SEQUOIA MORTGAGE FUNDING CORP
424B5, 1997-07-28
ASSET-BACKED SECURITIES
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<PAGE>   1
                                                Filed Pursuant to Rule 424(b)(5)
                                                Registration No. 333-22681
PROSPECTUS SUPPLEMENT                           
(TO PROSPECTUS DATED JULY 25, 1997)
                                  $534,347,000
 
                            SEQUOIA MORTGAGE TRUST 1
                         COLLATERALIZED MORTGAGE BONDS
                            ------------------------
 
     Sequoia Mortgage Trust 1 (the "Issuer") will issue two classes of
Collateralized Mortgage Bonds (the "Bonds"), the Class A-1 and Class A-2 Bonds,
each of which is being offered hereby. Interest on each Class of Bonds will be
payable monthly on the 4th day of each month, or if such day is not a business
day, the next succeeding business day (each, a "Payment Date"), commencing on
August 4, 1997. See "DESCRIPTION OF THE BONDS -- Interest" herein. Payments of
principal of each Class of Bonds on each Payment Date will be made in the manner
described herein under "DESCRIPTION OF THE BONDS -- Principal." The Bonds are
redeemable only under the circumstances described herein.
 
     The Issuer is a Delaware business trust established by Sequoia Mortgage
Funding Corporation (the "Company"), a wholly owned subsidiary of Redwood Trust,
Inc., a Maryland corporation ("Redwood Trust"). Prior to their sale to the
Issuer by the Company, the Pledged Mortgages will be held by Redwood Trust. The
Bonds represent limited obligations of the Issuer payable solely from the
collateral and are not insured or guaranteed by any government agency or
instrumentality, the Company, Redwood Trust, the Master Servicer, the Insurer
(except as set forth herein) or any other person or entity. Payments on the
Bonds will be payable solely from the Pledged Mortgages and other collateral
pledged to secure the Bonds and the Bond Insurance Policy. None of the Company,
Redwood Trust or the Master Servicer has guaranteed or is otherwise obligated
with respect to payment of the Bonds and no person or entity other than the
Issuer is obligated to pay the Bonds, except as specifically set forth herein
with regard to the Bond Insurance Policy. The Issuer is not expected to have any
significant assets other than those pledged as collateral to secure the Bonds.
 
     The Bonds will be unconditionally and irrevocably guaranteed as to payment
of Insured Payments (as defined herein) pursuant to the terms of the financial
guaranty insurance policy (the "Bond Insurance Policy") to be issued by
 
                                      MBIA
                            ------------------------
 
FOR A DISCUSSION OF CERTAIN RISK FACTORS RELATING TO INVESTMENTS IN THE BONDS,
SEE "RISK FACTORS" COMMENCING ON PAGE S-13 OF THIS PROSPECTUS SUPPLEMENT AND ON
PAGE 19 OF THE PROSPECTUS.
                            ------------------------
 
  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 SUPPLEMENT OR THE PROSPECTUS. ANY
             REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
 
<TABLE>
<S>                                             <C>               <C>               <C>
=====================================================================================================
                                                    Original
                                                    Principal       Bond Interest        Stated
                                                     Amount             Rate           Maturity(1)
- -----------------------------------------------------------------------------------------------------
Class A-1......................................   $334,347,000           (2)           May 4, 2029
- -----------------------------------------------------------------------------------------------------
Class A-2......................................   $200,000,000           (2)           May 4, 2029
=====================================================================================================
</TABLE>
 
(1) Calculated as described herein under "DESCRIPTION OF THE BONDS -- Stated
    Maturity."
 
(2) Each Class of Bonds shall bear interest at a variable rate which shall be
    based, to the extent described herein, on one-month LIBOR for the Class A-1
    Bonds and the Fed Funds Average Rate for the Class A-2 Bonds (each, as
    defined herein). See "SUMMARY -- Bond Interest Rate" herein.
                            ------------------------
 
     The Bonds will be purchased by Lehman Brothers Inc. (the "Underwriter")
from the Issuer and will be offered by the Underwriter from time to time in
negotiated transactions or otherwise at varying prices to be determined at the
time of sale. Proceeds to the Issuer from the sale of the Bonds are expected to
be approximately 99.8125% of the aggregate principal amount of the Bonds, before
deducting issuance expenses payable by the Issuer.
 
     The Bonds are offered by the Underwriter, subject to prior sale, when, as
and if delivered to and accepted by the Underwriter and subject to its right to
reject orders in whole or in part. It is expected that delivery of the Bonds
will be made in book-entry form only through the facilities of The Depository
Trust Company, CEDEL and Euroclear on or about July 29, 1997.
                            ------------------------
 
                                LEHMAN BROTHERS
July 25, 1997
<PAGE>   2
 
(Cover continued from previous page)
 
    The Bonds will be collateralized by adjustable-rate, conventional, primarily
30-year mortgage loans secured by first liens on one- to four-family residential
properties (the "Pledged Mortgages"). The Bonds also will be secured by the Bond
Account and the Distribution Account described herein.
 
    THE YIELD TO INVESTORS IN THE BONDS WILL BE SENSITIVE IN VARYING DEGREES TO,
AMONG OTHER THINGS, THE RATE AND TIMING OF PRINCIPAL PAYMENTS (INCLUDING
PREPAYMENTS) OF THE PLEDGED MORTGAGES AND THE LEVEL OF LIBOR, IN THE CASE OF THE
CLASS A-1 BONDS, AND THE FED FUNDS RATE, IN THE CASE OF THE CLASS A-2 BONDS,
EACH OF WHICH MAY VARY SIGNIFICANTLY OVER TIME. THE YIELD TO MATURITY OF BONDS
PURCHASED AT A DISCOUNT OR PREMIUM WILL BE MORE SENSITIVE TO THE RATE AND TIMING
OF PAYMENTS THEREON. HOLDERS OF THE BONDS SHOULD CONSIDER, IN THE CASE OF ANY
SUCH BONDS PURCHASED AT A DISCOUNT, THE RISK THAT A SLOWER THAN ANTICIPATED RATE
OF PRINCIPAL PAYMENTS COULD RESULT IN AN ACTUAL YIELD THAT IS LOWER THAN THE
ANTICIPATED YIELD AND, IN THE CASE OF ANY BONDS PURCHASED AT A PREMIUM, THE RISK
THAT A FASTER THAN ANTICIPATED RATE OF PRINCIPAL PAYMENTS COULD RESULT IN AN
ACTUAL YIELD THAT IS LOWER THAN THE ANTICIPATED YIELD. THE YIELD TO INVESTORS IN
THE BONDS ALSO MAY BE ADVERSELY AFFECTED BY REALIZED LOSSES (AS DEFINED HEREIN).
NO REPRESENTATION IS MADE AS TO THE ANTICIPATED RATE OF PREPAYMENTS ON THE
PLEDGED MORTGAGES, THE AMOUNT AND TIMING OF REALIZED LOSSES, OR AS TO THE
RESULTING YIELD TO MATURITY OF THE BONDS.
 
    The Underwriter intends to make a secondary market in the Bonds, but has no
obligation to do so. There is currently no secondary market for the Bonds and
there can be no assurance that such a market will develop or, if it does
develop, that it will continue or that it will provide Bondholders with a
sufficient level of liquidity of investment. The Bonds will not be listed on any
national securities exchange.
                            ------------------------
 
    This Prospectus Supplement does not contain complete information about the
offering of the Bonds. Additional information is contained in the Prospectus of
the Company dated July 25, 1997 and purchasers are urged to read both this
Prospectus Supplement and the Prospectus in full. Sales of the Bonds may not be
consummated unless the purchaser has received both this Prospectus Supplement
and the Prospectus.
                            ------------------------
 
                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE
 
In addition to the documents described under "INCORPORATION OF CERTAIN DOCUMENTS
BY REFERENCE" in the Prospectus, the financial statements included in, or as
exhibits to the following documents which have been filed with the Securities
and Exchange Commission by MBIA Inc., are hereby incorporated by reference in
this Prospectus Supplement:
 
    (a) The consolidated financial statements of the Insurer and its
        subsidiaries as of December 31, 1996 and December 31, 1995 and for each
        of the three years in the period ended December 31, 1996 included in the
        Annual Report on Form 10-K of MBIA Inc. for the year ended December 31,
        1996; and
 
    (b) The consolidated financial statements of the Insurer and its
        subsidiaries as of March 31, 1997 and for each of the three month
        periods ending March 31, 1997 and March 31, 1996 included in the
        Quarterly Report on Form 10-Q of MBIA Inc. for the period ended March
        31, 1997.
 
    All financial statements included in documents filed by MBIA Inc. and its
subsidiaries pursuant to Section 13(a), 13(c), 14 or 15(d) of the Securities
Exchange Act of 1934, as amended (the "Exchange Act"), subsequent to the date of
this Prospectus Supplement and prior to the termination of the offering of the
Bonds shall be deemed to be incorporated by reference into this Prospectus
Supplement and to be a part hereof from the respective dates of filing such
documents.
 
    The Company hereby undertakes that, for purposes of determining any
liability under the Securities Act of 1933, as amended, each filing of the
financial statements of the Insurer and its subsidiaries included in or as an
exhibit to the documents of MBIA Inc. referred to above and filed pursuant to
Section 13(a), 13(c), 14 or Section 15(d) of the Exchange Act that is
incorporated by reference in the Registration Statement of which this Prospectus
Supplement and the accompanying Prospectus is a part shall be deemed to be a new
registration statement relating to the Bonds offered hereby, and the offering of
such Bonds at that time shall be deemed to be the initial bona fide offering
thereof.
 
    The Company will provide without charge to each person to whom this
Prospectus Supplement is delivered, on the written or oral request of such
person, a copy of any or all of the documents referred to above and in the
Prospectus under "INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE" that have
been or may be incorporated by reference in the Prospectus (not including
exhibits to the information that is incorporated by reference unless such
exhibits are specifically incorporated by reference into the information that
the Prospectus incorporates). Such requests should be directed to the Company at
591 Redwood Highway, Suite 3120, Mill Valley, CA 94941, telephone: (415)
381-1765, facsimile number: (415) 381-1773, Attention: Sequoia Mortgage Trust 1
Officer.
 
                                       S-2
<PAGE>   3
 
                                    SUMMARY
 
The following summary is qualified in its entirety by reference to the detailed
information appearing elsewhere in this Prospectus Supplement and in the
accompanying Prospectus. Certain capitalized terms used in this Summary are
defined elsewhere in this Prospectus Supplement or in the Prospectus. See "INDEX
OF CERTAIN DEFINITIONS" on page S-53 of this Prospectus Supplement and page 85
of the Prospectus for the location of the definitions of certain capitalized
terms.
 
Bonds......................  Sequoia Mortgage Trust 1, Collateralized Mortgage
                             Bonds, (the "Bonds"). The Bonds will consist of the
                             following Classes:
 
<TABLE>
<CAPTION>
                                               CLASS                     ORIGINAL PRINCIPAL AMOUNT
                              ---------------------------------------    -------------------------
                              <S>                                        <C>
                              Class A-1 Bonds........................          $ 334,347,000
                              Class A-2 Bonds........................          $ 200,000,000
</TABLE>
 
                             The Bonds will constitute "Book-Entry Bonds" as
                             such term is used in the Prospectus.
 
Issuer.....................  The Issuer, Sequoia Mortgage Trust 1, is a
                             statutory business trust established under the laws
                             of the State of Delaware by the Deposit Trust
                             Agreement (as defined herein) for the sole purpose
                             of issuing the Bonds and the Investor Certificate.
                             The settlor and sole beneficiary of the Issuer is
                             Sequoia Mortgage Funding Corporation, a Delaware
                             corporation (the "Company"), and a wholly owned
                             subsidiary of Redwood Trust, Inc., a Maryland
                             corporation ("Redwood Trust"). The Owner Trustee of
                             the Issuer is Wilmington Trust Company. Redwood
                             Trust will be the manager of the Issuer pursuant to
                             a management agreement (the "Management Agreement")
                             entered into with the Issuer. None of the Company,
                             Redwood Trust or the Master Servicer has guaranteed
                             or is otherwise obligated with respect to payment
                             of the Bonds, and no person or entity other than
                             the Issuer is obligated to pay the Bonds, except as
                             specifically set forth herein with regard to the
                             Bond Insurance Policy. See "THE ISSUER" herein and
                             in the Prospectus.
 
Bond Trustee...............  First Union National Bank, a national banking
                             association (the "Bond Trustee").
 
Owner Trustee..............  Wilmington Trust Company, a banking corporation
                             organized under the laws of the State of Delaware
                             (the "Owner Trustee").
 
Servicing Agreements.......  Prior to the Closing Date, Redwood Trust entered
                             into mortgage servicing agreements (each, a
                             "Servicing Agreement") with certain servicers
                             (each, a "Servicer") pursuant to which each
                             Servicer has agreed to perform certain servicing
                             functions with respect to the Pledged Mortgages.
                             See "SERVICING OF THE PLEDGED MORTGAGES" herein.
 
                             On or prior to the Closing Date, Redwood Trust will
                             assign all of its right, title and interest in the
                             Servicing Agreements to the Company which will in
                             turn assign all of its rights thereunder to the
                             Issuer which will in turn assign its rights
                             thereunder to the Bond Trustee pursuant to the
                             Indenture. See "SERVICING OF THE PLEDGED MORTGAGES"
                             herein.
 
Master Servicing
  Agreement................  The Pledged Mortgages will be master serviced
                             pursuant to a master servicing agreement dated as
                             of June 1, 1997 (the "Master Servicing
 
                                       S-3
<PAGE>   4
 
                             Agreement") among the Issuer, the Bond Trustee and
                             the Master Servicer.
 
Master Servicer............  Norwest Bank Minnesota, N.A. will act as Master
                             Servicer for the Pledged Mortgages (the "Master
                             Servicer"). The Master Servicer's obligations under
                             the Master Servicing Agreement will principally be
                             limited to (i) performing Bond administrative
                             functions, (ii) supervising the performance of each
                             Servicer to the limited extent provided in the
                             Master Servicing Agreement and (iii) succeeding to
                             the obligations of a terminated Servicer under the
                             related Servicing Agreement or appointing a
                             successor Servicer. See "SERVICING OF THE PLEDGED
                             MORTGAGES" herein.
 
Deposit Trust Agreement....  The Issuer has been established and the Investor
                             Certificate will be issued pursuant to an amended
                             and restated deposit trust agreement dated as of
                             July 17, 1997 (the "Deposit Trust Agreement") among
                             the Company and the Owner Trustee.
 
Indenture..................  The Bonds will be issued pursuant to an indenture
                             dated as of June 1, 1997 (the "Indenture") among
                             the Issuer and First Union National Bank, as
                             trustee (the "Bond Trustee").
 
Investor Certificate.......  The Investor Certificate will represent the entire
                             beneficial ownership interest in the Issuer. The
                             Investor Certificate will initially be retained by
                             the Company and will generally evidence the right
                             to distributions on and other proceeds of the
                             Pledged Mortgages, to the extent not used to pay
                             the Bonds or other expenses of the Issuer. See
                             "DESCRIPTION OF THE BONDS -- Investor Certificate
                             Payment" herein. Only the Bonds are offered hereby.
                             Any information contained herein with respect to
                             the Investor Certificate is provided only to permit
                             a better understanding of the Bonds.
 
Cut-off Date...............  June 1, 1997.
 
Closing Date...............  On or about July 29, 1997.
 
Payment Date...............  The 4th day of each month or, if such day is not a
                             business day, the first business day thereafter,
                             commencing in August 1997 (each, a "Payment Date").
                             Payments on each Payment Date will be made to
                             Bondholders of record as of the related Record
                             Date, except that the final payment on the Bonds
                             will be made only upon presentment and surrender of
                             the Bonds at the Corporate Trust Office of the Bond
                             Trustee.
 
Record Date................  The Record Date for any Payment Date will be the
                             last day of the month preceding the month of such
                             Payment Date (or in the case of the first Payment
                             Date, the Closing Date).
 
Payments of Interest.......  On each Payment Date, the Bondholders will be
                             entitled to receive interest in the amount of the
                             Interest Payment Amount for such Payment Date. See
                             "DESCRIPTION OF THE BONDS -- Interest" herein and
                             "DESCRIPTION OF THE BONDS -- Payments of Interest"
                             in the Prospectus.
 
 A. Interest Payment
      Amount...............  Interest on each Class of Bonds will be payable
                             monthly on each Payment Date in an amount (the
                             "Interest Payment Amount") equal to interest
                             accrued on the then outstanding Principal Balance
                             for such Class immediately prior to such Payment
                             Date at the related Bond Interest Rate for the
                             related Interest Accrual Period.
 
                                       S-4
<PAGE>   5
 
                             The "Interest Accrual Period" will be the period
                             commencing on the immediately preceding Payment
                             Date (or, in the case of the first Interest Accrual
                             Period, commencing on the Closing Date) and ending
                             on the date immediately preceding such Payment
                             Date. Interest will be calculated and payable on
                             the basis of a 360-day year divided into twelve
                             30-day months.
 
 B. Bond Interest Rate.....  The interest rate for the Class A-1 Bonds (the
                             "Class A-1 Interest Rate") on each Payment Date
                             after the first Payment Date and up to and
                             including the Payment Date on which the Issuer is
                             first permitted to exercise its option to redeem
                             the Bonds will be equal to the lesser of (i) a per
                             annum floating rate equal to LIBOR, for the related
                             Interest Accrual Period, plus 0.38% and (ii) 10%
                             per annum. If the Issuer does not exercise its
                             option to redeem the Bonds on the first Payment
                             Date on which it is permitted to do so, on the next
                             succeeding Payment Date, the Class A-1 Interest
                             Rate will increase and for the remaining term of
                             the Bonds will be equal to the lesser of (i) a per
                             annum floating rate equal to LIBOR for the related
                             Interest Accrual Period plus 0.76% and (ii) 10.38%
                             per annum. The Class A-1 Interest Rate for the
                             first Payment Date will equal 6.02844% per annum.
 
                             The interest rate for the Class A-2 Bonds (the
                             "Class A-2 Interest Rate" and together with the
                             Class A-1 Interest Rate, the "Bond Interest Rates")
                             on each Payment Date after the first Payment Date
                             and up to and including the Payment Date on which
                             the Issuer is permitted to exercise its option to
                             redeem the Bonds will be equal to the lesser of (i)
                             a per annum floating rate equal to the Fed Funds
                             Average Rate (as defined herein) for the related
                             Interest Accrual Period, plus 0.54% and (ii) 10%
                             per annum. If the Issuer does not exercise its
                             option to redeem the Bonds on the first Payment
                             Date on which it is permitted to do so, on the next
                             succeeding Payment Date, the Class A-2 Interest
                             Rate will increase and for the remaining term of
                             the Bonds will be equal to the lesser of (i) a per
                             annum floating rate equal to the Fed Funds Average
                             Rate for the related Interest Accrual Period plus
                             0.92% and (ii) 10.38% per annum. The Class A-2
                             Interest Rate for the first Payment Date will equal
                             6.04% per annum.
 
                             Notwithstanding the foregoing, the Bond Interest
                             Rate for each Class of Bonds will be subject to
                             certain additional limitations in the event that a
                             default under the Bond Insurance Policy has
                             occurred and is continuing. See "DESCRIPTION OF THE
                             BONDS -- Interest" herein. The Bond Interest Rate
                             for each Class of Bonds for each Payment Date will
                             be determined by the Master Servicer as described
                             under "DESCRIPTION OF THE
                             BONDS -- Interest -- LIBOR Rate Determination" and
                             "-- Interest -- Fed Funds Average Rate
                             Determination" herein.
 
Payments of Principal......  On each Payment Date, to the extent funds are
                             available therefor, principal payments in reduction
                             of the then outstanding Principal Balance on each
                             Class of Bonds will be made on a pro rata basis
                             according to the outstanding Principal Balance of
                             each Class, subject to the priorities set forth
                             herein under "DESCRIPTION OF THE BONDS --
                             Principal" in an amount equal to the Principal
                             Payment Amount for such Payment Date. The Principal
                             Payment Amount is described under "DESCRIPTION OF
                             THE BONDS -- Principal" herein. The "Principal
                             Balance" of each Class of Bonds on any date of
                             determination is the
 
                                       S-5
<PAGE>   6
 
                             initial principal balance thereof as of the Closing
                             Date reduced by all payments of principal thereon
                             prior to such date of determination. The "Bond
                             Principal Balance" on any date of determination is
                             the aggregate of the Principal Balances of both
                             Classes of Bonds on such date of determination.
 
Stated Maturity............  The Stated Maturity for the Bonds is the date
                             determined by the Company which is the 25th Payment
                             Date immediately following the latest maturity date
                             of any Pledged Mortgage. The Stated Maturity for
                             the Bonds is May 4, 2029. See "DESCRIPTION OF THE
                             BONDS -- Stated Maturity" and "-- Weighted Average
                             Lives of the Bonds" herein.
 
Redemption of Bonds;
  Termination..............  The Bonds may be redeemed in whole, but not in
                             part, at the Issuer's option, on any Payment Date
                             after the earlier of (a) seven years after the
                             Closing Date and (b) the Payment Date after which
                             the Pool Principal Balance with respect to such
                             Payment Date is 35% or less of the Initial Pool
                             Principal Balance (each, as defined below), at a
                             redemption price equal to 100% of the unpaid Bond
                             Principal Balance, plus accrued and unpaid interest
                             thereon at the Bond Interest Rate for each such
                             Class of Bonds, plus all amounts due to the Insurer
                             pursuant to the Insurance Agreement (the
                             "Redemption Price"). If the Issuer does not
                             exercise its option to redeem the Bonds on the
                             first Payment Date on which it is permitted to do
                             so, on the next succeeding Payment Date, (a) the
                             Class A-1 Interest Rate will be increased for the
                             remainder of the life of the Class A-1 Bonds to the
                             lesser of (i) a per annum floating rate equal to
                             LIBOR for the related Interest Accrual Period plus
                             0.76% and (ii) 10.38% per annum and (b) the Class
                             A-2 Interest Rate will be increased for the
                             remainder of the life of the Class A-2 Bonds to the
                             lesser of (i) a per annum floating rate equal to
                             the Fed Funds Average Rate for the related Interest
                             Accrual Period plus 0.92% and (ii) 10.38% per
                             annum; provided, however, that such rates will be
                             subject to certain available funds limitations in
                             the event that a default under the Bond Insurance
                             Policy has occurred and is continuing, as described
                             under "DESCRIPTION OF THE BONDS -- Interest"
                             herein. At the option of the Issuer, such an
                             optional redemption of the Bonds can be effected
                             without retiring such Bonds so that the Issuer has
                             the ability to own or resell such Bonds. Upon
                             redemption and retirement of the Bonds the
                             collateral securing the Bonds will be released from
                             the lien of the Indenture.
 
                             The Bonds will be subject to mandatory redemption
                             by the Issuer at the Redemption Price in the event
                             that the Master Servicer or the Insurer exercises
                             its option to purchase all of the remaining Pledged
                             Mortgages. Such option may be exercised by the
                             Master Servicer (or if the Master Servicer fails to
                             exercise such option, by the Insurer) on any
                             Payment Date after the Payment Date with respect to
                             which the Pool Principal Balance is equal to 10% or
                             less of the Initial Pool Principal Balance at a
                             price determined pursuant to the Master Servicing
                             Agreement, which price shall not be less than the
                             amount necessary to cause the redemption of the
                             Bonds to occur at the Redemption Price. The Master
                             Servicer or Insurer will be required to give the
                             Issuer 90 days' notice of the intent to exercise
                             the purchase option during which period the Issuer
                             will continue to have the right to redeem the Bonds
                             as described above. See
 
                                       S-6
<PAGE>   7
 
                             "DESCRIPTION OF THE BONDS -- Redemption" herein and
                             "DESCRIPTION OF THE BONDS -- Optional Redemption"
                             in the Prospectus.
 
                             The "Pool Principal Balance" with respect to any
                             Payment Date equals the aggregate of the Stated
                             Principal Balances of the Pledged Mortgages
                             outstanding on the Due Date in the month preceding
                             the month of such Payment Date. The "Initial Pool
                             Principal Balance" means the Pool Principal Balance
                             as of the Cut-off Date. "Stated Principal Balance"
                             means, as to any Pledged Mortgage and Due Date, the
                             unpaid principal balance of such Pledged Mortgage
                             as of such Due Date, as specified in the
                             amortization schedule at the time relating thereto
                             (before any adjustment to such amortization
                             schedule by reason of any moratorium or similar
                             waiver or grace period), after giving effect to any
                             previous partial principal prepayments and
                             Liquidation Proceeds received and to the payment of
                             principal due on such Due Date and irrespective of
                             any delinquency in payment by the related
                             Mortgagor.
 
Credit Enhancement.........  The credit enhancement provided for the benefit of
                             the Bondholders consists solely of (a) excess
                             spread, (b) overcollateralization (both (a) and (b)
                             utilizing the internal cashflows of the Pledged
                             Mortgages) and (c) the Bond Insurance Policy.
 
 A. Excess Spread..........  Credit support for the Bonds will be provided to
                             the extent that excess spread exists, i.e., to the
                             extent that a positive spread may exist between the
                             weighted average at the beginning of the related
                             Due Period of the Net Mortgage Rates on the Pledged
                             Mortgages (the "Weighted Average Net Mortgage
                             Rate") and the weighted average of the Bond
                             Interest Rates (any such positive spread, the
                             "Positive Rate Differential"). Whether at any time
                             any Positive Rate Differential exists will depend
                             on a variety of factors, including the relationship
                             of the movements in the indices applicable to the
                             Pledged Mortgages and those applicable to the
                             Bonds, over which no prediction can be made or
                             assurance given.
 
                             The "Net Mortgage Rate" of a Pledged Mortgage is
                             the Mortgage Rate thereof minus the related Expense
                             Fee Rate.
 
                             The "Expense Fee Rate" for a Pledged Mortgage for
                             any calendar month equals the sum of the Servicing
                             Fee Rate for such Pledged Mortgage and the per
                             annum rate that represents such Pledged Mortgage's
                             pro rata share, for such month, of the sum of the
                             Management Fee and the Bond Insurance Policy
                             premium. The "Servicing Fee Rate" for each Pledged
                             Mortgage represents the per annum rate at which the
                             servicing compensation for the related Servicer
                             (the "Servicing Fee") accrues and (a) for 99.7% of
                             the Pledged Mortgages, as of the Cut-Off Date, will
                             range from 0.250% to 0.455% and (b) for 0.3% of the
                             Pledged Mortgages, as of the Cut-Off Date, will
                             range from 0.845% to 1.250%. Included in the
                             Servicing Fee Rate for certain Pledged Mortgages is
                             lender paid primary mortgage insurance. The
                             "Management Fee" represents the compensation
                             payable to Redwood Trust as manager under the
                             Management Agreement and will equal $1,000 per
                             month.
 
 B. Overcollateralization... Additional credit support for the Bonds will be
                             provided through limited overcollateralization,
                             i.e., the pledge to the Bond Trustee on the Closing
                             Date of Pledged Mortgages having an aggregate
                             Stated Principal Balance in excess of the Bond
                             Principal Balance on the Closing Date. Such
 
                                       S-7
<PAGE>   8
 
                             excess is the "Overcollateralization Amount" as of
                             the Closing Date. Thereafter, with respect to any
                             Payment Date, the "Overcollateralization Amount"
                             equals the excess, if any, of (x) the Pool
                             Principal Balance with respect to such Payment
                             Date, over (y) the Bond Principal Balance as of
                             such Payment Date (and following the making of all
                             payments on such Payment Date). After the Closing
                             Date, principal distributions on the Bonds will be
                             made on each Payment Date, to the extent of Net
                             Available Funds available therefor, in amounts up
                             to the amount necessary to maintain the
                             Overcollateralization Amount at a level equal to
                             the Specified Overcollateralization Amount. The
                             Specified Overcollateralization Amount may adjust
                             after the Closing Date, as described herein. See
                             "DESCRIPTION OF THE BONDS -- Principal" and
                             "-- Overcollateralization
                             Provisions -- Overcollateralization Resulting from
                             Cashflow Structure" herein.
 
 C. Bond Insurance
      Policy...............  On the Closing Date, MBIA Insurance Corporation
                             (the "Insurer") will issue a financial guaranty
                             insurance policy (the "Bond Insurance Policy")
                             pursuant to which it will irrevocably and
                             unconditionally guarantee payment of the Insured
                             Payments, as described herein. See "DESCRIPTION OF
                             THE BONDS -- Bond Insurance Policy" herein.
 
                             On each Payment Date, if necessary, a claim will be
                             made on the Bond Insurance Policy to cover (a) for
                             any Payment Date prior to the Stated Maturity, an
                             amount equal to the sum of (i) the excess, if any,
                             of the Interest Payment Amount over the Net
                             Available Funds for such Payment Date and (ii) the
                             Subordination Deficit, (b) for the Stated Maturity,
                             an amount equal to the sum of (i) the excess, if
                             any, of the Interest Payment Amount over the Net
                             Available Funds for such Payment Date and (ii) the
                             excess, if any, of the Bond Principal Balance of
                             the Bonds over Net Available Funds not used to pay
                             the Interest Payment Amount for such Stated
                             Maturity and (c) for any date on which the
                             acceleration or redemption of the Bonds has been
                             directed or consented to by the Insurer pursuant to
                             the Agreement, an amount equal to the excess, if
                             any, of the sum of the Bond Principal Balance of
                             the Bonds together with accrued and unpaid interest
                             thereon through the date of payment of such
                             accelerated or redeemed Bonds over the Net
                             Available Funds for such Payment Date (the
                             "Deficiency Amount").
 
                             The Insurer will be subrogated to the rights of the
                             Bondholders to receive any payments on the Bonds to
                             the extent of payments under the Bond Insurance
                             Policy that remain unreimbursed. In addition, under
                             the Indenture, absent the existence and
                             continuation of a default by the Insurer under the
                             Bond Insurance Policy, the Insurer will be entitled
                             to exercise certain voting rights of the
                             Bondholders without the consent of such
                             Bondholders, and the Bondholders may exercise such
                             rights only with the prior written consent of the
                             Insurer. In addition, absent the existence and
                             continuation of a default by the Insurer, the
                             Insurer, rather than the Bond Trustee or the
                             Bondholders, will have the right to direct all
                             matters relating to the Bonds in any proceeding in
                             a bankruptcy of the Issuer. See "DESCRIPTION OF THE
                             BONDS -- The Bond Insurance Policy" herein.
 
                             The Insurer is the principal operating subsidiary
                             of MBIA Inc., a New York Stock Exchange listed
                             company. The Insurer's claims-paying ability is
                             rated "Aaa" by Moody's Investors Service, Inc.
                             ("Moody's"),
 
                                       S-8
<PAGE>   9
 
                             "AAA" by Standard & Poor's Ratings Services, a
                             division of The McGraw-Hill Companies, Inc. ("S&P")
                             and "AAA" by Fitch Investors Service, L.P.
                             ("Fitch"). There is no expectation that Fitch will
                             rate the Bonds on the Closing Date or at any time
                             in the future. See "DESCRIPTION OF THE BONDS -- The
                             Insurer" herein.
 
Advances...................  Each Servicer is obligated to make cash advances
                             ("Advances") with respect to delinquent payments of
                             principal and interest on any Pledged Mortgage
                             serviced by it to the extent described herein. The
                             Master Servicer is obligated to make Advances only
                             to the limited extent described herein in the event
                             that a Servicer would otherwise have been so
                             obligated but has defaulted in its obligation to do
                             so. See "SERVICING OF THE PLEDGED MORTGAGES"
                             herein.
 
Certain Prepayment and
  Yield Considerations and
  Risks....................  The rate of principal payments on the Bonds, the
                             aggregate amount of payments on the Bonds and the
                             yields to maturity of the Bonds will be related to
                             the rate and timing of payments of principal on the
                             Pledged Mortgages and the level of the applicable
                             Bond Interest Rate.
 
                             Since the rate of payment of principal on the
                             Pledged Mortgages will depend on future events, no
                             assurance can be given as to such rate or the rate
                             of principal prepayments. The extent to which the
                             yield to maturity of a Bond may vary from the
                             anticipated yield may depend upon the degree to
                             which it is purchased at a discount or premium, and
                             the degree to which the timing of payments thereon
                             is sensitive to prepayments, liquidations and
                             purchases of the Pledged Mortgages. Further, an
                             investor should consider the risk that, in the case
                             of any Bond purchased at a discount, a slower than
                             anticipated rate of principal payments (including
                             prepayments) on the Pledged Mortgages could result
                             in an actual yield to such investor that is lower
                             than the anticipated yield and, in the case of any
                             Bond purchased at a premium, a faster than
                             anticipated rate of principal payments on the
                             Pledged Mortgages could result in an actual yield
                             to such investor that is lower than the anticipated
                             yield.
 
                             Because the Pledged Mortgages may be prepaid at any
                             time, it is not possible to predict the rate at
                             which payments of principal of the Bonds will be
                             received. Since prevailing interest rates are
                             subject to fluctuation, there can be no assurance
                             that investors in the Bonds will be able to
                             reinvest the payments thereon at yields equaling or
                             exceeding the yields on such Bonds. It is possible
                             that yields on any such reinvestments will be
                             lower, and may be significantly lower, than the
                             yields on the Bonds. See "RISK FACTORS -- Yield,
                             Prepayment and Maturity Risks" herein and "RISK
                             FACTORS -- Prepayment and Yield Considerations;
                             Reinvestment Risk" in the Prospectus.
 
Security for the Bonds.....  The Bonds will be secured by collateral consisting
                             of the items (in addition to the credit enhancement
                             provided by the Bond Insurance Policy) set forth
                             below:
 
 A. Pledged Mortgages......  The Pledged Mortgages will consist primarily of a
                             pool (the "Pledged Mortgage Pool") of conventional,
                             adjustable rate, primarily 30-year mortgage loans
                             secured by first liens on one- to four-family
                             residential properties and having an Initial Pool
                             Principal Balance equal to approximately
                             $543,050,415.20. Payments of principal and interest
                             on the Bonds will be based on payments received on
                             the Pledged Mortgages, as
 
                                       S-9
<PAGE>   10
 
                             described herein. See "SECURITY FOR THE
                             BONDS -- The Pledged Mortgages" and "DESCRIPTION OF
                             THE BONDS -- Payments of Interest" and "-- Payments
                             of Principal" herein and in the Prospectus.
 
                             The Mortgage Rate for each Pledged Mortgage will
                             either (i) adjust annually based on the weekly
                             average yield on U.S. Treasury securities adjusted
                             to a constant maturity of one year, as published by
                             the Federal Reserve Board ("One-Year CMT"), (ii)
                             adjust every six months based on six-month LIBOR,
                             as specified in the related Mortgage Note ("Six-
                             Month LIBOR"), or (iii) adjust monthly based on
                             one-month LIBOR, as specified in the related
                             Mortgage Note ("One-Month LIBOR" and, together with
                             One-Year CMT and Six-Month LIBOR, the "Indices"),
                             provided, however, the Mortgage Rates on 10.72% (by
                             aggregate principal balance) of the Pledged
                             Mortgages have next rate adjustment dates ranging
                             from May 1, 1999 to December 1, 1999. The date on
                             which the Mortgage Rate for a Mortgage Loan adjusts
                             is referred to as the "Adjustment Date."
 
                             Certain of the Pledged Mortgages that have Mortgage
                             Rates based on One-Month LIBOR contain provisions
                             for adjusting such Mortgage Rate more frequently
                             than the adjustments to the Scheduled Payments (as
                             defined herein) and the adjustments to such
                             Scheduled Payments may be subject to certain
                             limitations as described herein (such Pledged
                             Mortgages, the "Neg-Am Mortgages"). This feature
                             may result in negative, slower or faster
                             amortization of the principal of such Neg-Am
                             Mortgages than was expected at the time such Neg-Am
                             Mortgages were originated. It is expected that
                             these Neg-Am Mortgages will negatively amortize
                             following origination unless the related mortgagor
                             makes payments thereon in excess of the Scheduled
                             Payments.
 
                             Approximately 24% of the Pledged Mortgages (by
                             Initial Pool Principal Balance) grant the related
                             mortgagor the option to convert the adjustable
                             Mortgage Rate to a fixed Mortgage Rate (each, a
                             "Convertible Pledged Mortgage"). Upon such a
                             conversion, such Pledged Mortgage will be subject
                             to repurchase from the Issuer subject to the
                             limitations described under "SECURITY FOR THE
                             BONDS -- Convertible Mortgage Loans" herein.
 
                             See "SECURITY FOR THE BONDS -- The Pledged
                             Mortgages", and "-- The Indices" herein.
 
 B. Bond Account...........  On or prior to the Closing Date, the Master
                             Servicer will establish and maintain or cause to be
                             established and maintained a separate account or
                             accounts for the collection of payments on the
                             Pledged Mortgages (the "Bond Account"). See
                             "DESCRIPTION OF THE BONDS -- Payments on Pledged
                             Mortgages; Accounts" herein and "SERVICING OF THE
                             PLEDGED MORTGAGES" herein and in the Prospectus.
 
 C. Distribution Account...  On or prior to the Closing Date, the Bond Trustee
                             will establish an account (the "Distribution
                             Account") which will be maintained with the Bond
                             Trustee for the benefit of the Bondholders and the
                             Insurer. No later than one business day prior to
                             each Payment Date, the Master Servicer will
                             withdraw from the Bond Account the Available Funds
                             (as defined herein) for such Payment Date, and will
                             deposit such amount in the Distribution Account.
                             See "DESCRIPTION OF THE BONDS --
 
                                      S-10
<PAGE>   11
 
                             Payments on Pledged Mortgages; Accounts" herein and
                             "SERVICING OF THE PLEDGED MORTGAGES" herein and in
                             the Prospectus.
 
Federal Income Tax
  Consequences.............  The Bonds will be treated as debt for federal
                             income tax purposes, and interest will be taxable
                             to non-exempt Bondholders. The prepayment rate used
                             by the Issuer for purposes of determining the
                             amount and rate of accrual of original issue
                             discount on the Bonds assumes that the Pledged
                             Mortgages are prepaid at a rate of 21% CPR. Based
                             upon the assumed prepayment rate and expected price
                             to the public of the Bonds as of the date hereof
                             (including interest accrued before the Closing
                             Date, if any) the Bonds will not be issued with
                             original issue discount. The Issuer intends to
                             treat the Bonds as "Variable Rate Debt Instruments"
                             and the stated interest on the Bonds as "qualified
                             stated interest payments" (as each such term is
                             defined in the Prospectus under "FEDERAL INCOME TAX
                             CONSEQUENCES").
 
                             Notwithstanding the use of the Prepayment
                             Assumption in pricing the Bonds, no representation
                             is made that the Pledged Mortgages will actually
                             prepay at such assumed prepayment rate or at any
                             other rate. The amount of original issue discount,
                             if any, and certain other information with respect
                             to each Bond will be set forth on the face of such
                             Bond as required by applicable regulations.
                             Payments on Bonds held by foreign persons will
                             generally be exempt from United States withholding
                             tax, subject to compliance with applicable
                             certification procedures. Tax counsel to the Issuer
                             has advised the Issuer that in its opinion the
                             Bonds will be treated as debt for federal income
                             tax purposes and not as an ownership interest in
                             the Mortgage Collateral, the Issuer or a separate
                             association taxable as a corporation. The Issuer
                             will not elect to treat the segregated pool of
                             assets securing the Bonds as a "real estate
                             mortgage investment conduit" for federal income tax
                             purposes. See "FEDERAL INCOME TAX CONSEQUENCES" in
                             the Prospectus.
 
                             As a result, Bonds owned by a real estate
                             investment trust will not be treated as "real
                             estate assets" or "Government securities" and
                             interest on the Bonds will not be considered
                             "interest on obligations secured by mortgages on
                             real property or on interests in real property."
                             Similarly, the Bonds will not constitute
                             "qualifying real property loans" for mutual savings
                             banks or domestic building and loan associations
                             and will not constitute "loans secured by an
                             interest in real property" or "obligations of the
                             United States" for domestic building and loan
                             associations. In addition, Bonds held by a
                             regulated investment company will not constitute
                             "Government securities." See "FEDERAL INCOME TAX
                             CONSEQUENCES" in the Prospectus.
 
ERISA Matters..............  Fiduciaries of employee benefit plans and certain
                             other retirement plans and arrangements that are
                             subject to the Employee Retirement Income Security
                             Act of 1974, as amended ("ERISA"), or corresponding
                             provisions of the Internal Revenue Code of 1986, as
                             amended (the "Code"), including individual
                             retirement accounts and annuities, Keogh plans and
                             collective investment funds in which such plans,
                             accounts, annuities or arrangements are invested
                             (any of the foregoing a "Plan"), persons acting on
                             behalf of a Plan, or persons using the assets of a
                             Plan ("Plan Investors"), should review carefully
                             with their legal advisors whether the purchase or
                             holding of the Bonds could either give rise to a
                             transaction
 
                                      S-11
<PAGE>   12
 
                             that is prohibited under ERISA or the Code or cause
                             the Pledged Mortgages securing the Bonds to be
                             treated as plan assets for purposes of regulations
                             of the Department of Labor set forth in 29 C.F.R.
                             2510.3-101 (the "Plan Asset Regulations"). Although
                             certain exceptions from the application of the
                             prohibited transaction rules and the Plan Asset
                             Regulations exist, there can be no assurance that
                             any such exception will apply with respect to the
                             acquisition of the Bonds. See "ERISA MATTERS"
                             herein and in the Prospectus. Although not entirely
                             free from doubt, the Issuer believes that the Bonds
                             will be treated as debt obligations without
                             significant equity features for purposes of the
                             Plan Asset Regulations. Accordingly, a Plan that
                             acquires the Bonds should not be treated as having
                             acquired a direct interest in the assets of the
                             Issuer. See "ERISA MATTERS" herein and in the
                             Prospectus. However, there can be no complete
                             assurance that the Bonds will be treated as debt
                             obligations without significant equity features for
                             purposes of the Plan Asset Regulations.
 
Legal Investment...........  The Bonds will constitute "mortgage related
                             securities" for purposes of the Secondary Mortgage
                             Market Enhancement Act of 1984 ("SMMEA") so long as
                             they are rated in one of the two highest rating
                             categories by at least one nationally recognized
                             statistical rating organization and, as such, are
                             legal investments for certain entities to the
                             extent provided for in SMMEA. Institutions whose
                             investment activities are subject to review by
                             federal or state regulatory authorities should
                             consult with their counsel or the applicable
                             authorities to determine whether an investment in
                             the Bonds complies with applicable guidelines,
                             policy statements or restrictions. See "LEGAL
                             INVESTMENT" in the Prospectus.
 
Ratings....................  It is a condition of the issuance of the Bonds that
                             they be rated "Aaa" by Moody's and "AAA" by S&P
                             (S&P and Moody's collectively, the "Rating
                             Agencies"). The ratings of the Bonds should be
                             evaluated independently from similar ratings on
                             other types of securities. A rating is not a
                             recommendation to buy, sell or hold securities and
                             may be subject to revision or withdrawal at any
                             time by the Rating Agencies. See "RATINGS" herein.
 
                             The Issuer has not requested a rating of the Bonds
                             by any rating agency other than the Rating
                             Agencies; there can be no assurance, however, as to
                             whether any other rating agency will rate the Bonds
                             or, if it does, what rating would be assigned by
                             such other rating agency. The rating assigned by
                             such other rating agency to the Bonds could be
                             lower than the respective ratings assigned by the
                             Rating Agencies.
 
Use of Proceeds............  The Issuer intends to distribute all of the net
                             proceeds of the issuance of the Bonds to the
                             Company which will apply such proceeds to the
                             purchase of the Pledged Mortgages. The Pledged
                             Mortgages will be purchased by the Company from
                             Redwood Trust and sold to the Issuer by the
                             Company. See "USE OF PROCEEDS" herein and in the
                             Prospectus and "METHOD OF DISTRIBUTION" herein.
 
Risk Factors...............  For a discussion of certain risks associated with
                             an investment in the Bonds, see "RISK FACTORS"
                             commencing on page S-13 herein and on page 19 in
                             the Prospectus.
 
                                      S-12
<PAGE>   13
 
                                  RISK FACTORS
 
YIELD, PREPAYMENT AND MATURITY RISKS
 
     The rate of principal payments on the Bonds, the aggregate amount of
payments on the Bonds and the yields to maturity of the Bonds will be related to
the rate and timing of payments of principal on the Pledged Mortgages. The rate
of principal payments on the Pledged Mortgages will in turn be affected by the
amortization schedules of the Pledged Mortgages and by the rate of principal
prepayments (including for this purpose prepayments resulting from refinancing,
liquidations of the Pledged Mortgages due to defaults, casualties, condemnations
and other events described below). The Pledged Mortgages may be prepaid by the
Mortgagors at any time without a prepayment penalty. Generally, the Pledged
Mortgages contain "due-on-sale" provisions, subject to applicable law and
standard assumption clauses. See "SECURITY FOR THE BONDS -- The Pledged
Mortgages" herein.
 
     Prepayments, liquidations and purchases of the Pledged Mortgages (including
any optional purchase by the Company or a Servicer of a Delinquent Pledged
Mortgage, purchases by Redwood Trust or the Issuer of a Defective Pledged
Mortgage, any optional redemption of the Bonds by the Issuer and any redemption
of the Bonds by the Issuer in connection with the exercise by the Master
Servicer or the Insurer of its option to purchase the remaining Pledged
Mortgages, in each case as described herein) will result in payments on the
Bonds of principal amounts which would otherwise be distributed over the
remaining terms of the Pledged Mortgages. Since the rate of payment of principal
on the Pledged Mortgages will depend on future events, no assurance can be given
as to such rate or the rate of principal prepayments. The extent to which the
yield to maturity of a Bond may vary from the anticipated yield will depend upon
the degree to which such Bond is purchased at a discount or premium, and the
degree to which the timing of payments thereon is sensitive to prepayments,
liquidations and purchases of the Pledged Mortgages. Further, an investor should
consider the risk that, in the case of any Bond purchased at a discount, a
slower than anticipated rate of principal payments (including prepayments) on
the Pledged Mortgages could result in an actual yield to such investor that is
lower than the anticipated yield and, in the case of any Bond purchased at a
premium, a faster than anticipated rate of principal payments on the Pledged
Mortgages could result in an actual yield to such investor that is lower than
the anticipated yield.
 
     The rate of principal payments (including prepayments) on pools of mortgage
loans may vary significantly over time and may be influenced by a variety of
economic, geographic, social and other factors, including changes in mortgagors'
housing needs, job transfers, unemployment, mortgagors' net equity in the
mortgaged properties and servicing decisions. In general, if prevailing interest
rates were to fall significantly below the Mortgage Rates on the Pledged
Mortgages, the Pledged Mortgages could be subject to higher prepayment rates
than if prevailing interest rates were to remain at or above the Mortgage Rates
on the Pledged Mortgages. Conversely, if prevailing interest rates were to rise
significantly, the rate of prepayments on the Pledged Mortgages would generally
be expected to decrease. No assurances can be given as to the rate of
prepayments on the Pledged Mortgages in stable or changing interest rate
environments.
 
     The timing of changes in the rate of prepayments on the Pledged Mortgages
may significantly affect an investor's actual yield to maturity, even if the
average rate of principal payments is consistent with an investor's expectation.
In general, the earlier a prepayment of principal on the Pledged Mortgages, the
greater the effect on an investor's yield to maturity. The effect on an
investor's yield as a result of principal payments occurring at a rate higher
(or lower) than the rate anticipated by the investor during the period
immediately following the issuance of the Bonds may not be offset by a
subsequent like decrease (or increase) in the rate of principal payments.
 
     NO REPRESENTATION IS MADE AS TO THE RATE OF PRINCIPAL PAYMENTS ON THE
PLEDGED MORTGAGES OR AS TO THE YIELD TO MATURITY OF THE BONDS. INVESTORS ARE
URGED TO MAKE AN INVESTMENT DECISION WITH RESPECT TO THE BONDS BASED ON THE
ANTICIPATED YIELD TO MATURITY OF SUCH BONDS RESULTING FROM THEIR RESPECTIVE
PRICES AND EACH INVESTOR'S OWN DETERMINATION AS TO ANTICIPATED PLEDGED MORTGAGE
PREPAYMENT RATES.
 
CASHFLOW CONSIDERATIONS AND RISKS
 
     Even assuming that the Mortgaged Properties provide adequate security for
the Pledged Mortgages, substantial delays could be encountered in connection
with the liquidation of Pledged Mortgages that are
 
                                      S-13
<PAGE>   14
 
delinquent, which could result in shortfalls in payments on the Bonds if the
credit enhancement created by the overcollateralization of the Bonds and any
Positive Rate Differential with respect to the Pledged Mortgages is insufficient
and if payments under the Bond Insurance Policy were unavailable. Further,
liquidation expenses (such as legal fees, real estate taxes, and maintenance and
preservation expenses) will reduce the security for the related Pledged
Mortgages and could thereby reduce the proceeds payable to holders of the Bonds.
In the event any of the Mortgaged Properties fail to provide adequate security
for the related Pledged Mortgages, holders of the Bonds could experience a loss
if the credit enhancement created by the overcollateralization of the Bonds and
any Positive Rate Differential with respect to the Pledged Mortgages has been
exhausted and if payments under the Bond Insurance Policy were unavailable.
 
LIMITED RECOURSE
 
     The Bonds represent limited obligations of the Issuer payable solely by
collateral pledged under the Indenture and are not insured by any governmental
agency or instrumentality, the Company, Redwood Trust, the Master Servicer, any
Servicer, or, except as set forth herein, the Insurer or any other person or
entity.
 
DELINQUENCIES MAY ADVERSELY AFFECT INVESTMENT
 
     As of the Cut-off Date, 1.51% of the Pledged Mortgages (by Initial Pool
Principal Balance) were delinquent by one Scheduled Payment and none of the
Pledged Mortgages (by Initial Pool Principal Balance) were delinquent by two or
more Scheduled Payments. Investors should consider the risk that the inclusion
of such loans in the Pledged Mortgages may affect the rates of defaults and
prepayments on such Pledged Mortgages and the yields on the Bonds. See "SECURITY
FOR THE BONDS -- The Pledged Mortgages" herein.
 
PLEDGED MORTGAGE CONCENTRATION
 
     Approximately 41.03% and 7.01% of the Pledged Mortgages (by Initial Pool
Principal Balance) are secured by Mortgaged Properties located in California and
Maryland, respectively. Consequently, losses and prepayments on the Pledged
Mortgages and the resultant payments on the Bonds may be affected significantly
by changes in the housing markets and the regional economies in these areas, and
also by the occurrence of natural disasters (such as earthquakes, hurricanes,
tornados, tidal waves, mud slides, fires and floods) in these areas.
 
LIMITED LIQUIDITY OF INVESTMENT
 
     There can be no assurance that a secondary market will develop for the
Bonds, or, if one does develop, that it will provide the holders of the Bonds
with liquidity of investment or that it will continue to exist for the term of
the Bonds.
 
BANKRUPTCY AND INSOLVENCY RISKS
 
     Redwood Trust, the Company and the Issuer will treat the transfer of the
Pledged Mortgages by Redwood Trust to the Company and from the Company to the
Issuer as a sale for all purposes. Nevertheless, in the event of a bankruptcy of
Redwood Trust the trustee in bankruptcy could attempt to recharacterize the sale
of the Pledged Mortgages to the Company as a borrowing secured by a pledge of
mortgage loans, and in the event of a bankruptcy of the Company, the trustee in
bankruptcy could attempt to recharacterize the sale of the Pledged Mortgages to
the Issuer as a borrowing secured by a pledge of mortgage loans.
 
     In either case, if such an attempt to recharacterize the transfer of the
loans were successful, a trustee in bankruptcy could elect to accelerate payment
of the Bonds and liquidate the Pledged Mortgages, with the holders of the Bonds
entitled to no more than the then outstanding Bond Principal Balance, if any, of
such Bonds together with interest at the Bond Interest Rate to the date of
payment. In the event of an acceleration of the Bonds, the holders of the Bonds
would lose the right to future payments of interest, might suffer reinvestment
losses in a lower interest rate environment and may fail to recover their
initial investment.
 
                                      S-14
<PAGE>   15
 
BOOK-ENTRY BONDS
 
     LIMITED LIQUIDITY. Issuance of the Bonds in book-entry form may reduce the
liquidity of such Bonds in the secondary trading market since investors may be
unwilling to purchase Bonds for which they cannot obtain physical certificates.
See "DESCRIPTION OF THE BONDS -- Book-Entry Bonds" herein and in the Prospectus
and "RISK FACTORS -- Effects of Book-Entry Registration" in the Prospectus.
 
     DIFFICULTY IN PLEDGING. Since transactions in the Bonds can be effected
only through DTC, CEDEL, Euroclear, participating organizations, indirect
participants and certain banks, the ability of a Bond Owner (as defined herein)
to pledge a Bond to persons or entities that do not participate in the DTC,
CEDEL or Euroclear system may be limited due to lack of a physical certificate
representing the Bonds. See "DESCRIPTION OF THE BONDS -- Book-Entry Bonds"
herein and in the Prospectus and "RISK FACTORS -- Effects of Book-Entry
Registration" in the Prospectus.
 
     POTENTIAL DELAYS IN PAYMENT. Bond Owners may experience some delay in their
receipt of payments of interest and principal on the Bonds since such payments
will be forwarded by the Bond Trustee to DTC and DTC will credit such payments
to the accounts of its Participants (as defined herein) which will thereafter
credit them to the accounts of Bond Owners either directly or indirectly through
indirect participants. Bond Owners will not be recognized as Bondholders as such
term is used in the Indenture, and Bond Owners will be permitted to exercise the
rights of Bondholders only indirectly through DTC and its Participants. See
"DESCRIPTION OF THE BONDS -- Book-Entry Bonds" herein and in the Prospectus and
"RISK FACTORS -- Effects of Book-Entry Registration" in the Prospectus.
 
RATINGS
 
     The ratings of the Bonds will depend primarily on an assessment by the
Rating Agencies of the claims-paying ability of the Insurer. Any reduction in
the rating assigned to the claims-paying ability of the Insurer below the rating
initially given to the Bonds would likely result in a reduction in the rating of
the Bonds. The rating by the Rating Agencies of the Bonds is not a
recommendation to purchase, hold or sell the Bonds, inasmuch as such rating does
not comment as to the market price or suitability for a particular investor.
There is no assurance that the ratings will remain in place for any given period
of time or that the ratings will not be lowered or withdrawn by the Rating
Agencies. In general, ratings assess credit risk and do not address likelihood
of prepayments.
 
     FOR A DISCUSSION OF CERTAIN ADDITIONAL RISK FACTORS RELATING TO INVESTMENTS
IN THE BONDS, SEE "RISK FACTORS" IN THE PROSPECTUS.
 
                                   THE ISSUER
 
     The Issuer is a statutory business trust established under the laws of the
State of Delaware on July 17, 1997 by a deposit trust agreement, as amended and
restated. The Issuer was formed for the sole purpose of issuing the Bonds and
the Investor Certificate. The Company is the settlor and sole beneficiary of the
Issuer and Wilmington Trust Company is the Owner Trustee of the Issuer. The
Company is a limited purpose finance corporation, the capital stock of which is
wholly owned by Redwood Trust, Inc., a Maryland corporation ("Redwood Trust").
Redwood Trust will be the manager of the Issuer pursuant to a management
agreement entered into with the Issuer. None of the Company, Redwood Trust,
Wilmington Trust Company or any of their respective affiliates has guaranteed or
is otherwise obligated with respect to payment of the Bonds and no person or
entity other than the Issuer is obligated to pay the Bonds, except as
specifically set forth herein with regard to the Bond Insurance Policy. See
"DESCRIPTION OF THE BONDS -- Bond Insurance Policy" herein.
 
     The Indenture and the Deposit Trust Agreement prohibit the Issuer from
incurring any indebtedness other than the Bonds, or assuming or guaranteeing the
indebtedness of any other person.
 
                                      S-15
<PAGE>   16
 
                            DESCRIPTION OF THE BONDS
 
GENERAL
 
     The Bonds will be issued pursuant to the Indenture. Set forth below are
summaries of the specific terms and provisions pursuant to which the Bonds will
be issued. The following summaries are subject to, and are qualified in their
entirety by reference to, the provisions of the Indenture. When particular
provisions or terms used in the Indenture are referred to, the actual provisions
(including definitions of terms) are incorporated by reference.
 
     The Issuer will issue the Sequoia Mortgage Trust 1, Collateralized Mortgage
Bonds (the "Bonds") in two Classes designated as Class A-1 and Class A-2. The
Issuer will also issue a trust certificate evidencing a beneficial interest in
the Issuer (the "Investor Certificate") to the Company as described herein. Only
the Bonds are offered hereby. Each Class of Bonds will bear interest at the
applicable Bond Interest Rate described herein.
 
BOOK-ENTRY BONDS
 
     The Bonds will be book-entry Bonds ("Book-Entry Bonds"). Persons acquiring
beneficial ownership interests in the Bonds ("Bond Owners") may elect to hold
their Bonds through the Depository Trust Company ("DTC") in the United States,
or CEDEL or Euroclear (in Europe) if they are participants of such systems, or
indirectly through organizations which are participants in such systems. The
Book-Entry Bonds will be issued in one or more certificates which equal the
aggregate principal amount of the Bonds and will initially be registered in the
name of Cede & Co., the nominee of DTC. CEDEL and Euroclear will hold omnibus
positions on behalf of their participants through customers' securities accounts
in CEDEL's and Euroclear's names on the books of their respective depositaries
which in turn will hold such positions in customers' securities accounts in the
depositaries' names on the books of DTC. Citibank, N.A., will act as depositary
for CEDEL and The Chase Manhattan Bank will act as depositary for Euroclear (in
such capacities, individually the "Relevant Depositary" and collectively the
"European Depositaries"). Investors may hold such beneficial interests in the
Book-Entry Bonds in minimum denominations representing Bond Principal Balances
of $1,000 and in multiples of $1,000 in excess thereof. Except as described
below, no person acquiring a Book-Entry Bond (each, a "beneficial owner") will
be entitled to receive a physical certificate representing such Bond (a
"Definitive Bond"). Unless and until Definitive Bonds are issued, it is
anticipated that the only "Bondholders" of the Bonds will be Cede & Co., as
nominee of DTC. Bond Owners will not be Bondholders as that term is used in the
Indenture. Bond Owners are only permitted to exercise their rights indirectly
through the participating organizations that utilize the services of DTC,
including securities brokers and dealers, banks and trust companies and clearing
corporations and certain other organizations ("Participants") and DTC.
 
     The beneficial owner's ownership of a Book-Entry Bond will be recorded on
the records of the brokerage firm, bank, thrift institution or other financial
intermediary (each, a "Financial Intermediary") that maintains the beneficial
owner's account for such purpose. In turn, the Financial Intermediary's
ownership of such Book-Entry Bond will be recorded on the records of DTC (or of
a participating firm that acts as agent for the Financial Intermediary, whose
interest will in turn be recorded on the records of DTC, if the beneficial
owner's Financial Intermediary is not a DTC participant, and on the records of
CEDEL or Euroclear, as appropriate). Bond Owners will receive all payments of
principal of, and interest on, the Bonds from the Bond Trustee through DTC and
DTC participants. While the Bonds are outstanding (except under the
circumstances described below), under the rules, regulations and procedures
creating and affecting DTC and its operations (the "Rules"), DTC is required to
make book-entry transfers among Participants on whose behalf it acts with
respect to the Bonds and is required to receive and transmit payments of
principal of, and interest on, the Bonds. Participants and indirect participants
which have indirect access to the DTC system, such as banks, brokers, dealers
and trust companies that clear through or maintain a custodial relationship with
a Participant, either directly or indirectly ("Indirect Participants"), with
whom Bond Owners have accounts with respect to Bonds are similarly required to
make book-entry transfers and receive and transmit such payments on behalf of
their respective Bond Owners. Accordingly, although Bond Owners will not possess
certificates, the
 
                                      S-16
<PAGE>   17
 
Rules provide a mechanism by which Bond Owners will receive payments and will be
able to transfer their interest.
 
     Bond Owners will not receive or be entitled to receive certificates
representing their respective interests in the Bonds, except under the limited
circumstances described below. Unless and until Definitive Bonds are issued,
Bond Owners who are not Participants may transfer ownership of Bonds only
through Participants and Indirect Participants by instructing such Participants
and Indirect Participants to transfer Bonds, by book-entry transfer, through DTC
for the account of the purchasers of such Bonds, which account is maintained
with their respective Participants. Under the Rules and in accordance with DTC's
normal procedures, transfers of ownership of Bonds will be executed through DTC
and the accounts of the respective Participants at DTC will be debited and
credited. Similarly, the Participants and Indirect Participants will make debits
or credits, as the case may be, on their records on behalf of the selling and
purchasing Bond Owners.
 
     Because of time zone differences, credits of securities received in CEDEL
or Euroclear as a result of a transaction with a Participant will be made during
subsequent securities settlement processing and dated the business day following
the DTC settlement date. Such credits or any transactions in such securities
settled during such processing will be reported to the relevant Euroclear or
CEDEL Participants on such business day. Cash received in CEDEL or Euroclear as
a result of sales of securities by or through a CEDEL Participant (as defined
herein) or Euroclear Participant (as defined herein) to a DTC Participant will
be received with value on the DTC settlement date but will be available in the
relevant CEDEL or Euroclear cash account only as of the business day following
settlement in DTC. For information relating to tax documentation procedures
relating to the Bonds, see "FEDERAL INCOME TAX CONSEQUENCES -- Withholding with
Respect to Certain Foreign Investors" and "-- Backup Withholding" in the
Prospectus and "GLOBAL CLEARANCE, SETTLEMENT AND TAX DOCUMENTATION
PROCEDURES -- Certain U.S. Federal Income Tax Documentation Requirements" in
Annex I hereto.
 
     Transfers between Participants will occur in accordance with DTC Rules.
Transfers between CEDEL Participants and Euroclear Participants will occur in
accordance with their respective rules and operating procedures.
 
     Cross-market transfers between persons holding directly or indirectly
through DTC, on the one hand, and directly or indirectly through CEDEL
Participants or Euroclear Participants, on the other, will be effected in DTC in
accordance with DTC rules on behalf of the relevant European international
clearing system by the Relevant Depositary; however, such cross-market
transactions will require delivery of instructions to the relevant European
international clearing system by the counterparty in such system in accordance
with its rules and procedures and within its established deadlines (European
time). The relevant European international clearing system will, if the
transaction meets its settlement requirements, deliver instructions to the
Relevant Depositary to take action to effect final settlement on its behalf by
delivering or receiving securities in DTC, and making or receiving payment in
accordance with normal procedures for same day fund settlement applicable to
DTC. CEDEL Participants and Euroclear Participants may not deliver instructions
directly to the European Depositaries.
 
     DTC, which is a New York-chartered limited purpose trust company, performs
services for its participants, some of which (and/or their representatives) own
DTC. In accordance with its normal procedures, DTC is expected to record the
positions held by each DTC participant in the Book-Entry Bonds, whether held for
its own account or as nominee for another person. In general, beneficial
ownership of Book-Entry Bonds will be subject to the rules, regulations and
procedures governing DTC and DTC participants as in effect from time to time.
 
     CEDEL is incorporated under the laws of Luxembourg as a professional
depository. CEDEL holds securities for its participating organizations ("CEDEL
Participants") and facilitates the clearance and settlement of securities
transactions between CEDEL Participants through electronic book-entry changes in
accounts of CEDEL Participants, thereby eliminating the need for physical
movement of certificates. Transactions may be settled in CEDEL in any of 28
currencies, including United States dollars. CEDEL provides to its CEDEL
Participants, among other things, services for safekeeping, administration,
clearance and settlement of internationally traded securities and securities
lending and borrowing. CEDEL interfaces
 
                                      S-17
<PAGE>   18
 
with domestic markets in several countries. As a professional depository, CEDEL
is subject to regulation by the Luxembourg Monetary Institute. CEDEL
participants are recognized financial institutions around the world, including
underwriters, securities brokers and dealers, banks, trust companies, clearing
corporations and certain other organizations. Indirect access to CEDEL is also
available to others, such as banks, brokers, dealers and trust companies that
clear through or maintain a custodial relationship with a CEDEL Participant,
either directly or indirectly.
 
     Euroclear was created in 1968 to hold securities for its participants
("Euroclear Participants") and to clear and settle transactions between
Euroclear Participants through simultaneous electronic book-entry delivery
against payment, thereby eliminating the need for physical movement of
certificates and any risk from lack of simultaneous transfers of securities and
cash. Transactions may be settled in any of 32 currencies, including United
States dollars. Euroclear includes various other services, including securities
lending and borrowing and interfaces with domestic markets in several countries
generally similar to the arrangements for cross-market transfers with DTC
described above. Euroclear is operated by the Brussels, Belgium office of Morgan
Guaranty Trust Company of New York ("Morgan" and in such capacity, the
"Euroclear Operator"), under contract with Euroclear Clearance Systems S.C., a
Belgian cooperative corporation (the "Cooperative"). All operations are
conducted by Morgan, and all Euroclear securities clearance accounts and
Euroclear cash accounts are accounts with the Euroclear Operator, not the
Belgian Cooperative. The Belgian Cooperative establishes policy for Euroclear on
behalf of Euroclear Participants. Euroclear Participants include banks
(including central banks), securities brokers and dealers and other professional
financial intermediaries. Indirect access to Euroclear is also available to
other firms that clear through or maintain a custodial relationship with a
Euroclear Participant, either directly or indirectly.
 
     The Euroclear Operator is the Belgian branch of a New York banking
corporation which is a member bank of the Federal Reserve System. As such, it is
regulated and examined by the Board of Governors of the Federal Reserve System
and the New York State Banking Department, as well as the Belgian Banking
Commission.
 
     Securities clearance accounts and cash accounts with Morgan are governed by
the Terms and Conditions Governing Use of Euroclear and the related Operating
Procedures of the Euroclear System and applicable Belgian law (collectively, the
"Terms and Conditions"). The Terms and Conditions govern transfers of securities
and cash within Euroclear, withdrawals of securities and cash from Euroclear,
and receipts of payments with respect to securities in Euroclear. All securities
in Euroclear are held on a fungible basis without attribution of specific
certificates to specific securities clearance accounts. The Euroclear Operator
acts under the Terms and Conditions only on behalf of Euroclear Participants,
and has no record of or relationship with persons holding through Euroclear
Participants.
 
     Payments on the Book-Entry Bonds will be made on each Payment Date by the
Bond Trustee to DTC. DTC will be responsible for crediting the amount of such
payments to the accounts of the applicable DTC participants in accordance with
DTC's normal procedures. Each DTC participant will be responsible for disbursing
such payments to the beneficial owners of the Book-Entry Bonds that it
represents and to each Financial Intermediary for which it acts as agent. Each
such Financial Intermediary will be responsible for disbursing funds to the
beneficial owners of the Book-Entry Bonds that it represents.
 
     Under a book-entry format, beneficial owners of the Book-Entry Bonds may
experience some delay in their receipt of payments, since such payments will be
forwarded by the Bond Trustee to Cede & Co., as nominee of DTC. Payments with
respect to Bonds held through CEDEL or Euroclear will be credited to the cash
accounts of CEDEL Participants or Euroclear Participants in accordance with the
relevant system's rules and procedures, to the extent received by the Relevant
Depositary. Such payments will be subject to tax reporting in accordance with
relevant United States tax laws and regulations. See "FEDERAL INCOME TAX
CONSEQUENCES -- Withholding with Respect to Certain Foreign Investors" and
"-- Backup Withholding" in the Prospectus. Because DTC can only act on behalf of
Financial Intermediaries, the ability of a beneficial owner to pledge Book-Entry
Bonds to persons or entities that do not participate in the depository system,
or otherwise take actions in respect of such Book-Entry Bond, may be limited due
to the lack of physical certificates for such Book-Entry Bonds. In addition,
issuance of the Book-Entry Bonds in
 
                                      S-18
<PAGE>   19
 
book-entry form may reduce the liquidity of such Bonds in the secondary market
since certain potential investors may be unwilling to purchase Bonds for which
they cannot obtain physical certificates.
 
