LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
485BPOS, 1994-02-22
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THIS CONFORMING PAPER FORMAT DOCUMENT IS BEING SUBMITTED
	PURSUANT TO RULE 901(d) OF REGULATION S-T

As filed with the Securities and Exchange Commission on February 18, 1994
					        Securities Act File No.  33-55034
					Investment Company Act File No.  811-7364
= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = 

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
___________________

FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933		/X/

	Pre-Effective Amendment No.    ____					/_/
   
	Post-Effective Amendment No.    4  					/X/
    
and/or

REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940	/X
   
	Amendment No.    9  							/X/

    
   
Lehman Brothers Institutional Funds Group Trust
(Exact Name of Registrant as Specified in Charter)

	One Exchange Place
	Boston, Massachusetts  						02109
	(Address of Principal Executive Offices)			(Zip Code)

Registrant's Telephone Number, including Area Code:	(617) 248-3503

    
   
Patrricia L. Bickimer, Esq.
The Boston Company Advisors, Inc.
One Exchange Place
Boston, Massachusetts 02109
(Name and Address of Agent for Service)
    
Copies to:

Burton M. Leibert, Esq.
Willkie Farr & Gallagher
One Citicorp Center
153 East 53rd Street
New York, New York 10022

	It is proposed that this filing will become effective 
	(check appropriate box):
   
	  X  immediately upon filing pursuant to paragraph (b), or
	_____on_________pursuant to paragraph (b)
	     60 days after filing pursuant to paragraph (a), or
	_____on_________pursuant to paragraph (a) of Rule 485
    
												
The Registrant has previously filed a declaration of indefinite registration 
of its shares pursuant to Rule 24f-2 under the Investment Company Act of 1940, 
as amended. Registrant's Rule 24f-2 Notice for the fiscal year ending January 
31, 1994 will be filed on or before March 31, 1994

Page 1 of____Pages

LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
FORM N-1A
CROSS REFERENCE SHEET
PURSUANT TO RULE 495(a)

Part A
Item No.	Prospectus Heading


1. Cover Page		Cover Page

2. Synopsis		Background and Expense
			Information; Performance 		Information

3. Condensed Financial
	Information...............................	Not Applicable

4. General Description of
	Registrant		Cover Page; Investment
			Objective and Policies;
			Description of Shares

5. Management of the Fund		Management of the Fund;
			Dividends

6. Capital Stock and Other
	Securities		Cover Page; Dividends; 
			Taxes; Description of 
			Shares

7. Purchase of Securities		Purchase and Redemption 
			of Shares; Management
			of the Fund

8. Redemption or Repurchase		Purchase and Redemption 
			of Shares

9. Legal Proceedings		Not Applicable




Part B	Heading in Statement
Item No.	of Additional Information

10. Cover Page		Cover Page

11. Table of Contents		Table of Contents

12. General Information and
	 History		The Trust; Management of
			the Fund;

13. Investment Objectives and
	 Policies		Investment Objective and
			Policies

14. Management of the Fund		Management of the Fund

15. Control Persons and Principal
	 Holders of Securities		Management of the Fund

16. Investment Advisory and
	 Other Services		Management of the Fund

17. Brokerage Allocation		Investment Objective and
			Policies

18. Capital Stock and Other		Additional Information
	 Securities		Concerning Fund Shares;
			Dividends

19. Purchase, Redemption and		Additional Purchase and
	 Pricing of Securities		Redemption Information
	 Being Offered

20. Tax Status		Additional Information
			Concerning Taxes

21. Underwriters		Management of the Funds

22. Calculation of Performance		Additional Yield
			Information

23. Financial Statements		Financial Statements




LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST


   
The Prospectuses dated February 5, 1993 for the Prime Money Market Fund, Prime 
Value Money Market Fund, Government Obligations Money Market Fund, 100% 
Government Obligations Money Market Fund, Treasury Instruments Money Market 
Fund, Treasury Instruments Money Market Fund II, 100% Treasury Instruments 
Money Market Fund, Municipal Money Market Fund, Tax-Free Money Market Fund and 
California Municipal Money Market Fund are not included in this filing.
    
Part A (the Prospectus, dated February 5, 1993) and Part B (the Statement of 
Additional Information, also dated February 5, 1993 of Form N-1A are 
incorporated herein by reference to the Registrant's filing of definitive 
copies of the Prospectus and Statement of Additional Information pursuant to 
Rule 497(c).

<PAGE>
                                LEHMAN BROTHERS
                      SHORT DURATION U.S. GOVERNMENT FUND
                       An Investment Portfolio Offered By
                Lehman Brothers Institutional Funds Group Trust
 
   
    Lehman  Brothers  Institutional  Funds  Group  Trust  (the  "Trust")  is  an
open-end, management investment company. The shares described in this Prospectus
represent interests in a class of  shares ("Institutional Shares") of the  Short
Duration  U.S. Government Fund (the  "Fund"), a diversified investment portfolio
of the Trust.  Fund shares  may not be  purchased by  individuals directly,  but
institutional   investors  may  purchase  shares   for  accounts  maintained  by
individuals.
    
 
    The Fund's INVESTMENT OBJECTIVE is to provide a high level of current income
consistent with  minimal  fluctuation  of  net asset  value.  The  Fund  invests
primarily  in a portfolio consisting of short duration adjustable rate, floating
rate and  fixed  rate U.S.  government  and agency  securities,  and  repurchase
agreements collateralized by such obligations.
 
   
    LEHMAN  BROTHERS  INC. sponsors  the  Fund and  acts  as Distributor  of its
shares. LEHMAN  BROTHERS  GLOBAL ASSET  MANAGEMENT  INC. serves  as  the  Fund's
Investment Adviser.
    
 
    The  address of the Fund is One Exchange Place, Boston, Massachusetts 02109.
The Fund can be  contacted as follows: FOR  PURCHASE AND REDEMPTION ORDERS  ONLY
CALL  1-800-851-3134;  for  yield  information  call  1-800-238-2560;  for other
information call 1-800-368-5556.
 
   
    This Prospectus briefly sets forth  certain information about the Fund  that
investors  should  know before  investing. Investors  are  advised to  read this
Prospectus and retain it for future reference. Additional information about  the
Fund,  contained in  a Statement  of Additional  Information dated  February 21,
1994, as amended  or supplemented from  time to  time, has been  filed with  the
Securities  and Exchange Commission and is available to investors without charge
by calling the Fund's Distributor at 1-800-368-5556. The Statement of Additional
Information is incorporated in its entirety by reference into this Prospectus.
    
 
    SHARES OF THE  FUND ARE  NOT DEPOSITS OR  OBLIGATIONS OF,  OR GUARANTEED  OR
ENDORSED  BY, ANY BANK, AND SUCH SHARES ARE NOT FEDERALLY INSURED BY THE FEDERAL
DEPOSIT INSURANCE CORPORATION, THE FEDERAL RESERVE BOARD OR ANY OTHER GOVERNMENT
AGENCY. SHARES  OF THE  FUND  INVOLVE CERTAIN  INVESTMENT RISKS,  INCLUDING  THE
POSSIBLE LOSS OF PRINCIPAL.
 
                            ------------------------
 
THESE  SECURITIES  HAVE  NOT  BEEN APPROVED  OR  DISAPPROVED  BY  THE SECURITIES
    AND   EXCHANGE   COMMISSION   OR   ANY   STATE   SECURITIES   COMMISSION
       NOR  HAS  THE  SECURITIES  AND EXCHANGE  COMMISSION  OR  ANY STATE
           SECURITIES  COMMISSION   PASSED  UPON   THE  ACCURACY   OR
               ADEQUACY  OF  THIS PROSPECTUS.  ANY REPRESENTATION
                      TO THE CONTRARY IS A CRIMINAL OFFENSE.
 
                            ------------------------
 
                                LEHMAN BROTHERS
 
   
February 21, 1994
    
<PAGE>
                       BACKGROUND AND EXPENSE INFORMATION
 
   
    The  Fund currently  offers three  separate classes  of shares,  only one of
which,  Institutional  Shares,  is  offered  by  this  Prospectus.  Each   class
represents  an equal, PRO  RATA interest in  the Fund. Each  share accrues daily
dividends in the same manner, except that the shares of other classes bear  fees
allocable to services provided to the beneficial owners of such shares.
    
 
    The purpose of the following table is to assist an investor in understanding
the  various costs and expenses that an investor in the Fund would bear directly
or indirectly. For more complete descriptions of the various costs and expenses,
see "Management of the Fund" in this Prospectus and the Statement of  Additional
Information.
 
                                EXPENSE SUMMARY
 

                                              
 ANNUAL FUND OPERATING EXPENSES
  (as a percentage of average net assets)
     Advisory Fees (net of waivers)...........    .17%
     Rule 12b-1 fees..........................   none
     Other Expenses -- including
      Administration Fees.....................    .23
                                                 -----
     Total Fund Operating Expenses (after
      expense reimbursement)..................    .40
                                                 -----
                                                 -----

 
- ---------
 

[CAPTION]
 EXAMPLE
                                                          
 You  would pay the following  expenses on a $1,000
 investment, assuming (1)  a 5%  annual return  and
 (2) redemption at the end of each time period with
 respect to the following shares:
 
[CAPTION]
                                                      1 YEAR    3 YEARS
                                                      ------    -------
                                                          
                                                        $4        $13

 
THE  FOREGOING SHOULD NOT BE CONSIDERED  A REPRESENTATION OF ACTUAL EXPENSES AND
RATE OF RETURN, WHICH MAY BE GREATER OR LESSER THAN THOSE SHOWN.
 
   
    The Fund's Investment  Adviser has voluntarily  agreed to waive  its fee  or
reimburse  the Fund  to the extent  necessary to maintain  the Fund's annualized
expense ratio at .40%. The voluntary waiver or reimbursement will not be changed
unless shareholders are provided at least 60 days' advance notice. In  addition,
the  Administrator may waive a portion of its fee which will assist in achieving
this expense ratio. Absent waivers  or reimbursement of expenses, Advisory  Fees
with  respect to  Institutional Shares  would be  .30% annually,  Other Expenses
would be .25% annually and the Total  Fund Operating Expenses would be .60%,  of
the Fund's average daily net assets. The foregoing table has not been audited by
the Fund's independent accountants.
    
 
                       INVESTMENT OBJECTIVE AND POLICIES
 
    The  investment objective of the Fund is  to provide a high level of current
income consistent with minimal  fluctuation of net  asset value. Current  income
includes, in general, discount earned on U.S. Treasury bills and agency discount
notes,  interest earned on mortgage-related securities and other U.S. government
and agency  securities, and  short-term capital  gains. While  there can  be  no
assurance  that the  Fund will  be able to  maintain minimal  fluctuation of net
asset value or that it will achieve its investment objective, the Fund endeavors
to do so by following the investment policies described in this Prospectus.
 
                                       2
<PAGE>
   
    The Fund  pursues  its investment  objective  by investing  primarily  in  a
professionally  managed portfolio  of adjustable  rate, floating  rate and fixed
rate securities which are  issued or guaranteed as  to payment of principal  and
interest  by the U.S. government, its agencies or instrumentalities. As a mutual
fund with "U.S.  Government" in its  name, under normal  market conditions,  the
Fund must invest at least 65% of its portfolio in such instruments.
    
 
DURATION
 
   
    Under normal interest rate conditions, the Fund's average portfolio duration
will  be approximately the same as  a one-year U.S. Treasury Bill (approximately
one year). This means that the Fund's net asset value fluctuation is expected to
be similar to  the price  fluctuation of a  one-year Treasury  Bill. The  Fund's
average  portfolio duration is  not expected to  exceed that of  a two-year U.S.
Treasury Note (approximately 1.9  years). In computing  the average duration  of
its  portfolio,  the Fund  will estimate  the duration  of obligations  that are
subject to  prepayment or  redemption by  the issuer,  taking into  account  the
influence  of  interest  rates on  prepayments  and coupon  flows.  Maturity, in
contrast to duration, measures only  the time until final  payment is due on  an
investment;  it does not take into account the pattern of a security's cash flow
over time, including how cash flow is affected by prepayments and by changes  in
interest rates.
    
 
   
ACCEPTABLE INVESTMENTS
    
    The types of U.S. government securities in which the Fund may invest include
direct obligations of the U.S. Treasury, such as U.S. Treasury bills, notes, and
bonds,  as well as obligations of U.S. government agencies or instrumentalities.
The Fund may invest in U.S. government securities which are collateralized by or
represent interests in real estate  mortgages. The types of mortgage  securities
in which the Fund may invest include the following: (i) adjustable rate mortgage
securities; (ii) collateralized mortgage obligations; (iii) real estate mortgage
investment conduits; and (iv) other securities collateralized by or representing
interests  in  real  estate mortgages  whose  interest rates  reset  at periodic
intervals and are issued or guaranteed  by the U.S. government, its agencies  or
instrumentalities.
 
    The  Fund may also invest in mortgage-related securities which are issued by
private entities such as investment banking  firms and companies related to  the
construction industry. The privately issued mortgage-related securities in which
the  Fund  may  invest  include:  (i)  privately  issued  securities  which  are
collateralized by pools of mortgages in which each mortgage is guaranteed as  to
payment  of principal and interest  by an agency or  instrumentality of the U.S.
government; (ii) privately issued securities  which are collateralized by  pools
of  mortgages in which payment  of principal and interest  are guaranteed by the
issuer and such guarantee is  collateralized by U.S. government securities;  and
(iii)  other privately issued  securities in which the  proceeds of the issuance
are invested  in mortgage-backed  securities and  payment of  the principal  and
interest  are supported by  the credit of  any agency or  instrumentality of the
U.S. government.
 
    The  privately  issued  mortgage-related  securities  provide  for  periodic
payments  consisting of  both interest  and principal.  The interest  portion of
these payments  will be  distributed by  the  Fund as  income, and  the  capital
portion will be reinvested.
 
   
    U.S.  GOVERNMENT SECURITIES.   Securities issued  or guaranteed  by the U.S.
government  or  its   agencies  or  instrumentalities   include  U.S.   Treasury
securities,  which differ in  interest rates, maturities  and times of issuance.
Treasury bills have initial maturities of one year or less; Treasury notes  have
initial  maturities  of one  to  ten years;  and  Treasury Bonds  generally have
initial maturities  of  greater  than  ten years.  Some  obligations  issued  or
guaranteed  by  U.S.  government agencies  and  instrumentalities,  for example,
Government  National   Mortgage  Association   pass-through  certificates,   are
supported  by the full  faith and credit  of the U.S.  Treasury; others, such as
those issued  by the  Federal National  Mortgage Association,  by  discretionary
authority of the U.S. Government
    
 
                                       3
<PAGE>
   
to  purchase certain obligations  of the agency  or instrumentality; and others,
such as those  issued by  the Student Loan  Marketing Association,  only by  the
credit  of the agency or instrumentality.  These securities bear fixed, floating
or variable  rates of  interest. While  the U.S.  government provides  financial
support  to  such U.S.  Government-sponsored  agencies or  instrumentalities, no
assurance can be given that it will always  do so, since it is not so  obligated
by  law. The Fund will invest in such  securities only when it is satisfied that
the credit risk with respect to the issuer is minimal.
    
 
    ADJUSTABLE  RATE  MORTGAGE  SECURITIES  ("ARMS").    ARMS  are  pass-through
mortgage  securities with adjustable rather than  fixed interest rates. The ARMS
in which the Fund invests are issued by Government National Mortgage Association
("GNMA"), Federal National Mortgage Association  ("FNMA") and Federal Home  Loan
Corporation  ("FHLMC") and are  actively traded. The  underlying mortgages which
collateralize ARMS issued by  GNMA are fully guaranteed  by the Federal  Housing
Administration   ("FHA")   or  Veterans   Administration  ("VA"),   while  those
collateralizing  ARMS  issued  by  FHLMC  or  FNMA  are  typically  conventional
residential  mortgages  conforming  to  strict  underwriting  size  and maturity
constraints.
 
    Unlike conventional bonds, ARMS pay back principal over the life of the ARMS
rather than at maturity.  Thus, a holder  of the ARMS, such  as the Fund,  would
receive  monthly scheduled  payments of principal  and interest  and may receive
unscheduled  principal  payments   representing  payments   on  the   underlying
mortgages.  At the time that a holder of the ARMS reinvests the payments and any
unscheduled prepayments of principal that it receives, the holder may receive  a
rate of interest paid on the existing ARMS. As a consequence, ARMS may be a less
effective  means of  "locking in" long-term  interest rates than  other types of
U.S. government securities.
 
    Not unlike other U.S. government securities,  the market value of ARMS  will
generally vary inversely with changes in market interest rates. Thus, the market
value  of ARMS generally  declines when interest rates  rise and generally rises
when interest rates decline.
 
    While ARMS generally entail less risk of a decline during periods of rapidly
rising rates, ARMS may  also have less potential  for capital appreciation  than
other   similar  investments  (e.g.,  investments  with  comparable  maturities)
because, as interest rates decline, the likelihood increases that mortgages will
be  prepaid.  Furthermore,  if  ARMS  are  purchased  at  a  premium,   mortgage
foreclosures  and unscheduled  principal payments may  result in some  loss of a
holder's principal investment to the extent of the premium paid. Conversely,  if
ARMS  are purchased at a discount, both  a scheduled payment of principal and an
unscheduled prepayment of principal would increase current and total returns and
would accelerate the  recognition of income,  which would be  taxed as  ordinary
income when distributed to shareholders.
 
    COLLATERALIZED  MORTGAGE  OBLIGATIONS ("CMOS").   CMOs  are bonds  issued by
single-purpose,  stand-alone  finance  subsidiaries   or  trusts  of   financial
institutions, government agencies, investment banks, or companies related to the
construction industry. CMOs purchased by the Fund may be:
 
    (a)    collateralized  by  pools  of mortgages  in  which  each  mortgage is
       guaranteed as  to payment  of  principal and  interest  by an  agency  or
       instrumentality of the U.S. government;
 
    (b)  collateralized by pools of mortgages  in which payment of principal and
       interest is guaranteed by the issuer and such guarantee is collateralized
       by U.S. government securities; or
 
    (c)   securities in  which the  proceeds  of the  issuance are  invested  in
       mortgage  securities  and  payment  of  the  principal  and  interest are
       supported by  the credit  of an  agency or  instrumentality of  the  U.S.
       government.
 
                                       4
<PAGE>
    All  CMOs  purchased  by  the  Fund are  investment  grade,  as  rated  by a
nationally recognized statistical rating organization.
 
    REAL ESTATE MORTGAGE INVESTMENT CONDUITS  ("REMICS").  REMICs are  offerings
of multiple class real estate mortgage-backed securities which qualify and elect
treatment  as such  under provisions  of the  Internal Revenue  Code. Issuers of
REMICs may  take  several forms,  such  as trusts,  partnerships,  corporations,
associations or a segregated pool of mortgages. Once REMIC status is elected and
obtained,  the entity is not subject to federal income taxation. Instead, income
is passed through  the entity and  is taxed to  the person or  persons who  hold
interests  in the REMIC. A REMIC interest must consist of one or more classes of
"regular interests," some of which may offer adjustable rates (the type in which
the Fund primarily  invests), and  a single  class of  "residual interests".  To
qualify  as a REMIC,  substantially all of the  assets of the  entity must be in
assets directly or indirectly secured principally by real property.
 
   
    STRIPPED MORTGAGE-BACKED SECURITIES ("SMBS").  The Fund may invest up to 10%
of  its  total  assets  in  SMBS,  which  are  derivative  multiclass   mortgage
securities.  The Fund may only  invest in SMBS issued  or guaranteed by the U.S.
government, its agencies or instrumentalities. SMBS are usually structured  with
two  classes that  receive different proportions  of the  interest and principal
distributions from a  pool of  mortgage assets,  which may  consist of  mortgage
loans  or guaranteed mortgage  pass-through certificates. A  common type of SMBS
will have one class receiving all or a portion of the interest from the mortgage
assets, while the other  class will receive all  of the principal. Moreover,  in
some  instances, one  class will receive  some of  the interest and  most of the
principal while  the other  class will  receive  most of  the interest  and  the
remainder of the principal. If the underlying mortgage assets experience greater
than  anticipated prepayments of principal, there may no longer be interest paid
on some of the underlying mortgage loans and the Fund, as a result, may fail  to
fully recoup its initial investment in these securities. Although the market for
such  securities  is  increasingly  liquid,  certain  SMBS  may  not  be readily
marketable and will be considered illiquid for purposes of the Fund's limitation
on investments in illiquid securities. The market value of the class  consisting
entirely  of principal payments  generally is unusually  sensitive to changes in
interest rates. The market  value of the class  consisting entirely of  interest
payments  is extremely sensitive not only to  changes in interest rates but also
to the  rate  of  principal  payments, including  prepayments,  on  the  related
underlying  mortgage assets. The yields on a  class of SMBS that receives all or
most of the interest from mortgage  assets are generally higher than  prevailing
market  yields  on  other  mortgage-backed securities  because  their  cash flow
patterns are  more  variable  and there  is  a  greater risk  that  the  initial
investment  will  not be  fully recouped.  The Investment  Adviser will  seek to
manage these risks (and  potential benefits) by investing  in a variety of  such
securities and by using certain hedging techniques.
    
 
OTHER INVESTMENTS AND PRACTICES
 
   
    RESETS.   The interest rates paid on the  ARMS, CMOs and REMICs in which the
Fund invests generally are readjusted or reset at intervals of one year or  less
to  an increment over some predetermined interest rate index. There are two main
categories of indices: those based on U.S. Treasury securities and those derived
from a calculated measure, such as a cost of funds index or a moving average  of
mortgage  rates. Commonly  utilized indices  include the  one-year and five-year
Constant Maturity Treasury (CMT) rates, the three-month Treasury Bill rate,  the
180-day  Treasury  Bill  rate, rates  on  longer term  Treasury  securities, the
National Median  Cost  of Funds  (COFI),  the one-month  or  three-month  London
Interbank Offered Rate (LIBOR), the prime rate of a specific bank, or commercial
paper rates. Some indices, such as the one-year CMT rate, closely mirror changes
in market interest rate levels. Others tend to lag changes in market rate levels
and tend to be somewhat less volatile.
    
 
    CAPS  AND FLOORS.   The underlying  mortgages which  collateralize the ARMS,
CMOs and REMICs in which the Fund  invests may have caps and floors which  limit
the maximum amount by which the loan rate to the
 
                                       5
<PAGE>
residential borrower may change up or down: (1) per reset or adjustment interval
and  (2) over  the life  of the loan.  Some residential  mortgage loans restrict
periodic adjustments by limiting changes in the borrower's monthly principal and
interest payments rather than limiting interest rate changes. These payment caps
may result in negative amortization.
 
    The value of mortgage securities in  which the Fund invests may be  affected
if market interest rates rise or fall faster and farther than the allowable caps
or floors on the underlying residential mortgage loans. An example of the effect
of  caps and floors on a residential mortgage loan may be found in the Statement
of Additional Information. Additionally, even  though the interest rates on  the
underlying  residential mortgages  are adjustable,  amortization and prepayments
may occur, thereby causing the  effective maturities of the mortgage  securities
in  which  the Fund  invests to  be shorter  than the  maturities stated  in the
underlying mortgages.
 
    REPURCHASE AGREEMENTS.   Repurchase  agreements  are arrangements  in  which
banks,  broker/dealers,  and other  recognized  financial institutions  sell U.S
government securities or other securities to the  Fund and agree at the time  of
sale to repurchase them at a mutually agreed upon time and price within one year
from  the date of acquisition.  To the extent that  the original seller does not
repurchase the securities from  the Fund, the Fund  could receive less than  the
repurchase price on any sale of such securities.
 
    REVERSE  REPURCHASE AGREEMENTS.   The  Fund may  borrow funds  for temporary
purposes by entering into reverse  repurchase agreements in accordance with  the
investment  restrictions described below. Pursuant  to such agreements, the Fund
would  sell  portfolio  securities  to  financial  institutions  and  agree   to
repurchase  them  at an  agreed upon  date  and price.  The Fund  would consider
entering  into  reverse  repurchase   agreements  to  avoid  otherwise   selling
securities  during unfavorable market  conditions. Reverse repurchase agreements
involve the risk that the market value  of the portfolio securities sold by  the
Fund  may decline  below the price  of the  securities the Fund  is obligated to
repurchase.
 
    DOLLAR ROLL TRANSACTIONS.  In order to enhance portfolio returns and  manage
prepayment  risks, the Fund may engage  in dollar roll transactions with respect
to mortgage  securities  issued  by GNMA,  FNMA  and  FHLMC. In  a  dollar  roll
transaction, the Fund sells a mortgage security to a financial institution, such
as   a  bank  or  broker/dealer,  and  simultaneously  agrees  to  repurchase  a
substantially similar  (same  type,  coupon, and  maturity)  security  from  the
institution  at a later  date at an  agreed upon price.  The mortgage securities
that are  repurchased  will bear  the  same interest  rate  as those  sold,  but
generally  will be collateralized by different pools of mortgages with different
prepayment histories. During  the period  between the sale  and repurchase,  the
Fund  will not  be entitled  to receive interest  and principal  payments on the
securities  sold.  Proceeds  of  the   sale  will  be  invested  in   short-term
instruments, and the income from these investments, together with any additional
fee income received on the sale, will generate income for the Fund exceeding the
yield. When the Fund enters into a dollar roll transaction, liquid assets of the
Fund,  in a dollar amount  sufficient to make payment  for the obligations to be
repurchased, are segregated at the trade date. These assets are marked to market
daily and are maintained until the transaction is settled.
 
    HEDGING TRANSACTIONS.   To  assist  in reducing  fluctuations in  net  asset
value,  the Fund may  from time to  time engage in  certain hedging transactions
involving exchange  traded  options or  futures  and  the short  sale  of  these
securities  and other acceptable investments of the Fund to the extent that such
transactions are  in conformity  with applicable  laws, rules  and  regulations.
Although the use of hedging strategies is intended to reduce the Fund's exposure
to interest rate volatility, it may cause some fluctuation in net asset value.
 
   
    ILLIQUID  SECURITIES.  The Fund  will not knowingly invest  more than 15% of
the value  of  its total  net  assets  in illiquid  securities,  including  time
deposits  and repurchase  agreements having  maturities longer  than seven days.
Securities that have readily available market quotations are not deemed illiquid
for purposes  of  this limitation  (irrespective  of any  legal  or  contractual
restrictions   on  resale).  The  Fund  may  invest  in  commercial  obligations
    
 
                                       6
<PAGE>
issued  in  reliance  on  the  so-called  "private  placement"  exemption   from
registration  afforded by Section 4(2) of the Securities Act of 1933, as amended
("Section 4(2)  paper"). The  Fund may  also purchase  securities that  are  not
registered  under the Securities Act of 1933,  as amended, but which can be sold
to qualified institutional buyers  in accordance with Rule  144A under that  Act
("Rule  144A securities").  Section 4(2) paper  is restricted  as to disposition
under the  federal  securities laws,  and  generally is  sold  to  institutional
investors  such as  the Fund who  agree that  they are purchasing  the paper for
investment and  not  with a  view  to public  distribution.  Any resale  by  the
purchaser  must  be in  an exempt  transaction. Section  4(2) paper  normally is
resold to  other institutional  investors  like the  Fund  through or  with  the
assistance  of the issuer or investment dealers who make a market in the Section
4(2) paper, thus  providing liquidity.  Rule 144A securities  generally must  be
sold  to other  qualified institutional  buyers. If  a particular  investment in
Section 4(2) paper or Rule 144A securities is not determined to be liquid,  that
investment  will be included within the 15% limitation on investment in illiquid
securities. The ability to sell Rule 144A securities to qualified  institutional
buyers is a recent development and it is not possible to predict how this market
will mature.
 
    WHEN-ISSUED  SECURITIES.    The  Fund  may  also  purchase  securities  on a
"when-issued"  basis.  When-issued  securities  are  securities  purchased   for
delivery beyond the normal settlement date at a stated price and yield. The Fund
will  generally not pay  for such securities  or start earning  interest on them
until they  are  received.  Securities  purchased on  a  when-issued  basis  are
recorded  as an asset and are subject to  changes in value based upon changes in
the general  level of  interest  rates. The  Fund  expects that  commitments  to
purchase  when-issued securities will not  exceed 25% of the  value of its total
assets absent unusual market  conditions. The Fund does  not intend to  purchase
when-issued  securities for speculative purposes but  only in furtherance of its
investment objective.
 
    LENDING OF PORTFOLIO SECURITIES.   In order  to generate additional  income,
the Fund may lend portfolio securities up to one-third of the value of its total
assets to broker/dealers, banks, or other institutional borrowers of securities.
The  Fund will only enter into  loan arrangements with broker/dealers, banks, or
other institutions which the Investment Adviser has determined are  creditworthy
under  guidelines established by  the Fund's Board of  Trustees and will receive
collateral in the form of cash or  U.S. government securities equal to at  least
100% of the value of the securities loaned.
 
   
    TEMPORARY  DEFENSIVE  POSITIONS.   When  maintaining  a  temporary defensive
position, the Fund may invest its assets, without limit, in commercial paper and
other short-term  corporate obligations.  The  Fund's investment  in  commercial
paper  or corporate obligations will  be limited to securities  with one year or
less remaining to maturity and  rated A-1 by S&P  Corporation or P-1 by  Moody's
Investor Service, Inc.
    
 
   
    PORTFOLIO  TURNOVER.  Although  the Fund does  not intend to  invest for the
purpose of seeking short-term profits, securities in its portfolio will be  sold
whenever  the Fund's Investment Adviser  believes it is appropriate  to do so in
light of the Fund's investment objective, without regard to the length of time a
particular security may have been held.
    
 
INVESTMENT LIMITATIONS
    The Fund's investment  objective and  the policies described  above are  not
fundamental  and may be changed by the  Trust's Board of Trustees without a vote
of shareholders. If there is a change in the investment objective,  shareholders
should  consider whether the Fund remains  an appropriate investment in light of
their  then  current  financial  position  and  needs.  The  Fund's   investment
limitations  summarized below may not be changed without the affirmative vote of
the holders of a majority of its  outstanding shares. There can be no  assurance
that  the Fund will  achieve its investment  objective. (A complete  list of the
investment limitations that cannot be changed without a vote of shareholders  is
contained in the Statement of Additional Information under "Investment Objective
and Policies.")
 
                                       7
<PAGE>
The Fund may not:
 
        1.    Borrow  money, except  that  the  Fund may  (i)  borrow  money for
    temporary or emergency purposes (not for leveraging or investment) and  (ii)
    engage  in reverse repurchase agreements or dollar roll transactions for any
    purpose; provided that (i) and (ii)  in combination do not exceed  one-third
    of the value of the Fund's total assets (including the amount borrowed) less
    liabilities (other than borrowings).
 
        2.   Purchase any securities which would  cause 25% or more of the value
    of its total assets at the time of purchase to be invested in the securities
    of issuers  conducting  their  principal business  activities  in  the  same
    industry,  provided that there is no  limitation with respect to investments
    in U.S. government obligations and obligations of domestic banks.
 
   
                  PURCHASE, REDEMPTION AND EXCHANGE OF SHARES
    
 
PURCHASE PROCEDURES
   
    Shares of the Fund  are sold at the  net asset value per  share of the  Fund
next  determined  after receipt  of  a purchase  order  by Lehman  Brothers Inc.
("Lehman Brothers"), a  Distributor of  the Fund's shares.  Purchase orders  for
shares  are accepted only on days on  which both Lehman Brothers and the Federal
Reserve Bank of Boston are open for  business and must be transmitted to  Lehman
Brothers  by telephone at 1-800-851-3134 before 4:00 p.m., Eastern time. Payment
in federal funds immediately available to  the Custodian, Boston Safe Deposit  &
Trust  Company, must  be received  before 3:00  p.m., Eastern  time on  the next
business day following  the order.  The Fund may  in its  discretion reject  any
order  for shares.  (Payment for  orders which are  not received  or accepted by
Lehman  Brothers  will  be  returned   after  prompt  inquiry  to  the   sending
institution.)  Any  person  entitled  to  receive  compensation  for  selling or
servicing shares of the Fund may  receive different compensation for selling  or
servicing one class of shares over another class.
    
 
    The minimum aggregate initial investment by an institution in the investment
portfolios  that comprise the  Trust is $1  million (with not  less than $25,000
invested in  any  one  investment  portfolio offered  by  the  Trust);  however,
broker-dealers  and other institutional  investors may set  a higher minimum for
their customers. To reach the  minimum Trust-wide initial investment,  purchases
of  shares may be  aggregated over a period  of six months.  There is no minimum
subsequent investment.
 
    SUBACCOUNTING SERVICES.  Institutions are  encouraged to open single  master
accounts.  However, certain  institutions may wish  to use  the transfer agent's
subaccounting system to minimize their internal recordkeeping requirements.  The
transfer  agent  charges a  fee  based on  the  level of  subaccounting services
rendered. Institutions holding Fund shares in a fiduciary, agency, custodial  or
similar  capacity may charge or pass through subaccounting fees as part of or in
addition to normal trust or agency account  fees. They may also charge fees  for
other  services provided which may  be related to the  ownership of Fund shares.
This Prospectus should, therefore, be  read together with any agreement  between
the  customer and the institution with regard to the services provided, the fees
charged for those services and any restrictions and limitations imposed.
 
REDEMPTION PROCEDURES
 
    Redemption orders must be transmitted to Lehman Brothers by telephone in the
manner described herein. Shares  are redeemed at the  net asset value per  share
next  determined after  Lehman Brothers'  receipt of  the redemption  order. The
proceeds paid to  a shareholder upon  redemption may  be more or  less than  the
amount  invested  depending  upon a  share's  net  asset value  at  the  time of
redemption.
 
    Subject to the foregoing, payment for redeemed shares for which a redemption
order is received by Lehman  Brothers before 4:00 p.m.,  Eastern time, on a  day
that  both Lehman Brothers and  the Federal Reserve Bank  of Boston are open for
business is normally made in federal funds wired to the redeeming shareholder on
 
                                       8
<PAGE>
the next business  day following  the redemption  order. The  Fund reserves  the
right  to  wire  redemption  proceeds  within  seven  days  after  receiving the
redemption order  if, in  the judgment  of the  Investment Adviser,  an  earlier
payment could adversely affect the Fund.
 
   
    The  Fund shall have the right to redeem involuntarily shares in any account
at their net asset value if the value of the account is less than $10,000  after
60  days' prior written notice to the  shareholder. Any such redemption shall be
effected at the net asset value  per share next determined after the  redemption
order  is entered.  If during  the 60 day  period the  shareholder increases the
value of its account to $10,000 or more, no such redemption shall take place. In
addition, the  Fund may  redeem shares  involuntarily or  suspend the  right  of
redemption  as permitted  under the Investment  Company Act of  1940, as amended
(the "1940  Act"),  or under  certain  special circumstances  described  in  the
Statement  of Additional  Information under "Additional  Purchase and Redemption
Information."
    
 
    The ability to give telephone instructions for the redemption (and  purchase
or  exchange) of shares is automatically established on a shareholder's account.
However, the Fund reserves the right to refuse a redemption order transmitted by
telephone if it is  believed advisable to do  so. Procedures for redeeming  fund
shares  by telephone may  be modified or terminated  at any time  by the Fund or
Lehman Brothers. In addition, neither the Fund, Lehman Brothers nor the Transfer
Agent will be responsible for the authenticity of telephone instructions for the
purchase, redemption or exchange of shares where the instructions are reasonably
believed to be genuine.  Accordingly, the investor will  bear the risk of  loss.
The  Fund will  attempt to confirm  that telephone instructions  are genuine and
will use such procedures as  are considered reasonable, including the  recording
of  telephone instructions. To the extent that  the Fund fails to use reasonable
procedures to  verify  the genuineness  of  telephone instructions,  it  or  its
service  providers  may  be  liable  for  such  instructions  that  prove  to be
fraudulent or unauthorized.
 
    To allow  the Fund's  Investment  Adviser to  manage the  Fund  effectively,
investors  are strongly urged to initiate all investments or redemptions of Fund
shares as early in the  day as possible and to  notify Lehman Brothers at  least
one day in advance of transactions in excess of $5 million.
 
   
EXCHANGE PROCEDURES
    
   
    The  Exchange Privilege enables a shareholder to exchange shares of the Fund
without charge  for shares  of other  funds of  the Trust  which have  different
investment  objectives  that may  be  of interest  to  shareholders. To  use the
Exchange Privilege, exchange instructions  must be given  to Lehman Brothers  by
telephone. See "Redemption Procedures." In exchanging shares, a shareholder must
meet the minimum initial investment requirement of the other fund and the shares
involved  must be legally available for sale  in the state where the shareholder
resides. Before any exchange, the shareholder must also obtain and should review
a copy of  the prospectus of  the fund into  which the exchange  is being  made.
Prospectuses  may be  obtained from  Lehman Brothers  by calling 1-800-368-5556.
Shares will be exchanged at the net asset value next determined after receipt of
an exchange request  in proper  form. The  exchange of  shares of  one fund  for
shares  of another fund is treated for Federal  Income Tax purposes as a sale of
the shares given in  exchange by the shareholder  and, therefore, a  shareholder
may  realize a taxable gain  or loss. The Fund reserves  the right to reject any
exchange request in whole or in part. The Exchange Privilege may be modified  or
terminated at any time upon notice to shareholders.
    
 
VALUATION OF SHARES -- NET ASSET VALUE
 
    The  Fund's net asset value  per share for purposes  of pricing purchase and
redemption orders is  determined by the  Fund's Administrator as  of 4:00  p.m.,
Eastern  time, on each  weekday, with the  exception of those  holidays on which
either the New  York Stock Exchange  or the  Federal Reserve Bank  of Boston  is
closed. Currently, one
 
                                       9
<PAGE>
or  both of  these institutions  are closed  on the  customary national business
holidays of New Year's Day, Martin  Luther King, Jr. Day, Presidents' Day,  Good
Friday,  Memorial  Day  (observed),  Independence  Day  (observed),  Labor  Day,
Columbus Day, Veterans Day,  Thanksgiving Day and Christmas  Day. The net  asset
value  per  share  of Fund  shares  is calculated  by  adding the  value  of all
securities and other assets of  the Fund, subtracting liabilities, and  dividing
the result by the total number of the Fund's outstanding shares (irrespective of
class  or  sub-class). The  Fund's net  asset  value per  share for  purposes of
pricing purchase and redemption  orders is determined  independently of the  net
asset value of the Trust's other investment portfolios.
 
OTHER MATTERS
 
    Fund  shares are sold and redeemed without charge by the Fund. Institutional
investors purchasing  or holding  Fund shares  for their  customer accounts  may
charge  customers  fees  for  cash management  and  other  services  provided in
connection with their accounts. A customer should, therefore, consider the terms
of its account with an institution before purchasing Fund shares. An institution
purchasing or redeeming Fund  shares on behalf of  its customers is  responsible
for  transmitting  orders to  Lehman Brothers  in  accordance with  its customer
agreements.
 
                                   DIVIDENDS
 
    Shareholders of the Fund are entitled to dividends and distributions arising
only from  the  net investment  income  and capital  gains,  if any,  earned  on
investments held by the Fund. The Fund's net investment income is declared daily
as  a dividend to shares held  of record at the close  of business on the day of
declaration. Shares begin accruing dividends on the next business day  following
receipt  of  the purchase  order  and continue  to  accrue dividends  up  to and
including the day  that such  shares are  redeemed. Dividends  are paid  monthly
within  five business days  after the end  of the month  or within five business
days after a redemption of all of a shareholder's shares of a particular  class.
Net capital gains distributions, if any, will be made annually.
 
   
    Dividends  are determined in the same manner and are paid in the same amount
for each  Fund share,  except that  shares of  the other  classes bear  all  the
expense  of Rule 12b-1 distribution  fees paid. As a  result, at any given time,
the net yield on shares of the other classes will be lower than the net yield on
Institutional Shares.
    
 
    Institutional shareholders may elect to  have their dividends reinvested  in
additional  full and fractional shares of the  same class of shares with respect
to which such dividends are  declared at the net asset  value of such shares  on
the  payment  date.  Reinvested  dividends receive  the  same  tax  treatment as
dividends paid in cash. Such election,  or any revocation thereof, must be  made
in  writing to  The Shareholder Services  Group, Inc. ("TSSG"),  a subsidiary of
First Data  Corporation  and  the  Fund's transfer  agent,  at  P.O.  Box  9690,
Providence, Rhode Island 02940-9690, and will become effective after its receipt
by TSSG, with respect to dividends paid.
 
    TSSG,  as transfer agent, will send  each Fund shareholder or its authorized
representative an  annual  statement designating  the  amount, if  any,  of  any
dividends  and  distributions  made  during  each  year  and  their  federal tax
qualification.
 
                                       10
<PAGE>
                                     TAXES
 
    The  Fund intends to  qualify each year as  a "regulated investment company"
under the Internal Revenue  Code of 1986, as  amended (the "Code"). A  regulated
investment  company is exempt from federal  income tax on amounts distributed to
its shareholders.
 
   
    Qualification as a regulated investment company under the Code for a taxable
year requires, among other things, that the Fund distribute to its  shareholders
at least 90% of its investment company taxable income for such year. In general,
the  Fund's  investment  company  taxable  income  will  be  its  taxable income
(including dividends and short-term  capital gains, if  any) subject to  certain
adjustments  and excluding the excess of any net long-term capital gains for the
taxable year over the net  short-term capital loss, if  any, for such year.  The
Fund  intends to distribute substantially all  of its investment company taxable
income each year. Such distributions will be taxable as ordinary income to  Fund
shareholders  who are  not currently exempt  from federal  income taxes, whether
such income is  received in cash  or reinvested in  additional shares.  (Federal
income  taxes for  distributions to  an IRA or  a qualified  retirement plan are
deferred  under  the  Code.)  It  is   anticipated  that  none  of  the   Fund's
distributions  will  be  eligible  for  the  dividends  received  deduction  for
corporations.
    
 
    Dividends declared in October, November or  December of any year payable  to
shareholders of record on a specified date in such months will be deemed to have
been  received by the shareholders  and paid by the Fund  on December 31 of such
year in  the  event such  dividends  are actually  paid  during January  of  the
following year. Shareholders will be advised at least annually as to the federal
income tax status of distributions made to them each year.
 
    The  foregoing discussion is only  a brief summary of  some of the important
federal tax considerations generally affecting the Fund and its shareholders. As
noted above, IRAs receive special tax treatment. No attempt is made to present a
detailed explanation of the federal, state or local income tax treatment of  the
Fund  or its shareholders, and  this discussion is not  intended as a substitute
for careful tax planning.  Accordingly, potential investors  in the Fund  should
consult their tax advisors with specific reference to their own tax situation.
 
                             MANAGEMENT OF THE FUND
 
    The  business and affairs of the Fund are managed under the direction of the
Trust's Board  of  Trustees. The  Trustees  approve all  significant  agreements
between  the Trust  and the  persons or companies  that furnish  services to the
Fund,  including   agreements  with   its  Distributors,   Investment   Adviser,
Administrator,  Custodian and Transfer  Agent. The day-to-day  operations of the
Fund are  delegated to  the  Fund's Investment  Adviser and  Administrator.  One
Trustee and all of the Trust's officers are affiliated with Lehman Brothers, The
Boston  Company  Advisors, Inc.  or one  of their  affiliates. The  Statement of
Additional  Information  relating  to  the  Fund  contains  general   background
information regarding each Trustee and executive officer of the Trust.
 
INVESTMENT ADVISER--LEHMAN BROTHERS GLOBAL ASSET MANAGEMENT INC.
 
    Lehman  Brothers Global Asset Management Inc.  ("LBGAM"), located at 3 World
Financial Center, New  York, New  York 10285,  serves as  the Fund's  Investment
Adviser.  LBGAM is  a wholly owned  subsidiary of Lehman  Brothers Holdings Inc.
("Holdings"). All of the issued  and outstanding common stock (representing  92%
of  the voting stock)  of Holdings is  held by American  Express Company. LBGAM,
together with other  Lehman Brothers investment  advisory affiliates, serves  as
investment  adviser to investment companies and  private accounts and has assets
under management in excess of $13 billion.
 
    As Investment Adviser  to the Fund,  LBGAM manages the  Fund's portfolio  in
accordance   with  its  investment  objective  and  policies,  makes  investment
decisions   for   the    Fund,   places    orders   to    purchase   and    sell
 
                                       11
<PAGE>
   
securities  and employs professional portfolio  managers and securities analysts
who provide research services to the Fund. For its services LBGAM is entitled to
a monthly fee payable by the Fund at the annual rate of .30% of the value of the
Fund's average daily net assets.
    
 
    Kirk D. Hartman,  a Managing  Director of  LBGAM, has  been associated  with
Lehman  Brothers  in the  Mortgage  Department since  1987.  Mr. Hartman  is the
portfolio manager primarily responsible  for managing the day-to-day  operations
of  the Fund, including the making of investment selections. Mr. Hartman will be
assisted by Andrew  J. Stenwall,  a Vice President  of LBGAM.  Mr. Hartman  will
manage the Fund as of commencement of operations.
 
ADMINISTRATOR--THE BOSTON COMPANY ADVISORS, INC.
 
   
    The  Boston  Company  Advisors,  Inc. ("Boston  Advisors"),  located  at One
Exchange Place, Boston, Massachusetts 02109, serves as the Fund's Administrator.
Boston Advisors is a wholly owned subsidiary of The Boston Company, Inc.,  which
is in turn a wholly owned subsidiary of Boston Group Holdings, Inc. ("BGH"). BGH
is  a  wholly owned  subsidiary of  Mellon  Bank Corporation.  As Administrator,
Boston Advisors  calculates  the  net  asset value  of  the  Fund's  shares  and
generally  assists in all aspects of the Fund's administration and operation. As
compensation for its services as Administrator, Boston Advisors is entitled to a
monthly fee at the annual rate of .10% of the value of the Fund's average  daily
net assets.
    
 
DISTRIBUTORS AND PLAN OF DISTRIBUTION
 
    Lehman  Brothers, located  at 3 World  Financial Center, New  York, New York
10285, is a Distributor of the Fund. Lehman Brothers, a wholly owned  subsidiary
of  Holdings, is one of the leading  full-line investment firms serving the U.S.
and foreign securities and commodities markets. American Express Company and its
subsidiaries, other  than  Lehman  Brothers,  are  principally  engaged  in  the
businesses   of   providing   travel-related   services,   investment  services,
information services, international banking services and investors'  diversified
financial  services. Funds Distributor Inc., a wholly owned subsidiary of Lehman
Brothers located at One Exchange Place, Boston, Massachusetts 02109, also serves
as a distributor of the Fund.
 
   
    The Trust has adopted a Plan  of Distribution with respect to  Institutional
Shares  of the  Fund pursuant  to Rule  12b-1 under  the 1940  Act. The  Plan of
Distribution does not provide for the payment by the Fund of any Rule 12b-1 fees
for distribution or shareholder services  for Institutional Shares but  provides
that  Lehman  Brothers  may  make  payments to  assist  in  the  distribution of
Institutional Shares out of the other fees received by it or its affiliates from
the Fund, its past profits or any other sources available to it.
    
 
EXPENSES
 
   
    The Fund bears  all its  own expenses.  The Fund's  expenses include  taxes,
interest,  fees and salaries  of the Trust's  trustees and officers  who are not
directors, officers or employees of  the Fund's service contractors,  Securities
and  Exchange  Commission fees,  state securities  qualification fees,  costs of
preparing and printing prospectuses for regulatory purposes and for distribution
to shareholders, advisory  and administration  fees, charges  of the  Custodian,
Transfer  Agent  and  dividend  disbursing  agent,  certain  insurance premiums,
outside  auditing  and  legal  expenses,   costs  of  shareholder  reports   and
shareholder  meetings and  any extraordinary  expenses. The  Fund also  pays for
brokerage fees and commissions (if any) in connection with the purchase and sale
of portfolio securities. In order to maintain a competitive expense ratio, LBGAM
has agreed voluntarily to waive its fee or  to reimburse the Fund if and to  the
extent that the Fund's total operating expenses exceed .40% of average daily net
assets.  This  voluntary waiver  and reimbursement  will  not be  changed unless
shareholders are provided  at least 60  days' advance notice.  In addition,  the
Investment  Adviser has agreed to  reimburse the Fund to  the extent required by
applicable state law for certain expenses that are described in the Statement of
Additional Information relating to the Fund.
    
 
                                       12
<PAGE>
                            PERFORMANCE INFORMATION
 
   
    From time to  time, in  advertisements or  in reports  to shareholders,  the
"total  return," "yields" and "effective yields" for shares may be quoted. Total
return and yield quotations  are computed separately for  each class of  shares.
"Total  return" for a particular  class of shares represents  the change, over a
specified period of  time, in the  value of  an investment in  the shares  after
reinvesting  all  income and  capital gain  distributions.  It is  calculated by
dividing that change by the initial investment and is expressed as a percentage.
The "yield" quoted in advertisements for a particular class of shares refers  to
the  income generated by  an investment in  such shares over  a specified period
(such as a 30-day period) identified  in the advertisement. This income is  then
"annualized;"  that is, the amount of  income generated by the investment during
that period  is assumed  to be  generated each  such period  over a  52-week  or
one-year  period and is shown as a  percentage of the investment. The "effective
yield" is calculated  similarly but, when  annualized, the income  earned by  an
investment  in a  particular class is  assumed to be  reinvested. The "effective
yield" will  be slightly  higher than  the "yield"  because of  the  compounding
effect of this assumed reinvestment.
    
 
   
    Distribution   rates  may  also  be  quoted  for  the  Fund.  Quotations  of
distribution rates are calculated by annualizing the most recent distribution of
net investment income  for a  monthly, quarterly  or other  relevant period  and
dividing  this amount by the ending net asset value for the period for which the
distribution rates are being calculated.
    
 
   
    The Fund's performance may  be compared to that  of other mutual funds  with
similar  objectives, to stock or other relevant indices, or to rankings prepared
by independent services or other financial or industry publications that monitor
the performance of mutual funds. For example, such data are reported in national
financial publications such as MORNINGSTAR, INC., BARRON'S, IBC/DONOGHUE'S  INC.
BOND  FUND  REPORT, THE  WALL STREET  JOURNAL  and THE  NEW YORK  TIMES, reports
prepared by Lipper  Analytical Services,  Inc. and  publications of  a local  or
regional  nature.  The Fund's  Lipper  ranking in  the  "Short (1-5  Years) U.S.
Government Funds"  or "General  U.S. Government  Funds" categories  may also  be
quoted from time to time in advertising and sales literature.
    
 
   
    THE  FUND'S TOTAL RETURN AND  YIELD FIGURES FOR A  CLASS OF SHARES REPRESENT
PAST PERFORMANCE, WILL FLUCTUATE AND SHOULD NOT BE CONSIDERED AS  REPRESENTATIVE
OF FUTURE RESULTS.  The performance of any investment is generally a function of
portfolio quality and maturity, type of investment and operating expenses. Since
the  shares  of  other  classes  bear  all  service  fees  for  distribution  or
shareholder services,  the total  return and  net yield  of such  shares can  be
expected  at any given time to  be lower than the total  return and net yield of
Institutional Shares. Any  fees charged by  institutional investors directly  to
their  customers in connection with investments in Fund shares are not reflected
in the Fund's  expenses, total  return or yields;  and, such  fees, if  charged,
would  reduce the actual return received  by customers on their investments. The
methods used to compute the Fund's total return and yields are described in more
detail  in  the  Statement  of   Additional  Information.  Investors  may   call
1-800-238-2560  (Institutional Shares  Code: 013) to  obtain current performance
information.
    
 
                             DESCRIPTION OF SHARES
 
   
    The Trust  is a  Massachusetts business  trust established  on November  25,
1992. The Trust's Declaration of Trust authorizes the Board of Trustees to issue
an  unlimited number of full and fractional shares of beneficial interest in the
Trust and  to  classify or  reclassify  any unissued  shares  into one  or  more
additional  classes of shares. Pursuant to  such authority, the Trust has issued
three classes  of shares  for twelve  investment portfolios  of the  Trust.  The
Declaration  of Trust further authorizes the  Trustees to classify or reclassify
any class  of shares  into one  or more  sub-classes. The  issuance of  separate
classes   of  shares  is  intended  to   address  the  different  service  needs
    
 
                                       13
<PAGE>
of different types of investors. Each share represents interests in each Fund in
proportion to  each share's  net  asset value,  except  that shares  of  certain
classes  bear fees and expenses for certain shareholder services or distribution
and support services provided to that class.
 
    As a Massachusetts business trust, the Trust is not required to hold  annual
meetings of shareholders. However, the Trust will call a meeting of shareholders
where  required by law for purposes such  as voting upon the question of removal
of a member of the Board of Trustees upon written request of shareholders owning
at least  10%  of  the  outstanding  shares  of  the  Trust  entitled  to  vote.
Shareholders  of the  Trust are entitled  to one  vote for each  full share held
(irrespective of class or portfolio) and fractional votes for fractional  shares
held.
 
   
    The  Trust has adopted a  Plan of Distribution pursuant  to Rule 12b-1 under
which shares of  other classes  ("Select Shares"  and "Premier  Shares") of  the
Funds  are sold to investors. Pursuant to the Plan of Distribution Select Shares
are sold  to  institutional  investors and  bear  fees  payable at  a  rate  not
exceeding  .35% (on an annualized basis) of the average daily net asset value of
the  shares  beneficially  owned  by  such  investors  in  return  for   certain
administrative  and  shareholder services  provided  by Lehman  Brothers  or the
institutional  investors.  These  services  may  include  processing   purchase,
exchange  and redemption requests from shareholders  and placing orders with the
Transfer Agent; processing dividend and distribution payments from the Funds  on
behalf  of  shareholders;  providing  information  periodically  to shareholders
showing their positions  in shares;  responding to  inquiries from  shareholders
concerning  their investment in shares; arranging  for bank wires; and providing
such other similar services as may  be reasonably requested. Premier Shares  are
offered  by Lehman  Brothers directly to  individual investors.  Pursuant to the
Plan of Distribution, the Fund has agreed  to pay Lehman Brothers a monthly  fee
at  an annual rate  of up to  .50% of the  average daily net  asset value of the
Premier Shares  for  distribution and  other  services provided  to  holders  of
Premier  Shares.  Shares of  each class  will  bear all  fees paid  for services
provided to that class under the Plan of Distribution.
    
 
                                       14
<PAGE>
                LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
 
   
                            Prime Money Market Fund
                         Prime Value Money Market Fund
                    Government Obligations Money Market Fund
                 100% Government Obligations Money Market Fund
                   Treasury Instruments Money Market Fund II
                  100% Treasury Instruments Money Market Fund
                          Municipal Money Market Fund
                           Tax-Free Money Market Fund
                     California Municipal Money Market Fund
                       Floating Rate U.S. Government Fund
                      Short Duration U.S. Government Fund
    
 
                            ------------------------
 
NO  PERSON  HAS  BEEN  AUTHORIZED  TO  GIVE  ANY  INFORMATION  OR  TO  MAKE  ANY
REPRESENTATIONS NOT CONTAINED IN THIS PROSPECTUS, OR IN THE FUND'S STATEMENT  OF
ADDITIONAL  INFORMATION INCORPORATED HEREIN BY REFERENCE, IN CONNECTION WITH THE
OFFERING MADE BY  THIS PROSPECTUS  AND, IF GIVEN  OR MADE,  SUCH INFORMATION  OR
REPRESENTATIONS  MUST NOT BE RELIED UPON AS  HAVING BEEN AUTHORIZED BY THE TRUST
OR ITS DISTRIBUTORS.  THIS PROSPECTUS  DOES NOT  CONSTITUTE AN  OFFERING BY  THE
TRUST  OR BY THE DISTRIBUTORS IN ANY JURISDICTION IN WHICH SUCH OFFERING MAY NOT
LAWFULLY BE MADE.
 
                              -------------------
 
                               TABLE OF CONTENTS
 

[CAPTION]
                                                 PAGE
                                                 -----
                                           
Background and Expense Information..........           2
Investment Objective and Policies...........           2
Purchase, Redemption and Exchange of
 Shares.....................................           8
Dividends...................................          10
Taxes.......................................          11
Management of the Fund......................          11
Performance Information.....................          13
Description of Shares.......................          13

 
                                 SHORT DURATION
                              U.S. GOVERNMENT FUND
 
                              -------------------
 
   
                                   PROSPECTUS
                               February 21, 1994
    
 
                             ---------------------
 
                                LEHMAN BROTHERS
 
THIS PROSPECTUS AND THE STATEMENT OF ADDITIONAL INFORMATION INCORPORATED  HEREIN
RELATE  PRIMARILY TO  THE FUND  AND DESCRIBE  ONLY THE  INVESTMENT OBJECTIVE AND
POLICIES,  OPERATIONS,  CONTRACTS  AND  OTHER  MATTERS  RELATING  TO  THE  FUND.
INVESTORS  WISHING  TO OBTAIN  SIMILAR INFORMATION  REGARDING THE  TRUST'S OTHER
PORTFOLIOS MAY OBTAIN SEPARATE PROSPECTUSES DESCRIBING THEM BY CONTACTING LEHMAN
BROTHERS AT 1-800-368-5556.

<PAGE>
                                LEHMAN BROTHERS
                      SHORT DURATION U.S. GOVERNMENT FUND
                       An Investment Portfolio Offered By
                Lehman Brothers Institutional Funds Group Trust
 
   
    Lehman  Brothers  Institutional  Funds  Group  Trust  (the  "Trust")  is  an
open-end, management investment company. The shares described in this Prospectus
represent interests in a class of shares ("Select Shares") of the Short Duration
U.S. Government Fund  (the "Fund"),  a diversified investment  portfolio of  the
Trust.   Fund  shares  may  not  be   purchased  by  individuals  directly,  but
institutional  investors  may  purchase   shares  for  accounts  maintained   by
individuals.
    
 
    The Fund's INVESTMENT OBJECTIVE is to provide a high level of current income
consistent  with  minimal  fluctuation  of net  asset  value.  The  Fund invests
primarily in a portfolio consisting of short duration adjustable rate,  floating
rate  and  fixed  rate U.S.  government  and agency  securities,  and repurchase
agreements collateralized by such obligations.
 
   
    LEHMAN BROTHERS  INC. sponsors  the  Fund and  acts  as Distributor  of  its
shares.  LEHMAN  BROTHERS  GLOBAL ASSET  MANAGEMENT  INC. serves  as  the Fund's
Investment Adviser.
    
 
    The address of the Fund is One Exchange Place, Boston, Massachusetts  02109.
The  Fund can be contacted  as follows: FOR PURCHASE  AND REDEMPTION ORDERS ONLY
CALL 1-800-851-3134;  for  yield  information  call  1-800-238-2560;  for  other
information call 1-800-368-5556.
 
   
    This  Prospectus briefly sets forth certain  information about the Fund that
investors should  know before  investing.  Investors are  advised to  read  this
Prospectus  and retain it for future reference. Additional information about the
Fund, contained  in a  Statement of  Additional Information  dated February  21,
1994,  as amended  or supplemented from  time to  time, has been  filed with the
Securities and Exchange Commission and is available to investors without  charge
by calling the Fund's Distributor at 1-800-368-5556. The Statement of Additional
Information is incorporated in its entirety by reference into this Prospectus.
    
 
    SHARES  OF THE  FUND ARE  NOT DEPOSITS OR  OBLIGATIONS OF,  OR GUARANTEED OR
ENDORSED BY, ANY BANK, AND SUCH SHARES ARE NOT FEDERALLY INSURED BY THE  FEDERAL
DEPOSIT INSURANCE CORPORATION, THE FEDERAL RESERVE BOARD OR ANY OTHER GOVERNMENT
AGENCY.  SHARES  OF THE  FUND INVOLVE  CERTAIN  INVESTMENT RISKS,  INCLUDING THE
POSSIBLE LOSS OF PRINCIPAL.
 
                            ------------------------
 
THESE SECURITIES  HAVE  NOT  BEEN  APPROVED OR  DISAPPROVED  BY  THE  SECURITIES
    AND   EXCHANGE   COMMISSION   OR   ANY   STATE   SECURITIES   COMMISSION
       NOR HAS  THE  SECURITIES  AND EXCHANGE  COMMISSION  OR  ANY  STATE
           SECURITIES   COMMISSION  PASSED   UPON  THE   ACCURACY  OR
               ADEQUACY OF  THIS PROSPECTUS.  ANY  REPRESENTATION
                      TO THE CONTRARY IS A CRIMINAL OFFENSE.
 
                            ------------------------
 
                                LEHMAN BROTHERS
 
February 21, 1994
<PAGE>
                       BACKGROUND AND EXPENSE INFORMATION
 
   
    The  Fund currently  offers three  separate classes  of shares,  only one of
which, Select Shares, is  offered by this Prospectus.  Each class represents  an
equal,  PRO RATA interest in the Fund. Each share accrues daily dividends in the
same manner,  except  that  Select Shares  bear  fees  payable by  the  Fund  to
institutional  investors for services  they provide to  the beneficial owners of
such shares. See "Management of the Fund -- Service Organizations."
    
