of period......  $   1.00   $   1.00   $   1.00    $   1.00   $   1.00   $   1.00   $   1.00     $   1.00
Income from investment
  operations:
  Net investment income....      0.05       0.04       0.05        0.05       0.03       0.03       0.04         0.02
  Dividends to
    shareholders from
    net investment
    income.................     (0.05)     (0.04)     (0.05)      (0.05)     (0.03)     (0.03)     (0.04)       (0.02)
                             --------   --------   --------    --------   --------   --------   --------     --------
Net asset value, end of
  period...................  $   1.00   $   1.00   $   1.00    $   1.00   $   1.00   $   1.00   $   1.00     $   1.00
                             ========   ========   ========    ========   ========   ========   ========     ========
Total return*..............      4.78%      4.75%      4.96%       4.67%      2.74%      2.75%      4.48%        5.45%**
Ratios/supplemental data:
  Net assets, end of
    period (000's
    omitted)...............  $194,694   $160,458   $146,225    $144,969   $141,731   $136,584   $118,706     $ 70,241
  Ratio of expenses to
    average net assets* ...      0.56%      0.55%      0.56%       0.55%      0.55%      0.55%      0.55%        0.55%**
  Ratio of net investment
    income to average
    net assets.............      4.70%      4.65%      4.78%       4.52%      2.72%      2.70%      4.35%        5.27%**
</TABLE>

- ----------
*     Had the expense  reimbursement  agreement not been in place,  the ratio of
      expenses to average net assets,  for the years ended June 30, 1996,  1995,
      1994,  1993  and 1992 and the  period  March  12,  1991  (commencement  of
      operations) to June 30, 1991, would have been 0.57%,  0.58%, 0.57%, 0.55%,
      0.56%,  and 0.74%,  respectively.  For the same periods,  the total return
      would  have  been  4.91%,   4.64%,   2.72%,   2.75%,   4.47%,  and  5.26%,
      respectively.  The expense reimbursement  agreement terminated on February
      1, 1996.

**    Annualized.

INVESTMENT OBJECTIVE AND POLICIES
================================================================================

      The  investment  objective  of the Fund is to  achieve  as high a level of
current  income  as is  consistent  with the  preservation  of  capital  and the
maintenance of liquidity.

      The  investment  objective of the Fund is a fundamental  policy and may be
changed  only with the  approval  of the  holders of a  "majority  of the Fund's
outstanding  voting  securities" (as defined in the 1940 Act). (See  "Additional
Information" in this Prospectus.)  However,  the investment policies of the Fund
as described below are not fundamental and may be changed without such approval.

      Investments  for the Fund  mature or are deemed to mature  within 397 days
from the date of purchase and


                                       4
<PAGE>

the average maturity of the investments  held by the Fund (on a  dollar-weighted
basis) is 90 days or less.

      Assets of the Fund are invested only in securities  backed as to principal
and  interest  payments  by the full faith and  credit of the  United  States of
America.  These  securities  are  issues  of the U.S.  Treasury,  such as bills,
certificates  of  indebtedness,  notes and bonds as well as  unmatured  interest
coupons of U.S. Treasury bonds and notes which have been separated and resold in
a custodial receipt program administered by the U.S. Treasury.

      The Trust  may,  in the  future,  seek to achieve  the  Fund's  investment
objective  by  investing  all of the Fund's  assets in a  no-load,  diversified,
open-end management  investment company having substantially the same investment
objective as the Fund.  Shareholders  will receive 30 days prior written  notice
with respect to any such investment.

                                  Risk Factors

      Although  investments held for the Fund are issued by the U.S. Government,
an investment  in the Fund is not insured or guaranteed by the U.S.  Government.
The portfolio is subject to interest rate risk which causes  fluctuations in the
amount of daily  dividends,  and,  in extreme  cases,  could cause the net asset
value per share of the Fund to deviate from $1.00 per share.  Interest rate risk
refers to the price  fluctuation  of a debt  security  in response to changes in
interest  rates.  In  general,   short-term  securities  have  relatively  small
fluctuations in price in a response to general changes in interest rates.

                               Portfolio Brokerage

      Although the Fund generally holds  investments until maturity and does not
seek  profits  through  short-term  trading,  it may  dispose  of any  portfolio
security prior to its maturity if it believes such disposition advisable.

      U.S.  Treasury  securities are generally  traded on a net basis and do not
normally involve either brokerage  commissions or transfer taxes. Where possible
transactions  on  behalf of the Fund are  entered  directly  with the  issuer or
market maker for the  securities  involved.  Purchases  from dealers  serving as
market makers may include a spread  between the bid and asked price.  The policy
of the  Fund  regarding  purchases  and  sales  of  securities  is that  primary
consideration will be given to obtaining the most favorable prices and efficient
executions of  transactions.  In seeking to implement the Fund's  policies,  the
Investment  Adviser effects  transactions with those brokers and dealers who the
Investment Adviser believes provide the most favorable prices and are capable of
providing efficient  executions.  If the Investment Adviser believes such prices
and executions are obtainable  from more than one broker or dealer,  it may give
consideration to placing  portfolio  transactions with those brokers and dealers
who  furnish  research  and  other  services  to the Fund and or the  Investment
Adviser.  Such services may include,  but are not limited to, any one or more of
the following:  information as to the availability of securities for purchase or
sale;  statistical or factual  information or opinions pertaining to investment;
and  appraisals  or  evaluations  of  portfolio   securities.   (See  "Portfolio
Transactions" in the Statement of Additional Information.)