     Monthly and annual reports on the Issuer will be provided to Cede & Co., as
nominee of DTC, and may be made available by Cede & Co. to beneficial owners
upon request, in accordance with the rules, regulations and procedures creating
and affecting DTC or the Relevant Depositary, and to the Financial
Intermediaries to whose DTC accounts the Book-Entry Bonds of such beneficial
owners are credited.
 
     DTC has advised the Issuer and the Bond Trustee that, unless and until
Definitive Bonds are issued, DTC will take any action permitted to be taken by
the holders of the Book-Entry Bonds under the Indenture only at the direction of
one or more Financial Intermediaries to whose DTC accounts the Book-Entry Bonds
are credited, to the extent that such actions are taken on behalf of Financial
Intermediaries whose holdings include such Book-Entry Bonds. CEDEL or the
Euroclear Operator, as the case may be, will take any other action permitted to
be taken by a Bondholder under the Indenture on behalf of a CEDEL Participant or
Euroclear Participant only in accordance with its relevant rules and procedures
and subject to the ability of the Relevant Depositary to effect such actions on
its behalf through DTC. DTC may take actions, at the direction of the related
Participants, with respect to some Bonds which conflict with actions taken with
respect to other Bonds.
 
     Definitive Bonds will be issued to beneficial owners of the Book-Entry
Bonds, or their nominees rather than to DTC, only if (a) DTC or the Issuer
advises the Bond Trustee in writing that DTC is no longer willing, qualified or
able to discharge properly its responsibilities as nominee and depositary with
respect to the Book-Entry Bonds and the Issuer or the Bond Trustee is unable to
locate a qualified successor or (b) the Issuer, at its sole option, elects to
terminate a book-entry system through DTC. The Bond Trustee shall notify the
Insurer if the Bonds will no longer be Book-Entry Bonds.
 
     Upon the occurrence of any of the events described in the immediately
preceding paragraph, the Bond Trustee will be required to notify all beneficial
owners of the occurrence of such event and the availability through DTC of the
Definitive Bonds. Upon surrender by DTC of the global certificate or
certificates representing the Book-Entry Bonds and instructions for
re-registration, the Bond Trustee will issue Definitive Bonds, and thereafter
the Bond Trustee will recognize the holders of such Definitive Bonds as
Bondholders under the Indenture.
 
     Although DTC, CEDEL and Euroclear have agreed to the foregoing procedures
in order to facilitate transfers of Bonds among participants of DTC, CEDEL and
Euroclear, they are under no obligation to perform or continue to perform such
procedures and such procedures may be discontinued at any time.
 
     None of the Master Servicer, the Company, the Issuer, the Insurer or the
Bond Trustee will have any responsibility for any aspect of the records relating
to or payments made on account of beneficial ownership interests of the
Book-Entry Bonds held by Cede & Co., as nominee of DTC, or for maintaining,
supervising or reviewing any records relating to such beneficial ownership
interests.
 
     For a description of the procedures generally applicable to the Book-Entry
Bonds, see "DESCRIPTION OF THE BONDS -- Book-Entry Bonds" in the Prospectus.
 
PAYMENTS ON PLEDGED MORTGAGES; ACCOUNTS
 
     On or prior to the Closing Date, the Master Servicer will establish and
maintain or cause to be established and maintained a separate account or
accounts for the collection of payments remitted by the Servicers on the Pledged
Mortgages (the "Bond Account"). On the Closing Date, the Bond Trustee will
establish an account (the "Distribution Account"), which will be maintained with
the Bond Trustee in trust for the benefit of the Bondholders and the Insurer.
Prior to each Payment Date, the Master Servicer will withdraw from the Bond
Account the Available Funds for such Payment Date and will deposit such amount
in the Distribution Account. The timing for the transfer of Available Funds from
the Bond Account to the Distribution Account will vary pursuant to the Master
Servicing Agreement for the Pledged Mortgages based on the Servicer therefor and
will range from the fifth Business Day prior to each Payment Date to the
immediately preceding Business Day. Funds credited to the Bond Account or the
Distribution Account may
 
                                      S-19
<PAGE>   20
 
be invested at the direction of the Company or the Master Servicer,
respectively, solely for the benefit and at the risk of the Company or the
Master Servicer, respectively, in Permitted Investments, as defined in the
Master Servicing Agreement.
 
PAYMENTS
 
     Payments on the Bonds will be made by the Bond Trustee on the 4th day of
each month, or if such day is not a business day, on the first business day
thereafter, commencing in August 1997 (each, a "Payment Date"), to the persons
in whose names such Bonds are registered at the close of business on the Record
Date with respect to such Payment Date.
 
     Payments on each Payment Date will be made by check mailed to the address
of the person entitled thereto as it appears on the applicable bond register or,
in the case of a Bondholder who holds Bonds with an aggregate initial Principal
Balance of $1,000,000 or more and who has so notified the Bond Trustee in
writing in accordance with the Indenture, by wire transfer in immediately
available funds to the account of such Bondholder at a bank or other depository
institution having appropriate wire transfer facilities; provided, however, that
the final payment in retirement of the Bonds will be made only upon presentment
and surrender of such Bonds at the Corporate Trust Office of the Bond Trustee.
 
     "Available Funds" for the Payment Date will generally be equal to the sum
of (i) the aggregate amount of scheduled payments on the Pledged Mortgages due
on the related Due Date and received by the Master Servicer on or prior to the
related Withdrawal Date (net of the related Servicing Fees), (ii) any amounts
representing miscellaneous fees and collections, including assumption fees
collected from Mortgagors, to the extent not paid to the Master Servicer or any
Servicer, and any amounts payable by the Master Servicer or the Company as
reimbursement of any investment losses, (iii) any unscheduled payments and
receipts on the Pledged Mortgages, received during the second calendar month
preceding the month of such Payment Date including all proceeds of any primary
mortgage guaranty insurance policies and any other insurance policies with
respect to the Pledged Mortgages, to the extent such proceeds are not applied to
the restoration of the related Mortgaged Property or released to the Mortgagor
in accordance with the applicable Servicer's or the Master Servicer's normal
servicing procedures (collectively, "Insurance Proceeds"), all other cash
amounts received and retained in connection with the liquidation of defaulted
Pledged Mortgages, by foreclosure or otherwise ("Liquidation Proceeds"), (in
each case, net of unreimbursed expenses incurred in connection with a
liquidation or foreclosure), all partial or full prepayments received during
such month and compensating interest paid by the applicable Servicer or Master
Servicer if and to the extent provided for by the Servicing Agreement or Master
Servicing Agreement, respectively, (iv) amounts received with respect to such
Payment Date as the purchase price in respect of a Defective Pledged Mortgage or
Delinquent Pledged Mortgage repurchased by Redwood Trust, or a Convertible
Pledged Mortgage repurchased as described under "SECURITY FOR THE
BONDS -- Convertible Mortgage Loans," or any Substitution Adjustment Amount in
respect of a Defective Pledged Mortgage that has been substituted for in lieu of
repurchase by Redwood Trust, and the proceeds of any purchase of a Pledged
Mortgage by a Servicer as a result of a breach of a representation, warranty or
covenant by such Servicer or of any other such purchase by a Servicer to the
extent otherwise required or permitted under the applicable Servicing Agreement,
and (v) all Advances made for such Payment Date in respect of the Pledged
Mortgages, in each case net of amounts reimbursable therefrom to the Master
Servicer or any Servicer for Advances made with respect to prior Payment Dates
and net of such amount as may be necessary to reimburse the Master Servicer or
the Bond Trustee for certain costs and expenses (including any indemnification
expenses) owed to either pursuant to the Master Servicing Agreement or the
Indenture but only up to an amount set forth in the Master Servicing Agreement
(the "Capped Amount"). With respect to any Payment Date, the "Due Date" is the
first day of the month preceding the month in which such Payment Date occurs;
the "Due Period" is the period beginning on the second day of the second
preceding calendar month and ending on the Due Date in the preceding calendar
month; and a "Withdrawal Date" is the date the Master Servicer transfers
Available Funds from the Bond Account to the Distribution Account.
 
     As more fully described below, the Available Funds for each Payment Date
will be distributed by the Bond Trustee at the direction of the Master Servicer
in the following order of priority, to the payment of the
 
                                      S-20
<PAGE>   21
 
following amounts for such Payment Date: first, the Bond Insurance Policy
premium, the fee payable to Redwood Trust under the Management Agreement and
second, the Interest Payment Amount to Bondholders, third, the amount of any
Bondholders' Interest Carryover, if applicable, to Bondholders, fourth, the
Basic Principal Payment Amount to Bondholders, fifth, the Insurer Reimbursement
Amount, to the Insurer, sixth, the Excess Cashflow Principal Amount to
Bondholders, seventh, such amount as may be necessary to reimburse either the
Master Servicer or the Bond Trustee for any amounts that would otherwise have
been payable to it pursuant to clause first, above, but were in excess of the
Capped Amount and eighth, any remaining amounts for such Payment Date to the
holder of the Investor Certificate. The amount of Available Funds for any
Payment Date after payment of the premium and management fee set forth in
clause, first, above, is referred to herein as the "Net Available Funds" for
such Payment Date.
 
INTEREST
 
     The Bond Interest Rate on each Class of Bonds for each Payment Date is
described herein under "Summary -- Bond Interest Rate." Notwithstanding such
description, if as of any Payment Date a default under the Bond Insurance Policy
exists and is continuing and the Class A-1 Interest Rate or Class A-2 Interest
Rate calculated as described under "SUMMARY -- Bond Interest Rate" for such
Payment Date exceeds the Weighted Average Net Mortgage Rate for the related Due
Period, then the Class A-1 Interest Rate or the Class A-2 Interest Rate, as the
case may be, for the related Interest Accrual Period will be equal to the
Weighted Average Net Mortgage Rate (unless such Payment Date would be the
seventh consecutive Payment Date on which at least one of the Bond Interest
Rates would be equal to the Weighted Average Net Mortgage Rate, in which case,
each Bond Interest Rate would be calculated as described under "SUMMARY -- Bond
Interest Rate" regardless of whether of the continuation of such Bond Insurance
Policy default). If the Class A-1 Interest Rate or the Class A-2 Interest Rate
for any Payment Date is based on the Weighted Average Net Mortgage Rate, the
excess of (a) the amount of interest on the Class A-1 Bonds or the Class A-2
Bonds that would have accrued in respect of the related Interest Accrual Period
had interest been calculated based on LIBOR or the Fed Funds Average Rate, as
the case may be (subject in each case to the applicable fixed-rate cap) over (b)
the amount of interest on the applicable Class of Bonds actually accrued in
respect of such Interest Accrual Period based on the Weighted Average Net
Mortgage Rate, such excess, together with the unpaid portion of any such excess
from prior Payment Dates (and interest accrued thereon at the applicable rate
calculated based on LIBOR or the Fed Funds Average Rate, as the case may be
(subject in each case to the applicable fixed-rate cap) is referred to as the
"Class A-1 Bondholders' Interest Carryover" or the "Class A-2 Bondholders'
Interest Carryover", respectively (collectively, the "Bondholders' Interest
Carryover"). Any Bondholders' Interest Carryover will be payable on the Payment
Date when incurred or on any subsequent Payment Date to the extent that the Net
Available Funds for such Payment Date are sufficient after distribution of the
Interest Payment Amount for each Class of Bonds, as described herein under
"-- Payments" above.
 
     On each Payment Date each Class of Bonds will be entitled to receive an
amount allocable to interest (the "Interest Payment Amount") equal to the sum of
(i) interest at the Bond Interest Rate for the related Interest Accrual Period
for such Class of Bonds on the then outstanding Principal Balance for such Class
immediately prior to such Payment Date, and (ii) the sum of the amounts, if any,
by which the amount described in clause (i) above on each prior Payment Date
exceeded the amount actually distributed as interest on such Class of Bonds on
such prior Payment Dates and not subsequently distributed, together with, to the
extent permitted by applicable law, interest on the amount described in clause
(ii) at the related Bond Interest Rate. If the amount of Net Available Funds on
any Payment Date is insufficient to make the Interest Payment Amount for each
Class of Bonds, and the Insurer fails to make payments pursuant to the terms of
the Bond Insurance Policy, any such shortfall shall be allocated pro rata among
the Class A-1 and Class A-2 Bonds in proportion to the respective Interest
Payment Amounts for such Class for such Payment Date. With respect to each
Payment Date, the "Interest Accrual Period" will be the period commencing on the
immediately preceding Payment Date (or, in the case of the first Interest
Accrual Period, commencing on the Closing Date) and ending on the date
immediately preceding such Payment Date.
 
                                      S-21
<PAGE>   22
 
     Accrued interest to be paid on any Payment Date will be calculated on the
basis of the then outstanding Principal Balance for such Class immediately prior
to such Payment Date. Interest will be calculated and payable on the basis of a
360-day year divided into twelve 30-day months.
 
     LIBOR RATE DETERMINATION
 
     On the second business day prior to the commencement of each Interest
Accrual Period after the initial Initial Accrual Period for the Class A-1 Bonds
(each a "LIBOR Rate Determination Date"), the Master Servicer will determine
LIBOR.
 
     "LIBOR" means, as of any LIBOR Rate Determination Date, the rate for
deposits in United States dollars for a period equal to the relevant Interest
Accrual Period (commencing to the first day of such Interest Accrual Period)
which appears in the Telerate Page 3750 as of 11:00 a.m., London time, on such
date. If such rate does not appear on Telerate Page 3750, the rate for that day
will be determined on the basis of the rates at which deposits in United States
dollars are offered by the Reference Banks at approximately 11:00 a.m., London
time, on that day to prime banks in the London interbank market for a period
equal to the relevant Interest Accrual Period (commencing on the first day of
such Interest Accrual Period). The Master Servicer will request the principal
London office of each of the Reference Banks to provide a quotation of its rate.
If at least two such quotations are provided, the rate for that day will be the
arithmetic mean of the quotations. If fewer than two quotations are provided as
requested, the rate for that day will be the arithmetic mean of the rates quoted
by major banks in The City of New York, selected by the Master Servicer, at
approximately 11:00 a.m., New York City time, on that day for loans in United
States dollars to leading European banks for a period equal to the relevant
Interest Accrual Period (commencing on the first day of such Interest Accrual
Period).
 
     "Telerate Page 3750" means the display page currently so designated on the
Dow Jones Telerate Service (or such other page as may replace that page on that
service for the purpose of displaying comparable rates or prices) and "Reference
Banks" means leading banks selected by the Trustee and engaged in transactions
in Eurodollar deposits in the international Eurocurrency market.
 
     The Class A-1 Interest Rate for the first Payment Date will equal 6.02844%
per annum.
 
     The establishment of LIBOR (or an alternative index) by the Master Servicer
and the Master Servicer's subsequent calculation of the Bond Interest Rate on
the Class A-1 Bonds for the Interest Accrual Period, in the absence of wilful
misconduct, bad faith or manifest error, will be final and binding. The Bond
Interest Rate on the Class A-1 Bonds for any applicable Interest Accrual Period
may be obtained by telephoning the Master Servicer at (410) 884-2000.
 
FED FUNDS AVERAGE RATE DETERMINATION
 
     The "Fed Funds Average Rate" for the Class A-2 Bonds, for any Interest
Accrual Period after the initial Interest Accrual Period and the related Payment
Date, will equal the sum of each day's Fed Funds Rate (as defined herein) during
the applicable Fed Funds Calculation Period, divided by the number of days in
such Fed Funds Calculation Period. The "Fed Funds Calculation Period" applicable
to each Interest Accrual Period will be the period commencing on the 25th of the
second month preceding such Interest Accrual Period and ending on the 24th day
of the month preceding such Interest Accrual Period. The Fed Funds Rate will
reset each Fed Funds Business Day other than the last Fed Funds Business Day of
each Fed Funds Calculation Period (each, a "Fed Funds Interest Reset Date"). The
Fed Funds Rate in effect on each day of each Fed Funds Calculation Period will
be (a) if such day is a Fed Funds Interest Reset Date, the Fed Funds Rate
determined as of such Fed Funds Business Day (each a "Fed Funds Interest
Determination Date"), or (b) if such day is not a Fed Funds Interest Reset Date,
the Fed Funds Rate in effect on the immediately preceding Fed Funds Interest
Reset Date. For purposes of calculating the Fed Funds Rate, a "Fed Funds
Business Day" is any day other than a Saturday or Sunday or a day on which
banking institutions in The City of New York are authorized or required by law,
regulation or executive order to close.
 
                                      S-22
<PAGE>   23
 
     The Master Servicer will determine the Fed Funds Average Rate for each
Interest Accrual Period after the initial Interest Accrual Period.
 
     The "Fed Funds Rate", with respect to a Fed Funds Interest Reset Date,
means (in the following order of priority):
 
          (a) the rate with respect to the related Fed Funds Interest
     Determination Date (expressed as a percentage per annum) that appears
     opposite the caption "Federal Funds Effective" on Telerate Page 120 (as
     defined below) as of 11:00 a.m., New York City time on such Fed Funds
     Interest Reset Date;
 
          (b) if such rate does not appear on Telerate Page 120 as of 11:00
     a.m., New York City time, on such Fed Funds Interest Reset Date, then the
     Fed Funds Rate with respect to such Fed Funds Interest Reset Date will be
     the rate with respect to the related Fed Funds Interest Determination Date
     (expressed as a percentage per annum) that appears on Reuters Screen NYAA
     Page (as defined below) as of 11:00 a.m., New York City time, on such Fed
     Funds Interest Reset Date;
 
          (c) if such rate does not appear on Reuters Screen NYAA Page as of
     11:00 a.m., New York City time, on such Fed Funds Interest Reset Date, then
     the Master Servicer will request three leading brokers of Federal Funds
     transactions in The City of New York to provide the rate (expressed as a
     percentage per annum) for the last transaction in overnight Federal Funds
     arranged by such broker on the related Fed Funds Interest Determination
     Date. If rates are provided by such three brokers, then the Fed Funds Rate
     with respect to such Fed Funds Interest Reset Date will be the arithmetic
     mean (rounded to the nearest one hundred-thousandth of one percentage point
     with five one-millionths of one percentage point rounded upwards) of such
     rates; and
 
          (d) if fewer than three such rates are provided, then the Fed Funds
     rate with respect to such Fed Funds Interest Reset Date will be the Fed
     Funds Rate for the preceding Fed Funds Interest Reset Date (or, in the case
     of the first Fed Funds Interest Reset Date, the immediately preceding Fed
     Funds Business Day on which a rate appeared on Telerate Page 120 as
     described in (a) above).
 
     If a rate that initially appears on Telerate Page 120 or Reuters Screen
NYAA Page, as the case may be, as of 11:00 a.m., New York City Time, on the
applicable Fed Funds Interest Reset Date is superseded on Telerate Page 120 or
Reuters Screen NYAA Page, as the case may be, by a corrected rate before 12:00
noon, New York City time, on such Fed Funds Interest Reset Date, such corrected
rate as so superseded on the applicable page shall be the applicable rate for
calculating the applicable Fed Funds Rate for such Fed Funds Interest
Determination Date.
 
     "Reuters Screen NYAA Page" means the display designated as page "Reuters
Screen NYAA Page" on the Reuters Monitor Money Rates Service (or such other page
selected by the Master Servicer as may replace the NYAA page on that service for
the purpose of displaying Federal Funds rates).
 
     "Telerate Page 120" means the display designated as "Page 120" on the Dow
Jones Telerate Service (or such other page selected by the Master Servicer as
may replace Page 120 on that service for the purpose of displaying daily Federal
Funds rates).
 
     All percentages resulting from a calculation with respect to the Fed Funds
Average Rate or the Bond Interest Rate on the Class A-2 Bonds based on the Fed
Funds Average Rate for any Interest Accrual Period will be rounded to the
nearest one hundred-thousandth of a percentage point, with five one-millionths
of a percentage point rounded upwards (e.g., 9.876545% (or .09876545) would be
rounded to 9.87655% (or .0987655)), and all dollar amounts used in or resulting
from such calculation will be rounded to the nearest cent, with one-half cent
rounded upwards.
 
     The Class A-2 Interest Rate for the first Payment Date will equal 6.04% per
annum.
 
     All certificates, communications, opinions, determinations, calculations,
quotations and decisions given, expressed, made or obtained for the purpose of
calculating the Fed Funds Rate, the Fed Funds Average Rate or the Bond Interest
Rate on the Class A-2 Bonds based on the Fed Funds Rate for any Interest Accrual
 
                                      S-23
<PAGE>   24
 
Period by the Master Servicer shall (in the absence of wilful misconduct, bad
faith or manifest error) be final and binding. The Bond Interest Rate on the
Class A-2 Bonds for any applicable Interest Accrual Period may be obtained by
telephoning the Master Servicer at (410) 884-2000.
 
PRINCIPAL
 
     On each Payment Date, the "Principal Payment Amount" will equal the sum for
such Payment Date of the Basic Principal Amount, the Excess Cash Flow Principal
Amount, if any, and the amount of any Insured Payment made with respect to any
Subordination Deficit. The Principal Payment Amount will be distributed as
principal of the Class A-1 and Class A-2 Bonds on a pro rata basis according to
the relative Principal Balances thereof. In no event will the Principal Payment
Amount with respect to any Payment Date be greater than the then outstanding
Bond Principal Balance of the Bonds.
 
     The "Basic Principal Amount" for any Payment Date will be equal to the
lesser of (a) the Net Available Funds remaining after distribution of the
Interest Payment Amount and any Bondholders' Interest Carryover for such Payment
Date, (b) the Principal Distributable Amount for such Payment Date and (c) the
amount necessary, if any, to reduce the Bond Principal Balance to the Targeted
Principal Balance for such Payment Date.
 
     The "Principal Distributable Amount" for any Payment Date will be equal to
the sum of:
 
          (i) the principal portion of all scheduled monthly payments on the
     Pledged Mortgages received or Advanced (as defined herein) on the Pledged
     Mortgages with respect to the related Due Date;
 
          (ii) the principal portion of all proceeds received with respect to
     such Payment Date of (x) the repurchase of a Defective Pledged Mortgage
     (or, in the case of a substitution, certain amounts representing a
     principal adjustment) or a Delinquent Pledged Mortgage by Redwood Trust,
     (y) the repurchase by the applicable person of a Convertible Pledged
     Mortgage upon conversion or (z) any Pledged Mortgage purchased by the
     applicable Servicer to the extent required or permitted under the
     applicable Servicing Agreement, during the preceding calendar month; and
 
          (iii) the principal portion of all other unscheduled collections
     received during the second preceding calendar month (or deemed to be
     received during such month) (including, without limitation, full and
     partial principal prepayments made by the respective Mortgagors,
     Liquidation Proceeds and Insurance Proceeds), to the extent not distributed
     in the preceding month.
 
     The "Targeted Principal Balance" for any Payment Date will mean the Bond
Principal Balance that is equal to (x) the Pool Principal Balance with respect
to such Payment Date minus (y) the Specified Overcollateralization Amount for
such Payment Date.
 
     The "Specified Overcollateralization Amount" will be an amount to be
determined pursuant to the Master Servicing Agreement. For each Payment Date,
the Specified Overcollateralization Amount will adjust pursuant to the
parameters set forth in the Master Servicing Agreement and such parameters may
themselves be amended without the consent of the Bondholders or the Bond Trustee
by agreement of the Issuer and the Insurer with the advice of tax counsel.
 
     The "Excess Cash Flow Principal Amount" for any Payment Date will be equal
to the lesser of (i) the Net Monthly Excess Cashflow, if any, for such Payment
Date and (ii) the amount necessary, if any, after application of the Basic
Principal Amount for such Payment Date, to reduce the Bond Principal Balance to
the Targeted Principal Balance for such Payment Date. The "Net Monthly Excess
Cashflow" for any Payment Date is equal to the amount of Net Available Funds, if
any, remaining after payment of (i) the Interest Payment Amount, (ii) the amount
of any Bondholders' Interest Carryover, (iii) the Basic Principal Payment Amount
and (iv) the Insurer Reimbursement Amount. "Insurer Reimbursement Amount"
equals, as of any Payment Date, the sum of (i) all amounts previously paid by
the Insurer under the Bond Insurance Policy which have not previously been
reimbursed, (ii) all other amounts due to the Insurer under the Insurance
Agreement, other than the insurance premium and (iii) interest on the foregoing
at the Late Payment Rate (as defined in the Insurance Agreement).
 
                                      S-24
<PAGE>   25
 
     The circumstances under which an Insured Payment with respect to any
Subordination Deficit may be made are described under "Overcollateralization
Provisions -- Overcollateralization and the Bond Insurance Policy" and "Bond
Insurance Policy" below.
 
INVESTOR CERTIFICATE PAYMENT
 
     No payments shall be made on the Investor Certificate on any Payment Date
on which funds available to pay principal on the Bonds are insufficient to
reduce the Bond Principal Balance to the Targeted Principal Balance, i.e., at
any time at which the Overcollateralization Amount is less than the Specified
Overcollateralization Amount or on which any Insurer Reimbursement Amount
remains outstanding. Conversely, on any Payment Date on which Net Available
Funds remain after payment of the amount, if any, required to reduce the Bond
Principal Balance to the Targeted Principal Balance for such Payment Date,
reimbursement to the Insurer of the Insurer Reimbursement Amount and, if
applicable, the payment of any Bondholders' Interest Carryover, and the payment
of costs and expenses to the Master Servicer and the Bond Trustee, respectively,
in excess of the respective Capped Amount such remaining Net Available Funds
shall be distributed to the holder of the Investor Certificate, which shall
initially be the Company. Any amounts so distributed shall have been released
from the lien of the Indenture and shall no longer be available to make payments
on the Bonds or to the Insurer.
 
OVERCOLLATERALIZATION PROVISIONS
 
     OVERCOLLATERALIZATION RESULTING FROM CASHFLOW STRUCTURE
 
     As described under "-- Principal," above, after the Closing Date, principal
distributions on the Bonds will be made on each Payment Date, to the extent of
funds available therefor, in amounts up to the amount necessary to maintain the
Overcollateralization Amount at a level equal to the Specified
Overcollateralization Amount.
 
     The Indenture provides that, on any Payment Date, all unscheduled
collections on account of principal with respect to Mortgage Loans during the
second calendar month preceding the calendar month in which such Payment Date
occurs will be distributed on the Bonds on such Payment Date. If any Pledged
Mortgage becomes a Liquidated Mortgage, the Liquidation Proceeds related thereto
and allocated to principal may be less than the principal balance of the related
Pledged Mortgage; the amount of any such insufficiency is generally defined as a
"Realized Loss." The principal balance of any Mortgage Loan after it becomes a
Liquidated Mortgage Loan shall equal zero. The Indenture does not contain any
rule which requires that the amount of any Realized Loss be distributed to the
Bondholders on the Payment Date which immediately follows the event of loss;
i.e., the Indenture does not require the current recovery of losses by
Bondholders. However, the occurrence of a Realized Loss will reduce the
Overcollateralization Amount and may therefore increase the required principal
distribution of the Bonds to the extent that such reduction causes the
Overcollateralization Amount to be less than the Specified Overcollateralization
Amount. The effect of the foregoing is to allocate losses to
overcollateralization by reducing payments on the Pledged Mortgages which the
holder of the Investor Certificate would otherwise receive.
 
     OVERCOLLATERALIZATION AND THE BOND INSURANCE POLICY
 
     The "Subordination Deficit" with respect to a Payment Date is the amount,
if any, by which (x) the aggregate Bond Principal Balance of the Bonds as of
such Payment Date, and following the making of all payments to be made on such
Payment Date (except for any payment to be made as to principal from proceeds of
the Bond Insurance Policy), exceeds (y) the Pool Principal Balance with respect
to such Payment Date. The Indenture requires the Bond Trustee to make a claim
for an Insured Payment under the Bond Insurance Policy not later than the second
Business Day prior to any Payment Date as to which the Bond Trustee has
determined that a Subordination Deficit will occur for the purpose of applying
the proceeds of such Insured Payment as a payment of principal to the Holders of
the Bonds on such Payment Date. Investors in the Bonds should realize that,
under extreme loss or delinquency scenarios, they may temporarily receive no
payments of principal.
 
                                      S-25
<PAGE>   26
 
EXCESS SPREAD
 
     "Excess Spread" refers to the positive spread that may exist between the
Weighted Average Net Mortgage Rate and the weighted average of the Bond Interest
Rates. Whether at any time any such positive spread exists will depend on a
variety of factors, including the relationship of the movements in the indices
applicable to the Pledged Mortgages and those applicable to the Bonds, over
which no prediction can be made or assurance given.
 
STATED MATURITY
 
     The Stated Maturity for the Bonds is the date determined by the Company
which the 25th Payment Date immediately following the latest maturity date of
any Pledged Mortgage. The Stated Maturity of the Bonds is May 4, 2029. See
"DESCRIPTION OF THE BONDS -- Weighted Average Life of the Bonds" and "SECURITY
FOR THE BONDS" herein and in the Prospectus.
 
OPTIONAL PURCHASE OF DELINQUENT PLEDGED MORTGAGES
 
     Redwood Trust may, at its option, purchase from the Issuer any Pledged
Mortgage which is delinquent in payment by 60 days or more (each, a "Delinquent
Pledged Mortgage"). Any such purchase will be at a price equal to 100% of the
Stated Principal Balance of such Pledged Mortgage plus accrued interest thereon
at the applicable Mortgage Rate from the date through which interest was last
paid by the related Mortgagor or advanced to the first day of the month prior to
the month in which such amount is to be distributed.
 
WEIGHTED AVERAGE LIVES OF THE BONDS
 
     The weighted average life of a Bond is determined by (a) multiplying the
amount of the reduction, if any, of the Principal Balance of such Bond on each
Payment Date by the number of years from the date of issuance to such Payment
Date, (b) summing the results and (c) dividing the sum by the aggregate amount
of the reductions in Principal Balance of such Bond referred to in clause (a).
 
     For a discussion of the factors which may influence the rate of payments
(including prepayments) of the Pledged Mortgages, see "RISK FACTORS -- Yield,
Prepayment and Maturity Risks" herein and "RISK FACTORS -- Prepayment and Yield
Considerations; Reinvestment Risk" in the Prospectus.
 
     In general, the weighted average lives of the Bonds will be shortened if
the level of prepayments of principal of the Pledged Mortgages increases.
However, the weighted average lives of the Bonds will depend upon a variety of
other factors, including the timing of changes in such rate of principal
payments on the Pledged Mortgages. See "DESCRIPTION OF THE BONDS -- Principal"
herein.
 
     The interaction of the foregoing factors may have different effects on the
Bonds at different times during the life of such Bonds. Accordingly, no
assurance can be given as to the weighted average life of the Bonds. For an
example of how the weighted average lives of the Bonds may be affected at
various constant Prepayment Assumptions, see the Decrement Tables below.
 
REDEMPTION
 
     The Bonds may be redeemed in whole, but not in part, at the Issuer's
option, on any Payment Date on or after the earlier of (a) seven years after the
Closing Date and (b) the Payment Date after which the Pool Principal Balance
with respect to such Payment Date, is 35% or less of the Initial Pool Principal
Balance, at a redemption price equal to 100% of the unpaid Bond Principal
Balance, plus accrued and unpaid interest thereon at the Bond Interest Rate for
each such Class of Bonds, plus all amounts due to the Insurer pursuant to the
Insurance Agreement (the "Redemption Price"). In addition, the Redemption Price
would include any then outstanding Bondholders' Interest Carryover Shortfalls.
If the Issuer does not exercise its option to redeem the Bonds on the first
Payment Date on which it is permitted to do so, on the next succeeding Payment
Date, (a) the Class A-1 Interest Rate will be increased for the remainder of the
life of the Class A-1 Bonds to the lesser of (i) a per annum floating rate equal
to LIBOR for the related Interest Accrual Period plus 0.76% and (ii) 10.38% per
annum and (b) the Class A-2 Interest Rate will be increased for the
 
                                      S-26
<PAGE>   27
 
remainder of the life of the Class A-2 Bonds to the lesser of (i) a per annum
floating rate equal to the Fed Funds Average Rate for the related Interest
Accrual Period plus 0.92% and (ii) 10.38% per annum. At the option of the
Issuer, such an optional redemption of the Bonds can be effected without
retiring such Bonds so that the Issuer has the ability to own or resell such
Bonds. If the Issuer decides to effect an optional redemption without retiring
the Bonds, the increase in the stated margin over the applicable index and the
lifecap will not be applied. Upon redemption and retirement of the Bonds the
collateral securing the Bonds will be released from the lien of the Indenture.
 
     The Bonds will be subject to mandatory redemption and retirement by the
Issuer at the Redemption Price in the event that the Master Servicer or the
Insurer exercises its option to purchase all of the remaining Pledged Mortgages.
Such option may be exercised by the Master Servicer (or if the Master Servicer
fails to exercise such option, by the Insurer) on any Payment Date after the
Payment Date with respect to which the Pool Principal Balance is equal to 10% or
less of the Initial Pool Principal Balance at a price determined pursuant to the
Master Servicing Agreement, which price shall not be less than the amount
necessary to redeem the Bonds at the Redemption Price, plus all amounts due to
the Insurer pursuant to the Insurance Agreement, provided, however, that the
Master Servicer or Insurer will notify the Issuer of the intent to exercise the
option and the Issuer will have 90 days during which it may exercise its right
to sell the remaining Pledged Mortgages and mandatorily redeem the Bonds.
 
     Notice of any redemption by the Issuer must be given by the Issuer to the
Bond Trustee not less than 30 days prior to the redemption date and must be
mailed by the Issuer or the Bond Trustee to affected Bondholders at least ten
days prior to the redemption date.
 
     See "DESCRIPTION OF THE BONDS -- Optional Redemption" in the Prospectus.
 
BOND INSURANCE POLICY
 
     The following information regarding the Bond Insurance Policy has been
supplied by MBIA Insurance Corporation (the "Insurer") for inclusion in this
Prospectus Supplement.
 
     The Insurer, in consideration of the payment of the premium and subject to
the terms of the Bond Insurance Policy, thereby unconditionally and irrevocably
guarantees to any Owner (as defined below) that an amount equal to each full and
complete Insured Payment (as defined below) will be received by the Bond
Trustee, or its successor, as trustee for the Owners, on behalf of the Owners
from the Insurer, for distribution by the Bond Trustee to each Owner of each
Owner's proportionate share of the Insured Payment. The Insurer's obligations
under the Bond Insurance Policy with respect to a particular Insured Payment
shall be discharged to the extent funds equal to the applicable Insured Payment
are received by the Bond Trustee whether or not such funds are properly applied
by the Bond Trustee. Insured Payments shall be made only at the time set forth
in the Bond Insurance Policy and no accelerated Insured Payments shall be made
regardless of any acceleration of the Bonds, unless such acceleration is at the
sole option of the Insurer.
 
     Notwithstanding the foregoing paragraph, the Bond Insurance Policy does not
cover shortfalls, if any, attributable to the liability of the Issuer or the
Bond Trustee for withholding taxes, if any (including interest and penalties in
respect of any such liability).
 
     The Insurer will pay any Insured Payment that is a Preference Amount (as
described below) on the Business Day following receipt on a Business Day by the
Fiscal Agent (as described below) of (i) a certified copy of the order requiring
the return of a preference payment, (ii) an opinion of counsel satisfactory to
the Insurer that such order is final and not subject to appeal, (iii) an
assignment in such form as is reasonably required by the Insurer, irrevocably
assigning to the Insurer all rights and claims of the Owner relating to or
arising under the Bonds against the debtor which made such preference payment or
otherwise with respect to such preference payment and (iv) appropriate
instruments to effect the appointment of the Insurer as agent for such Owner in
any legal proceeding related to such preference payment, such instruments being
in a form satisfactory to the Insurer, provided that if such documents are
received after 12:00 noon New York City time on such Business Day, they will be
deemed to be received on the following Business Day. Such payments shall be
disbursed to the receiver or trustee in bankruptcy named in the final order of
the court exercising
 
                                      S-27
<PAGE>   28
 
jurisdiction on behalf of the Owner and not to any Owner directly unless such
Owner has returned principal or interest paid on the Bonds to such receiver or
trustee in bankruptcy, in which case such payment shall be disbursed to such
Owner.
 
     The Insurer will pay any other amount payable under the Bond Insurance
Policy no later than 12:00 noon, New York City time, on the later of the Payment
Date on which the related Deficiency Amount is due or the second Business Day
following receipt in New York, New York on a Business Day by State Street Bank
and Trust Company, N.A., as Fiscal Agent for the Insurer or any successor fiscal
agent appointed by the Insurer (the "Fiscal Agent") of a Notice (as described
below); provided that if such Notice is received after 12:00 noon New York City
time on such Business Day, it will be deemed to be received on the following
Business Day. If any such Notice received by the Fiscal Agent is not in proper
form or is otherwise insufficient for the purpose of making claim under the Bond
Insurance Policy it shall be deemed not to have been received by the Fiscal
Agent for purposes of this paragraph, and the Insurer or the Fiscal Agent, as
the case may be, shall promptly so advise the Bond Trustee and the Bond Trustee
may submit an amended Notice.
 
     Insured Payments due under the Bond Insurance Policy unless otherwise
stated therein will be disbursed by the Fiscal Agent to the Bond Trustee on
behalf of the Owners by wire transfer of immediately available funds in the
amount of the Insured Payment less, in respect of Insured Payments related to
Preference Amounts, any amount held by the Bond Trustee for the payment of such
Insured Payment and legally available therefor.
 
     The Fiscal Agent is the agent of the Insurer only and the Fiscal Agent
shall in no event be liable to Owners for any acts of the Fiscal Agent or any
failure of the Insurer to deposit, or cause to be deposited, sufficient funds to
make payments due under the Bond Insurance Policy.
 
     Subject to the terms of the Indenture, the Insurer shall be subrogated to
the rights of each Owner to receive payments under the Bonds to the extent of
any payment by the Insurer under the Bond Insurance Policy.
 
     As used in the Bond Insurance Policy, the following terms shall have the
following meanings:
 
          "Agreement" means the Master Servicing Agreement dated as of June 1,
     1997, among the Issuer, the Master Servicer and the Bond Trustee, as
     trustee, without regard to any amendment or supplement thereto unless such
     amendment or supplement has been approved in writing by the Insurer.
 
          "Business Day" means any day other than a Saturday, a Sunday or a day
     on which the Insurer or banking institutions in the State of Maryland and
     The City of New York or in the city in which the corporate trust office of
     the Bond Trustee under the Agreement is located are authorized or obligated
     by law or executive order to close.
 
          "Deficiency Amount" means (A) for any Payment Date prior to the Stated
     Maturity, an amount equal to the sum of (i) the excess, if any, of the
     Interest Payment Amount over the Net Available Funds for such Payment Date
     and (ii) the Subordination Deficit, if any; (B) for the Stated Maturity, an
     amount equal to the sum of (i) the excess, if any, of the Interest Payment
     Amount over the Net Available Funds for such Payment Date and (ii) the
     excess, if any, of the Bond Principal Balance of the Bonds over Net
     Available Funds not used to pay the Interest Payment Amount for such Stated
     Maturity; and (C) for any date on which the acceleration or redemption of
     the Bonds has been directed or consented to by the Insurer pursuant to the
     Agreement, an amount equal to the excess, if any, of the sum of the Bond
     Principal Balance of the Bonds, together with accrued and unpaid interest
     thereon through the date of payment of such accelerated or redeemed Bonds,
     over the Net Available Funds for such Payment Date.
 
          "Insured Payment" means, (i) as of any Payment Date any Deficiency
     Amount and (ii) any Preference Amount.
 
          "Notice" means the telephonic or telegraphic notice, promptly
     confirmed in writing by telecopy substantially in the form of Exhibit A
     attached to the Bond Insurance Policy, the original of which is
     subsequently delivered by registered or certified mail, from the Bond
     Trustee or the Master Servicer as
 
                                      S-28
<PAGE>   29
 
     agent of the Bond Trustee, specifying the Insured Payment which shall be
     due and owing on the applicable Payment Date.
 
          "Owner" means each Bondholder (as defined in the Agreement) who, on
     the applicable Payment Date, is entitled under the terms of the applicable
     Bonds, to payment thereunder.
 
          "Preference Amount" means any amount previously distributed to an
     Owner on the Bonds that is recoverable and sought to be recovered as a
     voidable preference by a trustee in bankruptcy pursuant to the United
     States Bankruptcy Code (11 U.S.C.), as amended from time to time, in
     accordance with a final nonappealable order of a court having competent
     jurisdiction.
 
     Capitalized terms used in the Bond Insurance Policy and not otherwise
defined in the Bond Insurance Policy shall have the respective meanings set
forth in the Agreement as of the date of execution of the Bond Insurance Policy,
without giving effect to any subsequent amendment or modification to the
Agreement unless such amendment or modification has been approved in writing by
the Insurer.
 
     Any notice under the Bond Insurance Policy or service of process on the
Fiscal Agent may be made at the address listed below for the Fiscal Agent or
such other address as the Insurer shall specify in writing to the Bond Trustee
and Master Servicer.
 
     The notice address of the Fiscal Agent is 15th Floor, 61 Broadway, New
York, New York 10006, Attention: Municipal Registrar and Paying Agency, or such
other address as the Fiscal Agent shall specify to the Bond Trustee and the
Master Servicer in writing.
 
     The Bond Insurance Policy is being issued under and pursuant to, and shall
be construed under, the laws of the State of New York, without giving effect to
the conflict of laws principles thereof.
 
     The insurance provided by the Bond Insurance Policy is not covered by the
Property/Casualty Insurance Security Fund specified in Article 76 of the New
York Insurance Law.
 
     The Bond Insurance Policy is not cancelable for any reason. The premium on
the Bond Insurance Policy is not refundable for any reason including payment, or
provision being made for payment, prior to maturity of the Bonds.
 
     THE INSURER
 
     The Insurer is the principal operating subsidiary of MBIA Inc., a New York
Stock Exchange listed company. MBIA Inc. is not obligated to pay the debts of or
claims against the Insurer. The Insurer is domiciled in the State of New York
and licensed to do business in and is subject to regulation under the laws of
all 50 states, the District of Columbia, the Commonwealth of Puerto Rico, the
Commonwealth of the Northern Mariana Islands, the Virgin Islands of the United
States and the Territory of Guam. The Insurer has two European branches, one in
the Republic of France and the other in the Kingdom of Spain. New York has laws
prescribing minimum capital requirements, limiting classes and concentrations of
investments and requiring the approval of policy rates and forms. State laws
also regulate the amount of both the aggregate and individual risks that may be
insured, the payment of dividends by the Insurer, changes in control and
transactions among affiliates. Additionally, the Insurer is required to maintain
contingency reserves on its liabilities in certain amounts and for certain
periods of time.
 
     The consolidated financial statements of the Insurer, a wholly owned
subsidiary of MBIA Inc., and its subsidiaries as of December 31, 1996 and
December 31, 1995 and for each of the three years in the period ended December
31, 1996, prepared in accordance with generally accepted accounting principles,
included in the Annual Report on Form 10-K of MBIA Inc. for the year ended
December 31, 1996 and the consolidated financial statements of the Insurer and
its subsidiaries as of March 31, 1997 and for each of the three month periods
ending March 31, 1997 and March 31, 1996 included in the Quarterly Report on
Form 10-Q of MBIA Inc. for the period ending March 31, 1997 are hereby
incorporated by reference into this Prospectus Supplement and shall be deemed to
be a part hereof. Any statement contained in a document incorporated by
reference herein shall be modified or superseded for purposes of this Prospectus
Supplement to the extent that a statement contained herein or in any other
subsequently filed document which also is incorporated by
 
                                      S-29
<PAGE>   30
 
reference herein modifies or supersedes such statement. Any statement so
modified or superseded shall not be deemed, except as so modified or superseded,
to constitute a part of this Prospectus Supplement.
 
     All financial statements of the Insurer and its subsidiaries included in
documents filed by MBIA Inc. pursuant to Section 13(a), 13(c), 14 or 15(d) of
the Securities Exchange Act of 1934, as amended, subsequent to the date of this
Prospectus Supplement and prior to the termination of the offering of the Bonds
shall be deemed to be incorporated by reference into this Prospectus Supplement
and to be a part hereof from the respective dates of filing such documents.
 
     The tables below present selected financial information of the Insurer
determined in accordance with statutory accounting practices prescribed or
permitted by insurance regulatory authorities ("SAP") and generally accepted
accounting principles ("GAAP"):
 
<TABLE>
<CAPTION>
                                                                        SAP
                                                        ------------------------------------
                                                        DECEMBER 31, 1996     MARCH 31, 1997
                                                        -----------------     --------------
                                                            (AUDITED)          (UNAUDITED)
                                                                   (IN MILLIONS)
        <S>                                             <C>                   <C>
        Admitted Assets.............................         $ 4,476              $4,598
        Liabilities.................................           3,009               3,067
        Capital and Surplus.........................           1,467               1,531
</TABLE>
 
<TABLE>
<CAPTION>
                                                                        GAAP
                                                        ------------------------------------
                                                        DECEMBER 31, 1996     MARCH 31, 1997
                                                        -----------------     --------------
                                                            (AUDITED)          (UNAUDITED)
                                                                   (IN MILLIONS)
        <S>                                             <C>                   <C>
        Assets......................................         $ 5,066              $5,110
        Liabilities.................................           2,262               2,262
        Shareholder's Equity........................           2,804               2,848
</TABLE>
 
     Copies of the financial statements of the Insurer incorporated by reference
herein and copies of the Insurer's 1996 year-end audited financial statements
prepared in accordance with statutory accounting practices are available,
without charge, from the Insurer. The address of the Insurer is 113 King Street,
Armonk, New York 10504. The telephone number of the Insurer is (914) 273-4545.
 
     The Insurer does not accept any responsibility for the accuracy or
completeness of this Prospectus Supplement or any information or disclosure
contained herein, or omitted herefrom, other than with respect to the accuracy
of the information regarding the Bond Insurance Policy and Insurer set forth
under the headings "DESCRIPTION OF THE BONDS -- Bond Insurance Policy" and
" -- The Insurer". Additionally, the Insurer makes no representation regarding
the Bonds or the advisability of investing in the Bonds.
 
     Moody's Investors Service, Inc. rates the claims paying ability of the
Insurer "Aaa."
 
     Standard & Poor's Ratings Services, a division of The McGraw-Hill
Companies, Inc. rates the claims paying ability of the Insurer "AAA."
 
     Fitch Investors Service, L.P. rates the claims paying ability of the
Insurer "AAA."
 
     Each rating of the Insurer should be evaluated independently. The ratings
reflect the respective rating agency's current assessment of the
creditworthiness of the Insurer and its ability to pay claims on its policies of
insurance. Any further explanation as to the significance of the above ratings
may be obtained only from the applicable rating agency.
 
     The above ratings are not recommendations to buy, sell or hold the Bonds,
and such ratings may be subject to revision or withdrawal at any time by the
rating agencies. Any downward revision or withdrawal of any of the above ratings
may have an adverse effect on the market price of the Bonds. The Insurer does
not guaranty the market price of the Bonds nor does it guaranty that the ratings
on the Bonds will not be revised or withdrawn.
 
                                      S-30
<PAGE>   31
 
STRUCTURING ASSUMPTIONS
 
     Unless otherwise specified, the decrement tables in this Prospectus
Supplement has been prepared on the basis of the following assumed
characteristics of the Pledged Mortgages and the following additional
assumptions (collectively, the "Structuring Assumptions"): (i) the Pledged
Mortgage Pool consists of Pledged Mortgages with the following characteristics:
 
<TABLE>
<CAPTION>
                                                                REMAINING     ORIGINAL
                                                                 TERM TO       TERM TO
                    OUTSTANDING                                  STATED        STATED      NEXT INTEREST
                     PRINCIPAL      LOAN   GROSS    PERIODIC    MATURITY      MATURITY      ADJUSTMENT
      INDEX           BALANCE       RATE   MARGIN     CAPS     (IN MONTHS)   (IN MONTHS)       DATE
- -----------------  --------------   ----   ------   --------   -----------   -----------   -------------
<S>                <C>              <C>    <C>      <C>        <C>           <C>           <C>
One-Month LIBOR    $16,551,190.90   7.93%   2.27%        N/A           333           360      07/01/97
One-Year CMT        33,762,306.04   8.41    2.87       2.004%          309           360      07/01/97
One-Year CMT        34,837,351.02   8.51    2.86       2.000           313           359      08/01/97
One-Year CMT        30,124,161.27   8.39    2.87       2.000           311           360      09/01/97
One-Year CMT        25,092,267.54   7.71    2.82       1.997           321           360      10/01/97
One-Year CMT        27,371,921.95   8.08    2.84       1.994           318           360      11/01/97
One-Year CMT        20,839,011.15   8.40    2.79       1.990           307           360      12/01/97
One-Year CMT        19,944,824.02   8.32    2.81       1.987           310           360      01/01/98
One-Year CMT        14,200,617.21   8.24    2.79       2.000           304           358      02/01/98
One-Year CMT        20,476,087.10   8.46    2.83       2.000           308           360      03/01/98
One-Year CMT        53,497,067.32   8.38    2.88       2.000           313           359      04/01/98
One-Year CMT        58,590,838.50   8.64    2.90       2.000           318           360      05/01/98
One-Year CMT        50,728,113.79   8.40    2.88       2.000           315           360      06/01/98
One-Year CMT         1,038,169.75   7.44    2.85       2.000           347           360      05/01/99
One-Year CMT         5,053,506.24   7.87    2.90       2.000           348           360      06/01/99
One-Year CMT         8,893,301.11   7.68    2.91       2.000           349           360      07/01/99
One-Year CMT        15,056,599.72   7.24    2.85       2.000           348           358      08/01/99
One-Year CMT        12,882,711.10   7.48    2.85       2.000           351           360      09/01/99
One-Year CMT        10,473,801.32   7.24    2.86       2.000           352           360      10/01/99
One-Year CMT         3,407,434.95   7.00    2.84       2.000           353           360      11/01/99
One-Year CMT         1,403,906.45   7.00    2.90       2.000           354           360      12/01/99
Six-Month LIBOR      2,088,483.20   7.88    2.96       1.000           340           360      07/01/97
Six-Month LIBOR     13,059,947.89   7.64    2.90       1.000           341           360      08/01/97
Six-Month LIBOR     16,529,399.97   7.65    2.89       1.000           345           360      09/01/97
Six-Month LIBOR     24,661,355.91   7.06    2.83       1.000           350           360      10/01/97
Six-Month LIBOR      9,546,923.81   8.06    2.85       1.000           345           360      11/01/97
Six-Month LIBOR     12,939,115.97   7.62    2.84       1.000           343           360      12/01/97
</TABLE>
 
(ii) the Pledged Mortgages prepay at the specified CPR, (iii) no defaults in the
payment by Mortgagors of principal of and interest on the Pledged Mortgages are
experienced, (iv) for each Payment Date, the scheduled payments on the Pledged
Mortgages are received on the related Due Date, (v) there are no Net Interest
Shortfalls and prepayments represent prepayments in full of individual Pledged
Mortgages and are received during each Due Period with 30 days of interest
accrued thereon, (vi) the scheduled monthly payment for each Pledged Mortgage
has been calculated based on the assumed mortgage loan characteristics described
in item (i) above such that each such mortgage loan will amortize in amounts
sufficient to repay the principal balance of such assumed mortgage loan by its
remaining term to maturity, (vii) the initial Bond Principal Balance is as set
forth on the cover page hereof, (viii) interest accrues on the Bonds at the
interest rate described herein, (ix) payments in respect of the Bonds are
received in cash on the 4th day of each month commencing in the calendar month
following the Closing Date regardless of whether such day is a Business Day, (x)
the closing date of the sale of the Bonds is July 29, 1997, (xi) Redwood Trust
does not purchase or substitute for any Pledged Mortgage, (xii) the Issuer does
not redeem the Bonds as described herein under
 
                                      S-31
<PAGE>   32
 
"-- Redemption," and (xiii) the level of One-Year CMT remains constant at 5.53%,
the level of One-Month LIBOR remains constant at 5.6875% and the level of
Six-Month LIBOR remains constant at 5.85%. While it is assumed that each of the
Pledged Mortgages prepays at the specified CPR, this is not likely to be the
case. Moreover, discrepancies exist between the characteristics of the actual
Pledged Mortgages which will be delivered to the Bond Trustee and
characteristics of the Pledged Mortgages assumed in preparing the tables herein.
 
     Prepayments of mortgage loans commonly are measured relative to a
prepayment standard or model. The prepayment assumption model used in this
Prospectus Supplement is based on a Constant Prepayment Rate ("CPR"). CPR
represents a constant rate of prepayment on the Pledged Mortgages each month
relative to the aggregate outstanding principal balance of the Pledged
Mortgages. The Issuer does not make any representations about the
appropriateness of the CPR model.
 
DECREMENT TABLES
 
     The following tables indicate the percentages of the initial Principal
Balance that would be outstanding after each of the dates shown at various
levels of CPR and the corresponding weighted average lives of each Class of
Bonds. The tables have been prepared on the basis of the Structuring
Assumptions. It is not likely that (i) all of the Pledged Mortgages will have
the characteristics assumed, (ii) all of the Pledged Mortgages will prepay at
the rates specified in the tables or at any constant prepayment rate or (iii)
all of the Pledged Mortgages will prepay at the same rate. Moreover, the diverse
remaining terms to maturity of the Pledged Mortgages could produce slower or
faster principal payments than indicated in the tables at the specified constant
prepayment rates, even if the weighted average remaining term to maturity of the
Pledged Mortgages is consistent with the remaining terms to maturity of the
Pledged Mortgages specified in the Structuring Assumptions.
 
                                      S-32
<PAGE>   33
 
             PERCENT OF INITIAL BOND PRINCIPAL BALANCES OUTSTANDING
 
                             BONDS OUTSTANDING AS A
                    PERCENTAGE OF ORIGINAL PRINCIPAL AMOUNT
 
<TABLE>
<CAPTION>
                                       --------------------------------------------------------------------------
                DATE                    0% CPR     15% CPR    18% CPR    21% CPR    25% CPR    30% CPR    35% CPR
- -------------------------------------  --------    -------    -------    -------    -------    -------    -------
<S>                                    <C>         <C>        <C>        <C>        <C>        <C>        <C>
Initial..............................       100       100        100        100        100        100        100
July 4, 1998.........................        99        84         81         78         74         69         64
July 4, 1999.........................        98        70         65         60         54         47         41
July 4, 2000.........................        97        59         52         47         40         33         26
July 4, 2001.........................        95        49         42         36         30         22         17
July 4, 2002.........................        94        41         34         28         22         15         11
July 4, 2003.........................        92        34         28         22         16         11          7
July 4, 2004.........................        90        29         22         17         12          7          4
July 4, 2005.........................        88        24         18         13          9          5          2
July 4, 2006.........................        86        20         14         10          6          3          1
July 4, 2007.........................        84        16         11          8          4          2          1
July 4, 2008.........................        82        13          9          6          3          1          0
July 4, 2009.........................        79        11          7          4          2          1          0
July 4, 2010.........................        76         9          5          3          1          0          0
July 4, 2011.........................        73         7          4          2          1          0          0
July 4, 2012.........................        70         6          3          2          0          0          0
July 4, 2013.........................        66         5          2          1          0          0          0
July 4, 2014.........................        62         4          2          1          0          0          0
July 4, 2015.........................        58         3          1          0          0          0          0
July 4, 2016.........................        53         2          1          0          0          0          0
July 4, 2017.........................        48         1          0          0          0          0          0
July 4, 2018.........................        42         1          0          0          0          0          0
July 4, 2019.........................        36         1          0          0          0          0          0
July 4, 2020.........................        30         0          0          0          0          0          0
July 4, 2021.........................        23         0          0          0          0          0          0
July 4, 2022.........................        15         0          0          0          0          0          0
July 4, 2023.........................         8         0          0          0          0          0          0
July 4, 2024.........................         4         0          0          0          0          0          0
July 4, 2025.........................         2         0          0          0          0          0          0
July 4, 2026.........................         0         0          0          0          0          0          0
  Weighted Average Life (years)......
 
  To Maturity........................      18.0       5.3        4.5        3.8        3.2        2.6        2.2
  To Issuer's 35% Optional
    Redemption.......................       6.6       3.6        3.0        2.6        2.1        1.7        1.4
  To 10% Redemption..................      17.9       5.0        4.1        3.5        2.9        2.4        2.0
                                       --------    -------    -------    -------    -------    -------    -------
</TABLE>
 
                             SECURITY FOR THE BONDS
 
GENERAL
 
     The Bonds will be secured by assignments to the Bond Trustee of collateral
consisting of (i) the Pledged Mortgages, (ii) funds on deposit in the Bond
Account and the Distribution Account, (iii) the Issuer's rights under the Master
Servicing Agreement, (iv) the Issuer's rights under the Servicing Agreements,
(v) the Issuer's rights under the Mortgage Loan Purchase Agreement, and (vi) the
proceeds of all of the foregoing. In addition, the Bond Insurance Policy will be
issued to the Bond Trustee for the benefit of the Bondholders.
 
                                      S-33
<PAGE>   34
 
THE PLEDGED MORTGAGES
 
     The Bonds will be secured by a pool (the "Pledged Mortgage Pool") of
primarily 30-year conventional mortgage loans secured by first liens on one- to
four-family residential properties (each, a "Mortgaged Property"). None of the
Pledged Mortgages will be guaranteed by any governmental agency. All of the
Pledged Mortgages will have been deposited with the Issuer by the Company which,
in turn, will have acquired them from Redwood Trust pursuant to an agreement
(the "Mortgage Loan Purchase Agreement") between the Company, the Issuer and
Redwood Trust. All of the Pledged Mortgages will have been acquired by Redwood
Trust in the ordinary course of its business and substantially in accordance
with the underwriting criteria specified herein.
 
     Under the Mortgage Loan Purchase Agreement, Redwood Trust will make certain
representations, warranties and covenants to the Company relating to, among
other things, the due execution and enforceability of the Mortgage Loan Purchase
Agreement and certain characteristics of the Pledged Mortgages and, subject to
the limitations described below under "-- Assignment of Pledged Mortgages," will
be obligated to purchase or substitute a similar mortgage loan for any Pledged
Mortgage as to which there exists deficient documentation or an uncured material
breach of any such representation, warranty or covenant (a "Defective Pledged
Mortgage"). See "MORTGAGE LOAN PROGRAM -- Representations by Sellers;
Repurchases" in the Prospectus. Under the Deposit Trust Agreement, the Company
will assign all of its rights under the Mortgage Loan Purchase Agreement to the
Issuer. Under the Indenture, the Issuer will pledge all its right, title and
interest in and to such representations, warranties and covenants (including
Redwood Trust's purchase obligation) to the Bond Trustee for the benefit of the
Bondholders and the Insurer. The Issuer will make no representations or
warranties with respect to the Pledged Mortgages and will have no obligation to
repurchase or substitute for Defective Pledged Mortgages. The obligations of
Redwood Trust with respect to the Bonds are limited to Redwood Trust's
obligation to purchase or substitute for Defective Pledged Mortgages; provided,
however, that Redwood Trust will indemnify the Issuer and the Insurer for any
damages caused by the breach of either of the following two representations: (1)
none of the Pledged Mortgages are "consumer credit contracts" or "purchase money
loans" for goods or services as such terms are defined in 16 C.F.R. section
433.1 and (2) none of the Pledged Mortgages are "mortgages" as such term is
defined in 15 U.S.C. 1602(aa).
 
     Each Pledged Mortgage will bear interest at an adjustable Mortgage Rate.
The Mortgage Rate for each of the Pledged Mortgages will be based upon one of
three indices. Pledged Mortgages with an aggregate principal balance of
$447,673,997.55, representing 82.44% of the Initial Pool Principal Balance, have
Mortgage Rates based upon the weekly average yield on U.S. Treasury securities
adjusted to a constant maturity of one year, as published by the Federal Reserve
Board ("One-Year CMT"); Pledged Mortgages with an aggregate principal balance of
$78,825,226.75, representing 14.52% of the Initial Pool Principal Balance, have
Mortgage Rates based upon six-month LIBOR, as specified in the related Mortgage
Note ("Six-Month LIBOR"); and Pledged Mortgages with an aggregate principal
balance of $16,551,190.90, representing 3.05% of the Initial Pool Principal
Balance, have Mortgage Rates based upon the average of one-month LIBOR, as
specified in the related Mortgage Note ("One-Month LIBOR"). The Mortgage Rates
on Pledged Mortgages with an aggregate principal balance of $58,209,430.64,
representing 10.72% of the Initial Pool Principal Balance have a next rate
adjustment date ranging from May 1, 1999 to December 1, 1999.
 
     At origination, substantially all of the Pledged Mortgages had stated terms
to maturity of 30 years. Scheduled monthly payments made by the Mortgagors on
the Pledged Mortgages ("Scheduled Payments") either earlier or later than the
scheduled Due Dates thereof will not generally affect the amortization schedule
or the relative application of such payments to principal and interest. To
accommodate changes in the amount of interest that will accrue on the Principal
Balance of each Pledged Mortgage due to adjustment of the related Mortgage Rate,
the Scheduled Payment on such Pledged Mortgage will adjust (the "Payment Change
Date"): (i) annually, beginning either one year or three years after origination
with respect to those Pledged Mortgages which have Mortgage Rates based upon
One-Year CMT and One-Month LIBOR; and (ii) biannually, with respect to those
Pledged Mortgages which have Mortgage Rates based upon Six-Month LIBOR. For
Pledged Mortgages with a Six-Month LIBOR or One-Year CMT index, the adjusted
Scheduled
 
                                      S-34
<PAGE>   35
 
Payment will be equal to an amount necessary to amortize the pledged Mortgage in
equal monthly installments over its remaining term with interest at the related
Mortgage Rate effective during the month preceding the Payment Change Date. With
respect to the Pledged Mortgages which have a mortgage Rate based upon One-Month
LIBOR, representing 3.05% of the Initial Pool Principal Balance, the Mortgage
Rate adjusts monthly, while the Scheduled Payment adjusts annually (the "Neg-Am
Mortgages"), therefore the adjusted payment amount may not be sufficient to
amortize the pledged Neg-Am Mortgage over the remaining term of the loan in
equal installments. The portion of each Scheduled Payment on a Neg-Am Mortgage
attributable to interest and the portion attributable to principal, if any, may
vary from month to month. If an adjustment to the Mortgage Rate on a Neg-Am
Mortgage causes the amount of interest accrued in any month to exceed the
Scheduled Payment thereon, such excess will be added to the unpaid principal
balance of the Neg-Am Mortgage Rate as "Deferred Interest", resulting in
negative amortization. At no time during the term of the Neg-Am Mortgage may the
unpaid Principal Balance thereof exceed one hundred and ten percent (110%) of
the original Principal Balance. On any Due Date for which the related Scheduled
Payment would result in Deferred Interest causing the unpaid Principal Balance
of any such Neg-Am Mortgage to exceed such maximum amount, the Scheduled Payment
will be adjusted to an amount that will fully amortize such Neg-Am Mortgage over
its remaining term. Mortgagors may prepay their Pledged Mortgages at any time
without penalty.
 
     Each Pledged Mortgage with a Six-Month LIBOR index will bear interest at a
Mortgage Rate, subject to biannual adjustments on the first day of the month
specified in the related mortgage note, equal to the sum, rounded to the nearest
 1/8th of one percentage point (.125%), of (i) Six-Month LIBOR, calculated as
specified in the related Mortgage Note, and (ii) a fixed percentage amount
specified in the related Mortgage Note provided, however, that the Mortgage Rate
will not increase or decrease by more than 1.0 percentage point (1.00%).
 
     Pledged Mortgages with a One-Year CMT index will generally bear interest at
a Mortgage Rate, subject to annual adjustments on the first day of the month
specified in the related mortgage note (each such date, an "Adjustment Date"),
equal to the sum, rounded to the nearest  1/8th of one percentage point (.125%),
of (i) One-Year CMT as published by the Federal Reserve Board and most recently
available as of 45 days prior to each Adjustment Date and (ii) a fixed
percentage amount specified in the related Mortgage Note provided, however, that
the Mortgage Rate will not increase or decrease by more than 2.0 percentage
points (2.00%).
 
     Each Pledged Mortgage with a One-Month LIBOR index will bear interest at a
Mortgage Rate, subject to monthly adjustments on the Adjustment Date, equal to
the sum, rounded to the nearest  1/8th of one percentage point (.125%), of (i)
One-Month LIBOR as published in The Wall Street Journal and most recently
available as of the first business day of the month immediately preceding the
month in which the Interest Rate Adjustment Date occurs and (ii) a fixed
percentage amount specified in the related Mortgage Note. The mortgage payment
amount will only adjust every twelve months (each such date a "Payment
Adjustment Date") and, for certain Pledged Mortgages, may not increase by more
than 7.50 percent (7.50%) unless one or more of the following is true: (i) such
limitation to the mortgage payment amount would cause the unpaid principal
balance to exceed 110% of the original principal balance, (ii) the Payment
Adjustment Date is the fifth Payment Adjustment Date or subsequent fifth Payment
Adjustment Date thereafter, (iii) the Payment Adjustment Date is the final
Payment Adjustment Date.
 
     All of the Pledged Mortgages provide that over the life of the Pledged
Mortgage the Mortgage Rate will in no event increase by more than either the
Mortgage Rate fixed at origination plus a fixed number of percentage points
specified in the related Mortgage Note or another maximum interest rate as
specified in the related Mortgage Note (each such rate, the "Maximum Rate").
None of the Pledged Mortgages are subject to minimum Mortgage Rates. If the
Index ceases to be published or is otherwise unavailable, the Issuer will select
an alternative index according to the terms of the related Mortgage Note based
upon comparable information.
 
     Generally, the Pledged Mortgages contain due-on-sale provisions, subject to
applicable law and standard assumption clauses. Such Pledged Mortgages are, by
their terms, assumable in connection with a transfer of the related Mortgaged
Property if the proposed transferee submits certain information to the Servicer
required to enable it to evaluate the transferee's ability to repay the Pledged
Mortgage and if the Servicer reasonably
 
                                      S-35
<PAGE>   36
 
determines that the security for the Pledged Mortgage would not be impaired by
the assumption. See "RISK FACTORS" herein and in the Prospectus.
 
     None of the Pledged Mortgages are subject to buydown agreements.
 
     The "Loan-to-Value Ratio" of a Pledged Mortgage at any given time is a
fraction, expressed as a percentage, the numerator of which is the principal
balance of the related Pledged Mortgage at the date of determination and the
denominator of which is (a) in the case of a purchase, the lesser of the selling
price of the Mortgaged Property and its appraised value determined in an
appraisal obtained by the originator at origination of such Pledged Mortgage, or
(b) in the case of a refinance, the appraised value of the Mortgaged Property at
the time of such refinance. No assurance can be given that the value of any
Mortgaged Property has remained or will remain at the level that existed on the
appraisal or sales date. If residential real estate values generally or in a
particular geographic area decline, the Loan-to-Value Ratios might not be a
reliable indicator of the rates of delinquencies, foreclosures and losses that
could occur with respect to such Pledged Mortgages.
 
     The Pledged Mortgages had an original weighted average Loan-to-Value Ratio
of 75.87%. At origination, 22.04% of the Pledged Mortgages had Loan-to-Value
Ratios in excess of 80%, 97.14% of which had private mortgage insurance. At the
Cut-off Date, the Pledged Mortgages had a weighed average Loan-to-Value Ratio of
72.42% and 20% of the Pledged Mortgages had Loan-to-Value Ratios in excess of
80%. No Pledged Mortgage has a Loan-to-Value Ratio at origination of more than
100%. Each Pledged Mortgage with a Loan-to-Value Ratio at origination of greater
than 80% that is insured is covered by a primary mortgage insurance policy (each
a "Primary Mortgage Insurance Policy") issued by a mortgage insurance company
acceptable to the Federal National Mortgage Association ("FNMA"), the Federal
Home Loan Mortgage Corporation ("FHLMC") or any nationally recognized
statistical rating organization, which policy provides coverage of a portion of
the original principal balance of the related Pledged Mortgage equal to the
product of the original principal balance thereof and a fraction, the numerator
of which is no less than the excess of the original principal balance of the
related Pledged Mortgage over 75% of the lesser of the appraised value and
selling price of the related Mortgage Property and the denominator of which is
the original principal balance of the related Pledged Mortgage. No such Primary
Mortgage Insurance Policy will be required with respect to any such Pledged
Mortgage after the date on which the related Loan-to-Value Ratio is 80% or less
or, based on a new appraisal, the principal balance of such Pledged Mortgage
represents 80% or less of the new appraised value. See "-- Underwriting
Standards" herein.
 
