PRUDENTIAL HOME MORTGAGE SECURITIES COMPANY INC
424B5, 1996-04-19
MORTGAGE BANKERS & LOAN CORRESPONDENTS
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<PAGE>
SUPPLEMENT
(TO PROSPECTUS SUPPLEMENT DATED APRIL 14, 1992 AND PROSPECTUS DATED APRIL 8,
1992)
 
THE PRUDENTIAL HOME MORTGAGE SECURITIES COMPANY, INC. [LOGO]
 
                                     SELLER
 
               MORTGAGE PASS-THROUGH CERTIFICATES, SERIES 1992-13
                INTEREST PAYABLE MONTHLY, COMMENCING IN MAY 1996
 
                    VARIABLE RATE(1) CLASS A-10 CERTIFICATES
                     (1) ON THE CLASS A-10 NOTIONAL AMOUNT
                              -------------------
 
    The  Series 1992-13 Mortgage Pass-Through  Certificates (the "Series 1992-13
Certificates") are the Series 1992-13 Certificates described in the accompanying
Prospectus Supplement dated April 14, 1992 (the "Prospectus Supplement") and the
accompanying Prospectus  dated  April 8,  1992  (the "Prospectus").  The  Series
1992-13  Certificates consist of one class  of senior certificates (the "Class A
Certificates") and  two  classes  of subordinated  certificates  (the  "Class  M
Certificates"   and  "Class   B  Certificates,"   respectively).  The   Class  A
Certificates consist of eleven subclasses  (each, a "Subclass") of  Certificates
designated  as the Class A-1, Class A-2,  Class A-3, Class A-4, Class A-5, Class
A-6, Class A-7, Class A-8, Class A-9, Class A-10 and Class A-R Certificates. The
Class M Certificates are not divided  into subclasses. The Class B  Certificates
consist  of four subclasses  of Certificates designated as  the Class B-1, Class
B-2, Class B-3 and Class B-4 Certificates. Only the Class A-10 Certificates  are
being  offered hereby. The Series 1992-13 Certificates evidence in the aggregate
the entire beneficial ownership  interest in a trust  fund (the "Trust  Estate")
established  by  The  Prudential  Home Mortgage  Securities  Company,  Inc. (the
"Seller") and consisting of a pool of fixed interest rate, conventional, monthly
pay, fully amortizing,  one- to  four-family, residential  first mortgage  loans
having  original  terms  to  stated  maturity  of  approximately  15  years (the
"Mortgage Loans"), together  with certain related  property. The Mortgage  Loans
are  serviced by The Prudential Home Mortgage  Company, Inc. (in its capacity as
servicer, the "Servicer,"  otherwise "PHMC"). See  "Description of the  Mortgage
Loans"  herein and  in the Prospectus  Supplement and "Risk  Factors and Special
Considerations" herein.
 
    PROSPECTIVE INVESTORS IN  THE CLASS  A-10 CERTIFICATES  SHOULD CONSIDER  THE
FACTORS DISCUSSED UNDER "RISK FACTORS AND SPECIAL CONSIDERATIONS" HEREIN ON PAGE
S1-3.
 
    The  credit  enhancement for  the  Series 1992-13  Certificates  is provided
through the  use of  a "shifting  interest" type  subordination, which  has  the
effect  of allocating all or a  disproportionate amount of principal prepayments
and other unscheduled receipts of principal  to the Class A Certificates for  at
least  nine  years  beginning  on  the  first  Distribution  Date.  See "Summary
Information--Credit Enhancement"  and "--Effects  of Prepayments  on  Investment
Expectations,"  "Description  of  the Certificates"  and  "Prepayment  and Yield
Considerations" in the Prospectus Supplement.
 
    THE YIELD  TO  MATURITY  OF  THE CLASS  A-10  CERTIFICATES  WILL  BE  HIGHLY
SENSITIVE  TO THE RATE AND TIMING  OF PRINCIPAL PAYMENTS (INCLUDING PREPAYMENTS)
ON THE  MORTGAGE  LOANS, WHICH  MAY  BE PREPAID  AT  ANY TIME  WITHOUT  PENALTY.
INVESTORS  SHOULD CONSIDER THE  ASSOCIATED RISKS THAT  A FASTER THAN ANTICIPATED
RATE OF  PRINCIPAL  PAYMENTS  (INCLUDING PREPAYMENTS)  ON  THE  MORTGAGE  LOANS,
PARTICULARLY  THOSE MORTGAGE LOANS WITH A  HIGHER RATE OF INTEREST, COULD RESULT
IN AN ACTUAL  YIELD THAT  IS LOWER  THAN ANTICIPATED AND  THAT A  RAPID RATE  OF
PAYMENTS  IN RESPECT  OF PRINCIPAL (INCLUDING  PREPAYMENTS) COULD  RESULT IN THE
FAILURE  OF  INVESTORS   TO  FULLY  RECOVER   THEIR  INITIAL  INVESTMENTS.   See
"Sensitivity  of the Pre-Tax Yield  and Weighted Average Life  of the Class A-10
Certificates" herein and "Description of the Certificates--Principal  (Including
Prepayments)"  and  "Prepayment  and  Yield  Considerations"  in  the Prospectus
Supplement and in the Prospectus.
 
                                                        (CONTINUED ON NEXT PAGE)
                             ---------------------
 
THESE SECURITIES DO NOT REPRESENT INTERESTS IN OR OBLIGATIONS OF THE PRUDENTIAL
HOME MORTGAGE SECURITIES COMPANY, INC. OR ANY AFFILIATE THEREOF. NEITHER THESE
        SECURITIES NOR THE UNDERLYING MORTGAGE LOANS WILL BE INSURED OR
          GUARANTEED BY ANY GOVERNMENTAL AGENCY OR INSTRUMENTALITY.
                             ---------------------
 
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  SUPPLEMENT,  THE  PROSPECTUS
       SUPPLEMENT OR THE  PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY
                             IS A CRIMINAL OFFENSE.
                             ---------------------
 
    The Class A-10  Certificates are being  offered by PaineWebber  Incorporated
(the  "Underwriter") from time to time  to the public in negotiated transactions
or otherwise at varying prices to be determined at the time of sale. Proceeds to
the Seller from the  sale of the Class  A-10 Certificates will be  approximately
1.38% of the Pool Scheduled Principal Balance as of the Distribution Date in May
1996  without  giving effect  to partial  principal  prepayments or  net partial
liquidation proceeds received on or after the Determination Date in April  1996,
plus  accrued interest from April 1, 1996 to (but not including) April 26, 1996,
before deducting expenses  payable by the  Seller estimated to  be $45,000.  See
"Underwriting" herein.
 
    The Class A-10 Certificates are offered subject to receipt and acceptance by
the  Underwriter, to  prior sale  and to the  Underwriter's right  to reject any
order in whole or in  part and to withdraw, cancel  or modify the offer  without
notice. It is expected that delivery of the Class A-10 Certificates will be made
at  the office  of PaineWebber  Incorporated, 1285  Avenue of  the Americas, New
York, New York 10019, on or about April 26, 1996.
                             ---------------------
 
                            PAINEWEBBER INCORPORATED
                                  -----------
 
                 The date of this Supplement is April 18, 1996.
<PAGE>
(CONTINUED FROM PREVIOUS PAGE)
 
    The  Class  A-10  Certificates  may  not  be  appropriate  investments   for
individual  investors.  The  Class  A-10  Certificates  are  offered  in minimum
denominations of $222,634,000  initial Class A-10  Notional Amount as  described
herein under "Description of the Certificates." Except as set forth below, it is
intended  that the Class A-10 Certificates not be directly or indirectly held or
beneficially  owned  by  any   person  in  amounts   lower  than  such   minimum
denomination.  The  Class A-10  Certificates may  be  transferred to  persons in
amounts lower than the minimum denomination but only if any such person delivers
to the Trustee an affidavit concerning certain matters related to the  financial
sophistication   and  net  worth  of  such   person.  See  "Description  of  the
Certificates"and "Restrictions  on  Transfer  of the  Class  A-10  Certificates"
herein.
 
    There  is currently no secondary market  for the Class A-10 Certificates and
there can be no assurance  that a secondary market will  develop or, if it  does
develop, that it will provide Certificateholders with liquidity of investment at
any  particular  time  or for  the  life  of the  Class  A-10  Certificates. The
Underwriter intends to  act as a  market maker in  the Class A-10  Certificates,
subject  to applicable provisions of federal and state securities laws and other
regulatory requirements, but is under no obligation to do so and any such market
making may be  discontinued at  any time.  There can  be no  assurance that  any
investor  will be able to sell  a Class A-10 Certificate at  a price equal to or
greater than the price at which such Certificate was purchased.
 
    Distributions in respect of interest are made on the 25th day of each month,
or if such day is  not a business day, the  next succeeding business day to  the
holders of record of the Class A-10 Certificates on the last business day of the
preceding  month,  to  the  extent  that their  allocable  portion  of  the Pool
Distribution Amount (as  defined herein) is  sufficient therefor. Interest  will
accrue  monthly on the Class A-10 Certificates at  a per annum rate equal to the
weighted average of the Net Mortgage  Interest Rates (as defined herein) of  the
Mortgage Loans as of the first day of such period minus 7.50%, on the Class A-10
Notional  Amount (as defined herein),  less any Non-Supported Interest Shortfall
(as defined herein) and other losses allocable to the Class A-10 Certificates as
described   in   the   Prospectus   Supplement   under   "Description   of   the
Certificates--Interest."  The Class  A Subclass  Principal Balance  of the Class
A-10 Certificates as of the Determination Date in April 1996 has been reduced to
zero. Distributions on the Class A-10  Certificates will be made pro rata  among
Certificateholders  of  such Subclass  based on  their Percentage  Interests (as
defined in the Prospectus Supplement).
 
    This Supplement does  not contain complete  information regarding the  Class
A-10  Certificates and  should be read  only in conjunction  with the Prospectus
Supplement and the Prospectus. Sales of  the Class A-10 Certificates may not  be
consummated  unless the purchaser  has received this  Supplement, the Prospectus
Supplement and  the  Prospectus. Capitalized  terms  used herein  that  are  not
otherwise  defined shall  have the meanings  ascribed thereto  in the Prospectus
Supplement or the Prospectus, as applicable.
                              -------------------
 
    UNTIL JULY 18, 1996,  ALL DEALERS EFFECTING TRANSACTIONS  IN THE CLASS  A-10
CERTIFICATES, WHETHER OR NOT PARTICIPATING IN THIS DISTRIBUTION, MAY BE REQUIRED
TO  DELIVER THIS SUPPLEMENT, THE PROSPECTUS  SUPPLEMENT AND THE PROSPECTUS. THIS
IS IN ADDITION  TO THE  OBLIGATION OF DEALERS  TO DELIVER  THIS SUPPLEMENT,  THE
PROSPECTUS  SUPPLEMENT AND THE  PROSPECTUS WHEN ACTING  AS UNDERWRITERS AND WITH
RESPECT TO THEIR UNSOLD ALLOTMENTS OR SUBSCRIPTIONS.
 
                                      S1-2
<PAGE>
                                    GENERAL
 
    The  following is  qualified in  its entirety  by reference  to the detailed
information appearing in the Prospectus  Supplement and in the Prospectus,  each
of  which should be read in  conjunction with this Supplement. Capitalized terms
used in  this Supplement  and not  otherwise defined  herein have  the  meanings
assigned  in  the Prospectus  Supplement  or in  the  Prospectus. See  "Index of
Significant Prospectus Supplement Definitions" in the Prospectus Supplement  and
"Index of Significant Definitions" in the Prospectus.
 
    The  Series 1992-13 Certificates were issued on  May 8, 1992. The Class A-10
Certificates were not offered to the public  at the time of the issuance of  the
Series 1992-13 Certificates.
 
                    RISK FACTORS AND SPECIAL CONSIDERATIONS
 
YIELD CONSIDERATIONS
 
    The  yield  to maturity  of  the Class  A-10  Certificates will  be directly
related to the rate of payments of principal on the Mortgage Loans in the  Trust
Estate,  particularly with respect to those  Mortgage Loans with higher rates of
interest. The rate of principal payments on  the Mortgage Loans will in turn  be
affected  by  the amortization  schedules  of the  Mortgage  Loans, the  rate of
principal prepayments (including  partial prepayments and  those resulting  from
refinancing)  thereon by  mortgagors, liquidations of  defaulted Mortgage Loans,
repurchases  by  the  Seller  of  Mortgage  Loans  as  a  result  of   defective
documentation or breaches of representations and warranties, optional repurchase
by  the Seller of defaulted Mortgage Loans and optional purchase by the Servicer
of all of the  Mortgage Loans in  connection with the  termination of the  Trust
Estate. See "Description of the Mortgage Loans--Optional Repurchase of Defaulted
Mortgage  Loans" and "Pooling and  Servicing Agreement--Optional Termination" in
the Prospectus Supplement and "The Trust Estates--Mortgage Loans--Assignment  of
Mortgage  Loans to the  Trustee," "--Optional Repurchases"  and "The Pooling and
Servicing Agreement--Termination; Purchase of Mortgage Loans" in the Prospectus.
Mortgagors are permitted to prepay the Mortgage  Loans, in whole or in part,  at
any time without penalty.
 
    The  rate of payments (including prepayments)  on pools of mortgage loans is
influenced by a variety  of economic, geographic, social  and other factors.  If
prevailing  rates for  similar mortgage loans  fall below  the Mortgage Interest
Rates on the Mortgage Loans, the rate of prepayment would generally be  expected
to  increase. Conversely, if interest rates on similar mortgage loans rise above
the Mortgage Interest Rates on the Mortgage Loans, the rate of prepayment  would
generally be expected to decrease.
 
    The  yield to maturity on the Class A-10 Certificates may be affected by the
geographic concentration  of  the  Mortgaged Properties  securing  the  Mortgage
Loans.  As  of March  15, 1996,  Mortgaged Properties  located in  the following
states secured at least 5.00% of  the Aggregate Unpaid Principal Balance of  the
Mortgage  Loans: California  (31.59%), New  York (14.69%),  New Jersey (12.69%),
Florida (5.80%) and Texas (5.10%). In recent years, California and several other
regions in the United  States have experienced  significant declines in  housing
prices.  In  addition,  California,  as  well  as  certain  other  regions,  has
experienced natural disasters, including  earthquakes, hurricanes and  flooding,
which  may adversely affect property values.  Any direct damage to the Mortgaged
Properties  caused  by  such  disasters,  deterioration  in  housing  prices  in
California  (and to  a lesser  extent the  other states  in which  the Mortgaged
Properties are  located) or  the deterioration  of economic  conditions in  such
regions which adversely affects the ability of borrowers to make payments on the
Mortgage Loans may increase the likelihood of losses on the Mortgage Loans. Such
losses,  if  they  occur,  may  increase  the  likelihood  of  liquidations  and
prepayments which may have  an adverse effect  on the yield  to maturity of  the
Class A-10 Certificates. See "Description of the Mortgage Loans" herein.
 
    AN  INVESTOR THAT PURCHASES CLASS A-10 CERTIFICATES, WHICH CURRENTLY HAVE NO
PRINCIPAL BALANCE AND ARE ONLY ENTITLED TO DISTRIBUTIONS IN RESPECT OF INTEREST,
SHOULD CONSIDER  THE RISK  THAT  A FASTER  THAN  ANTICIPATED RATE  OF  PRINCIPAL
PAYMENTS ON THE MORTGAGE LOANS WILL RESULT IN AN ACTUAL YIELD THAT IS LOWER THAN
SUCH INVESTOR'S EXPECTED YIELD AND MAY RESULT IN THE FAILURE OF SUCH INVESTOR TO
FULLY  RECOVER ITS INITIAL INVESTMENT. See "Sensitivity of the Pre-Tax Yield and
Weighted Average Life of the Class A-10 Certificates" herein and "Prepayment and
Yield Considerations" in the Prospectus Supplement.
 
                                      S1-3
<PAGE>
RECENT DEVELOPMENTS AFFECTING THE SELLER AND SERVICER
 
    The Seller and  the Servicer are  each either a  direct or indirect,  wholly
owned  subsidiary of  Residential Services  Corporation of  America, which  is a
direct, wholly owned subsidiary of The Prudential Insurance Company of  America,
a  mutual insurance company organized under the  laws of the State of New Jersey
("Prudential Insurance"). On  January 29, 1996,  Prudential Insurance  announced
that it had entered into a definitive agreement (the "Sale Agreement") to sell a
substantial  portion of its residential mortgage operations to Norwest Mortgage,
Inc., a California corporation ("Norwest Mortgage"), and Norwest Bank  Minnesota
National  Association,  a  national  banking  association  ("Norwest  Bank" and,
collectively with Norwest Mortgage, "Norwest"). In connection therewith, on  the
closing  date specified pursuant to the  Sale Agreement (the "Sale Date"), which
is currently expected to be  on or about April  30, 1996, Norwest Mortgage  will
acquire  from the Servicer substantially all of its assets and businesses, other
than certain mortgage loans and the  Servicer's right to service mortgage  loans
underlying  series of mortgage  pass-through certificates representing interests
in trusts formed by the Seller or by Securitized Asset Sales, Inc., an affiliate
of the Seller  and the Servicer  ("SASI"), including the  Mortgage Loans in  the
Trust  Estate, and certain  other mortgage servicing  rights (all such servicing
rights collectively, the "Retained Servicing").  It is the present intention  of
the  Servicer  to sell  the  Retained Servicing,  from  time to  time  as market
conditions warrant, in one or more transactions to one or more purchasers, which
may include  Norwest  Mortgage,  and  to  effectively  exit  the  mortgage  loan
origination and servicing business as of the Sale Date.
 
    In order to assure the performance of the Servicer's obligations as servicer
under  the Pooling and  Servicing Agreement as  well as under  other pooling and
servicing agreements pursuant to which  various series of the Seller's  mortgage
pass-through certificates were issued and other agreements pursuant to which the
Servicer  performs Retained Servicing with  respect to mortgage loans underlying
series of mortgage  pass-through certificates representing  interests in  trusts
formed  by the  Seller or  SASI (each, a  "Servicing Agreement")  and under each
other agreement pursuant to which the Servicer performs Retained Servicing  with
respect  to  mortgage  loans  not  underlying  series  of  mortgage pass-through
certificates representing  interests in  trusts  formed by  the Seller  or  SASI
(each,  an "Other Servicing Agreement"),  the Servicer, Prudential Insurance and
Norwest intend to enter into the following arrangements:
 
    1.  SUBSERVICING AGREEMENT.  The Servicer, Prudential Insurance and  Norwest
Mortgage   will  enter   into  a   subservicing  agreement   (the  "Subservicing
Agreement"), pursuant to which the  Servicer will delegate to Norwest  Mortgage,
and  Norwest Mortgage will  agree to perform,  all of the  Servicer's duties and
obligations as mortgage loan servicer under the Pooling and Servicing  Agreement
and  each  Servicing Agreement  and Other  Servicing  Agreement, other  than the
Servicer's duties with  respect to  the administration and  disposition of  real
estate   acquired  upon  foreclosure,  which   latter  duties  will  remain  the
responsibility of the Servicer with the particular functions to be delegated  by
the Servicer to Prudential Asset Recovery, Inc., an affiliate of the Seller, the
Servicer,  SASI and Prudential Insurance, or other third party contractors. With
respect to the Series  1992-13 Certificates, such  duties include collection  of
mortgage  payments,  maintenance of  tax  and insurance  escrows,  advancing for
borrower delinquencies and unpaid taxes, to  the extent required by the  Pooling
and  Servicing  Agreement, and  foreclosure or  other realization  activities in
connection with defaulted Mortgage Loans.
 
    Under the Subservicing Agreement, Norwest Mortgage will be obligated to make
any principal and interest or other advances required to be made by the Servicer
under the  Pooling and  Servicing  Agreement as  well  as under  each  Servicing
Agreement or Other Servicing Agreement, provided that the aggregate unreimbursed
amount  of such advances at any time  does not exceed $100 million. The Servicer
will be  obligated to  reimburse Norwest  Mortgage for  the amount  of any  such
advances,  plus interest, from its own funds. The Servicer will remain obligated
under the Pooling and Servicing Agreement and each Servicing Agreement and Other
Servicing Agreement for  all required  advances which  are not  made by  Norwest
Mortgage for any reason. In order to provide for its obligation to make advances
after  the  Sale  Date, the  Servicer  will  enter into  a  Loan  Agreement with
Prudential Funding Corporation, an affiliate  of the Seller, the Servicer,  SASI
and Prudential Insurance ("Funding"), pursuant to which Funding will provide the
Servicer  with a committed borrowing line (the "Loan Facility") in the amount of
$40 million for the sole purpose of supporting advances required of the Servicer
under the Pooling and Servicing Agreement and Servicing Agreements. Although the
Servicer  expects   that  the   combination   of  Norwest   Mortgage's   advance
 
                                      S1-4
<PAGE>
obligation  under  the  Subservicing Agreement  and  the Loan  Facility  will be
adequate to provide for the continuation of  all such advances, there can be  no
assurance  that such mechanisms will be sufficient,  or that after the Sale Date
the Servicer will  have sufficient  other assets,  to ensure  that all  required
advances will be made.
 
    The Servicer will pay Norwest Mortgage a portion of the Servicer's servicing
compensation  under the  Pooling and Servicing  Agreement for  its activities as
subservicer. The Subservicing Agreement will have an initial term of five  years
from  the Sale Date and may be extended  for consecutive three year terms by the
Servicer, at its option, provided that the Servicer and Norwest Mortgage  agree,
in  the exercise of good  faith, on the subservicing  compensation for each such
renewal term. The  Subservicing Agreement  will be terminable  by the  Servicer,
from  time to time, with respect to any  Mortgage Loans as to which the Servicer
arranges to sell the Retained Servicing.
 
    2.  CERTIFICATE  ADMINISTRATION AGREEMENT.   The Servicer  and Norwest  Bank
will  enter  into  an agreement  (the  "Certificate  Administration Agreement"),
pursuant to which the Servicer will  delegate to Norwest Bank, and Norwest  Bank
will  agree  to  perform, all  of  the  Servicer's obligations  with  respect to
administrative  and  reporting  functions   under  the  Pooling  and   Servicing
Agreement.  Such duties  include calculation  of distributions,  preparation and
filing of tax returns, preparation of  reports to investors and preparation  and
filing  of  periodic  reports under  the  Securities  Exchange Act  of  1934, as
amended.
 
    The Subservicing Agreement and the Certificate Administration Agreement will
collectively provide for the delegation  of substantially all of the  Servicer's
duties  and obligations  under the  Pooling and  Servicing Agreement.  While the
Pooling and Servicing Agreement  provides that the  Servicer will remain  liable
for   its  obligations  thereunder  until  the  related  Retained  Servicing  is
transferred in the manner  permitted thereby, from and  after the Sale Date  the
Servicer  is not  expected to  have any  servicing capability  or employees with
which to perform such obligations.
 
    Under the  Pooling and  Servicing Agreement,  the Seller  is required,  with
respect to any Mortgage Loan found to have defective documentation or in respect
of  which  the  Seller has  breached  a  representation or  warranty,  either to
repurchase such Mortgage  Loan or to  substitute a new  mortgage loan  therefor.
Each  such Mortgage Loan was, in turn,  acquired by the Seller from the Servicer
pursuant to an agreement under which  the Servicer is required to repurchase  or
substitute  for any such Mortgage Loan so  repurchased or substituted for by the
Seller. Although  after the  Sale Date  the Servicer  will continue  to own  the
Retained  Servicing,  the Servicer  intends to  sell  the Retained  Servicing as
expeditiously  as  market  conditions  permit.  Accordingly,  there  can  be  no
assurance  that  at any  time after  the Sale  Date the  Servicer will  have any
material assets with which  to satisfy such obligations  to the Seller. In  such
event,  the Seller  would be  unable to  fulfill its  repurchase or substitution
obligations under the Pooling and  Servicing Agreement. However with respect  to
any Mortgage Loan subserviced pursuant to the Subservicing Agreement, Prudential
Insurance  will  agree in  the Subservicing  Agreement to  provide the  funds to
repurchase such Mortgage Loan.
 
    According to information provided by Norwest Mortgage, at December 31, 1995,
Norwest Mortgage  was  the  nation's  largest  mortgage  originator  and  had  a
servicing  portfolio  of  more  than $107  billion.  In  1995,  Norwest Mortgage
originated over $33 billion of residential mortgage loans. Headquartered in  Des
Moines,  Iowa, Norwest Mortgage has more than 700 loan production offices in all
50 states.  While derived  from sources  believed to  be reliable,  neither  the
Seller,  the Servicer nor  the Underwriter makes  any representation or warranty
regarding the  accuracy or  completeness of  the information  contained in  this
paragraph.
 
                                      S1-5
<PAGE>
                        DESCRIPTION OF THE CERTIFICATES
 
    The   Class  A-10  Certificates   will  be  offered   in  fully  registered,
certificated form in  minimum denominations of  $222,634,000 initial Class  A-10
Notional  Amount; provided,  however, that  the Class  A-10 Certificates  may be
issued in minimum denominations of $9,087,000 initial Class A-10 Notional Amount
to persons who  deliver to the  Trustee an affidavit  stating that such  person:
(a)(i)  is a substantial, sophisticated, institutional investor having knowledge
and experience in  financial and  business matters,  and in  particular in  such
matters  related to securities similar to the Class A-10 Certificates, such that
such investor is capable of evaluating the merits and risks of an investment  in
the  Class A-10 Certificates, and (ii) has  a net worth of at least $10,000,000;
or (b) will  hold the Class  A-10 Certificates  solely as nominee  for a  person
meeting the criteria set forth in clause (a). The Class A-10 Certificates may be
issued  in any amounts in excess of  any such minimum denominations. The Class A
Subclass  Principal  Balance  of   the  Class  A-10   Certificates  as  of   the
Determination Date in April 1996 has been reduced to zero.
 
    Distributions of interest to holders of Class A-10 Certificates will be made
monthly, to the extent of such Subclass' entitlement thereto, on the 25th day of
each month or, if such day is not a business day, on the succeeding business day
(each, a "Distribution Date"), beginning in May 1996.
 
    Distributions  (other than the final distribution in retirement of the Class
A-10 Certificates, as described  in the Prospectus Supplement)  will be made  by
check  mailed to the address of the person entitled thereto as it appears on the
Certificate Register.  However,  with  respect  to  any  holder  of  Class  A-10
Certificates  evidencing at least a  25% Percentage Interest, distributions will
be made  on the  Distribution Date  by wire  transfer in  immediately  available
funds,  provided that the Servicer, or the  paying agent acting on behalf of the
Servicer, shall have  been furnished  with appropriate  wiring instructions  not
less than seven business days prior to the related Distribution Date.
 
    The Class A-10 Certificates will be entitled to a distribution in respect of
interest  each month in an amount up to such Subclass' Class A Subclass Interest
Accrual Amount. The Class A Subclass Interest Accrual Amount for the Class  A-10
Certificates  will equal the product of (i) 1/12th of the difference between (a)
the weighted average of  the Net Mortgage Interest  Rates of the Mortgage  Loans
(based  on the  Scheduled Principal  Balances of the  Mortgage Loans  as of such
Distribution Date) and (b) 7.50% and (ii) the Class A-10 Notional Amount.
 
    The Class A Subclass Interest Accrual Amount for the Class A-10 Certificates
will be  reduced by  the portion  of (i)  any Non-Supported  Interest  Shortfall
allocable  to  such Subclass  and (ii)  the interest  portion of  Excess Special
Hazard Losses, Excess  Fraud Losses  and Excess Bankruptcy  Losses allocable  to
such  Subclass as described under "Description of the Certificates--Interest" in
the Prospectus Supplement.
 
    The "Net  Mortgage Interest  Rate" on  each Mortgage  Loan is  equal to  the
Mortgage  Interest Rate on such Mortgage Loan  as stated in the related Mortgage
Note minus the Servicing Fee rate of 0.25% per annum. See "Pooling and Servicing
Agreement--Servicing Compensation  and Payment  of Expenses"  in the  Prospectus
Supplement.
 
    The "Class A-10 Notional Amount" with respect to each Distribution Date will
be  equal to the Pool Scheduled Principal Balance, as defined under "Description
of  the  Certificates--Principal  (Including  Prepayments)"  in  the  Prospectus
Supplement,  as of such  Distribution Date. The Class  A-10 Notional Amount with
respect to the Distribution  Date in March  1996 was approximately  $93,239,629.
The Class A-10 Notional Amount with respect to the Distribution Date in May 1996
will be equal to the Class A-10 Notional Amount with respect to the Distribution
Date  in March  1996, less the  difference between the  Pool Scheduled Principal
Balance with  respect  to the  Distribution  Date in  March  1996 and  the  Pool
Scheduled Principal Balance with respect to the Distribution Date in May 1996. A
notional  amount does not entitle a holder to receive distributions of principal
on the basis  of such notional  amount, but is  solely used for  the purpose  of
computing  the amount of interest accrued on  a Subclass. The initial Class A-10
Notional Amount was approximately $445,269,594.
 
    Notwithstanding anything  contained  in  the Prospectus  Supplement  or  the
Prospectus  to the contrary,  the "Pool Distribution  Amount" for a Distribution
Date will be the sum of all previously undistributed payments or other  receipts
on  account  of  principal  (including  principal  prepayments  and  Liquidation
Proceeds in respect of principal, if any)  and interest on or in respect of  the
Mortgage  Loans  received by  the Servicer  after the  Cut-Off Date  (except for
amounts due on or prior to the Cut-Off Date), or received by the Servicer on  or
prior  to  the Cut-Off  Date  but due  after the  Cut-Off  Date, in  either case
received on or prior to the business day preceding the Determination Date in the
 
                                      S1-6
<PAGE>
month in which  such Distribution Date  occurs, plus (i)  all Periodic  Advances
made  by the Servicer  and (ii) all other  amounts required to  be placed in the
Certificate Account  by  the Servicer  pursuant  to the  Pooling  and  Servicing
Agreement, but excluding the following:
 
        (a)   amounts  received  as  late  payments  of  principal  or  interest
    respecting which the Servicer previously  has made one or more  unreimbursed
    Periodic Advances;
 
        (b) any unreimbursed Periodic Advances with respect to Liquidated Loans;
 
        (c)  those portions of each payment of interest on a particular Mortgage
    Loan which represent the applicable Servicing Fee, as adjusted in respect of
    Prepayment Interest  Shortfalls  as  described  under  "Description  of  the
    Certificates--Interest" in the Prospectus Supplement;
 
        (d)  all  amounts  representing  scheduled  payments  of  principal  and
    interest due  after  the Due  Date  occurring in  the  month in  which  such
    Distribution Date occurs;
 
        (e)  all principal prepayments in full  and all proceeds of any Mortgage
    Loans, or  property acquired  in  respect thereof,  liquidated,  foreclosed,
    purchased  or repurchased pursuant  to the Pooling  and Servicing Agreement,
    received on or  after the  Due Date  occurring in  the month  in which  such
    Distribution  Date occurs, and all partial principal prepayments received by
    the Servicer on or  after the Determination Date  occurring in the month  in
    which such Distribution Date occurs, and all related payments of interest on
    such amounts;
 
         (f)  to the  extent permitted by  the Pooling  and Servicing Agreement,
    that portion of Liquidation Proceeds or insurance proceeds with respect to a
    Mortgage Loan  which  represents  any  unpaid Servicing  Fee  to  which  the
    Servicer is entitled;
 
        (g)  all  amounts  representing  certain  expenses  reimbursable  to the
    Servicer and  other amounts  permitted to  be retained  by the  Servicer  or
    withdrawn  by  the Servicer  from the  Certificate  Account pursuant  to the
    Pooling and Servicing Agreement;
 
        (h) all amounts in the nature of late fees, assumption fees,  prepayment
    fees and similar fees which the Servicer is entitled to retain as additional
    servicing compensation;
 
         (i)  reinvestment  earnings  on  payments received  in  respect  of the
    Mortgage Loans; and
 
         (j) Net Foreclosure Profits.
 
    Notwithstanding anything  contained  in  the Prospectus  Supplement  or  the
Prospectus to the contrary, if, on any Determination Date, payments of principal
and  interest due on  any Mortgage Loan in  the Trust Estate  on the related Due
Date have not  been received as  of the close  of business on  the business  day
preceding  such  Determination  Date, the  Servicer  will be  obligated  to make
Periodic Advances on or before the related Distribution Date for the benefit  of
holders of the Series 1992-13 Certificates.
 
    Notwithstanding  anything in the Prospectus  Supplement or the Prospectus to
the contrary, "Prepayment Interest Shortfalls"  will consist of both  shortfalls
in  collections of  interest as  a result  of principal  prepayments in  full of
Mortgage Loans and as a result  of the timing of partial principal  prepayments.
Prepayment  Interest Shortfalls  will be offset  to the extent  of the aggregate
Servicing Fees relating to mortgagor payments or other recoveries distributed on
the related  Distribution Date.  To  the extent  that the  aggregate  Prepayment
Interest  Shortfalls with  respect to a  Distribution Date  exceed the aggregate
Servicing Fees relating to mortgagor payments or other recoveries distributed on
such Distribution  Date, the  resulting interest  shortfall (the  "Non-Supported
Interest  Shortfall") will be  allocated as described  under "Description of the
Certficates--Interest" in the Prospectus Supplement.
 
    Notwithstanding anything  contained  in  the Prospectus  Supplement  or  the
Prospectus  to the contrary, clause (vii) of  the definition of "Class A Optimal
Principal Amount" should read "the Class A Prepayment Percentage of all  partial
principal  prepayments received  by the Servicer  on or  after the Determination
Date occurring in the month preceding the month in which such Distribution  Date
occurs  and prior to the Determination Date occurring in the month in which such
Distribution Date occurs."
 
                                      S1-7
<PAGE>
    As described under "Pooling  and Servicing Agreement--Optional  Termination"
in  the Prospectus Supplement, the Servicer has  the right, but is not required,
to purchase from  the Trust  Estate all  remaining Mortgage  Loans, and  thereby
effect  early retirement of the Series 1992-13 Certificates, on any Distribution
Date when the Pool Scheduled Principal Balance  is less than 10% of the  Cut-Off
Date  Aggregate  Principal Balance  (as defined  in the  Prospectus Supplement).
However, the Servicer will agree that for so long as the Class A-10 Certificates
are outstanding, without the consent of  holders of 66 2/3% Percentage  Interest
of the Class A-10 Certificates, the Servicer will not exercise such right unless
the  Pool Scheduled Principal Balance of the  Mortgage Loans is equal to or less
than 1% of the Cut-Off Date Aggregate Principal Balance.
 
    The Prospectus Supplement and the Prospectus contain significant  additional
information  concerning  the  characteristics of  the  Class  A-10 Certificates.
Investors are urged to read "Description of the Certificates" in the  Prospectus
Supplement and in the Prospectus.
 
                                      S1-8
<PAGE>
                       DESCRIPTION OF THE MORTGAGE LOANS
 
    As  of March 15, 1996,  the Mortgage Loans in  the Trust Estate consisted of
fixed interest  rate,  conventional,  monthly pay,  fully  amortizing,  one-  to
four-family, residential first mortgage loans originated or acquired by PHMC for
its  own account  or for the  account of  an affiliate having  original terms to
stated maturity of approximately 15 years.  The "Unpaid Principal Balance" of  a
Mortgage  Loan as of March  15, 1996 is its unpaid  principal balance as of such
date assuming no delinquencies and no prepayments in full. As of March 15, 1996,
the Mortgage Loans  included 575  promissory notes, having  an aggregate  Unpaid
Principal  Balance (the  "Aggregate Unpaid Principal  Balance") of approximately
$92,218,514, secured by  first liens  (the "Mortgages") on  one- to  four-family
residential  properties (the "Mortgaged Properties"). As  of March 15, 1996, six
such  Mortgage  Loans   having  an   aggregate  Unpaid   Principal  Balance   of
approximately  $949,206 have prepaid  in full. Prepayments  in full occurring in
March 1996  will reduce  the Class  A-10  Notional Amount  with respect  to  the
Distribution   Date  in  May  1996.  The  Mortgage  Loans  have  the  additional
characteristics described below and in the Prospectus.
 
    No Mortgage Loan is a Buy-Down Loan. See "The Trust Estates--Mortgage Loans"
in the Prospectus.  As of  March 15, 1996,  twenty-five of  the Mortgage  Loans,
representing  approximately 2.68% of  the Aggregate Unpaid  Principal Balance of
the Mortgage Loans,  were Relocation  Mortgage Loans.  See "PHMC--Mortgage  Loan
Production Sources" in the Prospectus.
 
    Each  of the Mortgage Loans is subject to a due-on-sale clause. See "Certain
Legal Aspects of the Mortgage Loans--'Due-on-Sale' Clause" and "Servicing of the
Mortgage Loans--Enforcement of Due-on-Sale  Clauses; Realization Upon  Defaulted
Mortgage Loans" in the Prospectus.
 
    As  of March 15, 1996, each Mortgage Loan had an Unpaid Principal Balance of
not less than  $1,972 or more  than $798,937, and  the average Unpaid  Principal
Balance  of the  Mortgage Loans  was approximately  $160,380. The  latest stated
maturity date of any of  the Mortgage Loans was  February 1, 2008; however,  the
actual  date on which any Mortgage Loan is  paid in full may be earlier than the
stated maturity  date  due  to  unscheduled  payments  of  principal.  Based  on
information   supplied  by  the   mortgagors  in  connection   with  their  loan
applications at  origination,  514 of  the  Mortgaged Properties,  which  secure
approximately  93.30% of the Aggregate Unpaid  Principal Balance of the Mortgage
Loans,  were  owner  occupied  primary  residences  and  61  of  the   Mortgaged
Properties,  which secure approximately 6.70%  of the Aggregate Unpaid Principal
Balance of the  Mortgage Loans,  were non-owner  occupied or  second homes.  See
"PHMC--Mortgage Loan Underwriting" in the Prospectus.
 
    As   of  March  15,   1996,  three  of   the  Mortgage  Loans,  representing
approximately 0.64% of the  Aggregate Unpaid Principal  Balance of the  Mortgage
Loans,   were  Subsidy  Loans.  See  "The  Trust  Estates--Mortgage  Loans"  and
"PHMC--Mortgage Loan Underwriting" in the Prospectus.
 
                                      S1-9
<PAGE>
    Set forth below is  a description of  certain additional characteristics  of
the Mortgage Loans as of March 15, 1996 (except as otherwise indicated).
 
                            MORTGAGE INTEREST RATES
 
<TABLE>
<CAPTION>
                                                                       PERCENTAGE OF
                                                         AGGREGATE       AGGREGATE
                                          NUMBER OF       UNPAID           UNPAID
                                          MORTGAGE       PRINCIPAL       PRINCIPAL
MORTGAGE INTEREST RATE                      LOANS         BALANCE         BALANCE
- ----------------------------------------  ---------   ---------------  --------------
<S>                                       <C>         <C>              <C>
7.750%..................................      22      $  2,833,708.97        3.07   %
7.875%..................................      65        11,739,332.58       12.73
8.000%..................................      41         6,693,816.91        7.26
8.125%..................................      62         8,989,447.84        9.75
8.250%..................................      81        14,833,339.76       16.09
8.375%..................................      65        11,097,452.75       12.03
8.500%..................................      53         8,725,109.57        9.46
8.625%..................................      60         9,549,655.60       10.36
8.750%..................................      44         7,381,929.09        8.00
8.875%..................................      27         3,831,192.57        4.15
9.000%..................................      23         2,785,181.25        3.02
9.125%..................................      13         2,150,145.68        2.33
9.250%..................................      11           707,799.95        0.77
9.375%..................................       3           312,280.66        0.34
9.500%..................................       2           100,739.51        0.11
9.625%..................................       2           458,675.41        0.50
10.875%.................................       1            28,706.04        0.03
                                             ---      ---------------     -------
        Total...........................     575      $ 92,218,514.14      100.00   %
                                             ---      ---------------     -------
                                             ---      ---------------     -------
</TABLE>
 
As  of  March 15,  1996,  the weighted  average  Mortgage Interest  Rate  of the
Mortgage Loans was  approximately 8.364%  per annum. The  Net Mortgage  Interest
Rate  of  each Mortgage  Loan is  equal to  the Mortgage  Interest Rate  of such
Mortgage Loan minus the Servicing Fee rate  of 0.25% per annum. As of March  15,
1996,  the weighted average Net Mortgage Interest Rate of the Mortgage Loans was
approximately 8.114% per annum.
 
                      REMAINING MONTHS TO STATED MATURITY
 
<TABLE>
<CAPTION>
                                                                       PERCENTAGE OF
                                                         AGGREGATE       AGGREGATE
                                          NUMBER OF       UNPAID           UNPAID
                                          MORTGAGE       PRINCIPAL       PRINCIPAL
REMAINING STATED TERM (MONTHS)              LOANS         BALANCE         BALANCE
- ----------------------------------------  ---------   ---------------  --------------
<S>                                       <C>         <C>              <C>
40......................................       1      $     35,615.63     0.04   %
101.....................................       1            28,706.04     0.03
125.....................................       1           215,341.71     0.23
126.....................................       2           281,556.51     0.31
128.....................................       7           523,333.05     0.57
129.....................................      11         1,315,202.96     1.43
130.....................................      25         3,174,932.27     3.44
131.....................................      72        10,879,969.94    11.80
132.....................................     159        28,626,302.18    31.04
133.....................................     270        43,917,418.33    47.62
134.....................................      25         3,000,038.57     3.25
143.....................................       1           220,096.95     0.24
                                             ---      ---------------  -------
        Total...........................     575      $ 92,218,514.14   100.00   %
                                             ---      ---------------  -------
                                             ---      ---------------  -------
</TABLE>
 
As of March 15, 1996, the weighted average remaining term to stated maturity  of
the Mortgage Loans was approximately 132 months.
 
                                     S1-10
<PAGE>
                              YEAR OF ORIGINATION
 
<TABLE>
<CAPTION>
                                                                       PERCENTAGE OF
                                                         AGGREGATE       AGGREGATE
                                          NUMBER OF       UNPAID           UNPAID
                                          MORTGAGE       PRINCIPAL       PRINCIPAL
YEAR OF ORIGINATION                         LOANS         BALANCE         BALANCE
- ----------------------------------------  ---------   ---------------  --------------
<S>                                       <C>         <C>              <C>
1984....................................       1      $     35,615.63     0.04   %
1989....................................       1            28,706.04     0.03
1991....................................      47         5,708,196.13     6.19
1992....................................     526        86,445,996.34    93.74
                                             ---      ---------------  -------
        Total...........................     575      $ 92,218,514.14   100.00   %
                                             ---      ---------------  -------
                                             ---      ---------------  -------
</TABLE>
 
As  of March 15, 1996 the earliest month and year of origination of any Mortgage
Loan was June 1984 and the latest month and year of origination of any  Mortgage
Loan was April 1992.
 
                         ORIGINAL LOAN-TO-VALUE RATIOS
 
<TABLE>
<CAPTION>
                                                                       PERCENTAGE OF
                                                         AGGREGATE       AGGREGATE
                                          NUMBER OF       UNPAID           UNPAID
                                          MORTGAGE       PRINCIPAL       PRINCIPAL
ORIGINAL LOAN-TO-VALUE RATIO                LOANS         BALANCE         BALANCE
- ----------------------------------------  ---------   ---------------  --------------
<S>                                       <C>         <C>              <C>
50.0% or less...........................     113      $ 11,647,285.40       12.63   %
50.1-55.0%..............................      36         7,732,812.57        8.39
55.1-60.0%..............................      42         6,982,498.07        7.57
60.1-65.0%..............................      47         7,286,397.59        7.90
65.1-70.0%..............................      80        14,083,535.59       15.27
70.1-75.0%..............................     104        17,769,675.37       19.27
75.1-80.0%..............................     135        23,247,975.45       25.21
80.1-85.0%..............................       1           120,063.98        0.13
85.1-90.0%..............................      17         3,348,270.12        3.63
                                             ---      ---------------     -------
        Total...........................     575      $ 92,218,514.14      100.00   %
                                             ---      ---------------     -------
                                             ---      ---------------     -------
</TABLE>
 
As of March 15, 1996 the minimum and maximum Loan-to-Value Ratios at origination
of  the  Mortgage Loans  were  9.8% and  90.0%,  respectively, and  the weighted
average  Loan-to-Value  Ratio   at  origination  of   the  Mortgage  Loans   was
approximately  66.5%. The Loan-to-Value  Ratio of a  Mortgage Loan is calculated
using the lesser of (i) the  appraised value of the related Mortgaged  Property,
as  established by an appraisal obtained by  the originator from an appraiser at
the time of  origination and  (ii) the  sale price  for such  property. In  some
instances,  the  Loan-to-Value  Ratio may  be  based  on an  appraisal  that was
obtained by the originator more than four months prior to origination,  provided
that  (i) a recertification of  the original appraisal is  obtained and (ii) the
original appraisal was obtained no more than twelve months prior to origination.
For the purpose of calculating the Loan-to-Value Ratio of any Mortgage Loan that
is the result of the refinancing (including a refinancing for "equity  take-out"
purposes)  of  an existing  mortgage loan,  the appraised  value of  the related
Mortgaged Property is generally determined by reference to an appraisal obtained
in connection  with the  origination of  the replacement  loan. See  "The  Trust
Estates--Mortgage  Loans" in the Prospectus. As of  March 15, 1996, seven of the
Mortgage Loans  having Loan-to-Value  Ratios at  origination in  excess of  80%,
representing  approximately 1.46% of  the Aggregate Unpaid  Principal Balance of
the Mortgage  Loans, were  originated without  primary mortgage  insurance.  See
"PHMC--Mortgage Loan Underwriting" in the Prospectus.
 
                                     S1-11
<PAGE>
                       MORTGAGE LOAN DOCUMENTATION LEVELS
 
<TABLE>
<CAPTION>
                                                                       PERCENTAGE OF
                                                         AGGREGATE       AGGREGATE
                                          NUMBER OF       UNPAID           UNPAID
                                          MORTGAGE       PRINCIPAL       PRINCIPAL
DOCUMENTATION LEVEL                         LOANS         BALANCE         BALANCE
- ----------------------------------------  ---------   ---------------  --------------
<S>                                       <C>         <C>              <C>
Full Documentation......................     244      $ 49,089,101.78       53.23   %
Asset & Income Verification.............       4           584,755.26        0.63
Asset & Mortgage Verification...........     152        20,378,868.65       22.10
Income & Mortgage Verification..........       2           330,256.93        0.36
Asset Verification......................      35         4,118,886.71        4.47
Income Verification.....................       3           218,707.86        0.24
Mortgage Verification...................      98        13,697,796.12       14.85
Preferred Processing....................      37         3,800,140.83        4.12
                                             ---      ---------------     -------
        Total...........................     575      $ 92,218,514.14      100.00   %
                                             ---      ---------------     -------
                                             ---      ---------------     -------
</TABLE>
 
Documentation levels vary depending upon several factors, including loan amount,
Loan-to-Value Ratio and the type and purpose of the Mortgage Loan. Asset, income
and mortgage verifications were obtained for Mortgage Loans processed with "full
documentation." In the case of "preferred processing," neither asset, income nor
mortgage  verifications were obtained.  However, for all  of the Mortgage Loans,
verification of the borrower's employment, a credit report on the borrower and a
property appraisal were obtained. See "PHMC--Mortgage Loan Underwriting" in  the
Prospectus.
 
                   ORIGINAL MORTGAGE LOAN PRINCIPAL BALANCES
 
<TABLE>
<CAPTION>
                                                                       PERCENTAGE OF
                                                         AGGREGATE       AGGREGATE
                ORIGINAL                  NUMBER OF       UNPAID           UNPAID
             MORTGAGE LOAN                MORTGAGE       PRINCIPAL       PRINCIPAL
           PRINCIPAL BALANCE                LOANS         BALANCE         BALANCE
          --------------------            ---------   ---------------  --------------
<S>                                       <C>         <C>              <C>
Less than or equal to $200,000..........     295      $ 24,123,928.80       26.16   %
$200,001-$250,000.......................      96        18,082,795.39       19.61
$250,001-$300,000.......................      98        22,264,337.12       24.14
$300,001-$350,000.......................      40        10,421,986.52       11.30
$350,001-$400,000.......................      20         6,216,221.90        6.74
$400,001-$450,000.......................       6         2,017,939.78        2.19
$450,001-$500,000.......................       7         2,793,569.00        3.03
$500,001-$550,000.......................       3           471,913.43        0.51
$550,001-$600,000.......................       5         2,399,233.42        2.60
$600,001-$650,000.......................       1           527,403.11        0.57
$700,001-$750,000.......................       1           634,988.06        0.69
$800,001-$850,000.......................       1           672,968.25        0.73
$900,001-$950,000.......................       1           792,293.23        0.86
$950,001-$1,000,000.....................       1           798,936.13        0.87
                                             ---      ---------------     -------
        Total...........................     575      $ 92,218,514.14      100.00   %
                                             ---      ---------------     -------
                                             ---      ---------------     -------
</TABLE>
 
As of March 15, 1996, the average Unpaid Principal Balance of the Mortgage Loans
was  approximately  $160,380.  As  of  March  15,  1996,  the  weighted  average
Loan-to-Value Ratio  at  origination  and the  maximum  Loan-to-Value  Ratio  at
origination  of  the Mortgage  Loans which  had  original principal  balances in
excess of $600,000 were  approximately 60.7% and  70.0%, respectively. See  "The
Trust  Estates--Mortgage Loans"  and "PHMC--Mortgage  Loan Underwriting"  in the
Prospectus.
 
                                     S1-12
<PAGE>
                              MORTGAGED PROPERTIES
 
<TABLE>
<CAPTION>
                                                                       PERCENTAGE OF
                                                         AGGREGATE       AGGREGATE
                                          NUMBER OF       UNPAID           UNPAID
                                          MORTGAGE       PRINCIPAL       PRINCIPAL
PROPERTY                                    LOANS         BALANCE         BALANCE
- ----------------------------------------  ---------   ---------------  --------------
<S>                                       <C>         <C>              <C>
Single-family Detached..................     524      $ 86,829,027.15       94.15   %
Two- to four-family Units...............       9           636,536.01        0.69
Condominiums............................      34         4,010,681.63        4.35
Townhouses..............................       3           309,275.64        0.34
Planned Unit Developments...............       5           432,993.71        0.47
                                             ---      ---------------     -------
        Total...........................     575      $ 92,218,514.14      100.00   %
                                             ---      ---------------     -------
                                             ---      ---------------     -------
</TABLE>
 
                                     S1-13
<PAGE>
                GEOGRAPHIC DISTRIBUTION OF MORTGAGED PROPERTIES
 
<TABLE>
<CAPTION>
                                                                       PERCENTAGE OF
                                                         AGGREGATE       AGGREGATE
                                          NUMBER OF       UNPAID           UNPAID
                                          MORTGAGE       PRINCIPAL       PRINCIPAL
GEOGRAPHIC AREA                             LOANS         BALANCE         BALANCE
- ----------------------------------------  ---------   ---------------  --------------
<S>                                       <C>         <C>              <C>
Alabama.................................       4      $    951,308.64        1.03   %
Arizona.................................       9           555,521.82        0.60
California..............................     132        29,108,492.02       31.59
Colorado................................       7           874,412.88        0.95
Connecticut.............................      16         2,790,509.39        3.03
Delaware................................       1           306,782.63        0.33
District of Columbia....................       2           548,346.58        0.59
Florida.................................      39         5,345,694.19        5.80
Georgia.................................      11         1,120,030.07        1.21
Hawaii..................................       5           502,759.97        0.55
Illinois................................       8           991,185.58        1.07
Iowa....................................       1             7,066.86        0.01
Kansas..................................       1            31,423.65        0.03
Louisiana...............................       2           212,054.37        0.23
Maryland................................      19         3,470,799.61        3.76
Massachusetts...........................       9         1,167,230.50        1.27
Michigan................................       3           121,736.10        0.13
Minnesota...............................       8           792,770.16        0.86
Missouri................................       2           204,031.93        0.22
Montana.................................       2           243,285.16        0.26
Nebraska................................       2            43,211.23        0.05
Nevada..................................       5         1,670,939.31        1.81
New Hampshire...........................       2           269,004.06        0.29
New Jersey..............................      78        11,704,520.25       12.69
New York................................      97        13,545,603.29       14.69
North Carolina..........................       5           503,205.37        0.55
Ohio....................................       6           688,631.67        0.75
Oklahoma................................       2           334,968.92        0.36
Oregon..................................       4           314,640.16        0.34
Pennsylvania............................      21         2,336,031.21        2.53
Rhode Island............................       2           105,209.29        0.11
South Carolina..........................       2           459,118.53        0.50
Tennessee...............................       5           851,362.71        0.92
Texas...................................      29         4,705,493.23        5.10
Utah....................................       1           188,955.41        0.20
Vermont.................................       1            86,125.21        0.09
Virginia................................      22         3,925,184.52        4.26
Washington..............................       7           864,450.88        0.94
West Virginia...........................       3           276,416.78        0.30
                                             ---      ---------------     -------
        Total...........................     575      $ 92,218,514.14      100.00   %
                                             ---      ---------------     -------
                                             ---      ---------------     -------
</TABLE>
 
As of March 15, 1996, no more  than approximately 1.11% of the Aggregate  Unpaid
Principal  Balance of  the Mortgage  Loans was  secured by  Mortgaged Properties
located in any one zip code.
 
                                     S1-14
<PAGE>
                         ORIGINATORS OF MORTGAGE LOANS
 
<TABLE>
<CAPTION>
                                                                       PERCENTAGE OF
                                                         AGGREGATE       AGGREGATE
                                          NUMBER OF       UNPAID           UNPAID
                                          MORTGAGE       PRINCIPAL       PRINCIPAL
ORIGINATOR                                  LOANS         BALANCE         BALANCE
- ----------------------------------------  ---------   ---------------  --------------
<S>                                       <C>         <C>              <C>
PHMC or Affiliate.......................     280      $ 38,820,505.19       42.10   %
Other Originators.......................     295        53,398,008.95       57.90
                                             ---      ---------------     -------
        Total...........................     575      $ 92,218,514.14      100.00   %
                                             ---      ---------------     -------
                                             ---      ---------------     -------
</TABLE>
 
                           PURPOSES OF MORTGAGE LOANS
 
<TABLE>
<CAPTION>
                                                                       PERCENTAGE OF
                                                         AGGREGATE       AGGREGATE
                                          NUMBER OF       UNPAID           UNPAID
                                          MORTGAGE       PRINCIPAL       PRINCIPAL
LOAN PURPOSE                                LOANS         BALANCE         BALANCE
- ----------------------------------------  ---------   ---------------  --------------
<S>                                       <C>         <C>              <C>
Purchase................................      92      $ 11,007,794.07       11.94   %
Rate/term refinance.....................     396        67,647,543.50       73.35
Equity take out.........................      87        13,563,176.57       14.71
                                             ---      ---------------     -------
        Total...........................     575      $ 92,218,514.14      100.00   %
                                             ---      ---------------     -------
                                             ---      ---------------     -------
</TABLE>
 
In general,  in the  case of  a  Mortgage Loan  made for  "rate/term"  refinance
purposes,  substantially  all  of the  proceeds  are  used to  pay  in  full the
principal balance of a previous mortgage loan of the mortgagor with respect to a
Mortgaged Property and to pay origination and closing costs associated with such
refinancing. However, in the case of a Mortgage Loan made for "equity take  out"
refinance  purposes, all or a portion of  the proceeds are generally retained by
the mortgagor for uses unrelated to  the Mortgaged Property. The amount of  such
proceeds   retained  by  the  mortgagor  may  be  substantial.  See  "The  Trust
Estates--Mortgage  Loans"  and   "PHMC--Mortgage  Loan   Underwriting"  in   the
Prospectus.
 
                               DELINQUENCY STATUS
 
<TABLE>
<CAPTION>
                                                                       PERCENTAGE OF
                                                                         AGGREGATE
                                                       ACTUAL             UNPAID
                                      NUMBER OF        UNPAID            PRINCIPAL
                                      MORTGAGE        PRINCIPAL       BALANCE OF THE
STATUS                                LOANS(1)       BALANCE(1)      MORTGAGE LOANS(2)
- ------------------------------------  ---------   -----------------  -----------------
<S>                                   <C>         <C>                <C>
30 to 59 days.......................         5    $    1,021,825.01         1.11      %
60 to 89 days.......................         0                 0.00         0.00
90 days or more.....................         0                 0.00         0.00
Loans in Foreclosure................         1           223,701.21         0.24
REO Mortgage Loans..................         0                 0.00         0.00
                                             -
                                                  -----------------          ---
        Total.......................         6    $    1,245,526.22         1.35      %
                                             -
                                             -
                                                  -----------------          ---
                                                  -----------------          ---
</TABLE>
 
- ------------
(1) Reflects  the  number of  delinquent Mortgage  Loans  and the  actual unpaid
    principal balances of such Mortgage Loans based on information available  to
    the Servicer as of March 15, 1996.
 
(2) As of March 15, 1996.
 
The  indicated periods of delinquency are based  on the number of days past due,
based on a  30-day month. No  Mortgage Loan is  considered delinquent for  these
purposes until one month has passed since its contractual due date.
 
    On  January  17, 1994,  southern California  experienced an  earthquake (the
"Earthquake") and  thereafter  a number  of  aftershocks.  As a  result  of  the
Earthquake,  Los Angeles and  Ventura Counties (the  "Earthquake Counties") were
declared federal disaster  areas eligible  for federal  disaster assistance.  In
addition  to the Earthquake  Counties, other counties may  have been affected by
the Earthquake.  As of  March 15,  1996, approximately  9.95% of  the  Aggregate
Unpaid  Principal  Balance  of  the  Mortgage  Loans  was  secured  by Mortgaged
Properties that  are located  in the  Earthquake Counties.  The Seller  has  not
undertaken  the physical  inspection of any  Mortgaged Properties.  As a result,
there can be no assurance that material damage to any Mortgaged Property in  the
affected region has not occurred.
 
                                     S1-15
<PAGE>
    As  of January 16, 1995 and March 16,  1995, as a result of flooding, 38 and
49 counties in California, respectively, (the "January 1995 Flood Counties"  and
"March  1995  Flood  Counties,"  respectively,  and  together,  the  "1995 Flood
Counties") were declared  federal disaster areas  eligible for federal  disaster
assistance.  As of March 15, 1996,  approximately 29.16% of the Aggregate Unpaid
Principal Balance of the Mortgage Loans was secured by Mortgaged Properties that
are located in the January 1995  Flood Counties and approximately 27.25% of  the
Aggregate  Unpaid  Principal  Balance  of  the  Mortgage  Loans  was  secured by
Mortgaged Properties that  are located  in the  March 1995  Flood Counties.  The
Seller  has not undertaken the physical  inspection of any Mortgaged Properties.
As a result, there  can be no  assurance that material  damage to any  Mortgaged
Property in the affected region has not occurred.
 
    As  of  October 12,  1995, as  a  result of  a hurricane  affecting Georgia,
Alabama and  Florida (the  "Hurricane"), 28,  20 and  11 counties,  in  Georgia,
Alabama  and  Florida, respectively  (the  "Hurricane Counties"),  were declared
federal disaster areas eligible for federal disaster assistance. As of March 15,
1996, 1.92% of the Aggregate Unpaid Principal Balance of the Mortgage Loans  was
secured  by Mortgage Properties that are  located in the Hurricane Counties. The
Seller has not undertaken the  physical inspection of any Mortgaged  Properties.
As  a result, there  can be no  assurance that material  damage to any Mortgaged
Property in the affected region has not occurred.
 
    As of  March  8,  1996, as  a  result  of recent  flooding  (the  "Northeast
Floods"),  all counties in the Commonwealth of Pennsylvania, all counties in the
State of Maryland, 28 counties in the State of West Virginia, 28 counties in the
State of New York, 13 counties in  the Commonwealth of Virginia and 12  counties
in  the State  of Ohio  (the "Northeast  Flood Counties")  were declared federal
disaster areas eligible for federal disaster  assistance. As of March 15,  1996,
approximately  8.94% of the  Aggregate Unpaid Principal  Balance of the Mortgage
Loans was secured  by Mortgaged  Properties that  are located  in the  Northeast
Flood  Counties.  In  addition, other  counties  may  have been  and  may become
affected by the  Northeast Floods. The  Seller has not  undertaken the  physical
inspection  of any Mortgaged Properties. As a  result, there can be no assurance
that material damage to  any Mortgaged Property in  the affected region has  not
occurred.
 
    As  of February  28, 1996,  as a result  of recent  flooding (the "Northwest
Floods"), 26  counties in  the State  of Oregon,  21 counties  in the  State  of
Washington  and  10  counties  in  the  State  of  Idaho  (the  "Northwest Flood
Counties") were declared  federal disaster areas  eligible for federal  disaster
assistance.  As of March  15, 1996, approximately 1.28%  of the Aggregate Unpaid
Principal Balance of the Mortgage Loans was secured by Mortgage Properties  that
are  located in  the Northwest Flood  Counties. In addition,  other counties may
have been and may become  affected by the Northwest  Floods. The Seller has  not
undertaken  the physical  inspection of any  Mortgaged Properties.  As a result,
there can be no assurance that material damage to any Mortgaged Property in  the
affected region has not occurred.
 
    Based on information available to the Servicer as of March 15, 1996, four of
the  delinquent  Mortgage  Loans  shown  in  the  preceding  table, representing
approximately 0.94% of the  Aggregate Unpaid Principal  Balance of the  Mortgage
Loans or approximately $866,373, were secured by Mortgaged Properties located in
the  Earthquake Counties, the  Hurricane Counties, the  1995 Flood Counties, the
Northeast Flood Counties or the Northwest Flood Counties.
 
              ORIGINATION, DELINQUENCY AND FORECLOSURE EXPERIENCE
 
    During the years ended December 31, 1993, December 31, 1994 and December 31,
1995, PHMC originated or purchased, for its own account or for the account of an
affiliate, conventional mortgage loans having an aggregate principal balance  of
approximately $35,805,498,813, $16,201,648,701 and $11,488,362,184,
respectively.
 
    The   following  tables  reflect  delinquency,  foreclosure  and  loan  loss
experience of mortgage loans serviced by PHMC. As described under "Risk  Factors
and  Special Considerations--Recent Developments," PHMC  intends, as of the Sale
Date, to cease  its mortgage  loan origination and  servicing business.  Norwest
Mortgage,   as  subservicer  for  PHMC,   will  perform  foreclosure  and  other
realization  activities  in  connection   with  defaulted  Mortgage  Loans   and
Prudential   Asset  Recovery,  Inc.  or  another  third  party  contractor  will
administer and dispose of real estate acquired upon foreclosure.
 
    Certain information concerning PHMC's delinquency, foreclosure and loan loss
experience on  certain  categories of  the  mortgage loans  included  in  PHMC's
mortgage  loan  servicing  portfolio  for the  years  ended  December  31, 1990,
December 31, 1991  and the three  months ended March  31, 1992 is  set forth  in
"Origination,    Delinquency   and   Foreclosure   Experience--Delinquency   and
Foreclosure Experience" in the Prospectus  Supplement. The following tables  set
forth  such information as of December 31,  1993, December 31, 1994 and December
31, 1995.
 
                                     S1-16
<PAGE>
                              TOTAL PROGRAM LOANS
 
<TABLE>
<CAPTION>
                             AS OF                   AS OF                   AS OF
                       DECEMBER 31, 1993       DECEMBER 31, 1994       DECEMBER 31, 1995
                     ----------------------  ----------------------  ----------------------
                                 BY DOLLAR               BY DOLLAR               BY DOLLAR
                      BY NO.      AMOUNT      BY NO.      AMOUNT      BY NO.      AMOUNT
                     OF LOANS    OF LOANS    OF LOANS    OF LOANS    OF LOANS    OF LOANS
                     --------   -----------  --------   -----------  --------   -----------
<S>                  <C>        <C>          <C>        <C>          <C>        <C>
                                         (DOLLAR AMOUNTS IN THOUSANDS)
 
Total Portfolio of
 Program Loans.....   337,156   $57,687,887   379,075   $62,175,544   423,895   $65,496,977
                     --------   -----------  --------   -----------  --------   -----------
                     --------   -----------  --------   -----------  --------   -----------
Period of
 Delinquency(1)
  30 to 59 days....     3,190   $   489,235     3,548   $   548,524     5,103   $   710,246
  60 to 89 days....       703       109,529       797       128,053       959       141,847
  90 days or
  more.............     1,398       271,637     1,418       308,124       729       122,554
                     --------   -----------  --------   -----------  --------   -----------
Total Delinquent
 Loans.............     5,291   $   870,401     5,763   $   984,701     6,791   $   974,647
                     --------   -----------  --------   -----------  --------   -----------
                     --------   -----------  --------   -----------  --------   -----------
Percent of
 Portfolio.........      1.57%         1.51%     1.52%         1.58%     1.60%         1.49%
</TABLE>
<TABLE>
<CAPTION>
                                         AS OF                AS OF                AS OF
                                   DECEMBER 31, 1993    DECEMBER 31, 1994    DECEMBER 31, 1995
                                   ------------------   ------------------   ------------------
<S>                                <C>                  <C>                  <C>
                                                  (DOLLAR AMOUNTS IN THOUSANDS)
 
Foreclosures(2)..................  $     277,533        $     354,028        $     360,645
Foreclosure Ratio(3).............           0.48%                0.57%                0.55%
 
<CAPTION>
 
                                       YEAR ENDED           YEAR ENDED           YEAR ENDED
                                   DECEMBER 31, 1993    DECEMBER 31, 1994    DECEMBER 31, 1995
                                   ------------------   ------------------   ------------------
                                                  (DOLLAR AMOUNTS IN THOUSANDS)
<S>                                <C>                  <C>                  <C>
 
Net Gain (Loss)(4)...............  $    (112,507)       $    (194,956)       $    (228,775)
Net Gain (Loss) Ratio(5).........          (0.20)%              (0.31)%              (0.35)%
</TABLE>
 
- ------------
(1) The indicated periods of  delinquency are based on  the number of days  past
    due,  based on a 30-day month. No mortgage loan is considered delinquent for
    these purposes until one month has passed since its contractual due date.  A
    mortgage   loan  is   no  longer  considered   delinquent  once  foreclosure
    proceedings have commenced.
 
(2) Includes loans in the applicable portfolio for which foreclosure proceedings
    had been instituted or with respect  to which the related property had  been
    acquired as of the dates indicated.
 
(3) Foreclosures  as a percentage of total  loans in the applicable portfolio at
    the end of each period.
 
(4) Does not  include gain  or loss  with  respect to  loans in  the  applicable
    portfolio  for  which foreclosure  proceedings had  been instituted  but not
    completed as of  the dates indicated,  or for which  the related  properties
    have been acquired in foreclosure proceedings but not yet sold.
 
(5) Net  gain (loss) as a percentage of  total loans in the applicable portfolio
    at the end of each period.
 
                                     S1-17
<PAGE>
                              FIXED PROGRAM LOANS
 
<TABLE>
<CAPTION>
                                                   AS OF                     AS OF                     AS OF
                                             DECEMBER 31, 1993         DECEMBER 31, 1994         DECEMBER 31, 1995
                                          -----------------------   -----------------------   -----------------------
                                                      BY DOLLAR                 BY DOLLAR                 BY DOLLAR
                                           BY NO.       AMOUNT       BY NO.       AMOUNT       BY NO.       AMOUNT
                                          OF LOANS     OF LOANS     OF LOANS     OF LOANS     OF LOANS     OF LOANS
                                          --------   ------------   --------   ------------   --------   ------------
                                                                 (DOLLAR AMOUNTS IN THOUSANDS)
 
<S>                                       <C>        <C>            <C>        <C>            <C>        <C>
Total Portfolio of Fixed Program
 Loans..................................   288,556   $ 48,156,806    307,975   $ 48,602,956    358,021   $ 53,576,591
                                          --------   ------------   --------   ------------   --------   ------------
                                          --------   ------------   --------   ------------   --------   ------------
Period of Delinquency(1)
  30 to 59 days.........................     2,609   $    380,197      2,708   $    389,236      4,101   $    528,824
  60 to 89 days.........................       571         86,136        591         87,687        743         98,269
  90 days or more.......................     1,117        211,870        965        188,414        545         82,595
                                          --------   ------------   --------   ------------   --------   ------------
Total Delinquent Loans..................     4,297   $    678,203      4,264   $    665,337      5,389   $    709,688
                                          --------   ------------   --------   ------------   --------   ------------
                                          --------   ------------   --------   ------------   --------   ------------
Percent of Fixed Program Loan
 Portfolio..............................      1.49%          1.41%      1.38%          1.37%      1.51%          1.32%
</TABLE>
<TABLE>
<CAPTION>
                                               AS OF             AS OF              AS OF
                                           DECEMBER 31,       DECEMBER 31,      DECEMBER 31,
                                               1993               1994              1995
                                          ---------------   ----------------   ---------------
                                                     (DOLLAR AMOUNTS IN THOUSANDS)
 
<S>                                       <C>               <C>                <C>
Foreclosures(2).........................  $  195,361        $   208,253        $  218,951
Foreclosure Ratio(3)....................        0.41%              0.43%             0.41%
 
<CAPTION>
 
                                            YEAR ENDED         YEAR ENDED        YEAR ENDED
                                           DECEMBER 31,       DECEMBER 31,      DECEMBER 31,
                                               1993               1994              1995
                                          ---------------   ----------------   ---------------
                                                     (DOLLAR AMOUNTS IN THOUSANDS)
<S>                                       <C>               <C>                <C>
 
Net Gain (Loss)(4)......................  $  (63,705)       $  (133,523)       $ (164,734)
Net Gain (Loss) Ratio(5)................       (0.13)%            (0.27)%           (0.31)%
</TABLE>
 
- ------------
(1) The indicated periods of  delinquency are based on  the number of days  past
    due,  based on a 30-day month. No mortgage loan is considered delinquent for
    these purposes until one month has passed since its contractual due date.  A
    mortgage   loan  is   no  longer  considered   delinquent  once  foreclosure
    proceedings have commenced.
 
(2) Includes loans in the applicable portfolio for which foreclosure proceedings
    had been instituted or with respect  to which the related property had  been
    acquired as of the dates indicated.
 
(3) Foreclosures  as a percentage of total  loans in the applicable portfolio at
    the end of each period.
 
(4) Does not  include gain  or loss  with  respect to  loans in  the  applicable
    portfolio  for  which foreclosure  proceedings had  been instituted  but not
    completed as of  the dates indicated,  or for which  the related  properties
    have been acquired in foreclosure proceedings but not yet sold.
 
(5) Net  gain (loss) as a percentage of  total loans in the applicable portfolio
    at the end of each period.
 
                                     S1-18
<PAGE>
                   FIXED 15-YEAR NON-RELOCATION PROGRAM LOANS
 
<TABLE>
<CAPTION>
                                               AS OF                   AS OF                   AS OF
                                         DECEMBER 31, 1993       DECEMBER 31, 1994       DECEMBER 31, 1995
                                       ----------------------  ----------------------  ----------------------
                                                   BY DOLLAR               BY DOLLAR               BY DOLLAR
                                        BY NO.      AMOUNT      BY NO.      AMOUNT      BY NO.      AMOUNT
                                       OF LOANS    OF LOANS    OF LOANS    OF LOANS    OF LOANS    OF LOANS
                                       --------   -----------  --------   -----------  --------   -----------
                                                           (DOLLAR AMOUNTS IN THOUSANDS)
 
<S>                                    <C>        <C>          <C>        <C>          <C>        <C>
Total Portfolio of Fixed 15-Year Non-
 relocation Program Loans............   90,000    $12,652,480   94,356    $12,484,270   97,803    $12,143,242
                                       --------   -----------  --------   -----------  --------   -----------
                                       --------   -----------  --------   -----------  --------   -----------
Period of Delinquency(1)
  30 to 59 days......................      374    $    43,570      399    $    50,230      664    $    71,238
  60 to 89 days......................       53          5,259       61          7,853       97         11,191
  90 days or more....................       94         14,256      106         19,237       69          9,051
                                       --------   -----------  --------   -----------  --------   -----------
Total Delinquent Loans...............      521    $    63,085      566    $    77,320      830    $    91,480
                                       --------   -----------  --------   -----------  --------   -----------
                                       --------   -----------  --------   -----------  --------   -----------
Percent of Fixed 15-Year
 Non-relocation Program Loan
 Portfolio...........................     0.58%          0.50%    0.60%          0.62%    0.85%          0.75%
</TABLE>
<TABLE>
<CAPTION>
                                                AS OF               AS OF               AS OF
                                          DECEMBER 31, 1993   DECEMBER 31, 1994   DECEMBER 31, 1995
                                          -----------------   -----------------   -----------------
                                                        (DOLLAR AMOUNTS IN THOUSANDS)
 
<S>                                       <C>                 <C>                 <C>
Foreclosures(2).........................  $   16,567          $   17,331          $   18,888
Foreclosure Ratio(3)....................       0.13%               0.14%               0.16%
 
<CAPTION>
 
                                             YEAR ENDED          YEAR ENDED          YEAR ENDED
                                          DECEMBER 31, 1993   DECEMBER 31, 1994   DECEMBER 31, 1995
                                          -----------------   -----------------   -----------------
                                                        (DOLLAR AMOUNTS IN THOUSANDS)
<S>                                       <C>                 <C>                 <C>
 
Net Gain (Loss)(4)......................  $   (3,789)         $   (5,280)         $   (9,497)
Net Gain (Loss) Ratio(5)................       (0.03)%             (0.04)%             (0.08)%
</TABLE>
 
- ------------
(1) The indicated periods of  delinquency are based on  the number of days  past
    due,  based on a 30-day month. No mortgage loan is considered delinquent for
    these purposes until one month has passed since its contractual due date.  A
    mortgage   loan  is   no  longer  considered   delinquent  once  foreclosure
    proceedings have commenced.
 
(2) Includes loans in the applicable portfolio for which foreclosure proceedings
    had been instituted or with respect  to which the related property had  been
    acquired as of the dates indicated.
 
(3) Foreclosures  as a percentage of total  loans in the applicable portfolio at
    the end of each period.
 
(4) Does not  include gain  or loss  with  respect to  loans in  the  applicable
    portfolio  for  which foreclosure  proceedings had  been instituted  but not
    completed as of  the dates indicated,  or for which  the related  properties
    have been acquired in foreclosure proceedings but not yet sold.
 
(5) Net  gain (loss) as a percentage of  total loans in the applicable portfolio
    at the end of each period.
 
                                     S1-19
<PAGE>
            RESTRICTIONS ON TRANSFER OF THE CLASS A-10 CERTIFICATES
 
    Class A-10 Certificates with denominations of less than $222,634,000 initial
Class A-10  Notional Amount  but not  less than  $9,087,000 initial  Class  A-10
Notional  Amount may  be transferred  to persons who  deliver to  the Trustee an
affidavit stating  that such  person: (a)(i)  is a  substantial,  sophisticated,
institutional investor having knowledge and experience in financial and business
matters,  and in particular in such matters related to securities similar to the
Class A-10 Certificates, such  that such investor is  capable of evaluating  the
merits and risks of an investment in the Class A-10 Certificates, and (ii) has a
net  worth of at least $10,000,000; or (b) will hold the Class A-10 Certificates
solely as nominee for a person meeting the criteria set forth in clause (a).
 
                             HISTORICAL PREPAYMENTS
 
    The prepayment  model used  in  the Prospectus  Supplement is  the  Standard
Prepayment  Assumption ("SPA"). See "Prepayment and Yield Considerations" in the
Prospectus Supplement. An alternative  model is a conditional  (also known as  a
constant)  prepayment  rate  ("CPR").  CPR  represents  a  rate  of  payment  of
unscheduled principal on mortgage loans,  expressed as an annualized  percentage
of  the outstanding principal balance of such mortgage loans at the beginning of
each period. CPR DOES NOT PURPORT  TO BE A HISTORICAL DESCRIPTION OF  PREPAYMENT
EXPERIENCE  OR A PREDICTION OF THE ANTICIPATED RATE OF PREPAYMENT OF ANY POOL OF
MORTGAGE LOANS, INCLUDING THE MORTGAGE LOANS.
 
    The Series 1992-13 Certificates were issued on May 8, 1992. Set forth  below
are the approximate annualized prepayment rates of the Mortgage Loans underlying
the  Series 1992-13 Certificates as  a percentage of CPR  as of the Distribution
Dates occurring in the indicated months.
 
                          HISTORICAL PREPAYMENT RATES
<TABLE>
<CAPTION>
MONTH                                                           PERCENTAGE OF CPR
- --------------------------------------------------------------  -----------------
<S>                                                             <C>
June 1992.....................................................        1.64%
July 1992.....................................................        0.70%
August 1992...................................................        1.87%
September 1992................................................        7.72%
October 1992..................................................       15.14%
November 1992.................................................       16.34%
December 1992.................................................        5.47%
January 1993..................................................        6.05%
February 1993.................................................       13.40%
March 1993....................................................       14.45%
April 1993....................................................       19.73%
May 1993......................................................       50.54%
June 1993.....................................................       49.44%
July 1993.....................................................       45.78%
August 1993...................................................       51.49%
September 1993................................................       59.17%
October 1993..................................................       67.41%
November 1993.................................................       79.06%
December 1993.................................................       84.43%
January 1994..................................................       84.42%
February 1994.................................................       63.08%
March 1994....................................................       54.17%
April 1994....................................................       53.72%
 
<CAPTION>
MONTH                                                           PERCENTAGE OF CPR
- --------------------------------------------------------------  -----------------
<S>                                                             <C>
May 1994......................................................       30.72%
June 1994.....................................................       21.99%
July 1994.....................................................       19.84%
August 1994...................................................       17.55%
September 1994................................................       13.13%
October 1994..................................................        4.73%
November 1994.................................................        5.63%
December 1994.................................................       14.99%
January 1995..................................................        8.80%
February 1995.................................................       11.84%
March 1995....................................................        7.22%
April 1995....................................................        8.36%
May 1995......................................................        5.59%
June 1995.....................................................        4.72%
July 1995.....................................................        7.95%
August 1995...................................................        8.12%
September 1995................................................       16.87%
October 1995..................................................       27.65%
November 1995.................................................       19.03%
December 1995.................................................        8.86%
January 1996..................................................       10.61%
February 1996.................................................       11.85%
March 1996....................................................        7.41%
</TABLE>
 
    The prepayment rates described above were calculated based upon the weighted
average Mortgage Interest Rate  of the Mortgage Loans  for the applicable  month
and  an assumed  weighted average  remaining term  to maturity  for the Mortgage
Loans equal to the weighted  average remaining term to  maturity at the date  of
the  initial issuance  of the Series  1992-13 Certificates with  respect to June
1992, reduced by one month for each month thereafter. The prepayment history  of
the  Mortgage  Loans underlying  the Series  1992-13 Certificates  is relatively
short and cannot be relied  upon as an indicator of  the rate of prepayments  on
the  Mortgage  Loans  to  be  experienced  over  the  life  of  the  Class  A-10
Certificates. Further, the rate of prepayment of a pool of mortgage loans during
any period should be considered in light of the amount of time elapsed since the
origination of such mortgage loans and  the absolute levels of, and changes  in,
prevailing market interest rates during such period. For a further discussion of
the factors affecting the rate of prepayments on mortgage loans, see "Prepayment
and  Yield Considerations" in the Prospectus  Supplement. INVESTORS ARE URGED TO
MAKE AN INDEPENDENT DECISION AS TO THE APPROPRIATE PREPAYMENT ASSUMPTIONS TO  BE
USED IN DECIDING WHETHER TO PURCHASE A CLASS A-10 CERTIFICATE.
 
                                     S1-20
<PAGE>
                 SENSITIVITY OF THE PRE-TAX YIELD AND WEIGHTED
                  AVERAGE LIFE OF THE CLASS A-10 CERTIFICATES
 
    The  Prospectus Supplement and the  Prospectus contain important information
concerning factors that will affect the  yield and weighted average life of  the
Class  A-10  Certificates. Investors  are urged  to  read "Prepayment  and Yield
Considerations" in the Prospectus Supplement and the Prospectus.
 
    THE YIELD TO INVESTORS IN THE CLASS A-10 CERTIFICATES, WHICH CURRENTLY  HAVE
NO  PRINCIPAL  BALANCE AND  ARE  ONLY ENTITLED  TO  DISTRIBUTIONS IN  RESPECT OF
INTEREST WILL BE HIGHLY SENSITIVE TO  BOTH THE TIMING OF RECEIPT OF  PREPAYMENTS
AND THE OVERALL RATE OF PRINCIPAL PREPAYMENT ON THE MORTGAGE LOANS, PARTICULARLY
WITH  RESPECT  TO THOSE  MORTGAGE  LOANS WITH  HIGHER  RATES OF  INTEREST, WHICH
OVERALL RATE MAY FLUCTUATE SIGNIFICANTLY FROM  TIME TO TIME. AN INVESTOR IN  THE
CLASS  A-10 CERTIFICATES SHOULD  FULLY CONSIDER THE  ASSOCIATED RISKS, INCLUDING
THE RISK THAT A RAPID RATE  OF PRINCIPAL PAYMENTS (INCLUDING PREPAYMENTS)  COULD
RESULT IN THE FAILURE OF SUCH INVESTOR TO FULLY RECOVER ITS INITIAL INVESTMENT.
 
    For  purposes of the table  set forth below, the  weighted average life of a
Class A-10 Certificate is the average amount of time that will elapse from April
26, 1996 until each dollar in reduction  of the principal balance of the  Series
1992-13 Certificates is distributed to the holders thereof. The weighted average
life  of the Class A-10 Certificates will  be influenced by, among other things,
the rate and timing of principal payments on the Mortgage Loans, which may be in
the form of scheduled amortization or prepayments.
 
    The following table has been prepared on the basis of the characteristics of
the Mortgage  Loans included  in  the Trust  Estate as  of  March 15,  1996,  as
described  above under "Description of the  Mortgage Loans," adjusted to reflect
calculated payments of principal on April 1, 1996 assuming a constant prepayment
rate equal to 0% CPR for the month of March 1996. This adjustment has the effect
of reducing the remaining terms to stated maturity of each Mortgage Loan by  one
month  from the  table shown  on page S1-10.  The following  table indicates the
sensitivity to various rates of prepayment on the Mortgage Loans of the  pre-tax
yield  to maturity,  on a  corporate bond equivalent  ("CBE") basis,  and of the
weighted average life of the Class  A-10 Certificates at various percentages  of
CPR.  Such  calculations  are based  on  distributions made  in  accordance with
"Description of the Certificates"  herein and in  the Prospectus Supplement,  on
the  assumptions described in clauses  (i), (iii) and (v)  of the last paragraph
beginning on  page  S-56  of  the Prospectus  Supplement,  and  on  the  further
assumptions  that (i) the Class A-10 Certificates will be purchased on April 26,
1996 for an aggregate  purchase price equal  to approximately $1,306,534,  which
includes  accrued interest from April  1, 1996 to (but  not including) April 26,
1996, (ii) distributions to holders of  Class A-10 Certificates will be made  on
the  25th day  of each  month commencing  in May  1996, (iii)  scheduled monthly
payments of principal and interest on the Mortgage Loans will be timely received
on the first day of each month  (with no defaults) commencing in May 1996,  (iv)
principal  prepayments on the Mortgage Loans will be received on the last day of
each month commencing  in April 1996  at the respective  percentages of CPR  set
forth  in the  table and  there are no  Prepayment Interest  Shortfalls, (v) the
Class A-10 Notional Amount applicable to the Distribution Date occurring in  May
1996  will be approximately $91,790,969 and  (vi) the Class A Subclass Principal
Balance of the Class A-10 Certificates as of the Determination Date occurring in
May 1996 will be $0.
 
           SENSITIVITY OF THE PRE-TAX YIELD AND WEIGHTED AVERAGE LIFE
                 OF THE CLASS A-10 CERTIFICATES TO PREPAYMENTS
 
<TABLE>
<CAPTION>
                                                   PERCENTAGES OF CPR
                                        ----------------------------------------
                                         5%     10%    15%    20%    25%    30%
                                        -----  -----  -----  -----  -----  -----
<S>                                     <C>    <C>    <C>    <C>    <C>    <C>
Pre-Tax Yield to Maturity (CBE).......  31.24% 25.30% 19.19% 12.89%  6.38% (0.36)%
Weighted Average Life (years).........   5.23   4.36   3.67   3.11   2.66   2.30
</TABLE>
 
    The pre-tax yields set forth in  the preceding table were calculated by  (i)
determining the monthly discount rates which, when applied to the assumed stream
of  cash  flows to  be  paid on  the Class  A-10  Certificates, would  cause the
discounted present  value of  such assumed  stream  of cash  flows to  equal  an
assumed  purchase  price  for  the  Class  A-10  Certificates  of  approximately
$1,306,534 which  includes accrued  interest  from April  1,  1996 to  (but  not
 
                                     S1-21
<PAGE>
including)  April 26, 1996, and (ii)  converting such monthly rates to corporate
bond equivalent rates. Such calculation does not take into account the  interest
rates  at  which an  investor may  be able  to reinvest  funds received  by such
investor as distributions on the  Class A-10 Certificates and consequently  does
not  purport  to  reflect  the  return  on  any  investment  in  the  Class A-10
Certificates when such reinvestment rates are considered.
 
    The weighted average lives of the  Class A-10 Certificates set forth in  the
preceding   table  were  determined  by  (i)  multiplying  the  amount  of  each
distribution in  reduction  of  the  principal balance  of  the  Series  1992-13
Certificates  by  the  number  of  years from  April  26,  1996  to  the related
Distribution Date, (ii)  adding the results  and (iii) dividing  the sum by  the
aggregate  distributions in  reduction of  the principal  balance of  the Series
1992-13 Certificates referred to in clause (i).
 
    NOTWITHSTANDING THE  ASSUMED PREPAYMENT  RATES  REFLECTED IN  THE  PRECEDING
TABLE, IT IS HIGHLY UNLIKELY THAT THE MORTGAGE LOANS WILL PREPAY AT ANY CONSTANT
RATE,  THAT THE MORTGAGE LOANS WILL PREPAY AT THE SAME RATE OR THAT THE MORTGAGE
LOANS WILL NOT EXPERIENCE ANY LOSSES. As a result of these factors, the  pre-tax
yield  and weighted average  life of the  Class A-10 Certificates  are likely to
differ from those shown in such table, even if all of the Mortgage Loans  prepay
at the indicated percentages of CPR.
 
                    CERTAIN FEDERAL INCOME TAX CONSEQUENCES
 
    An election has been made to treat the Trust Estate as a REMIC (the "REMIC")
for federal income tax purposes. The Class A-1, Class A-2, Class A-3, Class A-4,
Class  A-5,  Class  A-6,  Class  A-7,  Class  A-8,  Class  A-9  and  Class  A-10
Certificates, the Class M Certificates and  the Class B-1, Class B-2, Class  B-3
and  Class B-4 Certificates are designated as the regular interests in the REMIC
and the Class  A-R Certificate  is designated as  the residual  interest in  the
REMIC.  The Proposed  REMIC Regulations  discussed in  the Prospectus  under the
heading  "Certain   Federal   Income  Tax   Consequences--Federal   Income   Tax
Consequences  for REMIC Certificates"  were finalized in  substantially the same
form on December 23, 1992.
 
    The Class A-10 Certificates are treated as "qualifying real property  loans"
for  mutual savings banks and domestic  building and loan associations, "regular
interests in a  REMIC" for  domestic building  and loan  associations and  "real
estate assets" for real estate investment trusts, to the extent described in the
Prospectus.
 
    The  Class  A-10  Certificates  generally are  treated  as  debt instruments
originated on the date of original  issuance of the Series 1992-13  Certificates
for  federal income tax purposes. Holders of the Class A-10 Certificates will be
required to  report income  thereon in  accordance with  the accrual  method  of
accounting.  The  Proposed  OID  Regulations discussed  in  the  Prospectus were
withdrawn by subsequently  proposed Treasury regulations  on December 22,  1992.
Final  and temporary Treasury regulations regarding original issue discount (the
"OID Regulations")  were  issued on  February  2,  1994. Although  there  is  no
directly applicable authority with respect to the issuance of the Series 1992-13
Certificates,  the Seller  believes that the  Class A-10  Certificates should be
considered to have been issued with  original issue discount in an amount  equal
to  the excess  of all  distributions of principal  and interest  expected to be
received thereon  over  their issue  price  (including accrued  interest).  This
treatment  is consistent  with the  OID Regulations.  Any "negative"  amounts of
original issue discount  on the  Class A-10 Certificates  attributable to  rapid
prepayments  will not be deductible currently,  but may be offset against future
positive accruals of original issue discount, if any. The holder of a Class A-10
Certificate may be entitled to a loss deduction to the extent it becomes certain
that such holder will not  recover a portion of  its basis in such  Certificate,
assuming  no further prepayments.  The Seller makes no  representation as to the
timing or amount of such losses, if any, or how any such losses will be reported
to the holders. See "Certain Federal Income Tax Consequences--Federal Income Tax
Consequences for REMIC Certificates--Taxation of Regular  Certificates--Original
Issue  Discount" in  the Prospectus.  The adjusted issue  price of  a Class A-10
Certificate as of  the date of  purchase by  an investor is  its original  issue
price,  plus original issue discount accrued since the date of original issuance
of the Series 1992-13 Certificates, less distributions made, and losses, if any,
incurred, on the Class A-10 Certificates since the date of original issuance  of
the  Series 1992-13 Certificates. A purchase  price for a Class A-10 Certificate
that is less than or  greater than the adjusted issue  price of such Class  A-10
Certificate will result in market discount or acquisition premium, respectively,
to  the beneficial owner thereof, as  discussed in the Prospectus under "Certain
Federal Income  Tax  Consequences--Federal  Income Tax  Consequences  for  REMIC
Certificates--Taxation of Regular Certificates."
 
                                     S1-22
<PAGE>
    The  Prepayment Assumption  that is  to be used  in determining  the rate of
accrual of original  issue discount is  set forth in  the Prospectus  Supplement
under    "Federal   Income   Tax   Considerations--Regular   Certificates."   No
representation is made as to  the actual rate at  which the Mortgage Loans  will
prepay.
 
    See "Summary Information--Federal Income Tax Status" and "Federal Income Tax
Considerations"  in the  Prospectus Supplement  and "Certain  Federal Income Tax
Consequences--Federal Income  Tax Consequences  for REMIC  Certificates" in  the
Prospectus.
 
                                  UNDERWRITING
 
    Subject to the terms and conditions of an underwriting agreement and a terms
agreement  (together, the "Underwriting  Agreement") among the  Seller, PHMC and
PaineWebber Incorporated,  as underwriter  (the "Underwriter")  and, as  to  the
terms  agreement,  Prudential  Insurance, the  Class  A-10  Certificates offered
hereby are being purchased from the Seller by the Underwriter on or about  April
26,  1996.  The Underwriter  is  committed to  purchase  all of  the  Class A-10
Certificates offered hereby if  any Class A-10  Certificates are purchased.  The
Underwriter  has advised  the Seller  that it proposes  to offer  the Class A-10
Certificates, from  time  to  time,  for  sale  in  negotiated  transactions  or
otherwise  at prices determined at the time of sale. Proceeds to the Seller from
the sale of the Class A-10  Certificates are expected to be approximately  1.38%
of  the Pool Scheduled Principal Balance as of the Distribution Date in May 1996
without  giving  effect  to  partial   principal  prepayments  or  net   partial
liquidation  proceeds received on or after the Determination Date in April 1996,
plus accrued interest from April 1, 1996 to (but not including) April 26,  1996.
The  Underwriter and  any dealers that  participate with the  Underwriter in the
distribution of the Class  A-10 Certificates may be  deemed to be  underwriters,
and  any discounts or commissions received by  them and any profit on the resale
of Class A-10 Certificates by them may be deemed to be underwriting discounts or
commissions under the Securities Act of 1933, as amended (the "Securities Act").
 
    The Underwriting Agreement  provides that  the Seller,  PHMC and  Prudential
Insurance will indemnify the Underwriter against certain civil liabilities under
the  Securities  Act or  contribute  to payments  which  the Underwriter  may be
required to make in respect thereof.
 
                                SECONDARY MARKET
 
    There will  not be  any secondary  market for  the Class  A-10  Certificates
offered  hereby prior to the offering thereof. The Underwriter intends to act as
a market maker in the Class A-10 Certificates, subject to applicable  provisions
of  federal and state securities laws  and other regulatory requirements, but is
under no obligation to do so. There can be no assurance that a secondary  market
in  the Class A-10 Certificates will develop  or, if such a market does develop,
that it  will provide  holders  of Class  A-10  Certificates with  liquidity  of
investment   at  any  particular  time  or  for  the  life  of  the  Class  A-10
Certificates.
 
                              ERISA CONSIDERATIONS
 
    As described in the Prospectus  under "ERISA Considerations," ERISA and  the
Code  impose certain duties and restrictions on  any person which is an employee
benefit plan  within the  meaning of  Section 3(3)  of the  Employee  Retirement
Income  Security Act of 1974, as amended  ("ERISA"), or Code Section 4975 or any
person utilizing the assets of such employee benefit plan (an "ERISA Plan")  and
certain  persons who  perform services  for ERISA  Plans. Comparable  duties and
restrictions may exist under federal, state or local laws ("Similar Law"), which
are, to a material  extent, similar to  the foregoing sections  of ERISA or  the
Code,  on governmental  plans and  on certain  persons who  perform services for
governmental plans. For example, unless exempted, investment by an ERISA Plan in
the Class A-10 Certificates may constitute a prohibited transaction under ERISA,
the Code  or Similar  Law. There  are certain  exemptions issued  by the  United
States  Department of Labor (the "DOL") that  may be applicable to an investment
by an  ERISA Plan  in  the Class  A-10  Certificates, including  the  individual
administrative  exemption  described  below  and  Prohibited  Transaction  Class
Exemption 83-1 ("PTE 83-1"). For a further discussion of PTE 83-1, including the
necessary conditions to  its applicability,  and other important  factors to  be
considered   by  an  ERISA  Plan  contemplating  investing  in  the  Class  A-10
Certificates, see "ERISA Considerations" in the Prospectus.
 
                                     S1-23
<PAGE>
    On  June  25,  1990,  the  DOL  issued  to  the  Underwriter  an  individual
administrative  exemption, Prohibited Transaction Exemption  90-36, 55 Fed. Reg.
25903 (the "Exemption"),  from certain  of the prohibited  transaction rules  of
ERISA  with  respect to  the initial  purchase, the  holding and  the subsequent
resale by an  ERISA Plan of  certificates in pass-through  trusts that meet  the
considerations  and requirements of the Exemption.  The Exemption might apply to
the acquisition, holding and resale of  the Class A-10 Certificates by an  ERISA
Plan, provided that specified conditions are met.
 
    Among  the conditions which would have to  be satisfied for the Exemption to
apply to the acquisition by an ERISA Plan of the Class A-10 Certificates, is the
condition that the  ERISA Plan investing  in the Class  A-10 Certificates be  an
"accredited  investor"  as defined  in  Rule 501(a)(1)  of  Regulation D  of the
Securities and Exchange Commission under the Securities Act.
 
    Before purchasing a  Class A-10 Certificate,  a fiduciary of  an ERISA  Plan
should make its own determination as to the availability of the exemptive relief
provided   in  the  Exemption  or  the  availability  of  any  other  prohibited
transaction exemptions (including PTE 83-1),  and whether the conditions of  any
such  exemption will be applicable to the Class A-10 Certificates. Any fiduciary
of an ERISA Plan considering whether to purchase a Class A-10 Certificate should
also carefully  review with  its own  legal advisors  the applicability  of  the
fiduciary  duty and prohibited  transaction provisions of ERISA  and the Code to
such investment. See "ERISA Considerations" in the Prospectus.
 