      On those  occasions when Brown Brothers  Harriman & Co. deems the purchase
or sale of a security to be in the best  interests  of the  Portfolio as well as
other  customers,  Brown  Brothers  Harriman & Co., to the extent  permitted  by
applicable  laws and  regulations,  may, but is not obligated to,  aggregate the
securities  to be sold  or  purchased  for the  Fund  with  those  to be sold or
purchased for other customers in order to obtain best execution, including lower
brokerage  commissions,  if  appropriate.  In  such  event,  allocation  of  the
securities  so  purchased  or  sold  as well  as any  expenses  incurred  in the
transaction are made by Brown Brothers Harriman & Co. in the manner it considers
to be most  equitable  and  consistent  with its  fiduciary  obligations  to its
customers, including the Fund. In some instances, this procedure might adversely
affect the Fund.


                                       5
<PAGE>

INVESTMENT RESTRICTIONS
================================================================================

      The Statement of Additional Information for the Fund includes a listing of
the  specific  investment   restrictions  which  govern  the  Fund's  investment
policies.  Certain  of these  investment  restrictions  are  deemed  fundamental
policies and may be changed only with the approval of the holders of a "majority
of the Fund's  outstanding  voting securities" (as defined in the 1940 Act) (see
"Additional Information" in this Prospectus). Excluding the investment of all of
the Fund's assets in an open-end  investment company with substantially the same
investment  objective,  policies and restrictions as the Fund, not more than 10%
of the net assets of the Fund may be invested in securities  that are subject to
legal or contractual  restrictions on resale. In addition, money is not borrowed
in an amount in excess of 331/3% of the assets of the Fund.  It is intended that
money will be borrowed only from banks and only either to  accommodate  requests
for the redemption of shares while effecting an orderly liquidation of portfolio
securities or to maintain liquidity in the event of an unanticipated  failure to
complete a portfolio security transaction or other similar situations.

      As a non-fundamental policy, up to 5% of the Fund's assets may be invested
in  repurchase  agreements  although it is the intention of the Adviser to do so
only when other means of efficiently  investing cash flows are unavailable.  All
repurchase agreement transactions are collateralized by U.S. Treasury securities
and are entered into only with "primary  dealers" (as  designated by the Federal
Reserve Bank of New York) in U.S.  Government  securities.  A shareholder of the
Fund is subject to state and local  income  taxes in most  jurisdictions  on the
portion of  dividends  received  from the Fund which is derived from income from
repurchase agreements. It is the intention of the Investment Adviser to minimize
the portion of the Fund's income which is derived from repurchase  agreements to
the extent practicable.

      The Fund is classified as  "diversified"  under the 1940 Act,  which means
that at least 75% of its total assets is represented by cash;  securities issued
by the U.S. Government, its agencies and instrumentalities; and other securities
limited in  respect  of any one  issuer to an amount no  greater  than 5% of the
Fund's total assets (other than securities  issued by the U.S.  Government,  its
agencies or instrumentalities).

PURCHASE OF SHARES
================================================================================

      Shares of the Fund are  offered on a  continuous  basis at their net asset
value  without a sales  charge.  The Trust  reserves the right to determine  the
purchase  orders for Fund shares that it will accept.  Shares of the Fund may be
purchased on any day the New York Stock Exchange is open for regular trading and
New York banks are open for business if the Trust  receives  the purchase  order
and  acceptable  payment  for such  order  prior to 12:00  P.M.,  New York time.
Purchases of Fund shares are then executed at the net asset value per share next
determined  on that same day.  Dividends are earned on the day that the purchase
is executed on the books of the Trust.

      An investor who has an account with an Eligible  Institution (see page 10)
or a Financial  Intermediary  (see page 10) may place  purchase  orders for Fund
shares  with  the  Trust   through  that  Eligible   Institution   or  Financial
Intermediary,  which  holds such  shares in its name on behalf of that  customer
pursuant  to   arrangements   made  between  that  customer  and  that  Eligible
Institution  or  Financial  Intermediary.  Each  Eligible  Institution  and each
Financial  Intermediary  may  establish  and  amend  from time to time a minimum
initial  and a  minimum  subsequent  purchase  requirement  for  its  customers.
Currently,  such minimum purchase requirements range from $1,000 to $5,000. Each
Eligible Institution or Financial  Intermediary arranges payment for Fund shares
on behalf of its  customers.  A  transaction  fee may be charged by an  Eligible
Institution or a Financial Intermediary on the purchase of Fund shares.

      An investor who does not have an account with an Eligible Institution or a
Financial Intermediary must


                                       6
<PAGE>

place  purchase  orders  for Fund  shares  with the  Trust  through  the  Fund's
Shareholder  Servicing Agent.  Such an investor has such shares held directly in
the investor's  name on the books of the Trust and is responsible  for arranging
for the payment of the purchase  price of Fund shares to the Trust's  account at
State Street Bank and Trust Company,  the Trust's  custodian  bank. Such payment
must be in the form of either (a) an  inter-bank  wire  transfer  of  "available
funds" prior to 12:00 P.M., New York time, in which case a purchase order placed
prior to 12:00  P.M.,  New York time is  executed  that day,  or (b) a cashier's
check drawn on a U.S. bank or a check  certified by a U.S. bank, in which case a
purchase  order  is  executed  after  such  a  check  has  been  converted  into
"available"  funds,  generally the next business day after the check is received
for the Trust by State Street Bank and Trust Company.  Brown Brothers Harriman &
Co.,  as the Fund's  Shareholder  Servicing  Agent,  has  established  a minimum
initial purchase  requirement for the Fund of $100,000 and a minimum  subsequent
purchase   requirement  for  the  Fund  of  $25,000.   These  minimum   purchase
requirements may be amended from time to time.