     The interest payable on the Pledged Mortgages with respect to any Payment
Date will be reduced by the amount of "Net Interest Shortfalls" for such Payment
Date, if any. With respect to any Payment Date, the "Net Interest Shortfall" is
equal to (i) the amount of interest which would otherwise have been received
with respect to any Pledged Mortgage that was the subject of a Relief Act
Reduction and (ii) any Net Prepayment Interest Shortfalls and Uncovered
Prepayment Interest Shortfalls as each is described under "SERVICING OF THE
PLEDGED MORTGAGES -- Adjustment to Certain Servicing Fees in Connection with
Certain Prepaid Pledged Mortgages; Uncovered Prepayment Interest Shortfalls"
herein. A "Relief Act Reduction" is a reduction in the amount of monthly
interest payment on a Pledged Mortgage pursuant to the Soldiers' and Sailors'
Civil Relief Act of 1940. See "CERTAIN LEGAL ASPECTS OF PLEDGED MORTGAGES --
Soldiers and Sailors' Civil Relief Act" in the Prospectus.
 
     Each Pledged Mortgage was originated on or after April 11, 1984.
 
     The latest stated maturity date of any Pledged Mortgage is May 1, 2027. The
earliest stated maturity date of any Pledged Mortgage is February 1, 2002.
 
     As of the Cut-off Date, no Pledged Mortgage was delinquent more than 59
days.
 
                                      S-36
<PAGE>   37
 
     The following information sets forth in tabular format certain information
describing the Pledged Mortgages as of the Cut-off Date and may not total 100%
due to rounding. Other than with respect to rates of interest, percentages are
stated by Stated Principal Balance of the Initial Pledged Mortgages as of the
Cut-off Date and have been rounded in order to total 100%.
 
<TABLE>
<CAPTION>
                                  ORIGINAL LOAN-TO-VALUE RATIOS(1)
        ------------------------------------------------------------------------------------
                                                                 AGGREGATE
                                               NUMBER OF         PRINCIPAL        PERCENT OF
               ORIGINAL LOAN-TO-VALUE           PLEDGED           BALANCE          MORTGAGE
                      RATIOS(%)                MORTGAGES        OUTSTANDING          POOL
        -------------------------------------  ----------     ---------------     ----------
        <S>                                    <C>            <C>                 <C>
         0.01- 10.00.........................         1       $    210,029.87         0.04%
        20.01- 30.00.........................         7          1,143,193.76         0.21
        30.01- 40.00.........................        26          6,077,222.13         1.12
        40.01- 50.00.........................        45         11,636,461.31         2.14
        50.01- 60.00.........................       104         28,027,163.38         5.16
        60.01- 70.00.........................       301         84,043,238.89        15.48
        70.01- 80.00.........................     1,168        292,333,936.69        53.83
        80.01- 90.00.........................       462        107,753,407.09        19.84
        90.01-100.00.........................        89         11,825,762.08         2.18
                                                  -----       ---------------       ------
                  Total......................     2,203       $543,050,415.20       100.00%
                                                  =====       ===============       ======
</TABLE>
 
- ---------------
 
(1) The weighted average original Loan-to-Value Ratio of the Pledged Mortgages
    of the Cut-off Date is approximately 75.90%.
 
<TABLE>
<CAPTION>
                                   ORIGINAL TERMS TO MATURITY(1)
        ------------------------------------------------------------------------------------
                                                                 AGGREGATE
                                               NUMBER OF         PRINCIPAL        PERCENT OF
                  ORIGINAL TERM TO              PLEDGED           BALANCE          MORTGAGE
                  MATURITY (MONTHS)            MORTGAGES        OUTSTANDING          POOL
        -------------------------------------  ----------     ---------------     ----------
        <S>                                    <C>            <C>                 <C>
        180..................................         2       $    397,008.14         0.07%
        240..................................         3            344,814.47         0.06
        300..................................         2            258,809.32         0.05
        348..................................         2            127,574.28         0.02
        360..................................     2,194        541,922,208.99        99.79
                                                  -----       ---------------       ------
                  Total......................     2,203       $543,050,415.20       100.00%
                                                  =====       ===============       ======
</TABLE>
 
- ---------------
 
(1) As of the Cut-off Date, the weighted average remaining term to maturity of
    the Pledged Mortgages is approximately 360 months.
 
<TABLE>
<CAPTION>
                               STATED REMAINING TERMS TO MATURITY(1)
        ------------------------------------------------------------------------------------
                                                                 AGGREGATE
                  STATED REMAINING             NUMBER OF         PRINCIPAL        PERCENT OF
                  TERMS TO MATURITY             PLEDGED           BALANCE          MORTGAGE
                      (MONTHS)                 MORTGAGES        OUTSTANDING          POOL
        -------------------------------------  ----------     ---------------     ----------
        <S>                                    <C>            <C>                 <C>
          1- 60..............................         1       $    135,776.11         0.03%
         61-120..............................         2            279,300.52         0.05
        121-180..............................         2             69,414.02         0.01
        181-240..............................        64          6,627,979.61         1.22
        241-300..............................       331         74,335,522.44        13.69
        301-360..............................     1,803        461,602,422.50        85.00
                                                  -----       ---------------       ------
                  Total......................     2,203       $543,050,415.20       100.00%
                                                  =====       ===============       ======
</TABLE>
 
- ---------------
 
(1) As of the Cut-off Date, the weighted average remaining term to maturity of
    the Pledged Mortgages is approximately 323 months.
 
                                      S-37
<PAGE>   38
 
<TABLE>
<CAPTION>
                                    NUMBER OF MONTHS OUTSTANDING
        ------------------------------------------------------------------------------------
                                                                 AGGREGATE
                                               NUMBER OF         PRINCIPAL        PERCENT OF
                  NUMBER OF MONTHS              PLEDGED           BALANCE          MORTGAGE
                     OUTSTANDING               MORTGAGES        OUTSTANDING          POOL
        -------------------------------------  ----------     ---------------     ----------
        <S>                                    <C>            <C>                 <C>
          1- 12..............................       411       $127,527,706.82        23.48%
         13- 24..............................        87         22,179,183.97         4.08
         25- 36..............................       644        147,098,769.47        27.09
         37- 48..............................       597        148,871,205.45        27.41
         49- 60..............................        75         18,651,347.10         3.43
         61- 72..............................        65         17,570,604.93         3.24
         73- 84..............................        48         11,891,666.12         2.19
         85- 96..............................       125         28,350,915.95         5.22
         97-108..............................        44          7,621,745.78         1.40
        109-120..............................        41          6,762,777.36         1.25
        121 and above........................        66          6,524,492.25         1.20
                                                  -----       ---------------       ------
                  Total......................     2,203       $543,050,415.20       100.00%
                                                  =====       ===============       ======
</TABLE>
 
<TABLE>
<CAPTION>
                           CURRENT PLEDGED MORTGAGE PRINCIPAL BALANCES(1)
        ------------------------------------------------------------------------------------
                                                                 AGGREGATE
                  RANGE OF CURRENT             NUMBER OF         PRINCIPAL        PERCENT OF
                  PLEDGED MORTGAGE              PLEDGED           BALANCE          MORTGAGE
                 PRINCIPAL BALANCES            MORTGAGES        OUTSTANDING          POOL
        -------------------------------------  ----------     ---------------     ----------
        <S>                                    <C>            <C>                 <C>
        $      0.01-   50,000.00.............        42       $  1,458,746.47         0.27%
          50,000.01- 100,000.00..............       198         15,488,916.23         2.85
         100,000.01- 150,000.00..............       203         24,890,203.80         4.58
         150,000.01- 200,000.00..............       176         31,648,011.09         5.83
         200,000.01- 250,000.00..............       685        154,377,148.68        28.43
         250,000.01- 300,000.00..............       388        105,299,572.91        19.39
         300,000.01- 350,000.00..............       199         64,382,230.25        11.86
         350,000.01- 400,000.00..............       112         41,787,841.12         7.70
         400,000.01- 450,000.00..............        67         28,389,498.67         5.23
         450,000.01- 500,000.00..............        48         22,551,917.06         4.15
         500,000.01- 550,000.00..............        24         12,630,431.68         2.33
         550,000.01- 600,000.00..............        23         13,272,078.47         2.44
         600,000.01- 650,000.00..............        21         13,180,365.11         2.43
         650,000.01- 700,000.00..............         4          2,687,024.37         0.49
         700,000.01- 750,000.00..............         2          1,429,674.63         0.26
         750,000.01- 800,000.00..............         5          3,951,865.43         0.73
         850,000.01- 900,000.00..............         1            899,903.42         0.17
         900,000.01- 950,000.00..............         3          2,774,949.08         0.51
        $950,000.01-1,000,000.00.............         2          1,950,036.73         0.36
                                                  -----       ---------------       ------
                  Total......................     2,203       $543,050,415.20       100.00%
                                                  =====       ===============       ======
</TABLE>
 
- ---------------
 
(1) As of the Cut-off Date, the average current principal balance of the Pledged
    Mortgages is approximately $246,505.00.
 
                                      S-38
<PAGE>   39
 
<TABLE>
<CAPTION>
                                     CURRENT MORTGAGE RATES(1)
        ------------------------------------------------------------------------------------
                                                                 AGGREGATE
                                                NUMBER OF        PRINCIPAL        PERCENT OF
                  CURRENT MORTGAGE               PLEDGED          BALANCE          MORTGAGE
                      RATES(%)                  MORTGAGES       OUTSTANDING          POOL
        ------------------------------------    ---------     ---------------     ----------
        <S>                                     <C>           <C>                 <C>
         5.001- 5.500.......................          6       $  1,648,198.55         0.30%
         5.501- 6.000.......................         56         19,370,202.06         3.57
         6.001- 6.500.......................         56         18,330,740.58         3.38
         6.501- 7.000.......................        100         27,511,919.87         5.07
         7.001- 7.500.......................        135         42,310,850.93         7.79
         7.501- 8.000.......................        101         27,103,916.50         4.99
         8.001- 8.500.......................      1,021        238,815,801.86        43.98
         8.501- 9.000.......................        718        165,128,303.39        30.41
         9.001- 9.500.......................          7          2,483,485.68         0.46
        10.001-10.500.......................          2            315,206.51         0.06
        11.001-11.500.......................          1             31,789.27         0.01
                                                  -----       ---------------       ------
                  Total.....................      2,203       $543,050,415.20       100.00%
                                                  =====       ===============       ======
</TABLE>
 
- ---------------
 
(1) As of the Cut-off Date, the weighted average Mortgage Rate of the Pledged
    Mortgages is approximately 8.13% per annum.
 
<TABLE>
<CAPTION>
                                            LOAN PURPOSE
        ------------------------------------------------------------------------------------
                                                                 AGGREGATE
                                                NUMBER OF        PRINCIPAL        PERCENT OF
                                                 PLEDGED          BALANCE          MORTGAGE
                    LOAN PURPOSE                MORTGAGES       OUTSTANDING          POOL
        ------------------------------------    ---------     ---------------     ----------
        <S>                                     <C>           <C>                 <C>
        Cash Out............................        139       $ 36,411,032.70         6.70%
        Construction........................          6          2,266,333.11         0.42
        Purchase............................      1,361        315,731,817.76        58.14
        Refinance...........................        697        188,641,231.63        34.74
                                                  -----       ---------------       ------
                  Total.....................      2,203       $543,050,415.20       100.00%
                                                  =====       ===============       ======
</TABLE>
 
                                      S-39
<PAGE>   40
 
<TABLE>
<CAPTION>
                           STATE DISTRIBUTION OF MORTGAGED PROPERTIES(1)
        ------------------------------------------------------------------------------------
                                                                 AGGREGATE
                                                NUMBER OF        PRINCIPAL        PERCENT OF
                                                 PLEDGED          BALANCE          MORTGAGE
                       STATE                    MORTGAGES       OUTSTANDING          POOL
        ------------------------------------    ---------     ---------------     ----------
        <S>                                     <C>           <C>                 <C>
        Alaska..............................          1       $    312,563.02         0.06%
        Alabama.............................          5          1,141,317.99         0.21
        Arkansas............................          1            300,146.75         0.06
        Arizona.............................         47         12,475,638.31         2.30
        California..........................        813        222,825,280.94        41.03
        Colorado............................         51         12,033,647.30         2.22
        Connecticut.........................         66         15,154,910.10         2.79
        District of Columbia................         20          4,357,934.90         0.80
        Delaware............................          3            506,677.20         0.09
        Florida.............................        115         21,617,210.86         3.98
        Georgia.............................         50         12,228,721.32         2.25
        Hawaii..............................         24          8,658,888.95         1.59
        Idaho...............................          2            440,622.90         0.08
        Illinois............................         96         23,471,132.95         4.32
        Indiana.............................         20          3,499,829.52         0.64
        Kansas..............................         15          2,034,245.58         0.37
        Kentucky............................          5          1,382,670.07         0.25
        Louisiana...........................          3            551,524.03         0.10
        Massachusetts.......................         63         15,457,146.23         2.85
        Maryland............................        170         38,089,476.51         7.01
        Maine...............................          1             62,623.03         0.01
        Michigan............................         32          8,922,988.53         1.64
        Minnesota...........................         19          4,945,117.47         0.91
        Missouri............................         16          2,955,518.15         0.54
        Mississippi.........................          1            114,982.94         0.02
        Montana.............................          1            264,257.01         0.05
        North Carolina......................         39         10,218,038.40         1.88
        New Hampshire.......................          4            550,822.13         0.10
        New Jersey..........................         77         15,038,667.55         2.77
        New Mexico..........................          9          1,967,742.56         0.36
        Nevada..............................         28          8,304,346.05         1.53
        New York............................         69         14,419,151.80         2.66
        Ohio................................         31          7,121,547.65         1.31
        Oklahoma............................          1            331,524.97         0.06
        Oregon..............................         13          2,811,710.56         0.52
        Pennsylvania........................         21          4,073,160.94         0.75
        Rhode Island........................          2            425,130.26         0.08
        South Carolina......................         18          5,049,851.12         0.93
        Tennessee...........................         11          2,980,949.15         0.55
        Texas...............................         80         18,719,719.13         3.45
        Utah................................         26          6,601,995.83         1.22
        Virginia............................         93         20,167,405.88         3.71
        Vermont.............................          2            698,668.02         0.13
        Washington..........................         34          8,627,388.98         1.59
        Wisconsin...........................          3            650,069.41         0.12
        Wyoming.............................          2            487,452.25         0.09
                                                  -----       ---------------       ------
                  Total.....................      2,203       $543,050,415.20       100.00%
                                                  =====       ===============       ======
</TABLE>
 
                                      S-40
<PAGE>   41
 
<TABLE>
<CAPTION>
                                         OCCUPANCY TYPES(1)
        ------------------------------------------------------------------------------------
                                                                 AGGREGATE
                                               NUMBER OF         PRINCIPAL        PERCENT OF
                                                PLEDGED           BALANCE          MORTGAGE
                   OCCUPANCY TYPE              MORTGAGES        OUTSTANDING          POOL
        -------------------------------------  ----------     ---------------     ----------
        <S>                                    <C>            <C>                 <C>
        Investment...........................        87       $  9,342,316.62         1.72%
        Primary Home.........................     2,047        515,284,548.20        94.89
        Second Home..........................        69         18,423,550.38         3.39
                                                  -----       ---------------       ------
                  Total......................     2,203       $543,050,415.20       100.00%
                                                  =====       ===============       ======
</TABLE>
 
- ---------------
 
(1) Based upon representations of the related Mortgagors at the time of
    origination.
 
<TABLE>
<CAPTION>
                                           PROPERTY TYPE
        ------------------------------------------------------------------------------------
                                                                 AGGREGATE
                                               NUMBER OF         PRINCIPAL        PERCENT OF
                                                PLEDGED           BALANCE          MORTGAGE
                    PROPERTY TYPE              MORTGAGES        OUTSTANDING          POOL
        -------------------------------------  ----------     ---------------     ----------
        <S>                                    <C>            <C>                 <C>
        2-4 family...........................        13       $  3,010,891.81         0.55%
        Condo................................       111         19,652,691.03         3.62
        PUD..................................       271         74,280,066.98        13.68
        Single family........................     1,800        444,602,337.19        81.87
        Townhouse............................         8          1,504,428.19         0.28
                                                  -----       ---------------       ------
                  Total......................     2,203       $543,050,415.20       100.00%
                                                  =====       ===============       ======
</TABLE>
 
<TABLE>
<CAPTION>
                                     MAXIMUM MORTGAGE RATES(1)
        ------------------------------------------------------------------------------------
                                                                 AGGREGATE
                                               NUMBER OF         PRINCIPAL        PERCENT OF
                                                PLEDGED           BALANCE          MORTGAGE
                  LIFETIME CAPS(%)             MORTGAGES        OUTSTANDING          POOL
        -------------------------------------  ----------     ---------------     ----------
        <S>                                    <C>            <C>                 <C>
         9.001- 9.500........................         8       $  1,769,825.11         0.33%
         9.501-10.000........................        61         16,635,335.95         3.06
        10.001-10.500........................       134         34,788,318.13         6.41
        10.501-11.000........................       249         60,219,149.91        11.09
        11.001-11.500........................       260         67,910,897.80        12.51
        11.501-12.000........................       387         97,127,563.58        17.89
        12.001-12.500........................       268         69,048,658.46        12.71
        12.501-13.000........................       291         71,432,318.41        13.15
        13.001-13.500........................       150         38,516,278.79         7.09
        13.501-14.000........................       131         30,590,010.84         5.63
        14.001-14.500........................        97         21,641,024.47         3.99
        14.501-15.000........................       104         19,929,593.40         3.67
        15.001-15.500........................        33          7,652,708.26         1.41
        15.501-16.000........................        18          3,730,667.81         0.69
        16.001-16.500........................         9          1,290,430.34         0.24
        16.501-17.000........................         5            580,598.27         0.11
        17.001-17.500........................         2            121,489.29         0.02
        17.501-18.000........................         1             65,546.38         0.01
                                                  -----       ---------------       ------
                  Total......................     2,203       $543,050,415.20       100.00%
                                                  =====       ===============       ======
</TABLE>
 
- ---------------
 
(1) As of the Cut-off Date, the weighted average maximum margin of the Pledged
    Mortgages is approximately 12.21% per annum.
 
                                      S-41
<PAGE>   42
 
<TABLE>
<CAPTION>
                                             MARGIN(1)
        ------------------------------------------------------------------------------------
                                                                 AGGREGATE
                                               NUMBER OF         PRINCIPAL        PERCENT OF
                                                PLEDGED           BALANCE          MORTGAGE
                      MARGIN(%)                MORTGAGES        OUTSTANDING          POOL
        -------------------------------------  ----------     ---------------     ----------
        <S>                                    <C>            <C>                 <C>
        0.501-1.000..........................         1       $    205,649.79         0.04%
        1.001-1.500..........................        10          2,385,430.74         0.44
        1.501-2.000..........................        20          6,106,237.95         1.12
        2.001-2.500..........................        36          3,327,281.51         0.61
        2.501-3.000..........................     2,067        513,131,312.03        94.49
        3.001-3.500..........................        62         16,322,312.47         3.01
        3.501-4.000..........................         5          1,256,984.20         0.23
        4.001-4.500..........................         2            315,206.51         0.06
                                                  -----       ---------------       ------
                  Total......................     2,203       $543,050,415.20       100.00%
                                                  =====       ===============       ======
</TABLE>
 
- ---------------
 
(1) As of the Cut-off Date, the weighted average margin of the Pledged Mortgages
    is approximately 2.84%.
 
<TABLE>
<CAPTION>
                                     MINIMUM MORTGAGE RATES(1)
        ------------------------------------------------------------------------------------
                                                                 AGGREGATE
                                               NUMBER OF         PRINCIPAL        PERCENT OF
                                                PLEDGED           BALANCE          MORTGAGE
                 LIFETIME FLOORS (%)           MORTGAGES        OUTSTANDING          POOL
        -------------------------------------  ----------     ---------------     ----------
        <S>                                    <C>            <C>                 <C>
        0.001-0.500..........................         3       $    462,562.80         0.09%
        0.501-1.000..........................         3            448,919.82         0.08
        1.001-1.500..........................        10          2,385,430.74         0.44
        1.501-2.000..........................        20          6,106,237.95         1.12
        2.001-2.500..........................        32          3,095,415.41         0.57
        2.501-3.000..........................     2,056        511,325,622.25        94.16
        3.001-3.500..........................        63         16,507,311.16         3.04
        3.501-4.000..........................         8          1,625,344.47         0.30
        4.001-4.500..........................         4            764,579.69         0.14
        4.501-5.000..........................         2            201,416.63         0.04
        6.001-6.500..........................         2            127,574.28         0.02
                                                  -----       ---------------       ------
                  Total......................     2,203       $543,050,415.20       100.00%
                                                  =====       ===============       ======
</TABLE>
 
- ---------------
 
(1) As of the Cut-off Date, the weighted average floor for the Pledged Mortgages
    is approximately 2.84% per annum.
 
<TABLE>
<CAPTION>
                                        PERIODIC RATE CAP(1)
        ------------------------------------------------------------------------------------
                                                                 AGGREGATE
                                               NUMBER OF         PRINCIPAL        PERCENT OF
                                                PLEDGED           BALANCE          MORTGAGE
                PERIODIC RATE CAP(%)           MORTGAGES        OUTSTANDING          POOL
        -------------------------------------  ----------     ---------------     ----------
        <S>                                    <C>            <C>                 <C>
        0.000................................        72       $ 16,613,699.88         3.06%
        1.000................................       277         79,439,896.08        14.63
        1.500................................         2            134,976.52         0.02
        2.000................................     1,850        446,790,519.64        82.27
        2.500................................         1             39,533.81         0.01
        6.000................................         1             31,789.27         0.01
                                                  -----       ---------------       ------
                  Total......................     2,203       $543,050,415.20       100.00%
                                                  =====       ===============       ======
</TABLE>
 
- ---------------
 
(1) As of the Cut-off Date the weighted average rate cap for the Pledged
    Mortgages is approximately 1.85%.
 
                                      S-42
<PAGE>   43
 
<TABLE>
<CAPTION>
                                            PAYMENT CAP
        ------------------------------------------------------------------------------------
                                                                 AGGREGATE
                                               NUMBER OF         PRINCIPAL        PERCENT OF
                                                PLEDGED           BALANCE          MORTGAGE
                     PAYMENT CAP               MORTGAGES        OUTSTANDING          POOL
        -------------------------------------  ----------     ---------------     ----------
        <S>                                    <C>            <C>                 <C>
        0.000................................     2,174       $534,738,322.02        98.47%
        7.500................................        29          8,312,093.18         1.53
                                                  -----       ---------------       ------
                  Total......................     2,203       $543,050,415.20       100.00%
                                                  =====       ===============       ======
</TABLE>
 
<TABLE>
<CAPTION>
                                            CONVERTIBLE
        ------------------------------------------------------------------------------------
                                                                 AGGREGATE
                                               NUMBER OF         PRINCIPAL        PERCENT OF
                                                PLEDGED           BALANCE          MORTGAGE
                     CONVERTIBLE               MORTGAGES        OUTSTANDING          POOL
        -------------------------------------  ----------     ---------------     ----------
        <S>                                    <C>            <C>                 <C>
        Non-convertible......................     1,726       $412,800,718.69        76.02%
        Convertible..........................       477        130,249,696.51        23.98
                                                  -----       ---------------       ------
                  Total......................     2,203       $543,050,415.20       100.00%
                                                  =====       ===============       ======
</TABLE>
 
<TABLE>
<CAPTION>
                                               INDEX
        ------------------------------------------------------------------------------------
                                                                 AGGREGATE
                                               NUMBER OF         PRINCIPAL        PERCENT OF
                                                PLEDGED           BALANCE          MORTGAGE
                        INDEX                  MORTGAGES        OUTSTANDING          POOL
        -------------------------------------  ----------     ---------------     ----------
        <S>                                    <C>            <C>                 <C>
        One-Month LIBOR......................        71       $ 16,551,190.90         3.05%
        One-Year CMT.........................     1,861        447,673,997.55        82.44
        Six-Month LIBOR......................       271         78,825,226.75        14.52
                                                  -----       ---------------       ------
                  Total......................     2,203       $543,050,415.20       100.00%
                                                  =====       ===============       ======
</TABLE>
 
<TABLE>
<CAPTION>
                                     NEXT RATE ADJUSTMENT DATE
        ------------------------------------------------------------------------------------
                                                                 AGGREGATE
                                                NUMBER OF        PRINCIPAL        PERCENT OF
                                                 PLEDGED          BALANCE          MORTGAGE
              NEXT RATE ADJUSTMENT DATE         MORTGAGES       OUTSTANDING          POOL
        --------------------------------------  ---------     ---------------     ----------
        <S>                                     <C>           <C>                 <C>
        July 1, 1997..........................      221       $ 52,401,980.14         9.65%
        August 1, 1997........................      205         47,897,298.91         8.82
        September 1, 1997.....................      197         46,653,561.24         8.59
        October 1, 1997.......................      194         49,753,623.45         9.16
        November 1, 1997......................      168         36,918,845.76         6.80
        December 1, 1997......................      148         33,778,127.12         6.22
        January 1, 1998.......................       91         19,944,824.02         3.67
        February 1, 1998......................       64         14,200,617.21         2.61
        March 1, 1998.........................       80         20,476,087.10         3.77
        April 1, 1998.........................      209         53,497,067.32         9.85
        May 1, 1998...........................      245         58,590,838.50        10.79
        June 1, 1998..........................      198         50,728,113.79         9.34
        May 1, 1999...........................        3          1,038,169.75         0.19
        June 1, 1999..........................       16          5,053,506.24         0.93
        July 1, 1999..........................       31          8,893,301.11         1.64
        August 1, 1999........................       47         15,056,599.72         2.77
        September 1, 1999.....................       38         12,882,711.10         2.37
        October 1, 1999.......................       33         10,473,801.32         1.93
        November 1, 1999......................       10          3,407,434.95         0.63
        December 1, 1999......................        5          1,403,906.45         0.26
                                                  -----       ---------------       ------
             Total............................    2,203       $543,050,415.20       100.00%
                                                  =====       ===============       ======
</TABLE>
 
                                      S-43
<PAGE>   44
 
ASSIGNMENT OF THE PLEDGED MORTGAGES
 
     Pursuant to the Indenture, the Issuer on the Closing Date will pledge,
transfer, assign, set over and otherwise convey without recourse to the Bond
Trustee in trust for the benefit of the Bondholders and the Insurer all right,
title and interest of the Issuer in and to each Pledged Mortgage and all right,
title and interest in and to all other assets included in the Collateral,
including all principal and interest received on or with respect to the Pledged
Mortgages, exclusive of principal and interest due on or prior to the Cut-off
Date.
 
     In connection with such transfer and assignment, the Issuer will deliver or
cause to be delivered to the Bond Trustee, or a custodian for the Bond Trustee,
among other things, the original promissory note (the "Mortgage Note") (and any
modification or amendment thereto) endorsed in blank without recourse, the
original instrument creating a first lien on the related Mortgaged Property (the
"Mortgage") with evidence of recording indicated thereon, an assignment in
recordable form of the Mortgage, the title policy with respect to the related
Mortgaged Property and, if applicable, all recorded intervening assignments of
the Mortgage and any riders or modifications to such Mortgage Note and Mortgage
(except for any such document not returned from the public recording office,
which will be delivered to the Bond Trustee as soon as the same is available to
the Issuer) (collectively, the "Mortgage File"). Assignments of the Pledged
Mortgages to the Bond Trustee (or its nominee) will be recorded in the
appropriate public office for real property records, except in states where, in
the opinion of local counsel, such recording is not required to protect the Bond
Trustee's interest in the Pledged Mortgages against the claim of any subsequent
transferee or any successor to or creditor of the Issuer; provided, however,
notwithstanding the delivery of any legal opinions, each assignment of mortgage
shall be recorded upon the earliest to occur of (i) the direction by the
Insurer, (ii) the occurrence of an event of default under the transaction
documents, or (iii) any bankruptcy, insolvency or foreclosure with respect to
the related mortgagor.
 
     The Bond Trustee will review or cause to be reviewed each Mortgage File
within 30 days of the Closing Date (or promptly after the Bond Trustee's receipt
of any document permitted to be delivered after the Closing Date) and if any
document in a Mortgage File is found to be missing or defective in a material
respect and the Issuer does not cure such defect within 30 days of notice
thereof from the Bond Trustee (or within such longer period not to exceed 30
days after the Closing Date as provided in the Mortgage Loan Purchase Agreement
in the case of missing documents not returned from the public recording office),
Redwood Trust will be obligated to purchase the related Defective Pledged
Mortgage. Rather than purchase the Defective Pledged Mortgage as provided above
or as required in the case of Defective Pledged Mortgage for which there is an
uncured material breach of a representation, warranty or covenant with respect
thereto as described under "-- The Pledged Mortgages" above, Redwood Trust may
remove such Defective Pledged Mortgage from the collateral (a "Deleted Pledged
Mortgage") and substitute in its place another mortgage loan (a "Replacement
Pledged Mortgage"). The Issuer expects that the above review of the Mortgage
Files will be performed for each file by one of two custodians that
collectively, will maintain custody of the Mortgage Files on behalf of the
Trustee. Any Replacement Pledged Mortgage generally will, on the date of
substitution, among other characteristics set forth in the Mortgage Loan
Purchase Agreement, (i) have a principal balance, after deduction of all
Scheduled Payments due in the month of substitution, not in excess of, and not
more than 20.0% less than, the Stated Principal Balance of the Deleted Pledged
Mortgage (the amount of any shortfall to be deposited in the Bond Account by
Redwood and held for distribution to the Bondholders on the related Payment Date
(a "Substitution Adjustment Amount")), (ii) have a Mortgage Rate not lower than,
and not more than 1.0% per annum higher than, that of the Deleted Pledged
Mortgage, (iii) have a current Loan-to-Value Ratio not higher than that of the
Deleted Pledged Mortgage, (iv) have a remaining term to maturity not greater
than (and not more than 36 months less than) that of the Deleted Pledged
Mortgage, and (v) comply with all of the representations and warranties set
forth in the Mortgage Loan Purchase Agreement as of the date of substitution.
This cure, purchase or substitution obligation constitutes the sole remedy
available to Bondholders or the Bond Trustee for omission of, or a material
defect in, a Pledged Mortgage document.
 
UNDERWRITING STANDARDS
 
     All of the Pledged Mortgages have been purchased by Redwood Trust in the
ordinary course of business directly from banks, savings and loan associations,
mortgage bankers and other mortgage loan originators
 
                                      S-44
<PAGE>   45
 
(each, an "Originator") or in the secondary market. Redwood Trust approves
individual institutions as eligible Originators after an evaluation of certain
criteria, including the Originator's mortgage origination and servicing
experience and financial stability. Each Originator and/or the entity from which
Redwood Trust purchased the Pledged Mortgages will represent and warrant that
all Pledged Mortgages originated and/or sold by it will have been underwritten
in accordance with standards consistent with those utilized by mortgage lenders
generally during the period of origination.
 
     Underwriting standards are applied by or on behalf of a lender to evaluate
the borrower's credit standing and repayment ability, and the value and adequacy
of the related Mortgaged Property as collateral. In general, a prospective
borrower applying for a loan is required to fill out a detailed application
designed to provide to the underwriting officer pertinent credit information. As
part of the description of the borrower's financial condition, the borrower
generally is required to provide a current list of assets and liabilities and a
statement of income and expense, as well as an authorization to apply for a
credit report which summarizes the borrower's credit history with local
merchants and lenders and any record of bankruptcy. In most cases, an employment
verification is obtained from an independent source (typically the borrower's
employer) which verification reports, among other things, the length of
employment with that organization, the current salary, and whether it is
expected that the borrower will continue such employment in the future. If a
prospective borrower is self-employed, the borrower may be required to submit
copies of signed tax returns. The borrower may also be required to authorize
verification of deposits at financial institutions where the borrower has demand
or savings accounts. See "MORTGAGE LOAN PROGRAM -- Underwriting Standards" in
the Prospectus.
 
     When Redwood Trust acquires a mortgage they have the borrower's credit
report reviewed. Generally, each credit report provides a credit score for the
borrower. The credit score is based upon the credit evaluation methodology
developed by Fair, Issac and Company ("FICO"), a consulting firm specializing in
creating default predictive models through a high number of variables
components. FICO scores generally range from 350 to 850 and are available from
three major credit bureaus: TRW, Equifax and Trans Union. These scores estimate,
on a relative basis, which loans are most likely to default in the future. Lower
scores imply higher default risk relative to a higher score. FICO scores are
empirically derived from historical credit bureau data and represent a numerical
weighing of a borrower's credit characteristics over a two-year period. A FICO
score is generated through the statistical analysis of a number of
credit-related characteristics or variables. Common characteristics include
number of credit lines (trade lines), payment history, past delinquencies,
severity of delinquencies, current levels of indebtedness, types of credit and
length of credit history. Attributes are the specific values of each
characteristic. A scorecard (the model) is created with weights or points
assigned to each attribute. An individual loan applicant's credit score is
derived by summing together the attribute weights for that applicant. For the
Pledged Mortgages, 19.55% have credit scores for the borrowers. The weighted
average borrower's FICO score for those Pledged Mortgages which have been scored
is 712.
 
     Redwood Trust only acquires mortgages which have not been more than thirty
days delinquent for more than two months during the 12 month period prior to
acquisition. Redwood Trust does not acquire any mortgages which have been more
than 60 days delinquent during the 12 month period prior to acquisition.
 
CONVERTIBLE MORTGAGE LOANS
 
     Approximately 24.00% of the Pledged Mortgages grant the related mortgagor
the option to convert the adjustable Mortgage Rate to a fixed rate (a
"Convertible Mortgage"). With respect to such Pledged Mortgage, subject to
notice, the mortgagor not being in default and the payment of a conversion fee,
a mortgagor generally has the option to convert the Mortgage Rate (i) during the
four year period commencing on the first Adjustment Date and ending on the fifth
Adjustment Date for One-Year CMT Pledged Mortgages which have a first Adjustment
Date one year after origination, (ii) during the four year period commencing on
the second Adjustment Date and ending on the tenth Adjustment Date for Six-Month
LIBOR Pledged Mortgages and (iii) on the first, second and third Adjustment
Dates for One-Year CMT Pledged Mortgages that have a first Adjustment Date three
years after origination.
 
     Upon the conversion of Convertible Mortgages from adjustable rate Pledged
Mortgages to fixed rate Pledged Mortgages (a "Converted Mortgage Loan"), certain
related Servicers servicing such Pledged
 
                                      S-45
<PAGE>   46
 
Mortgages, and in certain instances, Redwood Trust, will be obligated to
purchase such Pledged Mortgages, and with respect to the remaining Pledged
Mortgages, the Issuer will use reasonable efforts to cause any related
subservicer or another person to purchase such Pledged Mortgages, in each case
at a price (the "Purchase Price") equal to 100% of the Stated Principal Balance
of such Pledged Mortgage plus accrued interest thereon at the Mortgage Rate
applicable to such Pledged Mortgage immediately prior to such conversion date to
the first day of the month prior to the month in which the Purchase Price is to
be distributed to the Bondholders. A Pledged Mortgage converted to a fixed
Mortgage Rate will remain with the Issuer until repurchased by the applicable
person. Any failure to repurchase a Converted Mortgage Loan will not constitute
an Event of Default under the Indenture and will result in the inclusion of
fixed rate Pledged Mortgages held by the Issuer.
 
                       SERVICING OF THE PLEDGED MORTGAGES
 
THE MASTER SERVICER
 
     Norwest Bank Minnesota, N.A. will act as Master Servicer. The principal
master servicing offices of Norwest Bank Minnesota, N.A. are located at 11000
Broken Land Parkway, Columbia, Maryland.
 
     The Master Servicer will be responsible for certain bond administrative
functions and for monitoring the servicing of the Pledged Mortgages by the
Servicers under the Servicing Agreements. On the Closing Date, the Issuer will
be assigned the right to enforce the Servicing Agreements for the benefit of the
Bondholders and the Insurer. The Master Servicer shall be appointed as agent of
the Issuer to enforce the Servicing Agreements for the benefit of the
Bondholders and the Insurer.
 
SERVICING AGREEMENTS
 
     The Pledged Mortgages are comprised of seventeen separate pools of loans.
Ten of such pools are being serviced by Countrywide Homes Loans, Inc.
("Countrywide") pursuant to Countrywide's standard Servicing Agreement (the
"Countrywide Servicing Agreement"); five such pools are being serviced by
Residential Funding Corporation ("RFC") pursuant to five substantially similar
Servicing Agreements (the "RFC Servicing Agreements"); one pool is being
serviced by NationsBanc Mortgage Corporation ("NationsBanc") pursuant to a
Servicing Agreement (the "NationsBanc Servicing Agreement"); and one pool is
being subserviced by NationsBanc pursuant to a Servicing Agreement as to which
Main Street Mortgage, L.P. ("Main Street") is the servicer (the "Main Street
Servicing Agreement").
 
     COUNTRYWIDE SERVICING AGREEMENT. The aggregate principal balance as of the
Cut-Off Date of Pledged Mortgages covered by the Countrywide Servicing Agreement
was $404,537,206.22. Countrywide remits collections on the Pledged Mortgages due
to the owner thereof on the 18th day of each month or, if not a business day, on
the first business day thereafter. Countrywide is authorized (but not obligated)
to repurchase any Pledged Mortgages that are delinquent 91 or more days.
Countrywide may assign its servicing rights under the Countrywide Servicing
Agreement with the prior consent of the owner of the Pledged Mortgages, such
consent not to be unreasonably withheld.
 
     RFC SERVICING AGREEMENTS. The aggregate principal balance as of the Cut-Off
Date of Pledged Mortgages covered by the RFC Servicing Agreements was
$71,991,685.16. RFC remits collections on the Pledged Mortgages due to the owner
thereof on the 25th day of each month, or if not a business day, on the first
business day thereafter. On the business day next preceding the 20th day of each
month, RFC will notify the owner of the amount of principal and interest to be
remitted on the 25th day of the month. Upon 60 days prior notice, RFC may assign
its servicing rights under the RFC Servicing Agreements to a successor servicer
meeting the eligibility criteria therein set forth.
 
     NATIONSBANC SERVICING AGREEMENT. The aggregate principal balance as of the
Cut-Off Date of Pledged Mortgages covered by the NationsBanc Servicing Agreement
was $58,209,430.64. NationsBanc remits collections on the Pledged Mortgages due
to the owner thereof on the 18th day of the month or, if not a business day, on
the first business day thereafter. NationsBanc is obligated to use reasonable
best efforts to
 
                                      S-46
<PAGE>   47
 
notify the owner prior to the tenth calendar day of the month of the amount of
principal and interest to be remitted on the 18th day of such month. The
NationsBanc Servicing Agreement does not address the ability of NationsBanc to
assign its servicing rights thereunder.
 
     MAIN STREET SERVICING AGREEMENT. The aggregate principal balance as of the
Cut-Off Date of Pledged Mortgages covered by the Main Street Servicing Agreement
was $8,312,093.18. NationsBanc, as subservicer, remits collections on the
Pledged Mortgages due to the owner thereof on the 18th day of each month or, if
not a business day, on the first business day thereafter. Not later than the
10th calendar day each month, NationsBanc is required to deliver to the owner a
computer tape with loan level remittance data for such month's remittance. Main
Street may assign its servicing rights under the Main Street Servicing Agreement
with the consent of the owner of the Pledged Loans, each consent not to be
unreasonably withheld.
 
SERVICING AND COLLECTION PROCEDURES
 
     Servicing functions to be performed by the Servicers under the Servicing
Agreements include collection and remittance of principal and interest payments,
administration of mortgage escrow accounts, collection of certain insurance
claims and, if necessary, foreclosure. A Servicer may contract with subservicers
to perform some or all of the Servicer s servicing duties, but the Servicer will
not thereby be released from its obligations under its Servicing Agreement. When
used herein with respect to servicing obligations, the term Servicer includes
any such subservicer. The Master Servicer may perform certain supervisory
functions with respect to servicing by the Servicer directly or through an agent
or independent contractor.
 
     On or before the Closing Date, the Master Servicer will establish the Bond
Account into which each Servicer will remit collections on the mortgage loans
serviced by it (net of its related servicing compensation). Under each Servicing
Agreement, the Servicers deposit collections on the Pledged Mortgages into
custodial accounts established by them. Such accounts are required to be kept
segregated from operating accounts of the Servicer and to meet the eligibility
criteria set forth in the Servicing Agreement. Under certain Servicing
Agreements, amounts on deposit in the custodial account may be invested in
permitted investments as therein defined. Any losses resulting from such
investments are required to be reimbursed to the custodial account by the
applicable Servicer out of its own funds.
 
     In the event of a default by a Servicer under its Servicing Agreement, the
Master Servicer will have the right to remove the Servicer and will exercise
that right if it considers such removal to be in the best interest of the
Bondholders and the Insurer. In the event that the Master Servicer removes a
Servicer, the Master Servicer will act as successor Servicer under the related
Servicing Agreement or will appoint a successor Servicer acceptable to the
Insurer.
 
FORECLOSURE, DELINQUENCY AND LOSS EXPERIENCE
 
     The following table summarizes the delinquency, foreclosure and loss
experience, respectively, as of March 31, 1997 of the pools of Pledged Mortgages
which were owned by Redwood Trust on such date with an aggregate outstanding
balance of approximately $591,888,431.61. The table includes information on
mortgages which are not Pledged Mortgages and should not be considered as a
basis for assessing the likelihood, amount of severity of delinquency or losses
on the Pledged Mortgages, and no assurances can be given that the foreclosure,
delinquency and loss experience presented in the table below will be indicative
of such experience on the Pledged Mortgages in the future:
 
                                      S-47
<PAGE>   48
 
                  FORECLOSURE, DELINQUENCY AND LOSS EXPERIENCE
                              AS OF MARCH 31, 1997
 
<TABLE>
<CAPTION>
                                                                NUMBER OF       PERCENTAGE
                                                                 PLEDGED        OF PLEDGED
                                                                MORTGAGES       MORTGAGES
                                                                ----------     ------------
        <S>                                                     <C>            <C>
        Total Number of Conventional Mortgage Loans in
          Portfolio...........................................     2,442
        Delinquent Mortgage Loans and Pending Foreclosures at
          Period End:
          30-59 days..........................................        52           2.13%
          60-89 days..........................................         4           0.16%
          90 days or more (excluding foreclosures)............         2           0.08%
          Total Delinquencies.................................        58           2.37%
          Foreclosures pending................................         3           0.12%
          REO.................................................         1           0.04%
          Total delinquencies, foreclosures pending and REO...        62           2.54%
          Net Loss............................................         1           0.04%
</TABLE>
 
     There can be no assurance that factors beyond the Servicers' control, such
as national or local economic conditions or downturns in the real estate markets
of its lending areas, will not result in increased rates of delinquencies and
foreclosure losses in the future.
 
SERVICING COMPENSATION AND PAYMENT OF EXPENSES
 
     The Servicing Fee payable to each Servicer will vary from Pledged Mortgage
to Pledged Mortgage and (a) with respect to 99.7% of the Pledged Mortgages as of
the Cut-off Date, will range from 0.250% to 0.455% and (b) with respect to 0.3%
of the Pledged Mortgages as of the Cut-off Date, will range from 0.845% to
1.250%, in each case of the Stated Principal Balance of the related Pledged
Mortgage serviced by such Servicer. The Servicing Fees with respect to the
Pledged Mortgages are payable out of the interest payments on each Pledged
Mortgage. Included in the Servicing Fee Rate for certain Pledge Mortgages is
lender paid primary mortgage insurance. Under certain Servicing Agreements, the
amount of the Servicing Fee is subject to adjustment with respect to prepaid
Pledged Mortgages, as described herein under "-- Adjustment to Certain Servicing
Fees in Connection with Certain Prepaid Pledged Mortgages; Uncovered Prepayment
Interest Shortfalls." The Servicers will also be entitled to receive late
payment fees, assumption fees and other similar charges. The Master Servicer
will be entitled to receive a portion of the reinvestment income earned on
amounts on deposit in the Distribution Account.
 
ADJUSTMENT TO CERTAIN SERVICING FEES IN CONNECTION WITH CERTAIN PREPAID PLEDGED
MORTGAGES; UNCOVERED PREPAYMENT INTEREST SHORTFALLS
 
     Subject to the terms thereof, the Bond Insurance Policy permits claims
thereunder to be made for any Deficiency Amount related to shortfalls in
interest due on the Bonds irrespective of the occurrence of any Net Prepayment
Interest Shortfalls and Uncovered Prepayment Interest Shortfalls. When a
borrower prepays a Pledged Mortgage between Due Dates, the borrower is required
to pay interest on the amount prepaid only to the date of prepayment and not
thereafter. Principal prepayments by borrowers received during a calendar month
will be distributed to Bondholders on the Payment Date in the second month
following the month of receipt. Thus less than one month's interest may have
been collected on Pledged Mortgages that have prepaid with respect to any
Payment Date. A "Prepayment Interest Shortfall" is the amount by which interest
paid by a borrower in connection with a prepayment of principal on a Pledged
Mortgage is less than one month's interest at the related Mortgage Rate on the
Stated Principal Balance of such Pledged Mortgage. Pursuant to the Servicing
Agreements (a) which cover Pledged Mortgages representing approximately 76.02%
of the Initial Pool Principal Balance, the related Servicing Fee for any month
may be reduced, but not below zero, by
 
                                      S-48
<PAGE>   49
 
the amount of Prepayment Interest Shortfalls occurring during such month with
respect to the Pledged Mortgages serviced pursuant to the applicable Servicing
Agreement, and (b) which cover Pledged Mortgages representing approximately
10.72% of the Initial Pool Principal Balance, the related Servicing Fee may be
reduced, by not below zero, by the amount of Prepayment Interest Shortfalls
attributable to prepayments in full occurring during such month with respect to
the Pledged Mortgages serviced pursuant to the applicable Servicing Agreement,
but in each case only to the extent of the Servicing Fee thereunder. With
respect to each Servicing Agreement that provides for reduction of the
applicable Servicing Fee in the event of Prepayment Interest Shortfalls
occurring with respect to the Pledged Mortgages serviced thereunder, if
Prepayment Interest Shortfalls in any month occurring with respect to such
Pledged Mortgages exceed the amount of the applicable Servicing Fee for such
month that is eligible for reduction as described above, the amount of funds
available from collections to be paid to Bondholders in respect of interest on
the Pledged Mortgages on such Payment Date will be reduced by the amount of such
excess (such excess, the "Net Prepayment Interest Shortfall"). In addition, with
respect to those Servicing Agreements that do not provide for reduction of the
applicable Servicing Fee in the event of Prepayment Interest Shortfalls
occurring with respect to the Pledged Mortgages serviced thereunder, the
occurrence of Prepayment Interest Shortfalls with respect to the applicable
Pledged Mortgages will reduce the amount of Available Funds by the amount of
such Prepayment Interest Shortfalls (the "Uncovered Prepayment Interest
Shortfalls"). See "SECURITY FOR THE BONDS -- The Pledged Mortgages" herein.
 
ADVANCES
 
     Subject to the following limitations, each Servicer will be required to
advance prior to each Payment Date, from its own funds, or from amounts received
with respect to the Pledged Mortgages serviced pursuant to the applicable
Servicing Agreement that do not constitute Available Funds for such Payment
Date, amounts (net of the applicable Servicing Fee with respect to the related
Pledged Mortgages) which were due on the related Due Date on the Pledged
Mortgages serviced by such Servicer and which were delinquent during the related
Due Period, (any such advance, an "Advance") together with an amount equivalent
to interest on each such Pledged Mortgage.
 
     Advances are intended to maintain a regular flow of scheduled interest and
principal payments on the Bonds rather than to guarantee or insure against
losses. A Servicer is not obligated to make Advances (i) to the extent that such
Advances are, in its reasonable judgment, non-recoverable from future payments
and collections or insurance payments or proceeds of liquidation of the related
Pledged Mortgage or (ii) on any Pledged Mortgage as to which the related
Mortgaged Property has been acquired by the Bond Trustee through foreclosure or
deed-in-lieu of foreclosure ("REO Property"). Any failure by a Servicer to
advance funds as required under the related Servicing Agreement will constitute
a default thereunder, in which case the Master Servicer will be obligated to
make any such Advance in accordance with the terms of the Master Servicing
Agreement; provided, however, that in no event will the Master Servicer be
required to make an Advance that is not in its reasonable judgment, recoverable
from future payments and collections or insurance payments or proceeds of
liquidation of the related Pledged Mortgage. If the Servicer or Master Servicer
determines to make an Advance, such Advance will be included in Available Funds
for the related Payment Date. Any failure by the Master Servicer to make an
Advance as required under the Master Servicing Agreement will constitute a
Master Servicing Default thereunder, in which case the Bond Trustee or the
successor master servicer will be obligated to make any such Advance, in
accordance with the terms of the Master Servicing Agreement. Subject to the
terms of the Bond Insurance Policy, the Bond Insurance Policy will provide
protection to the Bondholders against any shortfall resulting from delinquencies
as to which a required Advance is not made as described above or is determined
to be nonrecoverable, to the extent such shortfall is not otherwise covered by
Available Funds.
 
                                USE OF PROCEEDS
 
     The Issuer intends to distribute all of the net proceeds of the issuance of
the Bonds to the Company which will use such proceeds to pay certain
indebtedness incurred by Redwood Trust in connection with the
 
                                      S-49
<PAGE>   50
 
acquisition of the Pledged Mortgages. See "USE OF PROCEEDS" in the Prospectus
and "METHOD OF DISTRIBUTION" herein.
 
                        FEDERAL INCOME TAX CONSEQUENCES
 
     Giancarlo and Gnazzo, A Professional Corporation, has advised the Company
that, in its opinion the Bonds will be treated as debt for federal income tax
purposes, and not as an ownership interest in the Mortgage Collateral, the
Issuer or a separate association taxable as a corporation. Interest will be
taxable to non-exempt Bondholders. The Tax Prepayment Assumption (as defined in
the Prospectus under "FEDERAL INCOME TAX CONSEQUENCES -- Interest and Original
Issue Discount") for the purposes of determining the amount and rate of accrual
of original issue discount on the Bonds assumes that the Pledged Mortgages are
prepaid at a rate of 21% CPR. Based upon the assumed prepayment rate and the
expected price to the public of the Bonds as of the date hereof (including
interest accrued before the Closing Date, if any), the Bonds will not be issued
with original issue discount. The Issuer intends to treat the Bonds as "Variable
Rate Debt Instruments" and the stated interest on the Bonds as "qualified stated
interest payments" (as each term is defined in the Prospectus under "FEDERAL
INCOME TAX CONSEQUENCES").
 
     Notwithstanding the use of the prepayment assumption in pricing the Bonds,
no representation is made that the Pledged Mortgages will actually prepay at 21%
CPR or at any other rate. The amount of any original issue discount and certain
other information with respect to each Bond will be set forth on the face of
such Bond as required by applicable regulations and as described in the
Prospectus. See "DESCRIPTION OF THE BONDS -- Weighted Average Life of the Bonds"
herein and "FEDERAL INCOME TAX CONSEQUENCES" in the Prospectus.
 
     The Issuer will not elect to treat the segregated pool of assets securing
the Bonds as a real estate mortgage investment conduit ("REMIC") for federal
income tax purposes. Giancarlo & Gnazzo, A Professional Corporation, has further
advised the Company that, in its opinion, the Issuer will not be classified as a
taxable mortgage pool.
 
                                 ERISA MATTERS
 
     Fiduciaries of employee benefit plans and certain other retirement plans
and arrangements, including individual retirement accounts and annuities, Keogh
plans, and collective investment funds in which such plans, accounts, annuities
or arrangements are invested, that are subject to the Employee Retirement Income
Security Act of 1974, as amended ("ERISA"), or corresponding provisions of the
Internal Revenue Code of 1986, as amended (the "Code") (any of the foregoing a
"Plan"), persons acting on behalf of a Plan, or persons using the assets of a
Plan ("Plan Investors"), should carefully review with their legal advisors
whether the purchase or holding of the Bonds could give rise to a transaction
that is prohibited under ERISA or the Code or cause the Pledged Mortgages
securing the Bonds to be treated as "plan assets" for purposes of regulations of
the Department of Labor set forth in 29 C.F.R. 2510.3-101 (the "Plan Asset
Regulations"). Prospective investors should be aware that, although certain
exceptions from the application of the prohibited transaction rules and the Plan
Asset Regulations exist, there can be no assurance that any such exception will
apply with respect to the acquisition of the Bonds. See "ERISA MATTERS" in the
Prospectus.
 
     If the Bonds are treated as equity for purposes of ERISA, the purchaser of
the Bonds could be treated as having acquired a direct interest in the Pledged
Mortgages securing the Bonds. In that event, the purchase, holding, or resale of
the Bonds could result in a transaction that is prohibited under ERISA or the
Code. Furthermore, regardless of whether the Bonds are treated as equity for
purposes of ERISA, the acquisition or holding of the Bonds by or on behalf of a
Plan could still be considered to give rise to a prohibited transaction if the
Issuer, the Trustee, the Master Servicer, any Servicer or any of their
respective Affiliates is or becomes a party in interest or a disqualified person
with respect to such Plan. However, one or more alternative exemptions may be
available with respect to certain prohibited transaction rules of ERISA that
might apply in connection with the initial purchase, holding and resale of the
Bonds, depending in part upon the type of Plan fiduciary making the decision to
acquire the Bonds and the circumstances under which such decision is made.
 
                                      S-50
<PAGE>   51
 
Those exemptions include, but are not limited to: (i) Prohibited Transaction
Class Exemption ("PTCE") 95-60, regarding investments by insurance company
general accounts; (ii) PTCE 91-38, regarding investments by bank collective
investment funds; (iii) PTCE 90-1, regarding investments by insurance company
pooled separate accounts; (iv) PTCE 84-14, regarding transactions negotiated by
qualified professional asset managers; or (v) PTCE 96-23, regarding transactions
effected by in-house asset managers. Before purchasing the Bonds, a Plan subject
to the fiduciary responsibility provisions of ERISA or described in Section
4975(e)(1) (and not exempt under Section 4975(g)) of the Code should consult
with its counsel to determine whether the conditions of any exemption would be
met. A purchaser of the Bonds should be aware, however, that even if the
conditions specified in one or more exemptions are met, the scope of the relief
provided by an exemption might not cover all acts that might be construed as
prohibited transactions. See "ERISA MATTERS" in the Prospectus.
 
     Although not entirely free from doubt, the Issuer believes that the Bonds
will be treated as debt obligations without significant equity features for
purposes of the Plan Asset Regulations. Accordingly, a Plan that acquires the
Bonds should not be treated as having acquired a direct interest in the assets
of the Issuer. However, there can be no complete assurance that the Bonds will
be treated as debt obligations without significant equity features for purposes
of the Plan Asset Regulations.
 
                             METHOD OF DISTRIBUTION
 
     Subject to the terms and conditions set forth in the Underwriting Agreement
between the Company, Redwood Trust and the Underwriter, the Company has agreed
to cause the Issuer to sell to the Underwriter, and the Underwriter has agreed
to purchase from the Issuer, the Bonds. Distribution of the Bonds will be made
by the Underwriter from time to time in negotiated transactions or otherwise at
varying prices to be determined at the time of sale. In connection with the sale
of the Bonds, the Underwriter may be deemed to have received compensation from
the Issuer in the form of underwriting discounts.
 
     The Underwriter intends to make a secondary market in the Bonds, but has no
obligation to do so. There can be no assurance that a secondary market for the
Bonds will develop or, if it does develop, that it will continue or that it will
provide Bondholders with a sufficient level of liquidity of investment. The
Bonds will not be listed on any national securities exchange.
 
     Immediately prior to the sale of the Pledged Mortgages to the Company, the
Pledged Mortgages were subject to financing provided by an affiliate of the
Underwriter. The Issuer will apply a portion of the proceeds it receives from
the sale of the Pledged Mortgages to the Company to repay the financing.
 
     The Company and Redwood Trust have agreed to indemnify the Underwriter
against, or make contributions to the Underwriter with respect to, certain
liabilities, including liabilities under the Securities Act of 1933, as amended.
 
                                    EXPERTS
 
     The consolidated financial statements of MBIA Insurance Corporation and
Subsidiaries as of December 31, 1996 and December 31, 1995 and for each of the
three years in the period ended December 31, 1996, incorporated by reference
into this Prospectus Supplement, have been audited by Coopers & Lybrand, L.L.P.,
independent accountants, as set forth in their report thereon incorporated by
reference herein in reliance upon the authority of such firm as experts in
accounting and auditing.
 
                                 LEGAL MATTERS
 
     The validity of the Bonds will be passed upon for the Issuer by Tobin &
Tobin, a professional corporation, San Francisco, California. Certain tax
matters will be passed upon by for the Issuer by Giancarlo and Gnazzo, A
Professional Corporation, San Francisco, California. Brown & Wood LLP, New York,
New York will act as counsel for the Underwriter.
 
                                      S-51
<PAGE>   52
 
                                    RATINGS
 
     It is a condition of the issuance of the Bonds that they be rated "Aaa" by
Moody's and "AAA" by S&P (Moody's and S&P, together, the "Rating Agencies").
 
     The ratings assigned to collateralized mortgage obligations address the
likelihood of the receipt of all payments on the mortgage loans by the related
bondholders under the agreements pursuant to which such bonds are issued. Such
ratings take into consideration the credit quality of the related mortgage pool,
including any credit support providers, structural and legal aspects associated
with such bonds, and the extent to which the payment stream on the mortgage pool
is adequate to make the payments required by such bonds. Ratings on such bonds
do not, however, constitute a statement regarding frequency of prepayments of
the mortgage loans.
 
     The ratings assigned to the Bonds should be evaluated independently from
similar ratings on other types of securities. A rating is not a recommendation
to buy, sell or hold securities and may be subject to revision or withdrawal at
any time by the Rating Agencies.
 
     The Issuer has not requested a rating of the Bonds by any rating agency
other than the Rating Agencies; there can be no assurance, however, as to
whether any other rating agency will rate the Bonds or, if it does, what rating
would be assigned by such other rating agency. The rating assigned by such other
rating agency to the Bonds could be lower than the respective ratings assigned
by the Rating Agencies.
 
                                      S-52
<PAGE>   53
 
                          INDEX OF CERTAIN DEFINITIONS
 
<TABLE>
<CAPTION>
                                                                                        PAGE
                                                                                        -----
<S>                                                                                     <C>
Adjustment Date....................................................................S-10, S-35
Advance..................................................................................S-49
Advances..................................................................................S-9
Agreement................................................................................S-28
Available Funds..........................................................................S-20
Basic Principal Amount...................................................................S-24
Beneficial owner.........................................................................S-16
Bond Account.......................................................................S-10, S-19
Bond Insurance Policy................................................................S-1, S-8
Bond Interest Rate.......................................................................S-21
Bond Interest Rates.......................................................................S-5
Bond Owners..............................................................................S-16
Bond Principal Balance....................................................................S-6
Bond Trustee.........................................................................S-3, S-4
Bondholders' Interest Carryover..........................................................S-21
Bonds..........................................................................S-1, S-3, S-16
Book-Entry Bonds....................................................................S-3, S-16
Business day.............................................................................S-28
Capped Amount............................................................................S-21
CEDEL Participants.......................................................................S-17
Class A-1 Bondholders' Interest Carryover................................................S-21
Class A-2 Bondholders' Interest Carryover................................................S-21
Class A-1 Interest Rate...................................................................S-5
Class A-2 Interest Rate...................................................................S-5
Code...............................................................................S-11, S-50
Company..............................................................................S-1, S-3
Converted Mortgage Loan..................................................................S-45
Convertible Mortgage.....................................................................S-45
Convertible Pledged Mortgage.............................................................S-10
Cooperative..............................................................................S-18
Countrywide..............................................................................S-46
Countrywide Servicing Agreement..........................................................S-46
CPR......................................................................................S-32
Defective Pledged Mortgage...............................................................S-34
Deferred Interest........................................................................S-35
Deficiency Amount...................................................................S-8, S-28
Definitive Bond..........................................................................S-16
Deleted Pledged Mortgage.................................................................S-44
Delinquent Pledged Mortgage..............................................................S-26
</TABLE>
 
                                      S-53
<PAGE>   54
 
<TABLE>
<CAPTION>
                        INDEX OF CERTAIN DEFINITIONS (CONT'D)                           PAGE
                                                                                        -----
<S>                                                                                     <C>
Deposit Trust Agreement...................................................................S-4
Distribution Account...............................................................S-10, S-19
DTC.................................................................................S-15, I-1
DTC Participant...........................................................................I-1
Due Date.................................................................................S-20
Due Period...............................................................................S-20
ERISA..............................................................................S-11, S-50
Euroclear Operator.......................................................................S-18
Euroclear Participants...................................................................S-18
European Depositaries....................................................................S-16
Excess Cash Flow Principal Amount........................................................S-24
Excess spread............................................................................S-26
Exchange Act..............................................................................S-2
Expense Fee Rate..........................................................................S-7
Fed Funds Average Rate...................................................................S-22
Fed Funds Business Day...................................................................S-22
Fed Funds Calculation Period.............................................................S-22
Fed Funds Interest Determination Date....................................................S-22
Fed Funds Interest Reset Date............................................................S-22
Fed Funds Rate...........................................................................S-23
FHLMC....................................................................................S-35
FICO.....................................................................................S-45
Financial Intermediary...................................................................S-16
Fiscal Agent.............................................................................S-28
Fitch.....................................................................................S-9
FNMA.....................................................................................S-36
GAAP.....................................................................................S-30
Global Bonds..............................................................................I-1
Indenture.................................................................................S-4
Indices..................................................................................S-10
Indirect Participants....................................................................S-16
Initial Pool Principal Balance............................................................S-7
Insurance Proceeds.......................................................................S-20
Insured Payment..........................................................................S-28
Insurer.............................................................................S-8, S-27
Insurer Reimbursement Amount.............................................................S-24
Interest Accrual Period..................................................................S-21
Interest Payment Amount.............................................................S-4, S-21
Investor Certificate.....................................................................S-16
Issuer....................................................................................S-1
LIBOR....................................................................................S-22
</TABLE>
 
                                      S-54
<PAGE>   55
 
<TABLE>
<CAPTION>
                        INDEX OF CERTAIN DEFINITIONS (CONT'D)                           PAGE
                                                                                        -----
<S>                                                                                     <C>
LIBOR Rate Determination Date............................................................S-22
Liquidation Proceeds.....................................................................S-20
Loan-to-Value Ratio......................................................................S-36
Main Street..............................................................................S-46
Main Street Servicing Agreement..........................................................S-46
Management Agreement......................................................................S-3
Management Fee............................................................................S-7
Master Servicer...........................................................................S-4
Master Servicing Agreement................................................................S-3
Maximum Rate.............................................................................S-35
Moody's...................................................................................S-8
Morgan...................................................................................S-18
Mortgage.................................................................................S-44
Mortgage File............................................................................S-44
Mortgage Loan Purchase Agreement.........................................................S-34
Mortgage Note............................................................................S-44
Mortgaged Property.......................................................................S-34
NationsBanc..............................................................................S-46
NationsBank Servicing Agreement..........................................................S-46
Neg Am Mortgages...................................................................S-10, S-35
Net Available Funds......................................................................S-21
Net Interest Shortfall...................................................................S-36
Net Interest Shortfalls..................................................................S-36
Net Monthly Excess Cashflow..............................................................S-24
Net Mortgage Rate.........................................................................S-7
Net Prepayment Interest Shortfall........................................................S-49
Notice...................................................................................S-28
One Month CMT............................................................................S-34
One-Month LIBOR....................................................................S-10, S-34
One-Year CMT.......................................................................S-10, S-34
Originator...............................................................................S-45
Overcollateralization Amount..............................................................S-8
Owner....................................................................................S-29
Owner Trustee.............................................................................S-3
Page 120.................................................................................S-23
Participants.............................................................................S-16
Payment Adjustment Date..................................................................S-35
Payment Change Date......................................................................S-34
Payment Date...................................................................S-1, S-4, S-20
Plan...............................................................................S-11, S-50
Plan Asset Regulations.............................................................S-12, S-50
</TABLE>
 
                                      S-55
<PAGE>   56
 
<TABLE>
<CAPTION>
                        INDEX OF CERTAIN DEFINITIONS (CONT'D)                           PAGE
                                                                                        -----
<S>                                                                                     <C>
Plan Assets..............................................................................S-50
Plan Investors.....................................................................S-11, S-50
Pledged Mortgage Pool..........................................................S-9, S-31 S-34
Pledged Mortgages.........................................................................S-2
Pool Principal Balance....................................................................S-7
Positive Rate Differential................................................................S-7
Preference Amount........................................................................S-29
Prepayment Interest Shortfall............................................................S-48
Primary Mortgage Insurance Policy........................................................S-36
Principal Balance.........................................................................S-5
Principal Distributable Amount...........................................................S-24
Principal Payment Amount.................................................................S-24
PTCE.....................................................................................S-51
Purchase Price...........................................................................S-46
Rating Agencies....................................................................S-12, S-52
Realized Loss............................................................................S-25
Redemption Price....................................................................S-6, S-26
Redwood Trust..................................................................S-1, S-3, S-15
Reference Banks..........................................................................S-22
Relevant Depositary......................................................................S-16
Relief Act Reduction.....................................................................S-36
REMIC....................................................................................S-50
REO Property.............................................................................S-49
Replacement Pledged Mortgage.............................................................S-44
Reuters Screen NYAA Page.................................................................S-23
RFC Servicing Agreements.................................................................S-46
RFC......................................................................................S-46
Rules....................................................................................S-16
S&P.......................................................................................S-9
SAP......................................................................................S-30
Scheduled Payments.......................................................................S-34
Servicer..................................................................................S-3
Servicing Agreement.......................................................................S-3
Servicing Fee.............................................................................S-7
Servicing Fee Rate........................................................................S-7
Six-Month LIBOR....................................................................S-10, S-34
SMMEA....................................................................................S-12
Specified Overcollateralization Amount...................................................S-24
Stated Principal Balance..................................................................S-7
Structuring Assumptions..................................................................S-31
Subordination Deficit....................................................................S-25
</TABLE>
 
                                      S-56
<PAGE>   57
 
<TABLE>
<CAPTION>
                        INDEX OF CERTAIN DEFINITIONS (CONT'D)                           PAGE
                                                                                        -----
<S>                                                                                     <C>
Substitution Adjustment Amount...........................................................S-44
Targeted Principal Balance...............................................................S-24
Telerate Page 120........................................................................S-23
Telerate Page 3750.......................................................................S-22
Terms and Conditions.....................................................................S-18
Uncovered Prepayment Interest Shortfalls.................................................S-49
Underwriter...............................................................................S-1
Variable Rate Debt Instruments.....................................................S-11, S-50
Weighted Average Net Mortgage Rate........................................................S-7
Withdrawal Date..........................................................................S-20
</TABLE>
 
                                      S-57
<PAGE>   58
 
                                                                         ANNEX I
 
         GLOBAL CLEARANCE, SETTLEMENT AND TAX DOCUMENTATION PROCEDURES
 
     Except in certain limited circumstances, the globally offered Sequoia
Mortgage Trust 1, Collateralized Mortgage Bonds (the "Global Bonds") will be
available only in book-entry form. Investors in the Global Bonds may hold such
Global Bonds through any of The Depository Trust Company ("DTC"), CEDEL or
Euroclear. The Global Bonds will be tradeable as home market instruments in both
the European and U.S. domestic markets. Initial settlement and all secondary
trades will settle in same-day funds.
 
