NORWEST ASSET SEC CORP MORT PASS THR CERT SER 1999-16 TRUST
8-K, 1999-07-26
ASSET-BACKED SECURITIES
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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT

                     PURSUANT TO SECTION 13 OR 15(D) OF THE

                         SECURITIES EXCHANGE ACT OF 1934

Date of Report: May 28, 1999
(Date of earliest event reported)

Commission File No. 333-65481



                      Norwest Asset Securities Corporation
- --------------------------------------------------------------------------------




               Delaware                                 52-1972128
- -----------------------------------------   ------------------------------------
        (State of Incorporation)            (I.R.S. Employer Identification No.)



7485 New Horizon Way, Frederick, Maryland                      21703
- --------------------------------------------------------------------------------
 Address of principal executive offices                      (Zip Code)




                                 (301) 846-8881
- --------------------------------------------------------------------------------
               Registrant's Telephone Number, including area code





- --------------------------------------------------------------------------------
         (Former name, former address and former fiscal year, if changed
                               since last report)

<PAGE>

ITEM 5. OTHER EVENTS

On May 28, 1999, Norwest Asset Securities  Corporation,  a Delaware  corporation
(the "Registrant"),  sold Mortgage  Pass-Through  Certificates,  Series 1999-16,
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,  Class A-11,  Class A-12,  Class A-13,  Class
A-14,  Class A-R,  Class A-LR,  Class B-1, Class B-2 and Class B-3 (the "Offered
Certificates"),    having   an   aggregate   original   principal   balance   of
$297,262,200.00.  The Offered Certificates were issued pursuant to a Pooling and
Servicing  Agreement,  dated as of May 28, 1999,  among the Registrant,  Norwest
Bank Minnesota,  National Association, as master servicer (the "Master Servicer"
or "Norwest Bank") and First Union National Bank, as trustee (the  "Agreement"),
a  copy  of  which  is  filed  as  an  exhibit  hereto.   Mortgage  Pass-Through
Certificates,  Series  1999-16,  Class A-PO  Certificates,  having an  aggregate
initial principal balance of $649,468.62, and Class B-4, Class B-5 and Class B-6
Certificates,  having an aggregate  initial  principal  balance of $2,251,549.92
(the  "Private  Class  B  Certificates"   and,  together  with  the  Class  A-PO
Certificates and the Offered Certificates, the "Certificates"), were also issued
pursuant to the Agreement.

As of the date of  initial  issuance,  the  Offered  Certificates  evidenced  an
approximate  99.03%  undivided  interest in a trust fund (the  "Trust  Estate"),
consisting principally of a pool of fixed interest rate,  conventional,  monthly
pay,  fully-amortizing,  one-to  four-family  residential  first mortgage loans,
other than the Fixed  Retained  Yield (as defined in the  Agreement),  which may
include loans secured by shares issued by cooperative housing corporations.  The
remaining  undivided  interests in the Trust  Estate are  evidenced by the Class
A-PO and Private  Class B  Certificates.  Distributions  on the Private  Class B
Certificates are  subordinated to distributions on the Offered  Certificates and
the Class A-PO Certificates.

Interest on the Offered  Certificates  will be distributed on each  Distribution
Date (as defined in the Agreement).  Monthly  distributions  in reduction of the
principal  balance of the Offered  Certificates will be allocated to the Offered
Certificates  in  accordance  with the  priorities  set forth in the  Agreement.
Distributions  of  interest  and  in  reduction  of  principal  balance  on  any
Distribution Date will be made to the extent that the Pool  Distribution  Amount
is sufficient therefor.

An  election  will be made to treat the Trust  Estate as two REMICs for  federal
income  tax  purposes   (the   "Upper-Tier   REMIC"  and   "Lower-Tier   REMIC,"
respectively).  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,  Class A-11, Class A-12, Class
A-13,  Class A-14, Class A-PO, Class B-1, Class B-2, Class B-3, Class B-4, Class
B-5 and Class B-6  Certificates  will be treated as "regular  interests"  in the
Upper-Tier REMIC and the Class A-R and Class A-LR  Certificates  will be treated
as the  "residual  interests"  in the  Upper-Tier  REMIC and  Lower-Tier  REMIC,
respectively.

<PAGE>

ITEM 7. FINANCIAL STATEMENTS AND EXHIBITS

(c) Exhibits

Item 601(a)
of Regulation S-K
EXHIBIT NO.                    DESCRIPTION
- -----------                    -----------
(EX-4)                         Pooling and Servicing Agreement,  dated as of May
                               28,  1999,   among   Norwest   Asset   Securities
                               Corporation,  Norwest  Bank  Minnesota,  National
                               Association  and First Union  National  Bank,  as
                               trustee.

<PAGE>

Pursuant  to the  requirements  of the  Securities  Exchange  Act of  1934,  the
registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.


                                           NORWEST ASSET SECURITIES CORPORATION

May 28, 1999


                                           Alan S. McKenney
                                           Vice President

<PAGE>

                                INDEX TO EXHIBITS

                                                                 Paper (P) or
EXHIBIT NO.   DESCRIPTION                                        ELECTRONIC (E)
- -----------   -----------                                        --------------

(EX-4)        Pooling and Servicing Agreement, dated as of May   E
              28, 1999 among Norwest Asset Securities
              Corporation, Norwest Bank Minnesota, National
              Association and First Union National Bank, as
              trustee.





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




                      NORWEST ASSET SECURITIES CORPORATION


                                    (Seller)

                                       and

                  NORWEST BANK MINNESOTA, NATIONAL ASSOCIATION

                                (Master Servicer)

                                       and

                            FIRST UNION NATIONAL BANK

                                    (Trustee)

                         POOLING AND SERVICING AGREEMENT

                            Dated as of May 28, 1999

                                 $300,163,218.54

                       Mortgage Pass-Through Certificates
                                 Series 1999-16




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




<PAGE>




                                TABLE OF CONTENTS

                                                                            Page


                                    ARTICLE I

                                   DEFINITIONS

Section 1.01  Definitions....................................................
Section 1.02  Acts of Holders...............................................
Section 1.03  Effect of Headings and Table of Contents......................
Section 1.04  Benefits of Agreement.........................................


                                   ARTICLE II

                          CONVEYANCE OF MORTGAGE LOANS;
                      ORIGINAL ISSUANCE OF THE CERTIFICATES

Section 2.01  Conveyance of Mortgage Loans...................................
Section 2.02  Acceptance by Trustee..........................................
Section 2.03  Representations and Warranties of the Master Servicer and
               the Seller....................................................
Section 2.04  Execution and Delivery of Certificates.........................
Section 2.05  Designation of Certificates; Designation of Startup Day
               and Latest Possible Maturity Date............................


                                   ARTICLE III

                  ADMINISTRATION OF THE TRUST ESTATE: SERVICING
                              OF THE MORTGAGE LOANS

Section 3.01  Certificate Account...........................................
Section 3.02  Permitted Withdrawals from the Certificate Account............
Section 3.03  Advances by Master Servicer and Trustee.......................
Section 3.04  Trustee to Cooperate; Release of Owner Mortgage Loan
               Files........................................................
Section 3.05  Reports to the Trustee; Annual Compliance Statements..........
Section 3.06  Title, Management and Disposition of Any REO Mortgage
               Loan.........................................................
Section 3.07  Amendments to Servicing Agreements, Modification of
               Standard Provisions..........................................
Section 3.08  Oversight of Servicing........................................
Section 3.09  Termination and Substitution of Servicing Agreements..........
Section 3.10  Application of Net Liquidation Proceeds.......................
Section 3.11  Act Reports...................................................


                                   ARTICLE IV

                    DISTRIBUTIONS IN RESPECT OF CERTIFICATES;
                         PAYMENTS TO CERTIFICATEHOLDERS;
                             STATEMENTS AND REPORTS

Section 4.01  Distributions.................................................
Section 4.02  Allocation of Realized Losses.................................
Section 4.03  Paying Agent..................................................
Section 4.04  Statements to Certificateholders; Report to the Trustee
               and the Seller...............................................
Section 4.05  Reports to Mortgagors and the Internal Revenue Service........
Section 4.06  Calculation of Amounts; Binding Effect of Interpretations
               and Actions of Master Servicer...............................
Section 4.07  Determination of LIBOR........................................


                                    ARTICLE V

                                THE CERTIFICATES

Section 5.01  The Certificates...............................................
Section 5.02  Registration of Certificates...................................
Section 5.03  Mutilated, Destroyed, Lost or Stolen Certificates..............
Section 5.04  Persons Deemed Owners..........................................
Section 5.05  Access to List of Certificateholders'Names and Addresses.......
Section 5.06  Maintenance of Office or Agency................................
Section 5.07  Definitive Certificates........................................
Section 5.08  Notices to Clearing Agency.....................................


                                   ARTICLE VI

                       THE SELLER AND THE MASTER SERVICER

Section 6.01  Liability of the Seller and the Master Servicer................
Section 6.02  Merger or Consolidation of the Seller or the Master
               Servicer......................................................
Section 6.03  Limitation on Liability of the Seller, the Master
               Servicer and Others...........................................
Section 6.04  Resignation of the Master Servicer.............................
Section 6.05  Compensation to the Master Servicer............................
Section 6.06  Assignment or Delegation of Duties by Master Servicer..........
Section 6.07  Indemnification of Trustee and Seller by Master Servicer.......
Section 6.08  Master Servicer Covenants Concerning Year 2000 Compliance......


                                   ARTICLE VII

                                     DEFAULT

Section 7.01  Events of Default.............................................
Section 7.02  Other Remedies of Trustee.....................................
Section 7.03  Directions by Certificateholders and Duties of Trustee
               During Event of Default......................................
Section 7.04  Action upon Certain Failures of the Master Servicer and
               upon Event of Default........................................
Section 7.05  Trustee to Act; Appointment of Successor......................
Section 7.06  Notification to Certificateholders............................


                                  ARTICLE VIII

                             CONCERNING THE TRUSTEE

Section 8.01  Duties of Trustee.............................................
Section 8.02  Certain Matters Affecting the Trustee.........................
Section 8.03  Trustee Not Required to Make Investigation....................
Section 8.04  Trustee Not Liable for Certificates or Mortgage Loans.........
Section 8.05  Trustee May Own Certificates..................................
Section 8.06  The Master Servicer to Pay Fees and Expenses..................
Section 8.07  Eligibility Requirements......................................
Section 8.08  Resignation and Removal.......................................
Section 8.09  Successor.....................................................
Section 8.10  Merger or Consolidation.......................................
Section 8.11  Authenticating Agent..........................................
Section 8.12  Separate Trustees and Co-Trustees.............................
Section 8.13  Appointment of Custodians.....................................
Section 8.14  Tax Matters; Compliance with REMIC Provisions.................
Section 8.15  Monthly Advances..............................................
Section 8.16  Trustee Covenants Concerning Year 2000 Compliance.............


                                   ARTICLE IX

                                   TERMINATION

Section 9.01  Termination upon Purchase by the Seller or Liquidation of
               All Mortgage Loans............................................
Section 9.02  Additional Termination Requirements............................


                                    ARTICLE X

                            MISCELLANEOUS PROVISIONS

Section 10.01 Amendment......................................................
Section 10.02 Recordation of Agreement.......................................
Section 10.03 Limitation on Rights of Certificateholders.....................
Section 10.04 Governing Law; Jurisdiction....................................
Section 10.05 Notices........................................................
Section 10.06 Severability of Provisions.....................................
Section 10.07 Special Notices to Rating Agencies.............................
Section 10.08 Covenant of Seller.............................................
Section 10.09 Recharacterization.............................................


                                   ARTICLE XI

                             TERMS FOR CERTIFICATES

Section 11.01 Class A Fixed Pass-Through Rate................................
Section 11.02 Cut-Off Date...................................................
Section 11.03 Cut-Off Date Aggregate Principal Balance.......................
Section 11.04 Original Class A Percentage....................................
Section 11.05 Original Principal Balances of the Classes of Class A
               Certificates..................................................
SECTION 11.05(A)ORIGINAL CLASS A-6 NOTIONAL AMOUNT...........................
Section 11.06 Original Class A Non-PO Principal Balance......................
Section 11.07 Original Subordinated Percentage...............................
Section 11.08 Original Class B-1 Percentage..................................
Section 11.09 Original Class B-2 Percentage..................................
Section 11.10 Original Class B-3 Percentage..................................
Section 11.11 Original Class B-4 Percentage..................................
Section 11.12 Original Class B-5 Percentage..................................
Section 11.13 Original Class B-6 Percentage..................................
Section 11.14 Original Class B Principal Balance.............................
Section 11.15 Original Principal Balances of the Classes of Class B
               Certificates..................................................
Section 11.16 Original Class B-1 Fractional Interest.........................
Section 11.17 Original Class B-2 Fractional Interest.........................
Section 11.18 Original Class B-3 Fractional Interest.........................
Section 11.19 Original Class B-4 Fractional Interest.........................
Section 11.20 Original Class B-5 Fractional Interest.........................
Section 11.21 Closing Date...................................................
Section 11.22 Right to Purchase..............................................
Section 11.23 Wire Transfer Eligibility......................................
Section 11.24 Single Certificate.............................................
Section 11.25 Servicing Fee Rate.............................................
Section 11.26 Master Servicing Fee Rate......................................


                                    EXHIBITS


EXHIBIT A-1       -     Form of Face of Class A-1 Certificate
EXHIBIT A-2       -     Form of Face of Class A-2 Certificate
EXHIBIT A-3       -     Form of Face of Class A-3 Certificate
EXHIBIT A-4       -     Form of Face of Class A-4 Certificate
EXHIBIT A-5       -     Form of Face of Class A-5 Certificate
EXHIBIT A-6       -     Form of Face of Class A-6 Certificate
EXHIBIT A-7       -     Form of Face of Class A-7 Certificate
EXHIBIT A-8       -     Form of Face of Class A-8 Certificate
EXHIBIT A-9       -     Form of Face of Class A-9 Certificate
EXHIBIT A-10      -     Form of Face of Class A-10 Certificate
EXHIBIT A-11      -     Form of Face of Class A-11 Certificate
EXHIBIT A-12      -     Form of Face of Class A-12 Certificate
EXHIBIT A-13      -     Form of Face of Class A-13 Certificate
EXHIBIT A-14      -     Form of Face of Class A-14 Certificate
EXHIBIT A-PO      -     Form of Face of Class A-PO Certificate
EXHIBIT A-R       -     Form of Face of Class A-R Certificate
EXHIBIT A-LR      -     Form of Face of Class A-LR Certificate
EXHIBIT B-1       -     Form of Face of Class B-1 Certificate
EXHIBIT B-2       -     Form of Face of Class B-2 Certificate
EXHIBIT B-3       -     Form of Face of Class B-3 Certificate
EXHIBIT B-4       -     Form of Face of Class B-4 Certificate
EXHIBIT B-5       -     Form of Face of Class B-5 Certificate
EXHIBIT B-6       -     Form of Face of Class B-6 Certificate
EXHIBIT C         -     Form of Reverse of Series 1999-16 Certificates
EXHIBIT D         -     Reserved
EXHIBIT E         -     Custodial Agreement
EXHIBIT F-1       -     Schedule of Mortgage Loans Serviced by Norwest
                        Mortgage in locations other than Fredrick, Maryland
EXHIBIT F-2       -     Schedule of Mortgage Loans Serviced by Norwest
                        Mortgage from Fredrick, Maryland
EXHIBIT F-3       -     Schedule of Mortgage Loans Serviced by Other Servicers
EXHIBIT G         -     Request for Release
EXHIBIT H         -     Affidavit Pursuant to Section 860E(e)(4) of the
                        Internal Revenue Code of 1986, as amended, and for
                        Non-ERISA Investors
EXHIBIT I         -     Letter from Transferor of Residual Certificates
EXHIBIT J         -     Transferee's Letter (Class [A-PO][B-4][B-5][B-6]
                        Certificates)
EXHIBIT K         -     Transferee's Letter (Class [A-14][B-1][B-2][B-3]
                        Certificates)
EXHIBIT L         -     Servicing Agreements
EXHIBIT M         -     Form of Special Servicing Agreement


<PAGE>


            This  Pooling  and  Servicing  Agreement,  dated as of May 28,  1999
executed  by NORWEST  ASSET  SECURITIES  CORPORATION,  as Seller,  NORWEST  BANK
MINNESOTA,  NATIONAL  ASSOCIATION,  as Master  Servicer and FIRST UNION NATIONAL
BANK, as Trustee.


                                WITNESSETH THAT:

            In  consideration of the mutual  agreements  herein  contained,  the
Seller, the Master Servicer and the Trustee agree as follows:

                                    ARTICLE I

                                   DEFINITIONS

            SECTION 1.01  DEFINITIONS.

            Whenever used herein,  the following  words and phrases,  unless the
context otherwise requires, shall have the meanings specified in this Article.

            Accepted  Master  Servicing  Practices:  Accepted  Master  Servicing
Practices shall consist of the customary and usual master servicing practices of
prudent master servicing  institutions  which service mortgage loans of the same
type as the Mortgage Loans in the  jurisdictions in which the related  Mortgaged
Properties are located,  regardless of the date upon which the related  Mortgage
Loans were originated.

            Accretion  Directed  Certificates:  The Class A-1,  Class A-2, Class
A-3, Class A-4,  Class A-5,  Class A-7, Class A-8, Class A-9, Class A-10,  Class
A-11 and Class A-12 Certificates.

            Accretion Termination Date: (A) for the Class A-12 Certificates will
be the earlier to occur of (i) the Distribution  Date following the Distribution
Date on which the Principal Balances of the Class A-8 and Class A-9 Certificates
has been reduced to zero or (ii) the Cross-Over Date; and (B) for the Class A-13
Certificates will be the earlier to occur of (i) the Distribution Date following
the  Distribution  Date on which the Principal  Balances of the Class A-4, Class
A-5, Class A-8, Class A-9 and Class A-12  Certificates have been reduced to zero
or (ii) the Cross-Over Date;

            Accrual Certificates:  The Class A-12 and Class A-13 Certificates.

            Accrual  Distribution  Amount:  As to any Distribution Date prior to
the applicable Accretion Termination Date and any Class of Accrual Certificates,
an amount equal to the sum of (i) the Class A Interest  Percentage of such Class
of Accrual Certificates of the Current Class A Interest  Distribution Amount and
(ii)  the  Class A  Interest  Shortfall  Percentage  of such  Class  of  Accrual
Certificates  of the amount  distributed  in  respect of the  Classes of Class A
Certificates  pursuant  to  Paragraph  second  of  Section  4.01(a)(i)  on  such
Distribution  Date.  As to any  Distribution  Date on or  after  the  applicable
Accretion Termination Date, zero.

            Adjusted Pool Amount:  With respect to any  Distribution  Date,  the
Cut-Off Date Aggregate  Principal Balance of the Mortgage Loans minus the sum of
(i) all  amounts in respect of  principal  received  in respect of the  Mortgage
Loans  (including,  without  limitation,  amounts received as Monthly  Payments,
Periodic Advances,  Unscheduled  Principal  Receipts and Substitution  Principal
Amounts) and  distributed to Holders of the  Certificates  on such  Distribution
Date and all prior  Distribution  Dates and (ii) the  principal  portion  of all
Realized  Losses (other than Debt Service  Reductions)  incurred on the Mortgage
Loans  from  the  Cut-Off  Date  through  the end of the  month  preceding  such
Distribution Date.

            Adjusted Pool Amount (PO Portion):  With respect to any Distribution
Date,  the sum of the  amounts,  calculated  as  follows,  with  respect  to all
Outstanding  Mortgage  Loans:  the product of (i) the PO Fraction  for each such
Mortgage Loan and (ii) the remainder of (A) the Cut-Off Date  Principal  Balance
of such  Mortgage  Loan  minus  (B) the sum of (x) all  amounts  in  respect  of
principal  received  in  respect  of  such  Mortgage  Loan  (including,  without
limitation, amounts received as Monthly Payments, Periodic Advances, Unscheduled
Principal  Receipts  and  Substitution  Principal  Amounts) and  distributed  to
Holders of the Certificates on such Distribution Date and all prior Distribution
Dates and (y) the  principal  portion of any  Realized  Loss  (other than a Debt
Service Reduction)  incurred on such Mortgage Loan from the Cut-Off Date through
the end of the month preceding such Distribution Date.

            Adjusted  Principal  Balance:  As to any  Distribution  Date and any
Class of Class B Certificates, the greater of (A) zero and (B) (i) the Principal
Balance  of such Class with  respect  to such  Distribution  Date minus (ii) the
Adjustment Amount for such Distribution Date less the Principal Balances for any
Classes of Class B Certificates with higher numerical designations.

            Adjustment Amount: For any Distribution Date, the difference between
(A) the sum of the Class A Principal Balance and Class B Principal Balance as of
the  related  Determination  Date and (B) the sum of (i) the sum of the  Class A
Principal  Balance and Class B Principal  Balance as of the  Determination  Date
succeeding such Distribution  Date, (ii) the principal portion of Excess Special
Hazard Losses, Excess Fraud Losses and Excess Bankruptcy Losses allocated to the
Certificates  with  respect to such  Distribution  Date and (iii) the  aggregate
amount  that  would  have  been  distributed  to all  Classes  as  principal  in
accordance with Section  4.01(a)(i) for such Distribution Date without regard to
the provisos in the definitions of Class B-1 Optimal Principal Amount, Class B-2
Optimal Principal Amount,  Class B-3 Optimal Principal Amount, Class B-4 Optimal
Principal  Amount,  Class B-5  Optimal  Principal  Amount and Class B-6  Optimal
Principal Amount.

            Aggregate Class A Distribution  Amount: As to any Distribution Date,
the  aggregate  amount  distributable  to the  Classes  of Class A  Certificates
pursuant to Paragraphs first,  second, third and fourth of Section 4.01(a)(i) on
such Distribution Date.

            Aggregate Class A Unpaid Interest Shortfall:  As to any Distribution
Date, an amount equal to the sum of the Class A Unpaid  Interest  Shortfalls for
all the Classes of Class A Certificates.

            Aggregate   Current   Bankruptcy   Losses:   With   respect  to  any
Distribution  Date,  the sum of all  Bankruptcy  Losses  incurred  on any of the
Mortgage Loans in the month preceding the month of such Distribution Date.

            Aggregate  Current  Fraud Losses:  With respect to any  Distribution
Date,  the sum of all Fraud Losses  incurred on any of the Mortgage Loans in the
month preceding the month of such Distribution Date.

            Aggregate  Current  Special  Hazard  Losses:  With  respect  to  any
Distribution  Date, the sum of all Special Hazard Losses  incurred on any of the
Mortgage Loans in the month preceding the month of such Distribution Date.

            Aggregate  Foreclosure  Profits:  As to any  Distribution  Date, the
aggregate  amount of  Foreclosure  Profits  with  respect to all of the Mortgage
Loans.

            Agreement:  This Pooling and Servicing  Agreement and all amendments
and supplements hereto.

            Applicable Unscheduled Principal Receipt Period: With respect to the
Mortgage Loans serviced by each Servicer and each of Full Unscheduled  Principal
Receipts and Partial Unscheduled  Principal Receipts,  the Unscheduled Principal
Receipt Period  specified on Schedule I hereto,  as amended from time to time by
the Master Servicer pursuant to Section 10.01(b)
hereof.

            Authenticating  Agent:  Any  authenticating  agent  appointed by the
Trustee  pursuant to Section 8.11.  There shall  initially be no  Authenticating
Agent for the Certificates.

            Available Master Servicer Compensation: As to any Distribution Date,
the sum of (a) the Master Servicing Fee for such Distribution Date, (b) interest
earned  through the business day preceding the applicable  Distribution  Date on
any  Prepayments  in Full remitted to the Master  Servicer and (c) the aggregate
amount of Month End Interest  remitted by the  Servicers to the Master  Servicer
pursuant to the related Servicing Agreements.

            Bankruptcy Code:  The Bankruptcy Code of 1978, as amended.

            Bankruptcy  Loss:  With  respect to any  Mortgage  Loan, a Deficient
Valuation or Debt Service Reduction;  provided,  however, that a Bankruptcy Loss
shall  not be  deemed a  Bankruptcy  Loss  hereunder  so long as the  applicable
Servicer has  notified the Master  Servicer and the Trustee in writing that such
Servicer is diligently  pursuing any remedies that may exist in connection  with
the  representations and warranties made regarding the related Mortgage Loan and
either (A) the related  Mortgage  Loan is not in default with regard to payments
due  thereunder or (B)  delinquent  payments of principal and interest under the
related  Mortgage  Loan  and  any  premiums  on any  applicable  primary  hazard
insurance  policy and any related  escrow  payments in respect of such  Mortgage
Loan are being  advanced  on a current  basis by such  Servicer  without  giving
effect to any Debt Service Reduction.

            Bankruptcy  Loss Amount:  As of any  Distribution  Date prior to the
first  anniversary of the Cut-Off Date,  the  Bankruptcy  Loss Amount will equal
$50,000 minus the aggregate amount of Bankruptcy  Losses allocated solely to the
Class B Certificates  in accordance with Section 4.02(a) since the Cut-Off Date.
As of any  Distribution  Date on or after the first  anniversary  of the Cut-Off
Date,  an amount  equal to (1) the  lesser  of (a) the  Bankruptcy  Loss  Amount
calculated as of the close of business on the Business Day immediately preceding
the most recent  anniversary  of the Cut-Off Date  coinciding  with or preceding
such Distribution  Date (the "Relevant  Anniversary") and (b) such lesser amount
which,  as  determined  on the  Relevant  Anniversary  will not  cause any rated
Certificates  to be placed on credit  review  status  (other  than for  possible
upgrading) by either Rating Agency minus (2) the aggregate  amount of Bankruptcy
Losses  allocated  solely to the Class B Certificates in accordance with Section
4.02(a) since the Relevant  Anniversary.  On and after the  Cross-Over  Date the
Bankruptcy Loss Amount shall be zero.

            Bank United  Mortgage  Loan Sale  Agreement:  The mortgage loan sale
agreement  dated as of September  17, 1998 between Bank United,  as seller,  and
Norwest Funding, Inc., as purchaser.

            Beneficial  Owner:  With  respect to a Book-Entry  Certificate,  the
Person who is the beneficial owner of such Book-Entry Certificate,  as reflected
on the books of the Clearing Agency, or on the books of a Person  maintaining an
account with such Clearing Agency  (directly or as an indirect  participant,  in
accordance with the rules of such Clearing Agency), as the case may be.

            Book-Entry Certificate: Any one of the Class A-1 Certificates, Class
A-2  Certificates,  Class A-3 Certificates,  Class A-4  Certificates,  Class A-5
Certificates,   Class  A-7  Certificates,  Class  A-8  Certificates,  Class  A-9
Certificates,  Class  A-10  Certificates,  Class A-11  Certificates,  Class A-12
Certificates and Class A-13 Certificates,  beneficial ownership and transfers of
which shall be  evidenced  by, and made  through,  book  entries by the Clearing
Agency as described in Section 5.01(b).

            Business Day: Any day other than (i) a Saturday or a Sunday, or (ii)
a legal holiday in the City of New York, State of Iowa, State of Maryland, State
of  Minnesota  or  State  of North  Carolina  or  (iii) a day on  which  banking
institutions  in the City of New York, or the State of Iowa,  State of Maryland,
State of Minnesota or State of North Carolina are authorized or obligated by law
or executive order to be closed.

            Certificate:  Any  one  of the  Class  A  Certificates  or  Class  B
Certificates.

            Certificate Account: The trust account established and maintained by
the Master  Servicer in the name of the Master Servicer on behalf of the Trustee
pursuant to Section 3.01. The Certificate Account shall be an Eligible Account.

            Certificate Register and Certificate  Registrar:  Respectively,  the
register  maintained pursuant to and the registrar provided for in Section 5.02.
The initial Certificate Registrar is the Trustee.

            Certificateholder  or Holder: The Person in whose name a Certificate
is registered in the Certificate Register,  except that, solely for the purposes
of the  taking  of any  action  under  Articles  VII or  VIII,  any  Certificate
registered  in the name of the  Master  Servicer,  a Servicer  or any  affiliate
thereof shall be deemed not to be outstanding and the Voting Interest  evidenced
thereby  shall not be taken into account in  determining  whether the  requisite
percentage  of  Certificates  necessary  to  effect  any  such  action  has been
obtained.

            Class:  All   certificates   whose  form  is  identical  except  for
variations in the Percentage Interest evidenced thereby.

            Class A Certificate:  Any one of the Class A-1  Certificates,  Class
A-2  Certificates,  Class A-3 Certificates,  Class A-4  Certificates,  Class A-5
Certificates,   Class  A-6  Certificates,  Class  A-7  Certificates,  Class  A-8
Certificates,  Class A-9  Certificates,  Class  A-10  Certificates,  Class  A-11
Certificates,  Class  A-12  Certificates,  Class A-13  Certificates,  Class A-14
Certificates,  Class  A-PO  Certificates,  Class A-R  Certificate  or Class A-LR
Certificate.

            Class  A  Certificateholder:  The  registered  holder  of a  Class A
Certificate.

            Class A Distribution  Amount:  As to any  Distribution  Date and any
Class of Class A Certificates  (other than the Class A-6, Class A-12, Class A-13
and Class A-PO Certificates),  the amount distributable to such Class of Class A
Certificates  pursuant  to  Paragraphs  first,  second  and third  clause (A) of
Section 4.01(a)(i).  As to the Class A-6 Certificates,  the amount distributable
to such Class pursuant to Paragraphs first and second of Section 4.01(a)(i).  As
to the Class A-12 and Class A-13  Certificates,  (a) as to any Distribution Date
prior to the applicable Accretion  Termination Date, the amount distributable to
such Class of Accrual Certificates  pursuant to the provisos in Paragraphs first
and second of  Section  4.01(a)(i)  and  Paragraph  third  clause (A) of Section
4.01(a)(i)  and (b) as to any  Distribution  Date  on or  after  the  applicable
Accretion  Termination  Date, the amount  distributable to such Class of Accrual
Certificates  pursuant  to  Paragraphs  first,  second  and third  clause (A) of
Section 4.01(a)(i). As to any Distribution Date and the Class A-PO Certificates,
the amount  distributable to the Class A-PO Certificates  pursuant to Paragraphs
third clause (B) and fourth of Section 4.01(a)(i) on such Distribution Date.

            Class A Fixed  Pass-Through  Rate: As to any Distribution  Date, the
rate per annum set forth in Section 11.01.

            Class A Interest Accrual Amount:  As to any  Distribution  Date, the
sum of the Interest Accrual Amounts for the Classes of Class A Certificates with
respect to such Distribution Date.

            Class A Interest  Percentage:  As to any  Distribution  Date and any
Class of Class A  Certificates  (other  than the Class A-PO  Certificates),  the
percentage  calculated  by dividing  the Interest  Accrual  Amount of such Class
(determined  without  regard to clause  (ii) of the  definition  thereof) by the
Class A Interest Accrual Amount (determined without regard to clause (ii) of the
definition of each Interest Accrual Amount).

            Class A Interest  Shortfall  Amount: As to any Distribution Date and
any Class of Class A  Certificates,  any  amount by which the  Interest  Accrual
Amount of such Class with respect to such  Distribution  Date exceeds the amount
distributed  in respect  of such Class on such  Distribution  Date  pursuant  to
Paragraph  first  of  Section  4.01(a)(i)  including,  in the case of a Class of
Accrual  Certificates  prior to the  applicable  Accrual  Termination  Date, the
amount included in the Accrual Distribution Amount pursuant to clause (i) of the
definition thereof.

            Class A Interest Shortfall  Percentage:  As to any Distribution Date
and any Class of Class A Certificates the percentage  calculated by dividing the
Class A Unpaid Interest Shortfall for such Class by the Aggregate Class A Unpaid
Interest  Shortfall  determined as of the Business Day preceding the  applicable
Distribution Date.

            Class A Loss Denominator:  As to any  Determination  Date, an amount
equal  to the sum of (i) the  Principal  Balances  of the  Class A  Certificates
(other than the Accrual Certificates and the Class A-PO Certificates);  and (ii)
with respect to each Class of Accrual Certificates,  the lesser of the Principal
Balance of such Class of Accrual Certificates and the Original Principal Balance
of such Class of Accrual Certificates.

            Class A Loss Percentage:  As to any Determination Date and any Class
of  Class  A  Certificates   (other  than  the  Class  A-PO  Certificates)  then
outstanding, the percentage calculated by dividing the Principal Balance of such
Class  (or,  in the  case of a  Class  of  Accrual  Certificates,  the  Original
Principal  Balance  of such  Class if  lower)  by the  Class A Loss  Denominator
(determined without regard to any such Principal Balance of any Class of Class A
Certificates not then outstanding),  in each case determined as of the preceding
Determination Date.

            Class A Non-PO Optimal Amount: As to any Distribution  Date, the sum
for such Distribution Date of (i) the Class A Interest Accrual Amount,  (ii) the
Aggregate Class A Unpaid Interest Shortfall and (iii) the Class A Non-PO Optimal
Principal Amount.

