MENTOR INSTITUTIONAL TRUST
485APOS, 1996-05-28
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    As filed with the Securities and Exchange Commission on May 28, 1996
    
                                                      Registration No. 33-80784
                                                              File No. 811-8484
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                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549

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


                                    FORM N-1A

         REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933     [ X ]

                        Pre-Effective Amendment No. ____             [   ]
   
                         Post-Effective Amendment No. 6              [ X ]
    
     REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940 [ X ]
   
                                Amendment No. 9                      [ X ]
    
                        (Check appropriate box or boxes)
                           ---------------------------


                           MENTOR INSTITUTIONAL TRUST
               (Exact name of registrant as specified in charter)

                                  P.O. Box 1357
                            Richmond, Virginia 23286
                    (Address of principal executive offices)

       Registrant's Telephone Number, Including Area Code: (804) 782-3647


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



                                Paul F. Costello
                                    President
                           Mentor Institutional Trust
                              901 East Byrd Street
                            Richmond, Virginia 23219
                     (Name and address of agent for service)

                                     Copy to

                            Timothy W. Diggins, Esq.
                                  Ropes & Gray
                             One International Place
                                Boston, MA 02110

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

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

[   ]       immediately upon filing pursuant to paragraph (b)


[   ]       on (date) pursuant to paragraph (b)


[ X ]       60 days after filing pursuant to paragraph (a)(1)

[   ]       on  (date) pursuant to paragraph (a)(1)
    

[   ]       75 days after filing pursuant to paragraph (a)(2)

[   ]       on (date) pursuant to paragraph (a)(2) of Rule 485

If appropriate, check the following box:

[   ]       this post-effective amendment designates a new effective date for
            a previously filed post-effective amendment

The Registrant has registered an indefinite number or amount of securities under
the  Securities  Act of 1933 pursuant to Rule 24f-2. A Rule 24f-2 notice for the
fiscal  year ended  October  31,  1995 has been filed  with the  Securities  and
Exchange Commission on December 28, 1995.

   
The Cross Reference Sheet in respect of Mentor Institutional Trust and its
Portfolios, the prospectus of Mentor Institutional Trust, and the prospectus of
the SNAP Portfolio contained in Amendment No. 5 to the Registrant's Registration
Statement on Form N-1A (File No. 80784) filed on March 11, 1996 are incorporated
herein by reference.

                           MENTOR INSTITUTIONAL TRUST

                         Supplement Dated May 23, 1996
                                       to
                        Prospectus Dated March 11, 1996

     The information set out under "Annual Portfolio Operating Expenses" on page
2 of the Prospectus regarding Mentor Perpetual International Portfolio (referred
to as the "Mentor International Portfolio" in the Prospectus) is replaced in its
entirety with the following:

       Management Fees                          1.00%
       12-b1 Fees                               0.00%
       Other Expenses*                          0.10%
                                                -----
         Total Portfolio Operating Expenses*    1.10%

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

         *Other Expenses and Total Portfolio Operating Expenses reflect a
voluntary expense limitation. In the absence of this expense limitation, Other
Expenses are expected to be 0.35%  for the International Portfolio and Total
Portfolio Operating Expenses are expected to be 1.35% for that Portfolio.

         EXAMPLE

         An investment of $1,000 in the International Portfolio would incur the
following expenses, assuming 5% annual return and redemption at the end of each
period:

                  1 year              $12
                  3 year              $35

    

   
The following paragraph is added to page 14 of the Prospectus at the end of the
section "Purchase of shares":
    

   
         Mentor Distributors, Commonwealth, Mentor Perpetual, or affiliates
thereof, at their own expense and out of their own assets, may provide
compensation to dealers in connection with sales of shares of a Portfolio. Such
compensation may include, but is not limited to, financial assistance to dealers
in connection with conferences, sales or training programs for their employees,
seminars for the public, advertising or sales campaigns, or other
dealer-sponsored special events. In some instances, this compensation may be
made available only to certain dealers whose representatives have sold or are
expected to sell significant amounts of shares. Dealers may not use sales of a
Portfolio's shares to qualify for this compensation to the extent such may be
prohibited by the laws of any state or any self-regulatory agency, such as the
National Association of Securities Dealers, Inc.
    

   
PROSPECTUS                                                        May 23, 1996
    

   
                    MENTOR PERPETUAL INTERNATIONAL PORTFOLIO
    
   
         MENTOR PERPETUAL INTERNATIONAL  PORTFOLIO seeks long-term capital
appreciation by investing in a diversified portfolio of equity securities of
issuers outside the United States. Mentor Perpetual Advisors,  L.L.C. is the
Portfolio's  investment adviser.  Shares of the Portfolio are being offered
principally to institutions and high net-worth individual investors.  This
Portfolio may use leverage-that is, it may borrow  money to  purchase
additional  portfolio  securities,  which involves special risks.
    
         This  Prospectus  sets  forth  concisely  the  information   about  the
Portfolio that a prospective investor should know before investing.  Please read
this  Prospectus  and retain it for future  reference.  INVESTORS  CAN FIND MORE
DETAILED INFORMATION IN THE MARCH 11, 1996 STATEMENT OF ADDITIONAL  INFORMATION,
AS AMENDED  FROM TIME TO TIME.  FOR A FREE COPY OF THE  STATEMENT,  CALL  MENTOR
DISTRIBUTORS,  INC. AT  1-800-869-6042.  The  Statement  has been filed with the
Securities and Exchange  Commission and is incorporated  into this Prospectus by
reference.  The  Portfolio's  address  is  P.O.  Box  1357,  Richmond,  Virginia
23286-0109.


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

                            MENTOR DISTRIBUTORS, INC.
                                   DISTRIBUTOR


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




                                       -1-

<PAGE>



EXPENSE SUMMARY

                  Expenses are one of several factors to consider when investing
in  the  Portfolio.   The  following  table  summarizes  an  investor's  maximum
transaction  costs from  investing in the  Portfolio  and expenses the Portfolio
expects to incur in its first full fiscal year. The Example shows the cumulative
expenses  attributable to a hypothetical $1,000 investment in the Portfolio over
specified periods.

    SHAREHOLDER TRANSACTION EXPENSES:
    Maximum Sales Load Imposed on Purchases                                 None
    Maximum Sales Load Imposed on Reinvested Dividends                      None
    Deferred Sales Load                                                     None
    Redemption Fees                                                         None
    Exchange Fee                                                            None
   
               ANNUAL PORTFOLIO OPERATING EXPENSES:
               (as a percentage of average net assets)
                  Management Fees                                    1.00%
                  12b-1 Fees                                         0.00%
                  Other Expenses*                                    0.10%
                                                                     ----
                    Total Portfolio Operating Expenses*              1.10%
- -----------
*Other Expenses and Total Portfolio Operating Expenses reflect a voluntary
 expense limitation currently in effect. In the absence of this expense
 limitation, Other Expenses are expected to be 0.35% and Total Portfolio
 Operating Expenses are expected to be 1.35%.

    
EXAMPLE

               An  investment  of  $1,000  in  the  Portfolio  would  incur  the
following expenses,  assuming 5% annual return and redemption at the end of each
period:

   
               1 year                                                   $12

               3 years                                                  $35
    
               This  information  is provided to help  investors  understand the
expenses of investing in the Portfolio and an investor's  share of the estimated
operating  expenses of the  Portfolio.  The Example  should not be  considered a
representation of future  performance;  actual expenses may be more or less than
those shown.



                                       -2-


<PAGE>



INVESTMENT OBJECTIVE AND POLICIES
   
               MENTOR PERPETUAL INTERNATIONAL PORTFOLIO'S INVESTMENT OBJECTIVE
IS LONG-TERM  CAPITAL  APPRECIATION.  The  Portfolio is designed for
institutional investors who believe that  investment in a diversified  portfolio
of securities of issuers located  outside the U.S. offers the potential for
long-term  capital appreciation.
    
               The Portfolio invests in a diversified portfolio of securities of
issuers located  outside the United States.  The  Portfolio's  investments  will
normally include common stocks,  preferred stocks,  securities  convertible into
common  stocks or preferred  stocks,  and warrants to purchase  common stocks or
preferred  stocks.  The  Portfolio  may also  invest to a lesser  extent in debt
securities  and other types of  investments  if Mentor  Perpetual  believes they
would help achieve the Portfolio's  objective.  The Portfolio may hold a portion
of its assets in cash or money market instruments.

               The Portfolio  will not limit its  investments  to any particular
type of company.  The Portfolio may invest in companies,  large or small,  whose
earnings are believed to be in a relatively strong growth trend, or in companies
in which  significant  further growth is not  anticipated but whose market value
per share is thought to be undervalued.

               It is  likely  that,  at  times,  a  substantial  portion  of the
Portfolio's  assets  will be  invested  in  securities  of issuers  in  emerging
markets,  including  under-developed  and  developing  nations.   Investment  in
emerging markets are subject to the same risks applicable to foreign investments
generally,  although  those risks may be  increased  due to  conditions  in such
markets.  For  example,  the  securities  markets and legal  systems in emerging
markets may only be in a  developmental  stage and may provide few, or none,  of
the  advantages or  protections  of markets or legal  systems  available in more
developed countries.  Although many of the securities in which the Portfolio may
invest are traded on securities exchanges, they may trade in limited volume, and
the exchanges may not provide all of the conveniences or protections provided by
securities  exchanges in more developed markets. The Portfolio may also invest a
substantial  portion of its assets in securities traded in the  over-the-counter
markets  and  not on  any  exchange,  which  may  affect  the  liquidity  of the
investment and expose the Portfolio to the credit risk of its  counterparties in
trading  those   investments.   See  "Other  investment   practices--Foreign
securities."