     Secondary market trading between investors holding Global Bonds through
CEDEL and Euroclear will be conducted in the ordinary way in accordance with
their normal rules and operating procedures and in accordance with conventional
Eurobond practice (i.e., seven calendar day settlement).
 
     Secondary market trading between investors holding Global Bonds through DTC
will be conducted according to the rules and procedures applicable to U.S.
corporate debt obligations and prior collateralized mortgage bond issues.
 
     Secondary cross-market trading between CEDEL or Euroclear and DTC
Participants holding Global Bonds will be effected on a delivery-against-payment
basis through the respective Depositaries of CEDEL and Euroclear (in such
capacity) and as DTC Participants.
 
     Non-U.S. holders (as described below) of Global Bonds will be subject to
U.S. withholding taxes unless such holders meet certain requirements and deliver
appropriate U.S. tax documents to the securities clearing organizations or their
participants.
 
INITIAL SETTLEMENT
 
     All Global Bonds will be held in book-entry form by DTC in the name of Cede
& Co. as nominee of DTC. Investors' interests in the Global Bonds will be
represented through financial institutions acting on their behalf as direct and
indirect participants in DTC (each, a "DTC Participant"). As a result, CEDEL and
Euroclear will hold positions on behalf of their participants through their
respective Depositaries, which in turn will hold such positions in accounts as
DTC Participants.
 
     Investors electing to hold their Global Bonds through DTC will follow the
settlement practices applicable to other collateralized mortgage bond issues.
Investor securities custody accounts will be credited with their holdings
against payment in same-day funds on the settlement date.
 
     Investors electing to hold their Global Bonds through CEDEL or Euroclear
accounts will follow the settlement procedures applicable to conventional
Eurobonds, except that there will be no temporary global security and no
"lock-up" or restricted period. Global Bonds will be credited to the securities
custody accounts on the settlement date against payment in same-day funds.
 
SECONDARY MARKET TRADING
 
     Since the purchaser determines the place of delivery, it is important to
establish at the time of the trade where both the purchaser's and seller's
accounts are located to ensure that settlement can be made on the desired value
date.
 
     Trading Between DTC Participants. Secondary market trading between DTC
Participants will be settled using the procedures applicable to prior
collateralized mortgage bond issues in same-day funds.
 
     Trading Between CEDEL and/or Euroclear Participants. Secondary market
trading between CEDEL Participants or Euroclear Participants will be settled
using the procedures applicable to conventional Eurobonds in same-day funds.
 
     Trading Between DTC Seller and Cedel or Euroclear Purchaser. When Global
Bonds are to be transferred from the account of a DTC Participant to the account
of a CEDEL Participant or a Euroclear
 
                                       I-1
<PAGE>   59
 
Participant, the purchaser will send instructions to CEDEL or Euroclear through
a CEDEL Participant or Euroclear Participant at least one business day prior to
settlement. CEDEL or Euroclear will instruct the respective Depositary, as the
case may be, to receive the Global Bonds against payment. Payment will include
interest accrued on the Global Bonds from and including the last coupon payment
date to and excluding the settlement date, on the basis of the actual number of
days in such accrual period and a year assumed to consist of 360 days. For
transactions settling on the 31st of the month, payment will include interest
accrued to and excluding the first day of the following month. Payment will then
be made by the respective Depositary of the DTC Participant's account against
delivery of the Global Bonds. After settlement has been completed, the Global
Bonds will be credited to the respective clearing system and by the clearing
system, in accordance with its usual procedures, to the CEDEL Participant's or
Euroclear Participant's account. The securities credit will appear the next day
(European time) and the cash debt will be back-valued to, and the interest on
the Global Bonds will accrue from, the value date (which would be the preceding
day when settlement occurred in New York). If settlement is not completed on the
intended value date (i.e., the trade fails), the CEDEL or Euroclear cash debt
will be valued instead as of the actual settlement date.
 
     CEDEL Participants and Euroclear Participants will need to make available
to the respective clearing systems the funds necessary to process same-day funds
settlement. The most direct means of doing so is to preposition funds for
settlement, either from cash on hand or existing lines of credit, as they would
for any settlement occurring within CEDEL or Euroclear. Under this approach,
they may take on credit exposure to CEDEL or Euroclear until the Global Bonds
are credited to their accounts one day later.
 
     As an alternative, if CEDEL or Euroclear has extended a line of credit to
them, CEDEL Participants or Euroclear Participants can elect not to preposition
funds and allow that credit line to be drawn upon the finance settlement. Under
this procedure, CEDEL Participants or Euroclear Participants purchasing Global
Bonds would incur overdraft charges for one day, assuming they cleared the
overdraft when the Global Bonds were credited to their accounts. However,
interest on the Global Bonds would accrue from the value date. Therefore, in
many cases the investment income on the Global Bonds earned during that one-day
period may substantially reduce or offset the amount of such overdraft charges,
although this result will depend on each CEDEL Participant's or Euroclear
Participant's particular cost of funds. Since the settlement is taking place
during New York business hours, DTC Participants can employ their usual
procedures for sending Global Bonds to the respective European Depository for
the benefit of CEDEL Participants or Euroclear Participants. The sale proceeds
will be available to the DTC seller on the settlement date. Thus, to the DTC
Participants a cross-market transaction will settle no differently than a trade
between two DTC Participants.
 
     Trading Between CEDEL or Euroclear Seller and DTC Purchaser. Due to time
zone differences in their favor, CEDEL Participants and Euroclear Participants
may employ their customary procedures for transactions in which Global Bonds are
to be transferred by the respective clearing system, through the respective
Depositary, to a DTC Participant. The seller will send instructions to CEDEL or
Euroclear through a CEDEL Participant or Euroclear Participant at least one
business day prior to settlement. In these cases CEDEL or Euroclear will
instruct the respective Depositary, as appropriate, to deliver the Global Bonds
to the DTC Participant's account against payment. Payment will include interest
accrued on the Global Bonds from and including the last coupon payment to and
excluding the settlement date on the basis of the actual number of days in such
accrual period and a year assumed to consist of 360 days. For transactions
settling on the 31st of the month, payment will include interest accrued to and
excluding the first day of the following month. The payment will then be
reflected in the account of the CEDEL Participant or Euroclear Participant the
following day, and receipt of the cash proceeds in the CEDEL Participant's or
Euroclear Participant's account would be back-valued to the value date (which
would be the preceding day, when settlement occurred in New York). Should the
CEDEL Participant or Euroclear Participant have a line of credit with its
respective clearing system and elect to be in debt in anticipation of receipt of
the sale proceeds in its account, the back-valuation will extinguish any
overdraft incurred over that one-day period. If settlement is not completed on
the intended valued date (i.e., the trade fails), receipt of the cash proceeds
in the CEDEL Participant's or Euroclear Participant's account would instead be
valued as of the actual settlement date.
 
     Finally, day traders that use CEDEL or Euroclear and that purchase Global
Bonds from DTC Participants for delivery to CEDEL Participants or Euroclear
Participants should note that these trades would
 
                                       I-2
<PAGE>   60
 
automatically fail on the sale side unless affirmative action were taken. At
least three techniques should be readily available to eliminate this potential
problem:
 
          (a) borrowing through CEDEL or Euroclear for one day (until the
     purchase side of the day trade is reflected in their CEDEL or Euroclear
     accounts) in accordance with the clearing system's customary procedures;
 
          (b) borrowing the Global Bonds in the U.S. from a DTC Participant no
     later than one day prior to settlement, which would give the Global Bonds
     sufficient time to be reflected in their CEDEL or Euroclear account in
     order to settle the sale side of the trade; or
 
          (c) staggering the value dates for the buy and sell sides of the trade
     so that the value date for the purchase from the DTC Participant is at
     least one day prior to the value date for the sale to the CEDEL Participant
     or Euroclear Participant.
 
CERTAIN U.S. FEDERAL INCOME TAX DOCUMENTATION REQUIREMENTS
 
     A beneficial owner of the Global Bonds holding securities through CEDEL or
Euroclear (or through DTC if the holder has an address outside the U.S.) will be
subject to the 30% U.S. withholding tax that generally applies to payments of
interest (including original issue discount) on registered debt issued by U.S.
Persons, unless (i) each clearing system, bank or other financial institution
that holds customers' securities in the ordinary course of its trade or business
in the chain of intermediaries between such beneficial owner and the U.S. entity
required to withhold tax complies with applicable certification requirements and
(ii) such beneficial owner takes one of the following steps to obtain an
exemption or reduced tax rate:
 
     Exemption For Non-U.S. Persons (Form W-8). Beneficial owners of the Global
Bonds that are non-U.S. Persons can obtain a complete exemption from the
withholding tax by filing a signed Form W-8 (Certificate of Foreign Status). If
the information shown on Form W-8 changes, a new Form W-8 must be filed within
30 days of such change.
 
     Exemption For Non-U.S. Persons with Effectively Connected Income (Form
4224). A non-U.S. Person, including a non-U.S. corporation or bank with a U.S.
branch, for which the interest income is effectively connected with its conduct
of a trade or business in the United States, can obtain an exemption from the
withholding tax by filing Form 4224 (Exemption from Withholding of Tax on Income
Effectively Connected with the Conduct of a Trade or Business in the United
States).
 
     Exemption or Reduced Rate For Non-U.S. Persons Resident in Treaty Countries
(Form 1001). Non-U.S. Persons that are Bond Owners residing in a country that
has a tax treaty with the United States can obtain an exemption or reduced tax
rate (depending on the treaty terms) by filing Form 1001 (Ownership, Exemption
or Reduced Rate Certificate). If the treaty provides only for a reduced rate,
withholding tax will be imposed at that rate unless the filer alternatively
files Form W-8. Form 1001 may be filed by the Bond Owner or his agent.
 
     Exemption For U.S. Persons (Form W-9). U.S. Persons can obtain a complete
exemption from the withholding tax by filing Form W-9 (Payer's Request for
Taxpayer Identification Number and Certification).
 
     U.S. Federal Income Tax Reporting Procedure. The Bond Owner of a Bond or,
in the case of a Form 1001 or a Form 4224 filer, his agent, files by submitting
the appropriate form to the person through whom it holds (the clearing agency,
in the case of persons holding directly on the books of the clearing agency).
Form W-8 and Form 1001 are effective for three calendar years and Form 4224 is
effective for one calendar year.
 
     The term "U.S. Person" means a citizen or resident of the United States, a
corporation, partnership or other entity created or organized in or under the
laws of the United States or any political subdivision thereof, or an estate
whose income is subject to U.S. federal income tax regardless of its source of
income, or a trust if a court within the United States is able to exercise
primary supervision of the administration of the trust and one or more United
States fiduciaries have the authority to control all substantial decisions of
the trust. This summary does not deal with all aspects of U.S. federal income
tax withholding that may be relevant to foreign holders of the Global Bonds.
Investors are advised to consult their own tax advisors for specific tax advice
concerning their holding and disposing of the Global Bonds.
 
                                       I-3
<PAGE>   61
 
PROSPECTUS
 
                      SEQUOIA MORTGAGE FUNDING CORPORATION
                                   DEPOSITOR
 
                                 $3,000,000,000
                               (AGGREGATE AMOUNT)
 
                         COLLATERALIZED MORTGAGE BONDS
                              (ISSUABLE IN SERIES)
                            ------------------------
 
       Sequoia Mortgage Funding Corporation, a Delaware corporation (the
"Company"), proposes to establish one or more trusts to issue and sell from time
to time under this Prospectus and related Prospectus Supplements one or more
Series of Collateralized Mortgage Bonds (the "Bonds"). The Bonds of each Series
will be collateralized by mortgage collateral (the "Mortgage Collateral")
consisting of one or more of the following: (i) fixed-rate, first or junior lien
mortgage loans secured by one- to four-family residential properties (the "Fixed
Rate Pledged Mortgages"), (ii) floating-rate, first or junior lien mortgage
loans secured by one- to four-family residential properties (the "Floating Rate
Pledged Mortgages" and, together with the Fixed Rate Pledged Mortgages, the
"Pledged Mortgages"), (iii) mortgage pass-through securities (the "Agency
Securities") issued or guaranteed by the Government National Mortgage
Association ("GNMA"), the Federal National Mortgage Association ("FNMA") or the
Federal Home Loan Mortgage Corporation ("FHLMC"), (iv) Private Mortgage-Backed
Securities (as defined herein), (v) a combination of such Agency Securities
and/or Private Mortgage-Backed Securities (collectively, the "Certificates") or
(vi) a combination of Certificates and Pledged Mortgages. A Series of Bonds also
may be secured by certain cash accounts, insurance policies, surety bonds,
guaranteed investment contracts, cross-collateralization,
over-collateralization, excess spread reinvestment income, guaranties, letters
of credit or derivative arrangements to the extent described herein and in the
related Prospectus Supplement. Certain capitalized terms used and not otherwise
defined herein shall have the meanings ascribed thereto elsewhere in this
Prospectus. See "INDEX OF CERTAIN DEFINITIONS" on page 85 of this Prospectus for
the location of the definitions of certain capitalized terms.
 
     Each Series of Bonds will consist of one or more Classes of Bonds. Interest
on the Bonds will accrue at a fixed rate, a variable rate or a combination
thereof, as determined in the manner specified in the related Prospectus
Supplement. Principal payments on each Class of Bonds of a Series will be made
in the manner specified in the related Prospectus Supplement. If so specified in
the related Prospectus Supplement, one or more Classes of Bonds of a Series may
be entitled to receive payments of principal, interest or any combination
thereof prior to one or more other Classes of Bonds of such Series either for
the life of such Bonds or during certain periods. A Series of Bonds may include
one or more Classes of Bonds entitled to (i) principal distributions, with
disproportionate, nominal or no interest distributions or (ii) interest
distributions, with disproportionate, nominal or no principal distributions. In
addition, a Series of Bonds may include one or more Classes of Bonds that are
senior in right of payment to one or more other Classes of Bonds of such Series.
Credit enhancement for the Bonds of a Series will be as specified in the related
Prospectus Supplement.
 
     The rate of payment of the principal of each Class of Bonds will generally
depend, among other things, on the rate of payment (including prepayments) of
the Mortgage Collateral pledged as security therefor. Consequently, the actual
maturity of any Class of Bonds could occur substantially sooner than its Stated
Maturity. Each Series of Bonds may be redeemed under the circumstances described
herein and in the related Prospectus Supplement.
 
     FOR A DISCUSSION OF CERTAIN RISK FACTORS RELATING TO INVESTMENTS IN THE
BONDS, SEE "RISK FACTORS" COMMENCING ON PAGE 19 OF THIS PROSPECTUS.
 
  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.
 
     Each Series of Bonds will be issued by a separate trust (each, an "Issuer")
established by the Company, will represent obligations solely of such Issuer and
will not be insured or guaranteed by GNMA, FNMA or FHLMC or any other
governmental agency or instrumentality or by the Company, any affiliate of the
Company, or, unless otherwise specified in the related Prospectus Supplement,
any other person or entity. No Issuer of any Series of Bonds is expected to have
significant assets other than those pledged as collateral for such Series of
Bonds. Prior to issuance, there will have been no market for the Bonds of any
Series, and there can be no assurance that a secondary market for any Bonds will
develop or, if it does develop that it will continue or provide Bondholders with
a sufficient level of liquidity of investment. This Prospectus may not be used
to consummate sales of a Series of Bonds unless accompanied by a Prospectus
Supplement.
 
     Bonds of each Series will be characterized for federal income tax purposes
as debt instruments. See "FEDERAL INCOME TAX CONSEQUENCES" herein.
 
     Offers of the Bonds of any Series may be made through one or more different
methods, including offerings through underwriters, as more fully described under
"PLAN OF DISTRIBUTION" herein and in the related Prospectus Supplement.
 
July 25, 1997.
<PAGE>   62
 
     UNTIL 90 DAYS AFTER THE DATE OF EACH PROSPECTUS SUPPLEMENT, ALL DEALERS
EFFECTING TRANSACTIONS IN THE SECURITIES COVERED BY SUCH PROSPECTUS SUPPLEMENT,
WHETHER OR NOT PARTICIPATING IN THE DISTRIBUTION THEREOF, MAY BE REQUIRED TO
DELIVER SUCH PROSPECTUS SUPPLEMENT AND THIS PROSPECTUS. THIS IS IN ADDITION TO
THE OBLIGATION OF DEALERS TO DELIVER A PROSPECTUS AND PROSPECTUS SUPPLEMENT WHEN
ACTING AS UNDERWRITERS AND WITH RESPECT TO THEIR UNSOLD ALLOTMENTS OR
SUBSCRIPTIONS.
 
                             PROSPECTUS SUPPLEMENT
 
     The Prospectus Supplement relating to a Series of Bonds to be offered
hereunder will, among other things, set forth with respect to such Series of
Bonds, if applicable: (i) information concerning the Issuer of such Series of
Bonds; (ii) the principal amount and the interest rate, or the method to be used
to determine the interest rate, of each Class of such Series of Bonds; (iii)
certain characteristics of the Mortgage Collateral securing such Series of Bonds
and, if applicable, information as to any insurance policies, surety bonds,
guaranties, derivative arrangements, cross-collateralization,
overcollateralization, excess spread reinvestment income, guaranteed investment
contracts or letters of credit, and the amount and source of any Reserve Fund or
other cash account for the Bonds of such Series; (iv) the circumstances, if any,
under which the Bonds of such Series are subject to special redemption or
optional redemption; (v) the Stated Maturity of each Class of Bonds of such
Series; (vi) the method used to calculate the aggregate amount of principal
required to be applied to the Bonds of such Series on each Payment Date and the
priority in which such payments will be applied among the Classes of Bonds of
such Series; (vii) the principal amount of each Class of Bonds of such Series
that would be outstanding on specified Payment Dates if the Pledged Mortgages or
the mortgage loans underlying the Certificates, as the case may be, pledged as
security for such Bonds, were prepaid at various assumed rates; (viii) the
Payment Dates and the Assumed Reinvestment Rate for such Series of Bonds; (ix)
information as to the nature and extent of subordination with respect to any
Class of Bonds of such Series that is subordinate in right of payment to any
other Class; (x) any minimum principal payment requirements and the terms of any
related minimum principal payment agreement with respect to such Series of
Bonds; (xi) additional information with respect to the plan of distribution of
the Bonds of such Series; and (xii) information as to the Master Servicer and
the Bond Trustee for such Series.
 
                             AVAILABLE INFORMATION
 
     The Depositor has filed with the Securities and Exchange Commission (the
"Commission") a Registration Statement under the Securities Act of 1933, as
amended (the "Securities Act"), with respect to the Bonds. This Prospectus,
which forms a part of the Registration Statement, and the Prospectus Supplement
relating to each Series of Bonds contain summaries of the material terms of the
documents referred to herein and therein, but do not contain all of the
information set forth in the Registration Statement pursuant to the Rules and
Regulations of the Commission. For further information, reference is made to
such Registration Statement and the exhibits thereto. Such Registration
Statement and exhibits can be inspected and copied at prescribed rates at the
public reference facilities maintained by the Commission at its Public Reference
Section, 450 Fifth Street, N.W., Washington, D.C. 20549, and at its Regional
Offices located as follows: Midwest Regional Office, 500 West Madison Street,
Suite 1400, Chicago, Illinois 60661; and Northeast Regional Office, Seven World
Trade Center, New York, New York 10048. The Commission also maintains a Web site
at http://www.sec.gov from which such Registration Statement and exhibits may be
obtained.
 
     No person has been authorized to give any information or to make any
representation other than those contained in this Prospectus and any Prospectus
Supplement with respect hereto and, if given or made, such information or
representations must not be relied upon. This Prospectus and any Prospectus
Supplement with respect hereto do not constitute an offer to sell or a
solicitation of an offer to buy any securities other than the Bonds offered
hereby and thereby nor an offer of the Bonds to any person in any state or other
jurisdiction in which such offer would be unlawful. The delivery of this
Prospectus at any time does not imply that information herein is correct as of
any time subsequent to its date.
 
                                        2
<PAGE>   63
 
                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE
 
     All documents subsequently filed by or on behalf of the Issuer referred to
in the accompanying Prospectus Supplement with the Commission pursuant to
Section 13(a), 13(c), 14 or 15(d) of the Securities Exchange Act of 1934, as
amended (the "Exchange Act"), after the date of this Prospectus and prior to the
termination of any offering of the Bonds issued by such Issuer shall be deemed
to be incorporated by reference in this Prospectus and to be a part of this
Prospectus from the date of the filing of such documents. Any statement
contained in a document incorporated or deemed to be incorporated by reference
herein shall be deemed to be modified or superseded for all purposes of this
Prospectus to the extent that a statement contained herein (or in the
accompanying Prospectus Supplement) or in any other subsequently filed document
which also is or is deemed to be incorporated by reference modifies or replaces
such statement. Any such statement so modified or superseded shall not be
deemed, except as so modified or superseded, to constitute a part of this
Prospectus. None of the Company, the Master Servicer or the Bond Trustee for any
Series intends to file with the Commission periodic reports with respect to the
related Issuer following completion of the reporting period required by Rule
15d-1 or Regulation 15D under the Exchange Act.
 
     The Bond Trustee or such other entity specified in the related Prospectus
Supplement on behalf of any Issuer will provide without charge to each person to
whom this Prospectus is delivered, on the written or oral request of such
person, a copy of any or all of the documents referred to above that have been
or may be incorporated by reference in this Prospectus (not including exhibits
to the information that is incorporated by reference unless such exhibits are
specifically incorporated by reference into the information that this Prospectus
incorporates). Such requests should be directed to the Corporate Trust Office of
the Bond Trustee or the address of such other entity specified in the
accompanying Prospectus Supplement. Included in the accompanying Prospectus
Supplement is the name, address, telephone number and, if available, facsimile
number of the office or contact person at the Corporate Trust Office of the Bond
Trustee or such other entity.
 
                                        3
<PAGE>   64
 
                                    SUMMARY
 
     The following summary is qualified in its entirety by reference to the
detailed information appearing elsewhere in this Prospectus and in the related
Prospectus Supplement with respect to the Series of Bonds offered thereby and to
the related Indenture (as defined herein). Certain capitalized terms used and
not otherwise defined herein shall have the meanings ascribed thereto elsewhere
in this Prospectus. See "INDEX OF CERTAIN DEFINITIONS" on page 85 of this
Prospectus for the location of the definitions of certain capitalized terms.
 
Securities Offered.........  The Collateralized Mortgage Bonds (the "Bonds")
                             offered hereby will be secured by mortgage
                             collateral (the "Mortgage Collateral") consisting
                             of one or more of the following: (i) fixed-rate,
                             first or junior lien mortgage loans secured by one-
                             to four-family residential properties (the "Fixed
                             Rate Pledged Mortgages"), (ii) floating-rate, first
                             or junior lien mortgage loans secured by one-to
                             four-family residential properties (the "Floating
                             Rate Pledged Mortgages" and, together with the
                             Fixed Rate Pledged Mortgages, the "Pledged
                             Mortgages"), (iii) mortgage pass-through securities
                             (the "Agency Securities") issued or guaranteed by
                             the Government National Mortgage Corporation
                             ("GNMA"), the Federal National Mortgage Corporation
                             ("FNMA") or the Federal Home Loan Mortgage
                             Corporation ("FHLMC"), (iv) other mortgage pass-
                             through certificates or collateralized mortgage
                             obligations (the "Private Mortgage-Backed
                             Securities"), (v) a combination of such Agency
                             Securities and/or Private Mortgage-Backed
                             Securities (collectively, the "Certificates") or
                             (vi) a combination of Certificates and Pledged
                             Mortgages. A Series of Bonds also may be secured by
                             certain cash accounts, insurance policies, surety
                             bonds, guaranteed investment contracts, cross-
                             collateralization, reinvestment income, guaranties
                             or letters of credit to the extent described herein
                             and in the related Prospectus Supplement. See
                             "SECURITY FOR THE BONDS" herein.
 
                             The Bonds will be issued from time to time in one
                             or more Series pursuant to Indentures (as defined
                             herein) between each Issuer and a bank or trust
                             company acting as trustee (the "Bond Trustee") for
                             the holders of the Bonds of each Series (the
                             "Bondholders") under the relevant Indenture. Each
                             Series of Bonds will consist of one or more Classes
                             of Bonds which may include one or more Classes of
                             Deferred Interest Bonds (as defined herein). A
                             Series of Bonds may include one or more Classes of
                             Senior Bonds (collectively, the "Senior Bonds") and
                             one or more Classes of Subordinated Bonds
                             (collectively, the "Subordinated Bonds"). Unless
                             otherwise specified in the related Prospectus
                             Supplement, the Bonds represent obligations solely
                             of the Issuer and are not insured or guaranteed by
                             any other person or entity. See "DESCRIPTION OF THE
                             BONDS" herein. Bonds of a Class may differ from
                             Bonds of other Classes of the same Series in the
                             amounts allocated to and the priority of principal
                             payments and interest rate or in such other manner
                             as specified in the related Prospectus Supplement.
                             A Series of Bonds may include one or more Classes
                             of Bonds entitled to (i) principal distributions,
                             with disproportionate, nominal or no interest
                             distributions or (ii) interest distributions, with
                             disproportionate, nominal or no principal
                             distributions. A Series of Bonds may be insured or
                             guaranteed as to payment of principal and interest
                             by a third-party insurer or guarantor, or secured
                             by certain cash accounts, insurance policies,
                             surety bonds, guaranteed investment contracts,
                             cross-collateral-
 
                                        4
<PAGE>   65
 
                             ization, reinvestment income, guaranties, letters
                             of credit or derivative arrangements, in each case
                             to the extent provided herein and in the related
                             Prospectus Supplement.
 
Issuer.....................  The Issuer with respect to each Series of Bonds
                             will be a trust established by Sequoia Mortgage
                             Funding Corporation, a Delaware corporation (the
                             "Company"), for the sole purpose of issuing such
                             Series of Bonds and engaging in transactions
                             relating thereto. The Company is a wholly owned
                             limited purpose finance subsidiary of Redwood
                             Trust, Inc. ("Redwood Trust"). Redwood Trust, a
                             Maryland corporation, has elected to be taxed as a
                             real estate investment trust under the Internal
                             Revenue Code of 1986, as amended (the "Code"). Each
                             trust that is formed to act as an Issuer will be
                             created pursuant to a deposit trust agreement
                             between the Company, acting as depositor (in such
                             capacity, the "Depositor"), and a bank, trust
                             company, or other fiduciary acting as owner trustee
                             (the "Owner Trustee"). Each trust will be
                             established by the Company solely for the purpose
                             of issuing one Series of Bonds and engaging in
                             transactions relating thereto. Neither Redwood
                             Trust, the Company nor any of their respective
                             affiliates will guarantee or otherwise be obligated
                             to make payments on the Bonds. The Bonds will be
                             obligations solely of their respective Issuers. The
                             assets of each such Issuer, other than those
                             pledged as collateral for the Bonds it issues, are
                             not expected to be significant. See "THE ISSUER"
                             herein.
 
Master Servicer............  The entity or entities named as Master Servicer
                             (each, a "Master Servicer") in the related
                             Prospectus Supplement will act as master servicer
                             with respect to all of the Pledged Mortgages
                             securing a Series of Bonds pursuant to an agreement
                             (each, a "Master Servicing Agreement") among the
                             Master Servicer, the related Issuer and the related
                             Bond Trustee. The Master Servicer will administer
                             and supervise the performance of the entities
                             primarily responsible for servicing the Pledged
                             Mortgages (each, a "Servicer"), who may in turn be
                             administering and supervising the performance of
                             one or more subservicers of such Pledged Mortgages,
                             and will be obligated to perform the obligations of
                             a terminated Servicer or appoint a successor
                             Servicer. See "SERVICING OF THE PLEDGED MORTGAGES"
                             herein.
 
Special Servicer...........  If specified in the related Prospectus Supplement,
                             the Company may appoint a special servicer (each, a
                             "Special Servicer") to service, make certain
                             decisions and take various actions with respect to
                             delinquent or defaulted Pledged Mortgages pledged
                             as security for the related Series of Bonds. See
                             "SERVICING OF THE PLEDGED MORTGAGES -- Special
                             Servicing Agreement" herein.
 
Interest Payments..........  Each Class of Bonds of a Series will bear interest
                             at the rate, or determined in the manner, set forth
                             for such Class in the related Prospectus
                             Supplement. Interest on a Series of Bonds or on a
                             Class of Bonds within a Series may accrue at a
                             fixed rate, a variable rate or a combination
                             thereof, as determined in the manner specified in
                             the related Prospectus Supplement. One or more
                             Classes of Bonds within a Series may be zero coupon
                             bonds. Interest on each Class of Bonds of a Series
                             other than a Class of Deferred Interest Bonds will
                             be paid on the dates specified in the related
                             Prospectus Supplement (each, a "Payment Date"), to
                             holders of record at the close of business on each
                             of the dates specified in such Prospectus
                             Supplement (each, a "Record Date").
 
                                        5
<PAGE>   66
 
                             Interest on each Class of Deferred Interest Bonds
                             of a Series will accrue but will not be paid
                             (except in certain circumstances involving an
                             optional redemption of the Deferred Interest Bonds
                             or as otherwise specified in the related Prospectus
                             Supplement) until the Classes of Bonds specified in
                             the related Prospectus Supplement have been paid in
                             full. Interest accrued but not paid on a Class of
                             Deferred Interest Bonds will be added to the
                             principal thereof on each Payment Date. Each such
                             payment or accrual of interest will include all
                             interest accrued either to, but not including, the
                             related Payment Date or, if so indicated in the
                             related Prospectus Supplement, through a date prior
                             to such Payment Date, as specified in the related
                             Prospectus Supplement. In the latter case, the
                             effective yield to the holders of the Bonds will be
                             reduced to a level below the yield which would
                             apply if interest were paid or accrued to the
                             respective Payment Date. One or more Classes of
                             Bonds of a Series may be subordinated in the right
                             to receive payments of interest (and/or principal
                             or any combination thereof) to one or more other
                             Classes of Bonds of such Series, either throughout
                             the lives of the Bonds of such Class or during
                             specified periods, and, in addition, may be
                             entitled to receive such payments only after the
                             occurrence of certain events specified in the
                             related Prospectus Supplement. See "DESCRIPTION OF
                             THE BONDS -- Payments of Interest" herein.
 
Principal Payments.........  Principal payments on each Series of Bonds will be
                             made on each Payment Date in an aggregate amount
                             equal to the sum of (a) if specified in the related
                             Prospectus Supplement, the amount of interest
                             accrued but not then payable on the Deferred
                             Interest Bonds of the Series, if any, from the
                             prior Payment Date or, if specified in the related
                             Prospectus Supplement, from a date prior to such
                             prior Payment Date, and (b) either (i) the
                             percentage or percentages specified in the related
                             Prospectus Supplement of the funds available for
                             such purpose ("Available Funds") for such Payment
                             Date or (ii) the sum of (x) an amount determined by
                             reference to the aggregate decline in the bond
                             values (the "Bond Values") of the Mortgage
                             Collateral securing the Bonds of such Series in the
                             period (each, a "Due Period") ending prior to such
                             Payment Date (collectively, the "Basic Principal
                             Payment") and (y) the amount, if any, of the spread
                             (the "Spread") specified in the related Prospectus
                             Supplement. The Prospectus Supplement for a Series
                             of Bonds will specify the method or methods used to
                             determine Available Funds for each related Payment
                             Date.
 
                             Payments of principal of the Bonds of a Series will
                             be allocated among the Classes of Bonds of such
                             Series in the manner specified in the related
                             Prospectus Supplement. One or more Classes of Bonds
                             of a Series may be subordinated in the right to
                             receive payments of principal (and/or interest or
                             any combination thereof) to one or more other
                             Classes of Bonds of such Series, either throughout
                             the lives of the Bonds of such Class or during
                             specified periods, and, in addition, may be
                             entitled to receive such payments only after the
                             occurrence of certain events specified in the
                             related Prospectus Supplement. All payments of
                             principal of Bonds of a particular Class will be
                             applied on a pro rata basis among all Bonds of such
                             Class, unless otherwise specified in the related
                             Prospectus Supplement. See "DESCRIPTION OF THE
                             BONDS -- Payments of Principal" herein.
 
                                        6
<PAGE>   67
 
                             The "Bond Value" of an item of Mortgage Collateral
                             represents the principal amount of the Bonds of a
                             Series that, based on certain assumptions and
                             irrespective of prepayments on the Mortgage
                             Collateral, can be supported by scheduled
                             distributions on the Mortgage Collateral, together
                             with (depending on the method used to determine the
                             Bond Value of the Mortgage Collateral) (i)
                             reinvestment earnings thereon at the Assumed
                             Reinvestment Rate (as defined herein) specified in
                             the related Prospectus Supplement and (ii) if
                             applicable, the cash available to be withdrawn from
                             any Reserve Fund (as defined herein) established
                             for such purpose for such Series. The Prospectus
                             Supplement for a Series of Bonds will specify the
                             method or methods and related assumptions used to
                             determine the Bond Values of the Mortgage
                             Collateral securing the Series.
 
                             Unless otherwise provided in the related Prospectus
                             Supplement, the Spread for a Series of Bonds, if
                             applicable, will represent the excess, if any, of
                             the sum of (i) all payments on the related Mortgage
                             Collateral deposited in the related Bond Account
                             (as defined herein) in the Due Period preceding a
                             Payment Date for the Series, (ii) the reinvestment
                             income thereon and (iii) amounts which are required
                             or are permitted to be withdrawn from any Reserve
                             Fund less the sum of (i) all interest payable on
                             the Bonds of such Series on such Payment Date, (ii)
                             the Basic Principal Payment required to be made on
                             the Bonds of such Series on such Payment Date,
                             (iii) an amount reflecting the redemption price of
                             certain Bonds of such Series redeemed, and (iv)
                             certain expenses accrued by the Issuer, during the
                             preceding Due Period.
 
                             The Stated Maturities for the Classes of Bonds
                             comprising a Series are the dates determined by the
                             Company to fall a specified period after the dates
                             on which the Bonds of each such Class will be fully
                             paid assuming (i) timely receipt of scheduled
                             payments (with no prepayments) on the Mortgage
                             Collateral securing such Bonds, (ii) if applicable,
                             such scheduled payments are, upon deposit in the
                             Bond Account, reinvested at the Assumed
                             Reinvestment Rate specified in the related
                             Prospectus Supplement, (iii) no Mortgage Collateral
                             is substituted by the Issuer or the Seller for any
                             of the Mortgage Collateral initially pledged to
                             secure the Bonds of the Series and (iv) if
                             applicable, no portion of the Spread is applied to
                             the payment of the Bonds, unless the related
                             Prospectus Supplement provides otherwise, in which
                             event such Stated Maturities will be based on the
                             assumptions specified in such Prospectus
                             Supplement. If so provided in the related
                             Prospectus Supplement, holders of one or more
                             Classes of Bonds of a Series may have the right, at
                             their option, to receive full payment in respect of
                             such Bonds prior to Stated Maturity, in each case
                             to the extent and subject to the conditions
                             specified in such Prospectus Supplement.
 
                             The Assumed Reinvestment Rate, if applicable, for a
                             Series of Bonds will be set forth in the related
                             Prospectus Supplement and may be any rate permitted
                             by the nationally recognized statistical rating
                             agency or agencies rating such Series of Bonds
                             (each, a "Rating Agency") or a rate provided under
                             a guaranteed investment contract, surety bond or
                             similar arrangement satisfactory to each Rating
                             Agency. If the Assumed Reinvestment Rate is so
                             provided, the related Prospectus Supplement will
                             describe the terms of such arrangement. The rate of
                             prepayments
 
                                        7
<PAGE>   68
 
                             (including for this purpose prepayments resulting
                             from refinancing or liquidations of the Pledged
                             Mortgages or the mortgage loans underlying the
                             Certificates, as the case may be, due to defaults,
                             casualties, condemnations and repurchases by the
                             Seller (as defined herein), the Issuer or Redwood
                             Trust or purchases by the Master Servicer or the
                             Company) on the Mortgage Collateral securing any
                             Series of Bonds will depend on the characteristics
                             of the Pledged Mortgages or the mortgage loans
                             underlying the Certificates, as the case may be, as
                             well as on other factors including, without
                             limitation, homeowner mobility, economic
                             conditions, the presence and enforceability of
                             "due-on-sale" clauses, mortgage market interest
                             rates and the availability of mortgage funds, and
                             no assurance can be given as to the actual
                             prepayment experience of the Mortgage Collateral.
                             The weighted average life of the Bonds of a Series
                             may also be affected by the exercise by the Issuer
                             of its right to substitute other Mortgage
                             Collateral for the Mortgage Collateral originally
                             pledged as security for such Bonds. See
                             "DESCRIPTION OF THE BONDS -- Weighted Average Life
                             of the Bonds" and "SECURITY FOR THE
                             BONDS -- Substitution of Mortgage Collateral"
                             herein.
 
Redemption of Bonds........  The Bonds of each Series will be redeemable under
                             the following circumstances:
 
A. Special Redemption......  The Bonds of a Series or a Class may be subject to
                             special redemption, in whole or in part, as
                             specified in the related Prospectus Supplement.
                             Pursuant to a special redemption, the Issuer will
                             be required to redeem, on the dates specified in
                             such Prospectus Supplement, at 100% of their unpaid
                             principal amount, plus accrued interest,
                             outstanding Bonds of a Series or Class if, as a
                             result of substantial payments of principal on the
                             Pledged Mortgages or on the mortgage loans
                             underlying the Certificates pledged as security for
                             such Series or Class of Bonds or low reinvestment
                             yields, or both, the Bond Trustee determines, based
                             on the assumptions specified in the Indenture, that
                             in the absence of such special redemption the
                             amount of cash expected to be on deposit in the
                             Bond Account on the next Payment Date for such
                             Series of Bonds would be insufficient to make
                             required payments on the Bonds of such Series on
                             such Payment Date. Any such redemption will not
                             exceed the principal amount of Bonds that would
                             otherwise be required to be paid on the next
                             Payment Date out of the principal payments and
                             prepayments so received. See "DESCRIPTION OF THE
                             BONDS -- Special Redemption" herein. Principal
                             payments on a special redemption will be applied to
                             Bonds of a Series in accordance with the priorities
                             specified in the related Prospectus Supplement.
 
B. Optional Redemption.....  If so provided in the related Prospectus
                             Supplement, the Bonds of each Series may be subject
                             to redemption at the option of the Issuer. The
                             Prospectus Supplement for each Series will specify
                             the circumstances, if any, under which the Bonds of
                             such Series may be so redeemed, the manner of
                             effecting such redemption, the conditions to which
                             such redemption are subject and the redemption
                             prices for each Class of Bonds to be redeemed. See
                             "DESCRIPTION OF THE BONDS -- Optional Redemption"
                             herein.
 
Security for the Bonds.....  Each Series of Bonds will be separately secured by
                             collateral consisting of the items set forth below.
                             Unless otherwise provided in the related Prospectus
                             Supplement, the Issuer may substitute other
                             Mortgage Col-
 
                                        8
<PAGE>   69
 
                             lateral for the Mortgage Collateral originally
                             pledged as security for the Bonds of a Series so
                             long as the substitute Mortgage Collateral meets
                             certain criteria. See "SECURITY FOR THE
                             BONDS -- Substitution of Mortgage Collateral"
                             herein.
 
A. Pledged Mortgages.......  In connection with the issuance of a Series of
                             Bonds secured in whole or in part by Pledged
                             Mortgages, the Issuer will pledge and assign to the
                             Bond Trustee a pool of conventional (i.e., not
                             insured or guaranteed by any governmental agency)
                             loans secured by first or junior mortgages or deeds
                             of trust on one- to four-family residential
                             properties. If so specified in the related
                             Prospectus Supplement, the Pledged Mortgages may
                             include cooperative apartment loans ("Cooperative
                             Loans") secured by security interests in shares
                             issued by private, nonprofit, cooperative housing
                             corporations ("Cooperatives") and in the related
                             proprietary leases or occupancy agreements granting
                             exclusive rights to occupy specific dwelling units
                             in such Cooperatives' buildings. See "SECURITY FOR
                             THE BONDS -- The Pledged Mortgages" herein.
 
B. General Attributes of
   Pledged Mortgages.......  The payment terms of the Pledged Mortgages securing
                             a Series of Bonds, if any, will be described in the
                             related Prospectus Supplement and may include any
                             of the following features or combinations thereof
                             or other features described in the related
                             Prospectus Supplement:
 
                             (a) Interest may be payable at a fixed rate, a rate
                                 adjustable from time to time in relation to an
                                 index (which will be specified in the related
                                 Prospectus Supplement), a rate that is fixed
                                 for a period of time or under certain
                                 circumstances and is followed by an adjustable
                                 rate, a rate that otherwise varies from time to
                                 time, or a rate that is convertible from an
                                 adjustable rate to a fixed rate. Changes to an
                                 adjustable rate may be subject to periodic
                                 limitations, maximum rates, minimum rates or a
                                 combination of such limitations. Accrued
                                 interest may be deferred and added to the
                                 principal of a loan for such periods and under
                                 such circumstances as may be specified in the
                                 related Prospectus Supplement. The loan
                                 agreement or promissory note (the "Mortgage
                                 Note") in respect of a Pledged Mortgage may
                                 provide for the payment of interest at a rate
                                 lower than the interest rate (the "Mortgage
                                 Rate") specified in such Mortgage Note for a
                                 period of time or for the life of the loan, and
                                 the amount of any difference may be contributed
                                 from funds supplied by a third party.
 
                             (b) Principal may be payable on a level debt
                                 service basis to fully amortize the loan over
                                 its term, may be calculated on the basis of an
                                 assumed amortization schedule that is
                                 significantly longer than the original term to
                                 maturity or on an interest rate that is
                                 different from the interest rate on the Pledged
                                 Mortgage or may not be amortized during all or
                                 a portion of the original term. Payment of all
                                 or a substantial portion of the principal may
                                 be due on maturity ("balloon payments").
                                 Principal may include interest that has been
                                 deferred and added to the principal balance of
                                 the Pledged Mortgage.
 
                             (c) Monthly payments of principal and interest may
                                 be fixed for the life of the loan, may increase
                                 over a specified period of time or may
 
                                        9
<PAGE>   70
 
                                 change from period to period. Pledged Mortgages
                                 may include limits on periodic increases or
                                 decreases in the amount of monthly payments and
                                 may include maximum or minimum amounts of
                                 monthly payments.
 
                             (d) The Pledged Mortgages generally may be prepaid
                                 at any time without payment of any prepayment
                                 fee, unless otherwise specified in the related
                                 Prospectus Supplement. If so specified in the
                                 related Prospectus Supplement, prepayments of
                                 principal may be subject to a prepayment fee,
                                 which may be fixed for the life of any such
                                 Pledged Mortgage or may decline over time, and
                                 may be prohibited for the life of any such
                                 Pledged Mortgage or for certain periods
                                 ("lockout periods"). Certain Pledged Mortgages
                                 may permit prepayments after expiration of the
                                 applicable lockout period and may require the
                                 payment of a prepayment fee in connection with
                                 any such subsequent prepayment. All or a
                                 portion of any prepayment fee may be payable as
                                 additional interest on the Bonds, if so
                                 specified in the related Prospectus Supplement.
                                 Other Pledged Mortgages may permit prepayments
                                 without payment of a fee unless the prepayment
                                 occurs during specified time periods. The
                                 Pledged Mortgages may include "due-on-sale"
                                 clauses which permit the mortgagee to demand
                                 payment of the entire Pledged Mortgage in
                                 connection with the sale or certain transfers
                                 of the related Mortgaged Property (as defined
                                 below). Other Pledged Mortgages may be
                                 assumable by persons meeting then applicable
                                 underwriting standards. See "MORTGAGE LOAN
                                 PROGRAM -- Underwriting Standards" herein.
 
                             (e) The real property constituting security for
                                 repayment of a Pledged Mortgage (each, a
                                 "Mortgaged Property") may be located in any one
                                 of the fifty states, the District of Columbia,
                                 Guam, Puerto Rico, any other territory of the
                                 United States or such other location as may be
                                 specified in the related Prospectus Supplement.
                                 Unless otherwise specified in the related
                                 Prospectus Supplement, all of the Pledged
                                 Mortgages will be covered by standard hazard
                                 insurance policies insuring against losses due
                                 to fire and various other causes. The Pledged
                                 Mortgages will be covered by Primary Mortgage
                                 Insurance Policies (as defined herein) to the
                                 extent provided in the related Prospectus
                                 Supplement. See "SECURITY FOR THE BONDS -- The
                                 Pledged Mortgages" herein.
 
C. Agency Securities.......  The Agency Securities securing a Series of Bonds
                             will consist of (i) fully modified pass-through
                             mortgage-backed certificates guaranteed as to
                             timely payment of principal and interest by the
                             Government National Mortgage Association ("GNMA
                             Certificates"), (ii) certificates ("Guaranteed
                             Mortgage Pass-Through Certificates") issued and
                             guaranteed as to timely payment of principal and
                             interest by the Federal National Mortgage
                             Association ("FNMA Certificates"), (iii) mortgage
                             participation certificates issued and guaranteed as
                             to timely payment of interest and, unless otherwise
                             specified in the related Prospectus Supplement,
                             ultimate payment of principal by the Federal Home
                             Loan Mortgage Corporation ("FHLMC Certificates"),
                             (iv) stripped mortgage-backed securities
                             representing an undivided interest in all or a part
                             of either the principal distributions (but not the
                             interest distributions) or
 
                                       10
<PAGE>   71
 
                             the interest distributions (but not the principal
                             distributions) or in some specified portion of the
                             principal and interest distributions (but not all
                             of such distributions) on certain GNMA, FNMA or
                             FHLMC Certificates and, unless otherwise specified
                             in the related Prospectus Supplement, guaranteed to
                             the same extent as the underlying securities, (v)
                             another type of pass-through certificate issued or
                             guaranteed by GNMA, FNMA or FHLMC and described in
                             the related Prospectus Supplement or (vi) a
                             combination of such Agency Securities. All GNMA
                             Certificates will be backed by the full faith and
                             credit of the United States. No FHLMC or FNMA
                             Certificates will be backed, directly or
                             indirectly, by the full faith and credit of the
                             United States. See "SECURITY FOR THE
                             BONDS -- Agency Securities" herein.
 
D. Private Mortgage-Backed
  Securities...............  Private Mortgage-Backed Securities may include (a)
                             mortgage pass-through certificates representing
                             beneficial interests in certain mortgage loans or
                             (b) collateralized mortgage obligations secured by
                             such mortgage loans. Private Mortgage-Backed
                             Securities may include stripped mortgage-backed
                             securities representing an undivided interest in
                             all or a part of any of the principal distributions
                             (but not the interest distributions) or the
                             interest distributions (but not the principal
                             distributions) or in some specified portion of the
                             principal and interest distributions (but not all
                             of such distributions) on certain mortgage loans.
                             Although individual mortgage loans underlying a
                             Private Mortgage-Backed Security may be insured or
                             guaranteed by the United States or an agency or
                             instrumentality thereof, they need not be, and the
                             Private Mortgage-Backed Securities themselves will
                             not be so insured or guaranteed. Unless otherwise
                             specified in the Prospectus Supplement relating to
                             a Series of Bonds, payments on the Private
                             Mortgage-Backed Securities will be distributed
                             directly to the Bond Trustee as registered owner of
                             such Private Mortgage-Backed Securities. See
                             "SECURITY FOR THE BONDS -- Private Mortgage-Backed
                             Securities" herein.
 
                             The related Prospectus Supplement for a Series of
                             Bonds will specify, among other things, the
                             approximate aggregate principal amount and type of
                             any Private Mortgage-Backed Securities to be
                             included in the Mortgage Collateral for such Series
                             and, as to any such Private Mortgage-Backed
                             Securities comprising a significant portion of the
                             Mortgage Collateral, to the extent such information
                             is known to the Issuer, will in general include the
                             following: (i) certain characteristics of the
                             mortgage loans that comprise the underlying assets
                             for the Private Mortgage-Backed Securities
                             including (A) the payment features of such mortgage
                             loans, (B) the approximate aggregate principal
                             amount of the underlying mortgage loans that are
                             insured or guaranteed by a governmental entity, (C)
                             the servicing fee or range of servicing fees with
                             respect to the mortgage loans and (D) the minimum
                             and maximum stated maturities of the mortgage loans
                             at origination; (ii) the maximum original term to
                             stated maturity of the Private Mortgage-Backed
                             Securities; (iii) the weighted average term to
                             stated maturity of the Private Mortgage-Backed
                             Securities; (iv) the pass-through or certificate
                             rate or ranges thereof for the Private
                             Mortgage-Backed Securities; (v) the weighted
                             average pass-through or certificate rate of the
                             Private Mortgage-Backed Securities; (vi) the issuer
                             of the Private Mortgage-Backed Securities (the
                             "PMBS Issuer"), the servicer of the Private
                             Mortgage-Backed
 
                                       11
<PAGE>   72
 
                             Securities (the "PMBS Servicer") and the trustee of
                             the Private Mortgage-Backed Securities (the "PMBS
                             Trustee"); (vii) certain characteristics of credit
                             support, if any, such as reserve funds, insurance
                             policies, surety bonds, letters of credit or
                             guaranties relating to the mortgage loans
                             underlying the Private Mortgage-Backed Securities
                             or to such Private Mortgage-Backed Securities
                             themselves; (viii) the terms on which underlying
                             mortgage loans for such Private Mortgage-Backed
                             Securities may, or are required to, be repurchased
                             prior to stated maturity and the terms of any
                             redemption; and (ix) the terms on which substitute
                             mortgage loans may be delivered to replace those
                             initially deposited with the PMBS Trustee. See
                             "SECURITY FOR THE BONDS -- Private Mortgage-Backed
                             Securities" herein.
 
E. Bond and Distribution
  Accounts.................  All scheduled monthly principal and interest
                             payments and all prepayments received with respect
                             to the Mortgage Collateral for a Series of Bonds,
                             other than amounts not required to be remitted to
                             the Bond Trustee, such as amounts retained by the
                             Master Servicer, any Servicer or any subservicer of
                             Pledged Mortgages as servicing compensation, to pay
                             certain insurance premiums or to reimburse the
                             Master Servicer or any Servicer for certain
                             advances it has made, will be remitted to an
                             account (the "Bond Account") to be established as
                             an Eligible Account (as defined herein) on the
                             closing date for the sale of such Series of Bonds
                             (the "Closing Date"). All principal and interest
                             distributions received from the Mortgage Collateral
                             and remitted to the Bond Account, other than
                             amounts, if any, subsequently withdrawn to
                             reimburse the Master Servicer or any Servicer for
                             certain non-recoverable advances it has made,
                             together with (i) the amount of cash, if any,
                             initially deposited in the Bond Account by the
                             Issuer, (ii) if applicable, all amounts withdrawn
                             from any related Reserve Funds, (iii) any Insurance
                             Proceeds and Liquidation Proceeds (as such terms
                             are defined herein) and (iv) if so specified in the
                             related Prospectus Supplement, all reinvestment
                             income earned thereon, will be available transfer
                             to the Distribution Account (as defined herein) for
                             application to the payment of the principal of, and
                             interest on, such Series of Bonds as described in
                             the related Prospectus Supplement.
 
                             On or prior to the Closing Date, the Bond Trustee
                             will establish an account (the "Distribution
                             Account") which shall be an Eligible Account (as
                             defined herein) maintained with the Bond Trustee
                             for the benefit of the Bondholders of the related
                             Series. On or prior to a date specified in the
                             related Prospectus Supplement and preceding each
                             related Payment Date (each, a "Distribution Account
                             Deposit Date"), the Master Servicer shall withdraw
                             from the Bond Account the amount required to be
                             distributed to Bondholders on such Payment Date
                             (the "Bond Distribution Amount"), to the extent of
                             funds available for such purpose on deposit
                             therein, and will deposit such amount in the
                             Distribution Account.
 
                             Any funds remaining in the Bond Account on a
                             Payment Date, other than amounts not constituting
                             Available Funds, if so specified in the related
                             Prospectus Supplement, after (i) the reimbursement
                             of the Master Servicer or any Servicer for
                             non-recoverable advances made by it, (ii) each
                             required payment of interest and principal to
                             Bondholders of
 
                                       12
<PAGE>   73
 
                             the related Series has been paid in full, (iii) if
                             applicable, any Reserve Fund has been funded in the
                             manner described in the related Prospectus
                             Supplement and (iv) the payment of certain expenses
                             relating to such Series of Bonds, will be subject
                             to withdrawal upon the order of the Issuer. See
                             "SECURITY FOR THE BONDS -- Bond and Distribution
                             Accounts" and "SERVICING OF THE PLEDGED MORTGAGES"
                             herein.
 
Pre-Funding Accounts.......  If so specified in the related Prospectus
                             Supplement, the assets of the Issuer will include
                             the funds on deposit in an account (a "Pre-Funding
                             Account") which will be used to purchase additional
                             Mortgage Collateral during a period specified in
                             such Prospectus Supplement (such period, the
                             "Funding Period"). See "SECURITY FOR THE
                             BONDS -- Pre-Funding Accounts" herein.
 
Credit Enhancement.........  The Mortgage Collateral securing a Series of Bonds
                             or the Bonds of one or more Classes in the related
                             Series may have the benefit of one or more types of
                             credit enhancement as described in the related
                             Prospectus Supplement. The protection against
                             losses afforded by any such credit enhancement may
                             be limited. The type, characteristics and amount of
                             credit enhancement will be determined based on the
                             characteristics of the Pledged Mortgages underlying
                             or comprising the Mortgage Collateral and will be
                             established on the basis of requirements of each
                             Rating Agency. In addition, one or more Classes of
                             Bonds of a Series may be guaranteed as to payment
                             of principal and interest by a third party insurer
                             or guarantor, to the extent provided in the related
                             Prospectus Supplement. See "CREDIT ENHANCEMENT"
                             herein.
 
A. Subordination...........  A Series of Bonds may consist of one or more
                             Classes of Senior Bonds and one or more Classes of
                             Subordinated Bonds. The rights of the holders of
                             the Subordinated Bonds of a Series (the
                             "Subordinated Bondholders") to receive payments of
                             principal and/or interest (or any combination
                             thereof) will be subordinated to such rights of the
                             holders of the Senior Bonds of the same Series (the
                             "Senior Bondholders") to the extent described in
                             the related Prospectus Supplement. This
                             subordination is intended to enhance the likelihood
                             of regular receipt by the Senior Bondholders of the
                             full amount of their scheduled payments of
                             principal and/or interest. The protection afforded
                             to the Senior Bondholders of a Series by means of
                             the subordination feature will be accomplished by
                             (i) the preferential right of such holders to
                             receive, prior to any payment being made on the
                             related Subordinated Bonds, the amounts of
                             principal and/or interest due them on each Payment
                             Date out of the funds available for payment on such
                             date in the related Distribution Account and, to
                             the extent described in the related Prospectus
                             Supplement, by the right of such holders to receive
                             future payments that would otherwise have been
                             payable to the Subordinated Bondholders; or (ii) as
                             otherwise described in the related Prospectus
                             Supplement. If so specified in the related
                             Prospectus Supplement, subordination may apply only
                             in the event of certain types of losses not covered
                             by other forms of credit support, such as hazard
                             losses not covered by standard hazard insurance
                             policies or losses due to the bankruptcy or fraud
                             of the borrower. The related Prospectus Supplement
                             will set forth information concerning, among other
                             things, the amount of subordination of a Class or
                             Classes of Subordinated Bonds in a Series, the
                             circumstances in which such
 
                                       13
<PAGE>   74
 
                             subordination will be applicable and the manner, if
                             any, in which the amount of subordination will
                             decrease over time. See "CREDIT
                             ENHANCEMENT -- Subordination" herein.
 
B. Reserve Funds...........  If so specified in the related Prospectus
                             Supplement, the Issuer will deposit in one or more
                             Reserve Funds to be established with the Bond
                             Trustee, cash, certificates of deposit, letters of
                             credit, surety bonds, guaranteed investment
                             contracts, reinvestment income or any combination
                             thereof, which may be used by the Bond Trustee to
                             make payments on such Series of Bonds to the extent
                             funds are not otherwise available. The related
                             Prospectus Supplement will specify the manner of
                             funding the related Reserve Fund and the conditions
                             under which the amounts in any such Reserve Fund
                             will be used to make payments to holders of Bonds
                             of a particular Class or released from the lien of
                             the related Indenture. See "CREDIT
                             ENHANCEMENT -- Reserve Funds" herein.
 
C. Mortgage Pool Insurance
  Policy...................  If so specified in the related Prospectus
                             Supplement, a mortgage pool insurance policy or
                             policies (the "Mortgage Pool Insurance Policy") may
                             be obtained and maintained for a Series of Bonds
                             secured by Pledged Mortgages, which shall be
                             limited in scope, covering defaults on such Pledged
                             Mortgages in an initial amount equal to a specified
                             percentage of the aggregate principal balance of
                             all Pledged Mortgages included in the related
                             mortgage pool as of the first day of the month of
                             issuance of the related Series of Bonds or such
                             other date as is specified in the related
                             Prospectus Supplement (the "Cut-off Date"). See
                             "CREDIT ENHANCEMENT -- Mortgage Pool Insurance
                             Policies" herein.
 
D. Special Hazard Insurance
  Policy...................  If so specified in the related Prospectus
                             Supplement, a special hazard insurance policy or
                             policies (the "Special Hazard Insurance Policy")
                             may be obtained and maintained for a Series of
                             Bonds secured by Pledged Mortgages, covering
                             certain physical risks that are not otherwise
                             insured against by standard hazard insurance
                             policies. Each Special Hazard Insurance Policy will
                             be limited in scope and will cover losses pursuant
                             to the provisions of each such Special Hazard
                             Insurance Policy as described in the related
                             Prospectus Supplement. See "CREDIT
                             ENHANCEMENT -- Special Hazard Insurance Policies"
                             herein.
 
E. Bankruptcy Bond.........  If so specified in the related Prospectus
                             Supplement, a bankruptcy bond or bonds (the
                             "Bankruptcy Bond") may be obtained for a Series of
                             Bonds secured by Pledged Mortgages to cover certain
                             losses resulting from action that may be taken by a
                             bankruptcy court in connection with a Pledged
                             Mortgage. The level of coverage and the limitations
                             in scope of each Bankruptcy Bond will be specified
                             in the related Prospectus Supplement. See "CREDIT
                             ENHANCEMENT -- Bankruptcy Bonds" herein.
 
F. Bond Insurance Policies,
  Surety Bonds and
  Guarantees...............  If so specified in the related Prospectus
                             Supplement, credit enhancement for one or more
                             Classes of Bonds of a Series may be provided by
                             insurance policies or surety bonds (each, a "Bond
                             Insurance Policy")
 
                                       14
<PAGE>   75
 
                             issued by one or more insurance companies or
                             sureties. Such bond guarantee insurance or surety
                             bond will guarantee timely payments of interest
                             and/or full payment of principal on the basis of a
                             schedule of principal payments set forth in or
                             determined in the manner specified in the related
                             Prospectus Supplement. If specified in the related
                             Prospectus Supplement, one or more surety bonds,
                             insurance policies or third-party guarantees may be
                             used to provide coverage for the risks of default
                             or types of loses set forth in such Prospectus
                             Supplement. See "CREDIT ENHANCEMENT -- Bond
                             Insurance Policies, Surety Bonds and Guarantees"
                             herein.
 
G. Letter of Credit........  If so specified in the related Prospectus
                             Supplement, credit enhancement may be provided for
                             a Series of Bonds secured by Pledged Mortgages by
                             one or more letters of credit. A letter of credit
                             may provide limited protection against certain
                             losses in addition to or in lieu of other credit
                             enhancement, such as losses resulting from
                             delinquent payments on the Pledged Mortgages
                             securing the related Series of Bonds, losses from
                             risks not covered by standard hazard insurance
                             policies, losses due to bankruptcy of a borrower
                             and application of certain provisions of the
                             federal Bankruptcy Code, and losses due to denial
                             of insurance coverage due to misrepresentations
                             made in connection with the origination or sale of
                             a Pledged Mortgage. The issuer of the letter of
                             credit (the "L/C Bank") will be obligated to honor
                             demands with respect to such letter or credit, to
                             the extent of the amount available thereunder to
                             provide funds under the circumstances and subject
                             to such conditions as are specified in the related
                             Prospectus Supplement. The liability of the L/C
                             Bank under its letter of credit will be reduced by
                             the amount of unreimbursed payments thereunder.
 
                             The maximum liability of a L/C Bank under its
                             letter of credit will be an amount equal to a
                             percentage specified in the related Prospectus
                             Supplement of the initial aggregate outstanding
                             principal balance of the Pledged Mortgages securing
                             the related Series of Bonds or one or more Classes
                             of Bonds of such Series (the "L/C Percentage"). The
                             maximum amount available at any time to be paid
                             under a letter of credit will be determined in the
                             manner specified therein and in the related
                             Prospectus Supplement. See "CREDIT
                             ENHANCEMENT -- Letter of Credit" herein.
 
H. Cross-Collateralization...If so specified in the related Prospectus
                             Supplement, separate Classes of such Series may be
                             secured by separate groups of Mortgage Collateral.
                             In such case, credit support may be provided by a
                             cross-collateralization feature which requires that
                             payments be made with respect to Bonds secured by
                             one or more groups of Mortgage Collateral prior to
                             payments to Bonds secured by other groups of
                             Mortgage Collateral within the same Series. See
                             "CREDIT ENHANCEMENT -- Cross-Collateralization"
                             herein.
 
                             If so specified in the related Prospectus
                             Supplement, the coverage provided by one or more of
                             the forms of credit enhancement described in this
                             Prospectus may apply concurrently to two or more
                             separate Series of Bonds. If applicable, the
                             related Prospectus Supplement will identify the
                             Series of Bonds to which such credit enhancement
                             relates and the manner of determining the amount of
                             coverage provided to such Series of Bonds thereby
                             and of the application of such coverage to the
                             identified
 
                                       15
<PAGE>   76
 
                             Series of Bonds. See "CREDIT
                             ENHANCEMENT -- Cross-Collateralization" herein.
 
I. Over-Collateralization... If so specified in the related Prospectus
                             Supplement, credit enhancement may consist of
                             over-collateralization whereby the aggregate
                             principal balance of the related Mortgage
                             Collateral exceeds the aggregate principal balance
                             of the Bonds of the related Series. Such
                             over-collateralization may exist on the related
                             Closing Date or develop thereafter as a result of
                             the application of a portion of the interest
                             payment on each Pledged Mortgage or Certificate, as
                             the case may be, as an additional payment in
                             respect of principal to reduce the principal
                             balance of a certain Class or Classes of Bonds of
                             such Series and, thus, accelerate the rate of
                             payment of principal on such Class or Classes of
                             Bonds. See "CREDIT ENHANCEMENT -- Over-
                             Collateralization" herein.
 
J. Excess Spread...........  "Excess Spread" refers to the positive spread that
                             may exist, to the extent specified in the related
                             Prospectus Supplement, between the weighted average
                             of the interest rates (less servicing or other
                             applicable fees) on the Mortgage Collateral and the
                             weighted average of the interest rates on the
                             Bonds. Whether at any time such positive spread
                             exists will depend on a variety of factors,
                             including, with respect to a Series of Bonds with
                             respect to which both the Bonds and the Mortgage
                             Collateral bear interest at adjustable rates, the
                             relationship of the movements in the indices
                             applicable to the Mortgage Collateral and those
                             applicable to the Bonds, over which no prediction
                             can be made or assurance given.
 
                             If so specified in the related Prospectus
                             Supplement, the coverage provided by one or more of
                             the forms of credit enhancement described in this
                             Prospectus may apply concurrently to two or more
                             separate Series of Bonds. If applicable, the
                             related Prospectus Supplement will identify the
                             Series of Bonds to which such credit enhancement
                             relates and the manner of determining the amount of
                             coverage provided to such Series of Bonds thereby
                             and of the application of such coverage to the
                             identified Series of Bonds.
 
K. Minimum Principal
   Payment Agreement.......  If so specified in the related Prospectus
                             Supplement, an Issuer may enter into an agreement
                             with an institution pursuant to which such
                             institution will provide such funds as may be
                             necessary to enable such Issuer to make principal
                             payments on the Bonds of the related Series at a
                             minimum rate set forth in such Prospectus
                             Supplement. See "CREDIT ENHANCEMENT -- Minimum
                             Principal Payment Agreement" herein.
 
L. Derivative
Arrangements...............  If so specified and to the extent described in the
                             related Prospectus Supplement, one or more
                             derivative arrangements may be used to support
                             payments on the Bonds. A derivative arrangement is
                             a contract or agreement, the price of which is
                             directly dependent upon (i.e., "derived from") the
                             value of one or more underlying assets. Derivatives
                             involve rights or obligations based on the
                             underlying asset, but do not necessarily result in
                             a transfer of the underlying asset. Derivative
                             arrangements include swap agreements, interest rate
                             swaps, interest rate caps, interest rate floors,
                             interest rate collars and currency swap agree-
 
                                       16
<PAGE>   77
 
                             ments. See "CREDIT ENHANCEMENT -- Derivative
                             Arrangements" herein.
 
Advances...................  The Master Servicer and each Servicer may be
                             obligated to advance amounts (each, an "Advance")
                             corresponding to delinquent interest and/or
                             principal payments on the Pledged Mortgages
                             securing a Series of Bonds (including, in the case
                             of Cooperative Loans, unpaid maintenance fees or
                             other charges under the related proprietary lease)
                             until the date, as specified in the related
                             Prospectus Supplement, following the date on which
                             the related Mortgaged Property is sold at a
                             foreclosure sale or the related Pledged Mortgages
                             are otherwise liquidated. Any obligation to make
                             Advances may be subject to limitations as specified
                             in the related Prospectus Supplement. If so
                             specified in the related Prospectus Supplement,
                             Advances may be drawn from a cash account available
                             for such purpose as described in such Prospectus
                             Supplement. Advances will be reimbursable to the
                             extent described under "SERVICING OF THE PLEDGED
                             MORTGAGES -- Advances and Other Amounts Payable by
                             Master Servicer" herein and " -- Advances" in the
                             related Prospectus Supplement.
 
                             In the event the Master Servicer or Servicer fails
                             to make a required Advance, the Bond Trustee may be
                             obligated to advance such amounts otherwise
                             required to be advanced by the Master Servicer or
                             Servicer. See "SERVICING OF PLEDGED
                             MORTGAGES -- Advances and Other Amounts Payable by
                             Master Servicer and Servicers" herein.
 
Tax Status of the Bonds....  The Bonds, when beneficially owned by someone other
                             than Redwood Trust or one of its qualified real
                             estate investment trust ("REIT") subsidiaries (as
                             defined in section 856(i) of the Code), will
                             constitute indebtedness for federal income tax
                             purposes and not an ownership interest in the
                             Issuer or the Collateral. See "FEDERAL INCOME TAX
                             CONSEQUENCES" herein and in the related Prospectus
                             Supplement for information concerning the material
                             federal tax consequences of an investment in the
                             Bonds.
 
Use of Proceeds............  The net proceeds to be received from the sale of
                             the Bonds of each Series will be applied by the
                             Company to the purchase or acquisition of the
                             related Mortgage Collateral or will be used by the
                             Company for general corporate purposes. The
                             Mortgage Collateral pledged to secure a Series of
                             Bonds will either be contributed to the Company's
                             capital by Redwood Trust (or an affiliate) or
                             acquired by the Company from Redwood Trust (or an
                             affiliate) and deposited with the Issuer of such
                             Series by the Company. See "USE OF PROCEEDS"
                             herein.
 
Ratings....................  It is a condition to the issuance of each Series of
                             Bonds that the Bonds of such Series to be offered
                             hereunder be rated in one of the four highest
                             rating categories by at least one nationally
                             recognized statistical rating organization. A
                             rating is not a recommendation to purchase, hold or
                             sell Bonds inasmuch as such rating does not comment
                             as to market price or suitability for a particular
                             investor. Ratings of Bonds will address the
                             likelihood of the payment of principal and interest
                             thereon pursuant to their terms. There can be no
                             assurance that a rating will remain for a given
                             period of time or that a rating will not be lowered
                             or withdrawn entirely by a rating agency if in its
                             judgment circumstances in the future so warrant.
                             See "RATINGS" herein. For more detailed information
 
                                       17
<PAGE>   78
 
                             regarding the ratings assigned to any Class of a
                             particular Series of Bonds, see "SUMMARY OF
                             TERMS -- Ratings" and "RATINGS" in the related
                             Prospectus Supplement.
 