      Inquiries  regarding  the manner in which  purchases of Fund shares may be
effected and other  matters  pertaining  to the Fund should be directed to Brown
Brothers Harriman & Co., the Fund's Shareholder Servicing Agent. (See back cover
for address and phone number.)

REDEMPTION OF SHARES
================================================================================

      A  redemption  request  must be received by the Trust prior to 12:00 P.M.,
New York time on any day the New York Stock Exchange is open for regular trading
and New York banks are open for  business.  Such a redemption is executed at the
net asset  value per  share  next  determined  on that same day.  Proceeds  of a
redemption  are paid in  "available"  funds  generally on the day the redemption
request is executed, and in any event within seven days. A shareholder continues
to receive each daily  dividend  declared prior to the day on which a redemption
request is executed on the books of the Trust.

      Shares held by an Eligible  Institution  or a  Financial  Intermediary  on
behalf of a shareholder  must be redeemed  through that Eligible  Institution or
Financial  Intermediary  pursuant to arrangements  made between that shareholder
and  that  Eligible  Institution  or  Financial  Intermediary.   Proceeds  of  a
redemption are paid to that shareholder's  account at that Eligible  Institution
or Financial  Intermediary on a date established by the Eligible  Institution or
Financial  Intermediary.  A  transaction  fee  may  be  charged  by an  Eligible
Institution or a Financial Intermediary on the redemption of Fund shares.

      Shares  held  directly  in the name of a  shareholder  on the books of the
Trust may be redeemed by  submitting a  redemption  request in good order to the
Trust  through  the  Fund's  Shareholder  Servicing  Agent.  (See back cover for
address and phone number.)  Proceeds  resulting from such redemption are paid by
the Trust directly to the shareholder.

      A shareholder redeeming shares should be aware that the net asset value of
the Fund's shares may, in unusual circumstances,  decline below $1.00 per share.
Accordingly, a redemption request may result in payment of a dollar amount which
differs from the number of shares redeemed. (See "Net Asset Value".)

                            Redemptions By the Trust

      The  Fund's  Shareholder  Servicing  Agent  (see page 10),  each  Eligible
Institution  and each  Financial  Intermediary  (see page 10) may  establish and
amend from time to time for their  respective  customers a minimum account size.
If the value of a  shareholder's  holdings  in the Fund falls  below that amount
because of a redemption of shares,  the  shareholder's  remaining  shares may be
redeemed.  If such remaining  shares are to be redeemed,  the  shareholder is so
notified and is allowed 60 days to make an  additional  investment to enable the
shareholder to meet the minimum  requirement before the redemption is processed.
Brown Brothers  Harriman & Co., as the Fund's  Shareholder  Servicing Agent, has
established a minimum account size of $100,000.


                                       7
<PAGE>

                         Further Redemption Information

      In the event a shareholder redeems all shares held in the Fund at any time
during the month,  all accrued but unpaid dividends are included in the proceeds
of the redemption and future purchases of shares of the Fund by such shareholder
would be subject to the Fund's minimum initial purchase requirements.

      An  investor  should be aware  that  redemptions  from the Fund may not be
processed  if  a  completed  account   application  with  a  certified  taxpayer
identification number has not been received.

      A  shareholder's  right to receive  payment with respect to any redemption
may be suspended or the payment of the redemption  proceeds  postponed for up to
seven  days  and for  such  other  periods  as the  1940  Act may  permit.  (See
"Additional Information" in the Statement of Additional Information.)

MANAGEMENT OF THE TRUST
================================================================================

                              Trustees and Officers

      The Trustees, in addition to supervising the actions of the Administrator,
Investment Adviser and Distributor of the Fund, as set forth below,  decide upon
matters of general policy.  Because of the services rendered to the Trust by the
Investment Adviser and the Administrator, the Trust itself requires no employees
other  than  its  officers,  none of whom,  other  than  the  Chairman,  receive
compensation  from  the  Fund and all of whom,  other  than  the  Chairman,  are
employed by 59 Wall Street  Administrators.  (See "Trustees and Officers" in the
Statement of Additional Information.)

   The Trustees of the Trust are:

      J.V. Shields, Jr.
         Chairman and Chief Executive Officer of
            Shields & Company

      Eugene P. Beard
         Vice Chairman, Finance and Operations of
            The Interpublic Group of Companies

      David P. Feldman
         Retired, Chairman and Chief Executive
            Officer of AT&T Investment Management
            Corporation

      Alan G. Lowy
         Private Investor

      Arthur D. Miltenberger
         Retired, Vice President and Chief Financial
            Officer of Richard K. Mellon and Sons

                               Investment Adviser

      The  Investment  Adviser  to the Fund is Brown  Brothers  Harriman  & Co.,
Private Bankers, a New York limited partnership established in 1818. The firm is
subject to  examination  and  regulation by the  Superintendent  of Banks of the
State  of New York and by the  Department  of  Banking  of the  Commonwealth  of
Pennsylvania.  The firm is also subject to  supervision  and  examination by the
Commissioner of Banks of the Commonwealth of Massachusetts.