                                LEGAL INVESTMENT
 
    The Class A-10  Certificates will constitute  "mortgage related  securities"
for  purposes  of the  Secondary Mortgage  Market Enhancement  Act of  1984 (the
"Enhancement Act") so long as  they are rated in one  of the two highest  rating
categories   by   at  least   one   nationally  recognized   statistical  rating
organization. As such,  the Class  A-10 Certificates are  legal investments  for
certain  entities  to  the  extent provided  in  the  Enhancement  Act. However,
institutions subject to the jurisdiction of the Office of the Comptroller of the
Currency, the Board  of Governors  of the  Federal Reserve  System, the  Federal
Deposit  Insurance Corporation, the  Office of Thrift  Supervision, the National
Credit Union Administration  or state  banking or  insurance authorities  should
review  applicable rules, supervisory policies  and guidelines of these agencies
before purchasing a Class A-10 Certificate,  as such Certificates may be  deemed
to  be unsuitable  investments under  one or more  of these  rules, policies and
guidelines and certain restrictions may apply  to investments in the Class  A-10
Certificates. It should also be noted that certain states recently have enacted,
or  have proposed enacting, legislation limiting  to varying extents the ability
of certain entities (in  particular insurance companies)  to invest in  mortgage
related  securities. Investors should  consult with their  own legal advisors in
determining whether and to  what extent the  Class A-10 Certificates  constitute
legal investments for such investors. See "Legal Investment" in the Prospectus.
 
                                 LEGAL MATTERS
 
    The  validity of  the Class A-10  Certificates and certain  tax matters with
respect thereto will be passed upon  for the Seller by Cadwalader, Wickersham  &
Taft,  New York,  New York. Certain  legal matters  will be passed  upon for the
Underwriter by Brown & Wood, New York, New York.
 
                                USE OF PROCEEDS
 
    The net proceeds to be received from the sale of the Class A-10 Certificates
will be applied by  the Seller to  the purchase from an  affiliate of the  Class
A-10 Certificates.
 
                                    RATINGS
 
    The  Class A-10 Certificates  have been rated  "AAA" by Fitch  and "AAAr" by
S&P. See "Ratings" in the Prospectus Supplement for a further discussion of  the
ratings  of  the  Certificates. S&P  assigns  the  additional rating  of  "r" to
highlight classes of securities that S&P believes may experience high volatility
or high variability in expected returns due to non-credit risks.
 
                                     S1-24
<PAGE>
    The ratings  of  Fitch on  mortgage  pass-through certificates  address  the
likelihood  of the receipt  by certificateholders of  all distributions to which
such certificateholders  are  entitled.  Fitch's  rating  opinions  address  the
structural  and legal  aspects associated  with the  certificates, including the
nature of  the  underlying  mortgage  loans.  Fitch's  ratings  on  pass-through
certificates  do  not represent  any  assessment of  the  likelihood or  rate of
principal prepayments and  consequently any  adverse effect the  timing of  such
prepayments could have on an investor's anticipated yield.
 
    S&P's  ratings on mortgage pass-through  certificates address the likelihood
of receipt by  certificateholders of  timely payments of  interest and  ultimate
return of principal. S&P's ratings take into consideration the credit quality of
the  mortgage pool including any credit  support providers, structural and legal
aspects associated with the  certificates, and the extent  to which the  payment
stream  of the  mortgage pool  is adequate  to make  payment required  under the
certificates. S&P's ratings on  the certificates do  not, however, constitute  a
statement  regarding the frequency  of prepayments on  the mortgage loans. S&P's
rating does not address the possibility  that investors may suffer a lower  than
anticipated  yield as  a result of  prepayments of the  underlying mortgages. In
addition, it should be noted that in some structures a default on a mortgage  is
treated as a prepayment and may have the same effect on yield as a prepayment.
 
    The  ratings of  Fitch and  S&P do  not address  the possibility  that, as a
result of principal  prepayments, Certificateholders  may receive  a lower  than
anticipated yield or the possibility that, as a result of prepayments, investors
in  the  Class  A-10  Certificates  may  fail  to  fully  recoup  their  initial
investment.
 
               INCORPORATION OF CERTAIN INFORMATION BY REFERENCE
 
    There are incorporated herein by  reference all documents and reports  filed
or caused to be filed by the Seller with respect to the Trust Estate pursuant to
Section  13(a), 13(c), 14 or 15(d) of the Exchange Act, prior to the termination
of the offering of the Class A-10 Certificates. The Seller will provide or cause
to be  provided  without  charge to  each  person  to whom  this  Supplement  is
delivered  in connection with the offering of the Class A-10 Certificates a list
identifying all  filings with  respect to  a Trust  Estate pursuant  to  Section
13(a),  13(c), 14 or 15(d) of the  Exchange Act since the Seller's latest fiscal
year covered  by its  annual  report on  Form 10-K  and  a copy  of any  or  all
documents  or  reports incorporated  herein by  reference, in  each case  to the
extent such documents or  reports relate to the  Class A-10 Certificates,  other
than  the  exhibits to  such documents  (unless  such exhibits  are specifically
incorporated by reference in such documents).  Requests to the Seller should  be
directed  to:  The  Prudential  Home  Mortgage  Securities  Company,  Inc., 5325
Spectrum Drive, Frederick, Maryland 21701, telephone number (301) 846-8199.
 
                                     S1-25
<PAGE>
            PROSPECTUS SUPPLEMENT TO PROSPECTUS DATED APRIL 8, 1992
 
                                  $428,718,000
                                 (APPROXIMATE)
          THE PRUDENTIAL HOME MORTGAGE SECURITIES COMPANY, INC. [LOGO]
                                     SELLER
               MORTGAGE PASS-THROUGH CERTIFICATES, SERIES 1992-13
        PRINCIPAL AND INTEREST PAYABLE MONTHLY, COMMENCING IN JUNE 1992
                              -------------------
 
    The  Series 1992-13 Mortgage Pass-Through  Certificates (the "Series 1992-13
Certificates") will consist of  one class of senior  certificates (the "Class  A
Certificates")  and  two  classes  of subordinated  certificates  (the  "Class M
Certificates" and  "Class  B  Certificates,"  respectively,  and  together,  the
"Subordinated  Certificates").  The  rights  of  the  holders  of  the  Class  M
Certificates to receive distributions with respect to the Mortgage Loans will be
subordinated to the rights of  the holders of the  Class A Certificates and  the
rights  of the holders of the Class B Certificates to receive distributions with
respect to the Mortgage Loans will be subordinated to the rights of the  holders
of  both the Class A and Class M Certificates to the extent described herein and
in the Prospectus.
 
    The Class  A  Certificates  will  consist  of  eleven  subclasses  (each,  a
"Subclass")  of Certificates designated as the  Class A-1, Class A-2, Class A-3,
Class A-4, Class A-5, Class A-6, Class A-7, Class A-8, Class A-9, Class A-10 and
Class A-R Certificates. The  Class A-1, Class A-2,  Class A-3, Class A-4,  Class
A-5,  Class A-6 and Class A-7 Certificates are planned amortization certificates
and are referred to herein collectively as the "PAC Certificates". The Class A-7
Certificates will accrete interest as described herein and are also referred  to
herein  as the "Accrual  Certificates". The Class  A-8, Class A-9  and Class A-R
Certificates will receive payments of principal in excess of certain  prepayment
levels   that  would  otherwise  be  distributed  to  the  holders  of  the  PAC
Certificates  and  are  referred  to  herein  collectively  as  the   "Companion
Certificates". The Class M Certificates will not be divided into subclasses. The
Class  B Certificates will consist of four subclasses of Certificates designated
as the Class B-1, Class B-2, Class  B-3 and Class B-4 Certificates. The Class  A
Certificates   (other  than  the  Class  A-10  Certificates)  and  the  Class  M
Certificates are the only Certificates being offered hereby and are referred  to
herein collectively as the "Offered Certificates".
 
    The  Series 1992-13 Certificates  will evidence in  the aggregate the entire
beneficial ownership interest in a trust fund (the "Trust Estate") consisting of
a pool of fixed interest rate, conventional, monthly pay, fully amortizing, one-
to four-family, residential first mortgage loans having original terms to stated
maturity of approximately 15 years (the "Mortgage Loans"), together with certain
related property, sold by The Prudential Home Mortgage Securities Company,  Inc.
(the  "Seller") and serviced  by The Prudential Home  Mortgage Company, Inc. (in
its capacity  as  servicer,  the  "Servicer," otherwise  "PHMC").  The  Class  A
Certificates  will  initially evidence  in the  aggregate an  approximate 94.50%
undivided interest in the principal balance  of the Mortgage Loans. The Class  M
 
                                                        (CONTINUED ON NEXT PAGE)
                             ---------------------
 
    THESE  SECURITIES  DO  NOT  REPRESENT INTERESTS  IN  OR  OBLIGATIONS  OF THE
PRUDENTIAL HOME  MORTGAGE SECURITIES  COMPANY, INC.  OR ANY  AFFILIATE  THEREOF.
NEITHER  THESE SECURITIES NOR  THE UNDERLYING MORTGAGE LOANS  WILL BE INSURED OR
GUARANTEED BY ANY GOVERNMENTAL AGENCY OR INSTRUMENTALITY.
                              -------------------
 
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.
                              -------------------
 
                           INITIAL SUBCLASS OR
SUBCLASS OR CLASS            CLASS PRINCIPAL
DESIGNATION                    BALANCE (1)        PASS-THROUGH RATE
Class A-1................  $66,185,000                      7.50%
Class A-2................  $21,997,000                      7.50%
Class A-3................  $59,715,000                      7.50%
Class A-4................  $17,984,000                      7.50%
Class A-5................  $66,417,000                      7.50%
Class A-6................  $44,058,000                      7.50%
Class A-7................  $14,132,000                      7.50%
Class A-8................  $88,843,000                      7.50%
Class A-9................  $41,592,000                      7.50%
Class A-R................  $1,000                           7.50%(2)
Class M..................  $7,794,000                       7.50%
 
(1) Approximate. The initial Subclass or Class Principal Balances are subject to
    adjustment as described herein.
 
(2) On the Class A-R Notional Amount.
 
    The Offered  Certificates will  be  purchased by  the Underwriter  from  the
Seller and will be offered by the Underwriter from time to time to the public in
negotiated  transactions or otherwise at varying  prices to be determined at the
time of sale. Proceeds to the Seller  from the sale of the Offered  Certificates
will  be 98.609375%  of the initial  aggregate principal balance  of the Offered
Certificates, plus  accrued interest  thereon  and on  an  amount equal  to  the
aggregate  principal balance of the Class A-10 Certificates at the rate of 7.50%
per annum from May 1, 1992 to (but not including) May 8, 1992, before  deducting
expenses payable by the Seller estimated to be $425,000. The price to be paid to
the   Seller  has  not  been  allocated  among  the  Offered  Certificates.  See
"Underwriting" herein.
 
    The Offered Certificates  are offered  by the  Underwriter when,  as and  if
issued  and subject to delivery by the Seller and acceptance by the Underwriter,
to prior  sale and  to withdrawal,  cancellation or  modification of  the  offer
without  notice. It is expected that  the Offered Certificates will be available
for delivery through the facilities of  The Depository Trust Company, or in  the
case  of the Class  A-R and Class  M Certificates, at  the offices of Prudential
Securities Incorporated, 100 Gold Street, New  York, New York, in each case,  on
or about May 8, 1992.
 
                       PRUDENTIAL SECURITIES INCORPORATED
 
April 14, 1992
<PAGE>
(CONTINUED FROM PREVIOUS PAGE)
 
Certificates  will  initially evidence  in  the aggregate  an  approximate 1.75%
undivided interest in the principal balance of the Mortgage Loans. The remaining
undivided interest  in the  principal  balance of  the  Mortgage Loans  will  be
evidenced by the Class B Certificates.
 
    Distributions  in respect of interest  will be made on  the 25th day of each
month or  the next  succeeding business  day, commencing  in June  1992, to  the
holders  of Offered  Certificates, other than  the Accrual  Certificates, to the
extent described herein. Distributions in respect of interest to the holders  of
the Accrual Certificates will not commence until the Accretion Termination Date.
Prior to such time, interest otherwise available for distribution to the Accrual
Certificates  will be added to the principal  balance thereof. The rights of the
holders of the Class M Certificates to receive distributions of interest will be
subordinated to the rights of the holders of the Class A Certificates to receive
distributions of  interest and  principal  as described  herein. The  amount  of
interest  accrued  on any  Subclass  or Class  of  Offered Certificates  will be
reduced by the amount of (i) any Non-Supported Interest Shortfall and (ii) other
losses  allocable  to  such  Subclass   or  Class  as  described  herein   under
"Description  of the Certificates--Interest." Distributions  in reduction of the
principal balance  of the  Class A  Certificates will  be made  monthly on  each
Distribution  Date  in  an  aggregate  amount equal  to  the  Class  A Principal
Distribution Amount. Distributions in reduction of the principal balance of  the
Class  M  Certificates will  be made  monthly  on each  Distribution Date  in an
aggregate amount equal to  the Class M Principal  Distribution Amount after  the
Class A Certificates have received the Class A Distribution Amount and the Class
M  Certificates have received their amount of  interest due with respect to such
Distribution Date. Distributions in  reduction of the  principal balance of  the
Class  A  Certificates on  any  Distribution Date  will  be allocated  among the
Subclasses of  Class  A  Certificates  in  the  manner  described  herein  under
"Description    of   the   Certificates--Principal   (Including   Prepayments)."
Distributions to each Subclass or Class of Offered Certificates will be made pro
rata among Certificateholders of such Subclass or Class.
 
    THE YIELD  TO MATURITY  OF THE  OFFERED CERTIFICATES  WILL BE  SENSITIVE  IN
VARYING  DEGREES  TO  THE  RATE  AND  TIMING  OF  PRINCIPAL  PAYMENTS (INCLUDING
PREPAYMENTS) ON THE  MORTGAGE LOANS, WHICH  MAY BE PREPAID  AT ANY TIME  WITHOUT
PENALTY.  INVESTORS IN THE  OFFERED CERTIFICATES SHOULD  CONSIDER THE ASSOCIATED
RISKS, INCLUDING, IN THE CASE OF  OFFERED CERTIFICATES PURCHASED AT A  DISCOUNT,
THE RISK THAT A SLOWER THAN ANTICIPATED RATE OF PAYMENTS IN RESPECT OF PRINCIPAL
(INCLUDING  PREPAYMENTS) ON THE  MORTGAGE LOANS COULD RESULT  IN AN ACTUAL YIELD
THAT IS  LOWER  THAN  ANTICIPATED  AND, IN  THE  CASE  OF  OFFERED  CERTIFICATES
PURCHASED  AT  A PREMIUM  THAT A  FASTER  THAN ANTICIPATED  RATE OF  PAYMENTS IN
RESPECT OF PRINCIPAL (INCLUDING PREPAYMENTS) ON THE MORTGAGE LOANS COULD  RESULT
IN AN ACTUAL YIELD THAT IS LOWER THAN ANTICIPATED. THE WEIGHTED AVERAGE LIVES OF
THE  COMPANION  CERTIFICATES  WILL  BE PARTICULARLY  SENSITIVE  TO  THE  RATE OF
PREPAYMENTS ON THE  MORTGAGE LOANS  AT CERTAIN  CONSTANT RATES  OF SPA,  BECAUSE
PAYMENTS OF PRINCIPAL ALLOCATED TO THE CLASS A CERTIFICATES IN EXCESS OF CERTAIN
PREPAYMENT  LEVELS WILL  BE PAID  TO THE  HOLDERS OF  THE COMPANION CERTIFICATES
RATHER THAN TO  THE HOLDERS  OF THE PAC  CERTIFICATES. SEE  "DESCRIPTION OF  THE
CERTIFICATES--INTEREST"  AND  "--PRINCIPAL (INCLUDING  PREPAYMENTS)"  HEREIN AND
"PREPAYMENT AND YIELD CONSIDERATIONS" HEREIN AND IN THE PROSPECTUS.
 
    THE YIELD TO MATURITY OF THE CLASS M CERTIFICATES WILL BE MORE SENSITIVE  TO
LOSSES  DUE TO LIQUIDATIONS OF THE MORTGAGE  LOANS (AND THE TIMING THEREOF) THAN
THE CLASS A CERTIFICATES, TO THE EXTENT  THAT THE CLASS B PRINCIPAL BALANCE  HAS
BEEN REDUCED TO ZERO. SEE "DESCRIPTION OF THE CERTIFICATES--PRINCIPAL (INCLUDING
PREPAYMENTS)" AND "--SUBORDINATION OF CLASS M AND CLASS B CERTIFICATES" HEREIN.
 
    The  Offered Certificates other than the  Class A-R and Class M Certificates
(the "Book-Entry  Certificates") will  be issued  only in  book-entry form,  and
purchasers  thereof  will not  be  entitled to  receive  definitive certificates
except  in  the   limited  circumstances  set   forth  herein.  The   Book-Entry
Certificates  will be registered  in the name of  Cede & Co.,  as nominee of The
Depository Trust Company, which will  be the "holder" or "Certificateholder"  of
such  Certificates,  as such  terms  are used  herein.  See "Description  of the
Certificates" herein.
 
    There is  currently no  secondary market  for the  Offered Certificates  and
there  can be no assurance  that a secondary market will  develop or, if it does
develop, that it will provide Certificateholders with liquidity of investment at
any particular time or for the life of the Offered Certificates. The Underwriter
intends to  act  as a  market  maker in  the  Offered Certificates,  subject  to
applicable  provisions of federal and state securities laws and other regulatory
requirements, but is under no obligation to do so. THE CLASS M CERTIFICATES  MAY
NOT  BE PURCHASED BY OR TRANSFERRED TO AN ERISA PLAN EXCEPT UPON THE DELIVERY OF
AN OPINION OF COUNSEL AS PROVIDED HEREIN. IN ADDITION, THE CLASS A-R CERTIFICATE
MAY NOT BE PURCHASED BY OR  TRANSFERRED TO (I) A "DISQUALIFIED ORGANIZATION"  OR
"BOOK-ENTRY  NOMINEE," (II) EXCEPT UNDER  CERTAIN LIMITED CIRCUMSTANCES, PERSONS
WHO ARE NOT "U.S. PERSONS," (III) AN ERISA PLAN OR (IV) ANY PERSON OR ENTITY WHO
THE TRANSFEROR  HAS  REASON TO  BELIEVE  INTENDS  TO IMPEDE  THE  ASSESSMENT  OR
COLLECTION OF ANY FEDERAL, STATE OR LOCAL TAXES LEGALLY REQUIRED TO BE PAID WITH
RESPECT   THERETO.   See  "ERISA   Considerations"   and  "Description   of  the
Certificates--  Restrictions  on  Transfer  of   the  Class  A-R  and  Class   M
Certificates"  herein,  and  "Certain Federal  Income  Tax Consequences--Federal
Income  Tax   Consequences   for  REMIC   Certificates--Taxation   of   Residual
Certificates--Tax-Related  Restrictions on Transfer of Residual Certificates" in
the Prospectus.
 
    An election will be made to treat the Trust Estate as a real estate mortgage
investment conduit (the "REMIC") for  federal income tax purposes. As  described
more  fully herein and in  the Prospectus, the Class  A-1, Class A-2, Class A-3,
Class A-4, Class A-5, Class A-6, Class A-7, Class A-8, Class A-9, Class A-10 and
Class M  Certificates  and  each  subclass of  the  Class  B  Certificates  will
constitute  "regular interests" in the REMIC  and the Class A-R Certificate will
constitute the  "residual  interest" in  the  REMIC. PROSPECTIVE  INVESTORS  ARE
CAUTIONED  THAT THE CLASS A-R CERTIFICATEHOLDER'S  REMIC TAXABLE INCOME AND SUCH
HOLDER'S TAX LIABILITY  THEREON WILL  EXCEED CASH DISTRIBUTIONS  TO SUCH  HOLDER
DURING  CERTAIN PERIODS, IN WHICH EVENT  THE HOLDER THEREOF MUST HAVE SUFFICIENT
ALTERNATIVE  SOURCES  OF  FUNDS  TO   PAY  SUCH  TAX  LIABILITY.  See   "Summary
Information--Federal  Income Tax Status" and "Federal Income Tax Considerations"
herein  and  "Certain  Federal  Income  Tax  Consequences--Federal  Income   Tax
Consequences for REMIC Certificates" in the Prospectus.
 
    The  Class A Certificates (other than the Class A-10 Certificates) represent
ten Subclasses of a Class  and the Class M Certificates  represent a Class of  a
separate  Series of  Certificates being  offered by  the Seller  pursuant to the
Prospectus dated  April 8,  1992 accompanying  this Prospectus  Supplement.  Any
prospective  investor  should not  purchase  any Offered  Certificates described
herein unless  it  shall  have  received  the  Prospectus  and  this  Prospectus
Supplement.  The  Prospectus  shall  not  be  considered  complete  without this
Prospectus Supplement. The Prospectus  contains important information  regarding
this offering which is not contained herein, and prospective investors are urged
to read, in full, the Prospectus and this Prospectus Supplement.
                             ---------------------
 
    UNTIL  AUGUST  3, 1992  ALL DEALERS  EFFECTING  TRANSACTIONS IN  THE OFFERED
CERTIFICATES, 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.
 
                                      S-2
<PAGE>
                               TABLE OF CONTENTS
 
                             PROSPECTUS SUPPLEMENT
 
<TABLE>
<CAPTION>
                                                                             PAGE
                                                                             ----
<S>                                                                          <C>
Summary Information........................................................  S-4
Description of the Certificates............................................  S-18
  General..................................................................  S-18
  Book-Entry Registration..................................................  S-18
  Definitive Certificates..................................................  S-19
  Distributions............................................................  S-19
  Interest.................................................................  S-22
  Principal (Including Prepayments)........................................  S-25
    CALCULATION OF AMOUNT TO BE DISTRIBUTED TO THE CLASS A CERTIFICATES....  S-26
    CALCULATION OF AMOUNT TO BE DISTRIBUTED TO THE CLASS M CERTIFICATES....  S-28
    ALLOCATION OF AMOUNT TO BE DISTRIBUTED TO THE CLASS A AND CLASS M
     CERTIFICATES..........................................................  S-30
    PRINCIPAL PAYMENT CHARACTERISTICS OF THE PAC CERTIFICATES AND THE
     COMPANION CERTIFICATES................................................  S-36
  Additional Rights of the Class A-R Certificateholder.....................  S-37
  Periodic Advances........................................................  S-37
  Restrictions on Transfer of the Class A-R and Class M Certificates.......  S-38
  Reports..................................................................  S-39
  Subordination of Class M and Class B Certificates........................  S-39
    ALLOCATION OF LOSSES...................................................  S-40
Description of the Mortgage Loans..........................................  S-43
  Mandatory Repurchase or Substitution of Mortgage Loans...................  S-49
  Optional Repurchase of Defaulted Mortgage Loans..........................  S-49
Origination, Delinquency and Foreclosure Experience........................  S-50
  Loan Origination.........................................................  S-50
  Delinquency and Foreclosure Experience...................................  S-50
Prepayment and Yield Considerations........................................  S-54
Pooling and Servicing Agreement............................................  S-60
  General..................................................................  S-60
  Voting...................................................................  S-60
  Trustee..................................................................  S-61
  Servicing Compensation and Payment of Expenses...........................  S-61
  Optional Termination.....................................................  S-61
Federal Income Tax Considerations..........................................  S-62
  Regular Certificates.....................................................  S-62
  Residual Certificate.....................................................  S-62
ERISA Considerations.......................................................  S-63
Legal Investment...........................................................  S-64
Secondary Market...........................................................  S-65
Underwriting...............................................................  S-65
Legal Matters..............................................................  S-66
Use of Proceeds............................................................  S-66
Ratings....................................................................  S-66
Index of Significant Prospectus Supplement Definitions.....................  S-67
</TABLE>
 
                                      S-3
<PAGE>
                              SUMMARY INFORMATION
 
    THE  FOLLOWING IS  QUALIFIED IN  ITS ENTIRETY  BY REFERENCE  TO THE DETAILED
INFORMATION APPEARING  ELSEWHERE  IN  THIS  PROSPECTUS  SUPPLEMENT  AND  IN  THE
ACCOMPANYING  PROSPECTUS  (THE  "PROSPECTUS"). CAPITALIZED  TERMS  USED  IN THIS
PROSPECTUS SUPPLEMENT  AND  NOT  OTHERWISE  DEFINED  HEREIN  HAVE  THE  MEANINGS
ASSIGNED IN THE PROSPECTUS.
 
<TABLE>
<S>                     <C>
Title of Securities...  Mortgage  Pass-Through Certificates, Series 1992-13 (the
                        "Series 1992-13 Certificates" or the "Certificates").
Seller................  The Prudential  Home Mortgage  Securities Company,  Inc.
                        (the "Seller"). See "The Seller" in the Prospectus.
Servicer..............  The  Prudential  Home  Mortgage  Company,  Inc.  (in its
                        capacity  as   servicer,  the   "Servicer;"   otherwise,
                        "PHMC").  See  "Servicing  of  the  Mortgage  Loans" and
                        "PHMC--General" in the Prospectus.
Trustee...............  First Trust  National  Association, a  national  banking
                        association  (the "Trustee"). See "Pooling and Servicing
                        Agreement--Trustee" in this Prospectus Supplement.
Rating of
  Certificates........  It is  a  condition  to  the issuance  of  the  Class  A
                        Certificates  offered by this  Prospectus Supplement and
                        Prospectus that  they shall  have  been rated  "AAA"  by
                        Standard   &  Poor's   Corporation  ("S&P")   and  Fitch
                        Investors Service, Inc. ("Fitch"). It is a condition  to
                        the issuance of the Class M Certificates that they shall
                        have  been rated "AA"  by S&P and  Fitch. The ratings by
                        S&P and Fitch  are not recommendations  to buy, sell  or
                        hold such Certificates and may be subject to revision or
                        withdrawal  at any time by  the assigning rating agency.
                        The ratings do  not address the  possibility that, as  a
                        result   of  principal  prepayments,   holders  of  such
                        Certificates may receive a lower than anticipated yield.
                        See   "--Effects    of   Prepayments    on    Investment
                        Expectations"  below  and "Ratings"  in  this Prospectus
                        Supplement.
Description of
  Certificates........  The Series 1992-13 Certificates will consist of Class  A
                        Certificates,   Class   M  Certificates   and   Class  B
                        Certificates. The Class A Certificates represent a  type
                        of  interest referred  to in  the Prospectus  as "Senior
                        Certificates;" and the Class M and Class B Certificates,
                        a  type  of  interest   referred  to  as   "Subordinated
                        Certificates."  As these designations suggest, the Class
                        A Certificates  are  entitled  to  a  certain  priority,
                        relative  to the  Class M  and Class  B Certificates, in
                        right of distributions on the mortgage loans  underlying
                        the  Series 1992-13 Certificates (the "Mortgage Loans").
                        As between  the Class  M Certificates  and the  Class  B
                        Certificates, the Class M Certificates are entitled to a
                        certain  priority  in  right  of  distributions  on  the
                        Mortgage Loans.  See "--Distributions  of Principal  and
                        Interest" below.
                        Initially, the Class A Certificates will evidence in the
                        aggregate    an   approximate    94.50%   (approximately
                        $420,925,000)  undivided   interest   in   the   initial
                        aggregate  principal balance of  the Mortgage Loans; the
                        Class M Certificates will  evidence in the aggregate  an
                        approximate  1.75% (approximately  $7,794,000) undivided
                        interest in the initial  aggregate principal balance  of
                        the  Mortgage Loans;  and the Class  B Certificates will
                        evidence  in   the   aggregate  an   approximate   3.75%
                        (approximately  $16,704,441)  undivided interest  in the
                        initial aggregate  principal  balance  of  the  Mortgage
                        Loans. The relative interests in the
</TABLE>
 
                                      S-4
<PAGE>
 
<TABLE>
<S>                     <C>
                        aggregate  outstanding principal balance of the Mortgage
                        Loans represented by the  Class A, Class  M and Class  B
                        Certificates  are subject to change over time because of
                        the disproportionate allocation  of certain  unscheduled
                        principal  payments to the Class  A Certificates and the
                        allocation of  certain  losses  first  to  the  Class  B
                        Certificates,  until  the  aggregate  principal  balance
                        thereof has been reduced to zero, and then to the  Class
                        M  Certificates, until  the aggregate  principal balance
                        thereof  has  been  reduced   to  zero,  prior  to   the
                        allocation  of such losses to  the Class A Certificates,
                        as discussed  in "--Distributions  of Principal  and  of
                        Interest" and "--Credit Enhancement" below.
                        The   Class  A  Certificates   will  consist  of  eleven
                        subclasses, designated  as  the Class  A-1,  Class  A-2,
                        Class  A-3, Class A-4, Class  A-5, Class A-6, Class A-7,
                        Class  A-8,  Class  A-9,   Class  A-10  and  Class   A-R
                        Certificates. The Class A-1, Class A-2, Class A-3, Class
                        A-4, Class A-5, Class A-6 and Class A-7 Certificates are
                        planned amortization class Certificates and are referred
                        to  herein collectively  as the  "PAC Certificates." The
                        Class A-7 Certificates are also referred to as  "Accrual
                        Certificates"  because the interest  due holders of such
                        subclass will not be paid currently on any  Distribution
                        Date  but,  instead,  will  be  added  to  the principal
                        balance of such subclass until the Accretion Termination
                        Date, which is  described on  page S-9.  The Class  A-8,
                        Class  A-9 and  Class A-R  Certificates are  referred to
                        herein  collectively  as  the  "Companion  Certificates"
                        because  payments of principal allocated  to the Class A
                        Certificates in excess of certain prepayment levels will
                        be paid  to the  holders of  the Companion  Certificates
                        rather  than to the holders of the PAC Certificates. The
                        Class  M   Certificates  will   not  be   divided   into
                        subclasses.  The  Class B  Certificates will  consist of
                        four subclasses, designated as the Class B-1, Class B-2,
                        Class B-3 and Class B-4 Certificates.
                        Only the Class A Certificates (other than the Class A-10
                        Certificates) and Class M Certificates are being offered
                        for  sale  by   this  Prospectus   Supplement  and   the
                        Prospectus  and  are  referred  to  in  this  Prospectus
                        Supplement as the  "Offered Certificates". Reference  to
                        the  "Subordinated Certificates"  is to the  Class M and
                        Class B Certificates.  The Class  A-10 Certificates  and
                        one  or more of  the subclasses of  Class B Certificates
                        may be retained or sold by the Seller.
                        The Offered Certificates have the approximate  aggregate
                        initial  principal balances  set forth  on the  cover of
                        this Prospectus Supplement.  Any difference between  the
                        aggregate  principal balance of the  Class A and Class M
                        Certificates as of  the date of  issuance of the  Series
                        1992-13   Certificates   and  the   approximate  initial
                        aggregate principal balance of the  Class A and Class  M
                        Certificates  as of the date  of this Prospectus Supple-
                        ment will not, with respect to the Class A  Certificates
                        (other  than the Class A-10  Certificates), exceed 5% of
                        the initial aggregate principal balance of such Class  A
                        Certificates  stated  on  the cover  of  this Prospectus
                        Supplement  and,   with   respect   to   the   Class   M
                        Certificates,  will  depend on  the  final subordination
</TABLE>
 
                                      S-5
<PAGE>
 
<TABLE>
<S>                     <C>
                        levels  for   the  Series   1992-13  Certificates.   Any
                        difference allocated to the Class A Certificates will be
                        allocated  among the subclasses  of Class A Certificates
                        other than the Class A-10 and Class A-R Certificates.
Forms of Certificates;
  Denominations.......  BOOK-ENTRY FORM.   The Offered  Certificates other  than
                        the Class A-R and Class M Certificates will be issued in
                        book-entry   form,   through  the   facilities   of  The
                        Depository Trust Company ("DTC"). These Certificates are
                        referred to, collectively, in this Prospectus Supplement
                        as the  "Book-Entry  Certificates."  An  investor  in  a
                        subclass  of Book-Entry Certificates  will not receive a
                        physical certificate representing its ownership interest
                        in   such   Book-Entry   Certificates,   except    under
                        extraordinary  circumstances,  which  are  discussed  in
                        "Description of the Certificates--Definitive
                        Certificates" in  this Prospectus  Supplement.  Instead,
                        DTC  will effect payments and  transfers by means of its
                        electronic  recordkeeping   services,   acting   through
                        certain  participating organizations. This may result in
                        certain  delays  in  receipt  of  distributions  by   an
                        investor  and  may  restrict  an  investor's  ability to
                        pledge its securities.  The rights of  investors in  the
                        Book-Entry  Certificates may generally only be exercised
                        through DTC  and  its participating  organizations.  See
                        "Description of the Certificates--Book-Entry
                        Registration" in this Prospectus Supplement.
                        The  Book-Entry Certificates  will be  issued in minimum
                        denominations of $100,000 initial principal balance. Any
                        amounts in  excess  of  $100,000  will  be  in  integral
                        multiples of $1,000 initial principal balance.
                        CERTIFICATED   FORM.     The  Class  A-R   and  Class  M
                        Certificates  will  be  offered  in  fully   registered,
                        certificated  form. Accordingly, an investor in any such
                        subclass or class will be issued a physical  certificate
                        representing its ownership interest.
                        The  Class  M  Certificates will  be  issued  in minimum
                        denominations of $100,000 initial principal balance. Any
                        amounts in  excess  of  $100,000  will  be  in  integral
                        multiples of $1,000 initial principal balance. The Class
                        A-R  Certificate will be issued  in a single certificate
                        with a denomination of $1,000 initial principal balance.
                        See "Description of  the Certificates--General" in  this
                        Prospectus Supplement.
Mortgage Loans........  MORTGAGE  LOAN DATA.  The  Mortgage Loans, which are the
                        source of distributions to holders of the Series 1992-13
                        Certificates, are expected  to consist of  conventional,
                        fixed interest rate, monthly pay, fully amortizing, one-
                        to four-family, residential first mortgage loans, having
                        original  terms to  stated maturity  of approximately 15
                        years. The  Mortgage  Loans  are expected  to  have  the
                        further  specifications set forth in the table appearing
                        on the immediately following page and under the  heading
                        "Description  of the Mortgage  Loans" in this Prospectus
                        Supplement.
                        Some of the Mortgage Loans  are expected to be  mortgage
                        loans  originated in  connection with  the relocation of
                        employees of various  corporate employers  participating
                        in PHMC's relocation program and of employees of various
                        non-participant employers.
</TABLE>
 
                                      S-6
<PAGE>
 
<TABLE>
<S>                             <C>
- --------------------------------------------------------------------------------
SELECTED MORTGAGE LOAN DATA
(AS   OF  THE   CUT-OFF  DATE)
 
Cut-Off Date:                   May 1, 1992
Number of Mortgage Loans:       1,711
Aggregate   Unpaid   Principal
  Balance (1):                  $445,423,441
 
Range   of   Unpaid  Principal  $12,112 to $994,586
  Balances (1):
Average Unpaid Principal
  Balance (1):                  $260,329
 
Range of Interest Rates:        7.750% to 10.875%
Weighted   Average    Interest  8.458%
  Rate (1):
 
Range  of  Remaining  Terms to
  Stated Maturity:              86 months to 180 months
Weighted   Average   Remaining
  Term to Stated Maturity (1):  178 months
 
Range of Original
  Loan-to-Value Ratios:         9.84% to 90.00%
Weighted    Average   Original
  Loan-to-Value Ratio (1):      65%
 
Aggregate   Unpaid   Principal
  Balance of Relocation
  Mortgage Loans(1):            $9,876,475
Relocation Mortgage Loans as a
  Percentage    of   Aggregate
  Unpaid Principal Balance  of
  Mortgage Loans(1):            2.22%
 
(1) approximate
- --------------------------------------------------------------------------------
</TABLE>
 
<TABLE>
<S>                     <C>
                        CHANGES  TO POOL.  A number of Mortgage Loans may be re-
                        moved from the pool, or  a substitution may be made  for
                        certain  Mortgage Loans,  in advance of  the issuance of
                        the Series 1992-13  Certificates (which  is expected  to
                        occur  on  or about  May 8,  1992).  This may  result in
                        changes in certain of the pool characteristics set forth
                        in the  table above  and  elsewhere in  this  Prospectus
                        Supplement.  See "Description of  the Mortgage Loans" in
                        this Prospectus Supplement.
                        Subsequent  to  the  issuance  of  the  Series   1992-13
                        Certificates, certain Mortgage Loans may be removed from
                        the   pool   through   repurchase   or,   under  certain
                        circumstances,  substitution  by  the  Seller,  if   the
                        Mortgage   Loans  are   discovered  to   have  defective
                        documentation or if they otherwise do not conform to the
                        standards established  by the  Seller's  representations
                        and   warranties  concerning  the  Mortgage  Loans.  See
                        "Description of the Mortgage Loans--Mandatory Repurchase
                        or Substitution of  Mortgage Loans"  in this  Prospectus
                        Supplement.  The  Seller may  also  repurchase defaulted
                        Mortgage  Loans.  See   "Description  of  the   Mortgage
                        Loans--Optional  Repurchase of Defaulted Mortgage Loans"
                        in this Prospectus Supplement.
                        The Servicer is entitled, subject to certain  conditions
                        relating  to  the then-remaining  size  of the  pool, to
                        purchase all outstanding Mortgage Loans in the pool  and
                        thereby effect early retirement
</TABLE>
 
                                      S-7
<PAGE>
 
<TABLE>
<S>                     <C>
                        of  the  Series 1992-13  Certificates. See  "Pooling and
                        Servicing  Agreement--Optional   Termination"  in   this
                        Prospectus Supplement.
Distributions of
  Principal and
  Interest............  DISTRIBUTIONS  IN GENERAL.  Distributions on  the Series
                        1992-13 Certificates will  be made  on the  25th day  of
                        each month or, if such day is not a business day, on the
                        succeeding  business day (each such  date is referred to
                        in this Prospectus Supplement as a "Distribution Date"),
                        commencing in June  1992, to  holders of  record at  the
                        close  of  business  on  the last  business  day  of the
                        preceding  month.  In   the  case   of  the   Book-Entry
                        Certificates, the holder of record will be DTC.
                        On  any  Distribution  Date,  holders  of  the  Class  A
                        Certificates will be entitled to receive all amounts due
                        them before any distributions are made to holders of the
                        Class M and  Class B Certificates  on that  Distribution
                        Date.  The amount that is available to be distributed on
                        any Distribution  Date will  be allocated  first to  pay
                        interest  due holders  of the  Class A  Certificates and
                        then, if the amount  available for distribution  exceeds
                        the  amount  of  interest  due holders  of  the  Class A
                        Certificates,  to  reduce   the  outstanding   principal
                        balance  of  the  Class  A  Certificates.  Prior  to the
                        Accretion Termination Date, interest accrued on the  Ac-
                        crual  Certificates will be distributable on the Class A
                        Certificates as a reduction of principal. The likelihood
                        that a holder of  a particular subclass  of the Class  A
                        Certificates will receive principal distributions on any
                        Distribution  Date will depend on  the priority in which
                        such subclass is entitled to principal distributions, as
                        set  forth  under  the   heading  "Description  of   the
                        Certificates--Principal (Including
                        Prepayments)--Allocation  of Amount to be Distributed to
                        the  Class  A  and   Class  M  Certificates,"  in   this
                        Prospectus Supplement.
                        After  all amounts due  on the Class  A Certificates for
                        any  Distribution  Date  have  been  paid,  the   amount
                        remaining  will be  allocated first to  pay interest due
                        holders of the Class M Certificates, next to reduce  the
                        outstanding   principal   balance   of   the   Class   M
                        Certificates  and  finally  to  make  distributions   of
                        interest  and then principal  due to the  holders of the
                        Class  B   Certificates.   The  amount   available   for
                        distribution  on  any Distribution  Date is  primarily a
                        function of  the amount  remitted by  mortgagors of  the
                        Mortgage   Loans   in   payment   of   their   scheduled
                        installments of principal and  interest, as well as  the
                        amount of prepayments by the mortgagors and liquidations
                        of defaulted Mortgage Loans.
                        If  any  mortgagor  is  delinquent  in  the  payment  of
                        principal and interest on a Mortgage Loan in any  month,
                        the  Servicer will advance such payment, if the Servicer
                        determines  that   the   delinquent   amount   will   be
                        recoverable  by  it from  liquidation proceeds  or other
                        recoveries   on   the   related   Mortgage   Loan.   See
                        "Description of the Certificates--Periodic Advances."
                        INTEREST  DISTRIBUTIONS. The amount of interest to which
                        holders  of   each   subclass  or   class   of   Offered
                        Certificates (other than the Class A-R Certificate) will
                        be  entitled  each month  (and,  prior to  the Accretion
                        Termination Date, the amount of interest to be added  to
                        the  principal balance  of the  Accrual Certificates) is
                        calculated based on the outstanding principal balance of
                        that
</TABLE>
 
                                      S-8
<PAGE>
 
<TABLE>
<S>                     <C>
                        subclass or class, as of the related Distribution  Date.
                        Interest will accrue each month on each such subclass or
                        class  according to the following formula: 1/12th of the
                        pass-through rate for such subclass or class  multiplied
                        by the outstanding principal balance of such subclass or
                        class   as  of   the  related   Distribution  Date.  The
                        pass-through rate for each such subclass or class is the
                        percentage set  forth on  the cover  of this  Prospectus
                        Supplement.
                        The  amount of interest to which the holder of the Class
                        A-R Certificate  is entitled  each month  is  calculated
                        based  on a "notional amount,"  which is an amount other
                        than the actual  outstanding principal  balance of  such
                        subclass.  The method of determining the notional amount
                        of  the  Class  A-R   Certificate  is  described   under
                        "Description  of  the  Certificates--Interest"  in  this
                        Prospectus Supplement. Interest will accrue on the Class
                        A-R Certificate each  month in  an amount  equal to  the
                        product  of (i)  1/12th of  7.50% and  (ii) the notional
                        amount of the Class A-R Certificate.
                        Holders of each subclass of Offered Certificates,  other
                        than  the  Accrual  Certificates,  will  be  entitled to
                        receive distributions of  interest on each  Distribution
                        Date.  Holders of  the Accrual Certificates  will not be
                        entitled to receive distributions of interest until  the
                        "Accretion  Termination Date,"  which is  defined as the
                        earlier of  (i)  the  Distribution  Date  on  which  the
                        principal balance of the Class A-6 Certificates has been
                        reduced to zero and (ii) the date on which the principal
                        balance   of  the  Subordinated  Certificates  has  been
                        reduced   to    zero.    See   "Description    of    the
                        Certificates--Interest"  in this  Prospectus Supplement.
                        Before that time,  the amount of  interest to which  the
                        holders  of the  Accrual Certificates  are entitled will
                        not be distributed  as interest  to the  holders of  the
                        Accrual  Certificates but will be added to the principal
                        balance of  the  Accrual  Certificates.  The  amount  of
                        interest   which  has  accrued   but  is  not  currently
                        distributable  on  the  Accrual  Certificates  will   be
                        distributed  to the Class A  Certificates as a reduction
                        of principal. See "Description of the
                        Certificates--Principal (Including Prepayments)" in this
                        Prospectus Supplement.
                        When  mortgagors  prepay   principal,  a  full   month's
                        interest  for  the month  of  payment may  not  be paid,
                        resulting in  interest shortfalls.  Any such  shortfalls
                        that  result from the timing of principal prepayments IN
                        FULL will  be paid  from aggregate  servicing fees  that
                        would  otherwise  be  payable  to  the  Servicer  on any
                        Distribution Date, but only  to the extent of  servicing
                        fees payable with respect to that Distribution Date. Any
                        such  shortfalls that result from  the timing of PARTIAL
                        principal prepayments will reduce the amount of interest
                        required to  be distributed  to  holders of  the  Series
                        1992-13   Certificates.  Shortfalls  in  collections  of
                        interest resulting from  principal prepayments in  full,
                        to  the extent they exceed the aggregate servicing fees,
                        and shortfalls resulting  from partial prepayments  will
                        be  allocated pro rata, based on interest accrued, among
                        the classes of the Series 1992-13 Certificates.
                        In addition,  the  amount  of interest  required  to  be
                        distributed   to   holders   of   the   Series   1992-13
                        Certificates will be reduced by a
</TABLE>
 
                                      S-9
<PAGE>
 
<TABLE>
<S>                     <C>
                        portion of certain special  hazard losses, fraud  losses
                        and  bankruptcy  losses  attributable  to  interest. See
                        "Credit Enhancement--Extent of Loss Coverage" below  and
                        "Description  of  the  Certificates--Interest"  in  this
                        Prospectus Supplement.
                        To the extent that the amount available for distribution
                        on any  Distribution  Date  is  insufficient  to  permit
                        distribution   of  the  applicable   amount  of  accrued
                        interest on  the  Class  A  Certificates  (which  amount
                        includes  any  interest  to be  added  to  the principal
                        balance of  the Accrual  Certificates and  excludes  any
                        shortfalls  and losses described  in the two immediately
                        preceding paragraphs),  the  amount of  interest  to  be
                        distributed  (or to be added to the principal balance of
                        the Accrual Certificates)  will be  allocated among  the
                        outstanding  subclasses of Class A Certificates pro rata
                        in accordance  with  their  respective  entitlements  to
                        interest, and the amount of any deficiency will be added
                        to  the amount of interest that the Class A Certificates
                        are  entitled  to  receive  on  subsequent  Distribution
                        Dates. No interest will accrue on such deficiences.
                        To the extent that the amount available for distribution
                        on  any  Distribution  Date, after  the  payment  of all
                        amounts due the Class A  Certificates has been made,  is
                        insufficient  to permit distribution  in full of accrued
                        interest (net  of any  shortfalls and  losses  described
                        above)  on the Class  M Certificates, the  amount of any
                        deficiency will be added to the amount of interest  that
                        the Class M Certificates are entitled to receive on sub-
                        sequent  Distribution Dates. No  interest will accrue on
                        such deficiences.
                        Interest on the Class A and Class M Certificates will be
                        calculated on the basis of a 360-day year consisting  of
                        twelve 30-day months.
                        See  "Description of the Certificates--Interest" in this
                        Prospectus Supplement.
                        PRINCIPAL  DISTRIBUTIONS.    The  aggregate  amount   of
                        principal   to  which   the  holders  of   the  Class  A
                        Certificates are entitled each month will be composed of
                        a percentage of the  scheduled payments of principal  on
                        the   Mortgage  Loans   and  a   percentage  of  certain
                        unscheduled payments of principal on the Mortgage Loans.
                        The percentage of scheduled  payments will be equal,  on
                        each  Distribution Date, to the fraction that represents
                        the ratio of the  then-outstanding principal balance  of
                        the   Class  A  Certificates   to  the  then-outstanding
                        principal balances of the Class  A, Class M and Class  B
                        Certificates   combined.   The  percentage   of  certain
                        unscheduled payments  will be  equal to  the  percentage
                        described  in the preceding  sentence plus an additional
                        amount equal to a percentage of the principal  otherwise
                        distributable   to  the  holders   of  the  Subordinated
                        Certificates.  In   general,  the   percentage  of   the
                        principal  otherwise distributable to the holders of the
                        Subordinated Certificates that is instead  distributable
                        to the holders of the Class A Certificates will be equal
                        to  100% during  the first  five years  beginning on the
                        first Distribution  Date  and will  decline  during  the
                        subsequent  four years,  as described  under the heading
                        "Description of  the Certificates--Principal  (Including
                        Prepayments)--Calculation of Amount to be Distributed to
                        the Class A Certificates" in
</TABLE>
 
                                      S-10
<PAGE>
 
<TABLE>
<S>                     <C>
                        this  Prospectus Supplement, until in  year ten and each
                        year  thereafter   it  is   equal  to   zero.  On   each
                        Distribution  Date,  the Subordinated  Certificates will
                        collectively be entitled to  receive the percentages  of
                        the   scheduled  and  certain  unscheduled  payments  of
                        principal on the Mortgage Loans equal, in each case,  to
                        100%  less  the applicable  percentage  for the  Class A
                        Certificates described above.
                        Except as  described  in  the next  paragraph,  on  each
                        Distribution  Date,  the  Class M  Certificates  will be
                        entitled to a portion of scheduled payments and  certain
                        unscheduled  payments of principal on the Mortgage Loans
                        allocable  to   the   Subordinated   Certificates   that
                        represents  the ratio of the then--outstanding principal
                        balance of  the Class  M Certificates  to the  then-out-
                        standing   principal   balance   of   the   Subordinated
                        Certificates.
                        EFFECT   OF    SUBORDINATION   LEVELS    ON    PRINCIPAL
                        DISTRIBUTIONS.  In order to preserve the availability of
                        the original subordination levels as protection  against
                        losses  on the Class  M, Class B-1,  Class B-2 and Class
                        B-3 Certificates, some or all  of the subclasses of  the
                        Class  B Certificates,  as described  below, may  not be
                        entitled on certain Distribution Dates to  distributions
                        of   principal  and   the  principal   balance  of  such
                        subclasses will not  be considered for  purposes of  the
                        allocation   of   principal   among   the   Subordinated
                        Certificates. In the case  of the Class M  Certificates,
                        if  on any Distribution Date  the percentage obtained by
                        dividing the outstanding principal balance of the  Class
                        B  Certificates by the sum  of the outstanding principal
                        balances  of  the   Class  A,  Class   M  and  Class   B
                        Certificates  is less than such  percentage was upon the
                        initial issuance  of  the Series  1992-13  Certificates,
                        then  the Class B  Certificates will not  be entitled to
                        distributions of principal on  such a Distribution  Date
                        and  the Class  M Certificates  will be  entitled to all
                        distributions of principal allocable to the Subordinated
                        Certificates for such Distribution Date. In the case  of
                        the  Class B-1, Class B-2  or Class B-3 Certificates, if
                        on any  Distribution  Date the  percentage  obtained  by
                        dividing  the  outstanding  principal  balances  of  the
                        subclasses of Class B Certificates with higher numerical
                        designations by  the sum  of the  outstanding  principal
                        balances   of  the  Class   A,  Class  M   and  Class  B
                        Certificates is less than  such percentage was upon  the
                        initial  issuance  of the  Series  1992-13 Certificates,
                        then such subclasses with higher numerical  designations
                        will  not be entitled to  distributions of principal and
                        the principal balances  of such subclasses  will not  be
                        taken  into  account  for  purposes  of  calculating the
                        portions of scheduled and unscheduled principal payments
                        allocable  to  the  Class  M  Certificates  and  to  the
                        subclasses  of Class B Certificates with lower numerical
                        designations. In any such case, the Class M Certificates
                        will  receive  a  greater   portion  of  scheduled   and
                        unscheduled  payments of principal on the Mortgage Loans
                        allocable to  the  Subordinated  Certificates  than  the
                        Class  M Certificates  would have received  had all sub-
                        classes of  the Class  B Certificates  been entitled  to
                        their   portion   of   such   principal   payments.  See
                        "Description of  the Certificates--Principal  (including
                        Prepayments)--Calculation of Amount to be Distributed to
                        the Class M Certificates" in this Prospectus Supplement.
</TABLE>
 
                                      S-11
<PAGE>
<TABLE>
<S>                     <C>
                        The  amount that  is available  for distribution  to the
                        holders of the Class A Certificates on any  Distribution
                        Date  as a distribution  of principal is  the sum of (i)
                        the amount  remaining  after  deducting  the  amount  of
                        interest  distributable  on  the  Class  A  Certificates
                        (including the amount added to the principal balance  of
                        the   Accrual  Certificates)   from  the   total  amount
                        collected that is available to be distributed to holders
                        of the Series 1992-13 Certificates on such  Distribution
                        Date  and (ii) the amount of  interest, if any, added to
                        the principal balance of  the Accrual Certificates  with
                        respect  to  such Distribution  Date. Principal  will be
                        distributed to the holders  of the Class A  Certificates
                        in  accordance  with  the  payment  priorities described
                        under the  heading  "Description of  the  Certificates--
                        Principal (Including Prepayments)-- Allocation of Amount
                        to be Distributed" in this Prospectus Supplement.
                        The  amount that  is available  for distribution  to the
                        holders of the Class M Certificates on any  Distribution
                        Date  as  a  distribution  of  principal  is  the amount
                        remaining after all interest and principal distributions
                        due on the Class A Certificates and interest due on  the
                        Class  M Certificates have been  deducted from the total
                        amount collected that is available to be distributed  to
                        holders of the Series 1992-13 Certificates.
Credit Enhancement....  DESCRIPTION  OF "SHIFTING-INTEREST"  SUBORDINATION.  The
                        rights of the  holders of  the Class  M Certificates  to
                        receive distributions will be subordinated to the rights
                        of  the holders of  the Class A  Certificates to receive
                        distributions,  to  the  extent  described  herein.  The
                        rights  of the  holders of  the Class  B Certificates to
                        receive distributions will be subordinated to the rights
                        of the holders of the  Class A and Class M  Certificates
                        to receive distributions to the extent described herein.
                        This   subordination  provides   a  certain   amount  of
                        protection to the  holders of the  Class A  Certificates
                        (to  the extent of the subordination  of the Class M and
                        Class B Certificates) and  the Class M Certificates  (to
                        the   extent  of  the  subordination   of  the  Class  B
                        Certificates) against delays in the receipt of scheduled
                        payments of interest  and principal  and against  losses
                        associated  with the  liquidation of  defaulted Mortgage
                        Loans and  losses resulting  from  the bankruptcy  of  a
                        mortgagor.  The protection  afforded the  holders of the
                        Class A Certificates by means of this subordination will
                        be effected in two ways:  (i) by the preferential  right
                        of  the holders of the  Class A Certificates to receive,
                        prior to any distribution being made on any Distribution
                        Date in respect of the Class M and Class B Certificates,
                        the amounts of interest and principal due the holders of
                        the Class A Certificates on such date and, if necessary,
                        by  the  right  of   such  holders  to  receive   future
                        distributions  on the  Mortgage Loans  that would other-
                        wise have been allocated to  the holders of the Class  M
                        and  Class B Certificates; and (ii) by the allocation to
                        the holders of the Class  M and Class B Certificates  of
                        certain  amounts and types of  losses resulting from the
                        liquidation of the Mortgage  Loans or the bankruptcy  of
                        the mortgagor.
                        The  protection  afforded  the holders  of  the  Class M
                        Certificates by means of this subordination will also be
                        effected in two ways: (i)  by the preferential right  of
                        the  holders  of the  Class  M Certificates  to receive,
                        prior to any distribution being made on any Distribution
                        Date  in  respect  of  the  Class  B  Certificates,  the
</TABLE>
 
                                      S-12
<PAGE>
<TABLE>
<S>                     <C>
                        amounts of interest and principal due the holders of the
                        Class  M Certificates on such date and, if necessary, by
                        the  right   of   such   holders   to   receive   future
                        distributions on the Mortgage Loans that would otherwise
                        have  been  allocated  to  the holders  of  the  Class B
                        Certificates; and (ii) by the allocation to the  holders
                        of the Class B Certificates of certain amounts and types
                        of losses resulting from the liquidation of the Mortgage
                        Loans or the bankruptcy of the mortgagor.
                        In  order  to  increase  the  period  during  which  the
                        principal  balance  of  the  Subordinated   Certificates
                        remains   available  to  absorb   losses  on  liquidated
                        Mortgage Loans, a disproportionate amount of prepayments
                        and other  unscheduled recoveries  with respect  to  the
                        Mortgage   Loans  will  be  allocated  to  the  Class  A
                        Certificates.  This   allocation  has   the  effect   of
                        accelerating   the   amortization   of   the   Class   A
                        Certificates while, in the absence of losses in  respect
                        of  liquidations of  Mortgage Loans  or losses resulting
                        from the  bankruptcy of  the mortgagor,  increasing  the
                        respective  interest  in  the principal  balance  of the
                        Mortgage   Loans   evidenced    by   the    Subordinated
                        Certificates.
                        EXTENT  OF LOSS  COVERAGE.  Realized  losses on Mortgage
                        Loans, other than  losses that are  (i) attributable  to
                        "special  hazards" not insured  against under a standard
                        hazard insurance  policy,  (ii)  incurred  on  defaulted
                        Mortgage  Loans  as  to  which there  was  fraud  in the
                        origination of such Mortgage Loans or (iii) attributable
                        to certain actions  which may be  taken by a  bankruptcy
                        court  in connection  with a Mortgage  Loan, including a
                        reduction by a bankruptcy court of the principal balance
                        of or the interest rate on a Mortgage Loan or an  exten-
                        sion of its maturity, will not be allocated to the Class
                        A  Certificates until  the date  on which  the aggregate
                        principal  balance   of  the   Class  M   and  Class   B
                        Certificates   (which  aggregate   balance  is  expected
                        initially to  be  approximately  $24,498,441)  has  been
                        reduced to zero and will not be allocated to the Class M
                        Certificates  until  the  date  on  which  the aggregate
                        principal balance  of the  Class B  Certificates  (which
                        aggregate   balance  is  expected  to  be  approximately
                        $16,704,441) has been reduced to zero. Such losses  will
                        be  allocated first among the  subclasses of the Class B
                        Certificates, sequentially and in reverse numerical  or-
                        der,  to the Class  B-4, Class B-3,  Class B-2 and Class
                        B-1  Certificates,   and   second   to   the   Class   M
                        Certificates. With respect to any Distribution Date, the
                        availability  of the Class B and Class M Certificates to
                        absorb losses will be affected by the prior reduction of
                        the principal  balances  of  the Class  M  and  Class  B
                        Certificates.  Reduction of the principal balance of the
                        Class M Certificates  and each subclass  of the Class  B
                        Certificates  will result from  (i) the prior allocation
                        of losses on  liquidation of  defaulted Mortgage  Loans,
                        including losses due to special hazards and fraud losses
                        up  to  the  limit  referred to  below,  (ii)  the prior
                        allocation of bankruptcy losses up to the limit referred
                        to below  and  (iii)  the  prior  receipt  of  principal
                        distributions  by the holders of such class or subclass.
                        As of  the  date  of  issuance  of  the  Series  1992-13
                        Certificates,  the  amount  of  losses  attributable  to
                        special hazards,  fraud  and  bankruptcy  that  will  be
                        absorbed   solely  by   the  holders  of   the  Class  B
                        Certificates and then solely by the holders of the Class
                        M Certificates will  be approximately  1.26%, 2.00%  and
                        0.03%,
</TABLE>
 
                                      S-13
<PAGE>
<TABLE>
<S>                     <C>
                        respectively,  of the aggregate principal balance of the
                        Mortgage Loans  as of  the Cut-Off  Date  (approximately
                        $5,612,335,   $8,908,469  and  $137,158,  respectively).
                        These  amounts  may  be   reduced  as  described   under
                        "Description  of the  Certificates--Subordination of the
                        Class M and Class B Certificates--Allocation of  Losses"
                        in  this Prospectus Supplement. If losses due to special
                        hazards, fraud or bankruptcy exceed any of such  amounts
                        prior to the principal balances of the Class M and Class
                        B  Certificates being reduced to  zero, such losses will
                        be shared by the subclasses of Class A Certificates  and
                        the   Class  M  and  Class  B  Certificates.  After  the
                        principal  balances  of   the  Class  M   and  Class   B
                        Certificates have been reduced to zero, such losses will
                        be shared by the subclasses of Class A Certificates.
                        THE  YIELD TO MATURITY ON  THE CLASS M CERTIFICATES WILL
                        BE MORE SENSITIVE TO LOSSES  DUE TO LIQUIDATIONS OF  THE
                        MORTGAGE LOANS (AND THE TIMING THEREOF) THAN THE CLASS A
                        CERTIFICATES,  TO THE EXTENT  THAT THE PRINCIPAL BALANCE
                        OF THE CLASS B CERTIFICATES HAS BEEN REDUCED TO ZERO.
                        See "Description of  the Certificates--Subordination  of
                        Class  M and  Class B  Certificates" in  this Prospectus
                        Supplement.
Effects of Prepayments
  on Investment
  Expectations........  The actual  rate  of  prepayment  of  principal  on  the
                        Mortgage  Loans  can  not be  predicted.  The investment
                        performance  of  the   Offered  Certificates  may   vary
                        materially    and   adversely    from   the   investment
                        expectations of  investors, due  to prepayments  on  the
                        Mortgage  Loans being higher  or lower than anticipated.
                        It is possible that the actual yield to the holder of an
                        Offered Certificate  may  not  be  equal  to  the  yield
                        anticipated  at the time of  purchase of the Certificate
                        or, notwithstanding that  the actual yield  is equal  to
                        the  yield  anticipated  at that  time,  that  the total
                        return on  investment expected  by the  investor or  the
                        expected  weighted average  life of  the Certificate may
                        not be realized. These effects are highlighted below. IN
                        DECIDING WHETHER TO  PURCHASE ANY OFFERED  CERTIFICATES,
                        AN  INVESTOR SHOULD  MAKE AN INDEPENDENT  DECISION AS TO
                        THE APPROPRIATE PREPAYMENT ASSUMPTIONS TO BE USED.
                        YIELD.  If an investor purchases an Offered  Certificate
                        at an amount equal to its unpaid principal balance (that
                        is,  at  "par"), the  effective  yield to  that investor
                        (assuming there are no shortages in interest collections
                        that are not covered by servicing fees otherwise payable
                        to  the  Servicer  and   assuming  the  return  of   the
                        purchaser's  invested  principal in  its  entirety) will
                        approximate the pass-through  rate on that  Certificate.
                        If  an  investor  pays  less  or  more  than  the unpaid
                        principal balance of the Certificate (that is, buys  the
                        Certificate at a "discount" or "premium," respectively),
                        then,   based  on  the  assumptions  set  forth  in  the
                        preceding sentence, the effective yield to the  investor
                        will  be higher or lower,  respectively, than the stated
                        interest rate on the Certificate, because such  discount
                        or  premium  will  be  amortized over  the  life  of the
                        Certificate.  Any  deviation  in  the  actual  rate   of
                        prepayments  on the Mortgage Loans from the rate assumed
                        by the  investor will  affect the  period of  time  over
                        which,  or the  rate at  which, the  discount or premium
                        will be  amortized and,  consequently, will  change  the
                        investor's   actual  yield  from  that  anticipated.  AN
                        INVESTOR THAT PURCHASES ANY
</TABLE>
 
                                      S-14
<PAGE>
<TABLE>
<S>                     <C>
                        OFFERED CERTIFICATES  AT  A  DISCOUNT  SHOULD  CAREFULLY
                        CONSIDER THE RISK THAT A SLOWER THAN ANTICIPATED RATE OF
                        PRINCIPAL  PAYMENTS ON THE MORTGAGE LOANS WILL RESULT IN
                        AN ACTUAL YIELD THAT IS  LOWER THAN THE EXPECTED  YIELD.
                        AN INVESTOR THAT PURCHASES ANY OFFERED CERTIFICATES AT A
                        PREMIUM  SHOULD  CONSIDER THE  RISK  THAT A  FASTER THAN
                        ANTICIPATED RATE OF PRINCIPAL  PAYMENTS ON THE  MORTGAGE
                        LOANS  WILL RESULT IN AN ACTUAL YIELD THAT IS LOWER THAN
                        THE EXPECTED YIELD.
                        REINVESTMENT RISK.  As stated above, if a Certificate is
                        purchased at  an amount  equal to  its unpaid  principal
                        balance,  fluctuations in  the rate  of distributions of
                        principal  will  generally  not  affect  the  yield   to
                        maturity  of that Certificate. However, the total return
                        on any purchaser's investment, including an investor who
                        purchases at par,  will be  reduced to  the extent  that
                        principal  distributions received on its Certificate can
                        not be  reinvested  at a  rate  as high  as  the  stated
                        interest  rate  of  the  Certificate.  Investors  in the
                        Offered Certificates should consider the risk that rapid
                        rates of prepayments on the Mortgage Loans may  coincide
                        with  periods of  low prevailing  market interest rates.
                        During periods of low prevailing market interest  rates,
                        mortgagors  may  be  expected  to  prepay  or  refinance
                        Mortgage Loans that  carry interest rates  significantly
                        higher  than  then-current interest  rates  for mortgage
                        loans.   Consequently,   the    amount   of    principal
                        distributions  available to an investor for reinvestment
                        at such low prevailing interest rates may be  relatively
                        large.  Conversely,  slow  rates of  prepayments  on the
                        Mortgage  Loans  may  coincide  with  periods  of   high
                        prevailing  market interest rates.  During such periods,
                        it is less likely that  mortgagors will elect to  prepay
                        or  refinance Mortgage Loans  and, therefore, the amount
                        of principal distributions available to an investor  for
                        reinvestment  at such high prevailing interest rates may
                        be relatively small.
                        WEIGHTED AVERAGE LIFE VOLATILITY.  One indication of the
                        impact of varying prepayment speeds on a security is the
                        change in  its  weighted  average  life.  The  "weighted
                        average  life" of an Offered  Certificate is the average
                        amount of  time that  will elapse  between the  date  of
                        issuance   of  the  Certificate  until  each  dollar  in
                        reduction of the principal balance of the Certificate is
                        distributed to the investor. Low rates of prepayment may
                        result in extension  of the weighted  average life of  a
                        Certificate;  high  rates,  in  the  shortening  of such
                        weighted average  life.  In  general,  if  the  weighted
                        average  life  of  a  Certificate  purchased  at  par is
                        extended  beyond   that  initially   anticipated,   such
                        Certificate's  market  value may  be  adversely affected
                        even though the yield to maturity on the Certificate  is
                        unaffected.  The weighted average lives of the Companion
                        Certificates   will   be   particularly   sensitive   to
                        prepayments  on the  Mortgage Loans  at certain constant
                        rates of SPA, because payments of principal allocated to
                        the Class A Certificates in excess of certain prepayment
                        levels will  be paid  to the  holders of  the  Companion
                        Certificates   rather  than  the   holders  of  the  PAC
                        Certificates. The weighted average lives of the  Offered
                        Certificates,  under  various prepayment  scenarios, are
                        displayed in  the  tables appearing  under  the  heading
                        "Prepayment and Yield Considerations."
</TABLE>
 
                                      S-15
<PAGE>
<TABLE>
<S>                     <C>
                        See    "Prepayment   and   Yield   Considerations"   and
                        "Description of  the Certificates--Principal  (Including
                        Prepayments)--Principal  Payment Characteristics  of the
                        PAC Certificates and the Companion Certificates" in this
                        Prospectus Supplement.
Federal Income Tax
  Status..............  An election will be made to treat the Trust Estate as  a
                        real  estate mortgage  investment conduit  (the "REMIC")
                        for federal income  tax purposes. The  Class A-1,  Class
                        A-2,  Class A-3, Class A-4,  Class A-5, Class A-6, Class
                        A-7, Class  A-8,  Class  A-9, Class  A-10  and  Class  M
                        Certificates   and   each  subclass   of  the   Class  B
                        Certificates will be designated as the regular interests
                        in the  REMIC, and  the Class  A-R Certificate  will  be
                        designated as the residual interest in the REMIC.
                        Beneficial   owners  of  the  Regular  Certificates  (as
                        defined  herein)  will  be  required  to  report  income
                        thereon   in  accordance  with  the  accrual  method  of
                        accounting. The Class  A-7 Certificates  will be  issued
                        with  original  issue  discount for  federal  income tax
                        purposes in  an  amount  equal  to  the  excess  of  all
                        distributions of principal and interest thereon (whether
                        current  or accrued)  over their  issue price (including
                        accrued interest). It is anticipated that the Class A-8,
                        Class A-9 and Class M  Certificates will be issued  with
                        original issue discount in an amount equal to the excess
                        of the initial principal balances thereof over their re-
                        spective  issue prices (including  accrued interest). It
                        is also anticipated that the Class A-1, Class A-2, Class
                        A-3, Class A-4 and Class A-6 Certificates will be issued
                        at a premium and that the Class A-5 Certificates will be
                        issued with  DE  MINIMIS  original  issue  discount  for
                        federal income tax purposes.
                        The holder of the Class A-R Certificate will be required
                        to  include the taxable  income or loss  of the REMIC in
                        determining  its   federal   taxable   income.   It   is
                        anticipated  that all of the taxable income of the REMIC
                        includible by the  Class A-R  Certificateholder will  be
                        treated  as "excess inclusion" income subject to special
                        limitations for  federal income  tax purposes.  FURTHER,
                        SIGNIFICANT  RESTRICTIONS APPLY  TO THE  TRANSFER OF THE
                        CLASS A-R CERTIFICATE.  THE CLASS A-R  CERTIFICATE IS  A
                        "NONECONOMIC  RESIDUAL  INTEREST," CERTAIN  TRANSFERS OF
                        WHICH  MAY  BE  DISREGARDED   FOR  FEDERAL  INCOME   TAX
                        PURPOSES.
                        See  "Description  of the  Certificates--Restrictions on
                        Transfer of  the  Class A-R  Certificate"  and  "Federal
                        Income Tax Considerations" in this Prospectus Supplement
                        and  "Certain  Federal Income  Tax Consequences--Federal
                        Income Tax Consequences for  REMIC Certificates" in  the
                        Prospectus.
ERISA
  Considerations......  A  fiduciary of any employee benefit plan subject to the
                        Employee Retirement  Income  Security Act  of  1974,  as
                        amended ("ERISA"), or the Internal Revenue Code of 1986,
                        as  amended (the  "Code"), should  carefully review with
                        its legal advisors  whether the purchase  or holding  of
                        Class  A or  Class M Certificates  could give  rise to a
                        transaction  prohibited  or  not  otherwise  permissible
                        under   ERISA  or   the  Code.   BECAUSE  THE   CLASS  M
                        CERTIFICATES   ARE   SUBORDINATED   TO   THE   CLASS   A
                        CERTIFICATES,  THE  CLASS  M  CERTIFICATES  MAY  NOT  BE
                        PURCHASED BY OR TRANSFERRED TO AN ERISA PLAN EXCEPT UPON
                        THE DELIVERY OF AN
</TABLE>
 
                                      S-16
<PAGE>
<TABLE>
<S>                     <C>
                        OPINION OF COUNSEL AS DESCRIBED UNDER "ERISA  CONSIDERA-
                        TIONS"  IN  THIS  PROSPECTUS SUPPLEMENT.  THE  CLASS A-R
                        CERTIFICATE MAY NOT BE PURCHASED BY OR TRANSFERRED TO AN
                        ERISA  PLAN.   See   "ERISA  Considerations"   in   this
                        Prospectus Supplement and in the Prospectus.
Legal Investment......  The  Offered  Certificates constitute  "mortgage related
                        securities"  for  purposes  of  the  Secondary  Mortgage
                        Market  Enhancement Act of 1984  and, as such, are legal
                        investments for certain entities to the extent  provided
                        in  such act. However, there are regulatory requirements
                        and considerations  applicable  to  regulated  financial
                        institutions  and  restrictions on  the ability  of such
                        institutions to  invest  in certain  types  of  mortgage
                        related   securities.  Prospective   purchasers  of  the
                        Offered Certificates should consult their own legal, tax
                        and accounting advisors  in determining the  suitability
                        of  and consequences to them  of the purchase, ownership
                        and disposition of the Offered Certificates. See  "Legal
                        Investment" in this Prospectus Supplement.
</TABLE>
 
                                      S-17
<PAGE>
                        DESCRIPTION OF THE CERTIFICATES
 
GENERAL
 
    The  Book-Entry Certificates  will be  issued only  in book-entry  form. The
Book-Entry Certificates  will be  issued in  minimum denominations  of  $100,000
initial  principal balance  and integral  multiples of  $1,000 initial principal
balance in excess  thereof. The  Class M Certificates  will be  issued in  fully
registered,  certificated  form, in  minimum  denominations of  $100,000 initial
principal balance and integral multiples of $1,000 initial principal balance  in
excess  thereof. The Class  A-R Certificate will be  issued in fully registered,
certificated form, in a single certificate with a denomination of $1,000 initial
principal balance.
 
    Each Subclass of Book-Entry Certificates initially will be represented by  a
single  physical certificate registered in  the name of Cede  & Co. ("Cede"), as
nominee of  DTC, which  will  be the  "holder"  or "Certificateholder"  of  such
Certificates,  as such terms are used herein. No person acquiring an interest in
the Book-Entry Certificates (a "Beneficial Owner") will be entitled to receive a
certificate representing such person's interest in the Book-Entry  Certificates,
except  as set forth  below under "--Definitive  Certificates." Unless and until
Definitive Certificates  are issued  under the  limited circumstances  described
herein,  all references to actions taken by Certificateholders or holders shall,
in the case of the Book-Entry Certificates,  refer to actions taken by DTC  upon
instructions from its Participants (as defined below), and all references herein
to  distributions,  notices,  reports and  statements  to  Certificateholders or
holders  shall,  in  the   case  of  the   Book-Entry  Certificates,  refer   to
distributions, notices, reports and statements to DTC or Cede, as the registered
holder  of the Book-Entry Certificates, as the  case may be, for distribution to
Beneficial  Owners  in  accordance   with  DTC  procedures.  See   "--Book-Entry
Registration" below.
 
BOOK-ENTRY REGISTRATION
 
    DTC is a limited purpose trust company organized under the laws of the State
of  New York, a member  of the Federal Reserve  System, a "clearing corporation"
within the  meaning of  the New  York  UCC and  a "clearing  agency"  registered
pursuant  to Section 17A of the Securities Exchange Act of 1934, as amended. DTC
was  created   to   hold   securities  for   its   participating   organizations
("Participants")  and to facilitate  the clearance and  settlement of securities
transactions  among  Participants   through  electronic  book-entries,   thereby
eliminating the need for physical movement of certificates. Participants include
securities  brokers  and  dealers  (including  the  Underwriter),  banks,  trust
companies and clearing corporations. Indirect access  to the DTC system also  is
available  to banks,  brokers, dealers,  trust companies  and other institutions
that clear  through or  maintain a  custodial relationship  with a  Participant,
either directly or indirectly ("Indirect Participants").
 
    Under  the rules, regulations and procedures  creating and affecting DTC and
its operations (the "Rules"),  DTC is required to  make book-entry transfers  of
Book-Entry  Certificates among Participants on whose behalf it acts with respect
to the  Book-Entry Certificates  and to  receive and  transmit distributions  of
principal  of  and interest  on  the Book-Entry  Certificates.  Participants and
Indirect Participants with which Beneficial Owners have accounts with respect to
the Book-Entry Certificates similarly are required to make book-entry  transfers
and  receive and transmit such payments on behalf of their respective Beneficial
Owners.
 
    Beneficial Owners that  are not  Participants or  Indirect Participants  but
desire  to purchase, sell or otherwise transfer ownership of, or other interests
in, Book-Entry Certificates  may do  so only through  Participants and  Indirect
Participants.  In addition, Beneficial Owners  will receive all distributions of
principal and interest from  the Servicer, or  a paying agent  on behalf of  the
Servicer,  through DTC Participants. DTC will  forward such distributions to its
Participants, which thereafter  will forward  them to  Indirect Participants  or
Beneficial  Owners. Beneficial Owners will not be recognized by the Trustee, the
Servicer or any paying agent as Certificateholders, as such term is used in  the
Pooling  and Servicing  Agreement, and  Beneficial Owners  will be  permitted to
exercise the rights of  Certificateholders only indirectly  through DTC and  its
Participants.
 
                                      S-18
<PAGE>
    Because  DTC can  only act  on behalf  of Participants,  who in  turn act on
behalf of Indirect Participants and certain  banks, the ability of a  Beneficial
Owner  to  pledge Book-Entry  Certificates to  persons or  entities that  do not
participate in  the  DTC  system, or  to  otherwise  act with  respect  to  such
Book-Entry  Certificates,  may  be  limited  due  to  the  lack  of  a  physical
certificate for such  Book-Entry Certificates. In  addition, under a  book-entry
format,  Beneficial Owners may  experience delays in  their receipt of payments,
since distributions will be made by the Servicer, or a paying agent on behalf of
the Servicer, to Cede, as nominee for DTC.
 
    DTC has advised  the Seller that  it will  take any action  permitted to  be
taken  by a Certificateholder under the  Pooling and Servicing Agreement only at
the direction  of  one or  more  Participants to  whose  accounts with  DTC  the
Book-Entry  Certificates are credited. Additionally,  DTC has advised the Seller
that it will take such actions  with respect to specified Voting Interests  only
at  the direction of and on behalf  of Participants whose holdings of Book-Entry
Certificates evidence such specified Voting Interests. DTC may take  conflicting
actions  with respect to Voting Interests  to the extent that Participants whose
holdings of  Book-Entry Certificates  evidence such  Voting Interests  authorize
divergent action.
 
    Neither   the  Seller,   the  Servicer  nor   the  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 Certificates held by
Cede,  as  nominee for  DTC, or  for maintaining,  supervising or  reviewing any
records relating to such beneficial ownership interests.
 
DEFINITIVE CERTIFICATES
 
    Book-Entry Certificates  will be  issued in  fully registered,  certificated
form  ("Definitive Certificates") to Beneficial Owners or their nominees, rather
than to DTC  or its nominee,  only if (i)  the Servicer advises  the Trustee  in
writing  that  DTC  is no  longer  willing  or able  to  discharge  properly its
responsibilities as depository with respect  to the Book-Entry Certificates  and
the  Servicer is unable to  locate a qualified successor,  (ii) the Servicer, at
its option, elects to terminate the book-entry system through DTC or (iii) after
the occurrence of a dismissal or  resignation of the Servicer under the  Pooling
and Servicing Agreement, Beneficial Owners representing not less than 51% of the
Voting Interests of each outstanding class of Book-Entry Certificates advise the
Trustee  through DTC, in  writing, that the continuation  of a book-entry system
through DTC (or a successor thereto) is no longer in the Beneficial Owners' best
interest.
 
    Upon the  occurrence of  any event  described in  the immediately  preceding
paragraph,  the Trustee will be required to notify all Beneficial Owners through
Participants of the availability of  Definitive Certificates. Upon surrender  by
DTC  of the definitive certificates representing the Book-Entry Certificates and
receipt of  instructions  for  re-registration, the  Trustee  will  reissue  the
Book-Entry   Certificates  as  Definitive  Certificates  to  Beneficial  Owners.
Distributions of principal of, and interest on, the Book-Entry Certificates will
thereafter be made by the Servicer, or a paying agent on behalf of the Servicer,
directly to holders of Definitive Certificates in accordance with the procedures
set forth in the Pooling and Servicing Agreement.
 
    Definitive Certificates will be transferable and exchangeable at the offices
of the Trustee or the certificate  registrar. No service charge will be  imposed
for  any  registration of  transfer  or exchange,  but  the Trustee  may require
payment of  a sum  sufficient to  cover  any tax  or other  governmental  charge
imposed in connection therewith.
 
DISTRIBUTIONS
 
    Distributions  of interest and in reduction  of principal balance to holders
of Class A Certificates of each Subclass will be made monthly, to the extent  of
each  Subclass' entitlement thereto, on  the 25th day of  each month or, if such
day is not a business day, on the succeeding business day (each, a "Distribution
Date"), beginning in  June 1992, in  an aggregate  amount equal to  the Class  A
Distribution  Amount. Distributions  of interest  and in  reduction of principal
balance to holders of Class M Certificates  will be made monthly, to the  extent
of  the Class M Certificates' entitlement  thereto, on each Distribution Date in
an aggregate amount equal to the  Class M Distribution Amount after all  amounts
in respect of interest
 
                                      S-19
<PAGE>
and  principal  due  on the  Class  A  Certificates for  such  Distribution Date
including all previously unpaid Class A Subclass Interest Shortfall Amounts with
respect  to  any  Subclass  of  Class   A  Certificates  have  been  paid.   The
"Determination Date" with respect to each Distribution Date will be the 17th day
of each month, or if such day is not a business day, the preceding business day.
Distributions  will  be made  on  each Distribution  Date  to holders  of record
(which, in the case of the Book-Entry Certificates, will be Cede, as nominee for
DTC) at the close of  business on the last day  of the preceding month (each,  a
"Record  Date"), except that the  final distribution in respect  of each Class A
Certificate of any Subclass and each Class M Certificate will only be made  upon
presentation  and surrender of such Class A or Class M Certificate at the office
or agency  appointed  by  the Trustee  and  specified  in the  notice  of  final
distribution  in respect  of such  Subclass of Class  A Certificates  or Class M
Certificate.
 
    The aggregate  amount available  for distribution  to Certificateholders  on
each  Distribution  Date  will  be  the  Pool  Distribution  Amount.  The  "Pool
Distribution Amount" for a Distribution Date  will be the sum of all  previously
undistributed  payments  or other  receipts on  account of  principal (including
principal prepayments and Liquidation Proceeds in respect of principal, if  any)
and  interest on or  in respect of  the Mortgage Loans  received by the Servicer
after the Cut-Off Date (except for amounts due on or prior to the Cut-Off Date),
or received by the Servicer  on or prior to the  Cut-Off Date but due after  the
Cut-Off  Date, in either case received on  or prior to the Determination Date in
the month in which such Distribution Date occurs, plus (i) all Periodic Advances
made by the Servicer  and (ii) all  other amounts required to  be placed in  the
Certificate  Account  by  the Servicer  pursuant  to the  Pooling  and Servicing
Agreement, but excluding the following:
 
        (a)  amounts  received  as  late  payments  of  principal  or   interest
    respecting  which the Servicer previously has  made one or more unreimbursed
    Periodic Advances;
 
        (b) any unreimbursed Periodic Advances with respect to Liquidated Loans;
 
        (c) those portions of each payment of interest on a particular  Mortgage
    Loan which represent the applicable Servicing Fee, as adjusted in respect of
    Prepayment Interest Shortfalls as described under "--Interest" below;
 
        (d)  all  amounts  representing  scheduled  payments  of  principal  and
    interest due  after  the Due  Date  occurring in  the  month in  which  such
    Distribution Date occurs;
 
        (e)  all principal prepayments in full  and all proceeds of any Mortgage
    Loans, or  property acquired  in  respect thereof,  liquidated,  foreclosed,
    purchased  or repurchased pursuant  to the Pooling  and Servicing Agreement,
    received on or  after the  Due Date  occurring in  the month  in which  such
    Distribution  Date occurs, and all  partial principal prepayments applied by
    the Servicer on or  after the Determination Date  occurring in the month  in
    which such Distribution Date occurs, and all related payments of interest on
    such amounts;
 
         (f)  to the  extent permitted by  the Pooling  and Servicing Agreement,
    that portion of Liquidation Proceeds or insurance proceeds with respect to a
    Mortgage Loan  which  represents  any  unpaid Servicing  Fee  to  which  the
    Servicer is entitled;
 
        (g)  all  amounts  representing  certain  expenses  reimbursable  to the
    Servicer and  other amounts  permitted to  be retained  by the  Servicer  or
    withdrawn  by  the Servicer  from the  Certificate  Account pursuant  to the
    Pooling and Servicing Agreement;
 
        (h) all amounts in the nature of late fees, assumption fees,  prepayment
    fees and similar fees which the Servicer is entitled to retain as additional
    servicing compensation;
 
         (i)  reinvestment  earnings  on  payments received  in  respect  of the
    Mortgage Loans; and
 
         (j) Net Foreclosure Profits.
 
                                      S-20
<PAGE>
    On each Distribution Date,  the Pool Distribution  Amount will be  allocated
among  the Classes  of Certificates  and distributed  to the  holders thereof of
record as of the related Record  Date as follows (the "Pool Distribution  Amount
Allocation"):
 
        FIRST, to each Subclass of Class A Certificates, pro rata based on their
    respective Class A Subclass Interest Accrual Amounts, in an aggregate amount
    up  to the Class A Interest Accrual Amount with respect to such Distribution
    Date; provided, that prior to the Accretion Termination Date, the amount  of
    interest  that would otherwise be  distributable to the Accrual Certificates
    will instead be distributed in reduction  of the Class A Subclass  Principal
    Balance  of the Subclass or Subclasses of Class A Certificates then entitled
    to receive distributions  in reduction  of principal  balance in  accordance
    with   the  priorities   set  forth  below   under  "--Principal  (Including
    Prepayments)--Allocation of  Amount to  be Distributed  to the  Class A  and
    Class M Certificates;"
 
        SECOND,  to each  Subclass of  Class A  Certificates, pro  rata based on
    their respective unpaid Class A  Subclass Interest Shortfall Amounts, in  an
    aggregate  amount up to  the sum of  the previously unpaid  Class A Subclass
    Interest  Shortfall  Amounts;   provided,  that  prior   to  the   Accretion
    Termination  Date, the amount  that would otherwise  be distributable to the
    Accrual Certificates pursuant to this provision will instead be  distributed
    in  reduction of the Class  A Subclass Principal Balance  of the Subclass or
    Subclasses of Class A Certificates then entitled to receive distributions in
    reduction of principal balance in  accordance with the priorities set  forth
    below under "--Principal (Including Prepayments)--Allocation of Amount to be
    Distributed to the Class A and Class M Certificates;"
 
        THIRD,  to each Subclass of Class A Certificates, in an aggregate amount
    up to  the  Class  A  Optimal Principal  Amount,  such  distribution  to  be
    allocated  among such Subclasses in accordance with the priorities set forth
    below under "--Principal (Including Prepayments)--Allocation of Amount to be
    Distributed to the Class A and Class M Certificates;"
 
        FOURTH, to the Class M Certificates in amount up to the Class M Interest
    Accrual Amount with respect to such Distribution Date;
 
        FIFTH, to the  Class M Certificates  in an amount  up to the  previously
    unpaid Class M Interest Shortfall Amount;
 
        SIXTH,  to  the Class  M Certificates  in an  amount up  to the  Class M
    Optimal Principal Amount; and
 
        SEVENTH, sequentially to the Class B-1,  Class B-2, Class B-3 and  Class
    B-4  Certificates so that each subclass shall  receive first an amount up to
    its  Class  B  Subclass  Interest  Accrual  Amount  with  respect  to   such
    Distribution  Date, second  an amount up  to its  previously unpaid subclass
    interest shortfall amount  and then  an amount  up to  its subclass  optimal
    principal amount before any subclasses of Class B Certificates with a higher
    numerical  designation  receive  any  payments  in  respect  of  interest or
    principal.
 
    The "Class A Distribution Amount" for any Distribution Date will be equal to
the sum of the amounts distributed  in accordance with priorities FIRST  through
THIRD of the Pool Distribution Amount Allocation set forth above.
 
    The "Class M Distribution Amount" for any Distribution Date will be equal to
the  sum of the amounts distributed in accordance with priorities FOURTH through
SIXTH of the Pool Distribution Amount Allocation set forth above.
 
    The undivided percentage interest (the "Percentage Interest") represented by
any Class A Certificate of a Subclass or Class M Certificate in distributions to
such Subclass or Class will be equal to the percentage obtained by dividing  the
initial principal balance of such Certificate by the aggregate initial principal
balance of all Certificates of such Subclass or Class, as the case may be.
 
                                      S-21
<PAGE>
INTEREST
 
    The  amount  of interest  which  will accrue  on  each Subclass  of  Class A
Certificates during each month  is referred to herein  as the "Class A  Subclass
Interest  Accrual  Amount"  for such  Subclass.  The Class  A  Subclass Interest
Accrual Amount for each Subclass of  Offered Certificates, other than the  Class
A-R  Certificate, will equal the product of  (i) 1/12th of the Pass-Through Rate
for such Subclass and (ii) the outstanding Class A Subclass Principal Balance of
such Subclass. The Pass-Through  Rate for each such  Subclass is the  percentage
set  forth on  the cover  of this  Prospectus Supplement.  The Class  A Subclass
Interest Accrual Amount for the Class A-R Certificate will equal the product  of
(i) 1/12th of 7.50% and (ii) the Class A-R Notional Amount. The Class A Subclass
Interest  Accrual Amount for the Class  A-10 Certificates will equal the product
of (i) 1/12th of (a) the weighted average of the Net Mortgage Interest Rates (as
defined below) of the Mortgage  Loans as of the first  day of such period  minus
(b)  7.50%  and (ii)  the  Class A-10  Notional  Amount. Each  Class  A Subclass
Interest Accrual Amount will be reduced by the portion of (i) any  Non-Supported
Interest  Shortfall allocable to such Subclass  and (ii) the interest portion of
Excess Special Hazard Losses, Excess  Fraud Losses and Excess Bankruptcy  Losses
allocable to such Subclass.
 
    The  amount of interest which will accrue on the Class M Certificates during
each month is referred to herein as  the "Class M Interest Accrual Amount."  The
Class  M Interest Accrual Amount  will equal the product  of (i) 1/12th of 7.50%
and (ii) the outstanding Class M Principal Balance. The Class M Interest Accrual
Amount will  be  reduced  by  (i) the  portion  of  any  Non-Supported  Interest
Shortfall  allocable to the Class M  Certificates, and (ii) the interest portion
of Excess  Special Hazard  Losses,  Excess Fraud  Losses and  Excess  Bankruptcy
Losses allocable to the Class M Certificates.
 
    Each subclass of Class B Certificates will accrue interest during each month
at  a Pass-Through Rate  of 7.50% per  annum. The amount  of interest accrued on
each subclass during each month (the "Class B Subclass Interest Accrual Amount")
will equal the product of (i) 1/12th  of 7.50% and (ii) the outstanding Class  B
Subclass  Principal Balance  of such  subclass. Each  Class B  Subclass Interest
Accrual Amount will be reduced by (i) the portion of any Non-Supported  Interest
Shortfalls  allocable to such  subclass and (ii) the  interest portion of Excess
Special  Hazard  Losses,  Excess  Fraud  Losses  and  Excess  Bankruptcy  Losses
allocable to such subclass as described below.
 
    The  "Class  A  Subclass  Principal  Balance"  of  a  Subclass  of  Class  A
Certificates as of any Determination Date will be the principal balance of  such
Subclass  on the date of  initial issuance of the  Class A Certificates plus, in
the case of the  Accrual Certificates, the portion  of the Accrual  Distribution
Amount,   as  described  under   "--Principal  (Including  Prepayments)"  below,
previously added  to the  Class  A Subclass  Principal  Balance of  the  Accrual
Certificates,  less  (i)  all  amounts  previously  distributed  to  holders  of
Certificates of such  Subclass in  reduction of  the principal  balance of  such
Subclass  and (ii)  such Subclass'  pro rata share  of the  principal portion of
Excess Special Hazard Losses, Excess  Fraud Losses and Excess Bankruptcy  Losses
previously  allocated  to the  holders  of Class  A  Certificates in  the manner
described   herein   under   "--Subordination   of   Class   M   and   Class   B
Certificates--Allocation  of  Losses." After  the Cross-Over  Date, the  Class A
Subclass Principal Balance  of a Subclass  may be subject  to further  reduction
with  respect to a Determination  Date in an amount  equal to such Subclass' pro
rata share of the difference, if any, between (a) the Class A Principal  Balance
as  of such  Determination Date  without regard  to this  provision and  (b) the
Adjusted  Pool  Amount  for  the  preceding  Distribution  Date.  Any  pro  rata
allocation  among  the  Subclasses of  Class  A Certificates  described  in this
paragraph will be made among the Subclasses of Class A Certificates on the basis
of their then outstanding Class A Subclass Principal Balances immediately  prior
to the applicable Distribution Date, or in the case of the Accrual Certificates,
their initial Class A Subclass Principal Balance, if lower.
 
    The  "Class A Principal Balance" as of  any Determination Date will be equal
to the sum of the Class A Subclass Principal Balances of the Subclasses of Class
A Certificates as of such date.
 
    The "Class M  Principal Balance" as  of any Determination  Date will be  the
lesser  of (a) the principal balance of the  Class M Certificates on the date of
initial issuance of  the Class M  Certificates less (i)  all amounts  previously
distributed  to holders  of Class M  Certificates in reduction  of the principal
balance
 
                                      S-22
<PAGE>
thereof and (ii) the principal portion  of Excess Special Hazard Losses,  Excess
Fraud Losses and Excess Bankruptcy Losses previously allocated to the holders of
the  Class M Certificates in the  manner described herein under "--Subordination
of Class M and Class B  Certificates--Allocation of Losses"and (b) the  Adjusted
Pool  Amount as of  the preceding Distribution  Date less the  Class A Principal
Balance as of such Determination Date.
 
    The  "Class  B  Subclass  Principal  Balance"  of  a  subclass  of  Class  B
Certificates  as of any Determination Date will be the lesser of (a) the initial
principal balance of such subclass on the date of initial issuance of the  Class
B  Certificates less (i)  all amounts previously distributed  to holders of such
subclass in reduction of  the principal balance thereof  and (ii) the  principal
portion  of  Excess  Special  Hazard  Losses,  Excess  Fraud  Losses  and Excess
Bankruptcy Losses previously allocated  to the holders of  such subclass in  the
manner  described under "--Subordination  of Class M  and Class B Certificates--
Allocation of  Losses" and  (b) the  Adjusted Pool  Amount as  of the  preceding
Distribution  Date less the  sum of the  Class A Principal  Balance, the Class M
Principal Balance and the Class B Subclass Principal Balances of the  subclasses
of Class B Certificates with lower numerical designations.
 
    The  "Class B Principal Balance" as of any  date will be equal to the sum of
the Class B Subclass Principal Balance of the subclasses of Class B Certificates
as of such date.
 
    With respect to any Distribution Date, the "Adjusted Pool Amount" will equal
the Cut-Off Date Aggregate Principal Balance of the Mortgage Loans minus the sum
of (i) amounts in respect of principal received in respect of the Mortgage Loans
(including amounts  received as  Periodic  Advances, principal  prepayments  and
Liquidation  Proceeds in respect of principal) and distributed to holders of the
Series 1992-13 Certificates on such Distribution Date and all prior Distribution
Dates and (ii)  the principal  portion of all  Realized Losses  incurred on  the
Mortgage Loans from the Cut-off Date through the end of the month preceding such
Distribution Date.
 
    The  "Net Mortgage Interest Rate" on each Mortgage Loan will be equal to the
Mortgage Interest Rate on such Mortgage  Loan as stated in the related  mortgage
note minus the Servicing Fee rate of 0.25% per annum. See "Pooling and Servicing
Agreement--Servicing Compensation and Payment of Expenses" herein.
 
    The "Class A-10 Notional Amount" with respect to each Distribution Date will
be  equal to the Pool Scheduled Principal Balance, as defined under "--Principal
(Including Prepayments)" below,  as of  such Distribution Date.  The Class  A-10
Notional   Amount  with  respect   to  the  first   Distribution  Date  will  be
approximately $445,423,441.
 
    The "Class A-R Notional Amount" with respect to each Distribution Date  will
be  equal to the sum of the Class  A Subclass Principal Balance of the Class A-R
Certificate and  the  Class A  Subclass  Principal  Balance of  the  Class  A-10
Certificates.   The  Class  A-R  Notional  Amount  with  respect  to  the  first
Distribution Date will be $2,000.
 
    Shortfalls in collections of interest  as a result of principal  prepayments
in  full of Mortgage Loans ("Prepayment  Interest Shortfalls") will be offset to
the extent of  the aggregate Servicing  Fees relating to  mortgagor payments  or
other  recoveries distributed  on the  related Distribution  Date. Shortfalls in
collections of interest as a result of the timing of partial prepayments on  the
Mortgage  Loans will not be so offset. To the extent of any such shortfalls as a
result of partial prepayments  and to the extent  that the aggregate  Prepayment
Interest  Shortfalls with  respect to a  Distribution Date  exceed the aggregate
Servicing Fees relating to mortgagor payments or other recoveries distributed on
such Distribution  Date, the  resulting interest  shortfall (the  "Non-Supported
Interest Shortfall") will be allocated to (i) the Class A Certificates according
to  the Class A  Percentage and (ii)  the Class M  Certificates according to the
percentage obtained by dividing the  then-outstanding Class M Principal  Balance
by  the sum of the then-outstanding Class A Principal Balance, Class M Principal
Balance and Class B Principal Balance. Such allocation of Non-Supported Interest
Shortfalls will reduce the amount of  interest due to be distributed to  holders
of  the  Class  A  Certificates and  Class  M  Certificates,  respectively, then
entitled to distributions  in respect of  interest and, in  the case of  Accrual
Certificates prior to the Accretion Termination Date, will
 
                                      S-23
<PAGE>
reduce  the amount accrued and  added to the Class  A Subclass Principal Balance
thereof. Any such reduction in respect  of interest will be allocated among  the
Subclasses  of Class A  Certificates pro rata  on the basis  of their respective
Class A  Subclass  Interest Accrual  Amounts  for such  Distribution  Date.  See
"Servicing of the Mortgage Loans--Adjustment to Servicing Fee in Connection with
Prepaid and Liquidated Mortgage Loans" in the Prospectus.
 