            Class A Non-PO  Optimal  Principal  Amount:  As to any  Distribution
Date, an amount equal to the sum, as to each  Outstanding  Mortgage Loan, of the
product of (x) the Non-PO  Fraction with respect to such Mortgage  Loan, and (y)
the sum of:

      (i) the Class A  Percentage  of (A) the  principal  portion of the Monthly
      Payment due on the Due Date  occurring  in the month of such  Distribution
      Date on such Mortgage  Loan,  less (B) if the  Bankruptcy  Loss Amount has
      been reduced to zero, the principal  portion of any Debt Service Reduction
      with respect to such Mortgage Loan;

      (ii)  the  Class A  Prepayment  Percentage  of all  Unscheduled  Principal
      Receipts  that were  received by a Servicer  with respect to such Mortgage
      Loan during the Applicable  Unscheduled  Principal Receipt Period relating
      to such Distribution Date for each applicable type of
      Unscheduled Principal Receipt;

      (iii) the Class A Prepayment Percentage of the Scheduled Principal Balance
      of such Mortgage Loan which,  during the month preceding the month of such
      Distribution  Date, was repurchased by the Seller pursuant to Section 2.02
      or 2.03; and

      (iv) the Class A Percentage of the excess of the unpaid principal  balance
      of such Mortgage Loan substituted for a defective Mortgage Loan during the
      month preceding the month in which such  Distribution Date occurs over the
      unpaid principal balance of such defective  Mortgage Loan, less the amount
      allocable to the principal  portion of any unreimbursed  Periodic Advances
      previously  made by the applicable  Servicer,  the Master  Servicer or the
      Trustee in respect of such defective Mortgage Loan.

            Class A Non-PO Principal  Amount:  As to any Distribution  Date, the
aggregate  amount  distributed in respect of the Classes of Class A Certificates
pursuant to Paragraph third clause (A) of Section 4.01(a)(i).

            Class A Non-PO Principal Balance: As of any date, an amount equal to
the Class A  Principal  Balance  less the  Principal  Balance  of the Class A-PO
Certificates.

            Class A Non-PO Principal Distribution Amount: As to any Distribution
Date, the sum of (i) the sum of the applicable Accrual Distribution  Amounts, if
any,  with  respect  to such  Distribution  Date  and  (ii)  the  Class A Non-PO
Principal Amount with respect to such Distribution Date.

            Class A Pass-Through  Rate: As to the Class A-12,  Class A-13, Class
A-14,  Class A-R and Class  A-LR  Certificates,  the Class A Fixed  Pass-Through
Rate. As to the Class A-1,  Class A-2, Class A-3, Class A-4, Class A-8 and Class
A-11  Certificates,  6.000% per annum. As to the Class A-7 Certificates,  6.400%
per annum. As to the Class A-10 Certificates,  6.750% per annum. As to the Class
A-9 Certificates,  7.000% per annum. As to the Class A-5 Certificates, the Class
A-5  Pass-Through  Rate.  As to  the  Class  A-6  Certificates,  the  Class  A-6
Pass-Through  Rate. The Class A-PO Certificates are not entitled to interest and
have no Class A Pass-Through Rate.

            Class A  Percentage:  As to any  Distribution  Date  occurring on or
prior to the  Cross-Over  Date,  the lesser of (i) 100% and (ii) the  percentage
obtained by dividing the Class A Non-PO Principal Balance  (determined as of the
Determination Date preceding such Distribution Date) by the Pool Balance (Non-PO
Portion).  As to any  Distribution  Date occurring  subsequent to the Cross-Over
Date,  100% or such  lesser  percentage  which  will  cause  the  Class A Non-PO
Principal  Balance to decline to zero  following the  distribution  made on such
Distribution Date.

            Class A Prepayment  Percentage:  As to any Distribution  Date to and
including the Distribution  Date in May 2004, 100%. As to any Distribution  Date
subsequent to May 2004 to and including the  Distribution  Date in May 2005, the
Class A Percentage  as of such  Distribution  Date plus 70% of the  Subordinated
Percentage as of such Distribution  Date. As to any Distribution Date subsequent
to May 2005 to and  including  the  Distribution  Date in May 2006,  the Class A
Percentage as of such Distribution Date plus 60% of the Subordinated  Percentage
as of such Distribution Date. As to any Distribution Date subsequent to May 2006
to and including the Distribution Date in May 2007, the Class A Percentage as of
such  Distribution  Date  plus  40% of the  Subordinated  Percentage  as of such
Distribution  Date. As to any  Distribution  Date  subsequent to May 2007 to and
including the  Distribution  Date in May 2008, the Class A Percentage as of such
Distribution   Date  plus  20%  of  the  Subordinated   Percentage  as  of  such
Distribution Date. As to any Distribution Date subsequent to May 2008, the Class
A  Percentage  as of such  Distribution  Date.  The  foregoing is subject to the
following:  (i) if the aggregate distribution to Holders of Class A Certificates
on any Distribution Date of the Class A Prepayment  Percentage provided above of
(a) Unscheduled Principal Receipts distributable on such Distribution Date would
reduce the Class A Non-PO  Principal  Balance below zero, the Class A Prepayment
Percentage for such Distribution Date shall be the percentage necessary to bring
the  Class A  Non-PO  Principal  Balance  to zero  and  thereafter  the  Class A
Prepayment Percentage shall be zero and (ii) if the Class A Percentage as of any
Distribution  Date is greater than the Original Class A Percentage,  the Class A
Prepayment Percentage for such Distribution Date shall be 100%.  Notwithstanding
the  foregoing,  with respect to any  Distribution  Date on which the  following
criteria  are not  met,  the  reduction  of the  Class A  Prepayment  Percentage
described in the second  through sixth  sentences of this  definition of Class A
Prepayment  Percentage shall not be applicable with respect to such Distribution
Date. In such event,  the Class A Prepayment  Percentage  for such  Distribution
Date will be determined  in accordance  with the  applicable  provision,  as set
forth in the first through  fifth  sentences  above,  which was actually used to
determine the Class A Prepayment  Percentage for the Distribution Date occurring
in the May preceding such  Distribution  Date (it being  understood that for the
purposes  of the  determination  of the Class A  Prepayment  Percentage  for the
current  Distribution  Date,  the current  Class A Percentage  and  Subordinated
Percentage  shall be utilized).  In order for the  reduction  referred to in the
second  through  sixth   sentences  to  be  applicable,   with  respect  to  any
Distribution  Date  (a)  the  average  outstanding  principal  balance  on  such
Distribution Date and for the preceding five Distribution  Dates on the Mortgage
Loans that were  delinquent  60 days or more  (including  for this  purpose  any
payments  due with  respect to Mortgage  Loans in  foreclosure  and REO Mortgage
Loans)  must be less than 50% of the current  Class B Principal  Balance and (b)
cumulative  Realized  Losses  shall not exceed (1) 30% of the  Original  Class B
Principal  Balance if such  Distribution  Date occurs between and including June
2004 and May 2005,  (2) 35% of the  Original  Class B Principal  Balance if such
Distribution  Date occurs  between and including June 2005 and May 2006, (3) 40%
of the  Original  Class B  Principal  Balance if such  Distribution  Date occurs
between and including  June 2006 and May 2007,  (4) 45% of the Original  Class B
Principal  Balance if such  Distribution  Date occurs between and including June
2007 and May 2008, and (5) 50% of the Original Class B Principal Balance if such
Distribution  Date  occurs  during  or after  June  2008.  With  respect  to any
Distribution  Date on which the Class A Prepayment  Percentage  is reduced below
the Class A Prepayment  Percentage for the prior  Distribution  Date, the Master
Servicer shall certify to the Trustee,  based upon information  provided by each
Servicer as to the Mortgage  Loans serviced by it that the criteria set forth in
the preceding sentence are met.

            Class A Principal  Balance:  As of any date,  an amount equal to the
sum of the  Principal  Balances  for  the  Class  A-1  Certificates,  Class  A-2
Certificates,   Class  A-3  Certificates,  Class  A-4  Certificates,  Class  A-5
Certificates,   Class  A-7  Certificates,  Class  A-8  Certificates,  Class  A-9
Certificates,  Class  A-10  Certificates,  Class A-11  Certificates,  Class A-12
Certificates,  Class  A-13  Certificates,  Class A-14  Certificates,  Class A-PO
Certificates, Class A-R Certificate and Class A-LR Certificate.

            Class A Unpaid Interest  Shortfall:  As to any Distribution Date and
any Class of Class A Certificates, the amount, if any, by which the aggregate of
the Class A Interest  Shortfall  Amounts  for such Class for prior  Distribution
Dates is in excess of the  amounts  distributed  in respect of such Class (or in
the case of a Class of Accrual  Certificates  prior to the applicable  Accretion
Termination  Date,  the  amount  included  in the  Accrual  Distribution  Amount
pursuant to clause (ii) of the definition  thereof) on prior  Distribution Dates
pursuant to Paragraph second of Section 4.01(a)(i).

            Class A-1 Certificate:  Any one of the Certificates  executed by the
Trustee  and  authenticated  by the  Trustee  or  the  Authenticating  Agent  in
substantially the form set forth in Exhibit A-1 and Exhibit C hereto.

            Class A-1  Certificateholder:  The registered  holder of a Class A-1
Certificate.

            Class A-2 Certificate:  Any one of the Certificates  executed by the
Trustee  and  authenticated  by the  Trustee  or  the  Authenticating  Agent  in
substantially the form set forth in Exhibit A-2 and Exhibit C hereto.

            Class A-2  Certificateholder:  The registered  holder of a Class A-2
Certificate.

            Class A-3 Certificate:  Any one of the Certificates  executed by the
Trustee  and  authenticated  by the  Trustee  or  the  Authenticating  Agent  in
substantially the form set forth in Exhibit A-3 and Exhibit C hereto.

            Class A-3  Certificateholder:  The registered  holder of a Class A-3
Certificate.

            Class A-4 Certificate:  Any one of the Certificates  executed by the
Trustee  and  authenticated  by the  Trustee  or  the  Authenticating  Agent  in
substantially the form set forth in Exhibit A-4 and Exhibit C hereto.

            Class A-4  Certificateholder:  The registered  holder of a Class A-4
Certificate.

            Class A-5 Certificate:  Any one of the Certificates  executed by the
Trustee  and  authenticated  by the  Trustee  or  the  Authenticating  Agent  in
substantially the form set forth in Exhibit A-5 and Exhibit C hereto.

            Class A-5  Certificateholder:  The registered  holder of a Class A-5
Certificate.

            Class A-5 Pass-Through  Rate: With respect to the Distribution  Date
occurring  in June  1999,  5.235%  per annum.  With  respect to each  succeeding
Distribution Date, a per annum rate, determined by the Trustee on the applicable
Rate Determination Date, equal to 0.300% plus LIBOR subject to a minimum rate of
0.300% and a maximum rate of 8.000%.

            Class A-6 Certificate:  Any one of the Certificates  executed by the
Trustee  and  authenticated  by the  Trustee  or  the  Authenticating  Agent  in
substantially the form set forth in Exhibit A-6 and Exhibit C hereto.

            Class A-6  Certificateholder:  The registered  holder of a Class A-6
Certificate.

            Class A-6 Interest Accrual Amount: As to any Distribution  Date, (i)
the  product  of (A) 1/12th of the Class A  Pass-Through  Rate for the Class A-6
Certificates and (B) the Class A-6 Notional Amount as of such  Distribution Date
minus (ii) the Class A Interest  Percentage of the Class A-6 Certificates of (x)
any Non-Supported Interest Shortfall allocated to the Class A Certificates,  (y)
the interest  portion of any Excess Special  Hazard Losses,  Excess Fraud Losses
and Excess  Bankruptcy Losses allocated to the Class A Certificates with respect
to such  Distribution  Date  pursuant to Section  4.02(e)  and (z) the  interest
portion of any Realized Losses (other than Excess Special Hazard Losses,  Excess
Fraud Losses and Excess Bankruptcy Losses) allocated to the Class A Certificates
on or after the Cross-Over Date pursuant to Section 4.02(e).

            Class A-6 Notional Amount:  As to any  Distribution  Date, an amount
equal to the Principal Balance of the Class A-5 Certificates.

            Class A-6 Pass-Through  Rate: With respect to the Distribution  Date
occurring  in June  1999,  2.765%  per annum.  With  respect to each  succeeding
Distribution Date, a per annum rate, determined by the Trustee on the applicable
Rate  Determination  Date, equal to 7.700% minus LIBOR subject to a minimum rate
of 0.000% and a maximum rate of 7.700%

            Class A-7 Certificate:  Any one of the Certificates  executed by the
Trustee  and  authenticated  by the  Trustee  or  the  Authenticating  Agent  in
substantially the form set forth in Exhibit A-7 and Exhibit C hereto.

            Class A-7  Certificateholder:  The registered  holder of a Class A-7
Certificate.

            Class A-8 Certificate:  Any one of the Certificates  executed by the
Trustee  and  authenticated  by the  Trustee  or  the  Authenticating  Agent  in
substantially the form set forth in Exhibit A-8 and Exhibit C hereto.

            Class A-8  Certificateholder:  The registered  holder of a Class A-8
Certificate.

            Class A-9 Certificate:  Any one of the Certificates  executed by the
Trustee  and  authenticated  by the  Trustee  or  the  Authenticating  Agent  in
substantially the form set forth in Exhibit A-9 and Exhibit C hereto.

            Class A-9  Certificateholder:  The registered  holder of a Class A-9
Certificate.

            Class A-10 Certificate:  Any one of the Certificates executed by the
Trustee  and  authenticated  by the  Trustee  or  the  Authenticating  Agent  in
substantially the form set forth in Exhibit A-10 and Exhibit C hereto.

            Class A-10 Certificateholder:  The registered holder of a Class A-10
Certificate.

            Class A-11 Certificate:  Any one of the Certificates executed by the
Trustee  and  authenticated  by the  Trustee  or  the  Authenticating  Agent  in
substantially the form set forth in Exhibit A-11 and Exhibit C hereto.

            Class A-11 Certificateholder:  The registered holder of a Class A-11
Certificate.

            Class A-12 Certificate:  Any one of the Certificates executed by the
Trustee  and  authenticated  by the  Trustee  or  the  Authenticating  Agent  in
substantially the form set forth in Exhibit A-12 and Exhibit C hereto.

            Class A-12 Certificateholder:  The registered holder of a Class A-12
Certificate.

            Class A-13 Certificate:  Any one of the Certificates executed by the
Trustee  and  authenticated  by the  Trustee  or  the  Authenticating  Agent  in
substantially the form set forth in Exhibit A-13 and Exhibit C hereto.

            Class A-13 Certificateholder:  The registered holder of a Class A-13
Certificate.

            Class A-13 Loss Amount: With respect to any Determination Date after
the Cross-Over Date, the amount,  if any, by which the Principal  Balance of the
Class A-13  Certificates  would be reduced as a result of the application of the
third sentence of the definition of Principal Balance.

            Class A-14 Certificate:  Any one of the Certificates executed by the
Trustee  and  authenticated  by the  Trustee  or  the  Authenticating  Agent  in
substantially the form set forth in Exhibit A-14 and Exhibit C hereto.

            Class A-14 Certificateholder:  The registered holder of a Class A-14
Certificate.

            Class A-14 Loss Allocation Amount: With respect to any Determination
Date after the  Cross-Over  Date the lesser of (a) the Principal  Balance of the
Class A-14  Certificates  with respect to such  Determination  Date prior to any
reduction for the Class A-14 Loss Allocation  Amount and (b) the Class A-13 Loss
Amount.

            Class A-L1  Interest:  A regular  interest in the  Lower-Tier  REMIC
which is held as an asset of the  Upper-Tier  REMIC and is  entitled  to monthly
distributions as provided in Section 4.01(a)(ii) hereof.

            Class A-L5  Interest:  A regular  interest in the  Lower-Tier  REMIC
which is held as an asset of the Upper  Tier  REMIC and is  entitled  to monthly
distributions as provided in Section 4.01(a)(ii) hereof.

            Class A-L7  Interest:  A regular  interest in the  Lower-Tier  REMIC
which is held as an asset of the Upper  Tier  REMIC and is  entitled  to monthly
distributions as provided in Section 4.01(a)(ii) hereof.

            Class A-L8  Interest:  A regular  interest in the  Lower-Tier  REMIC
which is held as an asset of the Upper  Tier  REMIC and is  entitled  to monthly
distributions as provided in Section 4.01(a)(ii) hereof.

            Class A-L12  Interest:  A regular  interest in the Lower-Tier  REMIC
which is held as an asset of the  Upper-Tier  REMIC and is  entitled  to monthly
distributions as provided in Section 4.01(a)(ii) hereof.

            Class A-L14  Interest:  A regular  interest in the Lower-Tier  REMIC
which is held as an asset of the  Upper-Tier  REMIC and is  entitled  to monthly
distributions as provided in Section 4.01(a)(ii) hereof.

            Class A-LPO  Interest:  A regular  interest in the Lower-Tier  REMIC
which is held as an asset of the  Upper-Tier  REMIC and is  entitled  to monthly
distributions as provided in Section 4.01(a)(ii) hereof.

            Class A-LR Certificate:  The Certificate executed by the Trustee and
authenticated by the Trustee or the  Authenticating  Agent in substantially  the
form set forth in Exhibit A-LR and Exhibit D hereto.

            Class A-LR   Certificateholder:   The  registered   holder  of  the
Class A-LR Certificate.

            Class A-LUR  Interest:  A regular  interest in the Lower-Tier  REMIC
which is held as an asset of the  Upper-Tier  REMIC and is  entitled  to monthly
distributions as provided in Section 4.01(a)(ii) hereof.

            Class A-PO Certificate:  Any one of the Certificates executed by the
Trustee  and  authenticated  by the  Trustee  or  the  Authenticating  Agent  in
substantially the form set forth in Exhibit A-PO and Exhibit C hereto.

            Class A-PO   Certificateholder:   The   registered   holder   of  a
Class A-PO Certificate.

            Class A-PO Deferred Amount:  For any Distribution  Date prior to the
Cross-Over  Date, the difference  between (A) the sum of (x) the amount by which
the sum of the Class A-PO Optimal Principal  Amounts for all prior  Distribution
Dates exceeded the amounts  distributed on the Class A-PO  Certificates  on such
prior  Distribution  Dates  pursuant to  Paragraph  third  clause (B) of Section
4.01(a)(i) and (y) the sum of the product for each Discount  Mortgage Loan which
became  a  Liquidated  Loan  at any  time on or  prior  to the  last  day of the
applicable  Unscheduled  Principal  Receipt Period for the current  Distribution
Date of (a) the PO Fraction for such  Discount  Mortgage  Loan and (b) an amount
equal to the principal  portion of Realized Losses (other than Bankruptcy Losses
due to Debt Service  Reductions)  incurred  with respect to such  Mortgage  Loan
other  than  Excess  Special  Hazard  Losses,  Excess  Fraud  Losses  and Excess
Bankruptcy Losses and (B) amounts  distributed on the Class A-PO Certificates on
prior Distribution Dates pursuant to Paragraph fourth of Section 4.01(a)(i).  On
and after the Cross-Over  Date, the Class A-PO Deferred  Amount will be zero. No
interest will accrue on any Class A-PO Deferred Amount.

            Class A-PO Optimal Principal Amount: As to any Distribution Date, an
amount equal to the sum as to each Outstanding  Mortgage Loan, of the product of
(x) the PO Fraction with respect to such Mortgage Loan and (y) the sum of:

      (i) (A) the principal  portion of the Monthly  Payment due on the Due Date
      occurring in the month of such  Distribution  Date on such Mortgage  Loan,
      less (B) if the  Bankruptcy  Loss  Amount has been  reduced  to zero,  the
      principal  portion  of any Debt  Service  Reduction  with  respect to such
      Mortgage Loan;

      (ii) all Unscheduled  Principal  Receipts that were received by a Servicer
      with  respect to such  Mortgage  Loan  during the  Applicable  Unscheduled
      Principal  Receipt  Period  relating  to such  Distribution  Date for each
      applicable type of Unscheduled Principal Receipt;

      (iii) the  Scheduled  Principal  Balance  of each  Mortgage  Loan that was
      repurchased by the Seller during such preceding  month pursuant to Section
      2.02 or 2.03;

      (iv) the excess of the unpaid  principal  balance  of such  Mortgage  Loan
      substituted  for a defective  Mortgage Loan during the month preceding the
      month in which such  Distribution  Date occurs  over the unpaid  principal
      balance of such defective  Mortgage Loan, less the amount allocable to the
      principal portion of any unreimbursed Periodic Advances previously made by
      the applicable Servicer,  the Master Servicer or the Trustee in respect of
      such defective Mortgage Loan.

            Class A-R Certificate:  The Certificate  executed by the Trustee and
authenticated by the Trustee or the  Authenticating  Agent in substantially  the
form set forth in Exhibit A-R and Exhibit C hereto.

            Class A-R Certificateholder:  The registered holder of the Class A-R
Certificate.

            Class B Certificate:  Any one of the Class B-1  Certificates,  Class
B-2  Certificates,  Class B-3 Certificates,  Class B-4  Certificates,  Class B-5
Certificates or Class B-6 Certificates.

            Class  B  Certificateholder:  The  registered  holder  of a  Class B
Certificate.

            Class B Distribution  Amount: Any of the Class B-1, Class B-2, Class
B-3, Class B-4, Class B-5 or Class B-6 Distribution Amounts.

            Class B Interest Accrual Amount:  As to any  Distribution  Date, the
sum of the Interest Accrual Amounts for the Classes of Class B Certificates with
respect to such Distribution Date.

            Class B Interest  Percentage:  As to any  Distribution  Date and any
Class of  Class B  Certificates,  the  percentage  calculated  by  dividing  the
Interest Accrual Amount of such Class (determined  without regard to clause (ii)
of the definition  thereof) by the Class B Interest  Accrual Amount  (determined
without  regard  to  clause  (ii) of the  definition  of each  Interest  Accrual
Amount).

            Class B Interest  Shortfall  Amount:  Any of the Class B-1  Interest
Shortfall  Amount,  Class B-2  Interest  Shortfall  Amount,  Class B-3  Interest
Shortfall  Amount,  Class B-4  Interest  Shortfall  Amount,  Class B-5  Interest
Shortfall Amount or Class B-6 Interest Shortfall Amount.

            Class B Loss Percentage:  As to any Determination Date and any Class
of Class B Certificates then outstanding,  the percentage calculated by dividing
the  Principal  Balance  of such  Class of Class B  Certificates  by the Class B
Principal  Balance  (determined  without regard to any Principal  Balance of any
Class of Class B Certificates not then outstanding),  in each case determined as
of the preceding Determination Date.

            Class B Pass-Through  Rate: As to any Distribution  Date, 6.500% per
annum.

            Class B Percentage:  Any one of the Class B-1 Percentage,  Class B-2
Percentage,  Class B-3 Percentage, Class B-4 Percentage, Class B-5 Percentage or
Class B-6 Percentage.

            Class B  Prepayment  Percentage:  Any of the  Class  B-1  Prepayment
Percentage,  Class B-2 Prepayment  Percentage,  Class B-3 Prepayment Percentage,
Class B-4 Prepayment  Percentage,  Class B-5 Prepayment  Percentage or Class B-6
Prepayment Percentage.

            Class B Principal  Balance:  As of any date,  an amount equal to the
sum of the Class B-1 Principal Balance,  Class B-2 Principal Balance,  Class B-3
Principal Balance,  Class B-4 Principal Balance, Class B-5 Principal Balance and
Class B-6 Principal Balance.

            Class B Unpaid  Interest  Shortfall:  Any of the  Class  B-1  Unpaid
Interest  Shortfall,  Class B-2  Unpaid  Interest  Shortfall,  Class B-3  Unpaid
Interest  Shortfall,  Class B-4  Unpaid  Interest  Shortfall,  Class B-5  Unpaid
Interest Shortfall or Class B-6 Unpaid Interest Shortfall.

            Class B-1 Certificate:  Any one of the Certificates  executed by the
Trustee  and  authenticated  by the  Trustee  or  the  Authenticating  Agent  in
substantially the form set forth in Exhibit B-1 and Exhibit C hereto.

            Class B-1  Certificateholder:  The registered  holder of a Class B-1
Certificate.

            Class B-1  Distribution  Amount:  As to any  Distribution  Date, any
amount  distributable to the Holders of the Class B-1  Certificates  pursuant to
Paragraphs fifth, sixth and seventh of Section 4.01(a)(i).

            Class B-1 Interest  Shortfall Amount:  As to any Distribution  Date,
any amount by which the Interest  Accrual  Amount of the Class B-1  Certificates
with respect to such Distribution Date exceeds the amount distributed in respect
of the Class B-1  Certificates on such  Distribution  Date pursuant to Paragraph
fifth of Section 4.01(a)(i).

            Class B-1 Optimal Principal Amount: As to any Distribution  Date, an
amount equal to the sum, as to each Outstanding Mortgage Loan, of the product of
(x) the Non-PO Fraction with respect to such Mortgage Loan and (y) the sum of:

      (i) the Class B-1  Percentage of (A) the principal  portion of the Monthly
      Payment due on the Due Date  occurring  in the month of such  Distribution
      Date on such Mortgage  Loan,  less (B) if the  Bankruptcy  Loss Amount has
      been reduced to zero, the principal  portion of any Debt Service Reduction
      with respect to such Mortgage Loan;

      (ii) the Class B-1  Prepayment  Percentage  of all  Unscheduled  Principal
      Receipts  that were  received by a Servicer  with respect to such Mortgage
      Loan during the Applicable  Unscheduled  Principal Receipt Period relating
      to such Distribution Date for each applicable type of
      Unscheduled Principal Receipt;

      (iii) the Class  B-1  Prepayment  Percentage  of the  Scheduled  Principal
      Balance of such Mortgage Loan which,  during the month preceding the month
      of such  Distribution  Date,  was  repurchased  by the Seller  pursuant to
      Section 2.02 or 2.03; and

      (iv) the Class  B-1  Percentage  of the  excess  of the  unpaid  principal
      balance of such Mortgage Loan  substituted  for a defective  Mortgage Loan
      during  the month  preceding  the month in which  such  Distribution  Date
      occurs over the unpaid principal balance of such defective  Mortgage Loan,
      less the amount  allocable to the  principal  portion of any  unreimbursed
      Periodic Advances previously made by the applicable  Servicer,  the Master
      Servicer or the Trustee in respect of such defective Mortgage Loan;

provided,  however,  that if an Optimal  Adjustment Event occurs with respect to
such Class and such  Distribution  Date, the Class B-1 Optimal  Principal Amount
will equal the lesser of (A) the Class B-1 Optimal  Principal Amount  calculated
as described in the preceding  provisions and (B) the Adjusted Principal Balance
for the Class B-1 Certificates.

            Class B-1 Percentage:  As to any  Distribution  Date, the percentage
calculated by multiplying the Subordinated Percentage by either (i) if any Class
B Certificates  (other than the Class B-1  Certificates) are eligible to receive
principal  distributions  for such  Distribution Date in accordance with Section
4.01(d),  a fraction,  the numerator of which is the Class B-1 Principal Balance
(determined as of the Determination  Date preceding such Distribution  Date) and
the denominator of which is the sum of the Principal  Balances of the Classes of
Class B  Certificates  eligible  to  receive  principal  distributions  for such
Distribution  Date in accordance  with the provisions of Section 4.01(d) or (ii)
except  as set  forth in  Section  4.01(d)(ii),  in the  event  that the Class B
Certificates (other than the Class B-1 Certificates) are not eligible to receive
distributions of principal in accordance with Section 4.01(d)(i), one.

            Class B-1 Prepayment  Percentage:  As to any Distribution  Date, the
percentage  calculated by multiplying the Subordinated  Prepayment Percentage by
either (i) if any Class B Certificates  (other than the Class B-1  Certificates)
are eligible to receive  principal  distributions  for such Distribution Date in
accordance with Section 4.01(d), a fraction, the numerator of which is the Class
B-1 Principal Balance  (determined as of the  Determination  Date preceding such
Distribution  Date)  and the  denominator  of which is the sum of the  Principal
Balances of the Classes of Class B  Certificates  eligible to receive  principal
distributions  for such  Distribution  Date in accordance with the provisions of
Section 4.01(d) or (ii) except as set forth in Section 4.01(d)(ii), in the event
that the Class B Certificates  (other than the Class B-1  Certificates)  are not
eligible to receive  distributions  of  principal  in  accordance  with  Section
4.01(d)(i), one.

            Class B-1 Principal Balance: As to the first Determination Date, the
Original Class B-1 Principal Balance.  As of any subsequent  Determination Date,
the lesser of (i) the Original  Class B-1 Principal  Balance less the sum of (a)
all amounts  previously  distributed in respect of the Class B-1 Certificates on
prior Distribution Dates (A) pursuant to Paragraph seventh of Section 4.01(a)(i)
and (B) as a  result  of a  Principal  Adjustment  and (b) the  Realized  Losses
allocated through such Determination Date to the Class B-1 Certificates pursuant
to  Section  4.02(b)  and (ii) the  Adjusted  Pool  Amount  as of the  preceding
Distribution  Date less the Class A Principal  Balance as of such  Determination
Date.

            Class B-1 Unpaid Interest  Shortfall:  As to any Distribution  Date,
the amount,  if any, by which the aggregate of the Class B-1 Interest  Shortfall
Amounts for prior Distribution Dates is in excess of the amounts  distributed in
respect of the Class B-1  Certificates on prior  Distribution  Dates pursuant to
Paragraph sixth of Section 4.01(a)(i).

            Class B-2 Certificate:  Any one of the Certificates  executed by the
Trustee  and  authenticated  by the  Trustee  or  the  Authenticating  Agent  in
substantially the form set forth in Exhibit B-2 and Exhibit C hereto.

            Class B-2  Certificateholder:  The registered  holder of a Class B-2
Certificate.

            Class B-2  Distribution  Amount:  As to any  Distribution  Date, any
amount  distributable to the Holders of the Class B-2  Certificates  pursuant to
Paragraphs eighth, ninth and tenth of Section 4.01(a)(i).

            Class B-2 Interest  Shortfall Amount:  As to any Distribution  Date,
any amount by which the Interest  Accrual  Amount of the Class B-2  Certificates
with respect to such Distribution Date exceeds the amount distributed in respect
of the Class B-2  Certificates on such  Distribution  Date pursuant to Paragraph
eighth of Section 4.01(a)(i).

            Class B-2 Optimal Principal Amount: As to any Distribution  Date, an
amount equal to the sum, as to each Outstanding Mortgage Loan, of the product of
(x) the Non-PO Fraction with respect to such Mortgage Loan and (y) the sum of:

      (i) the Class B-2  Percentage of (A) the principal  portion of the Monthly
      Payment due on the Due Date  occurring  in the month of such  Distribution
      Date on such Mortgage  Loan,  less (B) if the  Bankruptcy  Loss Amount has
      been reduced to zero, the principal  portion of any Debt Service Reduction
      with respect to such Mortgage Loan;

      (ii) the Class B-2  Prepayment  Percentage  of all  Unscheduled  Principal
      Receipts  that were  received by a Servicer  with respect to such Mortgage
      Loan during the Applicable  Unscheduled  Principal Receipt Period relating
      to such Distribution Date for each applicable type of
      Unscheduled Principal Receipt;

      (iii) the Class  B-2  Prepayment  Percentage  of the  Scheduled  Principal
      Balance of such Mortgage Loan which,  during the month preceding the month
      of such  Distribution  Date,  was  repurchased  by the Seller  pursuant to
      Section 2.02 or 2.03; and

      (iv) the Class  B-2  Percentage  of the  excess  of the  unpaid  principal
      balance of such Mortgage Loan  substituted  for a defective  Mortgage Loan
      during  the month  preceding  the month in which  such  Distribution  Date
      occurs over the unpaid principal balance of such defective  Mortgage Loan,
      less the amount  allocable to the  principal  portion of any  unreimbursed
      Periodic Advances previously made by the applicable  Servicer,  the Master
      Servicer or the Trustee in respect of such defective Mortgage Loan;

provided,  however,  that if an Optimal  Adjustment Event occurs with respect to
such Class and such  Distribution  Date, the Class B-2 Optimal  Principal Amount
will equal the lesser of (A) the Class B-2 Optimal  Principal Amount  calculated
as described in the preceding  provisions and (B) the Adjusted Principal Balance
for the Class B-2 Certificates.

            Class B-2 Percentage:  As to any  Distribution  Date,  except as set
forth in the next  sentence,  the percentage  calculated by multiplying  (i) the
Subordinated  Percentage by (ii) a fraction, the numerator of which is the Class
B-2 Principal Balance  (determined as of the  Determination  Date preceding such
Distribution  Date)  and the  denominator  of which is the sum of the  Principal
Balances of the Classes of Class B  Certificates  eligible to receive  principal
distributions  for such  Distribution  Date in accordance with the provisions of
Section 4.01(d).  Except as set forth in Section 4.01(d)(ii),  in the event that
the  Class  B-2  Certificates  are not  eligible  to  receive  distributions  of
principal in accordance  with Section  4.01(d)(i),  the Class B-2 Percentage for
such Distribution Date will be zero.