      Brown Brothers  Harriman & Co.  provides  investment  advice and portfolio
management  services  to the Fund.  Subject to the  general  supervision  of the
Trust's Trustees,  Brown Brothers Harriman & Co. makes the day-to-day investment
decisions  for the Fund,  places the purchase and sale orders for the  portfolio
transactions of the Fund, and generally  manages the Fund's  investments.  Brown
Brothers Harriman & Co. provides a broad range of investment management services
for  customers in the United  States and abroad.  At June 30,  1998,  it managed
total assets of approximately $30 billion.

      As  compensation  for the services  rendered and related  expenses such as
salaries of advisory  personnel borne by Brown Brothers Harriman & Co. under the
Investment Advisory  Agreement,  Brown Brothers Harriman & Co. receives from the
Fund an annual fee,  computed daily and payable  monthly,  equal to 0.15% of the
Fund's average daily net assets.  Brown Brothers Harriman & Co.


                                       8
<PAGE>

also receives an annual  administration  fee from the Fund equal to 0.10% of the
Fund's  average  daily net assets and an annual  shareholder  servicing/eligible
institution fee from the Fund equal to 0.225% of the average daily net assets of
the Fund  represented  by shares owned  during the period by customers  for whom
Brown Brothers Harriman & Co. is the holder or agent of record.

      The investment  advisory  services of Brown Brothers Harriman & Co. to the
Fund are not exclusive  under the terms of the  Investment  Advisory  Agreement.
Brown  Brothers  Harriman & Co. is free to and does render  investment  advisory
services to others, including other registered investment companies.

      Pursuant  to a license  agreement  between  the  Trust and Brown  Brothers
Harriman & Co. dated August 24,  1989,  as amended as of December 15, 1993,  the
Trust may continue to use in its name "59 Wall Street", the current and historic
address of Brown  Brothers  Harriman & Co. The  agreement  may be  terminated by
Brown Brothers  Harriman & Co. at any time upon written notice to the Trust upon
the  expiration or earlier  termination  of any  investment  advisory  agreement
between  the  Trust or any  investment  company  in which a series  of the Trust
invests all of its assets and Brown Brothers  Harriman & Co.  Termination of the
agreement would require the Trust to change its name and the name of the Fund to
eliminate all reference to "59 Wall Street".

      Pursuant to license  agreements  between Brown Brothers Harriman & Co. and
each of 59 Wall Street  Administrators  and 59 Wall Street  Distributors (each a
"Licensee"),  dated June 22, 1993 and June 8, 1990, respectively,  each Licensee
may  continue to use in its name "59 Wall  Street",  the  current  and  historic
address of Brown Brothers  Harriman & Co., only if Brown Brothers Harriman & Co.
does not terminate the  respective  license  agreement,  which would require the
Licensee to change its name to eliminate all reference to "59 Wall Street".

                                  Administrator

      Brown Brothers  Harriman & Co. acts as  Administrator  of the Trust.  (See
"Administrator" in the Statement of Additional Information.)

      In  its  capacity  as   Administrator,   Brown  Brothers  Harriman  &  Co.
administers all aspects of the Trust's  operations subject to the supervision of
the  Trust's  Trustees  except  as  set  forth  below  under  "Distributor".  In
connection with its  responsibilities  as Administrator  and at its own expense,
Brown  Brothers  Harriman & Co. (i)  provides  the Trust  with the  services  of
persons  competent  to perform  such  supervisory,  administrative  and clerical
functions as are necessary in order to provide  effective  administration of the
Trust; (ii) oversees the performance of administrative and professional services
to the Trust by others,  including the Fund's  Custodian,  Transfer and Dividend
Disbursing  Agent;  (iii)  provides  the Trust with  adequate  office  space and
communications  and other facilities;  and (iv) prepares and/or arranges for the
preparation,  but  does  not pay  for,  the  periodic  updating  of the  Trust's
registration statement and the Fund's prospectus, the printing of such documents
for the purpose of filings with the Securities and Exchange Commission and state
securities administrators,  and the preparation of tax returns for the Trust and
for the Fund and  reports  to the Fund's  shareholders  and the  Securities  and
Exchange Commission.

      For the services rendered to the Trust and related expenses borne by Brown
Brothers  Harriman  & Co.,  as  Administrator,  Brown  Brothers  Harriman  & Co.
receives from the Fund an annual fee, computed daily and payable monthly,  equal
to 0.10% of the Fund's average daily net assets.

      Pursuant to a  Subadministrative  Services  Agreement  with Brown Brothers
Harriman & Co., 59 Wall Street  Administrators  performs such  subadministrative
duties for the Trust as are from time to time  agreed upon by the  parties.  The
offices of 59 Wall Street Administrators are located at 21 Milk Street,  Boston,
Massachusetts 02109. 59 Wall Street Administrators is a wholly-owned  subsidiary
of Signature  Financial Group,  Inc.  ("SFG").  SFG is not affiliated with Brown
Brothers Harriman & Co. 59 Wall Street Administrators'  subadministrative duties
may include providing equipment and clerical personnel necessary for maintaining
the  organization  of the Trust,  participation  in the preparation of documents


                                       9
<PAGE>

required  for  compliance  by the Trust with  applicable  laws and  regulations,
preparation  of certain  documents in  connection  with meetings of Trustees and
shareholders of the Trust, and other functions that would otherwise be performed
by the  Administrator as set forth above. For performing such  subadministrative
services,  59 Wall Street  Administrators  receives such compensation as is from
time  to  time  agreed  upon,  but  not in  excess  of the  amount  paid  to the
Administrator from the Fund.