    The  interest  portion of  any Excess  Special  Hazard Losses,  Excess Fraud
Losses or Excess Bankruptcy Losses will be allocated among the Class A, Class  M
and  Class B Certificates  pro rata based  on the interest  accrued on each such
Class and among the Subclasses of Class A Certificates pro rata on the basis  of
their respective Class A Subclass Interest Accrual Amounts for such Distribution
Date.
 
    Allocations  of the interest  portion of Realized  Losses (other than Excess
Special Hazard Losses, Excess Fraud Losses or Excess Bankruptcy Losses) first to
the Class B Certificates and then to  the Class M Certificates will result  from
the  priority of distributions first to  the Class A Certificateholders and then
to the Class M Certificateholders of  the Pool Distribution Amount as  described
above under "-- Distributions."
 
    On  each Distribution Date  on which the Pool  Distribution Amount equals or
exceeds the sum of the Class A Subclass Interest Accrual Amounts,  distributions
in  respect of interest to each Subclass  of Class A Certificates other than the
Accrual Certificates will equal such Subclass' Class A Subclass Interest Accrual
Amount. On each such Distribution Date, interest in an amount equal to its Class
A Subclass Interest Accrual Amount will accrue on the Accrual Certificates,  but
such  amount will  not be  distributed as  interest to  the Accrual Certificates
until the "Accretion Termination Date."  The Accretion Termination Date will  be
the earlier of (i) the Distribution Date on which the Class A Subclass Principal
Balance  of the  Class A-6 Certificates  has been  reduced to zero  and (ii) the
Cross-Over Date. Prior to  such time, an  amount equal to  the Class A  Subclass
Interest  Accrual Amount for the Accrual Certificates will not be distributed as
interest to  the  holders of  the  Accrual  Certificates, but  will  instead  be
distributed  in  reduction of  the  Class A  Subclass  Principal Balance  of the
Subclass or  Subclasses  of  Class  A  Certificates  then  entitled  to  receive
distributions  in reduction of principal balance as described under "--Principal
(Including Prepayments)" below, and  the Class A  Subclass Principal Balance  of
the Accrual Certificates will be increased by a corresponding amount.
 
    If,  on any Distribution Date, the Pool Distribution Amount is less than the
sum of the  Class A Subclass  Interest Accrual Amounts,  the amount of  interest
currently   distributed  on  the  Class  A  Certificates  will  equal  the  Pool
Distribution Amount  and will  be  allocated among  the  Subclasses of  Class  A
Certificates  pro rata in  accordance with each such  Subclass' Class A Subclass
Interest Accrual Amount. Amounts so allocated will be distributed in respect  of
interest  to each Subclass  of Class A  Certificates, with the  exception of the
Accrual Certificates prior to the Accretion Termination Date. In the case of the
Accrual Certificates  prior  to  the  Accretion  Termination  Date,  amounts  so
allocated will be added to the Class A Subclass Principal Balance of the Accrual
Certificates and distributed as principal to the Subclass or Subclasses of Class
A  Certificates then entitled to receive distributions in reduction of principal
balance. See "--Principal (Including Prepayments)" below. Any difference between
the portion of the  Pool Distribution Amount distributed  in respect of  current
interest to each Subclass of Class A Certificates or, in the case of the Accrual
Certificates  prior to the  Accretion Termination Date, accrued  on and added to
the Class  A  Subclass Principal  Balance  thereof,  and the  Class  A  Subclass
Interest  Accrual  Amounts  for  such  Subclass  with  respect  to  the  related
Distribution Date (as to each Subclass, the "Class A Subclass Interest Shortfall
Amount"),  will  be  added  to  the  amount  to  be  distributed  on  subsequent
Distribution Dates to the extent that the Pool Distribution Amount is sufficient
therefor.  No  interest will  accrue  on the  unpaid  Class A  Subclass Interest
Shortfall Amounts.  In the  event that  on any  Distribution Date  prior to  the
Accretion  Termination Date the Pool Distribution Amount is less than the sum of
the Class A  Subclass Interest Accrual  Amounts, resulting in  Class A  Subclass
Interest  Shortfall Amounts, as described above,  an amount equal to the Accrual
Distribution Amount would be distributed to the Subclass or Subclasses of  Class
A   Certificates  then  entitled  to   receive  distributions  in  reduction  of
 
                                      S-24
<PAGE>
principal balance,  notwithstanding  that the  holders  of Certificates  of  the
Subclasses then entitled to receive distributions of interest have received less
than  their respective Class A Subclass Interest Accrual Amounts with respect to
such Distribution Date.
 
    On each Distribution Date on which the Pool Distribution Amount exceeds  the
sum  of the Class A  Subclass Interest Accrual Amounts,  any excess will then be
allocated first to  pay previously  unpaid Class A  Subclass Interest  Shortfall
Amounts.  Such  amounts  will  be  allocated among  the  Subclasses  of  Class A
Certificates pro rata in accordance with the respective unpaid Class A  Subclass
Interest Shortfall Amounts immediately prior to such Distribution Date. Prior to
the  Accretion  Termination  Date,  the  amount  so  allocated  to  the  Accrual
Certificates will not be distributed as  interest to the holders of the  Accrual
Certificates,  but  will instead  be  distributed in  reduction  of the  Class A
Subclass Principal Balance of the Subclass or Subclasses of Class A Certificates
then entitled to receive  distributions in reduction  of principal balance,  and
the  Class  A Subclass  Principal Balance  of the  Accrual Certificates  will be
increased by a corresponding amount.
 
    On each Distribution Date  on which the Pool  Distribution Amount equals  or
exceeds  the sum  of (i) the  Class A Distribution  Amount and (ii)  the Class M
Interest Accrual Amount,  distributions in  respect of current  interest to  the
Class M Certificates will equal the Class M Interest Accrual Amount.
 
    If,  on any Distribution Date, the Pool Distribution Amount is less than the
sum of (i) the Class A Distribution Amount and (ii) the Class M Interest Accrual
Amount, the amount of current interest  distributed on the Class M  Certificates
will  equal the  Pool Distribution Amount  minus the amounts  distributed to the
Class A  Certificates with  respect to  such Distribution  Date. Any  difference
between  the portion of  the Pool Distribution Amount  distributed in respect of
current interest to the  Class M Certificates and  the Class M Interest  Accrual
Amount  with respect to such Distribution  Date (the "Class M Interest Shortfall
Amount"),  will  be  added  to  the  amount  to  be  distributed  on  subsequent
Distribution Dates to the extent that the Pool Distribution Amount is sufficient
therefor.  No  interest will  accrue on  the unpaid  Class M  Interest Shortfall
Amount.
 
    On each Distribution Date on which the Pool Distribution Amount exceeds  the
sum  of the Class A Distribution Amount and the Class M Interest Accrual Amount,
any excess will  be allocated first  to pay previously  unpaid Class M  Interest
Shortfall  Amounts and then to make distributions in respect of principal on the
Class M  Certificates and  in respect  of  interest and  then principal  on  the
subclasses of Class B Certificates.
 
    On  any Distribution Date on which the Pool Distribution Amount is less than
the Class A Distribution Amount, the Class M Certificates and the subclasses  of
Class  B Certificates will not  be entitled to any  distributions of interest or
principal.
 
PRINCIPAL (INCLUDING PREPAYMENTS)
 
    The principal balance of  a Class A  Certificate of any  Subclass or of  any
Class  M Certificate at any time is equal to the product of the Class A Subclass
Principal Balance of such Subclass or the Class M Principal Balance, as the case
may be, and such Certificate's  Percentage Interest, and represents the  maximum
specified  dollar amount (exclusive of (i) any  interest that may accrue on such
Class A Certificate (other than interest added to the Class A Subclass Principal
Balance of the Accrual Certificates) or Class M Certificate and (ii) in the case
of the Class A-R Certificate,  any additional amounts to  which a holder of  the
Class  A-R Certificate  may be entitled  as described  below under "--Additional
Rights of  the Class  A-R Certificateholder")  to which  the holder  thereof  is
entitled from the cash flow on the Mortgage Loans at such time, and will decline
to  the extent of  distributions in reduction  of the principal  balance of, and
allocations of  losses to,  such Certificate.  The approximate  initial Class  A
Subclass  Principal Balance  of each  Subclass of  Offered Certificates  and the
approximate initial Class M Principal Balance are set forth on the cover of this
Prospectus Supplement. The  initial Class  A Subclass Principal  Balance of  the
Class A-10 Certificates is $1,000.
 
                                      S-25
<PAGE>
  CALCULATION OF AMOUNT TO BE DISTRIBUTED TO THE CLASS A CERTIFICATES
 
    Distributions  in  reduction  of  the  principal  balance  of  the  Class  A
Certificates will be made on each Distribution Date in an aggregate amount equal
to  the  Class  A  Principal   Distribution  Amount.  The  "Class  A   Principal
Distribution  Amount" with respect to any Distribution Date will be equal to the
sum of  (i)  the Accrual  Distribution  Amount, if  any,  with respect  to  such
Distribution  Date and (ii)  the Class A  Principal Amount with  respect to such
Distribution Date.  The  "Accrual  Distribution  Amount"  with  respect  to  any
Distribution  Date will  be equal  to the  sum of  (i) the  portion, if  any, of
current interest allocated but  not distributed to  the Accrual Certificates  on
such   Distribution  Date  in  accordance  with   priority  FIRST  of  the  Pool
Distribution Amount Allocation and (ii) the portion, if any, of the unpaid Class
A Interest  Shortfall  Amount  allocated  but not  distributed  to  the  Accrual
Certificates on such Distribution Date in accordance with priority SECOND of the
Pool Distribution Amount Allocation. The "Class A Principal Amount" with respect
to  any Distribution Date  will be equal  to the amount  distributed pursuant to
priority THIRD  of the  Pool  Distribution Amount  Allocation, in  an  aggregate
amount up to the Class A Optimal Principal Amount.
 
    The  "Class A  Optimal Principal Amount"  with respect  to each Distribution
Date will be an amount equal to the sum of (i) the Class A Percentage of (A) all
scheduled payments of principal due on each outstanding Mortgage Loan (including
each defaulted Mortgage  Loan, other  than a  Liquidated Loan,  with respect  to
which  the related Mortgaged Property has been  acquired by the Trust Estate) on
the first day of the  month in which the Distribution  Date occurs, less (B)  if
the  Bankruptcy Coverage Termination Date has occurred, the principal portion of
Debt Service Reductions, (ii) the Class A Prepayment Percentage of the Scheduled
Principal Balance of each  Mortgage Loan which, during  the month preceding  the
month  of such  Distribution Date  was repurchased  by the  Seller, as described
under the heading "The Trust  Estates--Mortgage Loans" in the Prospectus,  (iii)
the  Class A Prepayment Percentage of  the aggregate net Liquidation Proceeds on
all Mortgage Loans that became Liquidated  Loans (except for the Mortgage  Loans
covered  by clause (v) below) during such preceding month (excluding the portion
thereof, if  any,  constituting  Net  Foreclosure  Profits),  less  the  amounts
allocable  to principal of any unreimbursed Periodic Advances previously made by
the Servicer with respect to  such Liquidated Loans and  the portion of the  net
Liquidation  Proceeds  allocable  to  interest,  (iv)  the  Class  A  Prepayment
Percentage of an amount equal to the principal portion of Realized Losses (other
than Bankruptcy  Losses  due  to  Debt  Service  Reductions)  incurred  in  such
preceding month other than Excess Special Hazard Losses, Excess Fraud Losses and
Excess  Bankruptcy Losses,  (v) if  the Special  Hazard Termination  Date or the
Fraud Coverage Termination  Date has  occurred, the  Class A  Percentage of  the
aggregate  net  Liquidation Proceeds  on all  Liquidated  Loans that  suffered a
Special Hazard Loss or a Fraud Loss,  as the case may be, during such  preceding
month  (excluding  the portion  thereof,  if any,  constituting  Net Foreclosure
Profits), less the amounts allocable  to principal of any unreimbursed  Periodic
Advances  previously made by the Servicer  with respect to such Liquidated Loans
and the portion of such net Liquidation Proceeds allocable to interest, (vi) the
Class A  Prepayment  Percentage  of  the Scheduled  Principal  Balance  of  each
Mortgage Loan which was the subject of a principal prepayment in full during the
month  preceding  the  month  of  such  Distribution  Date,  (vii)  the  Class A
Prepayment Percentage  of  all  partial principal  prepayments  applied  by  the
Servicer in reduction of the unpaid principal balance of any Mortgage Loan on or
after the Determination Date occurring in the month preceding the month in which
such  Distribution Date occurs and prior  to the Determination Date occurring in
the month  in  which  such Distribution  Date  occurs  and (viii)  the  Class  A
Percentage  of  the  difference  between the  unpaid  principal  balance  of any
Mortgage Loan  substituted  for  a  defective Mortgage  Loan  during  the  month
preceding  the  month in  which  such Distribution  Date  occurs and  the unpaid
principal balance of such defective Mortgage Loan, less the amounts allocable to
principal of any unreimbursed Periodic  Advances with respect to such  defective
Mortgage  Loan. See  "The Trust Estates--Mortgage  Loans--Assignment of Mortgage
Loans to the Trustee" in the Prospectus. In addition, in the event that there is
any recovery of  an amount  in respect of  principal which  had previously  been
allocated  as a Realized Loss to the  Class A Certificates, each Subclass of the
Class A Certificates then outstanding will be entitled to its pro rata share  of
such  recovery in an  amount up to  the amount of  such Realized Loss previously
allocated to such Subclass.
 
                                      S-26
<PAGE>
    The "Scheduled Principal Balance" of a Mortgage Loan as of any  Distribution
Date  is the unpaid principal balance of  such Mortgage Loan as specified in the
amortization schedule at  the time  relating thereto (before  any adjustment  to
such  schedule  by  reason  of  bankruptcy,  other  than  Deficient  Valuations,
moratorium or similar waiver or  grace period) as of  the Due Date occurring  in
the  month preceding  the month  in which  such Distribution  Date occurs, after
giving effect to any  principal prepayments or  other unscheduled recoveries  of
principal previously received, to any partial prepayments applied as of such Due
Date, Deficient Valuations occuring prior to such Due Date and to the payment of
principal  due on such Due Date, and  irrespective of any delinquency in payment
by the mortgagor.
 
    A "Liquidated Loan" is  a defaulted Mortgage Loan  as to which the  Servicer
has determined that all recoverable liquidation and insurance proceeds have been
received.  A "Liquidated Loan Loss" on a Liquidated Loan is equal to the excess,
if any,  of (i)  the unpaid  principal  balance of  such Liquidated  Loan,  plus
interest  thereon in accordance  with the amortization  schedule at the mortgage
interest rate through the last day of the month in which such Mortgage Loan  was
liquidated,  over (ii) net Liquidation Proceeds. For purposes of calculating the
amount of  any  Liquidated  Loan  Loss,  all  net  Liquidation  Proceeds  (after
reimbursement  to the Servicer for any  previously unreimbursed advance) will be
applied first to accrued  interest and then to  the unpaid principal balance  of
the Liquidated Loan. A "Special Hazard Loss" is a Liquidated Loan Loss occurring
as  a result of a  hazard not insured against  under a standard hazard insurance
policy  of   the   type  described   in   the  Prospectus   under   "The   Trust
Estates--Mortgage  Loans-- Insurance Policies".  A "Fraud Loss"  is a Liquidated
Loan Loss incurred  on a  Liquidated Loan  as to which  there was  fraud in  the
origination of such Mortgage Loan. A "Bankruptcy Loss" is a loss attributable to
certain  actions which may be  taken by a bankruptcy  court in connection with a
Mortgage Loan, including  a reduction  by a  bankruptcy court  of the  principal
balance  of or  the interest  rate on  a Mortgage  Loan or  an extension  of its
maturity. A "Debt Service Reduction" means a reduction in the amount of  monthly
payments  due  to  certain  bankruptcy proceedings,  but  does  not  include any
permanent forgiveness of principal.  A "Deficient Valuation"  with respect to  a
Mortgage  Loan means  a valuation  by a  court of  the Mortgaged  Property in an
amount less than  the outstanding indebtedness  under the Mortgage  Loan or  any
reduction  in  the  amount  of  monthly payments  that  results  in  a permanent
forgiveness of principal, which valuation or reduction results from a bankruptcy
proceeding. Liquidated Loan  Losses (including Special  Hazard Losses and  Fraud
Losses) and Bankruptcy Losses are referred to herein as "Realized Losses."
 
    The  "Class A Percentage"  for any Distribution Date  occurring prior to the
Cross-Over Date is the percentage (subject to rounding), which in no event  will
exceed  100%, obtained by dividing the Class A Principal Balance as of such date
(before taking into account distributions  in reduction of principal balance  on
such  date) by the aggregate Scheduled  Principal Balances of all Mortgage Loans
for such Distribution Date (the "Pool Scheduled Principal Balance"). The Class A
Percentage for the  first Distribution  Date will be  approximately 94.50%.  The
Class  A  Percentage will  decrease as  a  result of  the allocation  of certain
unscheduled  payments  in  respect  of  principal  at  the  Class  A  Prepayment
Percentage  for a specified period to the Class A Certificates and will increase
as a result of the allocation of Realized Losses to the Class B and the Class  M
Certificates.  The Class A Percentage for each Distribution Date occurring on or
after the Cross-Over Date will be 100%.
 
    The "Class  A Prepayment  Percentage" for  any Distribution  Date  occurring
during  the five years beginning on the  first Distribution Date will, except as
provided below, equal 100%. Thereafter,  the Class A Prepayment Percentage  will
be  subject to gradual  reduction as described in  the following paragraph. This
disproportionate allocation  of  certain  unscheduled  payments  in  respect  of
principal  will have the effect of accelerating  the amortization of the Class A
Certificates while, in the absence of Realized Losses, increasing the respective
interest in the principal balance of the Mortgage Loans evidenced by the Class M
and Class B Certificates. Increasing the respective interest of the Class M  and
Class B Certificates relative to that of the Class A Certificates is intended to
preserve the availability of the subordination provided by the Class M and Class
B Certificates. See "--Subordination of Class M and Class B Certificates" below.
 
                                      S-27
<PAGE>
    The  Class A Prepayment Percentage for any Distribution Date occurring on or
after the fifth anniversary of the  first Distribution Date will be as  follows:
for  any  Distribution  Date  subsequent  to  May  1997  to  and  including  the
Distribution Date in May 1998, the Class A Percentage for such Distribution Date
plus 70% of  the Subordinated  Percentage for  such Distribution  Date; for  any
Distribution  Date subsequent to May 1998 to and including the Distribution Date
in May 1999, the Class A Percentage  for such Distribution Date plus 60% of  the
Subordinated  Percentage for such  Distribution Date; for  any Distribution Date
subsequent to May 1999 to and including  the Distribution Date in May 2000,  the
Class  A  Percentage for  such Distribution  Date plus  40% of  the Subordinated
Percentage for such Distribution Date;  for any Distribution Date subsequent  to
May  2000  to and  including  the Distribution  Date in  May  2001, the  Class A
Percentage for such Distribution  Date plus 20%  of the Subordinated  Percentage
for  such Distribution Date; and for any Distribution Date thereafter, the Class
A Percentage  for  such  Distribution  Date (unless  on  any  of  the  foregoing
Distribution   Dates  the  Class  A  Percentage  exceeds  the  initial  Class  A
Percentage,  in  which  case  the   Class  A  Prepayment  Percentage  for   such
Distribution  Date  will  once  again equal  100%).  See  "Prepayment  and Yield
Considerations" herein and in the Prospectus. Notwithstanding the foregoing,  no
reduction of the Class A Prepayment Percentage will occur if (i) as of the first
Distribution  Date as to which any such  reduction applies, more than an average
of 2% of the dollar amount of all monthly payments on the Mortgage Loans due  in
each  of the preceding twelve months were  delinquent 60 days or more (including
for this  purpose any  Mortgage Loans  in foreclosure  and Mortgage  Loans  with
respect  to which the related Mortgaged Property  has been acquired by the Trust
Estate), or (ii) Realized Losses with  respect to the Mortgage Loans exceed  (a)
with respect to the Distribution Date in June 1997, 30% of the principal balance
of  the  Subordinated  Certificates  as  of  the  Cut-Off  Date  (the  "Original
Subordinated Principal Balance"), (b) with  respect to the Distribution Date  in
June  1998, 35% of the Original Subordinated Principal Balance, (c) with respect
to the  Distribution  Date  in  June 1999,  40%  of  the  Original  Subordinated
Principal  Balance, (d) with respect to the  Distribution Date in June 2000, 45%
of the Original  Subordinated Principal  Balance, and  (e) with  respect to  the
Distribution  Date  in June  2001, 50%  of  the Original  Subordinated Principal
Balance. The  "Subordinated  Percentage"  for  any  Distribution  Date  will  be
calculated  as the difference between  100% and the Class  A Percentage for such
date. The "Subordinated Prepayment Percentage" for any Distribution Date will be
calculated as the difference between 100% and the Class A Prepayment  Percentage
for  such  date. If  on  any Distribution  Date the  allocation  to the  Class A
Certificates of full and partial principal prepayments and other amounts in  the
percentage required above would reduce the outstanding Class A Principal Balance
below zero, the Class A Prepayment Percentage for such Distribution Date will be
limited  to the percentage necessary to reduce  the Class A Principal Balance to
zero.  See  "Description  of   the  Certificates--Distributions  to   Percentage
Certificateholders--Shifting Interest Certificates" in the Prospectus.
 
  CALCULATION OF AMOUNT TO BE DISTRIBUTED TO THE CLASS M CERTIFICATES
 
    Distributions  in  reduction  of  the  principal  balance  of  the  Class  M
Certificates will be made on each Distribution Date, pursuant to priority  SIXTH
of the Pool Distribution Amount Allocation, in an aggregate amount (the "Class M
Principal Distribution Amount"), up to the Class M Optimal Principal Amount.
 
    The  "Class M  Optimal Principal Amount"  with respect  to each Distribution
Date will be an amount equal to the sum of (i) the Class M Percentage of (A) all
scheduled payments of principal due on each outstanding Mortgage Loan (including
each defaulted Mortgage  Loan, other  than a  Liquidated Loan,  with respect  to
which  the related Mortgaged Property has been  acquired by the Trust Estate) on
the first day of the  month in which the Distribution  Date occurs, less (B)  if
the  Bankruptcy Coverage Termination Date has occurred, the principal portion of
Debt Service Reductions, (ii) the Class M Prepayment Percentage of the Scheduled
Principal Balance of each  Mortgage Loan which, during  the month preceding  the
month  of such  Distribution Date  was repurchased  by the  Seller, as described
under the heading "The Trust  Estates--Mortgage Loans" in the Prospectus,  (iii)
the  Class M Prepayment Percentage of  the aggregate net Liquidation Proceeds on
all Mortgage Loans that became Liquidated  Loans (except for the Mortgage  Loans
covered  by clause (v) below) during such preceding month (excluding the portion
thereof,  if  any  constituting  Net  Foreclosure  Profits,  as  defined   under
"--Additional  Rights  of  the  Class A-R  Certificateholder"  below),  less the
amounts allocable to principal of any unreimbursed
 
                                      S-28
<PAGE>
Periodic  Advances  previously  made  by  the  Servicer  with  respect  to  such
Liquidated  Loans and the  portion of the net  Liquidation Proceeds allocable to
Interest, (iv) on each Distribution Date prior  to the reduction of the Class  B
Principal  Balance to zero, the Class M Prepayment Percentage of an amount equal
to the principal portion of Realized Losses (other than Bankruptcy Losses due to
Debt Service  Reductions) incurred  in such  preceding month  other than  Excess
Special  Hazard Losses, Excess Fraud Losses and Excess Bankruptcy Losses, (v) if
the Special Hazard Termination Date or  the Fraud Coverage Termination Date  has
occurred,  the Class M  Percentage of the aggregate  net Liquidation Proceeds on
all Liquidated Loans that suffered a Special  Hazard Loss or Fraud Loss, as  the
case may be, during such preceding month (excluding the portion thereof, if any,
constituting  Net Foreclosure Profits), less  the amounts allocable to principal
of any  unreimbursed Periodic  Advances  previously made  by the  Servicer  with
respect  to  such  Liquidated Loans  and  the  portion of  such  net Liquidation
Proceeds allocable to interest,  (vi) the Class M  Prepayment Percentage of  the
Scheduled  Principal Balance of  each Mortgage Loan  which was the  subject of a
principal prepayment  in full  during  the month  preceding  the month  of  such
Distribution  Date,  (vii)  the Class  M  Prepayment Percentage  of  all partial
principal prepayments  applied  by  the  Servicer in  reduction  of  the  unpaid
principal  balance  of any  Mortgage  Loan on  or  after the  Determination Date
occurring in  the month  preceding the  month in  which such  Distribution  Date
occurs  and prior to the Determination Date occurring in the month in which such
Distribution Date occurs  and (viii) the  Class M Percentage  of the  difference
between  the unpaid  principal balance  of any  Mortgage Loan  substituted for a
defective Mortgage  Loan during  the month  preceding the  month in  which  such
Distribution  Date occurs  and the  unpaid principal  balance of  such defective
Mortgage Loan,  less the  amounts  allocable to  principal of  any  unreimbursed
Periodic  Advances with respect to such  defective Mortgage Loan. See "The Trust
Estates--Mortgage Loans--Assignment of  Mortgage Loans  to the  Trustee" in  the
Prospectus. In addition, in the event that there is any recovery of an amount in
respect  of principal which had previously been  allocated as a Realized Loss to
the Class M Certificates, the Class M Certificates will be entitled to their pro
rata share of such recovery  up to the amount  of such Realized Loss  previously
allocated to such Class.
 
    The  "Class  M  Percentage"  and "Class  M  Prepayment  Percentage"  for any
Distribution Date will  equal that  portion of the  Subordinated Percentage  and
Subordinated  Prepayment  Percentage, as  the case  may  be, represented  by the
fraction the  numerator  of which  is  the then-outstanding  Class  M  Principal
Balance and the denominator of which is the sum of the Class M Principal Balance
and  the  Class B  Subclass  Principal Balances  of  the subclasses  entitled to
principal  distributions  for  such  Distribution  Date  as  described  in   the
succeeding paragraph.
 
    In   the  event  that  on  any   Distribution  Date,  the  Current  Class  M
Subordination Level is less than the  Original Class M Subordination Level,  the
Class  B-1, Class B-2, Class B-3 and Class B-4 Certificates will not be entitled
to distributions in  respect of  principal and  the Class  B Subclass  Principal
Balances of such subclasses will not be used to determine the Class M Percentage
and  Class  M  Prepayment  Percentage  for  such  Distribution  Date.  For  such
Distribution Date, the Class M Percentage and Class M Prepayment Percentage will
equal the Subordinated  Percentage and the  Subordinated Prepayment  Percentage,
respectively.  In the event that the  Current Class M Subordination Level equals
or exceeds the Original  Class M Subordination Level  but the Current Class  B-1
Subordination Level is less than the Original Class B-1 Subordination Level, the
Class  B-2,  Class  B-3 and  Class  B-4  Certificates will  not  be  entitled to
distributions in  respect  of  principal  and the  Class  B  Subclass  Principal
Balances of such subclasses will not be used to determine the Class M Percentage
and  the Class M Prepayment Percentage for  such Distribution Date. In the event
that each of the Current Class M  Subordination Level and the Current Class  B-1
Subordination Level equal or exceed the Original Class M Subordination Level and
the  Original Class B-1 Subordination Level, respectively, but the Current Class
B-2 Subordination Level is less than the Original Class B-2 Subordination Level,
the Class B-3 and Class B-4  Certificates will not be entitled to  distributions
in  respect of  principal and  the Class B  Subclass Principal  Balances of such
subclasses will not be used to determine the Class M Percentage and the Class  M
Prepayment  Percentage for such Distribution Date. In the event that each of the
Current Class M Subordination Level,  the Current Class B-1 Subordination  Level
and the Current Class B-2 Subordination Level equal or exceed the Original Class
M  Subordination  Level,  the Original  Class  B-1 Subordination  Level  and the
 
                                      S-29
<PAGE>
Original Class B-2 Subordination Level, respectively, but the Current Class  B-3
Subordination Level is less than the Original Class B-3 Subordination Level, the
Class  B-4  Certificates will  not be  entitled to  distributions in  respect of
principal and the Class B Subclass  Principal Balance of such subclass will  not
be  used  to  determine  the  Class M  Percentage  and  the  Class  M Prepayment
Percentage for such Distribution Date. The Class B-4 Certificates will not  have
original  or current subordination levels which are required to be maintained as
described above.
 
    The "Original Class  M Subordination  Level" is the  percentage obtained  by
dividing the sum of the initial Class B Subclass Principal Balances of the Class
B-1,  Class  B-2, Class  B-3  and Class  B-4  Certificates by  the  Cut-Off Date
Aggregate Principal  Balance  of  the  Mortgage  Loans.  The  Original  Class  M
Subordination  Level is expected to be approximately 3.75%. The "Current Class M
Subordination Level" for  any Distribution  Date is the  percentage obtained  by
dividing  the sum of the then-outstanding Class B Subclass Principal Balances of
the Class B-1, Class B-2, Class B-3 and Class B-4 Certificates by the sum of the
Class A  Principal  Balance, the  Class  M Principal  Balance  and the  Class  B
Principal Balance.
 
    The  "Original Class B-1 Subordination Level"  is the percentage obtained by
dividing the sum of the initial Class B Subclass Principal Balances of the Class
B-2, Class  B-3  and  Class  B-4 Certificates  by  the  Cut-Off  Date  Aggregate
Principal  Balance of the  Mortgage Loans. The  Original Class B-1 Subordination
Level  is  expected  to   be  approximately  2.50%.   The  "Current  Class   B-1
Subordination  Level" for  any Distribution Date  is the  percentage obtained by
dividing the sum of the then-outstanding Class B Subclass Principal Balances  of
the  Class B-2, Class B-3 and  Class B-4 Certificates by the  sum of the Class A
Principal Balance,  the Class  M Principal  Balance and  the Class  B  Principal
Balance.
 
    The  "Original Class B-2 Subordination Level"  is the percentage obtained by
dividing the sum of the initial Class B Subclass Principal Balances of the Class
B-3 and Class B-4 Certificates by  the Cut-Off Date Aggregate Principal  Balance
of the Mortgage Loans. The Original Class B-2 Subordination Level is expected to
be  approximately 1.75%.  The "Current  Class B-2  Subordination Level"  for any
Distribution Date  is  the  percentage  obtained by  dividing  the  sum  of  the
then-outstanding  Class B Subclass Principal Balances of the Class B-3 and Class
B-4 Certificates  by the  sum of  the Class  A Principal  Balance, the  Class  M
Principal Balance and the Class B Principal Balance.
 
    The  "Original Class B-3 Subordination Level"  is the percentage obtained by
dividing the sum of the initial Class B Subclass Principal Balance of the  Class
B-4 Certificates by the Cut-Off Date Aggregate Principal Balance of the Mortgage
Loans.   The  Original  Class   B-3  Subordination  Level   is  expected  to  be
approximately 0.50%.  The  "Current  Class  B-3  Subordination  Level"  for  any
Distribution  Date  is  the  percentage  obtained by  dividing  the  sum  of the
then-outstanding  Class  B   Subclass  Principal  Balance   of  the  Class   B-4
Certificates  by the sum of the Class A Principal Balance, the Class M Principal
Balance and the Class B Principal Balance.
 
  ALLOCATION OF AMOUNT TO BE DISTRIBUTED TO THE CLASS A AND CLASS M CERTIFICATES
 
    On each Distribution Date occurring prior to the Cross-Over Date the Class A
Principal Distribution  Amount  will  be  allocated  among  and  distributed  in
reduction of the principal balances of the Subclasses of Class A Certificates as
follows:
 
        FIRST,  sequentially, to the Class A-1, Class A-2, Class A-3, Class A-4,
    Class A-5, Class A-6 and Class A-7 Certificates, up to their respective  PAC
    Principal Amounts with respect to such Distribution Date;
 
        SECOND, sequentially, to the Class A-8 and Class A-9 Certificates, until
    the  Class  A Subclass  Principal  Balance of  each  such Subclass  has been
    reduced to zero;
 
        THIRD, concurrently, to the  Class A-10 Certificates  and the Class  A-R
    Certificate, pro rata, until the Class A Subclass Principal Balances thereof
    have been reduced to zero; and
 
        FOURTH, sequentially, to the Class A-1, Class A-2, Class A-3, Class A-4,
    Class  A-5, Class  A-6 and  Class A-7  Certficates, without  regard to their
    respective PAC  Principal  Amounts  until the  Class  A  Subclass  Principal
    Balance of each such Subclass has been reduced to zero.
 
                                      S-30
<PAGE>
    As  used above, the "PAC Principal Amount" for any Distribution Date and for
any Subclass of PAC Certificates means the amount, if any, that would reduce the
Class A Subclass  Principal Balance of  such Subclass to  the percentage of  its
initial  Class A Subclass  Principal Balance shown in  the following tables with
respect to such Distribution Date.
 
    On each Distribution  Date occurring on  or after the  Cross-Over Date,  the
Class  A Principal Distribution Amount will  be distributed among the Subclasses
of Class A Certificates pro rata in accordance with their respective outstanding
Class A Subclass Principal Balances.
 
    Amounts distributed on  each Distribution  Date to  the holders  of Class  A
Certificates  in  reduction of  principal balance  will  be allocated  among the
holders of Class  A Certificates of  each Subclass pro  rata in accordance  with
their respective Percentage Interests.
 
    Amounts  distributed  on any  Distribution Date  to the  holders of  Class M
Certificates in  reduction of  principal  balance will  be allocated  among  the
holders  of Class  M Certificates pro  rata in accordance  with their respective
Percentage Interests.
 
    The following tables set forth for each Distribution Date the planned  Class
A Subclass Principal Balance for each Subclass of PAC Certificates, expressed as
a percentage of the initial Class A Subclass Principal Balance of such Subclass.
 
                                      S-31
<PAGE>
                  PLANNED CLASS A SUBCLASS PRINCIPAL BALANCES
         AS PERCENTAGES OF INITIAL CLASS A SUBCLASS PRINCIPAL BALANCES
 
                             CLASS A-1 CERTIFICATES
<TABLE>
<CAPTION>
                  PERCENTAGE OF
                 INITIAL CLASS A
 DISTRIBUTION       SUBCLASS
     DATE       PRINCIPAL BALANCE
- --------------  -----------------
<S>             <C>
June 1992           97.725047%
July 1992           95.315408
August 1992         92.772057
September 1992      90.096051
October 1992        87.288530
November 1992       84.350712
December 1992       81.283897
January 1993        78.089464
February 1993       74.768868
March 1993          71.323645
 
<CAPTION>
                  PERCENTAGE OF
                 INITIAL CLASS A
 DISTRIBUTION       SUBCLASS
     DATE       PRINCIPAL BALANCE
- --------------  -----------------
<S>             <C>
April 1993          67.755404%
May 1993            64.065830
June 1993           60.256682
July 1993           56.329791
August 1993         52.287057
September 1993      48.130454
October 1993        43.862018
November 1993       39.483857
December 1993       34.998152
<CAPTION>
                  PERCENTAGE OF
                 INITIAL CLASS A
 DISTRIBUTION       SUBCLASS
     DATE       PRINCIPAL BALANCE
- --------------  -----------------
<S>             <C>
January 1994        30.407136%
February 1994       25.713364
March 1994          20.919689
April 1994          16.028710
May 1994            11.042954
June 1994            5.966575
July 1994            0.803304
August 1994
  and
thereafter           0.000000
</TABLE>
 
                             CLASS A-2 CERTIFICATES
<TABLE>
<CAPTION>
                  PERCENTAGE OF
                 INITIAL CLASS A
 DISTRIBUTION       SUBCLASS
     DATE       PRINCIPAL BALANCE
- --------------  -----------------
<S>             <C>
Up to
and including
July 1994          100.000000%
August 1994         86.635467
 
<CAPTION>
                  PERCENTAGE OF
                 INITIAL CLASS A
 DISTRIBUTION       SUBCLASS
     DATE       PRINCIPAL BALANCE
- --------------  -----------------
<S>             <C>
September 1994      70.650259%
October 1994        54.578899
November 1994       38.578477
December 1994       22.659551
<CAPTION>
                  PERCENTAGE OF
                 INITIAL CLASS A
 DISTRIBUTION       SUBCLASS
     DATE       PRINCIPAL BALANCE
- --------------  -----------------
<S>             <C>
January 1995         6.821646%
February 1995
  and
thereafter           0.000000
</TABLE>
 
                             CLASS A-3 CERTIFICATES
<TABLE>
<CAPTION>
                  PERCENTAGE OF
                 INITIAL CLASS A
 DISTRIBUTION       SUBCLASS
     DATE       PRINCIPAL BALANCE
- --------------  -----------------
<S>             <C>
Up to
and including
January 1995       100.000000%
February 1995       96.708384
March 1995          90.933401
April 1995          85.187744
May 1995            79.471241
June 1995           73.783723
 
<CAPTION>
                  PERCENTAGE OF
                 INITIAL CLASS A
 DISTRIBUTION       SUBCLASS
     DATE       PRINCIPAL BALANCE
- --------------  -----------------
<S>             <C>
July 1995           68.125019%
August 1995         62.494962
September 1995      56.893385
October 1995        51.320121
November 1995       45.775004
December 1995       40.257870
January 1996        34.768555
February 1996       29.306898
<CAPTION>
                  PERCENTAGE OF
                 INITIAL CLASS A
 DISTRIBUTION       SUBCLASS
     DATE       PRINCIPAL BALANCE
- --------------  -----------------
<S>             <C>
March 1996          23.872735%
April 1996          18.465906
May 1996            13.086252
June 1996            7.733614
July 1996            2.407832
August 1996
  and
thereafter           0.000000
</TABLE>
 
                                      S-32
<PAGE>
                  PLANNED CLASS A SUBCLASS PRINCIPAL BALANCES
         AS PERCENTAGES OF INITIAL CLASS A SUBCLASS PRINCIPAL BALANCES
 
                             CLASS A-4 CERTIFICATES
<TABLE>
<CAPTION>
                  PERCENTAGE OF
                 INITIAL CLASS A
 DISTRIBUTION       SUBCLASS
     DATE       PRINCIPAL BALANCE
- --------------  -----------------
<S>             <C>
Up to
and including
July 1996          100.000000%
August 1996         90.399747
 
<CAPTION>
                  PERCENTAGE OF
                 INITIAL CLASS A
 DISTRIBUTION       SUBCLASS
     DATE       PRINCIPAL BALANCE
- --------------  -----------------
<S>             <C>
September 1996      72.892542%
October 1996        55.472958
November 1996       38.140483
December 1996       20.894606
<CAPTION>
                  PERCENTAGE OF
                 INITIAL CLASS A
 DISTRIBUTION       SUBCLASS
     DATE       PRINCIPAL BALANCE
- --------------  -----------------
<S>             <C>
January 1997         3.734821%
February 1997
  and
thereafter           0.000000
</TABLE>
 
                             CLASS A-5 CERTIFICATES
<TABLE>
<CAPTION>
                  PERCENTAGE OF
                 INITIAL CLASS A
 DISTRIBUTION       SUBCLASS
     DATE       PRINCIPAL BALANCE
- --------------  -----------------
<S>             <C>
Up to
and including
January 1997       100.000000%
February 1997       96.388043
March 1997          91.787832
April 1997          87.210525
May 1997            82.655988
June 1997           78.173412
July 1997           73.712711
August 1997         69.273750
 
<CAPTION>
                  PERCENTAGE OF
                 INITIAL CLASS A
 DISTRIBUTION       SUBCLASS
     DATE       PRINCIPAL BALANCE
- --------------  -----------------
<S>             <C>
September 1997      64.856393%
October 1997        60.460506
November 1997       56.085954
December 1997       51.732604
January 1998        47.400323
February 1998       43.117650
March 1998          38.930381
April 1998          34.836443
May 1998            30.833806
June 1998           26.969414
<CAPTION>
                  PERCENTAGE OF
                 INITIAL CLASS A
 DISTRIBUTION       SUBCLASS
     DATE       PRINCIPAL BALANCE
- --------------  -----------------
<S>             <C>
July 1998           23.191094%
August 1998         19.496953
September 1998      15.885134
October 1998        12.353819
November 1998        8.901228
December 1998        5.525616
January 1999         2.225275
February 1999
  and
thereafter           0.000000
</TABLE>
 
                             CLASS A-6 CERTIFICATES
<TABLE>
<CAPTION>
                  PERCENTAGE OF
                 INITIAL CLASS A
 DISTRIBUTION       SUBCLASS
     DATE       PRINCIPAL BALANCE
- --------------  -----------------
<S>             <C>
Up to
and including
January 1999       100.000000%
February 1999       98.490296
March 1999          93.734489
April 1999          89.084740
May 1999            84.538679
June 1999           80.217508
July 1999           75.991161
August 1999         71.857832
September 1999      67.815046
October 1999        63.860737
 
<CAPTION>
                  PERCENTAGE OF
                 INITIAL CLASS A
 DISTRIBUTION       SUBCLASS
     DATE       PRINCIPAL BALANCE
- --------------  -----------------
<S>             <C>
November 1999       59.992881%
December 1999       56.209495
January 2000        52.508639
February 2000       48.888412
March 2000          45.346953
April 2000          41.882442
May 2000            38.493093
June 2000           35.274250
July 2000           32.122714
August 2000         29.036918
September 2000      26.015330
<CAPTION>
                  PERCENTAGE OF
                 INITIAL CLASS A
 DISTRIBUTION       SUBCLASS
     DATE       PRINCIPAL BALANCE
- --------------  -----------------
<S>             <C>
October 2000        23.056446%
November 2000       20.158798
December 2000       17.320946
January 2001        14.541481
February 2001       11.819023
March 2001           9.152224
April 2001           6.539759
May 2001             3.980337
June 2001            1.543926
July 2001
  and
thereafter           0.000000
</TABLE>
 
                                      S-33
<PAGE>
                  PLANNED CLASS A SUBCLASS PRINCIPAL BALANCES
         AS PERCENTAGES OF INITIAL CLASS A SUBCLASS PRINCIPAL BALANCES
                             CLASS A-7 CERTIFICATES
 
<TABLE>
<CAPTION>
                  PERCENTAGE OF
                 INITIAL CLASS A
 DISTRIBUTION       SUBCLASS
     DATE       PRINCIPAL BALANCE
- --------------  -----------------
<S>             <C>
June 1992          100.625000%
July 1992          101.253906
August 1992        101.886743
September 1992     102.523535
October 1992       103.164307
November 1992      103.809084
December 1992      104.457891
January 1993       105.110753
February 1993      105.767695
March 1993         106.428743
April 1993         107.093923
May 1993           107.763260
June 1993          108.436780
July 1993          109.114510
August 1993        109.796476
September 1993     110.482704
October 1993       111.173221
November 1993      111.868053
December 1993      112.567229
January 1994       113.270774
February 1994      113.978716
March 1994         114.691083
April 1994         115.407902
May 1994           116.129202
June 1994          116.855009
July 1994          117.585353
August 1994        118.320262
September 1994     119.059763
October 1994       119.803887
November 1994      120.552661
December 1994      121.306115
January 1995       122.064278
February 1995      122.827180
March 1995         123.594850
April 1995         124.367318
May 1995           125.144614
June 1995          125.926767
July 1995          126.713810
August 1995        127.505771
September 1995     128.302682
October 1995       129.104574
November 1995      129.911477
December 1995      130.723424
January 1996       131.540445
 
<CAPTION>
                  PERCENTAGE OF
                 INITIAL CLASS A
 DISTRIBUTION       SUBCLASS
     DATE       PRINCIPAL BALANCE
- --------------  -----------------
<S>             <C>
February 1996      132.362573%
March 1996         133.189839
April 1996         134.022276
May 1996           134.859915
June 1996          135.702790
July 1996          136.550932
August 1996        137.404375
September 1996     138.263153
October 1996       139.127297
November 1996      139.996843
December 1996      140.871823
January 1997       141.752272
February 1997      142.638224
March 1997         143.529713
April 1997         144.426773
May 1997           145.329441
June 1997          146.237750
July 1997          147.151736
August 1997        148.071434
September 1997     148.996880
October 1997       149.928111
November 1997      150.865162
December 1997      151.808069
January 1998       152.756869
February 1998      153.711600
March 1998         154.672297
April 1998         155.638999
May 1998           156.611743
June 1998          157.590566
July 1998          158.575507
August 1998        159.566604
September 1998     160.563895
October 1998       161.567420
November 1998      162.577216
December 1998      163.593324
January 1999       164.615782
February 1999      165.644631
March 1999         166.679910
April 1999         167.721659
May 1999           168.769919
June 1999          169.824731
July 1999          170.886136
August 1999        171.954174
September 1999     173.028888
<CAPTION>
                  PERCENTAGE OF
                 INITIAL CLASS A
 DISTRIBUTION       SUBCLASS
     DATE       PRINCIPAL BALANCE
- --------------  -----------------
<S>             <C>
October 1999       174.110318%
November 1999      175.198508
December 1999      176.293499
January 2000       177.395333
February 2000      178.504054
March 2000         179.619704
April 2000         180.742327
May 2000           181.871967
June 2000          183.008667
July 2000          184.152471
August 2000        185.303424
September 2000     186.461570
October 2000       187.626955
November 2000      188.799623
December 2000      189.979621
January 2001       191.166994
February 2001      192.361787
March 2001         193.564049
April 2001         194.773824
May 2001           195.991160
June 2001          197.216105
July 2001          195.811146
August 2001        189.742025
September 2001     183.818835
October 2001       178.038388
November 2001      172.397562
December 2001      166.893301
January 2002       161.522611
February 2002      156.282561
March 2002         151.170282
April 2002         146.182965
May 2002           141.317857
June 2002          136.572572
July 2002          131.944157
August 2002        127.430031
September 2002     123.027666
October 2002       118.734588
November 2002      114.548373
December 2002      110.466651
January 2003       106.487100
February 2003      102.607446
March 2003          98.825464
April 2003          95.138975
May 2003            91.545847
</TABLE>
 
                                      S-34
<PAGE>
                  PLANNED CLASS A SUBCLASS PRINCIPAL BALANCES
         AS PERCENTAGES OF INITIAL CLASS A SUBCLASS PRINCIPAL BALANCES
                         CLASS A-7 CERTIFICATES (CONTINUED)
<TABLE>
<CAPTION>
                  PERCENTAGE OF
                 INITIAL CLASS A
 DISTRIBUTION       SUBCLASS
     DATE       PRINCIPAL BALANCE
- --------------  -----------------
June 2003           88.043993%
<S>             <C>
July 2003           84.631368
August 2003         81.305971
September 2003      78.065846
October 2003        74.909074
November 2003       71.833779
December 2003       68.838125
January 2004        65.920314
February 2004       63.078586
March 2004          60.311219
April 2004          57.616526
May 2004            54.992858
June 2004           52.438600
July 2004           49.952171
August 2004         47.532024
September 2004      45.176780
 
<CAPTION>
                  PERCENTAGE OF
                 INITIAL CLASS A
 DISTRIBUTION       SUBCLASS
     DATE       PRINCIPAL BALANCE
- --------------  -----------------
<S>             <C>
October 2004        42.884818%
November 2004       40.654688
December 2004       38.484971
January 2005        36.374278
February 2005       34.321250
March 2005          32.324558
April 2005          30.382898
May 2005            28.494998
June 2005           26.659612
July 2005           24.875520
August 2005         23.141528
September 2005      21.456469
October 2005        19.819201
November 2005       18.228605
December 2005       16.683587
<CAPTION>
                  PERCENTAGE OF
                 INITIAL CLASS A
 DISTRIBUTION       SUBCLASS
     DATE       PRINCIPAL BALANCE
- --------------  -----------------
<S>             <C>
January 2006        15.183078%
February 2006       13.726030
March 2006          12.311419
April 2006          10.938243
May 2006             9.605521
June 2006            8.312419
July 2006            7.057869
August 2006          5.843393
September 2006       4.670314
October 2006         3.534817
November 2006        2.434831
December 2006        1.383383
January 2007         0.375338
February 2007
  and
thereafter           0.000000
</TABLE>
 
                                      S-35
<PAGE>
   PRINCIPAL PAYMENT CHARACTERISTICS OF THE PAC CERTIFICATES AND THE COMPANION
CERTIFICATES
 
    The  percentages of the  initial Class A Subclass  Principal Balances of the
PAC Certificates  set  forth in  the  tables  above were  calculated  using  the
assumptions  described in the last full paragraph beginning on page S-56 herein.
Based on  such assumptions,  the  Class A  Subclass  Principal Balance  of  each
Subclass  of PAC Certificates would be reduced  to the percentage of its initial
Class A  Subclass Principal  Balance  indicated in  the  tables above  for  each
Distribution  Date if  prepayments on the  Mortgage Loans occur  at any CONSTANT
rate between approximately 110%  SPA and approximately  350% SPA. The  increased
principal  balances of the Class A-7 Certificates shown, for certain periods, in
the preceding table are  the result of the  interest on such Certificates  being
accrued  and added  thereto as principal  until the  Accretion Termination Date.
However, for the  reasons discussed below,  there can be  no assurance that  the
Class  A Subclass Principal  Balance of any Subclass  of PAC Certificates, after
the application of the distributions to  be made on any Distribution Date,  will
be  equal to  the applicable percentages  of initial Class  A Subclass Principal
Balance for such Distribution Date specified in the tables above.
 
    IT IS HIGHLY  UNLIKELY THAT PRINCIPAL  PAYMENTS ON THE  MORTGAGE LOANS  WILL
OCCUR  AT ANY CONSTANT RATE  OR THAT THE MORTGAGE LOANS  WILL PREPAY AT THE SAME
RATE. In addition, there may be  differences between the characteristics of  the
mortgage  loans ultimately included  in the Trust Estate  and the Mortgage Loans
which are expected to be included, as described herein.
 
    As  discussed  under  "Prepayment  and  Yield  Considerations"  herein,  the
weighted  average  life of  a Subclass  of  Class A  Certificates refers  to the
average amount  of time  that will  elapse from  the date  of issuance  of  such
Subclass  until  each  dollar in  reduction  of  the principal  balance  of such
Subclass is  distributed  to  investors. The  aggregate  amount  distributed  in
reduction  of  the  Class  A Subclass  Principal  Balance,  and  accordingly the
weighted average life, of each Subclass of PAC Certificates will be affected, to
varying degrees, by the  rate of principal  payments (including prepayments)  of
the  Mortgage  Loans, the  timing of  changes in  such rate  of payment  and the
priority sequence of  distributions in  reduction of  principal of  the Class  A
Certificates. The interaction of these factors may have different effects on the
Subclasses  of Class  A Certificates,  including the  PAC Certificates,  and the
effects on any  Subclass may vary  at different  times during the  life of  such
Subclass.  Further,  to the  extent  that the  purchase  prices of  the  Class A
Certificates, including the PAC Certificates, represent discounts or premiums to
their respective initial principal balances, variability in the weighted average
lives of such Certificates could result in variability in the related yields  to
maturity. See "Prepayment and Yield Considerations" herein.
 
    If  prepayments of the  Mortgage Loans occur  at a CONSTANT  rate lower than
approximately 110%  SPA,  the Class  A  Principal Distribution  Amount  on  each
Distribution  Date may  be insufficient  to make  distributions in  reduction of
principal balance of  the PAC Certificates  in amounts that  would reduce  their
principal  balances  to their  respective  planned principal  balances  for such
Distribution Date.  The weighted  average lives  of the  Subclasses of  the  PAC
Certificates  may therefore be extended, as  illustrated by the tables beginning
on page S-58.
 
    If the  Class A  Principal  Distribution Amount  for any  Distribution  Date
exceeds  the sum of the  PAC Principal Amounts for  such Distribution Date, such
excess ("Excess Principal Payments") will  first be distributed sequentially  in
reduction  of principal of the  Class A-8 and Class  A-9 Certificates, until the
Class A Subclass Principal Balances of the Class A-8 and Class A-9  Certificates
have  been reduced to zero and then concurrently to the Class A-10 and Class A-R
Certificates, pro rata,  until the Class  A Subclass Principal  Balances of  the
Class  A-10 and Class A-R Certificates have  been reduced to zero. Therefore, if
prepayments on the  Mortgage Loans were  to occur at  certain constant rates  of
SPA,  the Companion Certificates  and the Class  A-10 Certificates would receive
Excess Principal Payments prior to distribution of any Excess Principal Payments
to the Subclasses  of PAC Certificates.  See the tables  beginning on page  S-58
under "Prepayment and Yield Considerations" herein. This is intended to decrease
the  likelihood that  the PAC Certificates  will be reduced  below their planned
principal balances on such Distribution Date.
 
                                      S-36
<PAGE>
    The extent to which the planned principal balances will be achieved and  the
sensitivity  of a particular Subclass of  PAC Certificates to different rates of
principal payment on the Mortgage Loans will depend, in part, upon the period of
time during which  the Companion  Certificates and the  Class A-10  Certificates
remain  outstanding. Similarly, after  the Companion Certificates  and the Class
A-10 Certificates are no longer outstanding, the rate at which distributions  in
reduction  of principal  of the Subclasses  of PAC Certificates  will occur will
depend, in part,  upon the period  of time  during which the  Subclasses of  PAC
Certificates  having earlier  payment priorities remain  outstanding. Under such
circumstances, Excess Principal Payments will be distributed in reduction of the
Class A  Subclass  Principal  Balances  of the  outstanding  Subclasses  of  PAC
Certificates  in the priorities set forth above under "--Allocation of Amount to
be Distributed to the Class A and Class M Certificates," without regard to their
planned principal balances.
 
    Because any  Excess Principal  Payments for  any Distribution  Date will  be
distributed  to  Certificateholders on  such Distribution  Date, the  ability to
distribute the PAC Principal  Amounts will not be  enhanced by the averaging  of
high  and  low principal  prepayment rates  on the  Mortgage Loans  over several
Distribution Dates, as might be the  case if any such Excess Principal  Payments
were  held  for future  applications and  not distributed  monthly. There  is no
assurance that distributions in reduction of (i) the Class A Subclass  Principal
Balance  of  any  Subclass  of  PAC  Certificates  (other  than  the  Class  A-1
Certificates)  will   not  commence   significantly  earlier   than  the   first
Distribution  Date shown in  the above tables relating  to such Subclasses, (ii)
the Class  A Subclass  Principal Balance  of any  Subclass of  PAC  Certificates
(other  than the Class  A-1 Certificates) will  not commence significantly later
than the first  Distribution Date  shown in the  above tables  relating to  such
Subclasses  or (iii) the Class  A Subclass Principal Balance  of any Subclass of
PAC  Certificates  will  not  be  reduced  to  zero  significantly  earlier   or
significantly later than the last Distribution Dates shown in the above tables.
 
ADDITIONAL RIGHTS OF THE CLASS A-R CERTIFICATEHOLDER
 
    The  Class A-R Certificate will remain outstanding  for as long as the Trust
Estate shall exist,  whether or  not it  is receiving  current distributions  of
principal  or interest. The holder of the Class A-R Certificate will be entitled
to receive the proceeds of the remaining assets of the Trust Estate, if any,  on
the   final  Distribution  Date  for  the  Series  1992-13  Certificates,  after
distributions in  respect of  any  accrued but  unpaid  interest on  the  Series
1992-13  Certificates and after distributions  in reduction of principal balance
have reduced the principal balances of the Series 1992-13 Certificates to  zero.
It  is not  anticipated that  there will  be any  assets remaining  in the Trust
Estate on the final  Distribution Date following  the distributions of  interest
and in reduction of principal balance made on the Series 1992-13 Certificates on
such date.
 
    In  addition,  the  Class A-R  Certificateholder  will be  entitled  on each
Distribution Date to receive  any Pool Distribution  Amount remaining after  all
distributions pursuant to the Pool Distribution Amount Allocation have been made
and  any  Net Foreclosure  Profits after  the Servicer  has been  reimbursed for
unpaid Servicing  Fees. See  "Servicing of  the Mortgage  Loans--Fixed  Retained
Yield,  Servicing Compensation and Payment of  Expenses" in the Prospectus. "Net
Foreclosure Profits" means, with respect  to any Distribution Date, the  excess,
if  any, of (i) the aggregate profits  on Liquidated Loans in the related period
with respect  to which  net  Liquidation Proceeds  exceed the  unpaid  principal
balance thereof plus accrued interest thereon at the Mortgage Interest Rate over
(ii)  the aggregate  realized losses on  Liquidated Loans in  the related period
with respect  to  which  net  Liquidation Proceeds  are  less  than  the  unpaid
principal balance thereof plus accrued interest thereon at the Mortgage Interest
Rate.  It is not anticipated that there will be any such Net Foreclosure Profits
or such undistributed Pool Distribution Amounts.
 
PERIODIC ADVANCES
 
    If, on any Determination Date, payments of principal and interest due on any
Mortgage Loan  in  the Trust  Estate  on the  related  Due Date  have  not  been
received,  the Servicer will  be obligated to  advance on or  before the related
Distribution Date for the benefit of holders of the Series 1992-13  Certificates
an amount in cash equal to all delinquent payments of principal and interest due
on each Mortgage Loan in
 
                                      S-37
<PAGE>
the Trust Estate (with interest adjusted to the applicable Net Mortgage Interest
Rate) not previously advanced, but only to the extent that the Servicer believes
that  such amounts will be recoverable by  it from liquidation proceeds or other
recoveries in respect of the related Mortgage Loan.
 
    The Pooling and Servicing  Agreement provides that any  advance of the  kind
described  in the preceding paragraph  may be reimbursed to  the Servicer at any
time from funds available in the Certificate Account to the extent that (i) such
funds represent receipts on, or  liquidation, insurance, purchase or  repurchase
proceeds  in respect of, the Mortgage Loans to which the advance relates or (ii)
the Servicer has determined in good faith that it will be unable to recover such
advance from funds of the type referred to in clause (i) above.
 
RESTRICTIONS ON TRANSFER OF THE CLASS A-R AND CLASS M CERTIFICATES
 
    The Class A-R Certificate will be  subject to the following restrictions  on
transfer,  and the Class  A-R Certificate will contain  a legend describing such
restrictions.
 
    The Technical  and  Miscellaneous Revenue  Act  of 1988  amended  the  REMIC
provisions  of the Code  to impose a  tax on transfers  of residual interests to
Disqualified Organizations (as  defined in the  Prospectus). These changes  will
apply  to transferors  of the Class  A-R Certificate  as well as  holders of the
Class A-R  Certificate  that  are  Pass-Through  Entities  (as  defined  in  the
Prospectus).  The Pooling and Servicing Agreement  will provide that no legal or
beneficial interest  in the  Class  A-R Certificate  may  be transferred  to  or
registered  in the name of any person unless (i) the proposed purchaser provides
to the  Trustee  an  affidavit to  the  effect  that, among  other  items,  such
transferee  is not a Disqualified Organization,  is not purchasing the Class A-R
Certificate as an  agent for  a Disqualified  Organization (I.E.,  as a  broker,
nominee,  or  other  middleman thereof)  and  is  not an  entity  (a "Book-Entry
Nominee") that  holds REMIC  residual securities  as nominee  to facilitate  the
clearance  and  settlement  of  such  securities  through  electronic book-entry
changes in  accounts  of participating  organizations  and (ii)  the  transferor
states  in writing  to the  Trustee that  it has  no actual  knowledge that such
affidavit is false. Further,  such affidavit requires  the transferee to  affirm
that  it understands that it must take  into account the taxable income relating
to the Class A-R Certificate, that it has no intention to impede the  assessment
or collection of any federal, state or local income taxes legally required to be
paid with respect to the Class A-R Certificate and that it will not transfer the
Class  A-R Certificate to any person or entity that it has reason to believe has
the intention to impede the assessment or collection of such taxes.
 
    In  addition,  the  Class  A-R  Certificate  may  not  be  purchased  by  or
transferred  to any person that  is not a "U.S.  Person," unless (i) such person
holds the Class A-R  Certificate in connection  with the conduct  of a trade  or
business  within the United States and  furnishes the transferor and the Trustee
with an effective  Internal Revenue  Service Form  4224 or  (ii) the  transferee
delivers  to both  the transferor  and the  Trustee an  opinion of  a nationally
recognized tax counsel to  the effect that such  transfer is in accordance  with
the requirements of the Code and the regulations promulgated thereunder and that
such  transfer of the Class A-R Certificate  will not be disregarded for federal
income tax purposes. 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 or trust that is subject  to U.S. federal income tax regardless of
the source of its income.
 
    The Pooling  and Servicing  Agreement  will provide  that any  attempted  or
purported  transfer in violation of these transfer restrictions will be null and
void and will  vest no  rights in any  purported transferee.  Any transferor  or
agent  to whom the Trustee provides information as to any applicable tax imposed
on such transferor or  agent may be  required to bear the  cost of computing  or
providing  such  information.  See "Certain  Federal  Income  Tax Consequences--
Federal Income  Tax Consequences  for REMIC  Certificates--Taxation of  Residual
Certificates--Restrictions   on   Transfer   of   the   Residual   Certificates:
Disqualified  Organizations",  "Restrictions   on  Transfer   of  the   Residual
Certificates:  Non-Economic Residual Interests" and "Restrictions on Transfer of
the Residual Certificates: Foreign Investors" in the Prospectus.
 
                                      S-38
<PAGE>
    The Class A-R Certificate may not be purchased by or transferred to an ERISA
Plan. Because  the  Class  M  Certificates  are  subordinated  to  the  Class  A
Certificates, the Class M Certificates may not be purchased by or transferred to
an  ERISA Plan except  upon the delivery  of an opinion  of counsel as described
herein under "ERISA  Considerations." See "ERISA  Considerations" herein and  in
the Prospectus.
 
REPORTS
 
    In  addition to the applicable information  specified in the Prospectus, the
Servicer will include in the statement delivered to holders of Class A and Class
M Certificates with respect to each Distribution Date the following information:
(i) such distribution allocable  to interest, the  amount of interest  currently
distributable  on the Class A Certificates allocated to each Subclass and to the
Class M Certificates,  any Class  A Subclass Interest  Shortfall Amount  arising
with  respect to each Subclass or any  Class M Interest Shortfall Amount on such
Distribution Date,  any remaining  unpaid Class  A Subclass  Interest  Shortfall
Amount  with respect to each Subclass, or  any remaining unpaid Class M Interest
Shortfall Amount, after giving effect to such distribution and any Non-Supported
Interest Shortfall or the interest portion of Realized Losses allocable to  such
Subclass  or Class with  respect to such  Distribution Date, (ii)  the amount of
such distribution allocable to principal,  (iii) the Class A Principal  Balance,
the  Class M Principal Balance,  the Class A Subclass  Principal Balance of each
Subclass of Class  A Certificates  after giving  effect to  the distribution  of
principal  and  the allocation  of Excess  Special  Hazard Losses,  Excess Fraud
Losses and Excess Bankruptcy Losses, if  any, (iv) the Adjusted Pool Amount  for
such  Distribution Date and the Pool Scheduled Principal Balance of the Mortgage
Loans for the following Distribution Date, (v) the Class A Percentage and  Class
M  Percentage for the  following Distribution Date,  and (vi) the  amount of the
remaining Special Hazard Loss Amount, the  Fraud Loss Amount and the  Bankruptcy
Loss Amount as of the close of business on such Distribution Date. The statement
delivered  to holders of the Class A-10 Certificates will also include the Class
A-10 Notional Amount and the weighted average Net Mortgage Interest Rate of  the
Mortgage  Loans applicable to  the following Distribution  Date minus 7.50%. The
statement delivered to the holder of the Class A-R Certificate will also include
the Class A-R Notional Amount. See "Servicing of the Mortgage Loans--Reports  to
Certificateholders" in the Prospectus.
 
    Copies  of the foregoing  reports are available upon  written request to the
Trustee  at  the  Corporate  Trust  Office.  See  "The  Pooling  and   Servicing
Agreement--Trustee" herein.
 
SUBORDINATION OF CLASS M AND CLASS B CERTIFICATES
 
    The   rights  of  the  holders  of  the  Class  M  Certificates  to  receive
distributions with respect  to the Mortgage  Loans in the  Trust Estate will  be
subordinated  to such rights of the holders  of the Class A Certificates and the
rights of the holders of the Class B Certificates to receive distributions  with
respect  to the Mortgage Loans in the  Trust Estate will be subordinated to such
rights of the holders of the Class A and Class M Certificates, all to the extent
described below. This  subordination is  intended to enhance  the likelihood  of
timely  receipt by the holders of the Class A Certificates (to the extent of the
subordination of the Class M  and Class B Certificates)  and the holders of  the
Class  M  Certificates  (to the  extent  of  the subordination  of  the  Class B
Certificates) of the full amount of their scheduled monthly payments of interest
and principal and  to afford the  holders of  the Class A  Certificates (to  the
extent  of the subordination  of the Class  M and Class  B Certificates) and the
holders of the Class M Certificates (to  the extent of the subordination of  the
Class  B  Certificates)  protection  against  Realized  Losses,  as  more  fully
described below. If Realized Losses  exceed the credit support provided  through
subordination  to the  Class A  and Class  M Certificates  or if  Excess Special
Hazard Losses, Excess Fraud Losses or  Excess Bankruptcy Losses occur, all or  a
portion of such losses will be borne by the Class A and Class M Certificates.
 
    The  protection afforded to the holders of  Class A Certificates by means of
the subordination feature will be accomplished by the preferential right of such
holders to receive, prior to any distribution being made on a Distribution  Date
in respect of the Class M and Class B Certificates, the amounts of principal and
interest due the Class A Certificateholders on each Distribution Date out of the
Pool  Distribution Amount with  respect to such  date and, if  necessary, by the
right of such holders to receive future
 
                                      S-39
<PAGE>
distributions on the Mortgage  Loans that would otherwise  have been payable  to
the  holders  of Class  M  and Class  B  Certificates. The  application  of this
subordination to  cover Realized  Losses  experienced in  periods prior  to  the
periods in which a Subclass of Class A Certificates is entitled to distributions
in  reduction of principal balance will  decrease the protection provided by the
subordination to any such Subclass.
 
    The protection afforded to the holders  of Class M Certificates by means  of
the subordination feature will be accomplished by the preferential right of such
holders  to receive, prior to any distribution being made on a Distribution Date
in respect of the  Class B Certificates, the  amounts of principal and  interest
due  the  Class M  Certificateholders on  each Distribution  Date from  the Pool
Distribution Amount with respect  to such date (after  all required payments  on
the Class A Certificates have been made) and, if necessary, by the right of such
holders  to  receive  future  distributions on  the  Mortgage  Loans  that would
otherwise have been payable to the holders of the Class B Certificates.
 
    The Class B Certificates will be entitled, on each Distribution Date, to the
remaining portion, if  any, of  the applicable Pool  Distribution Amount,  after
payment  of the Class A Distribution Amount  and the Class M Distribution Amount
for such date. Amounts so distributed to Class B Certificateholders will not  be
available  to cover  delinquencies or Realized  Losses in  respect of subsequent
Distribution Dates.
 
  ALLOCATION OF LOSSES
 
    Realized Losses  (other  than Excess  Special  Hazard Losses,  Excess  Fraud
Losses  or Excess Bankruptcy Losses) will not be allocated to the holders of the
Class A Certificates until the date on which the amount of principal payments on
the Mortgage Loans  to which the  holders of the  Subordinated Certificates  are
entitled has been reduced to zero as a result of the allocation of losses to the
Subordinated  Certificates, I.E., the date  on which the Subordinated Percentage
has been  reduced to  zero (the  "Cross-Over Date").  Prior to  such time,  such
Realized   Losses  will  be  allocated  first  to  the  subclasses  of  Class  B
Certificates sequentially in their  reverse numerical order,  until the Class  B
Subclass Principal Balances of each such subclass have been reduced to zero, and
then  to the Class M  Certificates until the Class  M Principal Balance has been
reduced to zero.
 
    The allocation of  the principal portion  of a Realized  Loss (other than  a
Debt  Service Reduction, Excess Special Hazard Loss, Excess Fraud Loss or Excess
Bankruptcy Loss) will be effected through the adjustment of the applicable Class
B Subclass  Principal Balance,  the Class  M Principal  Balance or  the Class  A
Subclass  Principal Balances,  as the  case may  be, required  by the definition
thereof in connection with the Adjusted Pool Amount.
 
    Allocations to the Class M Certificates  or Class B Certificates of (i)  the
principal  portion  of Debt  Service Reductions,  (ii)  the interest  portion of
Realized Losses (other than  Excess Special Hazard  Losses, Excess Fraud  Losses
and  Excess Bankruptcy Losses) and (iii)  any interest shortfalls resulting from
delinquencies for which  the Servicer  does not  advance, will  result from  the
priority  of distributions first  to the Class A  Certificateholders and then to
the Class  M Certificateholders  of the  Pool Distribution  Amount as  described
above under "--Distributions."
 
    The  principal  portion  of any  Realized  Loss  occurring on  or  after the
Cross-Over Date will be  allocated among the outstanding  Subclasses of Class  A
Certificates pro rata in accordance with their then outstanding Class A Subclass
Principal  Balances or, in  the case of the  Accrual Certificates, their initial
Class A Subclass Principal Balance, if lower, and among the outstanding Class  A
Certificates  within each Subclass pro rata  in accordance with their respective
Percentage Interests.
 
    Any Excess Special Hazard Losses,  Excess Fraud Losses or Excess  Bankruptcy
Losses  will be allocated  on a pro  rata basis among  the Class A,  Class M and
Class B Certificates (any such losses  so allocated to the Class A  Certificates
will  be allocated among the outstanding  Subclasses of Class A Certificates pro
rata in  accordance  with their  then  outstanding Class  A  Subclass  Principal
Balances  or, in  the case  of the Accrual  Certificates, their  initial Class A
Subclass Principal Balance, if  lower, in the case  of the principal portion  of
such  losses and their Class A Subclass  Interest Accrual Amounts in the case of
an  interest  portion  of  such  losses,  and  among  the  outstanding  Class  A
Certificates within each Subclass
 
                                      S-40
<PAGE>
pro   rata  in  accordance  with  their  respective  Percentage  Interests).  An
allocation of  a loss  on  a "pro  rata  basis" among  two  or more  Classes  of
Certificates  means an  allocation on  a pro  rata basis  to each  such Class of
Certificates on the basis  of their then outstanding  principal balances in  the
case of the principal portion of a loss or based on the accrued interest thereon
in the case of an interest portion of a loss.
 
    The interest portion of Excess Special Hazard Losses, Excess Fraud Losses or
Excess  Bankruptcy Losses will  be allocated by reducing  the applicable Class B
Subclass Interest Accrual  Amount, Class M  Interest Accrual Amount  or Class  A
Interest Accrual Amount, as the case may be.
 
    As  described above, the Pool Distribution  Amount for any Distribution Date
will include  current  receipts  (other than  certain  unscheduled  payments  in
respect  of principal) from  the Mortgage Loans otherwise  payable to holders of
the Class M and  Class B Certificates.  If the Pool  Distribution Amount is  not
sufficient  to cover the amount of principal payable to the holders of the Class
A Certificates on a particular Distribution Date (other than any portion thereof
representing the  difference between  the Class  A Percentage  of the  Scheduled
Principal  Balances of Liquidated Loans and the Class A Prepayment Percentage of
such amounts), then the percentage of  principal payments on the Mortgage  Loans
to  which the holders  of the Class  A Certificates will  be entitled (I.E., the
Class  A  Percentage)  on  and  after   the  next  Distribution  Date  will   be
proportionately   increased,  thereby  reducing,  as   a  relative  matter,  the
respective interest of the Class M  and Class B Certificates in future  payments
of  principal on the Mortgage Loans in  the Trust Estate. Such a shortfall could
occur, for example, if  a considerable number of  Mortgage Loans were to  become
Liquidated Loans in a particular month.
 
    Special  Hazard Losses will be allocated solely to the Class B Certificates,
or following the reduction of the Class  B Principal Balance to zero, solely  to
the Class M Certificates, but only prior to the Special Hazard Termination Date.
The  "Special Hazard Termination Date" will be  the date on which Special Hazard
Losses exceed the  Special Hazard Loss  Amount (or, if  earlier, the  Cross-Over
Date).  Upon initial issuance  of the Series  1992-13 Certificates, the "Special
Hazard Loss Amount" with  respect thereto will be  equal to approximately  1.26%
(approximately  $5,612,335) of the  Cut-Off Date Aggregate  Principal Balance of
the Mortgage Loans. As of any Distribution Date, the Special Hazard Loss  Amount
will  equal  the initial  Special Hazard  Loss Amount  less the  sum of  (A) any
Special Hazard Losses allocated  solely to the Class  B or Class M  Certificates
and  (B) the Adjustment  Amount. The "Adjustment Amount"  on each anniversary of
the Cut-Off Date  will be  equal to  the amount, if  any, by  which the  Special
Hazard  Amount, without giving effect to  the deduction of the Adjustment Amount
for such anniversary,  exceeds the  greater of (i)  1.00% (or,  if greater  than
1.00%,  the highest  percentage of  Mortgage Loans  by principal  balance in any
California zip code) times the aggregate  principal balance of all the  Mortgage
Loans  on such anniversary  and (ii) twice  the principal balance  of the single
Mortgage Loan having  the largest  principal balance. Special  Hazard Losses  in
excess of the Special Hazard Loss Amount are "Excess Special Hazard Losses".
 
    Fraud  Losses  will be  allocated  solely to  the  Class B  Certificates, or
following the reduction of the Class B Principal Balance to zero, solely to  the
Class  M Certificates but only prior to the Fraud Coverage Termination Date. The
"Fraud Coverage Termination Date" will be the date on which Fraud Losses  exceed
the  Fraud  Loss Amount  (or,  if earlier,  the  Cross-Over Date).  Upon initial
issuance of  the  Series 1992-13  Certificates,  the "Fraud  Loss  Amount"  with
respect  thereto will be equal to approximately 2.00% (approximately $8,908,469)
of the Cut-Off Date Aggregate Principal  Balance of the Mortgage Loans. On  each
Distribution  Date thereafter, the Fraud Loss Amount will equal (X) prior to the
first anniversary of the Cut-Off Date an amount equal to the initial Fraud  Loss
Amount  minus the aggregate amount of Fraud Losses allocated solely to the Class
B or the Class M Certificates up to the related Determination Date, and (Y) from
the first through fifth anniversary of the Cut-Off Date, an amount equal to  (1)
the lesser of (a) the Fraud Loss Amount as of the most recent anniversary of the
Cut-Off  Date and  (b) 1.00% of  the aggregate  principal balance of  all of the
Mortgage Loans as of the most recent  anniversary of the Cut-Off Date minus  (2)
the  aggregate  amounts  allocated  solely  to  the  Class  B  or  the  Class  M
Certificates with respect to Fraud Losses  since the most recent anniversary  of
the Cut-Off Date
 
                                      S-41
<PAGE>
up to the related Determination Date. After the fifth anniversary of the Cut-Off
Date, the Fraud Loss Amount will be zero and thereafter any Fraud Losses will be
shared  pro rata  among the  Class A,  Class M  and Class  B Certificates. Fraud
Losses in excess of the Fraud Loss Amount are "Excess Fraud Losses."
 
    Bankruptcy Losses will be allocated solely  to the Class B Certificates,  or
following  the reduction of the  Class B Principal Balance  to zero, the Class M
Certificates but only  prior to  the Bankruptcy Coverage  Termination Date.  The
"Bankruptcy  Coverage Termination  Date" will  be the  date on  which Bankruptcy
Losses exceed the Bankruptcy Loss Amount (or, if earlier, the Cross-Over  Date).
Upon  initial issuance of the Series  1992-13 Certificates, the "Bankruptcy Loss
Amount" with respect thereto will be equal to approximately 0.03% (approximately
$137,158) of the Cut-Off Date Aggregate Principal Balance of the Mortgage Loans.
As of any Distribution Date, the  Bankruptcy Loss Amount will equal the  initial
Bankruptcy Loss Amount minus the aggregate amount of Bankruptcy Losses allocated
solely  to the Class B and Class  M Certificates up to the related Determination
Date. The Bankruptcy Loss Amount and the related coverage levels described above
may be reduced  or modified upon  written confirmation from  S&P and Fitch  that
such  reduction  or  modification  will not  adversely  affect  the then-current
ratings assigned to the Class A and Class M Certificates by S&P and Fitch.  Such
a  reduction  or  modification may  adversely  affect the  coverage  provided by
subordination with respect to Bankruptcy Losses. Bankruptcy Losses in excess  of
the Bankruptcy Loss Amount are "Excess Bankruptcy Losses."
 
    Notwithstanding the foregoing, the provisions relating to subordination will
not  be applicable in connection with a  Bankruptcy Loss so long as the Servicer
has notified the Trustee in writing that the Servicer is diligently pursuing any
remedies that may exist  in connection with  the representations and  warranties
made  regarding the related Mortgage Loan and when (A) the related Mortgage Loan
is not in default with regard to  the payments due thereunder or (B)  delinquent
payments  of  principal and  interest under  the related  Mortgage Loan  and any
premiums on  any applicable  Standard Hazard  Insurance Policy  and any  related
escrow payments in respect of such Mortgage Loan are being advanced on a current
basis  by the Servicer, in either case without giving effect to any Debt Service
Reduction.
 
    Since the  initial principal  balance of  the Class  B Certificates  in  the
aggregate  will be approximately $16,704,441, the risk of Special Hazard Losses,
Fraud Losses and Bankruptcy Losses will be borne by the Class B Certificates  to
a  lesser extent (I.E.,  only up to  the Special Hazard  Loss Amount, Fraud Loss
Amount and Bankruptcy Loss Amount, respectively) than the risk of other Realized
Losses, which  they will  bear to  the full  extent of  their initial  principal
balance.   See   "The  Trust   Estates--Mortgage  Loans--   Representations  and
Warranties" and "--Insurance Policies," "Certain  Legal Aspects of the  Mortgage
Loans--Environmental    Considerations"   and   "Servicing   of   the   Mortgage
Loans--Enforcement of Due-on-Sale Clauses;  Realization Upon Defaulted  Mortgage
Loans" in the Prospectus.
 
                                      S-42
<PAGE>
                      DESCRIPTION OF THE MORTGAGE LOANS(1)
 
    The Mortgage Loans to be included in the Trust Estate will be fixed interest
rate,   conventional,  monthly  pay,  fully  amortizing,  one-  to  four-family,
residential first mortgage  loans originated  or acquired  by PHMC  for its  own
account  or for  the account  of an  affiliate having  original terms  to stated
maturity of approximately 15 years. The  Mortgage Loans are expected to  include
1,711  promissory notes, to have an aggregate unpaid principal balance as of the
Cut-Off Date (the "Cut-Off Date  Aggregate Principal Balance") of  approximately
$445,423,441,  to be secured by  first liens (the "Mortgages")  on one- to four-
family residential  properties  (the "Mortgaged  Properties")  and to  have  the
additional characteristics described below and in the Prospectus.
 
    No Mortgage Loan is a Buy-Down Loan. See "The Trust Estates--Mortgage Loans"
in the Prospectus.
 
    Each  of the Mortgage Loans is subject to a due-on-sale clause. See "Certain
Legal Aspects of  the Mortgage Loans--'Due-on-Sale'  Clauses" and "Servicing  of
the   Mortgage  Loans--Enforcement  of  Due-on-Sale  Clauses;  Realization  Upon
Defaulted Mortgage Loans" in the Prospectus.
 
    As of the Cut-Off  Date, each Mortgage  Loan is expected  to have an  unpaid
principal  balance  of not  less than  $12,112  or more  than $994,586,  and the
average unpaid  principal  balance of  the  Mortgage  Loans is  expected  to  be
approximately  $260,329. The latest stated maturity  date of any of the Mortgage
Loans is expected  to be  May 1,  2007; however, the  actual date  on which  any
Mortgage  Loan is paid in full may be  earlier than the stated maturity date due
to unscheduled  payments of  principal.  Based on  information supplied  by  the
mortgagors  in connection with their loan  applications at origination, 1,578 of
the Mortgaged Properties, which secure approximately 94.87% of the Cut-Off  Date
Aggregate  Principal Balance  of the  Mortgage Loans,  are expected  to be owner
occupied primary residences and  133 of the  Mortgaged Properties, which  secure
approximately  5.13%  of the  Cut-Off Date  Aggregate  Principal Balance  of the
Mortgage Loans,  are expected  to be  non-owner occupied  or second  homes.  See
"PHMC--Mortgage Loan Underwriting" in the Prospectus.
 
    It  is expected  that approximately 59  of the  Mortgage Loans, representing
approximately 2.22%  of the  Cut-Off  Date Aggregate  Principal Balance  of  the
Mortgage  Loans,  will  be  mortgage loans  originated  in  connection  with the
relocation of employees of various  corporate employers participating in  PHMC's
relocation  program  and  of  employees  of  various  non-participant  employers
("Relocation Mortgage Loans").
 
    It is expected that  six of the  Mortgage Loans, representing  approximately
0.24%  of the  Cut-Off Date Aggregate  Principal Balance of  the Mortgage Loans,
will  be  Subsidy  Loans.   See  "The  Trust   Estates--  Mortgage  Loans"   and
"PHMC--Mortgage Loan Underwriting" in the Prospectus.
 
- ------------
(1) The  descriptions in this Prospectus Supplement  of the Trust Estate and the
    properties securing the Mortgage  Loans to be included  in the Trust  Estate
    are  based upon  the expected characteristics  of the Mortgage  Loans at the
    close of  business  on the  Cut-Off  Date,  as adjusted  for  the  scheduled
    principal   payments  due  on  or  before  such  date.  Notwithstanding  the
    foregoing, any of such Mortgage Loans may be excluded from the Trust  Estate
    (i)  as a result  of principal prepayment thereof  in full or  (ii) if, as a
    result of  delinquencies  or  otherwise, the  Seller  otherwise  deems  such
    exclusion  necessary or desirable. In either event, other Mortgage Loans may
    be included in the  Trust Estate. The Seller  believes that the  information
    set  forth  herein  with  respect to  the  expected  characteristics  of the
    Mortgage Loans on the Cut-Off Date is representative of the  characteristics
    as  of the Cut-Off  Date of the Mortgage  Loans to be  included in the Trust
    Estate as it will be constituted at the time the Series 1992-13 Certificates
    are issued, although the Cut-Off Date Aggregate Principal Balance, the range
    of Mortgage Interest Rates and maturities, and certain other characteristics
    of the Mortgage Loans in the Trust Estate may vary. In the event that any of
    the characteristics  as of  the  Cut-Off Date  of  the Mortgage  Loans  that
    constitute  the Trust Estate on  the date of initial  issuance of the Series
    1992-13 Certificates vary  materially from those  described herein,  revised
    information   regarding  the  Mortgage  Loans  will  be  made  available  to
    purchasers of the Class A Certificates, on or before such issuance date, and
    a Current Report on Form 8-K containing such information will be filed  with
    the Securities and Exchange Commission within 15 days following such date.
 
                                      S-43
<PAGE>
    Set   forth  below   is  a   description  of   certain  additional  expected
characteristics of  the  Mortgage  Loans  as of  the  Cut-Off  Date  (except  as
otherwise indicated).
 
                            MORTGAGE INTEREST RATES
 
<TABLE>
<CAPTION>
                                                                       PERCENTAGE OF
                                                         AGGREGATE      CUT-OFF DATE
                                          NUMBER OF       UNPAID         AGGREGATE
                                          MORTGAGE       PRINCIPAL       PRINCIPAL
MORTGAGE INTEREST RATES                     LOANS         BALANCE         BALANCE
- ----------------------------------------  ---------   ---------------  --------------
<S>                                       <C>         <C>              <C>
 7.750%.................................       47     $  9,013,478.44        2.02   %
 7.875%.................................      139       36,834,643.01        8.27
 8.000%.................................      110       30,206,634.30        6.78
 8.125%.................................      138       31,233,550.27        7.01
 8.250%.................................      215       60,051,987.76       13.49
 8.375%.................................      180       44,350,973.13        9.96
 8.500%.................................      189       49,804,633.65       11.18
 8.625%.................................      209       58,150,956.58       13.06
 8.750%.................................      170       46,744,127.29       10.49
 8.875%.................................      143       40,820,545.50        9.16
 9.000%.................................       87       22,001,294.31        4.94
 9.125%.................................       36        7,262,284.27        1.63
 9.250%.................................       29        4,602,376.08        1.03
 9.375%.................................        5          889,899.69        0.20
 9.500%.................................        3          348,839.50        0.08
 9.625%.................................        2          579,528.19        0.13
 9.750%.................................        1          488,523.14        0.11
 9.875%.................................        5        1,354,864.10        0.30
10.000%.................................        2          648,254.30        0.15
10.875%.................................        1           36,047.20        0.01
                                          ---------   ---------------     -------
        Total...........................    1,711     $445,423,440.71      100.00   %
                                          ---------   ---------------     -------
                                          ---------   ---------------     -------
</TABLE>
 
As  of the  Cut-Off Date,  the weighted  average Mortgage  Interest Rate  of the
Mortgage Loans  is  expected to  be  approximately  8.458% per  annum.  The  Net
Mortgage  Interest Rate  of each  Mortgage Loan  will be  equal to  the Mortgage
Interest Rate of such Mortgage  Loan minus the Servicing  Fee rate of 0.25%  per
annum.  As of the Cut-Off Date, the  weighted average Net Mortgage Interest Rate
of the Mortgage Loans is expected to be approximately 8.208% per annum.
 
                                      S-44
<PAGE>
                      REMAINING MONTHS TO STATED MATURITY
 
<TABLE>
<CAPTION>
                                                                       PERCENTAGE OF
                                                         AGGREGATE      CUT-OFF DATE
                                          NUMBER OF       UNPAID         AGGREGATE
                                          MORTGAGE       PRINCIPAL       PRINCIPAL
REMAINING STATED TERM (MONTHS)              LOANS         BALANCE         BALANCE
- ----------------------------------------  ---------   ---------------  --------------
<S>                                       <C>         <C>              <C>
86......................................        1     $     65,713.99        0.01   %
120.....................................        1           46,531.26        0.01
147.....................................        1           36,047.20        0.01
168.....................................        1           53,201.38        0.01
170.....................................        3        1,025,364.98        0.23
171.....................................        6        1,984,535.43        0.45
172.....................................        6          836,267.83        0.19
173.....................................        1          343,592.11        0.08
174.....................................       36        6,657,557.49        1.49
175.....................................       24        4,947,533.08        1.11
176.....................................       50       10,339,301.25        2.32
177.....................................      194       47,188,060.50       10.59
178.....................................      524      149,699,103.73       33.61
179.....................................      804      207,607,860.48       46.61
180.....................................       59       14,592,770.00        3.28
                                          ---------   ---------------     -------
      Total.............................    1,711     $445,423,440.71      100.00   %
                                          ---------   ---------------     -------
                                          ---------   ---------------     -------
</TABLE>
 
As  of the Cut-Off Date, the weighted  average remaining term to stated maturity
of the Mortgage Loans is expected to be approximately 178 months.
 
                              YEARS OF ORIGINATION
 
<TABLE>
<CAPTION>
                                                                       PERCENTAGE OF
                                                         AGGREGATE      CUT-OFF DATE
                                          NUMBER OF       UNPAID         AGGREGATE
                                          MORTGAGE       PRINCIPAL       PRINCIPAL
YEAR OF ORIGINATION                         LOANS         BALANCE         BALANCE
- ----------------------------------------  ---------   ---------------  --------------
<S>                                       <C>         <C>              <C>
1984....................................        1     $     65,713.99        0.01   %
1987....................................        1           46,531.26        0.01
1989....................................        1           36,047.20        0.01
1991....................................      129       26,728,903.12        6.00
1992....................................    1,579      418,546,245.14       93.97
                                          ---------   ---------------     -------
      Total.............................    1,711     $445,423,440.71      100.00   %
                                          ---------   ---------------     -------
                                          ---------   ---------------     -------
</TABLE>
 
It is expected that the earliest month  and year of origination of any  Mortgage
Loan was June 1984 and the latest month and year of origination was April 1992.
 
                                      S-45
<PAGE>
                         ORIGINAL LOAN-TO-VALUE RATIOS
 
<TABLE>
<CAPTION>
                                                                       PERCENTAGE OF
                                                         AGGREGATE      CUT-OFF DATE
                                          NUMBER OF       UNPAID         AGGREGATE
                                          MORTGAGE       PRINCIPAL       PRINCIPAL
LOAN-TO-VALUE RATIO                         LOANS         BALANCE         BALANCE
- ----------------------------------------  ---------   ---------------  --------------
<S>                                       <C>         <C>              <C>
50.00% or less..........................      332     $ 76,147,055.94       17.10   %
50.01-55.00%............................       99       29,050,431.51        6.52
55.01-60.00%............................      134       37,038,224.55        8.32
60.01-65.00%............................      165       45,855,126.95       10.29
65.01-70.00%............................      207       56,744,687.81       12.74
70.01-75.00%............................      335       87,288,051.76       19.60
75.01-80.00%............................      381       98,806,202.11       22.18
80.01-85.00%............................        8        2,065,034.95        0.46
85.01-90.00%............................       50       12,428,625.13        2.79
                                          ---------   ---------------     -------
      Total.............................    1,711     $445,423,440.71      100.00   %
                                          ---------   ---------------     -------
                                          ---------   ---------------     -------
</TABLE>
 
As  of  the  Cut-Off  Date,  the minimum  and  maximum  Loan-to-Value  Ratios at
origination of  the  Mortgage  Loans  are  expected  to  be  9.84%  and  90.00%,
respectively, and the weighted average Loan-to-Value Ratio at origination of the
Mortgage Loans is expected to be approximately 65%. The Loan-to-Value Ratio of a
Mortgage  Loan is calculated using the lesser  of (i) the appraised value of the
related Mortgaged  Property, as  established  by an  appraisal obtained  by  the
originator  from an appraiser at the time of origination and (ii) the sale price
for such property. See "The Trust Estates--Mortgage Loans" in the Prospectus. It
is expected  that  22 of  the  Mortgage  Loans having  Loan-to-Value  Ratios  at
origination  in excess of  80%, representing approximately  1.19% of the Cut-Off
Date Aggregate Principal Balance of the Mortgage Loans, were originated  without
primary  mortgage  insurance.  See  "PHMC--Mortgage  Loan  Underwriting"  in the
Prospectus.
 
                       MORTGAGE LOAN DOCUMENTATION LEVELS
 
<TABLE>
<CAPTION>
                                                                       PERCENTAGE OF
                                                         AGGREGATE      CUT-OFF DATE
                                          NUMBER OF       UNPAID         AGGREGATE
                                          MORTGAGE       PRINCIPAL       PRINCIPAL
DOCUMENTATION LEVELS                        LOANS         BALANCE         BALANCE
- ----------------------------------------  ---------   ---------------  --------------
<S>                                       <C>         <C>              <C>
Full Documentation......................      994     $300,885,318.68       67.55   %
Asset and Income Verification...........       16        4,328,075.65        0.97
Asset and Mortgage Verification.........      330       69,091,719.92       15.51
Income and Mortgage Verification........        7        1,622,794.56        0.36
Asset Verification......................       69       12,647,576.41        2.84
Income Verification.....................        3          258,903.15        0.06
Mortgage Verification...................      211       44,261,524.96        9.94
Preferred Processing....................       81       12,327,527.38        2.77
                                          ---------   ---------------     -------
      Total.............................    1,711     $445,423,440.71      100.00   %
                                          ---------   ---------------     -------
                                          ---------   ---------------     -------
</TABLE>
 
Documentation levels vary depending upon several factors, including loan amount,
Loan-to-Value Ratio and the type and purpose of the Mortgage Loan. Asset, income
and mortgage verifications were obtained for Mortgage Loans processed with "full
documentation." In the case of "preferred processing," neither asset, income nor
mortgage verifications were obtained.  However, for all  of the Mortgage  Loans,
verification of the borrower's employment, a credit report on the borrower and a
property  appraisal were obtained. See "PHMC--Mortgage Loan Underwriting" in the
Prospectus.
 
                                      S-46
<PAGE>
                   ORIGINAL MORTGAGE LOAN PRINCIPAL BALANCES
 
<TABLE>
<CAPTION>
                                                                       PERCENTAGE OF
                                                         AGGREGATE      CUT-OFF DATE
                ORIGINAL                  NUMBER OF       UNPAID         AGGREGATE
             MORTGAGE LOAN                MORTGAGE       PRINCIPAL       PRINCIPAL
           PRINCIPAL BALANCE                LOANS         BALANCE         BALANCE
          --------------------            ---------   ---------------  --------------
<S>                                       <C>         <C>              <C>
Less than or equal to $200,000..........      523     $ 56,576,259.27       12.70   %
$200,001-$250,000.......................      294       68,102,102.40       15.29
$250,001-$300,000.......................      358       98,632,261.37       22.13
$300,001-$350,000.......................      202       65,867,886.24       14.79
$350,001-$400,000.......................      122       45,969,818.54       10.32
$400,001-$450,000.......................       69       29,350,002.03        6.59
$450,001-$500,000.......................       63       30,034,171.59        6.74
$500,001-$550,000.......................       22       11,571,188.26        2.60
$550,001-$600,000.......................       33       19,315,385.65        4.34
$600,001-$650,000.......................        4        2,518,833.40        0.57
$650,001-$700,000.......................        4        2,715,084.27        0.61
$700,001-$750,000.......................        2        1,495,976.26        0.34
$750,001-$800,000.......................        2        1,532,751.87        0.34
$800,001-$850,000.......................        3        2,433,690.50        0.55
$850,001-$900,000.......................        3        2,643,764.55        0.59
$900,001-$950,000.......................        4        3,736,547.58        0.84
$950,001-$1,000,000.....................        3        2,927,716.93        0.66
                                          ---------   ---------------     -------
      Total.............................    1,711     $445,423,440.71      100.00   %
                                          ---------   ---------------     -------
                                          ---------   ---------------     -------
</TABLE>
 
As of the  Cut-Off Date, the  average unpaid principal  balance of the  Mortgage
Loans  is expected  to be  approximately $260,329. As  of the  Cut-Off Date, the
weighted  average   Loan-to-Value  Ratio   at   origination  and   the   maximum
Loan-to-Value  Ratio at  origination of  the Mortgage  Loans which  had original
principal balances in excess of $600,000 are expected to be approximately 56.71%
and  70.00%,  respectively.   See  "The  Trust   Estates--Mortgage  Loans"   and
"PHMC--Mortgage Loan Underwriting" in the Prospectus.
 