            Class B-2 Prepayment Percentage: As to any Distribution Date, except
as set forth in the next sentence,  the percentage calculated by multiplying (i)
the  Subordinated  Prepayment  Percentage  by (ii) a fraction,  the numerator of
which is the Class B-2 Principal  Balance  (determined  as of the  Determination
Date preceding such  Distribution  Date) and the denominator of which is the sum
of the  Principal  Balances of the Classes of Class B  Certificates  eligible to
receive  principal  distributions  for such Distribution Date in accordance with
the provisions of Section 4.01(d).  Except as set forth in Section  4.01(d)(ii),
in the  event  that the Class  B-2  Certificates  are not  eligible  to  receive
distributions of principal in accordance with Section 4.01(d)(i),  the Class B-2
Prepayment Percentage for such Distribution Date will be zero.

            Class B-2 Principal Balance: As to the first Determination Date, the
Original Class B-2 Principal Balance.  As of any subsequent  Determination Date,
the lesser of (i) the Original  Class B-2 Principal  Balance less the sum of (a)
all amounts  previously  distributed in respect of the Class B-2 Certificates on
prior  Distribution  Dates (A) pursuant to Paragraph tenth of Section 4.01(a)(i)
and (B) as a  result  of a  Principal  Adjustment  and (b) the  Realized  Losses
allocated through such Determination Date to the Class B-2 Certificates pursuant
to  Section  4.02(b)  and (ii) the  Adjusted  Pool  Amount  as of the  preceding
Distribution  Date less the sum of the Class A  Principal  Balance and the Class
B-1 Principal Balance as of such Determination Date.

            Class B-2 Unpaid Interest  Shortfall:  As to any Distribution  Date,
the amount,  if any, by which the aggregate of the Class B-2 Interest  Shortfall
Amounts for prior Distribution Dates is in excess of the amounts  distributed in
respect of the Class B-2  Certificates on prior  Distribution  Dates pursuant to
Paragraph ninth of Section 4.01(a)(i).

            Class B-3 Certificate:  Any one of the Certificates  executed by the
Trustee  and  authenticated  by the  Trustee  or  the  Authenticating  Agent  in
substantially the form set forth in Exhibit B-3 and Exhibit C hereto.

            Class B-3  Certificateholder:  The registered  holder of a Class B-3
Certificate.

            Class B-3  Distribution  Amount:  As to any  Distribution  Date, any
amount  distributable to the Holders of the Class B-3  Certificates  pursuant to
Paragraphs eleventh, twelfth and thirteenth of Section 4.01(a)(i).

            Class B-3 Interest  Shortfall Amount:  As to any Distribution  Date,
any amount by which the Interest  Accrual  Amount of the Class B-3  Certificates
with respect to such Distribution Date exceeds the amount distributed in respect
of the Class B-3  Certificates on such  Distribution  Date pursuant to Paragraph
eleventh of Section 4.01(a)(i).

            Class B-3 Optimal Principal Amount: As to any Distribution  Date, an
amount equal to the sum, as to each Outstanding Mortgage Loan, of the product of
(x) the Non-PO Fraction with respect to such Mortgage Loan and (y) the sum of:

      (i) the Class B-3  Percentage of (A) the principal  portion of the Monthly
      Payment due on the Due Date  occurring  in the month of such  Distribution
      Date on such Mortgage  Loan,  less (B) if the  Bankruptcy  Loss Amount has
      been reduced to zero, the principal  portion of any Debt Service Reduction
      with respect to such Mortgage Loan;

      (ii) the Class B-3  Prepayment  Percentage  of all  Unscheduled  Principal
      Receipts  that were  received by a Servicer  with respect to such Mortgage
      Loan during the Applicable  Unscheduled  Principal Receipt Period relating
      to such Distribution Date for each applicable type of
      Unscheduled Principal Receipt;

      (iii) the Class  B-3  Prepayment  Percentage  of the  Scheduled  Principal
      Balance of such Mortgage Loan which,  during the month preceding the month
      of such  Distribution  Date,  was  repurchased  by the Seller  pursuant to
      Section 2.02 or 2.03; and

      (iv) the Class  B-3  Percentage  of the  excess  of the  unpaid  principal
      balance of such Mortgage Loan  substituted  for a defective  Mortgage Loan
      during  the month  preceding  the month in which  such  Distribution  Date
      occurs over the unpaid principal balance of such defective  Mortgage Loan,
      less the amount  allocable to the  principal  portion of any  unreimbursed
      Periodic Advances previously made by the applicable  Servicer,  the Master
      Servicer or the Trustee in respect of such defective Mortgage Loan;

provided,  however,  that if an Optimal  Adjustment Event occurs with respect to
such Class and such  Distribution  Date, the Class B-3 Optimal  Principal Amount
will equal the lesser of (A) the Class B-3 Optimal  Principal Amount  calculated
as described in the preceding  provisions and (B) the Adjusted Principal Balance
for the Class B-3 Certificates.

            Class B-3 Percentage:  As to any  Distribution  Date,  except as set
forth in the next  sentence,  the percentage  calculated by multiplying  (i) the
Subordinated  Percentage by (ii) a fraction, the numerator of which is the Class
B-3 Principal Balance  (determined as of the  Determination  Date preceding such
Distribution  Date)  and the  denominator  of which is the sum of the  Principal
Balances of the Classes of Class B  Certificates  eligible to receive  principal
distributions  for such  Distribution  Date in accordance with the provisions of
Section 4.01(d).  Except as set forth in Section 4.01(d)(ii),  in the event that
the  Class  B-3  Certificates  are not  eligible  to  receive  distributions  of
principal in accordance  with Section  4.01(d)(i),  the Class B-3 Percentage for
such Distribution Date will be zero.

            Class B-3 Prepayment Percentage: As to any Distribution Date, except
as set forth in the next sentence,  the percentage calculated by multiplying (i)
the  Subordinated  Prepayment  Percentage  by (ii) a fraction,  the numerator of
which is the Class B-3 Principal  Balance  (determined  as of the  Determination
Date preceding such  Distribution  Date) and the denominator of which is the sum
of the  Principal  Balances of the Classes of Class B  Certificates  eligible to
receive  principal  distributions  for such Distribution Date in accordance with
the provisions of Section 4.01(d).  Except as set forth in Section  4.01(d)(ii),
in the  event  that the Class  B-3  Certificates  are not  eligible  to  receive
distributions of principal in accordance with Section 4.01(d)(i),  the Class B-3
Prepayment Percentage for such Distribution Date will be zero.

            Class B-3 Principal Balance: As to the first Determination Date, the
Original Class B-3 Principal Balance.  As of any subsequent  Determination Date,
the lesser of (i) the Original  Class B-3 Principal  Balance less the sum of (a)
all amounts  previously  distributed in respect of the Class B-3 Certificates on
prior  Distribution  Dates (A)  pursuant  to  Paragraph  thirteenth  of  Section
4.01(a)(i)  and (B) as a result of a Principal  Adjustment  and (b) the Realized
Losses allocated through such  Determination  Date to the Class B-3 Certificates
pursuant  to  Section  4.02(b)  and  (ii) the  Adjusted  Pool  Amount  as of the
preceding  Distribution Date less the sum of the Class A Principal Balance,  the
Class B-1  Principal  Balance  and the Class B-2  Principal  Balance  as of such
Determination Date.

            Class B-3 Unpaid Interest  Shortfall:  As to any Distribution  Date,
the amount,  if any, by which the aggregate of the Class B-3 Interest  Shortfall
Amounts for prior Distribution Dates is in excess of the amounts  distributed in
respect of the Class B-3  Certificates on prior  Distribution  Dates pursuant to
Paragraph twelfth of Section 4.01(a)(i).

            Class B-4 Certificate:  Any one of the Certificates  executed by the
Trustee  and  authenticated  by the  Trustee  or  the  Authenticating  Agent  in
substantially the form set forth in Exhibit B-4 and Exhibit C hereto.

            Class B-4  Certificateholder:  The registered  holder of a Class B-4
Certificate.

            Class B-4  Distribution  Amount:  As to any  Distribution  Date, any
amount  distributable to the Holders of the Class B-4  Certificates  pursuant to
Paragraphs fourteenth, fifteenth, and sixteenth of Section 4.01(a)(i).

            Class B-4 Interest  Shortfall Amount:  As to any Distribution  Date,
any amount by which the Interest  Accrual  Amount of the Class B-4  Certificates
with respect to such Distribution Date exceeds the amount distributed in respect
of the Class B-4  Certificates on such  Distribution  Date pursuant to Paragraph
fourteenth of Section 4.01(a)(i).

            Class B-4 Optimal Principal Amount: As to any Distribution  Date, an
amount equal to the sum, as to each Outstanding Mortgage Loan, of the product of
(x) the Non-PO Fraction with respect to such Mortgage Loan and (y) the sum of:

      (i) the Class B-4  Percentage of (A) the principal  portion of the Monthly
      Payment due on the Due Date  occurring  in the month of such  Distribution
      Date on such Mortgage  Loan,  less (B) if the  Bankruptcy  Loss Amount has
      been reduced to zero, the principal  portion of any Debt Service Reduction
      with respect to such Mortgage Loan;

      (ii) the Class B-4  Prepayment  Percentage  of all  Unscheduled  Principal
      Receipts  that were  received by a Servicer  with respect to such Mortgage
      Loan during the Applicable  Unscheduled  Principal Receipt Period relating
      to such Distribution Date for each applicable type of
      Unscheduled Principal Receipt;

      (iii) the Class  B-4  Prepayment  Percentage  of the  Scheduled  Principal
      Balance of such Mortgage Loan which,  during the month preceding the month
      of such  Distribution  Date,  was  repurchased  by the Seller  pursuant to
      Section 2.02 or 2.03; and

      (iv) the Class  B-4  Percentage  of the  excess  of the  unpaid  principal
      balance of such Mortgage Loan  substituted  for a defective  Mortgage Loan
      during  the month  preceding  the month in which  such  Distribution  Date
      occurs over the unpaid principal balance of such defective  Mortgage Loan,
      less the amount  allocable to the  principal  portion of any  unreimbursed
      Periodic Advances previously made by the applicable  Servicer,  the Master
      Servicer or the Trustee in respect of such defective Mortgage Loan;

provided,  however,  that if an Optimal  Adjustment Event occurs with respect to
such Class and such  Distribution  Date, the Class B-4 Optimal  Principal Amount
will equal the lesser of (A) the Class B-4 Optimal  Principal Amount  calculated
as described in the preceding  provisions and (B) the Adjusted Principal Balance
for the Class B-4 Certificates.

            Class B-4 Percentage:  As to any  Distribution  Date,  except as set
forth in the next  sentence,  the percentage  calculated by multiplying  (i) the
Subordinated  Percentage by (ii) a fraction, the numerator of which is the Class
B-4 Principal Balance  (determined as of the  Determination  Date preceding such
Distribution  Date)  and the  denominator  of which is the sum of the  Principal
Balances of the Classes of Class B  Certificates  eligible to receive  principal
distributions  for such  Distribution  Date in accordance with the provisions of
Section 4.01(d).  Except as set forth in Section 4.01(d)(ii),  in the event that
the  Class  B-4  Certificates  are not  eligible  to  receive  distributions  of
principal in accordance  with Section  4.01(d)(i),  the Class B-4 Percentage for
such Distribution Date will be zero.

            Class B-4 Prepayment Percentage: As to any Distribution Date, except
as set forth in the next sentence,  the percentage calculated by multiplying (i)
the  Subordinated  Prepayment  Percentage  by (ii) a fraction,  the numerator of
which is the Class B-4 Principal  Balance  (determined  as of the  Determination
Date preceding such  Distribution  Date) and the denominator of which is the sum
of the  Principal  Balances of the Classes of Class B  Certificates  eligible to
receive  principal  distributions  for such Distribution Date in accordance with
the provisions of Section 4.01(d).  Except as set forth in Section  4.01(d)(ii),
in the  event  that the Class  B-4  Certificates  are not  eligible  to  receive
distributions of principal in accordance with Section 4.01(d)(i),  the Class B-4
Prepayment Percentage for such Distribution Date will be zero.

            Class B-4 Principal Balance: As to the first Determination Date, the
Original Class B-4 Principal Balance.  As of any subsequent  Determination Date,
the lesser of (i) the Original  Class B-4 Principal  Balance less the sum of (a)
all amounts  previously  distributed in respect of the Class B-4 Certificates on
prior  Distribution  Dates  (A)  pursuant  to  Paragraph  sixteenth  of  Section
4.01(a)(i)  and (B) as a result of a Principal  Adjustment  and (b) the Realized
Losses allocated through such  Determination  Date to the Class B-4 Certificates
pursuant  to  Section  4.02(b)  and  (ii) the  Adjusted  Pool  Amount  as of the
preceding  Distribution Date less the sum of the Class A Principal Balance,  the
Class B-1 Principal  Balance,  the Class B-2 Principal Balance and the Class B-3
Principal Balance as of such Determination Date.

            Class B-4 Unpaid Interest  Shortfall:  As to any Distribution  Date,
the amount,  if any, by which the aggregate of the Class B-4 Interest  Shortfall
Amounts for prior Distribution Dates is in excess of the amounts  distributed in
respect of the Class B-4  Certificates on prior  Distribution  Dates pursuant to
Paragraph fifteenth of Section 4.01(a)(i).

            Class B-5 Certificate:  Any one of the Certificates  executed by the
Trustee  and  authenticated  by the  Trustee  or  the  Authenticating  Agent  in
substantially the form set forth in Exhibit B-5 and Exhibit C hereto.

            Class B-5  Certificateholder:  The registered  holder of a Class B-5
Certificate.

            Class B-5  Distribution  Amount:  As to any  Distribution  Date, any
amount  distributable to the Holders of the Class B-5  Certificates  pursuant to
Paragraphs seventeenth, eighteenth, and nineteenth of Section 4.01(a)(i).

            Class B-5 Interest  Shortfall Amount:  As to any Distribution  Date,
any amount by which the Interest  Accrual  Amount of the Class B-5  Certificates
with respect to such Distribution Date exceeds the amount distributed in respect
of the Class B-5  Certificates on such  Distribution  Date pursuant to Paragraph
seventeenth of Section 4.01(a).

            Class B-5 Optimal Principal Amount: As to any Distribution  Date, an
amount equal to the sum, as to each Outstanding Mortgage Loan, of the product of
(x) the Non-PO Fraction with respect to such Mortgage Loan and (y) the sum of:

      (i) the Class B-5  Percentage of (A) the principal  portion of the Monthly
      Payment due on the Due Date  occurring  in the month of such  Distribution
      Date on such Mortgage  Loan,  less (B) if the  Bankruptcy  Loss Amount has
      been reduced to zero, the principal  portion of any Debt Service Reduction
      with respect to such Mortgage Loan;

      (ii) the Class B-5  Prepayment  Percentage  of all  Unscheduled  Principal
      Receipts  that were  received by a Servicer  with respect to such Mortgage
      Loan during the Applicable  Unscheduled  Principal Receipt Period relating
      to such Distribution Date for each applicable type of
      Unscheduled Principal Receipt;

      (iii) the Class  B-5  Prepayment  Percentage  of the  Scheduled  Principal
      Balance of such Mortgage Loan which,  during the month preceding the month
      of such  Distribution  Date,  was  repurchased  by the Seller  pursuant to
      Section 2.02 or 2.03; and

      (iv) the Class  B-5  Percentage  of the  excess  of the  unpaid  principal
      balance of such Mortgage Loan  substituted  for a defective  Mortgage Loan
      during  the month  preceding  the month in which  such  Distribution  Date
      occurs over the unpaid principal balance of such defective  Mortgage Loan,
      less the amount  allocable to the  principal  portion of any  unreimbursed
      Periodic Advances previously made by the applicable  Servicer,  the Master
      Servicer or the Trustee in respect of such defective Mortgage Loan;

provided,  however,  that if an Optimal  Adjustment Event occurs with respect to
such Class and such  Distribution  Date, the Class B-5 Optimal  Principal Amount
will equal the lesser of (A) the Class B-5 Optimal  Principal Amount  calculated
as described in the preceding  provisions and (B) the Adjusted Principal Balance
for the Class B-5 Certificates.

            Class B-5 Percentage:  As to any  Distribution  Date,  except as set
forth in the next  sentence,  the percentage  calculated by multiplying  (i) the
Subordinated  Percentage by (ii) a fraction, the numerator of which is the Class
B-5 Principal Balance  (determined as of the  Determination  Date preceding such
Distribution  Date)  and the  denominator  of which is the sum of the  Principal
Balances of the Classes of Class B  Certificates  eligible to receive  principal
distributions  for such  Distribution  Date in accordance with the provisions of
Section 4.01(d).  Except as set forth in Section 4.01(d)(ii),  in the event that
the  Class  B-5  Certificates  are not  eligible  to  receive  distributions  of
principal in accordance  with Section  4.01(d)(i),  the Class B-5 Percentage for
such Distribution Date will be zero.

            Class B-5 Prepayment Percentage: As to any Distribution Date, except
as set forth in the next sentence,  the percentage calculated by multiplying (i)
the  Subordinated  Prepayment  Percentage  by (ii) a fraction,  the numerator of
which is the Class B-5 Principal  Balance  (determined  as of the  Determination
Date preceding such  Distribution  Date) and the denominator of which is the sum
of the  Principal  Balances of the Classes of Class B  Certificates  eligible to
receive  principal  distributions  for such Distribution Date in accordance with
the provisions of Section 4.01(d).  Except as set forth in Section  4.01(d)(ii),
in the  event  that the Class  B-5  Certificates  are not  eligible  to  receive
distributions of principal in accordance with Section 4.01(d)(i),  the Class B-5
Prepayment Percentage for such Distribution Date will be zero.

            Class B-5 Principal Balance: As to the first Determination Date, the
Original Class B-5 Principal Balance.  As of any subsequent  Determination Date,
the lesser of (i) the Original  Class B-5 Principal  Balance less the sum of (a)
all amounts  previously  distributed in respect of the Class B-5 Certificates on
prior  Distribution  Dates (A)  pursuant  to  Paragraph  nineteenth  of  Section
4.01(a)(i)  and (B) as a result of a Principal  Adjustment  and (b) the Realized
Losses allocated through such  Determination  Date to the Class B-5 Certificates
pursuant  to  Section  4.02(b)  and  (ii) the  Adjusted  Pool  Amount  as of the
preceding  Distribution Date less the sum of the Class A Principal Balance,  the
Class B-1  Principal  Balance,  the Class B-2 Principal  Balance,  the Class B-3
Principal Balance and the Class B-4 Principal  Balance as of such  Determination
Date.

            Class B-5 Unpaid Interest  Shortfall:  As to any Distribution  Date,
the amount,  if any, by which the aggregate of the Class B-5 Interest  Shortfall
Amounts for prior Distribution Dates is in excess of the amounts  distributed in
respect of the Class B-5  Certificates on prior  Distribution  Dates pursuant to
Paragraph eighteenth of Section 4.01(a)(i).

            Class B-6 Certificate:  Any one of the Certificates  executed by the
Trustee  and  authenticated  by the  Trustee  or  the  Authenticating  Agent  in
substantially the form set forth in Exhibit B-6 and Exhibit C hereto.

            Class B-6  Certificateholder:  The registered  holder of a Class B-6
Certificate.

            Class B-6  Distribution  Amount:  As to any  Distribution  Date, any
amount  distributable to the Holders of the Class B-6  Certificates  pursuant to
Paragraphs twentieth, twenty-first and twenty-second of Section 4.01(a)(i).

            Class B-6 Interest  Shortfall Amount:  As to any Distribution  Date,
any amount by which the Interest  Accrual  Amount of the Class B-6  Certificates
with respect to such Distribution Date exceeds the amount distributed in respect
of the Class B-6  Certificates on such  Distribution  Date pursuant to Paragraph
twentieth of Section 4.01(a)(i).

            Class B-6 Optimal Principal Amount: As to any Distribution  Date, an
amount equal to the sum, as to each Outstanding Mortgage Loan, of the product of
(x) the Non-PO Fraction with respect to such Mortgage Loan and (y) the sum of:

      (i) the Class B-6  Percentage of (A) the principal  portion of the Monthly
      Payment due on the Due Date  occurring  in the month of such  Distribution
      Date on such Mortgage  Loan,  less (B) if the  Bankruptcy  Loss Amount has
      been reduced to zero, the principal  portion of any Debt Service Reduction
      with respect to such Mortgage Loan;

      (ii) the Class B-6  Prepayment  Percentage  of all  Unscheduled  Principal
      Receipts  that were  received by a Servicer  with respect to such Mortgage
      Loan during the Applicable  Unscheduled  Principal Receipt Period relating
      to such Distribution Date for each applicable type of
      Unscheduled Principal Receipt;

      (iii) the Class  B-6  Prepayment  Percentage  of the  Scheduled  Principal
      Balance of such Mortgage Loan which,  during the month preceding the month
      of such  Distribution  Date,  was  repurchased  by the Seller  pursuant to
      Section 2.02 or 2.03; and

      (iv) the Class  B-6  Percentage  of the  excess  of the  unpaid  principal
      balance of such Mortgage Loan  substituted  for a defective  Mortgage Loan
      during  the month  preceding  the month in which  such  Distribution  Date
      occurs over the unpaid principal balance of such defective  Mortgage Loan,
      less the amount  allocable to the  principal  portion of any  unreimbursed
      Periodic Advances previously made by the applicable  Servicer,  the Master
      Servicer or the Trustee in respect of such defective Mortgage Loan;

provided,  however,  that if an Optimal  Adjustment Event occurs with respect to
such Class and such  Distribution  Date, the Class B-6 Optimal  Principal Amount
will equal the lesser of (A) the Class B-6 Optimal  Principal Amount  calculated
as described in the preceding  provisions and (B) the Adjusted Principal Balance
for the Class B-6 Certificates.

            Class B-6 Percentage:  As to any  Distribution  Date,  except as set
forth in the next  sentence,  the percentage  calculated by multiplying  (i) the
Subordinated  Percentage by (ii) a fraction, the numerator of which is the Class
B-6 Principal Balance  (determined as of the  Determination  Date preceding such
Distribution  Date)  and the  denominator  of which is the sum of the  Principal
Balances of the Classes of Class B  Certificates  eligible to receive  principal
distributions  for such  Distribution  Date in accordance with the provisions of
Section 4.01(d).  Except as set forth in Section 4.01(d)(ii),  in the event that
the  Class  B-6  Certificates  are not  eligible  to  receive  distributions  of
principal in accordance with the provisions of Section 4.01(d)(i), the Class B-6
Percentage for such Distribution Date will be zero.

            Class B-6 Prepayment Percentage: As to any Distribution Date, except
as set forth in the next sentence,  the percentage calculated by multiplying (i)
the  Subordinated  Prepayment  Percentage  by (ii) a fraction,  the numerator of
which is the Class B-6 Principal  Balance  (determined  as of the  Determination
Date preceding such  Distribution  Date) and the denominator of which is the sum
of the  Principal  Balances of the Classes of Class B  Certificates  eligible to
receive  principal  distributions  for such Distribution Date in accordance with
the provisions of Section 4.01(d).  Except as set forth in Section  4.01(d)(ii),
in the  event  that the Class  B-6  Certificates  are not  eligible  to  receive
distributions  of  principal  in  accordance  with  the  provisions  of  Section
4.01(d)(i),  the Class B-6 Prepayment Percentage for such Distribution Date will
be zero.

            Class B-6 Principal Balance: As to the first Determination Date, the
Original Class B-6 Principal Balance.  As of any subsequent  Determination Date,
the lesser of (i) the Original  Class B-6 Principal  Balance less the sum of (a)
all amounts  previously  distributed in respect of the Class B-6 Certificates on
prior  Distribution  Dates  pursuant  to  Paragraph   twenty-second  of  Section
4.01(a)(i) and (b) the Realized Losses allocated through such Determination Date
to the Class B-6 Certificates  pursuant to Section 4.02(b) and (ii) the Adjusted
Pool  Amount as of the  preceding  Distribution  Date less the Class A Principal
Balance,  the Class B-1 Principal Balance,  the Class B-2 Principal Balance, the
Class B-3 Principal  Balance,  the Class B-4 Principal Balance and the Class B-5
Principal Balance as of such Determination Date.

            Class B-6 Unpaid Interest  Shortfall:  As to any Distribution  Date,
the amount,  if any, by which the aggregate of the Class B-6 Interest  Shortfall
Amounts for prior Distribution Dates is in excess of the amounts  distributed in
respect of the Class B-6  Certificates on prior  Distribution  Dates pursuant to
Paragraph twenty-first of Section 4.01(a)(i).

            Class B-L1  Interest:  A regular  interest in the  Lower-Tier  REMIC
which is held as an asset of the  Upper-Tier  REMIC and is  entitled  to monthly
distributions as provided in Section 4.01(a)(ii) hereof.

            Class B-L2  Interest:  A regular  interest in the  Lower-Tier  REMIC
which is held as an asset of the  Upper-Tier  REMIC and is  entitled  to monthly
distributions as provided in Section 4.01(a)(ii) hereof.

            Class B-L3  Interest:  A regular  interest in the  Lower-Tier  REMIC
which is held as an asset of the  Upper-Tier  REMIC and is  entitled  to monthly
distributions as provided in Section 4.01(a)(ii) hereof.

            Class B-L4  Interest:  A regular  interest in the  Lower-Tier  REMIC
which is held as an asset of the  Upper-Tier  REMIC and is  entitled  to monthly
distributions as provided in Section 4.01(a)(ii) hereof.

            Class B-L5  Interest:  A regular  interest in the  Lower-Tier  REMIC
which is held as an asset of the  Upper-Tier  REMIC and is  entitled  to monthly
distributions as provided in Section 4.01(a)(ii) hereof.

            Class B-L6  Interest:  A regular  interest in the  Lower-Tier  REMIC
which is held as an asset of the  Upper-Tier  REMIC and is  entitled  to monthly
distributions as provided in Section 4.01(a)(ii) hereof.

            Clearing  Agency:   An  organization   registered  as  a  "clearing
agency"  pursuant to  Section 17A  of the  Securities  Exchange Act of 1934, as
amended. The initial Clearing Agency shall be The Depository Trust Company.

            Clearing  Agency  Participant:  A broker,  dealer,  bank,  financial
institution  or other  Person  for whom a  Clearing  Agency  effects  book-entry
transfers of securities deposited with the Clearing Agency.

            Closing  Date:  The date of initial  issuance of the  Certificates,
as set forth in Section 11.21.

            Code:  The Internal  Revenue Code of 1986, as it may be amended from
time to time, any successor statutes thereto,  and applicable U.S. Department of
the Treasury temporary or final regulations promulgated thereunder.

            Compensating  Interest:  As to any Distribution  Date, the lesser of
(a) the  product  of (i) 1/12th of 0.20% and (ii) the Pool  Scheduled  Principal
Balance  for such  Distribution  Date  and (b) the  Available  Master  Servicing
Compensation for such Distribution Date.

            Co-op  Shares:   Shares  issued  by  private   non-profit   housing
corporations.

            Corporate Trust Office: The principal office of the Trustee at which
at any particular time its corporate trust business shall be administered, which
office,  at the date of the execution of this instrument is located at 230 South
Tryon Street, Charlotte, North Carolina 28288.

            Corresponding  Upper-Tier  Class or  Classes:  As to the  following
Uncertificated  Lower-Tier  Interests,  the  Corresponding  Upper-Tier Class or
Classes as follows:



   Uncertificated Lower-Tier Interest  Corresponding Upper-Tier Class or Classes
   ----------------------------------  -----------------------------------------

   Class A-L1 Interest                 Class A-1 Certificates, Class A-2
                                       Certificates, Class A-3 Certificates,
                                       Class A-4 Certificates and Class A-11
                                       Certificates.

   Class A-L5 Interest                 Class A-5 Certificates and Class A-6
                                       Certificates

   Class A-L7 Interest                 Class A-7 Certificates and Class A-10
                                       Certificates

   Class A-L8 Interest                 Class A-8 Certificates and Class A-9
                                       Certificates

   Class A-L12 Interest                Class A-12 Certificates and Class A-13
                                       Certificates

   Class A-L14 Interest                Class A-14 Certificates

   Class A-LPO Interest                Class A-PO Certificates

   Class A-LUR Interest                Class A-R Certificate

   Class B-L1 Interest                 Class B-1 Certificates

   Class B-L2 Interest                 Class B-2 Certificates

   Class B-L3 Interest                 Class B-3 Certificates

   Class B-L4 Interest                 Class B-4 Certificates

   Class B-L5 Interest                 Class B-5 Certificates

   Class B-L6 Interest                 Class B-6 Certificates

            Cross-Over   Date:  The   Distribution   Date  preceding  the  first
Distribution Date on which the Class A Percentage (determined pursuant to clause
(ii) of the definition thereof) equals or exceeds 100%.

            Cross-Over Date Interest Shortfall: With respect to any Distribution
Date that occurs on or after the Cross-Over Date with respect to any Unscheduled
Principal Receipt (other than a Prepayment in Full):

            (A)   in the case where the Applicable Unscheduled Principal Receipt
                  Period is the Mid-Month  Receipt  Period and such  Unscheduled
                  Principal  Receipt is received by the Servicer on or after the
                  Determination  Date in the month  preceding  the month of such
                  Distribution  Date but  prior to the first day of the month of
                  such Distribution Date, the amount of interest that would have
                  accrued  at the Net  Mortgage  Interest  Rate on the amount of
                  such Unscheduled Principal Receipt from the day of its receipt
                  or, if earlier,  its  application by the Servicer  through the
                  last day of the month preceding the month of such Distribution
                  Date; and

            (B)   in the case where the Applicable Unscheduled Principal Receipt
                  Period is the Prior Month Receipt Period and such  Unscheduled
                  Principal Receipt is received by the Servicer during the month
                  preceding the month of such  Distribution  Date, the amount of
                  interest that would have accrued at the Net Mortgage  Interest
                  Rate on the amount of such Unscheduled  Principal Receipt from
                  the day of its receipt or, if earlier,  its application by the
                  Servicer  through  the  last day of the  month  in which  such
                  Unscheduled Principal Receipt is received.

            Current Class A Interest Distribution Amount: As to any Distribution
Date,  the amount  distributed in respect of the Classes of Class A Certificates
pursuant to Paragraph first of Section 4.01(a)(i) on such Distribution Date.

            Current Class B Interest Distribution Amount: As to any Distribution
Date,  the amount  distributed in respect of the Classes of Class B Certificates
pursuant to Paragraphs  fifth,  eighth,  eleventh,  fourteenth,  seventeenth and
twentieth of Section 4.01(a)(i) on such Distribution Date.

            Current Class B-1 Fractional  Interest:  As to any Distribution Date
subsequent to the first Distribution  Date, the percentage  obtained by dividing
the sum of the Principal  Balances of the Class B-2, Class B-3, Class B-4, Class
B-5 and  Class  B-6  Certificates  by the sum of the  Class A  Non-PO  Principal
Balance and the Class B Principal  Balance.  As to the first  Distribution Date,
the Original Class B-1 Fractional Interest.

            Current Class B-2 Fractional  Interest:  As to any Distribution Date
subsequent to the first Distribution  Date, the percentage  obtained by dividing
the sum of the  Principal  Balances of the Class B-3,  Class B-4,  Class B-5 and
Class B-6  Certificates by the sum of the Class A Non-PO  Principal  Balance and
the Class B Principal  Balance.  As to the first Distribution Date, the Original
Class B-2 Fractional Interest.

            Current Class B-3 Fractional  Interest:  As to any Distribution Date
subsequent to the first Distribution  Date, the percentage  obtained by dividing
the sum of the  Principal  Balances  of the Class  B-4,  Class B-5 and Class B-6
Certificates by the sum of the Class A Non-PO Principal  Balance and the Class B
Principal  Balance.  As to the first  Distribution  Date, the Original Class B-3
Fractional Interest.

            Current Class B-4 Fractional  Interest:  As to any Distribution Date
subsequent to the first Distribution  Date, the percentage  obtained by dividing
the sum of the Principal Balances of the Class B-5 and Class B-6 Certificates by
the sum of the  Class A  Non-PO  Principal  Balance  and the  Class B  Principal
Balance.  As to the first  Distribution  Date, the Original Class B-4 Fractional
Interest.

            Current Class B-5 Fractional  Interest:  As to any Distribution Date
subsequent to the first Distribution  Date, the percentage  obtained by dividing
the Principal  Balance of the Class B-6  Certificates  by the sum of the Class A
Non-PO  Principal  Balance  and the Class B Principal  Balance.  As to the first
Distribution Date, the Original Class B-5 Fractional Interest.

            Curtailment:  Any Principal  Prepayment made by a Mortgagor which is
not a Prepayment in Full.

            Custodial Agreement:  The Custodial Agreement,  if any, from time to
time in effect  between the  Custodian  named  therein,  the Seller,  the Master
Servicer and the Trustee,  substantially in the form of Exhibit E hereto, as the
same may be amended or modified from time to time in  accordance  with the terms
thereof.