                           Shareholder Servicing Agent

      The Trust has entered into a shareholder  servicing  agreement  with Brown
Brothers  Harriman & Co.  pursuant  to which Brown  Brothers  Harriman & Co., as
agent for the Fund, among other things:  answers  inquiries from shareholders of
and prospective  investors in the Fund regarding account status and history, the
manner in which  purchases  and  redemptions  of Fund shares may be effected and
certain  other  matters  pertaining  to the Fund;  assists  shareholders  of and
prospective  investors in the Fund in designating and changing dividend options,
account designations and addresses;  and provides such other related services as
the Trust or a shareholder of or prospective investor in the Fund may reasonably
request.  For these  services,  Brown Brothers  Harriman & Co. receives from the
Fund an annual fee,  computed daily and payable monthly,  equal to 0.225% of the
average  daily net assets of the Fund  represented  by shares  owned  during the
period for which payment was being made by  shareholders  who did not hold their
shares with an Eligible Institution.

                            Financial Intermediaries

      From time to time,  the Fund's  Shareholder  Servicing  Agent  enters into
contracts with banks,  brokers and other  financial  intermediaries  ("Financial
Intermediaries")  pursuant to which a customer of the Financial Intermediary may
place purchase orders for Fund shares through that Financial  Intermediary which
holds  such  shares  in its name on behalf of that  customer.  Pursuant  to such
contract,  each Financial  Intermediary as agent with respect to shareholders of
and  prospective  investors  in the Fund  who are  customers  of that  Financial
Intermediary, among other things: provides necessary personnel and facilities to
establish and maintain certain  shareholder  accounts and records enabling it to
hold,  as agent,  its  customers'  shares in its name or its nominee name on the
shareholder records of the Trust;  assists in processing purchase and redemption
transactions;  arranges for the wiring of funds; transmits and receives funds in
connection  with  customer  orders to  purchase  or  redeem  shares of the Fund;
provides periodic  statements  showing a customer's  account balance and, to the
extent  practicable,  integrates such information  with  information  concerning
other customer  transactions  otherwise  effected with or through it; furnishes,
either  separately  or on an  integrated  basis  with  other  reports  sent to a
customer,  monthly and annual  statements and confirmations of all purchases and
redemptions of Fund shares in a customer's account;  transmits proxy statements,
annual reports,  updated prospectuses and other communications from the Trust to
its  customers;  and  receives,  tabulates  and  transmits to the Trust  proxies
executed by its customers with respect to meetings of  shareholders of the Fund.
For these  services,  the  Financial  Intermediary  receives  such fees from the
Shareholder  Servicing Agent as may be agreed upon from time to time between the
Shareholder Servicing Agent and such Financial Intermediary.

                              Eligible Institutions

   The Trust enters into eligible institution agreements with banks, brokers and
other  financial  institutions  pursuant to which that financial  institution as
agent for the Trust with respect to shareholders of and prospective investors in
the Fund who are  customers of that  financial  institution  among other things:
provides  necessary  personnel and facilities to establish and maintain  certain
shareholder  accounts and records  enabling it to hold, as agent, its customers'
shares in its name or its nominee name on the shareholder  records of the Trust;
assists in processing  purchase and  redemption  transactions;  arranges for the
wiring of funds; transmits and receives funds in connection with customer orders
to purchase or redeem shares of the Fund; provides periodic statements showing a
customer's  account  balance  and, to the extent  practicable,  integrates  such
information with information  concerning other customer  transactions  otherwise
effected with or


                                       10
<PAGE>

through it;  furnishes,  either  separately or on an integrated basis with other
reports sent to a customer,  monthly and annual  statements and confirmations of
all purchases and redemptions of Fund shares in a customer's account;  transmits
proxy statements,  annual reports, updated prospectuses and other communications
from the Trust to its  customers;  and receives,  tabulates and transmits to the
Trust proxies executed by its customers with respect to meetings of shareholders
of the Fund. For these services,  each financial  institution  receives from the
Fund an annual fee,  computed daily and payable monthly,  equal to 0.225% of the
average  daily net assets of the Fund  represented  by shares  owned  during the
period for which  payment  was being made by  customers  for whom the  financial
institution was the holder or agent of record.

                                   Distributor

      59 Wall Street Distributors acts as exclusive Distributor of shares of the
Fund. Its office is located at 21 Milk Street,  Boston,  Massachusetts 02109. 59
Wall  Street  Distributors  is a  wholly-owned  subsidiary  of SFG.  SFG and its
affiliates currently provide  administration and distribution services for other
registered  investment companies.  The Trust pays for the preparation,  printing
and  filing of copies  of the  Trust's  registration  statement  and the  Fund's
prospectus  as  required  under  federal  and  state   securities   laws.   (See
"Distributor"  in the  Statement  of  Additional  Information.)