               Fixed-income securities in which the Portfolio may invest will be
of investment  grade. A security will be deemed to be of "investment  grade" if,
at the time of investment by the Portfolio,  the security is rated at least Baa3
by  Moody's  Investors  Service,  Inc.  or BBB- by  Standard  & Poor's,  or at a
comparable  rating  by  another  nationally   recognized  rating   organization.
Securities rated Baa or BBB lack outstanding investment characteristics and have
speculative  characteristics  and are subject to greater credit and market risks
than higherrated securities.  The Portfolio will not be required to dispose of a
security  held by it if the  security's  rating  falls below  investment  grade,
although  Mentor  Perpetual will consider  whether  continued  investment in the
security is  consistent  with the  Portfolio's  investment  objectives.  See the
Statement of Additional  Information  for  descriptions  of  securities  ratings
assigned by Moody's and Standard & Poor's.

               Mentor  Perpetual  may  under  unusual  circumstances   implement
temporary "defensive" strategies in order to reduce fluctuations in the value of
the Portfolio's  assets. At those times, the Portfolio may invest any portion of
its  assets in cash or cash  equivalents,  money  market  instruments,  or other
short-term,  high-quality investments Mentor Perpetual considers consistent with
such defensive strategies.


                                       -3-

<PAGE>



OTHER INVESTMENT PRACTICES AND RISKS

               The  Portfolio  may  engage  in the  other  investment  practices
described below. See the Statement of Additional Information for a more detailed
description of these practices and certain risks they may involve.

               INVESTMENTS  IN  SMALLER   COMPANIES.   The  Fund  may  invest  a
substantial portion of its assets in securities issued by small companies.  Such
companies may offer greater  opportunities for capital  appreciation than larger
companies,  but investments in such companies may involve certain special risks.
Such companies may have limited product lines,  markets,  or financial resources
and may be  dependent  on a  limited  management  group.  While the  markets  in
securities of such companies have grown rapidly in recent years, such securities
may  trade  less  frequently  and  in  smaller  volume  than  more  widely  held
securities. The values of these securities may fluctuate more sharply than those
of other  securities,  and the  Portfolio  may  experience  some  difficulty  in
establishing or closing out positions in these  securities at prevailing  market
prices.  There may be less publicly- available  information about the issuers of
these  securities or less market interest in such securities than in the case of
larger companies, and it may take a longer period of time for the prices of such
securities  to reflect  the full  value of their  issuers'  underlying  earnings
potential or assets.

               Some securities of smaller issuers may be restricted as to resale
or may otherwise be highly illiquid.  The ability of the Portfolio to dispose of
such securities may be greatly  limited,  and the Portfolio may have to continue
to hold such  securities  during periods when Mentor  Perpetual  would otherwise
have sold the security.  It is possible that Mentor  Perpetual or its affiliates
or clients may hold securities issued by the same issuers, and may in some cases
have acquired the securities at different  times, on more favorable terms, or at
more favorable prices, than the Portfolio.

               FOREIGN  SECURITIES.  Investments  in foreign  securities  entail
certain  risks.  The Portfolio may invest in  securities  principally  traded in
foreign markets. Since foreign securities are normally denominated and traded in
foreign  currencies,  the  values  of the  Portfolio's  assets  may be  affected
favorably  or  unfavorably  by  currency  exchange  rates and  exchange  control
regulations.  There may be less information  publicly  available about a foreign
company  than about a U.S.  company,  and foreign  companies  are not  generally
subject to accounting, auditing, and financial reporting standards and practices
comparable  to  those in the  United  States.  The  securities  of some  foreign
companies  are less  liquid  and at  times  more  volatile  than  securities  of
comparable U.S. companies. Foreign brokerage commissions and other fees are also
generally higher than in the United States.  Foreign  settlement  procedures and
trade  regulations  may  involve  certain  risks  (such as delay in  payment  or
delivery of securities or in the recovery of the Portfolio's assets held abroad)
and expenses not present in the settlement of domestic investments.

               In addition,  there may be a possibility  of  nationalization  or
expropriation of assets, imposition of currency exchange controls,  confiscatory
taxation,  political or financial instability, and diplomatic developments which
could  affect  the  value of the  Portfolio's  investments  in  certain  foreign
countries.  Legal remedies  available to investors in certain foreign  countries
may be more limited than those  available  with  respect to  investments  in the
United States or in other foreign countries. In the case of securities issued by
a foreign governmental entity, the issuer may in certain circumstances be unable
or unwilling to meet its  obligations on the securities in accordance with their
terms, and the Portfolio may have limited recourse  available to it in the event
of default. The laws of some foreign countries may limit the Portfolio's ability
to invest in securities of certain issuers  located in those foreign  countries.
Special tax considerations apply to foreign securities. The Portfolio may buy or
sell foreign  currencies and options and futures contracts on foreign currencies
for hedging purposes in connection with its foreign investments.

               BORROWING AND LEVERAGE.  The Portfolio may borrow money to invest
in  additional  portfolio  securities.   This  practice,  known  as  "leverage",
increases the  Portfolio's  market exposure and its risk. When the Portfolio has
borrowed money for leverage and its  investments  increase or decrease in value,
the Portfolio's net asset value will normally  increase or decrease more than if
it had not borrowed money. The interest the Portfolio must pay on borrowed money
will reduce the amount of any potential gains or increase any losses. The extent
to which the Portfolio will borrow money,  and the amount it may borrow,  depend
on market  conditions and interest rates.  Successful use of leverage depends on
Mentor Perpetual's ability to predict market movements correctly.

               OPTIONS AND FUTURES.  The Portfolio may buy and sell call and put
options  to hedge  against  changes  in net asset  value or to realize a greater
current return. In addition,  through the purchase and sale of futures contracts
and

                                       -4-

<PAGE>



related options,  the Portfolio may at times seek to hedge against  fluctuations
in net asset  value and,  to the  extent  consistent  with  applicable  law,  to
increase its investment return.

               The  Portfolio's   ability  to  engage  in  options  and  futures
strategies   will  depend  on  the   availability  of  liquid  markets  in  such
instruments. It is impossible to predict the amount of trading interest that may
exist in various types of options or futures contracts.  Therefore,  there is no
assurance  that  the  Portfolio  will  be  able  to  utilize  these  instruments
effectively for the purposes  stated above.  Transactions in options and futures
involve  certain  risks  which  are  described  below  and in the  Statement  of
Additional Information.

               Transactions in options and futures  contracts  involve brokerage
costs and may require the Portfolio to segregate assets to cover its outstanding
positions. For more information, see the Statement of Additional Information.

               Index  futures and options.  The Portfolio may buy and sell index
futures  contracts ("index futures") and options on index futures and on indices
for hedging purposes (or may purchase warrants whose value is based on the value
from time to time of one or more foreign securities indices). An "index futures"
is a contract  to buy or sell units of a  particular  bond or stock  index at an
agreed price on a specified future date. Depending on the change in value of the
index  between the time when the Portfolio  enters into and  terminates an index
futures  or option  transaction,  the  Portfolio  realizes  a gain or loss.  The
Portfolio may also, to the extent  consistent  with applicable law, buy and sell
index futures and options to increase its investment return.

               Risks  related to options  and  futures  strategies.  Options and
futures transactions involve costs and may result in losses. Certain risks arise
because of the possibility of imperfect  correlations  between  movements in the
prices of futures  and  options and  movements  in the prices of the  underlying
security  or  index  or of the  securities  held by the  Portfolio  that are the
subject  of a hedge.  The  successful  use by the  Portfolio  of the  strategies
described above further  depends on the ability of Mentor  Perpetual to forecast
market  movements  correctly.  Other risks arise from the Portfolio's  potential
inability to close out futures or options positions. Although the Portfolio will
enter into options or futures  transactions  only if Mentor  Perpetual  believes
that a liquid  secondary  market  exists for such  options or futures  contract,
there can be no  assurance  that the  Portfolio  will be able to effect  closing
transactions  at  any  particular  time  or  at  an  acceptable  price.  Certain
provisions  of the Internal  Revenue Code may limit the  Portfolio's  ability to
engage in options and futures transactions.

               The  Portfolio  generally  expects that its options  transactions
will  be  conducted  on  recognized  exchanges.  The  Portfolio  may in  certain
instances  purchase  and sell  options  in the  over-the-counter  markets  . The
Portfolio's ability to terminate options in the over-the-counter  markets may be
more limited than for exchange-traded options and may also involve the risk that
securities  dealers  participating in such transactions  would be unable to meet
their  obligations  to the Portfolio.  The Portfolio  will,  however,  engage in
over-the-counter transactions only when appropriate exchange-traded transactions
are  unavailable  and when,  in the  opinion of Mentor  Perpetual,  the  pricing
mechanism and liquidity of the over-the-counter markets are satisfactory and the
participants are responsible parties likely to meet their obligations.