            Custodial P&I Account: The Custodial P&I Account, as defined in each
of the Servicing Agreements,  with respect to the Mortgage Loans. In determining
whether the Custodial P&I Account under any Servicing  Agreement is "acceptable"
to the Master  Servicer  (as may be  required  by the  definition  of  "Eligible
Account"  contained in the  Servicing  Agreements),  the Master  Servicer  shall
require  that  any  such  account  shall  be  acceptable  to each of the  Rating
Agencies.

            Custodian:  Initially, the Trustee, and thereafter the Custodian, if
any,  hereafter  appointed  by the  Trustee  pursuant  to Section  8.13,  or its
successor in interest under the Custodial Agreement. The Custodian may (but need
not)  be the  Trustee  or any  Person  directly  or  indirectly  controlling  or
controlled by or under common control of either of them. Neither a Servicer, nor
the  Seller nor the  Master  Servicer  nor any  Person  directly  or  indirectly
controlling or controlled by or under common control with any such Person may be
appointed Custodian.

            Cut-Off Date: The first day of the month of initial  issuance of the
Certificates as set forth in Section 11.02.

            Cut-Off Date  Aggregate  Principal  Balance:  The  aggregate of the
Cut-Off  Date  Principal  Balances  of the  Mortgage  Loans is as set  forth in
Section 11.03.

            Cut-Off Date Principal Balance: As to each Mortgage Loan, its unpaid
principal  balance as of the close of business on the Cut-Off  Date (but without
giving effect to any Unscheduled  Principal  Receipts received or applied on the
Cut-Off Date), reduced by all payments of principal due on or before the Cut-Off
Date and not paid, and increased by scheduled  monthly payments of principal due
after the Cut-Off  Date but  received  by the related  Servicer on or before the
Cut-Off Date.

            DCR:  Duff  and  Phelps  Credit  Rating  Co.,  or its  successor  in
interest.

            Debt  Service  Reduction:  With  respect  to any  Mortgage  Loan,  a
reduction in the scheduled  Monthly Payment for such Mortgage Loan by a court of
competent  jurisdiction in a proceeding under the Bankruptcy Code, except such a
reduction constituting a Deficient Valuation.

            Deficient Valuation:  With respect to any Mortgage Loan, a valuation
by a court of competent jurisdiction of the Mortgaged Property in an amount less
than the then-outstanding indebtedness under the Mortgage Loan, or any reduction
in the amount of principal to be paid in connection  with any scheduled  Monthly
Payment that results in a permanent forgiveness of principal, which valuation or
reduction results from a proceeding under the Bankruptcy Code.

            Definitive Certificates:  As defined in Section 5.01(b).

            Denomination:  The  amount,  if any,  specified  on the face of each
Certificate  (other than the Class A-6 Certificates)  representing the principal
portion of the  Cut-Off  Date  Aggregate  Principal  Balance  evidenced  by such
Certificate. As to the Class A-6 Certificates,  the amount specified on the face
of such Certificate  representing the portion of the Original Class A-6 Notional
Amount.

            Determination  Date:  The 17th day of the month in which the related
Distribution  Date  occurs,  or if such  17th  day is not a  Business  Day,  the
Business Day preceding such 17th day.

            Discount Mortgage Loan: A Mortgage Loan with a Net Mortgage Interest
Rate of less than 6.500%.

            Distribution Date: The 25th day of any month, beginning in the month
following the month of initial issuance of the Certificates, or if such 25th day
is not a Business Day, the Business Day following such 25th day.

            Due Date: With respect to any Mortgage Loan, the day of the month in
which the Monthly Payment on such Mortgage Loan is scheduled to be paid.

            Eligible Account:  One or more accounts (i) that are maintained with
a depository institution (which may be the Master Servicer) whose long-term debt
obligations  (or,  in the case of a  depository  institution  which is part of a
holding company structure, the long-term debt obligations of such parent holding
company)  at the  time of  deposit  therein  are  rated  at  least  "AA" (or the
equivalent) by each of the Rating Agencies, (ii) the deposits in which are fully
insured  by the FDIC  through  either  the Bank  Insurance  Fund or the  Savings
Association  Insurance Fund, (iii) the deposits in which are insured by the FDIC
through either the Bank Insurance Fund or the Savings Association Insurance Fund
(to the  limit  established  by the FDIC) and the  uninsured  deposits  in which
accounts are otherwise secured,  as evidenced by an Opinion of Counsel delivered
to the Trustee, such that the Trustee, on behalf of the Certificateholders has a
claim with respect to the funds in such accounts or a perfected  first  security
interest  against any collateral  securing such funds that is superior to claims
of any other  depositors or creditors of the depository  institution  with which
such accounts are maintained,  (iv) that are trust accounts  maintained with the
trust department of a federal or state chartered depository institution or trust
company  acting in its  fiduciary  capacity  or (v) such other  account  that is
acceptable  to each of the Rating  Agencies and would not cause the Trust Estate
to fail to qualify as two  separate  REMICs or result in the  imposition  of any
federal tax on either of the Upper-Tier REMIC or the Lower-Tier REMIC.

            Eligible Investments:  At any time, any one or more of the following
obligations  and  securities  which shall mature not later than the Business Day
preceding the  Distribution  Date next  succeeding the date of such  investment,
provided that such investments continue to qualify as "cash flow investments" as
defined in Code Section 860G(a)(6):

      (i)  obligations  of the United  States of America or any agency  thereof,
      provided such  obligations  are backed by the full faith and credit of the
      United States of America;

      (ii) general obligations of or obligations  guaranteed by any state of the
      United States of America or the District of Columbia receiving the highest
      short-term  or highest  long-term  rating of each Rating  Agency,  or such
      lower rating as would not result in the  downgrading  or withdrawal of the
      rating then assigned to any of the Certificates by either Rating Agency or
      result in any of such rated  Certificates  being  placed on credit  review
      status (other than for possible upgrading) by either Rating Agency;

      (iii)  commercial  or  finance  company  paper  which is then rated in the
      highest  long-term  commercial or finance company paper rating category of
      each  Rating  Agency or the  highest  short-term  rating  category of each
      Rating  Agency,  or such lower rating  category as would not result in the
      downgrading  or  withdrawal  of the  rating  then  assigned  to any of the
      Certificates  by either  Rating  Agency  or  result  in any of such  rated
      Certificates being placed on credit review status (other than for possible
      upgrading) by either Rating Agency;

      (iv)  certificates of deposit,  demand or time deposits,  federal funds or
      banker's acceptances issued by any depository institution or trust company
      incorporated  under the laws of the United  States or of any state thereof
      and subject to supervision and examination by federal and/or state banking
      authorities, provided that the commercial paper and/or debt obligations of
      such  depository  institution  or  trust  company  (or in the  case of the
      principal  depository   institution  in  a  holding  company  system,  the
      commercial  paper or debt  obligations  of such holding  company) are then
      rated in the highest  short-term or the highest  long-term rating category
      for such securities of each of the Rating  Agencies,  or such lower rating
      categories  as would not result in the  downgrading  or  withdrawal of the
      rating then assigned to any of the Certificates by either Rating Agency or
      result in any of such rated  Certificates  being  placed on credit  review
      status (other than for possible upgrading) by either Rating Agency;

      (v)  guaranteed  reinvestment  agreements  issued by any  bank,  insurance
      company or other corporation  acceptable to each Rating Agency at the time
      of the issuance of such agreements;

      (vi)  repurchase  agreements on  obligations  with respect to any security
      described  in clauses  (i) or (ii) above or any other  security  issued or
      guaranteed  by an  agency  or  instrumentality  of the  United  States  of
      America,  in either case  entered into with a  depository  institution  or
      trust company (acting as principal) described in (iv) above;

      (vii) securities (other than stripped bonds or stripped coupon securities)
      bearing  interest  or  sold  at  a  discount  issued  by  any  corporation
      incorporated  under the laws of the United  States of America or any state
      thereof which,  at the time of such  investment or contractual  commitment
      providing for such investment, are then rated in the highest short-term or
      the highest  long-term  rating category by each Rating Agency,  or in such
      lower rating category as would not result in the downgrading or withdrawal
      of the rating then  assigned to any of the  Certificates  by either Rating
      Agency or result in any of such rated  Certificates being placed on credit
      review status (other than for possible upgrading) by either Rating Agency;
      and

      (viii) such other  investments  acceptable  to each Rating Agency as would
      not  result  in  the  downgrading  of  the  rating  then  assigned  to the
      Certificates  by either  Rating  Agency  or  result  in any of such  rated
      Certificates being placed on credit review status (other than for possible
      upgrading) by either Rating Agency.

            In no event shall an  instrument  be an Eligible  Investment if such
instrument  evidences either (i) a right to receive only interest  payments with
respect to the obligations  underlying such  instrument,  or (ii) both principal
and interest  payments derived from  obligations  underlying such instrument and
the interest and principal  payments with respect to such  instrument  provide a
yield to maturity at the date of investment of greater than 120% of the yield to
maturity at par of such underlying obligations.

            ERISA:  The Employee  Retirement  Income  Security  Act of 1974,  as
amended.

            ERISA Prohibited Holder:  As defined in Section 5.02(d).

            Errors and  Omissions  Policy:  As defined in each of the  Servicing
Agreements.

            Event of Default:  Any of the events specified in Section 7.01.

            Excess  Bankruptcy Loss: With respect to any  Distribution  Date and
any  Mortgage  Loan as to  which a  Bankruptcy  Loss is  realized  in the  month
preceding the month of such  Distribution  Date,  (i) if the  Aggregate  Current
Bankruptcy   Losses  with   respect  to  such   Distribution   Date  exceed  the
then-applicable Bankruptcy Loss Amount, then the portion of such Bankruptcy Loss
represented by the ratio of (a) the excess of the Aggregate  Current  Bankruptcy
Losses  over the  then-applicable  Bankruptcy  Loss  Amount,  divided by (b) the
Aggregate Current  Bankruptcy Losses or (ii) if the Aggregate Current Bankruptcy
Losses  with  respect  to such  Distribution  Date are less than or equal to the
then-applicable  Bankruptcy Loss Amount, then zero. In addition,  any Bankruptcy
Loss occurring  with respect to a Mortgage Loan on or after the Cross-Over  Date
will be an Excess Bankruptcy Loss.

            Excess  Fraud Loss:  With respect to any  Distribution  Date and any
Mortgage  Loan as to which a Fraud Loss is realized in the month  preceding  the
month of such Distribution  Date, (i) if the Aggregate Current Fraud Losses with
respect to such Distribution Date exceed the then-applicable  Fraud Loss Amount,
then the portion of such Fraud Loss  represented  by the ratio of (a) the excess
of the  Aggregate  Current  Fraud  Losses  over the  then-applicable  Fraud Loss
Amount,  divided  by (b) the  Aggregate  Current  Fraud  Losses,  or (ii) if the
Aggregate  Current Fraud Losses with respect to such  Distribution Date are less
than or equal to the then-applicable  Fraud Loss Amount, then zero. In addition,
any  Fraud  Loss  occurring  with  respect  to a  Mortgage  Loan on or after the
Cross-Over Date will be an Excess Fraud Loss.

            Excess Special Hazard Loss:  With respect to any  Distribution  Date
and any Mortgage Loan as to which a Special Hazard Loss is realized in the month
preceding the month of such  Distribution  Date,  (i) if the  Aggregate  Current
Special  Hazard  Losses  with  respect  to such  Distribution  Date  exceed  the
then-applicable  Special  Hazard Loss  Amount,  then the portion of such Special
Hazard Loss represented by the ratio of (a) the excess of the Aggregate  Current
Special  Hazard  Losses over the  then-applicable  Special  Hazard Loss  Amount,
divided by (b) the  Aggregate  Current  Special  Hazard  Losses,  or (ii) if the
Aggregate  Current Special Hazard Losses with respect to such  Distribution Date
are less than or equal to the  then-applicable  Special Hazard Loss Amount, then
zero. In addition,  any Special Hazard Loss occurring with respect to a Mortgage
Loan on or after the Cross-Over Date will be an Excess Special Hazard Loss.

            Exhibit F-1 Mortgage Loan:  Any of the Mortgage Loans  identified in
Exhibit  F-1  hereto,  as  such  Exhibit  may be  amended  from  time to time in
connection with a substitution  pursuant to Section 2.02, which Mortgage Loan is
serviced in locations other than Frederick, Maryland under the Norwest Servicing
Agreement.

            Exhibit F-2 Mortgage Loan:  Any of the Mortgage Loans  identified in
Exhibit  F-2  hereto,  as  such  Exhibit  may be  amended  from  time to time in
connection with a substitution  pursuant to Section 2.02, which Mortgage Loan is
serviced in Frederick, Maryland under the Norwest Servicing Agreement.

            Exhibit F-3 Mortgage Loan:  Any of the Mortgage Loans  identified in
Exhibit  F-3  hereto,  as  such  Exhibit  may be  amended  from  time to time in
connection with a substitution  pursuant to Section 2.02, which Mortgage Loan is
serviced under an Other Servicing Agreement.

            FDIC:  The Federal  Deposit  Insurance  Corporation or any successor
thereto.

            FHLMC:  The Federal Home Loan Mortgage  Corporation or any successor
thereto.

            Fidelity Bond:  As defined in each of the Servicing Agreements.

            Final  Distribution  Date: The Distribution  Date on which the final
distribution in respect of the Certificates is made pursuant to Section 9.01.

            Final Scheduled Maturity Date: The Final Scheduled Maturity Date for
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,  Class A-11,  Class A-12,  Class A-13,  Class
A-14,  Class A-PO, Class A-R, Class A-LR, Class B-1, Class B-2, Class B-3, Class
B-4, Class B-5 and Class B-6 Certificates is June 25, 2029 which  corresponds to
the "latest  possible  maturity date" for purposes of Section  860G(a)(1) of the
Internal Revenue Code of 1986, as amended.

            Fixed  Retained  Yield:  The fixed  percentage  of  interest on each
Mortgage Loan with a Mortgage  Interest Rate greater than the sum of (a) 6.500%,
(b) the Servicing Fee Rate and (c) the Master  Servicing Fee Rate, which will be
determined on a loan by loan basis and will equal the Mortgage  Interest Rate on
each Mortgage  Loan minus the sum of (a), (b) and (c),  which is not assigned to
and not part of the Trust Estate.

            Fixed Retained Yield Rate: With respect to each Mortgage Loan, a per
annum rate equal to the greater of (a) zero and (b) the Mortgage  Interest  Rate
on such Mortgage  Loan minus the sum of (i) 6.500%,  (ii) the Servicing Fee Rate
and (iii) the Master Servicing Fee Rate.

            FNMA:  Fannie Mae or any successor thereto.

            Foreclosure  Profits:  As to any Distribution  Date, the excess,  if
any,  of (i) Net  Liquidation  Proceeds  in respect of each  Mortgage  Loan that
became a Liquidated  Loan during the Applicable  Unscheduled  Principal  Receipt
Period with respect to Full Unscheduled Principal Receipts for such Distribution
Date over (ii) the sum of the unpaid  principal  balance of each such Liquidated
Loan plus accrued and unpaid interest at the applicable  Mortgage  Interest Rate
on the unpaid principal  balance thereof from the Due Date to which interest was
last paid by the Mortgagor  (or, in the case of a Liquidated  Loan that had been
an REO  Mortgage  Loan,  from the Due Date to which  interest was last deemed to
have been  paid) to the first day of the month in which such  Distribution  Date
occurs.

            Fraud  Loss:  A  Liquidated  Loan Loss as to which  there was fraud
in the origination of such Mortgage Loan.

            Fraud Loss  Amount:  As of any  Distribution  Date after the Cut-Off
Date an amount equal to: (X) prior to the first  anniversary of the Cut-Off Date
an amount  equal to  $6,003,264.37  minus the  aggregate  amount of Fraud Losses
allocated  solely to the Class B Certificates in accordance with Section 4.02(a)
since the Cut-Off 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  outstanding  principal balance of all of the Mortgage Loans as of the
most recent anniversary of the Cut-Off Date minus (2) the Fraud Losses allocated
solely to the Class B Certificates  in accordance with Section 4.02(a) since the
most recent anniversary of the Cut-Off Date. On and after the Cross-Over Date or
after the fifth  anniversary  of the Cut-Off Date the Fraud Loss Amount shall be
zero.

            Full  Unscheduled   Principal  Receipt:  Any  Unscheduled  Principal
Receipt  with  respect to a Mortgage  Loan (i) in the amount of the  outstanding
principal  balance of such Mortgage Loan and resulting in the full  satisfaction
of such  Mortgage  Loan or (ii)  representing  Liquidation  Proceeds  other than
Partial Liquidation Proceeds.

            Holder:  See "Certificateholder."

            Independent:  When used with respect to any specified  Person,  such
Person who (i) is in fact independent of the Seller, the Master Servicer and any
Servicer,  (ii) does not have any  direct  financial  interest  or any  material
indirect financial interest in the Seller or the Master Servicer or any Servicer
or in an affiliate of either,  and (iii) is not connected  with the Seller,  the
Master Servicer or any Servicer as an officer, employee, promoter,  underwriter,
trustee, partner, director or person performing similar functions.

            Insurance  Policy:  Any insurance or performance  bond relating to a
Mortgage Loan or the Mortgage  Loans,  including any hazard  insurance,  special
hazard  insurance,  flood  insurance,  primary  mortgage  insurance,   mortgagor
bankruptcy bond or title insurance.

            Insurance  Proceeds:  Proceeds  paid by any insurer  pursuant to any
Insurance Policy covering a Mortgage Loan.

            Insured Expenses:  Expenses covered by any Insurance Policy covering
a Mortgage Loan.

            Interest Accrual Amount:  As to any Distribution  Date and any Class
of Class A Certificates  (other than the Class A-6 and Class A-PO Certificates),
(a) the  product of (i) 1/12th of the Class A  Pass-Through  Rate for such Class
and (ii) the  Principal  Balance  of such  Class  as of the  Determination  Date
preceding such  Distribution  Date minus (b) the Class A Interest  Percentage of
such Class of (i) any Non-Supported  Interest Shortfall allocated to the Class A
Certificates with respect to such  Distribution  Date, (ii) the interest portion
of any Excess Special Hazard Losses,  Excess Fraud Losses and Excess  Bankruptcy
Losses allocated to the Class A Certificates  with respect to such  Distribution
Date pursuant to Section 4.02(e) and (iii) the interest  portion of any Realized
Losses (other than Excess Special Hazard Losses,  Excess Fraud Losses and Excess
Bankruptcy  Losses)  allocated  to the  Class A  Certificates  on or  after  the
Cross-Over Date pursuant to Section 4.02(e). As to any Distribution Date and the
Class A-6  Certificates,  the Class A-6 Interest Accrual Amount.  The Class A-PO
Certificates have no Interest Accrual Amount.

            As to any  Distribution  Date and any Class of Class B Certificates,
an amount  equal to (i) the product of 1/12th of the Class B  Pass-Through  Rate
and the Principal Balance of such Class as of the  Determination  Date preceding
such Distribution Date minus (ii) the Class B Interest  Percentage of such Class
of  (x)  any  Non-Supported   Interest  Shortfall   allocated  to  the  Class  B
Certificates with respect to such Distribution Date and (y) the interest portion
of any Excess Special Hazard Losses,  Excess Fraud Losses and Excess  Bankruptcy
Losses allocated to the Class B Certificates  with respect to such  Distribution
Date pursuant to Section 4.02(e).

            LIBOR:  As to any  Distribution  Date,  the  arithmetic  mean of the
London Interbank offered rate quotations for one month Eurodollar  deposits,  as
determined by the Trustee on the related Rate  Determination  Date in accordance
with Section 4.07.

            LIBOR  Business  Day:  Any  Business Day on which banks are open for
dealing in foreign  currency  and exchange in London,  England,  the City of New
York and Charlotte, North Carolina.

            LIBOR   Certificates:   Any  of   the   Class A-5   and   Class A-6
Certificates.

            Liquidated  Loan: A Mortgage  Loan with respect to which the related
Mortgaged Property has been acquired,  liquidated or foreclosed and with respect
to which the applicable Servicer determines that all Liquidation  Proceeds which
it expects to recover have been recovered.

            Liquidated  Loan Loss:  With respect to any  Distribution  Date, the
aggregate  of the  amount of losses  with  respect to each  Mortgage  Loan which
became a Liquidated  Loan during the Applicable  Unscheduled  Principal  Receipt
Period with respect to Full Unscheduled Principal Receipts for such Distribution
Date,  equal to the  excess of (i) the  unpaid  principal  balance  of each such
Liquidated   Loan,  plus  accrued   interest  thereon  in  accordance  with  the
amortization  schedule  at the time  applicable  thereto at the  applicable  Net
Mortgage Interest Rate from the Due Date as to which interest was last paid with
respect  thereto  through the last day of the month preceding the month in which
such Distribution Date occurs,  over (ii) Net Liquidation  Proceeds with respect
to such Liquidated Loan.

            Liquidation Expenses:  Expenses incurred by a Servicer in connection
with the  liquidation  of any defaulted  Mortgage  Loan or property  acquired in
respect  thereof  (including,  without  limitation,  legal  fees  and  expenses,
committee  or referee  fees,  and,  if  applicable,  brokerage  commissions  and
conveyance taxes), any unreimbursed  advances expended by such Servicer pursuant
to its Servicing  Agreement or the Master  Servicer or Trustee  pursuant  hereto
respecting the related Mortgage Loan,  including any  unreimbursed  advances for
real property taxes or for property  restoration or  preservation of the related
Mortgaged  Property.  Liquidation  Expenses  shall not  include  any  previously
incurred  expenses  in respect of an REO  Mortgage  Loan which have been  netted
against related REO Proceeds.

            Liquidation  Proceeds:  Amounts  received  by a Servicer  (including
Insurance  Proceeds) 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 such Mortgage Loans received
from the  Mortgagor,  other than  amounts  required to be paid to the  Mortgagor
pursuant  to the terms of the  applicable  Mortgage  or to be applied  otherwise
pursuant to law.

            Loan-to-Value  Ratio:  The ratio,  expressed  as a  percentage,  the
numerator of which is the  principal  balance of a particular  Mortgage  Loan at
origination  and the  denominator  of which is the  lesser of (x) the  appraised
value of the related Mortgaged Property  determined in the appraisal used by the
originator  at the time of  origination  of such Mortgage  Loan,  and (y) if the
Mortgage is originated in connection with a sale of the Mortgaged Property,  the
sale price for such Mortgaged Property.

            Lower-Tier Distribution Amount: As defined in Section 4.01(a)(ii).

            Lower-Tier  REMIC:  One of two separate REMICs  comprising the Trust
Estate,  the assets of which  consist of the  Mortgage  Loans  (other than Fixed
Retained  Yield),  such  amounts  as  shall  from  time  to  time be held in the
Certificate  Account (other than Fixed Retained Yield), the insurance  policies,
if any,  relating to a Mortgage Loan and property  which secured a Mortgage Loan
and which has been acquired by foreclosure or deed in lieu of foreclosure.

            Master Servicer:  Norwest Bank Minnesota,  National Association,  or
its successor in interest.

            Master  Servicing  Fee:  With respect to any  Mortgage  Loan and any
Distribution  Date, the fee payable monthly to the Master  Servicer  pursuant to
Section 6.05 equal to a fixed percentage  (expressed as a per annum rate) of the
unpaid principal balance of such Mortgage Loan.

            Master Servicing Fee Rate:  As set forth in Section 11.26.

            Mid-Month Receipt Period:  With respect to each  Distribution  Date,
the one month period beginning on the Determination Date (or, in the case of the
first Distribution  Date, from and including the Cut-Off-Date)  occurring in the
calendar month  preceding the month in which such  Distribution  Date occurs and
ending on the day preceding the  Determination  Date immediately  preceding such
Distribution Date.

            Month End Interest:  As defined in each Servicing Agreement.

            Moody's:  Moody's  Investors  Service,  Inc.,  or its  successor  in
interest.

            Monthly Payment: As to any Mortgage Loan (including any REO Mortgage
Loan) and any Due Date,  the payment of  principal  and  interest due thereon in
accordance with the amortization  schedule at the time applicable thereto (after
adjustment for any Curtailments and Deficient Valuations occurring prior to such
Due Date but before any adjustment to such amortization schedule, other than for
Deficient  Valuations,  by reason of any bankruptcy or similar proceeding or any
moratorium or similar waiver or grace period).

            Mortgage: The mortgage, deed of trust or other instrument creating a
first lien on Mortgaged  Property  securing a Mortgage  Note  together  with any
Mortgage Loan Rider, if applicable.

            Mortgage  Interest Rate: As to any Mortgage Loan, the per annum rate
at which interest accrues on the unpaid  principal  balance thereof as set forth
in the related  Mortgage  Note,  which rate is as indicated on the Mortgage Loan
Schedule.

            Mortgage  Loan  Purchase  Agreement:   The  mortgage  loan  purchase
agreement dated as of May 28, 1999 between Norwest Mortgage,  as seller, and the
Seller, as purchaser.

            Mortgage Loan Rider: The standard  FNMA/FHLMC riders to the Mortgage
Note  and/or  Mortgage  riders  required  when  the  Mortgaged   Property  is  a
condominium unit or a unit in a planned unit development.

            Mortgage Loan Schedule:  The list of the Mortgage Loans  transferred
to the  Trustee on the  Closing  Date as part of the Trust  Estate and  attached
hereto as Exhibits  F-1, F-2 and F-3,  which list may be amended  following  the
Closing Date upon  conveyance of a Substitute  Mortgage Loan pursuant to Section
2.02 or 2.03  and  which  list  shall  set  forth  at a  minimum  the  following
information  of the close of business on the Cut-Off  Date (or,  with respect to
Substitute  Mortgage  Loans,  as  of  the  close  of  business  on  the  day  of
substitution) as to each Mortgage Loan:

      (i)   the Mortgage Loan identifying number;

      (ii)  the city, state and zip code of the Mortgaged Property;

      (iii) the type of property;

      (iv)  the Mortgage Interest Rate;

      (v)   the Net Mortgage Interest Rate;

      (vi)  the Monthly Payment;

      (vii) the original number of months to maturity;

      (viii) the scheduled maturity date;

      (ix)  the Cut-Off Date Principal Balance;

      (x)   the Loan-to-Value Ratio at origination;

      (xi)  whether such Mortgage Loan is a Subsidy Loan;

      (xii) whether such Mortgage Loan is covered by primary mortgage insurance;

      (xiii) the Servicing Fee Rate;

      (xiv) the Master Servicing Fee;

      (xv)  Fixed Retained Yield, if applicable; and

      (xvi) for each Exhibit F-3 Mortgage  Loan,  the name of the Servicer  with
      respect thereto.

            Such schedule may consist of multiple reports that  collectively set
forth all of the information required.

            Mortgage Loans:  Each of the mortgage loans transferred and assigned
to the Trustee on the Closing  Date  pursuant to Section  2.01 and any  mortgage
loans  substituted  therefor  pursuant to Section 2.02 or 2.03,  in each case as
from time to time are included in the Trust Estate as identified in the Mortgage
Loan Schedule.

            Mortgage Note: The note or other evidence of indebtedness evidencing
the  indebtedness of a Mortgagor under a Mortgage Loan together with any related
Mortgage Loan Riders, if applicable.

            Mortgaged  Property:  The property subject to a Mortgage,  which may
include Co-op Shares or residential long-term leases.

            Mortgagor:  The obligor on a Mortgage Note.

            Net Foreclosure Profits: As to any Distribution Date, the amount, if
any,  by  which  (i)  Aggregate   Foreclosure   Profits  with  respect  to  such
Distribution  Date exceed  (ii)  Liquidated  Loan  Losses  with  respect to such
Distribution Date.

            Net  Liquidation  Proceeds:  As  to  any  defaulted  Mortgage  Loan,
Liquidation Proceeds net of Liquidation Expenses.

            Net Mortgage  Interest  Rate:  With respect to each Mortgage Loan, a
rate equal to (i) the Mortgage  Interest  Rate on such  Mortgage Loan minus (ii)
the sum of (a) the  Servicing  Fee Rate,  as set  forth in  Section  11.25  with
respect to such Mortgage Loan,  (b) the Master  Servicing Fee Rate, as set forth
in Section 11.26 with respect to such  Mortgage Loan and (c) the Fixed  Retained
Yield Rate,  if any,  with respect to such Mortgage  Loan.  Any regular  monthly
computation of interest at such rate shall be based upon annual interest at such
rate on the applicable amount divided by twelve.

            Net REO Proceeds:  As to any REO Mortgage  Loan, REO Proceeds net of
any related expenses of the Servicer.

            Non-permitted Foreign Holder:  As defined in Section 5.02(d).

            Non-PO  Fraction:  With respect to any Mortgage  Loan, the lesser of
(i) 1.00 and (ii) the quotient  obtained by dividing  the Net Mortgage  Interest
Rate for such Mortgage Loan by 6.500%.

            Nonrecoverable Advance: Any portion of a Periodic Advance previously
made or  proposed  to be made in respect  of a Mortgage  Loan which has not been
previously  reimbursed to the Servicer,  the Master Servicer or the Trustee,  as
the case may be, and which the  Servicer,  the Master  Servicer  or the  Trustee
determines will not, or in the case of a proposed Periodic Advance would not, be
ultimately  recoverable from Liquidation Proceeds or other recoveries in respect
of the related  Mortgage Loan.  The  determination  by the Servicer,  the Master
Servicer or the Trustee  (i) that it has made a  Nonrecoverable  Advance or (ii)
that any proposed Periodic  Advance,  if made, would constitute a Nonrecoverable
Advance,  shall  be  evidenced  by an  Officer's  Certificate  of  the  Servicer
delivered to the Master  Servicer for  redelivery to the Trustee or, in the case
of a Master  Servicer  determination,  an  Officer's  Certificate  of the Master
Servicer or  delivered to the Trustee,  in each case  detailing  the reasons for
such determination.

            Non-Supported  Interest Shortfall:  With respect to any Distribution
Date, the excess, if any, of the aggregate  Prepayment Interest Shortfall on the
Mortgage  Loans over the  aggregate  Compensating  Interest with respect to such
Distribution  Date. With respect to each Distribution Date occurring on or after
the Cross-Over Date, the Non-Supported Interest Shortfall determined pursuant to
the preceding  sentence will be increased by the amount of any  Cross-Over  Date
Interest  Shortfall  for such  Distribution  Date.  Any  Non-Supported  Interest
Shortfall  will be  allocated to (a) the Class A  Certificates  according to the
percentage  obtained by dividing the Class A Non-PO Principal Balance by the sum
of the Class A Non-PO  Principal  Balance and the Class B Principal  Balance and
(b) the Class B Certificates  according to the  percentage  obtained by dividing
the Class B Principal Balance by the sum of the Class A Non-PO Principal Balance
and the Class B Principal Balance.

            Non-U.S. Person:  As defined in Section 4.01(g).

            Norwest  Mortgage:  Norwest  Mortgage,  Inc.,  or its  successor  in
interest.

            Norwest Mortgage Correspondents: The entities listed on the Mortgage
Loan Schedule, from which Norwest Mortgage purchased the Mortgage Loans.

            Norwest Servicing  Agreement:  The Servicing Agreement providing for
the servicing of the Exhibit F-1 Mortgage  Loans and Exhibit F-2 Mortgage  Loans
initially by Norwest Mortgage.

            Officers'  Certificate:  With respect to any Person,  a  certificate
signed by the Chairman of the Board,  the President or a Vice President,  and by
the  Treasurer,  the Secretary or one of the  Assistant  Treasurers or Assistant
Secretaries  of  such  Person  (or,  in the  case  of a  Person  which  is not a
corporation, signed by the person or persons having like responsibilities),  and
delivered to the Trustee.

            Opinion of Counsel: A written opinion of counsel, who may be outside
or salaried counsel for the Seller,  a Servicer or the Master  Servicer,  or any
affiliate of the Seller,  a Servicer or the Master  Servicer,  acceptable to the
Trustee if such opinion is to be delivered  to the Trustee;  provided,  however,
that with respect to REMIC matters,  matters  relating to the  determination  of
Eligible Accounts or matters relating to transfers of Certificates, such counsel
shall be Independent.

            Optimal  Adjustment  Event:  With  respect  to any  Class of Class B
Certificates and any Distribution  Date, an Optimal  Adjustment Event will occur
with  respect to such Class if: (i) the  Principal  Balance of such Class on the
Determination  Date succeeding such Distribution Date would have been reduced to
zero  (regardless  of whether  such  Principal  Balance was reduced to zero as a
result of principal  distribution or the allocation of Realized Losses) and (ii)
(a) the Principal Balance of any Class of Class A Certificates  would be subject
to  further  reduction  as a  result  of the  third or  fifth  sentences  of the
definition of Principal Balance or (b) the Principal Balance of a Class of Class
B Certificates with a lower numerical  designation would be reduced with respect
to such  Distribution  Date as a result of the application of clause (ii) of the
definition of Class B-1 Principal Balance,  Class B-2 Principal  Balance,  Class
B-3 Principal Balance,  Class B-4 Principal Balance, Class B-5 Principal Balance
or Class B-6 Principal Balance.

            Original  Class  A  Percentage:  The  Class A  Percentage  as of the
Cut-Off Date, as set forth in Section 11.04.