                              MORTGAGED PROPERTIES
 
<TABLE>
<CAPTION>
                                                                       PERCENTAGE OF
                                                         AGGREGATE      CUT-OFF DATE
                                          NUMBER OF       UNPAID         AGGREGATE
                                          MORTGAGE       PRINCIPAL       PRINCIPAL
PROPERTY                                    LOANS         BALANCE         BALANCE
- ----------------------------------------  ---------   ---------------  --------------
<S>                                       <C>         <C>              <C>
Single-family detached..................    1,611     $429,610,968.65       96.45   %
Two- to four-family units...............       19        3,237,242.01        0.73
Condominiums
    High-rise (four stories or more)....       25        4,386,613.93        0.98
    Low-rise (less than four stories)...       48        7,201,180.05        1.62
Planned unit developments...............        5          533,290.70        0.12
Townhouses..............................        3          454,145.37        0.10
                                          ---------   ---------------     -------
      Total.............................    1,711     $445,423,440.71      100.00   %
                                          ---------   ---------------     -------
                                          ---------   ---------------     -------
</TABLE>
 
                                      S-47
<PAGE>
               GEOGRAPHICAL DISTRIBUTION OF MORTGAGED PROPERTIES
 
<TABLE>
<CAPTION>
                                                                       PERCENTAGE OF
                                                         AGGREGATE      CUT-OFF DATE
                                          NUMBER OF       UNPAID         AGGREGATE
                                          MORTGAGE       PRINCIPAL       PRINCIPAL
STATE                                       LOANS         BALANCE         BALANCE
- ----------------------------------------  ---------   ---------------  --------------
<S>                                       <C>         <C>              <C>
Alabama.................................        7     $  2,270,336.81        0.51   %
Alaska..................................        1          262,762.35        0.06
Arizona.................................       20        3,835,336.65        0.86
California..............................      656      212,818,435.41       47.78
Colorado................................       22        5,357,143.83        1.20
Connecticut.............................       42       11,349,066.90        2.55
Delaware................................        5        1,233,919.39        0.28
District of Columbia....................        5        2,090,529.64        0.47
Florida.................................       82       15,827,108.39        3.55
Georgia.................................       19        2,621,908.05        0.59
Hawaii..................................        9        2,012,752.01        0.45
Illinois................................       36        7,200,009.93        1.62
Indiana.................................        5          907,912.54        0.20
Iowa....................................        2          136,163.83        0.03
Kansas..................................        2          261,193.39        0.06
Kentucky................................        2          321,143.98        0.07
Louisiana...............................        5          936,233.61        0.21
Maine...................................        1          148,305.31        0.03
Maryland................................       46       12,193,364.72        2.74
Massachusetts...........................       25        5,982,832.75        1.34
Michigan................................       16        2,545,515.46        0.57
Minnesota...............................       10        1,639,024.92        0.37
Missouri................................        7        1,700,757.95        0.38
Montana.................................        3          535,982.71        0.12
Nebraska................................        2           79,405.87        0.02
Nevada..................................       14        4,815,070.34        1.08
New Hampshire...........................        5        1,132,121.34        0.25
New Jersey..............................      177       39,356,119.13        8.84
New Mexico..............................        1          134,626.85        0.03
New York................................      184       37,978,598.49        8.53
North Carolina..........................       14        2,732,709.65        0.61
Ohio....................................       21        4,975,484.23        1.12
Oklahoma................................        3          597,765.00        0.13
Oregon..................................       14        2,679,367.85        0.60
Pennsylvania............................       50        8,632,849.77        1.94
Rhode Island............................        4          478,975.76        0.11
South Carolina..........................       11        3,385,101.47        0.76
Tennessee...............................       12        2,505,674.62        0.56
Texas...................................       76       18,863,706.48        4.24
Utah....................................        4          847,886.15        0.19
Vermont.................................        6        1,227,606.49        0.28
Virginia................................       51       13,592,735.19        3.05
Washington..............................       28        6,544,385.69        1.47
West Virginia...........................        4          406,530.38        0.09
Wisconsin...............................        1           87,089.26        0.02
Wyoming.................................        1          181,890.17        0.04
                                          ---------   ---------------     -------
      Total.............................    1,711     $445,423,440.71      100.00   %
                                          ---------   ---------------     -------
                                          ---------   ---------------     -------
</TABLE>
 
No  more  than 1.26%  of the  Cut-Off  Date Aggregate  Principal Balance  of the
Mortgage Loans is expected to be secured by Mortgaged Properties located in  any
one zip code.
 
                                      S-48
<PAGE>
                         ORIGINATORS OF MORTGAGE LOANS
 
<TABLE>
<CAPTION>
                                                                       PERCENTAGE OF
                                                         AGGREGATE      CUT-OFF DATE
                                          NUMBER OF       UNPAID         AGGREGATE
                                          MORTGAGE       PRINCIPAL       PRINCIPAL
ORIGINATOR                                  LOANS         BALANCE         BALANCE
- ----------------------------------------  ---------   ---------------  --------------
<S>                                       <C>         <C>              <C>
PHMC or Affiliate.......................      682     $150,731,774.40       33.84   %
Other Originators.......................    1,029      294,691,666.31       66.16
                                          ---------   ---------------     -------
      Total.............................    1,711     $445,423,440.71      100.00   %
                                          ---------   ---------------     -------
                                          ---------   ---------------     -------
</TABLE>
 
It  is expected that,  as of the  Cut-Off Date, no  "Other Originator" will have
accounted for more than 5.00% of the Cut-Off Date Aggregate Principal Balance of
the  Mortgage  Loans.  See  "PHMC--Mortgage  Loan  Production  Sources"  in  the
Prospectus.
 
                           PURPOSES OF MORTGAGE LOANS
 
<TABLE>
<CAPTION>
                                                                       PERCENTAGE OF
                                                         AGGREGATE      CUT-OFF DATE
                                          NUMBER OF       UNPAID         AGGREGATE
                                          MORTGAGE       PRINCIPAL       PRINCIPAL
LOAN PURPOSE                                LOANS         BALANCE         BALANCE
- ----------------------------------------  ---------   ---------------  --------------
<S>                                       <C>         <C>              <C>
Purchase................................      235     $ 48,808,196.92       10.96   %
Rate/Term Refinance.....................    1,183      325,751,445.71       73.13
Equity Take Out Refinance...............      293       70,863,798.08       15.91
                                          ---------   ---------------     -------
      Total.............................    1,711     $445,423,440.71      100.00   %
                                          ---------   ---------------     -------
                                          ---------   ---------------     -------
</TABLE>
 
In  general,  in the  case of  a  Mortgage Loan  made for  "rate/term" refinance
purposes, substantially  all  of  the proceeds  are  used  to pay  in  full  the
principal balance of a previous mortgage loan of the mortgagor with respect to a
Mortgaged Property and to pay origination and closing costs associated with such
refinancing.  However, in the case of a Mortgage Loan made for "equity take out"
refinance purposes, all or a portion  of the proceeds are generally retained  by
the  mortgagor for uses unrelated to the  Mortgaged Property. The amount of such
proceeds  retained  by  the  mortgagor  may  be  substantial.  See  "The   Trust
Estates--Mortgage   Loans"  and   "PHMC--Mortgage  Loan   Underwriting"  in  the
Prospectus.
 
MANDATORY REPURCHASE OR SUBSTITUTION OF MORTGAGE LOANS
 
    The Seller is required, with respect to Mortgage Loans that are found by the
Trustee to have defective documentation, or  in respect of which the Seller  has
breached  a representation or warranty, either to repurchase such Mortgage Loans
or, if within two years  of the date of initial  issuance of the Series  1992-13
Certificates,  to substitute new  Mortgage Loans therefor.  Any Mortgage Loan so
substituted must, among other things, have an unpaid principal balance equal  to
or  less than the Scheduled Principal Balance  of the Mortgage Loan for which it
is being substituted (after giving effect to the scheduled principal payment due
in the month of substitution on the Mortgage Loan for which a new Mortgage  Loan
is  being  substituted), a  Loan-to-Value Ratio  less  than or  equal to,  and a
Mortgage Interest Rate  no less than,  and no  more than one  percent per  annum
greater  than, that of the Mortgage Loan  for which it is being substituted. Any
such substitution may be made only upon receipt by the Trustee of an opinion  of
counsel   or  other  satisfactory  evidence   that,  among  other  things,  such
substitution will not subject the Trust Estate to tax or cause the Trust  Estate
to  fail to qualify as a REMIC. See "Prepayment and Yield Considerations" herein
and "The  Trust Estates--Mortgage  Loans--Assignment of  Mortgage Loans  to  the
Trustee" in the Prospectus.
 
OPTIONAL REPURCHASE OF DEFAULTED MORTGAGE LOANS
 
    The  Seller may, in  its sole discretion,  repurchase any defaulted Mortgage
Loan from the Trust Estate at a  price equal to the unpaid principal balance  of
such  Mortgage  Loan, together  with accrued  interest  at a  rate equal  to the
Mortgage Interest  Rate  through  the  last  day of  the  month  in  which  such
repurchase occurs. See "The Trust Estates--Mortgage Loans--Optional Repurchases"
in the Prospectus. The
 
                                      S-49
<PAGE>
Servicer  may,  in its  sole  discretion, allow  the  assumption of  a defaulted
Mortgage Loan by a borrower meeting PHMC's underwriting guidelines or  encourage
the  refinancing  of  a  defaulted  Mortgage  Loan.  See  "Prepayment  and Yield
Considerations" herein  and "Servicing  of  the Mortgage  Loans--Enforcement  of
Due-on-Sale   Clauses;  Realization  Upon  Defaulted   Mortgage  Loans"  in  the
Prospectus.
 
              ORIGINATION, DELINQUENCY AND FORECLOSURE EXPERIENCE
 
LOAN ORIGINATION
 
    During the years ended  December 31, 1990, December  31, 1991 and the  three
months  ended March 31, 1992, PHMC originated  or purchased, for its own account
or for the account of an affiliate, conventional mortgage loans having aggregate
principal  balances   of   approximately  $5,837,566,957,   $9,742,858,764   and
$4,497,908,446, respectively.
 
DELINQUENCY AND FORECLOSURE EXPERIENCE
 
    The  following  tables  set  forth  certain  information  concerning  recent
delinquency, foreclosure and loan loss  experience on the conventional  mortgage
loans included in PHMC's mortgage loan servicing portfolio which were originated
by  PHMC for its own account  or for the account of  an affiliate or acquired by
PHMC for its own account or for the account of an affiliate and underwritten  to
PHMC's  underwriting standards (the "Program Loans"), on the Program Loans which
are fixed interest rate  mortgage loans ("Fixed  Program Loans"), including,  in
both  cases, Relocation  Mortgage Loans, and  on the Fixed  Program Loans, other
than Relocation Mortgage Loans, having original  terms to stated maturity of  15
years  ("Fixed 15-Year Non-relocation  Program Loans"). See  "Description of the
Mortgage  Loans"   herein   and   "The  Trust   Estates--Mortgage   Loans"   and
"PHMC--General,"   "--Mortgage  Loan  Underwriting"  and  "--Servicing"  in  the
Prospectus. The delinquency, foreclosure and loan loss experience represents the
recent experience of PHMC and The Prudential Mortgage Capital Company, Inc.,  an
affiliate of PHMC which serviced the Program Loans prior to June 30, 1989. There
can  be no assurance that the  delinquency, foreclosure and loan loss experience
set forth with  respect to PHMC's  total servicing portfolio  of Program  Loans,
which  includes both fixed and adjustable interest rate mortgage loans and loans
having a  variety of  original  terms to  stated maturity  including  Relocation
Mortgage   Loans  and  non-relocation  mortgage   loans,  and  PHMC's  servicing
portfolios of Fixed Program Loans or Fixed 15-Year Non-relocation Program Loans,
each of which includes loans having  a variety of payment characteristics,  such
as  Subsidy Loans, Buy-Down  Loans and Balloon Loans,  will be representative of
the results that may be experienced with respect to the Mortgage Loans  included
in the Trust Estate.
 
    Historically,  Relocation  Mortgage  Loans, which  constitute  a significant
percentage of the Mortgage Loans currently serviced by PHMC, have experienced  a
significantly  lower  rate of  delinquency and  foreclosure than  other mortgage
loans included in the portfolios of total Program Loans and Fixed Program Loans.
There can  be no  assurance that  the future  experience on  the Mortgage  Loans
contained  in the Trust  Estate, all of  which are fixed  interest rate mortgage
loans having original  terms to stated  maturity of 15  years and  approximately
2.22%  (by percentage of Cut-Off Date  Aggregate Principal Balance) of which are
Relocation Mortgage  Loans, will  be comparable  to that  of the  total  Program
Loans,  the  Fixed Program  Loans or  the  Fixed 15-Year  Non-relocation Program
Loans.
 
                                      S-50
<PAGE>
                              TOTAL PROGRAM LOANS
 
<TABLE>
<CAPTION>
                           AS OF                   AS OF                   AS OF
                     DECEMBER 31, 1990       DECEMBER 31, 1991         MARCH 31, 1992
                   ----------------------  ----------------------  ----------------------
                               BY DOLLAR               BY DOLLAR               BY DOLLAR
                    BY NO.      AMOUNT      BY NO.      AMOUNT      BY NO.      AMOUNT
                   OF LOANS    OF LOANS    OF LOANS    OF LOANS    OF LOANS    OF LOANS
                   --------   -----------  --------   -----------  --------   -----------
<S>                <C>        <C>          <C>        <C>          <C>        <C>
                                       (DOLLAR AMOUNTS IN THOUSANDS)
 
Total Portfolio
 of Program
 Loans...........   99,196    $13,724,585   136,972   $21,489,014   150,112   $24,426,074
                   --------   -----------  --------   -----------  --------   -----------
                   --------   -----------  --------   -----------  --------   -----------
Period of
 Delinquency(1)
  30 to 59
  days...........    2,439    $   319,663     2,973   $   396,403     2,506   $   341,352
  60 to 89
  days...........      697         93,302       706       103,710       679        93,031
  90 days or
  more...........      902        145,245     1,268       220,943     1,290       229,873
                   --------   -----------  --------   -----------  --------   -----------
Total Delinquent
 Loans...........    4,038    $   558,210     4,947   $   721,056     4,475   $   664,256
                   --------   -----------  --------   -----------  --------   -----------
                   --------   -----------  --------   -----------  --------   -----------
Percent of
 Portfolio.......     4.07%          4.07%     3.61%         3.36%     2.98%         2.72%
</TABLE>
<TABLE>
<CAPTION>
                          AS OF                AS OF                AS OF
                    DECEMBER 31, 1990    DECEMBER 31, 1991     MARCH 31, 1992
                   -------------------  -------------------  -------------------
<S>                <C>                  <C>                  <C>
                                   (DOLLAR AMOUNTS IN THOUSANDS)
 
Foreclosures(2)... $      132,326       $      189,563       $      214,370
Foreclosure
 Ratio(3)........            0.96     %           0.88     %           0.88     %
 
<CAPTION>
 
                       YEAR ENDED           YEAR ENDED       THREE MONTHS ENDED
                    DECEMBER 31, 1990    DECEMBER 31, 1991     MARCH 31, 1992
                   -------------------  -------------------  -------------------
                                   (DOLLAR AMOUNTS IN THOUSANDS)
<S>                <C>                  <C>                  <C>
 
Net Gain
 (Loss)(4).......  $      (4,889)       $     (10,979)       $      (3,795)
Net Gain (Loss)
 Ratio(5)........          (0.04)     %         (0.05)     %         (0.02)     %
</TABLE>
 
- -------------
(1) The indicated periods of  delinquency are based on  the number of days  past
    due,  based on a 30-day month. No mortgage loan is considered delinquent for
    these purposes until one month has passed since its contractual due date.  A
    mortgage   loan  is   no  longer  considered   delinquent  once  foreclosure
    proceedings have commenced.
 
(2) Includes loans in the applicable portfolio for which foreclosure proceedings
    had been instituted or with respect  to which the related property had  been
    acquired as of the dates indicated.
 
(3) Foreclosures  as a percentage of total  loans in the applicable portfolio at
    the end of each period.
 
(4) Does not  include gain  or loss  with  respect to  loans in  the  applicable
    portfolio  for  which foreclosure  proceedings had  been instituted  but not
    completed as of  the dates indicated,  or for which  the related  properties
    have been acquired in foreclosure proceedings but not yet sold.
 
(5) Net  gain (loss) as a percentage of  total loans in the applicable portfolio
    at the end of each period.
 
                                      S-51
<PAGE>
                              FIXED PROGRAM LOANS
 
<TABLE>
<CAPTION>
                           AS OF                   AS OF                   AS OF
                     DECEMBER 31, 1990       DECEMBER 31, 1991         MARCH 31, 1992
                   ----------------------  ----------------------  ----------------------
                               BY DOLLAR               BY DOLLAR               BY DOLLAR
                    BY NO.      AMOUNT      BY NO.      AMOUNT      BY NO.      AMOUNT
                   OF LOANS    OF LOANS    OF LOANS    OF LOANS    OF LOANS    OF LOANS
                   --------   -----------  --------   -----------  --------   -----------
<S>                <C>        <C>          <C>        <C>          <C>        <C>
                                       (DOLLAR AMOUNTS IN THOUSANDS)
 
Total Portfolio
 of Fixed Program
 Loans...........   86,233    $11,687,518   120,333   $18,604,937   131,825   $21,221,873
                   --------   -----------  --------   -----------  --------   -----------
                   --------   -----------  --------   -----------  --------   -----------
Period of
 Delinquency(1)
  30 to 59
  days...........    1,823    $   227,468     2,379   $   311,415     1,991   $   268,380
  60 to 89
  days...........      456         52,748       534        72,567       523        68,151
  90 days or
  more...........      538         72,393       859       133,313       921       153,034
                   --------   -----------  --------   -----------  --------   -----------
Total Delinquent
 Loans...........    2,817    $   352,609     3,772   $   517,295     3,435   $   489,565
                   --------   -----------  --------   -----------  --------   -----------
                   --------   -----------  --------   -----------  --------   -----------
Percent of Fixed
 Program Loan
 Portfolio.......     3.27%          3.02%     3.13%         2.78%     2.61%         2.31%
</TABLE>
<TABLE>
<CAPTION>
                          AS OF                AS OF                AS OF
                    DECEMBER 31, 1990    DECEMBER 31, 1991     MARCH 31, 1992
                   -------------------  -------------------  -------------------
<S>                <C>                  <C>                  <C>
                                   (DOLLAR AMOUNTS IN THOUSANDS)
 
Foreclosures(2)... $      48,681        $      93,405        $      107,187
Foreclosure
 Ratio(3)........           0.42      %          0.50      %           0.51     %
 
<CAPTION>
 
                       YEAR ENDED           YEAR ENDED       THREE MONTHS ENDED
                    DECEMBER 31, 1990    DECEMBER 31, 1991     MARCH 31, 1992
                   -------------------  -------------------  -------------------
                                   (DOLLAR AMOUNTS IN THOUSANDS)
<S>                <C>                  <C>                  <C>
 
Net Gain
 (Loss)(4).......  $      (1,190      ) $      (3,936      ) $       (1,800     )
Net Gain (Loss)
 Ratio(5)........          (0.01      )%         (0.02      )%          (0.01     )%
</TABLE>
 
                                      S-52
<PAGE>
                   FIXED 15-YEAR NON-RELOCATION PROGRAM LOANS
 
<TABLE>
<CAPTION>
                           AS OF                  AS OF                   AS OF
                     DECEMBER 31, 1990      DECEMBER 31, 1991         MARCH 31, 1992
                   ---------------------  ----------------------  ----------------------
                              BY DOLLAR               BY DOLLAR               BY DOLLAR
                    BY NO.    AMOUNT OF    BY NO.     AMOUNT OF    BY NO.     AMOUNT OF
                   OF LOANS     LOANS     OF LOANS      LOANS     OF LOANS      LOANS
                   --------   ----------  --------   -----------  --------   -----------
<S>                <C>        <C>         <C>        <C>          <C>        <C>
                                       (DOLLAR AMOUNTS IN THOUSANDS)
Total Portfolio
 of
 Fixed 15-Year
 Non-relocation
 Program Loans...   12,273    $1,244,533   17,215    $ 2,148,635   22,476    $ 3,164,880
                   --------   ----------  --------   -----------  --------   -----------
                   --------   ----------  --------   -----------  --------   -----------
Period of
 Delinquency(1)
  30 to 59
  days...........      260    $   29,485      307    $    30,859      265    $    29,813
  60 to 89
  days...........       54         5,762       66          5,370       65          5,335
  90 days or
  more...........       55         7,061       87         13,480       95         13,800
                   --------   ----------  --------   -----------  --------   -----------
Total Delinquent
 Loans...........      369    $   42,308      460    $    49,709      425    $    48,948
                   --------   ----------  --------   -----------  --------   -----------
                   --------   ----------  --------   -----------  --------   -----------
Percent of
 Fixed 15-Year
 Non-relocation
 Program Loan
 Portfolio.......     3.01%         3.40%    2.67%          2.31%    1.89%          1.55%
</TABLE>
<TABLE>
<CAPTION>
                          AS OF                AS OF                AS OF
                    DECEMBER 31, 1990    DECEMBER 31, 1991     MARCH 31, 1992
                   -------------------  -------------------  -------------------
                                   (DOLLAR AMOUNTS IN THOUSANDS)
<S>                <C>                  <C>                  <C>
Foreclosures(2)... $       5,696        $      10,360        $       11,729
Foreclosure
 Ratio(3)........           0.46      %          0.48      %           0.37     %
 
<CAPTION>
 
                       YEAR ENDED           YEAR ENDED       THREE MONTHS ENDED
                    DECEMBER 31, 1990    DECEMBER 31, 1991     MARCH 31, 1992
                   -------------------  -------------------  -------------------
                                   (DOLLAR AMOUNTS IN THOUSANDS)
<S>                <C>                  <C>                  <C>
Net Gain
 (Loss)(4).......  $       (459)        $       (122)        $         (15)
Net Gain (Loss)
 Ratio(5)........         (0.04)      %        (0.01)      %         (0.00)     %
</TABLE>
 
- -------------
(1) The indicated periods of  delinquency are based on  the number of days  past
    due,  based on a 30-day month. No mortgage loan is considered delinquent for
    these purposes until one month has passed since its contractual due date.  A
    mortgage   loan  is   no  longer  considered   delinquent  once  foreclosure
    proceedings have commenced.
 
(2) Includes loans in the applicable portfolio for which foreclosure proceedings
    had been instituted or with respect  to which the related property had  been
    acquired as of the dates indicated.
 
(3) Foreclosures  as a percentage of total  loans in the applicable portfolio at
    the end of each period.
 
(4) Does not  include gain  or loss  with  respect to  loans in  the  applicable
    portfolio  for  which foreclosure  proceedings had  been instituted  but not
    completed as of  the dates indicated,  or for which  the related  properties
    have been acquired in foreclosure proceedings but not yet sold.
 
(5) Net  gain (loss) as a percentage of  total loans in the applicable portfolio
    at the end of each period.
 
    The likelihood that a mortgagor will become delinquent in the payment of his
or her mortgage loan, the rate of any subsequent foreclosures, and the  severity
of any loan loss experience, may be affected by a number of factors related to a
borrower's  personal circumstances, including, but  not limited to, unemployment
or change  in  employment  (or  in  the  case  of  self-employed  mortgagors  or
mortgagors  relying  on  commission  income,  fluctuations  in  income), marital
separation and  the mortgagor's  equity in  the related  mortgaged property.  In
addition,  delinquency, foreclosure and loan loss experience may be sensitive to
adverse economic  conditions,  either  nationally  or  regionally,  may  exhibit
seasonal  variations and may  be influenced by  the level of  interest rates and
servicing  decisions  on  the  applicable  mortgage  loans.  Regional   economic
conditions  (including  declining real  estate  values) may  particularly affect
delinquency, foreclosure  and loan  loss  experience on  mortgage loans  to  the
extent  that mortgaged properties are  concentrated in certain geographic areas.
The Seller believes that the changes in the
 
                                      S-53
<PAGE>
delinquency, foreclosure and loan loss experience of PHMC's respective servicing
portfolios during  the  periods  set  forth  in  the  preceding  tables  may  be
attributable  to factors such  as those described above,  although the Seller is
unable to assess to what extent these  changes are the result of any  particular
factor  or a combination of factors.  The delinquency, foreclosure and loan loss
experience  on  the  Mortgage  Loans  contained  in  the  Trust  Estate  may  be
particularly   affected  to  the  extent   that  the  Mortgaged  Properties  are
concentrated in areas which experience adverse economic conditions or  declining
real estate values. See "Description of the Mortgage Loans."
 
                      PREPAYMENT AND YIELD CONSIDERATIONS
 
    The  rate  of distributions  in reduction  of the  principal balance  of any
Subclass of the Class A Certificates and the Class M Certificates, the aggregate
amount of distributions  on any  Subclass of the  Class A  Certificates and  the
Class  M Certificates and the  yield to maturity of any  Subclass of the Class A
Certificates and the  Class M Certificates  purchased at a  discount or  premium
will  be directly related to  the rate of payments  of principal on the Mortgage
Loans in  the Trust  Estate and  the  amount and  timing of  mortgagor  defaults
resulting  in Realized  Losses. The rate  of principal payments  on the Mortgage
Loans will in  turn be affected  by the amortization  schedules of the  Mortgage
Loans,  the  rate of  principal prepayments  (including partial  prepayments and
those  resulting  from  refinancing)  thereon  by  mortgagors,  liquidations  of
defaulted  Mortgage  Loans, repurchases  by the  Seller of  Mortgage Loans  as a
result of defective documentation or breaches of representations and warranties,
optional repurchase  by the  Seller  of defaulted  Mortgage Loans  and  optional
purchase  by the Servicer  of all of  the Mortgage Loans  in connection with the
termination  of   the   Trust  Estate.   See   "Description  of   the   Mortgage
Loans--Optional  Repurchase  of  Defaulted  Mortgage  Loans"  and  "Pooling  and
Servicing   Agreement--Optional    Termination"    herein   and    "The    Trust
Estates--Mortgage   Loans--Assignment  of   Mortgage  Loans   to  the  Trustee,"
"--Optional Repurchases" and "The Pooling and Servicing  Agreement--Termination;
Purchase  of  Mortgage Loans"  in the  Prospectus.  Mortgagors are  permitted to
prepay the Mortgage Loans, in whole or in part, at any time without penalty.  As
described   under   "Description  of   the   Certificates--Principal  (Including
Prepayments)"  herein,  all  or  a  disproportionate  percentage  of   principal
prepayments  on the  Mortgage Loans  (including liquidations  and repurchases of
Mortgage Loans) will be distributed to the holders of Class A Certificates  then
entitled  to  distributions  in  respect  of  principal  during  the  nine years
beginning on the first  Distribution Date. Prepayments  (which, as used  herein,
include  all unscheduled payments of principal, including payments as the result
of liquidations, purchases and repurchases) of  the Mortgage Loans in the  Trust
Estate  will  result in  distributions  to Certificateholders  then  entitled to
distributions in  respect  of principal  of  amounts which  would  otherwise  be
distributed  over the remaining terms of such  Mortgage Loans. Since the rate of
prepayment on the Mortgage Loans will depend  on future events and a variety  of
factors  (as described more fully below  and in the Prospectus under "Prepayment
and Yield Considerations"), no  assurance can be  given as to  such rate or  the
rate  of principal payments on  any Subclass of the  Class A Certificates or the
Class M Certificates or the aggregate amount of distributions on any Subclass of
Class A Certificates or the Class M Certificates.
 
    The rate of payments (including prepayments)  on pools of mortgage loans  is
influenced  by a variety  of economic, geographic, social  and other factors. If
prevailing rates  for  similar  mortgage  loans  fall  significantly  below  the
Mortgage  Interest Rates  on the  Mortgage Loans,  the rate  of prepayment would
generally be  expected to  increase. Conversely,  if interest  rates on  similar
mortgage  loans  rise significantly  above the  Mortgage  Interest Rates  on the
Mortgage Loans, the rate of prepayment would generally be expected to decrease.
 
    Other factors  affecting prepayment  of mortgage  loans include  changes  in
mortgagors'  housing  needs,  job transfers,  unemployment  or, in  the  case of
self-employed mortgagors or mortgagors relying on commission income, substantial
fluctuations in income, significant declines  in real estate values and  adverse
economic   conditions  either  generally  or  in  particular  geographic  areas,
mortgagors' equity in the Mortgaged Properties and servicing decisions. In  this
regard,  mortgagors of relocation mortgage loans  are thought by some within the
mortgage industry to be  more likely to be  transferred by their employers  than
mortgagors  generally. There can be no assurance  as to the likelihood of future
transfers
 
                                      S-54
<PAGE>
of mortgagors of Relocation Mortgage Loans  or as to such mortgagors'  continued
employment  with  the same  employers  by which  they  were employed  when their
mortgage loans were  originated. No  representation is made  as to  the rate  of
prepayment  on the Relocation  Mortgage Loans. In addition,  all of the Mortgage
Loans contain due-on-sale  clauses which  will generally be  exercised upon  the
sale of the related Mortgaged Properties. Consequently, acceleration of mortgage
payments  as a result of  any such sale will affect  the level of prepayments on
the Mortgage Loans. The extent to which defaulted Mortgage Loans are assumed  by
transferees  of the  related Mortgaged Properties  will also affect  the rate of
principal payments. The rate of prepayment and, therefore, the yield to maturity
of the Class A and Class M Certificates will be affected by the extent to  which
(i)  the Seller elects to repurchase, rather than substitute for, Mortgage Loans
which are found by the Trustee  to have defective documentation or with  respect
to  which  the Seller  has breached  a  representation or  warranty or  (ii) the
Servicer elects  to encourage  the refinancing  of any  defaulted Mortgage  Loan
rather  than  to  permit  an  assumption  thereof  by  a  mortgagor  meeting the
Servicer's underwriting  guidelines.  See  "Servicing of  the  Mortgage  Loans--
Enforcement  of Due-on-Sale Clauses; Realization  Upon Defaulted Mortgage Loans"
in the Prospectus. There can  be no certainty as to  the rate of prepayments  on
the  Mortgage Loans  during any period  or over  the life of  the Series 1992-13
Certificates. See "Prepayment and Yield Considerations" in the Prospectus.
 
    The timing of changes in  the rate of prepayment  on the Mortgage Loans  may
significantly affect the actual yield to maturity experienced by an investor who
purchases  a Class A or Class  M Certificate at a price  other than par, even if
the average rate of principal payments experienced over time is consistent  with
such  investor's expectation. In general, the  earlier a prepayment of principal
on the underlying  Mortgage Loans,  the greater  the effect  on such  investor's
yield to maturity. As a result, the effect on such investor's yield 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 Class A and
Class M Certificates would  not be fully offset  by a subsequent like  reduction
(or increase) in the rate of principal payments.
 
    The  yield to maturity  on the Class  M Certificates will  be more sensitive
than the Class A Certificates  to losses due to  defaults on the Mortgage  Loans
(and the timing thereof), to the extent not covered by the Class B Certificates,
because  the  entire amount  of such  losses will  be allocable  to the  Class M
Certificates prior to  the Class  A Certificates, except  as otherwise  provided
herein.  To  the  extent  not covered  by  Periodic  Advances,  delinquencies on
Mortgage Loans  may  also have  a  relatively greater  effect  on the  yield  to
investors  in  the  Class  M Certificates.  Amounts  otherwise  distributable to
holders of  the Class  M Certificates  will  be made  available to  protect  the
holders  of the Class A Certificates  against interruptions in distributions due
to certain  mortgagor  delinquencies.  Such delinquencies,  to  the  extent  not
covered  by the Class B Certificates, even if subsequently cured, may affect the
timing of the receipt of distributions  by the holders of Class M  Certificates,
because  the entire amount of those delinquencies  would be borne by the Class M
Certificates prior to the Class A Certificates.
 
    No representation  is made  as to  the  rate of  principal payments  on  the
Mortgage  Loans  or as  to the  yield to  maturity  of any  Subclass of  Class A
Certificates or  the Class  M Certificates.  An  investor is  urged to  make  an
investment  decision with respect to any Subclass of Class A Certificates or the
Class M Certificates based on the anticipated yield to maturity to such Subclass
of Class A Certificates or the Class M Certificates resulting from its  purchase
price  and such  investor's own  determination as  to anticipated  Mortgage Loan
prepayment rates under a variety of scenarios. The extent to which any  Subclass
of  Class A Certificates or the Class M Certificates are purchased at a discount
or a premium, the  degree to which  the timing of payments  on such Subclass  or
Class  is sensitive to prepayments will determine  the extent to which the yield
to maturity of such Subclass  or Class may vary  from the anticipated yield.  An
investor  should carefully consider the associated risks, including, in the case
of any Class A or Class M Certificates purchased at a discount, the risk that  a
slower  than anticipated rate of principal  payments on the Mortgage Loans could
result in an actual yield  to such investor that  is lower than the  anticipated
yield  and, in the  case of any Class  A or Class M  Certificates purchased at a
premium, the risk  that a  faster than  anticipated rate  of principal  payments
could  result  in  an actual  yield  to such  investor  that is  lower  than the
anticipated yield.
 
                                      S-55
<PAGE>
    An investor should consider the risk that rapid rates of prepayments on  the
Mortgage Loans, and therefore of amounts distributable in reduction of principal
balance of the Class A or Class M Certificates, may coincide with periods of low
prevailing  interest rates. During such periods, the effective interest rates on
securities in which an  investor may choose to  reinvest amounts distributed  in
reduction  of  the principal  balance  of such  investor's  Class A  or  Class M
Certificate may  be lower  than the  applicable Pass-Through  Rate.  Conversely,
slower  rates of  prepayments on  the Mortgage  Loans, and  therefore of amounts
distributable in  reduction of  principal balance  of  the Class  A or  Class  M
Certificates,  may  coincide with  periods  of high  prevailing  interest rates.
During such  periods, the  amount  of principal  distributions available  to  an
investor  for  reinvestment  at  such  high  prevailing  interest  rates  may be
relatively small.
 
    As indicated under "Federal Income Tax Considerations" herein, the Class A-R
Certificateholder's REMIC  taxable income  and the  tax liability  thereon  will
exceed cash distributions to such holder during certain periods. There can be no
assurance  as to the amount  by which such taxable  income or such tax liability
will exceed cash distributions  in respect of the  Class A-R Certificate  during
any  such period and  no representation is  made with respect  thereto under any
principal prepayment scenario or otherwise. DUE TO THE SPECIAL TAX TREATMENT  OF
RESIDUAL  INTERESTS, THE  AFTER-TAX RETURN OF  THE CLASS A-R  CERTIFICATE MAY BE
SIGNIFICANTLY LOWER THAN  WOULD BE THE  CASE IF THE  CLASS A-R CERTIFICATE  WERE
TAXED AS A DEBT INSTRUMENT.
 
    As  referred to herein, the  weighted average life of  a Subclass of Class A
Certificates and the Class M Certificates  refers to the average amount of  time
that  will elapse from the date of issuance of such Subclass or Class until each
dollar in  reduction of  the principal  balance  of such  Subclass or  Class  is
distributed  to the investor. The weighted average  life of each Subclass of the
Class A Certificates and the Class  M Certificates will be influenced by,  among
other  things, the rate and timing of  principal payments on the Mortgage Loans,
which may be in the form of scheduled amortization or prepayments.
 
    Prepayments on mortgage loans are commonly measured relative to a prepayment
standard or model. The  model used in this  Prospectus Supplement, the  Standard
Prepayment  Assumption ("SPA"),  represents an  assumed rate  of prepayment each
month relative  to the  then outstanding  principal  balance of  a pool  of  new
mortgage  loans. A prepayment assumption of 100% SPA assumes constant prepayment
rates of  0.2% per  annum of  the  then outstanding  principal balance  of  such
mortgage  loans in  the first  month of the  life of  the mortgage  loans and an
additional 0.2% per annum  in each month thereafter  until the thirtieth  month.
Beginning in the thirtieth month and in each month thereafter during the life of
the  mortgage loans, 100% SPA assumes a constant prepayment rate of 6% per annum
each month. As used in the table below, "0% SPA" assumes prepayment rates  equal
to  0%  of  SPA,  i.e.,  no  prepayments.  Correspondingly,  "75%  SPA"  assumes
prepayment rates equal to 75% of SPA, and so forth. SPA DOES NOT PURPORT TO BE A
HISTORICAL  DESCRIPTION  OF  PREPAYMENT  EXPERIENCE  OR  A  PREDICTION  OF   THE
ANTICIPATED  RATE OF  PREPAYMENT OF  ANY POOL  OF MORTGAGE  LOANS, INCLUDING THE
MORTGAGE LOANS.
 
    The tables  set  forth  below  have  been  prepared  on  the  basis  of  the
characteristics  of the Mortgage Loans  that are expected to  be included in the
Trust Estate, as described above under "Description of the Mortgage Loans."  The
tables  assume, among other things, that (i) the scheduled payment in each month
for each Mortgage Loan has been based on its outstanding balance as of the first
day of the month preceding the month of such payment, its Mortgage Interest Rate
and its remaining term to stated maturity, so that such scheduled payments would
amortize the  remaining balance  by  its stated  maturity date,  (ii)  scheduled
monthly  payments of principal and interest on the Mortgage Loans will be timely
received on the first day of each  month (with no defaults), commencing June  1,
1992, (iii) the Seller does not repurchase any Mortgage Loan, as described under
"The Trust Estates--Mortgage Loans" in the Prospectus, and the Servicer does not
exercise  its  option  to  purchase  the  Mortgage  Loans  and  thereby  cause a
termination of  the Trust  Estate, (iv)  principal prepayments  on the  Mortgage
Loans  will be received on the last day of each month commencing May 31, 1992 at
the respective constant percentages of SPA set forth in the tables and there are
no Prepayment Interest  Shortfalls and (v)  each Mortgage Loan  has an  original
term to maturity of 15 years. IT IS HIGHLY UNLIKELY THAT THE MORTGAGE LOANS WILL
PREPAY AT ANY CONSTANT RATE OR THAT ALL OF THE MORTGAGE LOANS WILL PREPAY AT THE
SAME RATE. In addition, there may
 
                                      S-56
<PAGE>
be  differences  between the  characteristics of  the mortgage  loans ultimately
included in the Trust  Estate and the  Mortgage Loans which  are expected to  be
included, as described herein. Any difference may have an effect upon the actual
percentages  of initial Class A Subclass  Principal Balance of the Subclasses of
Class A Certificates and initial principal  balance of the Class M  Certificates
outstanding,  the actual  weighted average  lives of  the Subclasses  of Class A
Certificates and the  Class M Certificates  and the  date on which  the Class  A
Subclass  Principal  Balance of  any Subclass  of Class  A Certificates  and the
principal balance of the Class M Certificates are reduced to zero.
 
    Based upon  the foregoing  assumptions, the  following tables  indicate  the
weighted  average life of each Subclass of  Offered Certificates and the Class M
Certificates, and set  forth the  percentages of  the initial  Class A  Subclass
Principal  Balance  of each  such  Subclass, and,  in the  case  of the  Class M
Certificates, of the initial principal balance of the Class M Certificates  that
would  be  outstanding  after  each  of  the  dates  shown  at  various constant
percentages of SPA.
 
                                      S-57
<PAGE>
            PERCENTAGE OF INITIAL CLASS A SUBCLASS PRINCIPAL BALANCE
                 AND CLASS M PRINCIPAL BALANCE OUTSTANDING FOR:
 
<TABLE>
<CAPTION>
                               CLASS A-1                     CLASS A-2                     CLASS A-3
                          CERTIFICATES AT THE           CERTIFICATES AT THE           CERTIFICATES AT THE
                         FOLLOWING PERCENTAGES         FOLLOWING PERCENTAGES         FOLLOWING PERCENTAGES
                                OF SPA                        OF SPA                        OF SPA
    DISTRIBUTION     ----------------------------- ----------------------------- -----------------------------
        DATE          0%  75%  110% 225% 350% 500%  0%  75%  110% 225% 350% 500%  0%  75%  110% 225% 350% 500%
- -------------------- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ----
<S>                  <C>  <C>  <C>  <C>  <C>  <C>  <C>  <C>  <C>  <C>  <C>  <C>  <C>  <C>  <C>  <C>  <C>  <C>
Initial.............
                     100  100  100  100  100  100
                                                   100  100  100  100  100  100
                                                                                 100  100  100  100  100  100
May 1993............
                      76   68   64   64   64   64
                                                   100  100  100  100  100  100
                                                                                 100  100  100  100  100  100
May 1994............
                      50   23   11   11   11   11
                                                   100  100  100  100  100  100
                                                                                 100  100  100  100  100  100
May 1995............
                      21    0    0    0    0    0
                                                   100   12    0    0    0    0
                                                                                 100  100   79   79   79   59
May 1996............
                       0    0    0    0    0    0
                                                    71    0    0    0    0    0
                                                                                 100   47   13   13   13    0
May 1997............
                       0    0    0    0    0    0
                                                     0    0    0    0    0    0
                                                                                  89    0    0    0    0    0
May 1998............
                       0    0    0    0    0    0
                                                     0    0    0    0    0    0
                                                                                  48    0    0    0    0    0
May 1999............
                       0    0    0    0    0    0
                                                     0    0    0    0    0    0
                                                                                   4    0    0    0    0    0
May 2000............
                       0    0    0    0    0    0
                                                     0    0    0    0    0    0
                                                                                   0    0    0    0    0    0
May 2001............
                       0    0    0    0    0    0
                                                     0    0    0    0    0    0
                                                                                   0    0    0    0    0    0
May 2002............
                       0    0    0    0    0    0
                                                     0    0    0    0    0    0
                                                                                   0    0    0    0    0    0
May 2003............
                       0    0    0    0    0    0
                                                     0    0    0    0    0    0
                                                                                   0    0    0    0    0    0
May 2004............
                       0    0    0    0    0    0
                                                     0    0    0    0    0    0
                                                                                   0    0    0    0    0    0
May 2005............
                       0    0    0    0    0    0
                                                     0    0    0    0    0    0
                                                                                   0    0    0    0    0    0
May 2006............
                       0    0    0    0    0    0
                                                     0    0    0    0    0    0
                                                                                   0    0    0    0    0    0
May 2007............
                       0    0    0    0    0    0
                                                     0    0    0    0    0    0
                                                                                   0    0    0    0    0    0
Weighted Average
  Life (years)(1)... 2.03 1.46 1.32 1.32 1.32 1.32 4.30 2.85 2.53 2.53 2.53 2.53 6.03 4.05 3.53 3.53 3.53 3.17
</TABLE>
 
<TABLE>
<CAPTION>
                               CLASS A-4                         CLASS A-5                        CLASS A-6
                          CERTIFICATES AT THE               CERTIFICATES AT THE              CERTIFICATES AT THE
                         FOLLOWING PERCENTAGES             FOLLOWING PERCENTAGES            FOLLOWING PERCENTAGES
                                 OF SPA                           OF SPA                           OF SPA
   DISTRIBUTION    ---------------------------------- ------------------------------- ---------------------------------
       DATE         0%    75%  110%  225%  350%  500%  0%    75%  110% 225% 350% 500%  0%    75%  110%  225%  350% 500%
- ------------------ ----- ----- ----- ----- ----- ---- ----- ----- ---- ---- ---- ---- ----- ----- ----- ----- ---- ----
<S>                <C>   <C>   <C>   <C>   <C>   <C>  <C>   <C>   <C>  <C>  <C>  <C>  <C>   <C>   <C>   <C>   <C>  <C>
Initial...........
                    100   100   100   100   100  100
                                                       100   100  100  100  100  100
                                                                                       100   100   100   100  100  100
May 1993..........
                    100   100   100   100   100  100
                                                       100   100  100  100  100  100
                                                                                       100   100   100   100  100  100
May 1994..........
                    100   100   100   100   100  100
                                                       100   100  100  100  100  100
                                                                                       100   100   100   100  100  100
May 1995..........
                    100   100   100   100   100  100
                                                       100   100  100  100  100  100
                                                                                       100   100   100   100  100  100
May 1996..........
                    100   100   100   100   100    0
                                                       100   100  100  100  100   77
                                                                                       100   100   100   100  100  100
May 1997..........
                    100    72     0     0     0    0
                                                       100   100   83   83   83    7
                                                                                       100   100   100   100  100  100
May 1998..........
                    100     0     0     0     0    0
                                                       100    71   31   31   31    0
                                                                                       100   100   100   100  100   45
May 1999..........
                    100     0     0     0     0    0
                                                       100    23    0    0    0    0
                                                                                       100   100    85    85   85    1
May 2000..........
                      0     0     0     0     0    0
                                                        88     0    0    0    0    0
                                                                                       100    65    38    38   38    0
May 2001..........
                      0     0     0     0     0    0
                                                        41     0    0    0    0    0
                                                                                       100     4     4     4    4    0
May 2002..........
                      0     0     0     0     0    0
                                                         0     0    0    0    0    0
                                                                                        85     0     0     0    0    0
May 2003..........
                      0     0     0     0     0    0
                                                         0     0    0    0    0    0
                                                                                         2     0     0     0    0    0
May 2004..........
                      0     0     0     0     0    0
                                                         0     0    0    0    0    0
                                                                                         0     0     0     0    0    0
May 2005..........
                      0     0     0     0     0    0
                                                         0     0    0    0    0    0
                                                                                         0     0     0     0    0    0
May 2006..........
                      0     0     0     0     0    0
                                                         0     0    0    0    0    0
                                                                                         0     0     0     0    0    0
May 2007..........
                      0     0     0     0     0    0
                                                         0     0    0    0    0    0
                                                                                         0     0     0     0    0    0
Weighted Average
  Life
  (years)(1)...... 7.50  5.21  4.53  4.53  4.53  3.69 8.89  6.53  5.73 5.73 5.73 4.47 10.51 8.32  7.88  7.88  7.88 6.05
</TABLE>
 
- ------------------
(1) The weighted average  life of an  Offered Certificate is  determined by  (i)
    multiplying  the  amount  of  each distribution  in  reduction  of principal
    balance by  the number  of  years from  the date  of  the issuance  of  such
    Certificate  to the related  Distribution Date, (ii)  adding the results and
    (iii) dividing  the  sum by  the  aggregate distributions  in  reduction  of
    principal balance referred to in clause (i).
 
                                      S-58
<PAGE>
 
<TABLE>
<CAPTION>
                          CLASS A-7                           CLASS A-8                           CLASS A-9
                     CERTIFICATES AT THE                 CERTIFICATES AT THE                 CERTIFICATES AT THE
                    FOLLOWING PERCENTAGES               FOLLOWING PERCENTAGES               FOLLOWING PERCENTAGES
                           OF SPA                              OF SPA                              OF SPA
DISTRIBUTION ----------------------------------- ----------------------------------- -----------------------------------
    DATE      0%    75%  110%  225%  350%  500%   0%    75%  110%  225%  350%  500%   0%    75%  110%  225%  350%  500%
- ------------ ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- -----
<S>          <C>   <C>   <C>   <C>   <C>   <C>   <C>   <C>   <C>   <C>   <C>   <C>   <C>   <C>   <C>   <C>   <C>   <C>
Initial.....
              100   100   100   100   100   100
                                                  100   100   100   100   100   100
                                                                                      100   100   100   100   100   100
May 1993....
              108   108   108   108   108   108
                                                  100   100   100    91    81    68
                                                                                      100   100   100   100   100   100
May 1994....
              116   116   116   116   116   116
                                                  100   100   100    71    40     3
                                                                                      100   100   100   100   100   100
May 1995....
              125   125   125   125   125   125
                                                  100   100   100    48     0     0
                                                                                      100   100   100   100    90     0
May 1996....
              135   135   135   135   135   135
                                                  100   100   100    31     0     0
                                                                                      100   100   100   100    33     0
May 1997....
              145   145   145   145   145   145
                                                  100   100   100    22     0     0
                                                                                      100   100   100   100     5     0
May 1998....
              157   157   157   157   157   157
                                                  100   100   100    18     0     0
                                                                                      100   100   100   100     1     0
May 1999....
              169   169   169   169   169   169
                                                  100   100    93    12     0     0
                                                                                      100   100   100   100     1     0
May 2000....
              182   182   182   182   182   101
                                                  100   100    82     4     0     0
                                                                                      100   100   100   100     1     0
May 2001....
              196   196   196   196   196    59
                                                  100    96    66     0     0     0
                                                                                      100   100   100    91     1     0
May 2002....
              211   141   141   141   141    36
                                                  100    76    48     0     0     0
                                                                                      100   100   100    73     1     0
May 2003....
              228    92    92    92    92    21
                                                  100    53    29     0     0     0
                                                                                      100   100   100    55     1     0
May 2004....
               55    55    55    55    55    11
                                                   86    29    10     0     0     0
                                                                                      100   100   100    39     1     0
May 2005....
               28    28    28    28    28     5
                                                   44     3     0     0     0     0
                                                                                      100   100    78    24     1     0
May 2006....
               10    10    10    10    10     2
                                                    0     0     0     0     0     0
                                                                                       95    50    36    11     1     0
May 2007....
                0     0     0     0     0     0
                                                    0     0     0     0     0     0
                                                                                        0     0     0     0     0     0
Weighted
  Average
  Life
  (years)(1)... 11.88 11.23 11.23 11.23 11.23 8.95 12.94 11.16 9.86 3.54 1.79  1.35  14.50 14.09 13.77 11.53 3.91  2.46
</TABLE>
 
<TABLE>
<CAPTION>
                          CLASS A-R                            CLASS M
                     CERTIFICATE AT THE                  CERTIFICATES AT THE
                    FOLLOWING PERCENTAGES               FOLLOWING PERCENTAGES
                           OF SPA                              OF SPA
DISTRIBUTION ----------------------------------- -----------------------------------
    DATE      0%    75%  110%  225%  350%  500%   0%    75%  110%  225%  350%  500%
- ------------ ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- ----- -----
<S>          <C>   <C>   <C>   <C>   <C>   <C>   <C>   <C>   <C>   <C>   <C>   <C>   <C>  <C>  <C>  <C>  <C>  <C>
Initial.....
              100   100   100   100   100   100
                                                  100   100   100   100   100   100
May 1993....
              100   100   100   100   100   100
                                                   96    96    96    96    96    96
May 1994....
              100   100   100   100   100   100
                                                   93    93    93    93    93    93
May 1995....
              100   100   100   100   100     0
                                                   88    88    88    88    88    88
May 1996....
              100   100   100   100   100     0
                                                   84    84    84    84    84    84
May 1997....
              100   100   100   100   100     0
                                                   79    79    79    79    79    79
May 1998....
              100   100   100   100   100     0
                                                   74    73    72    71    69    66
May 1999....
              100   100   100   100   100     0
                                                   68    66    65    61    58    53
May 2000....
              100   100   100   100   100     0
                                                   61    58    56    51    45    39
May 2001....
              100   100   100   100   100     0
                                                   55    49    47    40    33    26
May 2002....
              100   100   100   100   100     0
                                                   47    41    38    30    23    16
May 2003....
              100   100   100   100   100     0
                                                   39    32    29    21    15     9
May 2004....
              100   100   100   100   100     0
                                                   30    24    21    14     9     5
May 2005....
              100   100   100   100   100     0
                                                   20    15    13     8     5     2
May 2006....
              100   100   100   100   100     0
                                                   10     7     6     3     2     1
May 2007....
                0     0     0     0     0     0
                                                    0     0     0     0     0     0
Weighted
  Average
  Life
  (years)(1)... 15.05 15.05 15.05 15.05 15.05 2.80 9.02 8.63 8.47  7.99  7.56  7.14
</TABLE>
 
- ------------------
(1) The  weighted average  life of an  Offered Certificate is  determined by (i)
    multiplying the  amount  of  each distribution  in  reduction  of  principal
    balance  by  the number  of  years from  the date  of  the issuance  of such
    Certificate to the related  Distribution Date, (ii)  adding the results  and
    (iii)  dividing  the  sum by  the  aggregate distributions  in  reduction of
    principal balance referred to in clause (i).
 
                                      S-59
<PAGE>
    Interest on Mortgage  Loans prepaid  in full, Liquidated  Loans and  partial
principal  prepayments (to the extent not applied on a Due Date) is accrued only
to the date of  prepayment or liquidation,  although any corresponding  interest
shortfall  with respect to  prepayments in full (but  not partial prepayments or
liquidations) in the month of  prepayment will be offset,  to the extent of  the
aggregate  of  the  Servicing  Fees  relating  to  mortgagor  payments  or other
recoveries distributed on the related Distribution Date. Interest accrued on the
Class A and Class M Certificates will  be reduced by the amount of any  interest
portions  of Realized Losses  allocated to such  Certificates as described under
"Description of the  Certificates--Interest" herein.  The yield on  the Class  A
Certificates  and the Class M Certificates will be less than the yield otherwise
produced by their  respective Pass-Through  Rates and  the prices  at which  the
Class  A  and Class  M  Certificates are  purchased  because the  interest which
accrues on the Mortgage Loans  during each month will  not be passed through  to
Certificateholders  until the 25th  day of the  month following the  end of such
month (or if such 25th day is  not a business day, the following business  day).
See "Description of the Certificates--Interest" herein and "Prepayment and Yield
Considerations" in the Prospectus.
 
                        POOLING AND SERVICING AGREEMENT
 
GENERAL
 
    The  Series 1992-13  Certificates will be  issued pursuant to  a Pooling and
Servicing Agreement to be dated as of the date of initial issuance of the Series
1992-13 Certificates (the "Pooling and  Servicing Agreement") among the  Seller,
the  Servicer and the Trustee. Reference is made to the Prospectus for important
additional information regarding  the terms  and conditions of  the Pooling  and
Servicing Agreement and the Series 1992-13 Certificates. See "Description of the
Certificates,"  "Servicing of the Mortgage Loans" and "The Pooling and Servicing
Agreement" in the Prospectus. Distributions  (other than the final  distribution
in  retirement of the Class  A Certificates of each Subclass  and of the Class M
Certificates) will be made by check mailed to the address of the person entitled
thereto as it appears on the Certificate Register. However, with respect to  any
holder  of  an  Offered Certificate  evidencing  at least  a  $5,000,000 initial
principal balance, distributions will be made  on the Distribution Date by  wire
transfer  in immediately  available funds,  provided that  the Servicer,  or the
paying agent acting on  behalf of the Servicer,  shall have been furnished  with
appropriate  wiring instructions not less than  seven business days prior to the
related Distribution Date. The final distribution in respect of each Class A and
Class M Certificate will  be made only upon  presentation and surrender of  such
Class  A or Class M Certificate at the office or agency appointed by the Trustee
specified in  the notice  of  final distribution  with  respect to  the  related
Subclass or Class.
 
    Unless  Definitive Certificates are issued  as described above, the Servicer
and the Trustee will treat DTC as the Holder of the Book-Entry Certificates  for
all  purposes, including  making distributions  thereon and  taking actions with
respect thereto. DTC will make book-entry transfers among its participants  with
respect  to the Book-Entry  Certificates; it will  also receive distributions on
the Book-Entry Certificates from the  Trustee and transmit them to  participants
for distribution to Beneficial Owners or their nominees.
 
VOTING
 
    With  respect  to  any provisions  of  the Pooling  and  Servicing Agreement
providing for  the action,  consent or  approval of  the holders  of all  Series
1992-13  Certificates evidencing specified Voting Interests in the Trust Estate,
the holders of  the Class A  Certificates will collectively  be entitled to  the
then  applicable Class A Percentage, and the holders of the Class M Certificates
will collectively be entitled to the then applicable percentage of the aggregate
Voting Interest  represented  by all  Series  1992-13 Certificates  obtained  by
dividing  the then-outstanding Class M Principal Balance by the sum of the then-
outstanding Class A  Principal Balance, Class  M Principal Balance  and Class  B
Principal  Balance and the holders of the Class B Certificates will collectively
be entitled to the balance of  the aggregate Voting Interest represented by  all
Series  1992-13  Certificates. The  aggregate Voting  Interests  of the  Class A
Certificates other than the Class A-10 Certificates, on any date will be 97%  of
the  Class A Percentage on such date. The aggregate Voting Interest of the Class
A-10 Certificates on any date will be 3% of the
 
                                      S-60
<PAGE>
Class A Percentage on such date. The aggregate Voting Interests of each Subclass
of Class A Certificates other than the Class A-10 Certificates on any date  will
be  equal to the product of  (a) 97% of the Class  A Percentage on such date and
(b) the fraction obtained by dividing the Class A Subclass Principal Balance  of
such  Subclass on such date by the  aggregate Class A Subclass Principal Balance
of the Class A Certificates other than the Class A-10 Certificates on such date.
The aggregate Voting Interests of the Class  M Certificates on any date will  be
100%  of the  percentage described  above for the  Class M  Certificates on such
date. Each Certificateholder of a Class or Subclass will have a Voting  Interest
equal  to the product of the Voting Interest  to which such Class or Subclass is
collectively entitled  and the  Percentage Interest  in such  Class or  Subclass
represented by such holder's Certificates. With respect to any provisions of the
Pooling  and Servicing  Agreement providing for  action, consent  or approval of
each Class or  Subclass of Certificates  or specified Classes  or Subclasses  of
Certificates,  each Certificateholder of a Subclass  will have a Voting Interest
in such Subclass equal  to such holder's Percentage  Interest in such  Subclass.
Unless  Definitive Certificates are issued as described above, Beneficial Owners
of Book-Entry  Certificates  may  exercise  their  voting  rights  only  through
Participants.
 
TRUSTEE
 
    The Trustee for the Series 1992-13 Certificates will be First Trust National
Association,  a national banking association. The  Corporate Trust Office of the
Trustee  is  located  at  First  Bank  Place  East,  220  South  Sixth   Street,
Minneapolis,  Minnesota 55402.  See "The  Pooling and  Servicing Agreement-- The
Trustee" in the Prospectus.
 
SERVICING COMPENSATION AND PAYMENT OF EXPENSES
 
    The Servicing Fee paid to the Servicer with respect to the servicing of each
Mortgage Loan  included  in  the  Trust Estate  underlying  the  Series  1992-13
Certificates  and administrative services provided by it will be 0.25% per annum
of the  outstanding principal  balance  of each  such  Mortgage Loan.  No  Fixed
Retained  Yield (as defined in the Prospectus)  will be retained with respect to
any of the Mortgage Loans. See "Servicing of the Mortgage Loans--Fixed  Retained
Yield,  Servicing Compensation  and Payment of  Expenses" in  the Prospectus for
information regarding other possible compensation to the Servicer. The  Servicer
will  pay all routine expenses incurred  in connection with its responsibilities
under the  Pooling  and  Servicing  Agreement,  subject  to  certain  rights  of
reimbursement  as  described in  the Prospectus.  The  servicing fees  and other
expenses of  the  REMIC  will be  allocated  to  the holder  of  the  Class  A-R
Certificate  who is an individual, estate, or trust (whether such Certificate is
held directly  or through  certain pass-through  entities) as  additional  gross
income  without a corresponding distribution of  cash, and any such investor (or
its owners, in the case of a pass-through entity) may be limited in its  ability
to  deduct such expenses for regular tax purposes  and may not be able to deduct
such expenses to any extent for  alternative minimum tax purposes. See  "Certain
Federal  Income  Tax  Consequences--Federal Income  Tax  Consequences  for REMIC
Certificates--Limitations on Deduction of Certain Expenses" in the Prospectus.
 
OPTIONAL TERMINATION
 
    At its option, the Servicer may purchase from the Trust Estate all remaining
Mortgage Loans,  and  thereby effect  early  retirement of  the  Series  1992-13
Certificates, on any Distribution Date when the Pool Scheduled Principal Balance
is  less than  10% of  the Cut-Off  Date Aggregate  Principal Balance.  Any such
purchase will be made only in  connection with a "qualified liquidation" of  the
REMIC  within the  meaning of  Section 860F(a)(4)(A)  of the  Code. The purchase
price will,  generally, be  equal to  the greater  of (i)  the unpaid  principal
balance  of each Mortgage Loan  plus the fair market  value of other property in
the Trust Estate and  (ii) the fair  market value of  the Trust Estate's  assets
plus,   in  each  case,  accrued  interest.   See  "The  Pooling  and  Servicing
Agreement--Termination; Purchase of Mortgage Loans" in the Prospectus.
 
                                      S-61
<PAGE>
                       FEDERAL INCOME TAX CONSIDERATIONS
 
    An election will be  made to treat  the Trust Estate,  and the Trust  Estate
will  qualify, as  a REMIC  for federal income  tax purposes  (the "REMIC"). The
Class A-1, Class A-2,  Class A-3, Class  A-4, Class A-5,  Class A-6, Class  A-7,
Class  A-8,  Class  A-9 and  Class  M Certificates  (collectively,  the "Regular
Certificates") will be  designated as  regular interests  in the  REMIC and  the
Class  A-R Certificate will be designated as the residual interest in the REMIC.
The Class  A-R Certificate  is  a "Residual  Certificate"  for purposes  of  the
Prospectus.  The  Class  A-10 Certificates  and  each  subclass of  the  Class B
Certificates will also be designated as regular interests in the REMIC.
 
    The Offered Certificates will be treated as "qualifying real property loans"
for mutual savings banks and  domestic building and loan associations,  "regular
or  residual interests in a REMIC"  for domestic building and loan associations,
and "real  estate assets"  for  real estate  investment  trusts, to  the  extent
described in the Prospectus.
 
REGULAR CERTIFICATES
 
    The  Regular Certificates generally will be  treated as debt instruments for
federal income  tax  purposes.  Holders  of the  Regular  Certificates  will  be
required  to report income  on such Certificates in  accordance with the accrual
method of accounting. The  Class A-7 Certificates will  be issued with  original
issue  discount  in  an amount  equal  to  the excess  of  all  distributions of
principal and interest  thereon (whether  current or accrued)  over their  issue
price  (including accrued interest). It is anticipated that the Class A-8, Class
A-9 and Class M Certificates will be  issued with original issue discount in  an
amount  equal to the excess of the initial principal balances thereof over their
respective issue prices  (including accrued  interest). It  is also  anticipated
that  the Class A-1, Class A-2, Class  A-3, Class A-4 and Class A-6 Certificates
will be issued at a premium and  that the Class A-5 Certificates will be  issued
with  DE  MINIMIS  original  issue discount  for  federal  income  tax purposes.
However, under proposed Treasury  regulations, the Class  A-1, Class A-2,  Class
A-3,  Class A-4, Class A-5, Class A-6,  Class A-8 and Class A-9 Certificates may
be considered to be issued  with original issue discount  in an amount equal  to
the  excess of  all distributions of  principal and interest  thereon over their
issue prices (including accrued interest).
 
    The Prepayment Assumption (as defined in the Prospectus) that is to be  used
in  determining the rate of  accrual of original issue  discount and whether the
original issue discount  is considered DE  MINIMIS, and  that may be  used by  a
holder  of a Regular  Certificate to amortize premium,  will be calculated using
225% SPA. No representation is made as to the actual rate at which the  Mortgage
Loans will prepay.
 
RESIDUAL CERTIFICATE
 
    The  holder of the Class A-R Certificate  must include the taxable income or
loss of  the REMIC  in determining  its federal  taxable income.  The Class  A-R
Certificate  will remain outstanding for federal income tax purposes until there
are no Certificates of  any other Class  outstanding. PROSPECTIVE INVESTORS  ARE
CAUTIONED  THAT THE CLASS  A-R CERTIFICATEHOLDER'S REMIC  TAXABLE INCOME AND THE
TAX LIABILITY  THEREON WILL  EXCEED  CASH DISTRIBUTIONS  TO SUCH  HOLDER  DURING
CERTAIN  PERIODS,  IN  WHICH  EVENT  THE  HOLDER  THEREOF  MUST  HAVE SUFFICIENT
ALTERNATIVE SOURCES  OF FUNDS  TO PAY  SUCH TAX  LIABILITY. Furthermore,  it  is
anticipated that all of the taxable income of the REMIC includible by the holder
of  the  Class A-R  Certificate will  be treated  as "excess  inclusion" income,
resulting in (i) the  inability of such  holder to use  net operating losses  to
offset  such income,  (ii) the treatment  of such income  as "unrelated business
taxable income" to certain holders who  are otherwise tax-exempt, and (iii)  the
treatment  of such income as subject to  30% withholding tax to certain non-U.S.
investors, with no exemption or treaty reduction.
 
    Under proposed  Treasury  regulations  (the  "Proposed  REMIC  Regulations")
released  by the Internal Revenue Service on  September 27, 1991, since the fair
market value of the Class A-R Certificate will not exceed 2% of the fair  market
value of the REMIC, the Class A-R Certificate will not have "significant value,"
and  thrift institutions  will not  be permitted  to offset  their net operating
losses against such  excess inclusion  income. In addition,  under the  Proposed
REMIC  Regulations,  the  Class  A-R  Certificate will  be  considered  to  be a
"noneconomic residual interest," with the result that transfers thereof will  be
 
                                      S-62
<PAGE>
disregarded  for federal income  tax purposes if any  significant purpose of the
transfer was to  impede the assessment  or collection of  tax. Accordingly,  the
transferee  affidavit  used  for transfers  of  the Class  A-R  Certificate will
require the transferee to state, among other things, that it has no intention to
impede the assessment or collection of any federal, state or local income  taxes
legally  required to be paid with respect to a Class A-R Certificate and that it
will not transfer the Class A-R Certificate to any person or entity that it  has
reason  to believe has the  intention to impede the  assessment or collection of
such taxes. Finally, the Class A-R Certificate generally may not be  transferred
to persons who are not U.S. Persons (as defined herein). See "Description of the
Certificates--Restrictions  on Transfer of the Class A-R Certificate" herein and
"Certain Federal Income  Tax Consequences--Federal Income  Tax Consequences  for
REMIC Certificates--Taxation of the Residual Certificates--Limitations on Offset
or  Exemption of  REMIC Income" and  "--Tax-Related Restrictions  on Transfer of
Residual Certificates-- Noneconomic Residual Interests" in the Prospectus.
 
    An individual, trust or estate that  holds a Class A-R Certificate  (whether
such  Certificate is  held directly  or indirectly  through certain pass-through
entities) also may  have additional  gross income with  respect to,  but may  be
subject  to limitations on the deductibility  of, Servicing Fees on the Mortgage
Loans and other administrative expenses of the REMIC in computing such  holder's
regular  tax liability, and may  not be able to deduct  such fees or expenses to
any extent  in computing  such holder's  alternative minimum  tax liability.  In
addition,  some portion of a purchaser's basis  in the Class A-R Certificate may
not be recovered until termination of the REMIC. Furthermore, the federal income
tax consequences of any consideration paid to a transferee on a transfer of  the
Class   A-R  Certificate  are  unclear;   any  such  transferee  receiving  such
consideration should consult its tax advisors.
 
    Legislation has been proposed that would  generally treat all partners in  a
"large   partnership"  as   Disqualified  Organizations   (as  defined   in  the
Prospectus),  thus  subjecting  such  a   partnership  to  tax  annually  as   a
Pass-Through  Entity  (as  defined  in  the Prospectus)  on  all  of  its excess
inclusion income  at the  highest  corporate rate.  The legislation  would  also
disallow  70%  of  any large  partnership's  miscellaneous  itemized deductions,
including the deductions  for Servicing  Fees on  the Mortgage  Loans and  other
administrative expenses properly allocable to the Class A-R Certificate although
the  remaining deductions would not be  subject to the applicable limitations at
the partner level. A "large  partnership" generally would include a  partnership
having  250  or  more  partners.  This proposed  legislation,  which  was  to be
effective for taxable years ending on or after December 31, 1992 was included in
a Bill that  was passed by  Congress but vetoed  by the President  on March  20,
1992.  No  prediction can  be made  regarding whether  such legislation  will be
reintroduced or,  if reintroduced,  whether  it will  be enacted.  See  "Certain
Federal  Income  Tax  Consequences--Federal Income  Tax  Consequences  for REMIC
Certificates--Taxation of  Residual  Certificates--Tax-Related  Restrictions  on
Transfer  of Residual Certificates"  and "--Limitations on  Deduction of Certain
Expenses" in the Prospectus.
 
    DUE TO  THE  SPECIAL TAX  TREATMENT  OF RESIDUAL  INTERESTS,  THE  EFFECTIVE
AFTER-TAX  RETURN OF THE  CLASS A-R CERTIFICATE MAY  BE SIGNIFICANTLY LOWER THAN
WOULD BE THE CASE IF THE CLASS A-R CERTIFICATE WERE TAXED AS A DEBT INSTRUMENT.
 
                              ERISA CONSIDERATIONS
 
    The Class A-R may not be purchased by or transferred to any person which  is
an  employee benefit  plan within the  meaning of  Section 3(3) of,  or which is
subject to  the  fiduciary duty  rules  of Title  1,  Sections 401-415  of,  the
Employee  Retirement Income Security Act of  1974, as amended ("ERISA"), or Code
Section 4975 or any  person utilizing the assets  of such employee benefit  plan
(an  "ERISA Plan").  Accordingly, the following  discussion does  not purport to
discuss the considerations under ERISA or Code Section 4975 with respect to  the
purchase, acquisition or resale of the Class A-RCertificate.
 
    In  addition, under  current law  the purchase  and holding  of the  Class M
Certificates by  or  on  behalf of  an  ERISA  Plan may  result  in  "prohibited
transactions" within the meaning of ERISA and Code Section 4975. Transfer of the
Class  M Certificates  will not  be made  unless the  transferee (i)  executes a
representation letter in form and substance satisfactory to the Trustee  stating
that it is not, and is not acting on
 
                                      S-63
<PAGE>
behalf  of, any such  ERISA Plan or using  the assets of any  such ERISA Plan to
effect such  purchase  or  (ii) provides  an  opinion  of counsel  in  form  and
substance  satisfactory to the Trustee that the purchase or holding of the Class
M Certificates by or on behalf of such ERISA Plan will not result in the  assets
of  the  Trust  Estate being  deemed  to be  "plan  assets" and  subject  to the
prohibited transaction provisions of ERISA and the Code and will not subject the
Servicer, the  Seller or  the Trustee  to any  obligation in  addition to  those
undertaken in the Pooling and Servicing Agreement. The Class M Certificates will
contain  a legend describing  such restrictions on transfer  and the Pooling and
Servicing Agreement will  provide that  any attempted or  purported transfer  in
violation  of these transfer restrictions will be null and void and will vest no
rights in any purported transferee.  Accordingly, the following discussion  does
not  purport to discuss the considerations under ERISA or Code Section 4975 with
respect to the  purchase, acquisition  or resale  of the  Class A-R  or Class  M
Certificates.
 
    As  described in the Prospectus under  "ERISA Considerations," ERISA and the
Code impose certain duties and restrictions  on ERISA Plans and certain  persons
who  perform services for ERISA Plans.  For example, unless exempted, investment
by an  ERISA  Plan in  the  Offered  Certificates may  constitute  a  prohibited
transaction  under ERISA or the Code. There are certain exemptions issued by the
United States  Department of  Labor (the  "DOL") that  may be  applicable to  an
investment  by  an  ERISA  Plan  in  the  Offered  Certificates,  including  the
individual administrative exemption described  below and Prohibited  Transaction
Class  Exemption 83-1 ("PTE  83-1"). For a further  discussion of the individual
administrative exemption and  PTE 83-1,  including the  necessary conditions  to
their  applicability, and other  important factors to be  considered by an ERISA
Plan  contemplating   investing  in   the  Offered   Certificates,  see   "ERISA
Considerations" in the Prospectus.
 
    On   June  6,  1990,  the  DOL  issued  to  the  Underwriter  an  individual
administrative exemption, Prohibited Transaction  Exemption 90-32, 55 Fed.  Reg.
23147  (the "Exemption"),  from certain of  the prohibited  transaction rules of
ERISA with  respect to  the initial  purchase, the  holding and  the  subsequent
resale  by an ERISA  Plan of certificates  in pass-through trusts  that meet the
conditions and requirements of the Exemption.  The Exemption might apply to  the
acquisition,  holding and  resale of  the Offered  Certificates, other  than the
Class A-R or  Class M Certificates,  by an ERISA  Plan, provided that  specified
conditions are met.
 
    Among  the conditions which would have to  be satisfied for the Exemption to
apply to the  acquisition by an  ERISA Plan of  the Offered Certificates,  other
than  the Class A-R  and Class M  Certificates, is the  condition that the ERISA
Plan investing  in  the Offered  Certificates  be an  "accredited  investor"  as
defined  in  Rule  501(a)(1) of  Regulation  D  of the  Securities  and Exchange
Commission under the Securities Act.
 
    Before purchasing an Offered Certificate, other than the Class A-R or  Class
M  Certificates, a fiduciary of an ERISA  Plan should make its own determination
as to the availability of the exemptive relief provided in the Exemption or  the
availability  of  any  other prohibited  transaction  exemptions  (including PTE
83-1), and whether the  conditions of any such  exemption will be applicable  to
the Offered Certificates, other than the Class A-R and Class M Certificates. Any
fiduciary   of  an  ERISA  Plan  considering  whether  to  purchase  an  Offered
Certificate, other than  the Class  A-R and  Class M  Certificates, should  also
carefully  review with its own legal advisors the applicability of the fiduciary
duty and  prohibited  transaction provisions  of  ERISA  and the  Code  to  such
investment. See "ERISA Considerations" in the Prospectus.
 
                                LEGAL INVESTMENT
 
    The  Offered  Certificates  constitute  "mortgage  related  securities"  for
purposes  of  the  Secondary  Mortgage  Market  Enhancement  Act  of  1984  (the
"Enhancement  Act") and, as such, are  legal investments for certain entities to
the extent provided in the Enhancement Act. However, institutions subject to the
jurisdiction of the  Office of  the Comptroller of  the Currency,  the Board  of
Governors   of  the  Federal  Reserve  System,  the  Federal  Deposit  Insurance
Corporation, the  Office  of  Thrift  Supervision,  the  National  Credit  Union
Administration   or  state  banking  or   insurance  authorities  should  review
applicable rules, supervisory policies and  guidelines of these agencies  before
purchasing any of the Offered
 
                                      S-64
<PAGE>
Certificates,  as certain Subclasses of the Class  A Certificates or the Class M
Certificates may be  deemed to be  unsuitable investments under  one or more  of
these  rules,  policies and  guidelines and  certain  restrictions may  apply to
investments in  other Subclasses  of the  Class A  Certificates or  the Class  M
Certificates. It should also be noted that certain states recently have enacted,
or  have proposed enacting, legislation limiting  to varying extents the ability
of certain entities (in  particular insurance companies)  to invest in  mortgage
related  securities. Investors should  consult with their  own legal advisors in
determining whether and  to what  extent Offered  Certificates constitute  legal
investments for such investors. See "Legal Investment" in the Prospectus.
 
                                SECONDARY MARKET
 
    There  will not  be any market  for the Offered  Certificates offered hereby
prior to the issuance thereof. The Underwriter intends to act as a market  maker
in  the Offered  Certificates, subject to  applicable provisions  of federal and
state securities  laws  and  other  regulatory requirements,  but  is  under  no
obligation  to do so. There  can be no assurance that  a secondary market in the
Offered Certificates will  develop or, if  such a market  does develop, that  it
will provide holders of Offered Certificates with liquidity of investment at any
particular time or for the life of the Offered Certificates.
 
                                  UNDERWRITING
 
    Subject  to the terms and conditions  of the underwriting agreement dated as
of April 14,  1992 (the  "Underwriting Agreement")  among the  Seller, PHMC  and
Prudential  Securities  Incorporated,  as underwriter  (the  "Underwriter"), the
Offered Certificates offered hereby are being  purchased from the Seller by  the
Underwriter  upon issuance. The Underwriter is  committed to purchase all of the
Offered Certificates if any Offered Certificates are purchased. The  Underwriter
has  advised the Seller that it proposes to offer the Offered Certificates, from
time to  time,  for sale  in  negotiated  transactions or  otherwise  at  prices
determined  at the  time of sale.  Proceeds to the  Seller from the  sale of the
Offered Certificates will be approximately  98.609375% of the initial  aggregate
principal balance of the Offered Certificates, plus accrued interest thereon and
on the aggregate initial principal balance of the Class A-10 Certificates at the
rate  of 7.50% per  annum from May 1,  1992 to (but not  including) May 8, 1992,
before deducting expenses payable by  the Seller. The Underwriter, an  affiliate
of  the Seller and the Servicer, has advised the Seller that the Underwriter has
not allocated the  purchase price  paid to the  Seller among  the Subclasses  or
Classes   of  Offered  Certificates.  The   Underwriter  and  any  dealers  that
participate with the Underwriter in the distribution of the Offered Certificates
may be deemed to be underwriters,  and any discounts or commissions received  by
them  and any profit on the resale of Offered Certificates by them may be deemed
to be underwriting discounts or commissions,  under the Securities Act of  1933,
as amended (the "Securities Act").
 
    The  Underwriting Agreement provides that the Seller and PHMC will indemnify
the Underwriter against certain  civil liabilities under  the Securities Act  or
contribute  to payments which the Underwriter may be required to make in respect
thereof.
 
                                      S-65
<PAGE>
                                 LEGAL MATTERS
 
    Certain legal matters  in connection with  the Offered Certificates  offered
hereby  will be passed upon for the Seller by Cadwalader, Wickersham & Taft, New
York, New York, and for the Underwriter by Brown & Wood, New York, New York.
 
                                USE OF PROCEEDS
 
    The net proceeds to  be received from the  sale of the Offered  Certificates
offered  hereby will be applied  by the Seller to the  purchase from PHMC of the
Mortgage Loans represented by  the Series 1992-13  Certificates. It is  expected
that  PHMC will  use the  proceeds from the  sale of  the Mortgage  Loans to the
Seller for its  general business  purposes, including,  without limitation,  the
origination or acquisition of new mortgage loans and the repayment of borrowings
incurred  to  finance  the  origination or  acquisition  of  the  Mortgage Loans
underlying the Series 1992-13 Certificates.
 
                                    RATINGS
 
    It is a  condition to the  issuance of  the Class A  Certificates that  each
Subclass  will have been rated "AAA" by S&P  and Fitch. It is a condition to the
issuance of the Class M Certificates that they shall have been rated "AA" by S&P
and Fitch.  A security  rating is  not a  recommendation to  buy, sell  or  hold
securities  and may  be subject  to revision  or withdrawal  at any  time by the
assigning rating agency. Each security rating should be evaluated  independently
of any other security rating.
 
    The  ratings  of  S&P  on  mortgage  pass-through  certificates  address the
likelihood of the receipt by  certificateholders of payments required under  the
related  pooling and servicing agreement.  S&P's ratings take into consideration
the credit quality of the mortgage pool, including any credit support providers,
structural and legal aspects associated with the certificates, and the extent to
which the  payment stream  on the  mortgage pool  is adequate  to make  payments
required  under the  certificates. S&P's  ratings on  such certificates  do not,
however, constitute  a  statement  regarding frequency  of  prepayments  on  the
mortgages.
 
    The  ratings  of Fitch  on  mortgage pass-through  certificates  address the
likelihood of the receipt  by certificateholders of  all distributions to  which
such  certificateholders  are  entitled.  Fitch's  rating  opinions  address the
structural and legal  aspects associated  with the  certificates, including  the
nature  of  the  underlying  mortgage  loans.  Fitch's  ratings  on pass-through
certificates do  not represent  any  assessment of  the  likelihood or  rate  of
principal prepayments.
 
    The  ratings of  S&P and  Fitch do  not address  the possibility  that, as a
result of principal  prepayments, Certificateholders  may receive  a lower  than
anticipated yield.
 
    The  Seller has not  requested a rating  on the Offered  Certificates of any
Subclass or Class  by any rating  agency other than  S&P and Fitch  and has  not
provided  any information with respect to the Mortgage Loans to any other rating
agency. There can be no assurance that  any rating assigned by any other  rating
agency  to the Offered Certificates will be as high as those assigned by S&P and
Fitch.
 
                                      S-66
<PAGE>
                              INDEX OF SIGNIFICANT
                       PROSPECTUS SUPPLEMENT DEFINITIONS
 
<TABLE>
<CAPTION>
TERM                                                                       PAGE
- -------------------------------------------------------------------------  -----
<S>                                                                        <C>
Accretion Termination Date...............................................  S-24
Accrual Certificates.....................................................  Cover
Accrual Distribution Amount..............................................  S-26
Adjusted Pool Amount.....................................................  S-23
Adjustment Amount........................................................  S-41
Bankruptcy Coverage Termination Date.....................................  S-42
Bankruptcy Loss..........................................................  S-27
Bankruptcy Loss Amount...................................................  S-42
Beneficial Owner.........................................................  S-18
Book-Entry Certificates..................................................   S-6
Book-Entry Nominee.......................................................  S-38
Cede.....................................................................  S-18
Class A Certificates.....................................................  Cover
Class A Distribution Amount..............................................  S-21
Class A Optimal Principal Amount.........................................  S-26
Class A Percentage.......................................................  S-27
Class A Prepayment Percentage............................................  S-27
Class A Principal Amount.................................................  S-26
Class A Principal Balance................................................  S-22
Class A Principal Distribution Amount....................................  S-26
Class A-R Notional Amount................................................  S-23
Class A Subclass Interest Accrual Amount.................................  S-22
Class A Subclass Interest Shortfall Amount...............................  S-24
Class A Subclass Principal Balance.......................................  S-23
Class A-10 Notional Amount...............................................  S-23
Class B Certificates.....................................................  Cover
Class B Principal Balance................................................  S-23
Class B Subclass Interest Accrual Amount.................................  S-22
Class B Subclass Principal Balance.......................................  S-23
Class M Certificates.....................................................  Cover
Class M Distribution Amount..............................................  S-21
Class M Interest Accrual Amount..........................................  S-22
Class M Interest Shortfall Amount........................................  S-25
Class M Optimal Principal Amount.........................................  S-28
Class M Percentage.......................................................  S-29
Class M Prepayment Percentage............................................  S-29
Class M Principal Balance................................................  S-29
Class M Principal Distribution Amount....................................  S-28
Code.....................................................................  S-17
Companion Certificates...................................................  Cover
Cross-Over Date..........................................................  S-40
Current Class B-1 Subordination Level....................................  S-30
Current Class B-2 Subordination Level....................................  S-30
Current Class B-3 Subordination Level....................................  S-30
Current Class M Subordination Level......................................  S-30
Cut-Off Date Aggregate Principal Balance.................................  S-43
Debt Service Reduction...................................................  S-27
Deficient Valuation......................................................  S-27
Definitive Certificates..................................................  S-19
</TABLE>
 
                                      S-67
<PAGE>
<TABLE>
<CAPTION>
TERM                                                                       PAGE
- -------------------------------------------------------------------------  -----
<S>                                                                        <C>
Determination Date.......................................................  S-20
Distribution Date........................................................  S-19
DOL......................................................................  S-64
DTC......................................................................   S-6
Enhancement Act..........................................................  S-65
ERISA....................................................................  S-17
ERISA Plan...............................................................  S-64
Excess Bankruptcy Losses.................................................  S-42
Excess Fraud Losses......................................................  S-42
Excess Principal Payments................................................  S-36
Excess Special Hazard Losses.............................................  S-41
Exemption................................................................  S-64
Fitch....................................................................   S-4
Fixed 15-year Non-relocation Program Loans...............................  S-50
Fixed Program Loans......................................................  S-50
Fraud Coverage Termination Date..........................................  S-41
Fraud Loss...............................................................  S-27
Fraud Loss Amount........................................................  S-41
Indirect Participants....................................................  S-18
Liquidated Loan..........................................................  S-27
Liquidated Loan Loss.....................................................  S-27
Mortgage Loans...........................................................  Cover
Mortgaged Properties.....................................................  S-43
Mortgages................................................................  S-43
Net Foreclosure Profits..................................................  S-37
Net Mortgage Interest Rate...............................................  S-23
Non-Supported Interest Shortfall.........................................  S-23
Original Class B-1 Subordination Level...................................  S-30
Original Class B-2 Subordination Level...................................  S-30
Original Class B-3 Subordination Level...................................  S-30
Original Class M Subordination Level.....................................  S-30
PAC Certificates.........................................................   S-5
PAC Principal Amount.....................................................  S-31
Participants.............................................................  S-18
Percentage Interest......................................................  S-21
PHMC.....................................................................  Cover
Pool Distribution Amount.................................................  S-20
Pool Distribution Amount Allocation......................................  S-21
Pool Scheduled Principal Balance.........................................  S-27
Pooling and Servicing Agreement..........................................  S-60
Prepayment Interest Shortfalls...........................................  S-23
Program Loans............................................................  S-50
Proposed REMIC Regulations...............................................  S-62
PTE 83-1.................................................................  S-64
Realized Losses..........................................................  S-27
Record Date..............................................................  S-20
Regular Certificates.....................................................  S-62
Relocation Mortgage Loans................................................  S-43
REMIC....................................................................   S-2
Residual Certificates....................................................  S-62
Rules....................................................................  S-18
</TABLE>
 
                                      S-68
<PAGE>
<TABLE>
<CAPTION>
TERM                                                                       PAGE
- -------------------------------------------------------------------------  -----
<S>                                                                        <C>
Scheduled Principal Balance..............................................  S-27
Securities Act...........................................................  S-65
Seller...................................................................  Cover
Series 1992-13 Certificates..............................................  Cover
Servicer.................................................................  Cover
S&P......................................................................   S-4
SPA......................................................................  S-56
Special Hazard Loss......................................................  S-27
Special Hazard Loss Amount...............................................  S-41
Special Hazard Termination Date..........................................  S-41
Subclass.................................................................  Cover
Subordinated Certificates................................................  Cover
Subordinated Percentage..................................................  S-28
Subordinated Prepayment Percentage.......................................  S-28
Trust Estate.............................................................  Cover
Trustee..................................................................   S-4
Underwriter..............................................................  S-65
Underwriting Agreement...................................................  S-65
U.S. Person..............................................................  S-38
</TABLE>
 
                                      S-69
<PAGE>
             THE PRUDENTIAL HOME MORTGAGE SECURITIES COMPANY, INC.
                                     SELLER
                       MORTGAGE PASS-THROUGH CERTIFICATES
                              (ISSUABLE IN SERIES)
                               -----------------
 
    The  Prudential  Home Mortgage  Securities  Company, Inc.  (the  "Seller" or
"PHMSC") may sell from time to time under this Prospectus and related Prospectus
Supplements Mortgage Pass-Through Certificates (the "Certificates"), issuable in
series (each, a "Series") consisting of one or more classes (each, a "Class") of
Certificates.
 
    The Certificates of a Series  will represent beneficial ownership  interests
in  a separate  trust formed  by the Seller.  Unless otherwise  specified in the
applicable Prospectus  Supplement, the  property of  each such  trust (for  each
Series,  the "Trust Estate") will be  comprised primarily of fixed or adjustable
interest rate, conventional, monthly pay, fully-amortizing first mortgage  loans
(the  "Mortgage Loans"), secured by  one- to four-family residential properties.
Unless otherwise specified in the applicable prospectus supplement, the Mortgage
Loans will have been acquired by  the Seller from its affiliate, The  Prudential
Home  Mortgage Company, Inc. ("PHMC"), and will have been underwritten to PHMC's
underwriting standards. Unless otherwise specified in the applicable  prospectus
supplement,  all of  the Mortgage Loans  will be  serviced by PHMC  (PHMC in its
capacity as servicer being referred to hereafter as the "Servicer").
 
    The Certificates of  a Series will  consist of  (i) one or  more Classes  of
Certificates  representing fractional  undivided interests in  all the principal
payments and the interest  payments, to the extent  of the related Net  Mortgage
Interest  Rate (as  defined herein),  on the  related Mortgage  Loans ("Standard
Certificates"), (ii) one or more Classes of Certificates representing fractional
undivided interests  in all  or  specified portions  of the  principal  payments
and/or  interest payments,  to the extent  of the related  Net Mortgage Interest
Rate, on the related Mortgage Loans  ("Stripped Certificates"), or (iii) two  or
more Classes of Certificates ("Multi-Class Certificates"), each of which will be
assigned  a principal balance  (a "Stated Amount"),  and each of  which may bear
interest on the Stated Amount at a fixed rate (which may be zero) specified  in,
or  a  variable  rate  determined as  specified  in,  the  applicable Prospectus
Supplement (the "Interest Rate"). Any Class of Certificates may be divided  into
two or more subclasses (each, a "Subclass").
 
    Each  Series of Certificates may include one or more Classes of Certificates
(the "Subordinated Certificates") that are subordinate in right of distributions
to such rights of one or more of  the other Classes of such Series (the  "Senior
Certificates").  If  specified  in  the  applicable  Prospectus  Supplement, the
relative interests of the Senior Certificates and the Subordinated  Certificates
of  a Series in the Trust Estate may  be subject to adjustment from time to time
on the basis of distributions received  in respect thereof. Any Class of  Senior
Certificates  or Subordinated Certificates  may, as described  above, be divided
into two or more Subclasses. If  specified in the Prospectus Supplement,  credit
support  may also be  provided for any Series  of Certificates in  the form of a
guarantee, letter of  credit, mortgage pool  insurance policy or  other form  of
credit enhancement as described herein or therein.
 
    Except  for  the  Seller's  limited obligation  in  connection  with certain
breaches of its  representations and warranties  and certain other  undertakings
and  PHMC's obligations as  Servicer, neither the Seller,  the Servicer, nor any
affiliate of the Seller or the Servicer, will have any obligations with  respect
to  the Certificates. In the event of  delinquencies in payments on the Mortgage
Loans, the Servicer will be obligated to make advances which it determines  will
be recoverable from future payments and collections on the Mortgage Loans.
 
    An election will be made to treat each Trust Estate (or a segregated pool of
assets  therein) underlying a Series of  Multi-Class Certificates or a Series of
Certificates in which the relative interests in the Trust Estate of the  Classes
of  Senior Certificates and Subordinated  Certificates are subject to adjustment
as a "real estate  mortgage investment conduit" (a  "REMIC") for federal  income
tax  purposes. Such an election may also be made with respect to any other Trust
Estate. See "Certain Federal Income Tax Consequences."
 
    There will have  been no public  market for the  Certificates of any  Series
prior to the offering thereof. No assurance can be given that such a market will
develop,   or   that  if   such  a   market  does   develop,  it   will  provide
Certificateholders with liquidity of investment or will continue for the life of
the Certificates.
                             ---------------------
 
   THESE SECURITIES HAVE NOT BEEN  APPROVED OR DISAPPROVED BY THE  SECURITIES
   AND  EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS THE
      SECURITIES  AND  EXCHANGE   COMMISSION  OR   ANY  STATE   SECURITIES
      COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY OF THIS PROSPECTUS.
           ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL OFFENSE.
                              -------------------
 
    The Certificates may be sold from time to time by the Seller through dealers
or  agents,  through  underwriting  syndicates  led  by  one  or  more  managing
underwriters or through  one or  more underwriters  acting alone.  See "Plan  of
Distribution."  Affiliates of the Seller may from  time to time act as agents or
underwriters in connection  with the sale  of the Certificates.  The terms of  a
particular  offering will be set forth  in the Prospectus Supplement relating to
such offering.
 
    THIS PROSPECTUS MAY NOT BE USED  TO CONSUMMATE SALES OF CERTIFICATES  UNLESS
ACCOMPANIED  BY  THE  PROSPECTUS SUPPLEMENT  RELATING  TO THE  OFFERING  OF SUCH
CERTIFICATES.
                             ---------------------
 
                  The date of this Prospectus is April 8, 1992
<PAGE>
                                    REPORTS
 
    The Servicer, or the  Paying Agent appointed by  the Servicer, will  furnish
the  Certificateholders of each Series, in connection with each distribution and
annually, statements  containing  information  with  respect  to  principal  and
interest  payments and the related Trust Estate,  as described herein and in the
applicable Prospectus Supplement  for such Series.  No information contained  in
such  reports will have been examined or  reported upon by an independent public
accountant.   See    "Servicing    of    the    Mortgage    Loans--Reports    to
Certificateholders."  The Servicer will also furnish periodic statements setting
forth certain specified information to the Trustee identified in the  Prospectus
Supplement.  See "Servicing of  the Mortgage Loans--Reports  to the Trustee." In
addition, annually  the Servicer  will furnish  the Trustee  for each  Series  a
statement  from a  firm of  independent public  accountants with  respect to the
examination of  certain documents  and records  relating to  the mortgage  loans
serviced  by the Servicer under the  related Pooling and Servicing Agreement and
other  similar   servicing   agreements.   See  "Servicing   of   the   Mortgage
Loans--Evidence  as to Compliance." Copies of  the monthly and annual statements
provided by the Servicer to the Trustee will be furnished to  Certificateholders
of  each Series upon request  addressed to the Servicer  c/o The Prudential Home
Mortgage Company,  Inc., 7470  New Technology  Way, Frederick,  Maryland  21701,
Attention: Legal Department.
 
                             ADDITIONAL INFORMATION
 
    This  Prospectus contains, and the Prospectus  Supplement for each Series of
Certificates will contain,  a summary  of the  material terms  of the  documents
referred to herein and therein, but neither contains nor will contain all of the
information  set forth in the Registration Statement of which this Prospectus is
a part.  For  further  information,  reference  is  made  to  such  Registration
Statement  and  the  exhibits  thereto  which  the  Seller  has  filed  with the
Securities and Exchange Commission  (the "Commission"), Washington, D.C.,  under
the  Securities  Act  of 1933,  as  amended (the  "Securities  Act"). Statements
contained in this Prospectus and any Prospectus Supplement as to the contents of
any contract or other document referred to are summaries and, in each  instance,
reference  is made  to the copy  of the contract  or other document  filed as an
exhibit to the Registration  Statement, each such  statement being qualified  in
all  respects by  such reference.  Copies of  the Registration  Statement may be
obtained from the Public Reference  Section of the Commission, Washington,  D.C.
20549  upon payment of the prescribed charges, or may be examined free of charge
at the Commission's offices, 450 Fifth Street N.W., Washington, D.C. 20549 or at
the regional offices of the Commission located at Room 1400, 75 Park Place,  New
York,  New  York 10007  and Room  3190, Kluczynski  Federal Building,  230 South
Dearborn Street, Chicago, Illinois 60604.  Copies of any documents  incorporated
herein  by reference  will be provided  to each  person to whom  a Prospectus is
delivered upon written or oral request directed to The Prudential Home  Mortgage
Securities  Company, Inc., 7470  New Technology Way,  Frederick, Maryland 21701,
telephone number 301-846-8199.
 