               The Portfolio will not purchase  futures or options on futures or
sell  futures  if as a result  the sum of the  initial  margin  deposits  on the
Portfolio's existing futures positions and premiums paid for outstanding options
on futures  contracts  would exceed 5% of the Portfolio's  assets.  (For options
that are "in-the-money" at the time of purchase,  the amount by which the option
is "in-the-money" is excluded from this calculation.)

               REPURCHASE  AGREEMENTS  AND SECURITIES  LOANS.  The Portfolio may
enter into  repurchase  agreements  and  securities  loans.  Under a  repurchase
agreement,  the Portfolio  purchases a debt  instrument  for a relatively  short
period  (usually not more than one week),  which the seller agrees to repurchase
at a fixed time and price,  representing  the  Portfolio's  cost plus  interest.
Under a securities loan, the Portfolio lends portfolio securities. The Portfolio
will enter into repurchase  agreements and securities loans only with commercial
banks  and  with  registered  broker-dealers  who  are  members  of  a  national
securities exchange or market makers in government  securities,  and in the case
of repurchase agreements,  only if the debt instrument subject to the repurchase
agreement  is a U.S.  Government  security.  These  transactions  must be  fully
collateralized at all times, but involve some risk to the Portfolio if the other
party  should  default  on its  obligations  and the  Portfolio  is  delayed  or
prevented from recovering the collateral. If the other party

                                       -5-

<PAGE>



should become involved in bankruptcy or insolvency  proceedings,  it is possible
that the  Portfolio  may be treated as an unsecured  creditor and be required to
return the underlying collateral to the other party's estate.

               PORTFOLIO  TURNOVER.  The length of time the Portfolio has held a
particular  security is not generally a consideration  in investment  decisions.
The  investment  policies of the Portfolio  may lead to frequent  changes in the
Portfolio's investments, particularly in periods of volatile market movements. A
change in the securities held by the Portfolio is known as "portfolio turnover."
Portfolio turnover  generally involves some expense to the Portfolio,  including
brokerage commissions or dealer mark-ups and other transaction costs on the sale
of securities and  reinvestment  in other  securities.  Such sales may result in
realization of taxable capital gains. The Portfolio's  annual portfolio turnover
rate is expected to be less than 200% for the current fiscal year.



               As a matter of policy,  the Trustees will not  materially  change
the Portfolio's  investment  objective without shareholder  approval.  (Any such
change could,  of course,  result in a change in the nature of the securities in
which the  Portfolio  may invest and the risks  involved in an investment in the
Portfolio.)

MANAGEMENT OF THE PORTFOLIO
   
               The  Trustees  of  the  Trust  are   responsible   for  generally
overseeing  the  conduct of the  Trust's  business.  MENTOR  PERPETUAL  ADVISORS
L.L.C.,  located at 901 East Byrd  Street,  Richmond,  Virginia  23219,  acts as
investment  adviser to the Portfolio  pursuant to a Management  Contract between
the Trust and Mentor Perpetual.  MENTOR INVESTMENT GROUP, INC. ("Mentor") serves
as administrator to the Portfolio.  Mentor does not receive compensation  from
the Portfolio for the  performance of such  services.  Mentor Perpetual  is  an
investment  advisory  firm  owned  equally  by Perpetual  plc and  Mentor.  The
Perpetual  organization  currently  serves  as investment adviser  for assets of
more than $6 billion.  It clients  include 28 unit investment  trusts and other
public  investment pols for over 150 clients, including  private  individuals,
charities,  pension plans,  and life assurance companies. Mentor Perpetual
currently serves as investment adviser to the Mentor Perpetual  Global
Portfolio,  an open-end  mutual fund which is a series of The Mentor  Funds.
Investment  decisions  for the  Portfolio  are made by a team of investment
professionals  at  Mentor  Perpetual.   Mentor  is  a  wholly  owned subsidiary
of Wheat First Butcher Singer,  Inc. ("Wheat First Butcher  Singer"). Wheat
First  Butcher  Singer,  through  other  subsidiaries,  also  engages  in
securities brokerage, investment banking, and related businesses.
    
               Mentor Perpetual makes investment decisions for the Portfolio and
places the purchase and sale orders for the Portfolio's portfolio  transactions.
In  selecting  broker-dealers,   Mentor  Perpetual  may  consider  research  and
brokerage  services  furnished to it and its affiliates.  Subject to seeking the
best overall terms  available,  Mentor Perpetual may consider sales of shares of
the Portfolio (and, if permitted by law, of other funds in the Mentor family) as
a factor in the selection of broker-dealers  to execute  portfolio  transactions
for the  Portfolio.  Mentor  Perpetual  may at times cause the  Portfolio to pay
commissions to broker-dealers affiliated with Mentor Perpetual.

HOW THE PORTFOLIO VALUES ITS SHARES

               The  Portfolio  calculates  the net asset  value of its shares by
dividing the total value of its assets,  less liabilities,  by the number of its
shares outstanding.  Shares are valued as of the close of regular trading on the
New York Stock Exchange each day the Exchange is open.  Portfolio securities for
which  market  quotations  are  readily  available  are stated at market  value.
Short-term  investments  that  will  mature  in 60 days or less  are  stated  at
amortized  cost,  which has been determined to approximate the fair market value
of such  investments.  All other  securities and assets are valued at their fair
values.


                                       -6-

<PAGE>



               Securities quoted in foreign  currencies are translated into U.S.
dollars at the current exchange rates or at such other rates as the Trustees may
determine in computing net asset value. As a result,  fluctuations in the values
of such  currencies  in  relation  to the U.S.  dollar will affect the net asset
value of  Portfolio  shares  even  though  there has not been any  change in the
values of such securities as quoted in such foreign currencies.

HOW DISTRIBUTIONS ARE MADE

               The  Portfolio  distributes  net  investment  income  and any net
realized capital gains at least annually.  Distributions  from capital gains are
made after  applying  any  available  capital  loss  carryovers.  All  Portfolio
distributions  will be  invested  in  additional  Portfolio  shares,  unless the
shareholder instructs the Portfolio otherwise.

TAXES

               The  Portfolio  intends  to qualify  as a  "regulated  investment
company" for federal income tax purposes and to meet all other requirements that
are  necessary  for it to be  relieved  of federal  taxes on income and gains it
distributes to shareholders.  The Portfolio will distribute substantially all of
its net investment income and capital gain net income on a current basis.

               The following is intended principally for shareholders subject to
federal income taxation:

               All Portfolio  distributions  will be taxable to  shareholders as
ordinary income, except that any distributions of net capital gain will be taxed
as long-term  capital gain,  regardless  of how long a shareholder  has held the
shares  (although  the loss on a sale of shares held for six months or less will
be  treated  as  long-term  capital  loss  to the  extent  of any  capital  gain
distribution  received  with  respect to those  shares).  Distributions  will be
taxable as described  above  whether  received in cash or in shares  through the
reinvestment  of  distributions.  Early  in each  year  the  Trust  will  notify
shareholders of the amount and tax status of distributions paid by the Portfolio
for the  preceding  year.  In buying or selling  securities  for the  Portfolio,
Mentor  Perpetual will not normally take into account the effect any purchase or
sale  of  securities   will  have  on  the  tax  positions  of  the  Portfolio's
shareholders.

               Shareholders of the Portfolio who are U.S.  citizens or residents
may be able to claim a foreign tax credit or deduction on their U.S.  income tax
returns with respect to foreign taxes paid by the  Portfolio.  If, at the end of
the fiscal year of the Portfolio,  more than 50% of the Portfolio's total assets
are represented by securities of foreign corporations,  the Portfolio intends to
make an election  permitted  by the  Internal  Revenue Code to treat any foreign
taxes it paid as paid by its  shareholders.  In that case,  shareholders who are
U.S.  citizens,  U.S.  corporations,  and, in some cases, U.S. residents will be
required to include in U.S.  taxable  income their pro rata share of such taxes,
but may then be  entitled to claim a foreign  tax credit or  deduction  (but not
both) for their share of such taxes.

               The  foregoing  is  a  summary  of  certain  federal  income  tax
consequences of investing in the Portfolio. Dividends and distributions also may
be subject to state and local taxes. Shareholders are urged to consult their tax
advisers  regarding  specific  questions as to federal,  state,  or local taxes.
Non-U.S.  investors  should  consult  their  tax  advisers  concerning  the  tax
consequences of ownership of shares of the Portfolio,  including the possibility
that  distributions may be subject to a 30% United States  withholding tax (or a
reduced rate of withholding provided by treaty).

                                       -7-

<PAGE>




PURCHASE OF SHARES

               Shares  of the  Portfolio  are sold at the net asset  value  next
determined after a purchase order is received by the Portfolio.  Purchase orders
that are received  prior to the close of trading on the New York Stock  Exchange
on a particular  day are priced  according to the net asset value  determined on
that day.

                Mentor Distributors, Inc. ("Mentor Distributors"), 901 East Byrd
Street,  Richmond,  Virginia  23219,  serves as distributor  of the  Portfolio's
shares.  Mentor  Distributors  is not  obligated to sell any specific  amount of
shares of the Portfolio.

               An  investor  may  make an  initial  purchase  of  shares  of the
Portfolio by  submitting  a completed  Trust  application  along with a purchase
order, and by making payment to Mentor Distributors.  Investors will be required
to make  minimum  initial  investments  of  $500,000  in the Trust  and  minimum
subsequent  investments of $25,000.  Investments made through advisory  accounts
maintained with investment advisers registered under the Investment Advisers Act
of 1940 (including "wrap" accounts) are not subject to these minimum  investment
requirements. The Portfolio reserves the right at any time to change the initial
and subsequent investment minimums required of investors.