Legal Investment...........  The Prospectus Supplement for each Series of Bonds
                             will specify which, if any, of the Classes of Bonds
                             offered thereby will constitute "mortgage related
                             securities" for purposes of the Secondary Mortgage
                             Market Enhancement Act of 1984 ("SMMEA"). Classes
                             of Bonds that qualify as "mortgage-related
                             securities" will be legal investments for certain
                             types of institutional investors to the extent
                             provided in SMMEA, subject, in any case, to any
                             other regulations that may govern investments by
                             such institutional investors. Institutions whose
                             investment activities are subject to review by
                             federal or state authorities should consult with
                             their counsel or the applicable authorities to
                             determine whether an investment in a particular
                             Class of Bonds of a Series (whether or not such
                             Class constitutes a "mortgage-related security")
                             complies with applicable guidelines, policy
                             statements or restrictions. See "LEGAL INVESTMENT"
                             herein.
 
ERISA Matters..............  Generally, plans that are subject to the
                             requirements of the Employee Retirement Income
                             Security Act of 1974, as amended ("ERISA"), and the
                             Internal Revenue Code of 1986, as amended (the
                             "Code"), are permitted to purchase instruments,
                             like the Bonds, that are debt under applicable
                             state law and have no "substantial equity
                             features". If the Bonds are deemed to be equity
                             interests and no statutory, regulatory or
                             administrative exemption applies, the Issuer will
                             hold plan assets by reason of a Plan's investment
                             in the Bonds. Accordingly, any Plan fiduciary
                             considering whether to purchase the Bonds on behalf
                             of a Plan should consult with its counsel regarding
                             the applicability of the provisions of ERISA and
                             the Code and the availability of any exemptions.
                             See "ERISA MATTERS" herein.
 
Risk Factors...............  For a discussion of certain risks associated with
                             an investment in the Bonds, see "RISK FACTORS"
                             commencing on page 19 herein and in the related
                             Prospectus Supplement.
 
                                       18
<PAGE>   79
 
                                  RISK FACTORS
 
     Investors should consider, among other things, the following factors in
connection with an investment in the Bonds.
 
RISKS ASSOCIATED WITH NATURE OF PLEDGED MORTGAGES
 
     FACTORS WHICH MAY ADVERSELY AFFECT PROPERTY VALUES.  There are several
factors that could adversely affect the value of Mortgaged Properties such that
the outstanding balance of the related Pledged Mortgages would equal or exceed
the value of the Mortgaged Properties. Among the factors that could adversely
affect the value of the Mortgaged Properties are an overall decline in the
residential real estate market in the areas in which the Mortgaged Properties
are located or a decline in the general condition of the Mortgaged Properties as
a result of failure of borrowers to maintain adequately the Mortgaged Properties
or of natural disasters that are not necessarily covered by insurance, such as
earthquakes and floods. If such a decline occurs, the actual rates of
delinquencies, foreclosures and losses on the Pledged Mortgages could be higher
than those currently experienced in the mortgage lending industry in general.
Losses on such Pledged Mortgages that are not otherwise covered by the credit
enhancement described in the applicable Prospectus Supplement will be borne by
the holder of one or more classes of Bonds of the related Series.
 
     DELAYS DUE TO LIQUIDATION.  Even assuming that the Mortgaged Properties
provide adequate security for the Pledged Mortgages, substantial delays could be
encountered in connection with the liquidation of defaulted Pledged Mortgages
and corresponding delays in the receipt of related proceeds by Bondholders could
occur. An action to foreclose on a Mortgaged Property securing a Pledged
Mortgage is regulated by state statutes and rules and is subject to many of the
delays and expenses of other lawsuits if defenses or counterclaims are
interposed, sometimes requiring several years to complete. Furthermore, in some
states an action to obtain a deficiency judgment is not permitted following a
nonjudicial sale of a Mortgaged Property. In the event of a default by a
borrower, these restrictions, among other things, may impede the ability of the
Master Servicer to foreclose on or sell the Mortgaged Property or to obtain
liquidation proceeds sufficient to repay all amounts due on the related Pledged
Mortgage. In addition, the Master Servicer will be entitled to deduct from
related liquidation proceeds all expenses reasonably incurred in attempting to
recover amounts due on defaulted Pledged Mortgages and not yet repaid, including
legal fees and costs of legal action, real estate taxes and maintenance and
preservation expenses.
 
     DISPROPORTIONATE EFFECT OF LIQUIDATION EXPENSES.  Liquidation expenses with
respect to defaulted loans do not vary directly with the outstanding principal
balance of the loan at the time of default. Therefore, assuming that a servicer
took the same steps in realizing upon a defaulted loan having a small remaining
principal balance as it would in the case of a defaulted loan having a large
remaining principal balance, the amount realized after expenses of liquidation
would be smaller as a percentage of the outstanding principal balance of the
small loan than would be the case with the defaulted loan having a large
remaining principal balance.
 
     NATURE OF SECURITY PROVIDED BY JUNIOR LIENS.  Certain Pledged Mortgages may
be secured by second liens on the related Mortgaged Properties. As to Pledged
Mortgages secured by second mortgages, the proceeds from any liquidation,
insurance or condemnation proceedings will be available to satisfy the
outstanding balance of such Pledged Mortgages only to the extent that the claims
of such senior mortgages have been satisfied in full, including any related
foreclosure costs. In addition, the holder of a Pledged Mortgage secured by a
junior mortgage may not foreclose on the Mortgaged Property unless it forecloses
subject to the senior mortgages, in which case it must either pay the entire
amount due on the senior mortgages to the senior mortgagees at or prior to the
foreclosure sale or undertake the obligation to make payments on the senior
mortgages in the event the mortgagor is in default thereunder. The Issuer will
not have any source of funds to satisfy the senior mortgages or make payments
due to the senior mortgagees, although the Master Servicer or Servicer may, at
its option, advance such amounts to the extent deemed recoverable and prudent.
In the event that such proceeds from a foreclosure or similar sale of the
related Mortgaged Property are insufficient to satisfy all senior liens and the
Pledged Mortgage in the aggregate, the Issuer, as the holder of the junior lien,
and, accordingly, Holders of one or more Classes of the Bonds, to the extent not
 
                                       19
<PAGE>   80
 
covered by credit enhancement, are likely to (i) incur losses in jurisdictions
in which a deficiency judgment against the borrower is not available, and (ii)
incur losses if any deficiency judgment obtained is not realized upon. In
addition, the rate of default of second mortgage loans may be greater than that
of mortgage loans secured by first liens on comparable properties.
 
PREPAYMENT AND YIELD CONSIDERATIONS; REINVESTMENT RISK
 
     The rate of payments of principal, including prepayments (including for
this purpose prepayments resulting from refinancing or liquidations of the
Pledged Mortgages or the mortgage loans underlying the Certificates, as the case
may be, due to defaults, casualties, condemnations and repurchases by the
Seller, the Issuer or Redwood Trust or purchases by the Master Servicer or the
Company), on the Mortgage Collateral securing a Series of Bonds will directly
affect the weighted average life of such Series of Bonds. The "weighted average
life" of a security refers to the average length of time, weighted by principal,
that will elapse from the date of issuance to the date each dollar of principal
is repaid to the investor. The yields to maturity and weighted average lives of
the Bonds will be affected primarily by the amount and timing of principal
payments received on or in respect of the Mortgage Collateral securing the
related Series of Bonds. The "yield to maturity" of a security refers to the
investment rate of return on such security if held to maturity. A Series of
Bonds may include one or more Classes of Deferred Interest Bonds with respect to
which certain accrued interest will not be paid but rather will be added to the
principal balance thereof and, as a result, yields on such Bonds will be
sensitive to (a) the provisions of such Deferred Interest Bonds relating to the
timing of payments of interest thereon and (b) if such Deferred Interest Bonds
accrue interest at a variable or adjustable rate, changes in such rate.
 
     The rate of prepayments with respect to conventional mortgage loans has
fluctuated significantly in recent years. The rate of payment of principal,
including prepayments, on the Pledged Mortgages or the mortgage loans underlying
the Certificates, as the case may be, may be influenced by a variety of
economic, geographic, social, tax, legal and other factors. In general, if
prevailing interest rates fall significantly below the Mortgage Rates borne by
the mortgage loans underlying the Certificates or the Pledged Mortgages, such
mortgage loans or Pledged Mortgages are likely to be subject to higher
prepayment rates than if prevailing interest rates remain at or above such
Mortgage Rates. Conversely, if prevailing interest rates rise appreciably above
the Mortgage Rates borne by the mortgage loans underlying the Certificates or
the Pledged Mortgages, such mortgage loans or the Pledged Mortgages are likely
to experience a lower prepayment rate than if prevailing interest rates remain
at or below such Mortgage Rates. However, there can be no assurance that such
will be the case. In addition, the yields to maturity and weighted average lives
of the Bonds of a Series will be affected by the distribution of amounts
remaining in any Pre-Funding Account following the end of the related Funding
Period. In each case, Bondholders may be unable to reinvest such payments in
securities of comparable quality having interest rates similar to those borne by
such Bonds. It is possible that yields on any such reinvestments will be lower,
and may be significantly lower, than the yields on such Bonds.
 
     The extent to which the yields to maturity of the Bonds of a Series may
vary from the anticipated yields will depend upon the degree to which such Bonds
are purchased at a discount or premium, and the degree to which the timing of
payments thereon is sensitive to the rate of payments of principal, including
prepayments, on the related Mortgage Collateral. The timing of changes in the
rate of prepayments on such Mortgage Collateral may significantly affect an
investor's actual yield to maturity, even if the average rate of principal
payments is consistent with an investor's expectation. The Prospectus Supplement
relating to a Series of Bonds will discuss in greater detail the effect of the
rate and timing of principal payments (including prepayments), delinquencies and
losses on the yield, weighted average lives and maturities of such Bonds.
 
ENVIRONMENTAL RISKS
 
     Real property pledged as security to a lender may be subject to certain
environmental risks. Under the laws of certain states, contamination of a
property may give rise to a lien on the property to assure the costs of cleanup.
In several states, such a lien has priority over the lien of an existing
mortgage against such property. In addition, under the laws of some states and
under the federal Comprehensive Environmental Response Compensation and
Liability Act of 1980 ("CERCLA"), a lender may be liable, as an "owner" or
"operator",
 
                                       20
<PAGE>   81
 
for costs of addressing releases or threatened releases of hazardous substances
that require remedy at a property, if agents or employees of the lender have
become sufficiently involved in the operations of the borrower, regardless of
whether the environmental damage or threat was caused by a prior owner. Such
costs could result in a loss to the holders of one or more Classes of a Series
of Bonds. A lender also risks such liability on foreclosure of the related
property. See "CERTAIN LEGAL ASPECTS OF PLEDGED MORTGAGES -- Environmental
Risks" herein.
 
LIMITED LIQUIDITY OF INVESTMENT
 
     Prior to issuance, there will have been no market for the Bonds of any
Series, and there can be no assurance that a secondary market for any Bonds will
develop or, if it does develop, that it will provide Bondholders with a
sufficient level of liquidity of investment or will continue while Bonds of such
Series remain outstanding. In addition, the market value of Bonds of any Series
may fluctuate with changes in prevailing rates of interest and prepayments,
spreads and other factors. Consequently, the sale of Bonds by a Bondholder in
any secondary market that may develop may be at a discount from their purchase
price. Issuance of the Bonds of a Series in book-entry form may also reduce the
liquidity of such Bonds since investors may be unwilling to purchase Bonds for
which they cannot obtain physical certificates. See "-- Effects of Book-Entry
Registration" herein. No Issuer is expected to apply to have the Bonds issued by
it listed on any exchange.
 
BANKRUPTCY AND INSOLVENCY RISKS
 
     EFFECTS OF BANKRUPTCY OF REDWOOD TRUST OR DEPOSITOR.  Redwood Trust and the
Depositor will treat the transfer of the Mortgage Collateral by Redwood Trust to
the Depositor as a sale for accounting purposes. The Depositor and each Issuer
will treat the transfer of Mortgage Collateral from the Depositor to such Issuer
as a sale for accounting purposes. As a sale of the Mortgage Collateral by
Redwood Trust to the Depositor, the Mortgage Collateral would not be part of
Redwood Trust's bankruptcy estate and would not be available to Redwood Trust's
creditors. However, in the event of the insolvency of Redwood Trust, it is
possible that the bankruptcy trustee or a creditor of Redwood Trust may attempt
to recharacterize the sale of the Mortgage Collateral as a borrowing by Redwood
Trust, secured by a pledge of the Mortgage Collateral. Similarly, as a sale of
the Mortgage Collateral by the Depositor to an Issuer, the Mortgage Collateral
would not be part of the Depositor's bankruptcy estate and would not be
available to the Depositor's creditors. However, in the event of the insolvency
of the Depositor, it is possible that the bankruptcy trustee or a creditor of
the Depositor may attempt to recharacterize the sale of the Mortgage Collateral
as a borrowing by the Depositor, secured by a pledge of the Mortgage Collateral.
In either case, in the event the transfer is recharacterized as a pledge, unless
otherwise provided in the related Prospectus Supplement, the Depositor or the
Issuer, as the case may be, will have a perfected security interest in the
related Mortgage Collateral. Nonetheless, a court could prevent timely payments
of amounts due on the Bonds and result in a reduction of payments due on the
Bonds.
 
     EFFECTS OF BANKRUPTCY OF THE MASTER SERVICER.  In the event of a bankruptcy
or insolvency of the Master Servicer, the bankruptcy trustee or receiver may
have the power to prevent the Bond Trustee or the Bondholders from appointing a
successor Master Servicer. The time period during which cash collections may be
commingled with the Master Servicer's own funds prior to each Distribution Date
will be specified in the related Prospectus Supplement. In the event of the
insolvency of the Master Servicer and if such cash collections are commingled
with the Master Servicer's own funds for at least ten days, the Bond Trustee
will likely not have a perfected interest in such collections since such
collections would not have been deposited in a segregated account within ten
days after the collection thereof, and the inclusion thereof in the bankruptcy
estate of the Master Servicer may result in delays in payment and failure to pay
amounts due on the Bonds of the related Series.
 
     EFFECTS OF BANKRUPTCY OF OBLIGORS ON THE MORTGAGE COLLATERAL.  In addition,
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 the secured mortgage lender to realize upon its security. For
example, in a proceeding under the federal Bankruptcy Code, a lender may not
foreclose on a mortgaged property without the permission of the bankruptcy
court. The rehabilitation plan proposed by the debtor may reduce the secured
 
                                       21
<PAGE>   82
 
indebtedness to the value of the mortgaged property as of the date of the
commencement of the bankruptcy, rendering the lender a general unsecured
creditor for the difference, and also may reduce the monthly payments due under
such mortgage loan, change the rate of interest and alter the mortgage loan
repayment schedule. The effect of any such proceedings under the federal
Bankruptcy Code, including but not limited to any automatic stay, could result
in delays in receiving payments on the Mortgage Collateral securing a Series of
Bonds and possible reductions in the aggregate amount of such payments.
 
EFFECTS OF BOOK-ENTRY REGISTRATION
 
     LIMITED LIQUIDITY.  If the Bonds of a Series are issued in book-entry form,
such registration may reduce the liquidity of such Bonds in the secondary
trading market since investors may be unwilling to purchase Bonds for which they
cannot obtain physical certificates. Since transactions in book-entry Bonds can
be effected only through the Depository Trust Company ("DTC") in the United
States, CEDEL or Euroclear in Europe, participating organizations and Financial
Intermediaries (as defined herein), the ability of a Bondholder to pledge a
book-entry Bond to persons or entities that do not participate in the DTC, CEDEL
or Euroclear systems may be limited due to lack of a physical certificate
representing such Bonds. Bond Owners will not be recognized as Bondholders as
such term is used in the related Indenture, and Bond Owners will be permitted to
exercise the rights of Bondholders only indirectly through DTC and its
Participants.
 
     POTENTIAL DELAYS IN PAYMENTS.  In addition, Bond Owners may experience some
delay in their receipt of distributions of interest and principal on book-entry
Bonds since distributions are required to be forwarded by the Bond Trustee to
DTC and DTC will then be required to credit such distributions to the accounts
of depository participants which thereafter will be required to credit them to
the account of Bond Owners either directly or indirectly through Financial
Intermediaries. See "DESCRIPTION OF THE BONDS -- Book-Entry Bonds" herein.
 
RATINGS OF THE BONDS
 
     RATINGS NOT A RECOMMENDATION.  It will be a condition to the issuance of a
Class of Bonds offered hereby that they be rated in one of the four highest
rating categories by each Rating Agency identified as rating such Class in the
related Prospectus Supplement. Any such rating would be based on, among other
things, the adequacy of the value of the related Mortgage Collateral and any
credit enhancement with respect to such Class and will represent such Rating
Agency's assessment solely of the likelihood that holders of such Class of Bonds
will receive payments to which such Bondholders are entitled under the
Indenture. Such rating will not constitute an assessment of the likelihood that
principal prepayments on mortgages underlying the related Mortgage Collateral
will be made, the degree to which the rate of such prepayments might differ from
that originally anticipated or the likelihood of early optional termination of
the Series of Bonds. Such rating shall not be deemed a recommendation to
purchase, hold or sell Bonds, inasmuch as it does not address market price or
suitability for a particular investor. Such rating will not address the
possibility that prepayment at higher or lower rates than anticipated by an
investor may cause such investor to experience a lower than anticipated yield or
that an investor purchasing a Bond at a significant premium might fail to recoup
its initial investment under certain prepayment scenarios.
 
     RATINGS MAY BE LOWERED OR WITHDRAWN.  There is also no assurance that any
such rating will remain in effect for any given period of time or may not be
lowered or withdrawn entirely by the applicable Rating Agency in the future if
in its judgment circumstances so warrant. In addition to being lowered or
withdrawn due to any erosion in the adequacy of the value of the assets of the
Issuer or any credit enhancement with respect to a Series of Bonds, such rating
might also be lowered or withdrawn because of, among other reasons, an adverse
change in the financial or other condition of a credit enhancement provider or a
change in the rating of such credit enhancement provider's long term debt.
 
     LIMITATIONS OF ANALYSIS PERFORMED BY RATING AGENCIES.  The amount, type and
nature of credit enhancement, if any, established with respect to a Class of
Bonds of a Series will be determined on the basis of criteria established by
each Rating Agency. Such criteria are sometimes based upon an actuarial analysis
of the behavior of similar loans in a larger group. Such analysis is often the
basis upon which each Rating Agency
 
                                       22
<PAGE>   83
 
determines the amount of credit enhancement required with respect to each such
Class. There can be no assurance that the historical data supporting any such
actuarial analysis will accurately reflect future experience nor any assurance
that the data derived from a large pool of similar loans accurately predicts the
delinquency, foreclosure or loss experience of any particular pool of mortgages
underlying the Mortgage Collateral. No assurance can be given that the values of
any Mortgaged Properties have remained or will remain at their levels on the
respective dates of origination of the related mortgages. If the residential
real estate markets should experience an overall decline in values such that the
outstanding principal balances of the mortgages underlying the Mortgage
Collateral securing a particular Series of Bonds and any secondary financing on
the related Mortgaged Properties become equal to or greater than the value of
the Mortgaged Properties, the rates of delinquencies, foreclosures and losses
could be higher than those now generally experienced in the mortgage lending
industry. In addition, adverse economic conditions (which may or may not affect
real property values) may affect the timely payment by mortgagors of scheduled
payments of principal and interest on the Mortgage Collateral and, accordingly,
the rates of delinquencies, foreclosures and losses with respect to any Mortgage
Collateral securing a Series of Bonds. To the extent that such losses are not
covered by credit enhancement, such losses will be borne, at least in part by
the holders of one or more Classes of Bonds of the related Series.
 
CREDIT CONSIDERATIONS AND RISKS
 
     LIMITED SOURCE OF PAYMENTS.  The Company does not have, nor is it expected
to have, any significant assets. Although the Bonds will be obligations of their
respective Issuers, no Issuer is expected to have significant assets other than
those pledged to secure separately the Series of Bonds issued by it. Unless
otherwise provided in the related Prospectus Supplement, the Bonds of a Series
will be payable solely from the assets pledged to secure such Series and will
not have any claim against or security interest in the assets pledged to secure
any other Series. There will be no recourse to the Company or Redwood Trust, or
any other person for any failure to make payments on the Bonds. In addition, at
the times set forth in the related Prospectus Supplement, certain Mortgage
Collateral and/or any balance remaining in the Bond Account for a Series of
Bonds immediately after making all payments due on such Bonds, after making any
other payments specified in the related Prospectus Supplement, may be promptly
released or remitted to the Company, Redwood Trust, any credit enhancement
provider or any other person entitled thereto and will no longer be available
for making payments on such Bonds. Consequently, investors in the Bonds of a
Series must rely solely upon payments of principal and interest on the Mortgage
Collateral pledged to secure such Series, the security therefor and the sources
of credit enhancement identified in the related Prospectus Supplement to provide
for payments on such Bonds.
 
     NO RECOURSE TO COMPANY OR REDWOOD TRUST.  The Bonds will not represent an
interest in or obligation of the Company or Redwood Trust or any affiliate
thereof. The only obligations, if any, of the Company with respect to the
Mortgage Collateral or the Bonds of any Series will be pursuant to certain
representations and warranties. The Company does not have, and is not expected
in the future to have, any significant assets with which to meet any obligation
to repurchase Mortgage Collateral with respect to which there has been a breach
of any representation or warranty. If, for example, the Company were required to
repurchase a Pledged Mortgage, its only sources of funds to make such repurchase
would be from funds obtained (i) from the enforcement of a corresponding
obligation, if any, on the part of Redwood Trust or other Seller or (ii) to the
extent provided in the related Prospectus Supplement, from a Reserve Fund or
similar credit enhancement established to provide funds for such repurchases.
 
     The only obligations of Redwood Trust or other Seller with respect to the
Mortgage Collateral or the Bonds of any Series will be pursuant to certain
representations and warranties. Redwood Trust or such other Seller may be
required to repurchase or substitute for any Pledged Mortgage with respect to
which such representations and warranties are breached. There is no assurance,
however, that Redwood Trust or such other Seller will have the financial ability
to effect any such repurchase or substitution.
 
     LIMITATIONS OF DIRECT OR INDIRECT BACKING FOR BONDS.  Only Agency
Certificates are guaranteed by any agency or instrumentality of the United
States and only the guarantee by GNMA of GNMA Certificates is entitled to the
full faith and credit of the United States. The guarantees by FNMA and FHLMC of
FNMA
 
                                       23
<PAGE>   84
 
Certificates and FHLMC Certificates, respectively, are backed only by the credit
of FNMA, a federally chartered, privately owned corporation or by the credit of
FHLMC, a federally chartered corporation controlled by the Federal Home Loan
Banks. Neither the United States nor any agency thereof will be obligated to
finance the operations of FNMA or FHLMC or to assist either FNMA or FHLMC in any
other way. See "SECURITY FOR THE BONDS -- Agency Securities" herein. Although
payment of principal of, and interest on, any Agency Certificate securing all or
part of a Series of Bonds will be guaranteed by either GNMA, FNMA or FHLMC, such
guarantee will run only to such Agency Certificate and will not guarantee the
payment of principal or interest on the Bonds of such Series. The Prospectus
Supplement for a Series of Bonds which is secured in whole or in part by
Mortgage Collateral other than Agency Certificates may describe certain
arrangements through which such Bonds, such Private Mortgage-Backed Certificates
and/or the mortgage loans underlying such Private Mortgage-Backed Certificates
are insured, guaranteed or otherwise backed. Any such backing may be subject to
contingencies described in the applicable Prospectus Supplement and will be
limited to the credit and assets of the particular specified insurer or
guarantor and will not be entitled to the full faith and credit of the United
States or to any agency or instrumentality thereof.
 
     DEFICIENCY ON SALE OF MORTGAGE COLLATERAL.  In the event of an acceleration
of the payment of the Bonds of a Series, upon an Event of Default (as defined
herein) under the Indenture with respect to such Series, there is no assurance
that the proceeds from any sale of the Mortgage Collateral would be sufficient
to pay in full the outstanding principal amount of such Series of Bonds together
with interest accrued thereon. The market value of such Mortgage Collateral
generally will fluctuate with changes in prevailing rates of interest.
Consequently, such Mortgage Collateral may be liquidated at a discount, in which
case the proceeds of liquidation might be less than the aggregate outstanding
principal amount and interest payable on the Bonds of such Series. Although the
Bonds will be obligations of their respective Issuers, no Issuer is expected to
have significant assets other than those pledged to secure separately the Series
of Bonds issued by it. It is therefore unlikely that the Issuer will have
sufficient other assets available for payment of any such deficiency. If,
following an Event of Default, a Series of Bonds has been declared to be due and
payable, the Bond Trustee may, in its discretion, but subject to the direction
of the Bondholders, refrain from selling the collateral for such Series of Bonds
and continue to apply amounts received on the collateral to payments due on the
Bonds of such Series in accordance with their terms, notwithstanding the
acceleration of the maturity of such Bonds. See "THE INDENTURE -- Rights Upon
Events of Default" herein.
 
     EFFECT OF SUBORDINATION.  If so specified in the related Prospectus
Supplement, the rights of the holders of one or more Classes of Subordinated
Bonds will be subordinate to the rights of one or more Classes of Senior Bonds
of such Series to payments of principal and/or interest (or any combination
thereof) to the extent specified in the related Prospectus Supplement. Although
subordination is intended to reduce the risk to holders of Senior Bonds of
delinquent payments or ultimate losses, the amount of subordination will be
limited. In addition, if principal payments on one or more Classes of Bonds of a
Series are made in a specified order of priority, any limits with respect to the
aggregate amount of claims under any related credit enhancement may be exhausted
before the principal of the lower priority Classes of Bonds of such Series has
been repaid. As a result, the impact of significant losses on the Mortgage
Collateral may be borne first by any Class of Subordinated Bonds of a Series and
thereafter by the Classes of Senior Bonds of such Series, in each case to the
extent described in the related Prospectus Supplement.
 
     LIMITATIONS, REDUCTION AND SUBSTITUTION OF CREDIT ENHANCEMENT.  The
Prospectus Supplement for a Series of Bonds will describe any credit enhancement
for such Series, which may include cash accounts, insurance policies, surety
bonds, guaranteed investment contracts, cross-collateralization,
overcollateralization, excess spread, reinvestment income, guarantees, letters
of credit or derivative arrangements to the extent described herein and therein.
Although credit enhancement is intended to reduce the risk of delinquent
payments or losses to holders of Bonds entitled to the benefit thereof, the
amount of such credit enhancement will be limited, as set forth in the related
Prospectus Supplement, and may be subject to periodic reduction in accordance
with a schedule or formula or otherwise decline, and could be depleted under
certain circumstances prior to the payment in full of the related Series of
Bonds, and as a result Bondholders of the related Series may suffer losses.
Moreover, such credit enhancement may not cover all potential losses or risks.
For example, credit enhancement may or may not cover fraud or negligence by a
loan originator or other parties.
 
                                       24
<PAGE>   85
 
In addition, the Trustee will generally be permitted to reduce, terminate or
substitute all or a portion of the credit enhancement for any Series of Bonds,
provided each applicable Rating Agency indicates that the then-current rating of
the Bonds of such Series will not be adversely affected. See "CREDIT
ENHANCEMENT" herein.
 
     The amount of applicable credit enhancement supporting one or more Classes
of Bonds of a Series, including the subordination of one or more Classes of
Bonds, will be determined on the basis of criteria established by each Rating
Agency rating such Classes of Bonds based on, among other things, assumptions
regarding levels of defaults, delinquencies and losses. There can be no
assurance that the default, delinquency and loss experience on the related
Mortgage Collateral will not exceed such assumed levels. See "-- Ratings of the
Bonds" herein.
 
     DELINQUENT LOANS MAY ADVERSELY AFFECT INVESTMENT.  Certain of the Pledged
Mortgages or mortgage loans underlying the Certificates securing a Series of
Bonds may be past due or non-performing as of the related Cut-off Date.
Investors should consider the risk that the inclusion of such loans in the
Mortgage Collateral for a Series of Bonds may affect the rate of defaults and
prepayments on such Mortgage Collateral and the yield on the Bonds of such
Series.
 
PRE-FUNDING ACCOUNTS MAY RESULT IN REINVESTMENT RISK
 
     If so specified in the related Prospectus Supplement, on the related
Closing Date the Depositor will deposit cash in an amount (the "Pre-Funded
Amount") specified in such Prospectus Supplement into an account (the
"Pre-Funding Account"). The Pre-Funded Amount will be used to purchase
additional Pledged Mortgages and/or Certificates ("Subsequent Mortgage
Collateral") during a period from the related Closing Date to a date not more
than one year after such Closing Date (such period, the "Funding Period") from
the Depositor (which, in turn, will acquire such Subsequent Mortgage Collateral
from Redwood Trust). The Pre-Funding Account will be maintained with the Bond
Trustee for the related Series of Bonds and is designed solely to hold funds to
be applied by such Bond Trustee during the Funding Period to pay to the
Depositor the purchase price for Subsequent Mortgage Collateral. Monies on
deposit in the Pre-Funding Account will not be available to cover losses on or
in respect of the related Mortgage Collateral. To the extent that the entire
Pre-Funded Amount has not been applied to the purchase of Subsequent Mortgage
Collateral by the end of the related Funding Period, any amounts remaining in
the Pre-Funding Account will be distributed as a prepayment of principal to
Bondholders on the Distribution Date immediately following the end of the
Funding Period in the amounts and pursuant to the priorities set forth in the
related Prospectus Supplement. Any reinvestment risk resulting from such
prepayment will be borne entirely by the holders of one or more Classes of the
related Series of Bonds. See "SECURITY FOR THE BONDS -- Pre-Funding Account"
herein.
 
PRE-FUNDING ACCOUNTS MAY ADVERSELY AFFECT INVESTMENT
 
     The ability of the Issuer to acquire Subsequent Mortgage Collateral during
the Funding Period will be dependent upon the ability of the Depositor to
acquire Subsequent Mortgage Collateral that satisfies the requirements described
in the related Prospectus Supplement. Although such Subsequent Mortgage
Collateral must satisfy the characteristics described in the related Prospectus
Supplement, such Subsequent Mortgage Collateral may have certain different
characteristics, including, without limitation, a more recent origination date
than the initial Mortgage Collateral. As a result, the addition of such
Subsequent Mortgage Collateral pursuant to the Pre-Funding Account may adversely
affect the performance of the related Bonds. See "SECURITY FOR THE
BONDS -- Pre-Funding Account" herein.
 
CONSEQUENCES OF OWNING ORIGINAL ISSUE DISCOUNT BONDS
 
     All of the Deferred Interest Bonds will be, and certain of the other Bonds
may be, issued with original issue discount for federal income tax purposes. A
holder of a Bond issued with original issue discount will be required to include
original issue discount in ordinary gross income for federal income tax purposes
as it accrues, in advance of receipt of the cash attributable to such income.
Accrued but unpaid interest on the
 
                                       25
<PAGE>   86
 
Deferred Interest Bonds generally will be treated as original issue discount for
this purpose. See "FEDERAL INCOME TAX CONSEQUENCES -- Interest and Original
Issue Discount" and "-- Market Discount" herein.
 
CONSOLIDATED TAX RETURN
 
     Whether or not the Bonds are treated as debt for federal income tax
purposes, so long as such Bonds are not deemed to have two or more maturities,
the Issuer will be treated as a branch of Redwood Trust or a partnership for
federal income tax purposes. However, if the Issuer is deemed to have issued
debt with two or more maturities, it will be treated as a taxable mortgage pool
that is a "qualified REIT subsidiary" of Redwood Trust. If such an Issuer were
to fail to be treated for federal income tax purposes as a "qualified REIT
subsidiary" by reason of Redwood Trust's failure to continue to qualify as a
real estate investment trust ("REIT") for federal income tax purposes or for any
other reason, the net income of the Issuer would be subject to corporate income
tax and the Issuer would not be permitted to be included on a consolidated
income tax return of another corporate entity. No assurance can be given with
regard to the prospective qualification of an Issuer as a qualified REIT
subsidiary or of Redwood Trust as a REIT for federal income tax purposes. See
"FEDERAL INCOME TAX CONSEQUENCES" herein.
 
                                  INTRODUCTION
 
     Sequoia Mortgage Funding Corporation, a Delaware corporation (the
"Company"), proposes to establish one or more trusts to issue and sell Bonds
from time to time under this Prospectus and related Prospectus Supplements. The
Company is a limited purpose finance corporation whose capital stock is wholly
owned by Redwood Trust, Inc. ("Redwood Trust"). Redwood Trust, a Maryland
corporation, has elected to be treated as a real estate investment trust under
the Internal Revenue Code of 1986, as amended (the "Code"). The Company was
formed for the sole purpose of acting as the depositor of one or more trusts to
be formed for the purpose of issuing the Bonds offered hereby and by the related
Prospectus Supplements. Each trust that is formed to act as an Issuer will be
created pursuant to an agreement between the Company acting as depositor (in
such capacity, the "Depositor"), and a bank, trust company or other fiduciary,
acting as owner trustee (the "Owner Trustee"). Each trust will be established
solely for the purpose of issuing one Series of Bonds and engaging in
transactions relating thereto. Each Series of Bonds will be separately secured
by the collateral described in the Prospectus Supplement relating to such
Series, which collateral will constitute the only significant assets available
to make payments on the Bonds of such Series. Accordingly, the investment
characteristics of a Series of Bonds will be determined by the collateral
pledged to secure such Series and will not be affected by the identity of the
obligor with respect to such Series of Bonds. The term "Issuer," as used herein,
with respect to a Series of Bonds refers to the trust established by the Company
for the sole purpose of issuing such Series of Bonds.
 
     Each Series of Bonds will be issued pursuant to a separate Indenture (the
"Indenture") between the Issuer of such Series and a bank or trust company
acting as trustee for the holders of such Bonds (the "Bond Trustee"). A form of
the Indenture has been filed as an exhibit to the Registration Statement of
which this Prospectus forms a part. The Indenture relating to each Series of
Bonds will be filed with the Securities and Exchange Commission as soon as
practicable following the issuance of such Series of Bonds.
 
                                   THE ISSUER
 
GENERAL
 
     Any trust established to act as Issuer of a Series of Bonds will be created
pursuant to a deposit trust agreement between the Company and a bank, trust
company or other fiduciary acting as Owner Trustee. Under the terms of each
deposit trust agreement, the Company initially will retain the entire beneficial
interest in the trust created thereunder unless otherwise specified in the
related Prospectus Supplement. The Company may thereafter sell or assign all or
a portion of such beneficial ownership to another entity or entities unless
prohibited from doing so by the related deposit trust agreement. The beneficial
owners of each Issuer will have no liability for the obligations of the Issuer
under the Bonds issued by it. Unless otherwise specified in the related
Prospectus Supplement, each Issuer will be managed by Redwood Trust.
 
                                       26
<PAGE>   87
 
     The Mortgage Collateral for each Series of Bonds will have been deposited
with the Issuer of such Series by the Company which, in turn, will have either
(i) received such collateral from Redwood Trust (or an affiliate) as a
contribution to the Company's capital or (ii) acquired such collateral from
Redwood Trust (or an affiliate) or another entity or entities (in such capacity,
each a "Seller"), as provided in the related Prospectus Supplement, in exchange
for the net proceeds from the issuance of such Series plus the beneficial
interest in the Issuer issuing such Series. (References herein to Redwood Trust
in its capacity as Seller shall be deemed to include any affiliate of Redwood
Trust acting in such capacity.) Redwood Trust acquires mortgage loans in the
normal course of its business from persons who have originated or otherwise
acquired such loans.
 
     Upon the issuance of each Series of Bonds, the related Mortgage Collateral
will be deposited by the Company with the Issuer of such Series and pledged by
such Issuer to the Bond Trustee under the related Indenture to secure such
Series of Bonds. The Indenture with respect to each Series of Bonds will
prohibit the incurrence of further indebtedness by the Issuer of such Series of
Bonds. The Bond Trustee will hold the Mortgage Collateral for a Series of Bonds
as security pledged only for that Series, and holders of the Bonds of that
Series will be entitled to the equal and proportionate benefits of such
security.
 
     Each deposit trust agreement will provide that the related trust may not
conduct any activities other than those related to the issuance and sale of the
Bonds of the particular Series issued by it and such other limited activities as
may be required in connection with reports and distributions to holders of
beneficial interests in the trust. No deposit trust agreement will be subject to
amendment without the prior written consent of the Bond Trustee for the related
Series, which consent may not be unreasonably withheld if such amendment would
not adversely affect the interests of the Bondholders of such Series. The
holders of the beneficial interest in each Issuer will not be liable for payment
of principal and interest on the Bonds, and holders of Bonds of each Series will
be deemed to have released the holders of beneficial interest from any claim,
liability or obligation on or with respect to the Bonds of such Series.
 
THE COMPANY
 
     The Company was incorporated in the State of Delaware on January 31, 1997
and is a limited purpose finance subsidiary of Redwood Trust. The Company is a
qualified real estate investment trust subsidiary. Redwood Trust is a publicly
owned real estate investment trust. The Company's principal executive offices
are located at 591 Redwood Highway, Suite 3125, Mill Valley, California 94941.
The Company's telephone number is 415-381-1765.
 
     Redwood Trust has agreed with the Company that Redwood Trust will not file
or cause to be filed any voluntary petition in bankruptcy against the Company or
any trust created by it until at least one year after the date on which the
Bonds have been paid in full, if at all.
 
                                USE OF PROCEEDS
 
     The net proceeds to be received from the sale of the Bonds of each Series
will be applied by the Company to the purchase or acquisition of the related
Mortgage Collateral or the payment of expenses incurred in connection with the
issuance of Bonds and otherwise incurred in connection with the conduct of the
Company's operations. The Mortgage Collateral pledged to secure a Series of
Bonds will either be contributed to the Company's capital by Redwood Trust (or
an affiliate) or acquired by the Company from Redwood Trust (or an affiliate) or
another Seller and deposited with the Issuer of such Series by the Company.
 
                             MORTGAGE LOAN PROGRAM
 
     The Pledged Mortgages will have been purchased by the Depositor, either
directly or through affiliates, from Sellers. The Pledged Mortgages so acquired
by the Depositor will have been originated substantially in accordance with the
underwriting criteria specified below under "Underwriting Standards."
 
                                       27
<PAGE>   88
 
UNDERWRITING STANDARDS
 
     Unless otherwise specified in the related Prospectus Supplement, each
Seller will represent and warrant that all Pledged Mortgages originated and/or
sold by it to the Depositor or one of its affiliates will have been underwritten
in accordance with standards consistent with those utilized by mortgage lenders
generally during the period of origination. The related Prospectus Supplement
will include detailed information with respect to the underwriting standards
employed by the applicable originators of the Pledged Mortgages, to the extent
such information is reasonably available to the Depositor. Such information may
include, as applicable, underwriting guidelines with respect to required
borrower income, debt to income ratios, credit histories, loan-to-value ratios
and documentation and verification requirements.
 
     Underwriting standards are applied by or on behalf of a lender to evaluate
the borrower's credit standing and repayment ability, and the value and adequacy
of the related Mortgaged Property as collateral. In general, a prospective
borrower applying for a loan is required to fill out a detailed application
designed to provide to the underwriting officer pertinent credit information. As
part of the description of the borrower's financial conditions, the borrower
generally is required to provide a current list of assets and liabilities and a
statement of income and expenses, as well as an authorization to apply for a
credit report which summarizes the borrower's credit history with local
merchants and lenders and any record of bankruptcy. In most cases, an employment
verification is obtained from an independent source (typically the borrower's
employer) which verification reports, among other things, the length of
employment with that organization, the current salary, and whether it is
expected that the borrower will continue such employment in the future. If a
prospective borrower is self-employed, the borrower may be required to submit
copies of signed tax returns. The borrower may also be required to authorize
verification of deposits at financial institutions where the borrower has demand
or savings accounts.
 
     In determining the adequacy of the Mortgaged Property as collateral, an
appraisal is made of each property considered for financing. The appraiser is
required to inspect the property and verify that it is in good condition and
that construction, if new, has been completed. The appraisal is based on the
market value of comparable homes, the estimated rental income (if considered
applicable by the appraiser) and the cost of replacing the home. The value of
the property being financed, as indicated by the appraisal, must be such that it
currently supports, and is anticipated to support in the future, the outstanding
loan balance. The maximum Loan-to-Value Ratio is generally not expected to
exceed 95%. Most loans with Loan-to-Value Ratios in excess of 80% at origination
must be covered by private mortgage insurance insuring the balance thereof down
to a 75% Loan-to-Value Ratio. The method of calculating the "Loan-to-Value
Ratio" of a Pledged Mortgage will be described in the Prospectus Supplement for
a Series of Bonds secured by Pledged Mortgages.
 
     Once all applicable employment, credit and property information is
received, a determination generally is made as to whether the prospective
borrower has sufficient monthly income available (i) to meet the borrower's
monthly obligations on the proposed mortgage loan (determined on the basis of
the monthly payments due in the year of origination) and other expenses related
to the Mortgaged Property (such as property taxes and hazard insurance) and (ii)
to meet monthly housing expenses and other financial obligations and monthly
living expenses. The maximum housing expense to income ratio referred to in (i)
is generally not expected to exceed 40% and the maximum debt to income ratio
described in (ii) is generally not expected to exceed 55%. The underwriting
standards applied by Sellers may be varied in appropriate cases where factors
such as low Loan-to-Value Ratios or other favorable credit issues exist.
 
     The Depositor expects that a substantial portion of the Pledged Mortgages
it purchases will be "jumbo" loans, i.e., loans that exceed the maximum balance
for purchase by FNMA or FHLMC. Under current regulations, the maximum principal
balance allowed on loans eligible for purchase by FNMA or FHLMC ranges from
$214,600 ($321,900 for mortgage loans secured by mortgaged properties located in
either Alaska or Hawaii) for one-unit to $412,450 ($618,675 for mortgage loans
secured by mortgaged properties located in either Alaska or Hawaii) for
four-unit residential loans. The maximum loan amount is generally not expected
to exceed $1,500,000 in the case of any of the foregoing types of loans.
 
     A lender may originate mortgage loans under a reduced documentation
program. A reduced documentation program is designed to facilitate the loan
approval process and thereby improve the lender's competitive
 
                                       28
<PAGE>   89
 
position among other loan originators. Under a reduced documentation program,
relatively more emphasis is placed on property underwriting than on credit
underwriting and certain underwriting documentation concerning income and
employment verification is waived.
 
     In the case of a loan secured by a leasehold interest in a real property,
the title to which is held by a third party lessor, generally, the Seller will
be required to represent and warrant, among other things, that the remaining
term of the lease and any sublease is at least five years longer than the
remaining term of the mortgage loan.
 
     Certain of the types of loans which may be included in the Mortgage
Collateral are recently developed and may involve additional uncertainties not
present in traditional types of loans. For example, certain of such Pledged
Mortgages may provide for escalating or variable payments by the mortgagor or
obligor. These types of Pledged Mortgages are underwritten on the basis of a
judgment that mortgagors or obligors will have the ability to make monthly
payments required initially. In some instances, however, a mortgagor's or
obligor's income may not be sufficient to permit continued loan payments as such
payments increase. These types of loans may also be underwritten primarily upon
the basis of Loan-to-Value Ratios or other favorable credit factors.
 
QUALITY CONTROL
 
     The Depositor's parent, Redwood Trust, has developed a quality control
program to monitor the quality of loan underwriting at the time of acquisition
and on an ongoing basis. All loans purchased by the Depositor will be subject to
this quality control program. A legal document review of each loan acquired will
be conducted to verify the accuracy and completeness of the information
contained in the mortgage notes, security instruments and other pertinent
documents in the file. A sample of loans to be acquired, selected by focusing on
those loans with higher risk characteristics, will normally be submitted to a
third party nationally recognized underwriting review firm for a compliance
check of underwriting and review of income, asset and appraisal information.
 
REPRESENTATIONS BY SELLERS; REPURCHASES
 
     Each Seller will have made representations and warranties in respect of the
mortgage loans sold by such Seller and included in the Pledged Mortgages
securing a Series of Bonds. Such representations and warranties generally
include, among other things: (i) that title insurance (or in the case of
Mortgaged Properties located in areas where such policies are generally not
available, an attorney's certificate of title) and any required hazard insurance
policy and Primary Mortgage Insurance Policy (as defined herein) were effective
at the origination of each mortgage loan other than Cooperative Loans, and that
each policy (or certificate of title as applicable) remained in effect on the
date of purchase of the mortgage loan from the Seller by or on behalf of the
Company; (ii) that the Seller had good title to each such mortgage loan and such
mortgage loan was subject to no offsets, defenses, counterclaims or rights of
rescission except to the extent that any buydown agreement described herein may
forgive certain indebtedness of the obligors on such Pledged Mortgages (each, a
"Mortgagor"); (iii) that each mortgage loan constituted a valid first or junior
lien, as the case may be, on the Mortgaged Property (subject only to permissible
title insurance exceptions, if applicable, and certain other exceptions
described in the Master Servicing Agreement) and that the Mortgaged Property was
free from damage and was in good repair; (iv) that there were no delinquent tax
or assessment liens against the Mortgaged Property; (v) that no required payment
on a mortgage loan was 60 or more days delinquent at any time during the twelve
months prior to the date it is pledged to secure the related Series of Bonds;
and (vi) that each mortgage loan was made in compliance with, and is enforceable
under, all applicable local, state and federal laws and regulations in all
material respects.
 
     If the Seller cannot cure a breach of any representation or warranty made
by it in respect of a Pledged Mortgage that materially and adversely affects the
interests of the Bondholders in such Pledged Mortgage within 90 days after
notice of such breach, then such Seller will be obligated to either (i)
substitute a similar mortgage loan for such Pledged Mortgage under the
conditions specified in the related Prospectus Supplement or (ii) repurchase
such Pledged Mortgage from the Issuer at a price (the "Purchase Price") equal to
100% of
 
                                       29
<PAGE>   90
 
the outstanding principal balance thereof as of the date of the repurchase plus
accrued interest thereon to the first day of the month following the month in
which such Pledged Mortgage is repurchased at the Mortgage Rate (less any
unreimbursed advances or amount payable as related master servicing compensation
if the Seller is the Master Servicer with respect to such Pledged Mortgage). The
Master Servicer will be required under the applicable Master Servicing Agreement
and Indenture to enforce this obligation for the benefit of the Bond Trustee and
the Bondholders, following the practices it would employ in its good faith
business judgment were it the owner of such Pledged Mortgage. These substitution
or repurchase obligations will constitute the sole remedies available to
Bondholders or the Bond Trustee for a breach of representation by a Seller.
 
                            DESCRIPTION OF THE BONDS
 
GENERAL
 
     Each Series of Bonds offered hereby and by the related Prospectus
Supplement will be issued pursuant to a separate Indenture between the Issuer of
such Series and the Bond Trustee for such Series. The following summaries
describe certain provisions common to each Series of Bonds. The summaries are
subject to, and are qualified in their entirety by reference to, the Prospectus
Supplement and the provisions of the Indenture relating to each Series of Bonds.
Summaries of particular provisions or terms used in the Indenture incorporate by
reference the actual provisions (including definitions of terms) as part of such
summaries, and are qualified in their entirety by reference to the actual
provisions of the Indenture.
 
     The Bonds are issuable in Series. Each Series may include one or more
Classes of Bonds ("Deferred Interest Bonds") upon which interest will accrue but
will not be payable, except in certain circumstances upon the optional
redemption thereof or as otherwise provided in the related Prospectus
Supplement. Prior to such time, the amount of interest so accrued will be added
to the principal of such Class of Deferred Interest Bonds on each Payment Date.
(Indenture, Section 2.03) A Series of Bonds may include one or more Classes that
are senior in right of payment to one or more other Classes of Bonds of such
Series. A Series of Bonds may also include one or more Classes of zero coupon
bonds. The Bonds of each Series will be issued in either fully registered or
book-entry form in the authorized denominations specified in the related
Prospectus Supplement. (Indenture, Section 2.04) The transfer of the Bonds will
be registered and the Bonds may be exchanged without the payment of any service
charge other than any tax or governmental charge payable in connection with such
registration of transfer or exchange. (Indenture, Section 2.07)
 
     Payments of principal of, and interest on, each Series of Bonds will be
made on the Payment Dates set forth in the Prospectus Supplement relating to
such Series by check mailed to Bondholders of such Series registered as such on
the related Record Date preceding such Payment Date at their addresses appearing
on the Bond Register, except that final payments of principal in retirement of
each Bond will be made only upon presentation and surrender of such Bond at the
office or agency of the Issuer maintained for that purpose. (Indenture, Section
2.09(a) and (b)) Notice will be mailed before the Payment Date on which the
final principal payment on any Bond is expected to be made by the Bond Trustee
to the holder of such Bond. (Indenture, Section 2.09(b)) Payments in respect of
interest and principal on the Bonds will be made by the Bond Trustee, or such
other bank, trust company or other fiduciary identified in the related
Prospectus Supplement, as the paying agent of the Issuer. (Indenture, Section
3.03)
 
     The Bond Trustee will include with each payment on a Bond which includes
principal and interest a statement showing the allocation of such payment to
principal and interest and the remaining unpaid principal amount of such Bond.
Payments on Bonds which include only interest will be accompanied by a statement
showing the aggregate unpaid principal amount of the Bonds of each Class of the
same Series. On each Payment Date before payments of principal are first made on
a particular Class of Deferred Interest Bonds of a Series, the Bond Trustee for
such Series will furnish to each holder of a Bond of such Class a statement
showing the aggregate unpaid principal amount of such Class of Bonds and the new
principal balance of such holder's Deferred Interest Bond.
 
                                       30
<PAGE>   91
 
PAYMENTS OF INTEREST
 
     The Bonds of each Class will bear interest on their unpaid principal
amounts from the date and at the rates per annum specified or determined in the
manner set forth in the related Prospectus Supplement (calculated on the basis
of a 360-day year of twelve 30-day months unless otherwise specified in the
related Prospectus Supplement) until the principal amount of the Bonds of such
Class is paid in full. Interest on a Series of Bonds or on a Class of Bonds
within a Series may accrue at a fixed rate, a variable rate or a combination
thereof, as determined or reset in the manner specified in the related
Prospectus Supplement. Interest on the Bonds other than Deferred Interest Bonds
will be due and payable on the Payment Dates specified in the related Prospectus
Supplement. Payments of interest on each Class of Deferred Interest Bonds will
commence as specified in the related Prospectus Supplement. Prior to such time,
interest on such Class of Deferred Interest Bonds will accrue and the amount of
interest so accrued will be added to the principal thereof on each Payment Date.
Such Class of Deferred Interest Bonds will thereafter accrue interest on the
outstanding principal amount thereof as so adjusted. Each such payment or
accrual of interest will include all interest accrued either to, but not
including, the related Payment Date or through a date prior to such Payment Date
as specified in the related Prospectus Supplement. In the latter case, the
effective yield to the Bondholders will be reduced to a level below the yield
that would apply if interest were accrued to, but not including, the respective
Payment Date.
 
     A Series of Bonds or one or more Classes of Bonds within a Series may bear
interest at a variable rate (the "Floating Rate Bonds") which may have an
interest rate cap or an interest rate floor, or both, as specified in the
related Prospectus Supplement. The interest payment dates on Floating Rate Bonds
will be set forth in the related Prospectus Supplement and may not be the same
as the interest payment dates for the other Bonds of such Series, but may be
either more or less frequent. The variable interest rate formula for any Series
or Class of Floating Rate Bonds will generally be based off a financial index
recognized in the national or international financial markets. The Prospectus
Supplement for any Series or Class within a Series of Floating Rate Bonds will
set forth the initial interest rate, the index upon which adjustments thereto
will be computed, the formula for such computation, the intervals at which such
computations will be made, the maximum and minimum interest rates, if any, and
other characteristics common to such Bonds.
 
PAYMENTS OF PRINCIPAL
 
     Principal payments on each Series of Bonds will be made on each Payment
Date in an amount equal to the sum of (a) if specified in the related Prospectus
Supplement, the amount of interest, if any, accrued but not then payable on the
Deferred Interest Bonds of such Series from the prior Payment Date or, if
specified in the related Prospectus Supplement, from a date prior to such prior
Payment Date and (b) either (i) the percentage or percentages specified in the
related Prospectus Supplement of the funds available for such purpose
("Available Funds") for such Payment Date or (ii) the sum of (x) an amount
determined by reference to the aggregate decline in the Bond Values of the
Mortgage Collateral securing such Series of Bonds in the related Due Period and
(y) the amount, if any, of the Spread specified in such Prospectus Supplement.
The Prospectus Supplement for each Series of Bonds will specify the manner in
which the Available Funds or the Bond Values, as applicable, will be determined.
The aggregate amount of principal payments required to be made on a Series of
Bonds on any Payment Date will be reduced by the principal amount of the Bonds
of such Series redeemed pursuant to any special redemption and certain optional
redemptions occurring subsequent to the preceding Payment Date. See "DESCRIPTION
OF THE BONDS -- Special Redemption" and " -- Optional Redemption" herein.
 
     The Bond Value of Mortgage Collateral securing the Bonds of a Series
represents the principal amount of Bonds of such Series that, based on certain
assumptions and irrespective of prepayments on such Mortgage Collateral, can be
supported by scheduled distributions on such Mortgage Collateral, together with
(depending on the method used to determine the Bond Value of the Mortgage
Collateral) the reinvestment earnings thereon at the rate described in the
related Prospectus Supplement (the "Assumed Reinvestment Rate") and, if
applicable, the cash available to be withdrawn from a related Reserve Fund, if
any. For convenience of calculation with respect to each Series of Bonds,
Certificates securing a Series of Bonds that are backed by a pool of mortgage
loans sharing similar payment characteristics, or Pledged Mortgages which secure
a Series of
 
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<PAGE>   92
 
Bonds and share similar payment characteristics, may be aggregated into one or
more groups (each, a "Collateral Group") each of which will be assigned an
aggregate Bond Value.
 
     If so specified in the related Prospectus Supplement, the aggregate Bond
Value of a Collateral Group consisting of Pledged Mortgages or Certificates
sharing similar payment characteristics will be calculated as if such Pledged
Mortgages or the mortgage loans underlying such Certificates constituted a
single mortgage loan having such of the payment characteristics of such Pledged
Mortgages or of the mortgage loans underlying the Certificates included in such
Collateral Group as would result in the lowest Bond Value being assigned to the
Pledged Mortgages or Certificates included in such Collateral Group. There are a
number of alternative means of determining the Bond Value of a mortgage loan or
of collateral backed by mortgage loans, including determinations based on the
discounted present value of the remaining scheduled distributions on such
mortgage loans and determinations based on the relationship of the interest rate
borne by such mortgage loans and by the related Bonds. If applicable, the
Prospectus Supplement for a Series of Bonds will specify the method or methods
used to determine the Bond Values of the Collateral Groups securing such Series
of Bonds. The aggregate of the Bond Values on any Payment Date of all such
Collateral Groups will be at least equal to the outstanding principal amount of
the Bonds of such Series.
 
     If applicable, the Assumed Reinvestment Rate for a Series of Bonds will be
described in the related Prospectus Supplement and may be any rate permitted by
each applicable Rating Agency or a rate provided under a guaranteed investment
contract, surety bond or similar arrangement satisfactory to each applicable
Rating Agency. If the Assumed Reinvestment Rate is so provided, the related
Prospectus Supplement will describe the terms of such arrangement.
 
     Unless the related Prospectus Supplement provides otherwise, the Spread, if
applicable, for each Series of Bonds as of any Payment Date will be the excess,
if any, of the sum of (i) all distributions received with respect to the
Mortgage Collateral securing such Series of Bonds in the related Due Period,
(ii) the reinvestment income thereon and (iii) amounts which are required or are
permitted to be withdrawn from a Reserve Fund, if any, less the sum of (i) all
interest payable on the Bonds of such Series on such Payment Date, (ii) the
Basic Principal Payment required to be made on such Series of Bonds on such
Payment Date and (iii) an amount reflecting the redemption price of any Bonds of
such Series redeemed during the related Due Period and the expenses accrued by
the Issuer during the related Due Period relating to the administration of such
Series of Bonds.
 
     Payments of principal will be allocated among the Classes of Bonds
comprising a Series in the manner specified in the related Prospectus Supplement
and, with respect to a particular Class of Bonds, will be applied on a pro rata
basis, unless otherwise specified in the related Prospectus Supplement. Each
Class of Bonds will be scheduled to be fully paid no later than the Stated
Maturity for such Class of Bonds specified in the related Prospectus Supplement.
If so specified in the related Prospectus Supplement, holders of one or more
Classes of Bonds of a Series may have the right, at their option, to receive
full payment in respect of such Bonds prior to Stated Maturity, in each case to
the extent and under the circumstances specified in their related Prospectus
Supplement.
 
SPECIAL REDEMPTION
 
     If so specified in the related Prospectus Supplement, the Bonds of each
Series or Class may be subject to special redemption, in whole or in part, under
the circumstances and in the manner described below or in the related Prospectus
Supplement. If applicable, the Issuer will be required to redeem, on the day of
any month specified in the related Prospectus Supplement, outstanding Bonds of a
Series in the amount described below if, as a result of substantial payments of
principal on the Pledged Mortgages or the mortgage loans underlying the
Certificates pledged as security for such Series of Bonds or low reinvestment
yields, or both, the Bond Trustee determines, based on the procedures and
assumptions specified in the Indenture, that, in the absence of such special
redemption, the amount of cash to be on deposit in the related Bond Account on
the next Payment Date for such Series of Bonds would be insufficient to make
required payments on the Bonds of such Series on such Payment Date. (Indenture,
Section 10.01) The amount of Bonds required to be so redeemed will not exceed
the distributions on the Mortgage Collateral securing such Series of Bonds
received during the
 
                                       32
<PAGE>   93
 
Due Period that would otherwise be required to be applied to the payment of
principal of such Series of Bonds on the following Payment Date.
 
     All payments of principal pursuant to any special redemption will be made
in the priority and manner specified in the related Prospectus Supplement. Bonds
of the same Class will be redeemed in the manner specified in the related
Prospectus Supplement. Notice of any such redemption must be mailed by the
Issuer or the Bond Trustee at least five days prior to the special redemption
date. (Indenture, Section 10.02) The redemption price required to be paid for
any Bond to be so redeemed will be equal to 100% of the principal amount thereof
together with accrued interest. (Indenture, Section 10.01)
 
OPTIONAL REDEMPTION
 
     If so provided in the related Prospectus Supplement, the Bonds of any Class
of a Series may be subject to redemption at the option of the Issuer. Unless
otherwise provided in the related Prospectus Supplement, notice of any such
redemption must be given by the Issuer to the Bond Trustee not less than 30 days
prior to the redemption date and must be mailed by the Issuer or the Bond
Trustee to affected Bondholders at least five days prior to the redemption date.
(Indenture, Sections 10.01 and 10.02) The Prospectus Supplement for each Series
will specify the circumstances, if any, under which the Bonds of such Series may
be so redeemed, the manner of effecting such redemption, the conditions to which
such redemption are subject and the redemption prices for each Class of Bonds to
be redeemed.
 
CALL PROTECTION AND GUARANTEES
 
     The Issuer also may, at its option, obtain for any Series of Bonds one or
more guarantees from a company or companies acceptable to each applicable Rating
Agency, which guarantees may provide for (i) call protection (which may include
yield maintenance) for any Class of Bonds of such Series or (ii) a guarantee of
a certain prepayment rate with respect to some or all of the Pledged Mortgages
or mortgage loans underlying the Certificates pledged as collateral for such
Series. Any call protection or guarantees may affect the weighted average life
of the Bonds of such Series.
 
WEIGHTED AVERAGE LIFE OF THE BONDS
 
     All of the Pledged Mortgages securing a Series of Bonds will consist of
mortgage loans which are neither insured nor guaranteed by any governmental
agency ("Conventional Loans"). See "SECURITY FOR THE BONDS -- The Pledged
Mortgages" herein. The mortgage loans underlying the Private Mortgage-Backed
Securities, FHLMC Certificates and FNMA Certificates securing a Series of Bonds
will consist of either Conventional Loans, FHA Loans (as defined herein) or VA
Loans (as defined herein), or any combination thereof. The mortgage loans
underlying the GNMA Certificates securing a Series of Bonds will consist of FHA
Loans or VA Loans. Each Pledged Mortgage and each Certificate will provide by
its terms for monthly payments (or, in the case of Private Mortgage-Backed
Securities, such other period as may be specified in the related Prospectus
Supplement) of principal and interest in the amounts described in "SECURITY FOR
THE BONDS -- The Pledged Mortgages," " -- Agency Securities," and " -- Private
Mortgage-Backed Securities" herein.
 
     Since the aggregate amount of the principal payment required to be made on
a Series of Bonds on a Payment Date will depend on the amount of the principal
payments (including for this purpose prepayments resulting from refinancing or
liquidations due to defaults, casualties, condemnations and repurchases by the
Seller, the Issuer or Redwood Trust or purchases by the Master Servicer or the
Company) received on the related Pledged Mortgages or Certificates, as the case
may be, in the related Due Period, the prepayment experience on the underlying
mortgage loans (with respect to a Series of Bonds secured by Certificates) or on
the Pledged Mortgages (with respect to a Series of Bonds secured by Pledged
Mortgages) will affect (i) the weighted average life of each Class of Bonds and
(ii) the extent to which such Class is paid prior to its Stated Maturity. The
prepayment experience on the Pledged Mortgages which secure a Series of Bonds
may be affected by recoveries on foreclosures or other liquidations of Pledged
Mortgages and by losses from defaults and delinquencies on Pledged Mortgages.
See "SERVICING OF THE PLEDGED MORTGAGES" herein.
 
                                       33
<PAGE>   94
 
The weighted average life of each outstanding Class of Bonds also may be
affected by the actual reinvestment income earned on the payments on the
Mortgage Collateral, if applicable, if a portion of the Spread is paid as a
principal payment on such Bonds and by the exercise by the Issuer of its right
to substitute other Mortgage Collateral for the Mortgage Collateral originally
pledged as security for such Bonds. Although any substitute Mortgage Collateral
will have payment terms anticipated to result in a cash flow substantially
similar to, but in no event less than, the anticipated cash flow of the Mortgage
Collateral it replaces, such substitutions may, individually or in the
aggregate, affect the weighted average life of such Bonds. See "SECURITY FOR THE
BONDS -- Substitution of Mortgage Collateral" herein. Further, the weighted
average life of each Class of a Series of Bonds secured by FNMA Certificates may
be affected by the exercise by FNMA of its right to repurchase the mortgage
loans backing such FNMA Certificates, as described under "SECURITY FOR THE
BONDS -- Agency Securities" herein. Any Private Mortgage-Backed Securities may
also be redeemed or otherwise subject to early prepayment in accordance with
their terms. The Stated Maturity for each Class of Bonds is the date determined
by the Company to fall a specified period after the date on which the principal
thereof will be fully paid, assuming (i) timely receipt of scheduled payments
(with no prepayments) on the Mortgage Collateral, (ii) if applicable, such
scheduled payments are reinvested at the Assumed Reinvestment Rate for such
Series, (iii) no Mortgage Collateral is substituted by the Issuer or the Seller
in place of the Mortgage Collateral initially pledged to secure such Bonds and
(iv) if applicable, no portion of the Spread is applied to the payment of the
Bonds, unless the related Prospectus Supplement provides otherwise, in which
event such Stated Maturities will be based on the assumptions specified in such
Prospectus Supplement. If so provided in the related Prospectus Supplement,
holders of one or more Classes of Bonds of a Series may have the right, at their
option, to receive full payment in respect of such Bonds prior to Stated
Maturity, in each case to the extent and subject to the conditions specified in
such Prospectus Supplement.
 
     The rate of principal prepayments on pools of mortgage loans is influenced
by a variety of economic, geographic, social and other factors including,
without limitation, homeowner mobility, economic conditions, the presence and
enforceability of "due-on-sale" clauses, mortgage market interest rates and the
availability of mortgage funds, and no assurance can be given as to the actual
prepayment experience of the Mortgage Collateral. In general, however, if
interest rates vary significantly from those prevailing when the Pledged
Mortgages or the mortgage loans underlying the Certificates pledged as security
for a Series of Bonds were originated, such Pledged Mortgages and mortgage loans
are likely to be subject to higher or lower principal prepayments than if
interest rates remain at or near those prevailing when such Pledged Mortgages
and mortgage loans were originated. It should be noted that certain Certificates
pledged as security for a Series of Bonds may be backed by mortgage loans with
different interest rates, and, similarly, that not all of the Pledged Mortgages
securing a Series of Bonds are likely to bear the same interest rate.
Accordingly, the prepayment experience of these Certificates and Pledged
Mortgages will to some extent be a function of the mix of interest rates of the
underlying mortgage loans and of the Pledged Mortgages. Furthermore, the stated
certificate rate on certain Certificates may be less than the weighted average
interest rate of the underlying mortgage loans. See "SECURITY FOR THE BONDS"
herein.
 
BOOK-ENTRY BONDS
 
     As described in the related Prospectus Supplement, if not issued in fully
registered form, one or more Classes of Bonds of any Series (each, a Class of
"Book-Entry Bonds") will be registered as book-entry certificates. Persons
acquiring beneficial ownership interests in the Bonds ("Bond Owners") will hold
their Bonds through the Depository Trust Company ("DTC") in the United States,
or CEDEL or Euroclear (in Europe) if they are participants of such systems, or
indirectly through organizations which are participants in such systems. The
Book-Entry Bonds will be issued in one or more certificates which equal the
aggregate principal balance of the Bonds and will initially be registered in the
name of Cede & Co., the nominee of DTC. CEDEL and Euroclear will hold omnibus
positions on behalf of their participants through customers' securities accounts
in CEDEL's and Euroclear's names on the books of their respective depositaries
which in turn will hold such positions in customers' securities accounts in the
depositaries' names on the books of DTC. Citibank, N.A., will act as depositary
for CEDEL and The Chase Manhattan Bank will act as depositary for Euroclear (in
such capacities, individually the "Relevant Depositary" and collectively the
"European Depositaries"). Except as described below, no person acquiring a
Book-Entry Bond (each, a "beneficial
 
                                       34
<PAGE>   95
 
owner") will be entitled to receive a physical certificate representing such
Bond (a "Definitive Bond"). Unless and until Definitive Bonds are issued, it is
anticipated that the only "Bondholders" of the Bonds will be Cede & Co., as
nominee of DTC. Bond Owners are only permitted to exercise their rights
indirectly through Participants and DTC.
 
     The beneficial owner's ownership of a Book-Entry Bond will be recorded on
the records of the brokerage firm, bank, thrift institution or other financial
intermediary (each, a "Financial Intermediary") that maintains the beneficial
owner's account for such purpose. In turn, the Financial Intermediary's
ownership of such Book-Entry Bond will be recorded on the records of DTC (or of
a participating firm that acts as agent for the Financial Intermediary, whose
interest will in turn be recorded on the records of DTC, if the beneficial
owner's Financial Intermediary is not a DTC participant, and on the records of
CEDEL or Euroclear, as appropriate).
 
     Bond Owners will receive all distributions of principal of, and interest
on, the Bonds from the Bond Trustee through DTC and DTC participants. While the
Bonds are outstanding (except under the circumstances described below), under
the rules, regulations and procedures creating and affecting DTC and its
operations (the "Rules"), DTC is required to make book-entry transfers among
Participants on whose behalf it acts with respect to the Bonds and is required
to receive and transmit distributions of principal of, and interest on, the
Bonds. Participants and indirect participants with whom Bond Owners have
accounts with respect to Bonds are similarly required to make book-entry
transfers and receive and transmit such distributions on behalf of their
respective Bond Owners. Accordingly, although Bond Owners will not possess
certificates, the Rules provide a mechanism by which Bond Owners will receive
distributions and will be able to transfer their interest.
 