 
   
    The purpose of the following table is to assist an investor in understanding
the various costs and expenses that an investor in the Fund would bear  directly
or  indirectly.  Certain  institutions also  may  charge their  clients  fees in
connection with investments in  Select Shares, which fees  are not reflected  in
the  table  below.  For more  complete  descriptions  of the  various  costs and
expenses, see "Management of the Fund"  in this Prospectus and the Statement  of
Additional Information.
    
 
                                EXPENSE SUMMARY
 

                                              
 ANNUAL FUND OPERATING EXPENSES
  (as a percentage of average net assets)
     Advisory Fees (net of waivers)...........    .17
     Rule 12b-1 fees..........................    .35
     Other Expenses -- including
      Administration Fees.....................    .23
                                                 -----
     Total Fund Operating Expenses (after
      expense reimbursement)..................    .75
                                                 -----
                                                 -----

 
- ---------
 

[CAPTION]
 EXAMPLE
                                                         
 You  would pay the following  expenses on a $1,000
 investment, assuming (1)  a 5%  annual return  and
 (2) redemption at the end of each time period with
 respect to the following shares:
 
[CAPTION]
                                                      1 YEAR   3 YEARS
                                                      ------   -------
                                                         
                                                      $   8    $   24

 
THE  FOREGOING SHOULD NOT BE CONSIDERED  A REPRESENTATION OF ACTUAL EXPENSES AND
RATE OF RETURN, WHICH MAY BE GREATER OR LESSER THAN THOSE SHOWN.
 
   
    The Fund's Investment  Adviser has voluntarily  agreed to waive  its fee  or
reimburse  the Fund  to the extent  necessary to maintain  the Fund's annualized
expense ratio at .75%. The voluntary waiver or reimbursement will not be changed
unless shareholders are provided at least 60 days' advance notice. In  addition,
the Administrator may waive a portion of its fees which will assist in achieving
this  expense ratio. Absent waivers or  reimbursement of expenses, Advisory Fees
with respect to Select  Shares would be .30%  annually, Other Expenses would  be
.25% annually and the Total Fund Operating Expenses would be .95%, of the Fund's
average daily net assets. The foregoing table has not been audited by the Fund's
independent accountants.
    
 
                       INVESTMENT OBJECTIVE AND POLICIES
 
    The  investment objective of the Fund is  to provide a high level of current
income consistent with minimal  fluctuation of net  asset value. Current  income
includes, in general, discount earned on U.S. Treasury bills and agency discount
notes,  interest earned on mortgage-related securities and other U.S. government
and agency
 
                                       2
<PAGE>
securities, and short-term capital gains. While  there can be no assurance  that
the Fund will be able to maintain minimal fluctuation of net asset value or that
it  will  achieve its  investment  objective, the  Fund  endeavors to  do  so by
following the investment policies described in this Prospectus.
 
   
    The Fund  pursues  its investment  objective  by investing  primarily  in  a
professionally  managed portfolio  of adjustable  rate, floating  rate and fixed
rate securities which are  issued or guaranteed as  to payment of principal  and
interest  by the U.S. government, its agencies or instrumentalities. As a mutual
fund with "U.S.  Government" in its  name, under normal  market conditions,  the
Fund  must  invest  at least  65%  of  its portfolio  in  such  instruments. For
temporary defensive purposes, the  Adviser may determine that  it is prudent  to
hold a portion of the Fund's portfolio in high quality money market instruments,
including  commercial  paper and  other  corporate obligations  having remaining
maturities of one year or less and which are rated A-1 by S&P Corporation or P-1
by Moody's Investor Service, Inc.
    
 
DURATION
 
   
    Under normal interest rate conditions, the Fund's average portfolio duration
will be approximately the same as  a one-year U.S. Treasury Bill  (approximately
one year). This means that the Fund's net asset value fluctuation is expected to
be similar to the price fluctuation of a one-year U.S. Treasury Bill. The Fund's
average  portfolio is not  expected to exceed  that of a  two-year U.S. Treasury
Note (approximately  1.9  years).  In  computing the  average  duration  of  its
portfolio,  the Fund will estimate the  duration of obligations that are subject
to prepayment or redemption by the issuer, taking into account the influence  of
interest  rates  on  prepayments  and coupon  flows.  Maturity,  in  contrast to
duration, measures only the time until final payment is due on an investment; it
does not take  into account the  pattern of  a security's cash  flow over  time,
including  how cash flow is  affected by prepayments and  by changes in interest
rates.
    
 
SPECIFIC INVESTMENTS AND INVESTMENT TECHNIQUES
 
    The types of U.S. government securities in which the Fund may invest include
direct obligations of the U.S. Treasury, such as U.S. Treasury bills, notes, and
bonds, as well as obligations of U.S. government agencies or  instrumentalities.
The Fund may invest in U.S. government securities which are collateralized by or
represent  interests in real estate mortgages.  The types of mortgage securities
in which the Fund may invest include the following: (i) adjustable rate mortgage
securities; (ii) collateralized mortgage obligations; (iii) real estate mortgage
investment conduits; and (iv) other securities collateralized by or representing
interests in  real  estate mortgages  whose  interest rates  reset  at  periodic
intervals  and are issued or guaranteed by  the U.S. government, its agencies or
instrumentalities.
 
    The Fund may also invest in mortgage-related securities which are issued  by
private  entities such as investment banking  firms and companies related to the
construction industry. The privately issued mortgage-related securities in which
the  Fund  may  invest  include:  (i)  privately  issued  securities  which  are
collateralized  by pools of mortgages in which each mortgage is guaranteed as to
payment of principal and  interest by an agency  or instrumentality of the  U.S.
government;  (ii) privately issued securities  which are collateralized by pools
of mortgages in which  payment of principal and  interest are guaranteed by  the
issuer  and such guarantee is collateralized  by U.S. government securities; and
(iii) other privately issued  securities in which the  proceeds of the  issuance
are  invested in  mortgage-backed securities  and payment  of the  principal and
interest are supported  by the credit  of any agency  or instrumentality of  the
U.S. government.
 
    The  privately  issued  mortgage-related  securities  provide  for  periodic
payments consisting  of both  interest and  principal. The  interest portion  of
these  payments  will be  distributed by  the  Fund as  income, and  the capital
portion will be reinvested.
 
                                       3
<PAGE>
    U.S. GOVERNMENT SECURITIES.   Securities  issued or guaranteed  by the  U.S.
Government   or  its   agencies  or  instrumentalities   include  U.S.  Treasury
securities, which differ in  interest rates, maturities  and times of  issuance.
Treasury  bills have initial maturities of one year or less; Treasury notes have
initial maturities  of one  to  ten years;  and  Treasury Bonds  generally  have
initial  maturities  of  greater  than ten  years.  Some  obligations  issued or
guaranteed by  U.S.  Government  agencies and  instrumentalities,  for  example,
Government   National  Mortgage   Association  pass-through   certificates,  are
supported by the full  faith and credit  of the U.S.  Treasury; others, such  as
those  issued  by the  Federal National  Mortgage Association,  by discretionary
authority of the U.S. Government to  purchase certain obligations of the  agency
or  instrumentality;  and  others, such  as  those  issued by  the  Student Loan
Marketing Association,  only by  the credit  of the  agency or  instrumentality.
These  securities bear fixed, floating or  variable rates of interest. While the
U.S. Government  provides financial  support to  such U.S.  Government-sponsored
agencies  or instrumentalities, no assurance can be given that it will always do
so, since it is not so obligated by law. The Fund will invest in such securities
only when it is  satisfied that the  credit risk with respect  to the issuer  is
minimal.
 
    ADJUSTABLE  RATE  MORTGAGE  SECURITIES  ("ARMS").    ARMS  are  pass-through
mortgage securities with adjustable rather  than fixed interest rates. The  ARMS
in which the Fund invests are issued by Government National Mortgage Association
("GNMA"),  Federal National Mortgage Association  ("FNMA") and Federal Home Loan
Mortgage Corporation ("FHLMC") and are actively traded. The underlying mortgages
which collateralize ARMS  issued by  GNMA are  fully guaranteed  by the  Federal
Housing  Administration ("FHA")  or Veterans Administration  ("VA"), while those
collateralizing  ARMS  issued  by  FHLMC  or  FNMA  are  typically  conventional
residential  mortgages  conforming  to  strict  underwriting  size  and maturity
constraints.
 
    Unlike conventional bonds, ARMS pay back principal over the life of the ARMS
rather than at maturity.  Thus, a holder  of the ARMS, such  as the Fund,  would
receive  monthly scheduled  payments of principal  and interest  and may receive
unscheduled  principal  payments   representing  payments   on  the   underlying
mortgages.  At the time that a holder of the ARMS reinvests the payments and any
unscheduled prepayments of principal that it receives, the holder may receive  a
rate of interest paid on the existing ARMS. As a consequence, ARMS may be a less
effective  means of  "locking in" long-term  interest rates than  other types of
U.S. government securities.
 
    Not unlike other U.S. government securities,  the market value of ARMS  will
generally vary inversely with changes in market interest rates. Thus, the market
value  of ARMS generally  declines when interest rates  rise and generally rises
when interest rates decline.
 
    While ARMS generally entail less risk of a decline during periods of rapidly
rising rates, ARMS may  also have less potential  for capital appreciation  than
other   similar  investments  (e.g.,  investments  with  comparable  maturities)
because, as interest rates decline, the likelihood increases that mortgages will
be  prepaid.  Furthermore,  if  ARMS  are  purchased  at  a  premium,   mortgage
foreclosures  and unscheduled  principal payments may  result in some  loss of a
holder's principal investment to the extent of the premium paid. Conversely,  if
ARMS  are purchased at a discount, both  a scheduled payment of principal and an
unscheduled prepayment of principal would increase current and total returns and
would accelerate the  recognition of income,  which would be  taxed as  ordinary
income when distributed to shareholders.
 
    COLLATERALIZED  MORTGAGE  OBLIGATIONS ("CMOS").   CMOs  are bonds  issued by
single-purpose,  stand-alone  finance  subsidiaries   or  trusts  of   financial
institutions,  government agencies, investment banks or companies related to the
construction industry. CMOs purchased by the Fund may be:
 
    (a)   collateralized  by  pools  of mortgages  in  which  each  mortgage  is
       guaranteed  as  to payment  of  principal and  interest  by an  agency or
       instrumentality of the U.S. government;
 
                                       4
<PAGE>
    (b) collateralized by pools of mortgages  in which payment of principal  and
       interest is guaranteed by the issuer and such guarantee is collateralized
       by U.S. government securities; or
 
    (c)    securities in  which the  proceeds  of the  issuance are  invested in
       mortgage securities  and  payment  of  the  principal  and  interest  are
       supported  by  the credit  of an  agency or  instrumentality of  the U.S.
       government.
 
    All CMOs  purchased  by  the  Fund  are investment  grade,  as  rated  by  a
nationally recognized statistical rating organization.
 
    REAL  ESTATE MORTGAGE INVESTMENT CONDUITS  ("REMICS").  REMICs are offerings
of multiple class real estate mortgage-backed securities which qualify and elect
treatment as such  under provisions  of the  Internal Revenue  Code. Issuers  of
REMICs  may  take several  forms,  such as  trusts,  partnerships, corporations,
associations or a segregated pool of mortgages. Once REMIC status is elected and
obtained, the entity is not subject to federal income taxation. Instead,  income
is  passed through  the entity and  is taxed to  the person or  persons who hold
interests in the REMIC. A REMIC interest must consist of one or more classes  of
"regular interests," some of which may offer adjustable rates (the type in which
the  Fund primarily  invests), and  a single  class of  "residual interests." To
qualify as a REMIC,  substantially all of  the assets of the  entity must be  in
assets directly or indirectly secured principally by real property.
 
    STRIPPED MORTGAGE-BACKED SECURITIES ("SMBS").  The Fund may invest up to 10%
of   its  total  assets  in  SMBS,  which  are  derivative  multiclass  mortgage
securities. The Fund may only  invest in SMBS issued  or guaranteed by the  U.S.
Government,  its agencies or instrumentalities. SMBS are usually structured with
two classes that  receive different  proportions of the  interest and  principal
distributions  from a  pool of  mortgage assets,  which may  consist of mortgage
loans or guaranteed mortgage  pass-through certificates. A  common type of  SMBS
will have one class receiving all or a portion of the interest from the mortgage
assets,  while the other class  will receive all of  the principal. Moreover, in
some instances, one  class will receive  some of  the interest and  most of  the
principal  while  the other  class will  receive  most of  the interest  and the
remainder of the principal. If the underlying mortgage assets experience greater
than anticipated prepayments of principal, there may no longer be interest  paid
on  some of the underlying mortgage loans and the Fund, as a result, may fail to
fully recoup its initial investment in these securities. Although the market for
such securities  is  increasingly  liquid,  certain  SMBS  may  not  be  readily
marketable and will be considered illiquid for purposes of the Fund's limitation
on  investments in illiquid securities. The market value of the class consisting
entirely of principal payments  generally is unusually  sensitive to changes  in
interest  rates. The market  value of the class  consisting entirely of interest
payments is extremely sensitive not only  to changes in interest rates but  also
to  the  rate  of  principal payments,  including  prepayments,  on  the related
underlying mortgage assets. The yields on a  class of SMBS that receives all  or
most  of the interest from mortgage  assets are generally higher than prevailing
market yields  on  other  mortgage-backed securities  because  their  cash  flow
patterns  are  more  variable and  there  is  a greater  risk  that  the initial
investment will  not be  fully recouped.  The Investment  Adviser will  seek  to
manage  these risks (and potential  benefits) by investing in  a variety of such
securities and by using certain hedging techniques.
 
OTHER INVESTMENTS AND PRACTICES
 
   
    RESETS.  The interest rates paid on  the ARMS, CMOs and REMICs in which  the
Fund  invests generally are readjusted or reset at intervals of one year or less
to an increment over some predetermined interest rate index. There are two  main
categories of indices: those based on U.S. Treasury securities and those derived
from  a calculated measure, such as a cost of funds index or a moving average of
mortgage rates. Commonly  utilized indices  include the  one-year and  five-year
Constant  Maturity Treasury (CMT) rates, the three-month Treasury Bill rate, the
180-day Treasury  Bill  rate,  rates on  longer-term  Treasury  securities,  the
National Median Cost of
    
 
                                       5
<PAGE>
   
Funds  (COFI),  the  one-month  or  three-month  London  Interbank  Offered Rate
(LIBOR), the prime  rate of  a specific bank,  or commercial  paper rates.  Some
indices,  such  as  the one-year  CMT  rate,  closely mirror  changes  in market
interest rate levels. Others tend to lag changes in market rate levels and  tend
to be somewhat less volatile.
    
 
    CAPS  AND FLOORS.   The underlying  mortgages which  collateralize the ARMS,
CMOs and REMICs in which the Fund  invests may have caps and floors which  limit
the maximum amount by which the loan rate to the residential borrower may change
up  or down: (1) per reset  or adjustment interval and (2)  over the life of the
loan. Some residential mortgage loans restrict periodic adjustments by  limiting
changes  in the borrower's  monthly principal and  interest payments rather than
limiting interest  rate  changes. These  payment  caps may  result  in  negative
amortization.
 
    The  value of mortgage securities in which  the Fund invests may be affected
if market interest rates rise or fall faster and farther than the allowable caps
or floors on the underlying residential mortgage loans. An example of the effect
of caps and floors on a residential mortgage loan may be found in the  Statement
of  Additional Information. Additionally, even though  the interest rates on the
underlying residential mortgages  are adjustable,  amortization and  prepayments
may  occur, thereby causing the effective  maturities of the mortgage securities
in which  the Fund  invests to  be shorter  than the  maturities stated  in  the
underlying mortgages.
 
    REPURCHASE  AGREEMENTS.   Repurchase  agreements  are arrangements  in which
banks, broker/dealers,  and other  recognized financial  institutions sell  U.S.
government  securities or other securities to the  Fund and agree at the time of
sale to repurchase them at a mutually agreed upon time and price within one year
from the date of acquisition.  To the extent that  the original seller does  not
repurchase  the securities from the  Fund, the Fund could  receive less than the
repurchase price on any sale of such securities.
 
    REVERSE REPURCHASE  AGREEMENTS.   The Fund  may borrow  funds for  temporary
purposes  by entering into reverse repurchase  agreements in accordance with the
investment restrictions described below. Pursuant  to such agreements, the  Fund
would   sell  portfolio  securities  to  financial  institutions  and  agree  to
repurchase them  at an  agreed upon  date  and price.  The Fund  would  consider
entering   into  reverse  repurchase  agreements   to  avoid  otherwise  selling
securities during unfavorable market  conditions. Reverse repurchase  agreements
involve  the risk that the market value  of the portfolio securities sold by the
Fund may decline  below the price  of the  securities the Fund  is obligated  to
repurchase.
 
    DOLLAR  ROLL TRANSACTIONS.  In order to enhance portfolio returns and manage
prepayment risks, the Fund may engage  in dollar roll transactions with  respect
to  mortgage  securities  issued by  GNMA,  FNMA  and FHLMC.  In  a  dollar roll
transaction, the Fund sells a mortgage security to a financial institution, such
as  a  bank  or  broker/dealer,  and  simultaneously  agrees  to  repurchase   a
substantially  similar  (same  type,  coupon, and  maturity)  security  from the
institution at a  later date at  an agreed upon  price. The mortgage  securities
that  are  repurchased will  bear  the same  interest  rate as  those  sold, but
generally will be collateralized by different pools of mortgages with  different
prepayment  histories. During  the period between  the sale  and repurchase, the
Fund will not  be entitled  to receive interest  and principal  payments on  the
securities   sold.  Proceeds  of  the  sale   will  be  invested  in  short-term
instruments, and the income from these investments, together with any additional
fee income received on the sale, will generate income for the Fund exceeding the
yield. When the Fund enters into a dollar roll transaction, liquid assets of the
Fund, in a dollar amount  sufficient to make payment  for the obligations to  be
repurchased, are segregated at the trade date. These assets are marked to market
daily and are maintained until the transaction is settled.
 
    HEDGING  TRANSACTIONS.   To  assist in  reducing  fluctuations in  net asset
value, the Fund  may from time  to time engage  in certain hedging  transactions
involving   exchange  traded   options  or  futures   and  the   short  sale  of
 
                                       6
<PAGE>
these securities and  other acceptable investments  of the Fund,  to the  extent
that  such  transactions  are  in conformity  with  applicable  laws,  rules and
regulations. Although the use  of hedging strategies is  intended to reduce  the
Fund's  exposure to interest  rate volatility, it may  cause some fluctuation in
net asset value.
 
    ILLIQUID SECURITIES.  The  Fund will not knowingly  invest more than 15%  of
the  value  of  its total  net  assets  in illiquid  securities,  including time
deposits and repurchase  agreements having  maturities longer  than seven  days.
Securities that have readily available market quotations are not deemed illiquid
for  purposes  of  this limitation  (irrespective  of any  legal  or contractual
restrictions on resale). The Fund may invest in commercial obligations issued in
reliance on  the  so-called  "private  placement"  exemption  from  registration
afforded  by Section 4(2)  of the Securities  Act of 1933,  as amended ("Section
4(2) paper"). The  Fund may  also purchase  securities that  are not  registered
under the Securities Act of 1933, as amended, but which can be sold to qualified
institutional  buyers in  accordance with Rule  144A under that  Act ("Rule 144A
securities"). Section  4(2) paper  is  restricted as  to disposition  under  the
federal  securities laws, and generally is  sold to institutional investors such
as the Fund who agree that they are purchasing the paper for investment and  not
with  a view to public  distribution. Any resale by the  purchaser must be in an
exempt transaction. Section 4(2) paper normally is resold to other institutional
investors like  the  Fund  through or  with  the  assistance of  the  issuer  or
investment  dealers who make a market in  the Section 4(2) paper, thus providing
liquidity. Rule  144A  securities generally  must  be sold  to  other  qualified
institutional  buyers. If a particular investment  in Section 4(2) paper or Rule
144A securities is not determined to be liquid, that investment will be included
within the 15% limitation on investment  in illiquid securities. The ability  to
sell  Rule  144A  securities  to  qualified  institutional  buyers  is  a recent
development and it is not possible to predict how this market will mature.
 
    WHEN-ISSUED SECURITIES.    The  Fund  may  also  purchase  securities  on  a
"when-issued"   basis.  When-issued  securities  are  securities  purchased  for
delivery beyond the normal settlement date at a stated price and yield. The Fund
will generally not  pay for such  securities or start  earning interest on  them
until  they  are  received.  Securities purchased  on  a  when-issued  basis are
recorded as an asset and are subject  to changes in value based upon changes  in
the  general  level of  interest  rates. The  Fund  expects that  commitments to
purchase when-issued securities will  not exceed 25% of  the value of its  total
assets  absent unusual market  conditions. The Fund does  not intend to purchase
when-issued securities for speculative purposes  but only in furtherance of  its
investment objective.
 
    LENDING  OF PORTFOLIO SECURITIES.   In order  to generate additional income,
the Fund may lend portfolio securities up to one-third of the value of its total
assets to broker/dealers, banks, or other institutional borrowers of securities.
The Fund will only enter into  loan arrangements with broker/dealers, banks,  or
other  institutions which the Investment Adviser has determined are creditworthy
under guidelines established by  the Fund's Board of  Trustees and will  receive
collateral  in the form of cash or  U.S. government securities equal to at least
100% of the value of the securities loaned.
 
    TEMPORARY DEFENSIVE  POSITIONS.    When maintaining  a  temporary  defensive
position, the Fund may invest its assets, without limit, in commercial paper and
other  short-term  corporate obligations.  The  Fund's investment  in commercial
paper or corporate obligations  will be limited to  securities with one year  or
less  remaining to maturity and  rated A-1 by S&P  Corporation or P-1 by Moody's
Investor Service, Inc.
 
    PORTFOLIO TURNOVER.   Although the Fund  does not intend  to invest for  the
purpose  of seeking short-term profits, securities in its portfolio will be sold
whenever the Fund's Investment  Adviser believes it is  appropriate to do so  in
light of the Fund's investment objective, without regard to the length of time a
particular security may have been held.
 
                                       7
<PAGE>
INVESTMENT LIMITATIONS
 
    The  Fund's investment  objective and the  policies described  above are not
fundamental and may be changed by the  Trust's Board of Trustees without a  vote
of  shareholders. If there is a change in the investment objective, shareholders
should consider whether the Fund remains  an appropriate investment in light  of
their   then  current  financial  position  and  needs.  The  Fund's  investment
limitations summarized below may not be changed without the affirmative vote  of
the  holders of a majority of its  outstanding shares. There can be no assurance
that the Fund  will achieve its  investment objective. (A  complete list of  the
investment  limitations that cannot be changed without a vote of shareholders is
contained in the Statement of Additional Information under "Investment Objective
and Policies.")
 
The Fund may not:
 
        1.   Borrow  money,  except that  the  Fund  may (i)  borrow  money  for
    temporary  or emergency purposes (not for leveraging or investment) and (ii)
    engage in reverse repurchase agreements or dollar roll transactions for  any
    purpose;  provided that (i) and (ii)  in combination do not exceed one-third
    of the value of the Fund's total assets (including the amount borrowed) less
    liabilities (other than borrowings).
 
        2.  Purchase any securities which would  cause 25% or more of the  value
    of its total assets at the time of purchase to be invested in the securities
    of  issuers  conducting  their  principal business  activities  in  the same
    industry, provided that there is  no limitation with respect to  investments
    in U.S. government obligations and obligations of domestic banks.
 
   
                  PURCHASE, REDEMPTION AND EXCHANGE OF SHARES
    
 
PURCHASE PROCEDURES
 
    Shares  of the Fund  are sold at the  net asset value per  share of the Fund
next determined  after receipt  of  a purchase  order  by Lehman  Brothers  Inc.
("Lehman  Brothers"), a  Distributor of the  Fund's shares.  Purchase orders for
shares are accepted only on days on  which both Lehman Brothers and the  Federal
Reserve  Bank of Boston are open for  business and must be transmitted to Lehman
Brothers by telephone at 1-800-851-3134 before 4:00 p.m., Eastern time.  Payment
in  federal funds immediately available to  the Custodian, Boston Safe Deposit &
Trust Company,  must be  received before  3:00 p.m.,  Eastern time  on the  next
business  day following  the order.  The Fund may  in its  discretion reject any
order for shares.  (Payment for  orders which are  not received  or accepted  by
Lehman   Brothers  will  be  returned  after   prompt  inquiry  to  the  sending
institution.) Any  person  entitled  to  receive  compensation  for  selling  or
servicing  shares of the Fund may  receive different compensation for selling or
servicing one class of shares over another Class.
 
    The minimum aggregate initial investment by an institution in the investment
portfolios that comprise  the Trust is  $1 million (with  not less than  $25,000
invested  in  any  one  investment portfolio  offered  by  the  Trust); however,
broker-dealers and other institutional  investors may set  a higher minimum  for
their  customers. To reach the  minimum Trust-wide initial investment, purchases
of shares may be  aggregated over a  period of six months.  There is no  minimum
subsequent investment.
 
   
    Conflict  of interest restrictions may apply  to an institution's receipt of
compensation paid by  the Fund in  connection with the  investment of  fiduciary
funds   in  Select  Shares.  See  also   "Management  of  the  Fund  --  Service
Organizations." Institutions, including  banks regulated by  the Comptroller  of
the  Currency and  investment advisers and  other money managers  subject to the
jurisdiction of the Securities and Exchange Commission, the Department of  Labor
or state commissions, are urged to consult their legal advisors before investing
fiduciary  funds in Select Shares.  See also "Management of  the Fund -- Banking
Laws."
    
 
                                       8
<PAGE>
    SUBACCOUNTING SERVICES.  Institutions are  encouraged to open single  master
accounts.  However, certain  institutions may wish  to use  the transfer agent's
subaccounting system to minimize their internal recordkeeping requirements.  The
transfer  agent  charges a  fee  based on  the  level of  subaccounting services
rendered. Institutions holding Fund shares in a fiduciary, agency, custodial  or
similar  capacity may charge or pass through subaccounting fees as part of or in
addition to normal trust or agency account  fees. They may also charge fees  for
other  services provided which may  be related to the  ownership of Fund shares.
This Prospectus should, therefore, be  read together with any agreement  between
the  customer and the institution with regard to the services provided, the fees
charged for those services and any restrictions and limitations imposed.
 
REDEMPTION PROCEDURES
 
    Redemption orders must be transmitted to Lehman Brothers by telephone in the
manner described herein. Shares  are redeemed at the  net asset value per  share
next  determined after  Lehman Brothers'  receipt of  the redemption  order. The
proceeds paid to  a shareholder upon  redemption may  be more or  less than  the
amount  invested  depending  upon a  share's  net  asset value  at  the  time of
redemption.
 
    Subject to the foregoing, payment for redeemed shares for which a redemption
order is received by Lehman  Brothers before 4:00 p.m.,  Eastern time, on a  day
that  both Lehman Brothers and  the Federal Reserve Bank  of Boston are open for
business is normally made in federal funds wired to the redeeming shareholder on
the next business  day following  the redemption  order. The  Fund reserves  the
right  to  wire  redemption  proceeds  within  seven  days  after  receiving the
redemption order  if, in  the judgment  of the  Investment Adviser,  an  earlier
payment could adversely affect the Fund.
 
    The  Fund shall have the right to redeem involuntarily shares in any account
at their net asset value if the value of the account is less than $10,000  after
60  days' prior written notice to the  shareholder. Any such redemption shall be
effected at the net asset value  per share next determined after the  redemption
order  is entered.  If during  the 60 day  period the  shareholder increases the
value of its account to $10,000 or more, no such redemption shall take place. In
addition, the  Fund may  redeem shares  involuntarily or  suspend the  right  of
redemption  as permitted  under the Investment  Company Act of  1940, as amended
(the "1940  Act"),  or under  certain  special circumstances  described  in  the
Statement  of Additional  Information under "Additional  Purchase and Redemption
Information."
 
    The ability to give telephone instructions for the redemption (and  purchase
or  exchange) of shares is automatically established on a shareholder's account.
However, the Fund reserves the right to refuse a redemption order transmitted by
telephone if it is  believed advisable to do  so. Procedures for redeeming  Fund
shares  by telephone may  be modified or terminated  at any time  by the Fund or
Lehman Brothers. In addition, neither the Fund, Lehman Brothers nor the Transfer
Agent will be responsible for the authenticity of telephone instructions for the
purchase, redemption or exchange of shares where the instructions are reasonably
believed to be genuine.  Accordingly, the investor will  bear the risk of  loss.
The  Fund will  attempt to confirm  that telephone instructions  are genuine and
will use such procedures as  are considered reasonable, including the  recording
of  telephone instructions. To the extent that  the Fund fails to use reasonable
procedures to  verify  the genuineness  of  telephone instructions,  it  or  its
service  providers  may  be  liable  for  such  instructions  that  prove  to be
fraudulent or unauthorized.
 
    To allow  the Fund's  Investment  Adviser to  manage the  Fund  effectively,
investors  are strongly urged to initiate all investments or redemptions of Fund
shares as early in the  day as possible and to  notify Lehman Brothers at  least
one day in advance of transactions in excess of $5 million.
 
                                       9
<PAGE>
   
EXCHANGE PROCEDURES
    
   
    The  Exchange Privilege enables a shareholder to exchange shares of the Fund
without charge  for shares  of other  funds of  the Trust  which have  different
investment  objectives  that may  be  of interest  to  shareholders. To  use the
Exchange Privilege, exchange instructions  must be given  to Lehman Brothers  by
telephone. See "Redemption Procedures." In exchanging shares, a shareholder must
meet the minimum initial investment requirement of the other fund and the shares
involved  must be legally available for sale  in the state where the shareholder
resides. Before any exchange, the shareholder must also obtain and should review
a copy of  the prospectus of  the fund into  which the exchange  is being  made.
Prospectuses  may be  obtained from  Lehman Brothers  by calling 1-800-368-5556.
Shares will be exchanged at the net asset value next determined after receipt of
an exchange request  in proper  form. The  exchange of  shares of  one fund  for
shares  of another fund is treated for Federal  Income Tax purposes as a sale of
the shares given in  exchange by the shareholder  and, therefore, a  shareholder
may  realize a taxable gain  or loss. The Fund reserves  the right to reject any
exchange request in whole or in part. The Exchange Privilege may be modified  or
terminated at any time upon notice to shareholders.
    
 
VALUATION OF SHARES--NET ASSET VALUE
 
    The  Fund's net asset value  per share for purposes  of pricing purchase and
redemption orders is  determined by the  Fund's Administrator as  of 4:00  p.m.,
Eastern  time, on each  weekday, with the  exception of those  holidays on which
either the New  York Stock Exchange  or the  Federal Reserve Bank  of Boston  is
closed. Currently, one or both of these institutions are closed on the customary
national  business  holidays of  New Year's  Day, Martin  Luther King,  Jr. Day,
Presidents'  Day,  Good  Friday,  Memorial  Day  (observed),  Independence   Day
(observed),  Labor  Day,  Columbus  Day,  Veterans  Day,  Thanksgiving  Day  and
Christmas Day. The net  asset value per  share of Fund  shares is calculated  by
adding  the value of  all securities and  other assets of  the Fund, subtracting
liabilities, and  dividing  the  result  by  the  total  number  of  the  Fund's
outstanding  shares (irrespective of  class or sub-class).  The Fund's net asset
value per  share for  purposes  of pricing  purchase  and redemption  orders  is
determined  independently of the net asset value of the Trust's other investment
portfolios.
 
OTHER MATTERS
 
    Fund shares are sold and redeemed without charge by the Fund.  Institutional
investors  purchasing or  holding Fund  shares for  their customer  accounts may
charge customers  fees  for  cash  management and  other  services  provided  in
connection with their accounts. A customer should, therefore, consider the terms
of its account with an institution before purchasing Fund shares. An institution
purchasing  or redeeming Fund  shares on behalf of  its customers is responsible
for transmitting  orders to  Lehman  Brothers in  accordance with  its  customer
agreements.
 
                                   DIVIDENDS
 
    Shareholders of the Fund are entitled to dividends and distributions arising
only  from  the net  investment  income and  capital  gains, if  any,  earned on
investments held by the Fund. The Fund's net investment income is declared daily
as a dividend to shares held  of record at the close  of business on the day  of
declaration.  Shares begin accruing dividends on the next business day following
receipt of  the  purchase order  and  continue to  accrue  dividends up  to  and
including  the day  that such  shares are  redeemed. Dividends  are paid monthly
within five business days  after the end  of the month  or within five  business
days  after a redemption of all of a shareholder's shares of a particular class.
Net capital gains distributions, if any, will be made annually.
 
                                       10
<PAGE>
   
    Dividends are determined in the same manner and are paid in the same  amount
for  each Fund  share, except that  Select Shares  bear all the  expense of Rule
12b-1 distribution fees paid with  respect to such shares.  As a result, at  any
given  time, the net yield on Select Shares  will be lower than the net yield on
Institutional Shares and higher than the net yield on Premier Shares.
    
 
    Institutional shareholders may elect to  have their dividends reinvested  in
additional  full and fractional shares of the  same class of shares with respect
to which such dividends are  declared at the net asset  value of such shares  on
the  payment  date.  Reinvested  dividends receive  the  same  tax  treatment as
dividends paid in cash. Such election,  or any revocation thereof, must be  made
in  writing to  The Shareholder Services  Group, Inc. ("TSSG"),  a subsidiary of
First Data  Corporation  and  the  Fund's transfer  agent,  at  P.O.  Box  9690,
Providence, Rhode Island 02940-9690, and will become effective after its receipt
by TSSG, with respect to dividends paid.
 
    TSSG,  as transfer agent, will send  each Fund shareholder or its authorized
representative an  annual  statement designating  the  amount, if  any,  of  any
dividends  and  distributions  made  during  each  year  and  their  federal tax
qualification.
 
                                     TAXES
 
    The Fund intends to  qualify each year as  a "regulated investment  company"
under  the Internal Revenue Code  of 1986, as amended  (the "Code"). A regulated
investment company is exempt from federal  income tax on amounts distributed  to
its shareholders.
 
    Qualification as a regulated investment company under the Code for a taxable
year  requires, among other things, that the Fund distribute to its shareholders
at least 90% of its investment company taxable income for such year. In general,
the Fund's  investment  company  taxable  income  will  be  its  taxable  income
(including  dividends and short-term  capital gains, if  any) subject to certain
adjustments and excluding the excess of  any net long-term capital gain for  the
taxable  year over the net  short-term capital loss, if  any, for such year. The
Fund intends to distribute substantially  all of its investment company  taxable
income  each year. Such distributions will be taxable as ordinary income to Fund
shareholders who are  not currently  exempt from federal  income taxes,  whether
such  income is  received in cash  or reinvested in  additional shares. (Federal
income taxes for  distributions to  an IRA or  a qualified  retirement plan  are
deferred   under  the  Code.)  It  is   anticipated  that  none  of  the  Fund's
distributions  will  be  eligible  for  the  dividends  received  deduction  for
corporations.
 
    Dividends  declared in October, November or  December of any year payable to
shareholders of record on a specified date in such months will be deemed to have
been received by the shareholders  and paid by the Fund  on December 31 of  such
year  in  the event  such  dividends are  actually  paid during  January  of the
following year. Shareholders will be advised at least annually as to the federal
income tax status of distributions made to them each year.
 
    The foregoing discussion is  only a brief summary  of some of the  important
federal tax considerations generally affecting the Fund and its shareholders. As
noted above, IRAs receive special tax treatment. No attempt is made to present a
detailed  explanation of the federal, state or local income tax treatment of the
Fund or its shareholders,  and this discussion is  not intended as a  substitute
for  careful tax planning.  Accordingly, potential investors  in the Fund should
consult their tax advisors with specific reference to their own tax situation.
 
                             MANAGEMENT OF THE FUND
 
    The business and affairs of the Fund are managed under the direction of  the
Trust's  Board  of Trustees.  The  Trustees approve  all  significant agreements
between the Trust  and the  persons or companies  that furnish  services to  the
Fund,   including   agreements  with   its  Distributors,   Investment  Adviser,
Administrator, Custodian
 
                                       11
<PAGE>
and Transfer Agent. The day-to-day operations  of the Fund are delegated to  the
Fund's  Investment Adviser and Administrator. One Trustee and all of the Trust's
officers are affiliated with Lehman Brothers, The Boston Company Advisors,  Inc.
or  one of their affiliates. The Statement of Additional Information relating to
the Fund  contains general  background information  regarding each  Trustee  and
executive officer of the Trust.
 
INVESTMENT ADVISER--LEHMAN BROTHERS GLOBAL ASSET MANAGEMENT INC.
 
   
    Lehman  Brothers Global Asset Management Inc.  ("LBGAM"), located at 3 World
Financial Center, New  York, New  York 10285,  serves as  the Fund's  Investment
Adviser.  LBGAM is  a wholly owned  subsidiary of Lehman  Brothers Holdings Inc.
("Holdings"). All of the issued  and outstanding common stock (representing  92%
of  the voting stock)  of Holdings is  held by American  Express Company. LBGAM,
together with other  Lehman Brothers investment  advisory affiliates, serves  as
investment  adviser to investment companies and  private accounts and has assets
under management in excess of $17 billion.
    
 
    As Investment Adviser  to the Fund,  LBGAM manages the  Fund's portfolio  in
accordance   with  its  investment  objective  and  policies,  makes  investment
decisions for  the Fund,  places  orders to  purchase  and sell  securities  and
employs  professional  portfolio managers  and  securities analysts  who provide
research services to the Fund. For its  services LBGAM is entitled to a  monthly
fee  by the Fund at the  annual rate of .30% of  the value of the Fund's average
daily net assets.
 
    Kirk D. Hartman,  a Managing  Director of  LBGAM, has  been associated  with
Lehman  Brothers  in the  Mortgage  Department since  1987.  Mr. Hartman  is the
portfolio manager primarily responsible  for managing the day-to-day  operations
of  the Fund, including the making of investment selections. Mr. Hartman will be
assisted by Andrew  J. Stenwall,  a Vice President  of LBGAM.  Mr. Hartman  will
manage the Fund as of commencement of operations.
 
ADMINISTRATOR--THE BOSTON COMPANY ADVISORS, INC.
 
    The  Boston  Company  Advisors,  Inc. ("Boston  Advisors"),  located  at One
Exchange Place, Boston, Massachusetts 02109, serves as the Fund's Administrator.
Boston Advisors is a wholly owned subsidiary of The Boston Company, Inc.,  which
is in turn a wholly owned subsidiary of Boston Group Holdings, Inc. ("BGH"). BGH
is  a  wholly owned  subsidiary of  Mellon  Bank Corporation.  As Administrator,
Boston Advisors  calculates  the  net  asset value  of  the  Fund's  shares  and
generally  assists in all aspects of the Fund's administration and operation. As
compensation for its services as Administrator, Boston Advisors is entitled to a
monthly fee at the annual rate of .10% of the value of the Fund's average  daily
net assets.
 
DISTRIBUTORS
 
    Lehman  Brothers, located  at 3 World  Financial Center, New  York, New York
10285, is a Distributor of the Fund. Lehman Brothers, a wholly owned  subsidiary
of  Holdings, is one of the leading  full-line investment firms serving the U.S.
and foreign securities and commodities markets. American Express Company and its
subsidiaries, other  than  Lehman  Brothers,  are  principally  engaged  in  the
businesses   of   providing   travel-related   services,   investment  services,
information services, international banking services and investors'  diversified
financial  services. Funds Distributor Inc., a wholly owned subsidiary of Lehman
Brothers located at One Exchange Place, Boston, Massachusetts 02109, also serves
as a distributor of the Fund.
 
SERVICE ORGANIZATIONS
 
   
    Under a Plan  of Distribution (the  "Plan") adopted pursuant  to Rule  12b-1
under  the 1940 Act, Select Shares bear  fees ("Rule 12b-1 fees") payable by the
Fund at the aggregate rate of up to .35% (on an annualized basis) of the average
daily net asset value  of such shares to  Lehman Brothers for providing  certain
services  to the Fund and  holders of Select Shares.  Lehman Brothers may retain
all the payments made to it under the Plan or may
    
 
                                       12
<PAGE>
   
enter into agreements with and make payments of up to .35% to investors such  as
banks,  savings and loan associations and other financial institutions ("Service
Organizations") for the provision of a portion of such services. These services,
which are described more fully in the Statement of Additional Information  under
"Management  of  the Funds  -- Service  Organizations," include  aggregating and
processing purchase  and redemption  requests  from shareholders  showing  their
positions  in  shares;  arranging  for  bank  wires;  responding  to shareholder
inquiries relating to the  services provided by Lehman  Brothers or the  Service
Organization  and handling correspondence;  and acting as  shareholder of record
and nominee. The Plan of Distribution also allows Lehman Brothers to use its own
resources to provide distribution services  and shareholder services. Under  the
terms  of the agreements, Service Organizations are required to provide to their
shareholders a  schedule  of any  fees  that  they may  charge  shareholders  in
connection with their investments in Select Shares.
    
 
EXPENSES
 
   
    The  Fund bears  all its  own expenses.  The Fund's  expenses include taxes,
interest, fees and  salaries of the  Trust's trustees and  officers who are  not
directors,  officers or employees of  the Fund's service contractors, Securities
and Exchange  Commission fees,  state securities  qualification fees,  costs  of
preparing and printing prospectuses for regulatory purposes and for distribution
to  shareholders, advisory  and administration  fees, charges  of the Custodian,
Transfer Agent  and  dividend  disbursing  agent,  certain  insurance  premiums,
outside   auditing  and  legal  expenses,   costs  of  shareholder  reports  and
shareholder meetings  and any  extraordinary expenses.  The Fund  also pays  for
brokerage fees and commissions (if any) in connection with the purchase and sale
of portfolio securities. In order to maintain a competitive expense ratio, LBGAM
has  agreed voluntarily to waive its fee or  to reimburse the Fund if and to the
extent that the Fund's total operating expenses exceed .75% of average daily net
assets. This  voluntary waiver  and  reimbursement will  not be  changed  unless
shareholders  are provided  at least 60  days' advance notice.  In addition, the
Investment Adviser has agreed  to reimburse the Fund  to the extent required  by
applicable state law for certain expenses that are described in the Statement of
Additional  Information relating to the Fund.  Any fees charged by institutional
investors to their customers in connection  with investments in Fund shares  are
not reflected in the Fund's expenses.
    
 
BANKING LAWS
 
    Banking  laws  and regulations  presently  prohibit a  bank  holding company
registered under the Federal  Bank Holding Company  Act of 1956  or any bank  or
non-bank  affiliate  thereof  from  sponsoring,  organizing,  or  controlling  a
registered, open-end investment company engaged continuously in the issuance  of
its  shares and prohibit banks generally from issuing, underwriting, selling, or
distributing securities such as Fund  shares. Such banking laws and  regulations
do  not prohibit  such a  holding company or  affiliate or  banks generally from
acting as investment adviser, transfer agent or custodian to such an  investment
company  or from purchasing  shares of such a  company for or  upon the order of
customers. Some Service Organizations  may be subject to  such banking laws  and
regulations.  In addition, state  securities laws on this  issue may differ from
the interpretation  of federal  law  expressed herein  and banks  and  financial
institutions may be required to register as dealers pursuant to state law.
 
   
    Should  future legislative,  judicial or  administrative action  prohibit or
restrict the  activities  of  bank  Service Organizations,  the  Fund  might  be
required to alter or discontinue its arrangements with Service Organizations and
change  its  method of  operations with  respect  to Premier  Shares. It  is not
anticipated, however, that any change in  the Fund's method of operations  would
affect  its net  asset value  per shares or  result in  a financial  loss to any
customer.
    
 
                                       13
<PAGE>
                            PERFORMANCE INFORMATION
 
   
    From time to  time, in  advertisements or  in reports  to shareholders,  the
"total  return," "yields" and "effective yields" for shares may be quoted. Total
return and yield quotations  are computed separately for  each class of  shares.
"Total  return" for a particular  class of shares represents  the change, over a
specified period of  time, in the  value of  an investment in  the shares  after
reinvesting  all  income and  capital gain  distributions.  It is  calculated by
dividing that change by the initial investment and is expressed as a percentage.
The "yield" quoted in advertisements for a particular class of shares refers  to
the  income generated by  an investment in  such shares over  a specified period
(such as a 30-day period) identified  in the advertisement. This income is  then
"annualized";  that is, the amount of  income generated by the investment during
that period  is assumed  to be  generated each  such period  over a  52-week  or
one-year  period and is shown as a  percentage of the investment. The "effective
yield" is calculated  similarly but, when  annualized, the income  earned by  an
investment  in a  particular class is  assumed to be  reinvested. The "effective
yield" will  be slightly  higher than  the "yield"  because of  the  compounding
effect of this assumed reinvestment.
    
 
    Distribution   rates  may  also  be  quoted  for  the  Fund.  Quotations  of
distribution rates are calculated by annualizing the most recent distribution of
net investment income  for a  monthly, quarterly  or other  relevant period  and
dividing  this amount by the ending net asset value for the period for which the
distribution rates are being calculated.
 
   
    The Fund's performance may  be compared to that  of other mutual funds  with
similar  objectives, to stock or other relevant indices, or to rankings prepared
by independent services or other financial or industry publications that monitor
the performance of mutual funds. For example, such data are reported in national
financial publications such as MORNINGSTAR, INC., BARRON'S, IBC/DONOGHUE'S  INC.
BOND  FUND  REPORT, THE  WALL STREET  JOURNAL  and THE  NEW YORK  TIMES, reports
prepared by Lipper  Analytical Services,  Inc. and  publications of  a local  or
regional  nature.  The Fund's  Lipper  ranking in  the  "Short (1-5  Years) U.S.
Government Funds"  or "General  U.S. Government  Funds" categories  may also  be
quoted from time to time in advertising and sales literature.
    
 
   
    THE  FUND'S TOTAL RETURN AND  YIELD FIGURES FOR A  CLASS OF SHARES REPRESENT
PAST PERFORMANCE, WILL FLUCTUATE AND SHOULD NOT BE CONSIDERED AS  REPRESENTATIVE
OF  FUTURE RESULTS. The performance of any investment is generally a function of
portfolio quality and maturity, type  of investment and operating expenses.  Any
fees   charged  by  institutional  investors  directly  to  their  customers  in
connection with  investments in  Fund shares  are not  reflected in  the  Fund's
expenses,  total return or yields; and, such  fees, if charged, would reduce the
actual return received by  customers on their investments.  The methods used  to
compute  the Fund's total return and yields  are described in more detail in the
Statement of Additional Information.  Investors may call 1-800-238-2560  (Select
Shares Code: 213) to obtain current performance information.
    
 
                             DESCRIPTION OF SHARES
 
   
    The  Trust is  a Massachusetts  business trust  established on  November 25,
1992. The Trust's Declaration of Trust authorizes the Board of Trustees to issue
an unlimited number of full and fractional shares of beneficial interest in  the
Trust  and  to classify  or  reclassify any  unissued  shares into  one  or more
additional classes of shares. Pursuant to  such authority, the Trust has  issued
three  classes  of shares  for twelve  investment portfolios  of the  Trust. The
Declaration of Trust further authorizes  the Trustees to classify or  reclassify
any  class of  shares into  one or  more sub-classes.  The issuance  of separate
classes of  shares  is  intended  to address  the  different  service  needs  of
different  types of investors.  Each share represents interests  in each Fund in
proportion to  each share's  net  asset value,  except  that shares  of  certain
classes  bear fees and expenses for certain shareholder services or distribution
and support services provided to that class.
    
 
                                       14
<PAGE>
    As a Massachusetts business trust, the Trust is not required to hold  annual
meetings of shareholders. However, the Trust will call a meeting of shareholders
where  required by law for purposes such  as voting upon the question of removal
of a member of the Board of Trustees upon written request of shareholders owning
at least  10%  of  the  outstanding  shares  of  the  Trust  entitled  to  vote.
Shareholders  of the  Trust are entitled  to one  vote for each  full share held
(irrespective of class or portfolio) and fractional votes for fractional  shares
held.
 
   
    In addition to Select Shares, the Fund currently offers Institutional Shares
and  Premier Shares. Institutional Shares are sold to institutions that have not
entered into servicing  or other  agreements with  the Fund  in connection  with
their investments and pay no Rule 12b-1 distribution or shareholder service fee.
Premier  Shares are offered by Lehman  Brothers directly to individual investors
under the Plan of Distribution adopted  pursuant to Rule 12b-1. Pursuant to  the
Plan  of Distribution, the Fund has agreed  to pay Lehman Brothers a monthly fee
at an annual rate  of up to  .50% of the  average daily net  asset value of  the
Premier  Shares  for  distribution and  other  services provided  to  holders of
Premier Shares. Premier Shares will bear all fees paid for services provided  to
that class under the Plan of Distribution.
    
 
                                       15
<PAGE>
                LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
 
   
                            Prime Money Market Fund
                         Prime Value Money Market Fund
                    Government Obligations Money Market Fund
                 100% Government Obligations Money Market Fund
                   Treasury Instruments Money Market Fund II
                  100% Treasury Instruments Money Market Fund
                          Municipal Money Market Fund
                           Tax-Free Money Market Fund
                     California Municipal Money Market Fund
                       Floating Rate U.S. Government Fund
                      Short Duration U.S. Government Fund
    
 
                            ------------------------
 
NO  PERSON  HAS  BEEN  AUTHORIZED  TO  GIVE  ANY  INFORMATION  OR  TO  MAKE  ANY
REPRESENTATIONS NOT CONTAINED IN THIS PROSPECTUS, OR IN THE FUND'S STATEMENT  OF
ADDITIONAL  INFORMATION INCORPORATED HEREIN BY REFERENCE, IN CONNECTION WITH THE
OFFERING MADE BY  THIS PROSPECTUS  AND, IF GIVEN  OR MADE,  SUCH INFORMATION  OR
REPRESENTATIONS  MUST NOT BE RELIED UPON AS  HAVING BEEN AUTHORIZED BY THE TRUST
OR ITS DISTRIBUTORS.  THIS PROSPECTUS  DOES NOT  CONSTITUTE AN  OFFERING BY  THE
TRUST  OR BY THE DISTRIBUTORS IN ANY JURISDICTION IN WHICH SUCH OFFERING MAY NOT
LAWFULLY BE MADE.
 
                              -------------------
 
                               TABLE OF CONTENTS
 

[CAPTION]
                                                 PAGE
                                                 -----
                                           
Background and Expense Information..........           2
Investment Objective and Policies...........           2
Purchase, Redemption and Exchange of
 Shares.....................................           8
Dividends...................................          10
Taxes.......................................          11
Management of the Fund......................          11
Performance Information.....................          14
Description of Shares.......................          14

 
                                 SHORT DURATION
                              U.S. GOVERNMENT FUND
 
                              -------------------
 
                                   PROSPECTUS
                               February 21, 1994
 
                             ---------------------
 
                                LEHMAN BROTHERS
 
THIS PROSPECTUS AND THE STATEMENT OF ADDITIONAL INFORMATION INCORPORATED  HEREIN
RELATE  PRIMARILY TO  THE FUND  AND DESCRIBE  ONLY THE  INVESTMENT OBJECTIVE AND
POLICIES,  OPERATIONS,  CONTRACTS  AND  OTHER  MATTERS  RELATING  TO  THE  FUND.
INVESTORS  WISHING  TO OBTAIN  SIMILAR INFORMATION  REGARDING THE  TRUST'S OTHER
PORTFOLIOS MAY OBTAIN SEPARATE PROSPECTUSES DESCRIBING THEM BY CONTACTING LEHMAN
BROTHERS AT 1-800-368-5556.
Lehman Brothers
Short Duration U.S. Government Fund

An Investment Portfolio Offered By
Lehman Brothers Institutional Funds Group Trust
   
	Lehman Brothers Institutional Funds Group Trust (the "Trust") is 
an open-end, management investment company.  The shares described in 
this Prospectus represent interests in a class of shares ("Premier 
Shares") of the Short Duration U.S. Government Fund (the "Fund"), a 
diversified investment portfolio of the Trust.
    

	The Fund's investment objective is to provide a high level of 
current income consistent with minimal fluctuation of net asset 
value.  The Fund invests primarily in a portfolio consisting of short 
duration adjustable rate, floating rate and fixed rate U.S. 
government and agency securities, and repurchase agreements 
collateralized by such obligations.

   
	Lehman Brothers Inc. sponsors the Fund and acts as Distributor 
of its shares.  Lehman Brothers Global Asset Management Inc. serves 
as the Fund's Investment Adviser.
    

	The address of the Fund is One Exchange Place, Boston, 
Massachusetts 02109.  Yield and other information may be obtained 
through a Lehman Brothers Investment Representative. 

   
	This Prospectus briefly sets forth certain information about the 
Fund that investors should know before investing.  Investors are 
advised to read this Prospectus and retain it for future reference.  
Additional information about the Fund, contained in a Statement of 
Additional Information dated February 21, 1994, as amended or 
supplemented from time to time, has been filed with the Securities 
and Exchange Commission and is available to investors without charge 
by calling the Fund's Transfer Agent at 1-800-451-2010.  The 
Statement of Additional Information is incorporated in its entirety 
by reference into this Prospectus.
    
	Shares of the Fund are not deposits or obligations of, or 
guaranteed or endorsed by, any bank, and such shares are not 
federally insured by the Federal Deposit Insurance Corporation, the 
Federal Reserve Board or any other government agency.  Shares of the 
Fund involve certain investment risks, including the possible loss of 
principal.
___________

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

___________

LEHMAN BROTHERS
   
February 21, 1994
    



BACKGROUND AND EXPENSE INFORMATION
   
	The Fund currently offers three separate classes of shares, only 
one of which, Premier Shares, is offered by this Prospectus.  Each 
class represents an equal, pro rata interest in the Fund.  Each share 
accrues daily dividends in the same manner, except that Premier 
Shares bear fees payable by the Fund to Lehman Brothers for services 
it provides to the beneficial owners of such shares.  See "Management 
of the Fund - Shareholder Services."
    
   
	The purpose of the following table is to assist an investor in 
understanding the various costs and expenses that an investor in the 
Fund would bear directly or indirectly.  For more complete 
descriptions of the various costs and expenses, see "Management of 
the Fund" in this Prospectus and the Statement of Additional 
Information.
    
Expense Summary

								



	Annual Fund Operating Expenses
(as a percentage of average net assets)


	Advisory Fees (net of waivers)	
   .17

	Rule 12b-1 fees	
   .50

	Other Expenses-including 
Administration Fees	
   .23_
___

	Total Fund Operating Expenses (after 
expense reimbursement)	

   .90 
    



_____

[CAPTION]
Example




	You would pay the following expenses 
on a $1,000 investment, assuming (1) a 5% 
annual return and (2) redemption at the end 
of each time period with respect to the 
following shares:
[CAPTION]




1 Year

3 Years



$9
$29


THE FOREGOING SHOULD NOT BE CONSIDERED A REPRESENTATION OF ACTUAL 
EXPENSES AND RATE OF RETURN, WHICH MAY BE GREATER OR LESSER THAN 
THOSE SHOWN.

   
	The Fund's Investment Adviser has voluntarily agreed to waive 
its fee or reimburse the Fund to the extent necessary to maintain the 
Fund's annualized expense ratio at .90%.  The voluntary waiver or 
reimbursement will not be changed unless shareholders are provided at 
least 60 days' advance notice.  In addition, the Administrator may 
waive a portion of its fees which will assist in achieving this 
expense ratio.  Absent waivers or reimbursement of expenses, Advisory 
Fees with respect to Premier Shares would be .30% annually, Other 
Expenses would be .25% annually and the Total Fund Operating Expenses 
would be 1.05%, of the Fund's average daily net assets.  The 
foregoing table has not been audited by the Fund's independent 
accountants. 
    


INVESTMENT OBJECTIVE AND POLICIES

	The investment objective of the Fund is to provide a high level 
of current income consistent with minimal fluctuation of net asset 
value.  Current income includes, in general, discount earned on U.S. 
Treasury bills and agency discount notes, interest earned on 
mortgage-related securities and other U.S. government and agency 
securities, and short-term capital gains.  While there can be no 
assurance that the Fund will be able to maintain minimal fluctuation 
of net asset value or that it will achieve its investment objective, 
the Fund endeavors to do so by following the investment policies 
described in this Prospectus.

   
	The Fund pursues its investment objective by investing primarily 
in a professionally managed portfolio of adjustable rate, floating 
rate and fixed rate securities which are issued or guaranteed as to 
payment of principal and interest by the U.S. government, its 
agencies or instrumentalities.  As a mutual fund with "U.S. 
Government" in its name, under normal market conditions, the Fund 
must invest at least 65% of its portfolio in such instruments.  
    
   
Duration
    
   
	Under normal interest rate conditions, the Fund's average 
portfolio duration will be approximately the same as a one-year U.S. 
Treasury Bill (approximately one year).  This means that the Fund's 
net asset value fluctuation is expected to be similar to the price 
fluctuation of a one-year U.S. Treasury Bill.  The Fund's average 
portfolio duration is not expected to exceed that of a two-year U.S. 
Treasury Note (approximately 1.9 years).  In computing the average 
duration of its portfolio, the Fund will estimate the duration of 
obligations that are subject to prepayment or redemption by the 
issuer, taking into account the influence of interest rates on 
prepayments and coupon flows.  Maturity, in contrast to duration, 
measures only the time until final payment is due on an investment; 
it does not take into account the pattern of a security's cash flow 
over time, including how cash flow is affected by prepayments and by 
changes in interest rates.
    
Acceptable Investments

	The types of U.S. government securities in which the Fund may 
invest include direct obligations of the U.S. Treasury, such as U.S. 
Treasury bills, notes, and bonds, as well as obligations of U.S. 
government agencies or instrumentalities. The Fund may invest in U.S. 
government securities which are collateralized by or represent 
interests in real estate mortgages.  The types of mortgage securities 
in which the Fund may invest include the following:  (i) adjustable 
rate mortgage securities; (ii) collateralized mortgage obligations; 
(iii) real estate mortgage investment conduits; and (iv) other 
securities collateralized by or representing interests in real estate 
mortgages whose interest rates reset at periodic intervals and are 
issued or guaranteed by the U.S. government, its agencies or 
instrumentalities.

	The Fund may also invest in mortgage-related securities which 
are issued by private entities such as investment banking firms and 
companies related to the construction industry.  The privately issued 
mortgage-related securities in which the Fund may invest include:  
(i) privately issued securities which are collateralized by pools of 
mortgages in which each mortgage is guaranteed as to payment of 
principal and interest by an agency or instrumentality of the U.S. 
government; (ii) privately issued securities which are collateralized 
by pools of mortgages in which payment of principal and interest are 
guaranteed by the issuer and such guarantee is collateralized by U.S. 
government securities; and (iii) other privately issued securities in 
which the proceeds of the issuance are invested in mortgage-backed 
securities and payment of the principal and interest are supported by 
the credit of any agency or instrumentality of the U.S. government.

	The privately issued mortgage-related securities provide for 
periodic payments consisting of both interest and principal.  The 
interest portion of these payments will be distributed by the Fund as 
income, and the capital portion will be reinvested.

	U.S. Government Securities.  Securities issued or guaranteed by 
the U.S. Government or its agencies or instrumentalities include U.S. 
Treasury securities, which differ in interest rates, maturities and 
times of issuance.  Treasury bills have initial maturities of one 
year or less; Treasury notes have initial maturities of one to ten 
years; and Treasury Bonds generally have initial maturities of 
greater than ten years.  Some obligations issued or guaranteed by 
U.S. Government agencies and instrumentalities, for example, 
Government National Mortgage Association pass-through certificates, 
are supported by the full faith and credit of the U.S. Treasury; 
others, such as those of issued by the Federal National Mortgage 
Association, by discretionary authority of the U.S. Government to 
purchase certain obligations of the agency or instrumentality; and 
others, such as those issued by the Student Loan Marketing 
Association, only by the credit of the agency or instrumentality.  
These securities bear fixed, floating or variable rates of interest.  
While the U.S. Government provides financial support to such U.S. 
Government-sponsored agencies or instrumentalities, no assurance can 
be given that it will always do so, since it is not so obligated by 
law.  The Fund will invest in such securities only when it is 
satisfied that the credit risk with respect to the issuer is minimal.

	Adjustable Rate Mortgage Securities ("ARMS").  ARMS are pass-
through mortgage securities with adjustable rather than fixed 
interest rates.  The ARMS in which the Fund invests are issued by 
Government National Mortgage Association ("GNMA"), Federal National 
Mortgage Association ("FNMA") and Federal Home Loan Corporation 
("FHLMC") and are actively traded.  The underlying mortgages which 
collateralize ARMS issued by GNMA are fully guaranteed by the Federal 
Housing Administration ("FHA") or Veterans Administration ("VA"), 
while those collateralizing ARMS issued by FHLMC or FNMA are 
typically conventional residential mortgages conforming to strict 
underwriting size and maturity constraints.