            Original Class A Non-PO Principal  Balance:  The sum of the Original
Principal Balances of the Class A-1, Class A-2, Class A-3, Class A-4, Class A-5,
Class A-7, Class A-8, Class A-9, Class A-10, Class A-11, Class A-12, Class A-13,
Class  A-14,  Class A-R and Class  A-LR  Certificates,  as set forth in  Section
11.06.

            Original Class A-6 Notional Amount:  The Original Class A-6 Notional
Amount, as set forth in Section 11.05(a).

            Original  Class B Principal  Balance:  The sum of the Original Class
B-1 Principal Balance,  Original Class B-2 Principal Balance, Original Class B-3
Principal  Balance,  Original  Class B-4 Principal  Balance,  Original Class B-5
Principal  Balance and Original  Class B-6  Principal  Balance,  as set forth in
Section 11.14.

            Original Class B-1 Fractional Interest: As to the first Distribution
Date,  the  percentage  obtained by dividing the sum of the  Original  Class B-2
Principal Balance,  the Original Class B-3 Principal Balance, the Original Class
B-4 Principal  Balance,  Original  Class B-5 Principal  Balance and the Original
Class B-6 Principal  Balance by the sum of the Original Class A Non-PO Principal
Balance and the  Original  Class B Principal  Balance.  The  Original  Class B-1
Fractional Interest is specified in Section 11.16.

            Original Class B-2 Fractional Interest: As to the first Distribution
Date,  the  percentage  obtained by dividing the sum of the  Original  Class B-3
Principal Balance, the Original Class B-4 Principal Balance,  Original Class B-5
Principal Balance and the Original Class B-6 Principal Balance by the sum of the
Original  Class A Non-PO  Principal  Balance and the Original  Class B Principal
Balance.  The  Original  Class B-2  Fractional  Interest is specified in Section
11.17.

            Original Class B-3 Fractional Interest: As to the first Distribution
Date,  the  percentage  obtained by dividing the sum of the  Original  Class B-4
Principal  Balance,  the Original  Class B-5 Principal  Balance and the Original
Class B-6 Principal  Balance by the sum of the Original Class A Non-PO Principal
Balance and the  Original  Class B Principal  Balance.  The  Original  Class B-3
Fractional Interest is specified in Section 11.18.

            Original Class B-4 Fractional Interest: As to the first Distribution
Date,  the  percentage  obtained by dividing the sum of the  Original  Class B-5
Principal Balance and the Original Class B-6 Principal Balance by the sum of the
Original  Class A Non-PO  Principal  Balance and the Original  Class B Principal
Balance.  The  Original  Class B-4  Fractional  Interest is specified in Section
11.19.

            Original Class B-5 Fractional Interest: As to the first Distribution
Date,  the  percentage  obtained by dividing  the Original  Class B-6  Principal
Balance by the sum of the  Original  Class A Non-PO  Principal  Balance  and the
Original Class B Principal Balance.  The Original Class B-5 Fractional  Interest
is specified in Section 11.20.

            Original  Class B-1  Percentage:  The Class B-1 Percentage as of the
Cut-Off Date, as set forth in Section 11.08.

            Original  Class B-2  Percentage:  The Class B-2 Percentage as of the
Cut-Off Date, as set forth in Section 11.09.

            Original  Class B-3  Percentage:  The Class B-3 Percentage as of the
Cut-Off Date, as set forth in Section 11.10.

            Original  Class B-4  Percentage:  The Class B-4 Percentage as of the
Cut-Off Date, as set forth in Section 11.11.

            Original  Class B-5  Percentage:  The Class B-5 Percentage as of the
Cut-Off Date, as set forth in Section 11.12.

            Original  Class B-6  Percentage:  The Class B-6 Percentage as of the
Cut-Off Date, as set forth in Section 11.13.

            Original  Class B-1  Principal  Balance:  The  Class  B-1  Principal
Balance as of the Cut-Off Date, as set forth in Section 11.15.

            Original  Class B-2  Principal  Balance:  The  Class  B-2  Principal
Balance as of the Cut-Off Date, as set forth in Section 11.15.

            Original  Class B-3  Principal  Balance:  The  Class  B-3  Principal
Balance as of the Cut-Off Date, as set forth in Section 11.15.

            Original  Class B-4  Principal  Balance:  The  Class  B-4  Principal
Balance as of the Cut-Off Date, as set forth in Section 11.15.

            Original  Class B-5  Principal  Balance:  The  Class  B-5  Principal
Balance as of the Cut-Off Date, as set forth in Section 11.15.

            Original  Class B-6  Principal  Balance:  The  Class  B-6  Principal
Balance as of the Cut-Off Date, as set forth in Section 11.15.

            Original Principal  Balance:  Any of the Original Principal Balances
of the  Classes  of Class A  Certificates  as set forth in  Section  11.05;  the
Original  Class B-1 Principal  Balance,  Original  Class B-2 Principal  Balance,
Original  Class B-3 Principal  Balance,  Original  Class B-4 Principal  Balance,
Original Class B-5 Principal  Balance or Original Class B-6 Principal Balance as
set forth in Section 11.15.

            Original Subordinated Percentage:  The Subordinated Percentage as of
the Cut-Off Date, as set forth in Section 11.07.

            Other Servicer: Any of the Servicers other than Norwest Mortgage.

            Other Servicing Agreements:  The Servicing Agreements other than the
Norwest Servicing Agreement.

            Outstanding  Mortgage  Loan:  As to any Due Date,  a  Mortgage  Loan
(including an REO Mortgage Loan) which was not the subject of a Full Unscheduled
Principal  Receipt prior to such Due Date and which was not  repurchased  by the
Seller prior to such Due Date pursuant to Section 2.02 or 2.03.

            Owner  Mortgage Loan File: A file  maintained by the Trustee (or the
Custodian,  if any) for each Mortgage Loan that contains the documents specified
in the  Servicing  Agreements  or, in the case of each Mortgage Loan serviced by
Bank  United,  the  documents  specified in the Bank United  Mortgage  Loan Sale
Agreement  under their  respective  "Owner  Mortgage  Loan File"  definition  or
similar  definition  and/or  other  provisions  requiring  delivery of specified
documents  to the owner of the  Mortgage  Loan in  connection  with the purchase
thereof, and any additional documents required to be added to the Owner Mortgage
Loan File pursuant to this Agreement.

            PAC  Certificates:  The Class A-1,  Class A-2, Class A-3, Class A-4,
Class A-5 and Class A-11 Certificates.

            PAC Principal Amount:  As defined in Section 4.01(b).

            Partial  Liquidation  Proceeds:  Liquidation  Proceeds received by a
Servicer  prior  to the  month in  which  the  related  Mortgage  Loan  became a
Liquidated Loan.

            Partial  Unscheduled  Principal  Receipt:  An Unscheduled  Principal
Receipt which is not a Full Unscheduled Principal Receipt.

            Paying Agent:  The Person  authorized  on behalf of the Trustee,  as
agent for the Master Servicer, to make distributions to Certificateholders  with
respect to the  Certificates and to forward to  Certificateholders  the periodic
and annual  statements  required by Section  4.04.  The Paying  Agent may be any
Person  directly or  indirectly  controlling  or  controlled  by or under common
control  with the Master  Servicer and may be the  Trustee.  The initial  Paying
Agent is appointed in Section 4.03(a).

            Payment Account: The account maintained pursuant to Section 4.03(b).

            Percentage  Interest:  With respect to a Class A Certificate  (other
than Class A-6  Certificates),  the undivided  percentage  interest  obtained by
dividing  the original  principal  balance of such  Certificate  by the Original
Principal Balance of such Class of Class A Certificates. With respect to a Class
A-6  Certificate,  the undivided  percentage  interest  obtained by dividing the
original notional amount evidenced by such Certificate by the Original Class A-6
Notional Amount of such Class. With respect to a Class B Certificate of a Class,
the undivided  percentage  interest obtained by dividing the original  principal
balance of such Certificate by the Original  Principal  Balance of such Class of
Class B Certificates.

            Periodic Advance:  The aggregate of the advances required to be made
by a Servicer on any Distribution Date pursuant to its Servicing Agreement or by
the Master  Servicer or the Trustee  hereunder,  the amount of any such advances
being equal to the total of all Monthly Payments (adjusted,  in each case (i) in
respect  of  interest,  to  the  applicable  Mortgage  Interest  Rate  less  the
applicable Servicing Fee in the case of Periodic Advances made by a Servicer and
to the  applicable Net Mortgage  Interest Rate in the case of Periodic  Advances
made by the Master  Servicer  or Trustee  and (ii) by the amount of any  related
Debt Service Reductions or reductions in the amount of interest collectable from
the Mortgagor  pursuant to the Soldiers' and Sailors'  Civil Relief Act of 1940,
as  amended,  or  similar  legislation  or  regulations  then in  effect) on the
Mortgage  Loans,  that (x) were  delinquent  as of the close of  business on the
related  Determination  Date,  (y) were not the  subject of a previous  Periodic
Advance by such Servicer or of a Periodic  Advance by the Master Servicer or the
Trustee,  as the case may be and (z) have  not  been  determined  by the  Master
Servicer, such Servicer or Trustee to be Nonrecoverable Advances.

            Person:  Any individual,  corporation,  partnership,  joint venture,
association,   joint-stock  company,  trust,   unincorporated   organization  or
government or any agency or political subdivision thereof.

            Plan:  As defined in Section 5.02(c).

            PO  Fraction:  With  respect  to any  Discount  Mortgage  Loan,  the
difference  between 1.0 and the Non-PO  Fraction for such  Mortgage  Loan;  with
respect to any other Mortgage Loan, zero.

            Pool Balance (Non-PO Portion):  As of any Distribution Date, the sum
of the amounts for each  Mortgage Loan that is an  Outstanding  Mortgage Loan of
the  product  of (i) the Non-PO  Fraction  for such  Mortgage  Loan and (ii) the
Scheduled Principal Balance of such Mortgage Loan.

            Pool Balance (PO Portion):  As of any Distribution  Date, the sum of
the amounts for each Mortgage Loan that is an  Outstanding  Mortgage Loan of the
product of (i) the PO Fraction  for such  Mortgage  Loan and (ii) the  Scheduled
Principal Balance of such Mortgage Loan.

            Pool  Distribution  Amount:  As of any Distribution  Date, the funds
eligible  for   distribution  to  the  Holders  of  the   Certificates  on  such
Distribution  Date,  which shall be the sum of (i) all previously  undistributed
payments or other receipts on account of principal and interest on or in respect
of the  Mortgage  Loans  (including,  without  limitation,  the  proceeds of any
repurchase  of a  Mortgage  Loan by the Seller  and any  Substitution  Principal
Amount)  received  by  the  Master  Servicer  with  respect  to  the  applicable
Remittance  Date in the  month of such  Distribution  Date  and any  Unscheduled
Principal  Receipts  received by the Master Servicer on or prior to the Business
Day  preceding  such  Distribution  Date,  (ii) all Periodic  Advances made by a
Servicer pursuant to the related  Servicing  Agreement or Periodic Advances made
by the Master  Servicer  or the Trustee  pursuant to Section  3.03 and (iii) all
other amounts  required to be placed in the Certificate  Account by the Servicer
on or before the  applicable  Remittance  Date or by the Master  Servicer or the
Trustee on or prior to the Distribution  Date, but excluding the following:  (a)
amounts  received as late payments of principal or interest and respecting which
the Master  Servicer or the Trustee has made one or more  unreimbursed  Periodic
Advances;  (b)  the  portion  of  Liquidation  Proceeds  used to  reimburse  any
unreimbursed  Periodic Advances by the Master Servicer or the Trustee; (c) those
portions  of each  payment  of  interest  on a  particular  Mortgage  Loan which
represent (i) the Fixed Retained Yield, if any, (ii) the Servicing Fee and (iii)
the Master  Servicing Fee; (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 Unscheduled  Principal Receipts received
by the Servicers  after the  Applicable  Unscheduled  Principal  Receipt  Period
relating  to the  Distribution  Date  for the  applicable  type  of  Unscheduled
Principal Receipt, and all related payments of interest on such amounts; (f) all
repurchase  proceeds with respect to Mortgage  Loans  repurchased  by the Seller
pursuant to Section  2.02 or 2.03 on or  following  the Due Date in the month in
which such  Distribution  Date  occurs  and the  difference  between  the unpaid
principal  balance of such 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;  (g) that
portion of  Liquidation  Proceeds and REO Proceeds  which  represents any unpaid
Servicing Fee or Master Servicing Fee; (h) all income from Eligible  Investments
that is held in the Certificate  Account for the account of the Master Servicer;
(i) all other amounts permitted to be withdrawn from the Certificate  Account in
respect of the Mortgage  Loans, to the extent not covered by clauses (a) through
(h) above, or not required to be deposited in the Certificate Account under this
Agreement;  (j) Net  Foreclosure  Profits;  (k) Month End Interest;  and (l) the
amount of any  Recoveries  in respect of  principal  which had  previously  been
allocated  as a  loss  to  one  or  more  Classes  of the  Class  A or  Class  B
Certificates  pursuant to Section 4.02 other than Recoveries covered by the last
sentence of Section 4.02(d).

            Pool Scheduled  Principal Balance:  As to any Distribution Date, the
aggregate   Scheduled  Principal  Balances  of  all  Mortgage  Loans  that  were
Outstanding  Mortgage Loans on the Due Date in the month  preceding the month of
such Distribution Date.

            Prepayment In Full:  With respect to any Mortgage  Loan, a Mortgagor
payment  consisting of a Principal  Prepayment in the amount of the  outstanding
principal  balance of such loan and resulting in the full  satisfaction  of such
obligation.

            Prepayment Interest Shortfall:  On any Distribution Date, the amount
of interest,  if any, that would have accrued on any Mortgage Loan which was the
subject  of a  Prepayment  in Full at the Net  Mortgage  Interest  Rate for such
Mortgage  Loan  from the date of its  Prepayment  in Full  (but in the case of a
Prepayment in Full where the Applicable  Unscheduled Principal Receipt Period is
the Mid-Month  Receipt Period,  only if the date of the Prepayment in Full is on
or  after  the  Determination  Date in the  month  prior  to the  month  of such
Distribution  Date and prior to the first day of the month of such  Distribution
Date) through the last day of the month prior to the month of such  Distribution
Date.

            Principal  Accretion  Amount:  With  respect to any Class of Accrual
Certificates and as to any Distribution  Date prior to the applicable  Accretion
Termination  Date,  an amount with respect to such Class equal to the sum of the
amounts calculated pursuant to clauses (i) and (ii) of the definition of Accrual
Distribution Amount with respect to such Distribution Date.

            Principal  Adjustment:  In the  event  that the  Class  B-1  Optimal
Principal  Amount,  Class  B-2  Optimal  Principal  Amount,  Class  B-3  Optimal
Principal  Amount,  Class  B-4  Optimal  Principal  Amount,  Class  B-5  Optimal
Principal  Amount  or Class  B-6  Optimal  Principal  Amount  is  calculated  in
accordance with the proviso in such definition with respect to any  Distribution
Date,  the Principal  Adjustment  for such Class of Class B  Certificates  shall
equal the difference  between (i) the amount that would have been distributed to
such  Class  as  principal  in  accordance  with  Section  4.01(a)(i)  for  such
Distribution Date,  calculated without regard to such proviso and assuming there
are no Principal  Adjustments for such  Distribution  Date and (ii) the Adjusted
Principal Balance for such Class.

            Principal Balance:  As of the first Determination Date and as to any
Class of Class A  Certificates  (other  than the  Class A-6  Certificates),  the
Original  Principal  Balance of such Class.  As of any subsequent  Determination
Date prior to the  Cross-Over  Date and as to any Class of Class A  Certificates
(other than the Class A-6 and Class A-PO  Certificates),  the Original Principal
Balance of such Class (increased in the case of a Class of Accrual  Certificates
by the Principal  Accretion Amounts with respect to prior Distribution Dates for
such Class of Accrual  Certificates)  less the sum of (a) all amounts previously
distributed in respect of such Class on prior Distribution Dates (i) pursuant to
Paragraph third clause (A) of Section  4.01(a),  (ii) as a result of a Principal
Adjustment and (iii), if applicable,  from the Accrual  Distribution Amounts for
such prior Distribution Dates and (b) the Realized Losses allocated through such
Determination  Date to  such  Class  pursuant  to  Section  4.02(b).  After  the
Cross-Over  Date,  each such  Principal  Balance  will also be  reduced (a "Loss
Reduction") on each  Determination Date by an amount equal to the product of the
Class A Loss Percentage of such Class and the excess, if any, of (i) the Class A
Non-PO Principal  Balance as of such  Determination  Date without regard to this
sentence over (ii) the  difference  between (A) the Adjusted Pool Amount for the
preceding  Distribution  Date and (B) the Adjusted  Pool Amount (PO Portion) for
the preceding Distribution Date; provided,  however, that the amount of any such
Loss  Reduction for the Class A-13  Certificates  will be decreased by the Class
A-14 Loss Allocation  Amount.  After the Cross-Over Date, the Principal  Balance
for the Class A-14  Certificates  will additionally be reduced by the Class A-14
Loss Allocation Amount.

            The Class A-6 Certificates are  interest-only  Certificates and have
no Principal Balance.

            As of any subsequent Determination Date prior to the Cross-Over Date
and as to the Class A-PO  Certificates,  the Original  Principal Balance of such
Class less the sum of (a) all amounts  previously  distributed in respect of the
Class A-PO Certificates on prior Distribution Dates pursuant to Paragraphs third
clause  (B) and  fourth  of  Section  4.01(a)(i)  and (b)  the  Realized  Losses
allocated  through  such  Determination  Date  to the  Class  A-PO  Certificates
pursuant to Section 4.02(b).  After the Cross-Over Date, such Principal  Balance
will  also be  reduced  on each  Determination  Date by an  amount  equal to the
difference, if any, between such Principal Balance as of such Determination Date
without  regard to this  sentence and the Adjusted  Pool Amount (PO Portion) for
the preceding Distribution Date.

            As to the Class B  Certificates,  the Class B-1  Principal  Balance,
Class B-2 Principal Balance,  Class B-3 Principal  Balance,  Class B-4 Principal
Balance,   Class  B-5  Principal  Balance  and  Class  B-6  Principal   Balance,
respectively.

            Principal Prepayment: Any Mortgagor payment on a Mortgage Loan which
is  received  in  advance  of its Due Date and is not  accompanied  by an amount
representing  scheduled  interest  for  any  period  subsequent  to the  date of
prepayment.

            Prior Month Receipt Period:  With respect to each Distribution Date,
the calendar month preceding the month in which such Distribution Date occurs.

            Prohibited  Transaction  Tax: Any tax imposed  under Section 860F of
the Code.

            Prudent Servicing Practices:  The standard of care set forth in each
Servicing Agreement.

            Rate  Determination  Date: As to any Distribution Date and any Class
of LIBOR  Certificates,  the second LIBOR Business Day preceding the 25th day of
the month preceding the month in which such Distribution Date occurs.

            Rating Agency: Any nationally  recognized  statistical credit rating
agency, or its successor,  that rated one or more Classes of the Certificates at
the  request  of  the  Seller  at  the  time  of  the  initial  issuance  of the
Certificates.  The  Rating  Agencies  for the Class A  Certificates  are DCR and
Moody's.  The Rating Agency for the Class B-1,  Class B-2,  Class B-3, Class B-4
and Class B-5  Certificates  is DCR.  If any such  agency or a  successor  is no
longer in existence,  "Rating  Agency" shall be such  statistical  credit rating
agency, or other comparable  Person,  designated by the Seller,  notice of which
designation  shall be given to the Trustee and the Master  Servicer.  References
herein to the highest  short-term  rating category of a Rating Agency shall mean
D-1+ in the  case of DCR,  P-1+ in the  case of  Moody's  and in the case of any
other Rating Agency shall mean its equivalent of such ratings. References herein
to the highest  long-term  rating  categories of a Rating Agency shall mean AAA,
and in the case of any other  Rating  Agency shall mean its  equivalent  of such
rating without any plus or minus.

            Realized  Losses:   With  respect  to  any  Distribution  Date,  (i)
Liquidated  Loan Losses  (including  Special Hazard Losses and Fraud Losses) and
(ii)  Bankruptcy  Losses  incurred  in the  month  preceding  the  month of such
Distribution Date.

            Record Date: The last Business Day of the month  preceding the month
of the related Distribution Date.

            Recovery:  Any amount received on a Mortgage Loan subsequent to such
Mortgage Loan being determined to be a Liquidated Loan.

            Reduction Amount:  As defined in Section 4.01(b).

            Reference  Banks:  Initially,  the Reference Banks shall be Deutsche
Bank  International,  Bank of America,  FSB, Citibank,  N.A., and The Fuji Bank,
Limited. If any of these banks are not available,  the Trustee shall select from
one of the following  banks a substitute  Reference  Bank:  Marine Midland Bank,
Westdeutsche  Landesbank  Girozentrale,  The Chase  Manhattan  Bank or  National
Westminster Bank Plc. If any of these banks are not available, the Trustee shall
in its discretion select another Reference Bank.

            Relevant Anniversary: See "Bankruptcy Loss Amount."

            REMIC:  A "real estate  mortgage  investment  conduit" as defined in
Code Section 860D.

            REMIC Provisions:  Provisions of the federal income tax law relating
to REMICs, which appear at Sections 860A through 860G of Part IV of Subchapter M
of  Chapter  1 of  Subtitle  A of the Code,  and  related  provisions,  and U.S.
Department of the Treasury temporary,  proposed or final regulations promulgated
thereunder,  as the  foregoing  are in  effect  (or  with  respect  to  proposed
regulations, are proposed to be in effect) from time to time.

            Remittance Date:  As defined in each of the Servicing Agreements.

            REO Mortgage Loan: Any Mortgage Loan which is not a Liquidated  Loan
and as to which the  indebtedness  evidenced  by the  related  Mortgage  Note is
discharged  and the  related  Mortgaged  Property  is held as part of the  Trust
Estate.

            REO Proceeds:  Proceeds received in respect of any REO Mortgage Loan
(including,  without  limitation,  proceeds  from  the  rental  of  the  related
Mortgaged Property).

            Request for Release: A request for release in substantially the form
attached as Exhibit G hereto.

            Responsible  Officer:  When used with  respect to the  Trustee,  the
Chairman or Vice-Chairman of the Board of Directors or Trustees, the Chairman or
Vice-Chairman  of the Executive or Standing  Committee of the Board of Directors
or Trustees, the President,  the Chairman of the Committee on Trust Matters, any
Vice  President,  the Secretary,  any Assistant  Secretary,  the Treasurer,  any
Assistant  Treasurer,  the Cashier,  any Assistant Cashier, any Trust Officer or
Assistant  Trust Officer,  the  Controller  and any Assistant  Controller or any
other officer of the Trustee customarily  performing  functions similar to those
performed by any of the  above-designated  officers and also,  with respect to a
particular  matter, any other officer to whom such matter is referred because of
such officer's knowledge of and familiarity with the particular subject.

            Rule 144A: Rule 144A  promulgated  under the Securities Act of 1933,
as amended.

            Scheduled  Certificates:  The Class A-7,  Class  A-8,  Class A-9 and
Class A-10 Certificates.

            Scheduled   Principal   Balance:   As  to  any  Mortgage   Loan  and
Distribution  Date,  the  principal  balance of such Mortgage Loan as of the Due
Date in the month preceding the month of such  Distribution Date as specified in
the amortization schedule at the time relating thereto (before any adjustment to
such  amortization  schedule by reason of any  bankruptcy  (other than Deficient
Valuations)  or similar  proceeding or any moratorium or similar waiver or grace
period) after giving effect to (A) Unscheduled  Principal  Receipts  received or
applied by the  applicable  Servicer  during the related  Unscheduled  Principal
Receipt Period for each applicable type of Unscheduled Principal Receipt related
to the  Distribution  Date occurring in the month  preceding  such  Distribution
Date,  (B)  Deficient  Valuations  incurred  prior  to such Due Date and (C) the
payment of principal due on such Due Date and irrespective of any delinquency in
payment by the related Mortgagor.  Accordingly,  the Scheduled Principal Balance
of a Mortgage Loan which becomes a Liquidated  Loan at any time through the last
day of such related Unscheduled Principal Receipt Period shall be zero.

            Seller:  Norwest Asset Securities  Corporation,  or its successor in
interest.

            Senior Optimal Amount: As to any Distribution Date, the sum for such
Distribution  Date of (a) the Class A Non-PO  Optimal  Amount  and (b) the Class
A-PO Optimal Principal Amount.

            Servicer  Mortgage  Loan File:  As defined in each of the  Servicing
Agreements.

            Servicers:  Each of Norwest Mortgage,  SunTrust Mortgage, Inc., Bank
United,  BankNorth  Mortgage  Company,  National  City  Mortgage  Company,  GMAC
Mortgage  Corporation,  Countrywide Home Loans, Inc., America First Credit Union
and Charter  Bank for  Savings,  FSB as a Servicer  under the related  Servicing
Agreement.

            Servicing Agreements: Each of the Servicing Agreements executed with
respect  to a  portion  of the  Mortgage  Loans by one of the  Servicers,  which
agreements are attached hereto, collectively, as Exhibit L.

            Servicing  Fee:  With  respect  to any  Servicer,  as defined in its
Servicing Agreement.

            Servicing Fee Rate: With respect to a Mortgage Loan, as set forth in
Section 11.25.

            Servicing  Officer:  Any  officer  of a  Servicer  involved  in,  or
responsible for, the administration and servicing of the Mortgage Loans.

            Similar Law:  As defined in Section 5.02(c).

            Single  Certificate:  A Certificate  of any Class that evidences the
smallest permissible Denomination for such Class, as set forth in Section 11.24.

            Special  Hazard  Loss:  (i) A  Liquidated  Loan Loss  suffered  by a
Mortgaged Property on account of direct physical loss, exclusive of (a) any loss
covered by a hazard policy or a flood insurance policy  maintained in respect of
such  Mortgaged  Property  pursuant  to a Servicing  Agreement  and (b) any loss
caused by or resulting from:

            (1)   normal wear and tear;

            (2)   infidelity,  conversion or other  dishonest act on the part of
                  the  Trustee,  or  the  Servicer  or any of  their  agents  or
                  employees; or

            (3)   errors in  design,  faulty  workmanship  or faulty  materials,
                  unless the collapse of the property or a part thereof ensues;

or (ii) any  Liquidated  Loan Loss suffered by the Trust Estate  arising from or
related to the presence or suspected  presence of hazardous  wastes or hazardous
substances on a Mortgaged  Property unless such loss to a Mortgaged  Property is
covered by a hazard policy or a flood insurance policy  maintained in respect of
such Mortgaged Property pursuant to the Servicing Agreement.

            Special Hazard Loss Amount:  As of any Distribution  Date, an amount
equal to  $4,728,124.94  minus the sum of (i) the  aggregate  amount of  Special
Hazard Losses  allocated  solely to the Class B Certificates  in accordance with
Section 4.02(a) and (ii) the Special Hazard Adjustment Amount (as defined below)
as most recently  calculated.  For each  anniversary  of the Cut-Off  Date,  the
Special Hazard  Adjustment  Amount shall be calculated and shall be equal to the
amount,  if any, by which the amount calculated in accordance with the preceding
sentence  (without  giving  effect  to  the  deduction  of  the  Special  Hazard
Adjustment Amount for such  anniversary)  exceeds the greater of (A) the product
of  the  Special  Hazard  Percentage  for  such  anniversary  multiplied  by the
outstanding principal balance of all the Mortgage Loans on the Distribution Date
immediately  preceding such  anniversary,  (B) twice the  outstanding  principal
balance  of the  Mortgage  Loan  in the  Trust  Estate  which  has  the  largest
outstanding  principal  balance on the Distribution  Date immediately  preceding
such  anniversary  and (C) that which is  necessary  to  maintain  the  original
ratings on the  Certificates as evidenced by letters to that effect delivered by
Rating  Agencies  to the  Master  Servicer  and the  Trustee.  On and  after the
Cross-Over Date, the Special Hazard Loss Amount shall be zero.

            Special  Hazard  Percentage:  As of each  anniversary of the Cut-Off
Date,  the  greater of (i) 1.00% and (ii) the  largest  percentage  obtained  by
dividing the  aggregate  outstanding  principal  balance (as of the  immediately
preceding  Distribution  Date)  of  the  Mortgage  Loans  secured  by  Mortgaged
Properties  located  in a  single,  five-digit  zip  code  area in the  State of
California by the outstanding  principal balance of all the Mortgage Loans as of
the immediately preceding Distribution Date.

            Startup Day:  As defined in Section 2.05.

            Subordinated Percentage: As to any Distribution Date, the percentage
which is the difference between 100% and the Class A Percentage for such date.

            Subordinated Prepayment Percentage: As to any Distribution Date, the
percentage  which is the  difference  between  100% and the  Class A  Prepayment
Percentage for such date.

            Subsidy  Loan:  Any Mortgage  Loan  subject to a temporary  interest
subsidy  agreement  pursuant to which the monthly interest  payments made by the
related  Mortgagor will be less than the scheduled  monthly interest payments on
such Mortgage  Loan,  with the resulting  difference in interest  payments being
provided by the employer of the Mortgagor.  Each Subsidy Loan will be identified
as such in the Mortgage Loan Schedule.

            Substitute Mortgage Loan:  As defined in Section 2.02.

            Substitution  Principal  Amount:  With respect to any Mortgage  Loan
substituted  in accordance  with Section 2.02 or pursuant to Section  2.03,  the
excess  of (x) the  unpaid  principal  balance  of the  Mortgage  Loan  which is
substituted for over (y) the unpaid principal balance of the Substitute Mortgage
Loan, each balance being determined as of the date of substitution.

            Trustee:  First Union National Bank, a national banking  association
with its principal office located in Charlotte, North Carolina, or any successor
Trustee appointed as herein provided.

            Trust  Estate:  The corpus of the trust  created by this  Agreement,
consisting of the Mortgage  Loans (other than any Fixed  Retained  Yield),  such
amounts as may be held from time to time in the Certificate  Account (other than
any Fixed Retained Yield), the rights of the Trustee, to receive the proceeds of
all insurance  policies and performance bonds, if any, required to be maintained
hereunder or under the related Servicing  Agreement and property which secured a
Mortgage  Loan and which has been  acquired  by  foreclosure  or deed in lieu of
foreclosure.

            Uncertificated  Lower-Tier Interest: Any of the Class A-L1 Interest,
the Class A-L5 Interest,  the Class A-L7 Interest,  the Class A-L8 Interest, the
Class A-L12 Interest,  the Class A-L14 Interest,  the Class A-LPO Interest,  the
Class A-LUR  Interest,  the Class B-LI Interest,  the Class B-L2  Interest,  the
Class B-L3 Interest,  the Class B-L4  Interest,  the Class B-L5 Interest and the
Class B-L6 Interest.

            Unpaid  Interest  Shortfalls:  Each of the  Class A Unpaid  Interest
Shortfalls,  the Class  B-1  Unpaid  Interest  Shortfall,  the Class B-2  Unpaid
Interest  Shortfall,  the Class B-3  Unpaid  Interest  Shortfall,  the Class B-4
Unpaid Interest Shortfall, the Class B-5 Unpaid Interest Shortfall and the Class
B-6 Unpaid Interest Shortfall.

            Unscheduled  Principal  Receipt:  Any Principal  Prepayment or other
recovery  of  principal  on a  Mortgage  Loan,  including,  without  limitation,
Liquidation   Proceeds,   Net  REO  Proceeds  and  proceeds  received  from  any
condemnation  award or proceeds in lieu of condemnation  other than that portion
of such proceeds  released to the Mortgagor in accordance  with the terms of the
Mortgage or Prudent  Servicing  Practices,  but  excluding  any Net  Foreclosure
Profits and  proceeds of a repurchase  of a Mortgage  Loan by the Seller and any
Substitution  Principal  Amounts.  Except as set forth in the last  sentence  of
Section  4.02(d),  a Recovery shall not be treated as an  Unscheduled  Principal
Receipt.

            Unscheduled  Principal  Receipt Period:  Either a Mid-Month  Receipt
Period or a Prior Month Receipt Period.

            Upper-Tier  Certificate:  Any one of the Class A Certificates (other
than the Class A-LR Certificate) and the Class B Certificates.

            Upper-Tier  Certificate  Account:  The trust account established and
maintained pursuant to Section 4.01(e).

            Upper-Tier  REMIC:  One of the two separate  REMICs  comprising  the
Trust  Estate,  the  assets of which  consist of the  Uncertificated  Lower-Tier
Interests and such amounts as shall from time to time be held in the  Upper-Tier
Certificate Account.

            U.S. Person:  As defined in Section 4.01(g).

            Voting Interest: With respect to any provisions hereof providing for
the action,  consent or approval of the Holders of all  Certificates  evidencing
specified Voting Interests in the Trust Estate,  the Class A-6 Certificates will
be  entitled  to  1%  of  the  aggregate  Voting  Interest  represented  by  all
Certificates and each remaining Class of Certificates  will be entitled to a pro
rata portion of the remaining  Voting  Interest  equal to the ratio  obtained by
dividing the  Principal  Balance Each  Certificateholder  of a Class will have a
Voting  Interest equal to the product of the Voting Interest to which such Class
is collectively  entitled and the Percentage  Interest in such Class represented
by such Holder's  Certificates.  With respect to any provisions hereof providing
for  action,  consent or  approval of each Class of  Certificates  or  specified
Classes of Certificates,  each  Certificateholder  of a Class will have a Voting
Interest in such Class equal to such Holder's Percentage Interest in such Class.