     Bond Owners will not receive or be entitled to receive certificates
representing their respective interests in the Bonds, except under the limited
circumstances described below. Unless and until Definitive Bonds are issued,
Bond Owners who are not Participants may transfer ownership of Bonds only
through Participants and indirect participants by instructing such Participants
and indirect participants to transfer Bonds, by book-entry transfer, through DTC
for the account of the purchasers of such Bonds, which account is maintained
with their respective Participants. Under the Rules and in accordance with DTC's
normal procedures, transfers of ownership of Bonds will be executed through DTC
and the accounts of the respective Participants at DTC will be debited and
credited. Similarly, the Participants and indirect participants will make debits
or credits, as the case may be, on their records on behalf of the selling and
purchasing Bond Owners.
 
     Because of time zone differences, credits of securities received in CEDEL
or Euroclear as a result of a transaction with a Participant will be made during
subsequent securities settlement processing and dated the business day following
the DTC settlement date. Such credits or any transactions in such securities
settled during such processing will be reported to the relevant Euroclear or
CEDEL Participants on such business day. Cash received in CEDEL or Euroclear as
a result of sales of securities by or through a CEDEL Participant (as defined
herein) or Euroclear Participant (as defined herein) to a DTC Participant will
be received with value on the DTC settlement date but will be available in the
relevant CEDEL or Euroclear cash account only as of the business day following
settlement in DTC.
 
     Transfers between Participants will occur in accordance with DTC Rules.
Transfers between CEDEL Participants and Euroclear Participants will occur in
accordance with their respective rules and operating procedures.
 
     Cross-market transfers between persons holding directly or indirectly
through DTC, on the one hand, and directly or indirectly through CEDEL
Participants or Euroclear Participants, on the other, will be effected in DTC in
accordance with DTC rules on behalf of the relevant European international
clearing system by the Relevant Depositary; however, such cross-market
transactions will require delivery of instructions to the relevant European
international clearing system by the counterparty in such system in accordance
with its rules and procedures and within its established deadlines (European
time). The relevant European international clearing system will, if the
transaction meets its settlement requirements, deliver instructions to the
Relevant Depositary to take action to effect final settlement on its behalf by
delivering or receiving securities in DTC, and making or receiving payment in
accordance with normal procedures for same day fund
 
                                       35
<PAGE>   96
 
settlement applicable to DTC. CEDEL Participants and Euroclear Participants may
not deliver instructions directly to the European Depositaries.
 
     CEDEL is incorporated under the laws of Luxembourg as a professional
depository. CEDEL holds securities for its participating organizations ("CEDEL
Participants") and facilitates the clearance and settlement of securities
transactions between CEDEL Participants through electronic book-entry changes in
accounts of CEDEL Participants, thereby eliminating the need for physical
movement of certificates. Transactions may be settled in CEDEL in any of 28
currencies, including United States dollars. CEDEL provides to its CEDEL
Participants, among other things, services for safekeeping, administration,
clearance and settlement of internationally traded securities and securities
lending and borrowing. CEDEL interfaces with domestic markets in several
countries. As a professional depository, CEDEL is subject to regulation by the
Luxembourg Monetary Institute. CEDEL participants are recognized financial
institutions around the world, including underwriters, securities brokers and
dealers, banks, trust companies, clearing corporations and certain other
organizations. Indirect access to CEDEL is also available to others, such as
banks, brokers, dealers and trust companies that clear through or maintain a
custodial relationship with a CEDEL Participant, either directly or indirectly.
 
     Euroclear was created in 1968 to hold securities for its participants
("Euroclear Participants") and to clear and settle transactions between
Euroclear Participants through simultaneous electronic book-entry delivery
against payment, thereby eliminating the need for physical movement of
certificates and any risk from lack of simultaneous transfers of securities and
cash. Transactions may be settled in any of 32 currencies, including United
States dollars. Euroclear includes various other services, including securities
lending and borrowing and interfaces with domestic markets in several countries
generally similar to the arrangements for cross-market transfers with DTC
described above. Euroclear is operated by the Brussels, Belgium office of Morgan
Guaranty Trust Company of New York ("Morgan" and in such capacity, the
"Euroclear Operator"), under contract with Euroclear Clearance Systems S.C., a
Belgian cooperative corporation (the "Belgian Cooperative"). All operations are
conducted by Morgan, and all Euroclear securities clearance accounts and
Euroclear cash accounts are accounts with the Euroclear Operator, not the
Belgian Cooperative. The Belgian Cooperative establishes policy for Euroclear on
behalf of Euroclear Participants. Euroclear Participants include banks
(including central banks), securities brokers and dealers and other professional
financial intermediaries. Indirect access to Euroclear is also available to
other firms that clear through or maintain a custodial relationship with a
Euroclear Participant, either directly or indirectly.
 
     Morgan is the Belgian branch of a New York banking corporation which is a
member bank of the Federal Reserve System. As such, it is regulated and examined
by the Board of Governors of the Federal Reserve System and the New York State
Banking Department, as well as the Belgian Banking Commission.
 
     Securities clearance accounts and cash accounts with Morgan are governed by
the Terms and Conditions Governing Use of Euroclear and the related Operating
Procedures of the Euroclear System and applicable Belgian law (collectively, the
"Terms and Conditions"). The Terms and Conditions govern transfers of securities
and cash within Euroclear, withdrawals of securities and cash from Euroclear,
and receipts of payments with respect to securities in Euroclear. All securities
in Euroclear are held on a fungible basis without attribution of specific
certificates to specific securities clearance accounts. The Euroclear Operator
acts under the Terms and Conditions only on behalf of Euroclear Participants,
and has no record of or relationship with persons holding through Euroclear
Participants.
 
     Under a book-entry format, beneficial owners of the Book-Entry Bonds may
experience some delay in their receipt of payments, since such payments will be
forwarded by the Bond Trustee to Cede & Co., as nominee of DTC. Distributions
with respect to Bonds held through CEDEL or Euroclear will be credited to the
cash accounts of CEDEL Participants or Euroclear Participants in accordance with
the relevant system's rules and procedures, to the extent received by the
Relevant Depositary. Such distributions will be subject to tax reporting in
accordance with relevant United States tax laws and regulations. See "FEDERAL
INCOME TAX CONSEQUENCES -- Withholding with Respect to Certain Foreign
Investors" and " -- Backup Withholding" herein. Because DTC can only act on
behalf of Financial Intermediaries, the ability of a beneficial owner to pledge
Book-Entry Bonds to persons or entities that do not participate in the
depository
 
                                       36
<PAGE>   97
 
system may be limited due to the lack of physical certificates for such
Book-Entry Bonds. In addition, issuance of the Book-Entry Bonds in book-entry
form may reduce the liquidity of such Bonds in the secondary market since
certain potential investors may be unwilling to purchase Bonds for which they
cannot obtain physical certificates.
 
     Monthly and annual reports on the Issuer will be provided to Cede & Co., as
nominee of DTC, and may be made available by Cede & Co. to beneficial owners
upon request, in accordance with the rules, regulations and procedures creating
and affecting DTC, and to the Financial Intermediaries to whose DTC accounts the
Book-Entry Bonds or such beneficial owners are credited.
 
     DTC has advised the Bond Trustee that, unless and until Definitive Bonds
are issued, DTC will take any action permitted to be taken by the holders of the
Book-Entry Bonds under the Indenture only at the direction of one or more
Financial Intermediaries to whose DTC accounts the Book-Entry Bonds are
credited, to the extent that such actions are taken on behalf of Financial
Intermediaries whose holdings include such Book-Entry Bonds. CEDEL or the
Euroclear Operator, as the case may be, will take any other action permitted to
be taken by a Bondholder under the Indenture on behalf of a CEDEL Participant or
Euroclear Participant only in accordance with its relevant rules and procedures
and subject to the ability of the Relevant Depositary to effect such actions on
its behalf through DTC. DTC may take actions with respect to some Bonds, at the
direction of the related Participants, which conflict with actions taken with
respect to other Bonds.
 
     Upon the occurrence of any of the events described in the immediately
preceding paragraph, the Bond Trustee will be required to notify all beneficial
owners of the occurrence of such event and the availability through DTC of the
Definitive Bonds. Upon surrender by DTC of the global certificate or
certificates representing the Book-Entry Bonds and instructions for
re-registration, the Bond Trustee will issue Definitive Bonds, and thereafter
the Bond Trustee will recognize the holders of such Definitive Bonds as
Bondholders under the Indenture.
 
     Although DTC, CEDEL and Euroclear have agreed to the foregoing procedures
in order to facilitate transfers of Bonds among participants of DTC, CEDEL and
Euroclear, they are under no obligation to perform or continue to perform such
procedures and such procedures may be discontinued at any time.
 
     None of the Master Servicer, the Depositor, the Issuer or the Bond Trustee
will have any responsibility for any aspect of the records relating to or
payments made on account of beneficial ownership interests of the Book-Entry
Bonds held by Cede & Co., as nominee of DTC, or for maintaining, supervising or
reviewing any records relating to such beneficial ownership interests.
 
                             SECURITY FOR THE BONDS
 
GENERAL
 
     Each Series of Bonds will be secured by assignments to the Bond Trustee of
collateral (the "Collateral") consisting of (i) the Mortgage Collateral pledged
as security for such Series of Bonds, (ii) funds on deposit in the Bond Account
and the Distribution Account under the Indenture for such Series of Bonds
representing payments and prepayments on Mortgage Collateral, including, to the
extent applicable, all payments which may become due under any applicable
hazard, mortgage guaranty, mortgagor bankruptcy, title insurance and bond
insurance policies (collectively, the "Insurance Proceeds") and the proceeds
(the "Liquidation Proceeds") of foreclosure or settlement of defaulted Pledged
Mortgages each as required to be remitted to the Bond Trustee, (iii) cash,
certificates of deposit, letters of credit, surety bonds, reinvestment income,
guaranteed investment contracts or any combination thereof in the aggregate
amount, if any, specified in the related Prospectus Supplement to be deposited
by the Issuer in a related Reserve Fund, (iv) the amount of cash, if any,
specified in the related Prospectus Supplement, to be initially deposited by the
Issuer in the related Bond Account, (v) certain cash accounts, insurance
policies, surety bonds, reinvestment income, guarantees, letters of credit,
crosscollateralization, overcollateralization, excess spread or derivative
arrangements, as specified herein and in the related Prospectus Supplement, (vi)
to the extent applicable, the reinvestment income on all of the foregoing, (vii)
the Issuer's rights under the Master Servicing Agreement
 
                                       37
<PAGE>   98
 
with respect to the Series of Bonds, (viii) the Issuer's rights under the
Mortgage Loan Purchase Agreement with respect to the Series of Bonds, (ix)
amounts (excluding any reinvestment income thereon) deposited in the related
early remittance account, if any, under the Indenture for such Series of Bonds
and (x) the Issuer's rights under certain of the Mortgage Pool Insurance
Policies and/or Bond Insurance Policies obtained for such Series of Bonds.
Scheduled payments on the Mortgage Collateral securing a Series of Bonds and
amounts, if any, initially deposited in the related Bond Account, together with,
to the extent applicable, the earnings thereon at the Assumed Reinvestment Rate
for such Series specified in the related Prospectus Supplement and, if
applicable, amounts available to be withdrawn from any related Reserve Fund,
will be sufficient to make timely payments of interest on the Bonds of such
Series and to retire each Class of Bonds comprising such Series not later than
the Stated Maturity of such Class of Bonds specified in the related Prospectus
Supplement.
 
     Each Prospectus Supplement relating to a Series of Bonds will include
information as to (i) the approximate aggregate principal amount of the Mortgage
Collateral securing such Series and whether the Mortgage Collateral consists of
Pledged Mortgages, GNMA Certificates, FNMA Certificates, FHLMC Certificates,
Private Mortgage-Backed Securities or some combination of Pledged Mortgages and
Certificates and (ii) the approximate weighted average terms to maturity of such
Mortgage Collateral.
 
     The Collateral securing each Series of Bonds will equally and ratably
secure each Class of the Bonds of such Series, and the Collateral securing such
Series will serve as collateral only for that Series of Bonds, except to the
extent that any Mortgage Pool Insurance Policies, Special Hazard Insurance
Policies, Bankruptcy Bonds or other form of credit enhancement specified herein
may, if specified in the related Prospectus Supplement, be pledged to secure
more than one Series of Bonds. See "CREDIT ENHANCEMENT" herein.
 
     The following is a brief description of the Mortgage Collateral expected to
secure a Series of Bonds. If specific information respecting the Mortgage
Collateral is not known at the time the related Series of Bonds initially is
offered, more general information of the nature described below will be provided
in the related Prospectus Supplement, and specific information will be set forth
in a report on Form 8-K to be filed with the Securities and Exchange Commission
within fifteen days after the initial issuance of such Bonds (the "Detailed
Description"). A schedule of the Mortgage Collateral relating to such Series of
Bonds will be attached to the Indenture delivered to the Bond Trustee upon
delivery of the Bonds.
 
THE PLEDGED MORTGAGES
 
     General. All of the Pledged Mortgages will be contributed to the Company's
capital by Redwood Trust (or an affiliate) or acquired by the Company from
Redwood Trust (or an affiliate) or another Seller and will be master serviced by
the Master Servicer specified in the related Prospectus Supplement. See
"SERVICING OF THE PLEDGED MORTGAGES" herein. Pledged Mortgages contributed to or
acquired by the Company will have been originated in accordance with the
underwriting criteria specified under "MORTGAGE LOAN PROGRAM -- Underwriting
Standards" herein and in the related Prospectus Supplement. The Pledged
Mortgages securing a Series of Bonds will consist solely of conventional loans
secured by first or junior liens on one- to four-family residential properties.
See "CERTAIN LEGAL ASPECTS OF PLEDGED MORTGAGES -- General" herein. The real
property constituting security for repayment of a Pledged Mortgage (each, a
"Mortgaged Property") may be located in any one of the fifty states, the
District of Columbia, Guam, Puerto Rico, any other territory of the United
States or such other location as may be specified in the related Prospectus
Supplement. Pledged Mortgages with certain Loan-to-Value Ratios and/or certain
principal balances may be covered wholly or partially by primary mortgage
insurance policies (each, a "Primary Mortgage Insurance Policy"). The existence,
extent and duration of any such coverage will be described in the applicable
Prospectus Supplement.
 
     Unless otherwise specified in the related Prospectus Supplement, all of the
Pledged Mortgages securing a Series of Bonds will have monthly payments due on
the first day of each month. Such monthly installments on each such Pledged
Mortgage, net of (i) applicable servicing compensation or master servicing
compensation, (ii) amounts retained by the Master Servicer or Servicer (as
defined herein) to be applied to the payment of premiums for certain Mortgage
Pool Insurance Policies and, if applicable, bond insurance policies and
 
                                       38
<PAGE>   99
 
(iii) amounts retained to reimburse the Master Servicer or Servicer for certain
advances it has made, will be payable to the Bond Trustee by the Master Servicer
on or before the monthly remittance date specified in the Prospectus Supplement
relating to the Series of Bonds secured by such Pledged Mortgages (each, a
"Remittance Date"). See "SERVICING OF THE PLEDGED MORTGAGES -- Payments on
Pledged Mortgages" and " -- Advances and Other Amounts Payable by Master
Servicer" herein. The payment terms of the Pledged Mortgages securing a Series
of Bonds will be described in the related Prospectus Supplement and may include
any of the following features or combination thereof or other features described
in the related Prospectus Supplement:
 
          (a) Interest may be payable at a fixed rate, a rate adjustable from
     time to time in relation to an index (which will be specified in the
     related Prospectus Supplement), a rate that is fixed for a period of time
     or under certain circumstances and is followed by an adjustable rate, a
     rate that otherwise varies from time to time, or a rate that is convertible
     from an adjustable rate to a fixed rate. Changes to an adjustable rate may
     be subject to periodic limitations, maximum rates, minimum rates or a
     combination of such limitations as set forth in the related Mortgage Note.
     Accrued interest may be deferred and added to the principal of a loan for
     such periods and under such circumstances as may be specified in the
     related Prospectus Supplement. A Mortgage Note may provide for the payment
     of interest at a rate lower than the Mortgage Rate specified in such
     Mortgage Note for a period of time or for the life of the loan and the
     amount of any difference may be contributed from funds supplied by the
     seller of the Mortgaged Property or another source.
 
          (b) Principal may be payable on a level debt service basis to fully
     amortize the Pledged Mortgage over its term, may be calculated on the basis
     of an assumed amortization schedule that is significantly longer than the
     original term to maturity or on an interest rate that is different from the
     Mortgage Rate or may not be amortized during all or a portion of the
     original term. Payment of all or a substantial portion of the principal may
     be due on maturity ("balloon payments"). Principal may include interest
     that has been deferred and added to the principal balance of the Pledged
     Mortgage.
 
          (c) Monthly payments of principal and interest may be fixed for the
     life of the Pledged Mortgage, may increase over a specified period of time
     or may change from period to period. The terms of a Pledged Mortgage may
     include limits on periodic increases or decreases in the amount of monthly
     payments and may include maximum or minimum amounts of monthly payments.
 
          (d) The Pledged Mortgages may be prepaid (i) at any time without the
     payment of any prepayment fee or (ii) subject to a prepayment fee, which
     may be fixed for the life of any such Pledged Mortgage or may decline over
     time, and may be prohibited for the life of such Pledged Mortgage or for
     certain periods ("lockout periods"). Certain Pledged Mortgages may permit
     prepayments after expiration of the applicable lockout period and may
     require the payment of a prepayment fee in connection with any such
     subsequent prepayment. Other Pledged Mortgages may permit prepayments
     without payment of a fee unless the prepayment occurs during specified time
     periods. The loans may include "due-on-sale" clauses that permit the
     mortgagee to demand payment of the entire Pledged Mortgage in connection
     with the sale or certain transfers of the related Mortgaged Property. Other
     Pledged Mortgages may be assumable by persons meeting the then applicable
     underwriting standards. See "MORTGAGE LOAN PROGRAM -- Underwriting
     Standards" herein.
 
     The Mortgage Collateral securing a Series of Bonds may include certain
Pledged Mortgages ("Buydown Loans") that include provisions whereby a third
party partially subsidizes the monthly payments of the Mortgagors during the
early years of such Pledged Mortgages, the difference to be made up from a fund
(a "Buydown Fund") contributed by such third party at the time of origination of
the Pledged Mortgage. A Buydown Fund will be in an amount equal either to the
discounted value or full aggregate amount of future payment subsidies. The
underlying assumption of buydown plans is that the income of the Mortgagor will
increase during the buydown period as a result of normal increases in
compensation and inflation, so that the Mortgagor will be able to meet the full
mortgage payments at the end of the buydown period. To the extent that this
assumption as to increased income is not fulfilled, the possibility of defaults
on Buydown Loans is increased. The related Prospectus Supplement will contain
information with respect to any Buydown Loan
 
                                       39
<PAGE>   100
 
concerning limitations on the interest rate paid by the Mortgagor initially, on
annual increases in the interest rate and on the length of the buydown period.
 
     Each Prospectus Supplement will contain information, as of the date or
dates set forth in such Prospectus Supplement and to the extent then
specifically known to the Company, with respect to the Pledged Mortgages
securing the related Series of Bonds, including (i) the aggregate outstanding
principal balance and the average outstanding principal balance of the Pledged
Mortgages as of the date pledged to secure the related Series of Bonds, (ii) the
types of property securing the Pledged Mortgages, (iii) the original terms to
maturity of the Pledged Mortgages, (iv) the earliest origination date and latest
maturity date of any of the Pledged Mortgages, (v) the maximum and minimum per
annum Mortgage Rates and (vi) the geographical distribution of the Pledged
Mortgages.
 
     No assurance can be given that values of the Mortgaged Properties have
remained or will remain at their levels on the dates of origination of the
related Pledged Mortgages. If the residential real estate market should
experience an overall decline in property values such that the outstanding
principal balances of the Pledged Mortgages, and any secondary financing on the
Mortgaged Properties, securing a Series of Bonds become equal to or greater than
the value of the Mortgaged Properties, the actual rates of delinquencies,
foreclosures and losses could be higher than those now generally experienced in
the mortgage lending industry. In addition, adverse economic conditions and
other factors (which may or may not affect real property values) may affect the
timely payment by Mortgagors of scheduled payments of principal and interest on
the Pledged Mortgages and, accordingly, the actual rates of delinquencies,
foreclosures and losses with respect to any Mortgage Collateral. To the extent
that such losses are not covered by subordination provisions, any other credit
enhancement or alternative arrangements described herein and in the related
Prospectus Supplement, such losses will be borne, at least in part, by the
holders of the Bonds of the related Series.
 
     The Issuer will cause the Pledged Mortgages securing each Series of Bonds
to be pledged to the Bond Trustee named in the related Prospectus Supplement for
the benefit of the Bondholders of such Series. The Master Servicer will service
the Pledged Mortgages, or enforce the servicing obligations of other mortgage
servicing institutions ("Servicers"), pursuant to a Master Servicing Agreement
(as defined herein), and will receive a fee for such services. See "MORTGAGE
LOAN PROGRAM" and "SERVICING OF THE PLEDGED MORTGAGES" herein.
 
     The obligations of the Master Servicer with respect to the Pledged
Mortgages will consist principally of its contractual master servicing
obligations under the related Master Servicing Agreement (including its
obligation to enforce the obligations of the Servicers) as more fully described
herein under "MORTGAGE LOAN PROGRAM -- Representations by Sellers; Repurchases"
and under "SERVICING OF THE PLEDGED MORTGAGES."
 
     Pledged Mortgages will consist of mortgage loans or deeds of trust secured
by first or junior liens on one-to four-family residential properties. If
provided in the related Prospectus Supplement, certain of the Pledged Mortgages
may be secured by junior liens where the related senior liens ("Senior Liens")
are not to be included as part of the Mortgage Collateral. Holders of such
Pledged Mortgages secured by junior liens are subject to the risk that adequate
funds will not be received in connection with a foreclosure of the related
Senior Liens to satisfy fully both the Senior Liens and the Pledged Mortgages.
In the event that a holder of a Senior Lien forecloses on a Mortgaged Property,
the proceeds of the foreclosure or similar sale will be applied first to the
payment of court costs and fees in connection with the foreclosure, second to
real estate taxes, third in satisfaction of all principal, interest, prepayment
or acceleration penalties, if any, and any other sums due and owing to the
holder of the Senior Liens. The claims of the holders of the Senior Liens will
be satisfied in full out of proceeds of the liquidation of the related Mortgaged
Property, if such proceeds are sufficient, before the Issuer as holder of the
junior lien receives any payments in respect of the Pledged Mortgage. If the
Master Servicer or a Servicer were to foreclose on any such Pledged Mortgage, it
would do so subject to any related Senior Liens. In order for the debt related
to the Pledged Mortgage to be paid in full at such sale, a bidder at the
foreclosure sale of such Pledged Mortgage would have to bid an amount sufficient
to pay off all sums due under the Pledged Mortgage and the Senior Liens or
purchase the Mortgaged Property subject to the Senior Liens. In the event that
such proceeds from a foreclosure or similar sale of the related Mortgaged
Property are
 
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<PAGE>   101
 
insufficient to satisfy all Senior Liens and the Pledged Mortgage in the
aggregate, the Issuer, as the holder of the junior liens, and, accordingly,
holders of one or more classes of the Bonds of the related Series, bear (i) the
risk of delay in distributions while a deficiency judgment against the borrower
is obtained and (ii) the risk of loss if the deficiency judgment is not realized
upon or if a deficiency judgment cannot be pursued. Moreover, deficiency
judgments may not be available in certain jurisdictions or the Pledged Mortgage
may be nonrecourse. In addition, a junior mortgagee may not foreclose on the
property securing a junior mortgage unless it forecloses subject to the senior
mortgages.
 
     If so specified in the related Prospectus Supplement, the Pledged Mortgages
may include cooperative apartment loans ("Cooperative Loans") secured by
security interests in shares issued by private, non-profit, cooperative housing
corporations ("Cooperatives") and in the related proprietary leases or occupancy
agreements granting exclusive rights to occupy specific dwelling units in such
Cooperatives' buildings.
 
     The Mortgaged Properties relating to Pledged Mortgages will consist of
detached or semi-detached one-family dwelling units, two- to four-family
dwelling units, townhouses, rowhouses, individual condominium units, individual
units in planned unit developments and certain other dwelling units. Such
Mortgaged Properties may include vacation and second homes, investment
properties and leasehold interests. In the case of leasehold interests, the term
of the leasehold will exceed the scheduled maturity of the Pledged Mortgages by
at least five years, or such other period specified in the related Prospectus
Supplement.
 
     ASSIGNMENT OF PLEDGED MORTGAGES TO BOND TRUSTEE.  Assignments of the
mortgages or deeds of trust in recordable form, naming the Bond Trustee as
assignee, will be executed and, subject to release for recording purposes,
delivered to the Bond Trustee along with certain other original documents
evidencing the Pledged Mortgages, including the related Mortgage Notes. The
original mortgage documents will be held by the Bond Trustee or its custodian,
except to the extent released to the Master Servicer or any Servicer from time
to time in connection with its respective servicing activities. Except as
otherwise specified in the related Prospectus Supplement, the Issuer will
promptly cause the assignments of the related Pledged Mortgages to be recorded
in the appropriate public office for real property records, except in states in
which, in the opinion of counsel acceptable to the Bond Trustee, such recording
is not required to protect the Bond Trustee's interest in such Pledged Mortgages
against the claim of any subsequent transferee or any successor to or creditor
of the Issuer or the originator of such Pledged Mortgage. In the event an
assignment of a Pledged Mortgage to the Bond Trustee is not recorded or the
opinion referred to above is not delivered to the Bond Trustee within the period
specified in the related Prospectus Supplement, Redwood Trust, may, if required
by the Bond Trustee in accordance with the terms of the Indenture, be obligated
to (i) purchase such Pledged Mortgage at a price equal to the outstanding
principal balance thereof on the date of such purchase plus accrued and unpaid
interest thereon to the first day of the month following the month in which such
Pledged Mortgage is purchased and deposit such amount in the Bond Account for
such Series of Bonds or (ii) if permitted by the applicable provisions of the
Indenture and the Mortgage Loan Purchase Agreement with respect to such Series
of Bonds, replace such Pledged Mortgage with an eligible substitute mortgage
loan (an "Eligible Substitute Pledged Mortgage"). See " -- Substitution of
Mortgage Collateral" herein.
 
AGENCY SECURITIES
 
     GENERAL.  The Agency Securities securing a Series of Bonds will consist of
(i) fully modified pass-through mortgage-backed certificates guaranteed as to
timely payment of principal and interest by the Government National Mortgage
Association ("GNMA Certificates"), (ii) certificates ("Guaranteed Mortgage
Pass-Through Certificates") issued and guaranteed as to timely payment of
principal and interest by the Federal National Mortgage Association ("FNMA
Certificates"), (iii) mortgage participation certificates issued and guaranteed
as to timely payment of interest and, unless otherwise specified in the related
Prospectus Supplement, ultimate payment of principal by the Federal Home Loan
Mortgage Corporation ("FHLMC Certificates"), (iv) stripped mortgage-backed
securities representing an undivided interest in all or a part of either the
principal distributions (but not the interest distributions) or the interest
distributions (but not the principal distributions) or in some specified portion
of the principal and interest distributions (but not all of such distributions)
on certain GNMA, FNMA or FHLMC Certificates and, unless otherwise specified in
the related Prospectus Supplement, guaranteed to the same extent as the
underlying securities,
 
                                       41
<PAGE>   102
 
(v) another type of pass-through certificate issued or guaranteed by GNMA, FNMA
or FHLMC and described in the related Prospectus Supplement or (vi) a
combination of such Agency Securities.
 
     GNMA CERTIFICATES.  GNMA is a wholly-owned corporate instrumentality of the
United States with the Department of Housing and Urban Development. Section
306(g) of Title III of the National Housing Act of 1934, as amended (the
"Housing Act"), authorizes GNMA to guarantee the timely payment of the principal
of, and interest on, GNMA Certificates that represent an interest in a pool of
mortgage loans insured by the FHA under the Housing Act or Title V of the
Housing Act of 1949 ("FHA Loans"), or partially guaranteed by the VA under the
Servicemen's Readjustment Act of 1944, as amended, or Chapter 37 of Title 38,
United States Code ("VA Loans").
 
     Section 306(g) of the Housing Act provides that "the full faith and credit
of the United States is pledged to the payment of all amounts which may be
required to be paid under any guaranty under this subsection." In order to meet
its obligations under such guaranty, GNMA may, under Section 306(d) of the
Housing Act, borrow from the United States Treasury in an unlimited amount which
is at any time sufficient to enable GNMA to perform its obligations under its
guaranty.
 
     Each GNMA Certificate pledged to secure a Series of Bonds (which may be
issued under either the GNMA I program (each such certificate, a "GNMA I
Certificate") or the GNMA II program (each such certificate, a "GNMA II
Certificate")) will be a "fully modified pass-through" mortgage-backed
certificate issued and serviced by a mortgage banking company or other financial
concern ("GNMA Issuer") approved by GNMA or by FNMA as a seller-servicer of FHA
Loans and/or VA Loans. The mortgage loans underlying the GNMA Certificates will
consist of FHA Loans and/or VA Loans. Each such mortgage loan is secured by a
one- to four-family or multifamily residential property. GNMA will approve the
issuance of each such GNMA Certificate in accordance with a guaranty agreement
(a "Guaranty Agreement") between GNMA and the GNMA Issuer. Pursuant to its
Guaranty Agreement, a GNMA Issuer will be required to advance its own funds in
order to make timely payments of all amounts due on each such GNMA Certificate
if the payments received by the GNMA Issuer on the FHA Loans or VA Loans
underlying each such GNMA Certificate are less than the amounts due on each such
GNMA Certificate.
 
     The full and timely payment of principal of and interest on each GNMA
Certificate will be guaranteed by GNMA, which obligation is backed by the full
faith and credit of the United States. Each such GNMA Certificate will have an
original maturity of not more than 30 years (but may have original maturities of
substantially less than 30 years). Each such GNMA Certificate will be based on
and backed by a pool of FHA Loans or VA Loans secured by one- to four-family
residential properties and will provide for the payment by or on behalf of the
GNMA Issuer to the registered holder of such GNMA Certificate of scheduled
monthly payments of principal and interest equal to the registered holder's
proportionate interest in the aggregate amount of the monthly principal and
interest payment on each FHA Loan or VA Loan underlying such GNMA Certificate,
less the applicable servicing and guaranty fee, which together equal the
difference between the interest on the FHA Loan or VA Loan and the pass-through
rate on the GNMA Certificate. In addition, each payment will include
proportionate pass-through payments of any prepayments of principal on the FHA
Loans or VA Loans underlying such GNMA Certificate and liquidation proceeds in
the event of a foreclosure or other disposition of any such FHA Loans or VA
Loans.
 
     If a GNMA Issuer is unable to make the payments on a GNMA Certificate as it
becomes due, it must promptly notify GNMA and request GNMA to make such payment.
Upon notification and request, GNMA will make such payments directly to the
registered holder of such GNMA Certificate. In the event no payment is made by a
GNMA Issuer and the GNMA Issuer fails to notify and request GNMA to make such
payment, the holder of such GNMA Certificate will have recourse only against
GNMA to obtain such payment. The Bond Trustee or its nominee, as registered
holder of the GNMA Certificates securing a Series of Bonds will have the right
to proceed directly against GNMA under the terms of the Guaranty Agreements
relating to such GNMA Certificates for any amounts that are not paid when due.
 
     All mortgage loans underlying a particular GNMA I Certificate must have the
same interest rate (except for pools of mortgage loans secured by manufactured
homes) over the term of the loan. The interest rate on such GNMA I Certificate
will equal the interest rate on the mortgage loans included in the pool of
mortgage
 
                                       42
<PAGE>   103
 
loans underlying such GNMA I Certificate, less one-half percentage point per
annum of the unpaid principal balance of the mortgage loans.
 
     Mortgage loans underlying a particular GNMA II Certificate may have per
annum interest rates that vary from each other by up to one percentage point.
The interest rate on each GNMA II Certificate will be between one-half
percentage point and one and one-half percentage points lower than the highest
interest rate on the mortgage loans included in the pool of mortgage loans
underlying such GNMA II Certificate (except for pools of mortgage loans secured
by manufactured homes).
 
     Regular monthly installment payments on each GNMA Certificate securing a
Series of Bonds will be comprised of interest due as specified on such GNMA
Certificate plus the scheduled principal payments on the FHA Loans or VA Loans
underlying such GNMA Certificate due on the first day of the month in which the
scheduled monthly installments on such GNMA Certificate are due. Such regular
monthly installments on each such GNMA Certificate are required to be paid to
the registered holder by the 15th day of each month in the case of a GNMA I
Certificate and are required to be mailed to the registered holder by the 20th
day of each month in the case of a GNMA II Certificate. Any principal
prepayments on any FHA Loans or VA Loans underlying a GNMA Certificate securing
a Series of Bonds or any other early recovery of principal on such loans will be
passed through to the registered holder of such GNMA Certificate.
 
     GNMA Certificates may be backed by graduated payment mortgage loans or by
Buydown Loans for which funds will have been provided (and deposited into escrow
accounts) for application to the payment of a portion of the borrowers' monthly
payments during the early years of such mortgage loan. Payments due the
registered holders of GNMA Certificates backed by pools containing Buydown Loans
will be computed in the same manner as payments derived from other GNMA
Certificates and will include amounts to be collected from both the borrower and
the related escrow account. The graduated payment mortgage loans will provide
for graduated interest payments that, during the early years of such mortgage
loans, will be less than the amount of stated interest on such mortgage loans.
The interest not so paid will be added to the principal of such graduated
payment mortgage loans and, together with interest thereon, will be paid in
subsequent years. The obligations of GNMA and of a GNMA Issuer will be the same
irrespective of whether the GNMA Certificates are backed by graduated payment
mortgage loans or Buydown Loans. No statistics comparable to the FHA's
prepayment experience on level payment, non-"buydown" mortgage loans are
available in respect of graduated payment or Buydown Loans. GNMA Certificates
related to a Series of Bonds may he held in book-entry form.
 
     The GNMA Certificates securing a Series of Bonds, and the related
underlying mortgage loans, may have characteristics and terms different from
those described above. Any such different characteristics and terms will be
described in the related Prospectus Supplement.
 
     FNMA CERTIFICATES.  FNMA is a federally chartered and privately owned
corporation organized and existing under the Federal National Mortgage
Association Charter Act, as amended. FNMA originally was established in 1938 as
a United States government agency to provide supplemental liquidity to the
mortgage market and was transformed into a stockholder-owned and
privately-managed corporation by legislation enacted in 1968.
 
     FNMA provides funds to the mortgage market primarily by purchasing mortgage
loans from lenders, thereby replenishing their funds for additional lending.
FNMA acquires funds to purchase mortgage loans from many capital market
investors that may not ordinarily invest in mortgages, thereby expanding the
total amount of funds available for housing. Operating nationwide, FNMA helps to
redistribute mortgage funds from capital-surplus to capital-short areas.
 
     FNMA Certificates are Guaranteed Mortgage Pass-Through Certificates
representing fractional undivided interests in a pool of mortgage loans formed
by FNMA. Each mortgage loan generally must meet the applicable standards of the
FNMA purchase program. Mortgage loans comprising a pool are either provided by
FNMA from its own portfolio or purchased pursuant to the criteria of the FNMA
purchase program.
 
     Mortgage loans underlying FNMA Certificates securing a Series of Bonds will
consist of conventional loans, FHA Loans or VA Loans. Original maturities of
substantially all of the conventional, level payment
 
                                       43
<PAGE>   104
 
mortgage loans underlying a FNMA Certificate are expected to be between either 8
to 15 years or 20 to 40 years. The original maturities of substantially all of
the fixed rate, level payment FHA Loans or VA Loans are expected to be 30 years.
 
     Mortgage loans underlying a FNMA Certificate may have annual interest rates
that vary by as much as two percentage points from each other. The rate of
interest payable on a FNMA Certificate is equal to the lowest interest rate of
any mortgage loan in the related pools, less a specified minimum annual
percentage representing servicing compensation and FNMA's guaranty fee. Under a
regular servicing option (pursuant to which the mortgagee or each other servicer
assumes the entire risk of foreclosure losses), the annual interest rates on the
mortgage loans underlying a FNMA Certificate will be between 50 basis points and
250 basis points greater than is its annual pass-through rate and under a
special servicing option (pursuant to which FNMA assumes the entire risk for
foreclosure losses), the annual interest rates on the mortgage loans underlying
a FNMA Certificate will generally be between 55 basis points and 255 basis
points greater than the annual FNMA Certificate pass-through rate. One "basis
point" is equal to one-hundredth of a percentage point (0.01%). If specified in
the related Prospectus Supplement, FNMA Certificates may be backed by adjustable
rate mortgages.
 
     FNMA guarantees to each registered holder of a FNMA Certificate that it
will distribute amounts representing such holder's proportionate share of
scheduled principal and interest payments at the applicable pass-through rate
provided for by such FNMA Certificate on the underlying mortgage loans, whether
or not received, and such holder's proportionate share of the full principal
amount of any foreclosed or other finally liquidated mortgage loan, whether or
not such principal amount is actually recovered. The obligations of FNMA under
its guaranties are obligations solely of FNMA and are not backed by, or entitled
to, the full faith and credit of the United States. Although the Secretary of
the Treasury of the United States has discretionary authority to lend FNMA up to
$2.25 billion outstanding at any time, neither the United States nor any agency
thereof is obligated to finance FNMA's operations or to assist FNMA in any other
manner. If FNMA were unable to satisfy its obligations, distributions to holders
of FNMA Certificates would consist solely of payments and other recoveries on
the underlying mortgage loans and accordingly, monthly distributions to holders
of FNMA Certificates would be affected by delinquent payments and defaults on
such mortgage loans.
 
     FNMA Certificates evidencing interests in pools of mortgage loans formed on
or after May 1, 1985 (other than FNMA Certificates backed by pools containing
graduated payment mortgage loans or mortgage loans secured by multifamily
projects) are available in book-entry form only. Distributions of principal and
interest on each FNMA Certificate will be made by FNMA on the 25th day of each
month to the persons in whose name the FNMA Certificate is entered in the books
of the Federal Reserve Banks (or registered on the FNMA Certificate register in
the case of fully registered FNMA Certificates) as of the close of business on
the last day of the preceding month. With respect to FNMA Certificates issued in
book-entry form, distributions thereon will be made by wire, and with respect to
fully registered FNMA Certificates, distributions thereon will be made by check.
 
     The FNMA Certificates securing a Series of Bonds, and the related
underlying mortgage loans, may have characteristics and terms different from
those described above. Any such different characteristics and terms will be
described in the related Prospectus Supplement.
 
     FHLMC CERTIFICATES.  FHLMC is a corporate instrumentality of the United
States created pursuant to Title III of the Emergency Home Finance Act of 1970,
as amended (the "FHLMC Act"). The common stock of FHLMC is owned by the Federal
Home Loan Banks and its preferred stock is owned by stockholders of the Federal
Home Loan Banks. FHLMC was established primarily for the purpose of increasing
the availability of mortgage credit for the financing of urgently needed
housing. It seeks to provide an enhanced degree of liquidity for residential
mortgage investments primarily by assisting in the development of secondary
markets for conventional mortgages. The principal activity of FHLMC currently
consists of the purchase of first lien, conventional mortgage loans or
participation interests in such mortgage loans and the sale of the mortgage
loans or participations so purchased in the form of guaranteed mortgage
securities, primarily FHLMC Certificates. FHLMC is confined to purchasing, so
far as practicable, mortgage loans that it deems
 
                                       44
<PAGE>   105
 
to be of such quality, type and class as to meet generally the purchase
standards imposed by private institutional mortgage investors.
 
     Each FHLMC Certificate represents an undivided interest in a pool of
mortgage loans that may consist of first lien Conventional Loans, FHA Loans or
VA Loans. FHLMC Certificates are sold under the terms of a Mortgage
Participation Certificate Agreement. A FHLMC Certificate may be issued under
either FHLMC's Cash Program or Guarantor Program.
 
     Mortgage loans underlying the FHLMC Certificates securing a Series of Bonds
will generally consist of mortgage loans with original terms to maturity of
between 10 and 40 years. Each such mortgage loan must meet the applicable
standards set forth in the FHLMC Act. A FHLMC Certificate group may include
whole loans, participation interests in whole loans and undivided interests in
whole loans and/or participations comprising another FHLMC Certificate group.
Under the Guarantor Program, any such FHLMC Certificate group may include only
whole loans or participation interests in whole loans.
 
     FHLMC guarantees to each registered holder of a FHLMC Certificate the
timely payment of interest on the underlying mortgage loans to the extent of the
applicable certificate interest rate on the registered holder's pro rata share
of the unpaid principal balance outstanding on the underlying mortgage loans in
the FHLMC Certificate group represented by such FHLMC Certificate, whether or
not received. FHLMC also guarantees to each registered holder of a FHLMC
Certificate collection by such holder of all principal on the underlying
mortgage loans, without any offset or deduction, to the extent of such holder's
pro rata share thereof, but does not, except if and to the extent specified in
the related Prospectus Supplement for a Series of Bonds, guarantee the timely
payment of scheduled principal. Under FHLMC's Gold PC Program, FHLMC guarantees
the timely payment of principal based on the difference between the pool factor
published in the month preceding the month of distribution and the pool factor
published in such month of distribution. Pursuant to its guaranties, FHLMC
indemnifies holders of FHLMC Certificates against any diminution in principal by
reason of charges for property repairs, maintenance and foreclosure. FHLMC may
remit the amount due on account of its guaranty of collection of principal at
any time after default on an underlying mortgage loan, but not later than (i) 30
days following foreclosure sale, (ii) 30 days following payment of the claim by
any mortgage insurer or (iii) 30 days following the expiration of any right of
redemption, whichever occurs later, but in any event no later than one year
after demand has been made upon the mortgagor for accelerated payment of
principal. In taking actions regarding the collection of principal after default
on the mortgage loans underlying FHLMC Certificates, including the timing of any
demand for acceleration, FHLMC reserves the right to exercise its judgment with
respect to the mortgage loans in the same manner as for mortgage loans that it
has purchased but not sold. The length of time necessary for FHLMC to determine
that a mortgage loan should be accelerated varies with the particular
circumstances of each mortgagor and FHLMC has not adopted standards which
require that the demand be made within any specified period.
 
     FHLMC Certificates are not guaranteed by the United States or by any
Federal Home Loan Bank and do not constitute debts or obligations of the United
States or any Federal Home Loan Bank. The obligations of FHLMC under its
guaranty are obligations solely of FHLMC and are not backed by, or entitled to,
the full faith and credit of the United States. If FHLMC were unable to satisfy
such obligations, distributions to holders of FHLMC Certificates would consist
solely of payments and other recoveries on the underlying mortgage loans and,
accordingly, monthly distributions to holders of FHLMC Certificates would be
affected by delinquent payments and defaults on such mortgage loans.
 
     Registered holders of FHLMC Certificates are entitled to receive their
monthly pro rata share of all principal payments on the underlying mortgage
loans received by FHLMC, including any scheduled principal payments, full and
partial prepayments of principal and principal received by FHLMC by virtue of
condemnation, insurance, liquidation or foreclosure and repurchases of the
mortgage loans by FHLMC or the seller thereof. FHLMC is required to remit each
registered FHLMC certificateholder's pro rata share of principal payments on the
underlying mortgage loans, interest at the FHLMC pass-through rate and any other
sums such as prepayment fees, within 60 days of the date on which such payments
are deemed to have been received by FHLMC.
 
                                       45
<PAGE>   106
 
     Under FHLMC's Cash Program, there is no limitation on the amount by which
interest rates on the mortgage loans underlying a FHLMC Certificate may exceed
the pass-through rate on the FHLMC Certificate. Under such program, FHLMC
purchases groups of whole mortgage loans from sellers at specified percentages
of their unpaid principal balances, adjusted for accrued or prepaid interest,
which when applied to the interest rate of the mortgage loans and participations
purchased results in the yield (expressed as a percentage) required by FHLMC.
The required yield, which includes a minimum servicing fee retained by the
servicer, is calculated using the outstanding principal balance. The range of
interest rates on the mortgage loans and participations in a FHLMC Certificate
group under the Cash Program will vary since mortgage loans and participations
are purchased and assigned to a FHLMC Certificate group based upon their yield
to FHLMC rather than on the interest rate on the underlying mortgage loans.
Under FHLMC's Guarantor Program, the pass-through rate on a FHLMC Certificate is
established based upon the lowest interest rate on the underlying mortgage
loans, minus a minimum servicing fee and the amount of FHLMC's management and
guaranty income as agreed upon between the seller and FHLMC.
 
     FHLMC Certificates duly presented for registration of ownership on or
before the last business day of a month are registered effective as of the first
day of the month. The first remittance to a registered holder of a FHLMC
Certificate will be distributed so as to be received normally by the 15th day of
the second month following the month in which the purchaser became a registered
holder of such FHLMC Certificate. Thereafter, such remittance will be
distributed monthly to the registered holder so as to be received normally by
the 15th day of each month. The Federal Reserve Bank of New York maintains
book-entry accounts with respect to FHLMC Certificates sold by FHLMC on or after
January 2, 1985, and makes payments of principal and interest each month to the
registered holders thereof in accordance with such holders' instructions.
 
PRIVATE MORTGAGE-BACKED SECURITIES
 
     Private Mortgage-Backed Securities may consist of (a) mortgage pass-through
certificates evidencing an undivided interest in a pool of mortgage loans or (b)
collateralized mortgage obligations secured by mortgage loans. Private
Mortgage-Backed Securities may include stripped mortgage-backed securities
representing an undivided interest in all or part of either the principal
distributions (but not the interest distributions) or the interest distributions
(but not the principal distributions) or in some specified portion of the
principal and interest distributions (but not all of such distributions) on
certain mortgage loans. Private Mortgage-Backed Securities will have been issued
pursuant to a pooling and servicing agreement, an indenture or similar agreement
(a "PMBS Agreement"). Unless otherwise specified in the related Prospectus
Supplement, the seller/servicer of the underlying mortgage loans will have
entered into the PMBS Agreement with the trustee under such PMBS Agreement (the
"PMBS Trustee"). The PMBS Trustee or its agent, or a custodian will possess the
mortgage loans underlying such Private Mortgage-Backed Security. Mortgage loans
underlying a Private Mortgage-Backed Security will be serviced by a servicer
(the "PMBS Servicer") directly or by one or more subservicers who may be subject
to the supervision of the PMBS Servicer. Private Mortgage-Backed Securities must
(i) either (a) have been previously registered under the Securities Act or (b)
if not so registered, held for at least the holding period required by Rule
144(k) under the Securities Act and (ii) be acquired in bona fide secondary
market transactions.
 
     The issuer of the Private Mortgage-Backed Securities (the "PMBS Issuer")
will be a financial institution or other entity engaged generally in the
business of mortgage lending, a public agency or instrumentality of a state,
local or federal government, or a limited purpose corporation organized for the
purpose of, among other things, establishing trusts and acquiring and selling
housing loans to such trusts and selling beneficial interests in such trusts. If
so specified in the related Prospectus Supplement, the PMBS Issuer may be an
affiliate of the Depositor. The obligations of the PMBS Issuer will generally be
limited to certain representations and warranties with respect to the assets
conveyed by it to the related trust. Unless otherwise specified in the related
Prospectus Supplement, the PMBS Issuer will not have guaranteed any of the
assets conveyed to the related trust or any of the Private Mortgage-Backed
Securities issued under the PMBS Agreement. Additionally, although the mortgage
loans underlying the Private Mortgage-Backed Securities may be
 
                                       46
<PAGE>   107
 
guaranteed by an agency or instrumentality of the United States, the Private
Mortgage-Backed Securities themselves will generally not be so guaranteed.
 
     Distributions of principal and interest will be made on the Private
Mortgage-Backed Securities on the dates specified in the related Prospectus
Supplement. The Private Mortgage-Backed Securities may be entitled to receive
nominal or no principal distributions or nominal or no interest distributions.
Principal and interest distributions will be made on the Private Mortgage-Backed
Securities by the PMBS Trustee or the PMBS Servicer. The PMBS Issuer or the PMBS
Servicer may have the right to repurchase assets underlying the Private
Mortgage-Backed Securities after a certain date or under the circumstances
specified in the related Prospectus Supplement.
 
     The mortgage loans underlying the Private Mortgage-Backed Securities may
consist of fixed rate, level payment, fully amortizing loans or graduated
payment mortgage loans, Buydown Loans, adjustable mortgage loans or loans having
balloon or other special payment features. Such mortgage loans may be secured by
single (one- to four-) family property or multifamily property or by an
assignment of the proprietary lease or occupancy agreement relating to a
specific dwelling within a Cooperative and the related shares issued by such
Cooperative.
 
     The Prospectus Supplement for a Series of Bonds for which the Mortgage
Collateral includes Private Mortgage-Backed Securities will specify the
aggregate approximate principal amount and type of the Private Mortgage-Backed
Securities to be included in the Mortgage Collateral and, as to any such Private
Mortgage-Backed Securities comprising a significant part of the Mortgage
Collateral, to the extent such information is known to the Issuer, will in
general include the following: (i) certain characteristics of the mortgage loans
that comprise the underlying assets for the Private Mortgage-Backed Securities
including (A) the payment features of such mortgage loans, (B) the approximate
aggregate principal balance of underlying mortgage loans insured or guaranteed
by a governmental entity, (C) the servicing fee or range of servicing fees with
respect to the mortgage loans and (D) the minimum and maximum stated maturities
of the underlying mortgage loans at origination; (ii) the maximum original term
to stated maturity of the Private Mortgage-Backed Securities; (iii) the weighted
average term to stated maturity of the Private Mortgage-Backed Securities; (iv)
the pass-through or interest rate of the Private Mortgage-Backed Securities; (v)
the weighted average pass-through or interest rate of the Private
Mortgage-Backed Securities; (vi) the PMBS Issuer, the PMBS Servicer (if other
than the PMBS Issuer) and the PMBS Trustee for such Private Mortgage-Backed
Securities; (vii) certain characteristics of credit support, if any, such as
reserve funds, insurance policies, surety bonds, letters of credit or guaranties
relating to the mortgage loans underlying the Private Mortgage-Backed Securities
or to such Private Mortgage-Backed Securities themselves; (viii) the terms on
which the underlying mortgage loans for such Private Mortgage-Backed Securities
may, or are required to, be purchased prior to their stated maturity or the
stated maturity of the Private Mortgage-Backed Securities and the terms of any
redemption or other call feature; and (ix) the terms on which mortgage loans may
be substituted for those originally underlying the Private Mortgage-Backed
Securities.
 
SUBSTITUTION OF MORTGAGE COLLATERAL
 
     Substitution of Mortgage Collateral (the "Substitute Collateral") will be
permitted in the event of breaches of representations and warranties with
respect to any original Mortgage Collateral or in the event the documentation
with respect to any Mortgage Collateral is determined by the Bond Trustee to be
incomplete. The period during which such substitution will be permitted
generally will be indicated in the Prospectus Supplement for a Series of Bonds.
The Prospectus Supplement for a Series of Bonds will describe the conditions
upon which Mortgage Collateral may be substituted for Mortgage Collateral
initially securing such Series.
 
OPTIONAL PURCHASE OF DEFAULTED PLEDGED MORTGAGES
 
     If so provided in the related Prospectus Supplement, the Master Servicer
and/or the Company may, at its option, purchase from the Issuer any Pledged
Mortgage which is delinquent in payment by more than the number of days
specified in such Prospectus Supplement, at a price specified in such Prospectus
Supplement.
 
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<PAGE>   108
 
BOND AND DISTRIBUTION ACCOUNTS
 
     A separate Bond Account will be established with the Bond Trustee for each
Series of Bonds for receipt of (i) all interest and principal payments
(including, to the extent applicable, any required advances by the Master
Servicer and any Servicers) and all prepayments on the Mortgage Collateral
securing such Series required to be remitted to the Bond Trustee (including, to
the extent applicable, Insurance Proceeds required to be remitted to the Bond
Trustee and Liquidation Proceeds); (ii) the amount of cash, if any, withdrawn
from any related Reserve Fund; and (iii) if so specified in the related
Prospectus Supplement, the reinvestment income on all of the foregoing. On or
prior to the date specified in the related Prospectus Supplement (each, a
"Distribution Account Deposit Date"), the Master Servicer shall withdraw from
the Bond Account the Bond Distribution Amount for such Payment Date, to the
extent of funds available for such purpose on deposit therein, and will deposit
such amount in the Distribution Account.
 
     The Bond Trustee will invest the funds in the Bond Account and the
Distribution Account in Permitted Investments maturing no later than the next
Payment Date for the related Series of Bonds. (Indenture, Section 8.02(b))
"Permitted Investments" may include (i) obligations of the United States or any
agency thereof, provided such obligations are backed by the full faith and
credit of the United States; (ii) general obligations of or obligations
guaranteed by any state of the United States or the District of Columbia
receiving the highest long-term debt rating of each applicable Rating Agency,
(iii) commercial paper which is then receiving the highest commercial rating of
each applicable Rating Agency; (iv) certificates of deposit, demand or time
deposits, or bankers' acceptances issued by any depository institution or trust
company incorporated under the laws of the United States or of any state thereof
and subject to supervision and examination by federal and/or state banking
authorities, provided that the commercial paper and/or long term unsecured debt
obligations of such depository institution or trust company (or in the case of
the principal depository institution in a holding company system, the commercial
paper or long-term unsecured debt obligations of such holding company, but only
if Moody's Investors Service, Inc. ("Moody's") is not an applicable Rating
Agency) are then rated one of the two highest long-term and the highest
short-term ratings of each such Rating Agency for such securities; (v) demand or
time deposits or certificates of deposit issued by any bank or trust company or
savings institution to the extent such deposits are fully insured by the FDIC;
(vi) repurchase obligations with respect to any security described in clause (i)
above, in either case entered into with a depository institution or trust
company (acting as principal) described in clause (iv) above; (viii) securities
(other than stripped bonds, stripped coupons or instruments sold at a purchase
price in excess of 115% of the face amount thereof) bearing interest or sold at
a discount issued by any corporation incorporated under the laws of the United
States or any state thereof which, have the highest ratings of each applicable
Rating Agency (except if the Rating Agency is Moody's, such rating shall be the
highest commercial paper rating of Moody's for any such securities); (ix)
interests in any money market fund which invests only in other Permitted
Investments which at the date of acquisition of the interests in such fund and
throughout the time such interests are held in such fund has the highest
applicable rating by each applicable Rating Agency or such lower rating as will
not result in a change in the rating then assigned to each and (x) short term
investment funds sponsored by any trust company or national banking association
incorporated under the laws of the United States or any state thereof which are
rated by each applicable Rating Agency in their respective highest applicable
rating category and invest only in other Permitted Investments; provided that no
such instrument shall be a Permitted Investment if such instrument evidences the
right to receive interest only payments with respect to the obligations
underlying such instrument; and provided, further, that no investment specified
in clause (ix) or clause (x) above shall be a Permitted Investment for any
Pre-Funding Account or any related Capitalized Interest Account (as defined
herein). If a letter of credit is deposited with the Bond Trustee, such letter
of credit will be irrevocable, will name the Bond Trustee, in its capacity as
trustee for the Bondholders, as the sole beneficiary and will be issued by a
bank acceptable to each applicable Rating Agency. (Indenture, Section 1.01)
 
     Unless an Event of Default or an event which if not timely cured will
constitute an Event of Default with respect to a Series of Bonds has occurred
and is continuing, funds remaining in the related Bond Account following a
Payment Date for such Bonds (other than certain amounts not constituting
Available Funds if so
 
                                       48
<PAGE>   109
 
specified in the related Prospectus Supplement or any funds required to be
deposited in a related Reserve Fund) will be subject to withdrawal upon the
order of the Issuer free from the lien of the Indenture.
 
PRE-FUNDING ACCOUNT
 
     If so specified in the related Prospectus Supplement, the Master Servicer
will establish and maintain a Pre-Funding Account, in the name of the related
Bond Trustee on behalf of the related Bondholders, into which the Depositor will
deposit cash in an amount equal to the Pre-Funded Amount on the related Closing
Date. The Pre-Funding Account will be maintained with the Bond Trustee for the
related Series of Bond and is designed solely to hold funds to be applied by
such Bond Trustee during the Funding Period to pay to the Depositor the purchase
price for Subsequent Mortgage Collateral. Prior to inclusion in the Collateral
securing a Series of Bonds, in accordance with the provisions of the related
Indenture, the Subsequent Mortgage Collateral will be subject to review by the
same parties as reviewed the initial Mortgage Collateral. Specifically, the Bond
Trustee (or a custodian on its behalf) will be required to perform a document
review and an independent firm will certify the fair value of the Subsequent
Mortgage Collateral. In addition, the Issuer will be required to deliver to the
Bond Trustee a legal opinion to the effect that all Indenture requirements have
been met for including the Subsequent Mortgage Collateral in the Collateral.
 
     Monies on deposit in the Pre-Funding Account will not be available to cover
losses on or in respect of the related Mortgage Collateral. The Pre-Funded
Amount will not exceed 50% of the initial aggregate principal amount of the
Bonds of the related Series. The Pre-Funded Amount will be used by the related
Bond Trustee to purchase Subsequent Mortgage Collateral from the Depositor from
time to time during the Funding Period. The Funding Period, if any, for a Series
of Bonds will begin on the related Closing Date and will end on the date
specified in the related Prospectus Supplement, which in no event will be later
than the date that is one year after the related Closing Date. Monies on deposit
in the Pre-Funding Account may be invested in Permitted Investments (as such
term is defined above under "-- Bond and Distribution Accounts") under the
circumstances and in the manner described in the related Agreement. Earnings on
investment of funds in the Pre-Funding Account will be deposited into the
related Bond Account or such other trust account as is specified in the related
Prospectus Supplement and losses will be charged against the funds on deposit in
the Pre-Funding Account. Any amounts remaining in the Pre-Funding Account at the
end of the Funding Period will be paid to the related Bondholders in the manner
and priority specified in the related Prospectus Supplement, as a prepayment of
principal of the related Bonds. Certain information with respect to the
Subsequent Mortgage Collateral will be filed with the Commission on Form 8-K
within fifteen days after the date such Subsequent Mortgage Collateral is
conveyed to the related Trust.
 
     In addition, if so specified in the related Prospectus Supplement, on the
related Closing Date the Depositor will deposit in an account (the "Capitalized
Interest Account") cash in such amount as is necessary to cover shortfalls in
interest on the related Series of Bonds that may arise as a result of
utilization of the Pre-Funding Account as described above. The Capitalized
Interest Account shall be maintained with the Bond Trustee for the related
Series of Bonds and is designed solely to cover the above-mentioned interest
shortfalls. Monies on deposit in the Capitalized Interest Account will not be
available to cover losses on or in respect of the related Mortgage Collateral.
To the extent that the entire amount on deposit in the Capitalized Interest
Account has not been applied to cover shortfalls in interest on the related
Series of Bonds by the end of the Funding Period, any amounts remaining in the
Capitalized Interest Account will be paid to the Depositor.
 
                               CREDIT ENHANCEMENT
 
GENERAL
 
     Credit enhancement may be provided with respect to one or more Classes of a
Series of Bonds or with respect to the related Mortgage Collateral for the
purpose of (i) maintaining timely payments or providing additional protection
against losses on the Collateral securing such Series of Bonds, (ii) paying
administrative expenses or (iii) establishing a minimum reinvestment rate on the
payments made in respect of such Collateral or principal payment rate on such
Collateral. Credit enhancement may be in the form of the
 
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<PAGE>   110
 
subordination of one or more Classes of such Series, the establishment of one or
more Reserve Funds, use of a Mortgage Pool Insurance Policy, a Special Hazard
Insurance Policy, Bankruptcy Bond, cash account, insurance policy, surety bond,
guaranteed investment contract, cross-collateralization, overcollaterlization,
excess spread, reinvestment income, guaranty, letter of credit or derivative
arrangement as described herein and in the related Prospectus Supplement, or any
combination of the foregoing. Unless otherwise specified in the related
Prospectus Supplement, no credit enhancement will provide protection against all
risks of loss or guarantee repayment of the entire principal balance of the
Bonds and interest thereon. If losses occur which exceed the amount covered by
credit enhancement or which are not covered by the credit enhancement,
Bondholders will bear their allocable share of any deficiencies.
 
SUBORDINATION
 
     If so specified in the related Prospectus Supplement, a Series of Bonds may
consist of one or more Classes of Senior Bonds and one or more Classes of
Subordinated Bonds. The rights of the holders of the Subordinated Bonds of a
Series (the "Subordinated Bondholders") to receive payments of principal and/or
interest (or any combination thereof) will be subordinated to such rights of the
holders of the Senior Bonds of the same Series (the "Senior Bondholders") to the
extent described in the related Prospectus Supplement. This subordination is
intended to enhance the likelihood of regular receipt by the Senior Bondholders
of the full amount of their scheduled payments of principal and/or interest. The
protection afforded to the Senior Bondholders of a Series by means of the
subordination feature will be accomplished by (i) the preferential right of such
holders to receive, prior to any payment being made on the related Subordinated
Bonds, the amounts of principal and/or interest due them on each Payment Date
out of the funds available for payment on such date in the related Distribution
Account and, to the extent described in the related Prospectus Supplement, by
the right of such holders to receive future payments that would otherwise have
been payable to the Subordinated Bondholders; or (ii) as otherwise described in
the related Prospectus Supplement. If so specified in the related Prospectus
Supplement, subordination may apply only in the event of certain types of losses
not covered by other forms of credit support, such as hazard losses not covered
by standard hazard insurance policies or losses due to the bankruptcy or fraud
of the borrower. The related Prospectus Supplement will set forth information
concerning, among other things, the amount of subordination of a Class or
Classes of Subordinated Bonds in a Series, the circumstances in which such
subordination will be applicable and the manner, if any, in which the amount of
subordination will decrease over time.
 
     If so specified in the related Prospectus Supplement, delays in receipt of
scheduled payments on the Mortgage Collateral and losses with respect to the
Mortgage Collateral will be borne first by the various Classes of Subordinated
Bonds and thereafter by the various Classes of Senior Bonds, in each case under
the circumstances and subject to the limitations specified in such Prospectus
Supplement. The aggregate payments in respect of delinquent payments on the
Mortgage Collateral over the lives of the Bonds or at any time, the aggregate
losses in respect of Mortgage Collateral which must be borne by the Subordinated
Bonds by virtue of subordination and the amount of payments otherwise
distributable to the Subordinated Bondholders that will be distributable to
Senior Bondholders on any Payment Date may be limited as specified in the
related Prospectus Supplement. If aggregate payments in respect of delinquent
payments on the Mortgage Collateral or aggregate losses in respect of such
Mortgage Collateral were to exceed the amount specified in the related
Prospectus Supplement, Senior Bondholders would experience losses on the Bonds.
 
     If so specified in the related Prospectus Supplement, various Classes of
Senior Bonds and Subordinated Bonds may themselves be subordinate in their right
to receive certain payments to other Classes of Senior and Subordinated Bonds,
respectively.
 
     As between Classes of Senior Bonds and as between Classes of Subordinated
Bonds, payments may be allocated among such Classes (i) in accordance with a
schedule or formula, (ii) in relation to the occurrence of events or (iii)
otherwise, in each case as specified in the related Prospectus Supplement. As
between Classes of Subordinated Bonds, payments to Senior Bondholders on account
of delinquencies or losses and payments to the Reserve Fund will be allocated as
specified in the related Prospectus Supplement.
 
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<PAGE>   111
 
RESERVE FUNDS
 
     If so specified in the related Prospectus Supplement, the Issuer will
deposit in one or more accounts to be established with the Bond Trustee (each, a
"Reserve Fund") cash, certificates of deposit, letters of credit, surety bonds,
guaranteed investment contracts or any combination thereof, which may be used by
the Bond Trustee to make payments on such Series of Bonds to the extent funds
are not otherwise available. Reserve Funds will be established if they are
deemed by the Issuer to be required to assure timely payment of principal of,
and interest on, its Series of Bonds or are otherwise required as a condition to
the rating of such Bonds by any Rating Agency, or if the Issuer chooses to
reduce the likelihood of a special redemption of such Bonds. The Bond Trustee
will invest any cash in any Reserve Fund in Permitted Investments maturing no
later than the dates specified in the related Prospectus Supplement. If a letter
of credit is deposited with the Bond Trustee, such letter of credit will be
irrevocable, will name the Bond Trustee, in its capacity as trustee for the
Bondholders, as the sole beneficiary and will be issued by a bank acceptable to
each Rating Agency. If a surety bond is deposited with the Bond Trustee, such
surety bond will represent an obligation of an insurance company or other
corporation whose credit standing is acceptable to each Rating Agency and will
provide that the Bond Trustee may exercise all of the rights of the Issuer under
such surety bond without the necessity of the taking of any action by the
Issuer. Following each Payment Date for such Series of Bonds, amounts may be
withdrawn from the related Reserve Funds and remitted to the Issuer free from
the lien of the Indenture under the conditions and to the extent specified in
the related Prospectus Supplement. Additional information concerning any Reserve
Fund securing a Series of Bonds, including without limitation the manner in
which such Reserve Fund shall be funded and the conditions under which the
amounts on deposit therein will be used to make payments to holders of Bonds of
a particular Class of the related Series will be set forth in the related
Prospectus Supplement.
 
MORTGAGE POOL INSURANCE POLICIES
 
     If so specified in the related Prospectus Supplement, a separate mortgage
pool insurance policy or policies ("Mortgage Pool Insurance Policy") may be
obtained for a Series of Bonds secured by Pledged Mortgages and issued by the
insurer (the "Pool Insurer") named in such Prospectus Supplement. Each Mortgage
Pool Insurance Policy will, subject to the limitations described below, cover
loss by reason of default in payment on the related Pledged Mortgages in an
amount equal to a percentage specified in such Prospectus Supplement of the
aggregate principal balance of such Pledged Mortgages on the Cut-off Date which
are not covered as to their entire outstanding principal balances by Primary
Mortgage Insurance Policies. As more fully described below, the Master Servicer
will present claims thereunder to the Pool Insurer on behalf of itself, the Bond
Trustee and the Bondholders. The Mortgage Pool Insurance Policies, however, are
not blanket policies against loss, since claims thereunder may be made only
respecting particular defaulted Pledged Mortgages and only upon satisfaction of
certain conditions precedent described below. Unless otherwise specified in the
related Prospectus Supplement, the Mortgage Pool Insurance Policies will not
cover losses due to a failure to pay or denial of a claim under a Primary
Mortgage Insurance Policy.
 
     Unless otherwise specified in the related Prospectus Supplement, each
Mortgage Pool Insurance Policy will provide that no claims may be validly
presented unless (i) any required Primary Mortgage Insurance Policy is in effect
for the defaulted Pledged Mortgage and a claim thereunder has been submitted and
settled; (ii) hazard insurance on the related Mortgaged Property has been kept
in force and real estate taxes and other protection and preservation expenses
have been paid; (iii) if there has been physical loss or damage to the Mortgaged
Property, it has been restored to its physical condition (reasonable wear and
tear excepted) at the time of issuance of the policy; and (iv) the insured has
acquired good and merchantable title to the Mortgaged Property free and clear of
liens except certain permitted encumbrances. Upon satisfaction of these
conditions, the Pool Insurer will have the option either (a) to purchase the
Mortgaged Property at a price equal to the principal balance of the related
Pledged Mortgage plus accrued and unpaid interest at the Mortgage Rate to the
date of such purchase and certain expenses incurred by the Master Servicer on
behalf of the Bond Trustee and Bondholders or (b) to pay the amount by which the
sum of the principal balance of the defaulted Pledged Mortgage plus accrued and
unpaid interest at the Mortgage Rate to the date of payment of the claim and the
aforementioned expenses exceeds the proceeds received from an approved sale of
the Mortgaged Property, in
 
                                       51
<PAGE>   112
 
either case net of certain amounts paid or assumed to have been paid under the
related Primary Mortgage Insurance Policy. If any Mortgaged Property is damaged,
and proceeds, if any, from the related standard hazard insurance policy or the
applicable Special Hazard Insurance Policy are insufficient to restore the
damaged property to a condition sufficient to permit recovery under the Mortgage
Pool Insurance Policy, the Master Servicer will not be required to expend its
own funds to restore the damaged property unless it determines that (i) such
restoration will increase the proceeds to Bondholders on liquidation of the
Pledged Mortgage after reimbursement of the Master Servicer for its expenses and
(ii) such expenses will be recoverable by it through proceeds of the sale of the
Mortgaged Property or proceeds of the related Mortgage Pool Insurance Policy or
any related Primary Mortgage Insurance Policy.
 