	Unlike conventional bonds, ARMS pay back principal over the life 
of the ARMS rather than at maturity.  Thus, a holder of the ARMS, 
such as the Fund, would receive monthly scheduled payments of 
principal and interest and may receive unscheduled principal payments 
representing payments on the underlying mortgages.  At the time that 
a holder of the ARMS reinvests the payments and any unscheduled 
prepayments of principal that it receives, the holder may receive a 
rate of interest paid on the existing ARMS.  As a consequence, ARMS 
may be a less effective means of "locking in" long-term interest 
rates than other types of U.S. government securities.

	Not unlike other U.S. government securities, the market value of 
ARMS will generally vary inversely with changes in market interest 
rates.  Thus, the market value of ARMS generally declines when 
interest rates rise and generally rises when interest rates decline.

	While ARMS generally entail less risk of a decline during 
periods of rapidly rising rates, ARMS may also have less potential 
for capital appreciation than other similar investments (e.g., 
investments with comparable maturities) because, as interest rates 
decline, the likelihood increases that mortgages will be prepaid.  
Furthermore, if ARMS are purchased at a premium, mortgage 
foreclosures and unscheduled principal payments may result in some 
loss of a holder's principal investment to the extent of the premium 
paid.  Conversely, if ARMS are purchased at a discount, both a 
scheduled payment of principal and an unscheduled prepayment of 
principal would increase current and total returns and would 
accelerate the recognition of income, which would be taxed as 
ordinary income when distributed to shareholders.

	Collateralized Mortgage Obligations ("CMOs").  CMOs are bonds 
issued by single-purpose, stand-alone finance subsidiaries or trusts 
of financial institutions, government agencies, investment banks, or 
companies related to the construction industry.  CMOs purchased by 
the Fund may be:

(a)		collateralized by pools of mortgages in which each 
mortgage is guaranteed as to 	payment of principal and interest by 
an agency or instrumentality of the U.S. 	government;

(b)		collateralized by pools of mortgages in which payment of 
principal and interest is 	guaranteed by the issuer and such 
guarantee is collateralized by U.S. government 	securities; or

(c)		securities in which the proceeds of the issuance are 
invested in mortgage securities 	and payment of the principal and 
interest are supported by the credit of an agency 	or 
instrumentality of the U.S. government.

	All CMOs purchased by the Fund are investment grade, as rated by 
a nationally recognized statistical rating organization.

	Real Estate Mortgage Investment Conduits ("REMICs").  REMICs are 
offerings of multiple class real estate mortgage-backed securities 
which qualify and elect treatment as such under provisions of the 
Internal Revenue Code.  Issuers of REMICs may take several forms, 
such as trusts, partnerships, corporations, associations or a 
segregated pool of mortgages.  Once REMIC status is elected and 
obtained, the entity is not subject to federal income taxation.  
Instead, income is passed through the entity and is taxed to the 
person or persons who hold interests in the REMIC.  A REMIC interest 
must consist of one or more classes of "regular interests," some of 
which may offer adjustable rates (the type in which the Fund 
primarily invests), and a single class of "residual interests".  To 
qualify as a REMIC, substantially all of the assets of the entity 
must be in assets directly or indirectly secured principally by real 
property.

	Stripped Mortgage-Backed Securities ("SMBS")	.  The Fund may 
invest up to 10% of its total assets in SMBS, which are derivative 
multiclass mortgage securities.  The Fund may only invest in SMBS 
issued or guaranteed by the U.S. Government, its agencies or 
instrumentalities.  SMBS are usually structured with two classes that 
receive different proportions of the interest and principal 
distributions from a pool of mortgage assets, which may consist of 
mortgage loans or guaranteed mortgage pass-through certificates.  A 
common type of SMBS will have one class receiving all or a portion of 
the interest from the mortgage assets, while the other class will 
receive all of the principal. Moreover, in some instances, one class 
will receive some of the interest and most of the principal while the 
other class will receive most of the interest and the remainder of 
the principal.  If the underlying mortgage assets experience greater 
than anticipated prepayments of principal, there may no longer be 
interest paid on some of the underlying mortgage loans and the Fund, 
as a result, may fail to fully recoup its initial investment in these 
securities.  Although the market for such securities is increasingly 
liquid, certain SMBS may not be readily marketable and will be 
considered illiquid for purposes of the Fund's limitation on 
investments in illiquid securities.  The market value of the class 
consisting entirely of principal payments generally is unusually 
sensitive to changes in interest rates.  The market value of the 
class consisting entirely of interest payments is extremely sensitive 
not only to changes in interest rates but also to the rate of 
principal payments, including prepayments, on the related underlying 
mortgage assets.  The yields on a class of SMBS that receives all or 
most of the interest from mortgage assets are generally higher than 
prevailing market yields on other mortgage-backed securities because 
their cash flow patterns are more variable and there is a greater 
risk that the initial investment will not be fully recouped.  The 
Investment Adviser will seek to manage these risks (and potential 
benefits) by investing in a variety of such securities and by using 
certain hedging techniques.

Other Investments and Practices
   
	Resets.  The interest rates paid on the ARMS, CMOs and REMICs in 
which the Fund invests generally are readjusted or reset at intervals 
of one year or less to an increment over some predetermined interest 
rate index.  There are two main categories of indices:  those based 
on U.S. Treasury securities and those derived from a calculated 
measure, such as a cost of funds index or a moving average of 
mortgage rates.  Commonly utilized indices include the one-year and 
five-year Constant Maturity Treasury (CMT) rates, the three-month 
Treasury Bill rate, the 180-day Treasury Bill rate, rates on longer-
term Treasury securities, the National Median Cost of Funds (COFI), 
the one-month or three-month London Interbank Offered Rate (LIBOR), 
the prime rate of a specific bank, or commercial paper rates.  Some 
indices, such as the one-year CMT rate, closely mirror changes in 
market interest rate levels.  Others tend to lag changes in market 
rate levels and tend to be somewhat less volatile.
    

	Caps and Floors.  The underlying mortgages which collateralize 
the ARMS, CMOs and REMICs in which the Fund invests may have caps and 
floors which limit the maximum amount by which the loan rate to the 
residential borrower may change up or down:  (1) per reset or 
adjustment interval and (2) over the life of the loan.  Some 
residential mortgage loans restrict periodic adjustments by limiting 
changes in the borrower's monthly principal and interest payments 
rather than limiting interest rate changes.  These payment caps may 
result in negative amortization.

	The value of mortgage securities in which the Fund invests may 
be affected if market interest rates rise or fall faster and farther 
than the allowable caps or floors on the underlying residential 
mortgage loans.  An example of the effect of caps and floors on a 
residential mortgage loan may be found in the Statement of Additional 
Information.  Additionally, even though the interest rates on the 
underlying residential mortgages are adjustable, amortization and 
prepayments may occur, thereby causing the effective maturities of 
the mortgage securities in which the Fund invests to be shorter than 
the maturities stated in the underlying mortgages.

	Repurchase Agreements.  Repurchase agreements are arrangements 
in which banks, broker/dealers, and other recognized financial 
institutions sell U.S government securities or other securities to 
the Fund and agree at the time of sale to repurchase them at a 
mutually agreed upon time and price within one year from the date of 
acquisition.  To the extent that the original seller does not 
repurchase the securities from the Fund, the Fund could receive less 
than the repurchase price on any sale of such securities.

	Reverse Repurchase Agreements.  The Fund may borrow funds for 
temporary purposes by entering into reverse repurchase agreements in 
accordance with the investment restrictions described below.  
Pursuant to such agreements, the Fund would sell portfolio securities 
to financial institutions and agree to repurchase them at an agreed 
upon date and price.  The Fund would consider entering into reverse 
repurchase agreements to avoid otherwise selling securities during 
unfavorable market conditions.  Reverse repurchase agreements involve 
the risk that the market value of the portfolio securities sold by 
the Fund may decline below the price of the securities the Fund is 
obligated to repurchase.

	Dollar Roll Transactions.  In order to enhance portfolio returns 
and manage prepayment risks, the Fund may engage in dollar roll 
transactions with respect to mortgage securities issued by GNMA, FNMA 
and FHLMC.  In a dollar roll transaction, the Fund sells a mortgage 
security to a financial institution, such as a bank or broker/dealer, 
and simultaneously agrees to repurchase a substantially similar (same 
type, coupon, and maturity) security from the institution at a later 
date at an agreed upon price.  The mortgage securities that are 
repurchased will bear the same interest rate as those sold, but 
generally will be collateralized by different pools of mortgages with 
different prepayment histories.  During the period between the sale 
and repurchase, the Fund will not be entitled to receive interest and 
principal payments on the securities sold.  Proceeds of the sale will 
be invested in short-term instruments, and the income from these 
investments, together with any additional fee income received on the 
sale, will generate income for the Fund exceeding the yield.  When 
the Fund enters into a dollar roll transaction, liquid assets of the 
Fund, in a dollar amount sufficient to make payment for the 
obligations to be repurchased, are segregated at the trade date.  
These assets are marked to market daily and are maintained until the 
transaction is settled.

	Hedging Transactions.  To assist in reducing fluctuations in net 
asset value, the Fund may from time to time engage in certain hedging 
transactions involving exchange traded options or futures and the 
short sale of these securities and other acceptable investments of 
the Fund to the extent that such transactions are in conformity with 
applicable laws, rules and regulations.  Although the use of hedging 
strategies is intended to reduce the Fund's exposure to interest rate 
volatility, it may cause some fluctuation in net asset value.

	Illiquid Securities.  The Fund will not knowingly invest more 
than 15% of the value of its total net assets in illiquid securities, 
including time deposits and repurchase agreements having maturities 
longer than seven days.  Securities that have readily available 
market quotations are not deemed illiquid for purposes of this 
limitation (irrespective of any legal or contractual restrictions on 
resale).  The Fund may invest in commercial obligations issued in 
reliance on the so-called "private placement" exemption from 
registration afforded by Section 4(2) of the Securities Act of 1933, 
as amended ("Section 4(2) paper").  The Fund may also purchase 
securities that are not registered under the Securities Act of 1933, 
as amended, but which can be sold to qualified institutional buyers 
in accordance with Rule 144A under that Act ("Rule 144A securities").  
Section 4(2) paper is restricted as to disposition under the federal 
securities laws, and generally is sold to institutional investors 
such as the Fund who agree that they are purchasing the paper for 
investment and not with a view to public distribution.  Any resale by 
the purchaser must be in an exempt transaction.  Section 4(2) paper 
normally is resold to other institutional investors like the Fund 
through or with the assistance of the issuer or investment dealers 
who make a market in the Section 4(2) paper, thus providing 
liquidity.  Rule 144A securities generally must be sold to other 
qualified institutional buyers.  If a particular investment in 
Section 4(2) paper or Rule 144A securities is not determined to be 
liquid, that investment will be included within the 15% limitation on 
investment in illiquid securities.  The ability to sell Rule 144A 
securities to qualified institutional buyers is a recent development 
and it is not possible to predict how this market will mature. 

	When-Issued Securities.  The Fund may also purchase securities 
on a "when-issued" basis.  When-issued securities are securities 
purchased for delivery beyond the normal settlement date at a stated 
price and yield.  The Fund will generally not pay for such securities 
or start earning interest on them until they are received.  
Securities purchased on a when-issued basis are recorded as an asset 
and are subject to changes in value based upon changes in the general 
level of interest rates.  The Fund expects that commitments to 
purchase when-issued securities will not exceed 25% of the value of 
its total assets absent unusual market conditions.  The Fund does not 
intend to purchase when-issued securities for speculative purposes 
but only in furtherance of its investment objective. 

	Lending of Portfolio Securities.  In order to generate 
additional income, the Fund may lend portfolio securities up to one-
third of the value of its total assets to broker/dealers, banks, or 
other institutional borrowers of securities.  The Fund will only 
enter into loan arrangements with broker/dealers, banks, or other 
institutions which the Investment Adviser has determined are 
creditworthy under guidelines established by the Fund's Board of 
Trustees and will receive collateral in the form of cash or U.S. 
government securities equal to at least 100% of the value of the 
securities loaned.

   
	Temporary Defensive Positions.  When maintaining a temporary 
defensive position, the Fund may invest its assets, without limit, in 
commercial paper and other short-term corporate obligations.  The 
Fund's investment in commercial paper or corporate obligations will 
be limited to securities with one year or less remaining to maturity 
and rated A-1 by S&P Corporation or P-1 by Moody's Investor Service, 
Inc.
    
   
	Portfolio Turnover.  Although the Fund does not intend to invest 
for the purpose of seeking short-term profits, securities in its 
portfolio will be sold whenever the Fund's Investment Adviser 
believes it is appropriate to do so in light of the Fund's investment 
objective, without regard to the length of time a particular security 
may have been held.
    

Investment Limitations

	The Fund's investment objective and the policies described above 
are not fundamental and may be changed by the Trust's Board of 
Trustees without a vote of shareholders.  If there is a change in the 
investment objective, shareholders should consider whether the Fund 
remains an appropriate investment in light of their then current 
financial position and needs.  The Fund's investment limitations 
summarized below may not be changed without the affirmative vote of 
the holders of a majority of its outstanding shares.  There can be no 
assurance that the Fund will achieve its investment objective.  (A 
complete list of the investment limitations that cannot be changed 
without a vote of shareholders is contained in the Statement of 
Additional Information under "Investment Objective and Policies.") 

The Fund may not:

	1.	Borrow money, except that the Fund may (i) borrow money 
for temporary or emergency purposes (not for leveraging or 
investment) and (ii) engage in reverse repurchase agreements or 
dollar roll transactions for any purpose; provided that (i) and (ii) 
in combination do not exceed one-third of the value of the Fund's 
total assets (including the amount borrowed) less liabilities (other 
than borrowings).

	2.	Purchase any securities which would cause 25% or more of 
the value of its total assets at the time of purchase to be invested 
in the securities of issuers conducting their principal business 
activities in the same industry, provided that there is no limitation 
with respect to investments in U.S. government obligations and 
obligations of domestic banks. 

PURCHASE AND REDEMPTION OF SHARES

Purchase Procedures

	Purchases of Fund shares must be made through a brokerage 
account maintained through Lehman Brothers Inc. ("Lehman Brothers") 
or a broker that clears securities transactions through Lehman 
Brothers on a fully disclosed basis (an "Introducing Broker").  The 
Fund reserves the right to reject any purchase order and to suspend 
the offering of shares for a period of time.

	The minimum initial investment in the Fund is $5,000 and the 
minimum subsequent investment is $1,000, except for purchases through 
(a) Individual Retirement Accounts ("IRAs") and Self-Employed 
Retirement Plans, for which the minimum initial and subsequent 
investments are $1,000 and $500, respectively, and (b) retirement 
plans qualified under Section 403(b)(7) of the Internal Revenue Code 
of 1986, as amended (the "Code"), for which the minimum and 
subsequent investment is $500.  There are no minimum investment 
requirements for employees of Lehman Brothers.  The Fund reserves the 
right at any time to vary the initial and subsequent investment 
minimums.  No certificates are issued for Fund shares.

	The Fund's shares are sold continuously at their net asset value 
next determined after a purchase order is received by Lehman Brothers 
or an Introducing Broker.  Payment for Fund shares is generally due 
to Lehman Brothers or an Introducing Broker on the fifth business day 
after the trade date.  Purchase orders received by Lehman Brothers or 
an Introducing Broker prior to the close of regular trading on the 
NYSE, currently 4:00 p.m., Eastern time, on any day that the Fund 
calculates its net asset value, are priced according to the net asset 
value determined on that day.  Purchase orders received after the 
close of regular trading on the NYSE are priced as of the time the 
net asset value per share is next determined.  Shares purchased begin 
to accrue income dividends on the next business day following the day 
that the purchase order is settled.

Valuation of Shares 

	The Fund's net asset value per share for purposes of pricing 
purchase and redemption orders is determined by the Fund's 
Administrator as of 4:00 p.m., Eastern time, on each weekday, with 
the exception of those holidays on which either the New York Stock 
Exchange or the Federal Reserve Bank of Boston is closed.  Currently, 
one or both of these institutions are closed on the customary 
national business holidays of New Year's Day, Martin Luther King, Jr. 
Day, Presidents' Day, Good Friday, Memorial Day (observed), 
Independence Day (observed), Labor Day, Columbus Day, Veterans Day, 
Thanksgiving Day and Christmas Day.  The net asset value per share of 
Fund shares is calculated by adding the value of all securities and 
other assets of the Fund, subtracting liabilities, and dividing the 
result by the total number of the Fund's outstanding shares 
(irrespective of class or sub-class).  The Fund's net asset value per 
share for purposes of pricing purchase and redemption orders is 
determined independently of the net asset value of the Trust's other 
investment portfolios. 

Redemption Procedures

	Shareholders may redeem their shares without charge on any day 
the Fund calculates its net asset value.  See "Valuation of Shares."  
Redemption requests received in proper form prior to the close of 
regular trading on the NYSE are priced at the net asset value per 
share determined on that day.  Redemption requests received after the 
close of regular trading on the NYSE are priced at the net asset 
value as next determined.  The Fund normally transmits redemption 
proceeds for credit to the shareholder's account at Lehman Brothers 
or the Introducing Broker on the fifth business day following receipt 
of a redemption request.  Generally, these funds will not be invested 
for the shareholder's benefit without specific instruction, and 
Lehman Brothers or the Introducing Broker will benefit from the use 
of temporarily uninvested funds.  A shareholder who pays for Fund 
shares by personal check will be credited with the proceeds of a 
redemption of those shares only after the purchase check has been 
collected, which may take up to 15 days or more.  A shareholder who 
anticipates the need for more immediate access to his or her 
investment should purchase shares with federal funds by bank wire or 
with a certified or cashier's check.

	A Fund account that is reduced by a shareholder to a value of 
$1,000 or less ($500 for IRAs and Self-Employed Retirement Plans) may 
be subject to redemption by that Fund, but only after the shareholder 
has been given at least 60 days in which to increase the account 
balance to more than $1,000 ($500 for IRAs and Self-Employed 
Retirement Plans).  In addition, the Fund may redeem shares 
involuntarily or suspend the right of redemption as permitted under 
the 1940 Act, as described in the Statement of Additional Information 
under "Additional Purchase and Redemption Information."

Fund shares may be redeemed in one of the following ways:

Redemption Through Lehman Brothers

	Redemption requests may be made through Lehman Brothers or an 
Introducing Broker.

Redemption By Mail

	Shares may be redeemed by submitting a written request for 
redemption to:

	Lehman Brothers Funds
	c/o The Shareholder Services Group, Inc.
	P.O. Box 9134
	Boston, Massachusetts  02205-9134

	A written redemption request to the Fund's Transfer Agent  must 
(a) state the number of shares to be redeemed, (b) indicate the name 
of the Fund from which such shares are to be redeemed, (C) identify 
the shareholder's account number and (d) be signed by each registered 
owner exactly as the shares are registered.  Any signature appearing 
on a redemption request must be guaranteed by a domestic bank, a 
savings and loan institution, a domestic credit union, a member bank 
of the Federal Reserve System or a member firm of a national 
securities exchange.  The Fund's Transfer Agent may require 
additional supporting documents for redemptions made by corporations, 
executors, administrators, trustees and guardians.  A redemption 
request will not be deemed to be properly received until the Fund's 
Transfer Agent receives all required documents in proper form.  The 
Shareholder Services Group, Inc., a subsidiary of First Data 
Corporation, is located at One Exchange Place, Boston, Massachusetts 
02109 and serves as the Fund's Transfer Agent.

Exchange Privilege
   
	Shares of the Fund may be exchanged without charge for shares of 
the Lehman Brothers U.S. Government Floating Rate Fund - Premier 
Shares, the Lehman Brothers Daily Income Fund and the Lehman Brothers 
Municipal Income Fund.  Before engaging in an exchange transaction, a 
shareholder should read carefully the portions of the Prospectus 
describing the Fund into which the exchange will occur.  An exchange 
is treated as a sale of a security for tax purposes on which a gain 
or loss may be recognized.
    
DIVIDENDS

	The Fund declares dividends from its net investment income on 
each day the Fund is open for business and pays dividends monthly.  
Distributions of net realized long-term capital gains, if any, are 
declared and paid annually.  Unless a shareholder instructs the Fund 
to pay dividends or capital gains distributions in cash and credit 
them to the shareholder's account at Lehman Brothers, dividends and 
distributions from the Fund will be reinvested automatically in 
additional shares of the Fund at net asset value.  Shares redeemed 
during the month are entitled to dividends and distributions declared 
up to and including the date of redemption.

TAXES

	The Fund intends to qualify each year as a "regulated investment 
company" under the Internal Revenue Code of 1986, as amended (the 
"Code").  A regulated investment company is exempt from Federal 
income tax on amounts distributed to its shareholders. 

	For Federal income tax purposes, dividends of net ordinary 
income and distributions of any net realized short-term capital gain, 
whether paid in cash or reinvested in shares of the Fund, are taxable 
to shareholders as ordinary income.  Distributions of net realized 
long-term capital gains, whether paid in cash or reinvested in shares 
of the Fund, are taxable to shareholders as long-term capital gains, 
irrespective of the length of time the shareholder had held his Fund 
shares.  (Federal income taxes for distributions to an IRA or a 
qualified retirement plan are deferred under the Code.)  It is 
anticipated that none of the Fund's distributions will be eligible 
for the dividends received deduction for corporations.

	Dividends declared in October, November or December of any year 
payable to shareholders of record on a specified date in such months 
will be deemed to have been received by the shareholders and paid by 
the Fund on December 31 of such year in the event such dividends are 
actually paid during January of the following year.

	Shareholders will be advised at least annually as to the Federal 
income tax status of distributions made to them each year.

MANAGEMENT OF THE FUND

	The business and affairs of the Fund are managed under the 
direction of the Trust's Board of Trustees.  The Trustees approve all 
significant agreements between the Trust and the persons or companies 
that furnish services to the Fund, including agreements with its 
Distributors, Investment Adviser, Administrator, Custodian and 
Transfer Agent.  The day-to-day operations of the Fund are delegated 
to the Fund's Investment Adviser and Administrator.  One Trustee and 
all of the Trust's officers are affiliated with Lehman Brothers, The 
Boston Company Advisors, Inc. or one of their affiliates.  The 
Statement of Additional Information relating to the Fund contains 
general background information regarding each Trustee and executive 
officer of the Trust. 

Investment Adviser-Lehman Brothers Global Asset Management Inc.

	Lehman Brothers Global Asset Management Inc. ("LBGAM"), located 
at 3 World Financial Center, New York, New York 10285, serves as the 
Fund's Investment Adviser.  LBGAM is a wholly owned subsidiary of 
Lehman Brothers Holdings Inc. ("Holdings").  All of the issued and 
outstanding common stock (representing 92% of the voting stock) of 
Holdings is held by American Express Company.  LBGAM, together with 
other Lehman Brothers investment advisory affiliates, serves as 
investment adviser to investment companies and private accounts and 
has assets under management in excess of $13 billion. 

   
	As Investment Adviser to the Fund, LBGAM manages the Fund's 
portfolio in accordance with its investment objective and policies, 
makes investment decisions for the Fund, places orders to purchase 
and sell securities and employs professional portfolio managers and 
securities analysts who provide research services to the Fund.  For 
its services LBGAM is entitled to a monthly fee by the Fund at the 
annual rate of .30% of the value of the Fund's average daily net 
assets.
    

	Kirk D. Hartman, a Managing Director of LBGAM, has been 
associated with Lehman Brothers in the Mortgage Department since 
1987.  Mr. Hartman is the portfolio manager primarily responsible for 
managing the day-to-day operations of the Fund, including the making 
of investment selections.  Mr. Hartman will be assisted by Andrew J. 
Stenwall, a Vice President of LBGAM.  Mr. Hartman will manage the 
Fund as of commencement of operations.

Administrator-The Boston Company Advisors, Inc.
   
	The Boston Company Advisors, Inc. ("Boston Advisors"), located 
at One Exchange Place, Boston, Massachusetts 02109, serves as the 
Fund's Administrator.  Boston Advisors is a wholly owned subsidiary 
of The Boston Company, Inc., which is in turn a wholly owned 
subsidiary of Boston Group Holdings, Inc. ("BGH").  BGH is a wholly 
owned subsidiary of Mellon Bank Corporation.  As Administrator, 
Boston Advisors calculates the net asset value of the Fund's shares 
and generally assists in all aspects of the Fund's administration and 
operation.  As compensation for its services as Administrator, Boston 
Advisors is entitled to a monthly fee at the annual rate of .10% of 
the value of the Fund's average daily net assets. 
    

Distributors

	Lehman Brothers, located at 3 World Financial Center, New York, 
New York 10285, is a Distributor of the Fund.  Lehman Brothers, a 
wholly owned subsidiary of Holdings, is one of the leading full-line 
investment firms serving the U.S. and foreign securities and 
commodities markets.  American Express Company and its subsidiaries, 
other than Lehman Brothers, are principally engaged in the businesses 
of providing travel-related services, investment services, 
information services, international banking services and investors' 
diversified financial services.  Funds Distributor Inc., a wholly 
owned subsidiary of Lehman Brothers located at One Exchange Place, 
Boston, Massachusetts 02109, also serves as a distributor of the 
Fund.  

Shareholder Services
   
	Under a Plan of Distribution adopted pursuant to Rule 12b-1 
under the 1940 Act, Premier Shares bear fees ("Rule 12b-1 fees") 
payable by the Fund at the aggregate rate of up to .50% (on an 
annualized basis) of the average daily net asset value of such shares 
to Lehman Brothers to support the costs of distributing Premier 
Shares and for services it provides to the beneficial owners of 
Premier Shares.  The Plan of Distribution also allows Lehman Brothers 
to use its own resources to provide distribution services and 
shareholder services.  The latter services include providing 
information periodically to shareholders concerning their investment 
in Premier Shares; responding to inquiries from shareholders 
concerning the Fund and their investment in Premier Shares; assisting 
in effecting purchase and redemption transactions; and providing such 
other similar services as may be reasonably requested by shareholders 
or the Fund.  Premier Shares are identical in all respects to shares 
of other classes except that they bear the fees described above and 
enjoy certain exclusive voting rights on matters relating to these 
fees.
    

Expenses
   
	The Fund bears all its own expenses.  The Fund's expenses 
include taxes, interest, fees and salaries of the Trust's trustees 
and officers who are not directors, officers or employees of the 
Fund's service contractors, Securities and Exchange Commission fees, 
state securities qualification fees, costs of preparing and printing 
prospectuses for regulatory purposes and for distribution to 
shareholders, advisory and administration fees, charges of the 
custodian, transfer agent and dividend disbursing agent, certain 
insurance premiums, outside auditing and legal expenses, costs of 
shareholder reports and shareholder meetings and any extraordinary 
expenses.  The Fund also pays for brokerage fees and commissions (if 
any) in connection with the purchase and sale of portfolio 
securities.  In order to maintain a competitive expense ratio, LBGAM 
has agreed voluntarily to waive its fee or to reimburse the Fund if 
and to the extent that the Fund's total operating expenses exceed 
.90% of average daily net assets.  This voluntary waiver and 
reimbursement will not be changed unless shareholders are provided at 
least 60 days' advance notice.  In addition, the Investment Adviser 
has agreed to reimburse the Fund to the extent required by applicable 
state law for certain expenses that are described in the Statement of 
Additional Information relating to the Fund.  Any fees charged by 
institutional investors to their customers in connection with 
investments in Fund Shares are not reflected in the Fund's expenses.
    

PERFORMANCE INFORMATION
   
	From time to time, in advertisements or in reports to 
shareholders, the "total return," "yields" and "effective yields" for 
shares may be quoted.  Total return and yield quotations are computed 
separately for each class of shares.  "Total return" for a particular 
class of shares represents the change, over a specified period of 
time, in the value of an investment in the shares after reinvesting 
all income and capital gain distributions.  It is calculated by 
dividing that change by the initial investment and is expressed as a 
percentage.  The "yield" quoted in advertisements for a particular 
class of shares refers to the income generated by an investment in 
such shares over a specified period (such as a 30-day period) 
identified in the advertisement.  This income is then "annualized;" 
that is, the amount of income generated by the investment during that 
period is assumed to be generated each such period over a 52-week or 
one-year period and is shown as a percentage of the investment.  The 
"effective yield" is calculated similarly but, when annualized, the 
income earned by an investment in a particular class is assumed to be 
reinvested.  The "effective yield" will be slightly higher than the 
"yield" because of the compounding effect of this assumed 
reinvestment. 
    
   
	Distribution rates may also be quoted for the Fund.  Quotations 
of distribution rates are calculated by annualizing the most recent 
distribution of net investment income for a monthly, quarterly or 
other relevant period and dividing this amount by the ending net 
asset value for the period for which the distribution rates are being 
calculated.
    
   
	The Fund's performance may be compared to that of other mutual 
funds with similar objectives, to stock or other relevant indices, or 
to rankings prepared by independent services or other financial or 
industry publications that monitor the performance of mutual funds.  
For example, such data are reported in national financial 
publications such as Morningstar, Inc., Barron's, IBC/Donoghue's Inc. 
Bond Fund Report, The Wall Street Journal and The New York Times, 
reports prepared by Lipper Analytical Services, Inc. and publications 
of a local or regional nature.  The Fund's Lipper ranking in the 
"Short (1-5 Years) U.S. Government Funds" or "General U.S. Government 
Funds" categories may also be quoted from time to time in advertising 
and sales literature.
    

	The Fund's total return and yield figures for a class of shares 
represent past performance, will fluctuate and should not be 
considered as representative of future results.  The performance of 
any investment is generally a function of portfolio quality and 
maturity, type of investment and operating expenses.  The methods 
used to compute the Fund's total return and yields are described in 
more detail in the Statement of Additional Information.  Current 
performance information maybe obtained through a Lehman Brothers 
Investment Representative.

DESCRIPTION OF SHARES

	The Trust is a Massachusetts business trust established on 
November 25, 1992.  The Trust's Declaration of Trust authorizes the 
Board of Trustees to issue an unlimited number of full and fractional 
shares of beneficial interest in the Trust and to classify or 
reclassify any unissued shares into one or more additional classes of 
shares.  The Declaration of Trust further authorizes the Trustees to 
classify or reclassify any class of shares into one or more 
sub-classes.  The issuance of separate classes of shares is intended 
to address the different service needs of different types of 
investors.  Each share represents interests in each Fund in 
proportion to each share's net asset value, except that shares of 
certain classes bear fees and expenses for certain shareholder 
services or distribution and support services provided to that class.

	As a Massachusetts business trust, the Trust is not required to 
hold annual meetings of shareholders.  However, the Trust will call a 
meeting of shareholders where required by law for purposes such as 
voting upon the question of removal of a member of the Board of 
Trustees upon written request of shareholders owning at least 10% of 
the outstanding shares of the Trust entitled to vote.  Shareholders 
of the Trust are entitled to one vote for each full share held 
(irrespective of class or portfolio) and fractional votes for 
fractional shares held. 

   
	In addition to Premier Shares, the Fund currently offers 
Institutional Shares and Select Shares.  Institutional Shares are 
sold to institutions that have not entered into servicing or other 
agreements with the Fund in connection with their investments and pay 
no Rule 12b-1 distribution or shareholder service fee.  Select Shares 
of the Fund are sold under a Plan of Distribution adopted pursuant to 
Rule 12b-1 to institutional investors and bear fees payable at a rate 
not exceeding .35% (on an annualized basis) of the average daily net 
asset value of the shares beneficially owned by such investors in 
return for certain administrative and shareholder services provided 
by Lehman Brothers or the institutional investors.  These services 
may include processing purchase, exchange and redemption requests 
from shareholders and placing orders with the Transfer Agent; 
processing dividend and distribution payments from the Funds on 
behalf of shareholders; providing information periodically to 
shareholders showing their positions in shares; responding to 
inquiries from shareholders concerning their investment in shares; 
arranging for bank wires; and providing such other similar services 
as may be reasonably requested.  Select Shares will bear all fees 
paid for services provided to that class under the Plan of 
Distribution.
    



No person has been authorized to give any information or to make any 
representations not contained in this Prospectus, or in the Fund's 
Statement of Additional Information incorporated herein by reference, 
in connection with the offering made by this Prospectus and, if given 
or made, such information or representations must not be relied upon 
as having been authorized by the Trust or its distributors. This 
Prospectus does not constitute an offering by the Trust or by the 
distributors in any jurisdiction in which such offering may not 
lawfully be made.

_________



TABLE OF CONTENTS

[CAPTION]

Page

	Background and Expense Information
2

	Investment Objective and Policies
3

	Purchase and Redemption of Shares
8

	Dividends
10

	Taxes
11

	Management of the Fund
11

	Performance Information
13

   Description of Shares
14






Lehman Brothers
Short Duration U.S. Government Fund

__________

PROSPECTUS

   
February 21, 1994
    
__________

           
LEHMAN BROTHERS

	THIS PROSPECTUS AND THE STATEMENT OF ADDITIONAL INFORMATION 
INCORPORATED HEREIN RELATE PRIMARILY TO THE FUND AND DESCRIBE ONLY 
THE INVESTMENT OBJECTIVE AND POLICIES, OPERATIONS, CONTRACTS AND 
OTHER MATTERS RELATING TO THE FUND.  INVESTORS WISHING TO OBTAIN 
SIMILAR INFORMATION REGARDING THE TRUST'S OTHER PORTFOLIOS MAY OBTAIN 
SEPARATE PROSPECTUSES DESCRIBING THEM BY CONTACTING LEHMAN BROTHERS 
AT 1-800-368-5556. 


<PAGE>
   
                                LEHMAN BROTHERS
                       FLOATING RATE U.S. GOVERNMENT FUND
    
 
                       An Investment Portfolio Offered By
                Lehman Brothers Institutional Funds Group Trust
 
   
    Lehman  Brothers  Institutional  Funds  Group  Trust  (the  "Trust")  is  an
open-end, management investment company. The shares described in this Prospectus
represent interests  in  a  class  of shares  ("Institutional  Shares")  of  the
Floating  Rate  U.S.  Government  Fund (the  "Fund"),  a  diversified investment
portfolio of  the  Trust.  Fund  shares may  not  be  purchased  by  individuals
directly,   but  institutional  investors  may   purchase  shares  for  accounts
maintained by individuals.
    
 
    The Fund's INVESTMENT OBJECTIVE is to provide a high level of current income
consistent with  minimal  fluctuation  of  net asset  value.  The  Fund  invests
primarily  in a portfolio  consisting of U.S.  government and agency securities,
including floating rate and adjustable rate mortgage securities, and  repurchase
agreements collateralized by such obligations.
 
   
    LEHMAN  BROTHERS  INC. sponsors  the  Fund and  acts  as Distributor  of its
shares. LEHMAN  BROTHERS  GLOBAL ASSET  MANAGEMENT  INC. serves  as  the  Fund's
Investment Adviser.
    
 
    The  address of the Fund is One Exchange Place, Boston, Massachusetts 02109.
The Fund can be  contacted as follows: FOR  PURCHASE AND REDEMPTION ORDERS  ONLY
CALL  1-800-851-3134;  for  yield  information  call  1-800-238-2560;  for other
information call 1-800-368-5556.
 
   
    This Prospectus briefly sets forth  certain information about the Fund  that
investors  should  know before  investing. Investors  are  advised to  read this
Prospectus and retain it for future reference. Additional information about  the
Fund,  contained in  a Statement  of Additional  Information dated  February 21,
1994, as amended  or supplemented from  time to  time, has been  filed with  the
Securities  and Exchange Commission and is available to investors without charge
by calling the Fund's Distributor at 1-800-368-5556. The Statement of Additional
Information is incorporated in its entirety by reference into this Prospectus.
    
 
    SHARES OF THE  FUND ARE  NOT DEPOSITS OR  OBLIGATIONS OF,  OR GUARANTEED  OR
ENDORSED  BY, ANY BANK, AND SUCH SHARES ARE NOT FEDERALLY INSURED BY THE FEDERAL
DEPOSIT INSURANCE CORPORATION, THE FEDERAL RESERVE BOARD OR ANY OTHER GOVERNMENT
AGENCY. SHARES  OF THE  FUND  INVOLVE CERTAIN  INVESTMENT RISKS,  INCLUDING  THE
POSSIBLE LOSS OF PRINCIPAL.
 
                            ------------------------
 
THESE  SECURITIES  HAVE  NOT  BEEN APPROVED  OR  DISAPPROVED  BY  THE SECURITIES
    AND   EXCHANGE   COMMISSION   OR   ANY   STATE   SECURITIES   COMMISSION
       NOR  HAS  THE  SECURITIES  AND EXCHANGE  COMMISSION  OR  ANY STATE
           SECURITIES  COMMISSION   PASSED  UPON   THE  ACCURACY   OR
               ADEQUACY  OF  THIS PROSPECTUS.  ANY REPRESENTATION
                      TO THE CONTRARY IS A CRIMINAL OFFENSE.
 
                            ------------------------
 
                                LEHMAN BROTHERS
 
   
February 21, 1994
    
<PAGE>
                       BACKGROUND AND EXPENSE INFORMATION
 
   
    The  Fund currently  offers three  separate classes  of shares,  only one of
which,  Institutional  Shares,  is  offered  by  this  Prospectus.  Each   class
represents  an equal, PRO  RATA interest in  the Fund. Each  share accrues daily
dividends in the same manner, except that the shares of other classes bear  fees
allocable to services provided to the beneficial owners of such shares.
    
 
    The purpose of the following table is to assist an investor in understanding
the  various costs and expenses that an investor in the Fund would bear directly
or indirectly. For more complete descriptions of the various costs and expenses,
see "Management of the Fund" in this Prospectus and the Statement of  Additional
Information.
 
                                EXPENSE SUMMARY
 

                                                                  
ANNUAL FUND OPERATING EXPENSES
 (as a percentage of average net assets)
    Advisory Fees (after waivers)................................    .17%
    Rule 12b-1 fees..............................................   none
    Other Expenses -- including Administration Fees..............    .23
                                                                    ----
    Total Fund Operating Expenses (after expense
     reimbursement)..............................................    .40
                                                                    ----
                                                                    ----

 
- ---------
 

[CAPTION]
 EXAMPLE
                                                         
 You  would pay the following  expenses on a $1,000
 investment, assuming (1)  a 5%  annual return  and
 (2) redemption at the end of each time period with
 respect to the following shares:
 
[CAPTION]
                                                      1 YEAR   3 YEARS
                                                      ------   -------
                                                         
                                                      $   4    $   13

 
THE  FOREGOING SHOULD NOT BE CONSIDERED  A REPRESENTATION OF ACTUAL EXPENSES AND
RATE OF RETURN, WHICH MAY BE GREATER OR LESSER THAN THOSE SHOWN.
 
   
    The Fund's Investment  Adviser has voluntarily  agreed to waive  its fee  or
reimburse  the Fund  to the extent  necessary to maintain  the Fund's annualized
expense ratio at .40%. The voluntary waiver or reimbursement will not be changed
unless shareholders are provided at least 60 days' advance notice. In  addition,
the  Administrator may waive a portion of its fee which will assist in achieving
this expense ratio. Absent waivers  or reimbursement of expenses, Advisory  Fees
with  respect to  Institutional Shares  would be  .30% annually,  Other Expenses
would be .25% annually and the Total  Fund Operating Expenses would be .60%,  of
the Fund's average daily net assets. The foregoing table has not been audited by
the Fund's independent accountants.
    
 
                       INVESTMENT OBJECTIVE AND POLICIES
 
    The  investment objective of the Fund is  to provide a high level of current
income consistent with minimal  fluctuation of net  asset value. Current  income
includes, in general, discount earned on U.S. Treasury bills and agency discount
notes,  interest earned on mortgage-related securities and other U.S. government
and agency  securities, and  short-term capital  gains. While  there can  be  no
assurance  that the  Fund will  be able to  maintain minimal  fluctuation of net
asset value or that it will achieve its investment objective, the Fund endeavors
to do so by following the investment policies described in this Prospectus.
 
                                       2
<PAGE>
   
    The Fund  pursues  its investment  objective  by investing  primarily  in  a
professionally  managed  portfolio  of  adjustable rate  or  floating  rate U.S.
government and agency securities which are issued or guaranteed as to payment of
principal   and   interest   by   the   U.S.   government,   its   agencies   or
instrumentalities.  As a mutual fund with "Floating Rate U.S. Government" in its
name, under normal market conditions, the Fund  must invest at least 65% of  its
portfolio in such instruments.
    
 
DURATION
 
   
    Under normal interest rate conditions, the Fund's average portfolio duration
will  be  between  that  of  a  six-month  and  a  one-year  U.S.  Treasury Bill
(approximately 0.5 to  one-year). This  means that  the Fund's  net asset  value
fluctuation  is expected to  be similar to  the price fluctuation  of a one-year
U.S. Treasury Bill.  The Fund's average  portfolio duration is  not expected  to
exceed  that  of a  two-year U.S.  Treasury Note  (approximately 1.9  years). In
computing the average  duration of  its portfolio,  the Fund  will estimate  the
duration  of obligations  that are  subject to  prepayment or  redemption by the
issuer, taking into account the influence  of interest rates on prepayments  and
coupon  flows. Maturity, in  contrast to duration, measures  only the time until
final payment is due on an investment; it does not take into account the pattern
of a security's  cash flow over  time, including  how cash flow  is affected  by
prepayments and by changes in interest rates.
    
 
   
ACCEPTABLE INVESTMENTS
    
    The  types of mortgage securities  in which the Fund  may invest include the
following:
 
        - adjustable rate mortgage securities;
 
        - collateralized mortgage obligations;
 
        - real estate mortgage investment conduits; and
 
        -other securities collateralized  by or representing  interests in  real
         estate  mortgages whose interest rates  reset at periodic intervals and
         are issued  or  guaranteed by  the  U.S. government,  its  agencies  or
         instrumentalities.
 
    In  addition to the securities described above,  the Fund may also invest in
direct obligations of the U.S. Treasury, such as U.S. Treasury bills, notes, and
bonds, as well as obligations  of U.S. government agencies or  instrumentalities
which are not collateralized by or represent interests in real estate mortgages.
 
    The  Fund may also invest in mortgage-related securities which are issued by
private entities such as investment banking  firms and companies related to  the
construction industry. The privately issued mortgage-related securities in which
the Fund may invest include:
 
        -privately  issued  securities  which  are  collateralized  by  pools of
         mortgages in  which  each  mortgage  is guaranteed  as  to  payment  of
         principal  and interest  by an  agency or  instrumentality of  the U.S.
         government;
 
        -privately issued  securities  which  are  collateralized  by  pools  of
         mortgages  in which payment of principal and interest are guaranteed by
         the issuer  and such  guarantee is  collateralized by  U.S.  government
         securities; and
 
        -other privately issued securities in which the proceeds of the issuance
         are invested in mortgage-backed securities and payment of the principal
         and   interest  are   supported  by  the   credit  of   any  agency  or
         instrumentality of the U.S. government.
 
                                       3
<PAGE>
    The privately  issued mortgage-related  securities  provide for  a  periodic
payment consisting of both interest and principal. The interest portion of these
payments will be distributed by the Fund as income, and the capital portion will
be reinvested.
 
   
    ADJUSTABLE  RATE  MORTGAGE  SECURITIES  ("ARMS").    ARMS  are  pass-through
mortgage securities with adjustable rather  than fixed interest rates. The  ARMS
in which the Fund invests are issued by Government National Mortgage Association
("GNMA"),  Federal National Mortgage Association  ("FNMA") and Federal Home Loan
Corporation ("FHLMC") and  are actively traded.  The underlying mortgages  which
collateralize  ARMS issued by  GNMA are fully guaranteed  by the Federal Housing
Administration  ("FHA")   or  Veterans   Administration  ("VA"),   while   those
collateralizing  ARMS  issued  by  FHLMC  or  FNMA  are  typically  conventional
residential mortgages  conforming  to  strict  underwriting  size  and  maturity
constraints.
    
 
    Unlike conventional bonds, ARMS pay back principal over the life of the ARMS
rather  than at maturity.  Thus, a holder of  the ARMS, such  as the Fund, would
receive monthly scheduled  payments of  principal and interest  and may  receive
unscheduled   principal  payments   representing  payments   on  the  underlying
mortgages. At the time that a holder of the ARMS reinvests the payments and  any
unscheduled  prepayments of principal that it receives, the holder may receive a
rate of interest paid on the existing ARMS. As a consequence, ARMS may be a less
effective means of  "locking in" long-term  interest rates than  other types  of
U.S. government securities.
 
    Not  unlike other U.S. government securities,  the market value of ARMS will
generally vary inversely with changes in market interest rates. Thus, the market
value of ARMS generally  declines when interest rates  rise and generally  rises
when interest rates decline.
 
    While ARMS generally entail less risk of a decline during periods of rapidly
rising  rates, ARMS may  also have less potential  for capital appreciation than
other  similar  investments  (e.g.,  investments  with  comparable   maturities)
because, as interest rates decline, the likelihood increases that mortgages will
be   prepaid.  Furthermore,  if  ARMS  are  purchased  at  a  premium,  mortgage
foreclosures and unscheduled  principal payments may  result in some  loss of  a
holder's  principal investment to the extent of the premium paid. Conversely, if
ARMS are purchased at a discount, both  a scheduled payment of principal and  an
unscheduled prepayment of principal would increase current and total returns and
would  accelerate the  recognition of income,  which would be  taxed as ordinary
income when distributed to shareholders.
 
   
    COLLATERALIZED MORTGAGE  OBLIGATIONS ("CMOS").   CMOs  are bonds  issued  by
single-purpose,   stand-alone  finance  subsidiaries   or  trusts  of  financial
institutions, government agencies, investment banks or companies related to  the
construction industry. CMOs purchased by the Fund may be:
    
 
        -collateralized  by  pools  of  mortgages  in  which  each  mortgage  is
         guaranteed as to  payment of  principal and  interest by  an agency  or
         instrumentality of the U.S. government;
 
        -collateralized  by pools of mortgages in which payment of principal and
         interest  is  guaranteed   by  the   issuer  and   such  guarantee   is
         collateralized by U.S. government securities; or
 
        -securities  in  which  the proceeds  of  the issuance  are  invested in
         mortgage securities  and  payment of  the  principal and  interest  are
         supported  by the  credit of an  agency or instrumentality  of the U.S.
         government.
 
    All CMOs  purchased  by  the  Fund  are investment  grade,  as  rated  by  a
nationally recognized statistical rating organization.
 
                                       4
<PAGE>
    REAL  ESTATE MORTGAGE INVESTMENT CONDUITS  ("REMICS").  REMICs are offerings
of multiple class real estate mortgage-backed securities which qualify and elect
treatment as such  under provisions  of the  Internal Revenue  Code. Issuers  of
REMICs  may  take several  forms,  such as  trusts,  partnerships, corporations,
associations or a segregated pool of mortgages. Once REMIC status is elected and
obtained, the entity is not subject to federal income taxation. Instead,  income
is  passed through  the entity and  is taxed to  the person or  persons who hold
interests in the REMIC. A REMIC interest must consist of one or more classes  of
"regular interests," some of which may offer adjustable rates (the type in which
the  Fund primarily  invests), and  a single  class of  "residual interests". To
qualify as a REMIC,  substantially all of  the assets of the  entity must be  in
assets directly or indirectly secured principally by real property.
 
   
    STRIPPED MORTGAGE-BACKED SECURITIES ("SMBS").  The Fund may invest up to 10%
of   its  total  assets  in  SMBS,  which  are  derivative  multiclass  mortgage
securities. The Fund may only  invest in SMBS issued  or guaranteed by the  U.S.
government,  its agencies or instrumentalities. SMBS are usually structured with
two classes that  receive different  proportions of the  interest and  principal
distributions  from a  pool of  mortgage assets,  which may  consist of mortgage
loans or guaranteed mortgage  pass-through certificates. A  common type of  SMBS
will have one class receiving all or a portion of the interest from the mortgage
assets,  while the other class  will receive all of  the principal. Moreover, in
some instances, one  class will receive  some of  the interest and  most of  the
principal  while  the other  class will  receive  most of  the interest  and the
remainder of the principal. If the underlying mortgage assets experience greater
than anticipated prepayments of principal, there may no longer be interest  paid
on  some of the underlying mortgage loans and the Fund, as a result, may fail to
fully recoup its initial investment in these securities. Although the market for
such securities  is  increasingly  liquid,  certain  SMBS  may  not  be  readily
marketable and will be considered illiquid for purposes of the Fund's limitation
on  investments in illiquid securities. The market value of the class consisting
entirely of principal payments  generally is unusually  sensitive to changes  in
interest  rates. The market  value of the class  consisting entirely of interest
payments is extremely sensitive not only  to changes in interest rates but  also
to  the  rate  of  principal payments,  including  prepayments,  on  the related
underlying mortgage assets. The yields on a  class of SMBS that receives all  or
most  of the interest from mortgage  assets are generally higher than prevailing
market yields  on  other  mortgage-backed securities  because  their  cash  flow
patterns  are  more  variable and  there  is  a greater  risk  that  the initial
investment will  not be  fully recouped.  The Investment  Adviser will  seek  to
manage  these risks (and potential  benefits) by investing in  a variety of such
securities and by using certain hedging techniques.
    
 
OTHER INVESTMENTS AND PRACTICES
 
   
    RESETS.  The interest rates paid on  the ARMS, CMOs and REMICs in which  the
Fund  invests generally are readjusted or reset at intervals of one year or less
to an increment over some predetermined interest rate index. There are two  main
categories of indices: those based on U.S. Treasury securities and those derived
from  a calculated measure, such as a cost of funds index or a moving average of
mortgage rates. Commonly  utilized indices  include the  one-year and  five-year
Constant  Maturity Treasury (CMT) rates, the three-month Treasury Bill rate, the
180-day Treasury  Bill  rate, rates  on  longer term  Treasury  securities,  the
National  Median  Cost  of Funds  (COFI),  the one-month  or  three-month London
Interbank Offered Rate (LIBOR), the prime rate of a specific bank, or commercial
paper rates. Some indices, such as the one-year CMT rate, closely mirror changes
in market interest rate levels. Others tend to lag changes in market rate levels
and tend to be somewhat less volatile.
    
 
    CAPS AND FLOORS.   The  underlying mortgages which  collateralize the  ARMS,
CMOs  and REMICs in which the Fund invests  may have caps and floors which limit
the maximum amount by which the loan rate to the residential borrower may change
up or down: (1) per  reset or adjustment interval and  (2) over the life of  the
loan.
 
                                       5
<PAGE>
Some  residential  mortgage  loans  restrict  periodic  adjustments  by limiting
changes in the borrower's  monthly principal and  interest payments rather  than
limiting  interest  rate  changes. These  payment  caps may  result  in negative
amortization.
 
    The value of mortgage securities in  which the Fund invests may be  affected
if market interest rates rise or fall faster and farther than the allowable caps
or floors on the underlying residential mortgage loans. An example of the effect
of  caps and floors on a residential mortgage loan may be found in the Statement
of Additional Information. Additionally, even  though the interest rates on  the
underlying  residential mortgages  are adjustable,  amortization and prepayments
may occur, thereby causing the  effective maturities of the mortgage  securities
in  which  the Fund  invests to  be shorter  than the  maturities stated  in the
underlying mortgages.
 
    REPURCHASE AGREEMENTS.   Repurchase  agreements  are arrangements  in  which
banks,  broker/dealers,  and other  recognized  financial institutions  sell U.S
government securities or other securities to the  Fund and agree at the time  of
sale to repurchase them at a mutually agreed upon time and price within one year
from  the date of acquisition.  To the extent that  the original seller does not
repurchase the securities from  the Fund, the Fund  could receive less than  the
repurchase price on any sale of such securities.
 
    REVERSE  REPURCHASE AGREEMENTS.   The  Fund may  borrow funds  for temporary
purposes by entering into reverse  repurchase agreements in accordance with  the
investment  restrictions described below. Pursuant  to such agreements, the Fund
would  sell  portfolio  securities  to  financial  institutions  and  agree   to
repurchase  them  at an  agreed upon  date  and price.  The Fund  would consider
entering  into  reverse  repurchase   agreements  to  avoid  otherwise   selling
securities  during unfavorable market  conditions. Reverse repurchase agreements
involve the risk that the market value  of the portfolio securities sold by  the
Fund  may decline  below the price  of the  securities the Fund  is obligated to
repurchase.
 
    DOLLAR ROLL TRANSACTIONS.  In order to enhance portfolio returns and  manage
prepayment  risks, the Fund may engage  in dollar roll transactions with respect
to mortgage  securities  issued  by GNMA,  FNMA  and  FHLMC. In  a  dollar  roll
transaction, the Fund sells a mortgage security to a financial institution, such
as   a  bank  or  broker/dealer,  and  simultaneously  agrees  to  repurchase  a
substantially similar  (same  type,  coupon, and  maturity)  security  from  the
institution  at a later  date at an  agreed upon price.  The mortgage securities
that are  repurchased  will bear  the  same interest  rate  as those  sold,  but
generally  will be collateralized by different pools of mortgages with different
prepayment histories. During  the period  between the sale  and repurchase,  the
Fund  will not  be entitled  to receive interest  and principal  payments on the
securities  sold.  Proceeds  of  the   sale  will  be  invested  in   short-term
instruments, and the income from these investments, together with any additional
fee income received on the sale, will generate income for the Fund exceeding the
yield. When the Fund enters into a dollar roll transaction, liquid assets of the
Fund,  in a dollar amount  sufficient to make payment  for the obligations to be
repurchased, are segregated at the trade date. These assets are marked to market
daily and are maintained until the transaction is settled.
 
    HEDGING TRANSACTIONS.   To  assist  in reducing  fluctuations in  net  asset
value,  the Fund may  from time to  time engage in  certain hedging transactions
involving exchange  traded  options or  futures  and  the short  sale  of  these
securities  and other acceptable investments of the Fund to the extent that such
transactions are  in conformity  with applicable  laws, rules  and  regulations.
Although the use of hedging strategies is intended to reduce the Fund's exposure
to interest rate volatility, it may cause some fluctuation in net asset value.
 
   
    ILLIQUID  SECURITIES.  The Fund  will not knowingly invest  more than 15% of
the value  of  its total  net  assets  in illiquid  securities,  including  time
deposits  and repurchase  agreements having  maturities longer  than seven days.
Securities that have readily available market quotations are not deemed illiquid
for purposes  of  this limitation  (irrespective  of any  legal  or  contractual
restrictions   on  resale).  The  Fund  may  invest  in  commercial  obligations
    
 
                                       6
<PAGE>
issued  in  reliance  on  the  so-called  "private  placement"  exemption   from
registration  afforded by Section 4(2) of the Securities Act of 1933, as amended
("Section 4(2)  paper"). The  Fund may  also purchase  securities that  are  not
registered  under the Securities Act of 1933,  as amended, but which can be sold
to qualified institutional buyers  in accordance with Rule  144A under that  Act
("Rule  144A securities").  Section 4(2) paper  is restricted  as to disposition
under the  federal  securities laws,  and  generally is  sold  to  institutional
investors  such as  the Fund who  agree that  they are purchasing  the paper for
investment and  not  with a  view  to public  distribution.  Any resale  by  the
purchaser  must  be in  an exempt  transaction. Section  4(2) paper  normally is
resold to  other institutional  investors  like the  Fund  through or  with  the
assistance  of the issuer or investment dealers who make a market in the Section
4(2) paper, thus  providing liquidity.  Rule 144A securities  generally must  be
sold  to other  qualified institutional  buyers. If  a particular  investment in
Section 4(2) paper or Rule 144A securities is not determined to be liquid,  that
investment  will be included within the 15% limitation on investment in illiquid
securities. The ability to sell Rule 144A securities to qualified  institutional
buyers is a recent development and it is not possible to predict how this market
will mature.
 
    WHEN-ISSUED  SECURITIES.    The  Fund  may  also  purchase  securities  on a
"when-issued"  basis.  When-issued  securities  are  securities  purchased   for
delivery beyond the normal settlement date at a stated price and yield. The Fund
will  generally not pay  for such securities  or start earning  interest on them
until they  are  received.  Securities  purchased on  a  when-issued  basis  are
recorded  as an asset and are subject to  changes in value based upon changes in
the general  level of  interest  rates. The  Fund  expects that  commitments  to
purchase  when-issued securities will not  exceed 25% of the  value of its total
assets absent unusual market  conditions. The Fund does  not intend to  purchase
when-issued  securities for speculative purposes but  only in furtherance of its
investment objective.
 
    LENDING OF PORTFOLIO SECURITIES.   In order  to generate additional  income,
the Fund may lend portfolio securities up to one-third of the value of its total
assets to broker/dealers, banks, or other institutional borrowers of securities.
The  Fund will only enter into  loan arrangements with broker/dealers, banks, or
other institutions which the Investment Adviser has determined are  creditworthy
under  guidelines established by  the Fund's Board of  Trustees and will receive
collateral in the form of cash or  U.S. government securities equal to at  least
100% of the value of the securities loaned.
 
   
    TEMPORARY  DEFENSIVE  POSITIONS.   When  maintaining  a  temporary defensive
position, the Fund may invest its assets, without limit, in any fixed rate  U.S.
government  securities  and repurchase  agreements,  commercial paper  and other
short-term corporate obligations. The Fund's  investment in commercial paper  or
corporate  obligations  will be  limited  to securities  with  one year  or less
remaining to  maturity  and rated  A-1  by S&P  Corporation  or P-1  by  Moody's
Investor Service, Inc.
    
 
   
    PORTFOLIO  TURNOVER.  Although  the Fund does  not intend to  invest for the
purpose of seeking short-term profits, securities in its portfolio will be  sold
whenever  the Fund's Investment Adviser  believes it is appropriate  to do so in
light of the Fund's investment objective, without regard to the length of time a
particular security may have been held.
    
 
INVESTMENT LIMITATIONS
 
    The Fund's investment  objective and  the policies described  above are  not
fundamental  and may be changed by the  Trust's Board of Trustees without a vote
of shareholders. If there is a change in the investment objective,  shareholders
should  consider whether the Fund remains  an appropriate investment in light of
their  then  current  financial  position  and  needs.  The  Fund's   investment
limitations  summarized below may not be changed without the affirmative vote of
the  holders  of  a  majority  of  its  outstanding  shares.  There  can  be  no
 
                                       7
<PAGE>
assurance  that the Fund will achieve its investment objective. (A complete list
of the  investment  limitations  that  cannot  be  changed  without  a  vote  of
shareholders  is  contained in  the  Statement of  Additional  Information under
"Investment Objective and Policies.")
 
    The Fund may not:
 
        1.   Borrow  money,  except that  the  Fund  may (i)  borrow  money  for
    temporary  or emergency purposes (not for leveraging or investment) and (ii)
    engage in reverse repurchase agreements or dollar roll transactions for  any
    purpose;  provided that (i) and (ii)  in combination do not exceed one-third
    of the value of the Fund's total assets (including the amount borrowed) less
    liabilities (other than borrowings).
 
        2.  Purchase any securities which would  cause 25% or more of the  value
    of its total assets at the time of purchase to be invested in the securities
    of  issuers  conducting  their  principal business  activities  in  the same
    industry, provided that there is  no limitation with respect to  investments
    in U.S. government obligations and obligations of domestic banks.
 
   
                  PURCHASE, REDEMPTION AND EXCHANGE OF SHARES
    
 
PURCHASE PROCEDURES
   
    Shares  of the Fund  are sold at the  net asset value per  share of the Fund
next determined  after receipt  of  a purchase  order  by Lehman  Brothers  Inc.
("Lehman  Brothers"), a  Distributor of the  Fund's shares.  Purchase orders for
shares are accepted only on days on  which both Lehman Brothers and the  Federal
Reserve  Bank of Boston are open for  business and must be transmitted to Lehman
Brothers by telephone at 1-800-851-3134 before 4:00 p.m., Eastern time.  Payment
in  federal funds immediately available to  the Custodian, Boston Safe Deposit &
Trust Company,  must be  received before  3:00 p.m.,  Eastern time  on the  next
business  day following  the order.  The Fund may  in its  discretion reject any
order for shares.  (Payment for  orders which are  not received  or accepted  by
Lehman   Brothers  will  be  returned  after   prompt  inquiry  to  the  sending
institution.) Any  person  entitled  to  receive  compensation  for  selling  or
servicing  shares of the Fund may  receive different compensation for selling or
servicing one class of shares over another class.
    
 
    The minimum aggregate initial investment by an institution in the investment
portfolios that comprise  the Trust is  $1 million (with  not less than  $25,000
invested  in  any  one  investment portfolio  offered  by  the  Trust); however,
broker-dealers and other institutional  investors may set  a higher minimum  for
their  customers. To reach the  minimum Trust-wide initial investment, purchases
of shares may be  aggregated over a  period of six months.  There is no  minimum
subsequent investment.
 
    SUBACCOUNTING  SERVICES.  Institutions are  encouraged to open single master
accounts. However, certain  institutions may  wish to use  the transfer  agent's
subaccounting  system to minimize their internal recordkeeping requirements. The
transfer agent  charges a  fee  based on  the  level of  subaccounting  services
rendered.  Institutions holding Fund shares in a fiduciary, agency, custodial or
similar capacity may charge or pass through subaccounting fees as part of or  in
addition  to normal trust or agency account  fees. They may also charge fees for
other services provided which  may be related to  the ownership of Fund  shares.
This  Prospectus should, therefore, be read  together with any agreement between
the customer and the institution with regard to the services provided, the  fees
charged for those services and any restrictions and limitations imposed.
 