      59 Wall Street  Distributors  holds itself  available to receive  purchase
orders for Fund shares.

                             Custodian, Transfer and
                            Dividend Disbursing Agent

      State Street Bank and Trust Company ("State  Street" or the  "Custodian"),
225 Franklin Street,  P.O. Box 351, Boston,  Massachusetts  02110, is the Fund's
Custodian,   Transfer  and  Dividend  Disbursing  Agent.  As  Custodian,  it  is
responsible  for  maintaining   books  and  records  of  the  Fund's   portfolio
transactions and holding the Fund's portfolio  securities and cash pursuant to a
custodian  agreement with the Trust. Cash is held for the Fund in demand deposit
accounts at the Custodian. Subject to the supervision of the Administrator,  the
Custodian maintains the Fund's accounting and portfolio  transaction records and
for each day  computes  the Fund's net asset value,  net  investment  income and
dividend  payable.  As Transfer and Dividend  Disbursing Agent it is responsible
for maintaining the books and records detailing ownership of the Fund's shares.

                              Independent Auditors

      Deloitte & Touche LLP are the independent auditors for the Fund.

NET ASSET VALUE
================================================================================

      The  Fund's  net asset  value per share is  determined  once daily at 4:00
P.M.,  New York time on each day the New York Stock Exchange is open for regular
trading and New York banks are open for business.

      The  determination  of the  Fund's  net  asset  value per share is made by
subtracting  from the  value of the total  assets of the Fund the  amount of its
liabilities  and  dividing  the  difference  by the number of shares of the Fund
outstanding at the time the  determination  is made. It is anticipated  that the
net  asset  value  per  share of the Fund will  remain  constant  at  $1.00.  No
assurance can be given that this goal can be achieved.

      The  Portfolio's  assets are valued by using the amortized  cost method of
valuation.  This method  involves  valuing a security at its cost at the time of
purchase  and  thereafter  assuming a constant  amortization  to maturity of any
discount or premium,  regardless of the impact of fluctuating  interest rates on
the market value of the  instrument.  The market  value of the Fund's  portfolio
securities  fluctuates  on the basis of the  creditworthiness  of the issuers of
such  securities  and on the  levels  of  interest  rates  generally.  While the
amortized cost method provides certainty in valuation,  it may result in periods
when the value so  determined  is higher or lower  than the price the Fund would
receive if the security  were sold.  (See "Net Asset Value" in the  Statement of
Additional Information.)


                                       11
<PAGE>

DIVIDENDS AND DISTRIBUTIONS
================================================================================

      All the Fund's net income and short-term capital gains and losses, if any,
are declared as a dividend daily and paid monthly.

      Net income of the Fund  consists of (i)  accrued  interest,  accretion  of
discount and amortization of premium,  (ii) plus net short-term capital gains or
losses realized on sales of portfolio securities of the Fund, and (iii) less the
accrued expenses of the Fund applicable to that dividend period. (See "Net Asset
Value".)

      Determination  of the Fund's net income is made  immediately  prior to the
determination  of the net asset  value per share at 4:00 P.M.,  New York time on
each day the New York Stock  Exchange is open for  regular  trading and New York
banks are open for  business.  Net income for days other than such business days
is  determined  as of 4:00  P.M.,  New York  time on the  immediately  preceding
business day.  Dividends  declared are payable to  shareholders of record on the
date of determination.  Shares purchased through submission of a purchase order,
prior to 12:00 P.M., New York time on such business day begin earning  dividends
on that  business  day.  Shares  redeemed  do not  qualify for a dividend on the
business day that the redemption is executed. (See "Redemption of Shares".)

      Unless a shareholder  whose shares are held directly in the  shareholder's
name on the books of the Trust elects to have dividends paid in cash,  dividends
are automatically  reinvested in additional Fund shares without reference to the
minimum  subsequent  purchase  requirement.  Such shareholder who elects to have
dividends paid in cash receives a check in the amount of such dividends.  In the
event a  shareholder  redeems all shares held at any time during the month,  all
accrued but unpaid  dividends are included in the proceeds of the redemption and
future  purchases of shares by such  shareholder  will be subject to the minimum
initial  purchase  requirements.  The Trust  reserves the right to  discontinue,
alter or limit  the  automatic  reinvestment  privilege  at any  time,  but will
provide shareholders prior written notice of any such discontinuance, alteration
or limitation.

      Each Eligible  Institution and each Financial  Intermediary  may establish
its own policy with respect to the  reinvestment of dividends in additional Fund
shares.

TAXES
================================================================================

      Each year,  the Trust  intends to  continue  to qualify the Fund and elect
that the Fund be treated as a separate "regulated  investment company" under the
Internal Revenue Code of 1986, as amended.  Accordingly, the Fund is not subject
to federal  income taxes on its net income and  realized net capital  gains that
are distributed to its shareholders.  A 4% non-deductible  excise tax is imposed
on the Fund to the extent that certain  distribution  requirements  for the Fund
for each  calendar  year are not met. The Trust intends to continue to meet such
requirements.

      Dividends of net income (as defined under  "Dividends and  Distributions")
and net short-term  capital gains,  if any, are taxable to  shareholders  of the
Fund as ordinary  income,  whether such dividends are paid in cash or reinvested
in   additional   shares.   These   distributions   are  not  eligible  for  the
dividends-received deduction allowed to corporate shareholders.