                                       2
<PAGE>
                               TABLE OF CONTENTS
 
                                   PROSPECTUS
 
<TABLE>
<CAPTION>
                                                                             PAGE
                                                                             ----
<S>                                                                          <C>
Reports....................................................................    2
Additional Information.....................................................    2
Summary of Prospectus......................................................    7
Title of Securities........................................................    7
Seller.....................................................................    7
Servicer...................................................................    7
The Trust Estates..........................................................    7
Description of the Certificates............................................    7
    A. Standard Certificates...............................................    8
    B. Stripped Certificates...............................................    8
    C. Shifting Interest Certificates......................................    8
    D. Multi-Class Certificates............................................    8
Cut-Off Date...............................................................    8
Distribution Dates.........................................................    8
Record Dates...............................................................    9
Interest...................................................................    9
Principal (Including Prepayments)..........................................    9
Distributions in Reduction of Stated Amount................................    9
Credit Enhancement.........................................................    9
Periodic Advances..........................................................   11
Optional Purchase of Mortgage Loans........................................   11
ERISA Limitations..........................................................   11
Tax Status.................................................................   11
Rating.....................................................................   11
The Trust Estates..........................................................   12
General....................................................................   12
Mortgage Loans.............................................................   12
    INSURANCE POLICIES.....................................................   15
    ACQUISITION OF THE MORTGAGE
      LOANS FROM PHMC......................................................   16
    ASSIGNMENT OF MORTGAGE LOANS
      TO THE TRUSTEE.......................................................   16
    REPRESENTATIONS AND WARRANTIES.........................................   18
    OPTIONAL REPURCHASES...................................................   21
Description of The Certificates............................................   21
General....................................................................   21
Percentage Certificates....................................................   23
Multi-Class Certificates...................................................   23
Distributions to Percentage
 Certificateholders........................................................   24
    CERTIFICATES OTHER THAN SHIFTING
      INTEREST CERTIFICATES................................................   24
    CALCULATION OF DISTRIBUTABLE AMOUNTS...................................   24
    DETERMINATION OF AMOUNTS TO
      BE DISTRIBUTED.......................................................   26
    SHIFTING INTEREST CERTIFICATES.........................................   28
</TABLE>
 
                                       3
<PAGE>
<TABLE>
<CAPTION>
                                                                             PAGE
                                                                             ----
<S>                                                                          <C>
Example of Distribution to
 Percentage Certificateholders.............................................   30
Distributions to Multi-Class Certificateholders............................   31
    VALUATION OF MORTGAGE LOANS............................................   32
    SPECIAL DISTRIBUTIONS..................................................   33
    LAST SCHEDULED DISTRIBUTION DATE.......................................   33
Credit Support.............................................................   33
Subordination..............................................................   33
    CERTIFICATES OTHER THAN SHIFTING INTEREST CERTIFICATES.................   33
    SHIFTING INTEREST CERTIFICATES.........................................   36
Other Credit Enhancement...................................................   37
    LIMITED GUARANTEE......................................................   38
    LETTER OF CREDIT.......................................................   38
    POOL INSURANCE POLICIES................................................   38
    SPECIAL HAZARD INSURANCE POLICIES......................................   38
    MORTGAGOR BANKRUPTCY BOND..............................................   38
Prepayment and Yield Considerations........................................   38
Pass-Through Rates and Interest Rates......................................   38
Scheduled Delays in Distributions..........................................   39
Effect of Principal Prepayments............................................   39
Weighted Average Life of Certificates......................................   40
The Seller.................................................................   41
PHMC.......................................................................   42
General....................................................................   42
Mortgage Loan Production Sources...........................................   43
Mortgage Loan Underwriting.................................................   44
Mortgage Origination Processing............................................   47
Servicing..................................................................   47
Use of Proceeds............................................................   48
Servicing of the Mortgage Loans............................................   48
The Servicer...............................................................   48
Payments on Mortgage Loans.................................................   48
Periodic Advances and Limitations Thereon..................................   51
Adjustment to Servicing Fee in Connection with Prepaid and Liquidated
 Mortgage Loans............................................................   51
Reports to Certificateholders..............................................   51
Reports to the Trustee.....................................................   53
Collection and Other Servicing Procedures..................................   53
Enforcement of Due-on-Sale Clauses;
 Realization Upon Defaulted Mortgage Loans.................................   54
Fixed Retained Yield, Servicing Compensation and Payment of Expenses.......   55
Evidence as to Compliance..................................................   56
Certain Matters Regarding the Servicer.....................................   56
The Pooling and Servicing Agreement........................................   57
Events of Default..........................................................   57
Rights Upon Event of Default...............................................   58
Amendment..................................................................   59
Termination; Purchase of Mortgage Loans....................................   59
The Trustee................................................................   60
</TABLE>
 
                                       4
<PAGE>
<TABLE>
<CAPTION>
                                                                             PAGE
                                                                             ----
<S>                                                                          <C>
Certain Legal Aspects of the Mortgage Loans................................   60
General....................................................................   60
Foreclosure................................................................   61
Foreclosure on Shares of Cooperatives......................................   61
Rights of Redemption.......................................................   62
Anti-Deficiency Legislation and Other Limitations on Lenders...............   63
Soldiers' and Sailors' Civil Relief Act and Similar Laws...................   64
Environmental Considerations...............................................   64
"Due-on-Sale" Clause.......................................................   64
Applicability of Usury Laws................................................   65
Enforceability of Certain Provisions.......................................   66
Certain Federal Income Tax Consequences....................................   66
Federal Income Tax Consequences for REMIC Certificates.....................   67
  General..................................................................   67
  Status of REMIC Certificates.............................................   67
  Qualification as a REMIC.................................................   67
  Taxation of Regular Certificates.........................................   69
    GENERAL................................................................   69
    ORIGINAL ISSUE DISCOUNT................................................   69
    VARIABLE RATE REGULAR CERTIFICATES.....................................   71
    MARKET DISCOUNT........................................................   72
    PREMIUM................................................................   73
    SALE OR EXCHANGE OF REGULAR CERTIFICATES...............................   73
Taxation of Residual Certificates..........................................   73
    TAXATION OF REMIC INCOME...............................................   73
    BASIS AND LOSSES.......................................................   74
    TREATMENT OF CERTAIN ITEMS OF REMIC INCOME AND EXPENSE.................   75
      ORIGINAL ISSUE DISCOUNT..............................................   75
      MARKET DISCOUNT......................................................   75
      PREMIUM..............................................................   75
      LIMITATIONS OF OFFSET OR EXEMPTION OF REMIC INCOME...................   76
    TAX-RELATED RESTRICTIONS ON TRANSFER OF RESIDUAL CERTIFICATES..........   77
    DISQUALIFIED ORGANIZATIONS.............................................   77
    NONECONOMIC RESIDUAL INTERESTS.........................................   78
    FOREIGN INVESTORS......................................................   78
      SALE OR EXCHANGE OF A RESIDUAL CERTIFICATE...........................   79
    TAXES THAT MAY BE IMPOSED ON THE REMIC POOL............................   79
      PROHIBITED TRANSACTIONS..............................................   79
      CONTRIBUTIONS TO THE REMIC POOL AFTER THE STARTUP DAY................   80
      NET INCOME FROM FORECLOSURE PROPERTY.................................   80
      LIQUIDATION OF THE REMIC POOL........................................   80
      ADMINISTRATIVE MATTERS...............................................   80
Limitations on Deduction of Certain Expenses...............................   80
Taxation of Certain Foreign Investors......................................   81
    REGULAR CERTIFICATES...................................................   81
    RESIDUAL CERTIFICATES..................................................   81
Backup Withholding.........................................................   82
Reporting Requirements.....................................................   82
</TABLE>
 
                                       5
<PAGE>
<TABLE>
<CAPTION>
                                                                             PAGE
                                                                             ----
<S>                                                                          <C>
Federal Income Tax Consequences for Certificates as to Which No REMIC
 Election Is Made..........................................................   83
Standard Certificates......................................................   83
    GENERAL................................................................   83
    TAX STATUS.............................................................   83
    PREMIUM AND DISCOUNT...................................................   84
      PREMIUM..............................................................   84
      ORIGINAL ISSUE DISCOUNT..............................................   84
      MARKET DISCOUNT......................................................   85
      RECHARACTERIZATION OF SERVICING FEES.................................   85
    SALE OR EXCHANGE OF STANDARD CERTIFICATES..............................   86
Stripped Certificates......................................................   86
    GENERAL................................................................   86
    STATUS OF STRIPPED CERTIFICATES........................................   87
    TAXATION OF STRIPPED CERTIFICATES......................................   87
    ORIGINAL ISSUE DISCOUNT................................................   87
      SALE OR EXCHANGE OF STRIPPED CERTIFICATES............................   88
      PURCHASE OF MORE THAN ONE CLASS OF STRIPPED CERTIFICATES.............   89
      POSSIBLE ALTERNATIVE CHARATERIZATIONS................................   89
Reporting Requirements and Backup Withholding..............................   89
Taxation of Certain Foreign Investors......................................   89
ERISA Considerations.......................................................   90
Legal Investment...........................................................   94
Plan of Distribution.......................................................   95
Legal Matters..............................................................   96
Rating.....................................................................   96
Index of Significant Definitions...........................................   97
</TABLE>
 
                                       6
<PAGE>
                             SUMMARY OF PROSPECTUS
 
    THE  FOLLOWING IS  QUALIFIED IN  ITS ENTIRETY  BY REFERENCE  TO THE DETAILED
INFORMATION APPEARING  ELSEWHERE IN  THIS PROSPECTUS,  AND BY  REFERENCE TO  THE
INFORMATION  WITH  RESPECT  TO  EACH SERIES  OF  CERTIFICATES  CONTAINED  IN THE
APPLICABLE  PROSPECTUS  SUPPLEMENT.  CERTAIN  CAPITALIZED  TERMS  USED  AND  NOT
OTHERWISE  DEFINED  HEREIN  SHALL  HAVE THE  MEANINGS  GIVEN  ELSEWHERE  IN THIS
PROSPECTUS.
 
<TABLE>
<S>                     <C>
Title of Securities...  Mortgage Pass-Through Certificates (Issuable in Series).
 
Seller................  The Prudential  Home Mortgage  Securities Company,  Inc.
                        (the "Seller"), a direct, wholly-owned subsidiary of The
                        Prudential  Home Mortgage Company,  Inc. ("PHMC"), which
                        is a  direct,  wholly-owned  subsidiary  of  Residential
                        Services  Corporation of America.  See "The Seller." The
                        Seller  and   PHMC  are   each  indirect,   wholly-owned
                        subsidiaries  of  The  Prudential  Insurance  Company of
                        America ("Prudential Insurance").
 
Servicer..............  PHMC (in such  capacity, the  "Servicer"). The  Servicer
                        will  service the  Mortgage Loans  comprising each Trust
                        Estate and administer  each Trust Estate  pursuant to  a
                        Pooling  and Servicing  Agreement (each,  a "Pooling and
                        Servicing Agreement").  See "Servicing  of the  Mortgage
                        Loans."
 
The Trust Estates.....  Each  Trust Estate will consist  of the related Mortgage
                        Loans (other than the  Fixed Retained Yield (as  defined
                        herein),  if any) and certain other related property, as
                        specified  in  the  applicable  Prospectus   Supplement.
                        Unless  otherwise specified in the applicable Prospectus
                        Supplement, the  Mortgage  Loans will  be  conventional,
                        fixed  interest  rate,  monthly  pay,  fully-amortizing,
                        level payment,  one-  to four-family  residential  first
                        mortgage  loans.  If  so  specified  in  the  applicable
                        Prospectus Supplement, a Trust Estate may include  fully
                        amortizing,  adjustable  rate  Mortgage  Loans, Mortgage
                        Loans secured  by condominium  units, townhouses,  units
                        located  within  planned  unit  developments,  long-term
                        leases with  respect to  any  of the  foregoing,  shares
                        issued   by  cooperative  housing  corporations,  and/or
                        Mortgage   Loans   which   are   subject   to   interest
                        differential  subsidy agreements or buydown schedules or
                        which provide for balloon payments of principal.
 
                        The Mortgage Loans will have been acquired by the Seller
                        from  its  affiliate  PHMC  or  another  affiliate.  The
                        Mortgage Loans will have been originated by PHMC or will
                        have  been  acquired by  PHMC  from other  mortgage loan
                        originators, in each case for its own account or for the
                        account of an affiliate. All of the Mortgage Loans  will
                        have  been  underwritten to  PHMC's standards.  See "The
                        Trust Estates."
 
                        The particular characteristics of each Trust Estate will
                        be set forth in the applicable Prospectus Supplement.
 
Description of the      Each Series  will  consist of  one  or more  Classes  of
  Certificates........  Certificates  which  may be  (i)  Standard Certificates,
                        (ii) Stripped Certificates,
</TABLE>
 
                                       7
<PAGE>
 
<TABLE>
<S>                     <C>
                        or  (iii)  Multi-Class  Certificates.  Unless  otherwise
                        specified  in the applicable  Prospectus Supplement, the
                        Certificates will  be offered  only in  fully-registered
                        form.
 
  A.  Standard          Standard  Certificates of a Series  will each evidence a
  Certificates........  fractional undivided beneficial interest in the  related
                        Trust  Estate and will entitle the holder thereof to its
                        proportionate share of a percentage of the principal and
                        interest payments (to the  extent of the applicable  Net
                        Mortgage Interest Rate) on the related Mortgage Loans.
 
  B.  Stripped          Stripped  Certificates will  each evidence  a fractional
  Certificates........  undivided  beneficial  interest  in  the  related  Trust
                        Estate  and  will  entitle  the  holder  thereof  to its
                        proportionate share of a specified portion (which may be
                        zero) of principal payments  and/or a specified  portion
                        (which  may be zero) of interest payments (to the extent
                        of the  applicable Net  Mortgage Interest  Rate) on  the
                        related Mortgage Loans.
 
  C.  Shifting          Shifting  Interest Certificates of a Series are Standard
  Interest              or Stripped Certificates,  credit enhancement for  which
  Certificates........  is  supplied by the adjustment from  time to time of the
                        relative interests  in the  Trust Estate  of the  Senior
                        Certificates  and the Subordinated  Certificates of such
                        Series. See  "Description of  the  Certificates--Distri-
                        butions   to   Percentage   Certificateholders--Shifting
                        Interest Certificates" and "Credit
                        Support--Subordination--Shifting Interest Certificates."
 
  D.  Multi-Class       Each Series of Multi-Class Certificates will consist  of
  Certificates........  Certificates,  each  of  which  evidences  a  beneficial
                        interest in the  related Trust Estate  and entitles  the
                        holder  thereof to interest  payments on the outstanding
                        Stated Amount  thereof at  a fixed  rate (which  may  be
                        zero)  specified in,  or a  variable rate  determined as
                        specified in, the applicable Prospectus Supplement,  and
                        distributions   in  reduction  of   such  Stated  Amount
                        determined in the manner and applied in the priority set
                        forth  in  the  applicable  Prospectus  Supplement.  The
                        aggregate  Stated  Amount  of  a  Series  of Multi-Class
                        Certificates may be  less than  the aggregate  principal
                        balance of the related Mortgage Loans.
 
Cut-Off Date..........  The   date  specified   in  the   applicable  Prospectus
                        Supplement.
 
Distribution Dates....  Distributions  on  Standard  Certificates  and  Stripped
                        Certificates  will be made on the  25th day (or, if such
                        day is not  a business day,  the business day  following
                        the  25th day) of each  month, commencing with the month
                        following the month in which the applicable Cut-Off Date
                        occurs (each, a  "Distribution Date"). Distributions  on
                        Multi-Class   Certificates   will   be   made   monthly,
                        quarterly, or semi-annually, on  the dates specified  in
                        the applicable Prospectus Supplement.
</TABLE>
 
                                       8
<PAGE>
 
<TABLE>
<S>                     <C>
Record Dates..........  Distributions  will be made on each Distribution Date to
                        Certificateholders of record at the close of business on
                        (unless a different date is specified in the  applicable
                        Prospectus  Supplement)  the  last business  day  of the
                        month preceding  the month  in which  such  Distribution
                        Date occurs (each, a "Record Date").
 
Interest..............  With  respect to a Series  of Certificates consisting of
                        Standard Certificates or Stripped Certificates, interest
                        on  the  related  Mortgage   Loans  at  the   applicable
                        pass-through  rate  for  each  Class  and  Subclass (the
                        "Pass-Through Rate"),  as set  forth in  the  applicable
                        Prospectus Supplement, will be passed through monthly to
                        holders thereof, in accordance with the particular terms
                        of   each  such  Certificate.   Holders  of  Multi-Class
                        Certificates will receive  distributions of interest  on
                        the Stated Amount of such Certificate, without regard to
                        the   Net  Mortgage  Interest  Rate  on  the  underlying
                        Mortgage Loans. The Net Mortgage Interest Rate for  each
                        Mortgage  Loan in a given period will equal the mortgage
                        interest rate for such Mortgage Loan in such period,  as
                        specified  in the  related mortgage  note (the "Mortgage
                        Interest Rate"), less  the retained yield,  if any  (the
                        "Fixed Retained Yield"), and less an amount reserved for
                        servicing  the Mortgage  Loan and  administration of the
                        related Trust  Estate and  related expenses  (the  "Ser-
                        vicing Fee").
 
Principal (Including    With  respect to  a Series  of Standard  Certificates or
  Prepayments)........  Stripped Certificates, unless otherwise specified in the
                        applicable  Prospectus  Supplement,  principal  payments
                        (including  prepayments in full received on each related
                        Mortgage Loan during  the month preceding  the month  in
                        which a Distribution Date occurs and partial prepayments
                        applied  by the Servicer prior to the Determination Date
                        preceding such Distribution Date) will be passed through
                        to holders on such Distribution Date.
 
Distributions in        With respect to  a Series  of Multi-Class  Certificates,
  Reduction of Stated   distributions in reduction of Stated Amount will be made
  Amount..............  on  each Distribution Date to  the holders of each Class
                        then entitled to  receive such  distributions until  the
                        aggregate  amount of such distributions have reduced the
                        Stated Amount  of each  such  Class of  Certificates  to
                        zero.  Distributions in reduction  of Stated Amount will
                        be allocated among the  Classes of such Certificates  in
                        the   manner  specified  in  the  applicable  Prospectus
                        Supplement. See "Description of the
                        Certificates--Distributions to Multi-Class Cer-
                        tificateholders."
 
Credit Enhancement....  A Series of Certificates may include one or more Classes
                        of Senior  Certificates  and  one  or  more  Classes  of
                        Subordinated  Certificates. The rights of the holders of
                        Subordinated  Certificates  of   a  Series  to   receive
                        distributions with respect to the related Mortgage Loans
                        will  be subordinated to  such rights of  the holders of
                        the Senior Certificates of the same Series to the extent
                        (the "Subordinated Amount") specified in the  applicable
                        Prospectus Supplement. This subordination is intended to
                        enhance  the  likelihood of  the  timely receipt  by the
                        Senior Certificateholders of their
</TABLE>
 
                                       9
<PAGE>
 
<TABLE>
<S>                     <C>
                        proportionate share of  scheduled monthly principal  and
                        interest  payments on the related  Mortgage Loans and to
                        protect them  against losses.  This protection  will  be
                        effected   by  the  preferential  right  of  the  Senior
                        Certificateholders to receive  current distributions  on
                        the  related Mortgage Loans and  (if so specified in the
                        applicable Prospectus Supplement)  by the  establishment
                        of  a  reserve fund  (the "Subordination  Reserve Fund")
                        with  respect  to  each  Series  of  Certificates   that
                        includes  a  Class  of  Subordinated  Certificates.  Any
                        Subordination Reserve Fund may be funded initially  with
                        the  Initial Deposit  (as defined  herein) in  an amount
                        specified in the  applicable Prospectus Supplement,  and
                        may  be funded  from time to  time from  payments on the
                        Mortgage   Loans   otherwise   distributable   to    the
                        Subordinated Certificateholders in the manner and to the
                        extent    specified   in   the   applicable   Prospectus
                        Supplement. The maintenance of any Subordination Reserve
                        Fund is intended  to provide liquidity,  but in  certain
                        circumstances  the Subordination  Reserve Fund  could be
                        depleted   and,   if   other   amounts   available   for
                        distribution are insufficient, shortfalls in
                        distributions  to  the  Senior  Certificateholders could
                        result. Until  the  Subordinated Amount  is  reduced  to
                        zero,  Senior  Certificateholders  will  be  entitled to
                        receive the amount of any such shortfall, together  with
                        interest  at  the applicable  Pass-Through Rate,  on the
                        next  Distribution   Date  (as   defined  herein).   The
                        Subordinated   Amount  is  intended  to  protect  Senior
                        Certificateholders against  losses, however,  if  losses
                        realized  on the  Mortgage Loans  in a  Trust Estate are
                        exceptionally high Senior  Certificateholders will  bear
                        their  proportionate share of any losses realized on the
                        related Mortgage  Loans  in  excess  of  the  applicable
                        Subordinated Amount.
 
                        If so specified in the applicable Prospectus Supplement,
                        the   protection   afforded   to   holders   of   Senior
                        Certificates of a Series by the subordination of certain
                        rights of holders of  Subordinated Certificates of  such
                        Series  to distributions  on the  related Mortgage Loans
                        may be effected  by a method  other than that  described
                        above,  such as, in the  event that the applicable Trust
                        Estate (or a segregated  pool of assets therein)  elects
                        to  be treated as a REMIC, the reallocation from time to
                        time, on the basis of distributions previously received,
                        of the  respective percentage  interests of  the  Senior
                        Certificates  and the  Subordinated Certificates  in the
                        related  Trust   Estate.   See   "Description   of   the
                        Certificates--Distributions to Percentage
                        Certificateholders-- Shifting Interest Certificates."
 
                        The  Certificates  of any  Series,  or any  one  or more
                        Classes thereof, may  be entitled to  the benefits of  a
                        guarantee,  letter  of credit,  mortgage  pool insurance
                        policy or other form of credit enhancement as  specified
                        in    the   applicable    Prospectus   Supplement.   See
                        "Description of the Certificates" and "Credit Support."
</TABLE>
 
                                       10
<PAGE>
 
<TABLE>
<S>                     <C>
Periodic Advances.....  In  the  event  of  delinquencies  in  payments  on  the
                        Mortgage  Loans, the Servicer will make advances of cash
                        ("Periodic Advances")  to  the Certificate  Account  (as
                        defined   herein)  to  the   extent  that  the  Servicer
                        determines such Periodic  Advances would be  recoverable
                        from  future  payments and  collections on  the Mortgage
                        Loans. Any such Periodic  Advances will be  reimbursable
                        to  the Servicer as described herein and in the applica-
                        ble  Prospectus  Supplement.   See  "Servicing  of   the
                        Mortgage   Loans--Periodic   Advances   and  Limitations
                        Thereon."
 
Optional Purchase of    The Seller may, at its option, repurchase any  defaulted
  Mortgage              Mortgage   Loan.   See   "The   Trust  Estates--Mortgage
  Loans...............  Loans--Optional Repurchases."  If  so specified  in  the
                        Prospectus Supplement with respect to a Series, all, but
                        not  less than all, of the Mortgage Loans in the related
                        Trust  Estate  and  any  property  acquired  in  respect
                        thereof  at the time, may be  purchased by the person or
                        persons specified in such  Prospectus Supplement in  the
                        manner  and at  the price  specified in  such Prospectus
                        Supplement. In the  event that  an election  is made  to
                        treat  the related Trust Estate (or a segregated pool of
                        assets therein) as  a REMIC, any  such purchase will  be
                        effected  only pursuant to a "qualified liquidation," as
                        defined under Section 860F(a)(4)(A) of the Internal Rev-
                        enue Code of 1986, as amended (the "Code"). Exercise  of
                        the  right of purchase will  effect the early retirement
                        of the Certificates of that Series. See "Prepayment  and
                        Yield Considerations."
 
ERISA Limitations.....  A  fiduciary of any employee benefit plan subject to the
                        fiduciary  responsibility  provisions  of  the  Employee
                        Retirement  Income  Security  Act  of  1974,  as amended
                        ("ERISA"), including the "prohibited transaction"  rules
                        thereunder,  and to the  corresponding provisions of the
                        Code,  should  carefully  review  with  its  own   legal
                        advisors whether the purchase or holding of Certificates
                        could give rise to a transaction prohibited or otherwise
                        impermissible  under  ERISA  or  the  Code.  See  "ERISA
                        Considerations."
 
Tax Status............  The treatment of the Certificates for federal income tax
                        purposes will  be  determined  (i) by  whether  a  REMIC
                        election   is  made   with  respect   to  a   Series  of
                        Certificates and,  if  a  REMIC  election  is  made,  by
                        whether   the  Certificates  are  Regular  Interests  or
                        Residual Interests  and  (ii)  by whether,  if  a  REMIC
                        election  is not  made, the Certificates  of such Series
                        are Standard Certificates or Stripped Certificates.  See
                        "Certain Federal Income Tax Consequences."
 
Rating................  It  is  a  condition  to the  issuance  of  the Stripped
                        Certificates and  the  Multi-Class Certificates  of  any
                        Series  that they  be rated  in one  of the  two highest
                        rating categories by at least one nationally  recognized
                        statistical  rating  organization  (a  "Rating Agency").
                        Standard Certificates  may  or may  not  be rated  by  a
                        Rating Agency.
</TABLE>
 
                                       11
<PAGE>
                               THE TRUST ESTATES
 
GENERAL
 
    The  Trust Estate for  each Series of Certificates  will consist of Mortgage
Loans evidenced by promissory notes (the "Mortgage Notes") secured by mortgages,
deeds of trust or  other instruments creating first  liens (the "Mortgages")  on
some  or all of the  following types of property  (as so secured, the "Mortgaged
Properties"), to the extent set  forth in the applicable Prospectus  Supplement:
(i)  one- to four-family detached residences, (ii) townhouses, (iii) condominium
units, (iv) units within  planned unit developments,  (v) long-term leases  with
respect  to any of the  foregoing, and (vi) shares  issued by private non-profit
housing corporations  ("cooperatives") and  the  related proprietary  leases  or
occupancy agreements granting exclusive rights to occupy specified units in such
cooperatives'  buildings.  In addition,  a Trust  Estate  will also  include (i)
amounts held from  time to  time in the  related Certificate  Account, (ii)  the
Seller's  interest in  any primary  mortgage insurance,  hazard insurance, title
insurance or other  insurance policies relating  to a Mortgage  Loan, (iii)  any
property  which initially secured a Mortgage Loan and which has been acquired by
foreclosure or trustee's sale or deed in lieu of foreclosure or trustee's  sale,
(iv)  if applicable, and  to the extent  set forth in  the applicable Prospectus
Supplement, any Subordination Reserve Fund and/or any other reserve fund, (v) if
applicable, and to the extent set forth in the applicable Prospectus Supplement,
contractual obligations of any person to make payments in respect of any form of
credit enhancement or any interest subsidy agreement, and (vi) such other assets
as may be specified  in the applicable  Prospectus Supplement. Unless  otherwise
specified  in the  applicable Prospectus Supplement,  the Trust  Estate will not
include,  however,  the  portion  of  interest  on  the  Mortgage  Loans   which
constitutes  the Fixed  Retained Yield, if  any. See "Servicing  of the Mortgage
Loans-- Fixed Retained Yield; Servicing Compensation and Payment of Expenses."
 
MORTGAGE LOANS
 
    The Mortgage Loans will have been acquired by the Seller from its  affiliate
PHMC  or another affiliate. The Mortgage Loans will have been originated by PHMC
for its  own account  or for  the  account of  an affiliate  or will  have  been
acquired  by PHMC for  its own account or  for the account  of an affiliate from
other mortgage loan originators. Each Mortgage Loan will have been  underwritten
to   PHMC's  standards.  See  "PHMC--  Mortgage  Loan  Production  Sources"  and
"--Mortgage Loan Underwriting." The Prospectus  Supplement for each Series  will
set  forth the  respective number  and principal  amounts of  Mortgage Loans (i)
originated by PHMC for its own account or for the account of its affiliates  and
(ii)  purchased by PHMC for its own account or for the account of its affiliates
from other  mortgage  loan originators  through  PHMC's mortgage  loan  purchase
programs.
 
    Each  of the  Mortgage Loans will  be secured  by a Mortgage  on a Mortgaged
Property located in any of the 50 states or the District of Columbia. Generally,
the land underlying a Mortgaged Property will consist of five acres or less  but
may  consist of greater acreage in PHMC's  discretion. The Mortgage Loans may be
secured by leases on real property  under circumstances that PHMC determines  in
its  discretion  are commonly  acceptable  to institutional  mortgage investors.
Generally, a  Mortgage Loan  will be  secured  by a  lease only  if the  use  of
leasehold  estates as security for mortgage loans  is customary in the area, the
lease is not subject to any prior  lien that could result in termination of  the
lease  and the term  of the lease ends  at least five  years beyond the maturity
date of the related Mortgage Loan. The Prospectus Supplement will set forth  the
geographic  distribution of  Mortgaged Properties  and the  number and aggregate
unpaid principal  balances  of  the  Mortgage Loans  by  category  of  Mortgaged
Property.
 
    The  Prospectus Supplement for each Series will  also set forth the range of
original terms  to maturity  of the  Mortgage  Loans in  the Trust  Estate,  the
weighted  average remaining term to stated maturity  at the Cut-Off Date of such
Mortgage Loans, the earliest and latest  months of origination of such  Mortgage
Loans,  the range  of Mortgage  Interest Rates  and Net  Mortgage Interest Rates
borne by such Mortgage Loans, if  such Mortgage Loans have varying Net  Mortgage
Interest  Rates, the weighted average Net  Mortgage Interest Rate at the Cut-Off
Date of such Mortgage Loans,  the range of Loan-to-Value  Ratios at the time  of
origination of such Mortgage Loans and the highest outstanding principal balance
at origination of any such Mortgage Loan.
 
                                       12
<PAGE>
    Unless  otherwise specified in the  applicable Prospectus Supplement, all of
the Mortgage Loans in a Trust Estate will have monthly payments due on the first
of each month (each, a "Due Date") and will be fully-amortizing Mortgage  Loans,
each  with a fixed rate of interest and  level monthly payments over the term of
the Mortgage Loan. If  so specified in the  applicable Prospectus Supplement,  a
Trust  Estate may include fully amortizing,  adjustable rate Mortgage Loans with
Mortgage Interest Rates adjusted  periodically, in the  manner specified in  the
related  Prospectus  Supplement. Unless  otherwise  specified in  the applicable
Prospectus Supplement, no adjustable interest rate Mortgage Loan will be subject
to a  possibility  of negative  amortization.  If specified  in  the  applicable
Prospectus Supplement, fixed rates on certain Mortgage Loans may be converted to
adjustable rates and adjustable rates on certain Mortgage Loans may be converted
to  fixed rates, in each case after  origination of such Mortgage Loans and upon
the satisfaction  of other  conditions specified  in the  applicable  Prospectus
Supplement.  Unless otherwise specified in the applicable Prospectus Supplement,
in either  such event,  the Pooling  and Servicing  Agreement will  require  the
Servicer  to repurchase each such converted Mortgage Loan at the price set forth
in  the  applicable  Prospectus  Supplement.  If  specified  in  the  applicable
Prospectus  Supplement, a  Trust Estate  may contain  convertible Mortgage Loans
which have converted prior to  the formation of the  Trust Estate and which  are
subject to no further conversions.
 
    Unless  otherwise  specified  in the  applicable  Prospectus  Supplement, no
Mortgage Loan will have  had at origination a  Loan-to-Value Ratio in excess  of
90%.  The Loan-to-Value Ratio  is the ratio,  expressed as a  percentage, of the
principal amount of the Mortgage  Loan at origination to  the lesser of (i)  the
appraised  value  of  the  related  Mortgaged  Property,  as  established  by an
appraisal obtained by the originator generally no more than four months prior to
origination, or  (ii) the  sale price  for  such property.  For the  purpose  of
calculating  the Loan-to-Value Ratio of any Mortgage  Loan that is the result of
the refinancing (including a refinancing for  "equity take out" purposes) of  an
existing mortgage loan, the appraised value of the related Mortgaged Property is
generally  determined by reference  to an appraisal  obtained in connection with
the origination  of the  replacement  loan. Unless  otherwise specified  in  the
related  Prospectus Supplement,  with respect  to a  Mortgage Loan  secured by a
second home,  an  owner-occupied  cooperative,  a high  rise  condominium  or  a
non-owner  occupied property, the  Loan-to-Value Ratio will  not exceed 80%, and
with respect to a Mortgage Loan which is made to refinance, for equity take  out
purposes,  an  existing  mortgage loan  on  a non-owner  occupied  property, the
Loan-to-Value Ratio  will generally  not  exceed 75%.  Mortgage Loans  having  a
Loan-to-Value  Ratio in excess  of 80% will  not be covered  by primary mortgage
insurance,  except  to  the  extent  specified  in  the  applicable   Prospectus
Supplement. See "PHMC--Mortgage Loan Underwriting."
 
    No  assurance  can be  given that  values of  the Mortgaged  Properties have
remained or will remain at  the levels which existed  on the dates of  appraisal
(or,  where applicable, recertification of value) of the related Mortgage Loans.
If residential real estate  values generally or  in particular geographic  areas
decline  such  that  the outstanding  balances  of  the Mortgage  Loans  and any
secondary financing on  the Mortgaged  Properties in a  particular Trust  Estate
become  equal to or greater than the values of the related Mortgaged Properties,
the actual rates of delinquencies, foreclosures and losses could be higher  than
those  now generally experienced in the  mortgage lending industry and those now
experienced  in  PHMC's  servicing  portfolio.  In  addition,  adverse  economic
conditions generally, in particular geographic areas or industries, or affecting
particular  segments of the  borrowing community (such  as mortgagors relying on
commission income and self-employed mortgagors)  and other factors which may  or
may  not  affect real  property  values, including  the  purposes for  which the
Mortgage Loans were made  and the uses of  the Mortgaged Properties, may  affect
the timely payment by mortgagors of scheduled payments of principal and interest
on  the  Mortgage Loans  and, accordingly,  the  actual rates  of delinquencies,
foreclosures and losses with  respect to any  Trust Estate. See  "PHMC--Mortgage
Loan Underwriting" and "Description of the Certificates--
 
                                       13
<PAGE>
Weighted  Average Life of  Certificates" herein. To the  extent that such losses
are not  covered by  the methods  of credit  support or  the insurance  policies
described  herein, they  will be  borne by  holders of  the Certificates  of the
Series evidencing interests in such Trust Estate.
 
    Unless otherwise  provided  in  the applicable  Prospectus  Supplement,  all
Mortgage  Loans will  be covered by  an appropriate standard  form American Land
Title Association ("ALTA")  title insurance policy,  or a substantially  similar
policy  or  form  of  insurance  acceptable  to  the  Federal  National Mortgage
Association ("FNMA") or the Federal Home Loan Mortgage Corporation ("FHLMC").
 
    If so specified in the applicable Prospectus Supplement, a Trust Estate  may
contain   Mortgage  Loans  subject  to  temporary  interest  subsidy  agreements
("Subsidy Loans") pursuant  to which the  monthly payments made  by the  related
mortgagors  will be  less than the  scheduled monthly payments  on such Mortgage
Loans with the present  value of the resulting  difference in payment  ("Subsidy
Payments")  being provided  by the  employer of  the mortgagor,  generally on an
annual  basis.  Unless   otherwise  specified  in   the  applicable   Prospectus
Supplement,  Subsidy Payments  will be placed  in a  custodial account ("Subsidy
Account") by  the  Servicer. Despite  the  existence  of a  subsidy  program,  a
mortgagor  remains  primarily  liable for  making  all scheduled  payments  on a
Subsidy Loan and for all other obligations provided for in the related  Mortgage
Note and Mortgage Loan.
 
    Subsidy  Loans are offered by employers generally through either a graduated
or fixed  subsidy loan  program, or  a  combination thereof.  The terms  of  the
subsidy  agreements relating  to Subsidy Loans  generally range from  one to ten
years. The subsidy agreements relating to  Subsidy Loans made under a  graduated
program  generally will  provide for subsidy  payments that  result in effective
subsidized interest rates  between three percentage  points and five  percentage
points  below  the Mortgage  Interest Rates  specified  in the  related Mortgage
Notes. Generally, under a graduated program, the subsidized rate for a  Mortgage
Loan  will increase approximately one percentage  point per year until it equals
the full Mortgage Interest Rate. For example, if the initial subsidized interest
rate is five percentage points below the Mortgage Interest Rate in year one, the
subsidized rate  will increase  to  four percentage  points below  the  Mortgage
Interest Rate in year two, and likewise until year six, when the subsidized rate
will  equal the Mortgage Interest Rate. Where the subsidy agreements relating to
Subsidy Loans are in effect for longer than five years, the subsidized  interest
rates  generally increase  at smaller percentage  increments for  each year. The
subsidy agreements  relating  to  Subsidy  Loans  made  under  a  fixed  program
generally  will  provide  for  subsidized interest  rates  at  fixed percentages
(generally one percentage  point to  two percentage points)  below the  Mortgage
Interest  Rates for  specified periods,  generally not  in excess  of ten years.
Subsidy Loans are also offered pursuant to combination fixed/graduated programs.
The subsidy agreements relating to such Subsidy Loans generally will provide for
an initial  fixed subsidy  of up  to five  percentage points  below the  related
Mortgage  Interest Rate for up  to five years, and  then a periodic reduction in
the subsidy for up to  five years, at an equal  fixed percentage per year  until
the subsidized rate equals the Mortgage Interest Rate.
 
    Generally,  employers may terminate subsidy programs in the event of (i) the
mortgagor's death, retirement,  resignation or termination  of employment,  (ii)
the  full prepayment  of the Subsidy  Loan by  the mortgagor, (iii)  the sale or
transfer by the mortgagor of the related Mortgaged Property as a result of which
the mortgagee  is  entitled to  accelerate  the  Subsidy Loan  pursuant  to  the
"due-on-sale"  clause contained  in the  Mortgage, or  (iv) the  commencement of
foreclosure proceedings or the acceptance of  a deed in lieu of foreclosure.  In
addition,  some  subsidy programs  provide that  if  prevailing market  rates of
interest on mortgage loans similar to a Subsidy Loan are less than the  Mortgage
Interest  Rate of such Subsidy Loan, the employer may request that the mortgagor
refinance such Subsidy Loan and may  terminate the related subsidy agreement  if
the  mortgagor fails to refinance such Subsidy  Loan. In the event the mortgagor
refinances such Subsidy Loan,  the new loan  will not be  included in the  Trust
Estate. See "Prepayment and Yield Considerations" herein. In the event a subsidy
agreement  is terminated,  the amount remaining  in the Subsidy  Account will be
returned to the employer, and the mortgagor  will be obligated to make the  full
 
                                       14
<PAGE>
amount  of all  remaining scheduled  payments, if  any. The  mortgagor's reduced
monthly housing expense as a consequence  of payments under a subsidy  agreement
is  used by  PHMC in  determining certain  expense-to-income ratios  utilized in
underwriting a Subsidy Loan. See "PHMC--Mortgage Loan Underwriting."
 
    If so specified in the applicable Prospectus Supplement, a Trust Estate  may
contain  Mortgage Loans subject  to temporary buy-down  plans ("Buy-Down Loans")
pursuant to which the  monthly payments made by  the mortgagor during the  early
years  of the Mortgage Loan will be  less than the scheduled monthly payments on
the Mortgage Loan. The resulting difference  in payment will be compensated  for
from  an amount contributed by  the seller of the  related Mortgaged Property or
another source, including the  originator of the Mortgage  Loan (generally on  a
present  value basis) and, if so specified in the related Prospectus Supplement,
placed in a  custodial account  (the "Buy-Down Fund")  by the  Servicer. If  the
mortgagor  on a  Buy-Down Loan  prepays such Mortgage  Loan in  its entirety, or
defaults on such Mortgage Loan and the Mortgaged Property is sold in liquidation
thereof, during the period  when the mortgagor is  not obligated, on account  of
the  buy-down plan, to pay the full  monthly payment otherwise due on such loan,
the unpaid  principal balance  of such  Buy-Down  Loan will  be reduced  by  the
amounts  remaining in the Buy-Down Fund with  respect to such Buy-Down Loan, and
such amounts will be deposited in  the Certificate Account (as defined  herein),
net  of any  amounts paid  with respect  to such  Buy-Down Loan  by any insurer,
guarantor or other person pursuant to a credit enhancement arrangement described
in the applicable Prospectus Supplement.
 
    If so specified in the applicable Prospectus Supplement, a Trust Estate  may
include  Mortgage Loans which are amortized over 30 years but which have shorter
terms to maturity (each  such Mortgage Loan, a  "Balloon Loan") that causes  the
outstanding principal balance of the related Mortgage Loan to be due and payable
at  the  end  of  a  certain specified  period  (the  "Balloon  Period"). Unless
otherwise specified in  the applicable  Prospectus Supplement,  the borrower  of
such  Balloon Loan  will be  obligated to  pay the  entire outstanding principal
balance of the Balloon  Loan at the  end of the related  Balloon Period. In  the
event  PHMC refinances a mortgagor's Balloon Loan at maturity, the new loan will
not be included in the Trust  Estate. See "Prepayment and Yield  Considerations"
herein.  A Trust Estate  may also include  other types of  Mortgage Loans to the
extent set forth in the applicable Prospectus Supplement.
 
  INSURANCE POLICIES
 
    The Pooling and Servicing Agreement will require the Servicer to cause to be
maintained for each Mortgage Loan a standard hazard insurance policy issued by a
generally acceptable insurer insuring the improvements on the Mortgaged Property
underlying such Mortgage Loan  against loss by fire,  with extended coverage  (a
"Standard  Hazard Insurance Policy").  The Pooling and  Servicing Agreement will
require that such  Standard Hazard  Insurance Policy be  in an  amount at  least
equal  to the lesser of  100% of the insurable value  of the improvements on the
Mortgaged Property or  the principal  balance of such  Mortgage Loan;  provided,
however, that such insurance may not be less than the minimum amount required to
fully  compensate  for any  damage  or loss  on  a replacement  cost  basis. The
Servicer will also maintain  on property acquired upon  foreclosure, or deed  in
lieu of foreclosure, of any Mortgage Loan, a Standard Hazard Insurance Policy in
an amount that is at least equal to the lesser of 100% of the insurable value of
the  improvements which are a part of  such property or the principal balance of
such Mortgage Loan  plus accrued  interest and  liquidation expenses;  provided,
however, that such insurance may not be less than the minimum amount required to
fully compensate for any damage or loss on a replacement cost basis. Any amounts
collected  under any  such policies  (other than  amounts to  be applied  to the
restoration or repair of the Mortgaged  Property or released to the borrower  in
accordance   with  normal  servicing  procedures)   will  be  deposited  in  the
Certificate Account.
 
    The Standard Hazard Insurance Policies covering the Mortgage Loans generally
will cover  physical damage  to,  or destruction  of,  the improvements  on  the
Mortgaged Property caused by fire, lightning, explosion, smoke, windstorm, hail,
riot,  strike  and civil  commotion, subject  to  the conditions  and exclusions
particularized in each  policy. Because the  Standard Hazard Insurance  Policies
relating  to such Mortgage Loans will  be underwritten by different insurers and
will cover Mortgaged Properties located in various
 
                                       15
<PAGE>
states, such policies will not contain identical terms and conditions. The  most
significant  terms thereof, however,  generally will be  determined by state law
and generally will be similar. Most  such policies typically will not cover  any
physical  damage  resulting from  the  following: war,  revolution, governmental
actions, floods  and  other  water-related  causes,  earth  movement  (including
earthquakes, landslides and mudflows), nuclear reaction, wet or dry rot, vermin,
rodents,  insects or domestic animals, hazardous wastes or hazardous substances,
theft and, in certain cases, vandalism. The foregoing list is merely  indicative
of certain kinds of uninsured risks and is not all-inclusive.
 
    The Servicer may maintain a blanket policy insuring against hazard losses on
all  of the  Mortgaged Properties in  lieu of maintaining  the required Standard
Hazard Insurance Policies.  The Servicer will  be liable for  the amount of  any
deductible  under a blanket policy  if such amount would  have been covered by a
required Standard Hazard Insurance Policy, had it been maintained.
 
    In general, if the  improvements on a Mortgaged  Property are located in  an
area  identified in  the Federal  Register by  the Federal  Emergency Management
Agency as having special flood hazards  (and such flood insurance has been  made
available)  the Pooling  and Servicing  Agreement will  require the  Servicer to
cause to be maintained a flood insurance policy meeting the requirements of  the
current  guidelines  of the  Federal Insurance  Administration with  a generally
acceptable insurance  carrier. Generally,  the Pooling  and Servicing  Agreement
will  require that such flood insurance be in  an amount not less than the least
of (i) the  outstanding principal balance  of the Mortgage  Loan, (ii) the  full
insurable  value of the  improvements, or (iii) the  maximum amount of insurance
which is available under the Flood Disaster Protection Act of 1973, as  amended.
PHMC does not provide financing for flood zone properties located in communities
not  participating  in  the National  Flood  Insurance Program  or  if available
insurance coverage is, in its judgment, unrealistically low.
 
    Any losses incurred with  respect to Mortgage Loans  due to uninsured  risks
(including  earthquakes,  mudflows,  floods and  hazardous  wastes  or hazardous
substances) or insufficient hazard insurance proceeds could affect distributions
to the Certificateholders.
 
  ACQUISITION OF THE MORTGAGE LOANS FROM PHMC
 
    The Seller will  have acquired  the Mortgage  Loans included  in each  Trust
Estate from PHMC. In connection with the conveyance of the Mortgage Loans to the
Seller,  PHMC will (i) agree to deliver to the Seller all of the documents which
the  Seller  is  required  to  deliver   to  the  Trustee;  (ii)  make   certain
representations  and warranties to the Seller which will be the basis of certain
of the Seller's representations and warranties  to the Trustee; and (iii)  agree
to  repurchase or substitute for any Mortgage Loan for which any document is not
delivered or is  found to  be defective  in any  material respect,  or which  is
discovered  at any time  not to be  in conformance with  the representations and
warranties PHMC has made to the Seller, if PHMC cannot deliver such document  or
cure  such defect or breach within 60  days after notice thereof. Such agreement
will inure to  the benefit of  the Trustee and  is intended to  help ensure  the
Seller's  performance of its limited obligation  to repurchase or substitute for
Mortgage Loans. See "The  Trust Estates--Mortgage Loans--Assignment of  Mortgage
Loans to the Trustee," and "--Representations and Warranties."
 
  ASSIGNMENT OF MORTGAGE LOANS TO THE TRUSTEE
 
    At  the time of issuance of each  Series of Certificates, the Mortgage Loans
in the  related  Trust Estate  will,  pursuant  to the  applicable  Pooling  and
Servicing Agreement, be assigned to the Trustee, together with all principal and
interest received on or with respect to such Mortgage Loans after the applicable
Cut-Off Date other than principal and interest due and payable on or before such
Cut-Off  Date  and interest  attributable to  the Fixed  Retained Yield  on such
Mortgage Loans, if  any. See  "Servicing of the  Mortgage Loans--Fixed  Retained
Yield, Servicing Compensation and Payment of Expenses." The Trustee or its agent
will,   concurrently  with   such  assignment,  authenticate   and  deliver  the
Certificates evidencing such Series to the  Seller in exchange for the  Mortgage
Loans.  Each Mortgage  Loan will  be identified  in a  schedule appearing  as an
exhibit to the applicable  Pooling and Servicing  Agreement. Each such  schedule
will  include, among other things, the unpaid  principal balance as of the close
of business on the applicable Cut-Off  Date, the maturity date and the  Mortgage
Interest Rate for each Mortgage Loan in the related Trust Estate.
 
                                       16
<PAGE>
    In  addition, with  respect to  each Mortgage  Loan in  a Trust  Estate, the
mortgage or other promissory note, any assumption, modification or conversion to
fixed interest rate agreement, a mortgage assignment in recordable form and  the
recorded  Mortgage (or other  documents as are required  under applicable law to
create a perfected security interest in  the Mortgaged Property in favor of  the
Trustee)  will  be delivered  to  the Trustee  (or  to a  designated custodian);
provided that, in instances where recorded documents cannot be delivered due  to
delays  in connection with recording, copies thereof, certified by the Seller to
be true  and  complete copies  of  such documents  sent  for recording,  may  be
delivered  and the original  recorded documents will  be delivered promptly upon
receipt. As to each Mortgage Loan for which there is primary mortgage insurance,
the certificate of primary mortgage insurance will be delivered to the  Trustee.
The  assignment of  each Mortgage  will be  recorded promptly  after the initial
issuance of Certificates for the related  Trust Estate, except in states  where,
in  the opinion  of counsel  acceptable to  the Trustee,  such recording  is not
required to protect  the Trustee's  interest in  the Mortgage  Loan against  the
claim  of  any subsequent  transferee or  any  successor to  or creditor  of the
Seller, PHMC or the originator of such Mortgage Loan.
 
    The  Trustee  will  hold  such  documents  in  trust  for  the  benefit   of
Certificateholders  of the related Series and  will review such documents within
45 days of the date  of the applicable Pooling  and Servicing Agreement. If  any
document  is not delivered or is found  to be defective in any material respect,
or if the  Seller is  in breach  of any  of its  representations and  warranties
contained  in such Pooling  and Servicing Agreement,  and such breach materially
and adversely  affects the  interests of  the Certificateholders  in a  Mortgage
Loan,  and the Seller cannot deliver such document or cure such defect or breach
within 60 days after written notice thereof, the Seller will, within 60 days  of
such  notice, either repurchase the related Mortgage  Loan from the Trustee at a
price equal  to the  then unpaid  principal balance  thereof, plus  accrued  and
unpaid  interest  at  the applicable  Mortgage  Interest Rate  (minus  any Fixed
Retained Yield) through the last day of the month in which such repurchase takes
place, or (in  the case of  a Series for  which a REMIC  election will be  made,
unless  the  maximum  period  as  may be  provided  by  the  Code  or applicable
regulations of the  Department of  the Treasury  ("Treasury Regulations")  shall
have  elapsed  since  the  execution of  the  applicable  Pooling  and Servicing
Agreement) substitute  for  such  Mortgage  Loan  a  new  mortgage  loan  having
characteristics  such that the representations and warranties of the Seller made
pursuant  to  the  applicable  Pooling  and  Servicing  Agreement  (except   for
representations  and warranties as to the correctness of the applicable schedule
of mortgage loans) would  not have been incorrect  had such substitute  Mortgage
Loan  originally been  a Mortgage  Loan. In the  case of  a repurchased Mortgage
Loan, the  purchase  price  will be  deposited  by  the Seller  in  the  related
Certificate  Account. In  the case of  a substitute Mortgage  Loan, the mortgage
file relating thereto will  be delivered to the  Trustee (or the custodian)  and
the Seller will deposit in the Certificate Account an amount equal to the excess
of  (i) the unpaid principal  balance of the Mortgage  Loan which is substituted
for, over (ii)  the unpaid principal  balance of the  substitute Mortgage  Loan,
together  with interest on such excess at  the Net Mortgage Interest Rate to the
next scheduled Due  Date of  the Mortgage Loan  which is  being substituted  for
(adjusted,  in the case of a Series for  which a REMIC election will be made, as
set forth in the applicable Pooling and Servicing Agreement, to ensure that  the
Trustee  will not recognize gain). In no event will any substitute Mortgage Loan
have an unpaid principal  balance greater than  the Scheduled Principal  Balance
(as  defined herein)  of the  Mortgage Loan for  which it  is substituted (after
giving  effect  to  the  scheduled  principal  payment  due  in  the  month   of
substitution  on the Mortgage Loan  substituted for), or a  term greater than, a
Mortgage Interest Rate less than, a Mortgage Interest Rate more than one percent
per annum greater than  or a Loan-to-Value greater  than, the Mortgage Loan  for
which  it is substituted. If  substitution is to be  made for an adjustable rate
Mortgage Loan,  the  substitute Mortgage  Loan  will have  an  unpaid  principal
balance no greater than the Scheduled Principal Balance of the Mortgage Loan for
which  it is substituted (after giving effect to the scheduled principal payment
due in  the month  of substitution  on  the Mortgage  Loan substituted  for),  a
Loan-to-Value Ratio less than or equal to, and a Mortgage Interest Rate at least
equal  to, that of the Mortgage Loan for  which it is substituted, and will bear
interest based on  the same  index, margin and  frequency of  adjustment as  the
substituted   Mortgage  Loan.  Unless  otherwise  specified  in  the  applicable
Prospectus Supplement, the repurchase  obligation and the mortgage  substitution
referred   to  above  will  constitute  the   sole  remedies  available  to  the
Certificateholders or the Trustee with respect to
 
                                       17
<PAGE>
missing or defective  documents or  breach of the  Seller's representations  and
warranties. Notwithstanding the above, if an election is made to treat the Trust
Estate  (or a  segregated pool of  assets therein)  with respect to  a Series of
Certificates as  a  REMIC  (see  "Certain  Federal  Income  Tax  Consequences"),
substitutions  will be made  only upon receipt  by the Trustee  of an opinion of
counsel or other evidence  satisfactory to the Trustee  to the effect that  such
substitution  will not cause the Trust Estate  (or segregated pool of assets) to
be subject  to the  tax on  "prohibited transactions"  imposed by  Code  Section
860F(a),  otherwise subject the  Trust Estate (or segregated  pool of assets) to
tax, cause any replacement mortgage  not to constitute a "qualified  replacement
mortgage"  within the  meaning of  Code Section  860G(a)(4), or  cause the Trust
Estate (or segregated pool of  assets) to fail to qualify  as a REMIC. See  "The
Trust  Estates--Mortgage Loans" with  respect to certain  obligations of PHMC in
connection with  defective documentation  and  breaches of  representations  and
warranties as to the Mortgage Loans.
 
    The Trustee will be authorized to appoint a custodian to maintain possession
of  the documents relating  to the Mortgage  Loans and to  conduct the review of
such documents  described  above.  The  custodian  will  keep  and  review  such
documents as the Trustee's agent under a custodial agreement.
 
  REPRESENTATIONS AND WARRANTIES
 
    Unless  otherwise provided in the applicable Pooling and Servicing Agreement
for a Series, the Seller will represent and warrant to the Trustee, among  other
things, that as of the date of execution of the Pooling and Servicing Agreement,
with respect to the Mortgage Loans, or each Mortgage Loan, as the case may be:
 
        (i)    the  information set  forth  in  the schedule  of  Mortgage Loans
    appearing as an exhibit to such  Pooling and Servicing Agreement is  correct
    in  all  material  respects  at  the date  or  dates  respecting  which such
    information is furnished as specified therein;
 
        (ii) immediately prior  to the transfer  and assignment contemplated  by
    the Pooling and Servicing Agreement, the Seller is the sole owner and holder
    of  the Mortgage Loan, free and clear of any and all liens, pledges, charges
    or security interests of any nature and has full right and authority to sell
    and assign the same;
 
        (iii) the Mortgage is a valid, subsisting and enforceable first lien  on
    the related Mortgaged Property, and the Mortgaged Property is free and clear
    of  all encumbrances and  liens having priority  over the first  lien of the
    Mortgage except for liens for real estate taxes and special assessments  not
    yet  due and payable and liens or interests  arising under or as a result of
    any federal,  state  or  local  law, regulation  or  ordinance  relating  to
    hazardous  wastes or hazardous substances; and, if the Mortgaged Property is
    a condominium unit, any  lien for common charges  permitted by statute;  and
    any  security agreement, chattel mortgage or equivalent document related to,
    and delivered to the Trustee with, any Mortgage establishes in the Seller  a
    valid  first lien on the property described  therein and the Seller has full
    right to sell and assign the same to the Trustee;
 
        (iv) neither the  Seller nor  any prior holder  of the  Mortgage or  the
    related  Mortgage Note  has modified the  Mortgage in  any material respect;
    satisfied, cancelled or  subordinated the Mortgage  or the related  Mortgage
    Note  in whole or in part; or released the Mortgaged Property in whole or in
    part from the lien of the  Mortgage; or executed any instrument of  release,
    cancellation, modification or satisfaction, except in each case as reflected
    in  a document  delivered by  the Seller  to the  Trustee together  with the
    related Mortgage;
 
        (v) all taxes, governmental assessments, insurance premiums, and  water,
    sewer  and municipal charges previously due and  owing have been paid, or an
    escrow of funds in  an amount sufficient  to pay for  every such item  which
    remains  unpaid has been established to the extent permitted by law; and the
    Seller has not advanced funds  or received any advance  of funds by a  party
    other  than the  mortgagor, directly or  indirectly (except  pursuant to any
    Buy-Down Loan or Subsidy Loan arrangement), for the
 
                                       18
<PAGE>
    payment of any amount required by the Mortgage, except for interest accruing
    from the date of the  related Mortgage Note or  date of disbursement of  the
    Mortgage Loan proceeds, whichever is later, to the date which precedes by 30
    days the first Due Date under the related Mortgage Note;
 
        (vi)  to  the best  of the  Seller's knowledge,  there is  no proceeding
    pending or threatened for the total or partial condemnation of the Mortgaged
    Property and the Mortgaged Property is undamaged by water, fire,  earthquake
    or  earth movement, windstorm, flood, tornado or similar casualty (excluding
    casualty from the presence of  hazardous wastes or hazardous substances,  as
    to  which the Seller makes no representation), so as to affect adversely the
    value of the Mortgaged Property as security for the Mortgage Loan or the use
    for which the premises were intended;
 
        (vii) the Mortgaged  Property is free  and clear of  all mechanics'  and
    materialmen's  liens or liens in the nature thereof; provided, however, that
    this warranty shall  be deemed  not to  have been made  at the  time of  the
    initial  issuance  of  the  Certificates if  a  title  policy  affording, in
    substance, the same protection afforded by this warranty is furnished to the
    Trustee by the Seller;
 
        (viii) except for Mortgage Loans secured by shares in cooperatives,  the
    Mortgaged  Property consists  of a  fee simple  or leasehold  estate in real
    property, all of  the improvements  which are  included for  the purpose  of
    determining  the appraised value of the Mortgaged Property lie wholly within
    the boundaries  and  building restriction  lines  of such  property  and  no
    improvements  on adjoining  properties encroach upon  the Mortgaged Property
    (unless insured against under the applicable title insurance policy) and, to
    the  best  of  the  Seller's  knowledge,  the  Mortgaged  Property  and  all
    improvements  thereon comply with all  requirements of any applicable zoning
    and subdivision laws and ordinances;
 
        (ix) the Mortgage  Loan meets, or  is exempt from,  applicable state  or
    federal  laws, regulations and  other requirements pertaining  to usury, and
    the Mortgage Loan is not usurious;
 
        (x) to the best of the Seller's knowledge, all inspections, licenses and
    certificates required to  be made  or issued  with respect  to all  occupied
    portions  of  the  Mortgaged  Property  and, with  respect  to  the  use and
    occupancy of  the  same, including,  but  not limited  to,  certificates  of
    occupancy  and fire  underwriting certificates,  have been  made or obtained
    from the appropriate authorities;
 
        (xi) all payments  required to be  made up to  the Due Date  immediately
    preceding  the Cut-Off Date  for such Mortgage  Loan under the  terms of the
    related Mortgage Note have been made;
 
        (xii) the  Mortgage  Note, the  related  Mortgage and  other  agreements
    executed  in connection therewith are genuine,  and each is the legal, valid
    and binding obligation of the maker thereof, enforceable in accordance  with
    its  terms  except  as  such  enforcement  may  be  limited  by  bankruptcy,
    insolvency, reorganization or other  similar laws affecting the  enforcement
    of  creditors' rights generally and by general equity principles (regardless
    of whether such enforcement  is considered in a  proceeding in equity or  at
    law);  and,  to the  best  of the  Seller's  knowledge, all  parties  to the
    Mortgage Note and the  Mortgage had legal capacity  to execute the  Mortgage
    Note  and the Mortgage and each Mortgage Note and Mortgage has been duly and
    properly executed by the mortgagor;
 
        (xiii) any and all requirements of any federal, state or local law  with
    respect  to  the  origination  of  the  Mortgage  Loans  including,  without
    limitation, truth-in-lending,  real estate  settlement procedures,  consumer
    credit protection, equal credit opportunity or disclosure laws applicable to
    the Mortgage Loans have been complied with;
 
        (xiv)  the proceeds  of the  Mortgage Loans  have been  fully disbursed,
    there is  no requirement  for future  advances thereunder  and any  and  all
    requirements as to completion of any on-site or off-site improvements and as
    to  disbursements  of any  escrow funds  therefor  have been  complied with,
    except for escrow funds for exterior items which could not be completed  due
    to  weather; and all costs, fees and expenses incurred in making, closing or
    recording the  Mortgage Loan  have  been paid,  except recording  fees  with
    respect  to  Mortgages  not recorded  as  of  the date  of  the  Pooling and
    Servicing Agreement;
 
                                       19
<PAGE>
        (xv) the Mortgage Loan  (except any Mortgage  Loan secured by  Mortgaged
    Property  located in  Iowa, as to  which an  opinion of counsel  of the type
    customarily rendered in  such State in  lieu of title  insurance is  instead
    received)  is covered by  an ALTA mortgagee title  insurance policy or other
    generally acceptable  form of  policy  or insurance  acceptable to  FNMA  or
    FHLMC,  issued by a title  insurer acceptable to FNMA  or FHLMC insuring the
    originator, its successors and assigns, as to the first priority lien of the
    Mortgage in the original principal amount  of the Mortgage Loan and  subject
    only  to (A) the lien of current real property taxes and assessments not yet
    due and payable, (B) covenants, conditions and restrictions,  rights-of-way,
    easements  and other matters of public record as of the date of recording of
    such Mortgage acceptable  to mortgage  lending institutions in  the area  in
    which  the Mortgaged Property is located  or specifically referred to in the
    appraisal performed  in  connection  with the  origination  of  the  related
    Mortgage  Loan, (C)  liens created pursuant  to any federal,  state or local
    law, regulation or ordinance  affording liens for the  costs of clean-up  of
    hazardous   substances  or  hazardous  wastes  or  for  other  environmental
    protection purposes and (D) such other matters to which like properties  are
    commonly  subject which do not individually, or in the aggregate, materially
    interfere with the benefits of the  security intended to be provided by  the
    Mortgage;  the Seller is the sole  insured of such mortgagee title insurance
    policy, the  assignment to  the Trustee  of the  Seller's interest  in  such
    mortgagee  title  insurance  policy  does  not  require  any  consent  of or
    notification to  the insurer  which  has not  been  obtained or  made,  such
    mortgagee  title insurance policy is in full force and effect and will be in
    full force and effect and inure to the benefit of the Trustee and no  claims
    have  been made  under such mortgagee  title insurance policy,  and no prior
    holder of the related  Mortgage, including the Seller,  has done, by act  or
    omission,  anything which would impair the  coverage of such mortgagee title
    insurance policy;
 
        (xvi) the Mortgaged Property securing  each Mortgage Loan is insured  by
    an insurer acceptable to FNMA or FHLMC against loss by fire and such hazards
    as  are covered under a standard extended coverage endorsement, in an amount
    which is not  less than the  lesser of 100%  of the insurable  value of  the
    Mortgaged  Property and  the outstanding  principal balance  of the Mortgage
    Loan, but  in no  event less  than  the minimum  amount necessary  to  fully
    compensate  for  any damage  or loss  on  a replacement  cost basis;  if the
    Mortgaged Property is a condominium unit, it is included under the  coverage
    afforded  by a blanket  policy for the  project; if upon  origination of the
    Mortgage Loan, the improvements  on the Mortgaged Property  were in an  area
    identified  in  the Federal  Register  by the  Federal  Emergency Management
    Agency as having special flood hazards, a flood insurance policy meeting the
    requirements  of   the  current   guidelines   of  the   Federal   Insurance
    Administration  is in effect with  a generally acceptable insurance carrier,
    in an  amount representing  coverage not  less  than the  least of  (A)  the
    outstanding  principal balance of the Mortgage  Loan, (B) the full insurable
    value and (C) the maximum amount of insurance which was available under  the
    Flood  Disaster  Protection Act  of 1973;  and  each Mortgage  obligates the
    mortgagor thereunder to maintain all such insurance at the mortgagor's  cost
    and expense;
 
        (xvii)  to  the best  of the  Seller's knowledge,  there is  no default,
    breach, violation or event  of acceleration existing  under any Mortgage  or
    the  related Mortgage Note and  no event which, with  the passage of time or
    with notice and the expiration of any grace or cure period, would constitute
    a default, breach, violation  or event of acceleration;  and the Seller  has
    not  waived  any default,  breach, violation  or  event of  acceleration; no
    foreclosure action is threatened or has  been commenced with respect to  the
    Mortgage Loan;
 
        (xviii)  no  Mortgage  Note  or  Mortgage is  subject  to  any  right of
    rescission, set-off,  counterclaim  or  defense, including  the  defense  of
    usury,  nor will the operation  of any of the terms  of the Mortgage Note or
    Mortgage, or  the exercise  of any  right thereunder,  render such  Mortgage
    unenforceable,  in  whole  or  in  part,  or  subject  it  to  any  right of
    rescission, set-off,  counterclaim  or  defense, including  the  defense  of
    usury, and no such right of rescission, set-off, counterclaim or defense has
    been asserted with respect thereto;
 
                                       20
<PAGE>
        (xix)  each Mortgage Note  is payable in  monthly payments, resulting in
    complete amortization of the Mortgage Loan over a term of not more than  360
    months;
 
        (xx) each Mortgage contains customary and enforceable provisions such as
    to  render the rights  and remedies of  the holder thereof  adequate for the
    realization against the Mortgaged Property of the benefits of the  security,
    including  realization by  judicial foreclosure  (subject to  any limitation
    arising from  any bankruptcy,  insolvency or  other law  for the  relief  of
    debtors),  and there  is no  homestead or  other exemption  available to the
    mortgagor which would interfere with such right of foreclosure;
 
        (xxi) to the best of the Seller's knowledge, no mortgagor is a debtor in
    any state or federal bankruptcy or insolvency proceeding;
 
        (xxii) each  Mortgaged Property  is  located in  the United  States  and
    consists of a one- to four-unit single family residential property which may
    include a detached home, townhouse, condominium unit, unit in a planned unit
    development or a leasehold interest with respect to any of the foregoing or,
    in  the case of Mortgage Loans secured  by shares of cooperatives, leases or
    occupancy agreements;
 
        (xxiii) no payment required under any Mortgage Loan is more than 30 days
    past due and no Mortgage Loan had more than one delinquency in the preceding
    13 months; and
 
        (xxiv) with respect to  each Buy-Down Loan, the  funds deposited in  the
    Buy-Down Fund, if any, will be sufficient, together with interest thereon at
    the  rate  customarily  received by  the  Seller on  such  funds, compounded
    monthly, and adding  the amounts required  to be paid  by the mortgagor,  to
    make  the scheduled payments stated in the Mortgage Note for the term of the
    buy-down agreement.
 
    No representations or warranties are made by the Seller as to the absence or
effect of  hazardous wastes  or hazardous  substances on  any of  the  Mortgaged
Properties  or on the lien of any  Mortgage, and any loss or liability resulting
from the presence  or effect of  such hazardous wastes  or hazardous  substances
will  be borne solely  by Certificateholders. See "Certain  Legal Aspects of the
Mortgage Loans--Environmental Considerations" below.
 
    See "The Trust  Estates--Mortgage Loans"  for a description  of the  limited
remedies  available in connection with breaches of the foregoing representations
and warranties.
 
  OPTIONAL REPURCHASES
 
    The Seller may, at its option, repurchase any defaulted Mortgage Loan if, in
the Seller's judgment,  the related default  is not  likely to be  cured by  the
borrower,  at a price equal to the unpaid principal balance thereof plus accrued
interest thereon and under the conditions set forth in the applicable Prospectus
Supplement.
 
                        DESCRIPTION OF THE CERTIFICATES
 
GENERAL
 
    Each Series  of  Certificates will  be  issued  pursuant to  a  Pooling  and
Servicing  Agreement (the "Pooling and Servicing Agreement") between the Seller,
the Servicer, and  the Trustee  named in the  applicable Prospectus  Supplement.
Each  Pooling and Servicing Agreement will  contain substantially the same terms
and conditions, except  for revisions  of defined terms  and certain  provisions
regarding  distributions to Certificateholders, credit support and other similar
matters. Illustrative forms of Pooling  and Servicing Agreement have been  filed
as  exhibits to the Registration  Statement of which this  Prospectus is a part.
The following summaries describe certain  provisions common to the  Certificates
and  to each Pooling and Servicing Agreement. The summaries do not purport to be
complete and are subject  to, and are qualified  in their entirety by  reference
to, all of the provisions of the Pooling and Servicing Agreement for each Series
of  Certificates and  the applicable Prospectus  Supplement. Wherever particular
sections or defined terms of
 
                                       21
<PAGE>
the Pooling and Servicing  Agreement are referred to,  such sections or  defined
terms are thereby incorporated herein by reference from the forms of Pooling and
Servicing Agreement filed as exhibits to the Registration Statement.
 
    Each  Series  of  Certificates  will represent  ownership  interests  in the
related Trust Estate. An election  may be made to treat  the Trust Estate (or  a
segregated pool of assets therein) with respect to a Series of Certificates as a
REMIC.  If such  an election is  made, such Series  will consist of  one or more
Classes of  Certificates  that will  represent  "regular interests"  within  the
meaning  of Code Section 860G(a)(1) (such Class or Classes collectively referred
to as the "Regular Certificates") and one Class or Subclass of Certificates with
respect to each REMIC that will be designated as "residual interests" within the
meaning of Code  Section 860G(a)(2) (the  "Residual Certificates")  representing
the right to receive distributions as specified in the Prospectus Supplement for
such Series. See "Certain Federal Income Tax Consequences" herein.
 
    The  Seller may sell certain Classes or  Subclasses of the Certificates of a
Series, including one or more Classes of Subordinated Certificates, in privately
negotiated transactions  exempt  from  registration under  the  Securities  Act.
Alternatively,  if  so specified  in a  Prospectus  Supplement relating  to such
Subordinated Certificates,  the Seller  may offer  one or  more Classes  of  the
Subordinated  Certificates  of a  Series by  means of  this Prospectus  and such
Prospectus Supplement.
 
    Unless otherwise  specified in  the  applicable Prospectus  Supplement  with
respect  to a Series of Certificates, each Certificate offered hereby and by the
applicable Prospectus Supplement will  be issued in  fully registered form.  The
Certificates  of  a  Series  offered  hereby  and  by  means  of  the applicable
Prospectus Supplements will be  transferable and exchangeable  at the office  or
agency maintained by the Trustee or such other entity for such purpose set forth
in  the related Prospectus  Supplement. No service  charge will be  made for any
transfer or exchange of Certificates, but  the Trustee or such other entity  may
require  payment of  a sum  sufficient to  cover any  tax or  other governmental
charge in  connection with  such transfer  or  exchange. In  the event  that  an
election  is made  to treat  the Trust  Estate (or  a segregated  pool of assets
therein) as a REMIC, no  legal or beneficial interest in  all or any portion  of
the  "residual interest" thereof  may be transferred without  the receipt by the
transferor of an affidavit signed by the transferee stating that the  transferee
is not a disqualified organization within the meaning of Code Section 860E(e) or
an  agent (including  a broker, nominee,  or middleman) thereof  or a Book-Entry
Nominee   (as    defined   herein).    See   "Certain    Federal   Income    Tax
Consequences--Federal  Income Tax Consequences for REMIC Certificates-- Taxation
of Residual  Certificates--Tax-Related  Restrictions  on  Transfer  of  Residual
Certificates."  In the  event that an  election is  not made to  treat the Trust
Estate (or a  segregated pool  of assets therein)  as a  REMIC, no  Subordinated
Certificate  may be  transferred unless  an appropriate  ruling of  the Internal
Revenue Service  or  opinion of  counsel  is obtained  to  the effect  that  the
transfer  will not result in the  arrangement contemplated under the Pooling and
Servicing Agreement being  treated as  an association taxable  as a  corporation
under the Code.
 
    Unless   otherwise  specified  in   the  applicable  Prospectus  Supplement,
distributions  to  Certificateholders  of  all  Series  (other  than  the  final
distribution  in retirement of the Certificates) will be made by check mailed to
the address of  the person  entitled thereto as  it appears  on the  certificate
register,  except that, with  respect to any holder  of a Certificate evidencing
not less  than  a certain  minimum  denomination  set forth  in  the  applicable
Prospectus   Supplement,  distributions  will  be   made  by  wire  transfer  in
immediately available funds,  provided that  the Servicer, or  the Paying  Agent
acting  on behalf  of the Servicer,  shall have been  furnished with appropriate
wiring instructions  not less  than three  business days  prior to  the  related
Distribution  Date. The final distribution in retirement of Certificates will be
made only upon presentation and surrender  of the Certificates at the office  or
agency  maintained by the Trustee or other entity for such purpose, as specified
in the final distribution notice to Certificateholders.
 
    A Series of  Certificates will consist  of one or  more Classes of  Standard
Certificates   or  Stripped  Certificates  (referred  to  hereinafter  sometimes
collectively as "Percentage Certificates") or two or more Classes of Multi-Class
Certificates (each as described below).
 
                                       22
<PAGE>
PERCENTAGE CERTIFICATES
 
    Each Series of Percentage  Certificates may include one  or more Classes  of
Standard  Certificates  or  Stripped Certificates,  any  Class of  which  may be
divided into two  or more Subclasses.  The Standard Certificates  of each  Class
will  evidence  fractional  undivided  interests in  all  of  the  principal and
interest (to  the extent  of the  Net Mortgage  Interest Rate)  payments on  the
Mortgage  Loans comprising the Trust Estate  related to such Series. Each holder
of  a  Standard  Certificate  of  a  Class  will  be  entitled  to  receive  its
Certificate's percentage interest of the portion of the Pool Distribution Amount
(as  defined below)  allocated to  such Class.  The percentage  interest of each
Standard Certificate will be  equal to the percentage  obtained by dividing  the
aggregate  unpaid principal  balance of the  Mortgage Loans  represented by such
Standard Certificate as of  the Cut-Off Date by  the aggregate unpaid  principal
balance  of the Mortgage  Loans represented by all  the Standard Certificates of
the same Class as of the Cut-Off Date.
 
    The Stripped Certificates of each  Class will evidence fractional  undivided
interests in specified portions of the principal and/or interest payments on the
Mortgage  Loans comprising the Trust Estate  related to such Series. The holders
of the Stripped Certificates of each Class will be entitled to receive a portion
(which may be zero) as specified in the applicable Prospectus Supplement of  the
principal  distributions comprising the Pool  Distribution Amount, and a portion
(which may be zero) as specified in the applicable Prospectus Supplement of  the
interest   distributions  comprising  the  Pool   Distribution  Amount  on  each
Distribution Date.
 
    In the case of  Classes of Stripped  Certificates representing interests  in
interest  distributions on the Mortgage Loans and not in principal distributions
on the  Mortgage  Loans,  such  Certificates will  be  denominated  in  notional
amounts. The aggregate original notional amount for a Class of such Certificates
will  be equal to the aggregate unpaid principal balance (or a specified portion
thereof) of  the  Mortgage  Loans  as  of the  Cut-Off  Date  specified  in  the
applicable  Prospectus  Supplement. The  notional amount  of each  such Stripped
Certificate will  be  used to  calculate  the holder's  pro  rata share  of  the
interest distributions on the Mortgage Loans allocated to that Class and for the
determination  of  certain other  rights of  holders of  such Class  of Stripped
Certificates and will not represent an  interest in, or entitle any such  holder
to any distribution with respect to, any principal distributions on the Mortgage
Loans.  Each such Certificate's  pro rata share of  the interest distribution on
the Mortgage Loans on each Distribution  Date will be calculated by  multiplying
the  interest distributions on  the Mortgage Loans  allocated to its  Class by a
fraction, the  numerator  of which  is  the  original notional  amount  of  such
Stripped  Certificate and  the denominator  of which  is the  aggregate original
notional amount of all the Stripped Certificates of its Class.
 
    The interest of a Class of Percentage Certificates representing an  interest
in a Trust Estate (or a segregated pool of assets therein) with respect to which
an  election to be  treated as a REMIC  has been made may  be fixed as described
above or may  vary over  time as  a result  of prepayments  received and  losses
realized  on the underlying Mortgage Loans.  A Series of Percentage Certificates
comprised of Classes whose percentage interests in the Trust Estate may vary  is
referred   to  herein   as  a   Series  of   "Shifting  Interest  Certificates."
Distributions on,  and  subordination  arrangements with  respect  to,  Shifting
Interest Certificates are discussed below under the headings "Description of the
Certificates--Distributions  to Percentage Certificateholders--Shifting Interest
Certificates" and "Credit Support--Subordination--Shifting Interest
Certificates."
 
MULTI-CLASS CERTIFICATES
 
    Each Series may  include two  or more Classes  of Multi-Class  Certificates.
Each Multi-Class Certificate will be assigned a Stated Amount. The Stated Amount
may  be based on an  amount of principal of the  underlying Mortgage Loans or on
the value of  an amount  of future  cash flows  from the  related Trust  Estate,
without distinction as to principal and interest received on the Mortgage Loans.
The  initial  Stated  Amount  of  each  Class  within  a  Series  of Multi-Class
Certificates will be specified in the applicable Prospectus Supplement. Interest
on the Classes of Multi-Class Certificates will be paid at rates specified in or
determined as specified in the applicable Prospectus Supplement, and will accrue
in the manner  specified therein.  Each Series of  Multi-Class Certificates  may
include   one  or  more  Classes  of  Certificates  on  which  interest  accrues
 
                                       23
<PAGE>
but is not  payable until such  time as specified  in the applicable  Prospectus
Supplement  ("Compound Interest Certificates"), and interest accrued on any such
Class will  be  added to  the  Stated Amount  thereof  in the  manner  described
therein.
 
DISTRIBUTIONS TO PERCENTAGE CERTIFICATEHOLDERS
 
  CERTIFICATES OTHER THAN SHIFTING INTEREST CERTIFICATES
 
    Except as otherwise specified in the applicable Prospectus Supplement, on or
about  the  17th day  of each  month in  which a  Distribution Date  occurs (the
"Determination Date"), the Servicer will  determine the amount of the  principal
and interest payments on the Mortgage Loans which will be distributed to holders
of  each  Class  and  Subclass  of  Percentage  Certificates  on  the succeeding
Distribution Date. Such amounts will be  distributed, pro rata, to holders of  a
Class  or  Subclass of  Percentage  Certificates (other  than  Shifting Interest
Certificates) except, in  the case of  Subordinated Certificateholders, for  any
amounts required to be paid to the holders of the related Senior Certificates or
deposited in the related Subordination Reserve Fund,
if  any. If  the Certificates  of a  Class include  two or  more Subclasses, the
allocation of distributions of principal and interest among such Subclasses will
be as specified in the related Prospectus Supplement.
 
    CALCULATION OF  DISTRIBUTABLE  AMOUNTS.   On  each Determination  Date,  the
Servicer   will  calculate   the  "Distributable   Amount"  for   the  following
Distribution Date for each Class of Certificates. Unless otherwise specified  in
the  applicable Prospectus Supplement,  the Distributable Amount  for a Class of
Senior Certificates (a "Senior Class") of  a Series on a Distribution Date  (the
"Senior Class Distributable Amount") will be an amount equal to the sum of:
 
         (i)  the aggregate  undivided interest,  expressed as  a percentage and
    specified  in  the  applicable  Prospectus  Supplement,  evidenced  by   all
    Certificates of such Senior Class (the "Senior Class Principal Portion") of:
 
           (a)  all scheduled payments of principal on each outstanding Mortgage
       Loan  that  became  due  on  the  Due  Date  immediately  preceding  such
       Distribution  Date in accordance  with the amortization  schedules of the
       related Mortgage  Loans  (as adjusted  to  give effect  to  any  previous
       prepayments),  whether or not such payments were actually received by the
       Servicer (the aggregate of  such scheduled payments due  on any such  Due
       Date  being referred to herein as "Scheduled Principal"), and all partial
       principal prepayments applied by the Servicer in reduction of the  unpaid
       principal balance of any Mortgage Loan on or after the Determination Date
       in  the month preceding  the month in which  the Distribution Date occurs
       (or after the Cut-Off Date, in  the case of the first Distribution  Date)
       and  prior to the Determination Date occurring  in the month in which the
       Distribution Date occurs ("Curtailments");
 
           (b) all principal prepayments in full received by the Servicer during
       the month preceding the month in which such Distribution Date occurs; and
 
           (c) the  unpaid  principal balance,  less  any amounts  with  respect
       thereto  constituting Late  Payments (as herein  defined) attributable to
       principal, and  less  any  unreimbursed Periodic  Advances  with  respect
       thereto,  of each  Mortgage Loan which  was repurchased by  the Seller or
       purchased by the Servicer, as the case may be (as described in "The Trust
       Estates--Mortgage Loans--Assignment of  Mortgage Loans  to the  Trustee",
       "--Optional    Repurchases,"    and    "The    Pooling    and   Servicing
       Agreement--Termination; Purchase of Certificates"), and of each  Mortgage
       Loan in respect of which property was acquired, liquidated or foreclosed,
       and  with respect to which Liquidation  Proceeds (as defined herein) were
       received, during the month preceding the month in which such Distribution
       Date occurs,  determined as  of  the date  each  such Mortgage  Loan  was
       repurchased or purchased, as the case may be, or as of the date each such
       related  property was acquired, liquidated or foreclosed, as the case may
       be; and
 
        (ii) interest  at  the  applicable Pass-Through  Rate  from  the  second
    preceding  Due Date to the Due  Date immediately preceding such Distribution
    Date on the Senior Class Principal Portion of the
 
                                       24
<PAGE>
aggregate  principal balance of the Mortgage Loans  as of the Cut-Off Date, less
scheduled amortization of principal thereon  and any principal prepayments  with
respect  thereto through the second preceding Due Date (the "Scheduled Principal
Balance"), whether or not such interest  was actually received by the  Servicer;
provided that interest attributable to the accrual of interest on any prepaid or
liquidated  Mortgage Loan  at the Net  Mortgage Interest Rate  for such Mortgage
Loan from the date of its prepayment in full or liquidation through the last day
of  the  month  in  which  such  prepayment  in  full  or  liquidation  occurred
("Prepayment  Interest Shortfall") is included only to the extent that funds for
such purposes are available  out of the aggregate  Servicing Fees and,  provided
further,  that interest on Curtailments applied other than on a Due Date, at the
Net Mortgage  Interest Rate  for the  related  Mortgage Loan  from the  date  of
application through the end of the month in which applied ("Curtailment Interest
Shortfall"), is not included; and
 
        (iii)  the sum of (a) the portion  that was included in the Senior Class
    Distributable Amount on  a prior  Distribution Date  of the  amount of  each
    scheduled  payment of principal and interest on  a Mortgage Loan not paid by
    the mortgagor  when  due, net  of  any unreimbursed  Periodic  Advance  with
    respect  thereto that was included in the Distributable Amount of each Class
    on a prior Distribution Date but  was not included in the Pool  Distribution
    Amount  until  the  current  Distribution Date  (such  net  amount,  a "Late
    Payment"), less the  aggregate amount, if  any, received by  the holders  of
    such  Senior  Certificates  on any  prior  Distribution Date  or  Dates with
    respect to such  Late Payment  from amounts otherwise  distributable to  the
    holders  of  Subordinated  Certificates  and  from  any  credit  enhancement
    available for the benefit of the Senior Certificateholders, and (b) interest
    on the amount set forth  in clause (a) above  at the Pass-Through Rate  from
    the  Distribution Date on which such Late  Payment was first included in the
    Distributable  Amount   for  such   Senior  Certificates   to  the   current
    Distribution  Date (the "Late Payment  Period"); provided that the foregoing
    amount will  be included  in  the Senior  Class  Distributable Amount  on  a
    Distribution  Date only to  the extent such  amount is included  in the Pool
    Distribution Amount with respect to such Distribution Date.
 
    Unless otherwise  specified in  the  applicable Prospectus  Supplement,  the
Distributable  Amount for a Class of Subordinated  Certificates of a Series on a
Distribution Date (the  "Subordinated Class  Distributable Amount")  will be  an
amount equal to the sum of:
 
         (i)  the aggregate  undivided interest,  expressed as  a percentage and
    specified  in  the  applicable  Prospectus  Supplement,  evidenced  by   all
    Subordinated Certificates (the "Subordinated Class Principal Portion") of:
 
           (a) all Scheduled Principal and all Curtailments;
 
           (b) all principal prepayments in full received by the Servicer during
       the month preceding the month in which such Distribution Date occurs; and
 
           (c)  the  unpaid principal  balance,  less any  amounts  with respect
       thereto constituting Late  Payments attributable to  principal, and  less
       any unreimbursed Periodic Advances with respect thereto, of each Mortgage
       Loan  which was repurchased  by the Seller or  purchased by the Servicer,
       and of each  Mortgage Loan  in respect  of which  property was  acquired,
       liquidated  or foreclosed, and with respect to which Liquidation Proceeds
       were received,  during  the  month  preceding the  month  in  which  such
       Distribution  Date occurs, determined  as of the  date each such Mortgage
       Loan was repurchased or purchased, as the case may be, or as of the  date
       each such related property was acquired, liquidated or foreclosed, as the
       case may be; and
 
        (ii)  interest  at  the  applicable Pass-Through  Rate  from  the second
    preceding Due Date to the  Due Date immediately preceding such  Distribution
    Date  on the Subordinated Class Principal Portion of the Scheduled Principal
    Balance of the Mortgage  Loans as of the  Determination Date preceding  such
    Distribution  Date, whether or not such  interest was actually received with
    respect to the Mortgage
 
                                       25
<PAGE>
    Loans; provided that Prepayment Interest  Shortfall is included only to  the
    extent  that  funds  for  such purposes  are  available  from  the aggregate
    Servicing Fees and, provided further, that Curtailment Interest Shortfall is
    not included; and
 
        (iii) the  sum  of  (a) each  Late  Payment  that was  included  in  the
    Subordinated  Class Distributable Amount  on a prior  Distribution Date plus
    the aggregate amount, if any,  received by the Senior Certificateholders  on
    any  prior Distribution Date or Dates with respect to such Late Payment from
    amounts  otherwise   available   for  distribution   to   the   Subordinated
    Certificateholders  on such  prior Distribution Date  or Dates,  or from the
    Subordination Reserve Fund and not attributable to the Initial Deposit,  and
    (b) interest on the amount set forth in clause (a) above at the Pass-Through
    Rate during the Late Payment Period; provided that the foregoing amount will
    be   included  in  the  Subordinated  Class  Distributable  Amount  on  such
    Distribution Date only  to the extent  such amount is  included in the  Pool
    Distribution Amount with respect to such Distribution Date.
 
    DETERMINATION  OF AMOUNTS TO BE DISTRIBUTED.   Unless otherwise specified in
the applicable  Prospectus  Supplement,  funds  available  for  distribution  to
Certificateholders  of a Series of Percentage  Certificates with respect to each
Distribution Date for such Series (the  "Pool Distribution Amount") will be  the
sum  of all  previously undistributed payments  or other receipts  on account of
principal (including principal prepayments and Liquidation Proceeds, if any) and
interest on or in respect of the related Mortgage Loans received by the Servicer
after the Cut-Off Date (except for amounts due on or prior to the Cut-Off Date),
or received by the Servicer  on or prior to the  Cut-Off Date but due after  the
Cut-Off  Date, in either case received on  or prior to the Determination Date in
the month in  which such Distribution  Date occurs, plus  all Periodic  Advances
made by the Servicer with respect to payments due to be received on the Mortgage
Loans  on  the Due  Date  preceding such  Distribution  Date, but  excluding the
following:
 
        (a)  amounts  received  as  late  payments  of  principal  or   interest
    respecting  which the Servicer previously has  made one or more unreimbursed
    Periodic Advances;
 
        (b) unreimbursed Periodic Advances  with respect to liquidated  Mortgage
    Loans;
 
        (c)  those portions of each payment of interest on a particular Mortgage
    Loan which represent  (i) the  Fixed Retained Yield,  if any,  and (ii)  the
    applicable Servicing Fee, as adjusted in respect of principal prepayments in
    full  and Liquidation  Proceeds as described  in "Servicing  of the Mortgage
    Loans--Adjustment to Servicing Fee in Connection with Prepaid and Liquidated
    Mortgage Loans" below;
 
        (d)  all  amounts  representing  scheduled  payments  of  principal  and
    interest  due  after the  Due  Date occurring  in  the month  in  which such
    Distribution Date occurs;
 
        (e) all  principal  prepayments  in full  and  all  proceeds  (including
    Liquidation Proceeds) of any Mortgage Loans, or property acquired in respect
    thereof,  liquidated, foreclosed,  purchased or repurchased  pursuant to the
    applicable Pooling and  Servicing Agreement,  received on or  after the  Due
    Date  occurring in the month in which  such Distribution Date occurs and all
    Curtailments applied  by the  Servicer on  or after  the Determination  Date
    occurring  in  the month  in which  such Distribution  Date occurs,  and all
    related payments of interest on such amounts;
 
        (f)  that portion  of Liquidation Proceeds  which represents any  unpaid
    Servicing  Fee  to  which the  Servicer  is  entitled and  any  unpaid Fixed
    Retained Yield;
 
        (g) if an election has been made to treat the applicable Trust Estate as
    a REMIC, any Net Foreclosure Profits with respect to such Distribution Date.
    "Net Foreclosure Profits" with  respect to a Distribution  Date will be  the
    excess  of  (i)  the portion  of  aggregate net  Liquidation  Proceeds which
    represents the amount by  which aggregate profits  on Liquidated Loans  with
    respect  to  which  net  Liquidation Proceeds  exceed  the  unpaid principal
    balance thereof plus accrued interest thereon at the Mortgage Interest  Rate
    over  (ii) aggregate  realized losses  on Liquidated  Loans with  respect to
    which net Liquidation Proceeds  are less than  the unpaid principal  balance
    thereof plus accrued interest at the Mortgage Interest Rate.
 
                                       26
<PAGE>
        (h)  all  amounts  representing  certain  expenses  reimbursable  to the
    Servicer and other amounts  permitted to be withdrawn  by the Servicer  from
    the Certificate Account, in each case pursuant to the applicable Pooling and
    Servicing Agreement;
 
        (i)  all amounts in the nature of late fees, assumption fees, prepayment
    fees  and similar fees which the Servicer  is entitled to retain pursuant to
    the applicable Pooling and Servicing Agreement; and
 
        (j)   reinvestment  earnings on  payments  received in  respect  of  the
    Mortgage Loans.
 
    The Servicer will calculate the portion of the Distributable Amount for each
Class  of the Series that  is available to be paid  out of the Pool Distribution
Amount on such  date. The portion  so available  on a Distribution  Date to  the
Senior   Certificateholders   and   to   the   Subordinated   Certificateholders
(respectively, the "Senior Class Pro Rata Share" and the "Subordinated Class Pro
Rata Share")  will  be  the  amount  equal  to  the  product  of  (a)  the  Pool
Distribution  Amount for such date and (b)  a fraction the numerator of which is
the Distributable Amount  for such  Class on such  date and  the denominator  of
which is the sum of the Distributable Amounts for such Series on such date.
 
    On  each Distribution  Date for a  Series of  Percentage Certificates (other
than Shifting Interest Certificates), the holders of the Senior Certificates  of
such  Series will be entitled to receive the Senior Class Pro Rata Share of such
Class on such Distribution Date. In  addition, to the extent credit  enhancement
is  available on such  Distribution Date, the  Senior Certificateholders will be
entitled to receive the  amount by which the  Senior Class Distributable  Amount
plus   any  Senior  Class  Carryover  Shortfall   (as  defined  below)  on  such
Distribution Date exceeds the Senior Class  Pro Rata Share on such  Distribution
Date  (such excess  being referred to  herein as the  "Senior Class Shortfall").
Such credit  support  includes:  (a)  amounts  otherwise  distributable  to  the
Subordinated  Certificateholders on such Distribution Date and amounts available
for such  purpose in  the Subordination  Reserve Fund  as described  below;  (b)
amounts   held  in   the  Certificate   Account  for   future  distributions  to
Certificateholders;  and  (c)  amounts  available  under  any  form  of   credit
enhancement  (other  than subordination)  which is  specified in  the applicable
Prospectus Supplement.  See "Credit  Support"  below. The  manner in  which  any
available  credit support will  be allocated among Subclasses  of a Senior Class
will be set forth in the  applicable Prospectus Supplement. With respect to  any
Distribution  Date, the "Senior Class Carryover  Shortfall" means the excess, if
any, of (a) the amount the Senior Certificateholders were entitled to receive on
the prior  Distribution  Date  less the  amount  the  Senior  Certificateholders
received  on such prior Distribution Date, together with interest thereon at the
Pass-Through Rate of such Senior Class from such prior Distribution Date through
the current Distribution Date, over (b)  the portion of the amount specified  in
clause (a) constituting Late Payments, together with interest on such portion at
the  applicable Pass-Through Rate from such  prior Distribution Date through the
current Distribution Date, to the extent such Late Payments and interest thereon
are included  in  the Pool  Distribution  Amount  with respect  to  the  current
Distribution Date.
 
    With  respect to  a Series of  Percentage Certificates  (other than Shifting
Interest Certificates) including a Class of Subordinated Certificates, once  the
Subordinated  Amount is  reduced to zero,  any remaining  Senior Class Shortfall
with respect to a  Class of Senior  Certificates will cease  to be payable  from
amounts  otherwise distributable to the  Subordinated Certificateholders and the
amounts in  the related  Subordination Reserve  Fund, if  any, except  that  the
portion  of such Senior Class Shortfall which  is attributable to the accrual of
interest on the Senior  Class Carryover Shortfall  (the "Senior Class  Shortfall
Accruals")  shall continue to bear interest at the applicable Pass-Through Rate,
and the Senior Certificateholders shall continue to have a preferential right to
be paid such amounts from distributions otherwise available to the  Subordinated
Certificateholders   until  such  amount  (including  interest  thereon  at  the
applicable   Pass-Through    Rate)    is    paid   in    full.    See    "Credit
Support--Subordination" below.
 
    The  Subordinated  Certificateholders will  be  entitled to  receive  on any
Distribution Date an amount equal to the Subordinated Class Pro Rata Share less:
(a) any  amounts required  to be  distributed to  the Senior  Certificateholders
pursuant   to   the   subordination   of   the   rights   of   the  Subordinated
Certificateholders as described below; and (b) any amounts necessary to fund the
Subordination Reserve Fund as described below. See "Credit
Support--Subordination" below.
 
                                       27
<PAGE>
  SHIFTING INTEREST CERTIFICATES
 
    On each Distribution Date  for a series  of Shifting Interest  Certificates,
the  Servicer will distribute on behalf of the Trustee or cause the Paying Agent
to distribute, as the case may be, to  the holders of record on the Record  Date
of a Class of Senior Certificates, to the extent of the Pool Distribution Amount
with  respect to such  Distribution Date (as  determined by the  Servicer on the
related Determination Date in the same manner as described above with respect to
Percentage Certificates other than Shifting Interest Certificates) and prior  to
any  distribution being made on the related Subordinated Certificates, an amount
equal to the  Senior Class  Distribution Amount. The  Senior Class  Distribution
Amount  will  (except  as  otherwise  set  forth  in  the  applicable Prospectus
Supplement) be calculated  for any Distribution  Date as the  lesser of (x)  the
Pool Distribution Amount for such Distribution Date and (y) the sum of:
 
         (i)  one month's interest  at the applicable  Pass-Through Rate on such
    Class's outstanding principal balance (less, if specified in the  applicable
    Prospectus  Supplement,  (a) the  amount by  which the  aggregate Prepayment
    Interest Shortfall with respect to the preceding month exceeds the aggregate
    Servicing Fees, in each case allocated to such Class on the basis set  forth
    in the related Prospectus Supplement, (b) the aggregate Curtailment Interest
    Shortfall with respect to the preceding month allocated to such Class and/or
    (c)  one month's  interest at the  applicable Net Mortgage  Interest Rate on
    such Class's percentage, specified in the applicable Prospectus  Supplement,
    of  the Scheduled Principal Balance of each Special Hazard Mortgage Loan (as
    defined below) covered by clause (iv) below);
 
        (ii) if distribution of  the amount of  interest calculated pursuant  to
    clause (i) above on any prior Distribution Date was not made in full on such
    prior  Distribution Date, an amount equal  to (a) the difference between (x)
    the amount of interest which the  holders of such Class would have  received
    on  the prior Distribution Date if there had been sufficient funds available
    in  the  Certificate  Account  and  (y)  the  amount  of  interest  actually
    distributed  to such holders on such  prior Distribution Date, together with
    interest on such difference (to the  extent permitted by applicable law)  at
    the  applicable  Pass-Through  Rate  of  such  Class  (the  "Unpaid Interest
    Shortfall") less (b) the aggregate amount distributed on Distribution  Dates
    subsequent  to  such  prior Distribution  Date  with respect  to  the Unpaid
    Interest Shortfall;
 
        (iii) such Class's percentage, calculated as provided in the  applicable
    Prospectus  Supplement, of  (a) all scheduled  payments of  principal due on
    each outstanding Mortgage Loan,  on the Due Date  occurring in the month  in
    which  the Distribution Date  occurs, (b) all  partial principal prepayments
    applied by the Servicer in reduction of the unpaid principal of any Mortgage
    Loan on or after the Determination Date in the month preceding the month  in
    which  the Distribution Date occurs (or after  the Cut-Off Date, in the case
    of the  first  Distribution  Date)  and  prior  to  the  Determination  Date
    occurring in the month in which the Distribution Date occurs, and (c) except
    for  Special  Hazard  Mortgage  Loans  covered  by  clause  (iv)  below, the
    Scheduled Principal  Balance  of  each  Mortgage  Loan  which,  during  such
    preceding month, (i) was the subject of a principal prepayment in full, (ii)
    became a liquidated Mortgage Loan, or (iii) was repurchased by the Seller or
    purchased  by the person  or persons specified  in the applicable Prospectus
    Supplement pursuant to the Pooling and Servicing Agreement; and
 
        (iv) such Class's specified percentage  of the net Liquidation  Proceeds
    from  any Mortgage  Loan that became  a Special Hazard  Mortgage Loan during
    such preceding month (but  only if the Special  Hazard Termination Date  (as
    defined below) has occurred);
 
provided  that, if such Distribution Date falls  on or after the Cross-Over Date
(i.e., the date on which the amount of principal payments on the Mortgage  Loans
to  which the holders of the  related Subordinated Certificates are entitled has
been reduced to zero as a result of the allocation of losses to the Subordinated
Certificates), then the Senior Class Distribution Amount will instead equal  the
lesser of (x) the Pool Distribution Amount and (y) the sum of the items referred
to  above plus the amount by which such Class's outstanding principal balance as
of such  Distribution  Date exceeds  the  Pool Scheduled  Principal  Balance  as
 
                                       28
<PAGE>
of  such  Distribution Date.  The  Pool Scheduled  Principal  Balance as  of any
Distribution Date is the  aggregate of the Scheduled  Principal Balances of  all
Mortgage  Loans in a Trust Estate that were  outstanding on the first day of the
month prior to the month in which such Distribution Date falls.
 