            Weighted Average Net Mortgage  Interest Rate: As to any Distribution
Date,  a rate per annum equal to the average,  expressed as a percentage  of the
Net Mortgage Interest Rates of all Mortgage Loans that were Outstanding Mortgage
Loans as of the Due Date in the month  preceding the month of such  Distribution
Date,  weighted on the basis of the respective  Scheduled  Principal Balances of
such Mortgage Loans. SECTION 1.02......ACTS OF HOLDERS. (a) Any request, demand,
authorization,  direction,  notice,  consent, waiver or other action provided by
this  Agreement to be given or taken by Holders may be embodied in and evidenced
by one or more instruments of substantially similar tenor signed by such Holders
in person or by an agent duly appointed in writing.  Except as herein  otherwise
expressly  provided,  such action shall become effective when such instrument or
instruments  are  delivered  to the  Trustee.  Proof  of  execution  of any such
instrument or of a writing appointing any such agent shall be sufficient for any
purpose of this Agreement and conclusive in favor of the Trustee, if made in the
manner  provided in this Section  1.02.  The Trustee shall  promptly  notify the
Master Servicer in writing of the receipt of any such instrument or writing. (b)
The fact and date of the  execution  by any  Person  of any such  instrument  or
writing may be proved by the  affidavit  of a witness of such  execution or by a
certificate  of a notary  public  or  other  officer  authorized  by law to take
acknowledgments of deeds, certifying that the individual signing such instrument
or writing acknowledged to him the execution thereof.  When such execution is by
a signer acting in a capacity  other than his or her individual  capacity,  such
certificate or affidavit  shall also constitute  sufficient  proof of his or her
authority. The fact and date of the execution of any such instrument or writing,
or the authority of the individual executing the same, may also be proved in any
other  manner  which  the  Trustee  deems  sufficient.   (c)  The  ownership  of
Certificates   (whether   or  not  such   Certificates   shall  be  overdue  and
notwithstanding  any  notation of  ownership  or other  writing  thereon made by
anyone other than the Trustee and the  Authenticating  Agent) shall be proved by
the  Certificate  Register,  and neither the Trustee,  the Seller nor the Master
Servicer  shall be  affected  by any notice to the  contrary.  (d) Any  request,
demand, authorization, direction, notice, consent, waiver or other action of the
Holder of any Certificate shall bind every future Holder of the same Certificate
and the Holder of every  Certificate  issued upon the  registration  of transfer
thereof or in exchange  therefor or in lieu thereof in respect of anything done,
omitted or suffered to be done by the Trustee, the Seller or the Master Servicer
in reliance  thereon,  whether or not  notation of such action is made upon such
Certificate. SECTION 1.03......EFFECT OF HEADINGS AND TABLE OF CONTENTS.

            The Article and Section  headings in this Agreement and the Table of
Contents  are for  convenience  of  reference  only and  shall  not  affect  the
interpretation or construction of this Agreement.  SECTION 1.04......BENEFITS OF
AGREEMENT.

            Nothing  in  this  Agreement  or in  the  Certificates,  express  or
implied,  shall give to any Person, other than the parties to this Agreement and
their  successors  hereunder and the Holders of the  Certificates any benefit or
any legal or equitable right, power, remedy or claim under this Agreement.


<PAGE>

                                   ARTICLE II

                          CONVEYANCE OF MORTGAGE LOANS;
                      ORIGINAL ISSUANCE OF THE CERTIFICATES

            SECTION 2.01 CONVEYANCE OF MORTGAGE LOANS.

            The Seller,  concurrently  with the execution  and delivery  hereof,
does hereby  assign to the Trustee,  without  recourse all the right,  title and
interest of the Seller in and to (a) the Trust  Estate,  including  all interest
(other than the portion,  if any,  representing  the Fixed  Retained  Yield) and
principal  received by the Seller on or with respect to the Mortgage Loans after
the Cut-Off Date (and including scheduled payments of principal and interest due
after the Cut-Off  Date but received by the Seller on or before the Cut-Off Date
and Unscheduled  Principal Receipts received or applied on the Cut-Off Date, but
not including payments of principal and interest due on the Mortgage Loans on or
before the Cut-Off Date), (b) the Insurance Policies, (c) the obligations of the
Servicers under the Servicing  Agreements with respect to the Mortgage Loans and
(d) proceeds of all the foregoing.

            In connection with such assignment,  the Seller shall,  with respect
to each Mortgage Loan,  deliver,  or cause to be delivered,  to the Trustee,  as
initial  Custodian,  on or before the Closing Date, an Owner Mortgage Loan File.
If any  Mortgage  or an  assignment  of a Mortgage  to the  Trustee or any prior
assignment is in the process of being  recorded on the Closing Date,  the Seller
shall deliver a copy thereof,  certified by Norwest  Mortgage or the  applicable
Norwest  Mortgage  Correspondent  to be a true and complete copy of the document
sent for recording, and the Seller shall use its best efforts to cause each such
original  recorded  document or  certified  copy  thereof to be delivered to the
Trustee promptly  following its recordation,  but in no event later than one (1)
year  following the Closing Date. The Seller shall also cause to be delivered to
the  Trustee any other  original  mortgage  loan  document to be included in the
Owner Mortgage Loan File if a copy thereof has been delivered.  The Seller shall
pay from its own funds, without any right of reimbursement  therefor, the amount
of any costs, liabilities and expenses incurred by the Trust Estate by reason of
the failure of the Seller to cause to be delivered to the Trustee within one (1)
year  following  the  Closing  Date any  original  Mortgage or  assignment  of a
Mortgage not delivered to the Trustee on the Closing Date.

            In lieu of recording an  assignment  of any Mortgage the Seller may,
to the extent set forth in the applicable Servicing Agreement,  deliver or cause
to be delivered  to the Trustee the  assignment  of the  Mortgage  Loan from the
Seller to the  Trustee in a form  suitable  for  recordation,  together  with an
Opinion of Counsel to the effect that  recording  is not required to protect the
Trustee's  right,  title and interest in and to the related Mortgage Loan or, in
case a  court  should  recharacterize  the  sale  of  the  Mortgage  Loans  as a
financing, to perfect a first priority security interest in favor of the Trustee
in the related  Mortgage  Loan. In the event that the Master  Servicer  receives
notice that  recording  is required to protect the right,  title and interest of
the  Trustee  in and to any such  Mortgage  Loan  for  which  recordation  of an
assignment has not previously been required,  the Master Servicer shall promptly
notify the Trustee  and the Trustee  shall  within five  Business  Days (or such
other reasonable  period of time mutually agreed upon by the Master Servicer and
the Trustee) of its receipt of such notice  deliver each  previously  unrecorded
assignment to the related Servicer for recordation.

            SECTION 2.02 ACCEPTANCE BY TRUSTEE.

            The  Trustee,  acknowledges  receipt  of  the  Mortgage  Notes,  the
Mortgages,  the assignments and other documents  required to be delivered on the
Closing Date  pursuant to Section 2.01 above and declares that it holds and will
hold such  documents and the other  documents  constituting  a part of the Owner
Mortgage Loan Files delivered to it in trust,  upon the trusts herein set forth,
for the use and  benefit  of all  present  and  future  Certificateholders.  The
Trustee  agrees,  for the  benefit of  Certificateholders,  to review each Owner
Mortgage Loan File within 45 days after  execution of this Agreement in order to
ascertain  that all  required  documents  set  forth in  Section  2.01 have been
executed and received and appear  regular on their face, and that such documents
relate to the Mortgage Loans identified in the Mortgage Loan Schedule, and in so
doing the Trustee may rely on the purported due execution and genuineness of any
such document and on the purported  genuineness  of any  signature  thereon.  If
within such 45 day period the Trustee finds any document  constituting a part of
an Owner  Mortgage  Loan File not to have been  executed  or  received  or to be
unrelated to the Mortgage Loans  identified in the Mortgage Loan Schedule or not
to appear  regular on its face, the Trustee shall promptly (and in no event more
than 30 days after the discovery of such defect) notify the Seller,  which shall
have a period of 60 days after the date of such notice  within  which to correct
or cure any such defect.  The Seller  hereby  covenants  and agrees that, if any
material defect is not so corrected or cured, the Seller will, not later than 60
days after the Trustee's  notice to it referred to above respecting such defect,
either (i)  repurchase  the related  Mortgage  Loan or any property  acquired in
respect thereof from the Trust Estate at a price equal to (a) 100% of the unpaid
principal  balance  of such  Mortgage  Loan  plus (b)  accrued  interest  at the
Mortgage  Interest Rate, less any Fixed Retained Yield,  through the last day of
the month in which such  repurchase  takes  place or (ii) if within two years of
the  Startup  Day,  or such  other  period  permitted  by the REMIC  Provisions,
substitute for any Mortgage Loan to which such material  defect  relates,  a new
mortgage loan (a "Substitute Mortgage Loan") having such characteristics so that
the  representations  and warranties of the Seller set forth in Section  2.03(b)
hereof (other than Section  2.03(b)(i))  would not have been  incorrect had such
Substitute  Mortgage Loan originally been a Mortgage Loan. In no event shall any
Substitute  Mortgage Loan have an unpaid  principal  balance,  as of the date of
substitution,  greater  than the  Scheduled  Principal  Balance  (reduced by the
scheduled payment of principal due on the Due Date in the month of substitution)
of the Mortgage Loan for which it is substituted.  In addition,  such Substitute
Mortgage  Loan  shall  have a  Loan-to-Value  Ratio  less than or equal to and a
Mortgage  Interest  Rate  equal to that of the  Mortgage  Loan  for  which it is
substituted.

            In the case of a repurchased Mortgage Loan or property, the purchase
price shall be deposited by the Seller in the Certificate  Account maintained by
the Master  Servicer  pursuant  to  Section  3.01.  In the case of a  Substitute
Mortgage Loan, the Owner Mortgage Loan File relating  thereto shall be delivered
to the Trustee and the Substitution Principal Amount, together with (i) interest
on such  Substitution  Principal Amount at the applicable Net Mortgage  Interest
Rate to the following Due Date of such Mortgage Loan which is being  substituted
for and (ii) an amount equal to the aggregate  amount of  unreimbursed  Periodic
Advances  in respect of interest  previously  made by the  Servicer,  the Master
Servicer or the Trustee with respect to such Mortgage  Loan,  shall be deposited
in the Certificate  Account. The Monthly Payment on the Substitute Mortgage Loan
for the Due Date in the  month of  substitution  shall  not be part of the Trust
Estate. Upon receipt by the Trustee of written  notification of any such deposit
signed by an officer of the Seller,  or the new Owner Mortgage Loan File, as the
case may be, the Trustee shall release to the Seller the related Owner  Mortgage
Loan  File and  shall  execute  and  deliver  such  instrument  of  transfer  or
assignment,  in each case without recourse, as shall be necessary to vest in the
Seller  legal  and  beneficial  ownership  of such  substituted  or  repurchased
Mortgage Loan or property.  It is understood  and agreed that the  obligation of
the Seller to substitute a new Mortgage Loan for or repurchase any Mortgage Loan
or property as to which such a material defect in a constituent  document exists
shall  constitute  the sole  remedy  respecting  such  defect  available  to the
Certificateholders  or the  Trustee  on  behalf of the  Certificateholders.  The
failure of the Trustee to give any notice  contemplated herein within forty-five
(45) days after the execution of this Agreement  shall not affect or relieve the
Seller's  obligation  to  repurchase  any Mortgage Loan pursuant to this Section
2.02.

            The Trustee may, concurrently with the execution and delivery hereof
or at any time thereafter, enter into a Custodial Agreement substantially in the
form of Exhibit E hereto  pursuant to which the Trustee  appoints a Custodian to
hold the Mortgage  Notes,  the Mortgages,  the  assignments  and other documents
related to the Mortgage Loans received by the Trustee,  in trust for the benefit
of all present and future  Certificateholders,  which may  provide,  among other
things,  that the Custodian shall conduct the review of such documents  required
under the first paragraph of this Section 2.02.

            SECTION 2.03  REPRESENTATIONS  AND WARRANTIES OF THE MASTER SERVICER
AND THE SELLER.

            (a) The  Master  Servicer  hereby  represents  and  warrants  to the
Trustee for the benefit of Certificateholders  that, as of the date of execution
of this Agreement:

            (i) The Master  Servicer  is a  national  banking  association  duly
      chartered  and  validly  existing in good  standing  under the laws of the
      United States;

            (ii) The  execution  and  delivery of this  Agreement  by the Master
      Servicer  and its  performance  and  compliance  with  the  terms  of this
      Agreement  will not violate  the Master  Servicer's  corporate  charter or
      by-laws or  constitute a default (or an event which,  with notice or lapse
      of time,  or both,  would  constitute a default)  under,  or result in the
      breach of, any material  contract,  agreement or other instrument to which
      the Master  Servicer is a party or which may be  applicable  to the Master
      Servicer or any of its assets;

            (iii) This  Agreement,  assuming due  authorization,  execution  and
      delivery by the Trustee and the  Seller,  constitutes  a valid,  legal and
      binding  obligation  of the  Master  Servicer,  enforceable  against it in
      accordance  with  the  terms  hereof  subject  to  applicable  bankruptcy,
      insolvency,  reorganization,  moratorium  and  other  laws  affecting  the
      enforcement of creditors'  rights  generally and to general  principles of
      equity,  regardless  of  whether  such  enforcement  is  considered  in  a
      proceeding in equity or at law;

            (iv) The Master Servicer is not in default with respect to any order
      or decree of any court or any order,  regulation or demand of any federal,
      state,   municipal  or  governmental  agency,  which  default  might  have
      consequences  that would  materially  and  adversely  affect the condition
      (financial  or  other)  or  operations  of  the  Master  Servicer  or  its
      properties or might have  consequences  that would affect its  performance
      hereunder; and

            (v) No  litigation  is  pending  or,  to  the  best  of  the  Master
      Servicer's  knowledge,  threatened against the Master Servicer which would
      prohibit its entering into this  Agreement or performing  its  obligations
      under this Agreement.

            It is understood and agreed that the  representations and warranties
set forth in this Section 2.03(a) shall survive delivery of the respective Owner
Mortgage Loan Files to the Trustee or the Custodian.

            (b) The Seller hereby represents and warrants to the Trustee for the
benefit  of  Certificateholders  that,  as of the  date  of  execution  of  this
Agreement,  with respect to the Mortgage  Loans,  or each Mortgage  Loan, as the
case may be:

            (i) The information set forth in the Mortgage Loan Schedule was true
      and correct in all material respects at the date or dates respecting which
      such information is furnished as specified in the Mortgage Loan Schedule;

            (ii) Immediately  prior to the transfer and assignment  contemplated
      herein, the Seller was 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 property therein described,  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 related
      Mortgaged  Property is a  condominium  unit,  any lien for common  charges
      permitted by statute or homeowners  association fees; and if the Mortgaged
      Property consists of shares of a cooperative housing corporation, any lien
      for  amounts  due  to  the  cooperative  housing  corporation  for  unpaid
      assessments  or  charges  or  any  lien  of any  assignment  of  rents  or
      maintenance expenses secured by the real property owned by the cooperative
      housing  corporation;  and any  security  agreement,  chattel  mortgage or
      equivalent  document  related to, and  delivered  to the Trustee or to the
      Custodian  with,  any  Mortgage  establishes  in the  Seller  a valid  and
      subsisting 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 or the related  Mortgage
      Note in any material  respect,  satisfied,  canceled or  subordinated  the
      Mortgage in whole or in part,  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 is reflected in an agreement  delivered to the Trustee or the Custodian
      pursuant to Section 2.01;

            (v) All taxes,  governmental  assessments,  insurance premiums,  and
      water, sewer and municipal charges,  which previously became due and owing
      have been paid, or an escrow of funds has been established,  to the extent
      permitted by law, in an amount sufficient to pay for every such item which
      remains  unpaid;  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  Subsidy  Loan  arrangement)  for the
      payment of any  amount  required  by the  Mortgage,  except  for  interest
      accruing from the date of the Mortgage Note or date of disbursement of the
      Mortgage Loan proceeds,  whichever is later,  to the day which precedes by
      thirty days the first Due Date under the related Mortgage Note;

            (vi) The Mortgaged Property is undamaged by water, fire, earthquake,
      earth movement other than earthquake, windstorm, flood, tornado or similar
      casualty  (excluding  casualty  from the presence of  hazardous  wastes or
      hazardous substances, as to which the Seller makes no representations), 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 and 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;

            (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 Co-op  Shares  and
      Mortgage  Loans secured by  residential  long-term  leases,  the Mortgaged
      Property  consists  of a fee simple  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 related 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 and no Mortgage  Loan had more than
      one delinquency in the 12 months preceding the Cut-Off Date;

            (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 escrow funds for the completion of swimming pools); 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 Closing Date;

            (xv) The  Mortgage  Loan  (except  any  Mortgage  Loan  secured by a
      Mortgaged Property located in any jurisdiction,  as to which an opinion of
      counsel of the type customarily  rendered in such  jurisdiction in lieu of
      title insurance is instead  received) is covered by an American Land Title
      Association 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,  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 of the  Mortgaged  Property and (C) the maximum
      amount of insurance which was available under the National Flood Insurance
      Act of  1968,  as  amended;  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 the 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;  the
      Seller  has  not  waived  any  default,  breach,  violation  or  event  of
      acceleration;  and no  foreclosure  action is currently  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 the Mortgage
      Note or 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;

            (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 residential property,  which may include a
      detached  home,  townhouse,  condominium  unit or a unit in a planned unit
      development  or, in the case of Mortgage  Loans  secured by Co-op  Shares,
      leases or occupancy agreements;

            (xxiii)  The  Mortgage  Loan is a  "qualified  mortgage"  within the
      meaning of Section 860G(a)(3) of the Code;

            (xxiv) With respect to each Mortgage where a lost note affidavit has
      been  delivered to the Trustee in place of the related  Mortgage Note, the
      related Mortgage Note is no longer in existence;

            (xxv) In the event that the  Mortgagor  is an inter  vivos  "living"
      trust,  (i) such trust is in compliance  with FNMA or FHLMC  standards for
      inter vivos trusts and (ii)  holding  title to the  Mortgaged  Property in
      such trust will not diminish any rights as a creditor  including the right
      to  full  title  to  the  Mortgaged  Property  in  the  event  foreclosure
      proceedings are initiated; and

            (xxvi) If the  Mortgage  Loan is secured by a long-term  residential
      lease,  (1) the lessor under the lease holds a fee simple  interest in the
      land; (2) the terms of such lease  expressly  permit the mortgaging of the
      leasehold estate, the assignment of the lease without the lessor's consent
      and the  acquisition  by the holder of the  Mortgage  of the rights of the
      lessee upon  foreclosure  or assignment in lieu of  foreclosure or provide
      the holder of the Mortgage with substantially similar protections; (3) the
      terms of such  lease do not (a) allow  the  termination  thereof  upon the
      lessee's  default  without the holder of the  Mortgage  being  entitled to
      receive  written  notice of, and  opportunity to cure,  such default,  (b)
      allow the  termination  of the lease in the event of damage or destruction
      as long as the  Mortgage is in  existence,  (c) prohibit the holder of the
      Mortgage from being insured (or receiving proceeds of insurance) under the
      hazard insurance policy or policies relating to the Mortgaged  Property or
      (d) permit any increase in rent other than  pre-established  increases set
      forth in the lease;  (4) the original  term of such lease is not less than
      15 years; (5) the term of such lease does not terminate  earlier than five
      years after the maturity date of the Mortgage  Note; and (6) the Mortgaged
      Property  is  located  in a  jurisdiction  in which  the use of  leasehold
      estates in  transferring  ownership in residential  properties is a widely
      accepted practice.

            Notwithstanding the foregoing,  no representations or warranties are
made by the Seller as to the environmental  condition of any Mortgaged Property;
the absence,  presence or effect of hazardous wastes or hazardous  substances on
any Mortgaged  Property;  any casualty  resulting from the presence or effect of
hazardous  wastes  or  hazardous  substances  on,  near or  emanating  from  any
Mortgaged  Property;  the  impact  on  Certificateholders  of any  environmental
condition  or  presence  of any  hazardous  substance  on or near any  Mortgaged
Property;  or the  compliance of any Mortgaged  Property with any  environmental
laws, nor is any agent,  person or entity  otherwise  affiliated with the Seller
authorized  or able to make any such  representation,  warranty or assumption of
liability relative to any Mortgaged Property. In addition, no representations or
warranties are made by the Seller with respect to the absence or effect of fraud
in the origination of any Mortgage Loan.

            It is understood and agreed that the  representations and warranties
set forth in this Section 2.03(b) shall survive delivery of the respective Owner
Mortgage Loan Files to the Trustee and shall inure to the benefit of the Trustee
notwithstanding any restrictive or qualified endorsement or assignment.

            (c) Upon discovery by either the Seller,  the Master  Servicer,  the
Trustee or the Custodian that any of the  representations and warranties made in
subsection (b) above is not accurate (referred to herein as a "breach") and that
such  breach   materially   and   adversely   affects  the   interests   of  the
Certificateholders  in the related  Mortgage  Loan, the party  discovering  such
breach shall give prompt  written  notice to the other  parties  (any  Custodian
being so obligated under a Custodial  Agreement).  Within 60 days of the earlier
of its  discovery or its receipt of notice of any such breach,  the Seller shall
cure such breach in all  material  respects or shall either (i)  repurchase  the
Mortgage Loan or any property  acquired in respect thereof from the Trust Estate
at a price equal to (A) 100% of the unpaid  principal  balance of such  Mortgage
Loan  plus (B)  accrued  interest  at the Net  Mortgage  Interest  Rate for such
Mortgage  Loan through the last day of the month in which such  repurchase  took
place or (ii) if within  two years of the  Startup  Day,  or such  other  period
permitted by the REMIC  Provisions,  substitute  for such  Mortgage  Loan in the
manner described in Section 2.02. The purchase price of any repurchase described
in this paragraph and the Substitution  Principal  Amount,  if any, plus accrued
interest  thereon and the other amounts  referred to in Section  2.02,  shall be
deposited  in the  Certificate  Account.  It is  understood  and agreed that the
obligation of the Seller to  repurchase  or substitute  for any Mortgage Loan or
property  as to  which  such a  breach  has  occurred  and is  continuing  shall
constitute   the   sole   remedy    respecting   such   breach    available   to
Certificateholders  or the  Trustee  on behalf of  Certificateholders,  and such
obligation shall survive until termination of the Trust Estate hereunder.

            SECTION 2.04 EXECUTION AND DELIVERY OF CERTIFICATES.

            The Trustee  acknowledges the assignment to it of the Mortgage Loans
and the delivery of the Owner Mortgage Loan Files to it, and,  concurrently with
such  delivery,  (i)  acknowledges  the issuance of and hereby  declares that it
holds the Uncertificated  Lower-Tier Interests on behalf of the Upper-Tier REMIC
and  Certificateholders and (ii) has executed and delivered to or upon the order
of the Seller, in exchange for the Mortgage Loans and Uncertificated  Lower-Tier
Interests  together with all other assets  included in the  definition of "Trust
Estate",  receipt of which is hereby  acknowledged,  Certificates  in authorized
denominations  which,  together with the  Uncertificated  Lower-Tier  Interests,
evidence ownership of the entire Trust Estate.

            SECTION 2.05 DESIGNATION OF CERTIFICATES; DESIGNATION OF STARTUP DAY
AND LATEST POSSIBLE MATURITY DATE.

            The Seller  hereby  designates  the Classes of Class A  Certificates
(other than the Class A-R and Class A-LR  Certificates) and the Classes of Class
B Certificates  as classes of "regular  interests" and the Class A-R Certificate
as the single  class of  "residual  interest"  in the  Upper-Tier  REMIC for the
purposes of Code Sections  860G(a)(1) and 860G(a)(2),  respectively.  The Seller
hereby further  designates the Class A-L1 Interest,  Class A-L5 Interest,  Class
A-L7 Interest,  Class A-L8 Interest, Class A-L12 Interest, Class A-L14 Interest,
Class A-LPO  Interest,  Class A-LUR  Interest,  Class B-L1 Interest,  Class B-L2
Interest,  Class B-L3  Interest,  Class B-L4  Interest,  Class B-L5 Interest and
Class  B-L6  Interest  as  classes  of  "regular  interests"  and the Class A-LR
Certificate as the single class of "residual  interest" in the Lower-Tier  REMIC
for the purposes of Code Sections 860G(a)(1) and 860G(a)(2),  respectively.  The
Closing Date is hereby designated as the "Startup Day" of each of the Upper-Tier
REMIC and Lower-Tier  REMIC within the meaning of Code Section  860G(a)(9).  The
"latest possible maturity date" of the regular interests in the Upper-Tier REMIC
and Lower-Tier REMIC is June 25, 2029 for purposes of Code Section 860G(a)(1).


<PAGE>

                                   ARTICLE III

                  ADMINISTRATION OF THE TRUST ESTATE: SERVICING
                              OF THE MORTGAGE LOANS

            SECTION 3.01 CERTIFICATE ACCOUNT.

            (a) The Master  Servicer shall  establish and maintain a Certificate
Account for the deposit of funds received by the Master Servicer with respect to
the Mortgage Loans  serviced by each Servicer  pursuant to each of the Servicing
Agreements.  Such account shall be maintained as an Eligible Account. The Master
Servicer  shall give notice to each  Servicer  and the Seller of the location of
the Certificate Account and of any change in the location thereof.

            (b) The Master Servicer shall deposit into the  Certificate  Account
on the day of receipt  thereof  all  amounts  received  by it from any  Servicer
pursuant to any of the Servicing  Agreements,  and shall,  in addition,  deposit
into the  Certificate  Account  the  following  amounts,  in the case of amounts
specified  in clause  (i),  not later than the  Distribution  Date on which such
amounts are required to be distributed to Certificateholders and, in the case of
the amounts  specified  in clause  (ii),  not later than the  Business  Day next
following the day of receipt and posting by the Master Servicer:

            (i) Periodic Advances pursuant to Section 3.03(a) made by the Master
      Servicer or the  Trustee,  if any and any amounts  deemed  received by the
      Master Servicer pursuant to Section 3.01(d); and

            (ii) in the case of any  Mortgage  Loan that is  repurchased  by the
      Seller pursuant to Section 2.02 or 2.03 or that is auctioned by the Master
      Servicer  pursuant to Section  3.08 or  purchased  by the Master  Servicer
      pursuant to Section 3.08 or 9.01,  the purchase  price  therefor or, where
      applicable,  any Substitution Principal Amount and any amounts received in
      respect of the interest portion of unreimbursed Periodic Advances.

            (c) The Master  Servicer  shall  cause the funds in the  Certificate
Account to be invested in Eligible  Investments.  No such  Eligible  Investments
will be sold or  disposed  of at a gain  prior to  maturity  unless  the  Master
Servicer has received an Opinion of Counsel or other evidence satisfactory to it
that such sale or  disposition  will not cause the Trust Estate to be subject to
Prohibited Transactions Tax, otherwise subject the Trust Estate to tax, or cause
either of the Upper-Tier  REMIC or the Lower-Tier  REMIC to fail to qualify as a
REMIC while any  Certificates  are  outstanding.  Any amounts  deposited  in the
Certificate  Account  prior to the  Distribution  Date shall be invested for the
account  of the Master  Servicer  and any  investment  income  thereon  shall be
additional  compensation to the Master Servicer for services rendered under this
Agreement.  The amount of any losses incurred in respect of any such investments
shall be deposited in the Certificate  Account by the Master Servicer out of its
own funds immediately as realized.

            (d) For  purposes of this  Agreement,  the Master  Servicer  will be
deemed to have received from a Servicer on the  applicable  Remittance  Date for
such funds all amounts deposited by such Servicer into the Custodial Account for
P&I maintained in accordance with the applicable  Servicing  Agreement,  if such
Custodial  Account  for  P&I is not an  Eligible  Account  as  defined  in  this
Agreement,  to the extent such amounts are not  actually  received by the Master
Servicer  on such  Remittance  Date as a result of the  bankruptcy,  insolvency,
receivership or other financial distress of the depository  institution in which
such  Custodial  Account  for P&I is being held.  To the extent that  amounts so
deemed to have been received by the Master Servicer are subsequently remitted to
the Master  Servicer,  the Master  Servicer  shall be  entitled  to retain  such
amounts.

            SECTION 3.02 PERMITTED WITHDRAWALS FROM THE CERTIFICATE ACCOUNT.

            (a) The Master  Servicer  may, from time to time,  make  withdrawals
from the Certificate Account for the following purposes (limited, in the case of
Servicer  reimbursements,  to cases where funds in the respective  Custodial P&I
Account are not sufficient therefor):

            (i) to reimburse  the Master  Servicer,  the Trustee or any Servicer
      for Periodic  Advances made by the Master Servicer or the Trustee pursuant
      to Section  3.03(a) or any Servicer  pursuant to any  Servicing  Agreement
      with respect to previous  Distribution  Dates, such right to reimbursement
      pursuant to this subclause (i) being limited to amounts  received on or in
      respect  of  particular  Mortgage  Loans  (including,  for  this  purpose,
      Liquidation Proceeds,  REO Proceeds and proceeds from the purchase,  sale,
      repurchase or  substitution  of Mortgage  Loans pursuant to Sections 2.02,
      2.03, 3.08 or 9.01) respecting which any such Periodic Advance was made;

            (ii) to reimburse any Servicer,  the Master  Servicer or the Trustee
      for any  Periodic  Advances  determined  in  good  faith  to  have  become
      Nonrecoverable   Advances   provided,   however,   that  any   portion  of
      Nonrecoverable   Advances  representing  Fixed  Retained  Yield  shall  be
      reimbursable only from amounts  constituting  Fixed Retained Yield and not
      from the assets of the Trust Estate;

            (iii)  to  reimburse  the  Master  Servicer  or  any  Servicer  from
      Liquidation  Proceeds for Liquidation Expenses and for amounts expended by
      the Master  Servicer or any Servicer  pursuant  hereto or to any Servicing
      Agreement,  respectively, in good faith in connection with the restoration
      of damaged property or for foreclosure expenses;

            (iv) from any  Mortgagor  payment on account  of  interest  or other
      recovery  (including  Net  REO  Proceeds)  with  respect  to a  particular
      Mortgage  Loan,  to pay the  Master  Servicing  Fee with  respect  to such
      Mortgage Loan to the Master Servicer;

            (v) to reimburse  the Master  Servicer,  any Servicer or the Trustee
      (or, in certain cases, the Seller) for expenses  incurred by it (including
      taxes  paid  on  behalf  of  the  Trust  Estate)  and  recoverable  by  or
      reimbursable  to it  pursuant to Section  3.03(c),  3.03(d) or 6.03 or the
      second  sentence  of  Section  8.14(a)  or  pursuant  to  such  Servicer's
      Servicing Agreement, provided such expenses are "unanticipated" within the
      meaning of the REMIC Provisions;

            (vi) to pay to the Seller or other  purchaser  with  respect to each
      Mortgage  Loan or  property  acquired  in  respect  thereof  that has been
      repurchased  or  replaced  pursuant to Section  2.02 or 2.03 or  auctioned
      pursuant to Section 3.08 or to pay to the Master  Servicer with respect to
      each Mortgage Loan or property  acquired in respect  thereof that has been
      purchased  pursuant to Section 3.08 or 9.01, all amounts  received thereon
      and not  required  to be  distributed  as of the date on which the related
      repurchase  or  purchase   price  or  Scheduled   Principal   Balance  was
      determined;

            (vii) to remit  funds to the Paying  Agent in the amounts and in the
      manner provided for herein;

            (viii)  to pay to the  Master  Servicer  any  interest  earned on or
      investment income with respect to funds in the Certificate Account;

            (ix)  to  pay  to  the  Master  Servicer  or  any  Servicer  out  of
      Liquidation Proceeds allocable to interest the amount of any unpaid Master
      Servicing  Fee or  Servicing  Fee (as  adjusted  pursuant  to the  related
      Servicing  Agreement) and any unpaid assumption fees, late payment charges
      or other Mortgagor charges on the related Mortgage Loan;

            (x) to withdraw from the Certificate Account any amount deposited in
      the Certificate Account that was not required to be deposited therein;

            (xi) to clear and  terminate  the  Certificate  Account  pursuant to
      Section 9.01; and

            (xii) to pay to  Norwest  Mortgage  from any  Mortgagor  payment  on
      account of interest or other  recovery  (including  Net REO Proceeds) with
      respect to a particular  Mortgage Loan, the Fixed Retained  Yield, if any,
      with respect to such Mortgage Loan; provided,  however,  that with respect
      to any payment of interest received by the Master Servicer in respect of 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,  only that
      portion of such payment of interest  that bears the same  relationship  to
      the total amount of such payment of interest as the Fixed  Retained  Yield
      Rate,  if any,  in respect  of such  Mortgage  Loan bears to the  Mortgage
      Interest Rate shall be allocated to the Fixed  Retained Yield with respect
      thereto.