      Under U.S. Treasury  regulations,  the Trust and each Eligible Institution
are  required  to  withhold  and remit to the U.S.  Treasury a portion  (31%) of
dividends and capital gains  distributions on the accounts of those shareholders
who fail to provide a correct  taxpayer  identification  number (Social Security
Number for  individuals)  or to make required  certifications,  or who have been
notified  by the  Internal  Revenue  Service  that  they  are  subject  to  such
withholdings.  Prospective investors should submit an IRS Form W-9 to avoid such
withholding.

                              State and Local Taxes

      Assets  of the  Fund  are  invested  in  direct  obligations  of the  U.S.
Government,  the interest  from which is


                                       12
<PAGE>

specifically  exempted  from state and local income taxes when held  directly by
taxpayers.  All states by  legislation  or  regulation  allow the  character  of
interest  income from direct  obligations of the U.S.  Government  received by a
regulated  investment company organized as a series of a Massachusetts  business
trust, such as the Fund, to pass through to shareholders. However, a shareholder
of the Fund is subject to state and local income taxes in most  jurisdictions on
the portion of  dividends  received  from the Fund which is derived  from income
from  repurchase  agreements.  It is the intention of the Investment  Adviser to
minimize  the  portion of the Fund's  income  which is derived  from  repurchase
agreements to the extent  practicable.  The Trust intends to advise shareholders
of the  proportion  of the Fund's  dividends  which is derived from  interest on
direct obligations of the U.S. Government.

      Dividends  paid from the Fund which are  derived  from  interest on direct
obligations  of the U.S.  Government  are  generally  expected to be exempt from
income taxation in the District of Columbia and the following states:

      Alabama          Maine               Ohio
      Arizona          Maryland            Oklahoma
      Arkansas         Massachusetts       Oregon
      Colorado         Michigan            Pennsylvania
      Delaware         Minnesota           Rhode Island
      Georgia          Missouri            South Carolina
      Hawaii           Mississippi         Tennessee
      Idaho            Montana             Utah
      Illinois         Nebraska            Vermont
      Indiana          New Hampshire       Virginia
      Iowa             New Jersey          West Virginia
      Kansas           New Mexico          Wisconsin.
      Kentucky         North Carolina
      Louisiana        North Dakota

      Such  dividends  are  also  generally  expected  to be so  exempt  in  the
following states provided that a certain minimum percentage of the Fund's assets
consist  of  direct  obligations  of the  U.S.  Government.  It is  the  Trust's
intention  to meet  these  minimum  percentage  requirements,  none of  which is
greater than 50%.

      California       Connecticut         New York.

      There is currently no state income tax in the following states:

      Alaska           South Dakota        Washington
      Florida          Texas               Wyoming.
      Nevada

      Shareholders  are  urged to  consult  their  tax  advisors  regarding  the
possible  exclusion  for state and local  income tax  purposes of the portion of
dividends  paid  from  the  Fund  which  is  derived  from  interest  on  direct
obligations of the U.S. Government.

                                Foreign Investors

      The Fund is designed for investors  who are either  citizens of the United
States or aliens subject to United States income tax. Prospective  investors who
are not citizens of the United  States and who are not aliens  subject to United
States  income tax are subject to United  States  withholding  tax on the entire
amount of all dividends. Therefore, such investors should not invest in the Fund
since alternative  investments in money market  instruments would not be subject
to United States withholding tax.

                                Other Information

      Annual  notification as to the tax status of capital gains  distributions,
if any, is provided to shareholders shortly after June 30, the end of the Fund's
fiscal year. Additional tax information is mailed to shareholders in January.

      This tax discussion is based on the tax laws and  regulations in effect on
the date of this  Prospectus,  however such laws and  regulations are subject to
change.  Shareholders  and prospective  investors are urged to consult their tax
advisors   regarding   specific   questions   relevant   to   their   particular
circumstances.


                                       13
<PAGE>

DESCRIPTION OF SHARES
================================================================================

      The Trust is an open-end  management  investment company organized on June
7, 1983, as an unincorporated  business trust under the laws of the Commonwealth
of  Massachusetts.   Its  offices  are  located  at  21  Milk  Street,   Boston,
Massachusetts 02109; its telephone number is (617) 423-0800.

      Pursuant to the Trust's Declaration of Trust, the Trustees have authorized
the issuance of an unlimited number of full and fractional shares of each series
of the Trust,  one of which is the Fund.  The Trustees may divide or combine the
shares into a greater or lesser number of shares  without  thereby  changing the
proportionate beneficial interest in the Trust and may authorize the creation of
additional  series  of  shares,  the  proceeds  of which  would be  invested  in
separate,  independently  managed portfolios.  Currently there are two series in
addition to the Fund.

      The Trustees  themselves  have the power to alter the number and the terms
of office of the Trustees,  to lengthen their own terms,  or to make their terms
of unlimited  duration  subject to certain  removal  procedures,  and to appoint
their own  successors;  provided  that at least  two-thirds of the Trustees have
been elected by the shareholders.

      Each share of the Fund  represents an equal  proportional  interest in the
Fund with each other  share.  Upon  liquidation  of the Fund,  shareholders  are
entitled  to  share  pro  rata in the  net  assets  of the  Fund  available  for
distribution to shareholders.