    If so provided in the applicable Prospectus Supplement, one or more  Classes
of  Senior  Certificates will  also  be entitled  to  receive, as  its  or their
specified percentage(s) referred  to in clauses  (y)(iii)(b) and  (y)(iii)(c)(i)
above,  all partial principal prepayments and  all principal prepayments in full
on the Mortgage Loans in the related Trust Estate under the circumstances or for
the period of time specified therein, which will have the effect of accelerating
the amortization  of the  Senior Certificates  while increasing  the  respective
interest evidenced by the Subordinated Certificates in the related Trust Estate.
Increasing  the respective interest of the Subordinated Certificates relative to
that of the Senior Certificates is intended to preserve the availability of  the
subordination provided by the Subordinated Certificates.
 
    If  the Special Hazard Termination Date would occur on any Distribution Date
under the circumstances  referred to in  "Credit Support--Subordination"  below,
the  Senior Class Distribution  Amount for each Class  of Senior Certificates of
such Series calculated  as set  forth in the  two preceding  paragraphs will  be
modified to the extent described in such section.
 
    Amounts distributed to a Class of Senior Certificates on a Distribution Date
will  be deemed to be applied first to  the payment of current interest, if any,
due on such Class (i.e., the amount calculated pursuant to clause (y)(i) of  the
third  preceding  paragraph),  second  to the  payment  of  any  Unpaid Interest
Shortfall (i.e.,  the  amount calculated  pursuant  to clause  (y)(ii)  of  such
paragraph)  and third  to the payment  of principal,  if any, due  on such Class
(i.e., the aggregate of the amounts calculated pursuant to clauses (y)(iii)  and
(y)(iv) of such paragraph).
 
    As  indicated above, in the  event that the Pool  Distribution Amount on any
Distribution Date is  not sufficient to  make the full  distribution of  current
interest  to the holders of a Class  of Senior Certificates entitled to payments
of interest, the  difference between the  amount of current  interest which  the
holders of such Class would have received on such Distribution Date if there had
been  sufficient funds  available and  the amount  actually distributed  will be
added to the amount of interest which the holders of such Class are entitled  to
receive  on  the  next  Distribution Date.  Unless  otherwise  specified  in the
applicable Prospectus Supplement, the amount  of any such interest shortfall  so
carried  forward will bear interest (to  the extent permitted by applicable law)
at the Pass-Through Rate applicable to such Class.
 
    If the Pool Distribution Amount is insufficient on any Distribution Date  to
make  the full distribution of principal due  on a Class of Senior Certificates,
the percentage  of  principal  payments  to which  the  holders  of  the  Senior
Certificates  would be entitled on  the immediately succeeding Distribution Date
will be increased. This increase will have the effect of reducing, as a relative
matter, the respective interest of the holders of the Subordinated  Certificates
in  future payments  of principal  on the  related Mortgage  Loans. If  the Pool
Distribution Amount is not sufficient to make full distribution described  above
to  the holders of all  Classes of Senior Certificates  on any Distribution Date
(assuming that  more than  one Class  or Subclass  of Senior  Certificates of  a
Series has been issued), unless otherwise specified in the applicable Prospectus
Supplement,  the holders of each such Class  or Subclass will share in the funds
actually available in proportion to the respective amounts that each such  Class
or Subclass would have received had the Pool Distribution Amount been sufficient
to  make the full distribution of interest  and principal due to each such Class
or Subclass.
 
    Unless otherwise  provided in  the related  Prospectus Supplement,  on  each
Distribution  Date the holders of the  related Subordinated Certificates will be
entitled to receive (in the amounts specified therein if there is more than  one
Class  of Subordinated Certificates), out of funds available for distribution in
the related  Certificate  Account on  such  date, all  amounts  remaining  after
deduction  of  the amounts  required to  be  distributed to  the holders  of all
Classes of Senior Certificates of the same Series.
 
                                       29
<PAGE>
EXAMPLE OF DISTRIBUTION TO PERCENTAGE CERTIFICATEHOLDERS
 
    The following  chart  sets  forth  an example  of  the  application  of  the
foregoing  provisions  to the  first two  months of  the related  Trust Estate's
existence, assuming the Certificates are issued in the month of January, with  a
Distribution Date on the 25th of each month and a Determination Date on the 17th
of each month:
 
<TABLE>
<S>                     <C>
January 1(A)..........  Cut-Off Date.
January 2-January       The  Servicer receives any principal prepayments in full
  31(B)...............  (including prepayments due to liquidation) and  interest
                        thereon to date of prepayment.
January 31(C).........  Record Date.
February 1-February     The  Servicer receives  scheduled payments  of principal
  17(D)...............  and interest due on February 1.
February 17(E)........  Determination Date.
February 25(F)........  Distribution Date.
</TABLE>
 
- ------------------------
(A) The initial unpaid principal balance of the Mortgage Loans in a Trust Estate
    would be the aggregate unpaid principal balance of the Mortgage Loans at the
    close of business on January 1, after deducting principal payments due on or
    before such date. Those  principal payments due on  or before January 1  and
    the  related interest payments,  would not be  part of the  Trust Estate and
    would be remitted by the Servicer to the Seller when received.
 
(B) Principal prepayments in full received during this period would be  credited
    to  the Certificate  Account for  distribution to  Certificateholders on the
    February 25 Distribution Date.  When a Mortgage Loan  is prepaid in full  or
    liquidated or an insurance claim with respect to a Mortgage Loan is settled,
    interest  on the  amount prepaid,  liquidated or  received in  settlement is
    collected only from the last scheduled  Due Date to the date of  prepayment,
    liquidation  or settlement. In addition, when  a Mortgage Loan is prepaid in
    part and  such payment  is applied  as  of a  date other  than a  Due  Date,
    interest  is charged on such payment only to the date applied. To the extent
    funds are available from the aggregate Servicing Fees relating to  mortgagor
    payments  or  other  recoveries  distributed  to  Certificateholders  on the
    related Distribution Date, the Servicer would make an additional payment  to
    Certificateholders with respect to any Mortgage Loan that prepaid in full or
    became a liquidated Mortgage Loan in January equal to the amount of interest
    on  such Mortgage Loan at  the Net Mortgage Interest  Rate for such Mortgage
    Loan from the date of such prepayment in full or liquidation through January
    31.
 
(C) Distributions in the month of February will be made to Certificateholders of
    record at the close of business on this date.
 
(D) Scheduled monthly  payments on  the Mortgage Loans  due on  February 1,  and
    partial  principal prepayments applied  by the Servicer  in reduction of the
    unpaid principal balance of any Mortgage Loan prior to February 17, will  be
    deposited in the Certificate Account as received by the Servicer and will be
    distributed  to  Certificateholders on  the  February 25  Distribution Date.
    Principal prepayments  in  full,  liquidation  proceeds  and  proceeds  with
    respect  to the repurchase or purchase of any of the Mortgage Loans, in each
    case received during this period, and partial principal prepayments  applied
    on  or after February 17,  will be deposited in  the Certificate Account but
    will  not  be   distributed  to  Certificateholders   on  the  February   25
    Distribution Date. Instead, such amounts will be credited to the Certificate
    Account  for distribution to Certificateholders on the March 25 Distribution
    Date.
 
(E) As of the close of business on February 17, the Servicer will determine  the
    amounts of Periodic Advances and the amounts of principal and interest which
    will  be distributed to the Certificateholders, including scheduled payments
    due on or before February 1 which  have been received on or before  February
    17,  partial principal prepayments  applied by the  Servicer in reduction of
    the unpaid principal balance of any  Mortgage Loan prior to February 17  and
    principal  prepayments  in  full, liquidation  proceeds,  and  proceeds with
    respect to the repurchase or purchase of any of the Mortgage Loans, received
    during the  period commencing  January  2 and  ending  on January  31.  With
    respect  to  each Series  of  Percentage Certificates,  other  than Shifting
    Interest Certificates, the Servicer will calculate the Distributable  Amount
    and   the  Pro  Rata  Share  for   each  Class,  and  the  amount  otherwise
    distributable to the Subordinated Class,  together with amounts, if any,  in
    the  Subordination Reserve  Fund, will  be available,  to the  extent of the
    Subordinated  Amount,   to  increase   the  amount   distributable  to   the
 
                                         (FOOTNOTES CONTINUED ON FOLLOWING PAGE)
 
                                       30
<PAGE>
    Succeeding  monthly periods  follow the pattern  of (B)  through (F), except
that the period in (B) begins on the first of the month.
 
DISTRIBUTIONS TO MULTI-CLASS CERTIFICATEHOLDERS
 
    The following description of distributions to Multi-Class Certificateholders
is one  example of  how such  distributions may  be determined.  The  Prospectus
Supplement   for  a  Series  may  provide   for  a  different  manner  in  which
distributions to  Multi-Class Certificateholders  will  be determined  for  such
Series  so long as such Multi-Class Certificates  are rated upon issuance in one
of the two highest rating categories by at least one Rating Agency.
 
    Except as  otherwise  set forth  in  the applicable  Prospectus  Supplement,
distributions of interest and distributions in reduction of the Stated Amount of
Multi-Class  Certificates will  be made  from the  Pool Distribution  Amount (as
determined by the Servicer on the related Determination Date in the same  manner
as  described above with  respect to Series of  Percentage Certificates) on each
Distribution Date for such Series to the holders of each Class then entitled  to
receive such distributions until the aggregate amount of such distributions have
reduced  the  Stated  Amount  of  each  such  Class  of  Certificates  to  zero.
Distributions in reduction of Stated Amount will be allocated among the  Classes
of  such  Certificates  in the  manner  specified in  the  applicable Prospectus
Supplement. Unless otherwise specified in the applicable Prospectus  Supplement,
all  distributions in reduction of  the Stated Amount of  a Class of Multi-Class
Certificates will be made pro rata among the Certificates of such Class.
 
    Unless otherwise specified in the Prospectus Supplement relating to a Series
of Certificates, the aggregate amount that  will be distributed in reduction  of
Stated  Amount to holders of Multi-Class  Certificates of a Series then entitled
thereto on any Distribution Date for such Series will equal, to the extent funds
are available, the sum  of (i) the  Multi-Class Certificate Distribution  Amount
(as  defined herein)  and (ii)  if and  to the  extent specified  in the related
Prospectus Supplement, the applicable percentage of the Spread specified in such
Prospectus Supplement.
 
    Unless otherwise  specified in  the  applicable Prospectus  Supplement,  the
"Multi-Class  Certificate Distribution  Amount" with  respect to  a Distribution
Date for a Series of Multi-Class Certificates will equal the amount, if any,  by
which  the Stated Amount  of the Multi-Class Certificates  of such Series (after
taking into account the amount of interest  to be added to the Stated Amount  of
any Class of Compound Interest Certificates on such Distribution Date and before
giving  effect  to  any distributions  in  reduction  of Stated  Amount  on such
Distribution Date) exceeds the  Pool Value (as defined  herein) of the  Mortgage
Loans  included in the Trust Estate for such  Series as of the end of the period
(a "Due Period") specified in the related Prospectus Supplement. For purposes of
determining the Multi-Class  Certificate Distribution Amount  with respect to  a
Distribution  Date for a  Series of Certificates  having one or  more Classes of
Multi-Class Certificates, the Pool Value of  the Mortgage Loans included in  the
Trust  Estate for  such Certificates  will be reduced  to take  into account all
distributions thereon received by the Trustee during the applicable Due Period.
 
    Unless otherwise specified in the applicable Prospectus Supplement, "Spread"
with respect to  a Distribution Date  for a Series  of Multi-Class  Certificates
will   be   the   excess   of   (a)   the   sum   of   (i)   all   payments   of
 
- --------------------------------------------------------------------------------
(FOOTNOTES CONTINUED FROM PRECEDING PAGE)
    Senior Class or Classes up to the Senior Class Shortfall in respect of  such
    Classes.  With respect to each Series of Shifting Interest Certificates, the
    Servicer will calculate the Senior Class Distribution Amount for each Senior
    Class and will determine the percentage interests of each Senior Class to be
    used in connection with calculating  Senior Class Distribution Amounts  with
    respect  to the March 25 Distribution Date. If applicable, the Servicer will
    calculate the  amounts  payable in  respect  of  any other  form  of  credit
    enhancement.
 
(F)  Unless otherwise  so specified  in the  related Prospectus  Supplement, the
    Servicer or the Paying Agent  will make distributions to  Certificateholders
    on the 25th day of each month, or if such 25th day is not a business day, on
    the next business day.
 
                                       31
<PAGE>
principal  and interest received on the related Mortgage Loans (net of the Fixed
Retained Yield, if any,  and the applicable Servicing  Fee with respect to  such
Mortgage  Loans) in the Due Period applicable  to such Distribution Date and, in
the case of  the first Due  Period, any amount  deposited by the  Seller in  the
Certificate  Account on the Closing Date, (ii) income from reinvestment thereof,
if any,  and  (iii)  to  the  extent  specified  in  the  applicable  Prospectus
Supplement,  the amount  of cash  withdrawn from  any reserve  fund or available
under any other form of credit enhancement for such Series, over (b) the sum  of
(i)  all interest distributed on the  Multi-Class Certificates of such Series on
such Distribution Date, (ii) the Multi-Class Certificate Distribution Amount for
such Series with respect to such Distribution Date, (iii) if applicable to  such
Series,  any  Special Distributions  (as described  below)  in reduction  of the
Stated Amount of  the Multi-Class  Certificates of  such Series  made since  the
preceding  Distribution Date for such  Series (or since the  Closing Date in the
case of the  first Distribution  Date for  such Series),  including any  accrued
interest  distributed with  such Special Distributions,  (iv) all administrative
and other expenses relating  to the Trust Estate  payable during the Due  Period
preceding  such Distribution Date, other than such expenses which are payable by
the Servicer, and any amount required to be deposited into any reserve fund from
funds allocable  to the  Multi-Class Certificates  in the  Certificate  Account.
Reinvestment income on any reserve fund will not be included in Spread except to
the  extent that  reinvestment income is  taken into account  in calculating the
initial amount required to be deposited in such reserve fund, if any.
 
  VALUATION OF MORTGAGE LOANS
 
    If  specified  in  the  Prospectus  Supplement  relating  to  a  series   of
Multi-Class  Certificates, for purposes of  establishing the principal amount of
Mortgage Loans that will  be included in  a Trust Estate  for such Series,  each
Mortgage  Loan to be included  in such Trust Estate  will be assigned an initial
"Pool  Value."  Unless   otherwise  specified  in   the  applicable   Prospectus
Supplement,  the Pool  Value of  each Mortgage  Loan in  the Trust  Estate for a
Series is the Stated  Amount of Multi-Class Certificates  of such Series  which,
based  upon  certain  assumptions  and regardless  of  any  prepayments  on such
Mortgage Loans, can  be supported  by the  scheduled payments  of principal  and
interest  on  such Mortgage  Loans  (net of  the  Fixed Retained  Yield  on such
Mortgage Loans,  if  any,  and  the applicable  Servicing  Fee),  together  with
reinvestment  earnings thereon, if any, at the Assumed Reinvestment Rate for the
period specified in the related  Prospectus Supplement and amounts available  to
be  withdrawn (if  applicable) from  any reserve  fund for  such Series,  all as
specified in the applicable Prospectus Supplement. In calculating the Pool Value
of a Mortgage Loan  included in the Trust  Estate, future distributions on  such
Mortgage  Loan will be  determined based on scheduled  payments on such Mortgage
Loan. Any  similar Mortgage  Loans may  be aggregated  into one  or more  groups
(each,  a "Pool Value Group"), each of  which will be assigned an aggregate Pool
Value calculated  as  if  all  such  Mortgage Loans  in  the  Pool  Value  Group
constituted  a single  mortgage loan  having the  highest mortgage  rate and the
longest maturity of any such mortgage loan for such Pool Value Group. There  are
a  number of alternative means of determining  the Pool Value of a Mortgage Loan
or Pool Value Group,  including determinations based  on the discounted  present
value  of the remaining scheduled payments of principal and interest thereon and
determinations based on  the relationship  between the  Mortgage Interest  Rates
borne  thereby and  the Interest  Rates of  the Multi-Class  Certificates of the
related Series.  The Prospectus  Supplement for  each Series  will describe  the
method or methods (and related assumptions) used to determine the Pool Values of
the  Mortgage Loans or the  Pool Value Groups for such  Series. In any event, on
each Distribution Date, after  making the distributions  in reduction of  Stated
Amount  on  such Distribution  Date, the  aggregate  of the  Pool Values  of all
Mortgage Loans and all the Pool Value Groups included in the Trust Estate for  a
Series  of Certificates will be at least equal to the aggregate Stated Amount of
the Multi-Class Certificates of such Series.
 
    The "Assumed Reinvestment  Rate" for  a Series  of Multi-Class  Certificates
will  be the  highest rate  permitted by  the Rating  Agency or  Rating Agencies
rating such Series of Multi-Class Certificates or  a rate insured by means of  a
surety  bond, guaranteed investment contract or similar arrangement satisfactory
to such Rating Agency or Rating Agencies. If the Assumed Reinvestment Rate is so
insured, the related  Prospectus Supplement  will set  forth the  terms of  such
arrangement.
 
                                       32
<PAGE>
  SPECIAL DISTRIBUTIONS
 
    To the extent specified in the Prospectus Supplement relating to a Series of
Multi-Class  Certificates which have other  than monthly Distribution Dates, any
such  Classes  having  Stated  Amounts  may  receive  special  distributions  in
reduction of Stated Amount, together with accrued interest on the amount of such
reduction  ("Special Distributions") in any month, other than a month in which a
Distribution Date  occurs, if,  as  a result  of  principal prepayments  on  the
Mortgage  Loans  in the  related Trust  Estate  and/or reinvestment  yields then
available, the  Trustee  determines,  based  on  assumptions  specified  in  the
applicable  Pooling and Servicing Agreement, that the amount of cash anticipated
to be available on the next Distribution Date for such Series to be  distributed
to  the holders of such Multi-Class Certificates may be less than the sum of (i)
the interest scheduled to be distributed to such holders and (ii) the amount  to
be distributed in reduction of Stated Amount of such Multi-Class Certificates on
such  Distribution Date. Any such Special Distributions will be made in the same
priority and manner as distributions in reduction of Stated Amount would be made
on the next Distribution Date.
 
    To the extent specified  in the related Prospectus  Supplement, one or  more
Classes  of Certificates of a Series  of Multi-Class Certificates may be subject
to special distributions in reduction of the Stated Amount thereof at the option
of the  holders of  such  Certificates, or  to  mandatory distributions  by  the
Servicer.  Any such distributions with respect to  a Series will be described in
the applicable Prospectus Supplement and will be on such terms and conditions as
described therein and specified in the Pooling and Servicing Agreement for  such
Series.
 
  LAST SCHEDULED DISTRIBUTION DATE
 
    The  "Last  Scheduled  Distribution  Date"  for  each  Class  of Multi-Class
Certificates of a Series  having a Stated Amount,  to the extent Last  Scheduled
Distribution Dates are specified in the applicable Prospectus Supplement, is the
latest  date on which  (based upon the  assumptions set forth  in the applicable
Prospectus Supplement) the Stated Amount of such Class is expected to be reduced
to zero. Since the rate of distributions  in reduction of Stated Amount of  each
such Class of Multi-Class Certificates will depend upon, among other things, the
rate  of payment (including prepayments) of  the principal of the Mortgage Loans
in the Trust Estate for such Series,  the actual last Distribution Date for  any
such   Class  could  occur   significantly  earlier  than   its  Last  Scheduled
Distribution Date.  To the  extent of  any delays  in receipt  of any  payments,
insurance  proceeds or liquidation  proceeds with respect  to the Mortgage Loans
included in any  Trust Estate,  the last Distribution  Date for  any such  Class
could  occur  later  than its  Last  Scheduled  Distribution Date.  The  rate of
payments  on  the  Mortgage  Loans  in  the  Trust  Estate  for  any  Series  of
Certificates  will depend upon  their particular characteristics,  as well as on
the prevailing level  of interest  rates from time  to time  and other  economic
factors, and no assurance can be given as to the actual prepayment experience of
the Mortgage Loans. See "Prepayment and Yield Considerations" below.
 
                                 CREDIT SUPPORT
 
SUBORDINATION
 
  CERTIFICATES OTHER THAN SHIFTING INTEREST CERTIFICATES
 
    If  so  specified  in the  Prospectus  Supplement  relating to  a  Series of
Certificates, other than a Series of Shifting Interest Certificates, the  rights
of  the holders of a Class of Subordinated Certificates to receive distributions
will be  subordinated  to  the rights  of  the  holders of  a  Class  of  Senior
Certificates,  to  the  extent  of the  Subordinated  Amount  specified  in such
Prospectus Supplement.  The Subordinated  Amount will  be reduced  by an  amount
equal  to Aggregate  Losses and  will be  further reduced  in accordance  with a
schedule described in the applicable Prospectus Supplement. Aggregate Losses  as
defined  in the applicable Pooling and  Servicing Agreement for any given period
will equal the aggregate amount of delinquencies, losses and other  deficiencies
("Payment  Deficiencies") in  the amounts  due to  the Senior Certificateholders
paid or borne by the Subordinated Certificateholders (but excluding any payments
of Senior  Class Shortfall  Accruals or  interest thereon)  during such  period,
whether such aggregate amount results by way of
 
                                       33
<PAGE>
withdrawals  from the Subordination  Reserve Fund (including,  prior to the time
that the Subordinated Amount is reduced to zero, any such withdrawal of  amounts
attributable  to the Initial Deposit, if  any), reductions in amounts that would
otherwise have been distributable to the Subordinated Certificateholders on  any
Distribution  Date, or otherwise; less the  aggregate amount of previous Payment
Deficiencies recovered by the related Trust Estate during such period in respect
of the  Mortgage  Loans  giving  rise to  such  previous  Payment  Deficiencies,
including,  without limitation,  such recoveries  resulting from  the receipt of
delinquent principal or  interest payments, Liquidation  Proceeds and  insurance
proceeds  (net, in  each case,  of any applicable  Fixed Retained  Yield and any
unpaid Servicing Fee to  which the Servicer is  entitled, foreclosure costs  and
other servicing costs, expenses and advances relating to such Mortgage Loans).
 
    The   protection   afforded  to   the   Senior  Certificateholders   by  the
subordination feature described above will be effected both by the  preferential
right,  to the extent specified in the applicable Prospectus Supplement, of such
Senior Certificateholders  to  receive  current  distributions  on  the  related
Mortgage  Loans that would otherwise have been distributable to the Subordinated
Certificateholders and (unless otherwise specified in the applicable  Prospectus
Supplement) by the establishment and maintenance of a Subordination Reserve Fund
for  such  Series.  Unless  otherwise  specified  in  the  applicable Prospectus
Supplement, the  Subordination Reserve  Fund will  not be  a part  of the  Trust
Estate.  The Subordination Reserve Fund may  be funded initially with an initial
deposit by the  Seller (the "Initial  Deposit") in  an amount set  forth in  the
applicable   Prospectus  Supplement.  Following  the  initial  issuance  of  the
Certificates of a Series and until the balance of the Subordination Reserve Fund
(without taking into account the amount of the Initial Deposit) first equals  or
exceeds  the  Specified  Subordination Reserve  Fund  Balance set  forth  in the
applicable  Prospectus  Supplement,  and  unless  otherwise  specified  in   the
applicable  Prospectus Supplement, the  Servicer will withhold  all amounts that
would otherwise have been  distributable to the Subordinated  Certificateholders
and  deposit such amounts (less any  portions thereof required to be distributed
to Senior Certificateholders  as described below)  in the Subordination  Reserve
Fund. The time necessary for the Subordination Reserve Fund of a Series to reach
the  applicable  Specified Subordination  Reserve Fund  Balance for  such Series
after the initial issuance  of the Certificates, and  the period for which  such
balance  is maintained,  will be  affected by  the delinquency,  foreclosure and
prepayment experience of  the Mortgage  Loans in  the related  Trust Estate  and
cannot  be accurately  predicted. Unless  otherwise specified  in the applicable
Prospectus Supplement,  after  the  amount in  the  Subordination  Reserve  Fund
(without  taking into account  the amount of  the Initial Deposit)  for a Series
first equals  or exceeds  the applicable  Specified Subordination  Reserve  Fund
Balance, the Servicer will withhold from the Subordinated Certificateholders and
will  deposit in  the Subordination Reserve  Fund such portion  of the principal
payments on  the  Mortgage Loans  otherwise  distributable to  the  Subordinated
Certificateholders  as may  be necessary  to maintain  the Subordination Reserve
Fund (without taking  into account  the amount of  the Initial  Deposit) at  the
Specified Subordination Reserve Fund Balance. The Prospectus Supplement for each
Series  will set  forth the amount  of the Specified  Subordination Reserve Fund
Balance applicable  from time  to time  and the  extent, if  any, to  which  the
Specified Subordination Reserve Fund Balance may be reduced.
 
    In  no event  will the  Specified Subordination  Reserve Fund  Balance for a
Series ever be  required to  exceed the Subordinated  Amount. In  the event  the
Subordination Reserve Fund is depleted before the Subordinated Amount is reduced
to  zero, the  Senior Certificateholders  will continue  to have  a preferential
right, to  the extent  specified  in the  applicable Prospectus  Supplement,  to
receive  current  distributions  of  amounts  that  would  otherwise  have  been
distributable to the Subordinated Certificateholders  to the extent of the  then
Subordinated Amount.
 
    After   the   Subordinated   Amount   is  reduced   to   zero,   the  Senior
Certificateholders  of  a  Series  will,  unless  otherwise  specified  in   the
applicable  Prospectus  Supplement,  nonetheless have  a  preferential  right to
receive payment  of  Senior Class  Shortfall  Accruals and  interest  which  has
accrued thereon from amounts that would otherwise have been distributable to the
Subordinated  Certificateholders. The  Senior Certificateholders  will otherwise
bear their proportionate  share of any  losses realized on  the Trust Estate  in
excess of the Subordinated Amount.
 
                                       34
<PAGE>
    Amounts  held from  time to  time in  the Subordination  Reserve Fund  for a
Series will be  held for the  benefit of the  Senior Certificateholders of  such
Series until withdrawn from the Subordination Reserve Fund as described below.
 
    If  on any  Distribution Date  while the  Subordinated Amount  exceeds zero,
there is a Senior Class Shortfall,  the Senior Class Certificateholders will  be
entitled  to  receive from  current payments  on the  Mortgage Loans  that would
otherwise have been distributable to Subordinated Certificateholders the  amount
of  such Senior Class  Shortfall. If such current  payments are insufficient, an
amount equal  to  the  lesser of:  (i)  the  entire amount  on  deposit  in  the
Subordination  Reserve  Fund  available for  such  purpose; or  (ii)  the amount
necessary to  cover  the Senior  Class  Shortfall  will be  withdrawn  from  the
Subordination  Reserve Fund. Amounts representing investment earnings on amounts
held in the Subordination Reserve Fund will not be available to make payments to
the Senior Certificateholders.  If current  payments on the  Mortgage Loans  and
amounts  available in the Subordination Reserve Fund are insufficient to pay the
entire Senior Class Shortfall, then amounts held in the Certificate Account  for
future   distributions  will   be  distributed   as  necessary   to  the  Senior
Certificateholders.
 
    Amounts withdrawn  from the  Subordination  Reserve Fund  for a  Series  and
deposited  in  the Certificate  Account for  such Series  will be  charged first
against amounts in the Subordination Reserve Fund other than the Initial Deposit
for such Series, and thereafter against such Initial Deposit.
 
    Any amounts in the Subordination Reserve Fund for a Series on a Distribution
Date in excess of the Specified Subordination Reserve Fund Balance on such  date
prior  to the time the  Subordinated Amount for such  Series is reduced to zero,
and any amounts remaining in the Subordination Reserve Fund for such Series upon
termination of  the  trust  created  by the  applicable  Pooling  and  Servicing
Agreement, will be paid, unless otherwise specified in the applicable Prospectus
Supplement,  to the Subordinated Certificateholders of such Series in accordance
with their pro rata ownership thereof, or, in the case of a Series with  respect
to  which an election has  been made to treat the  Trust Estate (or a segregated
pool of assets therein) as a REMIC, first to the Residual Certificateholders (to
the extent of  any portion  of the Initial  Deposit, if  any, and  undistributed
reinvestment  earnings  attributable thereto),  and  second to  the Subordinated
Certificateholders of such  Series, in each  case in accordance  with their  pro
rata   ownership  thereof.  Amounts   permitted  to  be   distributed  from  the
Subordination Reserve Fund for a Series will no longer be subject to any  claims
or rights of the Senior Certificateholders of such Series.
 
    Funds  in the Subordination  Reserve Fund for  a Series will  be invested as
provided in the applicable Pooling and  Servicing Agreement in certain types  of
eligible  investments ("Eligible Investments"). If an  election has been made to
treat the Trust Estate (or a segregated  pool of assets therein) as a REMIC,  no
more  than 30% of  the income or gain  of the Subordination  Reserve Fund in any
taxable year may be  derived from the sale  or other disposition of  investments
held  for less than three months in the Subordination Reserve Fund. The earnings
on  such  investments   will  be   withdrawn  and  paid   to  the   Subordinated
Certificateholders   of  such  Series   or  to  the   holders  of  the  Residual
Certificates, in the event  that an election  has been made  to treat the  Trust
Estate (or a segregated pool of assets therein) with respect to such Series as a
REMIC,  in accordance with their  respective interests. Investment income earned
on amounts held  in the  Subordination Reserve Fund  will not  be available  for
distribution to the Senior Certificateholders or otherwise subject to any claims
or rights of the Senior Certificateholders.
 
    Eligible  Investments for monies deposited in the Subordination Reserve Fund
will be specified in the applicable Pooling and Servicing Agreement and,  unless
otherwise provided in the applicable Prospectus Supplement, will mature no later
than the next Distribution Date.
 
    Holders  of Subordinated  Certificates of a  Series will not  be required to
refund any amounts which have been  properly distributed to them, regardless  of
whether  there are sufficient  funds to distribute  to Senior Certificateholders
the amounts to which they are later entitled.
 
                                       35
<PAGE>
    If  specified  in  the  Prospectus  Supplement  relating  to  a  Series   of
Certificates,  the Subordination Reserve Fund may  be funded in any other manner
acceptable to the  Rating Agency  and consistent with  an election,  if any,  to
treat  the Trust Estate (or a segregated pool of assets therein) for such Series
as a REMIC, as will be more fully described in such Prospectus Supplement.
 
  SHIFTING INTEREST CERTIFICATES
 
    If specified  in the  applicable Prospectus  Supplement, the  rights of  the
holders  of  the  Subordinated Certificates  of  a Series  of  Shifting Interest
Certificates to receive distributions with respect to the Mortgage Loans in  the
related  Trust Estate will be subordinated to  such rights of the holders of the
Senior Certificates of the same Series to the extent described below, except  as
otherwise  set  forth  in  such  Prospectus  Supplement.  This  subordination is
intended to  enhance the  likelihood of  regular receipt  by holders  of  Senior
Certificates  of the full amount of  scheduled monthly payments of principal and
interest due them and to provide limited protection to the holders of the Senior
Certificates against losses due to mortgagor defaults.
 
    The protection afforded to the holders of Senior Certificates of a Series of
Shifting Interest Certificates by the subordination feature described above will
be effected by the preferential right of  such holders to receive, prior to  any
distribution  being made in respect of  the related Subordinated Certificates on
each Distribution Date, current distributions  on the related Mortgage Loans  of
principal  and interest  due them  on each  Distribution Date  out of  the funds
available for distribution on such date in the related Certificate Account  and,
to  the extent described below,  by the right of  such holders to receive future
distributions on the Mortgage  Loans that would otherwise  have been payable  to
the holders of Subordinated Certificates.
 
    Losses  realized on liquidated Mortgage Loans (other than certain liquidated
Mortgage Loans that are Special Hazard  Mortgage Loans as described below)  will
be  allocated to the holders of Subordinated Certificates through a reduction of
the amount of principal payments on the Mortgage Loans to which such holders are
entitled. Prior to the Cross-Over Date,  holders of Senior Certificates of  each
Class  entitled to  a percentage of  principal payments on  the related Mortgage
Loans will be  entitled to  receive, as part  of their  respective Senior  Class
Distribution  Amounts  payable  on each  Distribution  Date in  respect  of each
Mortgage Loan that  became a  liquidated Mortgage  Loan in  the preceding  month
(subject  to the additional limitation  described below applicable to liquidated
Mortgage Loans that are Special Hazard Mortgage Loans), their respective  shares
of  the  Scheduled  Principal Balance  of  each such  liquidated  Mortgage Loan,
together with interest  accrued at  the applicable Net  Mortgage Interest  Rate,
irrespective of whether net Liquidation Proceeds realized thereon are sufficient
to  cover such amount. For  a description of the  full Senior Class Distribution
Amount  payable  to  holders  of   Senior  Certificates  of  each  Series,   see
"Description of the Certificates--Distributions to Percentage
Certificateholders--Shifting Interest Certificates."
 
    On each Distribution Date occurring on or after the Cross-Over Date, holders
of  Senior  Certificates of  each Class  entitled to  a percentage  of principal
payments will  generally  receive, as  part  of their  respective  Senior  Class
Distribution  Amounts,  only  their  respective shares  of  the  net Liquidation
Proceeds actually  realized in  respect of  the applicable  liquidated  Mortgage
Loans  after  reimbursement  to  the  Servicer  of  any  previously unreimbursed
Periodic Advances  made  in  respect  of such  liquidated  Mortgage  Loans.  See
"Description of the Certificates--Distributions to Percentage
Certificateholders--Shifting Interest Certificates."
 
    In  the event that a  Mortgage Loan becomes a  liquidated Mortgage Loan as a
result of a hazard not insured against under a standard hazard insurance  policy
of  the type described herein (a "Special Hazard Mortgage Loan"), the holders of
Senior Certificates of each Class entitled to a percentage of principal payments
on the related Mortgage  Loans will be  entitled to receive  in respect of  each
Mortgage  Loan  which became  a Special  Hazard Mortgage  Loan in  the preceding
month, as part of their respective Senior Class Distribution Amounts payable  on
each  Distribution  Date prior  to the  Special  Hazard Termination  Date, their
respective shares  of the  Scheduled Principal  Balance of  such Mortgage  Loan,
together  with interest  accrued at the  applicable Net  Mortgage Interest Rate,
rather than  their  respective  shares  of  net  Liquidation  Proceeds  actually
realized.  The Special Hazard Termination Date for a Series of Certificates will
be the earlier to occur
 
                                       36
<PAGE>
of (i) the  date on which  cumulative net  losses in respect  of Special  Hazard
Mortgage Loans exceed the Special Hazard Loss Amount specified in the applicable
Prospectus  Supplement  or (ii)  the Cross-Over  Date. Since  the amount  of the
Special Hazard Loss Amount for a Series  of Certificates is expected to be  less
than the amount of principal payments on the Mortgage Loans to which the holders
of  the Subordinated  Certificates of such  Series are  initially entitled (such
amount being subject to reduction, as described above, as a result of allocation
of losses on other liquidated Mortgage Loans as well as Special Hazard  Mortgage
Loans),  the holders of  Subordinated Certificates of such  Series will bear the
risk of losses in the case of  Special Hazard Mortgage Loans to a lesser  extent
than  they will bear losses on other liquidated Mortgage Loans. Once the Special
Hazard Termination Date  has occurred,  holders of Senior  Certificates of  each
Class  entitled to payments of principal will be entitled to receive, as part of
their respective Senior Class Distribution Amounts, only their respective shares
of net Liquidation Proceeds realized on Special Hazard Mortgage Loans (less  the
total  amount of delinquent installments in  respect of each such Special Hazard
Mortgage Loan that were previously the  subject of distributions to the  holders
of  Senior  Certificates  paid out  of  amounts otherwise  distributable  to the
holders of  the  Subordinated  Certificates of  such  Series).  The  outstanding
principal  balance of each such Class will,  however, be reduced by such Class's
specified percentage of  the Scheduled  Principal Balance of  each such  Special
Hazard  Mortgage Loan.  See "Description  of the  Certificates--Distributions to
Percentage Certificateholders--Shifting Interest Certificates."
 
    If the cumulative net losses  on all Mortgage Loans  in a Trust Estate  that
have  become Special Hazard Mortgage  Loans in the months  prior to the month in
which a Distribution Date occurs would exceed the Special Hazard Loss Amount for
a Series of Certificates, that portion  of the Senior Class Distribution  Amount
as  of such  Distribution Date  for each  Class of  Senior Certificates  of such
Series entitled to a percentage of  principal payments on the Mortgage Loans  in
the  related Trust  Estate attributable to  Mortgage Loans  which became Special
Hazard Mortgage Loans in the month preceding the month of such Distribution Date
will be calculated not on the basis of the Scheduled Principal Balances of  such
Special  Hazard Mortgage Loans but rather will be computed as an amount equal to
the sum of (i) the excess of the Special Hazard Loss Amount over the  cumulative
net  losses on all Mortgage  Loans that became Special  Hazard Mortgage Loans in
the months prior to the month of  such Distribution Date and (ii) the excess  of
(a)  the product of the percentage of  principal payments to which such Class is
entitled multiplied by the  aggregate net Liquidation  Proceeds of the  Mortgage
Loans  which became  Special Hazard  Mortgage Loans  in the  month preceding the
month of  such  Distribution  Date  over (b)  the  total  amount  of  delinquent
installments  in  respect  of  such  Special  Hazard  Mortgage  Loans  that were
previously the  subject of  distributions  to such  Class  paid out  of  amounts
otherwise distributable to the holders of the related Subordinated Certificates.
 
    Although  the subordination feature  described above is  intended to enhance
the likelihood of  timely payment of  principal and interest  to the holders  of
Senior  Certificates,  shortfalls  could result  in  certain  circumstances. For
example, a shortfall in  the payment of principal  otherwise due the holders  of
Senior  Certificates could occur if  losses realized on the  Mortgage Loans in a
Trust Estate  were exceptionally  high  and were  concentrated in  a  particular
month.   See  "Description  of  the  Certificates--Distributions  to  Percentage
Certificateholders--Shifting Interest  Certificates" for  a description  of  the
consequences of any shortfall of principal or interest.
 
    The  holders of Subordinated Certificates will not be required to refund any
amounts previously properly distributed to them, regardless of whether there are
sufficient funds on a subsequent Distribution  Date to make a full  distribution
to holders of each Class of Senior Certificates of the same Series.
 
OTHER CREDIT ENHANCEMENT
 
    In  addition to subordination as discussed  above, credit enhancement may be
provided with respect to  any Series of Certificates  in any other manner  which
may  be described  in the applicable  Prospectus Supplement,  including, but not
limited to,  credit enhancement  through an  alternative form  of  subordination
and/or one or more of the methods described below.
 
                                       37
<PAGE>
  LIMITED GUARANTEE
 
    If  so specified in  the Prospectus Supplement  with respect to  a Series of
Certificates, credit  enhancement may  be  provided in  the  form of  a  limited
guarantee issued by a guarantor named therein.
 
  LETTER OF CREDIT
 
    Alternative  credit support with respect to  a Series of Certificates may be
provided by  the  issuance of  a  letter of  credit  by the  bank  or  financial
institution  specified in  the applicable  Prospectus Supplement.  The coverage,
amount and frequency of any reduction in coverage provided by a letter of credit
issued with  respect to  a  Series of  Certificates will  be  set forth  in  the
Prospectus Supplement relating to such Series.
 
  POOL INSURANCE POLICIES
 
    If  so  specified  in the  Prospectus  Supplement  relating to  a  Series of
Certificates, the Seller will  obtain a pool insurance  policy for the  Mortgage
Loans in the related Trust Estate. The pool insurance policy will cover any loss
(subject  to the  limitations described in  a related  Prospectus Supplement) by
reason of default to the  extent a related Mortgage Loan  is not covered by  any
primary  mortgage insurance policy.  The amount and principal  terms of any such
coverage will be set forth in the Prospectus Supplement.
 
  SPECIAL HAZARD INSURANCE POLICIES
 
    If so specified in the applicable Prospectus Supplement, for each Series  of
Certificates  as to which a  pool insurance policy is  provided, the Seller will
also obtain a special  hazard insurance policy for  the related Trust Estate  in
the amount set forth in such Prospectus Supplement. The special hazard insurance
policy  will, subject to the limitations  described in the applicable Prospectus
Supplement, protect against  loss by  reason of damage  to Mortgaged  Properties
caused  by certain hazards not insured against under the standard form of hazard
insurance policy for the respective states in which the Mortgaged Properties are
located. The amount and principal terms of  any such coverage will be set  forth
in the Prospectus Supplement.
 
  MORTGAGOR BANKRUPTCY BOND
 
    If  so specified in  the applicable Prospectus  Supplement, losses resulting
from a  bankruptcy proceeding  relating to  a mortgagor  affecting the  Mortgage
Loans in a Trust Estate with respect to a Series of Certificates will be covered
under  a mortgagor bankruptcy bond (or any other instrument that will not result
in a downgrading of  the rating of  the Certificates of a  Series by the  Rating
Agency or Rating Agencies that rated such Series). Any mortgagor bankruptcy bond
or  such other  instrument will  provide for coverage  in an  amount meeting the
criteria of the Rating Agency or Rating Agencies rating the Certificates of  the
related  Series,  which  amount will  be  set  forth in  the  related Prospectus
Supplement. The amount  and principal  terms of any  such coverage  will be  set
forth in the Prospectus Supplement.
 
                      PREPAYMENT AND YIELD CONSIDERATIONS
 
PASS-THROUGH RATES AND INTEREST RATES
 
    Any  Class of Certificates of a Series may have a fixed Pass-Through Rate or
Interest Rate, or  a Pass-Through Rate  or Interest Rate  which varies based  on
changes  in an index or based on changes with respect to the underlying Mortgage
Loans (such as, for  example, varying on  the basis of  changes in the  weighted
average Net Mortgage Interest Rate of the underlying Mortgage Loans).
 
    The  Prospectus Supplement  for each Series  will specify the  range and the
weighted average of the Mortgage Interest Rates and, if applicable, Net Mortgage
Interest Rates for the Mortgage Loans  underlying such Series as of the  Cut-Off
Date.  If the Trust  Estate includes adjustable-rate  Mortgage Loans or includes
Mortgage Loans with different Net Mortgage Interest Rates, the weighted  average
Net  Mortgage Interest Rate may  vary from time to time  as set forth below. See
"The Trust Estates." The  Prospectus Supplement for a  Series will also  specify
the  initial weighted average Pass-Through Rate  or Interest Rate for each Class
of Certificates of such Series and  will specify whether each such  Pass-Through
Rate or Interest Rate is fixed or is variable.
 
                                       38
<PAGE>
    The  Net Mortgage Interest  Rate for any adjustable  rate Mortgage Loan will
change with  any  changes in  the  index  specified in  the  related  Prospectus
Supplement  on which such Mortgage Interest  Rate adjustments are based, subject
to any applicable periodic or aggregate  caps or floors on the related  Mortgage
Interest  Rate. The weighted average Net  Mortgage Interest Rate with respect to
any Series  may vary  due  to changes  in the  Net  Mortgage Interest  Rates  of
adjustable  rate Mortgage  Loans, to  the timing  of the  Mortgage Interest Rate
readjustments of  such Mortgage  Loans  and to  different  rates of  payment  of
principal  of fixed or adjustable rate Mortgage Loans bearing different Mortgage
Interest Rates. See "Prepayment and Yield Considerations."
 
SCHEDULED DELAYS IN DISTRIBUTIONS
 
    At the date of initial issuance  of the Certificates of each Series  offered
hereby,  the initial purchasers  of a Class of  Certificates (other than certain
Classes of Residual Certificates)  will be required to  pay accrued interest  at
the  applicable  Pass-Through Rate  or  Interest Rate  for  such Class  from the
Cut-Off Date for such Series to, but  not including, the date of issuance.  With
respect  to Standard Certificates or  Stripped Certificates, the effective yield
to Certificateholders  will  be  below  the  yield  otherwise  produced  by  the
applicable  Pass-Through Rate because the distribution of principal and interest
which is due on each Due  Date will not be made until  the 25th day (or if  such
25th day is not a business day, the business day immediately following such 25th
day)  of  the  month  in  which  such  Due  Date  occurs  (or  until  such other
Distribution Date specified  in the  applicable Prospectus  Supplement). To  the
extent  set forth in the related Prospectus Supplement, Multi-Class Certificates
may provide for distributions of interest accrued during periods ending prior to
the related Distribution Date. In any  such event, the nature of such  scheduled
delays  in  distribution  and  the  impact  on  the  yield  of  such Multi-Class
Certificates will be set forth in the related Prospectus Supplement.
 
EFFECT OF PRINCIPAL PREPAYMENTS
 
    When a Mortgage Loan is prepaid in full, the mortgagor pays interest on  the
amount  prepaid only to  the date of prepayment  and not thereafter. Liquidation
Proceeds (as defined  herein) and  amounts received in  settlement of  insurance
claims  are  also likely  to include  interest only  to the  time of  payment or
settlement. When a  Mortgage Loan  is prepaid in  part, and  such prepayment  is
applied  as of a date other than the  Due Date occurring in the month of receipt
or the Due Date occurring in the month following the month of receipt,  interest
is paid on the amount prepaid only to the date of prepayment and not thereafter.
The  effect of the foregoing is to reduce the aggregate amount of interest which
would otherwise be passed  through to Certificateholders  if such Mortgage  Loan
were  outstanding or such partial prepayment  were applied on the succeeding Due
Date. To partially mitigate this reduction  in yield, the Pooling and  Servicing
Agreement  relating to a Series will  provide, unless otherwise specified in the
applicable Prospectus Supplement, that with respect to any principal  prepayment
in  full or liquidation of any Mortgage Loan underlying the Certificates of such
Series, the Servicer will  pay into the Certificate  Account for such Series  to
the  extent funds  are available for  such purpose from  the aggregate Servicing
Fees (or  portion thereof  as specified  in the  related Prospectus  Supplement)
which  the Servicer  is entitled  to receive  relating to  mortgagor payments or
other recoveries distributed to  Certificateholders on the related  Distribution
Date, the amount, if any, of interest at the Net Mortgage Interest Rate for such
Mortgage  Loan  for the  period  from the  date of  such  prepayment in  full or
liquidation to and including the  end of the month  in which such prepayment  in
full  or  liquidation  occurs.  Unless  otherwise  specified  in  the applicable
Prospectus Supplement, no comparable yield support will be provided with respect
to partial prepayments, and any  interest shortfall arising from application  by
the  Servicer of  partial prepayments  other than  on a  Due Date  will be borne
solely by the Certificateholders  of the related Series.  See "Servicing of  the
Mortgage  Loans--Adjustment  to Servicing  Fee  in Connection  with  Prepaid and
Liquidated Mortgage Loans."
 
    A lower  rate of  principal prepayments  than anticipated  would  negatively
affect  the total return to  investors in any Certificates  of a Series that are
offered at a discount to their principal  amount and a higher rate of  principal
prepayments  than  anticipated  would  negatively  affect  the  total  return to
investors in the
 
                                       39
<PAGE>
Certificates of  a Series  that are  offered  at a  premium to  their  principal
amount.  The yield  on Stripped  Certificates may  be particularly  sensitive to
prepayment rates, and further information with respect to yield on such Stripped
Certificates will be included in the applicable Prospectus Supplement.
 
WEIGHTED AVERAGE LIFE OF CERTIFICATES
 
    The Mortgage Loans may  be prepaid in  full or in part  at any time.  Unless
otherwise  specified in the  applicable Prospectus Supplement,  no Mortgage Loan
will provide  for  a  prepayment  penalty. Unless  otherwise  specified  in  the
applicable  Prospectus Supplement,  all fixed  rate Mortgage  Loans will contain
due-on-sale clauses permitting the mortgagee to accelerate the maturities of the
Mortgage Loans  upon conveyance  of the  related Mortgaged  Properties, and  all
adjustable-rate  Mortgage Loans will permit creditworthy borrowers to assume the
then-outstanding indebtedness on the Mortgage Loans.
 
    Prepayments on Mortgage Loans are commonly measured relative to a prepayment
standard or  model.  The  Prospectus  Supplement for  each  Series  of  Stripped
Certificates  may, and the Prospectus Supplement  for each Series of Multi-Class
Certificates will, describe one or more such prepayment standards or models  and
contain  tables setting forth the projected yields  to maturity on each Class or
Subclass of Certificates of a Series  of Stripped Certificates or, with  respect
to a Series of Multi-Class Certificates, the weighted average life of each Class
and  the percentage of the  original aggregate Stated Amount  of each Class that
would be outstanding on  specified Distribution Dates for  such Series based  on
the assumptions stated in such Prospectus Supplement, including assumptions that
prepayments  on the  Mortgage Loans are  made at rates  corresponding to various
percentages of  the  prepayment  standard  or model  specified  in  the  related
Prospectus Supplement.
 
    There  is no  assurance that prepayment  of the Mortgage  Loans underlying a
Series of Certificates will conform to  any level of the prepayment standard  or
model  specified  in the  related Prospectus  Supplement.  A number  of factors,
including  homeowner  mobility,  economic  conditions,  changes  in  mortgagors'
housing  needs, job transfers, unemployment or, in the case of borrowers relying
on commission income  and self-employed borrowers,  significant fluctuations  in
income  or adverse economic conditions, mortgagors' net equity in the properties
securing the  mortgages,  servicing  decisions,  enforceability  of  due-on-sale
clauses,  mortgage  market interest  rates,  mortgage recording  taxes,  and the
availability of mortgage  funds, may affect  prepayment experience. In  general,
however,  if  prevailing interest  rates fall  significantly below  the Mortgage
Interest Rates on the  Mortgage Loans underlying a  Series of Certificates,  the
prepayment  rates  of  such Mortgage  Loans  are  likely to  be  higher  than if
prevailing rates remain at or above the  rates borne by such Mortgage Loans.  It
should  be noted  that Certificates of  a Series  may evidence an  interest in a
Trust Estate with different Mortgage Interest Rates. Accordingly, the prepayment
experience of such Certificates will to some extent be a function of the mix  of
interest  rates of the Mortgage Loans. In addition, the terms of the Pooling and
Servicing Agreement will require the Servicer to enforce any due-on-sale  clause
to  the extent it has knowledge of  the conveyance or the proposed conveyance of
the underlying  Mortgaged  Property;  provided, however,  that  any  enforcement
action  that the Servicer in  good faith determines may  be restricted by law or
that would impair or threaten to impair any recovery under any related insurance
policy will not be required and provided, further, that the Servicer may  permit
the  assumption  of defaulted  Mortgage Loans.  See  "Servicing of  the Mortgage
Loans--Enforcement of Due-on-Sale Clauses;  Realization Upon Defaulted  Mortgage
Loans"  and "Certain Legal Aspects of the Mortgage Loans--'Due-On-Sale' Clauses"
for a description of certain provisions of each Pooling and Servicing  Agreement
and  certain legal developments that may affect the prepayment experience on the
Mortgage Loans.
 
    At the request of the mortgagor, the Servicer may allow the refinancing of a
Mortgage  Loan  in  any  Trust  Estate  by  accepting  prepayments  thereon  and
permitting  a new  loan secured by  a Mortgage  on the same  property. Upon such
refinancing, the new loan will not be included in the Trust Estate. A  mortgagor
may be legally entitled to require the Servicer to allow such a refinancing. Any
such  refinancing  will have  the same  effect as  a prepayment  in full  of the
related Mortgage Loan.  In this regard  PHMC may, from  time to time,  implement
programs  designed  to encourage  refinancing  through PHMC,  including  but not
limited to general
 
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<PAGE>
or targeted solicitations, or the offering of pre-approved applications, reduced
origination fees or closing costs,  or other financial incentives. The  Servicer
may  also encourage refinancing of  defaulted Mortgage Loans, including Mortgage
Loans that  would  permit  creditworthy  borrowers  to  assume  the  outstanding
indebtedness.
 
    The  Seller will  be obligated,  under certain  circumstances, to repurchase
certain of  the Mortgage  Loans. In  addition, if  specified in  the  applicable
Prospectus  Supplement, the Pooling and Servicing Agreement will permit, but not
require, the Seller, and the terms of certain insurance policies relating to the
Mortgage Loans may  permit the  applicable insurer, to  purchase any  delinquent
Mortgage Loan. The proceeds of any such purchase or repurchase will be deposited
in the related Certificate Account and such purchase or repurchase will have the
same effect as a prepayment in full of the related Mortgage Loan. See "The Trust
Estates--Mortgage  Loans--Assignment  of  the  Mortgage  Loans  to  the Trustee"
and"--Optional Repurchases."  In addition,  if so  specified in  the  applicable
Prospectus  Supplement, the Servicer  will have the option  to purchase all, but
not less than all, of the Mortgage  Loans in any Trust Estate under the  limited
conditions   specified  in  such  Prospectus   Supplement.  For  any  Series  of
Certificates for which an election has been made to treat the Trust Estate (or a
segregated pool of assets therein) as  a REMIC, any such purchase or  repurchase
may  be effected only pursuant to a  "qualified liquidation," as defined in Code
Section 860F(a)(4)(A). See  "The Pooling  and Servicing  Agreement--Termination;
Purchase of Mortgage Loans."
 
                                   THE SELLER
 
    The  Prudential  Home Mortgage  Securities Company,  Inc. (the  "Seller"), a
direct, wholly-owned subsidiary  of The Prudential  Home Mortgage Company,  Inc.
("PHMC")  and  an  indirect,  wholly-owned  subsidiary  of  Residential Services
Corporation of America and The Prudential Insurance Company of America, a mutual
insurance  company  organized  under  the  laws  of  the  State  of  New  Jersey
("Prudential  Insurance"), is the  successor in interest  to The Prudential Home
Mortgage Securities  Company,  a  limited  purpose  general  partnership  formed
pursuant  to the Partnership Law  of the State of New  York on December 30, 1987
("PHMSCo."). The Seller was incorporated in the State of Delaware on August  21,
1985  under the name Dryden Guaranty Corporation, but did not actively engage in
business prior  to December  28, 1988.  On  July 18,  1988, the  Certificate  of
Incorporation  of the Seller was amended to, among other things, change the name
of Dryden  Guaranty  Corporation  to The  Prudential  Home  Mortgage  Securities
Company,  Inc. and  to limit the  purposes for  which the Seller  exists and, on
December 28, 1988, the Seller acquired all of the assets and assumed all of  the
liabilities of PHMSCo., including but not limited to all of PHMSCo.'s rights and
obligations  under the  Pooling and Servicing  Agreements relating  to series of
mortgage pass-through certificates previously sold by it.
 
    The limited purposes of the Seller are, in general, to acquire, own and sell
mortgage loans;  to issue,  acquire, own,  hold and  sell mortgage  pass-through
securities  which represent  ownership interests in  mortgage loans, collections
thereon and related properties; and to  engage in any acts which are  incidental
to, or necessary, suitable or convenient to accomplish, the foregoing.
 
    The  Seller  maintains  its principal  office  at 7470  New  Technology Way,
Frederick, Maryland 21701. Its telephone number is (301) 846-8199.
 
    At the time of  the formation of  any Trust Estate, the  Seller will be  the
sole  owner of all the related Mortgage Loans. The Seller will have acquired the
Mortgage Loans included in any Trust Estate from PHMC or another affiliate.  The
Seller's  only obligation with respect to the Certificates of any Series will be
to repurchase or substitute for Mortgage Loans in a Trust Estate in the event of
defective documentation  or  upon the  failure  of certain  representations  and
warranties  made by the Seller. See  "The Trust Estates-- Assignment of Mortgage
Loans to the Trustee."
 
                                       41
<PAGE>
                                      PHMC
 
GENERAL
 
    PHMC is the successor in interest to The Prudential Home Mortgage Company, a
joint venture  which was  formed under  the laws  of the  State of  New York  on
November 7, 1984 ("PHMCo."). Immediately prior to November 1987, the partners of
PHMCo.,  each  of which  owned a  50% interest  in the  joint venture,  were The
Prudential Mortgage  Capital Company,  Inc.,  a New  Jersey corporation  and  an
indirect,  wholly  owned  subsidiary  of Prudential  Insurance  ("PMCC")  and TR
Venture Corporation ("TRVC"), a Delaware corporation indirectly, wholly owned by
Salomon Inc and affiliated with Salomon Brothers Inc. During November 1987, PMCC
transferred a 0.1% interest in PHMCo. to its affiliate, PIC Realty  Corporation,
and,  immediately thereafter, the interest  of TRVC in PHMCo.  was retired. As a
consequence thereof,  PHMCo.  became  indirectly,  wholly  owned  by  Prudential
Insurance, which, in turn, also indirectly, wholly owns the Seller.
 
    PHMC was incorporated in the State of New Jersey on September 18, 1978 under
the  name Newark Rehabilitation,  Inc., but did not  actively engage in business
prior to October 31, 1988. On March 3, 1988, Newark Rehabilitation, Inc. changed
its name to  The Prudential  Home Mortgage Company,  Inc., and,  on October  31,
1988,  PHMC acquired  all of the  assets and  assumed all of  the liabilities of
PHMCo. As used herein and in each Prospectus Supplement, references to PHMC that
relate to activities  occurring prior  to October 31,  1988 are  to PHMCo.  From
October  31,  1988  to  December  19, 1989,  PHMC  was  a  direct,  wholly owned
subsidiary of PMCC. On December  19, 1989, all of the  common stock of PHMC  was
transferred   to,  and  PHMC  became  a  direct,  wholly  owned  subsidiary  of,
Residential Services Corporation of America,  a direct, wholly owned  subsidiary
of Prudential Insurance.
 
    PHMC  is engaged principally in the  business of originating and purchasing,
for its own account and for the account of its affiliates, residential  mortgage
loans  secured by one- to four-family homes located throughout the United States
and made in order to purchase those homes or to refinance prior loans secured by
such homes. PHMC  also processes  loans for other  originators. See  "--Mortgage
Origination Processing" below. The executive offices of PHMC are located at 8000
Maryland  Avenue, Suite 1400, Clayton, Missouri  63105, and its telephone number
is (314) 726-3900.
 
    PHMC is  an affiliate  of  Lender's Service,  Inc., a  Delaware  corporation
("LSI"),  formerly known as Lender's Service Acquisition Corporation, which is a
wholly owned subsidiary of  Residential Services Corporation  of America and  an
indirect  wholly  owned subsidiary  of Prudential  Insurance,  and which  is the
successor in interest to Lender's Service, Inc., a Pennsylvania corporation. LSI
maintains  a  relationship  with  a  nationwide  network  of  appraisers;  these
appraisers  perform work for LSI on an independent-contractor basis. Appraisals,
review appraisals  and recertifications  obtained  in connection  with  mortgage
loans  originated  or  acquired  by  PHMC  may  be  obtained  through  LSI.  See
"--Mortgage Loan Underwriting"  below. LSI  may also  act as  a title  insurance
agent  for various title insurance companies, and  as a vendor of credit reports
for UCB  Services,  a  national  mortgage reporting  company,  with  respect  to
mortgage  loans,  including the  Mortgage Loans.  PHMC is  also an  affiliate of
Prudential Property and  Casualty Insurance  Company, a  wholly owned,  indirect
subsidiary   of  Prudential  Insurance,  which  offers  casualty  insurance  for
residential properties, which may include  the Mortgaged Properties. PHMC is  an
affiliate  of The Prudential Bank  and Trust Company, a  Georgia bank, for which
PHMC processes  applications  for  home  equity  loans  secured  by  residential
properties,  which  may  include  the  Mortgaged  Properties.  PHMC  is  also an
affiliate of The Prudential Real Estate Affiliates, Inc., which may, directly or
through real estate brokers,  refer loan originations to  PHMC. PHMC is also  an
affiliate  of The Prudential Savings Bank, a savings and loan association, which
may offer services  to the mortgagors  of the  Mortgage Loans. PHMC  is also  an
affiliate  of  Prudential  Residential  Services  Limited  Partnership  and  The
Prudential Real  Estate Affiliates,  Inc. (collectively,  "PRR"). PRR  primarily
offers  relocation  services to  corporate  employees and  residential brokerage
services to the public. PRR may, directly or through real estate brokers,  refer
loan  originations  to PHMC.  PHMC is  also an  affiliate of  a number  of other
insurance providers (including providers of life, health, disability, automobile
and personal catastrophe insurance) and financial services
 
                                       42
<PAGE>
providers (including providers of annuities, mutual funds, retirement  accounts,
financial  planning services, credit cards, securities and commodities brokerage
and asset management), all of which may offer services to the mortgagors of  the
Mortgage Loans.
 
    PHMC  conducts its  mortgage loan processing  through centralized production
offices located in Costa Mesa, California, Frederick, Maryland and  Minneapolis,
Minnesota.  At  these locations,  PHMC receives  applications for  home mortgage
loans on toll-free  telephone numbers that  can be called  from anywhere in  the
United   States.  In  addition,  PHMC   maintains  marketing  offices  in  major
metropolitan centers in the United States. While the manner in which it conducts
its business does not generally entail face-to-face interactions with borrowers,
PHMC has varying  degrees of direct  contact with borrowers  under the  mortgage
origination  and acquisition programs  described below. Since  PHMC takes a more
active role in loan  processing in connection with  those programs that  involve
the referral of applicants, rather than the purchase of completed loan packages,
borrower  contact  tends  to  be  more  frequent  where  PHMC  functions  as the
originator of the mortgage loans.
 
    On May 31, 1991, PHMC acquired  certain assets and operations of A  Mortgage
Company,  formerly America's  Mortgage Company ("AMC"),  located in Springfield,
Illinois. AMC's business consisted primarily of the origination and  acquisition
of  mortgage loans insured  or guaranteed by  the Federal Housing Administration
and the  United States  Department  of Veterans  Affairs ("FHA/VA  loans"),  the
issuance  and sale of securities guaranteed  by the Government National Mortgage
Association ("GNMA"), which securities were backed by pools of FHA/VA loans, and
the servicing of such mortgage loans.  These activities are now being  conducted
by  PHMC  from the  Springfield, Illinois  location.  The description  of PHMC's
activities elsewhere in this  Prospectus relate to  conventional rather than  to
FHA/VA  loans, since the Mortgage  Loans to be included  in the Trust Estate for
any Series of Certificates will be comprised exclusively of conventional loans.
 
MORTGAGE LOAN PRODUCTION SOURCES
 
    Unless otherwise specified in  the applicable Prospectus Supplement,  PHMC's
primary  sources  of mortgage  loans are  (i)  selected corporate  clients, (ii)
mortgage brokers and similar  entities, and (iii)  other originators. The  first
two  categories involve  the origination of  mortgage loans by  PHMC through the
referral of applicants  to PHMC by  the respective sources;  the third  category
involves  the acquisition by PHMC of qualifying mortgage loans presented to PHMC
by such third  parties. The relative  contribution of each  of these sources  to
PHMC's  business, measured by the volume  of loans generated, tends to fluctuate
over time.
 
    Mortgage loans generated  through contacts  with corporate  clients or  with
mortgage  brokers and similar entities typically  involve the referral of a loan
applicant  to  PHMC;  the  gathering  of  credit-related  and  property-specific
information  by PHMC; and  the decision by  PHMC, based on  its analysis of such
information, as to the suitability of its making the loan. It is  characteristic
of PHMC's practice with respect to loans generated as a result of referrals from
these  two sources  that PHMC, itself,  orders appraisals  (most frequently, the
original appraisals, but in some  cases, review appraisals) and credit  reports.
The  level of involvement  by PHMC in  other aspects of  the processing of these
loans varies considerably; whereas, PHMC typically assists the borrower referred
by corporate clients through the application  stage, PHMC tends to have  limited
contact  with those borrowers whose applications  are processed on PHMC's behalf
by certain mortgage brokers or similar entities, as discussed below. Taken as  a
whole, however, PHMC's processing role in connection with loans generated either
as  a result of  referrals from corporate  clients or from  mortgage brokers and
similar entities generally exceeds the  more limited processing role  associated
with  loans acquired from PHMC's third  production source, other originators. It
is PHMC's  practice  to review  the  loan file  submitted  to it  by  the  other
originator;  order  a new  credit report;  under certain  limited circumstances,
order a review appraisal;  and, on the  basis of its analysis  of both the  data
that  it has received  and the data  that it has  gathered, determine whether to
accept or reject the loan. For each  loan purchased by PHMC, the seller, or  the
other originator that previously sold the loan to PHMC's seller, will have taken
the  borrower's loan application,  obtained the initial  credit reports, ordered
the original appraisal and provided  all necessary documentation and  disclosure
relating  to compliance with federal, state  or local law applicable to mortgage
loan origination and servicing.
 
                                       43
<PAGE>
    A majority of PHMC's corporate clients are companies that sponsor relocation
programs for their employees and in connection with which PHMC provides mortgage
financing. Eligibility  for  a relocation  loan  is  based, in  general,  on  an
employer's   providing  financial  assistance  to  the  relocating  employee  in
connection with a job-required  move. Although all  Subsidy Loans are  generated
through  such  corporate-sponsored  programs,  the  assistance  extended  by the
employer need  not  necessarily  take the  form  of  a loan  subsidy.  (Not  all
relocation  loans are  generated by  PHMC through  referrals from  its corporate
clients: some  relocation loans  are generated  as a  result of  referrals  from
mortgage  brokers  and similar  entities;  others are  generated  through PHMC's
acquisition of  mortgage  loans  from  other  originators.)  Also  among  PHMC's
corporate  clients are various professional associations. These associations, as
well as the other corporate clients,  promote the availability of a broad  range
of  PHMC mortgage  products to their  members or  employees, including refinance
loans, second-home loans and investment-property loans.
 
    Mortgage brokers, realtors (including  affiliates of Prudential  Insurance),
mortgage  bankers, commercial bankers, developers,  and builders also refer loan
applicants to PHMC.  Although the extent  to which mortgage  brokers or  similar
entities  will assist borrowers in  the application process varies considerably,
PHMC's role in the processing of  loans originated under this program  typically
involves the ordering of credit reports, as well as the ordering of the property
appraisal.  PHMC  may,  however,  permit certain  mortgage  brokers  and similar
entities to make  an initial determination  as to compliance  of mortgage  loans
with  PHMC's underwriting  guidelines. Under such  circumstances, the applicable
third parties take the loan  applications, obtain the borrowers' credit  reports
and  order  the property  appraisals from  qualified  appraisers. In  advance of
reaching a financing decision  with respect to such  loans, PHMC will  typically
order both review appraisals and additional credit reports.
 
    In  order  to qualify  for participation  in  PHMC's mortgage  loan purchase
programs, lending institutions must (i) meet and maintain certain net worth  and
other   financial   standards,  (ii)   demonstrate  experience   in  originating
residential  mortgage  loans,  (iii)  meet  and  maintain  certain   operational
standards,  (iv) evaluate each loan offered  to PHMC for consistency with PHMC's
underwriting guidelines and  (v) utilize the  services of qualified  appraisers.
The   contractual  arrangements  with  eligible   originators  may  involve  the
commitment by PHMC  to accept delivery  of a certain  dollar amount of  mortgage
loans over a period of time; this commitment may be satisfied either by delivery
of  mortgage loans  one at  a time or  in multiples  as aggregated  by the other
originator. In all instances, however, acceptance by PHMC is contingent upon the
loans being found  to satisfy PHMC's  program standards. PHMC  may also  acquire
portfolios of seasoned loans in negotiated transactions.
 
MORTGAGE LOAN UNDERWRITING
 
    In  determining  whether to  lend to  a particular  mortgage borrower  or to
purchase a mortgage loan, PHMC makes an assessment of the applicant's ability to
repay the loan, as well as an assessment  of the value of the property to  which
the  financing relates. The underwriting  standards that guide the determination
represent a balancing of several factors  that may affect the ultimate  recovery
of  the loan amount, including, among others,  the amount of the loan, the ratio
of the loan amount to the property value (i.e., the lower of the appraised value
of the  mortgaged property  and the  purchase price),  the borrower's  means  of
support  and the borrower's  credit history. PHMC's  guidelines for underwriting
may vary according  to the nature  of the borrower  or the type  of loan,  since
differing  characteristics may  be perceived  as presenting  different levels of
risk.
 
    PHMC's underwriting of  a mortgage  loan may be  based on  data obtained  by
parties  other than  PHMC that  are involved at  various stages  in the mortgage
origination or acquisition process. This typically occurs under circumstances in
which loans are subject to more  than one approval process, as when  third-party
lenders, certain mortgage brokers or similar entities that have been approved by
PHMC to process loans on its behalf, or independent contractors hired by PHMC to
perform  underwriting  services  on its  behalf  ("contract  underwriters") make
initial determinations as  to the  consistency of loans  with PHMC  underwriting
guidelines.   In  such  instances,   certain  information  may,   but  need  not
necessarily, be resolicited by PHMC in connection with its approval process. For
example, in connection with a mortgage loan that is presented to PHMC by another
originator for purchase, PHMC will typically  order a second credit report,  but
it will only
 
                                       44
<PAGE>
order  a review  appraisal under  certain limited  circumstances, in  advance of
reaching a purchase decision.  However, in connection  with mortgage loans  that
are  processed on PHMC's behalf by certain mortgage brokers or similar entities,
PHMC will customarily order both a second credit report and a review  appraisal.
When  contract  underwriters  are  used,  PHMC  will  generally  not  order  any
supplemental documentation but  will review the  information collected by  these
providers,  who are trained  by PHMC personnel  in PHMC's underwriting practices
and are required  to review  all loans  in accordance  with PHMC's  underwriting
guidelines.  In all cases, PHMC makes the final determination to approve or deny
the funding or purchase of a particular mortgage loan.
 
    The loan application elicits pertinent information about the applicant, with
particular emphasis on  the applicant's financial  health (assets,  liabilities,
income  and expenses), the property being financed and the type of loan desired.
A self-employed  applicant may  be required  to submit  his or  her most  recent
signed  federal  income tax  returns. With  respect  to every  applicant, credit
reports  are  obtained  from  commercial  reporting  services,  summarizing  the
applicant's  credit history with merchants  and lenders. Significant unfavorable
credit information reported by the applicant  or a credit reporting agency  must
be  explained by the applicant. The type of credit report that PHMC obtains, and
that  it  authorizes   parties  referring   loans  to   it  to   obtain,  is   a
computer-generated  report that  electronically merges  the information gathered
from  the  data  bases  of   two  major  consumer  credit  repositories   (these
repositories produce what are commonly referred to as "in-file" credit reports).
In  connection  with  its underwriting  procedure,  PHMC will,  with  the single
exception of the use of contract  underwriters, itself order a credit report  of
the  type described, whether  or not a  report has previously  been ordered with
respect to an applicant for whom another party has processed or approved of  the
loan. Certain of the credit reports that PHMC obtains may be purchased through a
credit reporting service with which LSI has a contractual relationship.
 
    Verifications  of employment,  income, assets  or mortgages  may be  used to
supplement  the  loan  application   and  the  credit   report  in  reaching   a
determination  as  to  the  applicant's  ability  to  meet  his  or  her monthly
obligations on the proposed mortgage loan, as well as his or her other  mortgage
payments  (if  any),  living  expenses  and  financial  obligations.  A mortgage
verification involves  obtaining information  regarding the  borrower's  payment
history  with  respect to  any existing  mortgage the  applicant may  have. This
verification is  accomplished by  either having  the present  lender complete  a
verification  of mortgage form, evaluating the  information on the credit report
concerning  the  applicant's   payment  history  for   the  existing   mortgage,
communicating,  either  verbally or  in  writing, with  the  applicant's present
lender or analyzing cancelled checks provided by the applicant. Verifications of
income, assets or  mortgages may  be waived  under certain  programs offered  by
PHMC, but PHMC's practice is to obtain verification of employment for every loan
applicant.   Waivers  limit  the   amount  of  documentation   required  for  an
underwriting decision and have the effect of increasing the relative  importance
of  the credit report  and the appraisal.  Such waivers or reduced-documentation
options are, in general, available for owner-occupied properties where the ratio
of the loan amount to the property value does not exceed 80%. The interest  rate
may  be higher with  respect to a loan  which has been  processed according to a
reduced documentation program than a loan which has been processed under a  full
documentation  program. Documentation requirements  vary based upon  a number of
factors, including the purpose of the loan, the amount of the loan and the ratio
of  the   loan   amount  to   the   property  value.   The   least   restrictive
reduced-documentation  programs apply to the applicant for a relocation loan and
to the borrower whose  loan amount does not  exceed $600,000 and whose  Loan-to-
Value  Ratio  is not  in  excess of  75%.  PHMC accepts  alternative  methods of
verification,  in  those   instances  where  verifications   are  part  of   the
underwriting  decision; for example, salaried income may be substantiated either
by means of a form independently prepared and signed by the applicant's employer
or by means of the applicant's most  recent paystub and W-2. In cases where  two
or  more persons have jointly applied for a mortgage loan, the gross incomes and
expenses of  all of  the applicants,  including nonoccupant  co-mortgagors,  are
combined and considered as a unit.
 
    All borrowers applying for relocation loans, as well as borrowers affiliated
with professional associations applying for loans with Loan-to-Value Ratios less
than  or  equal to  80%,  and all  other  borrowers applying  for non-relocation
mortgage loans with respect to which  the Loan-to-Value Ratios are less than  or
equal to 75%,
 
                                       45
<PAGE>
generally must demonstrate that the ratio of their total monthly housing debt to
their  monthly gross  income does not  exceed 33%,  and that the  ratio of their
total monthly debt to their monthly gross income does not exceed 38%;  borrowers
affiliated  with professional associations  applying for non-relocation mortgage
loans with  Loan-to-Value Ratios  in  excess of  80%,  and all  other  borrowers
applying  for non-relocation mortgage loans  with Loan-to-Value Ratios in excess
of  75%,  generally  must  satisfy  28%  and  36%  ratios,  respectively.  These
calculations are based on the amortization schedule and the interest rate of the
related  loan,  with each  ratio being  computed  on the  basis of  the proposed
monthly mortgage payment.  In the  case of adjustable-rate  mortgage loans,  the
interest  rate used to  determine a mortgagor's monthly  payment for purposes of
the foregoing ratios is the initial  mortgage interest rate, which is  generally
lower  than the sum of the index  that would have been applicable at origination
plus the applicable  margin. In  evaluating applications for  Subsidy Loans  and
Buy-Down  Loans,  the  foregoing  ratios  are  determined  by  including  in the
applicant's total monthly housing  expense and total  monthly debt the  proposed
monthly  mortgage payment  reduced by  the amount  expected to  be applied  on a
monthly basis under the related subsidy  agreement or buy-down agreement or,  in
certain  cases, the  mortgage payment  that would  result from  an interest rate
approximately 2.50%  lower  than the  Mortgage  Interest Rate.  See  "The  Trust
Estates--Mortgage  Loans." These ratios may be  exceeded if, in PHMC's judgment,
certain compensating  factors are  identified and  proved to  its  satisfaction,
including  a  large downpayment,  a  large equity  position  on a  refinance, an
excellent credit history,  substantial liquid  net worth, the  potential of  the
borrower  for continued employment advancement or  income growth, or the ability
of the borrower to accumulate assets or to devote a greater portion of income to
basic needs  such  as  housing  expense. Secondary  financing  is  permitted  on
mortgage  loans  under  certain  circumstances.  In  those  cases,  the  payment
obligations under  both primary  and  secondary financing  are included  in  the
computation  of  the debt-to-income  ratios  described above,  and  the combined
amount  of  primary  and  secondary  loans   will  be  used  to  calculate   the
Loan-to-Value  Ratio. Any  secondary financing  permitted will  generally mature
prior to  the maturity  date of  the  related mortgage  loan. In  evaluating  an
application  with respect to a "non-owner-occupied" property, which PHMC defines
as a property leased to a third party  by its owner (as distinct from a  "second
home,"  which PHMC defines as an owner-occupied, non-rental property that is not
the owner's principal residence), PHMC will permit projected rental income  from
such  property  to  be  included  in the  applicant's  monthly  gross  income if
necessary to satisfy the foregoing ratios. A mortgage loan secured by a two-  to
four-family Mortgaged Property is considered to be an owner-occupied property if
the  borrower occupies  one of the  units; rental  income on the  other units is
generally taken into account in evaluating  the borrower's ability to repay  the
mortgage loan.
 
    Property  value is  established in  connection with  the origination  of any
mortgage loan  (whether  the loan  is  originated for  purchase  or  refinancing
purposes)  by means  of an  appraisal, which is  typically ordered  by the party
originating the  related  mortgage  loan. Consistent  with  this  practice,  the
appraisals  with respect  to the loans  generated through  corporate contacts or
through referrals from mortgage  brokers or other  similar entities (other  than
those  certain mortgage brokers or similar  entities that process mortgage loans
on PHMC's  behalf) are  generally ordered  by PHMC,  while the  appraisals  with
respect  to the loans sold  to PHMC by third-party  lenders are ordered by those
other originators. PHMC may, however, at it discretion, order a review appraisal
with respect to any  loan generated by a  third-party lender; in addition,  PHMC
typically  orders review appraisals with respect  to loans that certain mortgage
brokers or similar entities process on its behalf. A review appraisal, like  the
original  appraisal,  involves  the  making  of  a  site  visit,  the  taking of
photographs, and the gathering of data on comparable properties. Unlike original
appraisals, however,  review appraisals  do  not include  an inspection  of  the
interior  of the  house. A  review appraisal is  generally used  to validate the
decision made based  upon the original  appraisal. If the  variance between  the
original  and the review appraisal is significant, an explanation will be sought
and the underwriting decision  may be reevaluated.  In certain instances,  which
most  frequently  involve the  postponement  of the  closing  with respect  to a
mortgage  loan  on  a  newly  built   home  due  to  construction  delays,   the
recertification  of an appraisal  may be required.  A recertification includes a
physical inspection  of the  exterior of  the  property and  a statement  by  an
appraiser that the present value of the property is no lower than that reflected
on the original appraisal.
 
                                       46
<PAGE>
    There can be no assurance that the values determined by the appraisers as of
the  dates  of appraisal  represent the  prices at  which the  related Mortgaged
Properties can be sold, either as of  the dates of appraisal or at  foreclosure.
The  appraisal  of any  Mortgaged Property  reflects the  individual appraiser's
judgment as to value, based on the market values of comparable homes sold within
the recent past in comparable nearby locations and on the estimated  replacement
cost.  The appraisal relates both  to the land and to  the structure; in fact, a
significant portion  of the  appraised  value of  a  Mortgaged Property  may  be
attributable  to the value of the land  rather than to the residence. Because of
the unique  locations  and special  features  of certain  Mortgaged  Properties,
identifying  comparable  properties in  nearby locations  may be  difficult. The
appraised values of such Mortgaged Properties will be based to a greater  extent
on  adjustments made  by the  appraisers to  the appraised  values of reasonably
similar properties rather than  on objectively verifiable  sales data. See  "The
Trust Estates--Mortgage Loans" herein.
 
    In  connection with  all mortgage loans  that it  originates, PHMC currently
obtains appraisals through LSI. Review appraisals with respect to mortgage loans
that PHMC acquires, or with respect  to mortgage loans that PHMC originates  but
that  certain mortgage  brokers or similar  entities process on  its behalf, are
also likely  to be  obtained through  LSI.  LSI also  provides its  services  to
third-party lenders which sell mortgage loans to PHMC.
 
    Most  residential mortgage lenders  have not originated  mortgage loans with
Loan-to-Value Ratios  in excess  of 80%  unless primary  mortgage insurance  was
obtained. PHMC, however, does not require primary mortgage insurance on loans up
to  $400,000 that have Loan-to-Value Ratios exceeding 80% but less than or equal
to 90%.  Only owner-occupied,  primary  residences (excluding  cooperatives  and
certain  high-rise condominium  dwellings) are  eligible for  this program. Each
qualifying loan will be made  at an interest rate that  is higher than the  rate
would  be if  the Loan-to-Value  Ratio was  80% or  less or  if primary mortgage
insurance was  obtained. Loans  that do  not  qualify for  such program  may  be
approved  if primary  mortgage insurance  is obtained  from an  approved primary
mortgage insurance company. In such cases,  the excess over 75% will be  covered
by primary mortgage insurance until the unpaid principal balance of the Mortgage
Loan is reduced to an amount that will result in a Loan-to-Value Ratio less than
or equal to 80%.
 
    Where  permitted by law, PHMC generally  requires that a borrower include in
each monthly payment a  portion of the real  estate taxes, assessments,  primary
mortgage  insurance  (if applicable),  and hazard  insurance premiums  and other
similar items with respect to the related mortgage loan. PHMC may, however, on a
case-by-case basis,  in its  discretion not  require such  advance payments  for
certain  Mortgage Loans, based on an evaluation of the borrowers' ability to pay
such taxes and charges as they become due.
 
MORTGAGE ORIGINATION PROCESSING
 
    PHMC, or  an  affiliate  of  PHMC, may  provide  loan  processing  services,
including  document preparation, underwriting analysis and closing functions, to
other loan originators. It  is possible that PHMC  may purchase loans from  such
loan  originators,  or  from mortgage  sellers  that purchased  loans  from such
originators, that PHMC itself processed. Any  such loans purchased by PHMC  will
meet PHMC's underwriting guidelines.
 
SERVICING
 
    Prior  to  June  30,  1989, all  residential  mortgage  loans  originated or
purchased by PHMC for its own account or for the account of Prudential Insurance
were serviced by its affiliate, PMCC. On June 30, 1989, PHMC assumed all of  the
residential  mortgage servicing activities then being  performed by PMCC. On May
31, 1991, PHMC entered into a Subservicing Agreement with AMC pursuant to  which
PHMC   will  sub-service  AMC's  current   servicing  portfolio  of  FHA/VA  and
conventional loans. PHMC is an approved servicer of FNMA, FHLMC and GNMA. As  of
December  31, 1991,  PHMC had  a net  worth of  approximately $213  million. See
"Servicing of the Mortgage Loans--The Servicer" below.
 
                                       47
<PAGE>
                                USE OF PROCEEDS
 
    The net proceeds from the sale of  each Series of Certificates will be  used
by  the  Seller  for the  purchase  of  the Mortgage  Loans  represented  by the
Certificates of such Series  from PHMC. It  is expected that  PHMC will use  the
proceeds  from the  sale of  the Mortgage  Loans to  the Seller  for its general
business purposes, including, without limitation, the origination or acquisition
of new mortgage loans  and the repayment of  borrowings incurred to finance  the
origination  or  acquisition of  mortgage  loans, including  the  Mortgage Loans
underlying the Certificates of such Series.
 
                        SERVICING OF THE MORTGAGE LOANS
 
THE SERVICER
 
    The Servicer with  respect to  a Series of  Certificates will  be PHMC.  See
"PHMC--Servicing"  above. The Servicer may subcontract its servicing obligations
under any Pooling and  Servicing Agreement. The  Servicer will remain  primarily
liable  for any such subservicer's performance in accordance with the applicable
Pooling  and  Servicing  Agreement.  The  Servicer  may  be  released  from  its
obligations   in  certain   circumstances.  See   "Servicing  of   the  Mortgage
Loans--Certain Matters Regarding the Servicer."
 
    Each Prospectus Supplement relating to a Series of Certificates will contain
information concerning recent delinquency, foreclosure and loan loss  experience
on  the  mortgage  loans  included  in  PHMC's  servicing  portfolio  which were
originated or acquired by  PHMC for its  own account or for  the account of  its
affiliates  ("Program Loans"), and, if available,  on those Program Loans having
payment terms generally similar  to those of the  Mortgage Loans in the  related
Trust  Estate. PHMC's total servicing portfolio of  Program Loans as of any date
may include  loans  having  a  variety  of  payment  characteristics,  including
adjustable  rate mortgage loans and loans subject to subsidy agreements, and the
overall delinquency, foreclosure and loan  loss experience of the Program  Loans
taken  as a whole  may differ from that  of the Mortgage  Loans contained in any
given Trust Estate and from that of mortgage servicers generally.
 
PAYMENTS ON MORTGAGE LOANS
 
    The Servicer will, as to each Series of Certificates, establish and maintain
a  separate  trust  account  or  accounts  in  the  name  of  the  Trustee  (the
"Certificate  Account"), which must be  maintained with a depository institution
(the "Depository") acceptable to the Rating Agency or Rating Agencies rating the
Certificates of  such  Series. Such  account  or  accounts will  be  either  (i)
maintained with a Depository whose long-term debt obligations at the time of any
deposit  therein are rated  not lower than  the rating on  the related Series of
Certificates at the time of the  initial issuance thereof or (ii) fully  insured
by  the Federal  Deposit Insurance Corporation  (the "FDIC")  through either the
Bank Insurance Fund or the Savings Association Insurance Fund, (iii) insured  by
the FDIC (to the limit established by the FDIC), the uninsured deposits in which
accounts are otherwise secured such that, as evidenced by an opinion of counsel,
the  Trustee of  the related  Series has a  claim with  respect to  funds in the
Certificate Account for  such Series, or  a perfected security  interest in  any
collateral  securing such  funds, that  is superior to  the claims  of any other
depositor or  general creditor  of  the Depository  with which  the  Certificate
Account  is maintained  or (iv)  such other  account that  is acceptable  to the
Rating Agency or Rating Agencies rating the Certificates of such Series and,  if
a  REMIC election has been  made, that would not  cause the related Trust Estate
(or a segregated pool of assets therein) to fail to qualify as a REMIC.
 
    The Servicer will  deposit in  the Certificate  Account for  each Series  of
Certificates  any  amounts  representing  scheduled  payments  of  principal and
interest on  the  Mortgage Loans  due  after  the applicable  Cut-Off  Date  but
received  on or prior thereto, and, on a daily basis, except as specified in the
applicable  Pooling  and  Servicing   Agreement,  the  following  payments   and
collections received or made by it with respect to the Mortgage Loans subsequent
to the applicable Cut-Off Date (other than payments due on or before the Cut-Off
Date):
 
         (i)  all payments on  account of principal,  including prepayments, and
    interest;
 
                                       48
<PAGE>
        (ii) all  amounts  received  by  the Servicer  in  connection  with  the
    liquidation  of  defaulted Mortgage  Loans or  property acquired  in respect
    thereof, whether through foreclosure  sale or otherwise, including  payments
    in  connection  with defaulted  Mortgage Loans  received from  the mortgagor
    other than amounts  required to  be paid to  the mortgagor  pursuant to  the
    terms  of  the  applicable  Mortgage  Loan  or  otherwise  pursuant  to  law
    ("Liquidation Proceeds") less, to the extent permitted under the  applicable
    Pooling  and Servicing  Agreement, the  amount of  any expenses  incurred in
    connection with the liquidation of such Mortgage Loans;
 
        (iii) all proceeds received by the  Servicer under any title, hazard  or
    other  insurance policy covering any such Mortgage Loan, other than proceeds
    to be applied to the  restoration or repair of  the property subject to  the
    related  Mortgage  or  released  to the  mortgagor  in  accordance  with the
    applicable Pooling and Servicing Agreement;
 
        (iv) all  amounts required  to  be deposited  therein from  any  related
    Reserve  Fund,  and  amounts  available  under  any  other  form  of  credit
    enhancement applicable to such Series;
 
        (v) all Periodic Advances made by the Servicer;
 
        (vi) all amounts withdrawn from Buy-Down Funds or Subsidy Funds, if any,
    with respect to  such Mortgage Loans,  in accordance with  the terms of  the
    respective agreements applicable thereto;
 
       (vii)  all proceeds  of any such  Mortgage Loans or  property acquired in
    respect thereof  purchased  or  repurchased  pursuant  to  the  Pooling  and
    Servicing Agreement; and
 
       (viii) all other amounts required to be deposited therein pursuant to the
    applicable Pooling and Servicing Agreement.
 
    Notwithstanding  the  foregoing,  the  Servicer  will  be  entitled,  at its
election, either (a)  to withhold and  pay itself the  applicable Servicing  Fee
and/or  to withhold and  pay to the  owner thereof the  Fixed Retained Yield, if
any, from any payment or other recovery  on account of interest as received  and
prior  to deposit in the  Certificate Account or (b)  to withdraw the applicable
Servicing Fee and/or  the Fixed  Retained Yield,  if any,  from the  Certificate
Account  after  the  entire  payment or  recovery  has  been  deposited therein;
provided, however, that with respect to each Trust Estate (or a segregated  pool
of  assets therein)  as to which  a REMIC  election has been  made, the Servicer
will, in each instance, withhold and pay to the owner thereof the Fixed Retained
Yield prior to  deposit of the  related payment or  recovery in the  Certificate
Account.
 
    Periodic  Advances,  amounts withdrawn  from  any Buy-Down  Fund  or Subsidy
Account, amounts withdrawn from  any reserve fund,  and amounts available  under
any  other  form of  credit enhancement,  will be  deposited in  the Certificate
Account not later than the business day preceding the Distribution Date on which
such amounts are required to be distributed. All other amounts will be deposited
in the Certificate Account  not later than the  business day next following  the
day of receipt and posting by the Servicer.
 
    If  the Servicer deposits in the Certificate Account for a Series any amount
not required to be deposited  therein, it may at  any time withdraw such  amount
from  such Certificate Account. Funds on  deposit in the Certificate Account may
be invested in certain Eligible Investments  maturing in general not later  than
the  business day  preceding the  next Distribution Date.  In the  event that an
election has been made to treat the Trust Estate (or a segregated pool of assets
therein) with respect to a Series as a REMIC, no such Eligible Investments  will
be  sold or  disposed of  at a gain  prior to  maturity unless  the Servicer has
received an opinion of  counsel or other evidence  satisfactory to it that  such
sale  or disposition  will not  cause the  Trust Estate  (or segregated  pool of
assets) to be subject  to the tax on  "prohibited transactions" imposed by  Code
Section  860F(a)(1), otherwise subject  the Trust Estate  (or segregated pool of
assets) to tax, or cause the Trust Estate (or segregated pool of assets) to fail
to qualify  as  a  REMIC.  Except  as  otherwise  specified  in  the  applicable
Prospectus  Supplement, all  income and gain  realized from  any such investment
will be for the account of the Servicer as additional servicing compensation and
all losses from any such investment will  be deposited by the Servicer into  the
Certificate Account immediately as realized.
 
                                       49
<PAGE>
    The  Servicer is permitted, from time to  time, to make withdrawals from the
Certificate Account for the following purposes,  to the extent permitted in  the
applicable Pooling and Servicing Agreement:
 
         (i) to reimburse itself for Periodic Advances;
 
        (ii)  to  reimburse  itself  for liquidation  expenses  and  for amounts
    expended by it in connection with the restoration of damaged property;
 
        (iii) to pay to itself the applicable Servicing Fee and/or pay the owner
    thereof any Fixed Retained Yield, in the event the Servicer is not required,
    and has elected not, to  withhold such amounts out  of any payment or  other
    recovery  with respect to a particular Mortgage Loan prior to the deposit of
    such payment or recovery in the Certificate Account;
 
        (iv) to reimburse itself for  certain expenses (including taxes paid  on
    behalf  of the Trust Estate) incurred  by and recoverable by or reimbursable
    to it;
 
        (v) to pay to the Seller with respect to each Mortgage Loan or  property
    acquired  in respect  thereof that has  been repurchased by  the Seller, all
    amounts received thereon and not distributed as of the date as of which  the
    purchase price of such Mortgage Loan was determined;
 
        (vi)  to pay itself  any interest earned on  or investment income earned
    with respect  to funds  in the  Certificate Account  (all such  interest  or
    income to be withdrawn not later than the next Distribution Date);
 
       (vii)  to pay itself from net Liquidation Proceeds allocable to interest,
    the amount of any unpaid Servicing Fees and any unpaid assumption fees, late
    payment charges or other mortgagor charges on the related Mortgage Loan;
 
       (viii) to withdraw from the  Certificate Account any amount deposited  in
    the Certificate Account that was not required to be deposited therein;
 
        (ix)  to make withdrawals from the  Certificate Account in order to make
    distributions to Certificateholders; and
 
        (x) to clear and terminate the Certificate Account.
 
    The Servicer  will be  authorized to  appoint a  paying agent  (the  "Paying
Agent")  to make distributions, as agent for the Servicer, to Certificateholders
of a Series. If  the Paying Agent for  a Series is the  Trustee of such  Series,
such  Paying Agent will  be authorized to make  withdrawals from the Certificate
Account in  order to  make distributions  to Certificateholders.  If the  Paying
Agent  for a Series is not the Trustee for such Series, the Servicer will, prior
to each Distribution Date, deposit in immediately available funds in an  account
designated  by the  Paying Agent  the amount required  to be  distributed to the
Certificateholders on such Distribution Date.
 
    The Servicer will cause any Paying Agent which is not the Trustee to execute
and deliver to the Trustee an instrument in which such Paying Agent agrees  with
the Trustee that such Paying Agent will:
 
        (1)  hold all amounts deposited with it by the Servicer for distribution
    to Certificateholders in trust for  the benefit of Certificateholders  until
    such  amounts are distributed to Certificateholders or otherwise disposed of
    as provided in the applicable Pooling and Servicing Agreement;
 
        (2) give the Trustee notice of any default by the Servicer in the making
    of such deposit; and
 
        (3) at any time during the continuance of any such default, upon written
    request of the  Trustee, forthwith pay  to the Trustee  all amounts held  in
    trust by such Paying Agent.
 
                                       50
<PAGE>
PERIODIC ADVANCES AND LIMITATIONS THEREON
 
    With  respect  to each  Series,  the Servicer  will  agree to  make Periodic
Advances in the amounts specified in the applicable Prospectus Supplement. Funds
of the  Servicer so  advanced are  recoverable by  the Servicer  out of  amounts
received  on Mortgage Loans with  respect to which such  funds were advanced and
which represent late  recoveries of principal  and/or interest respecting  which
any  such Periodic  Advance was  made, or, if  the Servicer  determines that any
Periodic Advance may not be so recoverable, out of any funds in the  Certificate
Account.  The Servicer  will make Periodic  Advances only if  it determines that
funds will  ultimately  be  available  to reimburse  it.  If  specified  in  the
applicable Prospectus Supplement, a reserve fund may be established with respect
to  any Series  of Certificates in  order to  provide a source  of liquidity for
Periodic Advances by the  Servicer. Any such  reserve fund will  be funded by  a
deposit  made by the Servicer in such an amount specified, and will otherwise be
as described, in the applicable Prospectus Supplement.
 