               Shares of the Portfolio may be purchased by (i) paying cash, (ii)
exchanging securities acceptable to Mentor Perpetual,  or (iii) a combination of
such  securities  and cash.  Purchase of shares of the Portfolio in exchange for
securities is subject in each case to the determination by Mentor Perpetual that
the  securities to be exchanged are  acceptable  for purchase by the  Portfolio.
Securities accepted by Mentor Perpetual in exchange for Portfolio shares will be
valued  in the  same  manner  as the  Portfolio's  assets  as of the time of the
Portfolio's next  determination  of net asset value after such  acceptance.  All
dividends  and  subscription  or other rights which are  reflected in the market
price of accepted securities at the time of valuation become the property of the
Portfolio  and must be delivered to the  Portfolio  upon receipt by the investor
from the  issuer.  A gain or loss  for  federal  income  tax  purposes  would be
realized  upon the  exchange  by an investor  that is subject to federal  income
taxation,  depending upon the investor's  basis in the  securities  tendered.  A
shareholder who wishes to purchase shares by exchanging securities should obtain
instructions by calling Mentor Distributors at 1-800-869-6042.

               In all cases Mentor Perpetual or Mentor Distributors reserves the
right to reject any particular investment.

REDEMPTION OF SHARES

               A shareholder  may redeem all or any portion of its shares in the
Portfolio at any time upon request, by following the procedures set forth below.
Redemptions  will be effected at the net asset value per share of the  Portfolio
next determined after the receipt by the Portfolio of redemption instructions in
"good order" as described below.  Shares may be redeemed by submitting a written
request for redemption to Mentor Distributors,  or to the Trust at the following
address:

                           Mentor Institutional Trust
                                  P.O. Box 1357
                          Richmond, Virginia 23286-0109

               Upon  receipt  of a  request  in "good  order,"  the  Trust  will
determine the amount of the net asset value of the redeemed  shares,  based upon
the net asset  value of the  Portfolio  next  determined  after  the  redemption
request has been  received.  A check for the proceeds will normally be mailed on
the next business day.


                                       -8-


<PAGE>



               If shares of the Portfolio to be redeemed represent an investment
made by check,  the Trust  reserves  the right not to  transmit  the  redemption
proceeds to the shareholder  until the check has been collected,  which may take
up to 15 days after the purchase date.

               A  redemption  request  will be  considered  to have been made in
"good order" if the following conditions are satisfied:

                (1) the request is in writing, states the number of shares to be
                    redeemed, and identifies the shareholder's Portfolio account
                    number;

                (2) the request is signed by each  registered  owner  exactly as
                    the shares are registered; and

                (3) if the  shares to be  redeemed  were  issued in  certificate
                    form,  the  certificates  are  endorsed for transfer (or are
                    accompanied  by an endorsed  stock power) and  accompany the
                    redemption request.

     The  Portfolio  reserves  the  right to  require  signature  guarantees.  A
guarantor of a signature must be an eligible guarantor  institution,  which term
includes most banks and trust companies,  savings  associations,  credit unions,
and securities  brokers or dealers.  The purpose of a signature  guarantee is to
protect Portfolio shareholders against the possibility of fraud.

     Mentor  Distributors  may facilitate any  redemption  request.  There is no
extra charge for this service.

     OTHER INFORMATION CONCERNING REDEMPTION.  Under unusual circumstances,  the
Portfolio may suspend repurchases, or postpone payment for more than seven days,
as permitted by federal securities laws. In addition, the Portfolio reserves the
right, if conditions  exist which make cash payments  undesirable,  to honor any
request  for  redemption  by making  payment  in whole or in part by  securities
valued in the same way as they would be valued for  purposes  of  computing  the
Portfolio's  per share net asset  value.  If  payment is made in  securities,  a
shareholder may incur  brokerage  expenses in converting  those  securities into
cash.

     EXCHANGE PRIVILEGE. Shareholders may exchange their shares in the Portfolio
for shares of certain other Portfolios  comprising the Trust at their respective
net asset values beginning 15 days after purchase.  Contact Mentor  Distributors
for a  prospectus  of any of  those  Portfolios.  Shares  of the  Fund  are  not
available  in all  states.  To  exchange  shares,  simply  complete  an exchange
authorization form and send it to Mentor  Distributors.  Exchange  authorization
forms  are  available  from the Trust and from  Mentor  Distributors.  The Trust
reserves  the right to change or suspend  the  exchange  privilege  at any time.
Shareholders  would be notified  before any such change or  suspension.  Consult
Mentor Distributors before requesting an exchange.

MENTOR INSTITUTIONAL TRUST

     Mentor  Institutional Trust is a Massachusetts  business trust organized on
February  8,  1994  as IMG  Institutional  Trust.  A copy of the  Agreement  and
Declaration of Trust,  which is governed by  Massachusetts  law, is on file with
the Secretary of State of The Commonwealth of Massachusetts.

     The Trust is an  open-end  series  management  investment  company  with an
unlimited  number of  authorized  shares of beneficial  interest.  Shares of the
Trust may, without shareholder  approval,  be divided into two or more series of
shares representing  separate investment  portfolios.  Any such series of shares
may be further divided without shareholder  approval into two or more classes of
shares having such  preferences and special or relative rights and privileges as
the  Trustees  determine.  The Trust's  shares are  currently  divided into five
series, one representing the Portfolio, the others representing other Portfolios
with varying investment  objectives and policies.  Each share has one vote, with
fractional shares voting proportionally. Shares of each class will vote together
as

                                       -9-


<PAGE>



a single class except when required by law or determined by the Trustees. Shares
of the Portfolio are freely transferable,  are entitled to dividends as declared
by the Trustees,  and, if the Portfolio were  liquidated,  would receive the net
assets of the  Portfolio.  The Trust may  suspend the sale of shares at any time
and may refuse any order to purchase  shares.  Although  the  Portfolio  and the
Trust are not required to hold annual meetings of its shareholders, shareholders
have the right to call a meeting to elect or remove  Trustees,  or to take other
actions as provided in the Agreement and Declaration of Trust.

     In the interest of economy and  convenience,  the Portfolio  will not issue
certificates for its shares except at the shareholder's request.

CUSTODIAN AND TRANSFER AND DIVIDEND AGENT

     Investors  Fiduciary  Trust  Company,  127 West 10th  Street,  Kansas City,
Missouri 64105, serves as the Portfolio's custodian. State Street Bank and Trust
Company,  c/o Boston  Financial Data  Services,  Inc., 2 Heritage  Drive,  North
Quincy,  Massachusetts  02171,  serves as the Portfolio's  transfer and dividend
agent.

PERFORMANCE INFORMATION

     Yield  and  total  return  data  may  from  time  to time  be  included  in
advertisements  about the Portfolio.  The  Portfolio's  "yield" is calculated by
dividing the  Portfolio's  annualized net  investment  income per share during a
recent  30-day  period  by its net asset  value on the last day of that  period.
"Total  return" for the life of the Portfolio  through the most recent  calendar
quarter  represents  the actual rate of return on an investment of $1,000 in the
Portfolio  over the  period.  The  Portfolio's  performance  may be  compared to
various indices. See the Statement of Additional Information. Information may be
presented in  advertisements  about the Portfolio  describing the background and
professional  experience of the Portfolio's investment adviser or its investment
personnel.

     All data is based on the Portfolio's  past investment  results and does not
predict future performance. Investment performance, which will vary, is based on
many factors,  including market  conditions,  the composition of the Portfolio's
investments, and the Portfolio's operating expenses. Investment performance also
often reflects the risks associated with the Portfolio's  investment  objectives
and policies.  These factors should be considered when comparing the Portfolio's
investment results to those of other mutual funds and other investment vehicles.


                                      -10-


<PAGE>





     No  person  has  been  authorized  to give any  information  or to make any
representations  other than those  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 Portfolio.  This Prospectus does not constitute an
offer in any State in which,  or to any person to whom,  such  offering  may not
lawfully be made. This  Prospectus  omits certain  information  contained in the
Registration  Statement,  to which reference is made,  filed with the Securities
and Exchange Commission.  Items which are thus omitted,  including contracts and
other  documents  referred to or  summarized  herein,  may be obtained  from the
Commission upon payment of the prescribed fees.

     Additional  information  concerning  the secu rities offered hereby and the
Portfolio  is to be  found  in the  Registration  Statement,  including  various
exhibits  thereto and financial  statements  included or  incorporated  therein,
which may be inspected at the office of the Commission.


   
                                     MENTOR
                                    PERPETUAL
                                  INTERNATIONAL
                                    PORTFOLIO
    








                                   ----------

                                   PROSPECTUS

                                   ----------









                            Mentor Distributors, Inc.







<PAGE>

   
Part B to Amendment No. 5 to the Registrant's Registration Statement on Form
N-1A (File No. 33-80784) filed on March 11, 1996, which includes the Statement
of Additional Information of Mentor Institutional Trust and the SNAP Portfolio
and various financial information in respect thereof, is incorporated herein by
reference.