            (b) The Master Servicer shall keep and maintain separate accounting,
on a Mortgage  Loan by Mortgage Loan basis,  for the purpose of  justifying  any
payment to and withdrawal from the Certificate Account.

            SECTION 3.03 ADVANCES BY MASTER SERVICER AND TRUSTEE.

            (a) In the  event an  Other  Servicer  fails  to make  any  required
Periodic  Advances of principal  and interest on a Mortgage  Loan as required by
the related Other Servicing  Agreement prior to the Distribution  Date occurring
in the month during  which such  Periodic  Advance is due,  the Master  Servicer
shall make Periodic  Advances to the extent  provided  hereby.  In addition,  if
under the terms of an Other Servicing Agreement,  the applicable Servicer is not
required to make  Periodic  Advances  on a Mortgage  Loan or REO  Mortgage  Loan
through the  liquidation  of such Mortgage Loan or REO Mortgage Loan, the Master
Servicer to the extent provided hereby shall make the Periodic  Advances thereon
during the period the Servicer is not  obligated to do so. In the event  Norwest
Mortgage fails to make any required  Periodic Advances of principal and interest
on a Mortgage Loan as required by the Norwest  Servicing  Agreement prior to the
Distribution  Date occurring in the month during which such Periodic  Advance is
due,  the  Trustee  shall,  to the extent  required by Section  8.15,  make such
Periodic  Advance to the extent provided  hereby,  provided that the Trustee has
previously  received the  certificate  of the Master  Servicer  described in the
following  sentence.  The Master  Servicer  shall  certify to the  Trustee  with
respect  to any such  Distribution  Date (i) the  amount  of  Periodic  Advances
required of Norwest  Mortgage or such Other  Servicer,  as the case may be, (ii)
the amount actually  advanced by Norwest Mortgage or such Other Servicer,  (iii)
the amount that the Trustee or Master Servicer is required to advance hereunder,
including any amount the Master Servicer is required to advance  pursuant to the
second sentence of this Section 3.03(a) and (iv) whether the Master Servicer has
determined  that  it  reasonably  believes  that  such  Periodic  Advance  is  a
Nonrecoverable Advance. Amounts advanced by the Trustee or Master Servicer shall
be  deposited  in the  Certificate  Account on the  related  Distribution  Date.
Notwithstanding the foregoing,  neither the Master Servicer nor the Trustee will
be obligated  to make a Periodic  Advance  that it  reasonably  believes to be a
Nonrecoverable  Advance. The Trustee may conclusively rely for any determination
to be made by it hereunder upon the  determination of the Master Servicer as set
forth in its certificate.

            (b) To the  extent an Other  Servicer  fails to make an  advance  on
account of the taxes or  insurance  premiums  with  respect  to a Mortgage  Loan
required pursuant to the related Other Servicing Agreement,  the Master Servicer
shall,  if the Master  Servicer  knows of such failure of the Servicer,  advance
such funds and take such steps as are  necessary  to pay such taxes or insurance
premiums.  To the extent Norwest Mortgage fails to make an advance on account of
the taxes or  insurance  premiums  with  respect  to a  Mortgage  Loan  required
pursuant to the Norwest Servicing  Agreement,  the Master Servicer shall, if the
Master  Servicer  knows of such  failure  of  Norwest  Mortgage,  certify to the
Trustee that such failure has occurred. Upon receipt of such certification,  the
Trustee  shall  advance  such funds and take such steps as are  necessary to pay
such taxes or insurance premiums.

            (c) The Master Servicer and the Trustee shall each be entitled to be
reimbursed  from the  Certificate  Account for any  Periodic  Advance made by it
under Section 3.03(a) to the extent described in Section 3.02(a)(i) and (a)(ii).
The Master Servicer and the Trustee shall be entitled to be reimbursed  pursuant
to Section  3.02(a)(v)  for any advance by it pursuant to Section  3.03(b).  The
Master  Servicer  shall  diligently  pursue  restoration  of such  amount to the
Certificate Account from the related Servicer. The Master Servicer shall, to the
extent it has not already  done so, upon the  request of the  Trustee,  withdraw
from the  Certificate  Account and remit to the Trustee any amounts to which the
Trustee is entitled as reimbursement  pursuant to Section 3.02 (a)(i),  (ii) and
(v).

            (d) Except as  provided  in Section  3.03(a)  and (b),  neither  the
Master  Servicer nor the Trustee  shall be required to pay or advance any amount
which any  Servicer  was  required,  but failed,  to deposit in the  Certificate
Account.

            SECTION 3.04 TRUSTEE TO  COOPERATE;  RELEASE OF OWNER  MORTGAGE LOAN
FILES.

            Upon the receipt by the Master  Servicer of a Request for Release in
connection  with the deposit by a Servicer into the  Certificate  Account of the
proceeds from a Liquidated  Loan or of a Prepayment in Full, the Master Servicer
shall  confirm to the Trustee  that all  amounts  required to be remitted to the
Certificate  Account  in  connection  with  such  Mortgage  Loan  have  been  so
deposited,  and shall  deliver  such  Request  for Release to the  Trustee.  The
Trustee  shall,  within five  Business Days of its receipt of such a Request for
Release,  release the related Owner Mortgage Loan File to the Master Servicer or
such  Servicer,  as requested by the Master  Servicer.  No expenses  incurred in
connection with any instrument of satisfaction or deed of reconveyance  shall be
chargeable to the Certificate Account.

            From  time  to  time  and  as  appropriate   for  the  servicing  or
foreclosure of any Mortgage Loan, including but not limited to, collection under
any insurance policies, or to effect a partial release of any Mortgaged Property
from the lien of the Mortgage,  the Servicer of such Mortgage Loan shall deliver
to the Master Servicer a Request for Release. Upon the Master Servicer's receipt
of any such Request for Release, the Master Servicer shall promptly forward such
request to the Trustee and the Trustee shall, within five Business Days, release
the related Owner Mortgage Loan File to the Master Servicer or such Servicer, as
requested by the Master  Servicer.  Any such Request for Release shall  obligate
the Master  Servicer  or such  Servicer,  as the case may be, to return each and
every  document  previously  requested  from the Owner Mortgage Loan File to the
Trustee by the twenty-first  day following the release  thereof,  unless (i) the
Mortgage Loan has been liquidated and the Liquidation  Proceeds  relating to the
Mortgage Loan have been deposited in the  Certificate  Account or (ii) the Owner
Mortgage Loan File or such document has been  delivered to an attorney,  or to a
public  trustee or other  public  official as required by law,  for  purposes of
initiating or pursuing legal action or other  proceedings for the foreclosure of
the  Mortgaged  Property  either  judicially or  non-judicially,  and the Master
Servicer has  delivered to the Trustee a certificate  of the Master  Servicer or
such Servicer  certifying as to the name and address of the Person to which such
Owner  Mortgage  Loan File or such  document  was  delivered  and the purpose or
purposes of such  delivery.  Upon  receipt of an  Officer's  Certificate  of the
Master Servicer or such Servicer  stating that such Mortgage Loan was liquidated
and  that all  amounts  received  or to be  received  in  connection  with  such
liquidation which are required to be deposited into the Certificate Account have
been so deposited,  or that such Mortgage Loan has become an REO Mortgage  Loan,
the Request for Release shall be released by the Trustee to the Master  Servicer
or such Servicer, as appropriate.

            Upon written certification of the Master Servicer or the Servicer of
a Mortgage Loan, the Trustee shall execute and deliver to the Master Servicer or
such Servicer, as directed by the Master Servicer, court pleadings, requests for
trustee's sale or other documents necessary to the foreclosure or trustee's sale
in respect of a  Mortgaged  Property  or to any legal  action  brought to obtain
judgment  against any  Mortgagor on the Mortgage Note or Mortgage or to obtain a
deficiency judgment,  or to enforce any other remedies or rights provided by the
Mortgage Note or Mortgage or otherwise  available at law or in equity. Each such
certification  shall  include a request  that such  pleadings  or  documents  be
executed  by the Trustee and a  statement  as to the reason  such  documents  or
pleadings  are  required  and that the  execution  and  delivery  thereof by the
Trustee will not invalidate or otherwise affect the lien of the Mortgage, except
for the termination of such a lien upon completion of the foreclosure proceeding
or trustee's sale.

            SECTION 3.05 REPORTS TO THE TRUSTEE; ANNUAL COMPLIANCE STATEMENTS.

            (a) Not later than 15 days after each Distribution  Date, the Master
Servicer  shall  deliver to the Trustee a statement  setting forth the status of
the Certificate  Account as of the close of business on such  Distribution  Date
stating that all distributions  required to be made by the Master Servicer under
this  Agreement  have been made (or, if any required  distribution  has not been
made by the Master  Servicer,  specifying  the nature  and status  thereof)  and
showing,  for the period  covered by such  statement,  the  aggregate  amount of
deposits into and withdrawals from such account for each category of deposit and
withdrawal  specified in Sections  3.01 and 3.02.  Such  statement may be in the
form of the then  current  FNMA  monthly  accounting  report for its  Guaranteed
Mortgage  Pass-Through Program with appropriate additions and changes, and shall
also include  information as to the aggregate unpaid principal balance of all of
the  Mortgage  Loans  as of the  close  of  business  as of the  last day of the
calendar month  immediately  preceding such  Distribution  Date.  Copies of such
statement shall be provided by the Trustee to any Certificateholder upon written
request, provided such statement is delivered, or caused to be delivered, by the
Master Servicer to the Trustee.

            (b) The Master  Servicer  shall  deliver to the Trustee on or before
May 30 of each year, a certificate  signed by an officer of the Master Servicer,
certifying  that (i) such  officer has  reviewed  the  activities  of the Master
Servicer  during  the  preceding  calendar  year  or  portion  thereof  and  its
performance  under  this  agreement  and  (ii) to the  best  of  such  officer's
knowledge, based on such review, the Master Servicer has performed and fulfilled
its  duties,  responsibilities  and  obligations  under  this  agreement  in all
material  respects  throughout such year, or, if there has been a default in the
fulfillment of any such duties, responsibilities or obligations, specifying each
such default known to such officer and the nature and status thereof, and, (iii)
(A)  the  Master   Servicer  has  received  from  each  Servicer  any  financial
statements, officer's certificates, accountant's statements or other information
required to be provided to the Master Servicer pursuant to the related Servicing
Agreement and (B) to the best of such officer's knowledge,  based on a review of
the information provided to the Master Servicer by each Servicer as described in
(iii)(A)   above,   each  Servicer  has  performed  and  fulfilled  its  duties,
responsibilities  and obligations under the related  Servicing  Agreement in all
material  respects  throughout such year, or, if there has been a default in the
fulfillment of any such duties, responsibilities or obligations, specifying each
such default known to such officer and the nature and status thereof.  Copies of
such   officers'   certificate   shall  be   provided  by  the  Trustee  to  any
Certificateholder  upon written request  provided such certificate is delivered,
or caused to be delivered, by the Master Servicer to the Trustee.

            SECTION 3.06 TITLE,  MANAGEMENT AND  DISPOSITION OF ANY REO MORTGAGE
LOAN.

            The Master  Servicer  shall  ensure that each REO  Mortgage  Loan is
administered  by the  related  Servicer  at all  times so that it  qualifies  as
"foreclosure  property" under the REMIC Provisions and that it does not earn any
"net income from  foreclosure  property" which is subject to tax under the REMIC
Provisions.  In the  event  that a  Servicer  is unable  to  dispose  of any REO
Mortgage Loan within the period  mandated by each of the  Servicing  Agreements,
the Master Servicer shall monitor such Servicer to verify that such REO Mortgage
Loan is auctioned to the highest  bidder within the period so specified.  In the
event of any such sale of REO Mortgage Loan,  the Trustee shall,  at the written
request of the Master Servicer and upon being supported with  appropriate  forms
therefor, within five Business Days of the deposit by the Master Servicer of the
proceeds of such sale or auction into the Certificate Account,  release or cause
to be released to the entity identified by the Master Servicer the related Owner
Mortgage Loan File and Servicer Mortgage Loan File and shall execute and deliver
such instruments of transfer or assignment,  in each case without  recourse,  as
shall be  necessary to vest in the auction  purchaser  title to the REO Mortgage
Loan and the Trustee  shall have no further  responsibility  with regard to such
Owner  Mortgage Loan File or Servicer  Mortgage Loan File.  Neither the Trustee,
the Master  Servicer  nor any  Servicer,  acting on behalf of the Trust  Estate,
shall  provide  financing  from the  Trust  Estate  to any  purchaser  of an REO
Mortgage Loan.

            SECTION 3.07  AMENDMENTS TO SERVICING  AGREEMENTS,  MODIFICATION  OF
STANDARD PROVISIONS.

            (a) Subject to the prior written consent of the Trustee  pursuant to
Section  3.07(b),  the  Master  Servicer  from time to time may,  to the  extent
permitted by the applicable  Servicing  Agreement,  make such  modifications and
amendments to such Servicing Agreement as the Master Servicer deems necessary or
appropriate  to confirm  or carry out more fully the intent and  purpose of such
Servicing  Agreement  and the duties,  responsibilities  and  obligations  to be
performed by the Servicer  thereunder.  Such  modifications  may only be made if
they are  consistent  with the REMIC  Provisions,  as evidenced by an Opinion of
Counsel.  Prior to the issuance of any  modification  or  amendment,  the Master
Servicer  shall  deliver to the Trustee such Opinion of Counsel and an Officer's
Certificate  setting forth (i) the provision  that is to be modified or amended,
(ii) the modification or amendment that the Master Servicer desires to issue and
(iii) the reason or reasons for such proposed amendment or modification.

            (b) The Trustee  shall  consent to any  amendment or supplement to a
Servicing Agreement proposed by the Master Servicer pursuant to Section 3.07(a),
which   consent   and   amendment   shall  not   require   the  consent  of  any
Certificateholder  if it is (i)  for  the  purpose  of  curing  any  mistake  or
ambiguity or to further  effect or protect the rights of the  Certificateholders
or (ii) for any other  purpose,  provided such  amendment or supplement for such
other   purpose   cannot    reasonably   be   expected   to   adversely   affect
Certificateholders.  The lack of reasonable  expectation of an adverse effect on
Certificateholders may be established through the delivery to the Trustee of (i)
an  Opinion of Counsel to such  effect or (ii)  written  notification  from each
Rating Agency to the effect that such amendment or supplement will not result in
reduction  of  the  current  rating  assigned  by  that  Rating  Agency  to  the
Certificates.  Notwithstanding  the two  immediately  preceding  sentences,  the
Trustee  may,  in its  discretion,  decline to enter into or consent to any such
supplement  or  amendment  if its own  rights,  duties  or  immunities  shall be
adversely affected.

            (c) (i)  Notwithstanding  anything to the  contrary in this  Section
      3.07,  the Master  Servicer from time to time may,  without the consent of
      any  Certificateholder,  or the Trustee, enter into an amendment (A) to an
      Other  Servicing  Agreement for the purpose of (i) eliminating or reducing
      Month  End  Interest  and  (ii)  providing  for  the  remittance  of  Full
      Unscheduled  Principal  Receipts by the applicable  Servicer to the Master
      Servicer  not later than the 24th day of each month (or if such day is not
      a  Business  Day,  on the  previous  Business  Day) or (B) to the  Norwest
      Servicing Agreement for the purpose of changing the applicable  Remittance
      Date to the 18th day of each month (or if such day is not a Business  Day,
      on the previous Business Day).

            (ii) The Master  Servicer may direct Norwest  Mortgage to enter into
      an amendment to the Norwest Servicing Agreement for the purposes described
      in Sections 3.07(c)(i)(B) and 10.01(b)(iii).

            SECTION 3.08 OVERSIGHT OF SERVICING.

            The  Master  Servicer  shall  supervise,  monitor  and  oversee  the
servicing of the Mortgage  Loans by each  Servicer and the  performance  by each
Servicer of all services,  duties,  responsibilities and obligations that are to
be  observed  or  performed  by the  Servicer  under  its  respective  Servicing
Agreement.  In performing its obligations  hereunder,  the Master Servicer shall
act in a manner consistent with Accepted Master Servicing Practices and with the
Trustee's and the Certificateholders'  reliance on the Master Servicer, and in a
manner consistent with the terms and provisions of any insurance policy required
to be  maintained  by the  Master  Servicer  or any  Servicer  pursuant  to this
Agreement or any Servicing  Agreement.  The Master  Servicer  acknowledges  that
prior to taking certain  actions  required to service the Mortgage  Loans,  each
Servicing Agreement provides that the Servicer  thereunder must notify,  consult
with,  obtain the consent of or otherwise  follow the instructions of the Master
Servicer.  The Master Servicer is also given authority to waive  compliance by a
Servicer  with  certain  provisions  of its  Servicing  Agreement.  In each such
instance, the Master Servicer shall promptly instruct such Servicer or otherwise
respond  to such  Servicer's  request.  In no  event  will the  Master  Servicer
instruct  such  Servicer to take any action,  give any consent to action by such
Servicer  or  waive  compliance  by such  Servicer  with any  provision  of such
Servicer's  Servicing  Agreement if any resulting action or failure to act would
be  inconsistent  with the  requirements  of the Rating  Agencies that rated the
Certificates    or   would   otherwise   have   an   adverse   effect   on   the
Certificateholders. Any such action or failure to act shall be deemed to have an
adverse effect on the Certificateholders if such action or failure to act either
results in (i) the  downgrading  of the rating  assigned by any Rating Agency to
the Certificates,  (ii) the loss by the Upper-Tier REMIC or the Lower-Tier REMIC
of REMIC status for federal  income tax purposes or (iii) the  imposition of any
Prohibited  Transaction Tax or any federal taxes on either the Upper-Tier REMIC,
the Lower-Tier  REMIC or the Trust Estate.  The Master  Servicer shall have full
power and  authority in its sole  discretion  to take any action with respect to
the Trust Estate as may be  necessary  or  advisable to avoid the  circumstances
specified including clause (ii) or (iii) of the preceding sentence.

            For the  purposes  of  determining  whether  any  modification  of a
Mortgage  Loan shall be  permitted by the Trustee or the Master  Servicer,  such
modification  shall be construed as a substitution of the modified Mortgage Loan
for the Mortgage Loan originally  deposited in the Trust Estate if it would be a
"significant  modification"  within the  meaning of Section  1.860G-2(b)  of the
regulations of the U.S.  Department of the Treasury.  No  modification  shall be
approved  unless (i) the modified  Mortgage  Loan would  qualify as a Substitute
Mortgage Loan under Section 2.02 and (ii) with respect to any modification  that
occurs more than three  months after the Closing Date and is not the result of a
default or a reasonably  foreseeable  default under the Mortgage Loan,  there is
delivered  to the  Trustee an Opinion  of Counsel  (at the  expense of the party
seeking to modify the Mortgage Loan) to the effect that such modification  would
not be treated as giving rise to a new debt  instrument  for federal  income tax
purposes as described in the preceding sentence.

            During the term of this Agreement, the Master Servicer shall consult
fully with each  Servicer as may be  necessary  from time to time to perform and
carry out the Master  Servicer's  obligations  hereunder and otherwise  exercise
reasonable  efforts to  encourage  such  Servicer  to perform  and  observe  the
covenants,  obligations  and  conditions to be performed or observed by it under
its Servicing Agreement.

            The  relationship  of the Master  Servicer to the Trustee under this
Agreement is intended by the parties to be that of an independent contractor and
not that of a joint venturer, partner or agent.

            The Master  Servicer shall  administer the Trust Estate on behalf of
the Trustee and shall have full power and authority, acting alone or (subject to
Section  6.06) through one or more  subcontractors,  to do any and all things in
connection  with such  administration  which it may deem necessary or desirable.
Upon the execution and delivery of this Agreement,  and from time to time as may
be required  thereafter,  the Trustee shall  furnish the Master  Servicer or its
subcontractors  with any powers of attorney  and such other  documents as may be
necessary  or  appropriate  to  enable  the  Master  Servicer  to carry  out its
administrative duties hereunder.

            The Seller  shall be  entitled to  repurchase  at its option (i) any
defaulted  Mortgage  Loan or any Mortgage Loan as to which default is reasonably
foreseeable from the Trust Estate if, in the Seller's  judgment,  the default is
not likely to be cured by the  Mortgagor or (ii) any Mortgage  Loan in the Trust
Estate  which,  pursuant  to  paragraph  5(b)  of  the  Mortgage  Loan  Purchase
Agreement,  Norwest  Mortgage  requests the Seller to repurchase  and to sell to
Norwest Mortgage to facilitate the exercise of Norwest Mortgage's rights against
the  originator or a prior holder of such Mortgage  Loan. The purchase price for
any such  Mortgage  Loan shall be 100% of the unpaid  principal  balance of such
Mortgage Loan plus accrued  interest  thereon at the Mortgage  Interest Rate for
such Mortgage Loan,  through the last day of the month in which such  repurchase
occurs.  Upon the receipt of such  purchase  price,  the Master  Servicer  shall
provide to the  Trustee  the  certification  required  by  Section  3.04 and the
Trustee and the  Custodian,  if any,  shall  promptly  release to the Seller the
Owner Mortgage Loan File relating to the Mortgage Loan being repurchased.

            In the event that (i) the  Master  Servicer  determines  at any time
that,  notwithstanding  the  representations and warranties set forth in Section
2.03(b),  any Mortgage Loan is not a "qualified  mortgage" within the meaning of
Section  860G of the Code and (ii) the Master  Servicer is unable to enforce the
obligation of the Seller to purchase such Mortgage Loan pursuant to Section 2.02
within two months of such  determination,  the Master  Servicer shall cause such
Mortgage  Loan to be auctioned  to the highest  bidder and sold out of the Trust
Estate no later than the date 90 days after such determination.  In the event of
any such sale of a Mortgage Loan, the Trustee shall,  at the written  request of
the Master  Servicer and upon being supported with  appropriate  forms therefor,
within five Business Days of the deposit by the Master  Servicer of the proceeds
of such auction into the Certificate Account, release or cause to be released to
the entity  identified by the Master  Servicer the related  Owner  Mortgage Loan
File and  Servicer  Mortgage  Loan  File and  shall  execute  and  deliver  such
instruments of transfer or assignment,  in each case without recourse,  as shall
be necessary to vest in the auction purchaser title to the Mortgage Loan and the
Trustee shall have no further  responsibility with regard to such Owner Mortgage
Loan File or  Servicer  Mortgage  Loan File.  Neither  the  Trustee,  the Master
Servicer  nor any  Servicer,  acting  on behalf of the  Trustee,  shall  provide
financing from the Trust Estate to any purchaser of a Mortgage Loan.

            The Master Servicer,  on behalf of the Trustee,  shall,  pursuant to
the  Servicing  Agreements,  object to the  foreclosure  upon,  or other related
conversion of the ownership of, any Mortgaged  Property by the related  Servicer
if (i) the Master Servicer believes such Mortgaged  Property may be contaminated
with or  affected  by  hazardous  wastes or  hazardous  substances  or (ii) such
Servicer does not agree to administer such Mortgaged Property,  once the related
Mortgage  Loan becomes an REO Mortgage  Loan, in a manner which would not result
in a federal tax being imposed upon the Trust Estate or the Upper-Tier  REMIC or
Lower-Tier REMIC.

            The Master  Servicer  may enter into a special  servicing  agreement
with an unaffiliated  holder of 100%  Percentage  Interest of a Class of Class B
Certificates or a holder of a class of securities  representing interests in the
Class  B   Certificates   and/or  other   subordinated   mortgage   pass-through
certificates, such agreement to be substantially in the form of Exhibit M hereto
or  subject  to each  Rating  Agency's  acknowledgment  that the  ratings of the
Certificates in effect  immediately prior to the entering into of such agreement
would not be qualified,  downgraded or withdrawn and the Certificates  would not
be placed on credit review status (except for possible upgrading) as a result of
such agreement.  Any such agreement may contain  provisions  whereby such holder
may instruct the Master  Servicer to instruct a Servicer to the extent  provided
in  the  applicable   Servicing  Agreement  to  commence  or  delay  foreclosure
proceedings  with  respect  to  delinquent   Mortgage  Loans  and  will  contain
provisions  for the  deposit of cash by the holder that would be  available  for
distribution to  Certificateholders  if Liquidation  Proceeds are less than they
otherwise  may have been had the Servicer  acted in  accordance  with its normal
procedures.

            SECTION 3.09 TERMINATION AND SUBSTITUTION OF SERVICING AGREEMENTS.

            Upon  the  occurrence  of any  event  for  which a  Servicer  may be
terminated  pursuant  to its  Servicing  Agreement,  the Master  Servicer  shall
promptly  deliver  to the  Seller  and  the  Trustee  an  Officer's  Certificate
certifying  that an event has  occurred  which may justify  termination  of such
Servicing  Agreement,  describing the  circumstances  surrounding such event and
recommending  what action  should be taken by the Trustee  with  respect to such
Servicer.  If the Master Servicer  recommends  that such Servicing  Agreement be
terminated,  the Master Servicer's  certification  must state that the breach is
material  and not merely  technical  in nature.  Upon  written  direction of the
Master  Servicer,  based upon such  certification,  the Trustee  shall  promptly
terminate such Servicing Agreement.  Notwithstanding the foregoing, in the event
that (i) Norwest  Mortgage fails to make any advance,  as a consequence of which
the Trustee is  obligated  to make an advance  pursuant to Section 3.03 and (ii)
the Trustee provides Norwest Mortgage written notice of the failure to make such
advance and such failure shall continue unremedied for a period of 15 days after
receipt of such  notice,  the Trustee  shall  terminate  the  Norwest  Servicing
Agreement without the recommendation of the Master Servicer. The Master Servicer
shall  indemnify  the Trustee and hold it harmless  from and against any and all
claims,  liabilities,   costs  and  expenses  (including,   without  limitation,
reasonable  attorneys'  fees) arising out of, or assessed against the Trustee in
connection with termination of such Servicing  Agreement at the direction of the
Master Servicer. If the Trustee terminates such Servicing Agreement, the Trustee
may enter into a substitute  Servicing Agreement with the Master Servicer or, at
the Master  Servicer's  nomination,  with another  mortgage loan service company
acceptable  to the Trustee,  the Master  Servicer  and each Rating  Agency under
which the Master Servicer or such substitute servicer, as the case may be, shall
assume, satisfy, perform and carry out all liabilities, duties, responsibilities
and  obligations  that are to be, or  otherwise  were to have  been,  satisfied,
performed  and  carried out by such  Servicer  under such  terminated  Servicing
Agreement.  Until such time as the Trustee  enters into a  substitute  servicing
agreement  with  respect  to the  Mortgage  Loans  previously  serviced  by such
Servicer, the Master Servicer shall assume,  satisfy,  perform and carry out all
obligations  which otherwise were to have been satisfied,  performed and carried
out by such Servicer under its terminated  Servicing  Agreement.  However, in no
event shall the Master  Servicer be deemed to have assumed the  obligations of a
Servicer to advance payments of principal and interest on a delinquent  Mortgage
Loan in excess of the Master Servicer's  independent Periodic Advance obligation
under Section 3.03 of this Agreement. As compensation for the Master Servicer of
any  servicing  obligations  fulfilled  or assumed by the Master  Servicer,  the
Master  Servicer  shall be entitled  to any  servicing  compensation  to which a
Servicer would have been entitled if the Servicing  Agreement with such Servicer
had not been terminated.

            SECTION 3.10 APPLICATION OF NET LIQUIDATION PROCEEDS.

            For all purposes  under this  agreement,  Net  Liquidation  Proceeds
received from a Servicer shall be allocated first to accrued and unpaid interest
on the related Mortgage Loan and then to the unpaid principal balance thereof.

            SECTION 3.11 ACT REPORTS.

            The Master Servicer shall, on behalf of the Seller, make all filings
required  to be made by the  Seller  with  respect  to the Class A  Certificates
(other than the Class A-PO  Certificates) and the Class B-1, Class B-2 and Class
B-3 Certificates pursuant to the Securities Exchange Act of 1934, as amended.


<PAGE>



                                   ARTICLE IV

                    DISTRIBUTIONS IN RESPECT OF CERTIFICATES;
                         PAYMENTS TO CERTIFICATEHOLDERS;
                             STATEMENTS AND REPORTS

            SECTION 4.01 DISTRIBUTIONS.

            (a) (i) On each Distribution Date, the Pool Distribution Amount will
be applied in the following amounts,  to the extent the Pool Distribution Amount
is sufficient therefor, in the manner and in the order of priority as follows:

            first, to the Classes of Class A Certificates,  pro rata, based upon
      their respective  Interest  Accrual Amounts,  in an aggregate amount up to
      the sum of the  Class A  Interest  Accrual  Amount  with  respect  to such
      Distribution  Date;  provided  that  prior  to  the  applicable  Accretion
      Termination  Date,  an amount equal to the amount that would  otherwise be
      distributable in respect of interest to each Class of Accrual Certificates
      pursuant to this provision will instead be distributed in reduction of the
      Principal  Balances of certain  Classes of Class A  Certificates,  in each
      case in accordance with Section 4.01(b);

            second, to the Classes of Class A Certificates, pro rata, based upon
      their respective Class A Unpaid Interest Shortfalls,  respectively,  in an
      aggregate  amount up to the sum of the Aggregate  Class A Unpaid  Interest
      Shortfall;  provided that prior to the  applicable  Accretion  Termination
      Date, an amount equal to the amount that would otherwise be  distributable
      in  respect  of  unpaid  interest  shortfalls  to each  Class  of  Accrual
      Certificates  pursuant to this  provision  will instead be  distributed in
      reduction  of the  Principal  Balances  of  certain  Classes  of  Class  A
      Certificates, in each case in accordance with Section 4.01(b);

            third,  concurrently,  to the Class A  Certificates  (other than the
      Class A-PO Certificates) and the Class A-PO Certificates,  pro rata, based
      on their respective Class A Non-PO Optimal Principal Amount and Class A-PO
      Optimal  Principal  Amount,  (A) to the  Classes  of Class A  Certificates
      (other than the Class A-PO Certificates), in an aggregate amount up to the
      Class A Non-PO Optimal Principal Amount, such distribution to be allocated
      among such Classes in accordance with Section 4.01(b) or Section  4.01(c),
      as applicable,  and (B) to the Class A-PO  Certificates in an amount up to
      the Class A-PO Optimal Principal Amount;

            fourth,  to the Class A-PO Certificates in an amount up to the Class
      A-PO Deferred Amount from amounts otherwise  distributable (without regard
      to this Paragraph fourth) first to the Class B-6 Certificates  pursuant to
      Paragraph  twenty-second,  below,  second to the  Class  B-5  Certificates
      pursuant  to  Paragraph   nineteenth,   below,  third  to  the  Class  B-4
      Certificates  pursuant to Paragraph sixteenth,  below, fourth to the Class
      B-3 Certificates  pursuant to Paragraph  thirteenth,  below,  fifth to the
      Class B-2 Certificates pursuant to Paragraph tenth below, and sixth to the
      Class B-1 Certificates pursuant to Paragraph seventh below;

            fifth, to the Class B-1 Certificates in an amount up to the Interest
      Accrual  Amount  for the  Class  B-1  Certificates  with  respect  to such
      Distribution Date;

            sixth,  to the Class B-1  Certificates  in an amount up to the Class
      B-1 Unpaid Interest Shortfall;

            seventh,  to the Class B-1 Certificates in an amount up to the Class
      B-1  Optimal  Principal  Amount;   provided,   however,  that  the  amount
      distributable  to the Class B-1  Certificates  pursuant to this  Paragraph
      seventh  will be  reduced  by the  amount,  if any,  that  would have been
      distributable  to the Class  B-1  Certificates  hereunder  used to pay the
      Class A-PO Deferred Amount as provided in Paragraph fourth above;

            eighth,  to  the  Class  B-2  Certificates  in an  amount  up to the
      Interest  Accrual  Amount for the Class B-2  Certificates  with respect to
      such Distribution Date;

            ninth,  to the Class B-2  Certificates  in an amount up to the Class
      B-2 Unpaid Interest Shortfall;

            tenth,  to the Class B-2  Certificates  in an amount up to the Class
      B-2  Optimal  Principal  Amount;   provided,   however,  that  the  amount
      distributable  to the Class B-2  Certificates  pursuant to this  Paragraph
      tenth  will be  reduced  by the  amount,  if any,  that  would  have  been
      distributable  to the Class  B-2  Certificates  hereunder  used to pay the
      Class A-PO Deferred Amount as provided in Paragraph fourth above;

            eleventh,  to the  Class  B-3  Certificates  in an  amount up to the
      Interest  Accrual  Amount for the Class B-3  Certificates  with respect to
      such Distribution Date;

            twelfth,  to the Class B-3 Certificates in an amount up to the Class
      B-3 Unpaid Interest Shortfall;

            thirteenth,  to the  Class B-3  Certificates  in an amount up to the
      Class B-3 Optimal Principal  Amount;  provided,  however,  that the amount
      distributable  to the Class B-3  Certificates  pursuant to this  Paragraph
      thirteenth  will be reduced by the  amount,  if any,  that would have been
      distributable  to the Class  B-3  Certificates  hereunder  used to pay the
      Class A-PO Deferred Amount as provided in Paragraph fourth above;

            fourteenth,  to the  Class B-4  Certificates  in an amount up to the
      Interest  Accrual  Amount for the Class B-4  Certificates  with respect to
      such Distribution Date;

            fifteenth,  to the  Class  B-4  Certificates  in an amount up to the
      Class B-4 Unpaid Interest Shortfall;

            sixteenth,  to the  Class  B-4  Certificates  in an amount up to the
      Class B-4 Optimal Principal  Amount;  provided,  however,  that the amount
      distributable  to the Class B-4  Certificates  pursuant to this  Paragraph
      sixteenth  will be reduced  by the  amount,  if any,  that would have been
      distributable  to the Class  B-4  Certificates  hereunder  used to pay the
      Class A-PO Deferred Amount as provided in Paragraph fourth above;

            seventeenth,  to the Class B-5  Certificates  in an amount up to the
      Interest  Accrual  Amount for the Class B-5  Certificates  with respect to
      such Distribution Date;

            eighteenth,  to the  Class B-5  Certificates  in an amount up to the
      Class B-5 Unpaid Interest Shortfall;

            nineteenth,  to the  Class B-5  Certificates  in an amount up to the
      Class B-5 Optimal Principal  Amount;  provided,  however,  that the amount
      distributable  to the Class B-5  Certificates  pursuant to this  Paragraph
      nineteenth  will be reduced by the  amount,  if any,  that would have been
      distributable  to the Class  B-5  Certificates  hereunder  used to pay the
      Class A-PO Deferred Amount as provided in Paragraph fourth above;

            twentieth,  to the  Class  B-6  Certificates  in an amount up to the
      Interest  Accrual  Amount for the Class B-6  Certificates  with respect to
      such Distribution Date;

            twenty-first,  to the Class B-6  Certificates in an amount up to the
      Class B-6 Unpaid Interest Shortfall;

            twenty-second,  to the Class B-6 Certificates in an amount up to the
      Class B-6 Optimal Principal  Amount;  provided,  however,  that the amount
      distributable  to the Class B-6  Certificates  pursuant to this  Paragraph
      twenty-second  will be reduced by the amount, if any, that would have been
      distributable  to the Class  B-6  Certificates  hereunder  used to pay the
      Class A-PO Deferred Amount as provided in Paragraph fourth above; and

            twenty-third,  to the  Holder  of the  Class  A-R  Certificate,  any
      amounts remaining in the Upper-Tier Certificate Account, and to the Holder
      of the Class  A-LR  Certificate,  any  amounts  remaining  in the  Payment
      Account.