REDEMPTION PROCEDURES
    Redemption orders must be transmitted to Lehman Brothers by telephone in the
manner  described herein. Shares are  redeemed at the net  asset value per share
next determined  after Lehman  Brothers' receipt  of the  redemption order.  The
proceeds  paid to  a shareholder upon  redemption may  be more or  less than the
amount invested  depending  upon  a share's  net  asset  value at  the  time  of
redemption.
 
                                       8
<PAGE>
    Subject to the foregoing, payment for redeemed shares for which a redemption
order  is received by Lehman  Brothers before 4:00 P.M.,  Eastern time, on a day
that both Lehman Brothers and  the Federal Reserve Bank  of Boston are open  for
business is normally made in federal funds wired to the redeeming shareholder on
the  next business  day following  the redemption  order. The  Fund reserves the
right to  wire  redemption  proceeds  within  seven  days  after  receiving  the
redemption  order  if, in  the judgment  of the  Investment Adviser,  an earlier
payment could adversely affect the Fund.
 
   
    The Fund shall have the right to redeem involuntarily shares in any  account
at  their net asset value if the value of the account is less than $10,000 after
60 days' prior written notice to  the shareholder. Any such redemption shall  be
effected  at the net asset value per  share next determined after the redemption
order is entered.  If during  the 60 day  period the  shareholder increases  the
value of its account to $10,000 or more, no such redemption shall take place. In
addition,  the  Fund may  redeem shares  involuntarily or  suspend the  right of
redemption as permitted  under the Investment  Company Act of  1940, as  amended
(the  "1940  Act"),  or under  certain  special circumstances  described  in the
Statement of Additional  Information under "Additional  Purchase and  Redemption
Information."
    
 
    The  ability to give telephone instructions for the redemption (and purchase
or exchange) of shares is automatically established on a shareholder's  account.
However, the Fund reserves the right to refuse a redemption order transmitted by
telephone  if it is believed  advisable to do so.  Procedures for redeeming Fund
shares by telephone may  be modified or  terminated at any time  by the Fund  or
Lehman Brothers. In addition, neither the Fund, Lehman Brothers nor the Transfer
Agent will be responsible for the authenticity of telephone instructions for the
purchase, redemption or exchange of shares where the instructions are reasonably
believed  to be genuine. Accordingly,  the investor will bear  the risk of loss.
The Fund will  attempt to confirm  that telephone instructions  are genuine  and
will  use such procedures as are  considered reasonable, including the recording
of telephone instructions. To the extent  that the Fund fails to use  reasonable
procedures  to  verify  the genuineness  of  telephone instructions,  it  or its
service providers  may  be  liable  for  such  instructions  that  prove  to  be
fraudulent or unauthorized.
 
    To  allow  the Fund's  Investment Adviser  to  manage the  Fund effectively,
investors are strongly urged to initiate all investments or redemptions of  Fund
shares  as early in the  day as possible and to  notify Lehman Brothers at least
one day in advance of transactions in excess of $5 million.
 
   
EXCHANGE PROCEDURES
    
   
    The Exchange Privilege enables a shareholder to exchange shares of the  Fund
without  charge for  shares of  other funds  of the  Trust which  have different
investment objectives  that may  be  of interest  to  shareholders. To  use  the
Exchange  Privilege, exchange instructions  must be given  to Lehman Brothers by
telephone. See "Redemption Procedures." In exchanging shares, a shareholder must
meet the minimum initial investment requirement of the other fund and the shares
involved must be legally available for  sale in the state where the  shareholder
resides. Before any exchange, the shareholder must also obtain and should review
a  copy of  the prospectus of  the fund into  which the exchange  is being made.
Prospectuses may be  obtained from  Lehman Brothers  by calling  1-800-368-5556.
Shares will be exchanged at the net asset value next determined after receipt of
an  exchange request  in proper  form. The  exchange of  shares of  one fund for
shares of another fund is treated for  Federal Income Tax purposes as a sale  of
the  shares given in  exchange by the shareholder  and, therefore, a shareholder
may realize a taxable gain  or loss. The Fund reserves  the right to reject  any
exchange  request in whole or in part. The Exchange Privilege may be modified or
terminated at any time upon notice to shareholders.
    
 
                                       9
<PAGE>
VALUATION OF SHARES--NET ASSET VALUE
 
   
    The Fund's net asset  value per share for  purposes of pricing purchase  and
redemption  orders is  determined by the  Fund's Administrator as  of 4:00 p.m.,
Eastern time, on  each weekday, with  the exception of  those holidays on  which
either  the New  York Stock Exchange  or the  Federal Reserve Bank  of Boston is
closed. Currently, one or both of these institutions are closed on the customary
national business  holidays of  New Year's  Day, Martin  Luther King,  Jr.  Day,
Presidents'   Day,  Good  Friday,  Memorial  Day  (observed),  Independence  Day
(observed),  Labor  Day,  Columbus  Day,  Veterans  Day,  Thanksgiving  Day  and
Christmas  Day. The net  asset value per  share of Fund  shares is calculated by
adding the value  of all securities  and other assets  of the Fund,  subtracting
liabilities,  and  dividing  the  result  by  the  total  number  of  the Fund's
outstanding shares (irrespective of  class or sub-class).  The Fund's net  asset
value  per  share for  purposes  of pricing  purchase  and redemption  orders is
determined independently of the net asset value of the Trust's other  investment
portfolios.
    
 
OTHER MATTERS
 
    Fund  shares are sold and redeemed without charge by the Fund. Institutional
investors purchasing  or holding  Fund shares  for their  customer accounts  may
charge  customers  fees  for  cash management  and  other  services  provided in
connection with their accounts. A customer should, therefore, consider the terms
of its account with an institution before purchasing Fund shares. An institution
purchasing or redeeming Fund  shares on behalf of  its customers is  responsible
for  transmitting  orders to  Lehman Brothers  in  accordance with  its customer
agreements.
 
                                   DIVIDENDS
 
    Shareholders of the Fund are entitled to dividends and distributions arising
only from  the  net investment  income  and capital  gains,  if any,  earned  on
investments held by the Fund. The Fund's net investment income is declared daily
as  a dividend to shares held  of record at the close  of business on the day of
declaration. Shares begin accruing dividends on the next business day  following
receipt  of  the purchase  order  and continue  to  accrue dividends  up  to and
including the day  that such  shares are  redeemed. Dividends  are paid  monthly
within  five business days  after the end  of the month  or within five business
days after a redemption of all of a shareholder's shares of a particular  class.
Net capital gains distributions, if any, will be made annually.
 
   
    Dividends  are determined in the same manner and are paid in the same amount
for each  Fund share,  except that  shares of  the other  classes bear  all  the
expense  of Rule 12b-1 distribution  fees paid. As a  result, at any given time,
the net yield on shares of the other classes will be lower than the net yield on
Institutional Shares.
    
 
    Institutional shareholders may elect to  have their dividends reinvested  in
additional  full and fractional shares of the  same class of shares with respect
to which such dividends are  declared at the net asset  value of such shares  on
the  payment  date.  Reinvested  dividends receive  the  same  tax  treatment as
dividends paid in cash. Such election,  or any revocation thereof, must be  made
in  writing to  The Shareholder Services  Group, Inc. ("TSSG"),  a subsidiary of
First Data  Corporation  and  the  Fund's transfer  agent,  at  P.O.  Box  9690,
Providence, Rhode Island 02940-9690, and will become effective after its receipt
by TSSG, with respect to dividends paid.
 
    TSSG,  as transfer agent, will send  each Fund shareholder or its authorized
representative an  annual  statement designating  the  amount, if  any,  of  any
dividends  and  distributions  made  during  each  year  and  their  federal tax
qualification.
 
                                       10
<PAGE>
                                     TAXES
 
    The Fund intends to  qualify each year as  a "regulated investment  company"
under  the Internal Revenue Code  of 1986, as amended  (the "Code"). A regulated
investment company is exempt from federal  income tax on amounts distributed  to
its shareholders.
 
   
    Qualification as a regulated investment company under the Code for a taxable
year  requires, among other things, that the Fund distribute to its shareholders
at least 90% of its investment company taxable income for such year. In general,
the Fund's  investment  company  taxable  income  will  be  its  taxable  income
(including  dividends and short-term  capital gains, if  any) subject to certain
adjustments and excluding the excess of any net long-term capital gains for  the
taxable  year over the net  short-term capital loss, if  any, for such year. The
Fund intends to distribute substantially  all of its investment company  taxable
income  each year. Such distributions will be taxable as ordinary income to Fund
shareholders who are  not currently  exempt from federal  income taxes,  whether
such  income is  received in cash  or reinvested in  additional shares. (Federal
income taxes for  distributions to  an IRA or  a qualified  retirement plan  are
deferred   under  the  Code.)  It  is   anticipated  that  none  of  the  Fund's
distributions  will  be  eligible  for  the  dividends  received  deduction  for
corporations.
    
 
    Dividends  declared in October, November or  December of any year payable to
shareholders of record on a specified date in such months will be deemed to have
been received by the shareholders  and paid by the Fund  on December 31 of  such
year  in  the event  such  dividends are  actually  paid during  January  of the
following year. Shareholders will be advised at least annually as to the federal
income tax status of distributions made to them each year.
 
    The foregoing discussion is  only a brief summary  of some of the  important
federal tax considerations generally affecting the Fund and its shareholders. As
noted above, IRAs receive special tax treatment. No attempt is made to present a
detailed  explanation of the federal, state or local income tax treatment of the
Fund or its shareholders,  and this discussion is  not intended as a  substitute
for  careful tax planning.  Accordingly, potential investors  in the Fund should
consult their tax advisors with specific reference to their own tax situation.
 
                             MANAGEMENT OF THE FUND
 
    The business and affairs of the Fund are managed under the direction of  the
Trust's  Board  of Trustees.  The  Trustees approve  all  significant agreements
between the Trust  and the  persons or companies  that furnish  services to  the
Fund,   including   agreements  with   its  Distributors,   Investment  Adviser,
Administrator, Custodian and  Transfer Agent. The  day-to-day operations of  the
Fund  are  delegated to  the Fund's  Investment  Adviser and  Administrator. One
Trustee and all of the Trust's officers are affiliated with Lehman Brothers, The
Boston Company  Advisors, Inc.  or one  of their  affiliates. The  Statement  of
Additional   Information  relating  to  the  Fund  contains  general  background
information regarding each Trustee and executive officer of the Trust.
 
INVESTMENT ADVISER--LEHMAN BROTHERS GLOBAL ASSET MANAGEMENT INC.
 
   
    Lehman Brothers Global Asset Management  Inc. ("LBGAM"), located at 3  World
Financial  Center, New  York, New  York 10285,  serves as  the Fund's Investment
Adviser. LBGAM is  a wholly owned  subsidiary of Lehman  Brothers Holdings  Inc.
("Holdings").  All of the issued and  outstanding common stock (representing 92%
of the voting  stock) of Holdings  is held by  American Express Company.  LBGAM,
together  with other Lehman  Brothers investment advisory  affiliates, serves as
investment adviser to investment companies  and private accounts and has  assets
under management in excess of $17 billion.
    
 
    As  Investment Adviser  to the Fund,  LBGAM manages the  Fund's portfolio in
accordance  with  its  investment  objective  and  policies,  makes   investment
decisions    for   the    Fund,   places    orders   to    purchase   and   sell
 
                                       11
<PAGE>
   
securities and employs professional  portfolio managers and securities  analysts
who provide research services to the Fund. For its services LBGAM is entitled to
a monthly fee payable by the Fund at the annual rate of .30% of the value of the
Fund's average daily net assets.
    
 
    Kirk  D. Hartman,  a Managing  Director of  LBGAM, has  been associated with
Lehman Brothers  in the  Mortgage  Department since  1987.  Mr. Hartman  is  the
portfolio  manager primarily responsible for  managing the day-to-day operations
of the Fund, including the making of investment selections. Mr. Hartman will  be
assisted  by Andrew  J. Stenwall,  a Vice President  of LBGAM.  Mr. Hartman will
manage the Fund as of commencement of operations.
 
ADMINISTRATOR--THE BOSTON COMPANY ADVISORS, INC.
 
   
    The Boston  Company  Advisors,  Inc. ("Boston  Advisors"),  located  at  One
Exchange Place, Boston, Massachusetts 02109, serves as the Fund's Administrator.
Boston  Advisors is a wholly owned subsidiary of The Boston Company, Inc., which
is in turn a wholly owned subsidiary of Boston Group Holdings, Inc. ("BGH"). BGH
is a  wholly owned  subsidiary  of Mellon  Bank Corporation.  As  Administrator,
Boston  Advisors  calculates  the  net  asset value  of  the  Fund's  shares and
generally assists in all aspects of the Fund's administration and operation.  As
compensation for its services as Administrator, Boston Advisors is entitled to a
monthly  fee at the annual rate of .10% of the value of the Fund's average daily
net assets.
    
 
DISTRIBUTORS AND PLAN OF DISTRIBUTION
 
    Lehman Brothers, located  at 3 World  Financial Center, New  York, New  York
10285,  is a Distributor of the Fund. Lehman Brothers, a wholly owned subsidiary
of Holdings, is one of the  leading full-line investment firms serving the  U.S.
and foreign securities and commodities markets. American Express Company and its
subsidiaries,  other  than  Lehman  Brothers,  are  principally  engaged  in the
businesses  of   providing   travel-related   services,   investment   services,
information  services, international banking services and investors' diversified
financial services. Funds Distributor Inc., a wholly owned subsidiary of  Lehman
Brothers located at One Exchange Place, Boston, Massachusetts 02109, also serves
as a distributor of the Fund.
 
   
    The  Trust has adopted a Plan  of Distribution with respect to Institutional
Shares of  the Fund  pursuant to  Rule 12b-1  under the  1940 Act.  The Plan  of
Distribution does not provide for the payment by the Fund of any Rule 12b-1 fees
for  distribution or shareholder services  for Institutional Shares but provides
that Lehman  Brothers  may  make  payments to  assist  in  the  distribution  of
Institutional Shares out of the other fees received by it or its affiliates from
the Fund, its past profits or any other sources available to it.
    
 
EXPENSES
 
   
    The  Fund bears  all its  own expenses.  The Fund's  expenses include taxes,
interest, fees and  salaries of the  Trust's trustees and  officers who are  not
directors,  officers or employees of  the Fund's service contractors, Securities
and Exchange  Commission fees,  state securities  qualification fees,  costs  of
preparing and printing prospectuses for regulatory purposes and for distribution
to  shareholders, advisory  and administration  fees, charges  of the custodian,
transfer agent  and  dividend  disbursing  agent,  certain  insurance  premiums,
outside   auditing  and  legal  expenses,   costs  of  shareholder  reports  and
shareholder meetings  and any  extraordinary expenses.  The Fund  also pays  for
brokerage fees and commissions (if any) in connection with the purchase and sale
of portfolio securities. In order to maintain a competitive expense ratio, LBGAM
has  agreed voluntarily to waive its fee or  to reimburse the Fund if and to the
extent that the Fund's total operating expenses exceed .40% of average daily net
assets. This  voluntary waiver  and  reimbursement will  not be  changed  unless
shareholders  are provided  at least 60  days' advance notice.  In addition, the
Investment Adviser has agreed  to reimburse the Fund  to the extent required  by
applicable state law for certain expenses that are described in the Statement of
Additional Information relating to the Fund.
    
 
                                       12
<PAGE>
                            PERFORMANCE INFORMATION
 
   
    From  time to  time, in  advertisements or  in reports  to shareholders, the
"total return," "yields" and "effective yields" for shares may be quoted.  Total
return  and yield quotations  are computed separately for  each class of shares.
"Total return" for a  particular class of shares  represents the change, over  a
specified  period of  time, in the  value of  an investment in  the shares after
reinvesting all  income and  capital  gain distributions.  It is  calculated  by
dividing that change by the initial investment and is expressed as a percentage.
The  "yield" quoted in advertisements for a particular class of shares refers to
the income generated  by an investment  in such shares  over a specified  period
(such  as a 30-day period) identified in  the advertisement. This income is then
"annualized;" that is, the amount of  income generated by the investment  during
that  period  is assumed  to be  generated each  such period  over a  52-week or
one-year period and is shown as  a percentage of the investment. The  "effective
yield"  is calculated  similarly but, when  annualized, the income  earned by an
investment in a  particular class is  assumed to be  reinvested. The  "effective
yield"  will  be slightly  higher than  the "yield"  because of  the compounding
effect of this assumed reinvestment.
    
 
   
    The Fund's performance may  be compared to that  of other mutual funds  with
similar  objectives, to stock or other relevant indices, or to rankings prepared
by independent services or other financial or industry publications that monitor
the performance of mutual funds. For example, such data are reported in national
financial publications such as MORNINGSTAR, INC., BARRON'S, IBC/DONOGHUE'S  INC.
BOND  FUND  REPORT, THE  WALL STREET  JOURNAL  and THE  NEW YORK  TIMES, reports
prepared by Lipper  Analytical Services,  Inc. and  publications of  a local  or
regional  nature. The Fund's Lipper ranking in  the "U.S. Mortgage Fund" or "ARM
Fund" categories may also be quoted from  time to time in advertising and  sales
literature.
    
 
   
    Distribution   rates  may  also  be  quoted  for  the  Fund.  Quotations  of
distribution rates are calculated by annualizing the most recent distribution of
net investment income  for a  monthly, quarterly  or other  relevant period  and
dividing  this amount by the ending net asset value for the period for which the
distribution rates are being calculated.
    
 
   
    THE FUND'S TOTAL RETURN  AND YIELD FIGURES FOR  A CLASS OF SHARES  REPRESENT
PAST  PERFORMANCE, WILL FLUCTUATE AND SHOULD NOT BE CONSIDERED AS REPRESENTATIVE
OF FUTURE RESULTS. The performance of any investment is generally a function  of
portfolio quality and maturity, type of investment and operating expenses. Since
the  shares  of  other  classes  bear  all  service  fees  for  distribution  or
shareholder services,  the total  return and  net yield  of such  shares can  be
expected  at any given time to  be lower than the total  return and net yield of
Institutional Shares. Any  fees charged by  institutional investors directly  to
their  customers in connection with investments in Fund shares are not reflected
in the Fund's  expenses, total  return or yields;  and, such  fees, if  charged,
would  reduce the actual return received  by customers on their investments. The
methods used to compute the Fund's total return and yields are described in more
detail  in  the  Statement  of   Additional  Information.  Investors  may   call
1-800-238-2560  (Institutional Shares  Code: 012) to  obtain current performance
information.
    
 
                             DESCRIPTION OF SHARES
 
   
    The Trust  is a  Massachusetts business  trust established  on November  25,
1992. The Trust's Declaration of Trust authorizes the Board of Trustees to issue
an  unlimited number of full and fractional shares of beneficial interest in the
Trust and  to  classify or  reclassify  any unissued  shares  into one  or  more
additional  classes of shares. Pursuant to  such authority, the Trust has issued
three classes  of shares  for twelve  investment portfolios  of the  Trust.  The
Declaration  of Trust further authorizes the  Trustees to classify or reclassify
any class  of shares  into one  or more  sub-classes. The  issuance of  separate
classes  of  shares  is  intended  to address  the  different  service  needs of
different types of investors.  Each share represents interests  in each Fund  in
proportion  to  each share's  net  asset value,  except  that shares  of certain
classes bear fees and expenses for certain shareholder services or  distribution
and support services provided to that class.
    
 
                                       13
<PAGE>
    As  a Massachusetts business trust, the Trust is not required to hold annual
meetings of shareholders. However, the Trust will call a meeting of shareholders
where required by law for purposes such  as voting upon the question of  removal
of a member of the Board of Trustees upon written request of shareholders owning
at  least  10%  of  the  outstanding  shares  of  the  Trust  entitled  to vote.
Shareholders of the  Trust are entitled  to one  vote for each  full share  held
(irrespective  of class or portfolio) and fractional votes for fractional shares
held.
 
   
    The Trust has adopted  a Plan of Distribution  pursuant to Rule 12b-1  under
which shares of other classes ("Select Shares" and "Premier Shares") of the Fund
are  sold to investors. Pursuant  to the Plan of  Distribution Select Shares are
sold to institutional investors  and bear fees payable  at a rate not  exceeding
.35% (on an annualized basis) of the average daily net asset value of the shares
beneficially  owned by such  investors in return  for certain administrative and
shareholder services provided by Lehman Brothers or the institutional investors.
These services may include processing purchase, exchange and redemption requests
from customers and placing orders  with the Transfer Agent; processing  dividend
and  distribution  payments from  the Funds  on  behalf of  customers; providing
information  periodically  to  customers  showing  their  positions  in  shares;
responding  to inquiries from  customers concerning their  investment in shares;
arranging for bank wires;  and providing such other  similar services as may  be
reasonably  requested. Premier Shares are offered by Lehman Brothers directly to
individual investors. Pursuant to the Plan of Distribution, the Fund has  agreed
to  pay Lehman Brothers  a monthly fee  at an annual  rate of up  to .50% of the
average daily net asset value of  the Premier Shares for distribution and  other
services  provided to holders of Premier Shares.  Shares of each class will bear
all  fees  paid  for  services  provided  to  that  class  under  the  Plan   of
Distribution.
    
 
                                       14
<PAGE>
                LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
 
   
                            Prime Money Market Fund
                         Prime Value Money Market Fund
                    Government Obligations Money Market Fund
                 100% Government Obligations Money Market Fund
                   Treasury Instruments Money Market Fund II
                  100% Treasury Instruments Money Market Fund
                          Municipal Money Market Fund
                           Tax-Free Money Market Fund
                     California Municipal Money Market Fund
    
 
                                ---------------
 
   
                       Floating Rate U.S. Government Fund
                      Short Duration U.S. Government Fund
    
 
                            ------------------------
 
NO  PERSON  HAS  BEEN  AUTHORIZED  TO  GIVE  ANY  INFORMATION  OR  TO  MAKE  ANY
REPRESENTATIONS NOT CONTAINED IN THIS PROSPECTUS, OR IN THE FUND'S STATEMENT  OF
ADDITIONAL  INFORMATION INCORPORATED HEREIN BY REFERENCE, IN CONNECTION WITH THE
OFFERING MADE BY  THIS PROSPECTUS  AND, IF GIVEN  OR MADE,  SUCH INFORMATION  OR
REPRESENTATIONS  MUST NOT BE RELIED UPON AS  HAVING BEEN AUTHORIZED BY THE TRUST
OR ITS DISTRIBUTORS.  THIS PROSPECTUS  DOES NOT  CONSTITUTE AN  OFFERING BY  THE
TRUST  OR BY THE DISTRIBUTORS IN ANY JURISDICTION IN WHICH SUCH OFFERING MAY NOT
LAWFULLY BE MADE.
 
                              -------------------
 
                               TABLE OF CONTENTS
 

[CAPTION]
                                                 PAGE
                                                 -----
                                           
Background and Expense Information..........           2
Investment Objective and Policies...........           2
Purchase, Redemption and Exchange of
 Shares.....................................           8
Dividends...................................          10
Taxes.......................................          11
Management of the Fund......................          11
Performance Information.....................          13
Description of Shares.......................          13

 
   
                                 FLOATING RATE
                              U.S. GOVERNMENT FUND
    
 
                              -------------------
 
   
                                   PROSPECTUS
                               February 21, 1994
    
 
                             ---------------------
 
                                LEHMAN BROTHERS
 
THIS PROSPECTUS AND THE STATEMENT OF ADDITIONAL INFORMATION INCORPORATED  HEREIN
RELATE  PRIMARILY TO  THE FUND  AND DESCRIBE  ONLY THE  INVESTMENT OBJECTIVE AND
POLICIES,  OPERATIONS,  CONTRACTS  AND  OTHER  MATTERS  RELATING  TO  THE  FUND.
INVESTORS  WISHING  TO OBTAIN  SIMILAR INFORMATION  REGARDING THE  TRUST'S OTHER
PORTFOLIOS MAY OBTAIN SEPARATE PROSPECTUSES DESCRIBING THEM BY CONTACTING LEHMAN
BROTHERS AT 1-800-368-5556.
<PAGE>
                                LEHMAN BROTHERS
                       FLOATING RATE U.S. GOVERNMENT FUND
 
                       An Investment Portfolio Offered By
                Lehman Brothers Institutional Funds Group Trust
 
   
    Lehman  Brothers  Institutional  Funds  Group  Trust  (the  "Trust")  is  an
open-end, management investment company. The shares described in this Prospectus
represent interests in a class of shares ("Select Shares") of the Floating  Rate
U.S.  Government Fund  (the "Fund"), a  diversified investment  portfolio of the
Trust.  Fund  shares  may  not   be  purchased  by  individuals  directly,   but
institutional   investors  may  purchase  shares   for  accounts  maintained  by
individuals.
    
 
    The Fund's INVESTMENT OBJECTIVE is to provide a high level of current income
consistent with  minimal  fluctuation  of  net asset  value.  The  Fund  invests
primarily  in a portfolio  consisting of U.S.  government and agency securities,
including floating rate and adjustable rate mortgage securities, and  repurchase
agreements collateralized by such obligations.
 
   
    LEHMAN  BROTHERS  INC. sponsors  the  Fund and  acts  as Distributor  of its
shares. LEHMAN  BROTHERS  GLOBAL ASSET  MANAGEMENT  INC. serves  as  the  Fund's
Investment Adviser.
    
 
    The  address of the Fund is One Exchange Place, Boston, Massachusetts 02109.
The Fund can be  contacted as follows: FOR  PURCHASE AND REDEMPTION ORDERS  ONLY
CALL  1-800-851-3134;  for  yield  information  call  1-800-238-2560;  for other
information call 1-800-368-5556.
 
   
    This Prospectus briefly sets forth  certain information about the Fund  that
investors  should  know before  investing. Investors  are  advised to  read this
Prospectus and retain it for future reference. Additional information about  the
Fund,  contained in  a Statement  of Additional  Information dated  February 21,
1994, as amended  or supplemented from  time to  time, has been  filed with  the
Securities  and Exchange Commission and is available to investors without charge
by calling the Fund's Distributor at 1-800-368-5556. The Statement of Additional
Information is incorporated in its entirety by reference into this Prospectus.
    
 
    SHARES OF THE  FUND ARE  NOT DEPOSITS OR  OBLIGATIONS OF,  OR GUARANTEED  OR
ENDORSED  BY, ANY BANK, AND SUCH SHARES ARE NOT FEDERALLY INSURED BY THE FEDERAL
DEPOSIT INSURANCE CORPORATION, THE FEDERAL RESERVE BOARD OR ANY OTHER GOVERNMENT
AGENCY. SHARES  OF THE  FUND  INVOLVE CERTAIN  INVESTMENT RISKS,  INCLUDING  THE
POSSIBLE LOSS OF PRINCIPAL.
 
                            ------------------------
 
THESE  SECURITIES  HAVE  NOT  BEEN APPROVED  OR  DISAPPROVED  BY  THE SECURITIES
    AND   EXCHANGE   COMMISSION   OR   ANY   STATE   SECURITIES   COMMISSION
       NOR  HAS  THE  SECURITIES  AND EXCHANGE  COMMISSION  OR  ANY STATE
           SECURITIES  COMMISSION   PASSED  UPON   THE  ACCURACY   OR
               ADEQUACY  OF  THIS PROSPECTUS.  ANY REPRESENTATION
                      TO THE CONTRARY IS A CRIMINAL OFFENSE.
 
                            ------------------------
 
                                LEHMAN BROTHERS
 
February 21, 1994
<PAGE>
                       BACKGROUND AND EXPENSE INFORMATION
 
   
    The  Fund currently  offers three  separate classes  of shares,  only one of
which, Select Shares, is  offered by this Prospectus.  Each class represents  an
equal,  PRO RATA interest in the Fund. Each share accrues daily dividends in the
same manner,  except  that  Select Shares  bear  fees  payable by  the  Fund  to
institutional  investors for services  they provide to  the beneficial owners of
such shares. See "Management of the Fund -- Service Organizations."
    
 
   
    The purpose of the following table is to assist an investor in understanding
the various costs and expenses that an investor in the Fund would bear  directly
or  indirectly.  Certain  institutions may  also  charge their  clients  fees in
connection with investments in  Select Shares, which fees  are not reflected  in
the  table  below.  For more  complete  descriptions  of the  various  costs and
expenses, see "Management of the Fund"  in this Prospectus and the Statement  of
Additional Information.
    
 
                                EXPENSE SUMMARY
 

                                              
 ANNUAL FUND OPERATING EXPENSES
  (as a percentage of average net assets)
     Advisory Fees (net of waivers)...........    .17
     Rule 12b-1 fees..........................    .35
     Other Expenses -- including
      Administration Fees.....................    .23
                                                 -----
                                                 -----
     Total Fund Operating Expenses (after
      expense reimbursement)..................    .75
                                                 -----

 
- ---------
 

[CAPTION]
 EXAMPLE
                                                          
 You  would pay the following  expenses on a $1,000
 investment, assuming (1)  a 5%  annual return  and
 (2) redemption at the end of each time period with
 respect to the following shares:
 
[CAPTION]
                                                      1 YEAR    3 YEARS
                                                      ------    -------
                                                          
                                                        $8        $24

 
THE  FOREGOING SHOULD NOT BE CONSIDERED  A REPRESENTATION OF ACTUAL EXPENSES AND
RATE OF RETURN, WHICH MAY BE GREATER OR LESSER THAN THOSE SHOWN.
 
   
    The Fund's Investment  Adviser has voluntarily  agreed to waive  its fee  or
reimburse  the Fund  to the extent  necessary to maintain  the Fund's annualized
expense ratio at .75%. The voluntary waiver or reimbursement will not be changed
unless shareholders are provided at least 60 days' advance notice. In  addition,
the Administrator may waive a portion of its fees which will assist in achieving
this  expense ratio. Absent waivers or  reimbursement of expenses, Advisory Fees
with respect to Select  Shares would be .30%  annually, Other Expenses would  be
.25% annually and the Total Fund Operating Expenses would be .90%, of the Fund's
average daily net assets. The foregoing table has not been audited by the Fund's
independent accountants.
    
 
                       INVESTMENT OBJECTIVE AND POLICIES
 
    The  investment objective of the Fund is  to provide a high level of current
income consistent with minimal  fluctuation of net  asset value. Current  income
includes, in general, discount earned on U.S. Treasury bills and agency discount
notes,  interest earned on mortgage-related securities and other U.S. government
and agency
 
                                       2
<PAGE>
securities, and short-term capital gains. While  there can be no assurance  that
the Fund will be able to maintain minimal fluctuation of net asset value or that
it  will  achieve its  investment  objective, the  Fund  endeavors to  do  so by
following the investment policies described in this Prospectus.
 
   
    The Fund  pursues  its investment  objective  by investing  primarily  in  a
professionally  managed  portfolio  of  adjustable rate  or  floating  rate U.S.
government and agency securities which are issued or guaranteed as to payment of
principal   and   interest   by   the   U.S.   government,   its   agencies   or
instrumentalities.  As a mutual fund with "Floating Rate U.S. Government" in its
name, under normal market conditions, the Fund  must invest at least 65% of  its
portfolio in such instruments.
    
 
DURATION
 
   
    Under normal interest rate conditions, the Fund's average portfolio duration
will  be  between  that  of  a  six-month  and  a  one-year  U.S.  Treasury Bill
(approximately 0.5  to one-year)  This means  that the  Fund's net  asset  value
fluctuation  is expected to  be similar to  the price fluctuation  of a one-year
U.S. Treasury Bill.  The Fund's average  portfolio duration is  not expected  to
exceed  that  of a  two-year U.S.  Treasury Note  (approximately 1.9  years). In
computing the average  duration of  its portfolio,  the Fund  will estimate  the
duration  of obligations  that are  subject to  prepayment or  redemption by the
issuer, taking into account the influence  of interest rates on prepayments  and
coupon  flows. Maturity, in  contrast to duration, measures  only the time until
final payment is due on an investment; it does not take into account the pattern
of a security's  cash flow over  time, including  how cash flow  is affected  by
prepayments and by changes in interest rates.
    
 
ACCEPTABLE INVESTMENTS
 
    The  types of mortgage securities  in which the Fund  may invest include the
following:
 
    (a)  adjustable rate mortgage securities;
 
    (b) collateralized mortgage obligations;
 
    (c)  real estate mortgage investment conduits; and
 
    (d) other securities  collateralized by  or representing  interests in  real
       estate mortgages whose interest rates reset at periodic intervals and are
       issued   or  guaranteed   by  the   U.S.  government,   its  agencies  or
       instrumentalities.
 
    In addition to the securities described  above, the Fund may also invest  in
direct obligations of the U.S. Treasury, such as U.S. Treasury bills, notes, and
bonds,  as well as obligations of  U.S. government agencies or instrumentalities
which are not collateralized by or represent interests in real estate mortgages.
 
    The Fund may also invest in mortgage-related securities which are issued  by
private  entities such as investment banking  firms and companies related to the
construction industry. The privately issued mortgage-related securities in which
the Fund may invest include:
 
    (a)   privately  issued securities  which  are collateralized  by  pools  of
       mortgages in which each mortgage is guaranteed as to payment of principal
       and interest by an agency or instrumentality of the U.S. government;
 
    (b)  privately  issued  securities  which  are  collateralized  by  pools of
       mortgages in which payment  of principal and  interest are guaranteed  by
       the  issuer  and  such  guarantee is  collateralized  by  U.S. government
       securities; and
 
                                       3
<PAGE>
    (c)  other privately issued securities in which the proceeds of the issuance
       are invested in mortgage-backed securities  and payment of the  principal
       and interest are supported by the credit of any agency or instrumentality
       of the U.S. government.
 
    The  privately  issued mortgage-related  securities  provide for  a periodic
payment consisting of both interest and principal. The interest portion of these
payments will be distributed by the Fund as income, and the capital portion will
be reinvested.
 
DESCRIPTION OF ACCEPTABLE INVESTMENTS
 
    ADJUSTABLE  RATE  MORTGAGE  SECURITIES  ("ARMS").    ARMS  are  pass-through
mortgage  securities with adjustable rather than  fixed interest rates. The ARMS
in which the Fund invests are issued by Government National Mortgage Association
("GNMA"), Federal National Mortgage Association  ("FNMA") and Federal Home  Loan
Corporation  ("FHLMC") and are  actively traded. The  underlying mortgages which
collateralize ARMS issued by  GNMA are fully guaranteed  by the Federal  Housing
Administration   ("FHA")   or  Veterans   Administration  ("VA"),   while  those
collateralizing  ARMS  issued  by  FHLMC  or  FNMA  are  typically  conventional
residential  mortgages  conforming  to  strict  underwriting  size  and maturity
constraints.
 
    Unlike conventional bonds, ARMS pay back principal over the life of the ARMS
rather than at maturity.  Thus, a holder  of the ARMS, such  as the Fund,  would
receive  monthly scheduled  payments of principal  and interest  and may receive
unscheduled  principal  payments   representing  payments   on  the   underlying
mortgages.  At the time that a holder of the ARMS reinvests the payments and any
unscheduled prepayments of principal that it receives, the holder may receive  a
rate of interest paid on the existing ARMS. As a consequence, ARMS may be a less
effective  means of  "locking in" long-term  interest rates than  other types of
U.S. government securities.
 
    Not unlike other U.S. government securities,  the market value of ARMS  will
generally vary inversely with changes in market interest rates. Thus, the market
value  of ARMS generally  declines when interest rates  rise and generally rises
when interest rates decline.
 
    While ARMS generally entail less risk of a decline during periods of rapidly
rising rates, ARMS may  also have less potential  for capital appreciation  than
other   similar  investments  (e.g.,  investments  with  comparable  maturities)
because, as interest rates decline, the likelihood increases that mortgages will
be  prepaid.  Furthermore,  if  ARMS  are  purchased  at  a  premium,   mortgage
foreclosures  and unscheduled  principal payments may  result in some  loss of a
holder's principal investment to the extent of the premium paid. Conversely,  if
ARMS  are purchased at a discount, both  a scheduled payment of principal and an
unscheduled prepayment of principal would increase current and total returns and
would accelerate the  recognition of income,  which would be  taxed as  ordinary
income when distributed to shareholders.
 
    COLLATERALIZED  MORTGAGE  OBLIGATIONS ("CMOS").   CMOs  are bonds  issued by
single-purpose,  stand-alone  finance  subsidiaries   or  trusts  of   financial
institutions,  government agencies, investment banks or companies related to the
construction industry. CMOs purchased by the Fund may be:
 
    (a)   collateralized  by  pools  of mortgages  in  which  each  mortgage  is
       guaranteed  as  to payment  of  principal and  interest  by an  agency or
       instrumentality of the U.S. government;
 
    (b) collateralized by pools of mortgages  in which payment of principal  and
       interest is guaranteed by the issuer and such guarantee is collateralized
       by U.S. government securities; or
 
                                       4
<PAGE>
    (c)    securities in  which the  proceeds  of the  issuance are  invested in
       mortgage securities  and  payment  of  the  principal  and  interest  are
       supported  by  the credit  of an  agency or  instrumentality of  the U.S.
       government.
 
    All CMOs  purchased  by  the  Fund  are investment  grade,  as  rated  by  a
nationally recognized statistical rating organization.
 
    REAL  ESTATE MORTGAGE INVESTMENT CONDUITS  ("REMICS").  REMICs are offerings
of multiple class real estate mortgage-backed securities which qualify and elect
treatment as such  under provisions  of the  Internal Revenue  Code. Issuers  of
REMICs  may  take several  forms,  such as  trusts,  partnerships, corporations,
associations or a segregated pool of mortgages. Once REMIC status is elected and
obtained, the entity is not subject to federal income taxation. Instead,  income
is  passed through  the entity and  is taxed to  the person or  persons who hold
interests in the REMIC. A REMIC interest must consist of one or more classes  of
"regular interests," some of which may offer adjustable rates (the type in which
the  Fund primarily  invests), and  a single  class of  "residual interests." To
qualify as a REMIC,  substantially all of  the assets of the  entity must be  in
assets directly or indirectly secured principally by real property.
 
    STRIPPED MORTGAGE-BACKED SECURITIES ("SMBS").  The Fund may invest up to 10%
of   its  total  assets  in  SMBS,  which  are  derivative  multiclass  mortgage
securities. The Fund may only  invest in SMBS issued  or guaranteed by the  U.S.
Government,  its agencies or instrumentalities. SMBS are usually structured with
two classes that  receive different  proportions of the  interest and  principal
distributions  from a  pool of  mortgage assets,  which may  consist of mortgage
loans or guaranteed mortgage  pass-through certificates. A  common type of  SMBS
will have one class receiving all or a portion of the interest from the mortgage
assets,  while the other class  will receive all of  the principal. Moreover, in
some instances, one  class will receive  some of  the interest and  most of  the
principal  while  the other  class will  receive  most of  the interest  and the
remainder of the principal. If the underlying mortgage assets experience greater
than anticipated prepayments of principal, there may no longer be interest  paid
on  some of the underlying mortgage loans and the Fund, as a result, may fail to
fully recoup its initial investment in these securities. Although the market for
such securities  is  increasingly  liquid,  certain  SMBS  may  not  be  readily
marketable and will be considered illiquid for purposes of the Fund's limitation
on  investments in illiquid securities. The market value of the class consisting
entirely of principal payments  generally is unusually  sensitive to changes  in
interest  rates. The market  value of the class  consisting entirely of interest
payments is extremely sensitive not only  to changes in interest rates but  also
to  the  rate  of  principal payments,  including  prepayments,  on  the related
underlying mortgage assets. The yields on a  class of SMBS that receives all  or
most  of the interest from mortgage  assets are generally higher than prevailing
market yields  on  other  mortgage-backed securities  because  their  cash  flow
patterns  are  more  variable and  there  is  a greater  risk  that  the initial
investment will  not be  fully recouped.  The Investment  Adviser will  seek  to
manage  these risks (and potential  benefits) by investing in  a variety of such
securities and by using certain hedging techniques.
 
OTHER INVESTMENTS AND PRACTICES
 
   
    RESETS.  The interest rates paid on  the ARMS, CMOs and REMICs in which  the
Fund  invests generally are readjusted or reset at intervals of one year or less
to an increment over some predetermined interest rate index. There are two  main
categories of indices: those based on U.S. Treasury securities and those derived
from  a calculated measure, such as a cost of funds index or a moving average of
mortgage rates. Commonly  utilized indices  include the  one-year and  five-year
Constant  Maturity Treasury (CMT) rates, the three-month Treasury Bill rate, the
180-day Treasury  Bill  rate,  rates on  longer-term  Treasury  securities,  the
National  Median  Cost  of Funds  (COFI),  the one-month  or  three-month London
Interbank Offered Rate (LIBOR), the prime rate of a
    
 
                                       5
<PAGE>
   
specific bank, or commercial paper rates. Some indices, such as the one-year CMT
rate, closely mirror changes in market interest rate levels. Others tend to  lag
changes in market rate levels and tend to be somewhat less volatile.
    
 
    CAPS  AND FLOORS.   The underlying  mortgages which  collateralize the ARMS,
CMOs and REMICs in which the Fund  invests will frequently have caps and  floors
which  limit  the maximum  amount  by which  the  loan rate  to  the residential
borrower may change up  or down: (1)  per reset or  adjustment interval and  (2)
over  the life  of the loan.  Some residential mortgage  loans restrict periodic
adjustments by limiting changes in the borrower's monthly principal and interest
payments rather  than limiting  interest rate  changes. These  payment caps  may
result in negative amortization.
 
    The  value of mortgage securities in which  the Fund invests may be affected
if market interest rates rise or fall faster and farther than the allowable caps
or floors on the underlying residential mortgage loans. An example of the effect
of caps and floors on a residential mortgage loan may be found in the  Statement
of  Additional Information. Additionally, even though  the interest rates on the
underlying residential mortgages  are adjustable,  amortization and  prepayments
may  occur, thereby causing the effective  maturities of the mortgage securities
in which  the Fund  invests to  be shorter  than the  maturities stated  in  the
underlying mortgages.
 
    REPURCHASE  AGREEMENTS.   Repurchase  agreements  are arrangements  in which
banks, broker/dealers,  and other  recognized  financial institutions  sell  U.S
government  securities or other securities to the  Fund and agree at the time of
sale to repurchase them at a mutually agreed upon time and price within one year
from the date of acquisition.  To the extent that  the original seller does  not
repurchase  the securities from the  Fund, the Fund could  receive less than the
repurchase price on any sale of such securities.
 
    REVERSE REPURCHASE  AGREEMENTS.   The Fund  may borrow  funds for  temporary
purposes  by entering into reverse repurchase  agreements in accordance with the
investment restrictions described below. Pursuant  to such agreements, the  Fund
would   sell  portfolio  securities  to  financial  institutions  and  agree  to
repurchase them  at an  agreed upon  date  and price.  The Fund  would  consider
entering   into  reverse  repurchase  agreements   to  avoid  otherwise  selling
securities during unfavorable market  conditions. Reverse repurchase  agreements
involve  the risk that the market value  of the portfolio securities sold by the
Fund may decline  below the price  of the  securities the Fund  is obligated  to
repurchase.
 
    DOLLAR  ROLL TRANSACTIONS.  In order to enhance portfolio returns and manage
prepayment risks, the Fund may engage  in dollar roll transactions with  respect
to  mortgage  securities  issued by  GNMA,  FNMA  and FHLMC.  In  a  dollar roll
transaction, the Fund sells a mortgage security to a financial institution, such
as  a  bank  or  broker/dealer,  and  simultaneously  agrees  to  repurchase   a
substantially  similar  (same  type,  coupon, and  maturity)  security  from the
institution at a  later date at  an agreed upon  price. The mortgage  securities
that  are  repurchased will  bear  the same  interest  rate as  those  sold, but
generally will be collateralized by different pools of mortgages with  different
prepayment  histories. During  the period between  the sale  and repurchase, the
Fund will not  be entitled  to receive interest  and principal  payments on  the
securities   sold.  Proceeds  of  the  sale   will  be  invested  in  short-term
instruments, and the income from these investments, together with any additional
fee income received on the sale, will generate income for the Fund exceeding the
yield. When the Fund enters into a dollar roll transaction, liquid assets of the
Fund, in a dollar amount  sufficient to make payment  for the obligations to  be
repurchased, are segregated at the trade date. These assets are marked to market
daily and are maintained until the transaction is settled.
 
    HEDGING  TRANSACTIONS.   To  assist in  reducing  fluctuations in  net asset
value, the Fund  may from time  to time engage  in certain hedging  transactions
involving   exchange  traded   options  or  futures   and  the   short  sale  of
 
                                       6
<PAGE>
these securities and other acceptable investments of the Fund to the extent that
such transactions are in conformity with applicable laws, rules and regulations.
Although the use of hedging strategies is intended to reduce the Fund's exposure
to interest rate volatility, it may cause some fluctuation in net asset value.
 
    ILLIQUID SECURITIES.  The  Fund will not knowingly  invest more than 15%  of
the  value  of  its total  net  assets  in illiquid  securities,  including time
deposits and repurchase  agreements having  maturities longer  than seven  days.
Securities that have readily available market quotations are not deemed illiquid
for  purposes  of  this limitation  (irrespective  of any  legal  or contractual
restrictions on resale). The Fund may invest in commercial obligations issued in
reliance on  the  so-called  "private  placement"  exemption  from  registration
afforded  by Section 4(2)  of the Securities  Act of 1933,  as amended ("Section
4(2) paper"). The  Fund may  also purchase  securities that  are not  registered
under the Securities Act of 1933, as amended, but which can be sold to qualified
institutional  buyers in  accordance with Rule  144A under that  Act ("Rule 144A
securities"). Section  4(2) paper  is  restricted as  to disposition  under  the
federal  securities laws, and generally is  sold to institutional investors such
as the Fund who agree that they are purchasing the paper for investment and  not
with  a view to public  distribution. Any resale by the  purchaser must be in an
exempt transaction. Section 4(2) paper normally is resold to other institutional
investors like  the  Fund  through or  with  the  assistance of  the  issuer  or
investment  dealers who make a market in  the Section 4(2) paper, thus providing
liquidity. Rule  144A  securities generally  must  be sold  to  other  qualified
institutional  buyers. If a particular investment  in Section 4(2) paper or Rule
144A securities is not determined to be liquid, that investment will be included
within the 15% limitation on investment  in illiquid securities. The ability  to
sell  Rule  144A  securities  to  qualified  institutional  buyers  is  a recent
development and it is not possible to predict how this market will mature.
 
    WHEN-ISSUED SECURITIES.    The  Fund  may  also  purchase  securities  on  a
"when-issued"   basis.  When-issued  securities  are  securities  purchased  for
delivery beyond the normal settlement date at a stated price and yield. The Fund
will generally not  pay for such  securities or start  earning interest on  them
until  they  are  received.  Securities purchased  on  a  when-issued  basis are
recorded as an asset and are subject  to changes in value based upon changes  in
the  general  level of  interest  rates. The  Fund  expects that  commitments to
purchase when-issued securities will  not exceed 25% of  the value of its  total
assets  absent unusual market  conditions. The Fund does  not intend to purchase
when-issued securities for speculative purposes  but only in furtherance of  its
investment objective.
 
    LENDING  OF PORTFOLIO SECURITIES.   In order  to generate additional income,
the Fund may lend portfolio securities up to one-third of the value of its total
assets to broker/dealers, banks, or other institutional borrowers of securities.
The Fund will only enter into  loan arrangements with broker/dealers, banks,  or
other  institutions which the Investment Adviser has determined are creditworthy
under guidelines established by  the Fund's Board of  Trustees and will  receive
collateral  in the form of cash or  U.S. government securities equal to at least
100% of the value of the securities loaned.
 
   
    TEMPORARY DEFENSIVE  POSITIONS.    When maintaining  a  temporary  defensive
position,  the Fund may invest its assets, without limit, in any fixed rate U.S.
government securities  and repurchase  agreements,  commercial paper  and  other
short-term  corporate obligations. The Fund's  investment in commercial paper or
corporate obligations  will be  limited  to securities  with  one year  or  less
remaining  to  maturity and  rated  A-1 by  S&P  Corporation or  P-1  by Moody's
Investor Service, Inc.
    
 
    PORTFOLIO TURNOVER.   Although the Fund  does not intend  to invest for  the
purpose  of seeking short-term profits, securities in its portfolio will be sold
whenever the Fund's Investment  Adviser believes it is  appropriate to do so  in
light of the Fund's investment objective, without regard to the length of time a
particular security may have been held.
 
                                       7
<PAGE>
INVESTMENT LIMITATIONS
 
    The  Fund's investment  objective and the  policies described  above are not
fundamental and may be changed by the  Trust's Board of Trustees without a  vote
of  shareholders. If there is a change in the investment objective, shareholders
should consider whether the Fund remains  an appropriate investment in light  of
their   then  current  financial  position  and  needs.  The  Fund's  investment
limitations summarized below may not be changed without the affirmative vote  of
the  holders of a majority of its  outstanding shares. There can be no assurance
that the Fund  will achieve its  investment objective. (A  complete list of  the
investment  limitations that cannot be changed without a vote of shareholders is
contained in the Statement of Additional Information under "Investment Objective
and Policies.")
 
The Fund may not:
 
        1.   Borrow  money,  except that  the  Fund  may (i)  borrow  money  for
    temporary  or emergency purposes (not for leveraging or investment) and (ii)
    engage in reverse repurchase agreements or dollar roll transactions for  any
    purpose;  provided that (i) and (ii)  in combination do not exceed one-third
    of the value of the Fund's total assets (including the amount borrowed) less
    liabilities (other than borrowings).
 
        2.  Purchase any securities which would  cause 25% or more of the  value
    of its total assets at the time of purchase to be invested in the securities
    of  issuers  conducting  their  principal business  activities  in  the same
    industry, provided that there is  no limitation with respect to  investments
    in U.S. government obligations and obligations of domestic banks.
 
   
                  PURCHASE, REDEMPTION AND EXCHANGE OF SHARES
    
 
PURCHASE PROCEDURES
 
    Shares  of the Fund  are sold at the  net asset value per  share of the Fund
next determined  after receipt  of  a purchase  order  by Lehman  Brothers  Inc.
("Lehman  Brothers"), a  Distributor of the  Fund's shares.  Purchase orders for
shares are accepted only on days on  which both Lehman Brothers and the  Federal
Reserve  Bank of Boston are open for  business and must be transmitted to Lehman
Brothers by telephone at 1-800-851-3134 before 4:00 p.m., Eastern time.  Payment
in  federal funds immediately available to  the Custodian, Boston Safe Deposit &
Trust Company,  must be  received before  3:00 p.m.,  Eastern time  on the  next
business  day following  the order.  The Fund may  in its  discretion reject any
order for shares.  (Payment for  orders which are  not received  or accepted  by
Lehman   Brothers  will  be  returned  after   prompt  inquiry  to  the  sending
institution.) Any  person  entitled  to  receive  compensation  for  selling  or
servicing  shares of the Fund may  receive different compensation for selling or
servicing one Class of shares over another Class.
 
    The minimum aggregate initial investment by an institution in the investment
portfolios that comprise  the Trust is  $1 million (with  not less than  $25,000
invested  in  any  one  investment portfolio  offered  by  the  Trust); however,
broker-dealers and other institutional  investors may set  a higher minimum  for
their  customers. To reach the  minimum Trust-wide initial investment, purchases
of shares may be  aggregated over a  period of six months.  There is no  minimum
subsequent investment.
 
   
    Conflict  of interest restrictions may apply  to an institution's receipt of
compensation paid by  the Fund in  connection with the  investment of  fiduciary
funds   in  Select  Shares.  See  also   "Management  of  the  Fund  --  Service
Organizations." Institutions, including  banks regulated by  the Comptroller  of
the  Currency and  investment advisers and  other money managers  subject to the
jurisdiction of the Securities and Exchange Commission, the Department of  Labor
or  state  securities commissions,  are urged  to  consult their  legal advisors
before investing fiduciary funds in Select  Shares. See also "Management of  the
Fund -- Banking Laws."
    
 
                                       8
<PAGE>
    SUBACCOUNTING  SERVICES.  Institutions are  encouraged to open single master
accounts. However, certain  institutions may  wish to use  the transfer  agent's
subaccounting  system to minimize their internal recordkeeping requirements. The
transfer agent  charges a  fee  based on  the  level of  subaccounting  services
rendered.  Institutions holding Fund shares in a fiduciary, agency, custodial or
similar capacity may charge or pass through subaccounting fees as part of or  in
addition  to normal trust or agency account  fees. They may also charge fees for
other services provided which  may be related to  the ownership of Fund  shares.
This  Prospectus should, therefore, be read  together with any agreement between
the customer and the institution with regard to the services provided, the  fees
charged for those services and any restrictions and limitations imposed.
 
REDEMPTION PROCEDURES
 
    Redemption orders must be transmitted to Lehman Brothers by telephone in the
manner  described herein. Shares are  redeemed at the net  asset value per share
next determined  after Lehman  Brothers' receipt  of the  redemption order.  The
proceeds  paid to  a shareholder upon  redemption may  be more or  less than the
amount invested  depending  upon  a share's  net  asset  value at  the  time  of
redemption.
 
    Subject to the foregoing, payment for redeemed shares for which a redemption
order  is received by Lehman  Brothers before 4:00 p.m.,  Eastern time, on a day
that both Lehman Brothers and  the Federal Reserve Bank  of Boston are open  for
business is normally made in federal funds wired to the redeeming shareholder on
the  next business  day following  the redemption  order. The  Fund reserves the
right to  wire  redemption  proceeds  within  seven  days  after  receiving  the
redemption  order  if, in  the judgment  of the  Investment Adviser,  an earlier
payment could adversely affect the Fund.
 
    The Fund shall have the right to redeem involuntarily shares in any  account
at  their net asset value if the value of the account is less than $10,000 after
60 days' prior written notice to  the shareholder. Any such redemption shall  be
effected  at the net asset value per  share next determined after the redemption
order is entered.  If during  the 60 day  period the  shareholder increases  the
value of its account to $10,000 or more, no such redemption shall take place. In
addition,  the  Fund may  redeem shares  involuntarily or  suspend the  right of
redemption as permitted  under the Investment  Company Act of  1940, as  amended
(the  "1940  Act"),  or under  certain  special circumstances  described  in the
Statement of Additional  Information under "Additional  Purchase and  Redemption
Information."
 
    The  ability to give telephone instructions for the redemption (and purchase
or exchange) of shares is automatically established on a shareholder's  account.
However, the Fund reserves the right to refuse a redemption order transmitted by
telephone  if it is believed  advisable to do so.  Procedures for redeeming fund
shares by telephone may  be modified or  terminated at any time  by the Fund  or
Lehman Brothers. In addition, neither the Fund, Lehman Brothers nor the Transfer
Agent will be responsible for the authenticity of telephone instructions for the
purchase, redemption or exchange of shares where the instructions are reasonably
believed  to be genuine. Accordingly,  the investor will bear  the risk of loss.
The Fund will  attempt to confirm  that telephone instructions  are genuine  and
will  use such procedures as are  considered reasonable, including the recording
of telephone instructions. To the extent  that the Fund fails to use  reasonable
procedures  to  verify  the genuineness  of  telephone instructions,  it  or its
service providers  may  be  liable  for  such  instructions  that  prove  to  be
fraudulent or unauthorized.
 
    To  allow  the Fund's  Investment Adviser  to  manage the  Fund effectively,
investors are strongly urged to initiate all investments or redemptions of  Fund
shares  as early in the  day as possible and to  notify Lehman Brothers at least
one day in advance of transactions in excess of $5 million.
 
                                       9
<PAGE>
   
EXCHANGE PROCEDURES
    
   
    The Exchange Privilege enables a shareholder to exchange shares of the  Fund
without  charge for  shares of  other funds  of the  Trust which  have different
investment objectives  that may  be  of interest  to  shareholders. To  use  the
Exchange  Privilege, exchange instructions  must be given  to Lehman Brothers by
telephone. See "Redemption Procedures." In exchanging shares, a shareholder must
meet the minimum initial investment requirement of the other fund and the shares
involved must be legally available for  sale in the state where the  shareholder
resides. Before any exchange, the shareholder must also obtain and should review
a  copy of  the prospectus of  the fund into  which the exchange  is being made.
Prospectuses may be  obtained from  Lehman Brothers  by calling  1-800-368-5556.
Shares will be exchanged at the net asset value next determined after receipt of
an  exchange request  in proper  form. The  exchange of  shares of  one fund for
shares of another fund is treated for  Federal Income Tax purposes as a sale  of
the  shares given in  exchange by the shareholder  and, therefore, a shareholder
may realize a taxable gain  or loss. The Fund reserves  the right to reject  any
exchange  request in whole or in part. The Exchange Privilege may be modified or
terminated at any time upon notice to shareholders.
    
 
VALUATION OF SHARES--NET ASSET VALUE
 
    The Fund's net asset  value per share for  purposes of pricing purchase  and
redemption  orders is  determined by the  Fund's Administrator as  of 4:00 p.m.,
Eastern time, on  each weekday, with  the exception of  those holidays on  which
either  the New  York Stock Exchange  or the  Federal Reserve Bank  of Boston is
closed. Currently, one or both of these institutions are closed on the customary
national business  holidays of  New Year's  Day, Martin  Luther King,  Jr.  Day,
Presidents'   Day,  Good  Friday,  Memorial  Day  (observed),  Independence  Day
(observed),  Labor  Day,  Columbus  Day,  Veterans  Day,  Thanksgiving  Day  and
Christmas  Day. The net  asset value per  share of Fund  shares is calculated by
adding the value  of all securities  and other assets  of the Fund,  subtracting
liabilities,  and  dividing  the  result  by  the  total  number  of  the Fund's
outstanding shares (irrespective of  class or sub-class).  The Fund's net  asset
value  per  share for  purposes  of pricing  purchase  and redemption  orders is
determined independently of the net asset value of the Trust's other  investment
portfolios.
 
OTHER MATTERS
 
    Fund  shares are sold and redeemed without charge by the Fund. Institutional
investors purchasing  or holding  Fund shares  for their  customer accounts  may
charge  customers  fees  for  cash management  and  other  services  provided in
connection with their accounts. A customer should, therefore, consider the terms
of its account with an institution before purchasing Fund shares. An institution
purchasing or redeeming Fund  shares on behalf of  its customers is  responsible
for  transmitting  orders to  Lehman Brothers  in  accordance with  its customer
agreements.
 
                                   DIVIDENDS
 
    Shareholders of the Fund are entitled to dividends and distributions arising
only from  the  net investment  income  and capital  gains,  if any,  earned  on
investments held by the Fund. The Fund's net investment income is declared daily
as  a dividend to shares held  of record at the close  of business on the day of
declaration. Shares begin accruing dividends on the next business day  following
receipt  of  the purchase  order  and continue  to  accrue dividends  up  to and
including the day  that such  shares are  redeemed. Dividends  are paid  monthly
within  five business days  after the end  of the month  or within five business
days after a redemption of all of a shareholder's shares of a particular  class.
Net capital gains distributions, if any, will be made annually.
 
                                       10
<PAGE>
   
    Dividends  are determined in the same manner and are paid in the same amount
for each Fund  share, except that  Select Shares  bear all the  expense of  Rule
12b-1  distribution fees paid with  respect to such shares.  As a result, at any
given time, the net yield on Select Shares  will be lower than the net yield  on
Institutional Shares and higher than the net yield on Premier Shares.
    
 
    Institutional  shareholders may elect to  have their dividends reinvested in
additional full and fractional shares of  the same class of shares with  respect
to  which such dividends are  declared at the net asset  value of such shares on
the payment  date.  Reinvested  dividends  receive the  same  tax  treatment  as
dividends  paid in cash. Such election, or  any revocation thereof, must be made
in writing to  The Shareholder Services  Group, Inc. ("TSSG"),  a subsidiary  of
First  Data  Corporation  and  the  Fund's transfer  agent,  at  P.O.  Box 9690,
Providence, Rhode Island 02940-9690, and will become effective after its receipt
by TSSG, with respect to dividends paid.
 
    TSSG, as transfer agent, will send  each Fund shareholder or its  authorized
representative  an  annual  statement designating  the  amount, if  any,  of any
dividends and  distributions  made  during  each  year  and  their  federal  tax
qualification.
 
                                     TAXES
 
    The  Fund intends to  qualify each year as  a "regulated investment company"
under the Internal Revenue  Code of 1986, as  amended (the "Code"). A  regulated
investment  company is exempt from federal  income tax on amounts distributed to
its shareholders.
 