    

   

                           MENTOR INSTITUTIONAL TRUST

                         Supplement Dated May 23, 1996
                                       to
            Statement of Additional Information Dated March 11, 1996

         The Statement of Additional Information of Mentor Institutional Trust
dated March 11, 1996 in respect of the Mentor Cash Management Portfolio, Mentor
Fixed-Income Portfolio, Mentor Intermediate Duration Portfolio, and Mentor
Perpetual International Portfolio (referred to as the "Mentor International
Portfolio" in the Statement of Additional Information)  is amended by adding the
following as the third paragraph of Page 27:
    
   
         "Under its Management Contract dated May 15, 1996, Mentor Perpetual
International Portfolio pays a quarterly fee to Mentor Perpetual Advisors,
L.L.C. based on the average net assets of that Portfolio, as determined at the
close of each business day during the quarter at the annual rate of 1.00% of
average net assets."
    

   
         The following paragraph is added to page 26 as the last paragraph in
the section "Investment Advisory and Other Services":

         Rod Smyth, Managing Director of Mentor Perpetual, is responsible for
overseeing the investments and day-to-day operations of the Mentor Perpetual
joint venture. From his office in Richmond, Virginia he is the primary contact
for marketing and client service for the joint venture. Mr. Smyth has 12 years
of investment experience, including positions as market strategist (two years),
portfolio manager (five years) and institutional salesperson (five years). His
previous employers include Baring Securities, Ulster Bank Investment Managers,
Citicorp Scrimgeour Vickers, and Nomura International. He holds an M.A. in
economics, with honors, from Dundee University.
    

PART C.  OTHER INFORMATION

Item 24. Financial Statements and Exhibits
   
(a)         Financial Statements and Supporting Schedules (Included in Parts A
            and B)(7)
    
     (1)    Mentor Cash Management Portfolio, Mentor Fixed-Income Portfolio, and
            Mentor Intermediate Duration Portfolio:


                Statement  of  Assets  and  Liabilities  --  October  31,  1995.
                Statement  of  Operations  -- period  ended  October  31,  1995.
                Statement of Changes in Net Assets -- period  ended  October 31,
                1995.
                Financial Highlights.
                Notes to Financial Statements.
                Portfolio of Investments -- October 31, 1995.
                Independent Auditors Report

     (2)     SNAP FUND (unaudited):

                Statement  of  Assets  of  Liabilities  --  December  31,  1995.
                Statement of Operations  -- six months ended  December 31, 1995.
                Statement of Changes in Net Assets -- six months ended  December
                  31, 1995.
                Financial Highlights.
                Notes to Financial Statements.
                Portfolio of Investments -- December 31, 1995.

(b)      Exhibits

     (1)
         (A)    -   Agreement and Declaration of Trust.1
         (B)    -   Amendment to Agreement and Declaration of Trust.4
     (2)        -   Bylaws.1
     (3)        -   Inapplicable.
     (4)
         (A)    -   Form of certificate representing shares of beneficial
                    interest for each of the Portfolios.1
         (B)    -   Portions of Agreement and Declaration of Trust Relating to
                    Shareholders' Rights.1
         (C)    -   Portions of Bylaws Relating to Shareholders' Rights.1
     (5)
         (A) - Form of Management  Contract.1 (B) - Form of Management  Contract
         (SNAP Fund).5
   
         (C) - Form of Management  Contract (Mentor Perpetual International
               Portfolio).8
    
         (D) - Form of Administration Agreement.1
     (6) (A)    -   Form of Distribution Agreement.2

                                                      -1-

<PAGE>


     (6) (B)    -   Form of Assignment of Distribution Agreement.5
     (7)        -   Inapplicable.
     (8)
         (A) - Form of Custody Agreement.1
         (B) - Form of Custody Agreement (SNAP Fund).5
         (C) - Form of Transfer Agency and Services Agreement.3
         (D) - Form of Transfer Agency and Services Agreement (SNAP Fund).5
     (9)     - Inapplicable.
     (10)    - Opinion of counsel, including consent.3
   
     (11)    - Consent of Independent Accountants.8
    
     (12)    - Inapplicable.
     (13)    - Inapplicable.
     (14)    - Inapplicable.
     (15)    - Inapplicable.
     (16)    - Schedules for Computation of Performance.7
   
     (27)(a)    Financial Data Schedule -- Mentor Cash Management Portfolio 8
         (b)    Financial Data Schedule -- Mentor Intermediate Duration
                Portfolio 8
         (c)    Financial Data Schedule -- Mentor Fixed-Income Portfolio 8
         (d)    Financial Data Schedule -- SNAP Fund 8
    

     1   Incorporated   herein  by   reference  to  the   Registrant's   initial
         Registration Statement on Form N-1A under the Investment Company Act of
         1940 filed on April 15, 1994.

   
     2   Incorporated herein by reference to Registrant's initial Registration
         Statement on Form N-1A under the Securities Act of 1933 on Form  N-1A
         filed on June 28, 1994.

    

   
     3   Incorporated herein by reference to Pre-Effective Amendment No. 2 to
         the Registrant's Registration Statement on Form N-1A filed on November
         18, 1994.

    

   
     4   Incorporated herein by reference to Amendment No. 1 to the Registrant's
         Registration Statement on Form  N-1A filed on July 3, 1995.

    

   
     5   Incorporated herein by reference to Amendment No. 2 to the Registrant's
         Registration Statement on Form N-1A filed on July 24, 1995.

    

   
     6   Incorporated herein by reference to Amendment No. 3 to the Registrant's
         Registration Statement on Form N-1A filed on September 5, 1995.

    

   
     7   Incorporated herein by reference to Amendment No. 5 to the Registrant's
         Registration Statement on Form N-1A filed on March 11, 1996.

    

   
     8   Filed herewith.      Item 25. Persons Controlled by or Under Common
         Control with Registrant

            None.

Item 26. Number of Record Holders of Securities

            The following  table shows the number of holders of record of shares
of beneficial interest of each series of shares of beneficial interest of Mentor
Institutional Trust as of May 15, 1996.


                                                      -2-

<PAGE>

   

                                                       Number of Record
                  Series                                    Holders

         Mentor Cash Management Portfolio                     68
         SNAP Fund                                           453
         Mentor Intermediate Duration Portfolio               10
         Mentor Fixed-Income Portfolio                       195
         Mentor Perpetual International Portfolio              1

    


Item 27.  Indemnification

     The information  required by this item is incorporated  herein by reference
from the  Registrant's  Initial  Registration  Statement  on Form N-1A under the
Investment Company Act of 1940 (File No. 811-8484).

Item 28. Business and Other Connections of Investment Adviser

         (a) Commonwealth  Investment  Counsel,  Inc., the investment adviser of
the Mentor Cash Management,  Fixed-Income,  and Intermediate Duration Portfolios
and the SNAP Fund, serves as investment  adviser to Cash Resource Trust,  Mentor
Balanced Portfolio,  Mentor Quality Income Portfolio,  and Mentor Short-Duration
Portfolio,  each of which is an open-end investment  company,  and Mentor Income
Fund, Inc., a closed-end investment company.

         The following is additional  information  with respect to the directors
and officers of Commonwealth Investment Counsel, Inc.:

<TABLE>
<CAPTION>
                                                              OTHER SUBSTANTIAL
                                                              BUSINESS, PROFESSION,
                                                              VOCATION OR EMPLOYMENT
                                 POSITION WITH THE            DURING THE PAST TWO
NAME                             INVESTMENT ADVISER           FISCAL YEARS

<S>                             <C>                           <C>

John G. Davenport               President; Director            None

William F. Johnston, III        Senior Vice President          None

P. Michael Jones                Senior Vice President          None


                                                      -3-


<PAGE>


</TABLE>
<TABLE>
<CAPTION>
<S>                             <C>                           <C>
R. Preston Nuttall              Senior Vice President         Formerly, Senior Vice
                                                              President, Capitoline
                                                              Investment Services, 919
                                                              East Main Street,
                                                              Richmond, VA 23219

Mary A. Beeghly                 Vice President                None

John J. Kelly                   Vice President                None

William H. West, Jr.            Vice President                Vice President, Mentor
                                                              Income Fund, Inc., 901
                                                              East Byrd Street,
                                                              Richmond, VA 23219;
                                                              formerly, Vice President of
                                                              Ryland Capital
                                                              Management, Inc., 11000
                                                              Broken Land Parkway,
                                                              Columbia, MD 21044;
                                                              formerly, Vice President,
                                                              RAC Income Fund, Inc.,
                                                              11000 Broken Land
                                                              Parkway, Columbia, MD
                                                              21044

Steven C. Henderson             Vice President                None

Stephen R. McClelland           Associate Vice President      Formerly, Associate Vice
                                                              President, Mentor
                                                              Investment Group, Inc.,
                                                              901 East Byrd Street,
                                                              Richmond, VA  23219
</TABLE>


                                                      -4-


<PAGE>

<TABLE>
<CAPTION>
<S>                             <C>                           <C>
Thomas Lee Souders              Treasurer                     Managing Director and
                                                              Chief Financial Officer,
                                                              Wheat,  First Securities,
                                                              Inc., 901 East Byrd Street,
                                                              Richmond,  VA  23219;
                                                              Trustee,  Mentor  Series
                                                              Trust,  901 East  Byrd
                                                              Street, Richmond, VA
                                                              23219; formerly, Manager
                                                              of Internal Audit, Heilig
                                                              Myers;  formerly, Manager,
                                                              Peat Marwick & Mitchell
                                                              & Company