     Unless otherwise specified in the related Prospectus Supplement, no
Mortgage Pool Insurance Policy will insure (and many Primary Mortgage Insurance
Policies do not insure) against loss sustained by reason of a default arising
from, among other things, (i) fraud or negligence in the origination or
servicing of a Pledged Mortgage, including misrepresentation by the Mortgagor,
the originator or persons involved in the origination thereof, or (ii) failure
to construct a Mortgaged Property in accordance with plans and specifications. A
failure of coverage attributable to one of the foregoing events might result in
a breach of the related Seller's representations described above and, in such
event, might give rise to an obligation on the part of such Seller to repurchase
the defaulted Pledged Mortgage if the breach cannot be cured by such Seller. No
Mortgage Pool Insurance Policy will cover (and many Primary Mortgage Insurance
Policies do not cover) a claim in respect of a defaulted Pledged Mortgage
occurring when the servicer of such Pledged Mortgage, at the time of default or
thereafter, was not approved by the applicable insurer.
 
     Unless otherwise specified in the related Prospectus Supplement, the
original amount of coverage under each Mortgage Pool Insurance Policy will be
reduced over the life of the related Bonds by the aggregate dollar amount of
claims paid less the aggregate of the net amounts realized by the Pool Insurer
upon disposition of all foreclosed properties. The amount of claims paid will
include certain expenses incurred by the Master Servicer as well as accrued
interest on delinquent Pledged Mortgages to the date of payment of the claim,
unless otherwise specified in the related Prospectus Supplement. Accordingly, if
aggregate net claims paid under any Mortgage Pool Insurance Policy reach the
original policy limit, coverage under that Mortgage Pool Insurance Policy will
be exhausted and any further losses will be borne by the Bondholders.
 
SPECIAL HAZARD INSURANCE POLICIES
 
     If so specified in the related Prospectus Supplement, a separate Special
Hazard Insurance Policy may be obtained for a Series of Bonds secured by Pledged
Mortgages and will be issued by the insurer (the "Special Hazard Insurer") named
in such Prospectus Supplement. Each Special Hazard Insurance Policy will,
subject to limitations described below, protect holders of the related Bonds
from (i) loss by reason of damage to Mortgaged Properties caused by certain
hazards (including earthquakes and, to a limited extent, tidal waves and related
water damage or as otherwise specified in the related Prospectus Supplement) not
insured against under the standard form of hazard insurance policy for the
respective states in which the Mortgaged Properties are located or under a flood
insurance policy (unless the Mortgaged Property is located in a federally
designated flood area) and (ii) loss caused by reason of the application of the
coinsurance clause contained in standard hazard insurance policies. No Special
Hazard Insurance Policy will cover losses occasioned by fraud or conversion by
the Bond Trustee or Master Servicer, war, insurrection, civil war, certain
governmental action, errors in design, faulty workmanship or materials (except
under certain circumstances), nuclear or chemical reaction, flood (if the
Mortgaged Property is located in a federally designated flood area), nuclear or
chemical contamination and certain other risks. The amount of coverage under any
Special Hazard Insurance Policy will be specified in the related Prospectus
Supplement. Each Special Hazard Insurance Policy will provide that no claim may
be paid unless hazard and, if applicable, flood insurance on the property
securing the Pledged Mortgage have been kept in force and other protection and
preservation expenses have been paid.
 
     Subject to the foregoing limitations, and unless otherwise specified in the
related Prospectus Supplement, each Special Hazard Insurance Policy will provide
that where there has been damage to property securing a foreclosed Pledged
Mortgage (title to which has been acquired by the insured) and to the extent
such damage is not covered by the standard hazard insurance policy or flood
insurance policy, if any, maintained by the
 
                                       52
<PAGE>   113
 
mortgagor or the Master Servicer, the Special Hazard Insurer will pay the lesser
of (i) the cost of repair or replacement of such property or (ii) upon transfer
of the property to the Special Hazard Insurer, the unpaid principal balance of
such Pledged Mortgage at the time of acquisition of such property by foreclosure
or deed in lieu of foreclosure, plus accrued interest to the date of claim
settlement and certain expenses incurred by the Master Servicer with respect to
such property. If the unpaid principal balance of a Pledged Mortgage plus
accrued interest and certain expenses is paid by the Special Hazard Insurer, the
amount of further coverage under the related Special Hazard Insurance Policy
will be reduced by such amount less any net proceeds from the sale of the
property. Any amount paid as the cost of repair of such property will further
reduce coverage by such amount. So long as a Mortgage Pool Insurance Policy
remains in effect, the payment by the Special Hazard Insurer of the cost of
repair or of the unpaid principal balance of the related Pledged Mortgage plus
accrued interest and certain expenses will not affect the total insurance
proceeds paid to Bondholders, but will affect the relative amounts of coverage
remaining under the related Special Hazard Insurance Policy and Mortgage Pool
Insurance Policy.
 
     To the extent specified in the related Prospectus Supplement, the Master
Servicer may deposit cash, an irrevocable letter of credit or a guaranteed
investment contract in a special trust account to provide protection in lieu of
or in addition to that provided by a Special Hazard Insurance Policy. The amount
of any Special Hazard Insurance Policy or of the deposit to the special trust
account in lieu thereof relating to such Bonds may be reduced so long as any
such reduction will not result in a downgrading of the rating of such Bonds by
any applicable Rating Agency.
 
BANKRUPTCY BONDS
 
     If so specified in the related Prospectus Supplement, a bankruptcy bond or
bonds (the "Bankruptcy Bond") may be obtained for a Series of Bonds secured by
Pledged Mortgages to cover losses resulting from proceedings under the federal
Bankruptcy Code with respect to a Pledged Mortgage will be issued by an insurer
named in such Prospectus Supplement. Each Bankruptcy Bond will cover, to the
extent specified in the related Prospectus Supplement, certain losses resulting
from a reduction by a bankruptcy court of scheduled payments of principal and
interest on a Pledged Mortgage or a reduction by such court of the principal
amount of a Pledged Mortgage and will cover certain unpaid interest on the
amount of such a principal reduction from the date of the filing of a bankruptcy
petition. The required amount of coverage under each Bankruptcy Bond will be set
forth in the related Prospectus Supplement. Coverage under a Bankruptcy Bond may
be cancelled or reduced by the Master Servicer if such cancellation or reduction
would not adversely affect the then current rating or ratings of the related
Bonds. See "CERTAIN LEGAL ASPECTS OF THE PLEDGED MORTGAGES -- Anti-Deficiency
Legislation and Other Limitations on Lenders" herein.
 
     To the extent specified in the related Prospectus Supplement, the Master
Servicer may deposit cash, an irrevocable letter of credit or a guaranteed
investment contract in a special trust account to provide protection in lieu of
or in addition to that provided by a Bankruptcy Bond. The amount of any
Bankruptcy Bond or of the deposit to the special trust account in lieu thereof
relating to such Bonds may be reduced so long as any such reduction will not
result in a downgrading of the then current rating of such Bonds by any such
Rating Agency.
 
BOND INSURANCE POLICIES, SURETY BONDS AND GUARANTEES
 
     If specified in the related Prospectus Supplement, deficiencies in amounts
otherwise payable on Bonds of a Series or certain Classes thereof will be
covered by insurance policies and/or surety bonds provided by one or more
insurance companies or sureties. Such instruments may cover, with respect to one
or more Classes of Bonds of the related Series, timely payments of interest
and/or full payments of principal on the basis of a schedule of principal
payments set forth in or determined in the manner specified in the related
Prospectus Supplement. In addition, if specified in the related Prospectus
Supplement, a Series of Bonds may also be covered by insurance or guarantees for
the purpose of (i) maintaining timely payments or providing additional
protection against losses on the Mortgage Collateral pledged to secure such
Series, (ii) paying administrative expenses or (iii) establishing a minimum
reinvestment rate on the payments made in respect of such Mortgage Collateral or
principal payment rate on such Mortgage Collateral. Such arrangements may
include
 
                                       53
<PAGE>   114
 
agreements under which Bondholders are entitled to receive amounts deposited in
various accounts held by the Bond Trustee upon the terms specified in such
Prospectus Supplement. A copy of any such instrument for a Series will be filed
with the Commission as an exhibit to a Current Report on Form 8-K to be filed
within 15 days of issuance of the Bonds of the related Series.
 
LETTER OF CREDIT
 
     If so specified in the related Prospectus Supplement, credit enhancement
may be provided by a letter of credit. The letter of credit, if any, with
respect to a Series of Bonds will be issued by the bank or financial institution
specified in the related Prospectus Supplement (the "L/C Bank"). Under the
letter of credit, the L/C Bank will be obligated to honor drawings thereunder in
an aggregate fixed dollar amount, net of unreimbursed payments thereunder, equal
to the percentage specified in the related Prospectus Supplement of the
aggregate principal balance of the Mortgage Collateral pledged to secure the
related Series of Bonds on the related Cut-off Date or of one or more Classes of
Bonds (the "L/C Percentage"). If so specified in the related Prospectus
Supplement, the letter of credit may permit drawings in the event of losses not
covered by insurance policies or other credit support, such as losses arising
from damage not covered by standard hazard insurance policies, losses resulting
from the bankruptcy of a borrower and the application of certain provisions of
the federal Bankruptcy Code, or losses resulting from denial of insurance
coverage due to misrepresentations in connection with the origination of a
Pledged Mortgage. The amount available under the letter of credit will, in all
cases, be reduced to the extent of the unreimbursed payments thereunder. The
obligations of the L/C Bank under the letter of credit for each Series of Bonds
will expire at the date specified in the related Prospectus Supplement. A copy
of the letter of credit for a Series, if any, will be filed with the Commission
as an exhibit to a Current Report on Form 8-K to be filed within 15 days of
issuance of the Securities of the related Series.
 
CROSS-COLLATERALIZATION
 
     If so specified in the related Prospectus Supplement, separate groups of
Mortgage Collateral may be pledged to secure separate Classes of the related
Series of Bonds. In such case, credit support may be provided by a
cross-collateralization feature which requires that payments be made with
respect to Bonds secured by one or more groups of Mortgage Collateral prior to
distributions to Subordinated Bonds secured by one or more other groups of
Mortgage Collateral. Cross-collateralization may be provided by (i) the
allocation of certain excess amounts generated by one or more groups of Mortgage
Collateral to one or more other groups of Mortgage Collateral or (ii) the
allocation of losses with respect to one or more groups of Mortgage Collateral,
to one or more other groups of Mortgage Collateral. Such excess amounts will be
applied and/or such losses will be allocated to the Class or Classes of
Subordinated Bonds of the related Series then outstanding having the lowest
rating assigned by any applicable Rating Agency or the lowest payment priority,
in each case to the extent and in the manner more specifically described in the
related Prospectus Supplement. The Prospectus Supplement for a Series which
includes a cross-collateralization feature will describe the manner and
conditions for applying such cross-collateralization feature.
 
OVERCOLLATERALIZATION
 
     If so specified in the related Prospectus Supplement, credit enhancement
may consist of over-collateralization whereby the aggregate principal balance of
the related Mortgage Collateral exceeds the aggregate principal balance of the
Bonds of the related Series. Such over-collateralization may exist on the
related Closing Date and/or develop thereafter as a result of the application of
a portion of the interest payments on each Pledged Mortgage or Certificate, as
the case may be, as an additional payment in respect of principal to reduce the
principal balance of a certain Class or Classes of Bonds and, thus, accelerate
the rate of payment of principal on such Class or Classes of Bonds.
 
EXCESS SPREAD
 
     "Excess Spread" refers to the positive spread that may exist to the extent
specified in the related Prospectus Supplement between the weighted average of
the interest rates (less servicing or other applicable
 
                                       54
<PAGE>   115
 
fees) on the Mortgage Collateral and the weighted average of the Bond Interest
Rates. Whether at any time any such positive spread exists will depend on a
variety of factors, including, with respect to a Series of Bonds with respect to
which both the Bonds and the Mortgage Collateral bear interest at adjustable
rates, the relationship of the movements in the indices applicable to the
Mortgage Collateral and those applicable to the Bonds, over which no prediction
can be made or assurance given.
 
     If so specified in the related Prospectus Supplement, the coverage provided
by one or more of the forms of credit enhancement described in this Prospectus
may apply concurrently to two or more separate Series of Bonds. If applicable,
the related Prospectus Supplement will identify the Series of Bonds to which
such credit enhancement relates and the manner of determining the amount of
coverage provided to such Series of Bonds thereby and of the application of such
coverage to the identified Series of Bonds.
 
MINIMUM PRINCIPAL PAYMENT AGREEMENT
 
     If so specified in the related Prospectus Supplement, an Issuer may enter
into an agreement with an institution pursuant to which such institution will
provide such funds as may be necessary to enable such Issuer to make principal
payments on the Bonds of the related Series at a minimum rate set forth in such
Prospectus Supplement.
 
DERIVATIVE ARRANGEMENTS
 
     If so specified in the related Prospectus Supplement, credit enhancement
may be provided with respect to one or more Classes of Bonds of a Series or with
respect to the Mortgage Collateral securing a Series of Bonds in the form of one
or more derivative arrangements. A derivative arrangement is a contract or
agreement, the price of which is directly dependent upon (i.e., "derived from")
the value of one or more underlying assets, including securities, equity
indices, debt instruments, commodities, other derivative instruments, or any
agreed upon pricing index or arrangement (e.g., the movement over time of the
Consumer Price Index or interest rates). Derivatives involve rights or
obligations based on the underlying asset, but do not necessarily result in a
transfer of the underlying asset. Derivative arrangements include swap
agreements, interest rate swaps, interest rate caps, interest rate floors,
interest rate collars and currency swap agreements. A "swap agreement" is a
contractual agreement providing for a series of exchanges of principal and/or
interest in the same or different currencies. At a more general level, the term
"swap agreement" includes the exchange of fixed-for-floating payments on a given
quantity of a specified commodity, security or other asset. An "interest rate
swap" is a swap agreement between two parties to engage in a series of exchanges
of interest payments on the same notional principal amount denominated in the
same currency based, respectively, on variable and fixed rates of interest. An
"interest rate cap" is an agreement providing for multi-period cash settled
options on interest rates. The cap purchaser receives a cash payment whenever
the reference rate exceeds the ceiling rate on a fixing date. An "interest rate
floor" is an agreement providing for a multi-period interest rate option that
provides a cash payment to the holder of the option whenever the reference rate
is below the floor on a fixing date. An "interest rate collar" is an agreement
providing for a combination of an interest rate cap and an interest rate floor
such that a cap is purchased and a floor is sold or vice versa. The effect of an
interest rate collar is to place upper and lower bounds on the cost of funds. A
"currency swap agreement" is a swap agreement between two parties for the
exchange of a future series of interest and principal payments in which one
party pays in one currency and the other party pays in a different currency. The
exchange rate is fixed over the life of the currency swap agreement.
 
     The derivative arrangements described above will support the payments on
the Bonds to the extent and under the conditions specified in the related
Prospectus Supplement. Unless otherwise specified in the related Prospectus
Supplement, no credit enhancement will provide protection against all risks of
loss or guarantee repayment of the entire principal balance of the Bonds and
interest thereon. If losses occur which exceed the amount covered by credit
enhancement or which are not covered by the credit enhancement, Bondholders will
bear their allocable share of any deficiencies.
 
                                       55
<PAGE>   116
 
                       SERVICING OF THE PLEDGED MORTGAGES
 
GENERAL
 
     The Master Servicer of the Pledged Mortgages, if any, securing a Series of
Bonds will be responsible for supervising and administering the servicing of
such Pledged Mortgages in accordance with the terms set forth in a master
servicing agreement (the "Master Servicing Agreement") among the Issuer, the
Master Servicer and the Bond Trustee. The Master Servicer with respect to a
Series of Bonds will be identified in the related Prospectus Supplement. Under
the Master Servicing Agreement, the Master Servicer will enforce the servicing
obligations of one or more servicers (each, a "Servicer") pursuant to one or
more mortgage servicing agreements (each, a "Servicing Agreement").
 
     No Servicing Agreement will contain any terms inconsistent with the related
Master Servicing Agreement. While each Servicing Agreement will typically be a
contract solely between Redwood Trust and the Servicer, Redwood Trust will
assign all of its rights under each Servicing Agreement to the Depositor under
the related Mortgage Loan Purchase Agreement and such rights will be assigned to
the Issuer and ultimately to the Bond Trustee pursuant to the Indenture. The
Master Servicing Agreement relating to a Series of Bonds will provide that the
Master Servicer and, if for any reason such Master Servicer is no longer the
Master Servicer of the related Pledged Mortgages, the Bond Trustee or any
successor Master Servicer must recognize the Servicer's rights and obligations
under such Servicing Agreement. As an independent contractor, each Servicer will
perform servicing functions for the Pledged Mortgages including collection and
remittance of principal and interest payments, administration of mortgage escrow
accounts, collection of certain insurance claims and, if necessary, foreclosure.
 
     The Master Servicer may permit Servicers to contract with subservicers to
perform some or all of the Servicer's servicing duties, but the Servicer will
not thereby be released from its obligations under the related Servicing
Agreement. When used herein with respect to servicing obligations, the term
Servicer includes any such subservicer. The Master Servicer may perform certain
supervisory functions with respect to servicing by the Servicers directly or
through an agent or independent contractor.
 
     On or before the related Closing Date, the Master Servicer will establish
the Bond Account into which each Servicer will remit collections on the Pledged
Mortgages serviced by it (net of its related servicing compensation, amounts
retained to pay certain insurance premiums and amounts retained by such Servicer
as reimbursement for certain advances it has made). The Master Servicer will
have the right under the Master Servicing Agreement to remove the Servicer
servicing any Pledged Mortgages in the event such Servicer defaults under its
Servicing Agreement and will exercise that right (subject to the consent of any
applicable Bond Insurer). if the Master Servicer considers such removal to be in
the best interest of the Bondholders or at the direction of one applicable Bond
Insurer. In the event that the Master Servicer removes a Servicer, the Master
Servicer will continue to be responsible for servicing the related Pledged
Mortgages until a replacement servicer is appointed.
 
     A form of Master Servicing Agreement has been filed as an exhibit to the
Registration Statement of which this Prospectus forms a part and the definitive
form of Master Servicing Agreement for each issuance of Bonds will be filed on
Form 8-K following the applicable closing date. The Master Servicing Agreement
with respect to a Series of Bonds secured by Pledged Mortgages will be assigned
to the Bond Trustee as security for such Series. The following summaries
describe certain provisions of the form of Master Servicing Agreement. The
summaries are qualified in their entirety by reference to the applicable form of
Master Servicing Agreement. Where particular provisions or terms used in the
form of Master Servicing Agreement are referred to, the actual provisions
(including definitions of terms) are incorporated by reference as part of such
summaries.
 
PAYMENTS ON PLEDGED MORTGAGES
 
     Pursuant to the Master Servicing Agreement with respect to a Series of
Bonds, the Master Servicer will be required to establish and maintain the Bond
Account as a separate Eligible Account or Eligible Accounts into which it will
deposit or cause to be deposited on a daily basis, or such other basis as may be
specified in
 
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<PAGE>   117
 
the related Prospectus Supplement, payments of principal and interest (net of
servicing compensation, amounts retained to pay certain insurance premiums,
amounts retained by the Master Servicer or any Servicer as reimbursement for
certain advances it has made and any other amounts specified in the related
Prospectus Supplement) received with respect to the related Pledged Mortgages.
Such amounts will include principal prepayments, certain Insurance Proceeds and
Liquidation Proceeds and amounts paid by the Servicer or the Company in
connection with any optional purchase by the Servicer or the Company of any
defaulted Pledged Mortgages.
 
     An "Eligible Account" is a segregated account either (i) maintained with a
depository institution the short-term debt obligations of which (or in the case
of a depository institution that is the principal subsidiary of a holding
company, the short-term debt obligations of such holding company, but only if
Moody's is not an applicable Rating Agency) are rated in the highest short-term
rating category by each applicable Rating Agency, and the long-term unsecured
debt obligations of which shall be rated one of the two highest long-term
ratings by each applicable Rating Agency (ii) an account or accounts the
deposits in which are fully insured by either the BIF or SAIF, (iii) a
segregated trust account or accounts maintained with the trust department of a
federal or a state chartered depository institution or trust company, acting in
a fiduciary capacity or (iv) an account or accounts otherwise acceptable to each
applicable Rating Agency and any applicable Bond Insurer. The collateral
eligible to secure amounts in the Bond Account is limited to Permitted
Investments. A Bond Account may be maintained as an interest bearing account or
the funds held therein may be invested pending each succeeding Payment Date in
Permitted Investments. If so specified in the related Prospectus Supplement, the
Master Servicer or its designee will be entitled to receive any such interest or
other income earned on funds in the Bond Account as additional compensation and
will be obligated to deposit in the Bond Account the amount of any loss
immediately as realized.
 
     Pursuant to the Master Servicing Agreement, the Master Servicer will be
required to remit to the Bond Trustee (to the extent not previously remitted),
on or before each Distribution Account Deposit Date, the Bond Distribution
Amount for the related Payment Date for deposit in the Distribution Account for
such Series of Bonds maintained with the Bond Trustee.
 
     Any amounts received by the Master Servicer as Insurance Proceeds or as
Liquidation Proceeds, net of any expenses and other amounts reimbursable to the
Master Servicer pursuant to the Master Servicing Agreement, will (unless applied
to the repair or restoration of a Mortgaged Property) be deemed to be payments
received with respect to the Pledged Mortgages securing the related Series of
Bonds and will be deposited in the related Bond Account.
 
     Prior to each Payment Date for a Series of Bonds, the Master Servicer will
furnish to the Bond Trustee and any applicable Bond Insurer a statement setting
forth certain information with respect to payments received with respect to the
Pledged Mortgages.
 
COLLECTION PROCEDURES
 
     The Master Servicer or applicable Servicer will make reasonable efforts to
collect all payments called for under the Pledged Mortgages and will, consistent
with each Master Servicing Agreement, Servicing Agreement and any Mortgage Pool
Insurance Policy, Primary Mortgage Insurance Policy and Bankruptcy Bond or
alternative arrangements, follow such collection procedures as are customary
with respect to mortgage loans that are comparable to the Pledged Mortgages.
Consistent with the above, the Master Servicer or applicable Servicer may, in
its discretion, (i) waive any assumption fee, late payment or other charge in
connection with a Pledged Mortgage and (ii) to the extent not inconsistent with
the coverage of such Pledged Mortgage by a Mortgage Pool Insurance Pool Policy,
Primary Mortgage Insurance Policy or Bankruptcy Bond or alternative
arrangements, if applicable, arrange with a Mortgagor a schedule for the
liquidation of delinquencies running for no more than 180 days (unless a longer
period is specified in the related Prospectus Supplement) after the applicable
due date for each payment. To the extent the Master Servicer or Servicer is
obligated to make or to cause to be made advances, such obligation will remain
during any period of such an arrangement.
 
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<PAGE>   118
 
     Unless otherwise specified in the related Prospectus Supplement, in any
case in which property securing a Pledged Mortgage has been, or is about to be,
conveyed by the Mortgagor, the Master Servicer or applicable Servicer will, to
the extent it has knowledge of such conveyance or proposed conveyance, exercise
or cause to be exercised its rights to accelerate the maturity of such Pledged
Mortgage under any due-on-sale clause applicable thereto, but only if the
exercise of such rights is permitted by applicable law and will not impair or
threaten to impair any recovery under any related Primary Mortgage Insurance
Policy. If these conditions are not met or if the Master Servicer or applicable
Servicer reasonably believes it is unable under applicable law to enforce such
due-on-sale clause, the Master Servicer or applicable Servicer will enter into
or cause to be entered into an assumption and modification agreement with the
person to whom such property has been or is about to be conveyed, pursuant to
which such person becomes liable for repayment of the Pledged Mortgage and, to
the extent permitted by applicable law, the Mortgagor also remains liable
thereon. If a Mortgaged Property is sold or transferred, the Master Servicer
will be required promptly to notify the Bond Trustee and the respective issuers
of any hazard insurance policies, mortgagor bankruptcy insurance and mortgage
insurance policies to assure that all required endorsements to each insurance
policy are obtained and that coverage under each such policy will remain in
effect after the occurrence of such sale or transfer. Any fee collected by or on
behalf of the Master Servicer or applicable Servicer for entering into an
assumption agreement will be retained by or on behalf of the Master Servicer or
applicable Servicer as additional servicing compensation. See "CERTAIN LEGAL
ASPECTS OF PLEDGED MORTGAGES -- 'Due-on-Sale' Clauses" herein. In connection
with any such assumption, the terms of the related Pledged Mortgage may not be
changed.
 
     With respect to Cooperative Loans, any prospective purchaser will generally
have to obtain the approval of the board of directors of the relevant
Cooperative before purchasing the shares and acquiring rights under the related
proprietary lease or occupancy agreement. See "CERTAIN LEGAL ASPECTS OF PLEDGED
MORTGAGES" herein. This approval is usually based on the purchaser's income and
net worth and numerous other factors. Although the Cooperative's approval is
unlikely to be unreasonably withheld or delayed, the necessity of acquiring such
approval could limit the number of potential purchasers for those shares and
otherwise limit the ability to sell and realize the value of those shares.
 
     In general, a "tenant-stockholder" (as defined in Code Section 216(b)(2))
of a corporation that qualifies as a "cooperative housing corporation" within
the meaning of Code Section 216(b)(1) is allowed a deduction for amounts paid or
accrued within his taxable year to the corporation representing his
proportionate share of certain interest expenses and certain real estate taxes
allowable as a deduction under Code Section 216(a) to the corporation under Code
Sections 163 and 164. In order for a corporation to qualify under Code Section
216(b)(1) for its taxable year in which such items are allowable as a deduction
to the corporation, such Section requires, among other things, that at least 80%
of the gross income of the corporation be derived from its tenant-stockholders
(as defined in Code Section 216(b)(2)). By virtue of this requirement, the
status of a corporation for purposes of Code Section 216(b)(1) must be
determined on a year-to-year basis. Consequently, there can be no assurance that
Cooperatives relating to the Cooperative Loans will qualify under such Section
for any particular year. In the event that such a Cooperative fails to qualify
for one or more years, the value of the collateral securing any related
Cooperative Loans could be significantly impaired because no deduction would be
allowable to tenant-stockholders under Code Section 216(a) with respect to those
years. In view of the significance of the tax benefits accorded
tenant-stockholders of a corporation that qualifies under Code Section
216(b)(1), the likelihood that such a failure would be permitted to continue
over a period of years appears remote.
 
JUNIOR MORTGAGES
 
     In the case of single family loans secured by junior liens on the related
Mortgaged Properties, for the protection of the related Bond Trustee's interest
the Master Servicer or applicable Servicer will be required to file (or cause to
be filed) of record a request for notice of any action by a superior lienholder
under the Senior Lien, where permitted by local law and whenever applicable
state law does not require that a junior lienholder be named as a party
defendant in foreclosure proceedings in order to foreclose such junior
lienholder's equity of redemption. The Master Servicer or applicable Servicer
also will be required to notify any superior
 
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<PAGE>   119
 
lienholder in writing of the existence of the Pledged Mortgage and request
notification of any action (as described below) to be taken against the
Mortgagor or the Mortgaged Property by the superior lienholder. If the Master
Servicer or Servicer is notified that any superior lienholder has accelerated or
intends to accelerate the obligations secured by the related Senior Lien, or has
declared or intends to declare a default under the mortgage or the promissory
note secured thereby, or has filed or intends to file an election to have the
related Mortgaged Property sold or foreclosed, then the Master Servicer or
Servicer will be required to take, on behalf of the related Issuer, whatever
actions are necessary to protect the interests of the related Bondholders,
and/or to preserve the security of the related Pledged Mortgage. The Master
Servicer or applicable Servicer will generally be required to advance the
necessary funds to cure the default or reinstate the superior lien, if such
advance is in the best interests of the related Bondholders and the Master
Servicer or Servicer determines such advances are recoverable out of payments on
or proceeds of the related Pledged Mortgage.
 
SERVICING AND OTHER COMPENSATION AND PAYMENT OF EXPENSES
 
     The principal servicing compensation to be paid to the Master Servicer in
respect of its master servicing activities for each Series of Bonds will be
equal to the percentage per annum described in the related Prospectus Supplement
(which may vary under certain circumstances) of the outstanding principal
balance of each Pledged Mortgage securing such Series of Bonds or such other
amounts as may be described in the Prospectus Supplement and such compensation
will be retained by it from collections of interest on such Pledged Mortgage or
other sources described in the Prospectus Supplement (the "Master Servicing
Fee"). As compensation for its servicing duties, any Servicer or subservicer
will generally be entitled to a monthly servicing fee as described in the
related Prospectus Supplement. In addition, the Master Servicer, any Servicer or
any subservicer will retain as additional compensation all prepayment charges,
assumption fees and late payment charges, to the extent collected from
Mortgagors, and any benefit that may accrue as a result of the investment of
funds in the applicable Bond Account (unless otherwise specified in the related
Prospectus Supplement).
 
     The Master Servicer will pay or cause to be paid certain ongoing expenses
associated with each Series of Bonds and incurred by it in connection with its
responsibilities under the related Master Servicing Agreement, including,
without limitation, payment of any fee or other amount payable in respect of any
credit enhancement arrangements, payment of the fees and disbursements of the
Bond Trustee, any custodian appointed by the Bond Trustee, the certificate
registrar and any paying agent, and payment of expenses incurred in enforcing
the obligations of Servicers and Sellers. The Master Servicer or applicable
Servicer will be entitled to reimbursement of expenses incurred in enforcing the
obligations of Servicers under certain limited circumstances. In addition, as
indicated in the preceding section, the Master Servicer will be entitled to
reimbursement of expenses incurred by it in connection with any defaulted
Pledged Mortgage as to which it has determined that all recoverable Liquidation
Proceeds and Insurance Proceeds have been received (a "Liquidated Mortgage"),
and in connection with the restoration of Mortgaged Properties, such right of
reimbursement being prior to the rights of Bondholders to receive any related
Liquidation Proceeds (including Insurance Proceeds).
 
PREPAYMENTS
 
     In general, when a borrower prepays a mortgage loan between due dates, the
borrower is required to pay interest on the amount prepaid only to the date of
prepayment and not thereafter. In the event such prepayments, together with
other prepayments (including for this purpose prepayments resulting from
refinancing or liquidations of the Pledged Mortgages or the mortgage loans
underlying the Certificates, as the case may be, due to defaults, casualties,
condemnations, repurchases by the Seller, the Issuer or Redwood Trust or
purchases thereof by the Master Servicer or the Company), result in a shortfall
in the amount of interest available on a Payment Date for the Bonds of a Series,
the Master Servicer or applicable Servicer may be required to cover the
shortfall, but only if and to the extent specified in the related Prospectus
Supplement.
 
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<PAGE>   120
 
EVIDENCE AS TO COMPLIANCE
 
     Each Master Servicing Agreement and Indenture will provide that on or
before a specified date in each year, a firm of independent public accountants
will furnish a statement to the Issuer, the Master Servicer, any applicable Bond
Insurer and the Bond Trustee to the effect that, on the basis of the examination
by such firm conducted substantially in compliance with the Uniform Single
Attestation Program for Mortgage Bankers, the Audit Program for Mortgages
serviced for FHLMC or such other procedures as may be specified in the related
Prospectus Supplement, the servicing by or on behalf of each Servicer of Pledged
Mortgages under agreements substantially similar to each other (including the
related Master Servicing Agreement) was conducted in compliance with such
agreements except for any significant exceptions or errors in records that, in
the opinion of the firm, the Audit Program for Mortgages serviced for FHLMC, the
Uniform Single Attestation Program for Mortgage Bankers or such other procedure,
requires it to report. In rendering its statement such firm may rely, as to
matters relating to the direct servicing of Pledged Mortgages by Subservicers,
upon comparable statements for examinations conducted substantially in
compliance with the Uniform Single Attestation Program for Mortgage Bankers, the
Audit Program for Mortgages serviced for FHLMC or such other procedure,
(rendered within one year of such statement) of firms of independent public
accountants with respect to the related Subservicer.
 
     Each Master Servicing Agreement and Indenture will also provide for
delivery to the Issuer, the Master Servicer, any applicable Bond Insurer and the
Bond Trustee, on or before a specified date in each year, of an annual statement
signed by two officers of the Master Servicer to the effect that the Master
Servicer has fulfilled its obligations under the Master Servicing Agreement
throughout the preceding year.
 
     Copies of the annual accountants' statement and the statement of officers
of the Master Servicer may be obtained by Bondholders of the related Series
without charge upon written request to the Issuer at its principal executive
offices.
 
ADVANCES AND OTHER AMOUNTS PAYABLE BY MASTER SERVICER AND SERVICERS
 
     Subject to any limitations set forth in the related Prospectus Supplement,
each Master Servicing Agreement will require the Master Servicer to advance on
or before each Payment Date (from its own funds, funds advanced by Servicers or
funds held in the Bond Account for future distribution to Bondholders), an
amount equal to the aggregate of payments of principal and interest that were
delinquent on the related Determination Date, subject to the Master Servicer's
determination that such advances will be recoverable out of late payments by
obligors on the Mortgage Collateral, Liquidation Proceeds, Insurance Proceeds or
otherwise. In the case of Cooperative Loans, the Master Servicer also will be
required to advance any unpaid maintenance fees and other charges under the
related proprietary leases as specified in the related Prospectus Supplement. To
the extent described in the related Prospectus Supplement, each Servicer may
have a comparable obligation to advance under its Servicing Agreement.
 
     In making Advances, the Master Servicer or applicable Servicer will
endeavor to maintain a regular flow of scheduled interest and principal payments
to Bondholders, rather than to guarantee or insure against losses. If Advances
are made by the Master Servicer from cash being held for future distribution to
Bondholders, the Master Servicer will replace such funds on or before any future
Payment Date to the extent that funds in the applicable Bond Account on such
Payment Date would be less than the amount required to be available for
distributions to Bondholders on such date. Any Advances will be reimbursable to
the Master Servicer or applicable Servicer out of recoveries on the specific
Mortgage Collateral with respect to which such Advances were made (e.g., late
payments made by the related obligors, any related Insurance Proceeds,
Liquidation Proceeds or proceeds of any Pledged Mortgage repurchased pursuant to
the related Servicing Agreement). In addition, Advances by the Master Servicer
(and any advances by a Servicer) also will be reimbursable to the Master
Servicer (or Servicer) from cash otherwise distributable to Bondholders to the
extent that the Master Servicer (or Servicer) determines that any such Advances
previously made are not ultimately recoverable as described in the immediately
preceding sentence. The Master Servicer or applicable Servicer also will be
obligated to make advances, to the extent recoverable out of Insurance Proceeds,
Liquidation Proceeds or otherwise, in respect of certain taxes and insurance
premiums not paid by Mortgagors on a timely basis. Funds
 
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<PAGE>   121
 
so advanced are reimbursable to the Master Servicer or Servicer to the extent
permitted by the Master Servicing Agreement or applicable Servicing Agreement.
If specified in the related Prospectus Supplement, the obligations of the Master
Servicer to make Advances may be supported by a cash advance reserve fund, a
surety bond or a letter of credit, in each case as described in such Prospectus
Supplement.
 
RESIGNATION OF MASTER SERVICER
 
     A Master Servicer may not resign from its obligations and duties under a
Master Servicing Agreement or assign or transfer such duties or obligations
except (i) upon a determination that its duties thereunder are no longer
permissible under applicable law or (ii) upon a sale of its servicing rights
with respect to the Pledged Mortgages with the prior written consents of the
Bond Trustee, the Issuer and any applicable Pool Insurer or Bond Insurer (a
"Bond Insurer"). No such resignation will become effective until the Bond
Trustee, as Stand-by Master Servicer, or a Successor Master Servicer (as such
terms are defined below) has assumed the Master Servicer's obligations and
duties under such Master Servicing Agreement.
 
     Each Master Servicing Agreement will provide that such a successor master
servicer (the "Successor Master Servicer") must be satisfactory to the Issuer,
the Bond Trustee and any applicable Pool Insurer or Bond Insurer, in the
exercise of their reasonable discretion and must be approved to act as a
mortgage servicer for FHLMC or FNMA.
 
STAND-BY SERVICER
 
     If so specified in the related Prospectus Supplement, the Bond Trustee will
act as stand-by Master Servicer (the "Stand-by Master Servicer") with respect to
each Series of Bonds secured by Pledged Mortgages. As Stand-by Master Servicer,
the Bond Trustee will succeed to the rights and obligations of the Master
Servicer with respect to the Pledged Mortgages securing such Series upon a
default by the Master Servicer or upon resignation by the Master Servicer until
the appointment of a Successor Master Servicer.
 
SPECIAL SERVICING AGREEMENT
 
     The Company may appoint (subject to the consent of any applicable Bond
Insurer) a Special Servicer to undertake certain responsibilities with respect
to certain defaulted Pledged Mortgages securing a Series. The Special Servicer
may engage various independent contractors to perform certain of its
responsibilities, provided, however, the Special Servicer remains fully
responsible and liable for all its requirements under the special servicing
agreement (the "Special Servicing Agreement"). As may be further specified in
the related Prospectus Supplement, the Special Servicer, if any, may be entitled
to various fees, including, but not limited to, (i) a monthly engagement fee
applicable to each Pledged Mortgage, (ii) a special servicing fee, or (iii) a
performance fee applicable to each liquidated Pledged Mortgage, in each case
calculated as set forth in the related Prospectus Supplement.
 
CERTAIN MATTERS REGARDING THE MASTER SERVICER AND THE COMPANY
 
     Unless otherwise specified in the related Prospectus Supplement, each
Master Servicing Agreement will provide that neither the Master Servicer, the
Company, the Owner Trustee nor any director, officer, employee or agent of the
Master Servicer, the Company or the Owner Trustee will be under any liability to
the related Bondholders for any action taken or for refraining from the taking
of any action in good faith pursuant to the Master Servicing Agreement, or for
errors in judgment; provided, however, that neither the Master Servicer, the
Company, the Owner Trustee nor any such person will be protected against any
liability that would otherwise be imposed by reason of willful misfeasance, bad
faith or gross negligence in the performance of duties thereunder or by reason
of reckless disregard of obligations and duties thereunder. Each Master
Servicing Agreement will further provide that the Master Servicer, the Company,
the Owner Trustee and any director, officer, employee or agent of the Master
Servicer, the Company or the Owner Trustee will be entitled to indemnification
by the related Issuer and will be held harmless against any loss, liability or
expense incurred in connection with any legal action relating to the Master
Servicing Agreement or the Bonds, other than any loss, liability or expense
related to any specific Mortgage Collateral (except any such loss, liability or
expense
 
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<PAGE>   122
 
otherwise reimbursable pursuant to the Master Servicing Agreement) and any loss,
liability or expense incurred by reason of willful misfeasance, bad faith or
negligence in the performance of duties thereunder or by reason of reckless
disregard of obligations and duties thereunder. In addition, each Master
Servicing Agreement will provide that neither the Master Servicer, the Company
nor the Owner Trustee will be under any obligation to appear in, prosecute or
defend any legal action which is not incidental to its respective
responsibilities under the Master Servicing Agreement and which in its opinion
may involve it in any expense or liability. The Master Servicer, the Company or
the Owner Trustee may, however, in its discretion undertake any such action
which it may deem necessary or desirable with respect to the Master Servicing
Agreement and the rights and duties of the parties thereto and the interests of
the Bondholders thereunder. In such event, unless otherwise specified in the
related Prospectus Supplement, the legal expenses and costs of such action and
any liability resulting therefrom will be expenses, costs and liabilities of the
related Issuer, and the Master Servicer, the Company or the Owner Trustee, as
the case may be, will be entitled to be reimbursed therefor out of funds
otherwise distributable to Bondholders.
 
     Any person into which the Master Servicer may be merged or consolidated, or
any person resulting from any merger or consolidation to which the Master
Servicer is a party, or any person succeeding to the business of the Master
Servicer, will be the successor of the Master Servicer under each Master
Servicing Agreement, provided that such person is qualified to sell mortgage
loans to, and service mortgage loans on behalf of, FNMA or FHLMC and further
provided that such merger, consolidation or succession does not adversely affect
the then current rating or ratings of the Bonds of such Series.
 
SERVICING DEFAULTS
 
     Events of default under the Master Servicing Agreement (each, a "Servicing
Default") for a Series of Bonds will include (i) any failure of the Master
Servicer to deposit in the Bond Account or remit to the Bond Trustee any
required payment (other than an Advance) which continues unremedied for one
business day after the giving of written notice of such failure to the Master
Servicer by the Bond Trustee or the Issuer; (ii) any failure by the Master
Servicer to make an Advance as required under the Master Servicing Agreement,
unless cured as specified therein; (iii) any failure by the Master Servicer duly
to observe or perform in any material respect any of its other covenants or
agreements in the Master Servicing Agreement or any related Bond Insurance
Policy which continues unremedied for thirty days after the giving of written
notice of such failure to the Master Servicer by the Bond Trustee or the Issuer;
and (iv) certain events of insolvency, readjustment of debt, marshalling of
assets and liabilities or similar proceeding and certain actions by or on behalf
of the Master Servicer indicating its insolvency, reorganization or inability to
pay its obligations.
 
RIGHTS UPON SERVICING DEFAULT
 
     If a Servicing Default under a Master Servicing Agreement shall have
occurred and be continuing, the Bond Trustee may, with the consent of any
applicable Bond Insurer, and shall, at the direction of any such Bond Insurer,
terminate all of the rights and obligations of the Master Servicer under such
Master Servicing Agreement, including the Master Servicer's rights to receive
any Master Servicing Fees. Upon such termination, the Bond Trustee, as Stand-by
Master Servicer, or any Successor Master Servicer duly appointed by the Bond
Trustee will succeed to all the responsibilities, duties and liabilities of the
Master Servicer under such Master Servicing Agreement and will be entitled to
similar compensation arrangements. Neither the Issuer nor the Bond Trustee shall
have any right to waive any Servicing Default, except under certain
circumstances specified in the Master Servicing Agreement, but any applicable
Bond Insurer may waive a Servicing Default.
 
AMENDMENT OF MASTER SERVICING AGREEMENT
 
     A Master Servicing Agreement with respect to any Series of Bonds secured by
Pledged Mortgages may not be amended, changed, modified, terminated or
discharged, except by an instrument in writing signed by all parties thereto,
with the prior written consent of any applicable Bond Insurer and with prior
written notice to any applicable Pool Insurer.
 
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<PAGE>   123
 
                                 THE INDENTURE
 
     The following is a general summary of certain provisions of the Indenture
for each Series of Bonds not described elsewhere in this Prospectus. The
summaries are qualified in their entirety by reference to the provisions of the
Indenture. Where particular provisions or terms used in the Indenture are
referred to, the actual provisions (including definitions of terms) are
incorporated by reference as part of such summaries. The Indenture relating to
each Series of Bonds will be filed with the Securities and Exchange Commission
within fifteen days of the closing of the sale of such Series of Bonds.
 
GENERAL
 
     Unless otherwise specified in the related Prospectus Supplement, the
Indenture for each Series of Bonds will limit the amount of Bonds that can be
issued thereunder and will provide that Bonds may be issued only up to the
aggregate principal amount authorized by the Issuer.
 
MODIFICATION OF INDENTURE
 
     With the consent of the holders of not less than 66 2/3% of the then
outstanding principal amount of the Class of Bonds of the related Series
specified in the related Prospectus Supplement to be the "Controlling Class" and
any applicable Bond Insurer, the Bond Trustee and the Issuer may execute a
supplemental indenture to add provisions to, or change in any manner or
eliminate any provisions of, the Indenture with respect to the Bonds of such
Series or modify (except as provided below) in any manner the rights of the
Bondholders.
 
     Without the consent of the holder of each outstanding Bond affected,
however, no supplemental indenture shall (a) change the Stated Maturity of the
principal of, or any installment of interest on, any Bond or reduce the
principal amount thereof, the interest rate specified thereon or the redemption
price with respect thereto, or change the earliest date on which any Bond may be
redeemed at the option of the Issuer, or any place of payment where, or the coin
or currency in which, any affected Bond or any interest thereon is payable, or
impair the right to institute suit for the enforcement of the provisions of the
Indenture regarding payment, (b) reduce the percentage of the aggregate amount
of the outstanding Bonds, the consent of the holders of which is required for
any such supplemental indenture, or the consent of the holders of which is
required for any waiver of compliance with certain provisions of the Indenture
or certain defaults thereunder and their consequences provided for in the
Indenture, (c) modify the provisions of the Indenture specifying the
circumstances under which such a supplemental indenture may not change the
provisions of the Indenture without the consent of each outstanding Bond
affected thereby, or the provisions of the Indenture with respect to certain
remedies available in an Event of Default (as defined herein), except to
increase any percentage specified therein or to provide that certain other
provisions of the Indenture cannot be modified or waived without the consent of
the holder of each outstanding Bond affected thereby, (d) modify or alter the
provisions of the Indenture defining when Bonds are outstanding, (e) permit the
creation of any lien (other than certain permitted liens) ranking prior to or on
a parity with the lien of the Indenture with respect to any part of the property
subject to lien under the Indenture, or terminate the lien of the Indenture on
any property at any time subject thereto or deprive the holder of any Bond of
the security afforded by the lien of the Indenture (other than in connection
with a permitted substitution of Mortgage Collateral) or (f) modify any of the
provisions of the Indenture in such manner as to affect the calculation of the
debt service requirement for any Bond or the rights of the Bondholders to the
benefits of any provisions for the mandatory redemption of Bonds contained
therein. (Indenture, Section 9.02)
 
     The Issuer and the Bond Trustee may also enter into supplemental indentures
(subject to the consent of any applicable Bond Insurer), without obtaining the
consent of Bondholders, to cure ambiguities or make minor corrections, and to do
such other things as would not adversely affect the interests of Bondholders.
(Indenture, Section 9.01)
 
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<PAGE>   124
 
EVENTS OF DEFAULT
 
     Unless otherwise specified in the related Prospectus Supplement, an event
of default (an "Event of Default") with respect to any Series of Bonds is
defined in the Indenture as being: (a) the failure (i) to pay any principal of,
or interest on, any Bond of such Series then due, (ii) if applicable, to call
for special redemption any Bonds that are required to be so redeemed or (iii) to
pay the redemption price of any Bonds called for redemption; (b) a default in
the observance of certain negative covenants in the Indenture; (c) a material
default in the observance of any other covenant of the Issuer (including
covenants in any applicable Bond Insurance Agreement, and the continuation of
any such default for a period of 60 days after notice thereof is given to the
Issuer by the Bond Trustee or any applicable Insurer or by the holders of more
than 50% in outstanding principal amount of the Controlling Class of Bonds of
such Series; (d) any representation or warranty made by the Issuer in the
Indenture (or any applicable Bond Insurance Agreement) or in any certificate
delivered pursuant thereto being incorrect in a material respect as of the time
made, and the circumstances in respect of which such representation or warranty
is incorrect are not cured within 60 days after notice thereof is given to the
Issuer by the Bond Trustee or applicable Bond Insurer or by the holders of more
than 50% in outstanding principal amount of the Controlling Class of Bonds of
such Series; or (e) certain events of bankruptcy, insolvency, receivership or
reorganization of the Issuer. Notwithstanding the foregoing, the failure of the
Issuer to pay when and as due any installment of principal of any Bond shall
generally not constitute an Event of Default under the related Indenture unless
the outstanding principal amount of the Bonds exceeds the principal amount of
the related Mortgage Collateral after giving effect to all distributions on the
related Payment Date or the Bonds are not otherwise paid in full by their
maturity date (Indenture, Section 5.01)
 
RIGHTS UPON EVENTS OF DEFAULT
 
     In case an Event of Default shall occur and be continuing with respect to a
Series of Bonds, any applicable Bond Insurer may, and the Bond Trustee or
holders of more than 50% in outstanding principal amount of the Controlling
Class of Bonds of such Series (subject to prior consent of any applicable Bond
Insurer) may, declare the principal of such Series of Bonds to be due and
payable. Such declaration may under certain circumstances be rescinded by the
holders of a majority in principal amount of the outstanding Bonds of such
Series (with the consent of the applicable Bond Insurer) or by the applicable
Bond Insurer. (Indenture, Section 5.02)
 
     Upon an Event of Default the Bond Trustee may, with the prior written
consent of any applicable Bond Insurer, and shall at the direction of any
applicable Bond Insurer, sell the Collateral for such Series, in which event the
Bonds of such Series will be payable pro rata, without regard to their Stated
Maturities, or in such other manner as is specified in the related Prospectus
Supplement, out of the collections on, or the proceeds from the sale of, such
Collateral and will, to the extent permitted by applicable law, bear interest at
the interest rate specified in the Indenture. (Indenture, Section 5.08) If so
specified in the related Prospectus Supplement, following an Event of Default,
if a Series of Bonds has been declared to be due and payable, the Bond Trustee
may (subject to prior consent of any applicable Bond Insurer), refrain from
selling the Collateral, including the Mortgage Collateral, for such Series and
continue to apply all amounts received on the Collateral to payments due on the
Bonds of such Series in accordance with their terms, notwithstanding the
acceleration of the maturity of such Bonds. (Indenture, Section 5.05)
 
     In case an Event of Default shall occur and be continuing, the Bond Trustee
shall be under no obligation to expend or risk its own funds or otherwise incur
any financial liability in the performance of its duties under the Indenture if
it has reasonable grounds for believing that it has not been assured of adequate
security or indemnity. (Indenture, Section 6.01(e)) Subject to such provisions
for indemnification and certain limitations contained in the Indenture any
applicable Bond Insurer or, the holders of a majority in principal amount
outstanding of the Controlling Class of outstanding Bonds of a Series (subject
to prior consent of any applicable Bond Insurer) shall have the right to direct
the time, method and place of conducting any proceeding for any remedy available
to the Bond Trustee or exercising any trust or power conferred on the Bond
Trustee with respect to the Bonds of such Series; and any applicable Bond
Insurer or the holders of a majority in principal amount of the Controlling
Class of Bonds of a Series then outstanding (subject to prior consent of any
applicable Bond Insurer) may, in certain cases, waive any default with respect
thereto, except a
 
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<PAGE>   125
 
default in a covenant or provision of the Indenture that cannot be modified
without the consent of each holder of Bonds affected. (Indenture, Sections 5.14
and 5.15)
 
     No holder of Bonds will have the right to institute any proceeding with
respect to the Indenture, unless (a) such holder previously has given to the
Bond Trustee any applicable Bond Insurer or written notice of an Event of
Default, (b) the holders of more than 50% in outstanding principal amount of the
Controlling Class of Bonds of the Series have made written request upon the Bond
Trustee to institute such proceedings in its own name as Bond Trustee and have
offered the Bond Trustee indemnity in full, (c) the Bond Trustee has for 60 days
neglected or refused to institute any such proceeding (d) no direction
inconsistent with such written request has been given to the Bond Trustee during
such 60-day period by the holders of a majority in principal amount of the
outstanding Bonds of such Series and (e) any applicable Bond Insurer has given
its prior written consent. (Indenture, Section 5.09)
 
CERTAIN COVENANTS OF THE ISSUER
 
     The Issuer covenants in the Indenture, among other matters, that it will
not (a) sell, exchange or otherwise dispose of any portion of the Collateral for
a Series of Bonds except as expressly permitted by the Indenture or the Master
Servicing Agreement, (b) amend Sections 2.03 or 10.01 of the Issuer's Deposit
Trust Agreement without the consent of the holders of 66 2/3% in outstanding
principal amount of each Class of Bonds affected thereby and any applicable Bond
Insurer or (c) incur, assume or guarantee any indebtedness other than in
connection with the issuance of the Bonds. (Indenture, Section 3.09) Section
2.03 of the Issuer's Deposit Trust Agreement provides that the trust shall not
have the power to perform any act or engage in any business whatsoever except to
issue and administer the Bonds of a Series, to receive and own the Collateral,
to maintain and administer the Collateral, to pledge the Collateral to support
such Bonds pursuant to the Indenture and to take certain other actions
incidental thereto. Section 10.01 of the Issuer's Deposit Trust Agreement
prohibits the amendment of the Deposit Trust Agreement if the Owner Trustee
determines that such amendment will adversely affect any right, duty or
liability of, or immunity or indemnity in favor of, the Owner Trustee under the
Issuer's Deposit Trust Agreement, or will cause or result in any conflict with
or breach of any terms of, or default under, the charter documents or bylaws of
the Owner Trustee or any document to which the Owner Trustee is a party and may
prohibit any amendment of the Deposit Trust Agreement without the consent of any
applicable Bond Insurer.
 
ISSUER'S ANNUAL COMPLIANCE STATEMENT
 
     The Issuer will be required to file annually with the Bond Trustee and any
applicable Bond Insurer a written statement as to fulfillment of its obligations
under the Indenture. (Indenture, Section 3.10)
 
BOND TRUSTEE'S ANNUAL REPORT
 
     The Bond Trustee will be required to mail each year to all Bondholders and
any applicable Bond Insurer a brief report relating to its eligibility and
qualifications to continue as the Bond Trustee under the Indenture, any amounts
advanced by it under the Indenture, the amount, interest rate and maturity date
of certain indebtedness owing by the Issuer to the Bond Trustee in its
individual capacity, the property and funds physically held by the Bond Trustee
as such, and any action taken by it which materially affects the Bonds and which
has not been previously reported. (Indenture, Section 7.03)
 
SATISFACTION AND DISCHARGE OF INDENTURE
 
     The Indenture will be discharged with respect to the Collateral securing
the Bonds of a Series upon the delivery to the Bond Trustee for cancellation of
all of the Bonds of such Series or, with certain limitations, upon deposit with
the Bond Trustee of funds sufficient for the payment in full of all of the Bonds
of such Series and all amounts due to any applicable Bond Insurer. (Indenture,
Section 4.01)
 
REPORT BY BOND TRUSTEE TO BONDHOLDERS
 
     On each Payment Date, the Bond Trustee will send a report to each
Bondholder and any applicable Bond Insurer setting forth the amount of such
payment representing interest, the amount thereof, if any, representing
principal, the amount of any related Advance and the outstanding principal
amount of Bonds of each Class (the aggregate principal amount of the Bonds of
each Class in the case of holders of Bonds on
 
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<PAGE>   126
 
which payments of interest only are then being made) after giving effect to the
payments made on such Payment Date. (Indenture, Section 8.06)
 
THE BOND TRUSTEE
 
     The Bond Trustee under each Indenture will be identified in the related
Prospectus Supplement.
 
                   CERTAIN LEGAL ASPECTS OF PLEDGED MORTGAGES
 
     The following discussion contains general summaries of certain legal
aspects of Pledged Mortgages. Because such legal aspects are governed primarily
by applicable state law (which laws may differ substantially from state to
state), the summaries do not purport to be complete nor to reflect the laws of
any particular state, nor to encompass the laws of all states in which Mortgaged
Properties may be located. The summaries are qualified in their entirety by
reference to the applicable federal and state laws governing the Pledged
Mortgages.
 
GENERAL
 
     The Pledged Mortgages will consist of notes and either mortgages, deeds of
trust, security deeds or deeds to secure debts, depending upon the prevailing
practice in the state in which the underlying Mortgaged Property is located.
Deeds of trust are used almost exclusively in California instead of mortgages. A
mortgage creates a lien upon the real property encumbered by the mortgage, which
lien is generally not prior to the lien for real estate taxes and assessments.
Priority between mortgages depends on their terms and generally on the order of
recording with a state or county office. There are two parties to a mortgage:
the mortgagor, who is the borrower and owner of the mortgaged property; and the
mortgagee, who is the lender. Under a mortgage instrument, the mortgagor
delivers to the mortgagee (i) a note or bond evidencing the loan and (ii) the
mortgage. Although a deed of trust is similar to a mortgage, a deed of trust has
three parties: the borrower-property owner, called the trustor (similar to a
mortgagor); a lender (similar to a mortgagee) called the beneficiary; and a
third-party grantee called the trustee. Under a deed of trust, the borrower
grants the property, irrevocably until the debt is paid, in trust, generally
with a power of sale, to the trustee to secure payment of the obligation. A
security deed and a deed to secure debt are special types of deeds which
indicate on their face that they are granted to secure an underlying debt. By
executing a security deed or deed to secure debt, the grantor conveys title to,
as opposed to merely creating a lien upon, the subject property to the grantee
until such time as the underlying debt is repaid. The trustee's authority under
a deed of trust, the mortgagee's authority under a mortgage and the grantee's
authority under a security deed or deed to secure a debt are governed by law,
and, with respect to some deeds of trust, the directions of the beneficiary.
 
     COOPERATIVES.  Certain of the Pledged Mortgages may be Cooperative Loans.
The Cooperative owns all the real property that comprises the project, including
the land, separate dwelling units and all common areas. The Cooperative is
directly responsible for project management and, in most cases, payment of real
estate taxes and hazard and liability insurance. If there is a blanket mortgage
on the Cooperative and/or underlying land, as is generally the case, the
Cooperative, as project mortgagor, is also responsible for meeting these
mortgage obligations. A blanket mortgage is ordinarily incurred by the
Cooperative in connection with the construction or purchase of the Cooperative's
apartment building. The interest of the occupant under proprietary leases or
occupancy agreements to which that Cooperative is a party are generally
subordinate to the interest of the holder of the blanket mortgage in that
building. If the Cooperative is unable to meet the payment obligations arising
under its blanket mortgage, the mortgagee holding the blanket mortgage could
foreclose on that mortgage and terminate all subordinate proprietary leases and
occupancy agreements. In addition, the blanket mortgage on a Cooperative may
provide financing in the form of a mortgage that does not fully amortize with a
significant portion of principal being due in one lump sum at final maturity.
The inability of the Cooperative to refinance this mortgage and its consequent
inability to make such final payment could lead to foreclosure by the mortgagee
providing the financing. A foreclosure in either event by the holder of the
blanket mortgage could eliminate or significantly diminish the value of any
collateral held by the lender who financed the purchase by an individual
tenant-stockholder of Cooperative shares or, in the case of any Mortgage
Collateral securing a Series of Bonds that includes Cooperative Loans, the
collateral securing the Cooperative Loans.
 
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<PAGE>   127
 
     The Cooperative is owned by tenant-stockholders who, through ownership of
stock, shares or membership certificates in the corporation, receive proprietary
leases or occupancy agreements which confer exclusive rights to occupy specific
units. Generally, a tenant-stockholder of a Cooperative must make a monthly
payment to the Cooperative representing such tenant-stockholder's pro rata share
of the Cooperative's payments for its blanket mortgage, real property taxes,
maintenance expenses and other capital or ordinary expenses. An ownership
interest in a Cooperative and accompanying rights is financed through a
Cooperative share loan evidenced by a promissory note and secured by a security
interest in the occupancy agreement or proprietary lease and in the related
Cooperative shares. The lender takes possession of the share certificate and a
counterpart of the proprietary lease or occupancy agreement, and a financing
statement covering the proprietary lease or occupancy agreement and the
Cooperative shares if filed in the appropriate state and local offices to
perfect the lender's interest in its collateral. Subject to the limitations
discussed below, upon default of the tenant-stockholder, the lender may sue for
judgment on the promissory note, dispose of the collateral at a public or
private sale or otherwise proceed against the collateral or tenant-stockholder
as an individual as provided in the security agreement covering the assignment
of the proprietary lease or occupancy agreement and the pledge of Cooperative
shares.
 
JUNIOR MORTGAGES
 
     Certain of the Pledged Mortgages may be secured by junior mortgages or
deeds of trust, which are junior to senior mortgages or deeds of trust which are
not part of the Mortgage Collateral. The rights of the Bondholders as the
holders of a junior deed of trust or a junior mortgage are subordinate in lien
priority and in payment priority to those of the holder of the senior mortgage
or deed of trust, including the prior rights of the senior mortgagee or
beneficiary to receive and apply hazard insurance and condemnation proceeds and,
upon default of the mortgagor, to cause a foreclosure on the property. Upon
completion of the foreclosure proceedings by the holder of the senior mortgage
or the sale pursuant to the deed of trust, the junior mortgagee's or junior
beneficiary's lien will be extinguished unless the junior lienholder satisfies
the defaulted senior loan or asserts its subordinate interest in a property in
foreclosure proceedings. See " -- Foreclosure/Repossession" below.
 
     Furthermore, the terms of the junior mortgage or deed of trust are
subordinate to the terms of the senior mortgage or deed of trust. In the event
of a conflict between the terms of the senior mortgage or deed of trust and the
junior mortgage or deed of trust, the terms of the senior mortgage or deed of
trust will govern generally. Upon a failure of the mortgagor or trustor to
perform any of its obligations, the senior mortgagee or beneficiary, subject to
the terms of the senior mortgage or deed of trust, may have the rights to
perform the obligation itself. Generally, all sums so expended by the mortgagee
or beneficiary become part of the indebtedness secured by the mortgage or deed
of trust. To the extent a senior mortgagee expends such sums, such sums will
generally have priority over all sums due under the junior mortgage.
 
FORECLOSURE/REPOSSESSION
 
     DEED OF TRUST.  Foreclosure of a deed of trust is generally accomplished by
a non-judicial sale under a specific provision in the deed of trust which
authorizes the trustee to sell the property at public auction upon any default
by the borrower under the terms of the note or deed of trust. In certain states,
such foreclosure also may be accomplished by judicial action in the manner
provided for foreclosure of mortgages. In addition to any notice requirements
contained in a deed of trust, in some states, such as California, the trustee
must record a notice of default and send a copy to the borrower-trustor and to
any person who has recorded a request for a copy of any notice of default and
notice of sale, to any successor in interest to the borrower-trustor, to the
beneficiary of any junior deed of trust and to certain other persons. In some
states, including California, the borrower-trustor has the right to reinstate
the loan at any time following default until shortly before the trustee's sale.
In general, the borrower, or any other person having a junior encumbrance on the
real estate, may, during a statutorily prescribed reinstatement period, cure a
monetary default by paying the entire amount in arrears plus other designated
costs and expenses incurred in enforcing the obligation. Generally, state law
controls the amount of foreclosure expenses and costs, including attorney's
fees, which may be recovered by a lender. After the reinstatement period has
expired without the default having been cured, the
 
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<PAGE>   128
 
borrower or junior lienholder no longer has the right to reinstate the loan and
must pay the loan in full to prevent the scheduled foreclosure sale. If the deed
of trust is not reinstated within any applicable cure period, a notice of sale
must be posted in a public place and, in most states, including California,
published for a specific period of time in one or more newspapers. In addition,
some state laws require that a copy of the notice of sale be posted on the
property and sent to all parties having an interest of record in the real
property. In California, the entire process from recording a notice of default
to a non-judicial sale usually takes four to five months.
 
     MORTGAGES.  Foreclosure of a mortgage is generally accomplished by judicial
action. The action is initiated by the service of legal pleadings upon all
parties having an interest in the real property. Delays in completion of the
foreclosure may occasionally result from difficulties in locating necessary
parties. Judicial foreclosure proceedings are often not contested by any of the
parties. When the mortgagee's right to foreclosure is contested, the legal
proceedings necessary to resolve the issue can be time consuming. After the
completion of a judicial foreclosure proceeding, the court generally issues a
judgment of foreclosure and appoints a referee or other court officer to conduct
the sale of the property. In some states, mortgages may also be foreclosed by
advertisement, pursuant to a power of sale provided in the mortgage.
 
     Although foreclosure sales are typically public sales, frequently no third
party purchaser bids in excess of the lender's lien because of the difficulty of
determining the exact status of title to the property, the possible
deterioration of the property during the foreclosure proceedings and a
requirement that the purchaser pay for the property in cash or by cashier's
check. Thus the foreclosing lender often purchases the property from the trustee
or referee for an amount equal to the principal amount outstanding under the
loan, accrued and unpaid interest and the expenses of foreclosure in which event
the mortgagor's debt will be extinguished, or the lender may purchase for a
lesser amount in order to preserve its right against a borrower to seek a
deficiency judgment in states where such judgment is available. Thereafter,
subject to the right of the borrower in some states to remain in possession
during the redemption period, the lender will assume the burden of ownership,
including obtaining hazard insurance and making such repairs at its own expense
as are necessary to render the property suitable for sale. The lender will
commonly obtain the services of a real estate broker and pay the broker's
commission in connection with the sale of the property. Depending upon market
conditions, the ultimate proceeds of the sale of the property may not equal the
lender's investment in the property. See "SECURITY FOR THE BONDS" herein.
 
     A junior mortgagee may not foreclose on the property securing a junior
mortgage unless it forecloses subject to the senior mortgages, in which case it
must either pay the entire amount due on the senior mortgages to the senior
mortgagees prior to or at the time of the foreclosure sale or undertake the
obligation to make payments on the senior mortgages in the event the mortgagor
is in default thereunder, in either event adding the amounts expended to the
balance due on the junior loan, and may be subrogated to the rights of the
senior mortgagees. In addition, in the event that the foreclosure of a junior
mortgage triggers the enforcement of a "due-on-sale" clause, the junior
mortgagee may be required to pay the full amount of the senior mortgages to the
senior mortgagees. Accordingly, with respect to those mortgage loans which are
junior mortgage loans, if the lender purchases the property, the lender's title
will be subject to all senior liens and claims and certain governmental liens.
The proceeds received by the referee or trustee from the sale are applied first
to the costs, fees and expenses of sale and then in satisfaction of the
indebtedness secured by the mortgage or deed of trust under which the sale was
conducted. Any remaining proceeds are generally payable to the holders of junior
mortgages or deeds of trust and other liens and claims in order of their
priority, whether or not the borrower is in default. Any additional proceeds are
generally payable to the mortgagor or trustor. The payment of the proceeds to
the holders of junior mortgages may occur in the foreclosure action of the
senior mortgagee or may require the institution of separate legal proceedings.
 
     Courts have imposed general equitable principles upon foreclosure, which
are generally designed to mitigate the legal consequences to the borrower of the
borrower's defaults under the loan documents. Some courts have been faced with
the issue of whether federal or state constitutional provisions reflecting due
process concerns for fair notice require that borrowers under deeds of trust
receive notice longer than that prescribed by statute. For the most part, these
cases have upheld the notice provisions as being reasonable or have found that
the sale by a trustee under a deed of trust does not involve sufficient state
action to afford constitutional protection to the borrower.
 
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<PAGE>   129
 
     COOPERATIVE LOANS.  The Cooperative shares owned by the tenant-stockholder
and pledged to the lender are, in almost all cases, subject to restrictions on
transfer as set forth in the Cooperative's certificate of incorporation and
bylaws, as well as the proprietary lease or occupancy agreement, and may be
cancelled by the Cooperative for failure by the tenant-stockholder to pay rent
or other obligations or charges owed by such tenant-stockholder, including
mechanics' liens against the cooperative apartment building incurred by such
tenant-stockholder. The proprietary lease or occupancy agreement generally
permits the Cooperative to terminate such lease or agreement in the event an
obligor fails to make payments or defaults in the performance of covenants
required thereunder. Typically, the lender and the Cooperative enter into a
recognition agreement which establishes the rights and obligations of both
parties in the event of a default by the tenant-stockholder on its obligations
under the proprietary lease or occupancy agreement. A default by the
tenant-stockholder under the proprietary lease or occupancy agreement will
usually constitute a default under the security agreement between the lender and
the tenant-stockholder.
 