    Qualification as a regulated investment company under the Code for a taxable
year requires, among other things, that the Fund distribute to its  shareholders
at least 90% of its investment company taxable income for such year. In general,
the  Fund's  investment  company  taxable  income  will  be  its  taxable income
(including dividends and short-term  capital gains, if  any) subject to  certain
adjustments  and excluding the excess of any  net long-term capital gain for the
taxable year over the net  short-term capital loss, if  any, for such year.  The
Fund  intends to distribute substantially all  of its investment company taxable
income each year. Such distributions will be taxable as ordinary income to  Fund
shareholders  who are  not currently exempt  from federal  income taxes, whether
such income is  received in cash  or reinvested in  additional shares.  (Federal
income  taxes for  distributions to  an IRA or  a qualified  retirement plan are
deferred  under  the  Code.)  It  is   anticipated  that  none  of  the   Fund's
distributions  will  be  eligible  for  the  dividends  received  deduction  for
corporations.
 
    Dividends declared in October, November or  December of any year payable  to
shareholders of record on a specified date in such months will be deemed to have
been  received by the shareholders  and paid by the Fund  on December 31 of such
year in  the  event such  dividends  are actually  paid  during January  of  the
following year. Shareholders will be advised at least annually as to the federal
income tax status of distributions made to them each year.
 
    The  foregoing discussion is only  a brief summary of  some of the important
federal tax considerations generally affecting the Fund and its shareholders. As
noted above, IRAs receive special tax treatment. No attempt is made to present a
detailed explanation of the federal, state or local income tax treatment of  the
Fund  or its shareholders, and  this discussion is not  intended as a substitute
for careful tax planning.  Accordingly, potential investors  in the Fund  should
consult their tax advisors with specific reference to their own tax situation.
 
                             MANAGEMENT OF THE FUND
 
    The  business and affairs of the Fund are managed under the direction of the
Trust's Board  of  Trustees. The  Trustees  approve all  significant  agreements
between    the   Trust   and    the   persons   or    companies   that   furnish
 
                                       11
<PAGE>
services to the  Fund, including  agreements with  its Distributors,  Investment
Adviser,  Administrator, Custodian and Transfer Agent. The day-to-day operations
of the Fund are  delegated to the Fund's  Investment Adviser and  Administrator.
One Trustee and all of the Trust's officers are affiliated with Lehman Brothers,
The  Boston Company Advisors, Inc. or one  of their affiliates. The Statement of
Additional  Information  relating  to  the  Fund  contains  general   background
information regarding each Trustee and executive officer of the Trust.
 
INVESTMENT ADVISER--LEHMAN BROTHERS GLOBAL ASSET MANAGEMENT INC.
 
   
    Lehman  Brothers Global Asset Management Inc.  ("LBGAM"), located at 3 World
Financial Center, New  York, New  York 10285,  serves as  the Fund's  Investment
Adviser.  LBGAM is  a wholly owned  subsidiary of Lehman  Brothers Holdings Inc.
("Holdings"). All of the issued  and outstanding common stock (representing  92%
of  the voting stock)  of Holdings is  held by American  Express Company. LBGAM,
together with other  Lehman Brothers investment  advisory affiliates, serves  as
investment  adviser to investment companies and  private accounts and has assets
under management in excess of $17 billion.
    
 
    As Investment Adviser  to the Fund,  LBGAM manages the  Fund's portfolio  in
accordance   with  its  investment  objective  and  policies,  makes  investment
decisions for  the Fund,  places  orders to  purchase  and sell  securities  and
employs  professional  portfolio managers  and  securities analysts  who provide
research services to the Fund. For its  services LBGAM is entitled to a  monthly
fee  by the Fund at the  annual rate of .30% of  the value of the Fund's average
daily net assets.
 
    Kirk D. Hartman,  a Managing  Director of  LBGAM, has  been associated  with
Lehman  Brothers  in the  Mortgage  Department since  1987.  Mr. Hartman  is the
portfolio manager primarily responsible  for managing the day-to-day  operations
of  the Fund, including the making of investment selections. Mr. Hartman will be
assisted by Andrew  J. Stenwall,  a Vice President  of LBGAM.  Mr. Hartman  will
manage the Fund as of commencement of operations.
 
ADMINISTRATOR--THE BOSTON COMPANY ADVISORS, INC.
 
    The  Boston  Company  Advisors,  Inc. ("Boston  Advisors"),  located  at One
Exchange Place, Boston, Massachusetts 02109, serves as the Fund's Administrator.
Boston Advisors is a wholly owned subsidiary of The Boston Company, Inc.,  which
is in turn a wholly owned subsidiary of Boston Group Holdings, Inc. ("BGH"). BGH
is  a  wholly owned  subsidiary of  Mellon  Bank Corporation.  As Administrator,
Boston Advisors  calculates  the  net  asset value  of  the  Fund's  shares  and
generally  assists in all aspects of the Fund's administration and operation. As
compensation for its services as Administrator, Boston Advisors is entitled to a
monthly fee at the annual rate of .10% of the value of the Fund's average  daily
net assets.
 
DISTRIBUTORS
 
    Lehman  Brothers, located  at 3 World  Financial Center, New  York, New York
10285, is a Distributor of the Fund. Lehman Brothers, a wholly owned  subsidiary
of  Holdings, is one of the leading  full-line investment firms serving the U.S.
and foreign securities and commodities markets. American Express Company and its
subsidiaries, other  than  Lehman  Brothers,  are  principally  engaged  in  the
businesses   of   providing   travel-related   services,   investment  services,
information services, international banking services and investors'  diversified
financial  services. Funds Distributor Inc., a wholly owned subsidiary of Lehman
Brothers located at One Exchange Place, Boston, Massachusetts 02109, also serves
as a distributor of the Fund.
 
SERVICE ORGANIZATIONS
 
   
    Under a Plan  of Distribution (the  "Plan") adopted pursuant  to Rule  12b-1
under  the 1940 Act, Select Shares bear  fees ("Rule 12b-1 fees") payable by the
Fund at the aggregate rate of up to .35% (on an annualized basis) of the average
daily net asset value  of such shares to  Lehman Brothers for providing  certain
services to the Fund
    
 
                                       12
<PAGE>
   
and  holders of Select Shares. Lehman Brothers  may retain all the payments made
to it under the Plan or may enter  into agreements with and make payments of  up
to  .35% to institutional investors such as banks, savings and loan associations
and other financial institutions ("Service Organizations") for the provision  of
a  portion of such services.  These services, which are  described more fully in
the Statement  of  Additional Information  under  "Management of  the  Funds  --
Service   Organizations,"  include  aggregating   and  processing  purchase  and
redemption requests from  shareholders and placing  net purchase and  redemption
orders  with  Lehman Brothers;  processing dividend  payments  from the  Fund on
behalf of  shareholders;  providing  information  periodically  to  shareholders
showing  their  positions in  shares; arranging  for  bank wires;  responding to
shareholder inquiries relating to  the services provided  by Lehman Brothers  or
the  Service Organization and handling correspondence; and acting as shareholder
of record and nominee. The Plan  of Distribution also allows Lehman Brothers  to
use its own resources to provide distribution services and shareholder services.
Under the terms of the agreements, Service Organizations are required to provide
to  their shareholders a schedule of any  fees that they may charge shareholders
in connection with their investments in Select Shares.
    
 
EXPENSES
 
   
    The Fund bears  all its  own expenses.  The Fund's  expenses include  taxes,
interest,  fees and salaries  of the Trust's  trustees and officers  who are not
directors, officers or employees of  the Fund's service contractors,  Securities
and  Exchange  Commission fees,  state securities  qualification fees,  costs of
preparing and printing prospectuses for regulatory purposes and for distribution
to shareholders, advisory  and administration  fees, charges  of the  custodian,
transfer  agent  and  dividend  disbursing  agent,  certain  insurance premiums,
outside  auditing  and  legal  expenses,   costs  of  shareholder  reports   and
shareholder  meetings and  any extraordinary  expenses. The  Fund also  pays for
brokerage fees and commissions (if any) in connection with the purchase and sale
of portfolio securities. In order to maintain a competitive expense ratio, LBGAM
has agreed voluntarily to waive its fee or  to reimburse the Fund if and to  the
extent that the Fund's total operating expenses exceed .75% of average daily net
assets.  This  voluntary waiver  and reimbursement  will  not be  changed unless
shareholders are provided  at least 60  days' advance notice.  In addition,  the
Investment  Adviser has agreed to  reimburse the Fund to  the extent required by
applicable state law for certain expenses that are described in the Statement of
Additional Information relating to the  Fund. Any fees charged by  institutional
investors  to their customers in connection  with investments in Fund shares are
not reflected in the Fund's expenses.
    
 
BANKING LAWS
 
    Banking laws  and  regulations presently  prohibit  a bank  holding  company
registered  under the Federal  Bank Holding Company  Act of 1956  or any bank or
non-bank  affiliate  thereof  from  sponsoring,  organizing,  or  controlling  a
registered,  open-end investment company engaged continuously in the issuance of
its shares and prohibit banks generally from issuing, underwriting, selling,  or
distributing  securities such as Fund shares.  Such banking laws and regulations
do not prohibit  such a  holding company or  affiliate or  banks generally  from
acting  as investment adviser, transfer agent or custodian to such an investment
company or from purchasing  shares of such  a company for or  upon the order  of
customers.  Some Service Organizations  may be subject to  such banking laws and
regulations. In addition, state  securities laws on this  issue may differ  from
the  interpretation  of federal  law expressed  herein  and banks  and financial
institutions may be required to register as dealers pursuant to state law.
 
   
    Should future  legislative, judicial  or administrative  action prohibit  or
restrict  the  activities  of  bank Service  Organizations,  the  Fund  might be
required to alter or discontinue its arrangements with Service Organizations and
change its  method  of operations  with  respect to  Select  Shares. It  is  not
anticipated,  however, that any change in  the Fund's method of operations would
affect its  net asset  value per  share or  result in  a financial  loss to  any
customer.
    
 
                                       13
<PAGE>
                            PERFORMANCE INFORMATION
 
   
    From  time to  time, in  advertisements or  in reports  to shareholders, the
"total return," "yields" and "effective yields" for shares may be quoted.  Total
return  and yield quotations  are computed separately for  each class of shares.
"Total return" for a  particular class of shares  represents the change, over  a
specified  period of  time, in the  value of  an investment in  the shares after
reinvesting all  income and  capital  gain distributions.  It is  calculated  by
dividing that change by the initial investment and is expressed as a percentage.
The  "yield" quoted in advertisements for a particular class of shares refers to
the income generated  by an investment  in such shares  over a specified  period
(such  as a 30-day period) identified in  the advertisement. This income is then
"annualized"; that is, the amount of  income generated by the investment  during
that  period  is assumed  to be  generated each  such period  over a  52-week or
one-year period and is shown as  a percentage of the investment. The  "effective
yield"  is calculated  similarly but, when  annualized, the income  earned by an
investment in a  particular class is  assumed to be  reinvested. The  "effective
yield"  will  be slightly  higher than  the "yield"  because of  the compounding
effect of this assumed reinvestment.
    
 
    Distribution  rates  may  also  be  quoted  for  the  Fund.  Quotations   of
distribution rates are calculated by annualizing the most recent distribution of
net  investment income  for a  monthly, quarterly  or other  relevant period and
dividing this amount by the ending net asset value for the period for which  the
distribution rates are being calculated.
 
   
    The  Fund's performance may be  compared to that of  other mutual funds with
similar objectives, to stock or other relevant indices, or to rankings  prepared
by independent services or other financial or industry publications that monitor
the performance of mutual funds. For example, such data are reported in national
financial  publications such as MORNINGSTAR, INC., BARRON'S, IBC/DONOGHUE'S INC.
BOND FUND  REPORT, THE  WALL STREET  JOURNAL  and THE  NEW YORK  TIMES,  reports
prepared  by Lipper  Analytical Services,  Inc. and  publications of  a local or
regional nature. The Fund's Lipper ranking  in the "U.S. Mortgage Fund" or  "ARM
Fund"  categories may also be quoted from  time to time in advertising and sales
literature.
    
 
   
    THE FUND'S TOTAL RETURN  AND YIELD FIGURES FOR  A CLASS OF SHARES  REPRESENT
PAST  PERFORMANCE, WILL FLUCTUATE AND SHOULD NOT BE CONSIDERED AS REPRESENTATIVE
OF FUTURE RESULTS. The performance of any investment is generally a function  of
portfolio  quality and maturity, type of  investment and operating expenses. Any
fees  charged  by  institutional  investors  directly  to  their  customers   in
connection  with  investments in  Fund shares  are not  reflected in  the Fund's
expenses, total return or yields; and,  such fees, if charged, would reduce  the
actual  return received by  customers on their investments.  The methods used to
compute the Fund's total return and yields  are described in more detail in  the
Statement  of Additional Information. Investors  may call 1-800-238-2560 (Select
Shares Code: 212) to obtain current performance information.
    
 
                             DESCRIPTION OF SHARES
 
   
    The Trust  is a  Massachusetts business  trust established  on November  25,
1992. The Trust's Declaration of Trust authorizes the Board of Trustees to issue
an  unlimited number of full and fractional shares of beneficial interest in the
Trust and  to  classify or  reclassify  any unissued  shares  into one  or  more
additional  classes of shares. Pursuant to  such authority, the Trust has issued
three classes  of shares  for twelve  investment portfolios  of the  Trust.  The
Declaration  of Trust further authorizes the  Trustees to classify or reclassify
any class  of shares  into one  or more  sub-classes. The  issuance of  separate
classes  of  shares  is  intended  to address  the  different  service  needs of
different types of investors.  Each share represents interests  in each Fund  in
proportion  to  each share's  net  asset value,  except  that shares  of certain
classes bear fees and expenses for certain shareholder services or  distribution
and support services provided to that class.
    
 
                                       14
<PAGE>
    As  a Massachusetts business trust, the Trust is not required to hold annual
meetings of shareholders. However, the Trust will call a meeting of shareholders
where required by law for purposes such  as voting upon the question of  removal
of a member of the Board of Trustees upon written request of shareholders owning
at  least  10%  of  the  outstanding  shares  of  the  Trust  entitled  to vote.
Shareholders of the  Trust are entitled  to one  vote for each  full share  held
(irrespective  of class or portfolio) and fractional votes for fractional shares
held.
 
   
    In addition to Select Shares, the Fund currently offers Institutional Shares
and Premier Shares. Institutional Shares are sold to institutions that have  not
entered  into servicing  or other  agreements with  the Fund  in connection with
their investments and pay no Rule 12b-1 distribution or shareholder service fee.
Premier Shares are offered by  Lehman Brothers directly to individual  investors
under  the Plan of Distribution adopted pursuant  to Rule 12b-1. Pursuant to the
Plan of Distribution, the Fund has agreed  to pay Lehman Brothers a monthly  fee
at  an annual rate  of up to  .50% of the  average daily net  asset value of the
Premier Shares  for  distribution and  other  services provided  to  holders  of
Premier  Shares. Premier Shares will bear all fees paid for services provided to
that class under the Plan of Distribution.
    
 
                                       15
<PAGE>
                LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
 
                            Prime Money Market Fund
                         Prime Value Money Market Fund
                    Government Obligations Money Market Fund
                 100% Government Obligations Money Market Fund
                   Treasury Instruments Money Market Fund II
                  100% Treasury Instruments Money Market Fund
                          Municipal Money Market Fund
                           Tax-Free Money Market Fund
                     California Municipal Money Market Fund
                       Floating Rate U.S. Government Fund
                      Short Duration U.S. Government Fund
 
                            ------------------------
 
NO  PERSON  HAS  BEEN  AUTHORIZED  TO  GIVE  ANY  INFORMATION  OR  TO  MAKE  ANY
REPRESENTATIONS NOT CONTAINED IN THIS PROSPECTUS, OR IN THE FUND'S STATEMENT  OF
ADDITIONAL  INFORMATION INCORPORATED HEREIN BY REFERENCE, IN CONNECTION WITH THE
OFFERING MADE BY  THIS PROSPECTUS  AND, IF GIVEN  OR MADE,  SUCH INFORMATION  OR
REPRESENTATIONS  MUST NOT BE RELIED UPON AS  HAVING BEEN AUTHORIZED BY THE TRUST
OR ITS DISTRIBUTORS.  THIS PROSPECTUS  DOES NOT  CONSTITUTE AN  OFFERING BY  THE
TRUST  OR BY THE DISTRIBUTORS IN ANY JURISDICTION IN WHICH SUCH OFFERING MAY NOT
LAWFULLY BE MADE.
 
                              -------------------
 
                               TABLE OF CONTENTS
 

[CAPTION]
                                                 PAGE
                                                 -----
                                           
Background and Expense Information..........           2
Investment Objective and Policies...........           2
Purchase, Redemption and Exchange of
 Shares.....................................           8
Dividends...................................          10
Taxes.......................................          11
Management of the Fund......................          11
Performance Information.....................          14
Description of Shares.......................          14

 
                                 FLOATING RATE
                              U.S. GOVERNMENT FUND
 
                              -------------------
 
                                   PROSPECTUS
                               February 21, 1994
 
                             ---------------------
 
                                LEHMAN BROTHERS
 
THIS PROSPECTUS AND THE STATEMENT OF ADDITIONAL INFORMATION INCORPORATED  HEREIN
RELATE  PRIMARILY TO  THE FUND  AND DESCRIBE  ONLY THE  INVESTMENT OBJECTIVE AND
POLICIES,  OPERATIONS,  CONTRACTS  AND  OTHER  MATTERS  RELATING  TO  THE  FUND.
INVESTORS  WISHING  TO OBTAIN  SIMILAR INFORMATION  REGARDING THE  TRUST'S OTHER
PORTFOLIOS MAY OBTAIN SEPARATE PROSPECTUSES DESCRIBING THEM BY CONTACTING LEHMAN
BROTHERS AT 1-800-368-5556.
   
Lehman Brothers
Floating Rate U.S. Government Fund
    
An Investment Portfolio Offered By
Lehman Brothers Institutional Funds Group Trust
   
	Lehman Brothers Institutional Funds Group Trust (the "Trust") is an 
open-end, management investment company.  The shares described in this 
Prospectus represent interests in a class of shares ("Premier Shares") of the 
Floating Rate U.S. Government Fund (the "Fund"), a diversified investment 
portfolio of the Trust.
    

	The Fund's investment objective is to provide a high level of current 
income consistent with minimal fluctuation of net asset value.  The Fund 
invests primarily in a portfolio consisting of U.S. government and agency 
securities, including floating rate and adjustable rate mortgage securities, 
and repurchase agreements collateralized by such obligations. 

   
	Lehman Brothers Inc. sponsors the Fund and acts as Distributor of its 
shares.  Lehman Brothers Global Asset Management Inc. serves as the Fund's 
Investment Adviser.
    
	The address of the Fund is One Exchange Place, Boston, Massachusetts 
02109.  Yield and other information may be obtained through a Lehman Brothers 
Investment Representative. 

   
	This Prospectus briefly sets forth certain information about the Fund 
that investors should know before investing.  Investors are advised to read 
this Prospectus and retain it for future reference.  Additional information 
about the Fund, contained in a Statement of Additional Information dated 
February 21, 1994, as amended or supplemented from time to time, has been 
filed with the Securities and Exchange Commission and is available to 
investors without charge by calling the Fund's Transfer Agent at 1-800-451-
2010.  The Statement of Additional Information is incorporated in its entirety 
by reference into this Prospectus.
    
	Shares of the Fund are not deposits or obligations of, or guaranteed or 
endorsed by, any bank, and such shares are not federally insured by the 
Federal Deposit Insurance Corporation, the Federal Reserve Board or any other 
government agency.  Shares of the Fund involve certain investment risks, 
including the possible loss of principal.
___________

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

___________

LEHMAN BROTHERS
   
February 21, 1994
    


BACKGROUND AND EXPENSE INFORMATION
   
	The Fund currently offers three separate classes of shares, only one of 
which, Premier Shares, is offered by this Prospectus.  Each class represents 
an equal, pro rata interest in the Fund.  Each share accrues daily dividends 
in the same manner, except that Premier Shares bear fees payable by the Fund 
to Lehman Brothers for services it provides to the beneficial owners of such 
shares.  See "Management of the Fund - Shareholder Services."
    
	The purpose of the following table is to assist an investor in 
understanding the various costs and expenses that an investor in the Fund 
would bear directly or indirectly.  For more complete descriptions of the 
various costs and expenses, see "Management of the Fund" in this Prospectus 
and the Statement of Additional Information.

Expense Summary

									



	Annual Fund Operating Expenses
(as a percentage of average net assets)


	Advisory Fees (net of waivers)	
   .17%

	Rule 12b-1 fees	
   .50

	Other Expenses-including Administration 
Fees	
   .23__
__

	Total Fund Operating Expenses (after 
expense reimbursement)	

   .90  
   



_____

[CAPTION]
Example




	You would pay the following expenses on a 
$1,000 investment, assuming (1) a 5% annual 
return and (2) redemption at the end of each 
time period with respect to the following 
shares:
[CAPTION]




1 Year

3 Years



$9
$29



THE FOREGOING SHOULD NOT BE CONSIDERED A REPRESENTATION OF ACTUAL EXPENSES AND 
RATE OF RETURN, WHICH MAY BE GREATER OR LESSER THAN THOSE SHOWN.

   
	The Fund's Investment Adviser has voluntarily agreed to waive its fee or 
reimburse the Fund to the extent necessary to maintain the Fund's annualized 
expense ratio at .90%.  The voluntary waiver or reimbursement will not be 
changed unless shareholders are provided at least 60 days' advance notice.  In 
addition, the Administrator may waive a portion of its fees which will assist 
in achieving this expense ratio.  Absent waivers or reimbursement of expenses, 
Advisory Fees with respect to Premier Shares would be .30% annually, Other 
Expenses would be .25% annually and the Total Fund Operating Expenses would be 
1.05%, of the Fund's average daily net assets.  The foregoing table has not 
been audited by the Fund's independent accountants. 
    


INVESTMENT OBJECTIVE AND POLICIES

	The investment objective of the Fund is to provide a high level of 
current income consistent with minimal fluctuation of net asset value.  
Current income includes, in general, discount earned on U.S. Treasury bills 
and agency discount notes, interest earned on mortgage-related securities and 
other U.S. government and agency securities, and short-term capital gains.  
While there can be no assurance that the Fund will be able to maintain minimal 
fluctuation of net asset value or that it will achieve its investment 
objective, the Fund endeavors to do so by following the investment policies 
described in this Prospectus.

   
	The Fund pursues its investment objective by investing primarily in a 
professionally managed portfolio of adjustable rate or floating rate U.S. 
government and agency securities which are issued or guaranteed as to payment 
of principal and interest by the U.S. government, its agencies or 
instrumentalities.  As a mutual fund with "Floating Rate U.S. Government" in 
its name, under normal market conditions, the Fund must invest at least 65% of 
its portfolio in such instruments.
    
Duration
   
	Under normal interest rate conditions, the Fund's average portfolio 
duration will be between that of a six-month and a one-year U.S. Treasury Bill 
(approximately 0.5 to one year).  This means that the Fund's net asset value 
fluctuation is expected to be similar to the price fluctuation of a one-year 
U.S. Treasury Bill.  The Fund's average portfolio duration is not expected to 
exceed that of a two-year U.S. Treasury Note (approximately 1.9 years).  In 
computing the average duration of its portfolio, the Fund will estimate the 
duration of obligations that are subject to prepayment or redemption by the 
issuer, taking into account the influence of interest rates on prepayments and 
coupon flows.  Maturity, in contrast to duration, measures only the time until 
final payment is due on an investment; it does not take into account the 
pattern of a security's cash flow over time, including how cash flow is 
affected by prepayments and by changes in interest rates.
    
   
Acceptable Investments
    
	The types of mortgage securities in which the Fund may invest include 
the following:

*	adjustable rate mortgage securities;

*	collateralized mortgage obligations;

*	real estate mortgage investment conduits; and

*	other securities collateralized by or representing interests in real 
estate mortgages whose interest rates reset at periodic intervals and are 
issued or guaranteed by the U.S. government, its agencies or 
instrumentalities.

	In addition to the securities described above, the Fund may also invest 
in direct obligations of the U.S. Treasury, such as U.S. Treasury bills, 
notes, and bonds, as well as obligations of U.S. government agencies or 
instrumentalities which are not collateralized by or represent interests in 
real estate mortgages.

	The Fund may also invest in mortgage-related securities which are issued 
by private entities such as investment banking firms and companies related to 
the construction industry.  The privately issued mortgage-related securities 
in which the Fund may invest include:

*	privately issued securities which are collateralized by pools of 
mortgages in which each mortgage is guaranteed as to payment of principal and 
interest by an agency or instrumentality of the U.S. government;

*	privately issued securities which are collateralized by pools of 
mortgages in which payment of principal and interest are guaranteed by the 
issuer and such guarantee is collateralized by U.S. government securities; and

*	other privately issued securities in which the proceeds of the issuance 
are invested in mortgage-backed securities and payment of the principal and 
interest are supported by the credit of any agency or instrumentality of the 
U.S. government.

	The privately issued mortgage-related securities provide for a periodic 
payment consisting of both interest and principal.  The interest portion of 
these payments will be distributed by the Fund as income, and the capital 
portion will be reinvested.

Description of Acceptable Investments
   
	Adjustable Rate Mortgage Securities ("ARMS").  ARMS are pass-through 
mortgage securities with adjustable rather than fixed interest rates.  The 
ARMS in which the Fund invests are issued by Government National Mortgage 
Association ("GNMA"), Federal National Mortgage Association ("FNMA") and 
Federal Home Loan Corporation ("FHLMC") and are actively traded.  The 
underlying mortgages which collateralize ARMS issued by GNMA are fully 
guaranteed by the Federal Housing Administration ("FHA") or Veterans 
Administration ("VA"), while those collateralizing ARMS issued by FHLMC or 
FNMA are typically conventional residential mortgages conforming to strict 
underwriting size and maturity constraints.
    
	Unlike conventional bonds, ARMS pay back principal over the life of the 
ARMS rather than at maturity.  Thus, a holder of the ARMS, such as the Fund, 
would receive monthly scheduled payments of principal and interest and may 
receive unscheduled principal payments representing payments on the underlying 
mortgages.  At the time that a holder of the ARMS reinvests the payments and 
any unscheduled prepayments of principal that it receives, the holder may 
receive a rate of interest paid on the existing ARMS.  As a consequence, ARMS 
may be a less effective means of "locking in" long-term interest rates than 
other types of U.S. government securities.

	Not unlike other U.S. government securities, the market value of ARMS 
will generally vary inversely with changes in market interest rates.  Thus, 
the market value of ARMS generally declines when interest rates rise and 
generally rises when interest rates decline.

	While ARMS generally entail less risk of a decline during periods of 
rapidly rising rates, ARMS may also have less potential for capital 
appreciation than other similar investments (e.g., investments with comparable 
maturities) because, as interest rates decline, the likelihood increases that 
mortgages will be prepaid.  Furthermore, if ARMS are purchased at a premium, 
mortgage foreclosures and unscheduled principal payments may result in some 
loss of a holder's principal investment to the extent of the premium paid.  
Conversely, if ARMS are purchased at a discount, both a scheduled payment of 
principal and an unscheduled prepayment of principal would increase current 
and total returns and would accelerate the recognition of income, which would 
be taxed as ordinary income when distributed to shareholders.

   
	Collateralized Mortgage Obligations ("CMOs").  CMOs are bonds issued by 
single-purpose, stand-alone finance subsidiaries or trusts of financial 
institutions, government agencies, investment banks or companies related to 
the construction industry.  CMOs purchased by the Fund may be:
    
*	collateralized by pools of mortgages in which each mortgage is 
guaranteed as to payment of principal and interest by an agency or 
instrumentality of the U.S. government;

*	collateralized by pools of mortgages in which payment of principal and 
interest is guaranteed by the issuer and such guarantee is collateralized by 
U.S. government securities; or

*	securities in which the proceeds of the issuance are invested in 
mortgage securities and payment of the principal and interest are supported by 
the credit of an agency or instrumentality of the U.S. government.

	All CMOs purchased by the Fund are investment grade, as rated by a 
nationally recognized statistical rating organization.

	Real Estate Mortgage Investment Conduits ("REMICs").  REMICs are 
offerings of multiple class real estate mortgage-backed securities which 
qualify and elect treatment as such under provisions of the Internal Revenue 
Code.  Issuers of REMICs may take several forms, such as trusts, partnerships, 
corporations, associations or a segregated pool of mortgages.  Once REMIC 
status is elected and obtained, the entity is not subject to federal income 
taxation.  Instead, income is passed through the entity and is taxed to the 
person or persons who hold interests in the REMIC.  A REMIC interest must 
consist of one or more classes of "regular interests," some of which may offer 
adjustable rates (the type in which the Fund primarily invests), and a single 
class of "residual interests".  To qualify as a REMIC, substantially all of 
the assets of the entity must be in assets directly or indirectly secured 
principally by real property.

	Stripped Mortgage-Backed Securities ("SMBS")	.  The Fund may invest 
up to 10% of its total assets in SMBS, which are derivative multiclass 
mortgage securities.  The Fund may only invest in SMBS issued or guaranteed by 
the U.S. Government, its agencies or instrumentalities.  SMBS are usually 
structured with two classes that receive different proportions of the interest 
and principal distributions from a pool of mortgage assets, which may consist 
of mortgage loans or guaranteed mortgage pass-through certificates.  A common 
type of SMBS will have one class receiving all or a portion of the interest 
from the mortgage assets, while the other class will receive all of the 
principal. Moreover, in some instances, one class will receive some of the 
interest and most of the principal while the other class will receive most of 
the interest and the remainder of the principal.  If the underlying mortgage 
assets experience greater than anticipated prepayments of principal, there may 
no longer be interest paid on some of the underlying mortgage loans and the 
Fund, as a result, may fail to fully recoup its initial investment in these 
securities.  Although the market for such securities is increasingly liquid, 
certain SMBS may not be readily marketable and will be considered illiquid for 
purposes of the Fund's limitation on investments in illiquid securities.  The 
market value of the class consisting entirely of principal payments generally 
is unusually sensitive to changes in interest rates.  The market value of the 
class consisting entirely of interest payments is extremely sensitive not only 
to changes in interest rates but also to the rate of principal payments, 
including prepayments, on the related underlying mortgage assets.  The yields 
on a class of SMBS that receives all or most of the interest from mortgage 
assets are generally higher than prevailing market yields on other mortgage-
backed securities because their cash flow patterns are more variable and there 
is a greater risk that the initial investment will not be fully recouped.  The 
Investment Adviser will seek to manage these risks (and potential benefits) by 
investing in a variety of such securities and by using certain hedging 
techniques.

Other Investments and Practices
   
	Resets.  The interest rates paid on the ARMS, CMOs and REMICs in which 
the Fund invests generally are readjusted or reset at intervals of one year or 
less to an increment over some predetermined interest rate index.  There are 
two main categories of indices:  those based on U.S. Treasury securities and 
those derived from a calculated measure, such as a cost of funds index or a 
moving average of mortgage rates.  Commonly utilized indices include the one-
year and five-year Constant Maturity Treasury (CMT) rates, the three-month 
Treasury Bill rate, the 180-day Treasury Bill rate, rates on longer-term 
Treasury securities, the National Median Cost of Funds (COFI), the one-month 
or three-month London Interbank Offered Rate (LIBOR), the prime rate of a 
specific bank, or commercial paper rates.  Some indices, such as the one-year 
CMT rate, closely mirror changes in market interest rate levels.  Others tend 
to lag changes in market rate levels and tend to be somewhat less volatile.
    
	Caps and Floors.  The underlying mortgages which collateralize the ARMS, 
CMOs and REMICs in which the Fund invests may have caps and floors which limit 
the maximum amount by which the loan rate to the residential borrower may 
change up or down:  (1) per reset or adjustment interval and (2) over the life 
of the loan.  Some residential mortgage loans restrict periodic adjustments by 
limiting changes in the borrower's monthly principal and interest payments 
rather than limiting interest rate changes.  These payment caps may result in 
negative amortization.

	The value of mortgage securities in which the Fund invests may be 
affected if market interest rates rise or fall faster and farther than the 
allowable caps or floors on the underlying residential mortgage loans.  An 
example of the effect of caps and floors on a residential mortgage loan may be 
found in the Statement of Additional Information.  Additionally, even though 
the interest rates on the underlying residential mortgages are adjustable, 
amortization and prepayments may occur, thereby causing the effective 
maturities of the mortgage securities in which the Fund invests to be shorter 
than the maturities stated in the underlying mortgages.

	Repurchase Agreements.  Repurchase agreements are arrangements in which 
banks, broker/dealers, and other recognized financial institutions sell U.S. 
government securities or other securities to the Fund and agree at the time of 
sale to repurchase them at a mutually agreed upon time and price within one 
year from the date of acquisition.  To the extent that the original seller 
does not repurchase the securities from the Fund, the Fund could receive less 
than the repurchase price on any sale of such securities.

	Reverse Repurchase Agreements.  The Fund may borrow funds for temporary 
purposes by entering into reverse repurchase agreements in accordance with the 
investment restrictions described below. Pursuant to such agreements, the Fund 
would sell portfolio securities to financial institutions and agree to 
repurchase them at an agreed upon date and price. The Fund would consider 
entering into reverse repurchase agreements to avoid otherwise selling 
securities during unfavorable market conditions. Reverse repurchase agreements 
involve the risk that the market value of the portfolio securities sold by the 
Fund may decline below the price of the securities the Fund is obligated to 
repurchase. 

	Dollar Roll Transactions.  In order to enhance portfolio returns and 
manage prepayment risks, the Fund may engage in dollar roll transactions with 
respect to mortgage securities issued by GNMA, FNMA and FHLMC.  In a dollar 
roll transaction, the Fund sells a mortgage security to a financial 
institution, such as a bank or broker/dealer, and simultaneously agrees to 
repurchase a substantially similar (same type, coupon, and maturity) security 
from the institution at a later date at an agreed upon price.  The mortgage 
securities that are repurchased will bear the same interest rate as those 
sold, but generally will be collateralized by different pools of mortgages 
with different prepayment histories.  During the period between the sale and 
repurchase, the Fund will not be entitled to receive interest and principal 
payments on the securities sold.  Proceeds of the sale will be invested in 
short-term instruments, and the income from these investments, together with 
any additional fee income received on the sale, will generate income for the 
Fund exceeding the yield.  When the Fund enters into a dollar roll 
transaction, liquid assets of the Fund, in a dollar amount sufficient to make 
payment for the obligations to be repurchased, are segregated at the trade 
date.  These assets are marked to market daily and are maintained until the 
transaction is settled.

	Hedging Transactions.  To assist in reducing fluctuations in net asset 
value, the Fund may from time to time engage in certain hedging transactions 
involving exchange traded options or futures and the short sale of these 
securities and other acceptable investments of the Fund to the extent that 
such transactions are in conformity with applicable laws, rules and 
regulations.  Although the use of hedging strategies is intended to reduce the 
Fund's exposure to interest rate volatility, it may cause some fluctuation in 
net asset value.
   
	Illiquid Securities.  The Fund will not knowingly invest more than 15% 
of the value of its total net assets in illiquid securities, including time 
deposits and repurchase agreements having maturities longer than seven days.  
Securities that have readily available market quotations are not deemed 
illiquid for purposes of this limitation (irrespective of any legal or 
contractual restrictions on resale).  The Fund may invest in commercial 
obligations issued in reliance on the so-called "private placement" exemption 
from registration afforded by Section 4(2) of the Securities Act of 1933, as 
amended ("Section 4(2) paper").  The Fund may also purchase securities that 
are not registered under the Securities Act of 1933, as amended, but which can 
be sold to qualified institutional buyers in accordance with Rule 144A under 
that Act ("Rule 144A securities").  Section 4(2) paper is restricted as to 
disposition under the federal securities laws, and generally is sold to 
institutional investors such as the Fund who agree that they are purchasing 
the paper for investment and not with a view to public distribution.  Any 
resale by the purchaser must be in an exempt transaction.  Section 4(2) paper 
normally is resold to other institutional investors like the Fund through or 
with the assistance of the issuer or investment dealers who make a market in 
the Section 4(2) paper, thus providing liquidity.  Rule 144A securities 
generally must be sold to other qualified institutional buyers.  If a 
particular investment in Section 4(2) paper or Rule 144A securities is not 
determined to be liquid, that investment will be included within the 15% 
limitation on investment in illiquid securities.  The ability to sell Rule 
144A securities to qualified institutional buyers is a recent development and 
it is not possible to predict how this market will mature. 
    
	When-Issued Securities.  The Fund may also purchase securities on a 
"when-issued" basis.  When-issued securities are securities purchased for 
delivery beyond the normal settlement date at a stated price and yield.  The 
Fund will generally not pay for such securities or start earning interest on 
them until they are received.  Securities purchased on a when-issued basis are 
recorded as an asset and are subject to changes in value based upon changes in 
the general level of interest rates.  The Fund expects that commitments to 
purchase when-issued securities will not exceed 25% of the value of its total 
assets absent unusual market conditions.  The Fund does not intend to purchase 
when-issued securities for speculative purposes but only in furtherance of its 
investment objective. 

	Lending of Portfolio Securities.  In order to generate additional 
income, the Fund may lend portfolio securities up to one-third of the value of 
its total assets to broker/dealers, banks, or other institutional borrowers of 
securities.  The Fund will only enter into loan arrangements with 
broker/dealers, banks, or other institutions which the Investment Adviser has 
determined are creditworthy under guidelines established by the Fund's Board 
of Trustees and will receive collateral in the form of cash or U.S. government 
securities equal to at least 100% of the value of the securities loaned.

   
	Temporary Defensive Positions.  When maintaining a temporary defensive 
position, the Fund may invest its assets, without limit, in any fixed rate 
U.S. government securities and repurchase agreements, commercial paper and 
other short-term corporate obligations.  The Fund's investment in commercial 
paper or corporate obligations will be limited to securities with one year or 
less remaining to maturity and rated A-1 by S&P Corporation or P-1 by Moody's 
Investor Service, Inc.
    
	Portfolio Turnover.  Although the Fund does not intend to invest for the 
purpose of seeking short-term profits, securities in its portfolio will be 
sold whenever the Fund's Investment Adviser believes it is appropriate to do 
so in light of the Fund's investment objective, without regard to the length 
of time a particular security may have been held.

Investment Limitations

	The Fund's investment objective and the policies described above are not 
fundamental and may be changed by the Trust's Board of Trustees without a vote 
of shareholders.  If there is a change in the investment objective, 
shareholders should consider whether the Fund remains an appropriate 
investment in light of their then current financial position and needs.  The 
Fund's investment limitations summarized below may not be changed without the 
affirmative vote of the holders of a majority of its outstanding shares.  
There can be no assurance that the Fund will achieve its investment objective.  
(A complete list of the investment limitations that cannot be changed without 
a vote of shareholders is contained in the Statement of Additional Information 
under "Investment Objective and Policies.") 

The Fund may not:

	1.	Borrow money, except that the Fund may (i) borrow money for 
temporary or emergency purposes (not for leveraging or investment) and (ii) 
engage in reverse repurchase agreements or dollar roll transactions for any 
purpose; provided that (i) and (ii) in combination do not exceed one-third of 
the value of the Fund's total assets (including the amount borrowed) less 
liabilities (other than borrowings).

	2.	Purchase any securities which would cause 25% or more of the value 
of its total assets at the time of purchase to be invested in the securities 
of issuers conducting their principal business activities in the same 
industry, provided that there is no limitation with respect to investments in 
U.S. government obligations and obligations of domestic banks. 

PURCHASE AND REDEMPTION OF SHARES

Purchase Procedures

	Purchases of Fund shares must be made through a brokerage account 
maintained through Lehman Brothers Inc. ("Lehman Brothers") or a broker that 
clears securities transactions through Lehman Brothers on a fully disclosed 
basis (an "Introducing Broker").  The Fund reserves the right to reject any 
purchase order and to suspend the offering of shares for a period of time.

	The minimum initial investment in the Fund is $5,000 and the minimum 
subsequent investment is $1,000, except for purchases through (a) Individual 
Retirement Accounts ("IRAs") and Self-Employed Retirement Plans, for which the 
minimum initial and subsequent investments are $1,000 and $500, respectively, 
and (b) retirement plans qualified under Section 403(b)(7) of the Internal 
Revenue Code of 1986, as amended (the "Code"), for which the minimum and 
subsequent investment is $500.  There are no minimum investment requirements 
for employees of Lehman Brothers.  The Fund reserves the right at any time to 
vary the initial and subsequent investment minimums.  No certificates are 
issued for Fund shares.

	The Fund's shares are sold continuously at their net asset value next 
determined after a purchase order is received by Lehman Brothers or an 
Introducing Broker.  Payment for Fund shares is generally due to Lehman 
Brothers or an Introducing Broker on the fifth business day after the trade 
date.  Purchase orders received by Lehman Brothers or an Introducing Broker 
prior to the close of regular trading on the NYSE, currently 4:00 p.m., 
Eastern time, on any day that the Fund calculates its net asset value, are 
priced according to the net asset value determined on that day.  Purchase 
orders received after the close of regular trading on the NYSE are priced as 
of the time the net asset value per share is next determined.  Shares 
purchased begin to accrue income dividends on the next business day following 
the day that the purchase order is settled.

Valuation of Shares 

	The Fund's net asset value per share for purposes of pricing purchase 
and redemption orders is determined by the Fund's Administrator as of 4:00 
p.m., Eastern time, on each weekday, with the exception of those holidays on 
which either the New York Stock Exchange or the Federal Reserve Bank of Boston 
is closed.  Currently, one or both of these institutions are closed on the 
customary national business holidays of New Year's Day, Martin Luther King, 
Jr. Day, Presidents' Day, Good Friday, Memorial Day (observed), Independence 
Day (observed), Labor Day, Columbus Day, Veterans Day, Thanksgiving Day and 
Christmas Day.  The net asset value per share of Fund shares is calculated by 
adding the value of all securities and other assets of the Fund, subtracting 
liabilities, and dividing the result by the total number of the Fund's 
outstanding shares (irrespective of class or sub-class).  The Fund's net asset 
value per share for purposes of pricing purchase and redemption orders is 
determined independently of the net asset value of the Trust's other 
investment portfolios. 

Redemption Procedures

	Shareholders may redeem their shares without charge on any day the Fund 
calculates its net asset value.  See "Valuation of Shares."  Redemption 
requests received in proper form prior to the close of regular trading on the 
NYSE are priced at the net asset value per share determined on that day.  
Redemption requests received after the close of regular trading on the NYSE 
are priced at the net asset value as next determined.  The Fund normally 
transmits redemption proceeds for credit to the shareholder's account at 
Lehman Brothers or the Introducing Broker on the fifth business day following 
receipt of a redemption request.  Generally, these funds will not be invested 
for the shareholder's benefit without specific instruction, and Lehman 
Brothers or the Introducing Broker will benefit from the use of temporarily 
uninvested funds.  A shareholder who pays for Fund shares by personal check 
will be credited with the proceeds of a redemption of those shares only after 
the purchase check has been collected, which may take up to 15 days or more.  
A shareholder who anticipates the need for more immediate access to his or her 
investment should purchase shares with federal funds by bank wire or with a 
certified or cashier's check.

	A Fund account that is reduced by a shareholder to a value of $1,000 or 
less ($500 for IRAs and Self-Employed Retirement Plans) may be subject to 
redemption by that Fund, but only after the shareholder has been given at 
least 60 days in which to increase the account balance to more than $1,000 
($500 for IRAs and Self-Employed Retirement Plans).  In addition, the Fund may 
redeem shares involuntarily or suspend the right of redemption as permitted 
under the 1940 Act, as described in the Statement of Additional Information 
under "Additional Purchase and Redemption Information."

Fund shares may be redeemed in one of the following ways:

Redemption Through Lehman Brothers

	Redemption requests may be made through Lehman Brothers or an 
Introducing Broker.

Redemption By Mail

	Shares may be redeemed by submitting a written request for redemption 
to:

	Lehman Brothers Funds
	c/o The Shareholder Services Group, Inc.
	P.O. Box 9134
	Boston, Massachusetts  02205-9134

	A written redemption request to the Fund's Transfer Agent  must (a) 
state the number of shares to be redeemed, (b) indicate the name of the Fund 
from which such shares are to be redeemed, (C) identify the shareholder's 
account number and (d) be signed by each registered owner exactly as the 
shares are registered.  Any signature appearing on a redemption request must 
be guaranteed by a domestic bank, a savings and loan institution, a domestic 
credit union, a member bank of the Federal Reserve System or a member firm of 
a national securities exchange.  The Fund's Transfer Agent may require 
additional supporting documents for redemptions made by corporations, 
executors, administrators, trustees and guardians.  A redemption request will 
not be deemed to be properly received until the Fund's Transfer Agent receives 
all required documents in proper form.  The Shareholder Services Group, Inc., 
a subsidiary of First Data Corporation, is located at One Exchange Place, 
Boston, Massachusetts 02109 and serves as the Fund's Transfer Agent.

Exchange Privilege
   
	Shares of the Fund may be exchanged without charge for shares of the 
Lehman Brothers Short Duration U.S. Government Fund - Premier Shares, the 
Lehman Brothers Daily Income Fund and the Lehman Brothers Municipal Income 
Fund.  Before engaging in an exchange transaction, a shareholder should read 
carefully the portions of the Prospectus describing the Fund into which the 
exchange will occur.  An exchange is treated as a sale of a security for tax 
purposes on which a gain or loss may be recognized.
    
DIVIDENDS

	The Fund declares dividends from its net investment income on each day 
the Fund is open for business and pays dividends monthly.  Distributions of 
net realized long-term capital gains, if any, are declared and paid annually.  
Unless a shareholder instructs the Fund to pay dividends or capital gains 
distributions in cash and credit them to the shareholder's account at Lehman 
Brothers, dividends and distributions from the Fund will be reinvested 
automatically in additional shares of the Fund at net asset value.  Shares 
redeemed during the month are entitled to dividends and distributions declared 
up to and including the date of redemption.



TAXES

	The Fund intends to qualify each year as a "regulated investment 
company" under the Internal Revenue Code of 1986, as amended (the "Code").  A 
regulated investment company is exempt from Federal income tax on amounts 
distributed to its shareholders. 

	For Federal income tax purposes, dividends of net ordinary income and 
distributions of any net realized short-term capital gain, whether paid in 
cash or reinvested in shares of the Fund, are taxable to shareholders as 
ordinary income.  Distributions of net realized long-term capital gains, 
whether paid in cash or reinvested in shares of the Fund, are taxable to 
shareholders as long-term capital gains, irrespective of the length of time 
the shareholder had held his Fund shares.  (Federal income taxes for 
distributions to an IRA or a qualified retirement plan are deferred under the 
Code.)  It is anticipated that none of the Fund's distributions will be 
eligible for the dividends received deduction for corporations.

	Dividends declared in October, November or December of any year payable 
to shareholders of record on a specified date in such months will be deemed to 
have been received by the shareholders and paid by the Fund on December 31 of 
such year in the event such dividends are actually paid during January of the 
following year.

	Shareholders will be advised at least annually as to the Federal income 
tax status of distributions made to them each year.

MANAGEMENT OF THE FUND

	The business and affairs of the Fund are managed under the direction of 
the Trust's Board of Trustees.  The Trustees approve all significant 
agreements between the Trust and the persons or companies that furnish 
services to the Fund, including agreements with its Distributors, Investment 
Adviser, Administrator, Custodian and Transfer Agent.  The day-to-day 
operations of the Fund are delegated to the Fund's Investment Adviser and 
Administrator.  One Trustee and all of the Trust's officers are affiliated 
with Lehman Brothers, The Boston Company Advisors, Inc. or one of their 
affiliates.  The Statement of Additional Information relating to the Fund 
contains general background information regarding each Trustee and executive 
officer of the Trust. 

Investment Adviser-Lehman Brothers Global Asset Management Inc.
   
	Lehman Brothers Global Asset Management Inc. ("LBGAM"), located at 3 
World Financial Center, New York, New York 10285, serves as the Fund's 
Investment Adviser.  LBGAM is a wholly owned subsidiary of Lehman Brothers 
Holdings Inc. ("Holdings").  All of the issued and outstanding common stock 
(representing 92% of the voting stock) of Holdings is held by American Express 
Company.  LBGAM, together with other Lehman Brothers investment advisory 
affiliates, serves as investment adviser to investment companies and private 
accounts and has assets under management in excess of $17 billion. 
    
   
	As Investment Adviser to the Fund, LBGAM manages the Fund's portfolio in 
accordance with its investment objective and policies, makes investment 
decisions for the Fund, places orders to purchase and sell securities and 
employs professional portfolio managers and securities analysts who provide 
research services to the Fund.  For its services LBGAM is entitled to a 
monthly fee by the Fund at the annual rate of .30% of the value of the Fund's 
average daily net assets.
    
	Kirk D. Hartman, a Managing Director of LBGAM, has been associated with 
Lehman Brothers in the Mortgage Department since 1987.  Mr. Hartman is the 
portfolio manager primarily responsible for managing the day-to-day operations 
of the Fund, including the making of investment selections.  Mr. Hartman will 
be assisted by Andrew J. Stenwall, a Vice President of LBGAM.  Mr. Hartman 
will manage the Fund as of commencement of operations.

Administrator-The Boston Company Advisors, Inc.
   
	The Boston Company Advisors, Inc. ("Boston Advisors"), located at One 
Exchange Place, Boston, Massachusetts 02109, serves as the Fund's 
Administrator.  Boston Advisors is a wholly owned subsidiary of The Boston 
Company, Inc., which is in turn a wholly owned subsidiary of Boston Group 
Holdings, Inc. ("BGH").  BGH is a wholly owned subsidiary of Mellon Bank 
Corporation.  As Administrator, Boston Advisors calculates the net asset value 
of the Fund's shares and generally assists in all aspects of the Fund's 
administration and operation.  As compensation for its services as 
Administrator, Boston Advisors is entitled to a monthly fee at the annual rate 
of .10% of the value of the Fund's average daily net assets. 
    
Distributors

	Lehman Brothers, located at 3 World Financial Center, New York, New York 
10285, is a Distributor of the Fund.  Lehman Brothers, a wholly owned 
subsidiary of Holdings, is one of the leading full-line investment firms 
serving the U.S. and foreign securities and commodities markets.  American 
Express Company and its subsidiaries, other than Lehman Brothers, are 
principally engaged in the businesses of providing travel-related services, 
investment services, information services, international banking services and 
investors' diversified financial services.  Funds Distributor Inc., a wholly 
owned subsidiary of Lehman Brothers located at One Exchange Place, Boston, 
Massachusetts 02109, also serves as a distributor of the Fund.  

Shareholder Services
   
	Under a Plan of Distribution adopted pursuant to Rule 12b-1 under the 
1940 Act, Premier Shares bear fees ("Rule 12b-1 fees") payable by the Fund at 
the aggregate rate of up to .50% (on an annualized basis) of the average daily 
net asset value of such shares to Lehman Brothers to support the costs of 
distributing Premier Shares and for services it provides to the beneficial 
owners of Premier Shares.  The Plan of Distribution also allows Lehman 
Brothers to use its own resources to provide distribution services and 
shareholder services.  The latter services include providing information 
periodically to shareholders concerning their investment in Premier Shares; 
responding to inquiries from shareholders concerning the Fund and their 
investment in Premier Shares; assisting in effecting purchase and redemption 
transactions; and providing such other similar services as may be reasonably 
requested by shareholders or the Fund.  Premier Shares are identical in all 
respects to shares of other classes except that they bear the fees described 
above and enjoy certain exclusive voting rights on matters relating to these 
fees.
    
Expenses
   
	The Fund bears all its own expenses.  The Fund's expenses include taxes, 
interest, fees and salaries of the Trust's trustees and officers who are not 
directors, officers or employees of the Fund's service contractors, Securities 
and Exchange Commission fees, state securities qualification fees, costs of 
preparing and printing prospectuses for regulatory purposes and for 
distribution to shareholders, advisory and administration fees, charges of the 
custodian, transfer agent and dividend disbursing agent, certain insurance 
premiums, outside auditing and legal expenses, costs of shareholder reports 
and shareholder meetings and any extraordinary expenses.  The Fund also pays 
for brokerage fees and commissions (if any) in connection with the purchase 
and sale of portfolio securities.  In order to maintain a competitive expense 
ratio, LBGAM has agreed voluntarily to waive its fee or to reimburse the Fund 
if and to the extent that the Fund's total operating expenses exceed .90% of 
average daily net assets.  This voluntary waiver and reimbursement will not be 
changed unless shareholders are provided at least 60 days' advance notice.  In 
addition, the Investment Adviser has agreed to reimburse the Fund to the 
extent required by applicable state law for certain expenses that are 
described in the Statement of Additional Information relating to the Fund.  
Any fees charged by institutional investors to their customers in connection 
with investments in Fund Shares are not reflected in the Fund's expenses.
    
PERFORMANCE INFORMATION
   
	From time to time, in advertisements or in reports to shareholders, the 
"total return," "yields" and "effective yields" for shares may be quoted.  
Total return and yield quotations are computed separately for each class of 
shares.  "Total return" for a particular class of shares represents the 
change, over a specified period of time, in the value of an investment in the 
shares after reinvesting all income and capital gain distributions.  It is 
calculated by dividing that change by the initial investment and is expressed 
as a percentage.  The "yield" quoted in advertisements for a particular class 
of shares refers to the income generated by an investment in such shares over 
a specified period (such as a 30-day period) identified in the advertisement.  
This income is then "annualized;" that is, the amount of income generated by 
the investment during that period is assumed to be generated each such period 
over a 52-week or one-year period and is shown as a percentage of the 
investment.  The "effective yield" is calculated similarly but, when 
annualized, the income earned by an investment in a particular class is 
assumed to be reinvested.  The "effective yield" will be slightly higher than 
the "yield" because of the compounding effect of this assumed reinvestment. 
    

   
	Distribution rates may also be quoted for the Fund.  Quotations of 
distribution rates are calculated by annualizing the most recent distribution 
of net investment income for a monthly, quarterly or other relevant period and 
dividing this amount by the ending net asset value for the period for which 
the distribution rates are being calculated.
    

   
	The Fund's performance may be compared to that of other mutual funds 
with similar objectives, to stock or other relevant indices, or to rankings 
prepared by independent services or other financial or industry publications 
that monitor the performance of mutual funds.  For example, such data are 
reported in national financial publications such as Morningstar, Inc., 
Barron's, IBC/Donoghue's Inc. Bond Fund Report, The Wall Street Journal and 
The New York Times, reports prepared by Lipper Analytical Services, Inc. and 
publications of a local or regional nature.  The Fund's Lipper ranking in the 
"U.S. Mortgage Fund" or "ARM Fund" categories may also be quoted from time to 
time in advertising and sales literature.
    
	The Fund's total return and yield figures for a class of shares 
represent past performance, will fluctuate and should not be considered as 
representative of future results.  The performance of any investment is 
generally a function of portfolio quality and maturity, type of investment and 
operating expenses.  The methods used to compute the Fund's total return and 
yields are described in more detail in the Statement of Additional 
Information.  Current performance information maybe obtained through a Lehman 
Brothers Investment Representative.

DESCRIPTION OF SHARES

	The Trust is a Massachusetts business trust established on November 25, 
1992.  The Trust's Declaration of Trust authorizes the Board of Trustees to 
issue an unlimited number of full and fractional shares of beneficial interest 
in the Trust and to classify or reclassify any unissued shares into one or 
more additional classes of shares.  The Declaration of Trust further 
authorizes the Trustees to classify or reclassify any class of shares into one 
or more sub-classes.  The issuance of separate classes of shares is intended 
to address the different service needs of different types of investors.  Each 
share represents interests in each Fund in proportion to each share's net 
asset value, except that shares of certain classes bear fees and expenses for 
certain shareholder services or distribution and support services provided to 
that class.

	As a Massachusetts business trust, the Trust is not required to hold 
annual meetings of shareholders.  However, the Trust will call a meeting of 
shareholders where required by law for purposes such as voting upon the 
question of removal of a member of the Board of Trustees upon written request 
of shareholders owning at least 10% of the outstanding shares of the Trust 
entitled to vote.  Shareholders of the Trust are entitled to one vote for each 
full share held (irrespective of class or portfolio) and fractional votes for 
fractional shares held.

   
	In addition to Premier Shares, the Fund currently offers Institutional 
Shares and Select Shares.  Institutional Shares are sold to institutions that 
have not entered into servicing or other agreements with the Fund in 
connection with their investments and pay no Rule 12b-1 distribution or 
shareholder service fee.  Select Shares of the Fund are sold under a Plan of 
Distribution adopted pursuant to Rule 12b-1 to institutional investors and 
bear fees payable at a rate not exceeding .35% (on an annualized basis) of the 
average daily net asset value of the shares beneficially owned by such 
investors in return for certain administrative and shareholder services 
provided by Lehman Brothers or the institutional investors.  These services 
may include processing purchase, exchange and redemption requests from 
shareholders and placing orders with the Transfer Agent; processing dividend 
and distribution payments from the Funds on behalf of shareholders; providing 
information periodically to shareholders showing their positions in shares; 
responding to inquiries from shareholders concerning their investment in 
shares; arranging for bank wires; and providing such other similar services as 
may be reasonably requested.  Select Shares will bear all fees paid for 
services provided to that class under the Plan of Distribution.
    


No person has been authorized to give any information or to make any 
representations not contained in this Prospectus, or in the Fund's Statement 
of Additional Information incorporated herein by reference, in connection with 
the offering made by this Prospectus and, if given or made, such information 
or representations must not be relied upon as having been authorized by the 
Trust or its distributors. This Prospectus does not constitute an offering by 
the Trust or by the distributors in any jurisdiction in which such offering 
may not lawfully be made.

_________



TABLE OF CONTENTS

[CAPTION]
									

Page

	Background and Expense Information
2

	Investment Objective and Policies
3

	Purchase and Redemption of Shares
8

	Dividends
10

	Taxes
11

	Management of the Fund
11

	Performance Information
13

   Description of Shares
13






   
Lehman Brothers
Floating Rate U.S. Government Fund
    
__________

PROSPECTUS

   
February 21, 1994
    
__________

           
LEHMAN BROTHERS

	THIS PROSPECTUS AND THE STATEMENT OF ADDITIONAL INFORMATION INCORPORATED 
HEREIN RELATE PRIMARILY TO THE FUND AND DESCRIBE ONLY THE INVESTMENT OBJECTIVE 
AND POLICIES, OPERATIONS, CONTRACTS AND OTHER MATTERS RELATING TO THE FUND.  
INVESTORS WISHING TO OBTAIN SIMILAR INFORMATION REGARDING THE TRUST'S OTHER 
PORTFOLIOS MAY OBTAIN SEPARATE PROSPECTUSES DESCRIBING THEM BY CONTACTING 
LEHMAN BROTHERS AT 1-800-368-5556. 


Lehman Brothers Institutional Funds Group Trust
Short Duration U.S. Government Fund




Statement of Additional Information

   
February 21, 1994
    
   
	This Statement of Additional Information is meant to be read in 
conjunction with the Prospectuses for the Short Duration U.S. 
Government Fund, each dated February 21, 1994, as amended or 
supplemented from time to time (the "Prospectuses"), and is 
incorporated by reference in its entirety into the Prospectuses. 
Because this Statement of Additional Information is not itself a 
prospectus, no investment in shares of the Short Duration U.S. 
Government Fund should be made solely upon the information contained 
herein. Copies of the Prospectuses for the Short Duration U.S. 
Government Fund may be obtained by calling Lehman Brothers Inc. 
("Lehman Brothers") at 1-800-368-5556. Capitalized terms used but not 
defined herein have the same meanings as in the Prospectuses.
    
TABLE OF CONTENTS 


Page

The Trust	
2

Investment Objective and Policies	
2

Additional Purchase and Redemption 
Information	
11

Management of the Fund	
12

Additional Information Concerning Taxes	
17

Dividends	
18

Additional Performance Information	
18

Additional Description Concerning Shares	
19

Counsel	
20

Auditors	
20

Miscellaneous	
20

Appendix	
A-1




THE TRUST
   
Lehman Brothers Institutional Funds Group Trust (the "Trust") is a 
no-load, open-end management investment company. The Trust is a 
diversified investment portfolio and currently includes 12 separate 
portfolios, one of which is the Short Duration U.S. Government Fund 
(the "Fund").  The Fund currently offers three classes of shares.  
Each class represents an equal, pro rata interest in the Fund.  Each 
share accrues daily dividends in the same manner, except that Select 
Shares bear fees payable by the Fund to Lehman Brothers or 
institutional investors for services they provide to the beneficial 
owners of such shares and Premier Shares bear fees payable by the 
Fund to Lehman Brothers for services it provides to the beneficial 
owners of such shares. 
    
	THIS STATEMENT OF ADDITIONAL INFORMATION AND THE FUND'S 
PROSPECTUSES RELATE PRIMARILY TO THE FUND AND DESCRIBE ONLY THE 
INVESTMENT OBJECTIVE AND POLICIES, OPERATIONS, CONTRACTS AND OTHER 
MATTERS RELATING TO THE FUND.  INVESTORS WISHING TO OBTAIN SIMILAR 
INFORMATION REGARDING THE TRUST'S OTHER PORTFOLIOS MAY OBTAIN 
INFORMATION DESCRIBING THEM BY CONTACTING LEHMAN BROTHERS AT 
800-368-5556.