John Michael Ivan               Secretary                     Managing Director, Senior
                                                              Vice President and
                                                              Assistant General Counsel,
                                                              Wheat, First  Securities,
                                                              Inc.,  901 East Byrd Street,
                                                              Richmond,  VA 23219;
                                                              Managing Director and
                                                              Assistant Secretary, Wheat
                                                              First Butcher Singer, Inc.
                                                              (formerly WFS Financial
                                                              Corporation),  901 East
                                                              Byrd Street,  Richmond,
                                                              VA 23219; Clerk, Cash
                                                              Resource Trust, 901 East
                                                              Byrd Street,  Richmond,
                                                              VA 23219; Secretary, The
                                                              Mentor Funds, 901 East
                                                              Byrd Street, Richmond,
                                                              VA 23219

</TABLE>

                                                      -5-


<PAGE>



   
         (b) The  following  is  additional  information  with respect to Mentor
Perpetual Advisors,  L.L.C., the investment adviser to the Mentor Perpetual
International Portfolio:
    
<TABLE>
<CAPTION>
                                         POSITION WITH                           VOCATION OR EMPLOYMENT
         NAME                         INVESTMENT ADVISER                    DURING THE PAST TWO FISCAL YEARS
<S>                                   <C>                                   <C>

Scott A. McGlashan                        President                           Director, Perpetual
                                                                              Portfolio Management
                                                                              Limited

Martyn Arbib                              Director                            Chairman, Perpetual
                                                                              Portfolio Management
                                                                              Limited

Roger C. Cornick                          Director                            Deputy Chairman -
                                                                              Marketing, Perpetual
                                                                              Portfolio Management
                                                                              Limited

Paul F. Costello                          Director                            Managing Director,
                                                                              Mentor Investment Group,
                                                                              Inc. and Managing
                                                                              Director, Wheat First
                                                                              Butcher Singer, Inc.

Daniel J. Ludeman                         Director                            Chairman and Chief
                                                                              Executive Officer, Mentor
                                                                              Investment Group;
                                                                              Managing Director, Wheat
                                                                              First Securities, Inc.;
                                                                              Managing Director, Wheat
                                                                              First Butcher Singer, Inc.

David S. Mossop                           Director                            Director, Perpetual
                                                                              Portfolio Management
                                                                              Limited

Richard J. Rossi                          Director                            Managing Director,
                                                                              Mentor Investment Group,
                                                                              Inc.

</TABLE>



                                                      -6-


<PAGE>



Item 29. Principal Underwriters

            (a) Mentor Distributors, Inc. currently is acting as principal
underwriter for The Mentor Funds and Cash Resource Trust.

            (b)  The following is information concerning officers and directors
of Mentor Distributors, Inc.:

<TABLE>
<CAPTION>

NAME AND PRINCIPAL                       POSITION AND OFFICES            POSITIONS AND OFFICES
BUSINESS ADDRESS                         WITH UNDERWRITERS               WITH REGISTRANT
<S>                                      <C>                             <C>

Peter J. Quinn, Jr.                      President and                          --
901 East Byrd Street                     Director, Mentor
Richmond, VA  23219                      Distributors, Inc.

Paul F. Costello                         Senior Vice President,               President
901 East Byrd Street                     Mentor Distributors,
Richmond, VA  23219                      Inc.

Thomas Lee Souders                       Treasurer, Mentor                      --
901 East Byrd Street                     Distributors, Inc.
Richmond, VA  23219

John Mark Harris                         Secretary, Mentor                      --
901 East Byrd Street                     Distributors, Inc.
Richmond, VA  23219

John Michael Ivan                        Assistant Secretary,                 Secretary
901 East Byrd Street                     Mentor Distributors,
Richmond, VA  23219                      Inc.

</TABLE>

         (c)  Registrant has no principal underwriter who is not an affiliate of
              the Registrant.

Item 30.       Location of Accounts and Records

               Persons maintaining  physical  possession of accounts,  books and
other  documents  required to be maintained  by Section 31(a) of the  Investment
Company  Act of 1940  and the  Rules  promulgated  thereunder  are  Registrant's
Secretary,  John M. Ivan,  Registrant's  custodians,  Investors  Fiduciary Trust
Company  ("IFTC") (all Portfolios  other than SNAP Fund),  and Central  Fidelity
National  Bank  (SNAP Fund  only),  and  Registrant's  transfer  agents,  State
Street Bank and Trust Company (through Boston Financial Data Services,  Inc.
("BFDS")) (all Portfolios  other than SNAP Fund), and Central Fidelity National

                                                      -7-


<PAGE>



Bank (SNAP Fund only).  The address of the  Secretary  is 901 East Byrd  Street,
Richmond,  Virginia,  23219.  The  address  of BFDS is 2 Heritage  Drive,  North
Quincy, Massachusetts 02171. The address of IFTC is 127 West 10th Street, Kansas
City,  Missouri,  64105. The address of Central  Fidelity  National Bank is 1021
East Cary Street, P.O. Box 27602, Richmond, Virginia 23261.

Item 31.       Management Services

               None.

Item 32.       Undertakings

(a)  The Registrant undertakes to furnish to each person to whom a prospectus of
     the Registrant is delivered a copy of the Registrant's latest annual report
     to shareholders, upon request are without change.

(b)            Inapplicable.

(c)  Inapplicable.

(d)            The undersigned Registrant hereby undertakes to call a meeting of
               shareholders  for the  purpose  of  voting  on the  removal  of a
               trustee or  trustees  when  requested  in writing to do so by the
               holders of at least 10% of the  Registrant's  outstanding  voting
               securities and in connection with such meeting to comply with the
               provisions of Section 16(c) of the Investment Company Act of 1940
               relating to shareholder communications.


                                                      NOTICE

               A copy of the  Agreement  and  Declaration  of  Trust  of  Mentor
Institutional  Trust is on file with the Secretary of State of The  Commonwealth
of Massachusetts, and notice is hereby given that this instrument is executed on
behalf of the  Registrant by an officer of the  Registrant as an officer and not
individually  and that the  obligations of or arising out of this instrument are
not binding upon any of the Trustees, officers, or shareholders individually but
are binding only upon the assets and property of the Registrant.

                                                      -8-


<PAGE>



                                                    SIGNATURES
   
               Pursuant to the  requirements  of the  Securities Act of 1933 and
the Investment  Company Act of 1940, the Registrant has duly caused this
Amendment to the  Registration  Statement  to be  signed  on  behalf  of the
undersigned, thereunto duly  authorized,  in the City of Richmond,  and the
Commonwealth  of Virginia on this 23rd day of May, 1996.
    
                                                     MENTOR INSTITUTIONAL TRUST



                                                        By: /s/ PAUL F. COSTELLO
                                                            Paul F. Costello
                                                            Title:  President

              Pursuant to the  requirements  of the Securities Act of 1933, this
Amendment to the  Registration  Statement has been signed below by the following
persons in the capacities indicated on the dates indicated.

<TABLE>
<CAPTION>

         SIGNATURE                         TITLE                                 DATE
<S>                                       <C>                               <C>

- --------------------------------           Trustee
Arnold H. Dreyfuss


- --------------------------------           Trustee
Thomas F. Keller

   
            *                              Trustee                          May 23, 1996
- --------------------------------
Daniel J. Ludeman
    
   
             *                             Trustee                          May 23, 1996
- --------------------------------
Louis W. Moelchert, Jr.
    

</TABLE>
                                                -9-


<PAGE>

<TABLE>
<CAPTION>
<S>                                       <C>                               <C>
   
             *                             Trustee                          May 23, 1996
- --------------------------------
Stanley F. Pauley

             *                             Trustee                          May 23, 1996
- ---------------------------------
Troy A. Peery, Jr.

/s/ PAUL F. COSTELLO                       President                        May 23, 1996
- ---------------------------
Paul F. Costello                           (Principal  Executive Officer)



/s/ TERRY L. PERKINS                       Treasurer                        May 23, 1996
- --------------------------
Terry L. Perkins                           (Principal Financial and
                                              Accounting Officer)


*By /s/ PAUL F. COSTELLO                                                    May 23, 1996
   ----------------------
       Paul F. Costello
       Attorney-in-Fact
    

</TABLE>


                                                      -10-


<PAGE>


                                                   EXHIBIT INDEX


                     Exhibit                            Page
   
(5)                  Form of Management contract
                     (Mentor Perpetual International Portfolio)
    
(11)                 Consent of Independent
                     Accountants

   

    

(27)(a)              Financial Data Schedule --
                     Mentor Cash Management
                     Portfolio

(27)(b)              Financial Data Schedule --
                     Mentor Intermediate
                     Duration Portfolio

(27)(c)              Financial Data Schedule --
                     Mentor Fixed-Income
                     Portfolio

(27)(d)              Financial Data Schedule --
                     SNAP Fund



                                                      -11-




                                                  Exhibit 5


                         MENTOR INSTITUTIONAL TRUST

                            MANAGEMENT CONTRACT
   
     This Management Contract dated as of May   , 1996 between MENTOR
INSTITUTIONAL TRUST, a Massachusetts business trust (the "Trust"), on behalf of
Mentor Perpetual International Portfolio (the "Fund"), a series of shares of
beneficial interest of Trust, and Mentor Perpetual Advisors L.L.C., a Virginia
corporation (the "Manager")
    
     WITNESSETH:

     That in consideration of the mutual covenants herein contained, it is
agreed as follows:

1.  SERVICES TO BE RENDERED BY THE MANAGER TO FUND.

     (a)  The Manager, at its expense, will furnish continuously an
investment program for   the Fund, will determine what investments shall be
purchased, held, sold, or exchanged by the Fund and what portion, if any,
of the assets of the Fund shall be held uninvested and shall, on behalf of
the Fund, make changes in the Fund's investments.  In the performance of
its duties, the Manager will comply with the provisions of the Agreement
and Declaration of Trust and Bylaws of the Trust and the Fund's stated
investment objectives, policies, and restrictions, and will use its best
efforts to safeguard and promote the welfare of the Trust and to comply
with other policies which the Trustees may from time to time determine and
shall exercise the same care and diligence expected of the Trustees.