     The recognition agreement generally provides that, in the event that the
tenant-stockholder has defaulted under the proprietary lease or occupancy
agreement, the Cooperative will take no action to terminate such lease or
agreement until the lender has been provided with an opportunity to cure the
default. The recognition agreement typically provides that if the proprietary
lease or occupancy agreement is terminated, the Cooperative will recognize the
lender's lien against proceeds from the sale of the Cooperative apartment,
subject, however, to the Cooperative's right to sums due under such proprietary
lease or occupancy agreement. The total amount owed to the Cooperative by the
tenant-stockholder, which the lender generally cannot restrict and does not
monitor, could reduce the value of the collateral below the outstanding
principal balance of the Cooperative Loan and accrued and unpaid interest
thereon.
 
     Recognition agreements also provide that in the event of a foreclosure on a
Cooperative Loan, the lender must obtain the approval or consent of the
Cooperative as required by the proprietary lease before transferring the
Cooperative shares or assigning the proprietary lease. Generally, the lender is
not limited in any rights it may have to dispossess the tenant-stockholders.
 
     In some states, foreclosure on the Cooperative shares is accomplished by a
sale in accordance with the provisions of Article 9 of the Uniform Commercial
Code (the "UCC") and the security agreement relating to those shares. Article 9
of the UCC requires that a sale be conducted in a "commercially reasonable"
manner. Whether a foreclosure sale has been conducted in a "commercially
reasonable" manner will depend on the facts in each case. In determining
commercial reasonableness, a court will look to the notice given the debtor and
the method, manner, time, place and terms of the foreclosure. Generally, a sale
conducted according to the usual practice of banks selling similar collateral
will be considered reasonably conducted.
 
     Article 9 of the UCC provides that the proceeds of the sale will be applied
first to pay the costs and expenses of the sale and then to satisfy the
indebtedness secured by the lender's security interest. The recognition
agreement, however, generally provides that the lender's right to reimbursement
is subject to the right of the Cooperative to receive sums due under the
proprietary lease or occupancy agreement. If there are proceeds remaining, the
lender must account to the tenant-stockholder for the surplus. Conversely, if a
portion of the indebtedness remains unpaid, the tenant-stockholder is generally
responsible for the deficiency. See " -- Anti-Deficiency Legislation and Other
Limitations on Lenders" below.
 
     In the case of foreclosure on a building which was converted from a rental
building to a building owned by a Cooperative under a non-eviction plan, some
states require that a purchaser at a foreclosure sale take the property subject
to rent control and rent stabilization laws which apply to certain tenants who
elected to remain in the building but who did not purchase shares in the
Cooperative when the building was so converted.
 
RIGHTS OF REDEMPTION
 
     In some states, after sale pursuant to a deed of trust or foreclosure of a
mortgage, the borrower and certain foreclosed junior lienholders are given a
statutory period in which to redeem the property from the foreclosure sale. In
certain other states, including California, this right of redemption applies
only to sales following judicial foreclosure, and not to sales pursuant to a
non-judicial power of sale. In most states where the right of redemption is
available, statutory redemption may occur upon a payment of the foreclosure
 
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purchase price, accrued interest and taxes. In some states, the right to redeem
is an equitable right. The effect of a right of redemption is to diminish the
ability of the lender to sell the foreclosed property. The exercise of a right
of redemption would defeat the title of any purchaser at a foreclosure sale, or
of any purchaser from the lender subsequent to judicial foreclosure or sale
under a deed of trust. Consequently, the practical effect of the redemption
right is to force the lender to retain the property and pay the expenses of
ownership until the redemption period has run.
 
ANTI-DEFICIENCY LEGISLATION AND OTHER LIMITATIONS ON LENDERS
 
     Certain states have imposed statutory restrictions that limit the remedies
of a beneficiary under a deed of trust or a mortgagee under a mortgage. In some
states, including California, statutes limit the right of the beneficiary or
mortgagee to obtain a deficiency judgment against the borrower following
foreclosure or sale under a deed of trust. A deficiency judgment is a personal
judgment against the former borrower equal in most cases to the difference
between the amount due to the lender and the current fair market value of the
property at the time of the foreclosure sale. As a result of these prohibitions,
it is anticipated that in most instances the Master Servicer or applicable
Servicer will utilize the non-judicial foreclosure remedy and will not seek
deficiency judgments against defaulting mortgagors.
 
     Some state statutes may require the beneficiary or mortgagee to exhaust the
security afforded under a deed of trust or mortgage by foreclosure in an attempt
to satisfy the full debt before bringing a personal action against the borrower.
In certain other states, the lender has the option of bringing a personal action
against the borrower on the debt without first exhausting such security;
however, in some of these states, the lender, following judgment on such
personal action, may be deemed to have elected a remedy and may be precluded
from exercising remedies with respect to the security. Consequently, the
practical effect of the election requirement, when applicable, is that lenders
will usually proceed first against the security rather than bringing a personal
action against the borrower.
 
     In some states, exceptions to the anti-deficiency statutes are provided for
in certain instances where the value of the lender's security has been impaired
by acts or omissions of the borrower, for example, in the event of waste of the
property. Finally, other statutory provisions limit any deficiency judgment
against the former borrower following a foreclosure sale to the excess of the
outstanding debt over the fair market value of the property at the time of the
public sale. The purpose of these statutes is generally to prevent a beneficiary
or a mortgagee from obtaining a large deficiency judgment against the former
borrower as a result of low or no bids at the foreclosure sale.
 
     In addition to anti-deficiency and related legislation, numerous other
federal and state statutory provisions, including the federal bankruptcy laws,
the federal Soldiers' and Sailors' Civil Relief Act of 1940 and state laws
affording relief to debtors, may interfere with or affect the ability of the
secured mortgage lender to realize upon its security. For example, in a
proceeding under the federal Bankruptcy Code, a lender may not foreclose on a
mortgaged property without the permission of the bankruptcy court. In certain
instances, a rehabilitation plan proposed by the debtor may reduce the secured
indebtedness to the value of the mortgaged property as of the date of the
commencement of the bankruptcy, rendering the lender a general unsecured
creditor for the difference, and also may reduce the monthly payments due under
such mortgage loan, change the rate of interest and alter the mortgage loan
repayment schedule. The effect of any such proceedings under the federal
Bankruptcy Code, including but not limited to any automatic stay, could result
in delays in receiving payments on the Pledged Mortgages securing a Series of
Bonds and possible reductions in the aggregate amount of such payments.
 
     The federal tax laws provide priority to certain tax liens over the lien of
a mortgage or secured party. Numerous federal and state consumer protection laws
impose substantive requirements upon mortgage lenders in connection with the
origination, servicing and enforcement of mortgage loans. These laws include the
federal Truth-in-Lending Act, Real Estate Settlement Procedures Act, Equal
Credit Opportunity Act, Fair Credit Billing Act, Fair Credit Reporting Act and
related statutes and regulations. These federal and state laws impose specific
statutory liabilities upon lenders who fail to comply with the provisions of the
law. In some cases, this liability may affect assignees of the loans.
 
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<PAGE>   131
 
     Generally, Article 9 of the UCC governs foreclosure on Cooperative shares
and the related proprietary lease or occupancy agreement. Some courts have
interpreted section 9-504 of the UCC to prohibit a deficiency award unless the
creditor establishes that the sale of the collateral (which, in the case of a
Cooperative Loan, would be the shares of the Cooperative and the related
proprietary lease or occupancy agreement) was conducted in a commercially
reasonable manner.
 
ENVIRONMENTAL RISKS
 
     Real property pledged as security to a lender may be subject to unforeseen
environmental risks. Under the laws of certain states, contamination of a
property may give rise to a lien on the property to assure the payment of the
costs of clean-up. In several states, such a lien has priority over the lien of
an existing mortgage against such property. In addition, under the federal
Comprehensive Environmental Response, Compensation and Liability Act of 1980
("CERCLA"), the United States Environmental Protection Agency ("EPA") may impose
a lien on property where the EPA has incurred cleanup costs. However, a CERCLA
lien is subordinate to pre-existing, perfected security interests.
 
     Under the laws of some states, and under CERCLA, it is conceivable that a
secured lender may be held liable as an "owner or operator" for the costs of
addressing releases or threatened releases of hazardous substances at a
Mortgaged Property even though the environmental damage or threat was caused by
a prior or current owner or operator or a third-party. CERCLA imposes liability
for such costs on any and all "responsible parties," including "owners or
operators." However, CERCLA excludes from the definition of "owner or operator"
a secured creditor "who without participating in the management of the
facility," holds indicia of ownership primarily to protect its security interest
(the "secured creditor exclusion"). Thus, if a lender's activities begin to
encroach on the actual management of a contaminated facility or property, the
lender may incur liability as an "owner or operator" under CERCLA. Similarly, if
a lender forecloses and takes title to a contaminated facility or property, the
lender may incur CERCLA liability in various circumstances, including, but not
limited to, when it holds the facility or property as an investment (including
leasing the facility or property to a third party), or fails to market the
property in a timely fashion.
 
     Whether actions taken by a lender would constitute participation in the
management of a mortgaged property, or the business of a borrower, so as to
render the secured creditor exemption unavailable to a lender has been a matter
of judicial interpretation of the statutory language, and court decisions have
been inconsistent. In 1990, the Court of Appeals for the Eleventh Circuit
suggested that the mere capacity of the lender to influence a borrower's
decisions regarding disposal of hazardous substances was sufficient
participation in the management of the borrower's business to deny the
protection of the secured creditor exemption to the lender.
 
     This ambiguity appears to have been resolved by the enactment of the Asset
Conservation, Lender Liability and Deposit Insurance Protection Act of 1996,
which was signed into law by President Clinton on September 30, 1996. The new
legislation provides that in order to be deemed to have participated in the
management of a mortgaged property, a lender must actually participate in the
operational affairs of the property or the borrower. The legislation also
provides that participation in the management of the property does not include
"merely having the capacity to influence, or unexercised right to control"
operations. Rather, a lender will lose the protection of the secured creditor
exemption only if it exercises decision-making control over the day-to-day
management of all operational functions of the mortgaged property.
 
     If a lender is or becomes liable, it can bring an action for contribution
against any other "responsible parties," including a previous owner or operator,
who created the environmental hazard, but those persons or entities may be
bankrupt or otherwise judgment proof. The costs associated with environmental
cleanup may be substantial. It is conceivable that such costs arising from the
circumstances set forth above would become a liability of the Issuer and
occasion a loss to Bondholders.
 
     CERCLA does not apply to petroleum products, and the secured creditor
exclusion does not govern liability for cleanup costs under federal laws other
than CERCLA, in particular Subtitle I of the federal Resource Conservation and
Recovery Act ("RCRA"), which regulates underground petroleum storage tanks
(except heating oil tanks). The EPA has adopted a lender liability rule for
underground storage tanks under
 
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<PAGE>   132
 
Subtitle I of RCRA. Under such rule, a holder of a security interest in an
underground storage tank or real property containing an underground storage tank
is not considered an operator of the underground storage tank as long as
petroleum is not added to, stored in or dispensed from the tank. In addition,
under the Asset Conservation, Lender Liability and Deposit Insurance Protection
Act of 1996, the protections accorded to lenders under CERCLA are also accorded
to the holders of security interests in underground storage tanks. It should be
noted, however, that liability for cleanup of petroleum contamination may be
governed by state law, which may not provide for any specific protection for
secured creditors.
 
     Except as otherwise specified in the applicable Prospectus Supplement, at
the time the Pledged Mortgages or the mortgage loans underlying the
Certificates, as the case may be, were originated, no environmental assessment
or a very limited environmental assessment of the Mortgaged Properties or the
real property constituting security for such mortgage loans, respectively, was
conducted.
 
DUE-ON-SALE CLAUSES
 
     Unless otherwise provided in the related Prospectus Supplement, each
Pledged Mortgage will contain a due-on-sale clause which will generally provide
that if the mortgagor or obligor sells, transfers or conveys the Mortgaged
Property, the loan may be accelerated by the mortgagee. In recent years, court
decisions and legislative actions have placed substantial restriction on the
right of lenders to enforce such clauses in many states. For instance, the
California Supreme Court in August 1978 held that due-on-sale clauses were
generally unenforceable. However, the Garn-St Germain Depository Institutions
Act of 1982 (the "Garn-St Germain Act"), subject to certain exceptions, preempts
state constitutional, statutory and case law prohibiting the enforcement of
due-on-sale clauses. As a result, due-on-sale clauses have become generally
enforceable except in those states whose legislatures exercised their authority
to regulate the enforceability of such clauses with respect to mortgage loans
that were (i) originated or assumed during the "window period" under the Garn-St
Germain Act which ended in all cases not later than October 15, 1982, and (ii)
originated by lenders other than national banks, federal savings institutions
and federal credit unions. FHLMC has taken the position in its published
mortgage servicing standards that, out of a total of eleven "window period
states," five states (Arizona, Michigan, Minnesota, New Mexico and Utah) have
enacted statutes extending, for various terms and for varying periods, the
prohibition on enforcement of due-on-sale clauses with respect to certain
categories of window period loans. Also, the Garn-St Germain Act does
"encourage" lenders to permit assumption of loans at the original rate of
interest or at some other rate less than the average of the original rate and
the market rate.
 
     As to loans secured by an owner-occupied residence, the Garn-St Germain Act
sets forth nine specific instances in which a mortgagee covered by the Garn-St
Germain Act may not exercise its rights under a due-on-sale clause,
notwithstanding the fact that a transfer of the property may have occurred. The
inability to enforce a due-on-sale clause may result in transfer of the related
Mortgaged Property to an uncreditworthy person, which could increase the
likelihood of default or may result in a mortgage bearing an interest rate below
the current market rate being assumed by a new home buyer, which may affect the
average life of the Pledged Mortgages and the number of Pledged Mortgages which
may extend to maturity.
 
ENFORCEABILITY OF PREPAYMENT CHARGES AND LATE PAYMENT FEES
 
     Forms of notes, mortgages and deeds of trust used by lenders may contain
provisions obligating the borrower to pay a late charge if payments are not
timely made, and in some circumstances may provide for prepayment fees or
penalties if the obligation is paid prior to maturity. In certain states, there
are or may be specific limitations upon the late charges which a lender may
collect from a borrower for delinquent payments. Certain states also limit the
amounts that a lender may collect from a borrower as an additional charge if the
loan is prepaid.
 
     Under certain state laws, prepayment charges may not be imposed after a
certain period of time following the origination of mortgage loans with respect
to prepayments on loans secured by liens encumbering owner-occupied residential
properties. Since many of the Mortgaged Properties will be owner-occupied, it is
anticipated that prepayment charges may not be imposed with respect to many of
the Pledged Mortgages. The
 
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absence of such a restraint on prepayment, particularly with respect to Fixed
Rate Pledged Mortgages having higher interest rates, may increase the likelihood
of refinancing or other early retirement of such loans or contracts. Late
charges and prepayment fees are typically retained by servicers as additional
servicing compensation.
 
APPLICABILITY OF USURY LAWS
 
     Title V of the Depository Institutions Deregulation and Monetary Control
Act of 1980, enacted in March 1980 ("Title V"), provides that state usury
limitations shall not apply to certain types of residential first mortgage loans
originated by certain lenders after March 31, 1980. The Office of Thrift
Supervision, as successor to the Federal Home Loan Bank Board, is authorized to
issue rules and regulations and to publish interpretations governing
implementation of Title V. The statute authorized the states to reimpose
interest rate limits by adopting, before April 1, 1983, a law or constitutional
provision which expressly rejects an application of the federal law. In
addition, even where Title V is not so rejected, any state is authorized by the
law to adopt a provision limiting discount points or other charges on mortgage
loans covered by Title V. Certain states have taken action to reimpose interest
rate limits and/or to limit discount points or other charges.
 
SOLDIERS' AND SAILORS' CIVIL RELIEF ACT
 
     Generally, under the terms of the Soldiers' and Sailors' Civil Relief Act
of 1940, as amended (the "Relief Act"), a borrower who enters military service
after the origination of such borrower's mortgage loan (including a borrower who
is a member of the National Guard or is in reserve status at the time of the
origination of the mortgage loan and is later called to active duty) may not be
charged interest above an annual rate of 6% during the period of such borrower's
active duty status, unless a court orders otherwise upon application of the
lender. It is possible that such interest rate limitation could have an effect,
for an indeterminate period of time, on the ability of the Master Servicer or
applicable Servicer to collect full amounts of interest on certain of the
Pledged Mortgages. Any shortfall in interest collections resulting from the
application of the Relief Act could result in losses to the holders of the
Bonds. In addition, the Relief Act imposes limitations which would impair the
ability of the Master Servicer to foreclose on an affected Pledged Mortgage
during the borrower's period of active duty status. Thus, in the event that such
a Pledged Mortgage goes into default, there may be delays and losses occasioned
by the inability to realize upon the Mortgaged Property in a timely fashion.
 
SUBORDINATE FINANCING
 
     When the mortgagor encumbers mortgaged property with one or more junior
liens, the senior lender is subjected to additional risk. First, the mortgagor
may have difficulty servicing and repaying multiple loans. In addition, if the
junior loan permits recourse to the mortgagor (as junior loans often do) and the
senior loan does not, a mortgagor may be more likely to repay sums due on the
junior loan than those on the senior loan. Second, acts of the senior lender
that prejudice the junior lender or impair the junior lender's security may
create a superior equity in favor of the junior lender. For example, if the
mortgagor and the senior lender agree to an increase in the principal amount of
or the interest rate payable on the senior loan, the senior lender may lose its
priority to the extent an existing junior lender is harmed or the mortgagor is
additionally burdened. Third, if the mortgagor defaults on the senior loan
and/or any junior loan or loans, the existence of junior loans and actions taken
by junior lenders can impair the security available to the senior lender and can
interfere with or delay the taking of action by the senior lender. Moreover, the
bankruptcy of a junior lender may operate to stay foreclosure or similar
proceeds by the senior lender.
 
                        FEDERAL INCOME TAX CONSEQUENCES
 
     The following is a summary of the anticipated material federal income tax
consequences of the purchase, ownership and disposition of the Bonds. This
summary has been reviewed by Giancarlo & Gnazzo, A Professional Corporation, tax
counsel to the Company and the Issuer, and, to the extent that it states legal
conclusions, represents the opinion of such tax counsel, subject to the
limitations and qualifications set forth
 
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<PAGE>   134
 
herein and in the applicable Prospectus Supplement. The summary is based on the
Internal Revenue Code of 1986, as amended (the "Code"), regulations, rulings and
decisions in effect as of the date of this Prospectus, all of which are subject
to change. The summary also takes into account regulations issued on February 2,
1994, regarding the taxation of debt instruments with original issue discount
(the "OID Regulations"). The summary does not purport to address federal income
tax consequences applicable to all categories of investors, some of which may be
subject to special rules. In addition, the summary is limited to investors who
will hold the Bonds as "capital assets" (generally, property held for
investment) as defined in Section 1221 of the Code. Investors should consult
their own tax advisors in determining the federal, state, local and any other
tax consequences to them of the purchase, ownership and disposition of the
Bonds. As applied to any particular Bond, the summary is subject to further
discussion or change as provided in the related Prospectus Supplement.
 
CLASSIFICATION OF THE ISSUER AND THE BONDS
 
     No regulations, published rulings or judicial decisions discuss the
characterization for federal income tax purposes of securities with terms
substantially the same as the Bonds. Upon the issuance of each Series of Bonds,
however, Giancarlo & Gnazzo, A Professional Corporation, tax counsel to the
Issuer, will advise the Issuer that in its opinion such Bonds will be treated
for federal income tax purposes as indebtedness and not as an ownership interest
in the Collateral, or an equity interest in the Issuer or in a separate
association taxable as a corporation.
 
     Under the taxable mortgage pool ("TMP") rules in the Code, certain entities
that issue debt secured by real estate mortgages are subject to special tax
treatment that can result in entity level federal income taxation. An entity
will be classified as a TMP if it does not make an election to be classified as
a "real estate mortgage investment conduit" (a "REMIC") and (i) substantially
all of its assets consist of debt obligations and more than 50% of such debt
obligations are real estate mortgages or interests therein, (ii) the entity
issues debt obligations with two or more maturities and (iii) payments on the
debt obligations issued by it bear a relationship to payments received on the
debt obligations owned by it. In certain situations, pools of assets within an
entity can also be treated as separate TMPs.
 
     The Company does not intend to make an election for any Issuer to be
classified as a REMIC. Further, the Company intends to structure all issuances
of Bonds, unless otherwise specified in the related Prospectus Supplement, so as
to not constitute a TMP. However, it is possible that the Issuer or a portion of
the Issuer relating to a specific pool of Mortgage Collateral and the Bonds
related thereto could be treated as a TMP. If an Issuer was classified as a TMP,
it is anticipated that it would nonetheless qualify as a "qualified REIT
subsidiary" (within the meaning of Section 856 (i) of the Code) and thus would
not be subject to entity level federal income taxes. If so, only Redwood Trust
or its shareholders would be required to include in income any "excess inclusion
income" generated by the TMP. On the other hand, if the Issuer was classified as
a TMP but did not maintain its status as a "qualified REIT subsidiary", it would
not be permitted to be included in the consolidated federal income tax return of
any other corporation and its net income would be subject to entity level
federal income taxes. Each Prospectus Supplement will specify whether or not the
Issuer for that Series of Bonds is expected to be classified as a TMP. No
assurance can be given that any Issuer classified as a TMP will continue to
qualify as a "qualified REIT subsidiary" or that Redwood Trust will continue to
qualify as a REIT for federal income tax purposes.
 
     Because the Bonds will be treated as indebtedness of the Issuer for federal
income tax purposes, (i) Bonds held by a thrift institution taxed as a domestic
building and loan association will not constitute "loans . . . secured by an
interest in real property" within the meaning of Code Section 7701(a)(19)(C)(v),
(ii) interest on Bonds held by a real estate investment trust will not be
treated as "interest on obligations secured by mortgages on real property or on
interests in real property" within the meaning of Code Section 856(c)(3)(B), and
Bonds will not constitute "real estate assets" or "Government securities" within
the meaning of Code Section 856(c)(5)(A), and (iii) Bonds held by a regulated
investment company will not constitute "Government securities" within the
meaning of Code Section 851(b)(4)(A)(i).
 
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<PAGE>   135
 
INTEREST AND ORIGINAL ISSUE DISCOUNT
 
     GENERAL.  The Prospectus Supplement for each Series of Bonds will disclose
whether any Class of such Bonds is anticipated to be issued with "original issue
discount" within the meaning of Code Section 1273(a). Interest on any Class of
Bonds other than original issue discount will be includible in income by the
Holder thereof in accordance with such Holder's applicable method of accounting.
Holders of any Class of Bonds having original issue discount must generally
include original issue discount in ordinary gross income for federal income tax
purposes as it accrues, in advance of receipt of the cash attributable to such
income. Each Issuer will indicate on the face of each Bond issued by it
information concerning the application of the original issue discount rules to
such Bond and certain other information that may be required. The Issuer will
report annually to the Internal Revenue Service (the "IRS") and to holders of
record of such Bonds information with respect to the original issue discount
accruing on such Bonds during the reporting period.
 
     Rules governing original issue discount are set forth in Code Sections 1271
through 1273, 1275 and 1281 through 1283. In addition, the discussion of federal
income tax consequences set forth below is based in part on the OID Regulations.
The Code or the OID Regulations either do not address, or are subject to varying
interpretations with respect to, several issues relevant to obligations, such as
the Bonds, that are subject to prepayment. Therefore, there is some uncertainty
as to the manner in which the original issue discount rules of the Code will be
applied to the Bonds.
 
     ORIGINAL ISSUE DISCOUNT DEFINED.  In general, each Bond will be treated as
a single installment obligation for purposes of determining the original issue
discount includible in a Bondholder's income. The amount of original issue
discount on such a Bond is the excess of the stated redemption price at maturity
of the Bond over its issue price. The issue price of a Bond is the initial
offering price to the public at which a substantial amount of the Bonds of that
Class are first sold to the public (excluding bond houses, brokers, underwriters
or wholesalers), generally as set forth on the cover page of the Prospectus
Supplement for a Series of Bonds. (The portion of the initial offering price
which consists of interest accrued on the Bonds from the date of issuance to the
Closing Date may, at the option of the Bondholder, be subtracted from the issue
price of the Bonds and treated as an offset of interest received on the first
Payment Date.) The stated redemption price at maturity of a Bond is equal to the
total of all payments to be made on the Bond other than "qualified stated
interest payments." "Qualified stated interest payments" are payments on the
Bonds which are paid at least annually and are based on either a fixed rate or a
"qualified variable rate." Under the OID Regulations, interest is treated as
payable at a "qualified variable rate" and not as contingent interest if,
generally, (i) such interest is unconditionally payable at least annually, (ii)
the issue price of the Bond does not exceed the total noncontingent principal
payments and (iii) interest is based on a "qualified floating rate," an
"objective rate," or a combination of "qualified floating rates" that do not
operate in a manner that significantly accelerates or defers interest payments
on such Bond. Generally, the stated redemption price at maturity of a Bond
(other than a Deferred Interest Bond or a Payment Lag Bond, as defined below) is
its stated principal amount; the stated redemption price at maturity of a
Deferred Interest Bond is the sum of all payments (regardless of how
denominated) scheduled to be received on such Bond under the Tax Prepayment
Assumption (as defined below). Any payment of interest that is not a qualified
stated interest payment is a "contingent interest payment." The related
Prospectus Supplement will discuss whether the payments of interest on a Bond
are qualified stated interest payments and the treatment for federal income tax
purposes of any contingent interest payments.
 
     DE MINIMIS ORIGINAL ISSUE DISCOUNT.  Notwithstanding the general definition
of original issue discount above, any original issue discount with respect to a
Bond will be considered to be zero if such discount is less than 0.25% of the
stated redemption price at maturity of the Bond multiplied by its weighted
average life (a "de minimis" amount). The weighted average life of a Bond for
this purpose is the sum of the following amounts (computed for each payment
included in the stated redemption price at maturity of the Bond): (i) the number
of complete years (rounded down for partial years) from the Closing Date until
the date on which each such payment is scheduled to be made under the Tax
Prepayment Assumption, multiplied by (ii) a fraction, the numerator of which is
the amount of the payment, and the denominator of which is the Bond's stated
redemption price at maturity. Bondholders generally must report de minimis
original issue discount pro rata as principal payments are received, and such
income will be capital gain if the Bond is held as a capital asset. However,
accrual method holders may elect to accrue all interest on a Bond, including de
 
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minimis original issue discount and market discount and as adjusted by any
premium, under a constant yield method.
 
     ACCRUAL OF ORIGINAL ISSUE DISCOUNT.  The amount and rate of accrual of
original issue discount must be calculated based on a reasonable assumed
prepayment rate for the Pledged Mortgages, the mortgage loans underlying the
Certificates and/or other Mortgage Collateral securing the Bonds (the "Tax
Prepayment Assumption") and to prescribe a method for adjusting the amount and
rate of accrual of such discount. However, if such mortgage loans prepay at a
rate slower than the Tax Prepayment Assumption, no deduction for original issue
discount previously accrued, based on the Tax Prepayment Assumption, is allowed.
The Tax Prepayment Assumption will be determined in the manner prescribed by
regulations that have not yet been issued. It is anticipated that the
regulations will require that the Tax Prepayment Assumption be the prepayment
assumption that is used in determining the initial offering price of such Bonds.
The related Prospectus Supplement for each Series of Bonds will specify the Tax
Prepayment Assumption determined by the Issuer for the purposes of determining
the amount and rate of accrual of original issue discount. No representation is
made that the Mortgage Collateral will prepay at the Tax Prepayment Assumption
or at any other rate.
 
     Generally, a Bondholder must include in gross income the sum of the "daily
portions," as determined below, of the original issue discount that accrues on a
Bond for each day the Bondholder holds that Bond, including the purchase date
but excluding the disposition date. In the case of an original holder of a Bond,
a calculation will be made of the portion of the original issue discount that
accrues during each successive period (or shorter period from date of original
issue) (an "accrual period") that ends on the day in the calendar year
corresponding to each of the Payment Dates on the Bonds (or the date prior to
each such date). This will be done, in the case of each full accrual period, by
adding (A) the present value at the end of the accrual period of all remaining
payments to be received (based on (i) the yield to maturity of the Bond at the
issue date, (ii) events (including actual prepayments) that have occurred prior
to the end of the accrual period, and (iii) the Tax Prepayment Assumption) and
(B) any payments received during such accrual period, other than payments of
qualified stated interest, and subtracting from that total the "adjusted issue
price" of the Bonds at the beginning of such accrual period. The adjusted issue
price of a Bond at the beginning of the initial accrual period is its issue
price; the adjusted issue price of a Bond at the beginning of a subsequent
accrual period is the adjusted issue price at the beginning of the immediately
preceding accrual period plus the amount of original issue discount allocable to
the accrual period and reduced by the amount of any payment other than a payment
of qualified stated interest made at the end of or during that accrual period.
The original issue discount accrued during such accrual period will then be
divided by the number of days in the period to determine the daily portion of
original issue discount for each day in the period. With respect to an initial
accrual period shorter than a full accrual period, the daily portions of
original issue discount must be determined according to any reasonable method,
provided that such method is consistent with the method used to determine yield
on the Bonds.
 
     With respect to any Bond that is a Variable Rate Debt Instrument, the sum
of the daily portions of original issue discount that is includible in the
holder's gross income is determined under the same principles described above,
with the following modifications: the yield to maturity on the Bonds should be
calculated as if the interest index remained at its value as of the issue date
of such Bonds. Because the proper method of adjusting accruals of OID on a
Variable Rate Debt Instrument as a result of prepayments is uncertain, holders
of such instruments should consult their own tax advisors regarding the
appropriate treatment of such Bonds for federal income tax purposes.
 
     Purchasers of Bonds with the above key features for which the period
between the Closing Date and the first Payment Date does not exceed the Payment
Date Interval would nevertheless pay upon purchase of the Bonds an additional
amount of accrued interest as compared with the accrued interest that would be
paid if interest accrued from Payment Date to Payment Date. This accrued
interest (together with any accrued interest with respect to which the
Bondholder chooses not to treat as an offset to interest paid on the first
Payment Date, as described above) should be treated for federal income tax
purposes as part of the initial purchase price of the Bonds. Bonds described in
this paragraph issued or purchased at a discount would be
 
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<PAGE>   137
 
treated as being issued or purchased at a smaller discount or at a premium, and
such Bonds issued or purchased at a premium would be treated as being issued or
purchased at a larger premium.
 
     SUBSEQUENT PURCHASERS.  A subsequent purchaser of a Deferred Interest Bond
or a subsequent purchaser of any other Bond issued with original issue discount
who purchases the Bond at a cost less than the remaining stated redemption price
at maturity, will also be required to include in gross income for all days
during his or her taxable year on which such Bond is held, the sum of the daily
portions of original issue discount on the Bond. In computing the daily portions
of original issue discount with respect to a Bond for such a subsequent
purchaser, however, the daily portion for any day shall be reduced by the amount
that would be the daily portion for such day (computed in accordance with the
rules set forth above) multiplied by a fraction, the numerator of which is the
amount, if any, by which the price paid by such holder for the Bond exceeds its
adjusted issue price (the "acquisition premium"), and the denominator of which
is the amount by which the remaining stated redemption price at maturity exceeds
the adjusted issue price.
 
PREMIUM
 
     A holder who purchases a Bond at a cost greater than its stated redemption
price at maturity generally will be considered to have purchased the Bond at a
premium, which it may elect to amortize as an offset to interest income on such
Bond (and not as a separate deduction item) on a constant yield method. Although
no regulations addressing the computation of premium accrual on securities
similar to the Bonds have been issued, the legislative history of the Tax Reform
Act of 1986 indicates that premium is to be accrued in the same manner as market
discount. Accordingly, it appears that the accrual of premium on a Class of
Bonds of a Series will be calculated using the prepayment assumption used in
pricing such Class. If a holder makes an election to amortize premium on a Bond,
such election will apply to all taxable debt instruments (including all REMIC
regular interests and all pass-through certificates representing ownership
interests in a trust holding debt obligations) held by the holder at the
beginning of the taxable year in which the election is made, and to all taxable
debt instruments acquired thereafter by such holder, and will be irrevocable
without the consent of the Internal Revenue Service. Purchasers who pay a
premium for the Bonds should consult their tax advisers regarding the election
to amortize premium and the method to be employed.
 
ELECTION TO TREAT ALL INTEREST AS ORIGINAL ISSUE DISCOUNT
 
     The OID Regulations permit a holder of a Bond to elect to accrue all
interest, discount (including de minimis market or original issue discount) and
premium in income as interest, based on a constant yield method for Bonds
acquired on or after April 4, 1994. If such an election were to be made with
respect to a Bond with market discount, the holder of the Bond would be deemed
to have made an election to include in income currently market discount with
respect to all other debt instruments having market discount that such holder of
the Bonds acquires during the year of the election or thereafter. Similarly, a
holder of a Bond that makes this election for a Bond that is acquired at a
premium will be deemed to have made an election to amortize bond premium with
respect to all debt instruments having amortizable bond premium that such holder
owns or acquires. The election to accrue interest, discount and premium on a
constant yield method with respect to a Bond is irrevocable.
 
REALIZED LOSSES
 
     Bondholders generally are required to accrue interest and original issue
discount with respect to the Bonds without giving effect to any reductions in
distributions attributable to defaults or delinquencies on the Mortgage
Collateral until it can be established that any such reductions ultimately will
not be recoverable. Although a holder of a Bond will eventually be entitled to
recognize a loss or reduce income attributable to the Bonds if distribution
reductions are ultimately not recovered, the law is unclear with respect to the
timing and the character thereof and mismatches may result that further compound
the economic losses associated with reduced distributions on the Bonds.
 
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<PAGE>   138
 
SALE OR REDEMPTION
 
     If a Bond is sold, the seller will recognize gain or loss equal to the
difference between the amount realized on the sale and the seller's adjusted
basis in the Bond. Such adjusted basis generally will equal the cost of the Bond
to the seller, increased by any original issue discount and market discount
included in the seller's gross income with respect to the Bond and reduced by
payments, other than payments of qualified stated interest, previously received
by the seller and by any amortized premium. If a Bondholder is a bank, thrift or
similar institution described in Section 582(c) of the Code, gain or loss
realized on the sale or exchange of a Bond will be taxable as ordinary income or
loss. Any such gain or loss recognized by any other seller will be capital gain
or loss, provided that the Bond is held by the seller as a "capital asset"
(generally, property held for investment) within the meaning of Code Section
1221.
 
MARKET DISCOUNT
 
     The Bonds are subject to the market discount provisions of Code Sections
1276 through 1278. These rules provide that if a subsequent holder of a Bond
purchases it at a market discount, some or all of any principal payment or of
any gain recognized upon the disposition of the Bond will be taxable as ordinary
interest income. Market discount on a Bond means the excess, if any, of (1) the
sum of its issue price and the aggregate amount of original issue discount
includible in the gross income of all holders of the Bond prior to the
acquisition by the subsequent holder (presumably adjusted to reflect prior
principal payments), over (2) the price paid by the holder for the Bond. Market
discount on a Bond will be considered to be zero if such discount is less than
 .25% of the stated redemption price at maturity of such Bond multiplied by its
weighted average life, which presumably would be calculated in a manner similar
to weighted average life (described above), taking into account distributions
(including prepayments) prior to the date of acquisition of such Bond by the
subsequent purchaser. If market discount on a Bond is treated as zero under this
rule, the actual amount of such discount must be allocated to the remaining
principal distributions on such Bond and when each such distribution is made,
gain equal to the discount allocated to such distribution will be recognized.
 
     Any principal payment (whether a scheduled payment or a prepayment) or any
gain on the disposition of a market discount bond is to be treated as ordinary
income to the extent that it does not exceed the accrued market discount at the
time of such payment or disposition. The amount of accrued market discount for
purposes of determining the tax treatment of subsequent principal payments or
dispositions of the Bonds is to be reduced by the amount so treated as ordinary
income.
 
     The Tax Reform Act of 1986 grants authority to the U.S. Treasury to issue
regulations providing for the computation of accrued market discount on debt
instruments, the principal of which is payable in more than one installment.
Until such time as regulations are issued by the U.S. Treasury, certain rules
described in the legislative history accompanying the Tax Reform Act of 1986
will apply. Under those rules, the holder of a market discount bond may elect to
accrue market discount either on the basis of a constant interest rate or using
one of the following methods. For bonds issued with original issue discount, the
amount of market discount that accrues during a period is equal to the product
of (i) the total remaining market discount, multiplied by (ii) a fraction, the
numerator of which is the original issue discount accruing during the period and
the denominator of which is the total remaining original issue discount at the
beginning of the period. For bonds issued without original issue discount, the
amount of market discount that accrues during a period is equal to the product
of (i) the total remaining market discount, multiplied by (ii) a fraction, the
numerator of which is the amount of stated interest paid during the accrual
period and the denominator of which is the total amount of stated interest
remaining to be paid at the beginning of the period. For purposes of calculating
market discount under any of the above methods in the case of instruments (such
as the Bonds) that provide for payments that may be accelerated by reason of
prepayments of other obligations securing such instruments, the same prepayment
assumption applicable to calculating the accrual of original issue discount
shall apply. Regulations are to provide similar rules for computing the accrual
of amortizable bond premium on instruments payable in more than one principal
installment. As an alternative to the inclusion of market discount in income on
the foregoing basis, the holder may elect to include such market discount in
income currently as it accrues on all market discount instruments acquired by
such holder in that taxable year or thereafter. In addition, accrual method
holders may elect to accrue all interest on a Bond, including de
 
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<PAGE>   139
 
minimis original issue discount and market discount and as adjusted by any
premium, under a constant yield method.
 
     A subsequent holder of a Bond who acquired the Bond at a market discount
also may be required to defer, until the maturity date of the Bond or the
earlier disposition of the Bond in a taxable transaction, the deduction of a
portion of the amount of interest that the holder paid or accrued during the
taxable year on indebtedness incurred or maintained to purchase or carry the
Bond in excess of the aggregate amount of interest (including original issue
discount) includible in his or her gross income for the taxable year with
respect to such Bond. The amount of such net interest expense deferred in a
taxable year may not exceed the amount of market discount accrued on the Bond
for the days during the taxable year on which the subsequent holder held the
Bond, and the amount of such deferred deduction to be taken into account in the
taxable year in which the Bond is disposed of in a transaction in which gain or
loss is not recognized in whole or in part is limited to the amount of gain
recognized on the disposition. This deferral rule does not apply to a holder
that elects to include market discount in income currently as it accrues on all
market discount instruments acquired by such holder in that taxable year or
thereafter.
 
     Because the regulations described above with respect to market discounts
and premiums have not been issued, it is impossible to predict what effect those
regulations might have on the tax treatment of a Bond purchased at a discount or
premium in the secondary market.
 
WITHHOLDING WITH RESPECT TO CERTAIN FOREIGN INVESTORS
 
     Pursuant to Code Sections 871(h), 881(c), 1441(c)(9) and 1442(a), interest
and original issue discount income received with respect to the Bonds by
Bondholders who are nonresident alien individuals, foreign corporations or other
non-United States persons unrelated to the Issuer ("foreign persons") generally
will not be subject to the 30% withholding tax imposed by Code Sections 1441 and
1442 on certain income of foreign persons, provided the procedural requirements
of Code Section 871(h)(5) are met. The 30% withholding tax will apply, however,
in certain situations where contingent interest is paid or the IRS determines
that withholding is required in order to prevent tax evasion by United States
persons.
 
     If the 30% withholding tax is applicable, interest payments made to
Bondholders who are foreign persons will be subject to withholding. In addition,
a tax equal to 30% of the original issue discount accrued with respect to a Bond
since the last payment of interest thereon will be withheld from each interest
payment made to a foreign person. The Code provides, for purposes of determining
the amount of original issue discount subject to the withholding tax on foreign
persons, that original issue discount shall accrue at a constant interest rate
pursuant to the rules applicable to United States persons described above,
rather than on a straight-line basis as under previous law.
 
     Bondholders to whom withholding with respect to foreign persons applies
also will be subject to a 30% tax on a portion of the gain, if any, recognized
upon the payment by the Issuer of principal on a Bond or upon the sale or
exchange of a Bond. Code Sections 871 and 881 provide, for purposes of
determining the amount of original issue discount subject to the withholding
tax, that the 30% tax will apply to the amount of gain not in excess of the
original issue discount that accrued, on a constant interest basis, while the
foreign person held the Bond (reduced by the accrued original issue discount on
account of which the tax had already been withheld).
 
     The 30% withholding tax imposed on a foreign person is subject to reduction
or elimination under applicable tax treaties and does not apply if the interest,
original issue discount or gain treated as ordinary income, as the case may be,
is effectively connected with the conduct by such foreign person of a trade or
business within the United States. Foreign persons who hold a Bond should
consult their tax advisors regarding their qualification for reduced rate of, or
exemption from, withholding and the procedure for obtaining such a reduction or
exemption.
 
BACKUP WITHHOLDING
 
     Federal income tax law provides for "backup withholding" of tax at a rate
of 31% in certain circumstances on "reportable payments," which include payments
of principal, interest and original issue
 
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<PAGE>   140
 
discount (determined in any case as if the Bondholder were the original holder
of the Bond), but not market discount, on a Bond and of the proceeds of the
disposition of a Bond. Persons subject to the requirement to backup withhold
include, in certain circumstances, the Issuer, the paying agent of the Issuer, a
person who collects a payment of interest or original issue discount as a
custodian or nominee on behalf of the Bondholder, and a "broker" (as defined in
applicable Treasury regulations) through which the Bondholder receives the
proceeds of the retirement or other disposition of a Bond. Backup withholding
applies only if the Bondholder, among other things, (1) fails to furnish a
social security number or other taxpayer identification number ("TIN") to the
person subject to the requirement to backup withhold, (2) furnishes an incorrect
TIN to such person, (3) fails to report properly interest or dividends or (4)
under certain circumstances, fails to provide to such person a certified
statement, signed under penalty of perjury, that the TIN furnished is the
correct number and that such Bondholder is not subject to backup withholding.
 
     Backup withholding will not apply, however, with respect to certain
payments made to Bondholders, including payments to certain exempt recipients
(such as corporations and tax-exempt organizations) and to certain foreign
persons. Bondholders should consult their tax advisors regarding their
qualification for exemption from backup withholding and the procedure for
obtaining such an exemption.
 
     Each Issuer will report to the Bondholders and the IRS for each calendar
year the amount of any "reportable payments" by the Issuer during such year and
the amount of tax withheld, if any, with respect to payments on the Bonds issued
by it.
 
     DUE TO THE COMPLEXITY OF THE FEDERAL INCOME TAX RULES APPLICABLE TO
BONDHOLDERS AND THE CONSIDERABLE UNCERTAINTY THAT EXISTS WITH RESPECT TO MANY
ASPECTS OF THOSE RULES, POTENTIAL INVESTORS SHOULD CONSULT THEIR OWN TAX
ADVISORS REGARDING THE TAX TREATMENT OF THE ACQUISITION, OWNERSHIP, AND
DISPOSITION OF THE BONDS.
 
                            STATE TAX CONSIDERATIONS
 
     In addition to the federal income tax consequences described above under
"FEDERAL INCOME TAX CONSEQUENCES," potential investors should consider the state
income tax consequences of the acquisition, ownership, and disposition of the
Bonds. State income tax law may differ substantially from the corresponding
federal law, and this discussion does not purport to describe any aspect of the
income tax laws of any state. Therefore, potential investors should consult
their own tax advisors with respect to the various state tax consequences of an
investment in the Bonds.
 
                                LEGAL INVESTMENT
 
     The Prospectus Supplement for each Series of Bonds will specify which, if
any, of the Classes of Bonds offered thereby will constitute "mortgage related
securities" for purposes of SMMEA. Classes of Bonds that qualify as "mortgage
related securities" will be legal investments for persons, trusts, corporations,
partnerships, associations, business trusts and business entities (including
depository institutions, life insurance companies and pension funds) created
pursuant to or existing under the laws of the United States or any state
(including the District of Columbia and Puerto Rico) whose authorized
investments are subject to state regulation to the same extent as, under
applicable law, obligations issued by or guaranteed as to principal and interest
by the United States or any such entities. Under SMMEA, if a state enacts
legislation prior to October 4, 1991 specifically limiting the legal investment
authority of any of such entities with respect to "mortgage related securities,"
the Bonds will constitute legal investments for entities subject to such
legislation only to the extent provided therein. Approximately twenty-one states
adopted such legislation prior to the October 4, 1991 deadline. SMMEA provides,
however, that in no event will the enactment of any such legislation affect the
validity of any contractual commitment to purchase, hold or invest in Bonds, or
require the sale or other disposition of Bonds, so long as such contractual
commitment was made or such Bonds were acquired prior to the enactment of such
legislation.
 
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<PAGE>   141
 
     SMMEA also amended the legal investment authority of federally-chartered
depository institutions as follows: federal savings and loan associations and
federal savings banks may invest in, sell or otherwise deal in Bonds without
limitations as to the percentage of their assets represented thereby, federal
credit unions may invest in mortgage related securities, and national banks may
purchase Bonds for their own account without regard to the limitations generally
applicable to investment securities set forth in 12 U.S.C. 24 (Seventh), subject
in each case to such regulations as the applicable federal authority may
prescribe. In this connection, federal credit unions should review the National
Credit Union Administration ("NCUA") Letter to Credit Unions No. 96, as modified
by Letter to Credit Unions No. 108, which includes guidelines to assist federal
credit unions in making investment decisions for mortgage related securities,
and the NCUA's regulation "Investment and Deposit Activities" (12 C.F.R. Part
703) (whether or not the Class of Bonds under consideration for purchase
constitutes a "mortgage related security").
 
     All depository institutions considering an investment in the Bonds (whether
or not the Class of Bonds under consideration for purchase constitutes a
"mortgage related security") should review the Federal Financial Institutions
Examination Council's Supervisory Policy Statement on Securities Activities (to
the extent adopted by their respective regulators) (the "Policy Statement"),
setting forth, in relevant part, certain securities trading and sales practices
deemed unsuitable for an institution's investment portfolio, and guidelines for
(and restrictions on) investing in mortgage derivative products, including
"mortgage related securities" that are "high-risk mortgage securities" as
defined in the Policy Statement. According to the Policy Statement, such
"high-risk mortgage securities" include securities such as Bonds not entitled to
distributions allocated to principal or interest, or Subordinated Bonds. Under
the Policy Statement, it is the responsibility of each depository institution to
determine, prior to purchase (and at stated intervals thereafter), whether a
particular mortgage derivative product is a "high-risk mortgage security," and
whether the purchase (or retention) of such a product would be consistent with
the Policy Statement.
 
     The foregoing does not take into consideration the applicability of
statutes, rules, regulations, orders, guidelines, or agreements generally
governing investments made by a particular investor, including, but not limited
to, "prudent investor" provisions, percentage-of-assets limits and provisions
that may restrict or prohibit investment in securities that are not "interest
bearing" or "income paying."
 
     There may be other restrictions on the ability of certain investors,
including depository institutions, either to purchase Bonds or to purchase Bonds
representing more than a specified percentage of the investor's assets.
Investors should consult their own legal advisors in determining whether and to
what extent the Bonds constitute legal investments for such investors.
 
                                 ERISA MATTERS
 
GENERAL
 
     The Employee Retirement Income Security Act of 1974, as amended ("ERISA")
and section 4975 of the Code impose certain restrictions on employee benefit
plans subject to ERISA or plans or arrangements subject to Section 4975 of the
Code ("Plans") and on persons who are parties in interest or disqualified
persons ("parties in interest") with respect to such Plans. Certain employee
benefit plans, such as governmental plans and church plans (if no election has
been made under section 410(d) of the Code), are not subject to the restrictions
of ERISA, and assets of such plans may be invested in the Bonds without regard
to the ERISA considerations described below, subject to other applicable federal
and state law. However, any such governmental or church plan which is qualified
under section 401(a) of the Code and exempt from taxation under section 501(a)
of the Code is subject to the prohibited transaction rules set forth in section
503 of the Code. Any Plan fiduciary which proposes to cause a Plan to acquire
any of the Bonds should consult with its counsel with respect to the potential
consequences under ERISA, and the Code, of the Plan's acquisition and ownership
of the Bonds. Investments by Plans are also subject to ERISA's general fiduciary
requirements, including the requirement of investment prudence and
diversification and the requirement that a Plan's investments be made in
accordance with the documents governing the Plan.
 
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<PAGE>   142
 
PROHIBITED TRANSACTIONS
 
     GENERAL.  Section 406 of ERISA prohibits parties in interest with respect
to a Plan from engaging in certain transactions (including loans) involving a
Plan and its assets unless a statutory or administrative exemption applies to
the transaction. Section 4975 of the Code imposes certain excise taxes (or, in
some cases, a civil penalty may be assessed pursuant to section 502(i) of ERISA)
on parties in interest which engage in non-exempt prohibited transactions.
 
     PLAN ASSET REGULATION.  The United States Department of Labor ("Labor") has
issued final regulations concerning the definition of what constitutes the
assets of a Plan for purposes of ERISA and the prohibited transaction provisions
of the Code (the "Plan Asset Regulation"). The Plan Asset Regulation describes
the circumstances under which the assets of an entity in which a Plan invests
will be considered to be "plan assets" such that any person who exercises
control over such assets would be subject to ERISA's fiduciary standards. Under
the Plan Asset Regulation, generally when a Plan invests in another entity, the
Plan's assets do not include, solely by reason of such investment, any of the
underlying assets of the entity. However, the Plan Asset Regulation provides
that, if a Plan acquires an "equity interest" in an entity that is neither a
"publicly-offered security" (as defined therein) nor a security issued by an
investment company registered under the Investment Company Act of 1940, the
assets of the entity will be treated as assets of the Plan investor unless
certain exceptions apply. If the Bonds were deemed to be equity interests and no
statutory, regulatory or administrative exemption applies, the Issuer could be
considered to hold plan assets by reason of a Plan's investment in the Bonds.
Such plan assets would include an undivided interest in any assets held by the
Issuer. In such an event, the Bond Trustee and other persons, in providing
services with respect to the Issuer's assets, may be parties in interest with
respect to such Plans, subject to the fiduciary responsibility provisions of
Title I of ERISA, including the prohibited transaction provisions of section 406
of ERISA, and section 4975 of the Code with respect to transactions involving
the Issuer's assets. Under the Plan Asset Regulation, the term "equity interest"
is defined as any interest in an entity other than an instrument that is treated
as indebtedness under "applicable local law" and which has no "substantial
equity features." Although the Plan Assets Regulation is silent with respect to
the question of which law constitutes "applicable local law" for this purpose,
Labor has stated that this determination should be made under the state law
governing interpretation of the instrument in question. In the preamble to the
Plan Assets Regulation, Labor declined to provide a precise definition of what
features are equity features or the circumstances under which such features
would be considered "substantial," noting that the question of whether a plan's
interest has substantial equity features is an inherently factual one, but that
in making a determination it would be appropriate to take into account whether
the equity features are such that a Plan's investment would be a practical
vehicle for the indirect provision of investment management services. If the
Bonds are deemed to be equity interests in the Issuer and no statutory,
regulatory or administrative exemption applies, the Issuer could be considered
to hold plan assets by reason of a Plan's investment in the Bonds. Those
exemptions potentially include Prohibited Transaction Class Exemption ("PTCE")
90-1, regarding investments by insurance company pooled separate accounts, PTCE
91-38, regarding investments by bank collective investment funds, PTCE 84-14,
regarding transactions effected by a "qualified professional asset manager,"
PTCE 95-60, regarding investments by insurance company general accounts, or PTCE
96-23, regarding transactions effected by an "in-house asset manager".
 
     REVIEW BY PLAN FIDUCIARIES.  Any Plan fiduciary considering whether to
purchase any Bonds on behalf of a Plan should consult with its counsel regarding
the applicability of the fiduciary responsibility and prohibited transaction
provisions of ERISA and the Code to such investment. Among other things, before
purchasing any Bonds, a fiduciary of a Plan should make its own determination as
to whether the Issuer, as obligor on the Bonds, is a party in interest with
respect to the Plan, the availability of the exemptive relief provided in the
Plan Asset Regulations and the availability of any other prohibited transaction
exemptions.
 
                                     RATING
 
     It is a condition to the issuance of the Bonds of each Series offered
hereby and by the Prospectus Supplement that they shall have been rated in one
of the four highest rating categories by the nationally
 
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<PAGE>   143
 
recognized statistical rating agency or agencies (each, a "Rating Agency")
specified in the related Prospectus Supplement.
 
     Any such rating would be based on, among other things, the adequacy of the
value of the Mortgage Collateral securing a Series of Bonds and any credit
enhancement with respect to such Class and will reflect such Rating Agency's
assessment solely of the likelihood that holders of a Class of Bonds will
receive payments to which such Bondholders are entitled under the related Bond.
Such rating will not constitute an assessment of the likelihood that principal
prepayments on the related Mortgage Collateral will be made, the degree to which
the rate of such prepayments might differ from that originally anticipated or
the likelihood of early optional termination of the Series of Bonds. Such rating
should not be deemed a recommendation to purchase, hold or sell Bonds, inasmuch
as it does not address market price or suitability for a particular investor.
Each security rating should be evaluated independently of any other security
rating. Such rating will not address the possibility that prepayment at higher
or lower rates than anticipated by an investor may cause such investor to
experience a lower than anticipated yield or that an investor purchasing a
security at a significant premium might fail to recoup its initial investment
under certain prepayment scenarios.
 
     There is also no assurance that any such rating will remain in effect for
any given period of time or that it may not be lowered or withdrawn entirely by
the applicable Rating Agency in the future if in its judgment circumstances in
the future so warrant. In addition to being lowered or withdrawn due to any
erosion in the adequacy of the value of the Mortgage Collateral securing a
Series of Bonds or any credit enhancement with respect to a Series of Bonds,
such rating might also be lowered or withdrawn among other reasons, because of
an adverse change in the financial or other condition of a credit enhancement
provider or a change in the rating of such credit enhancement provider's long
term debt.
 
     The amount, type and nature of credit enhancement, if any, established with
respect to a Series of Bonds will be determined on the basis of criteria
established by each Rating Agency rating Classes of such Series of Bonds. Such
criteria are sometimes based upon an actuarial analysis of the behavior of
mortgage loans in a larger group. Such analysis is often the basis upon which
each Rating Agency determines the amount of credit enhancement required with
respect to each such Class. There can be no assurance that the historical data
supporting any such actuarial analysis will accurately reflect future experience
nor any assurance that the data derived from a large actuarial analysis will
accurately reflect future experience nor any assurance that the data derived
from a large pool of mortgage loans accurately predicts the delinquency,
foreclosure or loss experience of any particular pool of Mortgage Collateral. No
assurance can be given that values of any Mortgaged Properties or mortgaged
properties securing the mortgage loans underlying any Certificates, as the case
may be, have remained or will remain at their levels on the respective dates of
origination of the related mortgage loans. If the residential real estate
markets should experience an overall decline in property values such that the
outstanding principal balances of the Mortgage Collateral securing a particular
Series of Bonds and any secondary financing on the related Mortgaged Properties
become equal to or greater than the value of the Mortgaged Properties or
mortgaged properties securing the mortgage loans underlying any Certificates, as
the case may be, the rates of delinquencies, foreclosures and losses could be
higher than those now generally experienced in the mortgage lending industry. In
addition, adverse economic conditions (which may or may not affect real property
values) may affect the timely payment by mortgagors of scheduled payments of
principal and interest on the Mortgage Collateral and, accordingly, the rates of
delinquencies, foreclosures and losses with respect to any Mortgage Collateral
securing a particular Series of Bonds. To the extent that such losses are not
covered by credit enhancement, such losses will be borne, at least in part, by
the holders of one or more Classes of Bonds.
 
                                       83
<PAGE>   144
 
                              PLAN OF DISTRIBUTION
 
     The Issuer may sell the Bonds offered hereby either directly or through an
underwriter or underwriters or through underwriting syndicates managed by an
underwriter or underwriters. The Prospectus Supplement for each Series will set
forth the terms of the offering of such Series and of each Class within such
Series, including the name or names of the underwriters, the proceeds to and
their use by the Issuer, and either the initial public offering price, the
discounts and commissions to the underwriters and any discounts or concessions
allowed or reallowed to certain dealers or the method by which the price at
which the underwriters will sell the Bonds will be determined.
 
     The Bonds of a Series may be acquired by underwriters for their own account
and may be resold from time to time in one or more transactions, including
negotiated transactions, at a fixed public offering price or at varying prices
determined at the time of sale. The obligations of any underwriters will be
subject to certain conditions precedent, and such underwriters will be severally
obligated to purchase all the Bonds of a Series described in the related
Prospectus Supplement, if any are purchased. If Bonds of a Series are offered
other than through underwriters, the related Prospectus Supplement will contain
information regarding the nature of such offering and any agreements to be
entered into between the Issuer and purchasers of Bonds of such Series.
 
     The place and time of delivery for the Bonds of a Series in respect of
which this Prospectus is delivered will be set forth in the related Prospectus
Supplement.
 
                                 LEGAL MATTERS
 
     The validity of the Bonds will be passed upon for the Issuer by Tobin &
Tobin, a professional corporation, San Francisco, California. Certain tax
matters will be passed upon by Giancarlo & Gnazzo, A Professional Corporation,
San Francisco, California. Brown & Wood LLP, New York, New York will act as
counsel for the underwriters.
 
                                       84
<PAGE>   145
 
                          INDEX OF CERTAIN DEFINITIONS
 
     Set forth below is a list of certain terms used in this Prospectus,
together with the pages on which the terms are defined herein.
 
<TABLE>
<S>                                                                                    <C>
Accrual Period.......................................................................      76
Advance..............................................................................      16
Agency Securities....................................................................    1, 4
Assumed Reinvestment Rate............................................................      31
Available Funds......................................................................   6, 31
Balloon payments.....................................................................   9, 39
Bankruptcy Bond......................................................................  14, 53
Basic Principal Payment..............................................................       6
Belgian Cooperative..................................................................      36
Beneficial owner.....................................................................      34
Bond Account.........................................................................      12
Bond Distribution Amount.............................................................      12
Bond Insurance Policy................................................................      14
Bond Insurer.........................................................................      61
Bond Owners..........................................................................      34
Bond Trustee.........................................................................   4, 26
Bond Value...........................................................................       7
Bond Values..........................................................................       6
Bondholders..........................................................................   4, 35
Bonds................................................................................    1, 4
Book-Entry Bonds.....................................................................      34
Buydown Fund.........................................................................      39
Buydown Loans........................................................................      39
Capitalized Interest Account.........................................................      49
CEDEL Participants...................................................................      36
CERCLA...............................................................................  20, 70
Certificates.........................................................................    1, 4
Closing Date.........................................................................      12
Code............................................................................5, 18, 26, 74
Collateral...........................................................................      37
Collateral Group.....................................................................      32
Commission...........................................................................       2
Company..............................................................................  1, 5, 26
Controlling Class....................................................................      63
Conventional Loans...................................................................      33
Cooperative Loans....................................................................   9, 41
Cooperatives.........................................................................   9, 41
Custodial Account....................................................................      56
Cut-off Date.........................................................................      14
Deferred Interest Bonds..............................................................      30
Definitive Bond......................................................................      35
Depositor............................................................................   5, 26
Detailed Description.................................................................      38
Distribution Account.................................................................      12
Distribution Account Deposit Date....................................................  12, 48
</TABLE>
 
                                       85
<PAGE>   146
 
<TABLE>
<S>                                                                                    <C>
DTC..................................................................................  22, 34
Due Period...........................................................................       6
Eligible Account.....................................................................      57
Eligible Substitute Pledged Mortgage.................................................      41
EPA..................................................................................      71
ERISA................................................................................  17, 81
Euroclear Operator...................................................................      36
Euroclear Participants...............................................................      36
European Depositaries................................................................      34
Event of Default.....................................................................      63
Excess Spread........................................................................      54
Exchange Act.........................................................................       3
FHA Loans............................................................................      42
FHLMC................................................................................    1, 4
FHLMC Act............................................................................      44
FHLMC Certificates...................................................................  10, 41
Financial Intermediary...............................................................      35
Fixed Rate Pledged Mortgages.........................................................    1, 4
Floating Rate Bonds..................................................................      31
Floating Rate Pledged Mortgages......................................................    1, 4
FNMA.................................................................................    1, 4
FNMA Certificates....................................................................  10, 41
Funding Period.......................................................................  13, 25
Garn-St Germain Act..................................................................      72
GNMA.................................................................................    1, 4
GNMA Certificates....................................................................  10, 41
GNMA I Certificate...................................................................      42
GNMA II Certificate..................................................................      42
GNMA Issuer..........................................................................      42
Guaranteed Mortgage Pass-Through Certificates........................................  10, 41
Guaranty Agreement...................................................................      42
Housing Act..........................................................................      42
Indenture............................................................................      26
Insurance Proceeds...................................................................      37
IRS..................................................................................      75
Issuer...............................................................................   1, 26
L/C Bank.............................................................................  15, 54
L/C Percentage.......................................................................  15, 54
Labor................................................................................      82
Liquidated Mortgage..................................................................      59
Liquidation Proceeds.................................................................      37
Lockout periods......................................................................  10, 39
Master Servicer......................................................................       5
Master Servicing Agreement...........................................................   5, 56
Master Servicing Fee.................................................................      59
Moody's..............................................................................      48
Morgan...............................................................................      36
Mortgage Collateral..................................................................    1, 4
Mortgage Note........................................................................       9
</TABLE>
 
                                       86
<PAGE>   147
 
<TABLE>
<S>                                                                                    <C>
Mortgage Pool Insurance Policy.......................................................  14, 51
Mortgage Rate........................................................................       9
Mortgaged Property...................................................................  10, 38
Mortgagor............................................................................      29
NCUA.................................................................................      81
OID Regulations......................................................................      73
Owner Trustee........................................................................   5, 26
Parties in interest..................................................................      81
Payment Date.........................................................................       5
Permitted Investments................................................................      48
Plan Asset Regulation................................................................      82
Plans................................................................................      81
Pledged Mortgages....................................................................    1, 4
PMBS Agreement.......................................................................      46
PMBS Issuer..........................................................................  11, 46
PMBS Servicer........................................................................  12, 46
PMBS Trustee.........................................................................  12, 46
Policy Statement.....................................................................      81
Pool Insurer.........................................................................      51
Pre-Funded Amount....................................................................      25
Pre-Funding Account..................................................................  13, 25
Primary Mortgage Insurance Policy....................................................      38
Private Mortgage-Backed Securities...................................................       4
PTCE.................................................................................      82
Purchase Price.......................................................................      29
Qualified REIT subsidiary............................................................      26
Rating Agency........................................................................   7, 83
RCRA.................................................................................      72
Record Date..........................................................................       5
Redwood Trust........................................................................   5, 26
REIT.................................................................................  17, 26
REMIC................................................................................      74
Relevant Depositary..................................................................      34
Relief Act...........................................................................      73
Remittance Date......................................................................      39
Reserve Fund.........................................................................      51
Rules................................................................................      35
Securities Act.......................................................................       2
Seller...............................................................................      27
Senior Bondholders...................................................................  13, 50
Senior Bonds.........................................................................       4
Senior Liens.........................................................................      40
Servicer.............................................................................   5, 56
Servicers............................................................................      40
Servicing Agreement..................................................................      56
Servicing Default....................................................................      62
SMMEA................................................................................      17
Special Hazard Insurance Policy......................................................      14
Special Hazard Insurer...............................................................      52
</TABLE>
 
                                       87
<PAGE>   148
 
<TABLE>
<S>                                                                                    <C>
Special Servicer.....................................................................       5
Special Servicing Agreement..........................................................      61
Spread...............................................................................       6
Stand-by Master Servicer.............................................................      61
Subordinated Bondholders.............................................................  13, 50
Subordinated Bonds...................................................................       4
Subsequent Mortgage Collateral.......................................................      25
Substitute Collateral................................................................      47
Successor Master Servicer............................................................      61
Tax Prepayment Assumption............................................................      76
Terms and Conditions.................................................................      36
TIN..................................................................................      80
TMP..................................................................................      74
Title V..............................................................................      73
UCC..................................................................................      69
VA Loans.............................................................................      42
</TABLE>
 
                                       88
<PAGE>   149
 
======================================================
 
    NO PERSON HAS BEEN AUTHORIZED TO GIVE ANY INFORMATION OR TO MAKE ANY
REPRESENTATIONS OTHER THAN THOSE CONTAINED IN THIS PROSPECTUS SUPPLEMENT OR THE
PROSPECTUS AND, IF GIVEN OR MADE, SUCH INFORMATION OR REPRESENTATIONS MUST NOT
BE RELIED UPON. THIS PROSPECTUS SUPPLEMENT AND THE PROSPECTUS DO NOT CONSTITUTE
AN OFFER TO SELL OR A SOLICITATION OF AN OFFER TO BUY ANY OF THE SECURITIES
OFFERED HEREBY, NOR AN OFFER OF BONDS IN ANY STATE OR JURISDICTION IN WHICH, OR
TO ANY PERSON TO WHOM, SUCH OFFER WOULD BE UNLAWFUL. THE DELIVERY OF THIS
PROSPECTUS SUPPLEMENT OR THE PROSPECTUS AT ANY TIME DOES NOT IMPLY THAT THE
INFORMATION CONTAINED HEREIN OR THEREIN IS CORRECT AS OF ANY TIME SUBSEQUENT TO
ITS DATE; HOWEVER, IF ANY MATERIAL CHANGE OCCURS WHILE THIS PROSPECTUS
SUPPLEMENT OR THE PROSPECTUS IS REQUIRED BY LAW TO BE DELIVERED, THIS PROSPECTUS
SUPPLEMENT OR THE PROSPECTUS WILL BE AMENDED OR SUPPLEMENTED ACCORDINGLY.
                            ------------------------
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                            PAGE
                                            ----
<S>                                         <C>
             PROSPECTUS SUPPLEMENT
Incorporation of Certain Documents by
  Reference...............................   S-2
Summary...................................   S-3
Risk Factors..............................  S-13
The Issuer................................  S-15
Description of the Bonds..................  S-16
Security for the Bonds....................  S-33
Servicing of the Pledged Mortgages........  S-46
Use of Proceeds...........................  S-49
Federal Income Tax Consequences...........  S-50
ERISA Matters.............................  S-50
Method of Distribution....................  S-51
Experts...................................  S-51
Legal Matters.............................  S-51
Ratings...................................  S-52
Index of Certain Definitions..............  S-53
                   PROSPECTUS
Prospectus Supplement.....................     2
Available Information.....................     2
Incorporation of Certain Documents by
  Reference...............................     3
Summary...................................     4
Risk Factors..............................    19
Introduction..............................    26
The Issuer................................    26
Use of Proceeds...........................    27
Mortgage Loan Program.....................    27
Description of the Bonds..................    30
Security for the Bonds....................    37
Credit Enhancement........................    49
Servicing of the Pledged Mortgages........    56
The Indenture.............................    63
Certain Legal Aspects of Pledged
  Mortgages...............................    66
Federal Income Tax Consequences...........    73
State Tax Considerations..................    80
Legal Investment..........................    80
ERISA Matters.............................    81
Rating....................................    82
Plan of Distribution......................    84
Legal Matters.............................    84
Index of Certain Definitions..............    85
</TABLE>
 
    UNTIL 90 DAYS AFTER THE DATE OF THIS PROSPECTUS SUPPLEMENT, ALL DEALERS
EFFECTING TRANSACTIONS IN THE BONDS, WHETHER OR NOT PARTICIPATING IN THIS
DISTRIBUTION, MAY BE REQUIRED TO DELIVER A PROSPECTUS SUPPLEMENT AND PROSPECTUS.
THIS IS IN ADDITION TO THE OBLIGATION OF DEALERS TO DELIVER A PROSPECTUS
SUPPLEMENT AND PROSPECTUS WHEN ACTING AS UNDERWRITERS AND WITH RESPECT TO THEIR
UNSOLD ALLOTMENTS OR SUBSCRIPTIONS.
======================================================
======================================================
 
                                  $534,347,000
                            SEQUOIA MORTGAGE TRUST 1
                         COLLATERALIZED MORTGAGE BONDS
                  -------------------------------------------
                             PROSPECTUS SUPPLEMENT
                                 July 25, 1997
                   ------------------------------------------
                                LEHMAN BROTHERS
======================================================


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