INVESTMENT OBJECTIVE AND POLICIES 

As stated in the Fund's Prospectuses, the investment objective of the 
Fund is to provide a high level of current income consistent with 
minimal fluctuation of net asset value.  The Fund invests primarily 
in a portfolio consisting of short duration adjustable rate, floating 
rate and fixed rate U.S. government and agency securities, and 
repurchase agreements collateralized by such obligations.  The 
following policies supplement the description of the Fund's 
investment objective and policies as contained in the Prospectuses.

Types of Investments

	The Fund pursues its investment objective by investing at least 
65% of its assets in a professionally managed portfolio of U.S. 
government and agency securities.  These securities will be short 
duration adjustable rate, floating rate and fixed rate securities 
which are issued or guaranteed as to payment of principal and 
interest by the U.S. government, its agencies or instrumentalities.  
The Fund may also invest up to 10% of its total assets in U.S. 
government stripped mortgage-backed securities.  Mortgage-backed 
securities and other U.S. government or agency obligations are backed 
by either:

*	the full faith and credit of the U.S. Treasury;

*	the issuer's right to borrow from the U.S. Treasury;

*	the discretionary authority of the U.S. government to purchase 
certain obligations of agencies or instrumentalities; or

*	the credit of the agency or instrumentality issuing the 
obligations.


	Examples of agencies and instrumentalities which may not always 
receive financial support from the U.S. government are:

*	Federal Farm Credit Banks;

*	Federal Home Loan Banks;

*	Federal National Mortgage Association;

*	Student Loan Marketing Association; and

*	Federal Home Loan Mortgage Corporation.

Mortgage Loans and Mortgage-Backed Securities

	Indices Applicable to Adjustable Rate Mortgage Loans ("ARMS").  
Commonly used indices applicable to ARMS comprising a mortgage pool 
include the Six Month Treasury Index, the One Year Treasury Index, 
the Three Year Treasury Index and the 11th District Cost of Funds 
Index.

	The One Year Treasury Index is calculated by fitting a yield 
curve to the median closing bid yield on actively traded U.S. 
Treasury securities in the over-the- counter market, as reported by 
the five leading government securities dealers to the Federal Reserve 
Bank of New York.  The Yield is for a "constant maturity" and is 
estimated from the Treasury's daily yield curve.  The Index is then 
computed as a weekly average of the daily fitted values.

	The Eleventh District Index is normally published by the Federal 
Home Loan Bank ("FHLB") is San Francisco on the last day on which the 
FHLB of San Francisco is open for business in each month.  When the 
Eleventh District Index is announced by the last working day of the 
month, it indicated the monthly weighted average cost of funds for 
savings institutions in the Eleventh District of the FHLB System (the 
"Eleventh District," which consists of California, Nevada and 
Arizona) for the month preceding the month in which the Eleventh 
District Index is published.  The Eleventh District Index for a 
particular month reflects the interest costs paid on all types of 
funds held by Eleventh District member institutions and is calculated 
by dividing the cost of funds by the average of the total amount of 
those funds outstanding at the end of the month and the prior month, 
and annualizing the adjusting the result to reflect the actual number 
of days in the particular month.  If necessary, before these 
calculations are made, the component figures are adjusted by the FHLB 
of San Francisco to neutralize the effect of events such as member 
institutions leaving the Eleventh District or acquiring institutions 
outside the Eleventh District.

	Adjustable Rate Mortgage-Backed Securities Market.	  The 
market for U.S. government agency adjustable rate mortgage-backed 
securities has developed rapidly in recent years, with over $110 
billion in such securities now issued.  ARMS have accounted for a 
major portion of mortgage or organizations since federally chartered 
thrifts were permitted to originate them in 1981.  The growth of the 
market for U.S. government agency adjustable rate mortgage-backed 
securities is the result of this increasing popularity of ARMS, new 
investment products and research.


	Legal Considerations of Mortgage Loans.  The following is a 
discussion of certain legal regulatory aspects of all mortgage loans 
including the adjustable and fixed rate mortgage loans expected to 
underlie the Mortgage-Backed Securities in which the Fund will 
invest.  These regulations may impair the ability of a mortgage 
lender to enforce its rights under the mortgage documents.  Even 
though the Fund will invest in Mortgage-Backed Securities issued or 
guaranteed by the U.S. Government, its agencies or instrumentalities, 
these regulations may adversely affect the Fund's investments by 
delaying the Fund's receipt of payments derived form principal or 
interest on mortgage loans affected by such regulations.

	1.	Foreclosure.  A foreclosure of a defaulted mortgage loan 
may be delayed due to compliance with statutory notice or service of 
process provisions, difficulties in locating necessary parties or 
legal challenges to the mortgagee's right to foreclose.  Depending 
upon market conditions, the ultimate proceeds of the sale of 
foreclosed property may not equal the amounts owed on the Mortgage-
Backed Securities.

		Further, courts in some cases have imposed general 
equitable principles upon foreclosure generally designed to relieve 
the borrower form the legal effect of default and have required 
lenders to undertake affirmative and expensive actions to determine 
the causes for the default and the likelihood of loan reinstatement.

	2.	Rights of Redemption.  In some states, after foreclosure 
of a mortgage loan, the borrower and foreclosed junior lienors are 
given a statutory period in which to redeem the property, which right 
may diminish the mortgagee's ability to sell the property

	3.	Legislative Limitations.   In addition to anti-deficiency 
and related legislation, numerous other federal and state statutory 
provisions, including the federal bankruptcy laws and state laws 
affording relief to debtors, may interfere with or affect the ability 
of a secured mortgage lender to enforce its security interest.  For 
example, in a Chapter 13 proceeding under the federal Bankruptcy 
Code, when a court determines that the value of a home that is not 
the principal residence is less than the principal balance of the 
loan, the court may prevent a lender from foreclosing on the home, 
and, as part of the repayment plan, reduce the amount of the secured 
indebtedness to the value of the home as it exists at the time of the 
proceeding, leaving the lender as a general unsecured creditor for 
the difference between that value and the amount of outstanding 
indebtedness.  Certain court decisions have applied such relief to 
claims secured by the debtor's principal residence.  A bankruptcy 
court may grant court also may reduce the monthly payments due under 
such mortgage loan, change the rate of interest, reduce the principal 
balance of the loan to than-current appraised value of the related 
mortgaged property and alter the borrower's obligation to repay 
amount otherwise due on a mortgage loan, the mortgage loan servicer 
will not be required to advance such amounts, and any loss in respect 
thereof will be borne by the holders of securities backed by such 
loans.  In addition, numerous federal and state consumer protection 
laws impose penalties for failure to comply with specific 
requirements in connection with origination and servicing of mortgage 
loans.  Further, the Bankruptcy Code provides priority to certain tax 
liens over the lien of a mortgage loan.

	4.	"Due-on "Sale" Provisions.  Fixed-rate mortgage loans may 
contain a so-called "due-on-sale" clause permitting acceleration of 
the maturity of the mortgage loan if the borrower transfers the 
property.  The Garn-St. Germain Depository Institutions Act of 1982 
sets forth nine specific instances in which no mortgage lender 
covered by that Act may exercise a "due-on sale" clause or the lack 
of such a clause on mortgage loan documents may result in a mortgage 
loan being assumed by a purchaser of the property that bears an 
interest rate below the current market rate.

	5.	Usury Laws.  Some states prohibit charging interest on 
mortgage loans in excess of statutory limits.  If such limits are 
exceeded, substantial penalties may be incurred and, in some cases, 
enforceability of the obligation to pay principal and interest may be 
affected.

	Interest Rate Swaps, Mortgage Swaps, Caps and Floors.  The Fund 
may enter into interest rate and mortgage swaps and interest rate 
caps and floors for hedging purposes and not for speculation.  A Fund 
will typically use interest rate and mortgage swaps to preserve a 
return on a particular investment or portion of its portfolio or to 
shorten effective duration of its portfolio or to shorten the 
effective duration of its portfolio securities.  Interest rate swaps 
involve the exchange by a Fund with another party of their respective 
commitments to pay or receive interest, such as an exchange of fixed 
rate payments for floating rate payments.  Mortgage swaps are 
similar, pool or pools of mortgages.  The purchase of an interest on 
a specified index falls below (floor) or exceeds (cap) a 
predetermined interest rate.

	The Fund will only enter into interest rate and mortgage swaps 
on a net basis, i.e., the two payment streams are netted out, with 
the Fund receiving or paying, as the case may be, only the net amount 
of the two payments.  In as much as these transactions are entered 
into for good faith hedging purposes, the Fund and the Investment 
Adviser believe that such obligations do not constitute senior 
securities as defined in the Investment Company Act of 1940 (the 
"1940 Act") and, accordingly, will not treat them as being subject to 
the Fund's borrowing restrictions.  The net amount of the excess, if 
any, of the Fund's obligations over its entitlements with respect to 
each interest rated or mortgage swap will be accrued on a daily basis 
and an amount of cash or liquid securities rate in one of the top 
three ratings categories by Moody's Investors Service, Inc. 
("Moody's") or Standard & Poor's Corporation ("S&P"), or if unrated, 
deemed by the Investment Adviser to be of comparable quality ("High 
Grade Debt Securities") having an aggregate net asset value at least 
equal to such accrued excess will be maintained in a segregated 
account by the Fund's custodian.
   
	The Fund will not enter into any interest rate or mortgage swap 
or interest rate cap or floor transaction unless the unsecured 
commercial paper, senior debt or the claims-paying ability of the 
other party thereto is rated either AA or A-1 or Aa or P-1 or better 
by either of S&P or Moody's.  If there is a default by the other 
party to such a transaction, the Fund will have contractual remedies 
pursuant to the agreements related to the transaction.  The swap 
market has grown substantially in recent years with a large number of 
banks and investment banking firms acting both as principals and as 
agents utilizing standardized swap documentation.  As a result, the 
swap market has become relatively liquid in comparison with the 
markets for other similar instruments which are traded in the 
interbank market.  The staff of the Securities and Exchange 
Commission (the "SEC") currently takes the position that swaps, caps 
and floors are illiquid for purposes of the Fund's 15% limitation on 
illiquid investments.
    
	Privately Issued Mortgage-Related Securities.  Privately issued 
mortgage-related securities generally represent an ownership interest 
in federal agency mortgage pass-through securities, such as those 
issued by Government National Mortgage Association.  The terms and 
characteristics of the mortgage instruments may vary among pass-
through mortgage loan pools.  The market for such mortgage related 
securities has expanded considerably since its inception.  The size 
of the primary issuance market and the active participation in the 
secondary market by securities dealers an other investors make 
government-related pools highly liquid.


Additional Information on Investment Practices

	U.S. Government Obligations.  Examples of the types of U.S. 
government obligations that may be held by the Fund include, in 
addition to U.S. Treasury bills, notes and bonds, the obligations of 
the Federal Housing Administration, Farmers Home Administration, 
Export-Import Bank of the United States, Small Business 
Administration, Government National Mortgage Association, Federal 
National Mortgage Association, Federal Financing Bank, General 
Services Administration, Student Loan Marketing Association, Central 
Bank for Cooperatives, Federal Home Loan Banks, Federal Home Loan 
Mortgage Corporation, Federal Intermediate Credit Banks, Federal Land 
Banks, Federal Farm Credit Banks, Maritime Administration, Resolution 
Trust Corporation, Tennessee Valley Authority, U.S. Postal Service 
and Washington D.C. Armory Board. 

	Repurchase Agreements.  The repurchase price under the 
repurchase agreements described in the Prospectuses with respect to 
the Fund generally equals the price paid by the Fund plus interest 
negotiated on the basis of current short-term rates (which may be 
more or less than the rate on the securities underlying the 
repurchase agreement). The collateral underlying each repurchase 
agreement entered into by the Fund will consist entirely of direct 
obligations of the U.S. Government and obligations issued or 
guaranteed by U.S. government agencies or instrumentalities. 
Securities subject to repurchase agreements will be held by the 
Trust's custodian, sub-custodian or in the Federal Reserve/Treasury 
book-entry system.

	Reverse Repurchase Agreements.  The Fund may also enter into 
reverse repurchase agreements.  These transactions are similar to 
borrowing cash.  In a reverse repurchase agreement a Fund transfers 
possession of a portfolio instrument to another person, such as a 
financial institution, broker, or dealer, in return for a percentage 
of the instrument's market value in cash, and agrees that on a 
stipulated date in the future the Fund will repurchase the portfolio 
instrument by remitting the original consideration plus interest at 
an agreed upon rate.  The use of reverse repurchase agreements may 
enable a Fund to avoid selling portfolio instruments at a time when a 
sale may be deemed to be disadvantageous, but the ability to enter 
into reverse repurchase agreements does not ensure that a Fund will 
be able to avoid selling portfolio instruments at a disadvantageous 
time.  When effecting reverse repurchase agreements, liquid assets of 
a Fund, in a dollar amount sufficient to make payment for the 
obligations to be purchased, are segregated at the trade date.  These 
assets are marked to market daily and are maintained until the 
transaction is settled.

	When-Issued Transactions.  As stated in the Fund's Prospectuses, 
the Fund may purchase securities on a "when-issued" or "delayed 
delivery" basis (i.e., for delivery beyond the normal settlement date 
at a stated price and yield). When a Fund agrees to purchase 
when-issued securities, the custodian will set aside cash or liquid 
portfolio securities equal to the amount of the commitment in a 
separate account. Normally, the custodian will set aside portfolio 
securities to satisfy a purchase commitment, and in such a case that 
Fund may be required subsequently to place additional assets in the 
separate account in order to ensure that the value of the account 
remains equal to the amount of such Fund's commitment. It may be 
expected that a Fund's net assets will fluctuate to a greater degree 
when it sets aside portfolio securities to cover such purchase 
commitments than when it sets aside cash. Because the Fund will set 
aside cash or liquid assets to satisfy its purchase commitments in 
the manner described, the Fund's liquidity and ability to manage its 
portfolio might be affected in the event its commitments to purchase 
when-issued securities exceed 25% of the value of its assets. When a 
Fund engages in when-issued transactions, it relies on the seller to 
consummate the trade. Failure of the seller to do so may result in 
such Fund's incurring a loss or missing an opportunity to obtain a 
price considered to be advantageous. The Fund does not intend to 
purchase when-issued securities for speculative purposes but only in 
furtherance of their investment objectives. The Fund reserves the 
right to sell the securities before the settlement date if it is 
deemed advisable. 

	Lending of Portfolio Securities.  The Fund has the ability to 
lend securities in an amount up to one-third of the value of their 
respective total assets from their respective portfolios to brokers, 
dealers and other financial organizations. The Fund may not lend its 
portfolio securities to Lehman Brothers or its affiliates without 
specific authorization from the SEC. Loans of portfolio securities by 
the Fund will be collateralized by cash, letters of credit or 
securities issued or guaranteed by the U.S. Government or its 
agencies which will be maintained at all times in an amount equal to 
at least 100% of the current market value of the loaned securities. 
From time to time, a Fund may return a part of the interest earned 
from the investment of collateral received for securities loaned to 
the borrower and/or a third party, which is unaffiliated with the 
Fund or with Lehman Brothers, and which is acting as a "finder." With 
respect to loans by a Fund of its portfolio securities, the Fund 
would continue to accrue interest on loaned securities and would also 
earn income on loans. Any cash collateral received by a Fund in 
connection with such loans would be invested in short-term U.S. 
government obligations. 

	Options Transactions.  The Fund is authorized to engage in 
transactions involving put and call options.  The Fund may purchase a 
put option, for example, in an effort to protect the value of a 
security that it owns against a substantial decline in market value, 
if the Adviser believes that a defensive posture is warranted for a 
portion of the Fund's portfolio.  In addition, in seeking to protect 
certain portfolio securities against a decline in market value at a 
time when put options on those particular securities are not 
available for purchase, a Fund may purchase a put option on 
securities it does not hold.  Although changes in the value of the 
put option should generally offset changes in the value of the 
securities being hedged, the correlation between the two values may 
not be as close in the latter type of transaction as in a transaction 
in which the Fund purchases a put option on an underlying security it 
owns.

	The Fund may purchase call options on securities they intend to 
acquire to hedge against an anticipated market appreciation in the 
price of the underlying securities.  If the market price does rise as 
anticipated in such a situation, the Fund will benefit from that rise 
only to the extent that the rise exceeds the premiums paid.  If the 
anticipated rise does not occur or if it does not exceed the premium, 
the Fund will bear the expense of the option premiums and transaction 
costs without gaining an offsetting benefit.  A Fund's ability to 
purchase put and call options may be limited by the tax and 
regulatory requirements which apply to a regulated investment 
company.

	Futures Contracts and Options on Futures Contracts.  The Fund 
may enter into interest rate futures contracts on U.S. government 
securities, mortgage securities and Eurodollar securities.  A futures 
contract on securities, other than GNMAs which are cash settled, is 
an agreement to purchase or sell an agreed amount of securities at a 
set price for delivery on an agreed future date.  A Fund may purchase 
a futures contract as a hedge against an anticipated decline in 
interest rates, and resulting increase in market price, of securities 
the Fund intends to acquire.  A Fund may sell a futures contract as a 
hedge against an anticipated increase in interest rates, and 
resulting decline in market price, of securities the Fund owns.

	The Fund may purchase call and put options on futures contracts 
on U.S. government securities, mortgage securities and Eurodollar 
securities that are traded on U.S. commodity exchanges.  An option on 
a futures contract gives the purchaser the right, in return for the 
premium paid, to assume a position in a futures contract (a long 
position if the option is a call and short position if the option is 
a put) at a specified exercise price at any time during the option 
put exercise period.  The writer of the option is required upon 
exercise to assume an offsetting futures position (a short position 
if the option is a call and a long position if the option is a put).  
Upon the exercise of the option, the assumption of offsetting futures 
positions by the writer and holder of the option will be accompanied 
by delivery of the accumulated cash balance in the writer's futures 
margin account that represents the amount by which the market price 
of the futures contract at exercise exceeds, in the case of a call, 
or is less than, in the case of a put, the exercise price of the 
option on the futures contract.

	The Fund's ability to enter into transactions in futures 
contracts and options on futures contracts may be limited by the tax 
requirements for qualification as a regulated investment company.  
The Fund will not purchase an option if, as a result of the purchase, 
more than 20% of its total assets would be invested in premiums for 
options and options on futures.  In addition, the Fund may not sell 
futures contracts or purchase related options if immediately after 
the sale the sum of the amount of initial margin deposits on the 
Fund's existing futures and options on futures and for premiums paid 
for the related options would exceed 5% of the market value of the 
Fund's total assets, after taking into account unrealized profits and 
unrealized losses on any such contracts the Fund has entered into, 
except that, in the case of an option that is in-the-money at the 
time of purchase, the in-the-money amount may be excluded in 
computing the 5% limitation.

	The Fund will purchase put options on futures contracts 
primarily to hedge their portfolios of U.S. government securities and 
mortgage securities against the risk of rising interest rates, and 
the consequential decline in the prices of U.S. government securities 
and mortgage securities it owns.  The Fund will purchase call options 
on futures contracts to hedge the Fund's portfolio against a possible 
market advance at a time when the Fund is not fully invested in U.S. 
government securities and mortgage securities (other than U.S. 
Treasury Bills).

	In addition, the Fund may from time to time purchase Eurodollar 
instruments traded on the Chicago Mercantile Exchange.  These 
instruments are in essence U.S. dollar-denominated futures contracts 
or options on futures contracts that are linked to LIBOR.  Eurodollar 
futures contracts enable purchasers to obtain a fixed rate for the 
lending of funds and sellers to obtain a fixed rate for borrowings.  
The Fund intends to use Eurodollar futures contracts and options on 
futures contracts for hedging purposes only.  The use of these 
instruments is subject to the same limitations and risks as those 
applicable to the use of the interest rate futures contracts and 
options on futures contracts.

	Short Sales.  The Fund may make short sales of securities.  A 
short sale is a transaction in which a Fund sells a security it does 
not own in anticipation that the market price of that security will 
decline.  The Fund expects to make short sales as a form of hedging 
to offset potential declines in securities positions it holds.

	To complete a short sale, a Fund must arrange through a broker 
to borrow the securities to be delivered to the buyer.  The proceeds 
received by the Fund from the short sale are retained by the broker 
until the Fund replaces the borrowed securities.  In borrowing the 
securities to be delivered to the buyer, the Fund becomes obligated 
to replace the securities borrowed at their market price at the time 
of replacement, whatever that price may be.  The Fund may have to pay 
a premium to borrow the securities and must pay any dividends or 
interest payable on the securities until they are replaced.

	The Fund's obligation to replace the securities borrowed in 
connection with a short sale will be secured by collateral deposited 
with the broker, which collateral consists of cash or U.S. government 
securities.  In addition, the Fund will place in a segregated account 
with the Custodian an amount of cash, or U.S. government securities 
or other liquid high grade debt obligations equal to the difference, 
if any, between (a) the market value of the securities sold at the 
time they were sold short and (b) any cash or U.S. government 
securities deposited as collateral with the broker in connection with 
the short sale (not including the proceeds of the short sale).  Until 
it replaces the borrowed securities, a Fund will maintain the 
segregated account daily at a level such that the amount deposited in 
the account plus the amount deposited with the broker (not including 
the proceeds from the short sale) will equal the current market value 
of the securities sold short and will not be less than the market 
value of the securities at the time they were sold short.

	The Fund may make short sales "against the box" without 
complying with the limitations described above.  In a short sale 
against the box transaction, a Fund, at the time of the sale, owns or 
has the immediate and unconditional right to acquire at no additional 
cost the identical security sold.

	Illiquid Securities.  The Fund may not invest more than 15% of 
its respective total net assets in illiquid securities, including 
securities that are illiquid by virtue of the absence of a readily 
available market or legal or contractual restrictions on resale. 
Securities that have legal or contractual restrictions on resale but 
have a readily available market are not considered illiquid for 
purposes of this limitation.  The Adviser will monitor on an ongoing 
basis the liquidity of such restricted securities under the 
supervision of the Board of Trustees. 

	The SEC has adopted Rule 144A under the Securities Act of 1933, 
as amended (the "1933 Act") which allows for a broader institutional 
trading market for securities otherwise subject to restriction on 
resale to the general public. Rule 144A establishes a "safe harbor" 
from the registration requirements of the 1933 Act for resales of 
certain securities to qualified institutional buyers. The Fund's 
investment Adviser anticipates that the market for certain restricted 
securities such as institutional commercial paper and institutional 
municipal securities will expand further as a result of this 
regulation and the development of automated systems for the trading, 
clearance and settlement of unregistered securities of domestic and 
foreign issuers, such as the PORTAL system sponsored by the National 
Association of Securities Dealers. 

	The Adviser will monitor the liquidity of restricted securities 
under the supervision of the Board of Trustees. In reaching liquidity 
decisions with respect to Rule 144A securities, the Adviser will 
consider, inter alia, the following factors: (1) the unregistered 
nature of a Rule 144A security; (2) the frequency of trades and 
quotes for a Rule 144A security; (3) the number of dealers willing to 
purchase or sell the Rule 144A security and the number of other 
potential purchasers; (4) dealer undertakings to make a market in the 
Rule 144A security; (5) the trading markets for the Rule 144A 
security; and (6) the nature of the Rule 144A security and the nature 
of marketplace trades (including the time needed to dispose of the 
Rule 144A security, methods of soliciting offers and mechanics of 
transfer). 

	The Appendix to this Statement of Additional Information 
contains a description of the relevant rating symbols used by NRSROs 
for securities that may be purchased by the Fund. 

	Portfolio Turnover.  The Fund will not attempt to set or meet a 
portfolio turnover rate since any turnover would be incidental to 
transactions undertaken in an attempt to achieve the Fund's 
investment objective.

Investment Limitations

The Prospectuses summarize certain investment limitations that may 
not be changed without the affirmative vote of the holders of a 
majority of the Fund's outstanding shares (as defined below under 
"Miscellaneous"). Investment limitations numbered 1 through 7 may not 
be changed without such a vote of shareholders; investment 
limitations 8 through 13 may be changed by a vote of the Trust's 
Board of Trustees at any time.

	The Fund may not: 

	 1.	Purchase securities of any one issuer, other than 
obligations issued or guaranteed by the U.S. government, its agencies 
or instrumentalities, if as a result more than 5% of the value of the 
Fund's assets would be invested in the securities of such issuer, 
except that up to 25% of the value of the Fund's total assets may be 
invested without regard to such 5% limitation and (b) such 5% 
limitation shall not apply to repurchase agreements collateralized by 
obligations of the U.S. government, its agencies or 
instrumentalities. 


	 2.	Borrow money, except that the Fund may (i) borrow money 
for temporary or emergency purposes (not for leveraging or 
investment) and (ii) engage in reverse repurchase agreements or 
dollar roll transactions for any purpose; provided that (i) and (ii) 
in combination do not exceed one-third of the value of the Fund's 
total assets (including the amount borrowed) less liabilities (other 
than borrowings).  For purposes of this investment restriction, short 
sales, swap transactions, options, futures contracts and options on 
futures contracts, and forward commitment transactions shall not 
constitute borrowings.

	 3.	Make loans except that the Fund may purchase or hold debt 
obligations in accordance with its investment objective and policies, 
may enter into repurchase agreements for securities and may lend 
portfolio securities. 

	 4.	Act as an underwriter, except insofar as the Fund may be 
deemed an underwriter under applicable securities laws in selling 
portfolio securities. 

	 5.	Purchase or sell real estate or real estate limited 
partnerships except that the Fund may invest in securities secured by 
real estate or interests therein. 

	 6.	Purchase or sell commodities or commodity contracts, or 
invest in oil, gas or mineral exploration or development programs or 
in mineral leases. 

	 7.	Purchase any securities which would cause 25% or more of 
the value of its total assets at the time of purchase to be invested 
in the securities of issuers conducting their principal business 
activities in the same industry, provided that there is no limitation 
with respect to investments in U.S. government securities. 

	 8.	Knowingly invest more than 15% of the value of the Fund's 
assets in securities that may be illiquid because of legal or 
contractual restrictions on resale or securities for which there are 
no readily available market quotations. 

	 9.	Write or sell puts, calls, straddles, spreads or 
combinations thereof in excess of 5% of its total assets. 

	10.	Invest in securities if as a result the Fund would then 
have more than 5% of its total assets in securities of companies 
(including predecessors) with less than three years of continuous 
operation. 

	11.	Purchase securities of other investment companies in 
excess of 5% of its total assets, except as permitted under the 1940 
Act or in connection with a merger, consolidation, acquisition or 
reorganization. 

	12.	Invest in warrants. 


	In order to permit the sale of Fund shares in certain states, 
the Fund may make commitments more restrictive than the investment 
policies and limitations above. Should the Fund determine that any 
such commitments are no longer in its best interests, it will revoke 
the commitment by terminating sales of its shares in the state 
involved. 


ADDITIONAL PURCHASE AND REDEMPTION INFORMATION

In General

	Information on how to purchase and redeem Fund shares is 
included in the Prospectuses. The issuance of Fund shares is recorded 
on the Fund's books, and share certificates are not issued unless 
expressly requested in writing. Certificates are not issued for 
fractional shares.

	The regulations of the Comptroller of the Currency provide that 
funds held in a fiduciary capacity by a national bank approved by the 
Comptroller to exercise fiduciary powers must be invested in 
accordance with the instrument establishing the fiduciary 
relationship and local law.  The Trust believes that the purchase of 
Fund shares by such national banks acting on behalf of their 
fiduciary accounts is not contrary to applicable regulations if 
consistent with the particular account and proper under the law 
governing the administration of the account.

   
	Conflict of interest restrictions may apply to an institution's 
receipt of compensation paid by the Fund on fiduciary funds that are 
invested in the Fund's Select shares.  Institutions, including banks 
regulated by the Comptroller of the Currency and investment advisers 
and other money managers subject to the jurisdiction of the SEC, the 
Department of Labor or state securities commissions, should consult 
their legal advisors before investing fiduciary funds in the Fund's 
Select shares.
    

	Prior to effecting a redemption of shares represented by 
certificates, The Shareholder Services Group, Inc. ("TSSG"), the 
Trust's transfer agent, must receive such certificates at its 
principal office. All such certificates must be endorsed by the 
redeeming shareholder or accompanied by a signed stock power, in each 
instance with the signature guaranteed by a commercial bank, a member 
of a major stock exchange or other eligible guarantor institution, 
unless other arrangements satisfactory to the Fund have previously 
been made. The Fund may require any additional information reasonably 
necessary to evidence that a redemption has been duly authorized. 

	Under the 1940 Act, the Fund may suspend the right of redemption 
or postpone the date of payment upon redemption for any period during 
which the New York Stock Exchange is closed, other than customary 
weekend and holiday closings, or during which trading on said 
Exchange is restricted, or during which (as determined by the SEC by 
rule or regulation) an emergency exists as a result of which disposal 
or valuation of portfolio securities is not reasonably practicable, 
or for such other periods as the SEC may permit. (The Fund may also 
suspend or postpone the recordation of the transfer of its shares 
upon the occurrence of any of the foregoing conditions.) In addition, 
the Fund may redeem shares involuntarily in certain other instances 
if the Board of Trustees determines that failure to redeem may have 
material adverse consequences to that Fund's shareholders in general.  
The Fund is obligated to redeem shares solely in cash up to $250,000 
or 1% of the Fund's net asset value, whichever is less, for any one 
shareholder within a 90-day period. Any redemption beyond this amount 
will also be in cash unless the Board of Trustees determines that 
conditions exist which make payment of redemption proceeds wholly in 
cash unwise or undesirable. In such a case, the Fund may make payment 
wholly or partly in readily marketable securities or other property, 
valued in the same way as the Fund determines net asset value. See 
"Net Asset Value" below for an example of when such redemption or 
form of payment might be appropriate. Redemption in kind is not as 
liquid as a cash redemption. Shareholders who receive a redemption in 
kind may incur transaction costs if they sell such securities or 
property, and may receive less than the redemption value of such 
securities or property upon sale, particularly where such securities 
are sold prior to maturity. 

		Any institution purchasing shares on behalf of separate 
accounts will be required to hold the shares in a single nominee name 
(a "Master Account").  Institutions investing in more than one of the 
Funds or classes must maintain a separate Master Account for each 
Fund and class of shares.  Institutions may arrange with TSSG for 
certain sub-accounting services (such as purchase, redemption and 
dividend record keeping).  Sub-accounts may be established by name or 
number either when the Master Account is opened or later.

Net Asset Value

	The Fund's net asset value per share is calculated by dividing 
the total value of the assets belonging to the Fund, less the value 
of any liabilities charged to the Fund, by the total number of the 
Fund's shares outstanding (irrespective of class or series). "Assets 
belonging to" the Fund consist of the consideration received upon the 
issuance of Fund shares together with all income, earnings, profits 
and proceeds derived from the investment thereof, including any 
proceeds from the sale, exchange or liquidation of such investments, 
any funds or payments derived from any reinvestment of such proceeds 
and a portion of any general assets of the Trust not belonging to a 
particular portfolio. Assets belonging to the Fund are charged with 
the direct liabilities of the Fund and with a share of the general 
liabilities of the Trust allocated on a daily basis in proportion to 
the relative net assets of the Fund and the Trust's other portfolios. 
Determinations made in good faith and in accordance with generally 
accepted accounting principles by the Trust's Board of Trustees as to 
the allocation of any assets or liabilities with respect to the Fund 
are conclusive. 

	As stated in the Prospectuses, portfolio securities for which 
market quotations are readily available will be valued on the basis 
of quotations provided by dealers in such securities or furnished by 
a pricing service.  Portfolio securities for which market quotations 
are not readily available and other assets will be valued at fair 
value using methods determined in good faith by the Investment 
Adviser under the supervision of the Trustees and may include yield 
equivalents or a pricing matrix.

MANAGEMENT OF THE FUND

Trustees and Officers

	The Trust's trustees and executive officers, their addresses, 
principal occupations during the past five years and other 
affiliations are as follows: 

Name and Address
Position with the 
Trust
Principal Occupations During 
Past 5 Years and Other 
Affiliations


STEVEN SPIEGEL (1)
World Financial 
Center
New York, NY 10285

Chairman of the 
Board and Trustee
Managing Director, Lehman 
Brothers; President, Lehman 
Brothers Global Asset 
Management Inc.; formerly 
Chairman, Lehman Brothers 
International (Europe)


CHARLES F. 
BARBER (2)(3)
66 Glenwood Drive
Greenwich, CT 
06830
Trustee
Consultant; Director, The 
Salomon Brothers Fund Inc., 
The Emerging Markets Income 
Fund Inc., Salomon Brothers 
High Income Fund Inc. and 
Municipal Partners Fund Inc.; 
formerly Chairman of the 
Board, ASARCO Incorporated


BURT N. 
DORSETT (2)(3)
201 East 62nd 
Street
New York, NY 10022
Trustee
Managing Partner, Dorsett 
McCabe Capital Management, 
Inc., an investment 
counseling firm; Director, 
Research Corporation 
Technologies, a non-profit 
patent-clearing and licensing 
operation; formerly 
President, Westinghouse 
Pension Investments 
Corporation; formerly 
Executive Vice President and 
Trustee, College Retirement 
Equities Fund, Inc., a 
variable annuity fund; and 
formerly Investment Officer, 
University of Rochester


EDWARD J. 
KAIER (2)(3)
1100 One Penn 
Center
Philadelphia, PA 
19103

Trustee
Partner with the law firm of 
Hepburn Willcox Hamilton & 
Putnam

S. DONALD 
WILEY (2)(3)
USX Tower
Pittsburgh, PA 
15219
Trustee
Vice Chairman and Trustee, 
H.J. Heinz Company 
Foundation; prior to October 
1990, Senior Vice President, 
General Counsel and 
Secretary, H.J. Heinz Company


PETER MEENAN
One Exchange Place
Boston, MA 02109
President
Managing Director of Lehman 
Brothers since May 1993, 
Senior Executive Vice 
President and Director of 
Institutional Funds Services, 
The Boston Company-
 Advisers, Inc., from 
February 1984 to May 1993; 
Senior Vice President, The 
Boston Company, Inc. from 
August 1984 to May 1993; 
Director, The Boston Company 
Advisers, Inc. 


JOHN M. WINTERS
World Financial 
Center
New York, NY 10285

Vice President and 
Investment Officer
Senior Vice President, Lehman 
Brothers 

VINCENT NAVE
One Boston Place
Boston, MA 02109
Treasurer
Senior Vice President, The 
Boston Company Advisers, Inc. 
and Boston Safe Deposit and 
Trust Company


FRANCIS J. 
McNAMARA, III
One Boston Place
Boston, MA 02109
Secretary
Senior Vice President and 
General Counsel, The Boston 
Company Advisers, Inc.

- --------

1.  Considered by the Trust to be an "interested person" of the Trust as 
defined in the 1940 Act.

2.  Audit Committee Member.

3.  Nominating Committee Member.

	Two of the Trust's Trustees, Messrs. Barber and Dorsett, serve 
as trustees or directors of other investment companies for which 
Lehman Brothers, the Adviser or one of their affiliates serves as 
distributor or investment adviser. 

	No employee of Lehman Brothers, LBGAM or The Boston Company 
Advisers, Inc. ("Boston Advisers") receives any compensation from the 
Trust for acting as an officer or trustee of the Trust. The Trust 
pays each trustee who is not a director, officer or employee of 
Lehman Brothers, LBGAM or Boston Advisers or any of their affiliates, 
a fee of $20,000 per annum plus $1,250 per meeting attended and 
reimburses them for travel and out-of-pocket expenses. 

	By virtue of the responsibilities assumed by Lehman Brothers, 
LBGAM, Boston Advisers and their affiliates under their respective 
agreements with the Trust, the Trust itself requires no employees in 
addition to its officers. 

Administrator

	As the Fund's administrator, Boston Advisers has agreed to 
provide the following services: (i) assist generally in supervising 
the Fund's operations, providing and supervising the operation of an 
automated data processing system to process purchase and redemption 
orders, providing information concerning the Fund to its shareholders 
of record, handling shareholder problems, supervising the services of 
employees whose principal responsibility and function is to preserve 
and strengthen shareholder relations and monitoring the arrangements 
pertaining to the Fund's agreements with Service Organizations; 
(ii) prepare reports to the Fund's shareholders and prepare tax 
returns and reports to and filings with the SEC; (iii) compute the 
respective net asset value per share of the Fund; (iv) provide the 
services of certain persons who may be elected as trustees or 
appointed as officers of the Trust by the Board of Trustees; and 
(v) maintain the registration or qualification of Fund shares for 
sale under state securities laws. 

	Prior to May 21, 1993, BGH, the parent company of TBC, Boston 
Advisors and Boston Safe Deposit and Trust Company ("Boston Safe"), 
was owned by Lehman Brothers.  In connection with the sale of BGH by 
Lehman Brothers to Mellon, Lehman Brothers and its affiliates 
conditionally agreed (with certain exceptions including one for 
certain of Lehman Brothers' current businesses) not to provide 
Custody Services, Administration Services or Master Trust Services 
(as each is defined in the agreement with Mellon) for periods of from 
one to seven years depending on the affiliate, the service and the 
client.  Thus, Lehman Brothers has agreed not to provide Custody 
Services or Administration Services to the Fund.  In addition, for 
the seven-year period commencing on May 21, 1993, Lehman Brothers has 
agreed, consistent with its fiduciary duties and assuming certain 
service quality standards are met, to continue to recommend BGH and 
its subsidiaries as the providers of such Custody Services and 
Administration Services as are currently to be provided by BGH and 
its subsidiaries to the Fund.

Distributors

	Lehman Brothers acts as a distributor of Fund shares. Funds 
Distributor, Inc. ("Funds Distributor") also serves as a distributor 
and, as such, may sell Fund shares to dealers as agent of the Fund. 
The Fund's shares are sold on a continuous basis by Lehman Brothers 
as agent, although neither distributor is obliged to sell any 
particular amount of shares. The distributors pay the cost of 
printing and distributing prospectuses to persons who are not 
shareholders of the Fund (excluding preparation and printing expenses 
necessary for the continued registration of Fund shares) and of 
preparing, printing and distributing all sales literature. No 
compensation is payable by the Fund to Lehman Brothers or Funds 
Distributor for their distribution services. 

	Lehman Brothers is comprised of several major operating business 
units. Lehman Brothers Institutional Funds Group is the business 
group within Lehman Brothers that is primarily responsible for the 
distribution and client service requirements of the Trust and its 
shareholders. Lehman Brothers Institutional Funds Group has been 
serving institutional clients' investment needs exclusively for more 
than 20 years, emphasizing high quality individualized service to 
clients. 

Plan of Distribution
   
	The Fund currently offers Institutional Shares, Select Shares 
and Premier Shares.  As stated in the Fund's Prospectuses, the Board 
of Trustees of the Trust has adopted a plan of distribution (the 
"Plan of Distribution" or "Plan") applicable to Institutional Shares, 
Select Shares and Premier Shares of the Fund pursuant to Rule 12b-1 
under the 1940 Act.
    
   
	Institutional Shares are sold to institutional investors that 
have not entered into servicing or other agreements with the Fund in 
connection with their investments and pay no Rule 12b-1 distribution 
or shareholder service fee.  However, the Plan provides that Lehman 
Brothers may make payments to assist in the distribution of 
Institutional Shares out of the other fees received by it or its 
affiliates from the Fund, its past profits or any other sources 
available to it.  Pursuant to the Plan of Distribution Select Shares 
of the Fund are sold to institutional investors and bear fees payable 
at a rate not exceeding .35% (on an annualized basis) of the average 
daily net asset value of the shares beneficially owned by such 
investors in return for certain administrative and shareholder 
services provided by Lehman Brothers or the institutional investors.  
These services may include processing purchase, exchange and 
redemption requests from customers and placing orders with the 
Transfer Agent; processing dividend and distribution payments from 
the Fund on behalf of customers; providing information periodically 
to customers showing their positions in shares; responding to 
inquiries from customers concerning their investment in shares; 
arranging for bank wires; and providing such other similar services 
as may be reasonably requested.  In addition, the Plan of 
Distribution provides that Lehman Brothers may retain all or a 
portion of the payments made to it pursuant to the Plan and may make 
payments to third parties that provide assistance in selling Select 
Shares, or to institutions that provide certain shareholder support 
services to investors.  These services may include: (i) aggregating 
and processing purchase and redemption requests from customers and 
placing net purchase and redemption orders with the Fund's 
distributor; (ii) processing dividend payments from the Fund on 
behalf of customers; (iii) providing information periodically to 
customers showing their positions in a Fund's shares; (iv) arranging 
for bank wires; (v) responding to customer inquiries relating to the 
services performed by the Institution and handling correspondence; 
(vi) forwarding shareholder communications from a Fund (such as 
proxies, shareholder reports, annual and semi-annual financial 
statements, and dividend, distribution and tax notices) to customers; 
(vii) acting as shareholder of record or nominee; and (viii) other 
similar account administrative services.  Premier Shares are offered 
by Lehman Brothers directly to individual investors.  Pursuant to the 
Plan of Distribution, the Fund has agreed to pay Lehman Brothers a 
monthly fee at an annual rate of up to .50% of the average daily net 
asset value of the Premier Shares for distribution and other services 
provided to holders of Premier Shares.  Shares of each class will 
bear all fees paid for services provided to that class under the Plan 
of Distribution.
    

	Under the Plan of Distribution, the Board of Trustees reviews, 
at least quarterly, a written report of the amounts expended under 
the Fund's Plan and the purposes for which the expenditures were 
made. In addition, the Fund's Plan must be approved annually by a 
majority of the Trust's trustees, including a majority of the 
trustees who are not "interested persons" of the Trust as defined in 
the 1940 Act and have no direct or indirect financial interest in 
such arrangements (the "Disinterested Trustees").  

	In adopting the Plan, the Board of Trustees, as required by the 
Rule, carefully considered all pertinent factors relating to the 
implementation of the Plan prior to its approval and determined that 
there is a reasonable likelihood that the arrangements will benefit 
the Fund and its shareholders by affording the Fund greater 
flexibility in connection with the servicing of the accounts of the 
beneficial owners of shares in an efficient manner.  Any material 
amendment to a Plan must be approved by a majority of the Trust's 
Board of Trustees (including a majority of the Disinterested 
Trustees). So long as the Plan is in effect, the selection and 
nomination of the members of the Trust's Board of Trustees who are 
not "interested persons" (as defined in the 1940 Act) of the Trust 
will be committed to the discretion of interested Trustees. 

Custodian and Transfer Agent

	Boston Safe Deposit and Trust Company ("Boston Safe"), a wholly-
owned subsidiary of The Boston Company, Inc., is located at One 
Boston Place, Boston, Massachusetts 02108, and serves as the 
custodian of the Trust pursuant to a custody agreement. Under the 
custody agreement, Boston Safe holds each Fund's portfolio securities 
and keeps all necessary accounts and records. For its services, 
Boston Safe receives a monthly fee based upon the month-end market 
value of securities held in custody and also receives securities 
transaction charges, including out-of-pocket expenses. The assets of 
the Trust are held under bank custodianship in compliance with the 
1940 Act. 

	The Shareholder Services Group, Inc. ("TSSG"), a subsidiary of 
First Data Corporation, is located at One Exchange Place, Boston, 
Massachusetts, and serves as the Trust's transfer agent. Under the 
transfer agency agreement, TSSG maintains the shareholder account 
records for the Trust, handles certain communications between 
shareholders and the Trust and distributes dividends and 
distributions payable by the Trust and produces statements with 
respect to account activity for the Trust and its shareholders. For 
these services, TSSG receives a monthly fee computed on the basis of 
the amount of assets under management by the Fund and is reimbursed 
for out-of-pocket expenses.

Expenses

	The Fund's expenses include taxes, interest, fees and salaries 
of the Trust's trustees and officers who are not directors, officers 
or employees of the Trust's service contractors, SEC fees, state 
securities qualification fees, costs of preparing and printing 
prospectuses for regulatory purposes and for distribution to 
shareholders, Advisory and administration fees, charges of the 
custodian and of the transfer and dividend disbursing agent, 12b-1 
fees, certain insurance premiums, outside auditing and legal 
expenses, costs of shareholder reports and shareholder meetings and 
any extraordinary expenses. The Fund also pays for brokerage fees and 
commissions (if any) in connection with the purchase and sale of 
portfolio securities. LBGAM and Boston Advisers have agreed that if, 
in any fiscal year, the expenses borne by the Fund exceed the 
applicable expense limitations imposed by the securities regulations 
of any state in which shares of that Fund are registered or qualified 
for sale to the public, they will reimburse the Fund for any excess 
to the extent required by such regulations. Unless otherwise required 
by law, such reimbursement would be accrued and paid on the same 
basis that the Advisory and administration fees are accrued and paid 
by the Fund. To the Fund's knowledge, of the expense limitations in 
effect on the date of this Statement of Additional Information, none 
is more restrictive than two and one-half percent (21/2%) of the 
first $30 million of a Fund's average annual net assets, two percent 
(2%) of the next $70 million of the average annual net assets and one 
and one-half percent (11/2%) of the remaining average annual net 
assets. 

ADDITIONAL INFORMATION CONCERNING TAXES

The following summarizes certain additional tax considerations 
generally affecting the Fund and its shareholders that are not 
described in the Prospectuses. No attempt is made to present a 
detailed explanation of the tax treatment of the Fund or its 
shareholders or possible legislative changes, and the discussion here 
and in the Prospectuses is not intended as a substitute for careful 
tax planning. Investors should consult their tax Advisers with 
specific reference to their own tax situation. 
 
	As stated in the Prospectuses, the Fund is treated as a separate 
corporate entity under the Code and intends to qualify as a regulated 
investment company under the Code. In order to so qualify for a 
taxable year, the Fund must satisfy the distribution requirement 
described in the Prospectuses, derive at least 90% of its gross 
income for the year from certain qualifying sources, comply with 
certain diversification requirements and derive less than 30% of its 
gross income for the year from the sale or other disposition of 
securities and certain other investments held for less than three 
months. Interest (including original issue discount and, with respect 
to taxable debt securities, accrued market discount) received by a 
Fund at maturity or disposition of a security held for less than 
three months will not be treated as gross income derived from the 
sale or other disposition of such security within the meaning of the 
30% requirement. However, any other income which is attributable to 
realized market appreciation will be treated as gross income from the 
sale or other disposition of securities for this purpose. 

	A 4% nondeductible excise tax is imposed on regulated investment 
companies that fail to distribute currently an amount equal to 
specified percentages of their ordinary taxable income and capital 
gain net income (excess of capital gains over capital losses).  The 
Fund intends to make sufficient distributions or deemed distributions 
of any ordinary taxable income and any capital gain net income prior 
to the end of each calendar year to avoid liability for  this excise 
tax. 

	If for any taxable year the Fund does not qualify for tax 
treatment as a regulated investment company, all of the Fund's 
taxable income will be subject to tax at regular corporate rates 
without any deduction for distributions to Fund shareholders. In such 
event, dividend distributions to shareholders would be taxable to 
shareholders to the extent of the Fund's earnings and profits, and 
would be eligible for the dividends received deduction for 
corporations.

	The Fund will be required in certain cases to withhold and remit 
to the U.S. Treasury 31% of taxable dividends or 31% of gross 
proceeds realized upon sale paid to its shareholders who have failed 
to provide a correct tax identification number in the manner 
required, or who are subject to withholding by the Internal Revenue 
Service for failure properly to include on their return payments of 
taxable interest or dividends, or who have failed to certify to a 
Fund that they are not subject to backup withholding when required to 
do so or that they are "exempt recipients." 

	The Fund's investment in certain derivative Mortgage-Backed 
Securities and other securities issued with original issue discount 
or acquired at a market discount (if the Fund elects to include 
market discount in income on an annual basis) will cause it to 
realize income prior to the receipt of cash payments with respect to 
these securities.  In order to distribute this income and avoid a tax 
on the Fund, the Fund may be required to liquidate portfolio 
securities that it might otherwise have continued to hold.

	Although the Fund expects to qualify as a "regulated investment 
company" and to be relieved of all or substantially all federal 
income taxes, depending upon the extent of its activities in states 
and localities in which its offices are maintained, in which its 
agents or independent contractors are located or in which they are 
otherwise deemed to be conducting business, a Fund may be subject to 
the tax laws of such states or localities.  In addition, in those 
states and localities which have income tax laws, the treatment of 
the Fund and its shareholders under such laws may differ from the 
treatment under federal income tax laws.  Shareholders are advised to 
consult their tax Advisers concerning the application of state and 
local taxes. 

* * * * * * * * * * * * * * * * * * * * * * * *

	The foregoing discussion is based on federal tax laws and 
regulations which are in effect on the date of this Statement of 
Additional Information; such laws and regulations may be changed by 
legislative or administrative action. 

DIVIDENDS
   
The Fund's net investment income for dividend purposes consists of 
(i) interest accrued and discount earned on the Fund's assets, (ii) 
plus the amortization of market discount, (iii) less amortization of 
market premium on such assets, (iv) less accrued expenses directly 
attributable to the Fund, and the general expenses (e.g., legal, 
accounting and trustees' fees) of the Trust prorated to the Fund on 
the basis of its relative net assets.  Realized and unrealized gains 
and losses on portfolio securities are reflected in net asset value.  
In addition, Institutional and Select shares bear exclusively the 
expense of fees paid to Lehman Brothers or other institutions with 
respect to the relevant Class of shares. See "Management of the Fund-
Plan of Distribution".
    

ADDITIONAL PERFORMANCE INFORMATION
   
The "total return", "yields," "effective yields" and "distribution 
rates" are calculated separately for each class of shares of the 
Fund.  "Total return" for a particular class of shares represents the 
change, over specified period of time, in the value of an investment 
in the shares after reinvesting all income and capital gain 
distributions.  It is calculated by dividing that change by the 
initial investment and is expressed as a percentage.  The "yield" 
quoted in advertisements for a particular class of shares refers to 
the income generated by an investment in such shares over a specified 
period (such as a thirty-day period) identified in the advertisement.  
This income is then "annualized;" that is, the amount of income 
generated by the investment during that period is assumed to be 
generated each such period over a 52-week or one-year period and is 
shown as a percentage of the investment.  The "effective yield" is 
calculated similarly but, when annualized, the income earned by an 
investment in a particular class is assumed to be reinvested.  The 
"effective yield" will be slightly higher than the "yield" because of 
the compounding effect of this assumed reinvestment.  The 
distribution rate for a specified period is calculated by annualizing 
distributions of net investment income for such and dividing this 
amount by the ending net asset value for such period.  
    
   
	From time to time, in advertisements or in reports to 
shareholders, the performance of the Fund may be quoted and compared 
to that of other funds or accounts with similar investment objectives 
and to stock or other relevant indices. For example, the yields of 
the Fund may be compared to various independent sources, including, 
but not limited to, Lipper Analytical Services, Inc., Morningstar, 
Inc., Barron's, The Wall Street Journal, Weisenberger Investment 
Companies Service, IBC/Donoghue's Inc. Bond Fund Report, Business 
Week, Financial World, Fortune, Money and Forbes.  In addition, the 
Fund's performance as compared to certain indices and benchmark 
investments may include: (a) the Lehman Brothers Government/Corporate 
(Total) Index, (b) Lehman Brothers Government Index, (c) Merrill 
Lynch 1-3 Year Treasury Index, (d) Merrill Lynch 2-Year Treasury 
Curve Index, (e) the Salomon Brothers Treasury Yield Curve Rate of 
Return Index, (f) the Payden & Rygel 2 year Treasury Note Index, (g) 
1 through 3 year U.S. Treasury Notes, (h) constant maturity U.S. 
Treasury yield indices, (i) the Consumer Price Index, (j) the London 
Interbank Offered Rate, (k) other taxable investments such as 
certificates of deposit, money market deposit accounts, checking 
accounts, savings accounts, money market mutual funds, repurchase 
agreements, commercial paper, and (1) historical data concerning the 
performance of adjustable and fixed-rate mortgage loans.
    

	The composition of the securities in such indices and the 
characteristics of such benchmark investments are not identical to, 
and in some cases are very different from, those of the Fund's 
portfolios.  These indices and averages are generally unmanaged and 
the items included in the calculations of such indices and averages 
may not be identical to the formulas used by the Fund to calculate 
its performance figures.

	From time to time, advertisements or communications to 
shareholders may summarize the substance of information contained in 
shareholder reports (including the investment composition of the 
Fund), as well as the views of Lehman Brothers as to current market, 
economic, trade and interest rate trends, legislative, regulatory and 
monetary developments, investment strategies and related matters 
believed to be of relevance to the Fund (such as the supply and 
demand of mortgage-related securities and the relative performance of 
different types of mortgage loans and mortgage-related securities as 
affected by prepayment rates and other factors).

	The Fund may from time to time summarize the substance of 
discussions contained in shareholder reports in advertisements and 
publish the Investment Adviser's views as to markets, the rationale 
for the Fund's investments and discussions of the Fund's current 
asset allocation.

	In addition, advertisements or shareholder communications may 
include a discussion of certain attributes of the Fund such as 
average portfolio maturity or benefits to be derived by an investment 
in the Fund.  Such advertisements or communications may include 
symbols, headlines or other material which highlight or summarize the 
information discussed in more detail therein.
 
	The Fund's total return and yield figures for a class of shares 
will fluctuate, and any quotation of yield should not be considered 
as representative of the future performance of the Fund. Since total 
return and yields fluctuate, yield and total return data for the Fund 
cannot necessarily be used to compare an investment in Fund shares 
with bank deposits, savings accounts and similar investment 
alternatives which often provide an agreed or guaranteed fixed yield 
for a stated period of time. Shareholders should remember that 
performance of any investment is generally a function of the kind and 
quality of the investments held in a portfolio, portfolio maturity, 
operating expenses and market conditions.  Any fee charged by 
institutions with respect to customer accounts investing in shares of 
a Fund will not be included in total return or yield calculations; 
such fees, if charged, would reduce the actual total return and yield 
from that quoted. 

ADDITIONAL DESCRIPTION CONCERNING SHARES

	The Trust does not presently intend to hold annual meetings of 
shareholders except as required by the 1940 Act or other applicable 
law. The law under certain circumstances provides shareholders with 
the right to call for a meeting of shareholders to consider the 
removal of one or more trustees. To the extent required by law, the 
Trust will assist in shareholder communication in such matters. 

	Fund shares represent an equal, proportionate interest in assets 
belonging to the Fund. Each share, which has a par value of $.001, 
has no preemptive or conversion rights. When issued for payment as 
described in the Prospectuses, Fund shares will be fully paid and 
non-assessable.  As stated in the Prospectuses, holders of shares in 
the Fund will vote in the aggregate and not by class or series on all 
matters, except where otherwise required by law. (See "Management of 
the Fund-Plan of Distribution.") Further, shareholders of all of the 
Trust's portfolios will vote in the aggregate and not by portfolio 
except as otherwise required by law or when the Board of Trustees 
determines that the matter to be voted upon affects only the 
interests of the shareholders of a particular portfolio. Rule 18f-2 
under the 1940 Act provides that any matter required to be submitted 
by the provisions of such Act or applicable state law, or otherwise, 
to the holders of the outstanding securities of an investment company 
such as the Trust shall not be deemed to have been effectively acted 
upon unless approved by the holders of a majority of the outstanding 
shares of each portfolio affected by the matter. Rule 18f-2 further 
provides that a portfolio shall be deemed to be affected by a matter 
unless it is clear that the interests of each portfolio in the matter 
are identical or that the matter does not affect any interest of the 
portfolio. Under the Rule the approval of an Investment Advisory 
agreement or any change in a fundamental investment policy would be 
effectively acted upon with respect to a portfolio only if approved 
by the holders of a majority of the outstanding voting securities of 
such portfolio. However, the Rule also provides that the ratification 
of the selection of independent certified public accountants, the 
approval of principal underwriting contracts and the election of 
trustees are not subject to the separate voting requirements and may 
be effectively acted upon by shareholders of the investment company 
voting without regard to portfolio.

	Voting rights are not cumulative; and, accordingly, the holders 
of more than 50% of the aggregate shares of the Trust may elect all 
of the trustees. 

COUNSEL

	Willkie Farr & Gallagher, One Citicorp Center, New York, New 
York 10022, serves as counsel of the Trust and will pass upon the 
legality of the shares offered hereby. Willkie Farr & Gallagher also 
serves as counsel to Lehman Brothers. 

AUDITORS 

	Ernst & Young, 200 Clarendon Street, Boston, Massachusetts 
02116-5072 serves as independent accountants of the Trust and will 
issue reports on the statement of assets and liabilities of the Fund. 

MISCELLANEOUS

Shareholder Vote

	As used in this Statement of Additional Information and the 
Fund's Prospectuses, a "majority of the outstanding shares" of the 
Fund or of any other portfolio means the lesser of (1) 67% of shares 
(irrespective of class) or of the portfolio represented at a meeting 
at which the holders of more than 50% of the outstanding shares of 
the Fund or such portfolio are present in person or by proxy, or (2) 
more than 50% of the outstanding shares of the Fund (irrespective of 
class) or of the portfolio. 

Shareholder and Trustee Liability

	The Trust is organized as a trust under the laws of the 
Commonwealth of Massachusetts. Shareholders of such a trust may, 
under certain circumstances, be held personally liable (as if they 
were partners) for the obligations of the trust. The Declaration of 
Trust of the Trust provides that shareholders shall not be subject to 
any personal liability for the acts or obligations of the Trust and 
that every note, bond, contract, order or other undertaking made by 
the Trust shall contain a provision to the effect that the 
shareholders are not personally liable thereunder. The Declaration of 
Trust provides for indemnification out of the trust property of a 
Fund of any shareholder of the Fund held personally liable solely by 
reason of being or having been a shareholder and not because of any 
acts or omissions or some other reason. The Declaration of Trust also 
provides that the Trust shall, upon request, assume the defense of 
any claim made against any shareholder for any act or obligation of 
the Trust and satisfy any judgment thereon. Thus, the risk of a 
shareholder incurring financial loss beyond the amount invested in a 
Fund on account of shareholder liability is limited to circumstances 
in which the Fund itself would be unable to meet its obligations. 

	The Trust's Declaration of Trust provides further that no 
trustee of the Trust shall be personally liable for or on account of 
any contract, debt, tort, claim, damage, judgment or decree arising 
out of or connected with the administration or preservation of the 
trust estate or the conduct of any business of the Trust, nor shall 
any trustee be personally liable to any person for any action or 
failure to act except by reason of bad faith, willful misfeasance, 
gross negligence in performing duties, or by reason of reckless 
disregard for the obligations and duties as trustee. It also provides 
that all persons having any claim against the trustees or the Trust 
shall look solely to the trust property for payment. With the 
exceptions stated, the Declaration of Trust provides that a trustee 
is entitled to be indemnified against all liabilities and expenses 
reasonably incurred in connection with the defense or disposition of 
any proceeding in which the trustee may be involved or may be 
threatened with by reason of being or having been a trustee, and that 
the trustees have the power, but not the duty, to indemnify officers 
and employees of the Trust unless such persons would not be entitled 
to indemnification if they were in the position of trustee. 



APPENDIX

DESCRIPTION OF RATINGS


	A Standard & Poor's commercial paper rating is a current 
assessment of the likelihood of timely payment of debt having an 
original maturity of no more than 365 days. The following summarizes 
the two highest rating categories used by Standard & Poor's for 
commercial paper: 

	"A-1" - Issue's degree of safety regarding timely payment is 
strong. Those issues determined to possess extremely strong safety 
characteristics are denoted "A-1+." 

	"A-2" - Issue's capacity for timely payment is satisfactory. 
However, the relative degree of safety is not as high as for issues 
designated "A-1." 

	Moody's commercial paper ratings are opinions of the ability of 
issuers to repay punctually promissory obligations not having an 
original maturity in excess of 9 months. The following summarizes the 
two highest rating categories used by Moody's for commercial paper: 

	"Prime-1" - Issuer or related supporting institutions are 
considered to have a superior capacity for repayment of short-term 
promissory obligations. Principal repayment capacity will normally be 
evidenced by the following characteristics: leading market positions 
in well-established industries; high rates of return on funds 
employed; conservative capitalization structures with moderate 
reliance on debt and ample asset protection; broad margins in earning 
coverage of fixed financial charges and high internal cash 
generation; and well-established access to a range of financial 
markets and assured sources of alternate liquidity. 

	"Prime-2" - Issuer or related supporting institutions are 
considered to have a strong capacity for repayment of short-term 
promissory obligations. This will normally be evidenced by many of 
the characteristics cited above but to a lesser degree. Earnings 
trends and coverage ratios, while sound, will be more subject to 
variation. Capitalization characteristics, while still appropriate, 
may be more affected by external conditions. Ample alternative 
liquidity is maintained. 