     (b)  The Manager, at its expense,  will furnish (i) all necessary
investment and related management facilities, including, salaries of
personnel, required for it to execute its duties faithfully, (ii) suitable
office space for the Trust, and (iii) administrative facilities, including
bookkeeping, clerical personnel, and equipment necessary for the efficient
performance of its obligations.  The Manager will pay the compensation, if
any, of certain officers of the Trust.

     (c)  The Manager, at its expense, shall place all orders for the
purchase and sale of portfolio investments for the Fund's account with
brokers or dealers selected by the Manager.  In the selection of such
brokers or dealers and the placing of such orders, the Manager shall give
primary consideration to securing for the Fund the most favorable price and
execution available, except to the extent it may be permitted to pay higher
brokerage commissions for brokerage and research services as described
below.  In doing so, the Manager, bearing in mind the Trust's best
interests at all times, shall consider all factors it deems relevant,
including, by way of illustration, price, the size of the transaction, the
nature of the market for the security, the amount of the commission, the
timing of the transaction taking into account market prices and trends, the

<PAGE>



reputation, experience, and financial stability of the broker or dealer
involved, and the quality of service rendered by the broker or dealer in
other transactions.  Subject to such policies as the Trustees of the Trust
may determine, the Manager shall not be deemed to have acted unlawfully or
to have breached any duty created by this Contract or otherwise solely by
reason of its having caused the Fund to pay a broker or dealer that
provides brokerage and research services to the Manager an amount of
commission for effecting a portfolio investment transaction in excess of
the amount of commission that another broker or dealer would have charged
for effecting that transaction, if the Manager determines in good faith
that such amount of commission was reasonable in relation to the value of
the brokerage and research services provided by such broker or dealer,
viewed in terms of either that particular transaction or the Manager's
overall responsibilities with respect to the Fund and to other clients of
the Manager as to which the Manager exercises investment discretion.

     (d)  The Trust, on behalf of the Fund, hereby authorizes any entity or
person associated with the Manager which is a member of a national
securities exchange to effect any transaction on the exchange for the
account of the Fund which is permitted by Section 11(a) of the Securities
Exchange Act of 1934 and Rule 11a2-2(T) thereunder, and the Fund hereby
consents to the retention of compensation for such transactions in
accordance with Rule 11a2-2(T)(2)(iv).

2.  OTHER AGREEMENTS, ETC.

     It is understood that any of the shareholders, Trustees, officers, and
employees of the Trust may be a shareholder, director, officer, or employee
of, or be otherwise interested in, the Manager, and in any person
controlled by or under common control with the Manager, and that the
Manager and any person controlled by or under common control with the
Manager may have an interest in the Trust.  It is also understood that the
Manager and any person controlled by or under common control with the
Manager have and may have advisory, management, service, or other contracts
with other organizations and persons, and may have other interests and
business.
   
3.  COMPENSATION TO BE PAID BY THE PORTFOLIO TO THE MANAGER.

     As compensation for the services performed and the facilities furnished and
expenses assumed by the Manager, including the services of any consultants
retained by the Manager, the Portfolio shall pay the Manager, as promptly as
possible after the last day of each month, a fee, calculated daily, of 1.00%
annually of the Portfolio's average daily net assets. The first payment of the
fee shall be made as promptly as possible at the end of the month next
succeeding the effective date of this Agreement, and shall constitute a full
payment of the fee due the Manager for all services prior to that date. If this
Agreement is terminated as of any date that is not the last day of a month, such
fee shall be paid as promptly as possible after such date of termination, shall
be based on the average daily net assets of the Portfolio in that period from
the beginning of such month to such date of termination, and shall be that
proportion of such average daily net assets as the number of business days in
such period bears to the number of business days in such month. The average
daily net assets of the Portfolio shall in all cases be based only on business
days and be computed as of the time of the regular close of business of the New
York Stock Exchange, or such other time as may be determined by the Trustees.
Each such payment shall be accompanied by a report of the Trust prepared either
by the Trust or by a reputable firm of independent accountants which shall show
the amount properly payable to the Manager under this Agreement and the detailed
computation thereof.
    
   
4.  ASSIGNMENT TERMINATES THIS CONTRACT; AMENDMENTS OF THIS CONTRACT.
    
     This Contract shall automatically terminate, without the payment of
any penalty, in the event of its assignment; and this Contract shall not be
amended unless such amendment be approved at a meeting by the affirmative
vote of a majority of the outstanding shares of the  Fund, and by the vote,
cast in person at a meeting called for the purpose of voting on such
approval, of a majority of the Trustees of the Trust who are not interested
persons of the Trust or of the Manager.
   
5.  EFFECTIVE PERIOD AND TERMINATION OF THIS CONTRACT.

     This Contract shall become effective upon its execution and shall remain in
full force and effect continuously thereafter until the close of business on
May   , 1998 (unless terminated automatically as set forth in Section 4), and
shall continue for successive one-year periods thereafter, if approved in
accordance with Section 6, until terminated by either party hereto at any time
by not more than sixty days nor less than thirty days written notice delivered
or mailed by registered mail, postage prepaid, to the other party.  Such action
by the Trust with respect to termination may be taken either (i) by vote of a
majority of its Trustees, or (ii) by the affirmative vote of a majority of the
outstanding shares of the Fund.
    
   
     Termination of this Contract pursuant to this Section 5 will be
without the payment of any penalty.
    
   
6.  ANNUAL APPROVAL.
    
     For additional terms after the initial term of this Contract, this
Contract shall be submitted for approval to the Trustees annually and shall
continue in effect only so long as specifically approved annually by vote
of a majority of the Trustees of the Trust who are not interested persons
of the Trust or of the Manager, by vote cast in person at a meeting called
for the purpose of voting on such approval.
   
7.  CERTAIN DEFINITIONS.
    
     For the purposes of this Contract, the "affirmative vote of a majority
of the outstanding shares" of the Fund means the affirmative vote, at a
duly called and held meeting of such shareholders, (a) of the holders of
67% or more of the shares of the Fund present (in person or by proxy) and
entitled to vote at such meeting, if the holders of more than 50% of the

<PAGE>



outstanding shares of the Fund entitled to vote at such meeting are present
in person or by proxy, or (b) of the holders of more than 50% of the
outstanding shares of the Fund entitled to vote at such meeting, whichever
is less.

     For the purposes of this Contract, the terms "affiliated person",
"control", "interested person," and "assignment" shall have their
respective meanings defined in the Investment Company Act of 1940, as
amended, and the Rules and Regulations thereunder, subject, however, to
such exemptions as may be granted by the Securities and Exchange Commission
under said Act; the term "specifically approve at least annually" shall be
construed in a manner consistent with the Investment Company Act of 1940,
as amended, and the Rules and Regulations thereunder; and the term
"brokerage and research services" shall have the meaning given in the
Securities Exchange Act of 1934, as amended, and the Rules and Regulations
thereunder.
   
8.  NON-LIABILITY OF MANAGER.
    
     In the absence of willful misfeasance, bad faith, or gross negligence
on the part of the Manager, or reckless disregard of its obligations and
duties hereunder, the Manager shall not be subject to any liability to the
Trust or to any shareholder of the Trust for any act or omission in the
course of, or connected with, rendering services hereunder.
   
9.  LIMITATION OF LIABILITY OF THE TRUSTEES AND SHAREHOLDERS.
    
     A copy of the Agreement and Declaration of Trust of the Trust is on
file with the Secretary of State of The Commonwealth of Massachusetts, and
notice is hereby given that this instrument is executed on behalf of the
Trustees of the Trust as Trustees and not individually and that the
obligations of this instrument are not binding upon any of the Trustees,
officers, or shareholders of the Trust but are binding only upon the assets
and property of the Trust.

     IN WITNESS WHEREOF, MENTOR INSTITUTIONAL TRUST and Mentor Perpetual
Advisors L.L.C., have each caused this instrument to be signed in duplicate
in its behalf by its President or Vice President thereunto duly authorized,
all as of the day and year

<PAGE>

first above written.  This document is executed by each of the parties
hereto under seal.  This Agreement shall be governed and construed in
accordance with the laws (other than conflict of laws rules) of The
Commonwealth of Massachusetts.
   
                        MENTOR INSTITUTIONAL TRUST
                        On behalf of Mentor Perpetual International Portfolio
    

                        By:___________________________________


                        MENTOR PERPETUAL ADVISORS L.L.C..