ADJUSTMENT TO SERVICING FEE IN CONNECTION WITH PREPAID AND LIQUIDATED MORTGAGE
LOANS
 
    When a mortgagor prepays all of a Mortgage Loan, the mortgagor pays interest
on the amount prepaid only to the date on which the principal prepayment in full
is made.  Similarly, Liquidation  Proceeds from  a Mortgaged  Property will  not
include  interest for any  period after the  date on which  the liquidation took
place, and  insurance  proceeds  may  include  interest  only  to  the  date  of
settlement  of the related claims.  Further, when a Mortgage  Loan is prepaid in
part, and  such prepayment  is applied  as of  a date  other than  the Due  Date
occurring  in  the month  of  receipt or  the Due  Date  occurring in  the month
following the  month of  receipt,  the mortgagor  pays  interest on  the  amount
prepaid  only to  the date  of prepayment  and not  thereafter. Unless otherwise
specified in  the applicable  Prospectus Supplement,  in order  to mitigate  the
adverse  effect to Certificateholders of a  Series resulting from the prepayment
in full or liquidation of  a Mortgage Loan or  settlement of an insurance  claim
with  respect thereto, the amount of the aggregate Servicing Fees will be offset
by an amount equal to the accrual of interest on any fully prepaid or liquidated
Mortgage Loan at the Net Mortgage Interest Rate for such Mortgage Loan from  the
date  of its prepayment or liquidation or  the date of such insurance settlement
to but not including  the next Due Date  (the "Prepayment Interest  Shortfall").
Such  reductions in the  aggregate Servicing Fees  will be made  by the Servicer
with respect to the  Mortgage Loans under the  applicable Pooling and  Servicing
Agreement,  but  only  to  the extent  that  the  aggregate  Prepayment Interest
Shortfall does not exceed the aggregate amount of the Servicing Fee relating  to
mortgagor  payments or other recoveries  distributed on the related Distribution
Date. The amount  of the  offset against the  aggregate Servicing  Fees will  be
included  in the distributions to Certificateholders on the Distribution Date on
which the  related  principal  prepayments  in  full,  Liquidation  Proceeds  or
insurance  proceeds are  passed through to  Certificateholders. Unless otherwise
specified in  the  applicable  Prospectus  Supplement,  any  interest  shortfall
arising  from application by the Servicer of partial prepayments other than on a
Due Date will be borne solely  by Certificateholders of the related Series.  See
"Prepayment  and  Yield  Considerations." Payments  of  the  Prepayment Interest
Shortfall or Curtailment Interest Shortfall will not be obtained by means of any
subordination of  the rights  of Subordinated  Certificateholders or  any  other
credit enhancement arrangement.
 
REPORTS TO CERTIFICATEHOLDERS
 
    Unless  otherwise specified or modified in the related Pooling and Servicing
Agreement for each Series, the Servicer will include, or, in the event a  Paying
Agent  has been  appointed with  respect to such  Series, will  cause the Paying
Agent to include, with each distribution to Certificateholders of record of such
Series a statement setting forth the following information, if applicable:
 
         (i)  to  each  holder  of  a  Certificate  other  than  a   Multi-Class
    Certificate,  the amount of such distribution  allocable to principal of the
    related Mortgage Loans, separately identifying  the aggregate amount of  any
    principal  prepayments  included therein,  the  amount of  such distribution
    allocable to interest on the related Mortgage Loans and the aggregate unpaid
    principal balance of the Mortgage Loans evidenced by each Class after giving
    effect to the principal distributions on such Distribution Date;
 
                                       51
<PAGE>
        (ii) to each holder  of a Multi-Class Certificate  on which an  interest
    distribution and a distribution in reduction of Stated Amount are then being
    made, the amount of such interest distribution and distribution in reduction
    of Stated Amount, and the Stated Amount of each Class after giving effect to
    the  distribution in  reduction of Stated  Amount made  on such Distribution
    Date;
 
        (iii)  to  each  holder  of   a  Multi-Class  Certificate  on  which   a
    distribution  of  interest only  is then  being  made, the  aggregate Stated
    Amount of Certificates outstanding of each Class after giving effect to  the
    distribution  in reduction of  Stated Amount made  on such Distribution Date
    and on any Special Distribution Date  occurring subsequent to the last  such
    report  and after including in the aggregate Stated Amount the Stated Amount
    of the Compound Interest Certificates, if any, outstanding and the amount of
    any accrued interest added  to the Stated Amount  of such Compound  Interest
    Certificates on such Distribution Date;
 
        (iv)  to each  holder of a  Multi-Class Certificate which  is a Compound
    Interest Certificate (but  only if  such holder  shall not  have received  a
    distribution  of interest equal to the  entire amount of interest accrued on
    such Certificate with respect to such Distribution Date):
 
           (a) the information  contained in  the report  delivered pursuant  to
       clause (ii) above;
 
           (b)   the  interest  accrued  on  such  Class  of  Compound  Interest
       Certificates with  respect to  such Distribution  Date and  added to  the
       Stated Amount of such Compound Interest Certificate; and
 
           (c) the Stated Amount of such Class of Compound Interest Certificates
       after  giving  effect to  the addition  thereto  of all  interest accrued
       thereon;
 
        (v)  to  each  holder  of   a  Certificate,  the  amount  of   servicing
    compensation  with  respect  to  the related  Trust  Estate  and  such other
    customary information as the Servicer deems necessary or desirable to enable
    Certificateholders to prepare their tax returns;
 
        (vi) to each holder of a Certificate, the amount by which the  Servicing
    Fee  has been reduced by the aggregate Prepayment Interest Shortfall for the
    related Distribution Date;
 
       (vii) the  aggregate amount  of  any Periodic  Advances by  the  Servicer
    included in the amounts actually distributed to the Certificateholders;
 
       (viii)  to each holder of each  Senior Certificate (other than a Shifting
    Interest Certificate):
 
           (a)  the  amount  of  funds,  if  any,  otherwise  distributable   to
       Subordinated Certificateholders and the amount of any withdrawal from the
       Subordination  Reserve Fund  included in amounts  actually distributed to
       Senior Certificateholders;
 
           (b)  the  Subordinated  Amount  remaining  and  the  balance  in  the
       Subordination Reserve Fund following such distribution; and
 
           (c) the amount of any Senior Class Shortfall with respect to, and the
       amount of any Senior Class Carryover Shortfall outstanding prior to, such
       Distribution Date;
 
        (ix)  to  each  holder of  a  Certificate  entitled to  the  benefits of
    payments under any form of credit enhancement or from any reserve fund other
    than the Subordination Reserve Fund:
 
           (a) the  amounts  so  distributed  under  any  such  form  of  credit
       enhancement  or from any such reserve fund on the applicable Distribution
       Date; and
 
           (b) the amount of  coverage remaining under any  such form of  credit
       enhancement  and the balance in any such fund, after giving effect to any
       payments thereunder and other amounts charged thereto on the Distribution
       Date;
 
                                       52
<PAGE>
        (x) in the case of a Series of Certificates with a variable Pass-Through
    Rate, such Pass-Through Rate;
 
        (xi) the  book value  of any  collateral acquired  by the  Trust  Estate
    through foreclosure or otherwise;
 
        (xii)  the unpaid principal balance of any Mortgage Loan as to which the
    Servicer has determined  not to  foreclose because it  believes the  related
    Mortgaged  Property may be contaminated with or affected by hazardous wastes
    or hazardous substances; and
 
       (xiii) the number and  aggregate principal amount  of Mortgage Loans  one
    month, two months and three or more months delinquent.
 
    In  addition,  within a  reasonable period  of  time after  the end  of each
calendar year, the Servicer will furnish either directly, or through the  Paying
Agent,  if any, a report to each  Certificateholder of record at any time during
such calendar year (a) as to the  aggregate of amounts reported pursuant to  (i)
and  (ii) above,  as applicable, for  such calendar  year or, in  the event such
person was a Certificateholder of record during a portion of such calendar year,
for the  applicable portion  of such  year  and (b)  such other  information  as
required  by the Code and applicable  regulations thereunder and as the Servicer
deems necessary or desirable to  enable Certificateholders to prepare their  tax
returns.  (Section 4.02.) In the  event that an election  has been made to treat
the Trust  Estate (or  a segregated  pool of  assets therein)  as a  REMIC,  the
Trustee  will be required  to sign the  Federal income tax  returns of the REMIC
(which will  be prepared  by  the Servicer).  See  "Certain Federal  Income  Tax
Consequences--Federal  Income Tax Consequences for REMIC Certificates-- Taxation
of Residual Certificates--Administrative Matters."
 
REPORTS TO THE TRUSTEE
 
    No later  than  15 days  after  each Distribution  Date  for a  Series,  the
Servicer will provide the Trustee of such Series with a report setting forth the
status  of the related Certificate Account and the related Subordination Reserve
Fund and any other reserve fund as of the close of business on such Distribution
Date, stating that all distributions required  to be made by the Servicer  under
the  applicable  Pooling  and Servicing  Agreement  have  been made  (or  if any
required distribution has not been made  by the Servicer, specifying the  nature
and  status thereof) and showing, for the  period covered by such statement, the
aggregate of deposits to and withdrawals  from the Certificate Account for  each
category  of deposits  and withdrawals  specified in  the Pooling  and Servicing
Agreement. Such statement shall also include information as to (i) the aggregate
unpaid principal balances of all the Mortgage Loans as of the close of  business
on the last day of the month preceding the month in which such Distribution Date
occurs;  and (ii)  the amount  of any Subordination  Reserve Fund  and any other
reserve fund,  as  of  such  Distribution  Date  (after  giving  effect  to  the
distributions on such Distribution Date). Copies of such reports may be obtained
by Certificateholders upon request in writing addressed to the Servicer, c/o The
Prudential  Home  Mortgage Company,  Inc., 7470  New Technology  Way, Frederick,
Maryland 21701. If the Servicer should fail to provide such copies, they may  be
obtained from the Trustee. (Section 3.12).
 
COLLECTION AND OTHER SERVICING PROCEDURES
 
    The Servicer will make reasonable efforts to collect all payments called for
under  the Mortgage Loans  and will, consistent with  the applicable Pooling and
Servicing Agreement and any  applicable agreement governing  any form of  credit
enhancement,  follow such  collection procedures as  it follows  with respect to
mortgage loans  serviced  by it  that  are  comparable to  the  Mortgage  Loans.
Consistent  with the above, the  Servicer may, in its  discretion, (i) waive any
prepayment charge, assumption fee,  late payment charge or  any other charge  in
connection  with  the prepayment  of a  Mortgage  Loan and  (ii) arrange  with a
mortgagor a schedule for  the liquidation of deficiencies  running for not  more
than 180 days after the applicable Due Date.
 
    Under  the  Pooling and  Servicing Agreement,  the  Servicer, to  the extent
permitted by law, will establish and  maintain one or more escrow accounts  (the
"Servicing  Account")  in which  the Servicer  will be  required to  deposit any
payments made by mortgagors in advance for taxes, assessments, primary  mortgage
(if   applicable)  and  hazard  insurance  premiums  and  other  similar  items.
Withdrawals from the Servicing Account may  be made to effect timely payment  of
taxes, assessments, mortgage and hazard insurance, to
 
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<PAGE>
refund  to  mortgagors amounts  determined to  be overages,  to pay  interest to
mortgagors on balances in the Servicing  Account, if required, and to clear  and
terminate  such account. The Servicer will be responsible for the administration
of each Servicing  Account. The Servicer  will be obligated  to advance  certain
amounts  which are  not timely  paid by  the mortgagors,  to the  extent that it
determines, in  good faith,  that  they will  be  recoverable out  of  insurance
proceeds,   liquidation  proceeds,  or  otherwise.  Alternatively,  in  lieu  of
establishing a Servicing Account, the Servicer may procure a performance bond or
other form of insurance coverage, in  an amount acceptable to the Rating  Agency
rating  the  related Series  of Certificates,  covering  loss occasioned  by the
failure to escrow such amounts. (Section 3.06.)
 
ENFORCEMENT OF DUE-ON-SALE CLAUSES; REALIZATION UPON DEFAULTED MORTGAGE LOANS
 
    With respect to  each Mortgage  Loan having  a fixed  interest rate,  unless
otherwise  specified in the  applicable Prospectus Supplement,  each Pooling and
Servicing Agreement will provide that, when  any Mortgaged Property is about  to
be  conveyed by the mortgagor, the Servicer will, to the extent it has knowledge
of such prospective conveyance, exercise  its rights to accelerate the  maturity
of such Mortgage Loan under the "due-on-sale" clause applicable thereto, if any,
unless  it is  not exercisable  under applicable law  or if  such exercise would
result in  loss of  insurance coverage  with respect  to such  Mortgage Loan  or
would,  in the Servicer's judgment, be reasonably likely to result in litigation
by the mortgagor. In either  case, the Servicer is  authorized to take or  enter
into  an assumption and modification  agreement from or with  the person to whom
such Mortgaged Property has been or is  about to be conveyed, pursuant to  which
such  person becomes  liable under the  Mortgage Note and,  unless prohibited by
applicable state law, the  mortgagor remains liable  thereon, provided that  the
Mortgage  Loan will continue to be covered  by any pool insurance policy and any
related primary mortgage insurance  policy and the  Mortgage Interest Rate  with
respect  to such Mortgage Loan and the payment terms shall remain unchanged. The
Servicer will also be  authorized, with the prior  approval of the pool  insurer
and  the  primary mortgage  insurer, if  any,  to enter  into a  substitution of
liability agreement with such person,  pursuant to which the original  mortgagor
is  released  from liability  and such  person is  substituted as  mortgagor and
becomes liable under the Mortgage Note. (Section 3.08)
 
    The Servicer is obligated under the Pooling and Servicing Agreement for each
Series to realize upon  defaulted Mortgage Loans in  accordance with its  normal
servicing  practices, which will conform generally  to those of prudent mortgage
lending institutions which service mortgage loans  of the same type in the  same
jurisdictions.  Notwithstanding the foregoing, the  Servicer is authorized under
the Pooling and  Servicing Agreement  to permit  the assumption  of a  defaulted
Mortgage  Loan rather than to foreclose  or accept a deed-in-lieu of foreclosure
if, in the  Servicer's judgment, the  default is  unlikely to be  cured and  the
assuming  borrower meets PHMC's underwriting  guidelines. In connection with any
such assumption, the Mortgage Interest Rate and the payment terms of the related
Mortgage Note  will  not  be  changed. See  also  "The  Trust  Estates--Mortgage
Loans--Optional  Repurchases,"  above, with  respect  to the  Seller's  right to
repurchase defaulted Mortgage  Loans. Further,  the Servicer  may encourage  the
refinancing  of  such defaulted  Mortgage Loans,  including Mortgage  Loans that
would permit creditworthy borrowers to  assume the outstanding indebtedness.  In
the  case of foreclosure or of damage  to a Mortgaged Property from an uninsured
cause, the Servicer  is not required  to expend  its own funds  to foreclose  or
restore  any damaged  property, unless  it reasonably  determines (i)  that such
foreclosure or restoration will increase  the proceeds to Certificateholders  of
such  Series  of liquidation  of the  Mortgage Loan  after reimbursement  of the
Servicer for its expenses and (ii) that such expenses will be recoverable to  it
through  Liquidation Proceeds. In  the event that the  Servicer has expended its
own funds for foreclosure or to restore damaged property, it will be entitled to
charge the Certificate Account for such Series an amount equal to all costs  and
expenses incurred by it. (Sections 3.03 and 3.09).
 
    The  Servicer is not obligated to  foreclose on any Mortgaged Property which
it believes  may  be  contaminated  with or  affected  by  hazardous  wastes  or
hazardous   substances.   See   "Certain   Legal   Aspects   of   the   Mortgage
Loans--Environmental Considerations." If  the Servicer does  not foreclose on  a
Mortgaged  Property, the Certificateholders of the related Series may experience
a loss on the related Mortgage Loan.
 
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<PAGE>
The Servicer  will  not be  liable  to the  Certificateholders  if it  fails  to
foreclose  on a Mortgaged Property  which it believes may  be so contaminated or
affected, even if such  Mortgaged Property is, in  fact, not so contaminated  or
affected.  Conversely, the Servicer will not be liable to the Certificateholders
if, based  on  its belief  that  no such  contamination  or effect  exists,  the
Servicer  forecloses on a  Mortgaged Property and takes  title to such Mortgaged
Property, and  thereafter  such  Mortgaged  Property  is  determined  to  be  so
contaminated or affected.
 
    The  Servicer may foreclose  against property securing  a defaulted Mortgage
Loan either by foreclosure, by sale or by strict foreclosure and in the event  a
deficiency  judgment is  available against  the mortgagor  or other  person (see
"Certain Legal Aspects  of the Mortgage  Loans--Anti-Deficiency Legislation  and
Other Limitations on Lenders" for a discussion of the availability of deficiency
judgments), may proceed for the deficiency. It is anticipated that in most cases
the  Servicer  will  not seek  deficiency  judgments,  and the  Servicer  is not
required under the Pooling and Servicing Agreement to seek deficiency judgments.
 
    With respect to a Trust Estate (or  a segregated pool of assets therein)  as
to  which a REMIC election  has been made, if  the trustee acquires ownership of
any Mortgaged Property  as a  result of  a default  or imminent  default of  any
Mortgage  Loan secured by such Mortgaged  Property, the Trustee will be required
to dispose of such  property within two years  following its acquisition by  the
Trust  Estate. The  Servicer also will  be required to  administer the Mortgaged
Property in a  manner which does  not cause  the Mortgaged Property  to fail  to
qualify  as "foreclosure property" within the meaning of Code Section 860G(a)(8)
or result in the receipt by the Trust Estate of any "net income from foreclosure
property" within  the  meaning  of Code  Section  860G(c)(2),  respectively.  In
general,  this would preclude the  holding of the Mortgaged  Property by a party
acting as a dealer in such property or the receipt of rental income based on the
profits of  the  lessee  of  such property.  See  "Certain  Federal  Income  Tax
Consequences."
 
FIXED RETAINED YIELD, SERVICING COMPENSATION AND PAYMENT OF EXPENSES
 
    Fixed  Retained Yield with respect to any  Mortgage Loan is that portion, if
any, of interest  at the  Mortgage Interest  Rate that  is not  included in  the
related  Trust  Estate.  The Prospectus  Supplement  for a  Series  will specify
whether there is any Fixed Retained Yield with respect to the Mortgage Loans  of
such  Series.  If  so,  the  Fixed  Retained  Yield  will  be  established  on a
loan-by-loan basis  and will  be specified  in the  schedule of  Mortgage  Loans
attached  as an exhibit  to the applicable Pooling  and Servicing Agreement. The
Servicer may deduct the Fixed Retained Yield from mortgagor payments as received
and prior to deposit of such payments in the Certificate Account for such Series
or may  (unless an  election has  been  made to  treat the  Trust Estate  (or  a
segregated pool of assets therein) as a REMIC) withdraw the Fixed Retained Yield
from  the Certificate Account after the entire payment has been deposited in the
Certificate Account. Notwithstanding the foregoing, with respect to any  payment
of  interest received by the Servicer relating  to a Mortgage Loan (whether paid
by the  mortgagor or  received as  Liquidation Proceeds,  insurance proceeds  or
otherwise)  which is less than the full amount of interest then due with respect
to such Mortgage Loan,  the owner of  the Fixed Retained  Yield with respect  to
such  Mortgage Loan will receive  as its Fixed Retained  Yield only its pro rata
share of such interest payment.
 
    For each Series of  Certificates, the Servicer will  be entitled to be  paid
the  Servicing  Fee  on the  related  Mortgage  Loans until  termination  of the
applicable Pooling and Servicing Agreement, subject, unless otherwise  specified
in  the  applicable  Prospectus  Supplement, to  adjustment  as  described under
"Adjustment to Servicing Fee in Connection with Prepaid and Liquidated  Mortgage
Loans."  The Servicer, at its election, will  pay itself the Servicing Fee for a
Series with respect to each Mortgage  Loan by (a) withholding the Servicing  Fee
from  any scheduled payment of interest prior  to deposit of such payment in the
Certificate Account for such  Series or (b) withdrawing  the Servicing Fee  from
the  Certificate Account after the entire interest payment has been deposited in
the Certificate Account. The Servicer may also pay itself out of the Liquidation
Proceeds of  a  Mortgage Loan  or  other  recoveries with  respect  thereto,  or
withdraw  from the Certificate Account, or if such Liquidation Proceeds or other
recoveries are insufficient, from  Net Foreclosure Profits  with respect to  the
related  Distribution Date the Servicing Fee in respect of such Mortgage Loan to
the
 
                                       55
<PAGE>
extent provided in the applicable Pooling and Servicing Agreement. The Servicing
Fee with respect to the Mortgage  Loans underlying the Certificates of a  Series
will  be specified in the applicable Prospectus Supplement. Additional servicing
compensation in the form  of prepayment charges,  assumption fees, late  payment
charges or otherwise will be retained by the Servicer.
 
    The Servicer will pay all expenses incurred in connection with the servicing
of  the  Mortgage  Loans  underlying a  Series,  including,  without limitation,
payment of  the hazard  insurance  policy premiums  and  fees or  other  amounts
payable  pursuant  to  any  applicable agreement  for  the  provision  of credit
enhancement for  such Series,  payment  of the  fees  and disbursements  of  the
Trustee  and any custodian, fees due to the independent accountants and expenses
incurred in  connection with  distributions and  reports to  Certificateholders.
Certain  of these expenses may  be reimbursable to the  Servicer pursuant to the
terms of the applicable Pooling and Servicing Agreement.
 
    As set forth in  the preceding paragraph, the  Servicer will be entitled  to
reimbursement  for  certain  expenses  incurred by  it  in  connection  with the
liquidation of defaulted Mortgage Loans. In the event that claims are either not
made or are not fully paid from  any applicable form of credit enhancement,  the
related Trust Estate will suffer a loss to the extent that Liquidation Proceeds,
after  reimbursement of the Servicing Fee and  the expenses of the Servicer, are
less than the principal  balance of the related  Mortgage Loan. The Servicer  is
also  entitled  to  reimbursement  from  the  Certificate  Account  of  Periodic
Advances, of advances made  by it to pay  taxes, insurance premiums and  similar
items  with respect to any Mortgaged Property, of expenditures incurred by it in
connection with the restoration of any Mortgaged Property and of certain  losses
against which it is indemnified by the Trust Estate. (Section 3.03).
 
EVIDENCE AS TO COMPLIANCE
 
    The  Servicer will deliver  to the Trustee  annually, on or  before the date
specified in  the  Pooling and  Servicing  Agreement, an  Officer's  Certificate
stating that (i) a review of the activities of the Servicer during the preceding
calendar  year and of performance under  the Pooling and Servicing Agreement has
been made under the supervision  of such officer, and (ii)  to the best of  such
officer's  knowledge, based on  such review, the Servicer  has fulfilled all its
obligations under the Pooling and Servicing Agreement throughout such year,  or,
if  there  has  been  a  default in  the  fulfillment  of  any  such obligation,
specifying each such  default known to  such officer and  the nature and  status
thereof.  Such Officer's  Certificate shall be  accompanied by a  statement of a
firm of independent public accountants  to the effect that,  on the basis of  an
examination  of certain  documents and  records relating  to the  mortgage loans
being serviced by the Servicer,  conducted substantially in compliance with  the
Uniform  Single  Audit  Program  for Mortgage  Bankers,  the  servicing  of such
mortgage loans was conducted  in compliance with the  provisions of the  Pooling
and  Servicing  Agreement  and other  similar  agreements, except  for  (i) such
exceptions as such firm believes to be immaterial and (ii) such other exceptions
as are set forth in such statement. (Sections 3.13, 3.14).
 
CERTAIN MATTERS REGARDING THE SERVICER
 
    The Servicer  may not  resign  from its  obligations  and duties  under  the
Pooling  and  Servicing Agreement  for  each Series  (other  than its  duties as
Certificate Registrar for such Series, if it is acting as such), except upon its
determination that  its  duties  thereunder  are  no  longer  permissible  under
applicable  law or are in material conflict by reason of applicable law with any
other activities of a type and nature carried on by it. No such resignation will
become effective until the Trustee for  such Series or a successor servicer  has
assumed  the Servicer's obligations  and duties under  the Pooling and Servicing
Agreement. (Section 6.04).  If the  Servicer resigns  for any  of the  foregoing
reasons  and the  Trustee is  unable or  unwilling to  assume responsibility for
servicing the Mortgage  Loans, it  may appoint another  institution as  mortgage
loan servicer, as described under "Rights Upon Event of Default" below.
 
    The  Pooling  and Servicing  Agreement will  also  provide that  neither the
Servicer, any subservicer, nor any partner, director, officer, employee or agent
of either  of them  (or of  any  partner of  the Servicer),  will be  under  any
liability  to the Trust Estate or the  Certificateholders, for the taking of any
action or for refraining from the taking of any action in good faith pursuant to
the Pooling  and  Servicing Agreement,  or  for errors  in  judgment;  provided,
however, that neither the Servicer, any subservicer, nor any such person will be
 
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<PAGE>
protected  against any  liability that would  otherwise be imposed  by reason of
willful misfeasance, bad faith or gross negligence in the performance of his  or
its  duties or  by reason of  reckless disregard  of his or  its obligations and
duties thereunder. The Pooling and Servicing Agreement will further provide that
the Servicer, any subservicer, and  any partner, director, officer, employee  or
agent of either of them (or of any partner of the Servicer) shall be entitled to
indemnification  by the Trust Estate and will be held harmless against any loss,
liability or expense incurred  in connection with any  legal action relating  to
the  Pooling and Servicing  Agreement or the Certificates,  other than any loss,
liability or expense  incurred by reason  of willful misfeasance,  bad faith  or
gross negligence in the performance of his or its duties thereunder or by reason
of  reckless  disregard of  his  or its  obligations  and duties  thereunder. In
addition, the Pooling  and Servicing  Agreement will provide  that the  Servicer
will  not be under  any obligation to  appear in, prosecute  or defend any legal
action that is  not incidental  to its duties  under the  Pooling and  Servicing
Agreement  and that in its  opinion may involve it  in any expense or liability.
The Servicer may, however, in its  discretion, undertake any such action  deemed
by it necessary or desirable with respect to the Pooling and Servicing Agreement
and  the  rights and  duties of  the parties  thereto and  the interests  of the
Certificateholders thereunder. In such  event, the legal  expenses and costs  of
such  action and any  liability resulting therefrom will  be expenses, costs and
liabilities of  the  Trust  Estate and  the  Servicer  will be  entitled  to  be
reimbursed  therefor out of the  Certificate Account, and any  loss to the Trust
Estate arising from such right of reimbursement will be allocated pro rata among
the various Classes of Certificates unless otherwise specified in the applicable
Pooling and Servicing Agreement. (Section 6.03).
 
    Any person into  which the Servicer  may be merged  or consolidated, or  any
person  resulting  from any  merger, conversion  or  consolidation to  which the
Servicer is  a party,  or any  person  succeeding to  the business  through  the
transfer  of substantially all of its assets, or otherwise, of the Servicer will
be the successor of the Servicer  under the Pooling and Servicing Agreement  for
each  Series provided  that such successor  or resulting entity  is qualified to
service mortgage loans for FNMA  or FHLMC and has a  net worth of not less  than
$15,000,000.
 
    The Servicer also has the right to assign its rights and delegate its duties
and  obligations  under the  Pooling and  Servicing  Agreement for  each Series;
provided that  (i) the  purchaser  or transferee  accepting such  assignment  or
delegation  is  qualified  to  service  mortgage loans  for  FNMA  or  FHLMC, is
satisfactory to the Trustee for such  Series, in the exercise of its  reasonable
judgment,  and executes and  delivers to the  Trustee an agreement,  in form and
substance reasonably satisfactory to the  Trustee, which contains an  assumption
by  such  purchaser  or  transferee  of the  due  and  punctual  performance and
observance of each  covenant and condition  to be performed  or observed by  the
Servicer  under the Pooling and  Servicing Agreement from and  after the date of
such  agreement;  and  (ii)  each  applicable  Rating  Agency's  rating  of  any
Certificates  for such  Series in effect  immediately prior  to such assignment,
sale or  transfer  is not  reasonably  likely  to be  qualified,  downgraded  or
withdrawn  as a result of such assignment, sale or transfer and the Certificates
are not reasonably  likely to  be placed  on credit  review status  by any  such
Rating  Agency. The  Servicer will  be released  from its  obligations under the
Pooling and Servicing Agreement upon any such assignment and delegation,  except
that  the  Servicer  will  remain liable  for  all  liabilities  and obligations
incurred by it prior to  the time that the  conditions contained in clauses  (i)
and (ii) above are met. (Section 6.02).
 
                      THE POOLING AND SERVICING AGREEMENT
 
EVENTS OF DEFAULT
 
    Events  of Default under the Pooling and Servicing Agreement for each Series
include (i) any failure by the Servicer to distribute to Certificateholders  any
required  payment which  continues unremedied  for 10  days after  the giving of
written notice of such failure to the  Servicer by the Trustee for such  Series,
or to the Servicer and the Trustee by the holders of Certificates of such Series
having  voting  rights  allocated  to  such  Certificates  ("Voting  Interests")
aggregating not  less  than  25%  of  the  Voting  Interests  allocated  to  all
Certificates  for such Series; (ii) any failure  by the Servicer duly to observe
or perform in any material respect
 
                                       57
<PAGE>
any other of its covenants or agreements in the Pooling and Servicing  Agreement
which  continues unremedied for 60 days (or 30  days in the case of a failure to
maintain any pool  insurance policy required  to be maintained  pursuant to  the
Pooling  and Servicing  Agreement) after  the giving  of written  notice of such
failure to the Servicer by  the Trustee, or to the  Servicer and Trustee by  the
holders  of Certificates aggregating not less  than 25% of the Voting Interests;
(iii) certain events in insolvency, readjustment of debt, marshalling of  assets
and  liabilities  or  similar proceedings  and  certain action  by  the Servicer
indicating its insolvency,  reorganization or inability  to pay its  obligations
and  (iv)  both the  Servicer  and any  subservicer  appointed by  it  to become
ineligible to service for both FNMA and FHLMC (unless remedied within 90  days).
(Section 7.01).
 
RIGHTS UPON EVENT OF DEFAULT
 
    So  long as  an Event  of Default remains  unremedied under  the Pooling and
Servicing Agreement for  a Series,  the Trustee for  such Series  or holders  of
Certificates of such Series evidencing not less than 25% of the Voting Interests
in  the  Trust  Estate for  such  Series may  terminate  all of  the  rights and
obligations of the Servicer under the Pooling and Servicing Agreement and in and
to the  Mortgage Loans  (other than  the  Servicer's right  to recovery  of  any
Initial  Deposit for such Series, the aggregate  Servicing Fees due prior to the
date of termination,  and other expenses  and amounts advanced  pursuant to  the
terms  of the  Pooling and Servicing  Agreement, which rights  the Servicer will
retain under all circumstances), whereupon the  Trustee will succeed to all  the
responsibilities,  duties and liabilities of the  Servicer under the Pooling and
Servicing Agreement and will be  entitled to monthly servicing compensation  not
to  exceed  the  aggregate  Servicing Fees  together  with  the  other servicing
compensation in the form of assumption  fees, late payment charges or  otherwise
as  provided  in the  Pooling and  Servicing  Agreement. In  the event  that the
Trustee is unwilling or unable so to act, it may select, pursuant to the  public
bid  procedure described in  the applicable Pooling  and Servicing Agreement, or
petition a  court of  competent  jurisdiction to  appoint,  a housing  and  home
finance  institution, bank or mortgage servicing institution with a net worth of
at least $10,000,000 to act as successor to the Servicer under the provisions of
the Pooling and Servicing  Agreement relating to the  servicing of the  Mortgage
Loans.  In  the  event such  public  bid  procedure is  utilized,  the successor
servicer would be entitled to servicing  compensation in an amount equal to  the
aggregate  Servicing Fees, together with the other servicing compensation in the
form of assumption fees, late payment  charges or otherwise, as provided in  the
Pooling  and Servicing Agreement, and the  Servicer would be entitled to receive
the net profits,  if any, realized  from the  sale of its  servicing rights  and
obligations under the Pooling and Servicing Agreement. (Sections 7.01 and 7.05).
 
    During  the  continuance  of any  Event  of  Default under  the  Pooling and
Servicing Agreement for  a Series,  the Trustee for  such Series  will have  the
right  to take  action to  enforce its  rights and  remedies and  to protect and
enforce the rights and  remedies of the Certificateholders  of such Series,  and
holders of Certificates evidencing not less than 25% of the Voting Interests for
such  Series may direct the time, method  and place of conducting any proceeding
for any  remedy  available to  the  Trustee or  exercising  any trust  or  power
conferred  upon  the  Trustee.  However,  the  Trustee  will  not  be  under any
obligation to pursue any such remedy or to exercise any of such trusts or powers
unless such Certificateholders have offered  the Trustee reasonable security  or
indemnity  against the cost,  expenses and liabilities which  may be incurred by
the Trustee thereby. Also, the Trustee may decline to follow any such  direction
if  the Trustee  determines that  the action or  proceeding so  directed may not
lawfully be  taken or  would involve  it in  personal liability  or be  unjustly
prejudicial to the non-assenting Certificateholders. (Sections 7.02 and 7.03).
 
    No  Certificateholder of a Series, solely  by virtue of such holder's status
as a Certificateholder,  will have  any right  under the  Pooling and  Servicing
Agreement  for  such Series  to  institute any  proceeding  with respect  to the
Pooling and Servicing Agreement, unless such holder previously has given to  the
Trustee  for such  Series written  notice of default  and unless  the holders of
Certificates evidencing  not less  than 25%  of the  Voting Interests  for  such
Series  have made written request upon  the Trustee to institute such proceeding
in its own name as Trustee thereunder and have offered to the Trustee reasonable
indemnity and the Trustee for 60 days has neglected or refused to institute  any
such proceeding. (Section 10.03).
 
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<PAGE>
AMENDMENT
 
    Each  Pooling  and Servicing  Agreement may  be amended  by the  Seller, the
Servicer and the Trustee without the  consent of the Certificateholders, (i)  to
cure any ambiguity, (ii) to correct or supplement any provision therein that may
be  inconsistent with any other provision therein, (iii) to modify, eliminate or
add to any of its  provisions to such extent as  shall be necessary to  maintain
the  qualification of the Trust Estate (or  a segregated pool of assets therein)
as a REMIC at  all times that  any Certificates are outstanding  or to avoid  or
minimize  the risk of the imposition of any  tax on the Trust Estate pursuant to
the Code that  would be  a claim  against the  Trust Estate,  provided that  the
Trustee  has received an  opinion of counsel  to the effect  that such action is
necessary or desirable to  maintain such qualification or  to avoid or  minimize
the  risk  of the  imposition  of any  such  tax and  such  action will  not, as
evidenced by such opinion of counsel,  adversely affect in any material  respect
the  interests of any Certificateholder, (iv) to change the timing and/or nature
of deposits into the Certificate Account, provided that such change will not, as
evidenced by an opinion of counsel, adversely affect in any material respect the
interests of  any Certificateholder  and  that such  change will  not  adversely
affect  the then current rating assigned to  any Certificates, as evidenced by a
letter from  each  Rating Agency  to  such effect,  (v)  to add  to,  modify  or
eliminate  any provisions therein restricting transfers of residual Certificates
to certain  disqualified organizations  described below  under "Certain  Federal
Income   Tax   Consequences--Federal   Income   Tax   Consequences   for   REMIC
Certificates--Taxation of  Residual  Certificates--Tax-Related  Restrictions  on
Transfer  of Residual Certificates,"  or (vi) to make  any other provisions with
respect to  matters  or  questions  arising under  such  Pooling  and  Servicing
Agreement  that are not inconsistent with  the provisions thereof, provided that
such action will not, as evidenced by an opinion of counsel, adversely affect in
any material  respect the  interests of  the Certificateholders  of the  related
Series.  The Pooling and Servicing Agreement may  also be amended by the Seller,
the Servicer and  the Trustee with  the consent of  the holders of  Certificates
evidencing  interests aggregating not less than  66 2/3% of the Voting Interests
evidenced by the Certificates  of each Class or  Subclass affected thereby,  for
the purpose of adding any provisions to or changing in any manner or eliminating
any of the provisions of such Pooling and Servicing Agreement or of modifying in
any manner the rights of the Certificateholders; provided, however, that no such
amendment  may (i) reduce in  any manner the amount of,  or delay the timing of,
any payments received on or with respect to Mortgage Loans that are required  to
be  distributed on any Certificates,  without the consent of  the holder of such
Certificate, (ii) adversely affect in any material respect the interests of  the
holders  of a Class  or Subclass of Certificates  of a Series  in a manner other
than that  set  forth  in (i)  above  without  the consent  of  the  holders  of
Certificates aggregating not less than 66 2/3% of the Voting Interests evidenced
by  such  Class  or  Subclass,  or  (iii)  reduce  the  aforesaid  percentage of
Certificates of any  Class or  Subclass, the holders  of which  are required  to
consent   to  such  amendment,  without  the  consent  of  the  holders  of  all
Certificates  of   such   Class   or   Subclass   affected   then   outstanding.
Notwithstanding  the  foregoing,  the  Trustee  will  not  consent  to  any such
amendment if such amendment would subject the Trust Estate (or a segregated pool
of assets therein)  to tax  or cause  the Trust  Estate (or  segregated pool  of
assets therein) to fail to qualify as a REMIC.
 
TERMINATION; PURCHASE OF MORTGAGE LOANS
 
    The  obligations created by the Pooling and Servicing Agreement for a Series
of Certificates  will terminate  on the  Distribution Date  following the  final
payment  or other liquidation of the last  Mortgage Loan subject thereto and the
disposition of all property acquired upon foreclosure of any such Mortgage Loan.
In no  event, however,  will the  trust  created by  the Pooling  and  Servicing
Agreement  continue beyond the expiration of 21 years from the death of the last
survivor of certain persons named in  such Pooling and Servicing Agreement.  For
each Series of Certificates, the Trustee will give written notice of termination
of  the Pooling and Servicing Agreement to each Certificateholder, and the final
distribution  will  be  made  only  upon  surrender  and  cancellation  of   the
Certificates at an office or agency appointed by the Seller and specified in the
notice of termination.
 
    If  so  provided  in  the related  Prospectus  Supplement,  the  Pooling and
Servicing Agreement  for  each  Series  of Certificates  will  permit,  but  not
require,    the    person   or    persons    specified   in    such   Prospectus
 
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Supplement to  purchase from  the Trust  Estate for  such Series  all  remaining
Mortgage  Loans at the time subject to  the Pooling and Servicing Agreement at a
price specified in such  Prospectus Supplement. In the  event that the  Servicer
has  caused the related Trust Estate (or a segregated pool of assets therein) to
be treated as a  REMIC, any such  purchase will be effected  only pursuant to  a
"qualified liquidation" as defined in Code Section 860F(a)(4)(A) and the receipt
by  the Trustee of an opinion of counsel  that such purchase will not (i) result
in the  imposition of  a tax  on "prohibited  transactions" under  Code  Section
860F(a)(1),  (ii) otherwise subject the  REMIC to tax, or  (iii) cause the Trust
Estate (or a  segregated pool  of assets)  to fail to  qualify as  a REMIC.  The
exercise  of such right will effect early retirement of the Certificates of that
Series, but the right so to purchase  may be exercised only after the  aggregate
principal  balance of the Mortgage Loans for such Series at the time of purchase
is less than a  specified percentage of the  aggregate principal balance at  the
Cut-Off  Date  for  the Series,  or  after the  date  set forth  in  the related
Prospectus Supplement.
 
THE TRUSTEE
 
    The Trustee under each Pooling and Servicing Agreement (the "Trustee")  will
be  named in the applicable Prospectus  Supplement. The commercial bank or trust
company serving as Trustee may have normal banking relationships with the Seller
or any of its affiliates.
 
    The Trustee may  resign at any  time, in  which event the  Servicer will  be
obligated  to  appoint a  successor trustee.  The Servicer  may also  remove the
Trustee if the Trustee ceases to be eligible to act as Trustee under the Pooling
and Servicing Agreement, if the Trustee becomes insolvent or in order to  change
the situs of the Trust Estate for state tax reasons. Upon becoming aware of such
circumstances,  the  Servicer  will  become  obligated  to  appoint  a successor
trustee. The  Trustee  may  also be  removed  at  any time  by  the  holders  of
Certificates  evidencing not less than 51% of  the Voting Interests in the Trust
Estate, except that, any Certificate registered  in the name of the Seller,  the
Servicer  or any affiliate thereof will not be taken into account in determining
whether the requisite Voting  Interest in the Trust  Estate necessary to  effect
any  such removal has been obtained. Any resignation and removal of the Trustee,
and the appointment  of a  successor trustee,  will not  become effective  until
acceptance  of such appointment  by the successor trustee.  The Trustee, and any
successor trustee,  will  have  a  combined capital  and  surplus  of  at  least
$50,000,000,  or  will be  a  member of  a  bank holding  system,  the aggregate
combined capital and surplus of which is at least $50,000,000, provided that the
Trustee's and any such successor trustee's separate capital and surplus shall at
all times be at  least the amount  specified in Section  310(a)(2) of the  Trust
Indenture  Act of  1939, and  will be subject  to supervision  or examination by
federal or state authorities.
 
                  CERTAIN LEGAL ASPECTS OF THE MORTGAGE LOANS
 
    The following  discussion contains  summaries of  certain legal  aspects  of
mortgage  loans  which are  general in  nature. Because  such legal  aspects are
governed by  applicable state  law (which  laws may  differ substantially),  the
summaries do not purport to be complete or to reflect the laws of any particular
state,  nor to encompass  the laws of all  states in which  the security for the
Mortgage Loans is  situated. The summaries  are qualified in  their entirety  by
reference to the applicable federal and state laws governing the Mortgage Loans.
 
GENERAL
 
    The Mortgage Loans will, in general, be secured by either first mortgages or
first  deeds of trust,  depending upon the  prevailing practice in  the state in
which the underlying  property is located.  A mortgage creates  a lien upon  the
real  property described in the  mortgage. There are two  parties to a mortgage:
the mortgagor, who is the borrower; and  the mortgagee, who is the lender. In  a
mortgage  state instrument,  the mortgagor delivers  to the mortgagee  a note or
bond evidencing the loan and the mortgage.  Although a deed of trust is  similar
to  a mortgage, a deed of trust has three parties: a borrower called the trustor
(similar to  a  mortgagor),  a  lender called  the  beneficiary  (similar  to  a
mortgagee), 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  loan.
The trustee's authority under a
 
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deed of trust and the mortgagee's authority under a mortgage are governed by the
express  provisions of the  deed of trust  or mortgage, applicable  law, and, in
some  cases,  with  respect  to  the  deed  of  trust,  the  directions  of  the
beneficiary.
 
FORECLOSURE
 
    Foreclosure  of  a mortgage  is generally  accomplished by  judicial action.
Generally, the action is  initiated by the service  of legal pleadings upon  all
parties  having an interest of record in the real property. Delays in completion
of the  foreclosure  occasionally  may  result  from  difficulties  in  locating
necessary  parties  defendant.  When  the mortgagee's  right  of  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 may  issue a  judgment of  foreclosure  and appoint  a receiver  or  other
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.  Foreclosure of a mortgage by  advertisement is essentially similar to
foreclosure of a deed of trust by non-judicial power of sale.
 
    Foreclosure of a deed of trust  is generally accomplished by a  non-judicial
trustee's  sale under a specific provision in  the deed of trust that authorizes
the trustee  to sell  the property  to a  third party  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 some states,  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  a notice of  default and notice  of sale. In
addition, the trustee must provide notice in some states to any other individual
having an  interest  of  record  in the  real  property,  including  any  junior
lienholders.  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,
published for a specified 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 property.
 
    In some states, 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  reinstatement period,  cure the  default by  paying the
entire amount in arrears plus the  costs and expenses incurred in enforcing  the
obligation.  Certain state laws  control the amount  of foreclosure expenses and
costs, including attorneys' fees, which may be recovered by a lender.
 
    In case of foreclosure under either a mortgage or a deed of trust, the  sale
by  the receiver  or other designated  officer, or  by the trustee,  is a public
sale. However, because  of the difficulty  a potential buyer  at the sale  would
have in determining the exact status of title and because the physical condition
of  the property may have deteriorated during the foreclosure proceedings, it is
uncommon for a  third party to  purchase the property  at the foreclosure  sale.
Rather, it is common for the lender to purchase the property from the trustee or
receiver for an amount equal to the unpaid principal amount of the note, accrued
and  unpaid interest and the expenses of foreclosure. Thereafter, subject to the
right of  the  borrower  in some  states  to  remain in  possession  during  the
redemption  period, the lender  will assume the  burdens 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 commonly will
obtain the services of a real estate  broker and pay the broker a 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. Any loss may  be reduced by the receipt of mortgage
insurance proceeds, if any, or by  judicial action against the borrower for  the
deficiency,   if  such  action  is  permitted  by  law.  See  "--Anti-Deficiency
Legislation and Other Limitations on Lenders" below.
 
FORECLOSURE ON SHARES OF COOPERATIVES
 
    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 By-laws, as well  as
in  the proprietary lease  or occupancy agreement,  and may be  cancelled by the
cooperative
 
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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 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  a 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  by the  agreement  in any  rights it  may  have to  dispossess the
tenant-stockholders.
 
    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 corporation 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.
 
RIGHTS OF REDEMPTION
 
    In some states, after sale pursuant to a deed of trust and/or foreclosure of
a mortgage,  the borrower  and certain  foreclosed junior  lienors are  given  a
statutory  period in which to redeem the  property from the foreclosure sale. In
most states where the right of redemption is available, statutory redemption may
occur upon  payment of  the  foreclosure 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 delay  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 maintain  the property  and pay the  expenses of  ownership until the
redemption period has run.
 
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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, 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 net amount realized upon the foreclosure sale.
 
    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.
 
    Other  statutory provisions  may 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 such sale. The
purpose of  these statutes  is 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  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.
 
    Generally, Article 9 of  the UCC governs  foreclosure on cooperative  shares
and  the related proprietary lease or occupancy agreement and foreclosure on the
beneficial interest in a land trust. 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  Mortgage Loan secured  by
shares  of a cooperative, would be such shares and the related proprietary lease
or occupancy agreement) was conducted in a commercially reasonable manner.
 
    The Servicer is not  required under the Pooling  and Servicing Agreement  to
pursue deficiency judgments on the Mortgage Loans even if permitted by law.
 
    In  addition  to  anti-deficiency and  related  legislation,  numerous other
federal and state  statutory provisions, including  the federal bankruptcy  laws
and  state laws affording  relief to debtors,  may interfere with  or affect the
ability of a secured mortgage lender to realize upon its security. For  example,
in  a Chapter  13 proceeding  under the  federal Bankruptcy  Code, when  a court
determines that the value of  a home is less than  the principal balance of  the
loan,  the court may prevent a lender from foreclosing on the home, and, as part
of the rehabilitation plan, reduce the amount of the secured indebtedness to the
value of the home as it exists at the time of the proceeding, leaving the lender
as a general unsecured  creditor for the difference  between that value and  the
amount  of outstanding indebtedness.  A bankruptcy court may  grant the debtor a
reasonable time to cure a  payment default, and in the  case of a mortgage  loan
not  secured by  the debtor's principal  residence, also may  reduce the monthly
payments due under such mortgage loan,  change the rate of interest, reduce  the
principal balance of the loan to the then-current appraised value of the related
Mortgaged Property and alter the mortgage loan repayment schedule. Certain court
decisions  have applied such relief to  claims secured by the debtor's principal
residence. If  a  court  relieves  a  borrower's  obligation  to  repay  amounts
otherwise  due on a Mortgage Loan, the  Servicer will not be required to advance
such  amounts,  and  any  loss  in   respect  thereof  will  be  borne  by   the
Certificateholders.
 
    The  Internal Revenue Code of 1986, as amended, provides priority to certain
tax liens over  the lien  of the mortgage  or deed  of trust. The  laws of  some
states  provide priority to certain  tax liens over the  lien of the mortgage or
deed of trust. Numerous federal and  some 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,
 
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Equal  Credit Opportunity  Act, Fair Credit  Billing Act,  Fair Credit Reporting
Act, and related  statutes and regulations.  These federal laws  and state  laws
impose  specific  statutory liabilities  upon lenders  who originate  or service
mortgage loans and who fail  to comply with the provisions  of the law. In  some
cases, this liability may affect assignees of the mortgage loans.
 
SOLDIERS' AND SAILORS' CIVIL RELIEF ACT AND SIMILAR LAWS
 
    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  action  could  have  an  effect,  for  an
indeterminate period of  time, on the  ability of the  Servicer to collect  full
amounts  of interest  on certain of  the Mortgage  Loans in a  Trust Estate. Any
shortfall in interest collections resulting  from the application of the  Relief
Act  could result in  losses to the  holders of the  Certificates of the related
Series. Further,  the Relief  Act  imposes limitations  which would  impair  the
ability  of the Servicer  to foreclose on  an affected Mortgage  Loan during the
borrower's period of active duty status. Thus, in the event that such a Mortgage
Loan goes  into  default, there  may  be delays  and  losses occasioned  by  the
inability  to realize upon  the Mortgaged Property in  a timely fashion. Certain
states have enacted comparable  legislation which may  interfere with or  affect
the ability of the Servicer to timely collect payments of principal and interest
on,  or to  foreclose on,  Mortgage Loans  of borrowers  in such  states who are
active or reserve members of the armed services.
 
ENVIRONMENTAL CONSIDERATIONS
    Under the  federal  Comprehensive Environmental  Response  Compensation  and
Liability  Act, as  amended, and  under state law  in certain  states, a secured
party which takes a deed in lieu of foreclosure, purchases a mortgaged  property
at  a foreclosure  sale or  operates a mortgaged  property may  become liable in
certain circumstances  for the  costs of  remedial action  ("Cleanup Costs")  if
hazardous  wastes or hazardous  substances have been released  or disposed of on
the property. Such Cleanup  Costs may be substantial.  It is possible that  such
Cleanup  Costs  could become  a liability  of  the Trust  Estate and  reduce the
amounts  otherwise  distributable  to  the  Certificateholders  if  a  Mortgaged
Property  securing a Mortgage  Loan became the  property of the  Trust Estate in
certain circumstances and if such Cleanup Costs were incurred. Moreover, certain
states by statute impose a lien for any Cleanup Costs incurred by such state  on
the  property that  is the  subject of such  Cleanup Costs  (a "Superlien"). All
subsequent liens on  such property are  subordinated to such  Superlien and,  in
some  states, even prior recorded liens  are subordinated to such Superliens. In
the latter states, the security  interest of the Trustee  in a property that  is
subject to such a Superlien could be adversely affected.
 
    Traditionally, residential mortgage lenders have not taken steps to evaluate
whether hazardous wastes or hazardous substances are present with respect to any
mortgaged  property prior to  the origination of  the mortgage loan  or prior to
foreclosure or accepting a deed-in-lieu of foreclosure. Accordingly, neither the
Seller nor  PHMC has  made such  evaluations  prior to  the origination  of  the
Mortgage  Loans,  nor  does either  require  that  such evaluations  be  made by
originators who have  sold the Mortgage  Loans to PHMC.  Neither the Seller  nor
PHMC  is  required to  undertake any  such evaluations  prior to  foreclosure or
accepting a deed-in-lieu of  foreclosure. Neither the  Seller, the Servicer  nor
PHMC  makes  any representations  or warranties  or  assumes any  liability with
respect to the absence or effect of hazardous wastes or hazardous substances  on
any  Mortgaged Property or any casualty resulting from the presence or effect of
hazardous wastes  or  hazardous  substances. See  "The  Trust  Estates--Mortgage
Loans--Representations   and   Warranties"  and   "Servicing  of   the  Mortgage
Loans--Enforcement of Due-on-Sale Clauses;  Realization Upon Defaulted  Mortgage
Loans" above.
 
"DUE-ON-SALE" CLAUSES
    The  forms  of note,  mortgage and  deed of  trust relating  to conventional
Mortgage Loans may contain a "due-on-sale" clause permitting acceleration of the
maturity  of  a   loan  if   the  borrower   transfers  its   interest  in   the
 
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property.  In  recent  years,  court decisions  and  legislative  actions placed
substantial restrictions on the right of lenders to enforce such clauses in many
states. However,  effective  October  15, 1982,  Congress  enacted  the  Garn-St
Germain  Depository Institutions Act of 1982  (the "Garn Act") which purports to
preempt state laws which  prohibit the enforcement  of "due-on-sale" clauses  by
providing  among  other matters,  that  "due-on-sale" clauses  in  certain loans
(which loans may include  the Mortgage Loans) made  after the effective date  of
the  Garn Act are  enforceable, within certain  limitations as set  forth in the
Garn Act  and  the  regulations promulgated  thereunder.  "Due-on-sale"  clauses
contained  in mortgage loans originated by federal savings and loan associations
or federal savings banks  are fully enforceable pursuant  to regulations of  the
Office of Thrift Supervision ("OTS"), as successor to the Federal Home Loan Bank
Board ("FHLBB"), which preempt state law restrictions on the enforcement of such
clauses.  Similarly, "due-on-sale"  clauses in  mortgage loans  made by national
banks and federal credit unions are now fully enforceable pursuant to preemptive
regulations of the  Comptroller of the  Currency and the  National Credit  Union
Administration, respectively.
 
    The  Garn  Act  created  a  limited  exemption  from  its  general  rule  of
enforceability for  "due-on-sale" clauses  in  certain mortgage  loans  ("Window
Period  Loans") which were originated by non-federal lenders and made or assumed
in certain states ("Window Period States")  during the period, prior to  October
15,  1982,  in  which that  state  prohibited the  enforcement  of "due-on-sale"
clauses by constitutional  provision, statute or  statewide court decision  (the
"Window  Period"). Though neither the Garn  Act nor the OTS regulations actually
names the Window Period States, the  Federal Home Loan Mortgage Corporation  has
taken  the  position,  in  prescribing mortgage  loan  servicing  standards with
respect to mortgage loans which it has purchased, that the Window Period  States
were:   Arizona,  Arkansas,  California,   Colorado,  Georgia,  Iowa,  Michigan,
Minnesota, New Mexico, Utah and Washington. Under the Garn Act, unless a  Window
Period  State took action by October 15, 1985,  the end of the Window Period, to
further regulate enforcement  of "due-on-sale" clauses  in Window Period  Loans,
"due-on-sale" clauses would become enforceable even in Window Period Loans. Five
of  the Window Period States (Arizona, Minnesota, Michigan, New Mexico and Utah)
have taken actions which restrict the enforceability of "due-on-sale" clauses in
Window Period Loans beyond October 15,  1985. The actions taken vary among  such
states.
 
    By  virtue  of the  Garn Act,  the  Servicer may  generally be  permitted to
accelerate any conventional Mortgage Loan which contains a "due-on-sale"  clause
upon  transfer of an interest in the property subject to the mortgage or deed of
trust. With respect to any Mortgage Loan  secured by a residence occupied or  to
be  occupied  by the  borrower, this  ability  to accelerate  will not  apply to
certain types of transfers, including (i)  the granting of a leasehold  interest
which  has a term of three years or less and which does not contain an option to
purchase, (ii) a transfer to a relative resulting from the death of a  borrower,
or  a transfer where the  spouse or children become an  owner of the property in
each case where  the transferee(s) will  occupy the property,  (iii) a  transfer
resulting  from a decree of dissolution  of marriage, legal separation agreement
or from an incidental property settlement agreement by which the spouse  becomes
an  owner of  the property,  (iv) the  creation of  a lien  or other encumbrance
subordinate to  the lender's  security instrument  which does  not relate  to  a
transfer  of rights  of occupancy  in the property  (provided that  such lien or
encumbrance is not created pursuant to a  contract for deed), (v) a transfer  by
devise,  descent or operation of law on the death of a joint tenant or tenant by
the entirety, and  (vi) other transfers  as set forth  in the Garn  Act and  the
regulations  thereunder. The extent of the effect of the Garn Act on the average
lives and  delinquency rates  of the  Mortgage Loans  cannot be  predicted.  See
"Prepayment and Yield Considerations."
 
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 OTS as successor to  the
FHLBB   is  authorized   to  issue   rules  and   regulations  and   to  publish
interpretations governing implementation of Title V. The statute authorized  any
state  to reimpose interest rate limits by  adopting before April 1, 1983, a law
or constitutional provision which expressly  rejects application of the  federal
law.  Fifteen  states have  adopted laws  reimposing or  reserving the  right to
reimpose interest  rate  limits. In  addition,  even where  Title  V is  not  so
rejected,  any state is  authorized to adopt a  provision limiting certain other
loan charges.
 
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    The Seller will represent and warrant in the Pooling and Servicing Agreement
to the Trustee for the benefit of Certificateholders that all Mortgage Loans are
originated  in full compliance with applicable state laws, including usury laws.
See "The Pooling and  Servicing Agreement--Assignment of  Mortgage Loans to  the
Trustee."
 
ENFORCEABILITY OF CERTAIN PROVISIONS
 
    Standard  forms  of  note,  mortgage and  deed  of  trust  generally 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 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 the Pooling and Servicing Agreement, late charges and prepayment
fees (to the extent  permitted by law  and not waived by  the Servicer) will  be
retained by the Servicer as additional servicing compensation.
 
    Courts  have imposed  general equitable  principles upon  foreclosure. These
equitable principles are  generally designed  to relieve the  borrower from  the
legal effect of defaults under the loan documents. Examples of judicial remedies
that  may be fashioned  include judicial requirements  that the lender undertake
affirmative and expensive  actions to  determine the causes  for the  borrower's
default and the likelihood that the borrower will be able to reinstate the loan.
In  some cases, courts have substituted their judgment for the lender's judgment
and have required  lenders to  reinstate loans  or recast  payment schedules  to
accommodate  borrowers who are suffering from temporary financial disability. In
some cases, courts have limited the right of lenders to foreclose if the default
under the mortgage instrument is not  monetary, such as the borrower failing  to
adequately  maintain the property or the borrower executing a second mortgage or
deed of trust  affecting the  property. In other  cases, some  courts have  been
faced  with  the  issue  whether  federal  or  state  constitutional  provisions
reflecting due process concerns for adequate notice require that borrowers under
the deeds of  trust receive  notices in addition  to the  statutorily-prescribed
minimum  requirements. 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  or under  a mortgage  having a  power of  sale does  not involve
sufficient state action to afford constitutional protections to the borrower.
 
                    CERTAIN FEDERAL INCOME TAX CONSEQUENCES
 
    The following is a  general discussion of  the anticipated material  federal
income   tax  consequences  of  the  purchase,  ownership,  and  disposition  of
Certificates, which may consist of REMIC Certificates, Standard Certificates  or
Stripped Certificates, as described below. The discussion below does not purport
to  address  all  federal income  tax  consequences  that may  be  applicable to
particular categories of  investors, some  of which  may be  subject to  special
rules.  The authorities on which this discussion  is based are subject to change
or differing interpretations, and any such change or interpretation could  apply
retroactively.  This discussion reflects the enactment  of the Tax Reform Act of
1986 (the "1986 Act")  and the Technical and  Miscellaneous Revenue Act of  1988
("TAMRA"),  as well as  proposed regulations (the  "Proposed REMIC Regulations")
promulgated by  the U.S.  Department  of the  Treasury  on September  27,  1991.
Investors  should be  aware that the  Proposed REMIC Regulations  are subject to
change and  are  not binding  authority  until  adopted as  final  or  temporary
regulations.  However, to the extent adopted  as currently drafted, the Proposed
REMIC Regulations may apply to  the REMIC Certificates retroactively as  binding
authority.  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 Certificates, particularly with respect to federal
income  tax  changes effected  by the  1986  Act, TAMRA  and the  Proposed REMIC
Regulations.
 
    For purposes of this discussion, where the applicable Prospectus  Supplement
provides  for a  Fixed Retained Yield  with respect  to the Mortgage  Loans of a
Series of Certificates, references to the Mortgage Loans will be deemed to refer
to that portion of the  Mortgage Loans held by the  Trust Estate which does  not
include the Fixed Retained Yield.
 
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<PAGE>
             FEDERAL INCOME TAX CONSEQUENCES FOR REMIC CERTIFICATES
 
GENERAL
 
    With respect to a particular Series of Certificates, an election may be made
to  treat the Trust Estate or one or  more segregated pools of assets therein as
one or more REMICs within the meaning of Code Section 860D. A Trust Estate or  a
portion or portions thereof as to which one or more REMIC elections will be made
will  be  referred  to as  a  "REMIC  Pool." For  purposes  of  this discussion,
Certificates of a Series as to which one or more REMIC elections are made, which
will include all Multi-Class Certificates and may include Standard  Certificates
or  Stripped Certificates or  both, are referred to  as "REMIC Certificates" and
will consist of one or more Classes  of "Regular Certificates" and one Class  of
"Residual Certificates" in the case of each REMIC Pool. Qualification as a REMIC
requires ongoing compliance with certain conditions. With respect to each Series
of REMIC Certificates, Cadwalader, Wickersham & Taft, counsel to the Seller, has
advised  the Seller that  in the firm's  opinion, assuming (i)  the making of an
appropriate election, (ii) compliance with the Pooling and Servicing  Agreement,
and  (iii) compliance with any  changes in the law,  including any amendments to
the Code or  applicable Treasury  regulations thereunder, each  REMIC Pool  will
qualify as a REMIC. In such case, the Regular Certificates will be considered to
be  "regular interests"  in the  REMIC Pool  and generally  will be  treated for
federal income tax purposes as if  they were newly originated debt  instruments,
and  the Residual Certificates will be  considered to be "residual interests" in
the REMIC Pool. The Prospectus Supplement  for each Series of Certificates  will
indicate  whether one or more REMIC elections  with respect to the related Trust
Estate will be made, in which event references to "REMIC" or "REMIC Pool" herein
shall be deemed to refer to each such REMIC Pool.
 
STATUS OF REMIC CERTIFICATES
 
    REMIC Certificates held by a mutual savings bank or a domestic building  and
loan  association will  constitute "qualifying  real property  loans" within the
meaning of Code Section 593(d)(1) in the same proportion that the assets of  the
REMIC  Pool would be so treated. REMIC  Certificates held by a domestic building
and loan association will constitute "a regular or residual interest in a REMIC"
within the meaning  of Code  Section 7701(a)(19)(C)(xi) in  the same  proportion
that  the assets of  the REMIC Pool  would be treated  as "loans...secured by an
interest in real property" within the meaning of Code Section  7701(a)(19)(C)(v)
or  as other assets described in Code Section 7701(a)(19)(C). REMIC Certificates
held by a  real estate  investment trust  will constitute  "real estate  assets"
within  the  meaning of  Code Section  856(c)(5)(A), and  interest on  the REMIC
Certificates will be considered "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) in the same proportion that, for both purposes, the assets
of the REMIC Pool would be so treated. If at all times 95% or more of the assets
of the  REMIC Pool  qualify for  each  of the  foregoing treatments,  the  REMIC
Certificates  will qualify for  the corresponding status  in their entirety. The
Proposed REMIC Regulations provide that, for purposes of Code Sections 593(d)(1)
and 856(c)(5)(A), payments of principal and interest on the Mortgage Loans  that
are reinvested pending distribution to holders of REMIC Certificates qualify for
such treatment. Where two REMIC Pools are a part of a tiered structure they will
be  treated as one  REMIC for purposes  of the tests  described above respecting
asset ownership of  more or less  than 95%. In  addition, if the  assets of  the
REMIC  include Buy-Down Loans, it is possible that the percentage of such assets
constituting "qualifying real property loans" or "loans...secured by an interest
in real property" for purposes of Code Sections 593(d)(1) and 7701(a)(19)(C)(v),
respectively, may  be  required to  be  reduced by  the  amount of  the  related
Buy-Down  Funds. REMIC Certificates held by  a regulated investment company will
not constitute  "Government  securities"  within the  meaning  of  Code  Section
851(b)(4)(A)(i).  REMIC Certificates held by certain financial institutions will
constitute an  "evidence of  indebtedness" within  the meaning  of Code  Section
582(c)(1).
 
QUALIFICATION AS A REMIC
 
    In  order for the  REMIC Pool to qualify  as a REMIC,  there must be ongoing
compliance on the part of the REMIC Pool with the requirements set forth in  the
Code.  The REMIC Pool  must fulfill an  asset test, which  requires that no more
than a DE MINIMIS portion of  the assets of the REMIC  Pool, as of the close  of
the  third calendar month beginning after  the "Startup Day" (which for purposes
of this discussion is the date of
 
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<PAGE>
issuance of the REMIC Certificates) and at all times thereafter, may consist  of
assets  other  than  "qualified  mortgages"  and  "permitted  investments."  The
Proposed REMIC Regulations provide that the DE MINIMIS requirement is met if  at
all  times the aggregate adjusted basis of  the nonqualified assets is less than
1% of the aggregate  adjusted basis of  all the REMIC  Pool's assets. An  entity
that fails to meet the safe harbor may nevertheless demonstrate that it holds no
more than a DE MINIMIS amount of nonqualified assets.
 
    A  qualified mortgage  is any obligation  that is principally  secured by an
interest in real property and  that is either transferred  to the REMIC Pool  on
the  Startup Day or is  purchased by the REMIC  Pool within a three-month period
thereafter pursuant to  a fixed  price contract in  effect on  the Startup  Day.
Qualified  mortgages include whole  mortgage loans, such  as the Mortgage Loans,
and, generally,  certificates of  beneficial interest  in a  grantor trust  that
holds  mortgage  loans  and  regular interests  in  another  REMIC.  A qualified
mortgage includes a qualified replacement  mortgage, which is any property  that
would  have been treated as  a qualified mortgage if  it were transferred to the
REMIC Pool on the Startup  Day and that is received  either (i) in exchange  for
any  qualified  mortgage  within  a three-month  period  thereafter  or  (ii) in
exchange for a  "defective obligation"  within a two-year  period thereafter.  A
"defective obligation" includes (i) a mortgage in default or as to which default
is   reasonably  foreseeable,   (ii)  a  mortgage   as  to   which  a  customary
representation or warranty made at  the time of transfer  to the REMIC Pool  has
been breached, (iii) a mortgage that was fraudulently procured by the mortgagor,
and  (iv) a mortgage that  was not in fact  principally secured by real property
(but only  if such  mortgage is  disposed of  within 90  days of  discovery).  A
Mortgage  Loan that is "defective" as described  in clause (iv) that is not sold
or, if  within  two years  of  the Startup  Day,  exchanged within  90  days  of
discovery, ceases to be a qualified mortgage after such 90-day period.
 
    Permitted  investments  include  cash  flow  investments,  qualified reserve
assets, and foreclosure  property. A cash  flow investment is  an investment  of
amounts  received  on or  with respect  to qualified  mortgages for  a temporary
period, not  exceeding  13 months,  until  the next  scheduled  distribution  to
holders  of interests in the REMIC Pool,  and such investment must earn a return
in the nature of interest. A qualified reserve asset is any intangible  property
held  for investment that is part  of any reasonably required reserve maintained
by the REMIC Pool to  provide for payments of expenses  of the REMIC Pool or  to
provide  additional  security  for  payments  due  on  the  regular  or residual
interests that otherwise  may be delayed  or defaulted upon  because of  default
(including  delinquencies)  on the  qualified mortgages  or lower  than expected
reinvestment returns. It is  currently unclear whether  reserve funds for  other
purposes (such as a reserve fund in connection with the use of graduated payment
mortgages)  constitute  qualified  reserve  assets.  The  reserve  fund  will be
disqualified if more than 30% of the  gross income from the assets in such  fund
for  the year is derived from the sale or other disposition of property held for
less than three  months, unless  required to prevent  a default  on the  regular
interests caused by a default on one or more qualified mortgages. A reserve fund
must  be reduced "promptly and appropriately"  as payments on the Mortgage Loans
are received. Foreclosure property is real  property acquired by the REMIC  Pool
in  connection with the default or imminent  default of a qualified mortgage and
generally held for not more than two years, with possible extensions.
 
    In addition to the foregoing requirements, the various interests in a  REMIC
Pool  also must meet certain requirements. All  of the interests in a REMIC Pool
must be either of the following: (i) one or more classes of regular interests or
(ii) a single class  of residual interests on  which distributions, if any,  are
made  pro rata. A regular interest is an interest in a REMIC Pool that is issued
on the Startup Day with  fixed terms, is designated  as a regular interest,  and
unconditionally  entitles the holder to receive a specified principal amount (or
other similar amount),  and provides  that interest payments  (or other  similar
amounts), if any, at or before maturity either are payable based on a fixed rate
or  a qualified variable rate, or consist  of a specified, nonvarying portion of
the  interest  payments  on  qualified  mortgages.  Under  the  Proposed   REMIC
Regulations,  the specified principal amount of a regular interest that provides
for interest payments consisting of a specified, nonvarying portion of  interest
payments  on qualified mortgages may be zero. A residual interest is an interest
in a REMIC Pool other than a regular interest that is issued on the Startup  Day
and  that is designated  as a residual interest.  The Proposed REMIC Regulations
provide that an interest in  a REMIC Pool may be  treated as a regular  interest
even  if payments of principal with respect to such interest are subordinated to
payments on other regular interests or the residual interest in the REMIC  Pool,
and are
 
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dependent  on the absence of defaults or delinquencies on qualified mortgages or
permitted investments,  lower  than  reasonably expected  returns  on  permitted
investments,  expenses  incurred  by  the  REMIC  Pool  or  prepayment  interest
shortfalls. Accordingly, the  Regular Certificates of  a Series will  constitute
one  or more  classes of regular  interests, and the  Residual Certificates with
respect to that Series will constitute  a single class of residual interests  on
which distributions are made pro rata.
 
    If  an entity, such as the  REMIC Pool, fails to comply  with one or more of
the ongoing requirements of the Code  for REMIC status during any taxable  year,
the  Code provides that the entity will not  be treated as a REMIC for such year
and thereafter. In  this event,  an entity  with multiple  classes of  ownership
interests  may be  treated as  a separate  association taxable  as a corporation
under Treasury  regulations, and  the  Regular Certificates  may be  treated  as
equity  interests therein. The Code, however, authorizes the Treasury Department
to issue regulations that address situations  where failure to meet one or  more
of the requirements for REMIC status occurs inadvertently and in good faith, and
disqualification  of  the  REMIC  Pool  would  occur  absent  regulatory relief.
Investors should be aware, however, that the Conference Committee Report to  the
1986  Act indicates that the relief may be accompanied by sanctions, such as the
imposition of a corporate tax on all or a portion of the REMIC Pool's income for
the period of time in which the requirements for REMIC status are not satisfied.
 
TAXATION OF REGULAR CERTIFICATES
 
  GENERAL
 
    In general,  interest, original  issue discount,  and market  discount on  a
Regular  Certificate  will be  treated as  ordinary  income to  a holder  of the
Regular Certificate (the "Regular Certificateholder"), and principal payments on
a Regular Certificate will be  treated as a return of  capital to the extent  of
the  Regular  Certificateholder's  basis in  the  Regular  Certificate allocable
thereto. Regular Certificateholders  must use the  accrual method of  accounting
with  regard to  Regular Certificates,  regardless of  the method  of accounting
otherwise used by such Regular Certificateholders.
 
  ORIGINAL ISSUE DISCOUNT
 
    Compound Interest  Certificates  will  be,  and  other  classes  of  Regular
Certificates may be, issued with "original issue discount" within the meaning of
Code  Section 1273(a). Holders of any  Class or Subclass of Regular Certificates
having original issue discount generally must include original issue discount in
ordinary income for  federal income tax  purposes as it  accrues, in  accordance
with  a  constant interest  method that  takes into  account the  compounding of
interest, in advance  of receipt of  the cash attributable  to such income.  The
following  discussion is  based in part  on proposed  Treasury regulations under
Code Sections 1271 through 1273 and 1275 (the "Proposed OID Regulations") and in
part on the  provisions of the  1986 Act. Regular  Certificateholders should  be
aware,  however, that  the Proposed  OID Regulations  do not  adequately address
certain  issues  relevant  to  prepayable   securities,  such  as  the   Regular
Certificates,  and are  subject to change  and are not  binding authority before
being adopted as final or temporary regulations. However, to the extent  adopted
as  currently drafted,  the Proposed  OID Regulations  may apply  to the Regular
Certificates retroactively as binding authority.
 
    Under the Proposed OID Regulations, each Regular Certificate will be treated
as a  single installment  obligation for  purposes of  determining the  original
issue  discount includible  in a  Regular Certificateholder's  income. The total
amount of original issue discount on a Regular Certificate is the excess of  the
"stated redemption price at maturity" of the Regular Certificate over its "issue
price."  The  issue price  of  a Regular  Certificate is  the  price at  which a
substantial amount of Regular Certificates of  that Class are first sold to  the
public.  The issue price of a Regular  Certificate also includes the amount paid
by an initial Regular Certificateholder for  accrued interest that relates to  a
period prior to the issue date of the Regular Certificate. The stated redemption
price  at  maturity  of  a  Regular  Certificate  always  includes  the original
principal amount  of (in  the  case of  Standard  or Stripped  Certificates)  or
initial  Stated Amount of (in the  case of Multi-Class Certificates) the Regular
Certificate, but generally will not include distributions of stated interest  if
such  interest distributions constitute  "qualified periodic interest payments."
Under the  Proposed  OID  Regulations, a  qualified  periodic  interest  payment
generally   means   interest   payable   at   a   single   fixed   rate   or   a
 
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<PAGE>
qualified variable  rate  (as  described  below)  provided  that  such  interest
payments  are actually and unconditionally  payable at fixed, periodic intervals
of one  year  or  less  during  the entire  term  of  the  Regular  Certificate.
Distributions  of  interest  on a  Compound  Interest Certificate,  or  on other
Regular Certificates with respect  to which deferred  interest will accrue,  may
not  constitute qualified periodic  interest payments, in  which case the stated
redemption  price  at  maturity  of  such  Regular  Certificates  includes   all
distributions  of  interest  as  well as  principal  thereon.  Moreover,  if the
interval between the  issue date and  the first Distribution  Date on a  Regular
Certificate  is longer than the  interval between subsequent Distribution Dates,
the Internal Revenue Service could contend  that the initial interval should  be
divided  into a short accrual  period followed by a  period corresponding to the
interval between subsequent Distribution Dates, and that because no distribution
of interest is made on the date  that the short accrual period ends, the  stated
interest  distributions on such Regular  Certificate do not constitute qualified
periodic interest  payments. Accordingly,  the  Internal Revenue  Service  could
contend  that all distributions on such Regular Certificate should be includible
in the stated redemption price at maturity, or that some other adjustment should
be made.  Furthermore,  a portion  of  the  interest distributed  on  the  first
Distribution Date may be treated as nonqualified periodic interest includible in
the stated redemption price at maturity to the extent such interest distribution
is  attributable to a period  in excess of the number  of days between the issue
date and such first Distribution Date. Regular Certificateholders should consult
their own tax advisors to determine the issue price and stated redemption  price
at maturity of a Regular Certificate.
 
    Under  a DE MINIMIS  rule, original issue discount  on a Regular Certificate
will be considered to be zero if such original issue discount is less than 0.25%
of the stated redemption price at maturity of the Regular Certificate multiplied
by the weighted average maturity of  the Regular Certificate. For this  purpose,
the  weighted average maturity of the Regular Certificate is computed as the sum
of the  amounts  determined by  multiplying  the  number of  full  years  (I.E.,
rounding  down partial  years) from  the issue  date until  each distribution in
reduction of stated redemption price  at maturity is scheduled  to be made by  a
fraction,  the numerator of which is the amount of each distribution included in
the stated  redemption price  at maturity  of the  Regular Certificate  and  the
denominator  of which is the stated redemption  price at maturity of the Regular
Certificate. Although currently unclear,  it appears that  the schedule of  such
distributions  should  be  determined in  accordance  with the  assumed  rate of
prepayment of the Mortgage Loans and the anticipated reinvestment rate, if  any,
relating   to  the  Regular  Certificates  (the  "Prepayment  Assumption").  The
Prepayment Assumption with respect to a  Series of Regular Certificates will  be
set forth in the related Prospectus Supplement.
 
    A  Regular Certificateholder generally must include  in gross income for any
taxable year the sum of the "daily portions," as defined below, of the  original
issue  discount on the Regular Certificate  accrued during an accrual period for
each day  on which  it holds  the  Regular Certificate,  including the  date  of
purchase  but excluding the  date of disposition. Although  not free from doubt,
the Seller intends to treat the monthly period ending on each Distribution  Date
as the accrual period, rather than the monthly period corresponding to the prior
calendar  month. With respect to each Regular Certificate, a calculation will be
made of the  original issue discount  that accrues during  each successive  full
accrual  period (or shorter period from the date of original issue) that ends on
the related  Distribution  Date  on  the  Regular  Certificate.  The  Conference
Committee  Report to the  1986 Act states  that the rate  of accrual of original
issue discount  is  intended to  be  based  on the  Prepayment  Assumption.  The
original  issue discount accruing in a full  accrual period would be the excess,
if any,  of (i)  the  sum of  (a) the  present  value of  all of  the  remaining
distributions  to  be made  on the  Regular Certificate  as of  the end  of that
accrual period that are included in the Regular Certificate's stated  redemption
price  at maturity,  and (b) the  distributions made on  the Regular Certificate
during the accrual period that are included in the Regular Certificate's  stated
redemption  price at maturity, over (ii) the adjusted issue price of the Regular
Certificate at the  beginning of the  accrual period. The  present value of  the
remaining  distributions  referred to  in the  preceding sentence  is calculated
based on (i) the yield to maturity of the Regular Certificate at the issue date,
(ii) events (including actual prepayments) that  have occurred prior to the  end
of  the accrual period, and (iii) the Prepayment Assumption. For these purposes,
the adjusted  issue price  of a  Regular  Certificate at  the beginning  of  any
accrual  period equals the issue price  of the Regular Certificate, increased by
the  aggregate  amount  of   original  issue  discount   with  respect  to   the
 
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Regular Certificate that accrued in all prior accrual periods and reduced by the
amount  of distributions included in the Regular Certificate's stated redemption
price at  maturity that  were made  on  the Regular  Certificate in  such  prior
periods.  The original  issue discount  accruing during  any accrual  period (as
determined in this paragraph) 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  an appropriate  allocation under  either an  exact or  approximate
method  set  forth in  the  Proposed OID  Regulations  or some  other reasonable
method, provided  that  such  method  is consistent  with  the  method  used  to
determine the yield to maturity of the Regular Certificate.
 
    Under  the  method described  above, the  daily  portions of  original issue
discount required  to  be included  in  income by  a  Regular  Certificateholder
generally  will  increase  to  take  into  account  prepayments  on  the Regular
Certificates as a result  of prepayments on the  Mortgage Loans that exceed  the
Prepayment  Assumption, and generally will decrease  (but not below zero for any
period) if the  prepayments are slower  than the Prepayment  Assumption. To  the
extent  specified  in  the  applicable  Prospectus  Supplement,  an  increase in
prepayments  on  the  Mortgage  Loans  with  respect  to  a  Series  of  Regular
Certificates  can result in both a change  in the priority of principal payments
with respect to certain Classes of  Regular Certificates and either an  increase
or  decrease in the  daily portions of  original issue discount  with respect to
such Regular Certificates.
 
    A purchaser of a  Regular Certificate at a  price greater than its  "revised
issue  price," as defined below, will be required to include in gross income the
daily portions of the original issue discount on the Regular Certificate reduced
pro rata by a  fraction, the numerator  of which is the  excess of its  purchase
price  over  such  revised issue  price  and  the denominator  of  which  is the
remaining original  issue  discount.  The  revised  issue  price  of  a  Regular
Certificate  is  the sum  of its  original  issue price  and the  original issue
discount that would have been previously accrued by an original holder less  any
prior distributions included in the stated redemption price at maturity.
 
  VARIABLE RATE REGULAR CERTIFICATES
 
    Regular  Certificates may  provide for  interest based  on a  variable rate.
Under the  Proposed  OID  Regulations, a  qualified  periodic  interest  payment
includes any one of a series of payments equal to the product of the outstanding
principal  balance of a Regular Certificate and a variable rate tied to a single
objective index of market interest  rates, provided that such interest  payments
are  actually and  unconditionally payable at  fixed, periodic  intervals of one
year or less during the entire term of the Regular Certificate. In the case of a
Regular Certificate, however, that pays interest based on a combination of fixed
or qualifying variable rates  or at a  variable rate that is  subject to one  or
more maximum rate ceilings or certain other adjustments, it is unclear under the
Proposed OID Regulations whether interest payments on such a Regular Certificate
constitute   qualified  periodic  interest  payments,   or  instead  are  either
includible in the stated redemption price at maturity of the Regular Certificate
or treated as contingent interest payments  includible in income as they  become
fixed.  Further, the Proposed REMIC Regulations generally provide that a Regular
Certificate (i)  bearing a  floating rate  tied to  an objective  index (or  the
highest,  lowest or average of two or more objective indices) of market interest
rates (including  a rate  based on  the average  cost of  funds of  one or  more
financial  institutions) or that represents a  weighted average of rates on some
or all of  the Mortgage  Loans that  bear either a  fixed rate  or a  qualifying
variable  rate, including  such a rate  that is subject  to one or  more caps or
floors, or (ii) bearing one  or more such qualifying  variable rates for one  or
more periods, or one or more fixed rates for one or more periods, qualifies as a
regular interest in a REMIC.
 
    The  amount of original issue discount with respect to a Regular Certificate
bearing a variable rate  of interest will accrue  in the manner described  above
under  "Original Issue Discount," with the yield to maturity and future payments
on such Regular Certificate to be determined by assuming that the interest  rate
index  applicable to the first Distribution Date remains constant throughout the
life of the Regular Certificate. Ordinary income reportable for any period  will
be  adjusted based on subsequent changes  in the applicable interest rate index.
Where the issue price  of a Regular Certificate  exceeds the original  principal
amount or
 
                                       71
<PAGE>
Stated  Amount of the Regular Certificate,  it appears appropriate to reduce the
ordinary income reportable for an accrual period by a portion of such excess  in
a  manner similar  to the  amortization of  premium on  the level  yield method.
Absent clarification, original issue discount  will be reported to the  Internal
Revenue  Service and  to holders  of variable  rate Regular  Certificates in the
manner described in this paragraph using the Prepayment Assumption.
 
    In the  case of  Regular Certificates  bearing an  interest rate  that is  a
weighted  average of the net interest  rates on Mortgage Loans having adjustable
rates, the applicable index  used to compute interest  on the Mortgage Loans  in
effect  on the issue date (or possibly the pricing date) will be deemed to be in
effect beginning with the period in which the first weighted average  adjustment
date  occurring after the issue date occurs. If the Pass-Through Rate for one or
more periods is less  than it would  be based upon the  fully indexed rate,  the
excess  of the  interest payments projected  at the assumed  index over interest
projected at such  initial rate may  be treated as  original issue discount.  In
such  case, a  Regular Certificateholder may  have ordinary income  in excess of
interest received at the initial Pass-Through Rate. An adjustment would be  made
in  each period  either increasing or  decreasing the amount  of ordinary income
reportable to reflect the actual  Pass-Through Rate on the Regular  Certificate.
Unless  and until clarified by applicable  Treasury regulations, the Seller does
not intend to report such excess as original issue discount.
 
  MARKET DISCOUNT
 
    A purchaser  of a  Regular Certificate  also may  be subject  to the  market
discount  rules of Code Sections 1276 through 1278. Under these sections and the
principles applied by the  Proposed OID Regulations in  the context of  original
issue  discount,  "market  discount"  is the  amount  by  which  the purchaser's
original basis in the  Regular Certificate (i) is  exceeded by the  then-current
principal  amount of the Regular  Certificate, or (ii) in  the case of a Regular
Certificate having original  issue discount,  is exceeded by  the revised  issue
price  of such Regular Certificate at the  time of purchase, as described above.
Such purchaser generally will  be required to recognize  ordinary income to  the
extent  of accrued market discount on  such Regular Certificate as distributions
includible in the stated redemption price  at maturity thereof are received,  in
an amount not exceeding any such distribution. Such market discount would accrue
in  a manner to be provided in Treasury regulations and should take into account
the Prepayment  Assumption. The  Conference  Committee Report  to the  1986  Act
provides  that until  such regulations  are issued,  such market  discount would
accrue either (i) on the basis of a constant interest rate, or (ii) in the ratio
of stated interest allocable to the relevant  period to the sum of the  interest
for  such period plus the remaining interest as of the end of such period, or in
the case of a  Regular Certificate issued with  original issue discount, in  the
ratio  of original issue discount accrued for  the relevant period to the sum of
the original issue discount accrued for such period plus the remaining  original
issue  discount as of the end of such period. Such purchaser also generally will
be required to treat a portion of any gain on a sale or exchange of the  Regular
Certificate  as ordinary income to the extent  of the market discount accrued to
the date of  disposition under one  of the foregoing  methods, less any  accrued
market  discount previously reported as ordinary income as partial distributions
in reduction of  the stated  redemption price  at maturity  were received.  Such
purchaser  will be required to defer deduction of a portion of the excess of the
interest paid or accrued on indebtedness incurred to purchase or carry a Regular
Certificate over the  interest distributable  thereon. The  deferred portion  of
such  interest expense in any taxable year generally will not exceed the accrued
market discount on  the Regular  Certificate for  such year.  Any such  deferred
interest  expense is, in general, allowed as a deduction not later than the year
in which  the  related market  discount  income  is recognized  or  the  Regular
Certificate  is  disposed  of. As  an  alternative  to the  inclusion  of market
discount in income  on the  foregoing basis, the  Regular Certificateholder  may
elect to include market discount in income currently as it accrues on all market
discount  instruments acquired by such Regular Certificateholder in that taxable
year or thereafter, in which case the interest deferral rule will not apply.
 
    By analogy to the Proposed OID Regulations, market discount with respect  to
a  Regular Certificate will be considered to  be zero if such market discount is
less than 0.25%  of the remaining  stated redemption price  at maturity of  such
Regular  Certificate multiplied by the weighted  average maturity of the Regular
Certificate (determined  as  described  above  in  the  fourth  paragraph  under
"Original Issue Discount")
 
                                       72
<PAGE>
remaining  after  the date  of purchase.  Treasury regulations  implementing the
market discount rules have not yet  been issued, and therefore investors  should
consult  their own tax advisors regarding the application of these rules as well
as the advisability of making any of the elections with respect thereto.
 
  PREMIUM
 
    A Regular Certificate purchased at a cost greater than its remaining  stated
redemption  price  at maturity  generally  is considered  to  be purchased  at a
premium. If the Regular  Certificateholder holds such  Regular Certificate as  a
"capital   asset"  within  the  meaning  of   Code  Section  1221,  the  Regular
Certificateholder may  elect under  Code Section  171 to  amortize such  premium
under  the constant interest method. The Conference Committee Report to the 1986
Act indicates a Congressional intent that the same rules that will apply to  the
accrual  of  market  discount  on installment  obligations  will  also  apply to
amortizing bond premium under Code  Section 171 on installment obligations  such
as  the Regular Certificates, although it is unclear whether the alternatives to
the constant  interest  method  described  above  under  "Market  Discount"  are
available.  Amortizable bond  premium will be  treated as an  offset to interest
income on a Regular Certificate, rather than as a separate deduction item.
 
  SALE OR EXCHANGE OF REGULAR CERTIFICATES
 
    If a Regular Certificateholder sells or exchanges a Regular Certificate, the
Regular Certificateholder will recognize gain  or loss equal to the  difference,
if  any,  between the  amount received  and  its adjusted  basis in  the Regular
Certificate. The adjusted basis  of a Regular  Certificate generally will  equal
the  cost of the  Regular Certificate to  the seller, increased  by any original
issue discount  or market  discount previously  included in  the seller's  gross
income  with respect to the Regular  Certificate and reduced by amounts included
in the stated redemption price at maturity of the Regular Certificate that  were
previously received by the seller and by any amortized premium.
 
    Except  as described  above with respect  to market discount,  and except as
provided in  this paragraph,  any gain  or loss  on the  sale or  exchange of  a
Regular Certificate realized by an investor who holds the Regular Certificate as
a capital asset will be capital gain or loss and will be long-term or short-term
depending  on whether  the Regular Certificate  has been held  for the long-term
capital gain  holding period  (currently, more  than one  year). Gain  from  the
disposition  of a Regular Certificate that  might otherwise be capital gain will
be treated as ordinary income to the  extent that such gain does not exceed  the
excess,  if any, of (i) the amount that  would have been includible in the gross
income of the holder if his yield  on such Regular Certificate were 110% of  the
applicable  Federal rate under Code Section 1274(d)  as of the date of purchase,
over (ii) the amount of income actually  includible in the gross income of  such
holder  with  respect to  the  Regular Certificate.  In  addition, gain  or loss
recognized from the  sale of a  Regular Certificate by  certain banks or  thrift
institutions will be treated as ordinary income or loss pursuant to Code Section
582(c).  The  preferential  rates  applicable to  long-term  capital  gains were
eliminated by the  1986 Act.  However, the  Revenue Reconciliation  Act of  1990
restored  a preferential rate applicable to long-term capital gains with respect
to certain individuals.
 
TAXATION OF RESIDUAL CERTIFICATES
 
  TAXATION OF REMIC INCOME
 
    Generally, the "daily portions" of REMIC taxable income or net loss will  be
includible  as ordinary income or loss in determining the federal taxable income
of holders of Residual Certificates ("Residual Holders"), and will not be  taxed
separately  to the REMIC Pool. The daily portions of REMIC taxable income or net
loss of a Residual Holder are determined by allocating the REMIC Pool's  taxable
income or net loss for each calendar quarter ratably to each day in such quarter
and by allocating such daily portion among the Residual Holders in proportion to
their  respective holdings  of Residual Certificates  in the REMIC  Pool on such
day. REMIC taxable  income is  generally determined in  the same  manner as  the
taxable  income of an individual using  the accrual method of accounting, except
that (i)  the limitation  on deductibility  of investment  interest expense  and
expenses  for the production of income do not  apply, (ii) all bad loans will be
deductible as business bad debts, and (iii) the limitation on the  deductibility
of  interest and expenses related to tax-exempt income will apply. REMIC taxable
income generally means the REMIC Pool's gross income,
 
                                       73
<PAGE>
including interest, original issue discount income, and market discount  income,
if  any, on the  Mortgage Loans, plus  income on reinvestment  of cash flows and
reserve assets, minus deductions, including interest and original issue discount
expense on the Regular  Certificates, servicing fees on  the Mortgage Loans  and
other administrative expenses of the REMIC Pool, and amortization of premium, if
any,  with respect to the Mortgage  Loans. The requirement that Residual Holders
report their pro rata share of taxable income or net loss of the REMIC Pool will
continue until there  are no  Certificates of any  class of  the related  Series
outstanding.
 
    The  taxable income recognized by a Residual Holder in any taxable year will
be affected by,  among other  factors, the  relationship between  the timing  of
recognition of interest and original issue discount or market discount income or
amortization of premium with respect to the Mortgage Loans, on the one hand, and
the timing of deductions for interest (including original issue discount) on the
Regular  Certificates, on the other  hand. In the event  that an interest in the
Mortgage Loans is acquired by the REMIC Pool  at a discount, and one or more  of
such Mortgage Loans is prepaid, the Residual Holder may recognize taxable income
without being entitled to receive a corresponding amount of cash because (i) the
prepayment may be used in whole or in part to make distributions in reduction of
principal or Stated Amount on the Regular Certificates, and (ii) the discount on
the  Mortgage  Loans which  is  includible in  income  may exceed  the deduction
allowed upon such distributions on those Regular Certificates on account of  any
unaccrued  original issue discount relating  to those Regular Certificates. When
there is more than one Class  of Regular Certificates that distribute  principal
or  payments in  reduction of  Stated Amount  sequentially, this  mismatching of
income and  deductions  is particularly  likely  to  occur in  the  early  years
following  issuance of the Regular  Certificates when distributions in reduction
of principal or Stated Amount  are being made in  respect of earlier Classes  of
Regular  Certificates  to  the extent  that  such  Classes are  not  issued with
substantial discount. If taxable  income attributable to  such a mismatching  is
realized, in general, losses would be allowed in later years as distributions on
the  later Classes of Regular Certificates are  made. Taxable income may also be
greater in  earlier years  than in  later years  as a  result of  the fact  that
interest  expense  deductions,  expressed  as a  percentage  of  the outstanding
principal amount of  such a Series  of Regular Certificates,  may increase  over
time as distributions in reduction of principal or Stated Amount are made on the
lower  yielding Classes  of Regular  Certificates, whereas  interest income with
respect to  any  given  Mortgage  Loan  will remain  constant  over  time  as  a
percentage  of  the outstanding  principal  amount of  that  loan. Consequently,
Residual Holders must have sufficient other sources of cash to pay any  federal,
state,  or local income taxes  due as a result  of such mismatching or unrelated
deductions against which  to offset such  income, subject to  the discussion  of
"excess  inclusions" below  under "Limitations on  Offset or  Exemption of REMIC
Income." The timing of  such mismatching of income  and deductions described  in
this  paragraph, if present with respect to a Series of Certificates, may have a
significant adverse effect upon the Residual Holder's after-tax rate of  return.
In  addition,  a Residual  Holder's taxable  income  during certain  periods may
exceed the  income  reflected  by  such Residual  Holder  for  such  periods  in
accordance  with  generally  accepted  accounting  principles.  Investors should
consult their  own  accountants concerning  the  accounting treatment  of  their
investment in Residual Certificates.
 
  BASIS AND LOSSES
 
    The  amount of any net loss of the REMIC Pool that may be taken into account
by the  Residual  Holder  is limited  to  the  adjusted basis  of  the  Residual
Certificate  as  of the  close of  the quarter  (or time  of disposition  of the
Residual Certificate if earlier), determined without taking into account the net
loss for the quarter. The  initial adjusted basis of  a purchaser of a  Residual
Certificate  is the  amount paid  for such  Residual Certificate.  Such adjusted
basis will  be increased  by the  amount of  taxable income  of the  REMIC  Pool
reportable  by the Residual Holder  and will be decreased  (but not below zero),
first, by a cash distribution from the REMIC Pool and, second, by the amount  of
loss  of the  REMIC Pool  reportable by  the Residual  Holder. Any  loss that is
disallowed on account of this limitation  may be carried over indefinitely  with
respect  to the Residual Holder  as to whom such loss  was disallowed and may be
used by such Residual  Holder only to  offset any income  generated by the  same
REMIC Pool.
 
                                       74
<PAGE>
    A Residual Holder will not be permitted to amortize directly the cost of its
Residual  Certificate as  an offset to  its share  of the taxable  income of the
related REMIC Pool. However, that taxable income will not include cash  received
by  the REMIC Pool that  represents a recovery of the  REMIC Pool's basis in its
assets. Such  recovery of  basis  by the  REMIC Pool  will  have the  effect  of
amortization  of the issue  price of the Residual  Certificates over their life.
However, in view of the possible acceleration of the income of Residual  Holders
described  above under "Taxation of REMIC Income," the period of time over which
such issue price is effectively amortized  may be longer than the economic  life
of the Residual Certificates.
 
    A Residual Certificate may have a negative value if the net present value of
anticipated tax liabilities exceeds the present value of anticipated cash flows.
In  such event, it is unclear whether its  issue price would be considered to be
zero or such negative amount for purposes of determining the REMIC Pool's  basis
in  its assets. The  Proposed REMIC Regulations do  not address whether residual
interests could have a negative basis  and a negative issue price. However,  the
preamble  to the Proposed  REMIC Regulations indicates  that, while existing tax
rules do  not  accommodate  such  concepts,  the  Internal  Revenue  Service  is
considering  the tax treatment  of these types  of residual interests, including
whether such residual interests  may have a negative  basis or a negative  issue
price.  The Seller does not intend to  treat a Class of Residual Certificates as
having a value of less  than zero for purposes of  determining the basis of  the
related REMIC Pool in its assets.
 
    Further,  to the extent that the initial adjusted basis of a Residual Holder
(other than an original holder) in the Residual Certificate is greater than  the
corresponding  portion  of the  REMIC Pool's  basis in  the Mortgage  Loans, the
Residual Holder will not  recover a portion of  such basis until termination  of
the REMIC Pool unless Treasury regulations yet to be issued provide for periodic
adjustments  to  the  REMIC  income otherwise  reportable  by  such  holder. The
Proposed REMIC Regulations do not so provide. See "Treatment of Certain Items of
REMIC Income and Expense--Market Discount" below regarding the basis of Mortgage
Loans to the REMIC Pool and "Sale  or Exchange of a Residual Certificate"  below
regarding  possible treatment of a loss upon  termination of the REMIC Pool as a
capital loss.
 