Lehman Brothers Institutional Funds Group Trust
   
Floating Rate U.S. Government Fund
    



Statement of Additional Information

   
February 21, 1994
    

   
	This Statement of Additional Information is meant to be read in 
conjunction with the Prospectuses for the Floating Rate U.S. 
Government Fund, each dated February 21, 1994, as amended or 
supplemented from time to time (the "Prospectuses"), and is 
incorporated by reference in its entirety into the Prospectuses. 
Because this Statement of Additional Information is not itself a 
prospectus, no investment in shares of the Floating Rate U.S. 
Government Fund should be made solely upon the information contained 
herein. Copies of the Prospectuses may be obtained by calling Lehman 
Brothers Inc. ("Lehman Brothers") at 1-800-368-5556. Capitalized 
terms used but not defined herein have the same meanings as in the 
Prospectuses.
    


TABLE OF CONTENTS 


Page

The Trust	
2

Investment Objective and Policies	
2

Additional Purchase and Redemption 
Information	
11

Management of the Fund	
12

Additional Information Concerning Taxes	
17

Dividends	
18

Additional Performance Information	
18

Additional Description Concerning Shares	
19

Counsel	
20

Auditors	
20

Miscellaneous	
20

Appendix	
A-1




THE TRUST
   
Lehman Brothers Institutional Funds Group Trust (the "Trust") is a 
no-load, open-end management investment company. The Trust is a 
diversified investment portfolio and currently includes 12 separate 
portfolios, one of which is the Floating Rate U.S. Government Fund 
(the "Fund").  The Fund currently offers three classes of shares.  
Each class represents an equal, pro rata interest in the Fund.  Each 
share accrues daily dividends in the same manner, except that Select 
Shares bear fees payable by the Fund to Lehman Brothers or 
institutional investors for services they provide to the beneficial 
owners of such shares and Premier Shares bear fees payable by the 
Fund to Lehman Brothers for services it provides to the beneficial 
owners of such shares. 
    

	THIS STATEMENT OF ADDITIONAL INFORMATION AND THE FUND'S 
PROSPECTUSES RELATE PRIMARILY TO THE FUND AND DESCRIBE ONLY THE 
INVESTMENT OBJECTIVE AND POLICIES, OPERATIONS, CONTRACTS AND OTHER 
MATTERS RELATING TO THE FUND.  INVESTORS WISHING TO OBTAIN SIMILAR 
INFORMATION REGARDING THE TRUST'S OTHER PORTFOLIOS MAY OBTAIN 
INFORMATION DESCRIBING THEM BY CONTACTING LEHMAN BROTHERS AT 
800-368-5556.

INVESTMENT OBJECTIVE AND POLICIES 

As stated in the Fund's Prospectuses, the investment objective of the 
Fund is to provide a high level of current income consistent with 
minimal fluctuation of net asset value.  The Fund invests primarily 
in a portfolio consisting of U.S. government and agency securities, 
including floating rate and adjustable rate mortgage securities.  The 
following policies supplement the description of the Fund's 
investment objective and policies as contained in the Prospectuses.

Types of Investments

	The Fund pursues its investment objective by investing at least 
65% of its total assets in adjustable and floating rate securities 
which are issued or guaranteed as to payment of principal and 
interest by the U.S. government, its agencies or instrumentalities.  
The Fund may also invest up to 10% of its total assets in U.S. 
government stripped mortgage-backed securities.  Mortgage-backed 
securities and other U.S. government or agency obligations are backed 
by either:

*	the full faith and credit of the U.S. Treasury;

*	the issuer's right to borrow from the U.S. Treasury;

*	the discretionary authority of the U.S. government to purchase 
certain obligations of agencies or instrumentalities; or

*	the credit of the agency or instrumentality issuing the 
obligations.


	Examples of agencies and instrumentalities which may not always 
receive financial support from the U.S. government are:

*	Federal Farm Credit Banks;

*	Federal Home Loan Banks;

*	Federal National Mortgage Association;

*	Student Loan Marketing Association; and

*	Federal Home Loan Mortgage Corporation.

Mortgage Loans and Mortgage-Backed Securities

	Indices Applicable to Adjustable Rate Mortgage Loans ("ARMS").  
Commonly used indices applicable to ARMS comprising a mortgage pool 
include the Six Month Treasury Index, the One Year Treasury Index, 
the Three Year Treasury Index and the 11th District Cost of Funds 
Index.

	The One Year Treasury Index is calculated by fitting a yield 
curve to the median closing bid yield on actively traded U.S. 
Treasury securities in the over-the- counter market, as reported by 
the five leading government securities dealers to the Federal Reserve 
Bank of New York.  The Yield is for a "constant maturity" and is 
estimated from the Treasury's daily yield curve.  The Index is then 
computed as a weekly average of the daily fitted values.

	The Eleventh District Index is normally published by the Federal 
Home Loan Bank ("FHLB") is San Francisco on the last day on which the 
FHLB of San Francisco is open for business in each month.  When the 
Eleventh District Index is announced by the last working day of the 
month, it indicated the monthly weighted average cost of funds for 
savings institutions in the Eleventh District of the FHLB System (the 
"Eleventh District," which consists of California, Nevada and 
Arizona) for the month preceding the month in which the Eleventh 
District Index is published.  The Eleventh District Index for a 
particular month reflects the interest costs paid on all types of 
funds held by Eleventh District member institutions and is calculated 
by dividing the cost of funds by the average of the total amount of 
those funds outstanding at the end of the month and the prior month, 
and annualizing the adjusting the result to reflect the actual number 
of days in the particular month.  If necessary, before these 
calculations are made, the component figures are adjusted by the FHLB 
of San Francisco to neutralize the effect of events such as member 
institutions leaving the Eleventh District or acquiring institutions 
outside the Eleventh District.

	Adjustable Rate Mortgage-Backed Securities Market.	  The 
market for U.S. government agency adjustable rate mortgage-backed 
securities has developed rapidly in recent years, with over $110 
billion in such securities now issued.  ARMS have accounted for a 
major portion of mortgage or organizations since federally chartered 
thrifts were permitted to originate them in 1981.  The growth of the 
market for U.S. government agency adjustable rate mortgage-backed 
securities is the result of this increasing popularity of ARMS, new 
investment products and research.


	Legal Considerations of Mortgage Loans.  The following is a 
discussion of certain legal regulatory aspects of all mortgage loans 
including the adjustable and fixed rate mortgage loans expected to 
underlie the Mortgage-Backed Securities in which the Fund will 
invest.  These regulations may impair the ability of a mortgage 
lender to enforce its rights under the mortgage documents.  Even 
though the Fund will invest in Mortgage-Backed Securities issued or 
guaranteed by the U.S. Government, its agencies or instrumentalities, 
these regulations may adversely affect the Fund's investments by 
delaying the Fund's receipt of payments derived form principal or 
interest on mortgage loans affected by such regulations.

	1.	Foreclosure.  A foreclosure of a defaulted mortgage loan 
may be delayed due to compliance with statutory notice or service of 
process provisions, difficulties in locating necessary parties or 
legal challenges to the mortgagee's right to foreclose.  Depending 
upon market conditions, the ultimate proceeds of the sale of 
foreclosed property may not equal the amounts owed on the Mortgage-
Backed Securities.

		Further, courts in some cases have imposed general 
equitable principles upon foreclosure generally designed to relieve 
the borrower form the legal effect of default and have required 
lenders to undertake affirmative and expensive actions to determine 
the causes for the default and the likelihood of loan reinstatement.

	2.	Rights of Redemption.  In some states, after foreclosure 
of a mortgage loan, the borrower and foreclosed junior lienors are 
given a statutory period in which to redeem the property, which right 
may diminish the mortgagee's ability to sell the property

	3.	Legislative Limitations.   In addition to anti-deficiency 
and related legislation, numerous other federal and state statutory 
provisions, including the federal bankruptcy laws and state laws 
affording relief to debtors, may interfere with or affect the ability 
of a secured mortgage lender to enforce its security interest.  For 
example, in a Chapter 13 proceeding under the federal Bankruptcy 
Code, when a court determines that the value of a home that is not 
the principal residence is less than the principal balance of the 
loan, the court may prevent a lender from foreclosing on the home, 
and, as part of the repayment plan, reduce the amount of the secured 
indebtedness to the value of the home as it exists at the time of the 
proceeding, leaving the lender as a general unsecured creditor for 
the difference between that value and the amount of outstanding 
indebtedness.  Certain court decisions have applied such relief to 
claims secured by the debtor's principal residence.  A bankruptcy 
court may grant court also may reduce the monthly payments due under 
such mortgage loan, change the rate of interest, reduce the principal 
balance of the loan to than-current appraised value of the related 
mortgaged property and alter the borrower's obligation to repay 
amount otherwise due on a mortgage loan, the mortgage loan servicer 
will not be required to advance such amounts, and any loss in respect 
thereof will be borne by the holders of securities backed by such 
loans.  In addition, numerous federal and state consumer protection 
laws impose penalties for failure to comply with specific 
requirements in connection with origination and servicing of mortgage 
loans.  Further, the Bankruptcy Code provides priority to certain tax 
liens over the lien of a mortgage loan.

	4.	"Due-on "Sale" Provisions.  Fixed-rate mortgage loans may 
contain a so-called "due-on-sale" clause permitting acceleration of 
the maturity of the mortgage loan if the borrower transfers the 
property.  The Garn-St. Germain Depository Institutions Act of 1982 
sets forth nine specific instances in which no mortgage lender 
covered by that Act may exercise a "due-on sale" clause or the lack 
of such a clause on mortgage loan documents may result in a mortgage 
loan being assumed by a purchaser of the property that bears an 
interest rate below the current market rate.

	5.	Usury Laws.  Some states prohibit charging interest on 
mortgage loans in excess of statutory limits.  If such limits are 
exceeded, substantial penalties may be incurred and, in some cases, 
enforceability of the obligation to pay principal and interest may be 
affected.

	Interest Rate Swaps, Mortgage Swaps, Caps and Floors.  The Fund 
may enter into interest rate and mortgage swaps and interest rate 
caps and floors for hedging purposes and not for speculation.  A Fund 
will typically use interest rate and mortgage swaps to preserve a 
return on a particular investment or portion of its portfolio or to 
shorten effective duration of its portfolio or to shorten the 
effective duration of its portfolio securities.  Interest rate swaps 
involve the exchange by a Fund with another party of their respective 
commitments to pay or receive interest, such as an exchange of fixed 
rate payments for floating rate payments.  Mortgage swaps are 
similar, pool or pools of mortgages.  The purchase of an interest on 
a specified index falls below (floor) or exceeds (cap) a 
predetermined interest rate.

	The Fund will only enter into interest rate and mortgage swaps 
on a net basis, i.e., the two payment streams are netted out, with 
the Fund receiving or paying, as the case may be, only the net amount 
of the two payments.  In as much as these transactions are entered 
into for good faith hedging purposes, the Fund and the Investment 
Adviser believe that such obligations do not constitute senior 
securities as defined in the Investment Company Act of 1940 (the 
"1940 Act") and, accordingly, will not treat them as being subject to 
the Fund's borrowing restrictions.  The net amount of the excess, if 
any, of the Fund's obligations over its entitlements with respect to 
each interest rated or mortgage swap will be accrued on a daily basis 
and an amount of cash or liquid securities rate in one of the top 
three ratings categories by Moody's Investors Service, Inc. 
("Moody's") or Standard & Poor's Corporation ("S&P"), or if unrated, 
deemed by the Investment Adviser to be of comparable quality ("High 
Grade Debt Securities") having an aggregate net asset value at least 
equal to such accrued excess will be maintained in a segregated 
account by the Fund's custodian.

   
	The Fund will not enter into any interest rate or mortgage swap 
or interest rate cap or floor transaction unless the unsecured 
commercial paper, senior debt or the claims-paying ability of the 
other party thereto is rated either AA or A-1 or Aa or P-1 or better 
by either of S&P or Moody's.  If there is a default by the other 
party to such a transaction, the Fund will have contractual remedies 
pursuant to the agreements related to the transaction.  The swap 
market has grown substantially in recent years with a large number of 
banks and investment banking firms acting both as principals and as 
agents utilizing standardized swap documentation.  As a result, the 
swap market has become relatively liquid in comparison with the 
markets for other similar instruments which are traded in the 
interbank market.  The staff of the Securities and Exchange 
Commission (the "SEC") currently takes the position that swaps, caps 
and floors are illiquid for purposes of the Fund's 15% limitation on 
illiquid investments.
    

	Privately Issued Mortgage-Related Securities.  Privately issued 
mortgage-related securities generally represent an ownership interest 
in federal agency mortgage pass-through securities, such as those 
issued by Government National Mortgage Association.  The terms and 
characteristics of the mortgage instruments may vary among pass-
through mortgage loan pools.  The market for such mortgage related 
securities has expanded considerably since its inception.  The size 
of the primary issuance market and the active participation in the 
secondary market by securities dealers an other investors make 
government-related pools highly liquid.


Additional Information on Investment Practices

	U.S. Government Obligations.  Examples of the types of U.S. 
government obligations that may be held by the Fund include, in 
addition to U.S. Treasury bills, notes and bonds, the obligations of 
the Federal Housing Administration, Farmers Home Administration, 
Export-Import Bank of the United States, Small Business 
Administration, Government National Mortgage Association, Federal 
National Mortgage Association, Federal Financing Bank, General 
Services Administration, Student Loan Marketing Association, Central 
Bank for Cooperatives, Federal Home Loan Banks, Federal Home Loan 
Mortgage Corporation, Federal Intermediate Credit Banks, Federal Land 
Banks, Federal Farm Credit Banks, Maritime Administration, Resolution 
Trust Corporation, Tennessee Valley Authority, U.S. Postal Service 
and Washington D.C. Armory Board. 

	Repurchase Agreements.  The repurchase price under the 
repurchase agreements described in the Prospectuses with respect to 
the Fund generally equals the price paid by the Fund plus interest 
negotiated on the basis of current short-term rates (which may be 
more or less than the rate on the securities underlying the 
repurchase agreement). The collateral underlying each repurchase 
agreement entered into by the Fund will consist entirely of direct 
obligations of the U.S. Government and obligations issued or 
guaranteed by U.S. government agencies or instrumentalities. 
Securities subject to repurchase agreements will be held by the 
Trust's custodian, sub-custodian or in the Federal Reserve/Treasury 
book-entry system.

	Reverse Repurchase Agreements.  The Fund may also enter into 
reverse repurchase agreements.  These transactions are similar to 
borrowing cash.  In a reverse repurchase agreement a Fund transfers 
possession of a portfolio instrument to another person, such as a 
financial institution, broker, or dealer, in return for a percentage 
of the instrument's market value in cash, and agrees that on a 
stipulated date in the future the Fund will repurchase the portfolio 
instrument by remitting the original consideration plus interest at 
an agreed upon rate.  The use of reverse repurchase agreements may 
enable a Fund to avoid selling portfolio instruments at a time when a 
sale may be deemed to be disadvantageous, but the ability to enter 
into reverse repurchase agreements does not ensure that a Fund will 
be able to avoid selling portfolio instruments at a disadvantageous 
time.  When effecting reverse repurchase agreements, liquid assets of 
a Fund, in a dollar amount sufficient to make payment for the 
obligations to be purchased, are segregated at the trade date.  These 
assets are marked to market daily and are maintained until the 
transaction is settled.

	When-Issued Transactions.  As stated in the Fund's Prospectuses, 
the Fund may purchase securities on a "when-issued" or "delayed 
delivery" basis (i.e., for delivery beyond the normal settlement date 
at a stated price and yield). When a Fund agrees to purchase 
when-issued securities, the custodian will set aside cash or liquid 
portfolio securities equal to the amount of the commitment in a 
separate account. Normally, the custodian will set aside portfolio 
securities to satisfy a purchase commitment, and in such a case that 
Fund may be required subsequently to place additional assets in the 
separate account in order to ensure that the value of the account 
remains equal to the amount of such Fund's commitment. It may be 
expected that a Fund's net assets will fluctuate to a greater degree 
when it sets aside portfolio securities to cover such purchase 
commitments than when it sets aside cash. Because the Fund will set 
aside cash or liquid assets to satisfy its purchase commitments in 
the manner described, the Fund's liquidity and ability to manage its 
portfolio might be affected in the event its commitments to purchase 
when-issued securities exceed 25% of the value of its assets. When a 
Fund engages in when-issued transactions, it relies on the seller to 
consummate the trade. Failure of the seller to do so may result in 
such Fund's incurring a loss or missing an opportunity to obtain a 
price considered to be advantageous. The Fund does not intend to 
purchase when-issued securities for speculative purposes but only in 
furtherance of their investment objectives. The Fund reserves the 
right to sell the securities before the settlement date if it is 
deemed advisable. 

	Lending of Portfolio Securities.  The Fund has the ability to 
lend securities in an amount up to one-third of the value of their 
respective total assets from their respective portfolios to brokers, 
dealers and other financial organizations. The Fund may not lend its 
portfolio securities to Lehman Brothers or its affiliates without 
specific authorization from the SEC. Loans of portfolio securities by 
the Fund will be collateralized by cash, letters of credit or 
securities issued or guaranteed by the U.S. Government or its 
agencies which will be maintained at all times in an amount equal to 
at least 100% of the current market value of the loaned securities. 
From time to time, a Fund may return a part of the interest earned 
from the investment of collateral received for securities loaned to 
the borrower and/or a third party, which is unaffiliated with the 
Fund or with Lehman Brothers, and which is acting as a "finder." With 
respect to loans by a Fund of its portfolio securities, the Fund 
would continue to accrue interest on loaned securities and would also 
earn income on loans. Any cash collateral received by a Fund in 
connection with such loans would be invested in short-term U.S. 
government obligations. 

	Options Transactions.  The Fund is authorized to engage in 
transactions involving put and call options.  The Fund may purchase a 
put option, for example, in an effort to protect the value of a 
security that it owns against a substantial decline in market value, 
if the Adviser believes that a defensive posture is warranted for a 
portion of the Fund's portfolio.  In addition, in seeking to protect 
certain portfolio securities against a decline in market value at a 
time when put options on those particular securities are not 
available for purchase, a Fund may purchase a put option on 
securities it does not hold.  Although changes in the value of the 
put option should generally offset changes in the value of the 
securities being hedged, the correlation between the two values may 
not be as close in the latter type of transaction as in a transaction 
in which the Fund purchases a put option on an underlying security it 
owns.

	The Fund may purchase call options on securities they intend to 
acquire to hedge against an anticipated market appreciation in the 
price of the underlying securities.  If the market price does rise as 
anticipated in such a situation, the Fund will benefit from that rise 
only to the extent that the rise exceeds the premiums paid.  If the 
anticipated rise does not occur or if it does not exceed the premium, 
the Fund will bear the expense of the option premiums and transaction 
costs without gaining an offsetting benefit.  A Fund's ability to 
purchase put and call options may be limited by the tax and 
regulatory requirements which apply to a regulated investment 
company.

	Futures Contracts and Options on Futures Contracts.  The Fund 
may enter into interest rate futures contracts on U.S. government 
securities, mortgage securities and Eurodollar securities.  A futures 
contract on securities, other than GNMAs which are cash settled, is 
an agreement to purchase or sell an agreed amount of securities at a 
set price for delivery on an agreed future date.  A Fund may purchase 
a futures contract as a hedge against an anticipated decline in 
interest rates, and resulting increase in market price, of securities 
the Fund intends to acquire.  A Fund may sell a futures contract as a 
hedge against an anticipated increase in interest rates, and 
resulting decline in market price, of securities the Fund owns.

	The Fund may purchase call and put options on futures contracts 
on U.S. government securities, mortgage securities and Eurodollar 
securities that are traded on U.S. commodity exchanges.  An option on 
a futures contract gives the purchaser the right, in return for the 
premium paid, to assume a position in a futures contract (a long 
position if the option is a call and short position if the option is 
a put) at a specified exercise price at any time during the option 
put exercise period.  The writer of the option is required upon 
exercise to assume an offsetting futures position (a short position 
if the option is a call and a long position if the option is a put).  
Upon the exercise of the option, the assumption of offsetting futures 
positions by the writer and holder of the option will be accompanied 
by delivery of the accumulated cash balance in the writer's futures 
margin account that represents the amount by which the market price 
of the futures contract at exercise exceeds, in the case of a call, 
or is less than, in the case of a put, the exercise price of the 
option on the futures contract.

	The Fund's ability to enter into transactions in futures 
contracts and options on futures contracts may be limited by the tax 
requirements for qualification as a regulated investment company.  
The Fund will not purchase an option if, as a result of the purchase, 
more than 20% of its total assets would be invested in premiums for 
options and options on futures.  In addition, the Fund may not sell 
futures contracts or purchase related options if immediately after 
the sale the sum of the amount of initial margin deposits on the 
Fund's existing futures and options on futures and for premiums paid 
for the related options would exceed 5% of the market value of the 
Fund's total assets, after taking into account unrealized profits and 
unrealized losses on any such contracts the Fund has entered into, 
except that, in the case of an option that is in-the-money at the 
time of purchase, the in-the-money amount may be excluded in 
computing the 5% limitation.

	The Fund will purchase put options on futures contracts 
primarily to hedge their portfolios of U.S. government securities and 
mortgage securities against the risk of rising interest rates, and 
the consequential decline in the prices of U.S. government securities 
and mortgage securities it owns.  The Fund will purchase call options 
on futures contracts to hedge the Fund's portfolio against a possible 
market advance at a time when the Fund is not fully invested in U.S. 
government securities and mortgage securities (other than U.S. 
Treasury Bills).

	In addition, the Fund may from time to time purchase Eurodollar 
instruments traded on the Chicago Mercantile Exchange.  These 
instruments are in essence U.S. dollar-denominated futures contracts 
or options on futures contracts that are linked to LIBOR.  Eurodollar 
futures contracts enable purchasers to obtain a fixed rate for the 
lending of funds and sellers to obtain a fixed rate for borrowings.  
The Fund intends to use Eurodollar futures contracts and options on 
futures contracts for hedging purposes only.  The use of these 
instruments is subject to the same limitations and risks as those 
applicable to the use of the interest rate futures contracts and 
options on futures contracts.

	Short Sales.  The Fund may make short sales of securities.  A 
short sale is a transaction in which a Fund sells a security it does 
not own in anticipation that the market price of that security will 
decline.  The Fund expects to make short sales as a form of hedging 
to offset potential declines in securities positions it holds.

	To complete a short sale, a Fund must arrange through a broker 
to borrow the securities to be delivered to the buyer.  The proceeds 
received by the Fund from the short sale are retained by the broker 
until the Fund replaces the borrowed securities.  In borrowing the 
securities to be delivered to the buyer, the Fund becomes obligated 
to replace the securities borrowed at their market price at the time 
of replacement, whatever that price may be.  The Fund may have to pay 
a premium to borrow the securities and must pay any dividends or 
interest payable on the securities until they are replaced.

	The Fund's obligation to replace the securities borrowed in 
connection with a short sale will be secured by collateral deposited 
with the broker, which collateral consists of cash or U.S. government 
securities.  In addition, the Fund will place in a segregated account 
with the Custodian an amount of cash, or U.S. government securities 
or other liquid high grade debt obligations equal to the difference, 
if any, between (a) the market value of the securities sold at the 
time they were sold short and (b) any cash or U.S. government 
securities deposited as collateral with the broker in connection with 
the short sale (not including the proceeds of the short sale).  Until 
it replaces the borrowed securities, a Fund will maintain the 
segregated account daily at a level such that the amount deposited in 
the account plus the amount deposited with the broker (not including 
the proceeds from the short sale) will equal the current market value 
of the securities sold short and will not be less than the market 
value of the securities at the time they were sold short.

	The Fund may make short sales "against the box" without 
complying with the limitations described above.  In a short sale 
against the box transaction, a Fund, at the time of the sale, owns or 
has the immediate and unconditional right to acquire at no additional 
cost the identical security sold.

	Illiquid Securities.  The Fund may not invest more than 15% of 
its respective total net assets in illiquid securities, including 
securities that are illiquid by virtue of the absence of a readily 
available market or legal or contractual restrictions on resale. 
Securities that have legal or contractual restrictions on resale but 
have a readily available market are not considered illiquid for 
purposes of this limitation.  The Adviser will monitor on an ongoing 
basis the liquidity of such restricted securities under the 
supervision of the Board of Trustees. 

	The SEC has adopted Rule 144A under the Securities Act of 1933, 
as amended (the "1933 Act") which allows for a broader institutional 
trading market for securities otherwise subject to restriction on 
resale to the general public. Rule 144A establishes a "safe harbor" 
from the registration requirements of the 1933 Act for resales of 
certain securities to qualified institutional buyers. The Fund's 
investment Adviser anticipates that the market for certain restricted 
securities such as institutional commercial paper and institutional 
municipal securities will expand further as a result of this 
regulation and the development of automated systems for the trading, 
clearance and settlement of unregistered securities of domestic and 
foreign issuers, such as the PORTAL system sponsored by the National 
Association of Securities Dealers. 

	The Adviser will monitor the liquidity of restricted securities 
under the supervision of the Board of Trustees. In reaching liquidity 
decisions with respect to Rule 144A securities, the Adviser will 
consider, inter alia, the following factors: (1) the unregistered 
nature of a Rule 144A security; (2) the frequency of trades and 
quotes for a Rule 144A security; (3) the number of dealers willing to 
purchase or sell the Rule 144A security and the number of other 
potential purchasers; (4) dealer undertakings to make a market in the 
Rule 144A security; (5) the trading markets for the Rule 144A 
security; and (6) the nature of the Rule 144A security and the nature 
of marketplace trades (including the time needed to dispose of the 
Rule 144A security, methods of soliciting offers and mechanics of 
transfer). 

	The Appendix to this Statement of Additional Information 
contains a description of the relevant rating symbols used by NRSROs 
for securities that may be purchased by the Fund. 

	Portfolio Turnover.  The Fund will not attempt to set or meet a 
portfolio turnover rate since any turnover would be incidental to 
transactions undertaken in an attempt to achieve the Fund's 
investment objective.

Investment Limitations

The Prospectuses summarize certain investment limitations that may 
not be changed without the affirmative vote of the holders of a 
majority of the Fund's outstanding shares (as defined below under 
"Miscellaneous"). Investment limitations numbered 1 through 7 may not 
be changed without such a vote of shareholders; investment 
limitations 8 through 13 may be changed by a vote of the Trust's 
Board of Trustees at any time.

	The Fund may not: 

	 1.	Purchase securities of any one issuer, other than 
obligations issued or guaranteed by the U.S. government, its agencies 
or instrumentalities, if as a result more than 5% of the value of the 
Fund's assets would be invested in the securities of such issuer, 
except that up to 25% of the value of the Fund's total assets may be 
invested without regard to such 5% limitation and (b) such 5% 
limitation shall not apply to repurchase agreements collateralized by 
obligations of the U.S. government, its agencies or 
instrumentalities. 


	 2.	Borrow money, except that the Fund may (i) borrow money 
for temporary or emergency purposes (not for leveraging or 
investment) and (ii) engage in reverse repurchase agreements or 
dollar roll transactions for any purpose; provided that (i) and (ii) 
in combination do not exceed one-third of the value of the Fund's 
total assets (including the amount borrowed) less liabilities (other 
than borrowings).  For purposes of this investment restriction, short 
sales, swap transactions, options, futures contracts and options on 
futures contracts, and forward commitment transactions shall not 
constitute borrowings.

	 3.	Make loans except that the Fund may purchase or hold debt 
obligations in accordance with its investment objective and policies, 
may enter into repurchase agreements for securities and may lend 
portfolio securities. 

	 4.	Act as an underwriter, except insofar as the Fund may be 
deemed an underwriter under applicable securities laws in selling 
portfolio securities. 

	 5.	Purchase or sell real estate or real estate limited 
partnerships except that the Fund may invest in securities secured by 
real estate or interests therein. 

	 6.	Purchase or sell commodities or commodity contracts, or 
invest in oil, gas or mineral exploration or development programs or 
in mineral leases. 

	 7.	Purchase any securities which would cause 25% or more of 
the value of its total assets at the time of purchase to be invested 
in the securities of issuers conducting their principal business 
activities in the same industry, provided that there is no limitation 
with respect to investments in U.S. government securities. 

	 8.	Knowingly invest more than 15% of the value of the Fund's 
assets in securities that may be illiquid because of legal or 
contractual restrictions on resale or securities for which there are 
no readily available market quotations. 

	 9.	Write or sell puts, calls, straddles, spreads or 
combinations thereof in excess of 5% of its total assets. 

	10.	Invest in securities if as a result the Fund would then 
have more than 5% of its total assets in securities of companies 
(including predecessors) with less than three years of continuous 
operation. 

	11.	Purchase securities of other investment companies in 
excess of 5% of its total assets, except as permitted under the 1940 
Act or in connection with a merger, consolidation, acquisition or 
reorganization. 

	12.	Invest in warrants. 

	In order to permit the sale of Fund shares in certain states, 
the Fund may make commitments more restrictive than the investment 
policies and limitations above. Should the Fund determine that any 
such commitments are no longer in its best interests, it will revoke 
the commitment by terminating sales of its shares in the state 
involved. 


ADDITIONAL PURCHASE AND REDEMPTION INFORMATION

In General

	Information on how to purchase and redeem Fund shares is 
included in the Prospectuses. The issuance of Fund shares is recorded 
on the Fund's books, and share certificates are not issued unless 
expressly requested in writing. Certificates are not issued for 
fractional shares.

	The regulations of the Comptroller of the Currency provide that 
funds held in a fiduciary capacity by a national bank approved by the 
Comptroller to exercise fiduciary powers must be invested in 
accordance with the instrument establishing the fiduciary 
relationship and local law.  The Trust believes that the purchase of 
Fund shares by such national banks acting on behalf of their 
fiduciary accounts is not contrary to applicable regulations if 
consistent with the particular account and proper under the law 
governing the administration of the account.

	Conflict of interest restrictions may apply to an institution's 
receipt of compensation paid by the Fund on fiduciary funds that are 
invested in the Fund's Select shares.  Institutions, including banks 
regulated by the Comptroller of the Currency and investment advisers 
and other money managers subject to the jurisdiction of the SEC, the 
Department of Labor or state securities commissions, should consult 
their legal advisors before investing fiduciary funds in the Fund's 
Select shares.

	Prior to effecting a redemption of shares represented by 
certificates, The Shareholder Services Group, Inc. ("TSSG"), the 
Trust's transfer agent, must receive such certificates at its 
principal office. All such certificates must be endorsed by the 
redeeming shareholder or accompanied by a signed stock power, in each 
instance with the signature guaranteed by a commercial bank, a member 
of a major stock exchange or other eligible guarantor institution, 
unless other arrangements satisfactory to the Fund have previously 
been made. The Fund may require any additional information reasonably 
necessary to evidence that a redemption has been duly authorized. 

	Under the 1940 Act, the Fund may suspend the right of redemption 
or postpone the date of payment upon redemption for any period during 
which the New York Stock Exchange is closed, other than customary 
weekend and holiday closings, or during which trading on said 
Exchange is restricted, or during which (as determined by the SEC by 
rule or regulation) an emergency exists as a result of which disposal 
or valuation of portfolio securities is not reasonably practicable, 
or for such other periods as the SEC may permit. (The Fund may also 
suspend or postpone the recordation of the transfer of its shares 
upon the occurrence of any of the foregoing conditions.)  In 
addition, the Fund may redeem shares involuntarily in certain other 
instances if the Board of Trustees determines that failure to redeem 
may have material adverse consequences to that Fund's shareholders in 
general.  The Fund is obligated to redeem shares solely in cash up to 
$250,000 or 1% of the Fund's net asset value, whichever is less, for 
any one shareholder within a 90-day period. Any redemption beyond 
this amount will also be in cash unless the Board of Trustees 
determines that conditions exist which make payment of redemption 
proceeds wholly in cash unwise or undesirable. In such a case, the 
Fund may make payment wholly or partly in readily marketable 
securities or other property, valued in the same way as the Fund 
determines net asset value. See "Net Asset Value" below for an 
example of when such redemption or form of payment might be 
appropriate. Redemption in kind is not as liquid as a cash 
redemption. Shareholders who receive a redemption in kind may incur 
transaction costs if they sell such securities or property, and may 
receive less than the redemption value of such securities or property 
upon sale, particularly where such securities are sold prior to 
maturity. 

		Any institution purchasing shares on behalf of separate 
accounts will be required to hold the shares in a single nominee name 
(a "Master Account").  Institutions investing in more than one of the 
Funds or classes must maintain a separate Master Account for each 
Fund and class of shares.  Institutions may arrange with TSSG for 
certain sub-accounting services (such as purchase, redemption and 
dividend record keeping).  Sub-accounts may be established by name or 
number either when the Master Account is opened or later.

Net Asset Value

	The Fund's net asset value per share is calculated by dividing 
the total value of the assets belonging to the Fund, less the value 
of any liabilities charged to the Fund, by the total number of the 
Fund's shares outstanding (irrespective of class or series). "Assets 
belonging to" the Fund consist of the consideration received upon the 
issuance of Fund shares together with all income, earnings, profits 
and proceeds derived from the investment thereof, including any 
proceeds from the sale, exchange or liquidation of such investments, 
any funds or payments derived from any reinvestment of such proceeds 
and a portion of any general assets of the Trust not belonging to a 
particular portfolio. Assets belonging to the Fund are charged with 
the direct liabilities of the Fund and with a share of the general 
liabilities of the Trust allocated on a daily basis in proportion to 
the relative net assets of the Fund and the Trust's other portfolios. 
Determinations made in good faith and in accordance with generally 
accepted accounting principles by the Trust's Board of Trustees as to 
the allocation of any assets or liabilities with respect to the Fund 
are conclusive. 

	As stated in the Prospectuses, portfolio securities for which 
market quotations are readily available will be valued on the basis 
of quotations provided by dealers in such securities or furnished by 
a pricing service.  Portfolio securities for which market quotations 
are not readily available and other assets will be valued at fair 
value using methods determined in good faith by the Investment 
Adviser under the supervision of the Trustees and may include yield 
equivalents or a pricing matrix.

MANAGEMENT OF THE FUND

Trustees and Officers

	The Trust's trustees and executive officers, their addresses, 
principal occupations during the past five years and other 
affiliations are as follows: 

Name and Address
Position with the 
Trust
Principal Occupations During 
Past 5 Years and Other 
Affiliations


STEVEN SPIEGEL (1)
World Financial 
Center
New York, NY 10285

Chairman of the 
Board and Trustee
Managing Director, Lehman 
Brothers; President, Lehman 
Brothers Global Asset 
Management Inc.; formerly 
Chairman, Lehman Brothers 
International (Europe)


CHARLES F. 
BARBER (2)(3)
66 Glenwood Drive
Greenwich, CT 
06830
Trustee
Consultant; Director, The 
Salomon Brothers Fund Inc., 
The Emerging Markets Income 
Fund Inc., Salomon Brothers 
High Income Fund Inc. and 
Municipal Partners Fund Inc.; 
formerly Chairman of the 
Board, ASARCO Incorporated


BURT N. 
DORSETT (2)(3)
201 East 62nd 
Street
New York, NY 10022
Trustee
Managing Partner, Dorsett 
McCabe Capital Management, 
Inc., an investment 
counseling firm; Director, 
Research Corporation 
Technologies, a non-profit 
patent-clearing and licensing 
operation; formerly 
President, Westinghouse 
Pension Investments 
Corporation; formerly 
Executive Vice President and 
Trustee, College Retirement 
Equities Fund, Inc., a 
variable annuity fund; and 
formerly Investment Officer, 
University of Rochester


EDWARD J. 
KAIER (2)(3)
1100 One Penn 
Center
Philadelphia, PA 
19103

Trustee
Partner with the law firm of 
Hepburn Willcox Hamilton & 
Putnam

S. DONALD 
WILEY (2)(3)
USX Tower
Pittsburgh, PA 
15219
Trustee
Vice Chairman and Trustee, 
H.J. Heinz Company 
Foundation; prior to October 
1990, Senior Vice President, 
General Counsel and 
Secretary, H.J. Heinz Company


PETER MEENAN
One Exchange Place
Boston, MA 02109
President
Managing Director of Lehman 
Brothers since May 1993, 
Senior Executive Vice 
President and Director of 
Institutional Funds Services, 
The Boston Company-
 Advisers, Inc., from 
February 1984 to May 1993; 
Senior Vice President, The 
Boston Company, Inc. from 
August 1984 to May 1993; 
Director, The Boston Company 
Advisers, Inc. 


JOHN M. WINTERS
World Financial 
Center
New York, NY 10285

Vice President and 
Investment Officer
Senior Vice President, Lehman 
Brothers 

VINCENT NAVE
One Boston Place
Boston, MA 02109
Treasurer
Senior Vice President, The 
Boston Company Advisers, Inc. 
and Boston Safe Deposit and 
Trust Company


FRANCIS J. 
McNAMARA, III
One Boston Place
Boston, MA 02109
Secretary
Senior Vice President and 
General Counsel, The Boston 
Company Advisers, Inc.

- --------

1.  Considered by the Trust to be an "interested person" of the Trust as 
defined in the 1940 Act.

2.  Audit Committee Member.

3.  Nominating Committee Member.

	Two of the Trust's Trustees, Messrs. Barber and Dorsett, serve 
as trustees or directors of other investment companies for which 
Lehman Brothers, the Adviser or one of their affiliates serves as 
distributor or investment adviser. 

	No employee of Lehman Brothers, LBGAM or The Boston Company 
Advisers, Inc. ("Boston Advisers") receives any compensation from the 
Trust for acting as an officer or trustee of the Trust. The Trust 
pays each trustee who is not a director, officer or employee of 
Lehman Brothers, LBGAM or Boston Advisers or any of their affiliates, 
a fee of $20,000 per annum plus $1,250 per meeting attended and 
reimburses them for travel and out-of-pocket expenses. 

	By virtue of the responsibilities assumed by Lehman Brothers, 
LBGAM, Boston Advisers and their affiliates under their respective 
agreements with the Trust, the Trust itself requires no employees in 
addition to its officers. 

Administrator

	As the Fund's administrator, Boston Advisers has agreed to 
provide the following services: (i) assist generally in supervising 
the Fund's operations, providing and supervising the operation of an 
automated data processing system to process purchase and redemption 
orders, providing information concerning the Fund to its shareholders 
of record, handling shareholder problems, supervising the services of 
employees whose principal responsibility and function is to preserve 
and strengthen shareholder relations and monitoring the arrangements 
pertaining to the Fund's agreements with Service Organizations; 
(ii) prepare reports to the Fund's shareholders and prepare tax 
returns and reports to and filings with the SEC; (iii) compute the 
respective net asset value per share of the Fund; (iv) provide the 
services of certain persons who may be elected as trustees or 
appointed as officers of the Trust by the Board of Trustees; and 
(v) maintain the registration or qualification of Fund shares for 
sale under state securities laws. 

	Prior to May 21, 1993, BGH, the parent company of TBC, Boston 
Advisors and Boston Safe Deposit and Trust Company ("Boston Safe"), 
was owned by Lehman Brothers.  In connection with the sale of BGH by 
Lehman Brothers to Mellon, Lehman Brothers and its affiliates 
conditionally agreed (with certain exceptions including one for 
certain of Lehman Brothers' current businesses) not to provide 
Custody Services, Administration Services or Master Trust Services 
(as each is defined in the agreement with Mellon) for periods of from 
one to seven years depending on the affiliate, the service and the 
client.  Thus, Lehman Brothers has agreed not to provide Custody 
Services or Administration Services to the Fund.  In addition, for 
the seven-year period commencing on May 21, 1993, Lehman Brothers has 
agreed, consistent with its fiduciary duties and assuming certain 
service quality standards are met, to continue to recommend BGH and 
its subsidiaries as the providers of such Custody Services and 
Administration Services as are currently to be provided by BGH and 
its subsidiaries to the Fund.

Distributors

	Lehman Brothers acts as a distributor of Fund shares. Funds 
Distributor, Inc. ("Funds Distributor") also serves as a distributor 
and, as such, may sell Fund shares to dealers as agent of the Fund. 
The Fund's shares are sold on a continuous basis by Lehman Brothers 
as agent, although neither distributor is obliged to sell any 
particular amount of shares. The distributors pay the cost of 
printing and distributing prospectuses to persons who are not 
shareholders of the Fund (excluding preparation and printing expenses 
necessary for the continued registration of Fund shares) and of 
preparing, printing and distributing all sales literature. No 
compensation is payable by the Fund to Lehman Brothers or Funds 
Distributor for their distribution services. 

	Lehman Brothers is comprised of several major operating business 
units. Lehman Brothers Institutional Funds Group is the business 
group within Lehman Brothers that is primarily responsible for the 
distribution and client service requirements of the Trust and its 
shareholders. Lehman Brothers Institutional Funds Group has been 
serving institutional clients' investment needs exclusively for more 
than 20 years, emphasizing high quality individualized service to 
clients. 

Plan of Distribution
   
	The Fund currently offers Institutional Shares, Select Shares 
and Premier Shares.  As stated in the Fund's Prospectuses, the Board 
of Trustees of the Trust has adopted a plan of distribution (the 
"Plan of Distribution" or "Plan") applicable to Institutional Shares, 
Select Shares and Premier Shares of the Fund pursuant to Rule 12b-1 
under the 1940 Act.
    
   
	Institutional Shares are sold to institutional investors that 
have not entered into servicing or other agreements with the Fund in 
connection with their investments and pay no Rule 12b-1 distribution 
or shareholder service fee.  However, the Plan provides that Lehman 
Brothers may make payments to assist in the distribution of 
Institutional Shares out of the other fees received by it or its 
affiliates from the Fund, its past profits or any other sources 
available to it.  Pursuant to the Plan of Distribution Select Shares 
of the Fund are sold to institutional investors and bear fees payable 
at a rate not exceeding .35% (on an annualized basis) of the average 
daily net asset value of the shares beneficially owned by such 
investors in return for certain administrative and shareholder 
services provided by Lehman Brothers or the institutional investors.  
These services may include processing purchase, exchange and 
redemption requests from customers and placing orders with the 
Transfer Agent; processing dividend and distribution payments from 
the Fund on behalf of customers; providing information periodically 
to customers showing their positions in shares; responding to 
inquiries from customers concerning their investment in shares; 
arranging for bank wires; and providing such other similar services 
as may be reasonably requested.  In addition, the Plan of 
Distribution provides that Lehman Brothers may retain all or a 
portion of the payments made to it pursuant to the Plan and may make 
payments to third parties that provide assistance in selling Select 
Shares, or to institutions that provide certain shareholder support 
services to investors.  These services may include: (i) aggregating 
and processing purchase and redemption requests from customers and 
placing net purchase and redemption orders with the Fund's 
distributor; (ii) processing dividend payments from the Fund on 
behalf of customers; (iii) providing information periodically to 
customers showing their positions in a Fund's shares; (iv) arranging 
for bank wires; (v) responding to customer inquiries relating to the 
services performed by the Institution and handling correspondence; 
(vi) forwarding shareholder communications from a Fund (such as 
proxies, shareholder reports, annual and semi-annual financial 
statements, and dividend, distribution and tax notices) to customers; 
(vii) acting as shareholder of record or nominee; and (viii) other 
similar account administrative services.  Premier Shares are offered 
by Lehman Brothers directly to individual investors.  Pursuant to the 
Plan of Distribution, the Fund has agreed to pay Lehman Brothers a 
monthly fee at an annual rate of up to .50% of the average daily net 
asset value of the Premier Shares for distribution and other services 
provided to holders of Premier Shares.  Shares of each class will 
bear all fees paid for services provided to that class under the Plan 
of Distribution.
    

	Under the Plan of Distribution, the Board of Trustees reviews, 
at least quarterly, a written report of the amounts expended under 
the Fund's Plan and the purposes for which the expenditures were 
made. In addition, the Fund's Plan must be approved annually by a 
majority of the Trust's trustees, including a majority of the 
trustees who are not "interested persons" of the Trust as defined in 
the 1940 Act and have no direct or indirect financial interest in 
such arrangements (the "Disinterested Trustees").  

	In adopting the Plan, the Board of Trustees, as required by the 
Rule, carefully considered all pertinent factors relating to the 
implementation of the Plan prior to its approval and determined that 
there is a reasonable likelihood that the arrangements will benefit 
the Fund and its shareholders by affording the Fund greater 
flexibility in connection with the servicing of the accounts of the 
beneficial owners of shares in an efficient manner.  Any material 
amendment to a Plan must be approved by a majority of the Trust's 
Board of Trustees (including a majority of the Disinterested 
Trustees). So long as the Plan is in effect, the selection and 
nomination of the members of the Trust's Board of Trustees who are 
not "interested persons" (as defined in the 1940 Act) of the Trust 
will be committed to the discretion of interested Trustees. 

Custodian and Transfer Agent

	Boston Safe Deposit and Trust Company ("Boston Safe"), a wholly-
owned subsidiary of The Boston Company, Inc., is located at One 
Boston Place, Boston, Massachusetts 02108, and serves as the 
custodian of the Trust pursuant to a custody agreement. Under the 
custody agreement, Boston Safe holds each Fund's portfolio securities 
and keeps all necessary accounts and records. For its services, 
Boston Safe receives a monthly fee based upon the month-end market 
value of securities held in custody and also receives securities 
transaction charges, including out-of-pocket expenses. The assets of 
the Trust are held under bank custodianship in compliance with the 
1940 Act. 

	The Shareholder Services Group, Inc. ("TSSG"), a subsidiary of 
First Data Corporation, is located at One Exchange Place, Boston, 
Massachusetts, and serves as the Trust's transfer agent. Under the 
transfer agency agreement, TSSG maintains the shareholder account 
records for the Trust, handles certain communications between 
shareholders and the Trust and distributes dividends and 
distributions payable by the Trust and produces statements with 
respect to account activity for the Trust and its shareholders. For 
these services, TSSG receives a monthly fee computed on the basis of 
the amount of assets under management by the Fund and is reimbursed 
for out-of-pocket expenses.

Expenses

	The Fund's expenses include taxes, interest, fees and salaries 
of the Trust's trustees and officers who are not directors, officers 
or employees of the Trust's service contractors, SEC fees, state 
securities qualification fees, costs of preparing and printing 
prospectuses for regulatory purposes and for distribution to 
shareholders, Advisory and administration fees, charges of the 
custodian and of the transfer and dividend disbursing agent, 12b-1 
fees, certain insurance premiums, outside auditing and legal 
expenses, costs of shareholder reports and shareholder meetings and 
any extraordinary expenses. The Fund also pays for brokerage fees and 
commissions (if any) in connection with the purchase and sale of 
portfolio securities. LBGAM and Boston Advisers have agreed that if, 
in any fiscal year, the expenses borne by the Fund exceed the 
applicable expense limitations imposed by the securities regulations 
of any state in which shares of that Fund are registered or qualified 
for sale to the public, they will reimburse the Fund for any excess 
to the extent required by such regulations. Unless otherwise required 
by law, such reimbursement would be accrued and paid on the same 
basis that the Advisory and administration fees are accrued and paid 
by the Fund. To the Fund's knowledge, of the expense limitations in 
effect on the date of this Statement of Additional Information, none 
is more restrictive than two and one-half percent (21/2%) of the 
first $30 million of a Fund's average annual net assets, two percent 
(2%) of the next $70 million of the average annual net assets and one 
and one-half percent (11/2%) of the remaining average annual net 
assets. 

ADDITIONAL INFORMATION CONCERNING TAXES

The following summarizes certain additional tax considerations 
generally affecting the Fund and its shareholders that are not 
described in the Prospectuses. No attempt is made to present a 
detailed explanation of the tax treatment of the Fund or its 
shareholders or possible legislative changes, and the discussion here 
and in the Prospectuses is not intended as a substitute for careful 
tax planning. Investors should consult their tax Advisers with 
specific reference to their own tax situation. 
 
	As stated in the Prospectuses, the Fund is treated as a separate 
corporate entity under the Code and intends to qualify as a regulated 
investment company under the Code. In order to so qualify for a 
taxable year, the Fund must satisfy the distribution requirement 
described in the Prospectuses, derive at least 90% of its gross 
income for the year from certain qualifying sources, comply with 
certain diversification requirements and derive less than 30% of its 
gross income for the year from the sale or other disposition of 
securities and certain other investments held for less than three 
months. Interest (including original issue discount and, with respect 
to taxable debt securities, accrued market discount) received by a 
Fund at maturity or disposition of a security held for less than 
three months will not be treated as gross income derived from the 
sale or other disposition of such security within the meaning of the 
30% requirement. However, any other income which is attributable to 
realized market appreciation will be treated as gross income from the 
sale or other disposition of securities for this purpose. 

	A 4% nondeductible excise tax is imposed on regulated investment 
companies that fail to distribute currently an amount equal to 
specified percentages of their ordinary taxable income and capital 
gain net income (excess of capital gains over capital losses).  The 
Fund intends to make sufficient distributions or deemed distributions 
of any ordinary taxable income and any capital gain net income prior 
to the end of each calendar year to avoid liability for  this excise 
tax. 

	If for any taxable year the Fund does not qualify for tax 
treatment as a regulated investment company, all of the Fund's 
taxable income will be subject to tax at regular corporate rates 
without any deduction for distributions to Fund shareholders. In such 
event, dividend distributions to shareholders would be taxable to 
shareholders to the extent of the Fund's earnings and profits, and 
would be eligible for the dividends received deduction for 
corporations.

	The Fund will be required in certain cases to withhold and remit 
to the U.S. Treasury 31% of taxable dividends or 31% of gross 
proceeds realized upon sale paid to its shareholders who have failed 
to provide a correct tax identification number in the manner 
required, or who are subject to withholding by the Internal Revenue 
Service for failure properly to include on their return payments of 
taxable interest or dividends, or who have failed to certify to a 
Fund that they are not subject to backup withholding when required to 
do so or that they are "exempt recipients." 

	The Fund's investment in certain derivative Mortgage-Backed 
Securities and other securities issued with original issue discount 
or acquired at a market discount (if the Fund elects to include 
market discount in income on an annual basis) will cause it to 
realize income prior to the receipt of cash payments with respect to 
these securities.  In order to distribute this income and avoid a tax 
on the Fund, the Fund may be required to liquidate portfolio 
securities that it might otherwise have continued to hold.

	Although the Fund expects to qualify as a "regulated investment 
company" and to be relieved of all or substantially all federal 
income taxes, depending upon the extent of its activities in states 
and localities in which its offices are maintained, in which its 
agents or independent contractors are located or in which they are 
otherwise deemed to be conducting business, a Fund may be subject to 
the tax laws of such states or localities.  In addition, in those 
states and localities which have income tax laws, the treatment of 
the Fund and its shareholders under such laws may differ from the 
treatment under federal income tax laws.  Shareholders are advised to 
consult their tax Advisers concerning the application of state and 
local taxes. 

* * * * * * * * * * * * * * * * * * * * * * * *

	The foregoing discussion is based on federal tax laws and 
regulations which are in effect on the date of this Statement of 
Additional Information; such laws and regulations may be changed by 
legislative or administrative action. 

DIVIDENDS
   
The Fund's net investment income for dividend purposes consists of 
(i) interest accrued and discount earned on the Fund's assets, (ii) 
plus the amortization of market discount, (iii) less amortization of 
market premium on such assets, (iv) less accrued expenses directly 
attributable to the Fund, and the general expenses (e.g., legal, 
accounting and trustees' fees) of the Trust prorated to the Fund on 
the basis of its relative net assets.  Realized and unrealized gains 
and losses on portfolio securities are reflected in net asset value.  
In addition, Institutional and Select shares bear exclusively the 
expense of fees paid to Lehman Brothers or other institutions with 
respect to the relevant Class of shares. See "Management of the Fund-
Plan of Distribution".
    

ADDITIONAL PERFORMANCE INFORMATION
   
The "total return", "yields," "effective yields" and "distribution 
rates" are calculated separately for each class of shares of the 
Fund.  "Total return" for a particular class of shares represents the 
change, over specified period of time, in the value of an investment 
in the shares after reinvesting all income and capital gain 
distributions.  It is calculated by dividing that change by the 
initial investment and is expressed as a percentage.  The "yield" 
quoted in advertisements for a particular class of shares refers to 
the income generated by an investment in such shares over a specified 
period (such as a thirty-day period) identified in the advertisement.  
This income is then "annualized;" that is, the amount of income 
generated by the investment during that period is assumed to be 
generated each such period over a 52-week or one-year period and is 
shown as a percentage of the investment.  The "effective yield" is 
calculated similarly but, when annualized, the income earned by an 
investment in a particular class is assumed to be reinvested.  The 
"effective yield" will be slightly higher than the "yield" because of 
the compounding effect of this assumed reinvestment.  The 
distribution rate for a specified period is calculated by annualizing 
distributions of net investment income for such period and dividing 
this amount by the ending net asset value for such period.
    
   
	From time to time, in advertisements or in reports to 
shareholders, the performance of the Fund may be quoted and compared 
to that of other funds or accounts with similar investment objectives 
and to stock or other relevant indices. For example, the yields of 
the Fund may be compared to various independent sources, including, 
but not limited to, Lipper Analytical Services, Inc., Morningstar, 
Inc., Barron's, The Wall Street Journal, Weisenberger Investment 
Companies Service, IBC/Donoghue's Inc. Bond Fund Report, Business 
Week, Financial World, Fortune, Money and Forbes.  In addition, the 
Fund's performance as compared to certain indices and benchmark 
investments may include: (a) the Lehman Brothers Government/Corporate 
(Total) Index, (b) Lehman Brothers Government Index, (c) Merrill 
Lynch 1-3 Year Treasury Index, (d) Merrill Lynch 2-Year Treasury 
Curve Index, (e) the Salomon Brothers Treasury Yield Curve Rate of 
Return Index, (f) the Payden & Rygel 2 year Treasury Note Index, (g) 
1 through 3 year U.S. Treasury Notes, (h) constant maturity U.S. 
Treasury yield indices, (i) the Consumer Price Index, (j) the London 
Interbank Offered Rate, (k) other taxable investments such as 
certificates of deposit, money market deposit accounts, checking 
accounts, savings accounts, money market mutual funds, repurchase 
agreements, commercial paper, and (1) historical data concerning the 
performance of adjustable and fixed-rate mortgage loans.
    

	The composition of the securities in such indices and the 
characteristics of such benchmark investments are not identical to, 
and in some cases are very different from, those of the Fund's 
portfolios.  These indices and averages are generally unmanaged and 
the items included in the calculations of such indices and averages 
may not be identical to the formulas used by the Fund to calculate 
its performance figures.

	From time to time, advertisements or communications to 
shareholders may summarize the substance of information contained in 
shareholder reports (including the investment composition of the 
Fund), as well as the views of Lehman Brothers as to current market, 
economic, trade and interest rate trends, legislative, regulatory and 
monetary developments, investment strategies and related matters 
believed to be of relevance to the Fund (such as the supply and 
demand of mortgage-related securities and the relative performance of 
different types of mortgage loans and mortgage-related securities as 
affected by prepayment rates and other factors).

	The Fund may from time to time summarize the substance of 
discussions contained in shareholder reports in advertisements and 
publish the Investment Adviser's views as to markets, the rationale 
for the Fund's investments and discussions of the Fund's current 
asset allocation.

	In addition, advertisements or shareholder communications may 
include a discussion of certain attributes of the Fund such as 
average portfolio maturity or benefits to be derived by an investment 
in the Fund.  Such advertisements or communications may include 
symbols, headlines or other material which highlight or summarize the 
information discussed in more detail therein.
 
	The Fund's total return and yield figures for a class of shares 
will fluctuate, and any quotation of yield should not be considered 
as representative of the future performance of the Fund. Since total 
return and yields fluctuate, yield and total return data for the Fund 
cannot necessarily be used to compare an investment in Fund shares 
with bank deposits, savings accounts and similar investment 
alternatives which often provide an agreed or guaranteed fixed yield 
for a stated period of time. Shareholders should remember that 
performance of any investment is generally a function of the kind and 
quality of the investments held in a portfolio, portfolio maturity, 
operating expenses and market conditions.  Any fee charged by 
institutions with respect to customer accounts investing in shares of 
a Fund will not be included in total return or yield calculations; 
such fees, if charged, would reduce the actual total return and yield 
from that quoted. 

ADDITIONAL DESCRIPTION CONCERNING SHARES

	The Trust does not presently intend to hold annual meetings of 
shareholders except as required by the 1940 Act or other applicable 
law. The law under certain circumstances provides shareholders with 
the right to call for a meeting of shareholders to consider the 
removal of one or more trustees. To the extent required by law, the 
Trust will assist in shareholder communication in such matters. 

   
	Fund shares represent an equal, proportionate interest in assets 
belonging to the Fund. Each share, which has a par value of $.001, 
has no preemptive or conversion rights. When issued for payment as 
described in the Prospectuses, Fund shares will be fully paid and 
non-assessable.  As stated in the Prospectuses, holders of shares in 
the Fund will vote in the aggregate and not by class or series on all 
matters, except where otherwise required by law. (See "Management of 
the Fund-Plan of Distribution.") Further, shareholders of all of the 
Trust's portfolios will vote in the aggregate and not by portfolio 
except as otherwise required by law or when the Board of Trustees 
determines that the matter to be voted upon affects only the 
interests of the shareholders of a particular portfolio. Rule 18f-2 
under the 1940 Act provides that any matter required to be submitted 
by the provisions of such Act or applicable state law, or otherwise, 
to the holders of the outstanding securities of an investment company 
such as the Trust shall not be deemed to have been effectively acted 
upon unless approved by the holders of a majority of the outstanding 
shares of each portfolio affected by the matter. Rule 18f-2 further 
provides that a portfolio shall be deemed to be affected by a matter 
unless it is clear that the interests of each portfolio in the matter 
are identical or that the matter does not affect any interest of the 
portfolio. Under the Rule the approval of an Investment Advisory 
agreement or any change in a fundamental investment policy would be 
effectively acted upon with respect to a portfolio only if approved 
by the holders of a majority of the outstanding voting securities of 
such portfolio. However, the Rule also provides that the ratification 
of the selection of independent certified public accountants, the 
approval of principal underwriting contracts and the election of 
trustees are not subject to the separate voting requirements and may 
be effectively acted upon by shareholders of the investment company 
voting without regard to portfolio.
    

	Voting rights are not cumulative; and, accordingly, the holders 
of more than 50% of the aggregate shares of the Trust may elect all 
of the trustees. 

COUNSEL

	Willkie Farr & Gallagher, One Citicorp Center, New York, New 
York 10022, serves as counsel of the Trust and will pass upon the 
legality of the shares offered hereby. Willkie Farr & Gallagher also 
serves as counsel to Lehman Brothers. 

AUDITORS 

	Ernst & Young, 200 Clarendon Street, Boston, Massachusetts 
02116-5072 serves as independent accountants of the Trust and will 
issue reports on the statement of assets and liabilities of the Fund. 

MISCELLANEOUS

Shareholder Vote

	As used in this Statement of Additional Information and the 
Fund's Prospectuses, a "majority of the outstanding shares" of the 
Fund or of any other portfolio means the lesser of (1) 67% of shares 
(irrespective of class) or of the portfolio represented at a meeting 
at which the holders of more than 50% of the outstanding shares of 
the Fund or such portfolio are present in person or by proxy, or (2) 
more than 50% of the outstanding shares of the Fund (irrespective of 
class) or of the portfolio. 

Shareholder and Trustee Liability

	The Trust is organized as a trust under the laws of the 
Commonwealth of Massachusetts. Shareholders of such a trust may, 
under certain circumstances, be held personally liable (as if they 
were partners) for the obligations of the trust. The Declaration of 
Trust of the Trust provides that shareholders shall not be subject to 
any personal liability for the acts or obligations of the Trust and 
that every note, bond, contract, order or other undertaking made by 
the Trust shall contain a provision to the effect that the 
shareholders are not personally liable thereunder. The Declaration of 
Trust provides for indemnification out of the trust property of a 
Fund of any shareholder of the Fund held personally liable solely by 
reason of being or having been a shareholder and not because of any 
acts or omissions or some other reason. The Declaration of Trust also 
provides that the Trust shall, upon request, assume the defense of 
any claim made against any shareholder for any act or obligation of 
the Trust and satisfy any judgment thereon. Thus, the risk of a 
shareholder incurring financial loss beyond the amount invested in a 
Fund on account of shareholder liability is limited to circumstances 
in which the Fund itself would be unable to meet its obligations. 

	The Trust's Declaration of Trust provides further that no 
trustee of the Trust shall be personally liable for or on account of 
any contract, debt, tort, claim, damage, judgment or decree arising 
out of or connected with the administration or preservation of the 
trust estate or the conduct of any business of the Trust, nor shall 
any trustee be personally liable to any person for any action or 
failure to act except by reason of bad faith, willful misfeasance, 
gross negligence in performing duties, or by reason of reckless 
disregard for the obligations and duties as trustee. It also provides 
that all persons having any claim against the trustees or the Trust 
shall look solely to the trust property for payment. With the 
exceptions stated, the Declaration of Trust provides that a trustee 
is entitled to be indemnified against all liabilities and expenses 
reasonably incurred in connection with the defense or disposition of 
any proceeding in which the trustee may be involved or may be 
threatened with by reason of being or having been a trustee, and that 
the trustees have the power, but not the duty, to indemnify officers 
and employees of the Trust unless such persons would not be entitled 
to indemnification if they were in the position of trustee. 