                        By:___________________________________







                 CONSENT OF INDEPENDENT ACCOUNTANTS



The Trustees and Shareholders
Mentor Institutional Trust
   
     We consent to the use of our report dated December 8, 1995, incorporated by
reference herein, and to the reference to our firm under the captions "FINANCIAL
HIGHLIGHTS" in the prospectus for the Mentor Cash Management Portfolio, Mentor
Intermediate Duration Portfolio, Mentor Fixed-Income Portfolio and Mentor
International Portfolio, and "INDEPENDENT ACCOUNTANTS" in the Statements of
Additional Information for the Mentor Cash Management Portfolio, Mentor
Intermediate Duration Portfolio, Mentor Fixed-Income Portfolio, Mentor Perpetual
International Portfolio and SNAP Fund.
    



                                               /s/  KPMG PEAT MARWICK, LLP
                                                    KPMG Peat Marwick, LLP

Boston, Massachusetts
   
May 21, 1996
    





<TABLE> <S> <C>

<ARTICLE> 6
<SERIES>
   <NUMBER> 01
   <NAME> CASH MANAGEMENT
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          OCT-31-1995
<PERIOD-END>                               OCT-31-1995
<INVESTMENTS-AT-COST>                       69,852,773
<INVESTMENTS-AT-VALUE>                      69,852,773
<RECEIVABLES>                                  158,110
<ASSETS-OTHER>                                       0
<OTHER-ITEMS-ASSETS>                            27,367
<TOTAL-ASSETS>                              70,038,250
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                       41,271
<TOTAL-LIABILITIES>                             41,271
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                    69,996,979
<SHARES-COMMON-STOCK>                       69,996,979
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                             0
<NET-ASSETS>                                69,996,979
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                            2,439,036
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                (16,235)
<NET-INVESTMENT-INCOME>                      2,422,801
<REALIZED-GAINS-CURRENT>                             0
<APPREC-INCREASE-CURRENT>                            0
<NET-CHANGE-FROM-OPS>                        2,442,801
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                    2,442,801
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                    137,216,173
<NUMBER-OF-SHARES-REDEEMED>               (69,627,001)
<SHARES-REINVESTED>                          2,407,807
<NET-CHANGE-IN-ASSETS>                      69,996,979
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                                0
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                 79,842
<AVERAGE-NET-ASSETS>                        47,481,607
<PER-SHARE-NAV-BEGIN>                             1.00
<PER-SHARE-NII>                                   0.05
<PER-SHARE-GAIN-APPREC>                           0.00
<PER-SHARE-DIVIDEND>                              0.05
<PER-SHARE-DISTRIBUTIONS>                         0.00
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                               1.00
<EXPENSE-RATIO>                                   0.04
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<SERIES>
   <NUMBER> 02
   <NAME> INTERMEDIATE DURATION
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          OCT-31-1995
<PERIOD-END>                               OCT-31-1995
<INVESTMENTS-AT-COST>                       11,970,839
<INVESTMENTS-AT-VALUE>                      12,126,849
<RECEIVABLES>                                  378,327
<ASSETS-OTHER>                                       0
<OTHER-ITEMS-ASSETS>                             5,362
<TOTAL-ASSETS>                              12,510,538
<PAYABLE-FOR-SECURITIES>                       536,418
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                        8,323
<TOTAL-LIABILITIES>                            544,741
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                    11,278,113
<SHARES-COMMON-STOCK>                          898,741
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                       54,440
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                        477,234
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                       156,010
<NET-ASSETS>                                11,965,797
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                              668,347
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                 (4,702)
<NET-INVESTMENT-INCOME>                        663,645
<REALIZED-GAINS-CURRENT>                       468,099
<APPREC-INCREASE-CURRENT>                      156,010
<NET-CHANGE-FROM-OPS>                        1,287,754
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                      600,070
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                        855,389
<NUMBER-OF-SHARES-REDEEMED>                    (2,488)
<SHARES-REINVESTED>                             45,840
<NET-CHANGE-IN-ASSETS>                      11,965,797
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                                0
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                 25,405
<AVERAGE-NET-ASSETS>                        11,111,285
<PER-SHARE-NAV-BEGIN>                            12.50
<PER-SHARE-NII>                                   0.78
<PER-SHARE-GAIN-APPREC>                           0.74
<PER-SHARE-DIVIDEND>                              0.71
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              13.31
<EXPENSE-RATIO>                                   0.05
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<SERIES>
   <NUMBER> 03
   <NAME> FIXED-INCOME
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          OCT-31-1995
<PERIOD-END>                               OCT-31-1995
<INVESTMENTS-AT-COST>                       34,145,405
<INVESTMENTS-AT-VALUE>                      35,192,798
<RECEIVABLES>                                  651,931
<ASSETS-OTHER>                                       0
<OTHER-ITEMS-ASSETS>                            27,048
<TOTAL-ASSETS>                              35,871,777
<PAYABLE-FOR-SECURITIES>                     1,609,254
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                      209,064
<TOTAL-LIABILITIES>                          1,818,318
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                    31,480,542
<SHARES-COMMON-STOCK>                        2,484,138
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                      172,353
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                      1,353,171
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                     1,047,393
<NET-ASSETS>                                34,053,459
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                            1,797,962
<OTHER-INCOME>                                       0
<EXPENSES-NET>                                (12,658)
<NET-INVESTMENT-INCOME>                      1,785,304
<REALIZED-GAINS-CURRENT>                     1,341,178
<APPREC-INCREASE-CURRENT>                    1,047,393
<NET-CHANGE-FROM-OPS>                        4,173,875
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                    1,600,958
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                      2,759,545
<NUMBER-OF-SHARES-REDEEMED>                  (396,079)
<SHARES-REINVESTED>                            120,672
<NET-CHANGE-IN-ASSETS>                      34,053,459
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                                0
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                 58,654
<AVERAGE-NET-ASSETS>                        28,843,062
<PER-SHARE-NAV-BEGIN>                            12.50
<PER-SHARE-NII>                                   0.81
<PER-SHARE-GAIN-APPREC>                           1.14
<PER-SHARE-DIVIDEND>                              0.74
<PER-SHARE-DISTRIBUTIONS>                            0
<RETURNS-OF-CAPITAL>                                 0
<PER-SHARE-NAV-END>                              13.71
<EXPENSE-RATIO>                                   0.05
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        


</TABLE>

<TABLE> <S> <C>

<ARTICLE> 6
<SERIES>
   <NUMBER> 03
   <NAME> SNAP
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          OCT-31-1995
<PERIOD-END>                               DEC-31-1995
<INVESTMENTS-AT-COST>                      896,192,940
<INVESTMENTS-AT-VALUE>                     896,192,940
<RECEIVABLES>                                1,507,855
<ASSETS-OTHER>                                       0
<OTHER-ITEMS-ASSETS>                           318,486
<TOTAL-ASSETS>                             898,019,281
<PAYABLE-FOR-SECURITIES>                             0
<SENIOR-LONG-TERM-DEBT>                              0
<OTHER-ITEMS-LIABILITIES>                      327,908
<TOTAL-LIABILITIES>                            327,908
<SENIOR-EQUITY>                                      0
<PAID-IN-CAPITAL-COMMON>                   897,691,373
<SHARES-COMMON-STOCK>                      897,691,373
<SHARES-COMMON-PRIOR>                                0
<ACCUMULATED-NII-CURRENT>                            0
<OVERDISTRIBUTION-NII>                               0
<ACCUMULATED-NET-GAINS>                              0
<OVERDISTRIBUTION-GAINS>                             0
<ACCUM-APPREC-OR-DEPREC>                             0
<NET-ASSETS>                               897,691,373
<DIVIDEND-INCOME>                                    0
<INTEREST-INCOME>                           18,653,166
<OTHER-INCOME>                                       0
<EXPENSES-NET>                               (385,865)
<NET-INVESTMENT-INCOME>                     18,267,301
<REALIZED-GAINS-CURRENT>                             0
<APPREC-INCREASE-CURRENT>                            0
<NET-CHANGE-FROM-OPS>                       18,267,301
<EQUALIZATION>                                       0
<DISTRIBUTIONS-OF-INCOME>                   18,267,301
<DISTRIBUTIONS-OF-GAINS>                             0
<DISTRIBUTIONS-OTHER>                                0
<NUMBER-OF-SHARES-SOLD>                  1,406,368,293
<NUMBER-OF-SHARES-REDEEMED>              (524,944,221)
<SHARES-REINVESTED>                         18,267,301
<NET-CHANGE-IN-ASSETS>                     897,691,373
<ACCUMULATED-NII-PRIOR>                              0
<ACCUMULATED-GAINS-PRIOR>                            0
<OVERDISTRIB-NII-PRIOR>                              0
<OVERDIST-NET-GAINS-PRIOR>                           0
<GROSS-ADVISORY-FEES>                          276,448
<INTEREST-EXPENSE>                                   0
<GROSS-EXPENSE>                                385,865
<AVERAGE-NET-ASSETS>                       723,444,873
<PER-SHARE-NAV-BEGIN>                              1.0
<PER-SHARE-NII>                                   0.02
<PER-SHARE-GAIN-APPREC>                           0.00
<PER-SHARE-DIVIDEND>                              0.00
<PER-SHARE-DISTRIBUTIONS>                         0.02
<RETURNS-OF-CAPITAL>                              0.00
<PER-SHARE-NAV-END>                               1.00
<EXPENSE-RATIO>                                   2.55
<AVG-DEBT-OUTSTANDING>                               0
<AVG-DEBT-PER-SHARE>                                 0
        

</TABLE>


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