      Shareholders  of the Fund are  entitled to a full vote for each full share
held and to a  fractional  vote for  fractional  shares.  The  voting  rights of
shareholders are not cumulative. Shares have no preemptive or conversion rights.
The rights of redemption are described elsewhere herein.  Shares when issued are
fully paid and nonassessable,  except as set forth below. It is the intention of
the Trust not to hold meetings of shareholders  annually.  The Trustees may call
meetings of  shareholders  for action by shareholder  vote as may be required by
the 1940 Act or as may be  permitted  by the  Declaration  of Trust or  By-Laws.
Shareholders  have under  certain  circumstances  (e.g.,  upon  application  and
submission of certain specified  documents to the Trustees by a specified number
of shareholders) the right to communicate with other  shareholders in connection
with  requesting  a meeting of  shareholders  for the purpose of removing one or
more Trustees.  Shareholders  also have the right to remove one or more Trustees
without  a  meeting  by a  declaration  in  writing  by a  specified  number  of
shareholders.

      The By-Laws of the Trust  provide  that the presence in person or by proxy
of the holders of record of one half of the shares of the Fund  outstanding  and
entitled  to vote  thereat  shall  constitute  a quorum at all  meetings of Fund
shareholders,  except as  otherwise  required  by  applicable  law.  The By-Laws
further  provide that all questions  shall be decided by a majority of the votes
cast at any such  meeting  at which a quorum is  present,  except  as  otherwise
required by applicable law.

      The  Declaration of Trust provides that, at any meeting of shareholders of
the  Fund,  each  Eligible  Institution  may vote any  shares  as to which  that
Eligible  Institution  is the  agent of  record  and  which  are  otherwise  not
represented in person or by proxy at the meeting,  proportionately in accordance
with the votes  cast by  holders  of all  shares  otherwise  represented  at the
meeting in person or by proxy as to which that Eligible Institution is the agent
of record. Any shares so voted by an Eligible Institution are deemed represented
at the meeting for purposes of quorum requirements.

      The  Trust is an  entity of the type  commonly  known as a  "Massachusetts
business trust". Under Massachusetts law,  shareholders of such a business trust
may, under certain circumstances,  be held personally liable as partners for its
obligations. However, the risk of a shareholder incurring financial loss because
of shareholder  liability is limited to  circumstances  in which both inadequate
insurance existed and the Trust itself was unable to meet its obligations.


                                       14
<PAGE>

ADDITIONAL INFORMATION
================================================================================

      As used in this Prospectus,  the term "majority of the Fund's  outstanding
voting  securities" (as defined in the 1940 Act) currently means the vote of (i)
67% or more of the Fund's  shares  present at a meeting,  if the holders of more
than 50% of the outstanding  voting securities of the Fund are present in person
or represented by proxy; or (ii) more than 50% of the Fund's  outstanding voting
securities, whichever is less.

      Fund  shareholders   receive  semi-annual  reports  containing   unaudited
financial  statements and annual reports containing financial statements audited
by independent auditors.

      The Fund's "yield" and "effective  yield" may be used from time to time in
shareholder  reports or other  communications  to  shareholders  or  prospective
investors.  Both yield  figures  are based on  historical  earnings  and are not
intended to indicate future performance. Performance information may include the
Fund's  investment  results  and/or  comparisons  of its  investment  results to
various  unmanaged  indexes (such as the 1-month LIBOR) and to  investments  for
which reliable performance data is available.  Performance  information may also
include  comparisons  to  averages,  performance  rankings or other  information
prepared by  recognized  mutual fund  statistical  services.  To the extent that
unmanaged indexes are so included, the same indexes will be used on a consistent
basis.  The  Fund's  investment  results  as  used in  such  communications  are
calculated in the manner set forth below.

      The "yield" of the Fund refers to the income generated by an investment in
the Fund over a seven-day  period (which period will be stated).  This income is
then  "annualized".  That is, the amount of 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.  The "effective yield" is calculated
similarly but, when  annualized,  the income earned by an investment in the Fund
is assumed to be reinvested.  The "effective  yield" is slightly higher than the
"yield" because of the compounding effect of this assumed reinvestment.

      This  Prospectus  omits  certain  of  the  information  contained  in  the
Statement of Additional  Information and the  Registration  Statement filed with
the Securities and Exchange Commission.  The Statement of Additional Information
may be  obtained  from  59  Wall  Street  Distributors  without  charge  and the
Registration  Statement  may  be  obtained  from  the  Securities  and  Exchange
Commission  upon payment of the fee  prescribed by the Rules and  Regulations of
the Commission.


                                       15
<PAGE>

The 59 Wall Street Trust

Investment Adviser and
  Administrator
Brown Brothers Harriman & Co.
59 Wall Street
New York, New York  10005

Distributor
59 Wall Street Distributors, Inc.
21 Milk Street
Boston, Massachusetts  02109

Shareholder Servicing Agent
Brown Brothers Harriman & Co.
59 Wall Street
New York, New York  10005
(800) 625-5759

      No  dealer,  salesman  or  any  other person has been
authorized   to  give  any   information  or  to  make  any
representations,   other  than  those   contained  in  this
Prospectus  and  the  Statement of Additional  Information,
in  connection with the offer contained in this Prospectus,
and   if   given   or   made,  such  other  information  or
representations  must  not  be  relied  upon as having been
authorized   by  the  Trust  or   the   Distributor.   This
Prospectus  does  not  constitute  an offer by the Trust or
by the Distributor to sell or the solicitation of any offer
to buy any of the securities offered hereby in any
jurisdiction to any person to whom it is unlawful  for  the
Trust  or  the  Distributor  to  make such  offer  in  such
jurisdiction.



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