APPENDIX

DESCRIPTION OF RATINGS


	A Standard & Poor's commercial paper rating is a current 
assessment of the likelihood of timely payment of debt having an 
original maturity of no more than 365 days. The following summarizes 
the two highest rating categories used by Standard & Poor's for 
commercial paper: 

	"A-1" - Issue's degree of safety regarding timely payment is 
strong. Those issues determined to possess extremely strong safety 
characteristics are denoted "A-1+." 

	"A-2" - Issue's capacity for timely payment is satisfactory. 
However, the relative degree of safety is not as high as for issues 
designated "A-1." 

	Moody's commercial paper ratings are opinions of the ability of 
issuers to repay punctually promissory obligations not having an 
original maturity in excess of 9 months. The following summarizes the 
two highest rating categories used by Moody's for commercial paper: 

	"Prime-1" - Issuer or related supporting institutions are 
considered to have a superior capacity for repayment of short-term 
promissory obligations. Principal repayment capacity will normally be 
evidenced by the following characteristics: leading market positions 
in well-established industries; high rates of return on funds 
employed; conservative capitalization structures with moderate 
reliance on debt and ample asset protection; broad margins in earning 
coverage of fixed financial charges and high internal cash 
generation; and well-established access to a range of financial 
markets and assured sources of alternate liquidity. 

	"Prime-2" - Issuer or related supporting institutions are 
considered to have a strong capacity for repayment of short-term 
promissory obligations. This will normally be evidenced by many of 
the characteristics cited above but to a lesser degree. Earnings 
trends and coverage ratios, while sound, will be more subject to 
variation. Capitalization characteristics, while still appropriate, 
may be more affected by external conditions. Ample alternative 
liquidity is maintained. 





LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
FORM N-1A

PART C. 	OTHER INFORMATION

Item 24.	Financial Statements and Exhibits

	(a)	Financial Statements

(1)	Included in Part A:

	None

(2)	Included in Part B:  Financial Statements for the six-months ended 
July 31, 1993 for the Prime Money Market Fund, Prime Value Money Market 
Fund, Government Obligations Money Market Fund, 100% Government 
Obligations Money Market Fund, Treasury Instruments Money Market Fund, 
Treasury Instruments Money Market Fund II, 100% Treasury Instruments 
Money Market Fund, Municipal Money Market Fund, Tax-Free Money Market 
Fund and California Municipal Money Market Fund are incorporated herein 
by reference to Post-Effective Amendment No. 2 to the Registrant's 
Registration Statement on Form N-1A filed with the Commission on August 
30, 1993.

	(b)	Exhibits:

(1)	(a)	Declaration of Trust of Registrant dated 	November 16, 1992 
is incorporated herein by 	reference to Exhibit (1) to the 
Registrant's 	Initial Registration Statement on Form N-1A 	filed 
with the Securities and Exchange 	Commission on December 28, 1992.

	(b)	Amendment No. 1 to Declaration of Trust of 	Registrant 
is incorporated herein by 	reference to Exhibit (1)(b) to Pre-
Effective 	Amendment No. 3 to the Registrant's 	Registration 
Statement on Form N-1A filed with 	the Commission on January 19, 1993.

	(c)	Designation and Establishment of Series is 	incorporated 
herein by reference to Exhibit 	(1)(c) to Pre-Effective Amendment 
No. 5 to the 	Registrant's Registration Statement on Form 	N-1A 
filed with the Commission on February 5, 	1993.
   
			(d)	Form of Certificate pertaining to Classification 
		of Shares dated February 18, 1994 is filed 		
	herein.

(2)	(a)	By-Laws of Registrant dated November 16, 1992 	are 
incorporated herein by reference to Exhibit 	(2) to the Registrant's 
Initial Registration 	Statement on Form N-1A filed with the Securities 
	and Exchange Commission on December 28, 1992.
	
	(b)	Amended By-Laws of Registrant are incorporated 	herein by 
reference to Exhibit (2)(b) to Pre-	Effective Amendment No. 3 to the 
Registrant's 	Registration Statement on Form N-1A filed with 	the 
Commission on January 19, 1993.

	(c)	Amended and Restated By-Laws of Registrant are 	incorporated 
herein by reference to Exhibit 	(2)(c) to Pre-Effective Amendment 
No. 5 to the 	Registrant's Registration Statement on Form N-1A 
	filed with the Commission on February 5, 1993.

(3)		Not Applicable

(4)		Specimen Share Certificate is incorporated 	herein by 
reference to Exhibit (4) to Pre-	Effective Amendment No. 5 to the 
Registrant's 	Registration Statement on Form N-1A filed with 	the 
Commission on February 5, 1993.

(5)	(a)	Investment Advisory Agreement between Registrant 	and 
Lehman Brothers Global Asset Management Inc. 	("LBGAM"), relating to 
each investment portfolio 	(collectively, the "Funds") of Registrant 
is 	incorporated herein by reference to Exhibit 	(5)(a) to Post-
Effective Amendment No. 1 to the 	Registrant's Registration Statement 
on Form N-1A 	filed with the Commission on June 21, 1993.

    
   
	(b)	Investment Advisory Agreement between 	Registrant and 
Lehman Brothers Global Asset 	Management Inc. ("LBGAM"), relating to the 
	Floating Rate U.S. Government Fund is filed 	herein. *
    
   
	(c)	Investment Advisory Agreement between 	Registrant and 
Lehman Brothers Global Asset 	Management Inc. ("LBGAM"), relating to the 
	Short Duration U.S. Government Fund is filed 	herein.
    

	(d)	Sub-Investment Advisory Agreement between 	Registrant 
and Shearson Lehman Advisors 	("Shearson"), relating to each investment 
	portfolio (collectively, the "Funds") of 	Registrant is 
incorporated herein by reference 		to Exhibit (5)(b) to Post-
Effective Amendment 	No. 1 to the Registrant's Registration Statement 
	on Form N-1A filed with the Commission on June 	21, 1993.

(6)	(a)	Distribution Agreement between Registrant and 	Lehman 
Brothers, a division of Shearson Lehman 	Brothers Inc. is incorporated 
herein by 	reference to Exhibit (6)(a) to Post-Effective 	Amendment 
No. 1 to the Registrant's Registration 	Statement on Form N-1A filed 
with the Commission 	on June 21, 1993.







   
*The Floating Rate U.S. Government Fund changed its name from U.S 
Government Floating Rate Fund.
    




	(b)	Distribution Agreement between Registrant and 	Funds 
Distributor Inc. is incorporated herein by 	reference to Exhibit 
(6)(b) to Post-Effective 	Amendment No. 1 to the Registrant's 
Registration 	Statement on Form N-1A filed with the Commission 
	on June 21, 1993.


(7)		Not Applicable.


(8)	(a)	Custody Agreement between Registrant and Boston 	Safe 
Deposit and Trust Company is incorporated 	herein by reference to 
Exhibit (8) to Post-	Effective Amendment No. 1 to the Registrant's 
	Registration Statement on Form N-1A filed with 	the Commission on 
June 21, 1993.
   
			(b)	Custody Agreement dated November 10, 1993 	
		between Registrant and Boston Safe Deposit and 		
	Trust Company will be filed by Amendment.

(9)	(a)	Administration Agreement between Registrant and 	The 
Boston Company Advisors, Inc. is 	incorporated herein by reference to 
Exhibit 	(9)(a) to Post-Effective Amendment No. 1 to the 
	Registrant's Registration Statement on Form N-1A 	filed with 
the Commission on June 21, 1993.

	(b)	Form of Transfer Agency Agreement and Registrar 
	Agreement dated February 1, 1993 between 	Registrant and The 
Shareholder Services Group, 	Inc. is incorporated herein by reference 
to 	Exhibit (9)(b) to Pre-Effective Amendment No. 5 	to the 
Registrant's Registration Statement on 	Form N-1A filed with the 
Commission on February 	5, 1993.

    
   
	(c)	Transfer Agency and Registrar Agreement dated 	November 10, 
1993 between Registrant and the 	Shareholder Services Group, Inc. 
will be filed 	by Amendment.

(10)	(a)	Opinion and Consent of Counsel is incorporated 	herein by 
reference to Exhibit (10)(a) to Pre-	Effective Amendment No. 5 to 
the Registrant's 	Registration Statement on Form N-1A filed with the 
	Commission on February 5, 1993.

	(b)	Opinion and Consent of Massachusetts Counsel is 
	incorporated herein by reference to Exhibit (10)(b) 	to Pre-
Effective Amendment No. 5 to the 	Registrant's Registration Statement 
on Form N-1A 	filed with the Commission on February 5, 1993.

    
   
			(c)	Opinion of Massachusetts Counsel is filed 
herein.

(11)	(a)	Consent of Independent Accountants is 	incorporated 
herein by reference to Exhibit 	(11) to Pre-Effective Amendment No. 
5 to the 	Registrant's Registration Statement on Form N-1A 	filed 
with the Commission on February 5, 1993.

    
   
				(b)	Power of Attorney is incorporated herein 
by 			reference to Exhibit (11)(b) to Post-Effective 		
	Amendment No. 3 to the Registrant's Registration 	
	Statement on Form N-1A filed with the Commission on 	
	December 21, 1993.
    
   
				(c)	Consent of Counsel is filed herein.

(12)		Not Applicable.

(13)	(a)	Purchase Agreement between Registrant and 	Shearson 
Lehman Brothers Inc. is incorporated 	herein by reference to Exhibit 
(13) to Post-	Effective Amendment No. 1 to the Registrant's 
	Registration Statement on Form N-1A filed with the 	Commission 
on June 21, 1993.

    
   
	(b)	Form of Purchase Agreement between Registrant and 	Lehman 
Brothers Inc., relating to the Floating Rate 	U.S. Government Fund is 
filed herein.
    
   
	(c)	Form of Purchase Agreement between Registrant and 	Lehman 
Brothers, Inc., relating to the Short 	Duration U.S. Government Fund 
is filed herein.
    

(14)		Not Applicable.

(15)	(a)	Form of Shareholder Services Plan pursuant to 	Rule 12b-1 
is incorporated herein by reference to 	Exhibit (15)(a) to Pre-
Effective Amendment No. 5 to 	the Registrant's Registration Statement on 
Form N-	1A filed with the Commission on February 5, 1993.

	(b)	Form of Shareholder Services Plan pursuant to 	Rule 12b-1 
for Class D Shares is incorporated 	herein by reference to Exhibit 
(15)(b) to Post-	Effective Amendment No. 1 to the Registrant's 
	Registration Statement on Form N-1A filed with the 	Commission 
on June 21, 1993.

	(c)	Form of Shareholder Servicing Agreement for 	Class B 
Shares is incorporated herein by reference 	to Exhibit (15)(b) to 
Pre-Effective Amendment No. 5 	to the Registrant's Registration 
Statement on Form 	N-1A filed with the Commission on February 5, 
1993.

	(d)	Form of Shareholder Servicing Agreement for 	Class C 
Shares is incorporated herein by 	reference 	to Exhibit (15)(c) to 
Pre-Effective Amendment No. 5 	to the Registrant's Registration 
Statement on Form 	N-1A filed with the Commission on February 5, 
1993.

	(e)	Form of Shareholder Servicing Agreement for 	Class D 
Shares is incorporated herein by reference 	to Exhibit (15)(e) to 
Post-Effective Amendment No. 	1 to the Registrant's Registration 
Statement on 	Form N-1A filed with the Commission on June 21, 
	1993.
   
	(f)	Form of Plan of Distribution for Class A Shares, 	Class 
B Shares and Class C Shares for the Floating 	Rate U.S. Government 
Fund is incorporated 	herein by reference to Exhibit (15)(f) to Post-
	Effective Amendment No.3 to the Registrant's 	Registration 
Statement on Form N-1A filed with the 	Commission on December 21, 
1993. *
    
   
	(g)	Form of Plan of Distribution for Class A Shares, 	Class 
B Shares and Class C Shares for the Short 	Duration U.S. Government 
Fund is incorporated 	herein by reference to Exhibit (15)(g) to Post-
	Effective Amendment No.3 to the Registrant's 	Registration 
Statement on Form N-1A filed with the 	Commission on December 21, 
1993. *
    
   
			(h)	Form of Shareholder Servicing Agreement for 
Class B 		Shares of the non-money market portfolios is filed 	
	herein.
    

(16)	(a)	Not Applicable.



Item 25.	Persons Controlled by or under Common Control with 		
		Registrant
   
	Registrant is controlled by its Board of Trustees.
    




















   
*Class A Shares are referred to as "Institutional Shares", Class B 
Shares are referred to as "Select Shares" and Class C Shares are 
referred to as "Premier Shares."
    


Item 26.	Number of Holders of Securities

	The following information is as of December 20, 1993:




Title of 
Class
Number of 
Record 
Holders 
(Class A 
Shares)    
Number of 
Record 
Holders 
(Class B 
Shares)    
Number of 
Record Holders 
(Class C 
Shares)    
Number of 
Record 
Holders 
(Class D 
Shares)    







Prime Money 
Market Fund
    180
   4
   1
N/A


Prime Value 
Money Market 
Fund

   111

   3

   1

4


Government 
Obligations 
Money Market 
Fund

    32

   1

   1

1


100% 
Government 
Obligations 
Money Market 
Fund

    9

   1

   1
N/A


Treasury 
Instruments 
Money Market 
Fund

    2

   2

   1
N/A


Treasury 
Instruments 
II Money 
Market Fund

    17

   11

   1
N/A


100% Treasury 
Instruments 
Money Market 
Fund

    7

   1

   1
N/A


Tax-Free 
Money Market 
Fund

    15

   1

   1
N/A


Municipal 
Money Market 
Fund

   32

   1

   1
1


California 
Municipal 
Money Market 
Fund

    6

   1

   1
N/A


New York 
Municipal 
Money Market 
Fund

    0

   0

   0
N/A





Item 27.	Indemnification

	Under Section 4.3 of Registrant's Declaration of Trust, as 
amended, any past or present Trustee or officer of Registrant (including 
persons who serve at Registrant's request as directors, officers or 
trustees of another organization in which Registrant has any interest as 
a shareholder, creditor or otherwise [hereinafter referred to as a 
"Covered Person"]) is indemnified to the fullest extent permitted by law 
against liability and all expenses reasonably incurred by him in 
connection with any action, suit or proceeding to which he may be a 
party or otherwise involved by reason of his being or having been a 
Covered Person.  This provision does not authorize indemnification when 
it is determined, in the manner specified in the Declaration of Trust, 
that such Covered Person has not acted in good faith in the reasonable 
belief that his actions were in or not opposed to the best interests of 
Registrant.  Moreover, this provision does not authorize indemnification 
when it is determined, in the manner specified in the Declaration of 
Trust, that such Covered Person would otherwise be liable to Registrant 
or its shareholders by reason of willful misfeasance, bad faith, gross 
negligence or reckless disregard of his duties.  Expenses may be paid to 
Registrant in advance of the final disposition of any action, suit or 
proceedings upon receipt of an undertaking by such Covered Person to 
repay such expenses to Registrant in the event that it is ultimately 
determined that indemnification of such expenses is not authorized under 
the Declaration of Trust and the Covered Person either provides security 
for such undertaking or insures Registrant against losses from such 
advances or the disinterested Trustees or independent legal counsel 
determines, in the manner specified in the Declaration of Trust, that 
there is reason to believe the Covered Person will be found to be 
entitled to indemnification.

	Insofar as indemnification for liability arising under the 
Securities Act of 1933, as amended (the "Securities Act"), may be 
permitted to Trustees, officers and controlling persons of Registrant 
pursuant to the foregoing provisions, or otherwise, Registrant has been 
advised that in the opinion of the Securities and Exchange Commission 
such indemnification is against public policy as expressed in the 
Securities Act and is, therefore, unenforceable.  In the event that a 
claim for indemnification against such liabilities (other than the 
payment by Registrant of expenses incurred or paid by a Trustee, officer 
or controlling person of Registrant in the successful defense of any 
action, suit or proceeding) is asserted by such Trustee, officer or 
controlling person in connection with the securities being registered, 
Registrant will, unless in the opinion of its counsel the matter has 
been settled by controlling precedent, submit to a court of appropriate 
jurisdiction the question whether such indemnification by it is against 
public policy as expressed in the Securities Act and will be governed by 
the final adjudication of such issue.

Item 28.	Business and Other Connections of Investment Adviser

	(a)	Investment Adviser

	Lehman Brothers Global Asset Management Inc. ("LBGAM"), which 
serves as investment adviser to the Registrant's portfolios, is a wholly 
owned subsidiary of Lehman Brothers Holdings Inc. ("Holdings").  All of 
the issued and outstanding common stock of Holdings (representing 92% of 
the voting stock) is held by American Express Company.  LBGAM is an 
investment adviser registered under the Investment Advisers Act of 1940 
(the "Advisers Act") and serves as investment counsel for individuals 
with substantial capital, executors, trustees and institutions.  It also 
serves as investment adviser, sub-investment adviser, administrator or 
sub-administrator to numerous investment companies.

	The list required by this Item 28 of officers and directors of 
LBGAM, together with information as to any other business profession, 
vocation or employment of a substantial nature engaged in by such 
officers and directors during the past two years, is incorporated by 
reference to Schedules A and D of Form ADV filed by LBGAM pursuant to 
the Advisers Act (SEC File No. 801-42006).

Item 29.	Principal Underwriters

	(a)	Lehman Brothers, together with Funds Distributor Inc. 
("Funds Distributor"), acts as distributor for the shares of 
Registrant's portfolios.  Lehman Brothers currently acts as distributor 
for Lehman Brothers Funds, Inc.,The USA High Yield Fund N.V., The Latin 
American Bond Fund N.V., Mexican Short-Term Investment Portfolio N.V., 
Garzarelli Sector Analysis Portfolio N.V., The Mexican Appreciation Fund 
N.V., The Mexico Premium Income Portfolio N.V., Offshore Portfolios, 
International Currency Portfolios, Lehman Brothers Series I Mortgage-
Related Securities Portfolio N.V., TBC Enhanced Tactical Asset 
Allocation Portfolio N.V., U.S. Tactical Asset Allocation Portfolio 
N.V., Short-Term World Income Portfolio (Cayman), TBC Portfolio of 
Fixed-Income Securities, U.S. Tactical Asset Allocation Portfolio 
(Cayman), Offshore Daily Dividend Fund N.V. and the Global Advisors 
Portfolio N.V. and various series of unit investment trusts.

	Funds Distributor currently acts as distributor for The Boston 
Company Fund, The Boston Company Tax-Free Municipal Funds, The Boston 
Company Investment Series, Ambassador Funds, The FSB Funds, Glenmede 
Fund, Inc. and The Glenmede Portfolios.

	(b)	Lehman Brothers is a wholly-owned subsidiary of Lehman 
Brothers Holdings Inc.  The information required by this Item 29 with 
respect to each director, officer and partner of Lehman Brothers is 
incorporated by reference to Schedule A of Form BD filed by Lehman 
Brothers pursuant to the Securities Exchange Act of 1934 (SEC File No. 
8-12324).

	Funds Distributor is registered with the Securities and Exchange 
Commission as a broker-dealer and is a member of NASD.  Funds 
Distributor is a wholly-owned subsidiary of Lehman Brothers Inc., and is 
located at One Exchange Place, Boston, Massachusetts 02109.  The 
information required by this Item 29 with respect to each director and 
officer of Funds Distributor is incorporated by reference to Schedule A 
of From BD filed by Funds Distributor pursuant to the Securities 
Exchange Act of 1934 (SEC File No. 8-20518).

	(c)	Not Applicable.

Item 30.	Location of Accounts and Records

(1)	Lehman Brothers Institutional Funds Group Trust
	One Exchange Place
	Boston, Massachusetts 02109

(2)	Lehman Brothers Global Asset Management Inc.
	American Express Tower
	World Financial Center
	New York, New York 10285

(3)	The Boston Company Advisors, Inc.
	One Boston Place
	Boston, Massachusetts 02108

(4)	Boston Safe Deposit and Trust Company
	One Boston Place
	Boston, Massachusetts 02108

(5)	The Shareholder Services Group, Inc.
	One Exchange Place
	Boston, Massachusetts 02109

Item 31.	Management Services

		Not Applicable

Item 32.	Undertakings

		Registrant hereby undertakes as follows:

	(1)	Registrant hereby undertakes to call a meeting of its 
shareholders for the purpose of voting upon the question of removal of a 
trustee or trustees of Registrant when requested in writing to do so by 
the holders of at least 10% of Registrant's outstanding shares.  
Registrant undertakes further, in connection with the meeting, to comply 
with the provisions of Section 16(c) of the Investment Company Act of 
1940, as amended, relating to communications with the shareholders of 
certain common-law trusts.

	(2)	Registrant hereby undertakes to file a Post-Effective 
Amendment, using financial statements which may not be certified, for 
the Short Duration U. S. Government Fund and Floating Rate U.S. 
Government Fund within four to six months from the effective date of 
this Post-Effective Amendment.



Exhibit Index


Exhibit
  No.  			Exhibit		                     

(1)	(d)	Form of Certificate pertaining to 			
	Classification of Shares dated February 18, 		1994.

(5)	(b)	Investment Advisory Agreement between Registrant 	and 
Lehman Brothers Global Asset Management Inc. 	("LBGAM"), relating to 
the Floating Rate U.S. 	Government Fund.

(5)	(c)	Investment Advisory Agreement between Registrant 	and 
LBGAM, relating to the Short Duration U.S. 	Government Fund.

	(10)	(c)	Opinion of Massachusetts Counsel.

		(11)	(c)	Consent of Counsel.

(13)	(b)	Form of Purchase Agreement between Registrant and 	Lehman 
Brothers Inc., relating to the Floating Rate 	U.S. Government Fund.

(13)	(c)	Form of Purchase Agreement between Registrant and 	Lehman 
Brothers, Inc., relating to the Short 	Duration U.S. Government Fund.

(15)	(h)	Form of Shareholder Servicing Agreement for Class B 	Shares 
of the non-money market portfolios.




SIGNATURES
   
		Pursuant to the requirements of the Securities Act of 1933, 
as amended, and the Investment Company Act of 1940, as amended, 
Registrant certifies that this Post-Effective Amendment No. 4 to the 
Registration Statement meets the requirements for effectiveness pursuant 
to Rule 485(b) of the Securities Act of 1933, as amended, and the 
Registrant has duly caused this Post-Effective Amendment No. 4 to the 
Registration Statement to be signed on its behalf by the undersigned, 
thereunto duly authorized, in the City of Boston, Commonwealth of 
Massachusetts on the 18th day of February, 1994.
    
							LEHMAN BROTHERS
							INSTITUTIONAL
							FUNDS GROUP TRUST

							By:  /s/  Peter Meenan
								Peter Meenan
								President
   
	Pursuant to the requirements of the Securities Act of 1933, this 
Post-Effective Amendment No. 4 to the Registration Statement of Lehman 
Brothers Institutional Funds Group Trust has been signed below by the 
following persons in the capacities and on the dates indicated.
    
   
Signature
Title
Date










*                                                     
Steven Spiegel
Chairman of the Board and 
Trustee
February 18, 1994









*                   
Trustee
February 18, 1994

Charles F. Barber











*                   
Trustee
February 18, 1994

Burt N. Dorsett











*                   
Trustee
February 18, 1994

Edward J. Kaier











*                   
Trustee
February 18, 1994

S. Donald Wiley











*                   
Vincent Nave
Treasurer (Chief Financial 
and Accounting Officer)
February 18, 1994

    

*By: /s/ Peter Meenan
	Peter Meenan
	Attorney-In-Fact




Exhibit 1(d)

LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST
(A Massachusetts Business Trust)

CERTIFICATE OF CLASSIFICATION OF SHARES


	I, Patricia L. Bickimer, do hereby certify as follows:

		(1)	That I am the duly elected Assistant Secretary of Lehman 
Brothers 	Institutional Funds Group Trust (the "Trust");

		(2)	That in such capacity I have examined the records of actions 
taken 	by the Board of Trustees of the Trust at a regular meeting of the 
Board held on 	November 10, 1993;

(3)	That the following resolutions were duly adopted at the meeting by 
	the Board of Trustees of the Trust;

	a.  Creation of Floating Rate U.S. Government Fund and Creation of Short 
	Duration U.S. Government Fund (the "New Portfolios")

	VOTED, that pursuant to Section 5.11 of the Trust's Declaration of 
Trust, an unlimited number of authorized, unissued and unclassified shares of 
beneficial interest in the Trust be, and hereby are, classified and designated 
as Class A, Class B and Class C, representing interests in each of the New 
Portfolios of the Trust; and further

	VOTED, that each share of beneficial interest in the Trust created 
pursuant to the foregoing resolutions shall have all of the preferences, 
conversions and other rights, voting powers, restrictions, limitations, 
qualifications and terms and conditions of redemption that are set forth in 
the Trust's Declaration of Trust with respect to its shares of beneficial 
interest; and further


	b.	Authorization of Documents and Other Acts

	VOTED, that the Officers of the Trust be, and each of them hereby is, 
authorized and empowered to execute, send and deliver any and all documents, 
instruments, papers and writings, including but not limited to any instrument 
to be filed with the State Secretary of the Commonwealth of Massachusetts or 
the Boston City Clerk, and to do any and all other acts, in the name of the 
Trust and on its behalf, as may be necessary or desirable in connection with 
or in furtherance of the foregoing resolutions.

(4)	That the foregoing resolutions remain in full force and effect on the 
	date thereof.


						______________________________
						Assistant Secretary


Date:	_____________, 1994

Commonwealth of Massachusetts	)
				   	)
County of Suffolk		   	)

Subscribed and sworn to
before me this ______ day 
of _____________, 1994.


___________________
Notary Public
My Commission Expires:


ifg/misc/crtcl




Exhibit 5(b)
Floating Rate U.S. Government Fund

LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST


INVESTMENT ADVISORY AGREEMENT



									December 31, 1993




Lehman Brothers Global Asset Management Inc.
New York, NY

Ladies and Gentlemen:

		Lehman Brothers Institutional Funds Group Trust (the "Trust"), a 
business trust organized under the laws of The Commonwealth of Massachusetts, 
confirms its agreement with Lehman Brothers Global Asset Management Inc. (the 
"Advisor") regarding investment advisory services to be provided by the 
Advisor to Floating Rate U.S. Government Fund (the "Fund"), a portfolio of the 
Trust.  The Advisor agrees to provide services upon the following terms and 
conditions:

	1.	Investment Description; Appointment.

		The Trust anticipates that the Fund will employ its capital by 
investing and reinvesting in investments of the kind and in accordance with 
the limitations specified in the Trust's Declaration of Trust dated November 
25, 1992, as amended from time to time (the "Declaration of Trust "), in the 
prospectus (the "Prospectus") and the statement of additional information (the 
"Statement") describing the Fund filed with the Securities and Exchange 
Commission as part of the Trust's Registration Statement on Form N-1A, as 
amended from time to time, and in the manner and to the extent as may from 
time to time be approved by the Board of Trustees of the Trust.  Copies of the 
Prospectus, the Statement and the Declaration of Trust have been or will be 
submitted to the Advisor.  The Trust desires to employ and appoints the 
Advisor to act as the Fund's investment adviser.  The Advisor accepts the 
appointment and agrees to furnish the services for the compensation set forth 
below.

	2.	Services as Investment Adviser.

		Subject to the supervision and direction of the Board of Trustees 
of the Trust, the Advisor has general oversight responsibility for the 
investment advisory services provided to the Fund and will exercise this 
responsibility in accordance with the Declaration of Trust, the Investment 
Company Act of 1940 and the Investment Advisers Act of 1940, as the same may 
from time to time be amended, and with the Fund's investment objective and 
policies as stated in the Prospectus and Statement of Additional Information 
relating to the Fund as from time to time in effect.  In connection therewith, 
the Advisor will, among other things, (a) participate in the formulation of 
the Fund's investment policies, (b) analyze economic trends affecting the 
Fund, (c) monitor the brokerage and research services (as those terms are 
defined in Section 28(e) of the Securities Act of 1934) that are provided to 
the Fund and may be considered by the Fund's sub-investment adviser in 
selecting brokers or dealers to execute particular transactions and (d) 
monitor and evaluate the services provided by the Fund's sub-investment 
adviser under its sub-investment advisory agreement, including, without 
limitation, the sub-investment advisor's adherence to the Fund's investment 
objective and policies and the Fund's investment performance.

	3.	Information Provided to the Trust.

		The Advisor will keep the Trust informed of developments 
materially affecting the Fund, and will, on its own initiative, furnish the 
Trust from time to time with whatever information the Advisor believes is 
appropriate for this purpose.

	4.	Standard of Care.

		The Advisor will exercise its best judgment in rendering the 
services described in paragraph 2 of this Agreement.  The Advisor will not be 
liable for any error of judgment or mistake of law or for any loss suffered by 
the Fund in connection with the matters to which this Agreement relates, 
except that nothing in this Agreement may be deemed to protect or purport to 
protect the Advisor against any liability to the Trust or to shareholders of 
the Fund to which the Advisor would otherwise be subject by reason of willful 
misfeasance, bad faith or gross negligence on its part in the performance of 
its duties or by reason of the Advisor's reckless disregard of its obligations 
and duties under this Agreement.

	5.	Compensation.

	(a)	In consideration of the services rendered pursuant to this 
Agreement, the Trust will pay the Advisor on the first business day of each 
month a fee for the previous month at the annual rate of .30% of the value of 
the Fund's average daily net assets.  The fee for the period from the date the 
Fund commences its investment operations to the end of the month during which 
the Fund commences its investment operations will be prorated according to the 
proportion that the period bears to the full monthly period.  Upon any 
termination of this Agreement before the end of a month, the fee for such part 
of that month will be prorated according to the proportion that the period 
bears to the full monthly period and will be payable upon the date of 
termination of this Agreement.  For the purpose of determining fees payable to 
the Advisor, the value of the Fund's net assets will be computed at the times 
and in the manner specified in the Prospectus and/or the Statement.

	(b)	The Advisor shall pay to the sub-investment advisers of the Fund 
(the "Sub-Advisor") the fees payable under the Sub-Investment Advisory 
Agreement relating to the Fund dated of even date herewith among the Trust, 
the Advisor and the Sub-Advisor.  In the event that a Sub-Investment Advisory 
Agreement is terminated, the Advisor shall be responsible for furnishing to 
the Fund the services required to be performed by the Sub-Advisor under the 
Sub-Investment Advisory Agreement or arranging for a successor sub-investment 
adviser with respect to such investments on terms and conditions acceptable to 
the Trust and subject to the requirements of the Investment Company Act of 
1940.

	6.	Expenses.

		The Advisor will bear all expenses in connection with the 
performance of its services under this Agreement.  The Fund will bear certain 
other expenses to be incurred in its operation, including, but not limited to:  
costs incurred in connection with the Trust's organization; investment 
advisory, sub-investment advisory administration and shareholder servicing 
fees; fees for necessary professional and brokerage services; fees for any 
pricing service; the costs of regulatory compliance; and the costs associated 
with maintaining the Trust's legal existence; and costs of corresponding with 
shareholders of the Fund.

	7.	Reduction of Fee.

		If in any fiscal year of the Fund, the aggregate expenses of the 
Fund (including fees pursuant to this Agreement, the Fund's Sub-Investment 
Advisory Agreement and the Trust's administration agreement relating to the 
Fund, but excluding interest, taxes, brokerage fees, fees paid by the Fund 
pursuant to the Trust's shareholder services plan and, if permitted by the 
relevant state securities commissions, extraordinary expenses) exceed the 
expense limitation of any state having jurisdiction over the Fund, the Advisor 
will reduce its fee to the Fund for that excess expense to the extent required 
by state law in the same proportion as its advisory fee bears to the Fund's 
aggregate fees for investment advice, sub-investment advice and 
administration.  A fee reduction pursuant to this paragraph 7, if any, will be 
estimated, reconciled and paid on a monthly basis.

	8.	Services to Other Companies or Accounts.

		(a)  The Trust understands that the Advisor now acts, will 
continue to act and may act in the future as investment adviser to fiduciary 
and other managed accounts, and may act in the future as investment adviser to 
other investment companies, and the Trust has no objection to the Advisor so 
acting, provided that whenever the Fund and one or more fiduciary and other 
managed accounts or other investment companies advised by the Advisor have 
available funds for investment, investments suitable and appropriate for each 
will be allocated in accordance with a formula believed by the Advisor to be 
equitable to each.  The Trust recognizes that in some cases this procedure may 
adversely affect the price paid or received by the Fund or the size of the 
position obtained or disposed of by the Fund.

		(b)  The Trust understands that the persons employed by the 
Advisor to assist in the performance of the Advisor's duties under this 
Agreement will not devote their full time to such service and nothing 
contained in this Agreement will be deemed to limit or restrict the right of 
the Advisor or any affiliate of the Advisor to engage in and devote time and 
attention to other businesses or to render services of whatever kind or 
nature.

	9.	Term of Agreement.

		(a)  This Agreement will become effective as of the date the Fund 
commences its investment operations and will continue for an initial two-year 
term and will continue thereafter so long as the continuance is specifically 
approved at least annually by (i) the Board of Trustees of the Trust or (ii) a 
vote of a "majority" (as defined in the Investment Company Act of 1940, as 
amended (the "1940 Act")) of the Fund's outstanding voting securities, 
provided that in either event the continuance is also approved by a majority 
of the Board of Trustees who are not "interested persons" (as defined in the 
1940 Act) of any party to this Agreement, by vote cast in person at a meeting 
called for the purpose of voting on the approval.

		(b)  This Agreement is terminable, without penalty, on 60 days' 
written notice, by the Board of Trustees of the Trust or by vote of holders of 
a majority of the Fund's outstanding voting securities, or upon 90 days' 
written notice, by the Advisor.

		(c)  This Agreement will terminate automatically in the event of 
its "assignment" (as defined in the 1940 Act).

	10.	Representation by the Trust.

		The Trust represents that a copy of the Declaration of Trust is on 
file with the Secretary of The Commonwealth of Massachusetts and with the 
Boston City Clerk.

	11.	Limitation of Liability.

		The Trust and the Advisor agree that the obligations of the Trust 
under this Agreement will not be binding upon any of the Trustees of the 
Trust, shareholders of the Fund, nominees, officers, employees or agents, 
whether past, present or future, of the Trust, individually, but are binding 
only upon the assets and property of the Fund, as provided in the Declaration 
of Trust.  The execution and delivery of this Agreement have been authorized 
by the Trustees of the Trust and signed by an authorized officer of the Trust, 
acting as such, and neither the authorization by the Trustees, nor the 
execution and delivery by the officer will be deemed to have been made by any 
of them individually or to impose any liability on any of them personally, but 
will bind only the assets and property of the Fund as provided in its 
Declaration of Trust .  No series of the Trust, including the Fund, will be 
liable for any claims against any other series.

*          *          *          *          *


		If the foregoing is in accordance with your understanding, kindly 
indicate your acceptance of this Agreement by signing and returning the 
enclosed copy of this Agreement.


	Very truly yours,


	LEHMAN BROTHERS INSTITUTIONAL 		FUNDS GROUP TRUST



By:  /s/  Peter Meenan
	   Name:  Peter Meenan
   Title:  President


Accepted:

LEHMAN BROTHERS GLOBAL
ASSET MANAGEMENT INC.



By:  /s/  Steven Spiegel
   Name:  Steven Spiegel
   Title:  President




Short Duration U. S. Government Fund

LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST


INVESTMENT ADVISORY AGREEMENT



									December 31, 1993



Lehman Brothers Global Asset Management Inc.
New York, NY

Ladies and Gentlemen:

		Lehman Brothers Institutional Funds Group Trust (the "Trust"), a 
business trust organized under the laws of The Commonwealth of Massachusetts, 
confirms its agreement with Lehman Brothers Global Asset Management Inc. (the 
"Advisor") regarding investment advisory services to be provided by the 
Advisor to Short Duration U. S. Government Fund (the "Fund"), a portfolio of 
the Trust.  The Advisor agrees to provide services upon the following terms 
and conditions:

	1.	Investment Description; Appointment.

		The Trust anticipates that the Fund will employ its capital by 
investing and reinvesting in investments of the kind and in accordance with 
the limitations specified in the Trust's Declaration of Trust dated November 
25, 1992, as amended from time to time (the "Declaration of Trust "), in the 
prospectus (the "Prospectus") and the statement of additional information (the 
"Statement") describing the Fund filed with the Securities and Exchange 
Commission as part of the Trust's Registration Statement on Form N-1A, as 
amended from time to time, and in the manner and to the extent as may from 
time to time be approved by the Board of Trustees of the Trust.  Copies of the 
Prospectus, the Statement and the Declaration of Trust have been or will be 
submitted to the Advisor.  The Trust desires to employ and appoints the 
Advisor to act as the Fund's investment adviser.  The Advisor accepts the 
appointment and agrees to furnish the services for the compensation set forth 
below.

	2.	Services as Investment Adviser.

		Subject to the supervision and direction of the Board of Trustees 
of the Trust, the Advisor has general oversight responsibility for the 
investment advisory services provided to the Fund and will exercise this 
responsibility in accordance with the Declaration of Trust, the Investment 
Company Act of 1940 and the Investment Advisers Act of 1940, as the same may 
from time to time be amended, and with the Fund's investment objective and 
policies as stated in the Prospectus and Statement of Additional Information 
relating to the Fund as from time to 
time in effect.  In connection therewith, the Advisor will, among other 
things, (a) participate in the formulation of the Fund's investment policies, 
(b) analyze economic trends affecting the Fund, (c) monitor the brokerage and 
research services (as those terms are defined in Section 28(e) of the 
Securities Act of 1934) that are provided to the Fund and may be considered by 
the Fund's sub-investment adviser in selecting brokers or dealers to execute 
particular transactions and (d) monitor and evaluate the services provided by 
the Fund's sub-investment adviser under its sub-investment advisory agreement, 
including, without limitation, the sub-investment advisor's adherence to the 
Fund's investment objective and policies and the Fund's investment 
performance.

	3.	Information Provided to the Trust.

		The Advisor will keep the Trust informed of developments 
materially affecting the Fund, and will, on its own initiative, furnish the 
Trust from time to time with whatever information the Advisor believes is 
appropriate for this purpose.

	4.	Standard of Care.

		The Advisor will exercise its best judgment in rendering the 
services described in paragraph 2 of this Agreement.  The Advisor will not be 
liable for any error of judgment or mistake of law or for any loss suffered by 
the Fund in connection with the matters to which this Agreement relates, 
except that nothing in this Agreement may be deemed to protect or purport to 
protect the Advisor against any liability to the Trust or to shareholders of 
the Fund to which the Advisor would otherwise be subject by reason of willful 
misfeasance, bad faith or gross negligence on its part in the performance of 
its duties or by reason of the Advisor's reckless disregard of its obligations 
and duties under this Agreement.

	5.	Compensation.

	(a)	In consideration of the services rendered pursuant to this 
Agreement, the Trust will pay the Advisor on the first business day of each 
month a fee for the previous month at the annual rate of .30% of the value of 
the Fund's average daily net assets.  The fee for the period from the date the 
Fund commences its investment operations to the end of the month during which 
the Fund commences its investment operations will be prorated according to the 
proportion that the period bears to the full monthly period.  Upon any 
termination of this Agreement before the end of a month, the fee for such part 
of that month will be prorated according to the proportion that the period 
bears to the full monthly period and will be payable upon the date of 
termination of this Agreement.  For the purpose of determining fees payable to 
the Advisor, the value of the Fund's net assets will be computed at the times 
and in the manner specified in the Prospectus and/or the Statement.

	(b)	The Advisor shall pay to the sub-investment advisers of the Fund 
(the "Sub-Advisor") the fees payable under the Sub-Investment Advisory 
Agreement relating to the Fund dated of even date herewith among the Trust, 
the Advisor and the Sub-Advisor.  In the event that a Sub-Investment Advisory 
Agreement is terminated, the Advisor shall be responsible for furnishing to 
the Fund the services required to be performed by the Sub-Advisor under the 
Sub-Investment Advisory Agreement or arranging for a successor sub-investment 
adviser with respect to such investments on terms and conditions acceptable to 
the Trust and subject to the requirements of the Investment Company Act of 
1940.

	6.	Expenses.

		The Advisor will bear all expenses in connection with the 
performance of its services under this Agreement.  The Fund will bear certain 
other expenses to be incurred in its operation, including, but not limited to:  
costs incurred in connection with the Trust's organization; investment 
advisory, sub-investment advisory administration and shareholder servicing 
fees; fees for necessary professional and brokerage services; fees for any 
pricing service; the costs of regulatory compliance; and the costs associated 
with maintaining the Trust's legal existence; and costs of corresponding with 
shareholders of the Fund.

	7.	Reduction of Fee.

		If in any fiscal year of the Fund, the aggregate expenses of the 
Fund (including fees pursuant to this Agreement, the Fund's Sub-Investment 
Advisory Agreement and the Trust's administration agreement relating to the 
Fund, but excluding interest, taxes, brokerage fees, fees paid by the Fund 
pursuant to the Trust's shareholder services plan and, if permitted by the 
relevant state securities commissions, extraordinary expenses) exceed the 
expense limitation of any state having jurisdiction over the Fund, the Advisor 
will reduce its fee to the Fund for that excess expense to the extent required 
by state law in the same proportion as its advisory fee bears to the Fund's 
aggregate fees for investment advice, sub-investment advice and 
administration.  A fee reduction pursuant to this paragraph 7, if any, will be 
estimated, reconciled and paid on a monthly basis.

	8.	Services to Other Companies or Accounts.

		(a)  The Trust understands that the Advisor now acts, will 
continue to act and may act in the future as investment adviser to fiduciary 
and other managed accounts, and may act in the future as investment adviser to 
other investment companies, and the Trust has no objection to the Advisor so 
acting, provided that whenever the Fund and one or more fiduciary and other 
managed accounts or other investment companies advised by the Advisor have 
available funds for investment, investments suitable and appropriate for each 
will be allocated in accordance with a formula believed by the Advisor to be 
equitable to each.  The Trust recognizes that in some cases this procedure may 
adversely affect the price paid or received by the Fund or the size of the 
position obtained or disposed of by the Fund.

		(b)  The Trust understands that the persons employed by the 
Advisor to assist in the performance of the Advisor's duties under this 
Agreement will not devote their full time to such service and nothing 
contained in this Agreement will be deemed to limit or restrict the right of 
the Advisor or any affiliate of the Advisor to engage in and devote time and 
attention to other businesses or to render services of whatever kind or 
nature.

	9.	Term of Agreement.

		(a)  This Agreement will become effective as of the date the Fund 
commences its investment operations and will continue for an initial two-year 
term and will continue thereafter so long as the continuance is specifically 
approved at least annually by (i) the Board of Trustees of the Trust or (ii) a 
vote of a "majority" (as defined in the Investment Company Act of 1940, as 
amended (the "1940 Act")) of the Fund's outstanding voting securities, 
provided that in either event the continuance is also approved by a majority 
of the Board of Trustees who are not "interested persons" (as defined in the 
1940 Act) of any party to this Agreement, by vote cast in person at a meeting 
called for the purpose of voting on the approval.

		(b)  This Agreement is terminable, without penalty, on 60 days' 
written notice, by the Board of Trustees of the Trust or by vote of holders of 
a majority of the Fund's outstanding voting securities, or upon 90 days' 
written notice, by the Advisor.

		(c)  This Agreement will terminate automatically in the event of 
its "assignment" (as defined in the 1940 Act).

	10.	Representation by the Trust.

		The Trust represents that a copy of the Declaration of Trust is on 
file with the Secretary of The Commonwealth of Massachusetts and with the 
Boston City Clerk.

	11.	Limitation of Liability.

		The Trust and the Advisor agree that the obligations of the Trust 
under this Agreement will not be binding upon any of the Trustees of the 
Trust, shareholders of the Fund, nominees, officers, employees or agents, 
whether past, present or future, of the Trust, individually, but are binding 
only upon the assets and property of the Fund, as provided in the Declaration 
of Trust.  The execution and delivery of this Agreement have been authorized 
by the Trustees of the Trust and signed by an authorized officer of the Trust, 
acting as such, and neither the authorization by the Trustees, nor the 
execution and delivery by the officer will be deemed to have been made by any 
of them individually or to impose any liability on any of them personally, but 
will bind only the assets and property of the Fund as provided in its 
Declaration of Trust .  No series of the Trust, including the Fund, will be 
liable for any claims against any other series.

*          *          *          *          *



		If the foregoing is in accordance with your understanding, kindly 
indicate your acceptance of this Agreement by signing and returning the 
enclosed copy of this Agreement.


	Very truly yours,


	LEHMAN BROTHERS INSTITUTIONAL 		FUNDS GROUP TRUST



By:  /s/  Peter Meenan
	   Name:  Peter Meenan
   Title:  President


Accepted:

LEHMAN BROTHERS GLOBAL
ASSET MANAGEMENT INC.



By:  /s/  Steven Spiegel
   Name:  Steven Spiegel
   Title:  President






ifg/newpros/agreem/invadvs.doc












		February 18, 1994




Lehman Brothers Institutional Funds Group Trust
American Express Tower
World Financial Center
New York, NY 10285

	Re:	Form N-1A Registration Statement
		Post-Effective Amendment No. 4
		File No. 33-55034	

Gentlemen:

	The undersigned is Vice President and Associate General Counsel of The 
Boston Company Advisors, Inc., which serves as administrator, to the 
portfolios of Lehman Brothers Institutional Funds Group Trust (the "Trust").  
In such capacity, from time to time and for certain purposes, I act as counsel 
for the Trust.  You have asked that I render my opinion with respect to the 
offer and sale of an indefinite number of shares of beneficial interest (the 
"Shares") of the Lehman Brothers Floating Rate U.S. Government Fund and the 
Lehman Brothers Short Duration U.S. Government Fund (the "Funds") of the Trust 
covered by the above-referenced Post-Effective Amendment.

	The Trust was organized as a Massachusetts business trust pursuant to a 
Declaration of Trust dated November 16, 1992 (the "Declaration of Trust"), as 
from time to time amended.  The execution and delivery of the Declaration of 
Trust took place in Boston, Massachusetts.  The Funds were established as 
separate series of the Trust pursuant to an amendment to the Trust's 
Declaration of Trust approved by at least a majority of the Trust's Trustees 
at a meeting duly called and held on January 27, 1994.

	I have examined the Trust's Declaration of Trust, its By-Laws, the 
minutes of meetings of the Board of Trustees of the Trust, the Trust's 
Prospectuses and Statement of Additional Information included as part of the 
aforementioned Post-Effective Amendment, and such other documents, records, 
and certificates as I deemed necessary for purposes of this opinion.

	Based on the foregoing, I am of the opinion that the Trust has been duly 
organized and is validly existing in accordance with the laws of The 
Commonwealth of Massachusetts and that the Shares which are the subject of 
Post-Effective Amendment No. 4 will, when sold in accordance with the terms of 
the current Prospectuses and Statement of Additional Information at the time 
of sale, be duly authorized and validly issued and fully paid and non-
assessable by the Trust.

	The Trust is an entity of the type commonly known as a "Massachusetts 
business trust."  Under Massachusetts laws, shareholders could, under certain 
circumstances, be held personally liable for the obligations of the Trust.  
However, the Trust's Declaration of Trust provides that if a shareholder of 
any series of the Trust (such as the Funds) is charged or held personally 
liable by reason of being or having been a shareholder, the shareholder shall 
be entitled out of the assets of said series to be held harmless from and 
indemnified against all loss and expense arising from such liability.  Thus, 
the risk of a shareholder incurring financial loss on account of shareholders 
liability is limited to circumstances in which that series itself would be 
unable to meet its obligations.

	I consent to the filing of this opinion with and part of the 
aforementioned Post-Effective Amendment to the Trust's Registration Statement.

		Very truly yours,


		/s/ Patricia L. Bickimer
		Patricia L. Bickimer
		Vice President and
		Associate General Counsel

PLB/kjm



Lehman Brothers Institutional Funds Group Trust
February 18, 1994
Page 2




ifg\correspond\letters\opinion.doc











									Exhibit 11 (c)





CONSENT OF COUNSEL


	We hereby consent to the use of our name and to the reference to our 
Firm under the caption "Counsel" in the Statement of Additional Information 
that is included in Post-Effective Amendment No. 4 to the Registration 
Statement on Form N-1A under the Securities Act of 1933, as amended, of Lehman 
Brothers Institutional Funds Group Trust.


								/s/  Willkie, Farr, & 
Gallagher	
								Willkie, Farr, & Gallagher


New York, NY
February 18, 1994
























								February 10, 1994



VIA FEDERAL EXPRESS

Mr. Burt M. Leibert
Willkie, Farr & Gallagher
One Citicorp Center
153 East 53rd Street
New York, NY  10022

Re:	Lehman Brothers Institutional Funds Group Trust Registration Statement

Dear Burt:

	Enclosed please find a Consent of Counsel form that will require your 
signature for the Floating Rate U.S. Government Fund and Short Duration U.S. 
Government Fund Post-Effective Amendment No. 3 that will be filed with the SEC 
on Friday, February 18, 1994. Kindly make two copies using the firm's 
letterhead and return them to me by Thursday, February 17, 1994.

	Should you have any questions, please do not hesitate to call me at 
(617) 248-3525. Thank you for your assistance.

								Very truly yours,



								Susan Wong
								Legal Product Manager


		ifg\newpros\edgar1\consent.doc




Exhibit 13(b)


PURCHASE AGREEMENT



	Lehman Brothers Institutional Funds Group Trust (the "Trust"), a 
Massachusetts business trust, and Lehman Brothers Inc. (the "Distributor"), 
hereby agree as follows:


	1.  The Trust hereby offers the Distributor and the Distributor hereby 
purchases ten shares at $1.00 per share in such classes of the Trust's 
Floating Rate U.S. Government Fund with a par value of $.001 per share (the 
"Portfolio") as determined by Distributor.  The shares are the "initial 
shares" of the Portfolio.  The Distributor hereby acknowledges receipt of a 
purchase confirmation reflecting the purchase of ten shares, and the Trust 
hereby acknowledges receipt from the Distributor of funds in the amount of $10 
in full payment for the shares.


	2.  The Distributor represents and warrants to the Trust that the shares 
are being acquired for investment purposes and not for the purpose of 
distribution.


	3.  The Distributor agrees that if it or any direct or indirect 
transferee of the shares redeems the shares prior to the fifth anniversary of 
the date that the Trust begins its investment activities, the Distributor will 
pay to the Trust an amount equal to the number resulting from multiplying the 
Trust's total unamortized organizational expenses by a fraction, the numerator 
of which is equal to the number of shares redeemed by the Distributor or such 
transferee and the denominator of which is equal to the number of shares 
outstanding as of the date of such redemption, as long as the administrative 
position of the staff of the Securities and Exchange Commission requires such 
reimbursement.


	4.  The Trust represents that a copy of its Declaration of Trust, dated 
November 25, 1992, is on file in the Office of the Secretary of the 
Commonwealth of Massachusetts.




	5.  This Agreement has been executed on behalf of the Trust by the 
undersigned officer of the Trust in his capacity as an officer of the Trust.  
The obligations of this Agreement shall be binding only upon the assets and 
property of the Portfolio and not upon the assets and property of any other 
portfolio of the Trust and shall not be binding upon any Trustee, officer or 
shareholder of a Portfolio or the Trust individually.


	IN WITNESS WHEREOF, the parties hereto have executed this Agreement as 
of the 	 day of 	, 1994.


						LEHMAN BROTHERS INSTITUTIONAL 		
					FUNDS GROUP TRUST


Attest:


____________________________		By:  _____________________________


Attest:		LEHMAN BROTHERS INC.


____________________________		By:  _____________________________






Exhibit 13(c)




PURCHASE AGREEMENT



	Lehman Brothers Institutional Funds Group Trust (the "Trust"), a 
Massachusetts business trust, and Lehman Brothers Inc. (the "Distributor"), 
hereby agree as follows:


	1.  The Trust hereby offers the Distributor and the Distributor hereby 
purchases ten shares at $1.00 per share in such classes of the Trust's Short 
Duration U.S. Government Fund with a par value of $.001 per share (the 
"Portfolio") as determined by Distributor.  The shares are the "initial 
shares" of the Portfolio.  The Distributor hereby acknowledges receipt of a 
purchase confirmation reflecting the purchase of ten shares, and the Trust 
hereby acknowledges receipt from the Distributor of funds in the amount of $10 
in full payment for the shares.


	2.  The Distributor represents and warrants to the Trust that the shares 
are being acquired for investment purposes and not for the purpose of 
distribution.


	3.  The Distributor agrees that if it or any direct or indirect 
transferee of the shares redeems the shares prior to the fifth anniversary of 
the date that the Trust begins its investment activities, the Distributor will 
pay to the Trust an amount equal to the number resulting from multiplying the 
Trust's total unamortized organizational expenses by a fraction, the numerator 
of which is equal to the number of shares redeemed by the Distributor or such 
transferee and the denominator of which is equal to the number of shares 
outstanding as of the date of such redemption, as long as the administrative 
position of the staff of the Securities and Exchange Commission requires such 
reimbursement.


	4.  The Trust represents that a copy of its Declaration of Trust, dated 
November 25, 1992, is on file in the Office of the Secretary of the 
Commonwealth of Massachusetts.




	5.  This Agreement has been executed on behalf of the Trust by the 
undersigned officer of the Trust in his capacity as an officer of the Trust.  
The obligations of this Agreement shall be binding only upon the assets and 
property of the Portfolio and not upon the assets and property of any other 
portfolio of the Trust and shall not be binding upon any Trustee, officer or 
shareholder of a Portfolio or the Trust individually.


	IN WITNESS WHEREOF, the parties hereto have executed this Agreement as 
of the 	 day of 	, 1994.


						LEHMAN BROTHERS INSTITUTIONAL 		
					FUNDS GROUP TRUST


Attest:


____________________________		By:  _____________________________


Attest:		LEHMAN BROTHERS INC.


____________________________		By:  _____________________________






ifg/newpros/edgar1/purchase.doc




Exhibit 15(h)

LEHMAN BROTHERS INSTITUTIONAL FUNDS GROUP TRUST

FORM OF
SHAREHOLDER SERVICING AGREEMENT

CLASS B SHARES


Ladies and Gentlemen:

	We wish to enter into this Shareholder Servicing Agreement ("Agreement") 
with you concerning the provision of administrative support services to your 
clients ("Customers") who may from time to time beneficially own Class B 
Shares in one or more of the non-money market portfolios (the "Funds") of 
Lehman Brothers Institutional Funds Group Trust (the "Trust").

	The terms and conditions of this Agreement are as follows:

	Section 1.  You agree to provide the following administrative support 
services to your Customers who may from time to time beneficially own Class B 
Shares:   (i) aggregating and processing purchase and redemption requests for 
Class B Shares from Customers and placing net purchase and redemption orders 
with the distributor of the Class B Shares; (ii) processing dividend payments 
from the Funds on behalf of Customers; (iii) providing information 
periodically to Customers showing their positions in Class B Shares; (iv) 
arranging for bank wires; (v) responding to Customer inquiries relating to 
their investment in Class B Shares and handling correspondence; (vi) 
forwarding shareholder communications from the Funds (such as proxies, 
shareholder reports, annual and semi-annual financial statements and dividend, 
distribution and tax notices) to Customers; (vii) acting as shareholder of 
record and nominee; (viii) arranging for the reinvestment of dividend 
payments; and (ix) providing such other similar services as the Funds may 
reasonably request to the extent that you are permitted to do so under 
applicable statutes, rules or regulations.  All services rendered hereunder by 
you shall be performed in a professional, competent and timely manner.

	Section 2.  You will perform only those activities which are consistent 
with statutes and regulations applicable to you.  You will act solely as agent 
or, upon the order of, and for the account of, your Customers.

	Section 3.  You will provide such office space and equipment, telephone 
facilities and personnel (which may be any part of the space, equipment and 
facilities currently used in your business, or any personnel employed by you) 
as may be reasonably necessary or beneficial in order to provide the 
administrative support services contemplated hereby.  

	Section 4.  Neither you nor any of your officers, employees or agents 
are authorized to make any representations concerning us or the Class B Shares 
except those contained in our then current prospectus and statement of 
additional information, as amended or supplemented from time to time, copies 
of which will be supplied by us to you, or in such supplemental literature or 
advertising as may be authorized by the Distributor or us in writing.

	Section 5.  For all purposes of this Agreement you will be deemed to be 
an independent contractor, and will have no authority to act as agent for us 
in any matter or in any respect, except as provided herein.  By your written 
acceptance of this Agreement, you agree to and do release, indemnify and hold 
us harmless from and against any and all direct or indirect liabilities or 
losses resulting from requests, directions, actions or inactions of or by you 
or your officers, employees or agents regarding your responsibilities 
hereunder or the purchase, redemption, transfer or registration of Class B 
Shares (or orders relating to the same) by or on behalf of Customers.  You and 
your employees will, upon request, be available during normal business hours 
to consult with us or our designees concerning the performance of your 
responsibilities under this Agreement.

	Section 6.  In consideration of the services and facilities provided by 
you hereunder, we will pay to you, and you will accept as full payments 
therefor, a fee as described in the applicable then current prospectus.  The 
fee rate payable to you may be prospectively increased or decreased by us, in 
our sole discretion, at any time upon notice to you.  Further, we may, in our 
discretion and without notice, suspend or withdraw the sale of Class B Shares 
of any and all Funds, including the sale of Class B Shares to you for the 
account of any Customer or Customers.  Compensation payable under this 
Agreement is subject to, among other things, the National Association of 
Securities Dealers, Inc. ("NASD") Rules of Fair Practice governing receipt by 
NASD members of shareholder servicing plan fees from registered investment 
companies (the "NASD Servicing Plan Rule"), which became effective on July 7, 
1993.  Such compensation shall only be paid for services determined to be 
permissible under the NASD Servicing Plan Rule.  

	Section 7.  You agree to provide to us at least quarterly, a written 
report of the amounts expended by you in connection with the provision of 
administrative support services hereunder and the purposes for which such 
expenditures were made.  In addition, you will furnish us or our designees 
with such information as we or they may reasonably request (including, without 
limitation, periodic certifications confirming the provision to Customers of 
the services described herein), and will otherwise cooperate with us and our 
designees (including, without limitation, any auditors or legal counsel 
designated by us), in connection with the preparation of reports to our Board 
of Trustees concerning this Agreement and the monies paid or payable by us 
pursuant hereto, as well as any other reports or filings that may be required 
by law.  

	Section 8.  We may enter into other similar Agreements with any other 
person or persons without your consent.

	Section 9.  By your written acceptance of this Agreement, you represent, 
warrant and agree that:  (i) in no event will any of the services provided by 
you hereunder be primarily intended to result in the sale of any shares issued 
by us; (ii) the compensation payable to you hereunder, together with any other 
compensation you receive in connection with the investment of your Customers' 
assets in Class B Shares of the Funds, will be disclosed by you to your 
Customers to the extent required by applicable laws or regulations, will be 
authorized by your Customers and will not result in an excessive or 
unreasonable fee to you and (iii) in the event an issue pertaining to this 
Agreement is submitted for shareholder approval, and you have the authority 
for your Customer to do so, you will vote any Class B Shares held for your own 
account in the same proportion as the vote of the Class B Shares held for your 
Customers' benefit.  

	Section 10.  You agree to conform to compliance standards adopted by the 
Trustor its distributor as to when a class of shares in a Fund may be 
appropriately sold to particular investors.

	Section 11.  This Agreement will become effective on the date a fully 
executed copy of this Agreement is received by us or our designee and 
continues in effect until terminated.  This Agreement is terminable with 
respect to any series of Class B Shares, without penalty, at any time by us 
(which termination may be by a vote of a majority of the disinterested 
Trustees of the Trust) or by you upon written notice to the other party 
hereto.

	Section 12.  All notices and other communications to either you or us 
will be duly given if mailed, telegraphed, telexed or transmitted by similar 
telecommunications device to the appropriate address or number stated herein 
(with a confirming copy by mail), or to such other address as either party 
shall so provide in writing to the other.

	Section 13.  This Agreement will be construed in accordance with the 
internal laws of The Commonwealth of Massachusetts without giving effect to 
principles of conflict of laws, and is nonassignable by the parties hereto.

	If you agree to be legally bound by the provisions of this Agreement, 
please sign a copy of this letter where indicated below and promptly return it 
to us, at the following address:  One Exchange Place, Boston, Massachusetts, 
02109; fax number (617) 248-3473; Attention: Ms. Patricia L. Bickimer.


		Very truly yours,

		LEHMAN BROTHERS INSTITUTIONAL FUNDS 			GROUP TRUST


Date: ___________________	By: _________________________________

		Name: ______________________________

		Title: ________________________________

		Accepted and Agreed to:
		Servicing Agent
		_____________________________________
		(Firm Name)
		_____________________________________
		(Address)
		_____________________________________
		(City)      (State) 

		Fax # _______________________________

		Attention: ___________________________

Date: ___________________	By: _________________________________

		Name: ______________________________

		Title: _______________________________


 	Services may be modified or omitted in the particular case and items
  relettered or renumbered.

4
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