  TREATMENT OF CERTAIN ITEMS OF REMIC INCOME AND EXPENSE
 
    ORIGINAL ISSUE  DISCOUNT.    Generally,  the  REMIC  Pool's  deductions  for
original  issue discount will be determined in the same manner as original issue
discount income on Regular  Certificates as described  above under "Taxation  of
Regular  Certificates--Original  Issue  Discount" and  "--Variable  Rate Regular
Certificates," without regard to the DE MINIMIS rule described therein.
 
    MARKET DISCOUNT.  The REMIC Pool will have market discount income in respect
of Mortgage Loans if, in general, the  basis of the REMIC Pool in such  Mortgage
Loans  is exceeded by their unpaid principal balances. The REMIC Pool's basis in
such Mortgage Loans  is generally the  fair market value  of the Mortgage  Loans
immediately  after the  transfer thereof to  the REMIC Pool.  The Proposed REMIC
Regulations provide  that such  basis is  equal in  the aggregate  to the  issue
prices  of all regular and  residual interests in the  REMIC Pool. In respect of
Mortgage Loans that have market discount to which Code Section 1276 applies, the
accrued portion of such market discount would be recognized currently as an item
of ordinary income. Market discount income generally should accrue in the manner
described above  under  "Taxation  of  Regular  Certificates--Market  Discount."
However,  the rules of Code Section  1276 concerning market discount income will
not apply in the case of Mortgage Loans originated on or prior to July 18, 1984,
if any.  With respect  to  such Mortgage  Loans,  market discount  is  generally
includible  in  REMIC  taxable  income  or ordinary  gross  income  pro  rata as
principal payments are  received. The  deduction of  a portion  of the  interest
expense  on the Regular Certificates allocable  to such discount may be deferred
until such discount is included in income, and any gain on the sale or  exchange
thereof  will  be treated  as  ordinary income  to  the extent  of  the deferred
interest deductible at that time.
 
    PREMIUM.  Generally, if the  basis of the REMIC  Pool in the Mortgage  Loans
exceeds the unpaid principal balances thereof, the REMIC Pool will be considered
to  have acquired such Mortgage  Loans at a premium equal  to the amount of such
excess. As stated above, the  REMIC Pool's basis in  Mortgage Loans is the  fair
market  value of the Mortgage Loans, based  on the aggregate of the issue prices
of the regular and
 
                                       75
<PAGE>
residual interests in the REMIC Pool  immediately after the transfer thereof  to
the REMIC Pool. In a manner analogous to the discussion above under "Taxation of
Regular Certificates--Premium," a person that holds a Mortgage Loan as a capital
asset  under Code  Section 1221  may elect  under Code  Section 171  to amortize
premium on Mortgage Loans originated after  September 27, 1985 under a  constant
interest  method.  Amortizable bond  premium  will be  treated  as an  offset to
interest income on the Mortgage Loans, rather than as a separate deduction item.
Because substantially all of the mortgagors  on the Mortgage Loans are  expected
to  be  individuals, Code  Section  171 will  not  be available  for  premium on
Mortgage Loans  originated on  or  prior to  September  27, 1985.  Premium  with
respect to such Mortgage Loans may be deductible in accordance with a reasonable
method  regularly employed by the holder thereof. The allocation of such premium
pro rata  among principal  payments should  be considered  a reasonable  method;
however,  the Internal  Revenue Service  may argue  that such  premium should be
allocated in a different manner, such as allocating such premium entirely to the
final payment of principal.
 
  LIMITATIONS ON OFFSET OR EXEMPTION OF REMIC INCOME
 
    The Code  provides that,  to  the extent  provided  in regulations,  if  the
aggregate  value of the Residual Certificates relative to the aggregate value of
the  Regular  Certificates  and  Residual  Certificates  is  considered  to   be
"significant,"  as described below,  then a portion  (but not all)  of the REMIC
taxable income includible in determining the  federal income tax liability of  a
Residual  Holder will be subject to special treatment. That portion, referred to
as the "excess inclusion," is  equal to the excess  of REMIC taxable income  for
the calendar quarter allocable to a Residual Certificate over the daily accruals
for  such quarterly period of (i) 120%  of the long-term applicable Federal rate
that would  have  applied  to  the  Residual Certificate  (if  it  were  a  debt
instrument)  on the Startup  Day under Code Section  1274(d), multiplied by (ii)
the adjusted issue price of such  Residual Certificate at the beginning of  such
quarterly  period.  For this  purpose, the  adjusted issue  price of  a Residual
Certificate at the beginning  of a quarter  is the issue  price of the  Residual
Certificate, plus the amount of such daily accruals of REMIC income described in
this  paragraph for all prior quarters, decreased by any distributions made with
respect to such Residual  Certificate prior to the  beginning of such  quarterly
period.  Although the Conference Committee Report to the 1986 Act indicates that
the value of all Residual Certificates would be considered significant in  cases
where  such  value  is  at  least  2% of  the  aggregate  value  of  the Regular
Certificates and Residual  Certificates, the Proposed  REMIC Regulations do  not
adopt  such a general rule. Accordingly, the portion of the REMIC Pool's taxable
income that  will be  treated as  excess inclusions  will be  determined by  the
preceding  formula, with the effect that such excess inclusions will be a larger
portion of  such income  as  the relative  value  of the  Residual  Certificates
diminishes.
 
    The  portion of a  Residual Holder's REMIC taxable  income consisting of the
excess inclusions generally may not be offset by other deductions, including net
operating loss carryforwards, on such Residual Holder's return. Further, if  the
Residual  Holder is  an organization  subject to  the tax  on unrelated business
income imposed by Code Section 511, the Residual Holder's excess inclusions will
be treated as  unrelated business  taxable income  of such  Residual Holder  for
purposes  of Code Section 511.  In addition, REMIC taxable  income is subject to
30% withholding tax with respect to certain persons who are not U.S. Persons (as
defined  below  under   "Tax-Related  Restrictions  on   Transfer  of   Residual
Certificates--Foreign  Investors"),  and  the  portion  thereof  attributable to
excess inclusions is not eligible for  any reduction in the rate of  withholding
tax   (by   treaty   or   otherwise).   See   "Taxation   of   Certain   Foreign
Investors--Residual Certificates" below. Finally, under Treasury regulations yet
to be issued, if a real estate  investment trust owns a Residual Certificate,  a
portion  of dividends  paid by  the real  estate investment  trust could  not be
offset by net operating losses  of its shareholders, would constitute  unrelated
business taxable income for tax-exempt shareholders, and would be ineligible for
reduction  of  withholding to  certain persons  who are  not U.S.  Persons. This
treatment may be  extended under  Treasury regulations  to regulated  investment
companies, common trust funds, and certain cooperatives.
 
    An  exception  to  the  inability  of a  Residual  Holder  to  offset excess
inclusions with unrelated deductions  and net operating  losses applies to  Code
Section  593 institutions ("thrift institutions"). For purposes of applying this
rule, all  members of  an  affiliated group  filing  a consolidated  return  are
treated as one taxpayer,
 
                                       76
<PAGE>
except that thrift institutions to which Code Section 593 applies, together with
their subsidiaries formed to issue REMICs, are treated as separate corporations.
Furthermore,  the Code provides  that regulations may disallow  the ability of a
thrift institution to use deductions to offset excess inclusions if necessary or
appropriate to  prevent the  avoidance of  tax. The  Proposed REMIC  Regulations
provide that a thrift institution may not so offset its excess inclusions unless
the  Residual Certificates have "significant value," which requires that (i) the
Residual Certificates have an issue  price that is at least  equal to 2% of  the
aggregate  of  the  issue  prices  of  all  Residual  Certificates  and  Regular
Certificates with respect to the REMIC  Pool, and (ii) the anticipated  weighted
average  life of the  Residual Certificates is  at least 20%  of the anticipated
life (I.E., final maturity) of the REMIC Pool. The anticipated weighted  average
life of the Residual Certificates is based on the anticipated principal payments
to  be recieved with  respect thereto (using  the Prepayment Assumption), except
that all anticipated distributions are to be used if the Residual Certificate is
not entitled to any principal payments,  or is entitled to a  disproportionately
small  principal  amount relative  to interest  payments thereon.  The principal
amount will be  considered disproportionately small  if the issue  price of  the
Residual  Certificates exceeds 125% of  their initial principal amount. Finally,
an ordering rule  under the Proposed  REMIC Regulations provides  that a  thrift
institution may only offset its excess inclusion income with deductions after it
has  first applied  its deductions against  income that is  not excess inclusion
income. If applicable, the Prospectus Supplement  with respect to a Series  will
set  forth whether the  Residual Certificates are  expected to have "significant
value" within the meaning of the Proposed REMIC Regulations.
 
  TAX-RELATED RESTRICTIONS ON TRANSFER OF RESIDUAL CERTIFICATES
 
    DISQUALIFIED ORGANIZATIONS.    If any  legal  or beneficial  interest  in  a
Residual  Certificate is transferred to  a Disqualified Organization (as defined
below), a tax  would be imposed  in an amount  equal to the  product of (i)  the
present  value of the  total anticipated excess inclusions  with respect to such
Residual Certificate  for  periods  after  the transfer  and  (ii)  the  highest
marginal  federal income tax rate applicable to corporations. The Proposed REMIC
Regulations provide that the anticipated  excess inclusions are based on  actual
prepayment  experience to the date of  the transfer and projected payments based
on the  Prepayment Assumption.  The  present value  rate equals  the  applicable
federal  rate under Code  Section 1274(d) as of  the date of  the transfer for a
term equal to the remaining term of the  REMIC, and such rate is applied to  the
anticipated excess inclusions from the end of the remaining calendar quarters in
which  they arise  to the date  of the transfer.  Such a tax  generally would be
imposed on the transferor  of the Residual Certificate,  except that where  such
transfer  is through an agent (including  a broker, nominee, or other middleman)
for a Disqualified Organization, the tax would instead be imposed on such agent.
However, a transferor of a Residual Certificate would in no event be liable  for
such  tax  with  respect  to  a transfer  if  the  transferee  furnishes  to the
transferor an affidavit that the  transferee is not a Disqualified  Organization
and,  as  of the  time  of the  transfer, the  transferor  does not  have actual
knowledge that  such affidavit  is false.  The tax  also may  be waived  by  the
Treasury  Department if the  Disqualified Organization promptly  disposes of the
residual interest and the  transferor pays income tax  at the highest  corporate
rate on the excess inclusion for the period the Residual Certificate is actually
held by the Disqualified Organization.
 
    In  addition,  if  a "Pass-Through  Entity"  (as defined  below)  has excess
inclusion income with respect  to a Residual Certificate  during a taxable  year
and  a Disqualified Organization is  the record holder of  an equity interest in
such entity, then a tax  is imposed on such entity  equal to the product of  (i)
the  amount  of excess  inclusions that  are  allocable to  the interest  in the
Pass-Through Entity during the period such interest is held by such Disqualified
Organization, and (ii) the highest  marginal federal corporate income tax  rate.
Such  tax would be deductible from the ordinary gross income of the Pass-Through
Entity for the  taxable year. The  Pass-Through Entity would  not be liable  for
such  tax if it has received an affidavit from such record holder that it is not
a Disqualified  Organization or  stating such  holder's taxpayer  identification
number  and, during the period such person  is the record holder of the Residual
Certificate, the Pass-Through Entity  does not have  actual knowledge that  such
affidavit is false.
 
    For these purposes, (i) "Disqualified Organization" means the United States,
any  state  or  political  subdivision  thereof,  any  foreign  government,  any
international organization, any agency or instrumentality of
 
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any  of  the  foregoing   (provided,  that  such  term   does  not  include   an
instrumentality  if all of its  activities are subject to  tax and a majority of
its board of  directors is not  selected by any  such governmental entity),  any
cooperative  organization  furnishing  electric  energy  or  providing telephone
service to persons in  rural areas as described  in Code Section  1381(a)(2)(C),
and  any  organization  (other than  a  farmers' cooperative  described  in Code
Section  521)  that  is  exempt  from  taxation  under  the  Code  unless   such
organization  is subject to the tax on unrelated business income imposed by Code
Section 511,  and  (ii) "Pass-Through  Entity"  means any  regulated  investment
company,  real estate investment trust, common trust fund, partnership, trust or
estate and certain corporations operating on a cooperative basis. Except as  may
be  provided  in  Treasury regulations,  any  person  holding an  interest  in a
Pass-Through Entity  as  a  nominee  for another  will,  with  respect  to  such
interest, be treated as a Pass-Through Entity.
 
    The  Pooling and Servicing  Agreement with respect to  a Series will provide
that  no  legal  or  beneficial  interest  in  a  Residual  Certificate  may  be
transferred  or registered  unless (i) the  proposed transferee  provides to the
Seller and the Trustee an affidavit to the effect that such transferee is not  a
Disqualified  Organization,  is  not purchasing  such  Residual  Certificates on
behalf of a Disqualified Organization (I.E., as a broker, nominee, or  middleman
thereof) and is not an entity that holds REMIC residual securities as nominee to
facilitate  the clearance and  settlement of such  securities through electronic
book-entry changes  in accounts  of participating  organizations, and  (ii)  the
transferor provides a statement in writing to the Seller and the Trustee that it
has  no actual knowledge that such affidavit is false. Moreover, the Pooling and
Servicing Agreement will  provide that  any attempted or  purported transfer  in
violation  of these transfer restrictions will be null and void and will vest no
rights in any purported transferee. Each Residual Certificate with respect to  a
Series  will bear a legend referring to  such restrictions on transfer, and each
Residual Holder  will be  deemed to  have agreed,  as a  condition of  ownership
thereof,  to  any  amendments to  the  related Pooling  and  Servicing Agreement
required under the  Code or  applicable Treasury regulations  to effectuate  the
foregoing  restrictions. Information  necessary to compute  an applicable excise
tax must be  furnished to  the Internal Revenue  Service and  to the  requesting
party  within 60 days of the request, and the Seller or the Trustee may charge a
fee for computing and providing such information.
 
    NONECONOMIC RESIDUAL  INTERESTS.    The  Proposed  REMIC  Regulations  would
disregard  certain  transfers  of  Residual  Certificates,  in  which  case  the
transferor  would  continue  to  be  treated  as  the  owner  of  the   Residual
Certificates  and thus  would continue  to be  subject to  tax on  its allocable
portion of  the  net  income  of  the  REMIC  Pool.  Under  the  Proposed  REMIC
Regulations,  a transfer of a "noneconomic residual interest" (defined below) to
a Residual Holder (other  than a Residual  Holder who is not  a U.S. Person,  as
defined  below under "Foreign Investors") is  disregarded for all federal income
tax purposes unless  no significant  purpose of the  transfer is  to impede  the
assessment  or collection of  tax. A residual  interest in a  REMIC (including a
residual interest with a positive value at issuance) is a "noneconomic  residual
interest"  unless, at  the time of  the transfer,  (i) the present  value of the
expected future  distributions on  the  residual interest  at least  equals  the
product  of  the present  value  of the  anticipated  excess inclusions  and the
highest corporate income tax rate in effect  for the year in which the  transfer
occurs,  and (ii)  the transferor  reasonably expects  that the  transferee will
receive distributions from the REMIC at or after the time at which taxes  accrue
on  the anticipated  excess inclusions  in an  amount sufficient  to satisfy the
accrued taxes. The anticipated excess inclusions and the present value rate  are
determined   in  the  same  manner  as   set  forth  above  under  "Disqualified
Organizations." The Proposed REMIC Regulations do not explain when a substantial
purpose of  a  transfer  will be  deemed  to  be to  impede  the  assessment  or
collection  of tax.  While complete  assurance as to  how to  meet this standard
cannot be provided,  the Indenture  will require  the transferee  of a  Residual
Certificate  to state as part of the affidavit described above under the heading
"Disqualified Organizations" that such transferee has no intention to impede the
assessment or collection of any federal, state or local income taxes required to
be paid with respect to the  Residual Certificate, and the transferor must  have
no reason to believe that such statement is untrue.
 
    FOREIGN INVESTORS.  The Proposed REMIC Regulations provide that the transfer
of  a  Residual Certificate  that has  "tax avoidance  potential" to  a "foreign
person"   will   be   disregarded   for   all   federal   tax   purposes.   This
 
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<PAGE>
rule  appears intended to apply  to a transferee who is  not a "U.S. Person" (as
defined below), unless  such transferee's income  is effectively connected  with
the  conduct  of  a trade  or  business  within the  United  States.  A Residual
Certificate is deemed to have tax avoidance potential unless, at the time of the
transfer, (i) the future value of expected distributions equals at least 30%  of
the  anticipated excess inclusions  after the transfer,  and (ii) the transferor
reasonably expects  that the  transferee will  receive sufficient  distributions
from  the REMIC Pool at or after the  time at which the excess inclusions accrue
for the  accumulated  withholding  tax  liability  to  be  paid,  even  if  such
distributions are "substantially deferred." If the non-U.S. Person transfers the
Residual Certificate back to a U.S. Person, the transfer will be disregarded and
the  foreign  transferor  will  continue  to  be  treated  as  the  owner unless
arrangements are made so that the transfer does not have the effect of  allowing
the transferor to avoid tax on accrued excess inclusions.
 
    The  Prospectus  Supplement relating  to the  Certificates  of a  Series may
provide that a Residual  Certificate may not be  purchased by or transferred  to
any  person that  is not  a U.S.  Person or  may describe  the circumstances and
restrictions pursuant  to which  such a  transfer may  be made.  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 or trust that
is subject to U.S. federal income tax regardless of the source of its income.
 
  SALE OR EXCHANGE OF A RESIDUAL CERTIFICATE
 
    Upon the sale  or exchange of  a Residual Certificate,  the Residual  Holder
will  recognize gain or loss equal to the excess, if any, of the amount realized
over the  adjusted  basis  (as  described  above  under  "Taxation  of  Residual
Certificates--Basis  and  Losses")  of  such Residual  Holder  in  such Residual
Certificate at the time of  the sale or exchange.  In addition to reporting  the
taxable  income of the REMIC Pool, a Residual Holder will have taxable income to
the extent that any cash  distribution to him from  the REMIC Pool exceeds  such
adjusted  basis on that Distribution  Date. Such income will  be treated as gain
from the sale or exchange of the  Residual Certificate. It is possible that  the
termination of the REMIC Pool may be treated as a sale or exchange of a Residual
Holder's  Residual Certificate,  in which  case, if  the Residual  Holder has an
adjusted basis in his  Residual Certificate remaining when  his interest in  the
REMIC  Pool terminates, and if  he holds such Residual  Certificate as a capital
asset under Code Section  1221, then he  will recognize a  capital loss at  that
time in the amount of such remaining adjusted basis.
 
    The  Conference Committee  Report to the  1986 Act provides  that, except as
provided in Treasury regulations yet to be  issued, the wash sale rules of  Code
Section  1091  will apply  to dispositions  of  Residual Certificates  where the
seller of  the Residual  Certificate,  during the  period beginning  six  months
before the sale or disposition of the Residual Certificate and ending six months
after  such sale or disposition, acquires  (or enters into any other transaction
that results in the application of  Code Section 1091) any residual interest  in
any  REMIC or  any interest in  a "taxable  mortgage pool" (such  as a non-REMIC
owner trust) that is economically comparable to a Residual Certificate.
 
  TAXES THAT MAY BE IMPOSED ON THE REMIC POOL
 
    PROHIBITED TRANSACTIONS.   Income  from certain  transactions by  the  REMIC
Pool,  called prohibited  transactions, will not  be part of  the calculation of
income or loss includible in the federal income tax returns of Residual Holders,
but rather will be taxed directly to  the REMIC Pool at a 100% rate.  Prohibited
transactions generally include (i) the disposition of a qualified mortgage other
than  for (a) substitution within  two years of the  Startup Day for a defective
(including a defaulted) obligation (or repurchase  in lieu of substitution of  a
defective  (including a defaulted) obligation at  any time) or for any qualified
mortgage within three months  of the Startup Day,  (b) foreclosure, default,  or
imminent  default of a  qualified mortgage, (c) bankruptcy  or insolvency of the
REMIC Pool,  or (d)  a qualified  (complete) liquidation,  (ii) the  receipt  of
income  from assets that are  not the type of  mortgages or investments that the
REMIC Pool is permitted to hold, (iii) the receipt of compensation for services,
or (iv) the receipt of gain from disposition of cash flow investments other than
pursuant to a qualified liquidation. Notwithstanding  (i) and (iv), it is not  a
prohibited  transaction  to sell  REMIC Pool  property to  prevent a  default on
Regular Certificates as a result of a default on
 
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<PAGE>
qualified mortgages or  to facilitate  a clean-up call  (generally, an  optional
termination to save administrative costs when no more than a small percentage of
the  Certificates is outstanding). The  Proposed REMIC Regulations indicate that
the modification  of  a  Mortgage  Loan  generally will  not  be  treated  as  a
disposition  if it is occasioned by a default or reasonably foreseeable default,
an assumption of the Mortgage Loan, the  waiver of a due-on-sale clause, or  the
conversion  of  an interest  rate  by a  mortgagor pursuant  to  the terms  of a
convertible adjustable rate Mortgage Loan.
 
    CONTRIBUTIONS TO THE  REMIC POOL  AFTER THE STARTUP  DAY.   In general,  the
REMIC  Pool will be subject to a tax at a 100% rate on the value of any property
contributed to the REMIC Pool after the Startup Day. Exceptions are provided for
cash contributions to the REMIC Pool  (i) during the three months following  the
Startup  Day, (ii) made to a qualified  reserve fund by a Residual Holder, (iii)
in the nature of a guarantee, (iv) made to facilitate a qualified liquidation or
clean-up call, and (v) as otherwise permitted in Treasury regulations yet to  be
issued.
 
    NET  INCOME FROM FORECLOSURE  PROPERTY.  The  REMIC Pool will  be subject to
federal income tax at the highest corporate rate on "net income from foreclosure
property," determined  by  reference to  the  rules applicable  to  real  estate
investment  trusts. Generally, property acquired by  deed in lieu of foreclosure
would be  treated as  "foreclosure property"  for a  period of  two years,  with
possible  extensions. Net income from  foreclosure property generally means gain
from the sale  of a foreclosure  property that is  inventory property and  gross
income   from  foreclosure  property  other  than  qualifying  rents  and  other
qualifying income for a real estate investment trust.
 
  LIQUIDATION OF THE REMIC POOL
 
    If a REMIC Pool and the Trustee adopt a plan of complete liquidation, within
the meaning of Code Section 860F(a)(4)(A)(i), and sell all of its assets  (other
than  cash) within a 90-day period beginning on  the date of the adoption of the
plan of liquidation, then the REMIC Pool  will recognize no gain or loss on  the
sale  of its  assets, provided  that the  REMIC Pool  credits or  distributes in
liquidation all of the sale proceeds plus its cash (other than amounts  retained
to  meet claims) to holders of  Regular Certificates and Residual Holders within
the 90-day period.
 
  ADMINISTRATIVE MATTERS
 
    The REMIC Pool will  be required to  maintain its books  on a calendar  year
basis  and to file federal income tax returns for federal income tax purposes in
a manner similar to a partnership. The  form for such income tax return is  Form
1066,  U.S. Real  Estate Mortgage  Investment Conduit  Income Tax  Return. Under
TAMRA, the Trustee will be required  to sign the REMIC Pool's returns.  Treasury
regulations  provide that, except where there is a single Residual Holder for an
entire taxable  year, the  REMIC Pool  will  be subject  to the  procedural  and
administrative  rules  of the  Code  applicable to  partnerships,  including the
determination by the Internal Revenue Service of any adjustments to, among other
things, items of  REMIC income, gain,  loss, deduction, or  credit in a  unified
administrative proceeding. The Servicer will be obligated to act as "tax matters
person,"  as defined  in applicable  Treasury regulations,  with respect  to the
REMIC Pool, in its capacity as either  Residual Holder or agent of the  Residual
Holders.  If  the Code  or  applicable Treasury  regulations  do not  permit the
Servicer to act as tax matters person  in its capacity as agent of the  Residual
Holders, the Residual Holder chosen by the Residual Holders or such other person
specified  pursuant  to Treasury  regulations  will be  required  to act  as tax
matters person.
 
LIMITATIONS ON DEDUCTION OF CERTAIN EXPENSES
 
    An investor  who is  an individual,  estate,  or trust  will be  subject  to
limitation with respect to certain itemized deductions described in Code Section
67, to the extent that such itemized deductions, in the aggregate, do not exceed
2%  of  the  investor's adjusted  gross  income.  In addition,  Code  Section 68
provides that itemized deductions otherwise allowable  for a taxable year of  an
individual  taxpayer will be reduced  by the lesser of (i)  3% of the excess, if
any, of adjusted gross income  over $100,000 ($50,000 in  the case of a  married
individual  filing a  separate return),  or (ii) 80%  of the  amount of itemized
deductions otherwise allowable for such year. In the case of a REMIC Pool,  such
deductions may include deductions
 
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<PAGE>
under  Code Section 212 for  the Servicing Fee and  all administrative and other
expenses relating to the  REMIC Pool, or any  similar expenses allocated to  the
REMIC  Pool with respect to  a regular interest it  holds in another REMIC. Such
investors who  hold REMIC  Certificates either  directly or  indirectly  through
certain  pass-through entities  may have their  pro rata share  of such expenses
allocated to  them  as additional  gross  income, but  may  be subject  to  such
limitation  on deductions. In addition, such  expenses are not deductible at all
for purposes  of computing  the  alternative minimum  tax,  and may  cause  such
investors  to  be subject  to  significant additional  tax  liability. Temporary
Treasury regulations provide that the additional gross income and  corresponding
amount  of expenses  generally are  to be allocated  entirely to  the holders of
Residual Certificates in the case  of a REMIC Pool that  would not qualify as  a
fixed  investment  trust  in the  absence  of  a REMIC  election.  However, such
additional gross income and limitation on deductions will apply to the allocable
portion of such expenses to holders of Regular Certificates, as well as  holders
of Residual Certificates, where such Regular Certificates are issued in a manner
that  is similar  to pass-through certificates  in a fixed  investment trust. In
general, such allocable  portion will be  determined based on  the ratio that  a
REMIC  Certificateholder's income,  determined on  a daily  basis, bears  to the
income of all  holders of  Regular Certificates and  Residual Certificates  with
respect  to a REMIC  Pool. As a  result, individuals, estates  or trusts holding
REMIC Certificates  (either  directly or  indirectly  through a  grantor  trust,
partnership,  S  corporation,  REMIC,  or  certain  other  pass-through entities
described in  the foregoing  temporary Treasury  regulations) may  have  taxable
income  in excess  of the  interest income at  the pass-through  rate on Regular
Certificates that are issued  in a single class  or otherwise consistently  with
fixed investment trust status or in excess of cash distributions for the related
period on Residual Certificates.
 
TAXATION OF CERTAIN FOREIGN INVESTORS
 
  REGULAR CERTIFICATES
 
    Interest,  including  original  issue  discount,  distributable  to  Regular
Certificateholders who are non-resident  aliens, foreign corporations, or  other
Non-U.S.  Persons (as  defined below),  will be  considered "portfolio interest"
and, therefore, generally will not be  subject to 30% United States  withholding
tax,  provided that such  Non-U.S. Person (i) is  not a "10-percent shareholder"
within the  meaning  of  Code  Section  871(h)(3)(B)  or  a  controlled  foreign
corporation  described  in  Code  Section  881(c)(3)(C)  and  (ii)  provides the
Trustee, or the person who would otherwise be required to withhold tax from such
distributions under Code Section  1441 or 1442,  with an appropriate  statement,
signed under penalties of perjury, identifying the beneficial owner and stating,
among  other things, that the  beneficial owner of the  Regular Certificate is a
Non-U.S. Person. If  such statement,  or any  other required  statement, is  not
provided, 30% withholding will apply unless reduced or eliminated pursuant to an
applicable  tax  treaty or  unless the  interest on  the Regular  Certificate is
effectively connected with the conduct of a trade or business within the  United
States by such Non-U.S. Person. In the latter case, such Non-U.S. Person will be
subject  to United States federal income tax at regular rates. Investors who are
Non-U.S. Persons should consult  their own tax  advisors regarding the  specific
tax  consequences to  them of owning  a Regular Certificate.  The term "Non-U.S.
Person" means any person who is not a U.S. Person.
 
  RESIDUAL CERTIFICATES
 
    The Conference Committee Report to the 1986 Act indicates that amounts  paid
to  Residual  Holders  who are  Non-U.S.  Persons  are treated  as  interest for
purposes of  the 30%  (or  lower treaty  rate)  United States  withholding  tax.
Treasury  regulations provide that  amounts distributed to  Residual Holders may
qualify as "portfolio interest", subject to the conditions described in "Regular
Certificates" above, but  only to the  extent that (i)  the Mortgage Loans  were
issued  after July  18, 1984  and (ii)  the Trust  Estate or  segregated pool of
assets therein (as to which  a separate REMIC election  will be made), to  which
the  Residual Certificate relates, consists of obligations issued in "registered
form" within the meaning  of Code Section  163(f)(1). Generally, Mortgage  Loans
will  not be, but  regular interests in  another REMIC Pool  will be, considered
obligations issued in registered form.  Furthermore, a Residual Holder will  not
be entitled to any exemption from the 30% withholding tax (or lower treaty rate)
to    the   extent   of   that   portion    of   REMIC   taxable   income   that
 
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constitutes   an    "excess    inclusion."    See    "Taxation    of    Residual
Certificates--Limitations  on  Offset  or  Exemption of  REMIC  Income."  If the
amounts paid  to  Residual Holders  who  are Non-U.S.  Persons  are  effectively
connected  with the conduct of  a trade or business  within the United States by
such Non-U.S. Persons, 30%  (or lower treaty rate)  withholding will not  apply.
Instead,  the amounts paid  to such Non-U.S.  Persons will be  subject to United
States federal  income tax  at regular  rates.  If 30%  (or lower  treaty  rate)
withholding is applicable, such amounts generally will be taken into account for
purposes  of withholding  only when paid  or otherwise distributed  (or when the
Residual Certificate is  disposed of)  under rules similar  to withholding  upon
disposition   of  debt  instruments  that  have  original  issue  discount.  See
"Tax-Related  Restrictions   on  Transfer   of  Residual   Certificates--Foreign
Investors"  above  concerning the  disregard  of certain  transfers  having "tax
avoidance potential." Investors  who are Non-U.S.  Persons should consult  their
own  tax  advisors regarding  the specific  tax consequences  to them  of owning
Residual Certificates.
 
BACKUP WITHHOLDING
 
    Distributions made on the Regular  Certificates, and proceeds from the  sale
of  the Regular Certificates to or through  certain brokers, may be subject to a
"backup" withholding tax under Code Section 3406 of 20% on "reportable payments"
(including interest distributions, original  issue discount, and, under  certain
circumstances,  principal  distributions) unless  the  Regular Certificateholder
complies with certain reporting  and/or certification procedures, including  the
provision of its taxpayer identification number to the Trustee, its agent or the
broker   who   effected  the   sale  of   the   Regular  Certificate,   or  such
Certificateholder is otherwise an  exempt recipient under applicable  provisions
of  the  Code. Any  amounts  to be  withheld  from distribution  on  the Regular
Certificates would be refunded by the  Internal Revenue Service or allowed as  a
credit against the Regular Certificateholder's federal income tax liability.
 
REPORTING REQUIREMENTS
 
    Reports  of  accrued  interest  and original  issue  discount  will  be made
annually to the Internal Revenue Service and to individuals, estates, non-exempt
and non-charitable trusts, and partnerships who are either holders of record  of
Regular Certificates or beneficial owners who own Regular Certificates through a
broker  or middleman as nominee. All  brokers, nominees and all other non-exempt
holders of record of Regular Certificates (including corporations,  non-calendar
year  taxpayers,  securities  or  commodities  dealers,  real  estate investment
trusts, investment  companies,  common  trust  funds,  thrift  institutions  and
charitable  trusts) may  request such  information for  any calendar  quarter by
telephone or in writing by contacting the person designated in Internal  Revenue
Service  Publication  938  with  respect  to  a  particular  Series  of  Regular
Certificates. Holders through  nominees must request  such information from  the
nominee.  Treasury regulations provide that information necessary to compute the
accrual of any market discount on the Regular Certificates must be furnished for
calendar years beginning after 1990.
 
    The Internal Revenue  Service's Form  1066 has an  accompanying Schedule  Q,
Quarterly  Notice to  Residual Interest Holders  of REMIC Taxable  Income or Net
Loss Allocation. Treasury regulations  require that Schedule  Q be furnished  by
the  REMIC Pool to  each Residual Holder by  the end of  the month following the
close of  each calendar  quarter  (41 days  after the  end  of a  quarter  under
proposed Treasury regulations) in which the REMIC Pool is in existence.
 
    Treasury   regulations   require  that,   in   addition  to   the  foregoing
requirements, information  must  be  furnished quarterly  to  Residual  Holders,
furnished annually, if applicable, to holders of Regular Certificates, and filed
annually  with the Internal Revenue Service  concerning Code Section 67 expenses
(see "Limitations on  Deduction of  Certain Expenses" above)  allocable to  such
holders.  Furthermore,  under such  regulations,  information must  be furnished
quarterly  to  Residual  Holders,  furnished  annually  to  holders  of  Regular
Certificates,  and filed annually  with the Internal  Revenue Service concerning
the percentage of  the REMIC  Pool's assets  meeting the  qualified asset  tests
described above under "Status of REMIC Certificates."
 
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<PAGE>
                FEDERAL INCOME TAX CONSEQUENCES FOR CERTIFICATES
                     AS TO WHICH NO REMIC ELECTION IS MADE
 
STANDARD CERTIFICATES
 
  GENERAL
 
    In  the  event that  no  election is  made  to treat  a  Trust Estate  (or a
segregated pool  of  assets  therein)  with respect  to  a  Series  of  Standard
Certificates  as a REMIC, the Trust Estate will be classified as a grantor trust
under subpart E, Part 1  of subchapter J of the  Code and not as an  association
taxable as a corporation. Where there is no Fixed Retained Yield with respect to
the  Mortgage  Loans underlying  the Certificates  of a  Series, and  where such
Certificates are not designated  as "Stripped Certificates"  the holder of  each
such  Certificate in  such Series  will be treated  as the  owner of  a pro rata
undivided interest  in the  ordinary income  and corpus  portions of  the  Trust
Estate  represented  by  his Standard  Certificate  and will  be  considered the
beneficial owner of a pro rata undivided interest in each of the Mortgage Loans,
subject to the  discussion below under  "Recharacterization of Servicing  Fees."
Accordingly, the holder of a Standard Certificate of a particular Series will be
required  to report on its  federal income tax return its  pro rata share of the
entire income from the Mortgage  Loans represented by his Standard  Certificate,
including  interest at  the coupon rate  on such Mortgage  Loans, original issue
discount (if any), prepayment  fees, assumption fees,  and late payment  charges
received  by the Servicer, in  accordance with such Standard Certificateholder's
method of accounting.  A Standard  Certificateholder generally will  be able  to
deduct  its share of the Servicing Fee and all administrative and other expenses
of the Trust Estate in accordance  with its method of accounting, provided  that
such  amounts are  reasonable compensation for  services rendered  to that Trust
Estate. However,  investors  who are  individuals,  estates or  trusts  who  own
Standard   Certificates,   either   directly  or   indirectly   through  certain
pass-through entities, will  be subject  to limitation with  respect to  certain
itemized  deductions described  in Code  Section 67,  including deductions under
Code Section 212  for the Servicing  Fee and all  such administrative and  other
expenses  of  the Trust  Estate,  to the  extent  that such  deductions,  in the
aggregate, do not exceed two percent of an investor's adjusted gross income.  In
addition,  Code Section 68 provides that itemized deductions otherwise allowable
for a taxable year of  an individual taxpayer will be  reduced by the lesser  of
(i) 3% of the excess, if any, of adjusted gross income over $100,000 ($50,000 in
the  case of a married individual filing a  separate return), or (ii) 80% of the
amount of itemized deductions  otherwise allowable for such  year. As a  result,
such  investors holding Standard Certificates,  directly or indirectly through a
pass-through entity,  may  have  aggregate  taxable  income  in  excess  of  the
aggregate  amount of cash received on such Standard Certificates with respect to
interest at  the  pass-through rate  or  as  discount income  on  such  Standard
Certificates.  In addition, such expenses are not deductible at all for purposes
of computing the  alternative minimum tax,  and may cause  such investors to  be
subject  to significant additional tax liability. Moreover, where there is Fixed
Retained Yield  with  respect to  the  Mortgage  Loans underlying  a  Series  of
Standard  Certificates or where  the servicing fees are  in excess of reasonable
servicing compensation, the transaction  will be subject  to the application  of
the  "stripped bond" and "stripped coupon" rules of the Code, as described below
under  "Stripped  Certificates"  and  "Recharacterization  of  Servicing  Fees,"
respectively.
 
  TAX STATUS
 
    Cadwalader, Wickersham & Taft has advised the Seller that:
 
        1.    A Standard  Certificate  owned by  a  "domestic building  and loan
    association"  within  the  meaning  of  Code  Section  7701(a)(19)  will  be
    considered  to represent "loans...secured  by an interest  in real property"
    within the meaning of Code Section 7701(a)(19)(C)(v), provided that the real
    property  securing  the   Mortgage  Loans  represented   by  that   Standard
    Certificate is of the type described in such section of the Code.
 
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<PAGE>
        2.  A Standard Certificate owned by a financial institution described in
    Code  Section  593(a)  will  be  considered  to  represent  "qualifying real
    property loans" within the meaning of Code Section 593(d)(1), provided  that
    the  real property securing the Mortgage  Loans represented by that Standard
    Certificate is of the type described in such section of the Code.
 
        3.  A Standard Certificate owned by a real estate investment trust  will
    be  considered to represent "real estate  assets" within the meaning of Code
    Section 856(c)(5)(A) to  the extent  that the  assets of  the related  Trust
    Estate  consist of qualified assets, and interest income on such assets will
    be  considered  "interest  on  obligations  secured  by  mortgages  on  real
    property" within the meaning of Code Section 856(c)(3)(B).
 
        4.    A Standard  Certificate owned  by  a REMIC  will be  considered to
    represent an  "obligation (including  any  participation or  certificate  of
    beneficial ownership therein) which is principally secured by an interest in
    real  property"  within the  meaning of  Code  Section 860G(a)(3)(A)  to the
    extent that the  assets of the  related Trust Estate  consist of  "qualified
    mortgages" within the meaning of Code Section 860G(a)(3).
 
    An  issue arises as to whether Buy-Down  Loans may be characterized in their
entirety under the Code provisions cited in the immediately preceding paragraph.
Code Section 593(d)(1)(C) provides that the term "qualifying real property loan"
does not include a loan "to the extent  secured by a deposit in or share of  the
taxpayer."  The application of  this provision to a  Buy-Down Fund is uncertain,
but may require that a  taxpayer's investment in a  Buy-Down Loan be reduced  by
the  Buy-Down Fund. As  to the treatment  of Buy-Down Loans  as "qualifying real
property loans" under Code  Section 593(d)(1) if the  exception of Code  Section
593(d)(1)(C)  is  inapplicable,  as  "loans...secured  by  an  interest  in real
property" under Code  Section 7701(a)(19)(C)(v), as  "real estate assets"  under
Code Section 856(c)(5)(A), and as "obligation[s] . . . principally secured by an
interest  in real property" under Code  Section 860G(a)(3)(A), there is indirect
authority supporting treatment of an investment  in a Buy-Down Loan as  entirely
secured  by real property if the fair market value of the real property securing
the loan exceeds the  principal amount of  the loan at the  time of issuance  or
acquisition,  as  the case  may be.  There  is no  assurance that  the treatment
described above is proper. Accordingly, Standard Certificateholders are urged to
consult their own tax  advisors concerning the effects  of such arrangements  on
the characterization of such Standard Certificateholder's investment for federal
income tax purposes.
 
  PREMIUM AND DISCOUNT
 
    Standard  Certificateholders are advised to  consult with their tax advisors
as to the federal  income tax treatment of  premium and discount arising  either
upon initial acquisition of Standard Certificates or thereafter.
 
    PREMIUM.   The treatment of premium incurred upon the purchase of a Standard
Certificate will  be  determined generally  as  described above  under  "Federal
Income   Tax   Consequences   for  REMIC   Certificates--Taxation   of  Residual
Certificates--Premium."
 
    ORIGINAL ISSUE  DISCOUNT.    The  Internal Revenue  Service  has  stated  in
published  rulings that, in circumstances similar to those described herein, the
original   issue   discount   rules   will   be   applicable   to   a   Standard
Certificateholder's  interest in those Mortgage Loans as to which the conditions
for the  application  of  those  sections  are  met.  Rules  regarding  periodic
inclusion  of  original issue  discount income  are  applicable to  mortgages of
corporations originated after May 27, 1969, mortgages of noncorporate mortgagors
(other than  individuals)  originated  after  July 1,  1982,  and  mortgages  of
individuals  originated after March 2, 1984.  Such original issue discount could
arise by the charging of points by the originator of the mortgages in an  amount
greater than a statutory DE MINIMIS exception, to the extent that the points are
not  currently  deductible  under  applicable Code  provisions  or  are  not for
services provided by the lender. It is generally not anticipated that adjustable
rate Mortgage Loans  will be  treated as  issued with  original issue  discount.
 
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<PAGE>
However, the application of the Proposed Regulations to adjustable rate mortgage
loans  with incentive interest rates or annual or lifetime interest rate caps is
unclear and may result in original issue discount if not further clarified.
 
    Original issue discount must generally be reported as ordinary gross  income
as  it accrues  under a  constant interest  method that  takes into  account the
compounding of interest,  in advance of  the cash attributable  to such  income.
However,  Code Section 1272 provides  for a reduction in  the amount of original
issue discount  includible in  the income  of  a holder  of an  obligation  that
acquires  the obligation after its initial issuance  at a price greater than the
sum of  the original  issue  price and  the  previously accrued  original  issue
discount,  less prior payments of principal. Accordingly, if such Mortgage Loans
acquired by a Standard Certificateholder are  purchased at a price equal to  the
then  unpaid principal amount of such Mortgage Loans, no original issue discount
attributable to  the  difference  between  the  issue  price  and  the  original
principal  amount of  such Mortgage Loans  (I.E., points) will  be includible by
such holder.
 
    MARKET DISCOUNT.  Standard  Certificateholders also will  be subject to  the
market discount rules to the extent that the conditions for application of those
sections  are met. Market discount on the  Mortgage Loans will be determined and
will be reported  as ordinary  income generally  in the  manner described  above
under  "Federal  Income  Tax Consequences  for  REMIC  Certificates--Taxation of
Residual Certificates--Market Discount."
 
    RECHARACTERIZATION OF SERVICING  FEES.  If  the servicing fees  paid to  the
Servicer  were deemed to exceed reasonable servicing compensation, the amount of
such excess  would be  nondeductible under  Code  Section 162  or 212.  In  this
regard, there are no authoritative guidelines for federal income tax purposes as
to  either the maximum  amount of servicing compensation  that may be considered
reasonable in the  context of this  or similar transactions  or whether, in  the
case  of the Standard Certificate,  the reasonableness of servicing compensation
should be determined on a weighted average or loan-by-loan basis. If a  loan-by-
loan  basis  is  appropriate,  the  likelihood  that  such  amount  would exceed
reasonable servicing compensation  as to  some of  the Mortgage  Loans would  be
increased.  Recently issued Internal  Revenue Service guidance  indicates that a
servicing fee in  excess of  reasonable compensation  ("excess servicing")  will
cause  the Mortgage Loans  to be treated  under the "stripped  bond" rules. Such
guidance provides  safe  harbors  for  servicing deemed  to  be  reasonable  and
requires  taxpayers to demonstrate that the value of servicing fees in excess of
such amounts is not greater than the value of the services provided.
 
    Accordingly, if  the  Internal  Revenue  Service's  approach  is  upheld,  a
Servicer  who receives a servicing fee in excess of such amounts would be viewed
as retaining an ownership interest in a portion of the interest payments on  the
Mortgage  Loans.  Under  the  rules  of Code  Section  1286,  the  separation of
ownership of the right  to receive some  or all of the  interest payments on  an
obligation  from the right to  receive some or all  of the principal payments on
the obligation would  result in treatment  of such Mortgage  Loans as  "stripped
coupons"  and "stripped bonds."  Each stripped bond or  stripped coupon could be
considered for this purpose as a  non-interest bearing obligation issued on  the
date  of issue  of the  Standard Certificates,  and the  original issue discount
rules  of  the  Code  would  apply   to  the  holder  thereof.  While   Standard
Certificateholders would still be treated as owners of beneficial interests in a
grantor trust for federal income tax purposes, the corpus of such trust could be
viewed  as excluding the portion of the Mortgage Loans the ownership of which is
attributed to the Servicer, or  as including such portion  as a second class  of
equitable interest. Applicable Treasury regulations treat such an arrangement as
a  fixed investment trust, since the  multiple classes of trust interests should
be treated as merely facilitating direct investments in the trust assets and the
existence of  multiple classes  of  ownership interests  is incidental  to  that
purpose.  In general, such a recharacterization  should not have any significant
effect  upon  the   timing  or  amount   of  income  reported   by  a   Standard
Certificateholder,  except that the income reported  by a cash method holder may
be slightly  accelerated.  See  "Stripped  Certificates"  below  for  a  further
description  of the federal income tax  treatment of stripped bonds and stripped
coupons.
 
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<PAGE>
    In the alternative, the amount, if any, by which the servicing fees paid  to
the Servicer are deemed to exceed reasonable compensation for servicing could be
treated   as   deferred   payments   of   purchase   price   by   the   Standard
Certificateholders to  the Seller  to  purchase its  undivided interest  in  the
Mortgage  Loans. In  such event, the  present value of  such additional payments
might be included in  the Standard Certificateholder's  basis in such  undivided
interests  for  purposes of  determining  whether the  Standard  Certificate was
acquired at  a  discount, at  par,  or at  a  premium. Under  this  alternative,
Standard  Certificateholders may  also be entitled  to a  deduction for unstated
interest with respect to each deferred payment. The Internal Revenue Service may
take the position that  the specific statutory provisions  of Code Section  1286
described  above override the alternative  described in this paragraph. Standard
Certificateholders are advised to  consult their tax advisors  as to the  proper
treatment  of the amounts paid to the  Servicer as set forth herein as servicing
compensation or under either of the alternatives set forth above.
 
  SALE OR EXCHANGE OF STANDARD CERTIFICATES
 
    Upon  sale   or   exchange   of   a   Standard   Certificate,   a   Standard
Certificateholder  will recognize gain  or loss equal  to the difference between
the amount realized on the sale and its aggregate adjusted basis in the Mortgage
Loans and other assets represented by the Standard Certificate. In general,  the
aggregate  adjusted basis will  equal the Standard  Certificateholder's cost for
the Standard  Certificate, increased  by  the amount  of any  income  previously
reported with respect to the Standard Certificate and decreased by the amount of
any  losses previously reported with respect to the Standard Certificate and the
amount of  any distributions  received thereon.  Except as  provided above  with
respect  to  market  discount on  any  Mortgage  Loans, and  except  for certain
financial institutions subject  to the  provisions of Code  Section 582(c),  any
such  gain or loss would be capital gain or loss if the Standard Certificate was
held as a capital asset. The preferential rates applicable to long-term  capital
gains  were eliminated by the  Tax Reform Act of 1986,  but were restored by the
Revenue Reconciliation Act of 1990 with respect to certain individuals.
 
STRIPPED CERTIFICATES
 
  GENERAL
 
    Pursuant to Code Section 1286, the  separation of ownership of the right  to
receive some or all of the principal payments on an obligation from ownership of
the  right  to receive  some  or all  of the  interest  payments results  in the
creation of "stripped bonds"  with respect to  principal payments and  "stripped
coupons"  with respect  to interest payments.  For purposes  of this discussion,
Certificates that are subject  to those rules will  be referred to as  "Stripped
Certificates." The Certificates will be subject to those rules if (i) the Seller
or  any  of its  affiliates  retains (for  its own  account  or for  purposes of
resale), in the form of Fixed Retained Yield or otherwise, an ownership interest
in a portion of the  payments on the Mortgage Loans,  (ii) the Seller or any  of
its  affiliates is treated as having an ownership interest in the Mortgage Loans
to the  extent it  is paid  (or  retains) servicing  compensation in  an  amount
greater  than  reasonable consideration  for servicing  the Mortgage  Loans (see
"Standard Certificates--Recharacterization of  the Servicing  Fees" above),  and
(iii)  a Class of Certificates  are issued in two  or more Classes or Subclasses
representing the right to non-pro-rata percentages of the interest and principal
payments on the Mortgage Loans.
 
    In general, a  holder of a  Stripped Certificate will  be considered to  own
"stripped  bonds" with respect to its pro rata  share of all or a portion of the
principal payments on each Mortgage Loan and/or "stripped coupons" with  respect
to  its pro  rata share of  all or  a portion of  the interest  payments on each
Mortgage Loan,  including  the Stripped  Certificate's  allocable share  of  the
servicing  fees paid  to the  Servicer, to the  extent that  such fees represent
reasonable compensation  for  services  rendered.  See  discussion  above  under
"Standard  Certificates--Recharacterization of Servicing Fees." For this purpose
the servicing fees will be allocated to the Stripped Certificates in  proportion
to  the  respective  offering price  of  each  Class (or  Subclass)  of Stripped
Certificates. The holder of a Stripped Certificate generally will be entitled to
a deduction each year in respect of the servicing fees, as described above under
"Standard Certificates-- General," subject to the limitation described therein.
 
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<PAGE>
    Code Section 1286 treats a stripped  bond or a stripped coupon generally  as
an  obligation  issued at  an  original issue  discount  on the  date  that such
stripped interest is purchased. Although the treatment of Stripped  Certificates
for  federal income tax purposes is not  clear in certain respects at this time,
particularly where  such Stripped  Certificates  are issued  with respect  to  a
Mortgage  Pool  containing variable-rate  Mortgage  Loans, the  Seller  has been
advised by counsel that (i) the Trust Estate will be treated as a grantor  trust
under  subpart E, Part I of  subchapter J of the Code  and not as an association
taxable as a corporation, and (ii)  each Stripped Certificate should be  treated
as  a single installment  obligation for purposes  of calculating original issue
discount and  gain  or loss  on  disposition. This  treatment  is based  on  the
interrelationship of Code Section 1286, Code Sections 1272 through 1275, and the
Proposed  OID  Regulations.  While  under Code  Section  1286  computations with
respect to Stripped  Certificates arguably  should be made  in one  of the  ways
described  below under "Taxation  of Stripped Certificates--Possible Alternative
Characterizations," the Proposed  OID Regulations  state, in  general, that  all
debt  instruments issued in connection with the same transaction must be treated
as a single debt instrument. The  Pooling and Servicing Agreement requires  that
the  Trustee  make  and  report  all  computations  described  below  using this
aggregate approach, unless substantial legal authority requires otherwise.
 
    Furthermore, proposed Treasury regulations issued August 8, 1991 support the
treatment of a Stripped  Certificate as a single  debt instrument issued on  the
date  it is originated for purposes  of calculating any original issue discount.
In addition,  under  these proposed  regulations,  a Stripped  Certificate  that
represents  a right  to payments  of both interest  and principal  may be viewed
either as issued with original issue  discount or market discount (as  described
below),  at a DE MINIMIS original issue  discount, or, presumably, at a premium.
This  treatment  suggests  that  the  interest  component  of  such  a  Stripped
Certificate  would be treated as qualified  periodic interest under the Proposed
OID Regulations. Further, the August 1991 proposed regulations provide that  the
purchaser  of such a  Stripped Certificate will  be required to  account for any
discount as market discount  rather than original issue  discount if either  (i)
the  initial discount  with respect to  the Stripped Certificate  was treated as
zero under the DE MINIMIS rule, or (ii) no more than 100 basis points in  excess
of  reasonable servicing  is stripped off  the related Mortgage  Loans. Any such
market discount would be reportable as described above under "Federal Income Tax
Consequences for  REMIC Certificates--Taxation  of Regular  Certificates--Market
Discount,"  without regard to  the DE MINIMIS rule  therein. Pursuant to Revenue
Procedure 91-49, issued August 8, 1991,  investors using a method of  accounting
inconsistent with the above treatment must change their method of accounting and
request  the  consent  to the  Internal  Revenue  Service to  such  change  on a
statement attached to  their first timely  federal income tax  returned for  the
first tax year ending after August 8, 1991.
 
  STATUS OF STRIPPED CERTIFICATES
 
    No  specific  legal authority  exists  as to  whether  the character  of the
Stripped Certificates, for federal income tax purposes, will be the same as that
of the Mortgage Loans. Although  the issue is not  free from doubt, counsel  has
advised the Seller that Stripped Certificates owned by applicable holders should
be  considered to represent "qualifying real  property loans" within the meaning
of Code  Section 593(d)(1),  "real estate  assets" within  the meaning  of  Code
Section 856(c)(5)(A), "obligation[s] . . . principally secured by an interest in
real   property"  within  the   meaning  of  Code   Section  860G(a)(3)(A),  and
"loans...secured by an  interest in real  property" within the  meaning of  Code
Section  7701(a)(19)(C)(v),  and  interest (including  original  issue discount)
income attributable to Stripped Certificates  should be considered to  represent
"interest  on  obligations secured  by mortgages  on  real property"  within the
meaning of Code Section  856(c)(3)(B), provided that in  each case the  Mortgage
Loans  and  interest on  such  Mortgage Loans  qualify  for such  treatment. The
application of  such  Code  provisions  to  Buy-Down  Loans  is  uncertain.  See
"Standard Certificates--Tax Status" above.
 
  TAXATION OF STRIPPED CERTIFICATES
 
    ORIGINAL  ISSUE DISCOUNT.   Except as described  above under "General," each
Stripped Certificate will be considered to have been issued at an original issue
discount for federal income tax purposes. Original
 
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<PAGE>
issue discount  with respect  to  a Stripped  Certificate  must be  included  in
ordinary  income as  it accrues, in  accordance with a  constant interest method
that takes into account the compounding of  interest, which may be prior to  the
receipt  of the cash attributable to such  income. Based in part on the Proposed
OID Regulations and the  amendments to the original  issue discount sections  of
the Code made by the 1986 Act, counsel has advised the Seller that the amount of
original  issue discount required to be included in  the income of a holder of a
Stripped  Certificate  (referred   to  in   this  discussion   as  a   "Stripped
Certificateholder")  in any  taxable year likely  will be  computed generally as
described   above   under   "Federal   Income   Tax   Consequences   for   REMIC
Certificates--Taxation  of  Regular Certificates--Original  Issue  Discount" and
"--Variable Rate Regular Certificates." However, with the apparent exception  of
a  Stripped  Certificate  issued  with DE  MINIMIS  original  issue  discount as
described above under "General," the issue price of a Stripped Certificate  will
be  the purchase price  paid by each  holder thereof, and  the stated redemption
price at maturity will include the aggregate  amount of the payments to be  made
on the Stripped Certificate to such Stripped Certificateholder, presumably under
the Prepayment Assumption.
 
    If  the Mortgage Loans  prepay at a  rate either faster  or slower than that
under the Prepayment Assumption,  a Stripped Certificateholder's recognition  of
original issue discount will be either accelerated or decelerated and the amount
of  such original issue discount will be either increased or decreased depending
on the  relative interests  in  principal and  interest  on each  Mortgage  Loan
represented by such Stripped Certificateholder's Stripped Certificate. While the
matter  is not free from  doubt, the holder of  a Stripped Certificate should be
entitled in the year that it  becomes certain (assuming no further  prepayments)
that  the  holder will  not  recover a  portion of  its  adjusted basis  in such
Stripped Certificate to  recognize an  ordinary loss  equal to  such portion  of
unrecoverable basis.
 
    As  an alternative to the method described  above, the fact that some or all
of the interest payments with respect  to the Stripped Certificates will not  be
made  if the Mortgage  Loans are prepaid  could lead to  the interpretation that
such interest payments are "contingent" within  the meaning of the Proposed  OID
Regulations. If the rules of the Proposed OID Regulations relating to contingent
payments  apply, treatment of a Stripped Certificate under such rules depends on
whether the aggregate amount of  principal payments, if any,  to be made on  the
Stripped  Certificate  is less  than or  greater  than its  issue price.  If the
aggregate principal payments are greater than  or equal to the issue price,  the
principal  payments would be treated as a separate installment obligation issued
at a price equal  to the purchase  price for the  Stripped Certificate. In  such
case,  original issue discount would be  calculated and accrued under the method
described above without consideration of  the interest payments with respect  to
the  Stripped Certificate. Such payments of  interest would be includible in the
Stripped Certificateholder's  gross income  in  the taxable  year in  which  the
amounts  become fixed. If the aggregate amount  of principal payments to be made
on the  Stripped Certificate  is less  than  its issue  price, each  payment  of
principal  would be treated as a return of basis. Each payment of interest would
be treated as includible in gross income to the extent of the applicable Federal
rate under  Code  Section 1274(d),  as  applied to  the  adjusted basis  of  the
Stripped Certificate, while amounts received in excess of the applicable Federal
rate,  as applied to  the adjusted basis  of the Stripped  Certificate, would be
characterized as a return of basis  until the total amount of interest  payments
treated  as a return of basis equalled the excess of the purchase price over the
aggregate stated principal payments. Any additional interest payments thereafter
would be treated as ordinary income. While not free from doubt, counsel for  the
Seller  believes that  uncertainty as  to the payment  of interest  arising as a
result of the possibility of prepayment  of the Mortgage Loans should not  cause
the  contingent payment  rules under  the Proposed  OID Regulations  to apply to
interest with respect to the Stripped Certificates.
 
    SALE OR EXCHANGE OF STRIPPED CERTIFICATES.   Sale or exchange of a  Stripped
Certificate  prior to  its maturity  will result  in gain  or loss  equal to the
difference,  if   any,   between   the  amount   received   and   the   Stripped
Certificateholder's  adjusted basis  in such Stripped  Certificate, as described
above under "Federal Income Tax Consequences for REMIC Certificates--Taxation of
Regular Certificates--Sale or Exchange of  Regular Certificates." To the  extent
that  a  subsequent  purchaser's purchase  price  is exceeded  by  the remaining
payments on  the  Stripped  Certificates,  such  subsequent  purchaser  will  be
required for federal
 
                                       88
<PAGE>
income  tax purposes  to accrue and  report such  excess as if  it were original
issue discount in the manner described above.  It is not clear for this  purpose
whether the assumed prepayment rate that is to be used in the case of a Stripped
Certificateholder  other than  an original Stripped  Certificateholder should be
the Prepayment Assumption or a new rate  based on the circumstances at the  date
of subsequent purchase.
 
    PURCHASE OF MORE THAN ONE CLASS OF STRIPPED CERTIFICATES.  Where an investor
purchases  more than one Class of Stripped Certificates, it is currently unclear
whether for federal income  tax purposes such  Classes of Stripped  Certificates
should  be treated separately or aggregated  for purposes of the rules described
above.
 
    POSSIBLE  ALTERNATIVE  CHARACTERIZATIONS.    The  characterizations  of  the
Stripped  Certificates discussed above are not the only possible interpretations
of the applicable Code provisions.  For example, the Stripped  Certificateholder
may be treated as the owner of (i) one installment obligation consisting of such
Stripped  Certificate's pro rata share of the payments attributable to principal
on each Mortgage  Loan and a  second installment obligation  consisting of  such
Stripped  Certificate's pro rata share of  the payments attributable to interest
on each Mortgage Loan, (ii) as many stripped bonds or stripped coupons as  there
are  scheduled payments of  principal and/or interest on  each Mortgage Loan, or
(iii) a separate installment obligation for each Mortgage Loan, representing the
Stripped Certificate's pro rata share  of payments of principal and/or  interest
to  be  made with  respect thereto.  Alternatively,  the holder  of one  or more
Classes of Stripped  Certificates may  be treated  as the  owner of  a pro  rata
fractional  undivided interest  in each  Mortgage Loan  to the  extent that such
Stripped Certificate,  or Classes  of Stripped  Certificates in  the  aggregate,
represent  the same  pro rata  portion of  principal and  interest on  each such
Mortgage Loan, and  a stripped bond  or stripped  coupon (as the  case may  be),
treated as an installment obligation or contingent payment obligation, as to the
remainder.
 
    Because of these possible varying characterizations of Stripped Certificates
and   the  resultant   differing  treatment  of   income  recognition,  Stripped
Certificateholders are urged  to consult  their own tax  advisors regarding  the
proper treatment of Stripped Certificates for federal income tax purposes.
 
REPORTING REQUIREMENTS AND BACKUP WITHHOLDING
 
    The  Trustee will furnish,  within a reasonable  time after the  end of each
calendar year, to each Standard Certificateholder or Stripped  Certificateholder
at  any time during such year, such information (prepared on the basis described
above) as  the  Trustee  deems to  be  necessary  or desirable  to  enable  such
Certificateholders to prepare their federal income tax returns. Such information
will  include the amount of original issue discount accrued on Certificates held
by  persons   other  than   Certificateholders  exempted   from  the   reporting
requirements. The amount required to be reported by the Trustee may not be equal
to  the proper  amount of  original issue  discount required  to be  reported as
taxable income by a Certificateholder, other than an original Certificateholder.
The Trustee will  also file such  original issue discount  information with  the
Internal  Revenue Service.  If a Certificateholder  fails to  supply an accurate
taxpayer identification number or  if the Secretary  of the Treasury  determines
that  a  Certificateholder has  not reported  all  interest and  dividend income
required to be shown  on his federal income  tax return, 20% backup  withholding
may  be required in respect of any reportable payments, as described above under
"Federal Income Tax Consequences for REMIC Certificates--Backup Withholding."
 
TAXATION OF CERTAIN FOREIGN INVESTORS
 
    To the extent that a Standard Certificate or Stripped Certificate  evidences
ownership in Mortgage Loans that are issued on or before July 18, 1984, interest
or  original issue discount  paid by the  person required to  withhold tax under
Code Section 1441 or 1442 to nonresident aliens, foreign corporations, or  other
non-U.S.  persons ("foreign  persons") generally will  be subject  to 30% United
States withholding tax, or such lower rate as may be provided for interest by an
applicable tax  treaty.  Accrued  original  issue  discount  recognized  by  the
Standard Certificateholder or Stripped Certificateholder on the sale or exchange
of  such a Certificate  also will be subject  to federal income  tax at the same
rate.
 
                                       89
<PAGE>
    Treasury regulations provide that interest  or original issue discount  paid
by  the  Trustee  or other  withholding  agent  to a  foreign  person evidencing
ownership interest  in  Mortgage  Loans  issued after  July  18,  1984  will  be
"portfolio interest" and will be treated in the manner, and such persons will be
subject  to the same  certification requirements described  above under "Federal
Income Tax  Consequences for  REMIC  Certificates--Taxation of  Certain  Foreign
Investors--Regular Certificates."
 
                              ERISA CONSIDERATIONS
 
GENERAL
 
    The  Employee Retirement Income Security Act  of 1974, as amended ("ERISA"),
imposes certain requirements on those employee benefit plans to which it applies
("Plans") and on those persons who  are fiduciaries with respect to such  Plans.
The  following  is  a  general  discussion  of  such  requirements,  and certain
applicable exceptions to and  administrative exemptions from such  requirements.
For  purposes of this discussion, a person  investing on behalf of an individual
retirement account established under Code Section 408 (an "IRA") is regarded  as
a fiduciary and the IRA as a Plan.
 
    Before purchasing any Certificates, a Plan fiduciary should consult with its
counsel  and determine  whether there  exists any  prohibition to  such purchase
under the requirements of ERISA, whether prohibited transaction exemptions  such
as  PTE 83-1  or any  individual administrative  exemption (as  described below)
applies, including whether the appropriate conditions set forth therein would be
met, or whether  any statutory prohibited  transaction exemption is  applicable,
and further should consult the applicable Prospectus Supplement relating to such
Series of Certificates.
 
CERTAIN REQUIREMENTS UNDER ERISA
 
    GENERAL.   In  accordance with  ERISA's general  fiduciary standards, before
investing in a Certificate a Plan fiduciary should determine whether to do so is
permitted under the governing Plan instruments  and is appropriate for the  Plan
in view of its overall investment policy and the composition and diversification
of  its  portfolio.  A  Plan  fiduciary  should  especially  consider  the ERISA
requirement of investment  prudence and  the sensitivity  of the  return on  the
Certificates  to the rate of principal repayments (including prepayments) on the
Mortgage Loans, as discussed in "Prepayment and Yield Considerations" herein.
 
    PARTIES IN INTEREST/DISQUALIFIED  PERSONS.  Other  provisions of ERISA  (and
corresponding  provisions of  the Code) prohibit  certain transactions involving
the assets of a Plan and persons who have certain specified relationships to the
Plan  (so-called  "parties  in  interest"   within  the  meaning  of  ERISA   or
"disqualified persons" within the meaning of the Code). The Seller, the Servicer
or the Trustee or certain affiliates thereof might be considered or might become
"parties  in interest" or "disqualified persons" with  respect to a Plan. If so,
the acquisition or holding of Certificates by or on behalf of such Plan could be
considered to give  rise to  a "prohibited  transaction" within  the meaning  of
ERISA  and the Code  unless an administrative exemption  described below or some
other exemption is available.
 
    Special caution should be exercised before the assets of a Plan are used  to
purchase a Certificate if, with respect to such assets, the Seller, the Servicer
or  the Trustee  or an affiliate  thereof either: (a)  has investment discretion
with respect to the investment of such assets of such Plan; or (b) has authority
or responsibility to give, or regularly gives, investment advice with respect to
such assets for a fee  and pursuant to an  agreement or understanding that  such
advice  will serve as a  primary basis for investment  decisions with respect to
such assets and  that such  advice will be  based on  the particular  investment
needs of the Plan.
 
    DELEGATION  OF FIDUCIARY DUTY.   Further, if the assets  included in a Trust
Estate were  deemed to  constitute Plan  assets, it  is possible  that a  Plan's
investment in the Certificates might be deemed to constitute a delegation, under
ERISA,  of the duty to manage Plan assets by the fiduciary deciding to invest in
the
 
                                       90
<PAGE>
Certificates, and certain transactions  involved in the  operation of the  Trust
Estate might be deemed to constitute prohibited transactions under ERISA and the
Code. Neither ERISA nor the Code define the term "plan assets."
 
    The  U.S. Department of Labor (the "Department") has issued regulations (the
"Regulations") concerning whether  or not  a Plan's  assets would  be deemed  to
include  an interest  in the  underlying assets  of an  entity (such  as a Trust
Estate) for  purposes of  the  reporting and  disclosure and  general  fiduciary
responsibility  provisions of ERISA,  as well as  for the prohibited transaction
provisions of ERISA  and the  Code, if the  Plan acquires  an "equity  interest"
(such as a Certificate) in such an entity.
 
    Certain  exceptions  are provided  in the  Regulations whereby  an investing
Plan's assets would be deemed merely to include its interest in the Certificates
instead of being deemed to include an interest in the assets of a Trust  Estate.
However,  it cannot  be predicted  in advance  nor can  there be  any continuing
assurance whether such exceptions may be  met, because of the factual nature  of
certain  of the  rules set  forth in  the Regulations.  For example,  one of the
exceptions in the  Regulations states that  the underlying assets  of an  entity
will  not be  considered "plan  assets" if  less than  25% of  the value  of all
classes of equity  interests are  held by  "benefit plan  investors," which  are
defined  as Plans, IRAs,  and employee benefit  plans not subject  to ERISA (for
example, governmental plans),  but this  exception is  tested immediately  after
each  acquisition  of an  equity  interest in  the  entity whether  upon initial
issuance or in the secondary market.
 
ADMINISTRATIVE EXEMPTIONS
 
    INDIVIDUAL   ADMINISTRATIVE   EXEMPTIONS.       Several   underwriters    of
mortgage-backed  securities  have  applied  for  and  obtained  ERISA prohibited
transaction exemptions (each,  an "Underwriter's Exemption")  which are in  some
respects  broader than  Prohibited Transaction  Class Exemption  83-1 (described
below). Such  exemptions can  only apply  to mortgage-backed  securities  which,
among  other conditions,  are sold  in an  offering with  respect to  which such
underwriter serves as the  sole or a  managing underwriter, or  as a selling  or
placement  agent. If  such an Underwriter's  Exemption might be  applicable to a
Series of Certificates,  the related  Prospectus Supplement will  refer to  such
possibility.
 
    Among  the conditions that must be  satisfied for an Underwriter's Exemption
to apply are the following:
 
        (1) The acquisition of Certificates by a Plan is on terms (including the
    price for the Certificates) that  are at least as  favorable to the Plan  as
    they would be in an arm's length transaction with an unrelated party;
 
        (2)  The rights and interests evidenced  by Certificates acquired by the
    Plan are not  subordinated to the  rights and interests  evidenced by  other
    Certificates of the Trust Estate;
 
        (3)  The Certificates acquired by the Plan have received a rating at the
    time of such  acquisition that is  one of the  three highest generic  rating
    categories  from  either  Standard  &  Poors  Corporation  ("S&P"),  Moody's
    Investors Service, Inc.  ("Moody's"), Duff  & Phelps Rating  Co. ("D&P")  or
    Fitch Investors Service, Inc. ("Fitch");
 
        (4)  The Trustee  must not be  an affiliate  of any other  member of the
    Restricted Group (as defined below);
 
        (5) The sum of all payments made  to and retained by the underwriter  in
    connection  with the distribution  of Certificates represents  not more than
    reasonable compensation for  underwriting the Certificates.  The sum of  all
    payments  made to and retained  by the Seller pursuant  to the assignment of
    the Mortgage Loans  to the Trust  Estate represents not  more than the  fair
    market  value of such  Mortgage Loans. The  sum of all  payments made to and
    retained by the Servicer (and any  other servicer) represents not more  than
    reasonable  compensation for  such person's  services under  the Pooling and
    Servicing Agreement and reimbursement  of such person's reasonable  expenses
    in connection therewith; and
 
                                       91
<PAGE>
        (6)  The Plan investing in the  Certificates is an "accredited investor"
    as defined in Rule 501(a)(1) of Regulation D of the Securities and  Exchange
    Commission under the Securities Act of 1933.
 
    The Trust Estate must also meet the following requirements:
 
            (i)  the assets of the Trust Estate must consist solely of assets of
       the type  that  have been  included  in  other investment  pools  in  the
       marketplace;
 
           (ii) certificates in such other investment pools must have been rated
       in  one of the three highest rating  categories of S&P, Moody's, Fitch or
       D&P for  at  least  one year  prior  to  the Plan's  acquisition  of  the
       Certificates; and
 
           (iii)  certificates  evidencing  interests in  such  other investment
       pools must have been purchased by investors other than Plans for at least
       one year prior to any Plan's acquisition of the Certificates.
 
    If the conditions to  an Underwriter's Exemption are  met, whether or not  a
Plan's  assets would be deemed to include  an ownership interest in the Mortgage
Loans  in  a  mortgage  pool,  the  acquisition,  holding  and  resale  of   the
Certificates by Plans would be exempt from the prohibited transaction provisions
of ERISA and the Code.
 
    Moreover,  an  Underwriter's  Exemption  can  provide  relief  from  certain
self-dealing/conflict of interest  prohibited transactions that  may occur if  a
Plan  fiduciary causes a Plan to acquire Certificates in a Trust Estate in which
the fiduciary (or its affiliate) is an obligor on the Mortgage Loans held in the
Trust Estate provided  that, among  other requirements: (i)  in the  case of  an
acquisition  in connection with  the initial issuance  of Certificates, at least
fifty percent of  each class  of Certificates in  which Plans  have invested  is
acquired  by  persons independent  of the  Restricted Group  and at  least fifty
percent of the  aggregate interest in  the Trust Estate  is acquired by  persons
independent  of the Restricted Group (as defined below); (ii) such fiduciary (or
its affiliate) is an obligor  with respect to five percent  or less of the  fair
market  value of  the Mortgage  Loans contained in  the Trust  Estate; (iii) the
Plan's investment  in Certificates  of  any Class  does not  exceed  twenty-five
percent  of all of the Certificates of that Class outstanding at the time of the
acquisition and (iv) immediately after the acquisition no more than  twenty-five
percent  of  the assets  of the  Plan with  respect  to which  such person  is a
fiduciary are invested in Certificates representing  an interest in one or  more
trusts containing assets sold or served by the same entity.
 
    An  Underwriter's Exemption does not apply to Plans sponsored by the Seller,
the underwriter specified in the applicable Prospectus Supplement, the  Trustee,
the  Servicer, any obligor with respect to  Mortgage Loans included in the Trust
Estate  constituting  more  than  five  percent  of  the  aggregate  unamortized
principal  balance of the assets  in the Trust Estate,  or any affiliate of such
parties (the "Restricted Group").
 
    PTE  83-1.    Prohibited  Transaction  Class  Exemption  83-1  for   Certain
Transactions  Involving  Mortgage Pool  Investment  Trusts ("PTE  83-1") permits
certain transactions  involving the  creation,  maintenance and  termination  of
certain  residential mortgage pools  and the acquisition  and holding of certain
residential mortgage pool pass-through certificates by Plans, whether or not the
Plan's assets would be deemed to include an ownership interest in the  mortgages
in  such mortgage pools, and whether or not such transactions would otherwise be
prohibited under ERISA.
 
    The term "mortgage pool pass-through certificate" is defined in PTE 83-1  as
"a  certificate  representing a  beneficial undivided  fractional interest  in a
mortgage pool and  entitling the holder  of such a  certificate to  pass-through
payment  of principal and interest from the pooled mortgage loans, less any fees
retained by the pool sponsor."  It appears that, for  purposes of PTE 83-1,  the
term  "mortgage pool pass-through certificate" would include Certificates issued
in a single Class or in multiple Classes that evidence the beneficial  ownership
of  both a  specified percentage  of future  interest payments  (after permitted
deductions) and a specified percentage of  future principal payments on a  Trust
Estate.
 
                                       92
<PAGE>
    However,  it appears that PTE  83-1 does or might  not apply to the purchase
and holding of (a) Certificates that evidence the beneficial ownership only of a
specified percentage of future interest payments (after permitted deductions) on
a Trust Estate or only of a specified percentage of future principal payments on
a Trust Estate, (b) Residual Certificates, (c) Certificates evidencing ownership
interests in a Trust Estate which includes Mortgage Loans secured by multifamily
residential properties or shares issued by cooperative housing corporations,  or
(d) Certificates which are subordinated to other Classes of Certificates of such
Series.  Accordingly, unless exemptive relief other than PTE 83-1 applies, Plans
should not purchase any such Certificates.
 
    PTE 83-1 sets forth  "general conditions" and  "specific conditions" to  its
applicability.  Section  II  of  PTE  83-1  sets  forth  the  following  general
conditions to the application of the exemption: (i) the maintenance of a  system
of  insurance or other protection for the  pooled mortgage loans or the property
securing such loans, and for indemnifying certificateholders against  reductions
in  pass-through payments due  to property damage or  defaults in loan payments;
(ii) the  existence of  a pool  trustee  who is  not an  affiliate of  the  pool
sponsor;  and  (iii) a  requirement that  the sum  of all  payments made  to and
retained by the pool sponsor, and all  funds inuring to the benefit of the  pool
sponsor  as a result of the administration  of the mortgage pool, must represent
not more  than  adequate  consideration  for selling  the  mortgage  loans  plus
reasonable  compensation for services provided by  the pool sponsor to the pool.
The system  of insurance  or protection  referred to  in clause  (i) above  must
provide  such protection and indemnification  up to an amount  not less than the
greater of one percent of the  aggregate unpaid principal balance of the  pooled
mortgages  or the unpaid principal balance of  the largest mortgage in the pool.
It should be noted that in promulgating PTE 83-1 (and a predecessor  exemption),
the  Department did not have  under its consideration interests  in pools of the
exact nature as some of the Certificates described herein.
 
EXEMPT PLANS
 
    Employee benefit plans which are  governmental plans (as defined in  Section
3(32) of ERISA), and certain church plans (as defined in Section 3(33) of ERISA)
are  not subject to ERISA requirements and  assets of such plans may be invested
in Certificates without regard to  the ERISA considerations described above  but
such  plans may  be subject  to the provisions  of other  applicable federal and
state law.
 
UNRELATED BUSINESS TAXABLE INCOME--RESIDUAL CERTIFICATES
 
    The purchase  of  a  Residual  Certificate  by  any  employee  benefit  plan
qualified  under Code Section 401(a) and exempt from taxation under Code Section
501(a), including most  varieties of ERISA  Plans, may give  rise to  "unrelated
business  taxable  income"  as  described in  Code  Sections  511-515  and 860E.
Further,  prior  to  the  purchase  of  Residual  Certificates,  a   prospective
transferee  may be required to  provide an affidavit to  a transferor that it is
not, nor is it purchasing a  Residual Certificate on behalf of, a  "Disqualified
Organization,"  which term as defined above includes certain tax-exempt entities
not subject to Code Section 511 such as certain governmental plans, as discussed
above under the caption "Certain Federal Income Tax Consequences--Federal Income
Tax Consequences for REMIC Certificates--Taxation of Residual
Certificates--Tax-Related Restrictions on Transfer of Residual
Certificates--Disqualified Organizations."
 
    DUE TO THE COMPLEXITY OF THESE RULES AND THE PENALTIES IMPOSED UPON  PERSONS
INVOLVED IN PROHIBITED TRANSACTIONS, IT IS PARTICULARLY IMPORTANT THAT POTENTIAL
INVESTORS  WHO ARE  PLAN FIDUCIARIES  CONSULT WITH  THEIR COUNSEL  REGARDING THE
CONSEQUENCES UNDER ERISA OF THEIR ACQUISITION AND OWNERSHIP OF CERTIFICATES.
 
    THE SALE OF CERTIFICATES TO A PLAN IS IN NO RESPECT A REPRESENTATION BY  THE
SELLER  OR THE  APPLICABLE UNDERWRITER THAT  THIS INVESTMENT  MEETS ALL RELEVANT
LEGAL REQUIREMENTS  WITH  RESPECT  TO  INVESTMENTS BY  PLANS  GENERALLY  OR  ANY
PARTICULAR  PLAN, OR THAT THIS INVESTMENT  IS APPROPRIATE FOR PLANS GENERALLY OR
ANY PARTICULAR PLAN.
 
                                       93
<PAGE>
                                LEGAL INVESTMENT
 
    Except for Standard  Certificates which  are not rated,  as discussed  below
under  "Rating", the  Certificates other than  Residual Certificates  (and if so
specified in the related Prospectus Supplement, the Residual Certificates)  will
constitute  "mortgage related securities" for purposes of the Secondary Mortgage
Market Enhancement Act of 1984 (the "Enhancement Act") and as such will be legal
investments  for  persons,  trusts,  corporations,  partnerships,  associations,
business   trusts  and   business  entities   (including  but   not  limited  to
state-chartered savings banks, commercial  banks, savings and loan  associations
and  insurance  companies, as  well as  trustees  and state  government employee
retirement systems) created pursuant to or existing under the laws of the United
States or of  any state  (including the District  of Columbia  and Puerto  Rico)
whose  authorized investments are subject to state regulation to the same extent
that, under applicable law, obligations issued by or guaranteed as to  principal
and  interest  by the  United States  or any  agency or  instrumentality thereof
constitute legal investments for such entities. Pursuant to the Enhancement Act,
a number of states enacted legislation, on or before the October 3, 1991 cut-off
for such enactments, limiting to varying extents the ability of certain entities
(in particular insurance companies) to invest in mortgage related securities, in
most cases by  requiring the  affected investors  to rely  solely upon  existing
state  law, and not the Enhancement  Act. Accordingly, the investors affected by
such legislation will be  authorized to invest in  the Certificates only to  the
extent provided in such legislation.
 
    The Enhancement Act 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
with  mortgage related  securities without  limitation as  to the  percentage of
their assets represented thereby, federal  credit unions may invest in  mortgage
related  securities, and national banks may purchase mortgage related securities
for their own account without regard to the limitations generally applicable  to
investment  securities set forth  in 12 U.S.C. Section  24 (Seventh), subject in
each case to such regulations as the applicable federal regulatory authority may
prescribe. In  this connection,  federal credit  unions should  review  National
Credit  Union  Administration 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.
The National Credit Union Administration  has adopted rules, effective  December
2,  1991, that prohibit federal credit unions from investing in certain mortgage
related  securities  such  as  the   Residual  Certificates  and  the   Stripped
Certificates, except under limited circumstances.
 
    All  depository institutions  considering an investment  in the Certificates
should review the "Supervisory Policy Statement on Securities Activities"  dated
January  28, 1992 (the "Policy Statement") of the Federal Financial Institutions
Examination Council. The Policy Statement, which  has been adopted by the  Board
of  Governors  of  the Federal  Reserve  System, the  Federal  Deposit Insurance
Corporation,  the  Comptroller  of  the  Currency  and  the  Office  of   Thrift
Supervision, effective February 10, 1992, prohibits depository institutions from
investing  in certain "high-risk mortgage securities" (including securities such
as certain  series  and  classes  of the  Certificates),  except  under  limited
circumstances,  and  sets  forth  certain  investment  practices  deemed  to  be
unsuitable for regulated institutions.
 
    Institutions whose  investment  activities  are  subject  to  regulation  by
federal  or state authorities should review policies and guidelines adopted from
time to time by such authorities  before purchasing any of the Certificates,  as
certain  Series or Classes (in particular,  Stripped Certificates) may be deemed
unsuitable investments, or may otherwise  be restricted, under such policies  or
guidelines (in certain instances irrespective of the Enhancement Act).
 
    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, provisions which
may restrict or
 
                                       94
<PAGE>
prohibit  investment  in   securities  which  are   not  "interest-bearing"   or
"income-paying," and, with regard to any Certificates issued in book-entry form,
provisions  which may restrict  or prohibit investments  in securities which are
issued in book-entry form.
 
    All investors should consult  with their own  legal advisors in  determining
whether  and to  what extent the  Certificates constitute  legal investments for
such investors.
 
                              PLAN OF DISTRIBUTION
 
    The Certificates are being offered hereby  in Series through one or more  of
the  methods  described below.  The  applicable Prospectus  Supplement  for each
Series will describe the method of  offering being utilized for that Series  and
will  state the public offering or purchase  price of each Class of Certificates
of such Series, or the method by which  such price is to be determined, and  the
net proceeds to the Seller from such sale.
 
    The  Certificates will be offered through the following methods from time to
time and  offerings may  be made  concurrently through  more than  one of  these
methods  or  an offering  of a  particular  Series of  Certificates may  be made
through a combination of two or more of these methods:
 
        1.  By negotiated firm commitment underwriting and public re-offering by
    underwriters specified in the applicable Prospectus Supplement;
 
        2.  By placements by the Seller with investors through dealers; and
 
        3.  By direct placements by the Seller with investors.
 
    If underwriters are used  in a sale of  any Certificates, such  Certificates
will  be acquired by  the 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  to be
determined at the  time of  sale or  at the  time of  commitment therefor.  Firm
commitment  underwriting  and  public  reoffering by  underwriters  may  be done
through underwriting syndicates or through one  or more firms acting alone.  The
specific managing underwriter or underwriters, if any, with respect to the offer
and  sale of a particular Series of Certificates  will be set forth on the cover
of the Prospectus Supplement  applicable to such Series  and the members of  the
underwriting syndicate, if any, will be named in such Prospectus Supplement. The
Prospectus  Supplement will describe any discounts and commissions to be allowed
or paid  by  the  Seller  to the  underwriters,  any  other  items  constituting
underwriting  compensation and  any discounts and  commissions to  be allowed or
paid to the  dealers. The  obligations of the  underwriters will  be subject  to
certain  conditions precedent.  The underwriters with  respect to a  sale of any
Class of Certificates will be obligated to purchase all such Certificates if any
are purchased. The Seller  and PHMC will  indemnify the applicable  underwriters
against  certain civil  liabilities, including liabilities  under the Securities
Act of 1933, as amended (the "Act").
 
    The Prospectus Supplement with respect to any Series of Certificates offered
other than through underwriters will contain information regarding the nature of
such offering  and any  agreements to  be entered  into between  the Seller  and
dealers and/or the Seller and purchasers of Certificates of such Series.
 
    Purchasers  of Certificates, including dealers,  may, depending on the facts
and circumstances of such purchases, be  deemed to be "underwriters" within  the
meaning   of  the  Act  in  connection  with  reoffers  and  sales  by  them  of
Certificates. Certificateholders  should consult  with their  legal advisors  in
this regard prior to any such reoffer or sale.
 
    If   specified  in  the  Prospectus  Supplement  relating  to  a  Series  of
Certificates, the Seller or  any affiliate thereof may  purchase some or all  of
one  or more  Classes of  Certificates of  such Series  from the  underwriter or
underwriters at a price  specified or described  in such Prospectus  Supplement.
Such purchaser may thereafter from time to time offer and sell, pursuant to this
Prospectus,  some or all of such Certificates so purchased directly, through one
or more  underwriters to  be designated  at the  time of  the offering  of  such
Certificates  or through dealers acting as agent and/or principal. Such offering
may be restricted in the matter
 
                                       95
<PAGE>
specified in such Prospectus  Supplement. Such transactions  may be effected  at
market  prices prevailing at the time of  sale, at negotiated prices or at fixed
prices. The underwriters and dealers participating in such purchaser's  offering
of  such  Certificates  may receive  compensation  in the  form  of underwriting
discounts or  commissions  from such  purchaser  and such  dealers  may  receive
commissions  from the investors  purchasing such Certificates  for whom they may
act as agent (which discounts or commissions will not exceed those customary  in
those  types  of transactions  involved). Any  dealer  that participates  in the
distribution of such Certificates  may be deemed to  be an "underwriter"  within
the  meaning of  the Act,  and any  commissions and  discounts received  by such
dealer and any profit on the resale of such Certificates by such dealer might be
deemed to be underwriting discounts and commissions under the Act.
 
    One  or  more  affiliates  of   the  Seller  and  the  Servicer,   including
Prudential-Bache Securities Inc. (which conducts its corporate, governmental and
institutional business under the name Prudential-Bache Capital Funding), may act
as  underwriter or dealer with  respect to Certificates of  any Series. Any such
affiliate will be identified in the applicable Prospectus Supplement.
 
                                 LEGAL MATTERS
 
    Certain legal matters  will be  passed upon  for the  Seller by  Cadwalader,
Wickersham  & Taft, New York, New York and for any underwriters by Brown & Wood,
New York, New York.
 
                                     RATING
 
    It is  a condition  to the  issuance of  the Stripped  Certificates and  the
Multi-Class  Certificates of  any Series that  they be  rated in one  of the two
highest categories by at least one  Rating Agency. Standard Certificates may  or
may not be rated by a Rating Agency.
 
    A  securities rating is not a recommendation to buy, sell or hold securities
and may be subject to revision or withdrawal at any time by the assigning Rating
Agency. Each securities rating  should be evaluated  independently of any  other
rating.
 
                                       96
<PAGE>
                        INDEX OF SIGNIFICANT DEFINITIONS
 
<TABLE>
<CAPTION>
TERM                                                                         PAGE
- ---------------------------------------------------------------------------  ----
<S>                                                                          <C>
Aggregate Losses...........................................................   33
Assumed Reinvestment Rate..................................................   32
Balloon Loan...............................................................   15
Balloon Period.............................................................   15
Buy-Down Fund..............................................................   15
Buy-Down Loans.............................................................   15
Certificate Account........................................................   48
Certificates...............................................................    1
Class......................................................................    1
Code.......................................................................   11
Compound Interest Certificates.............................................   24
Cross-Over Date............................................................   28
Curtailment Interest Shortfall.............................................   25
Curtailments...............................................................   24
Cut-Off Date...............................................................    8
Depository.................................................................   48
Determination Date.........................................................   24
Distributable Amount.......................................................   24
Distribution Date..........................................................    8
Due Date...................................................................   13
Due Period.................................................................   31
Eligible Investments.......................................................   35
ERISA......................................................................   11
FDIC.......................................................................   48
FHLMC......................................................................   14
Fixed Retained Yield.......................................................    9
FNMA.......................................................................   14
Initial Deposit............................................................   34
Interest Rate..............................................................    1
Last Scheduled Distribution Date...........................................   33
Late Payment...............................................................   25
Late Payment Period........................................................   25
Liquidation Proceeds.......................................................   49
Loan-to-Value Ratio........................................................   13
Mortgage Interest Rate.....................................................    9
Mortgage Loans.............................................................    1
Mortgage Notes.............................................................   12
Mortgaged Properties.......................................................   12
Mortgages..................................................................   12
Multi-Class Certificate Distribution Amount................................   31
Multi-Class Certificates...................................................    1
Net Foreclosure Profits....................................................   26
Net Mortgage Interest Rate.................................................    9
OTS........................................................................   65
Payment Deficiencies.......................................................   33
Pass-Through Rate..........................................................    9
Percentage Certificates....................................................   22
Periodic Advances..........................................................   10
PHMC.......................................................................    1
PMCC.......................................................................   42
Pool Distribution Amount...................................................   26
Pool Scheduled Principal Balance...........................................   28
</TABLE>
 
                                       97
<PAGE>
<TABLE>
<CAPTION>
TERM                                                                         PAGE
- ---------------------------------------------------------------------------  ----
<S>                                                                          <C>
Pool Value.................................................................   32
Pool Value Group...........................................................   32
Pooling and Servicing Agreement............................................    7
Prepayment Interest Shortfall..............................................   25
Prudential Insurance.......................................................    7
Rating Agency..............................................................   11
Record Date................................................................    9
Registration Statement.....................................................    2
Regular Certificateholder..................................................   69
Regular Certificates.......................................................   22
REMIC......................................................................    1
Residual Certificates......................................................   22
Scheduled Principal........................................................   24
Scheduled Principal Balance................................................   25
Seller.....................................................................    1
Senior Certificates........................................................    1
Senior Class...............................................................   24
Senior Class Carryover Shortfall...........................................   27
Senior Class Distributable Amount..........................................   24
Senior Class Distribution Amount...........................................   28
Senior Class Principal Portion.............................................   24
Senior Class Pro Rata Share................................................   27
Senior Class Shortfall.....................................................   27
Senior Class Shortfall Accruals............................................   27
Series.....................................................................    1
Servicer...................................................................    1
Servicing Fee..............................................................    9
Shifting Interest Certificate..............................................   23
Special Distributions......................................................   33
Special Hazard Loss Amount.................................................   37
Special Hazard Mortgage Loan...............................................   36
Special Hazard Termination Date............................................   36
Specified Subordination Reserve Fund Balance...............................   34
Spread.....................................................................   31
Standard Certificates......................................................    1
Standard Hazard Insurance Policy...........................................   15
Stated Amount..............................................................    1
Stripped Certificates......................................................    1
Subclass...................................................................    1
Subordinated Amount........................................................    9
Subordinated Certificates..................................................    1
Subordinated Class Distributable Amount....................................   25
Subordinated Class Principal Portion.......................................   25
Subordinated Class Pro Rata Share..........................................   27
Subordination Reserve Fund.................................................   10
Subsidy Account............................................................   14
Subsidy Loans..............................................................   14
Treasury Regulations.......................................................   17
Trust Estate...............................................................    1
Trustee....................................................................   60
UCC........................................................................   62
Unpaid Interest Shortfall..................................................   28
Voting Interests...........................................................   57
</TABLE>
 
                                       98
<PAGE>
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    NO  DEALER,  SALESMAN  OR  OTHER  PERSON HAS  BEEN  AUTHORIZED  TO  GIVE ANY
INFORMATION OR TO MAKE ANY REPRESENTATION NOT CONTAINED IN THIS SUPPLEMENT,  THE
PROSPECTUS SUPPLEMENT OR THE PROSPECTUS, AND, IF GIVEN OR MADE, SUCH INFORMATION
OR  REPRESENTATION MUST  NOT BE  RELIED UPON  AS HAVING  BEEN AUTHORIZED  BY THE
SELLER OR BY THE UNDERWRITER. THIS SUPPLEMENT, THE PROSPECTUS SUPPLEMENT AND THE
PROSPECTUS DO NOT CONSTITUTE AN OFFER TO SELL, OR A SOLICITATION OF AN OFFER  TO
BUY, ANY SECURITIES OTHER THAN THE SECURITIES OFFERED HEREBY NOR AN OFFER TO ANY
PERSON  IN ANY STATE OR OTHER JURISDICTION IN WHICH IT WOULD BE UNLAWFUL TO MAKE
SUCH  OFFER  OR  SOLICITATION  IN  SUCH  JURISDICTION.  THE  DELIVERY  OF   THIS
SUPPLEMENT,  THE PROSPECTUS SUPPLEMENT  AND THE PROSPECTUS AT  ANY TIME DOES NOT
IMPLY THAT INFORMATION  HEREIN IS  CORRECT AS OF  ANY TIME  SUBSEQUENT TO  THEIR
RESPECTIVE DATES.
                             ---------------------
 
                               TABLE OF CONTENTS
                                   SUPPLEMENT
 
<TABLE>
<CAPTION>
                                                                           PAGE
                                                                           -----
<S>                                                                        <C>
General..................................................................   S1-3
Risk Factors and Special Considerations..................................   S1-3
Description of the Certificates..........................................   S1-6
Description of the Mortgage Loans........................................   S1-9
Origination, Delinquency and Foreclosure Experience......................  S1-16
Restrictions on Transfer of the Class A-10 Certificates..................  S1-20
Historical Prepayments...................................................  S1-20
Sensitivity of the Pre-Tax Yield and Weighted Average Life of the Class
  A-10 Certificates......................................................  S1-21
Certain Federal Income Tax Consequences..................................  S1-22
Underwriting.............................................................  S1-23
Secondary Market.........................................................  S1-23
ERISA Considerations.....................................................  S1-23
Legal Investment.........................................................  S1-24
Legal Matters............................................................  S1-24
Use of Proceeds..........................................................  S1-24
Ratings..................................................................  S1-25
Incorporation of Certain Information by Reference........................  S1-25
                             PROSPECTUS SUPPLEMENT
Table of Contents........................................................    S-3
Summary Information......................................................    S-4
Description of the Certificates..........................................   S-18
Description of the Mortgage Loans........................................   S-43
Origination, Delinquency and Foreclosure Experience......................   S-50
Prepayment and Yield Considerations......................................   S-54
Pooling and Servicing Agreement..........................................   S-60
Federal Income Tax Considerations........................................   S-62
ERISA Considerations.....................................................   S-63
Legal Investment.........................................................   S-65
Secondary Market.........................................................   S-65
Underwriting.............................................................   S-65
Legal Matters............................................................   S-66
Use of Proceeds..........................................................   S-66
Ratings..................................................................   S-66
Index of Significant Prospectus Supplement
  Definitions............................................................   S-67
                                   PROSPECTUS
Reports..................................................................      2
Additional Information...................................................      2
Table of Contents........................................................      3
Summary of Prospectus....................................................      7
The Trust Estates........................................................     12
Description of the Certificates..........................................     21
Credit Support...........................................................     33
Prepayment and Yield Considerations......................................     38
The Seller...............................................................     41
PHMC.....................................................................     42
Use of Proceeds..........................................................     48
Servicing of the Mortgage Loans..........................................     48
The Pooling and Servicing Agreement......................................     57
Certain Legal Aspects of the Mortgage Loans..............................     60
Certain Federal Income Tax Consequences..................................     66
ERISA Considerations.....................................................     90
Legal Investment.........................................................     92
Plan of Distribution.....................................................     93
Legal Matters............................................................     94
Rating...................................................................     94
Index of Significant Definitions.........................................     95
</TABLE>
 
                              THE PRUDENTIAL HOME
                              MORTGAGE SECURITIES
                                 COMPANY, INC.
 
                                     SELLER
 
                             MORTGAGE PASS-THROUGH
                          CERTIFICATES, SERIES 1992-13
 
                              -------------------
 
                                   SUPPLEMENT
 
                              -------------------
 
                                VARIABLE RATE(1)
                            CLASS A-10 CERTIFICATES
                      (1)ON THE CLASS A-10 NOTIONAL AMOUNT
 
                            PAINEWEBBER INCORPORATED
 
                                 APRIL 18, 1996
 
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