            Notwithstanding  the  foregoing,  after  the  Principal  Balance  or
notional  amount  of  any  Class  (other  than  the  Class  A-R  or  Class  A-LR
Certificates)  has been  reduced  to zero,  such Class  will be  entitled  to no
further  distributions of principal or interest (including,  without limitation,
any Unpaid Interest Shortfalls).

            In addition,  Net Foreclosure  Profits, if any, with respect to such
Distribution  Date minus any portion thereof  payable to a Servicer  pursuant to
Section  3.02(ix)  hereof shall be  distributed  to the Holder of the Class A-LR
Certificate.

            With respect to any  Distribution  Date, the amount of the Principal
Adjustment,  if any,  attributable to any Class of Class B Certificates  will be
allocated to the Classes of Class A  Certificates  (other than the Class A-6 and
Class  A-PO  Certificates)  and any Class of Class B  Certificates  with a lower
numerical designation pro rata based on their Principal Balances.

      (ii) Distributions on the  Uncertificated  Lower-Tier  Interests.  On each
Distribution  Date,  each  Uncertificated   Lower-Tier  Interest  shall  receive
distributions  in  respect  of  principal  in an amount  equal to the  amount of
principal  distributed  to its  respective  Corresponding  Upper-Tier  Class  or
Classes as provided  herein.  On each  Distribution  Date,  each  Uncertificated
Lower-Tier  Interest  shall receive  distributions  in respect of interest in an
amount equal to the Interest Accrual Amounts and Unpaid Interest Shortfalls,  as
the case may be, in respect of its Corresponding Upper-Tier Class or Classes, in
each case to the extent actually  distributed  thereon. In the case of the Class
A-L12  Interest,  an amount  equal to the  Interest  Accrual  Amounts and Unpaid
Interest Shortfalls of the Accrual Certificates which are added to the Principal
Balances  thereof,  will be added to the  Principal  Balance of the Class  A-L12
Interest. Such amounts distributed to the Uncertificated Lower-Tier Interests in
respect of principal  and interest  with  respect to any  Distribution  Date are
referred to herein collectively as the "Lower-Tier Distribution Amount."

            As of  any  date,  the  principal  balance  of  each  Uncertificated
Lower-Tier   Interest   equals  the   Principal   Balances  of  the   respective
Corresponding Upper-Tier Class or Classes. The initial principal balance of each
Uncertificated Lower-Tier Interest equals the Original Principal Balances of the
respective Corresponding Upper-Tier Class or Classes.

            The pass-through rate with respect to the Class A-L7 Interest, Class
A-L8 Interest, Class A-L12 Interest, Class A-L14 Interest, Class A-LUR Interest,
Class B-L1  Interest,  Class B-L2  Interest,  Class  B-L3  Interest,  Class B-L4
Interest, Class B-L5 Interest and Class B-L6 Interest shall be 6.500% per annum.
The  pass-through  rate with respect to the Class A-L1 Interest  shall be 6.000%
per annum. The pass-through rate for the Class A-L5 Interest shall be 8.000% per
annum. The Class A-LPO Interest is a principal-only interest and is not entitled
to  distributions of interest.  Any  Non-Supported  Interest  Shortfalls will be
allocated  to each  Uncertificated  Lower-Tier  Interest  in the  same  relative
proportions as interest is allocated to such Uncertificated Lower-Tier Interest.

            (b) The Class A-6  Certificates are  interest-only  Certificates and
are not entitled to distributions in respect of principal.

            On each  Distribution  Date occurring prior to the Cross-Over  Date,
the Class A Non-PO  Principal  Distribution  Amount will be allocated  among and
distributed  in  reduction of the  Principal  Balances of the Classes of Class A
Certificates  (other than the Principal Balance of the Class A-PO  Certificates)
in accordance with the following priorities:

            I.  On each  Distribution  Date  occurring  prior  to the  Accretion
      Termination Date for the Class A-12 Certificates, the Accrual Distribution
      Amount for the Class A-12 Certificates  will be allocated  sequentially as
      follows:

            first, concurrently,  to the Class A-7, and Class A-10 Certificates,
      pro rata, up to their respective  Reduction  Amounts for such Distribution
      Date;

            second,  concurrently  to the Class A-8 and Class A-9  Certificates,
      pro rata, up to their respective  Reduction  Amounts for such Distribution
      Date; and

            third; to the Class A-12  Certificates,  until the Principal Balance
      thereof has been reduced to zero;

            II.  On each  Distribution  Date  occurring  prior to the  Accretion
      Termination   Date,   for  the  Class  A-13   Certificates,   the  Accrual
      Distribution  Amount for the Class  A-13  Certificates  will be  allocated
      sequentially as follows:

            first,  sequentially,  pursuant to priorities  III.  second  through
      sixteenth below; and

            second, to the Class A-13 Certificates,  until the Principal Balance
      thereof has been reduced to zero;

            III.  The  Class  A  Non-PO   Principal  Amount  will  be  allocated
      sequentially as follows:

            first,  concurrently,  to the Class A-R and Class A-LR Certificates,
      pro rata, until the Principal  Balance of each such Class has been reduced
      to zero,

            second,  concurrently,  25% to the Class A-5 Certificates and 75% to
      the Class A-1  Certificates,  up to their respective PAC Principal Amounts
      for such Distribution Date;

            third,  concurrently,  until the Principal Balance of the Class A-11
      Certificates  has  been  reduced  to  $3,305,000,  25%  to the  Class  A-5
      Certificates  and  75%  to  the  Class  A-11  Certificates,  up  to  their
      respective PAC Principal Amounts for such Distribution Date;

            fourth,   concurrently,   25%  to  the   Class   A-5   Certificates,
      59.7976080957%  to the Class A-2  Certificates and  15.2023919043%  to the
      Class A-11 Certificates,  up to their respective PAC Principal Amounts for
      such Distribution Date;

            fifth,  concurrently,  25% to the Class A-5  Certificates and 75% to
      the Class A-3  Certificates,  up to their respective PAC Principal Amounts
      for such Distribution Date;

            sixth,  concurrently,  25% to the Class A-5  Certificates and 75% to
      the Class A-4  Certificates,  up to their respective PAC Principal Amounts
      for such Distribution Date;

            seventh, concurrently, to the Class A-7 and Class A-10 Certificates,
      pro rata, up to their respective  Reduction  Amounts for such Distribution
      Date;

            eighth,  concurrently,  to the Class A-8 and Class A-9 Certificates,
      pro rata, up to their respective  Reduction  Amounts for such Distribution
      Date;

            ninth,  to the Class 12  Certificates,  until the Principal  Balance
      thereof has been reduced to zero;


            tenth,  concurrently,  to the Class A-7 and Class A-10 Certificates,
      pro rata, without regard to their respective Reduction Amounts,  until the
      Principal Balance of each such Class has been reduced to zero;

            eleventh, concurrently, to the Class A-8 and Class A-9 Certificates,
      pro rata, without regard to their respective Reduction Amounts,  until the
      Principal Balance of each such Class has been reduced to zero;

            twelfth,  concurrently, 25% to the Class A-5 Certificates and 75% to
      the  Class  A-1  Certificates,  without  regard  to their  respective  PAC
      Principal   Amounts,   until  the  Principal  Balance  of  the  Class  A-1
      Certificates has been reduced to zero;

            thirteenth,  concurrently,  until the Principal Balance of the Class
      A-11  Certificates  has been reduced to  $3,305,000,  25% to the Class A-5
      Certificates  and 75% to the Class A-11  Certificates,  without  regard to
      their respective PAC Principal Amounts;

            fourteenth,   concurrently,  25%  to  the  Class  A-5  Certificates,
      59.7976080957%  to the Class A-2  Certificates and  15.2023919043%  to the
      Class A-11 Certificates,  without regard to their respective PAC Principal
      Amounts,  until the  Principal  Balances  of the Class A-2 and Class  A-11
      Certificates have been reduced to zero;

            fifteenth,  concurrently,  25% to the Class A-5 Certificates and 75%
      to the Class A-3  Certificates,  without  regard to their  respective  PAC
      Principal   Amounts,   until  the  Principal  Balance  of  the  Class  A-3
      Certificates has been reduced to zero;

            sixteenth;  concurrently,  25% to the Class A-5 Certificates and 75%
      to the Class A-4  Certificates,  without  regard to their  respective  PAC
      Principal Amounts, until the Principal Balance of each such Class has been
      reduced to zero; and

            seventeenth.   concurrently,  to  the  Class  A-13  and  Class  A-14
      Certificates, pro rata, until the Principal Balance of each such Class has
      been reduced to zero.

            As used above, the "PAC Principal  Amount" for any Distribution Date
and for any Class of PAC  Certificates  means the  amount,  if any,  that  would
reduce the Principal  Balance of such Class to the  percentage of its respective
Original  Principal  Balance shown in the tables set forth below with respect to
such Distribution Date.

            As used above, the "Reduction  Amount" for any Distribution Date and
for any Class of Scheduled  Certificates  means the amount,  if any,  that would
reduce the Principal  Balance of such Class to the  percentage of its respective
Original  Principal  Balance  shown in the  related  table with  respect to such
Distribution Date.

            The  following  tables  set  forth  for each  Distribution  Date the
planned Principal  Balances for each Class of PAC Certificates and the scheduled
Principal  Balances  for each Class of  Scheduled  Certificates,  expressed as a
percentage of the Original Principal Balance of such Class.

                           PLANNED PRINCIPAL BALANCES
                  AS PERCENTAGES OF ORIGINAL PRINCIPAL BALANCE

                             CLASS A-1 CERTIFICATES

<TABLE>
<CAPTION>
                           PERCENTAGE OF                        PERCENTAGE OF                          PERCENTAGE OF
                             ORIGINAL                             ORIGINAL                               ORIGINAL
  DISTRIBUTION DATE     PRINCIPAL BALANCE  DISTRIBUTION DATE  PRINCIPAL BALANCE   DISTRIBUTION DATE  PRINCIPAL BALANCE
  -----------------     -----------------  -----------------  -----------------   -----------------  -----------------
<S>                       <C>              <C>                  <C>               <C>                  <C>
Up to and including                        July 2001.......     58.48556790%      October 2001.....    13.88445260%
April 2001........        100.00000000%    August 2001.....     43.93811350%      November 2001
May 2001..........         86.52988040     September 2001..     29.06071770         and thereafter.     0.00000000
June 2001.........         72.68819650
</TABLE>




                             CLASS A-2 CERTIFICATES

<TABLE>
<CAPTION>
                        PERCENTAGE OF                          PERCENTAGE OF                          PERCENTAGE OF
                          ORIGINAL                               ORIGINAL                                ORIGINAL
 DISTRIBUTION DATE    PRINCIPAL BALANCE  DISTRIBUTION DATE   PRINCIPAL BALANCE  DISTRIBUTION DATE   PRINCIPAL BALANCE
 -----------------    -----------------  -----------------   -----------------  -----------------   -----------------
<S>                   <C>                <C>                   <C>              <C>                   <C>
Up to and Including                      September 2002        66.54139700%     February 2003...      23.02485131%
May 2002.........     100.00000000%      October 2002          57.73555046      March 2003......      14.47352908
June 2002........     93.27244969        November 2002         48.98133862      April 2003......       5.97202785
July 2002........     84.30947385        December 2002         40.27839438      May 2003
August 2002......     75.39924762        January 2003          31.62635292          and thereafter     0.00000000
</TABLE>



                           PLANNED PRINCIPAL BALANCES
                  AS PERCENTAGES OF ORIGINAL PRINCIPAL BALANCE

                             CLASS A-3 CERTIFICATES

<TABLE>
<CAPTION>
                        PERCENTAGE OF                          PERCENTAGE OF                          PERCENTAGE OF
                          ORIGINAL                               ORIGINAL                               ORIGINAL
 DISTRIBUTION DATE    PRINCIPAL BALANCE  DISTRIBUTION DATE   PRINCIPAL BALANCE  DISTRIBUTION DATE   PRINCIPAL BALANCE
 -----------------    -----------------  -----------------   -----------------  -----------------   -----------------
<S>                     <C>              <C>                   <C>              <C>                   <C>
Up to and Including                      September 2003        65.90174023%     March 2004......      19.65443145%
April 2003.......       100.00000000%    October 2003....      58.08213809      April 2004......      12.10069992
May 2003.........        97.63791448     November 2003         50.30765483      May 2004........       4.59016362
June 2003........        89.63454349     December 2003         42.57796501      June 2004
July 2003........        81.67761265     January 2004....      34.89274525       and thereafter.       0.00000000
August 2003......        73.76678866     February 2004...      27.25167393
</TABLE>




                           PLANNED PRINCIPAL BALANCES
                  AS PERCENTAGES OF ORIGINAL PRINCIPAL BALANCE

                             CLASS A-4 CERTIFICATES

<TABLE>
<CAPTION>
                        PERCENTAGE OF                          PERCENTAGE OF                          PERCENTAGE OF
                          ORIGINAL                               ORIGINAL                               ORIGINAL
 DISTRIBUTION DATE    PRINCIPAL BALANCE  DISTRIBUTION DATE   PRINCIPAL BALANCE  DISTRIBUTION DATE   PRINCIPAL BALANCE
 -----------------    -----------------  -----------------   -----------------  -----------------   -----------------
<S>                     <C>              <C>                   <C>              <C>                   <C>
Up to and Including                      December 2004...      62.90578133%     July 2005.......      24.08716974%
May 2004.........       100.00000000%    January 2005....      57.21108396      August 2005.....      18.98046593
June 2004........        97.76299803     February 2005...      51.54854848      September 2005..      14.01780180
July 2004........        91.87020449     March 2005......      45.91793459      October 2005....       9.19464854
August 2004......        86.01104428     April 2005......      40.31900343      November 2005...       4.50661333
September 2004...        80.18526849     May 2005........      34.75151749      December 2005
October 2004.....        74.39262976     June 2005.......      29.34258238        and thereafter       0.00000000
November 2004....        68.63288224
</TABLE>


                           PLANNED PRINCIPAL BALANCES
                  AS PERCENTAGES OF ORIGINAL PRINCIPAL BALANCE

                             CLASS A-5 CERTIFICATES

<TABLE>
<CAPTION>
                        PERCENTAGE OF                          PERCENTAGE OF                          PERCENTAGE OF
                          ORIGINAL                               ORIGINAL                               ORIGINAL
 DISTRIBUTION DATE    PRINCIPAL BALANCE  DISTRIBUTION DATE   PRINCIPAL BALANCE  DISTRIBUTION DATE   PRINCIPAL BALANCE
 -----------------    -----------------  -----------------   -----------------  -----------------   -----------------
<S>                     <C>              <C>                   <C>              <C>                   <C>
Up to and Including                      November 2002...      62.49987510%     July 2004.......      26.35310255%
April 2001.......       100.00000000%    December 2002...      60.58858926      August 2004.....      24.67239385
May 2001.........        98.18569585     January 2003....      58.68848234      September 2004..      23.00126156
June 2001........        96.32134536     February 2003...      56.79947471      October 2004....      21.33963468
July 2001........        94.40837886     March 2003......      54.92148715      November 2004...      19.68744266
August 2001......        92.44896739     April 2003......      53.05444096      December 2004...      18.04461540
September 2001...        90.44511581     May 2003........      51.19825788      January 2005....      16.41108312
October 2001.....        88.40100917     June 2003.......      49.35286015      February 2005...      14.78677655
November 2001....        86.33692468     July 2003.......      47.51817052      March 2005......      13.17162672
December 2001....        84.28509968     August 2003.....      45.69411205      April 2005......      11.56556510
January 2002.....        82.24544804     Septembver 2003.      43.88060841      May 2005........       9.96852364
February 2002....        80.21788411     October 2003....      42.07758368      June 2005.......       8.41696266
March 2002.......        78.20232269     November 2003...      40.28496234      July 2005.......       6.90943987
April 2002.......        76.19867925     December 2003...      38.50266935      August 2005.....       5.44457443
May 2002.........        74.20686957     January 2004....      36.73063015      September 2005..       4.02102695
June 2002........        72.22681013     February 2004...      34.96877061      October 2005....       2.63749838
July 2002........        70.25841781     March 2004......      33.21701701      November 2005...       1.29272862
August 2002......        68.30160999     April 2004......      31.47529606      December 2005...
September 2002...        66.35630459     May 2004........      29.74353499         and thereafter      0.00000000
October 2002.....        64.42241999     June 2004.......      28.04345899
</TABLE>

                           PLANNED PRINCIPAL BALANCES
                  AS PERCENTAGES OF ORIGINAL PRINCIPAL BALANCE

                             CLASS A-11 CERTIFICATES

<TABLE>
<CAPTION>
                        PERCENTAGE OF                          PERCENTAGE OF                          PERCENTAGE OF
                          ORIGINAL                               ORIGINAL                               ORIGINAL
 DISTRIBUTION DATE    PRINCIPAL BALANCE  DISTRIBUTION DATE   PRINCIPAL BALANCE  DISTRIBUTION DATE   PRINCIPAL BALANCE
 -----------------    -----------------  -----------------   -----------------  -----------------   -----------------
<S>                     <C>              <C>                   <C>              <C>                   <C>
Up to and Including                      May 2002........      28.67281143%     December 2002...      10.37730698%
October 2001.....       100.00000000%    June 2002.......      24.03067088      January 2003....       8.14819894
November 2001....        98.87734916     July 2002.......      21.72145393      February 2003...       5.93211210
December 2001....        87.00210017     August 2002.....      19.42582733      March 2003......       3.72895338
January 2002.....        75.19730628     September 2002..      17.14369481      April 2003......       1.53863050
February 2002....        63.46247170     October 2002....      14.87496056      May 2003........
March 2002.......        51.79710376     November 2002...      12.61952947         and thereafter      0.00000000
April 2002.......        40.20071258
</TABLE>




                          SCHEDULED PRINCIPAL BALANCES
                  AS PERCENTAGES OF ORIGINAL PRINCIPAL BALANCE

                      CLASS A-7 AND CLASS A-10 CERTIFICATES

<TABLE>
<CAPTION>
                        PERCENTAGE OF                          PERCENTAGE OF                          PERCENTAGE OF
                          ORIGINAL                               ORIGINAL                               ORIGINAL
 DISTRIBUTION DATE    PRINCIPAL BALANCE  DISTRIBUTION DATE   PRINCIPAL BALANCE  DISTRIBUTION DATE   PRINCIPAL BALANCE
 -----------------    -----------------  -----------------   -----------------  -----------------   -----------------
<S>                      <C>             <C>                   <C>              <C>                   <C>
June 1999........        99.65563553%    May 2003........      62.55389760%     April 2007......      35.79951304%
July 1999........        99.24525417     June 2003.......      62.13140183      May 2007........      34.82214511
August 1999......        98.76905690     July 2003.......      61.71819107      June 2007.......      33.86618972
September 1999...        98.22718206     August 2003.....      61.31413227      July 2007.......      32.91885629
October 1999.....        97.61983462     September 2003..      60.91909392      August 2007.....      31.98003828
November 1999....        96.94728635     October 2003....      60.53294610      September 2007..      31.04963026
December 1999....        96.20987573     November 2003...      60.15556052      October 2007....      30.12752784
January 2000.....        95.40800789     December 2003...      59.78681042      November 2007...      29.21362768
February 2000....        94.54215442     January 2004....      59.42657051      December 2007...      28.30782753
March 2000.......        93.61285288     February 2004...      59.07471711      January 2008....      27.41002615
April 2000.......        92.62070651     March 2004......      58.73112802      February 2008...      26.52012337
May 2000.........        91.56638350     April 2004......      58.39568249      March 2008......      25.63801998
June 2000........        90.45061638     May 2004........      58.06826127      April 2008......      24.76361781
July 2000........        89.27420127     June 2004.......      57.75800504      May 2008........      23.89681971
August 2000......        88.03799679     July 2004.......      57.45546965      June 2008.......      23.04855275
September 2000...        86.74292325     August 2004.....      57.16054029      July 2008.......      22.20744990
October 2000.....        85.38996136     September 2004..      56.87310355      August 2008.....      21.37342070
November 2000....        83.98020676     October 2004....      56.59304741      September 2008..      20.54637553
December 2000....        82.51475548     November 2004...      56.32026120      October 2008....      19.72622574
January 2001.....        80.99481331     December 2004...      56.05463564      November 2008...      18.91288350
February 2001....        79.42164097     January 2005....      55.79606273      December 2008...      18.10626188
March 2001.......        77.79655975     February 2005...      55.54443586      January 2009....      17.30627478
April 2001.......        76.12092775     March 2005......      55.29964967      February 2009...      16.51283704
May 2001.........        75.55627636     April 2005......      55.06160011      March 2009......      15.72586420
June 2001........        74.97685921     May 2005........      54.83018441      April 2009......      14.94527279
July 2001........        74.38363894     June 2005.......      54.58928047      May 2009........      14.17098007
August 2001......        73.77798364     July 2005.......      54.33226576      June 2009.......      13.40290414
September 2001...        73.16091953     August 2005.....      54.05988140      July 2009.......      12.64096389
October 2001.....        72.53491573     September 2005..      53.77284339      August 2009.....      11.88507903
November 2001....        71.90843327     October 2005....      53.47184353      September 2009..      11.13517003
December 2001....        71.29409654     November 2005...      53.15755006      October 2009....      10.39115824
January 2002.....        70.69173810     December 2005...      52.82133758      November 2009...       9.65296560
February 2002....        70.10119247     January 2006....      51.67005711      December 2009...       8.92051501
March 2002.......        69.52229618     February 2006...      50.52985365      January 2010....       8.19372997
April 2002.......        68.95488771     March 2006......      49.40059562      February 2010...       7.47253480
May 2002.........        68.39880744     April 2006......      48.28215275      March 2010......       6.75685458
June 2002........        67.85389769     May 2006........      47.17439618      April 2010......       6.04661503
July 2002........        67.32000269     June 2006.......      46.09089338      May 2010........       5.34174267
August 2002......        66.79696847     July 2006.......      45.01763812      June 2010.......       4.64216472
September 2002...        66.28464303     August 2006.....      43.95450687      July 2010.......       3.94780908
October 2002.....        65.78287605     September 2006..      42.90137738      August 2010.....       3.25860436
November 2002....        65.29151912     October 2006....      41.85812868      September 2010..       2.57447986
December 2002....        64.81042554     November 2006...      40.82464104      October 2010....       1.89536556
January 2003.....        64.33945046     December 2006...      39.80079593      November 2010...       1.22119211
February 2003....        63.87845069     January 2007....      38.78647609      December 2010...       0.55189085
March 2003.......        63.42728484     February 2007...      37.78156538      January 2011....
April 2003.......        62.98581315     March 2007......      36.78594895         and thereafter      0.00000000
</TABLE>






<PAGE>

                          SCHEDULED PRINCIPAL BALANCES
                  AS PERCENTAGES OF ORIGINAL PRINCIPAL BALANCE

                      CLASS A-8 AND CLASS A-9 CERTIFICATES

<TABLE>
<CAPTION>
                        PERCENTAGE OF                          PERCENTAGE OF                          PERCENTAGE OF
                          ORIGINAL                               ORIGINAL                               ORIGINAL
 DISTRIBUTION DATE    PRINCIPAL BALANCE  DISTRIBUTION DATE   PRINCIPAL BALANCE  DISTRIBUTION DATE   PRINCIPAL BALANCE
 -----------------    -----------------  -----------------   -----------------  -----------------   -----------------
<S>                     <C>              <C>                   <C>              <C>                   <C>
Up to and Including                      March 2011......      71.86594884%     July 2011.......      21.11526088%
December 2010....       100.00000000%    April 2011......      59.04537567      August 2011.....       8.64487121
January 2011.....        97.78061950     May 2011........      46.31425325      September 2011..
February 2011            84.77726241     June 2011.......      33.67130364      and thereafter..       0.00000000
</TABLE>


<PAGE>


            (c)  Notwithstanding  the  foregoing,   on  each  Distribution  Date
occurring on or subsequent to the Cross-Over  Date, the Class A Non-PO Principal
Distribution   Amount  shall  be  distributed  among  the  Classes  of  Class  A
Certificates  (other than the Class A-PO  Certificates)  pro rata in  accordance
with  their  outstanding   Principal  Balances  without  regard  to  either  the
proportions or the priorities set forth in Section 4.01(b).

            (d) (i) For purposes of  determining  whether the Classes of Class B
Certificates are eligible to receive  distributions of principal with respect to
any Distribution Date, the following tests shall apply:

                  (A) if the Current Class B-1 Fractional  Interest is less than
            the  Original  Class  B-1  Fractional  Interest  and the  Class  B-1
            Principal  Balance is greater than zero,  the Class B-2,  Class B-3,
            Class  B-4,  Class  B-5 and  Class  B-6  Certificates  shall  not be
            eligible to receive distributions of principal; or

                  (B) if the Current Class B-2 Fractional  Interest is less than
            the  Original  Class  B-2  Fractional  Interest  and the  Class  B-2
            Principal  Balance is greater than zero,  the Class B-3,  Class B-4,
            Class B-5 and  Class  B-6  Certificates  shall  not be  eligible  to
            receive distributions of principal; or

                  (C) if the Current Class B-3 Fractional  Interest is less than
            the  Original  Class  B-3  Fractional  Interest  and the  Class  B-3
            Principal Balance is greater than zero, the Class B-4, Class B-5 and
            Class  B-6   Certificates   shall  not  be   eligible   to   receive
            distributions of principal; or

                  (D) if the Current Class B-4 Fractional  Interest is less than
            the  Original  Class  B-4  Fractional  Interest  and the  Class  B-4
            Principal  Balance is greater than zero, the Class B-5 and Class B-6
            Certificates  shall not be  eligible  to  receive  distributions  of
            principal; or

                  (E) if the Current Class B-5 Fractional  Interest is less than
            the  Original  Class  B-5  Fractional  Interest  and the  Class  B-5
            Principal  Balance is greater than zero, the Class B-6  Certificates
            shall not be eligible to receive distributions of principal.

            (ii) Notwithstanding the foregoing,  if on any Distribution Date the
aggregate  distributions  to  Holders  of the  Classes  of Class B  Certificates
entitled  to receive  distributions  of  principal  would  reduce the  Principal
Balances   of  the  Classes  of  Class  B   Certificates   entitled  to  receive
distributions of principal below zero,  first the Class B Prepayment  Percentage
of any  affected  Class  of Class B  Certificates  for  such  Distribution  Date
beginning with the affected Class with the lowest  numerical  Class  designation
and then,  if  necessary,  the Class B  Percentage  of such Class of the Class B
Certificates  for such  Distribution  Date shall be  reduced  to the  respective
percentages  necessary to bring the  Principal  Balance of such Class of Class B
Certificates  to  zero.  The  Class B  Prepayment  Percentages  and the  Class B
Percentages of the remaining  Classes of Class B Certificates will be recomputed
substituting  for  the  Subordinated   Prepayment  Percentage  and  Subordinated
Percentage in such  computations  the  difference  between (A) the  Subordinated
Prepayment  Percentage or Subordinated  Percentage,  as the case may be, and (B)
the percentages  determined in accordance with the preceding  sentence necessary
to bring the Principal  Balances of the affected Classes of Class B Certificates
to zero; provided, however, that if the Principal Balances of all the Classes of
Class B Certificates  eligible to receive  distributions  of principal  shall be
reduced to zero on such Distribution Date, the Class B Prepayment Percentage and
the Class B  Percentage  of the Class of Class B  Certificates  with the  lowest
numerical  Class  designation  which would  otherwise be  ineligible  to receive
distributions  of principal  in  accordance  with this  Section  shall equal the
remainder of the Subordinated  Prepayment  Percentage for such Distribution Date
minus the sum of the Class B  Prepayment  Percentages  of the Classes of Class B
Certificates  having  lower  numerical  Class  designations,  if  any,  and  the
remainder of the Subordinated  Percentage for such  Distribution  Date minus the
sum of the Class B  Percentages  of the Classes of Class B  Certificates  having
lower numerical Class designations, if any, respectively. Any entitlement of any
Class of Class B  Certificates  to principal  payments  solely  pursuant to this
clause  (ii) shall not cause  such Class to be  regarded  as being  eligible  to
receive  principal  distributions  for the purpose of applying the definition of
its Class B Percentage or Class B Prepayment Percentage.

            (e)  The  Trustee  shall   establish  and  maintain  the  Upper-Tier
Certificate  Account,  which shall be a separate  trust  account and an Eligible
Account.  On each Distribution  Date other than the Final  Distribution Date (if
such Final  Distribution  Date is in connection with a purchase of the assets of
the Trust Estate by the Seller), the Paying Agent shall, on behalf of the Master
Servicer,  from funds available on deposit in the Payment Account,  (i) deposit,
in  immediately  available  funds,  by wire  transfer  or  otherwise,  into  the
Upper-Tier  Certificate  Account  the  Lower-Tier  Distribution  Amount and (ii)
distribute  to the Class  A-LR  Certificateholder  (other  than as  provided  in
Section 9.01 respecting the final distribution to  Certificateholders)  by check
mailed to such Holder at the address of such Holder appearing in the Certificate
Register,  the Class A  Distribution  Amount  with  respect  to the  Class  A-LR
Certificate and all other amounts  distributable to the Class A-LR  Certificate.
The Trustee may clear and terminate the Upper-Tier  Certificate Account pursuant
to Section 9.01.

            (f) On each Distribution Date other than the Final Distribution Date
(if such Final  Distribution Date is in connection with a purchase of the assets
of the Trust  Estate by the Seller),  the Paying  Agent shall,  on behalf of the
Master Servicer, from funds remitted to it by the Master Servicer, distribute to
each  Certificateholder of record (other than the Class A-LR  Certificateholder)
on the preceding  Record Date (other than as provided in Section 9.01 respecting
the final  distribution to  Certificateholders  or in the last paragraph of this
Section  4.01(f)  respecting  the final  distribution  in  respect of any Class)
either in  immediately  available  funds by wire transfer to the account of such
Certificateholder  at a bank  or  other  entity  having  appropriate  facilities
therefor, if such Certificateholder  holds Certificates having a Denomination at
least equal to that specified in Section  11.23,  and has so notified the Master
Servicer or, if applicable,  the Paying Agent at least seven Business Days prior
to the Distribution  Date or, if such Holder holds  Certificates  having, in the
aggregate,  a Denomination  less than the requisite  minimum  Denomination or if
such Holder  holds the Class A-R  Certificate  or has not so notified the Paying
Agent, by check mailed to such Holder at the address of such Holder appearing in
the Certificate Register, such Holder's share of the Class A Distribution Amount
with respect to each Class of Class A Certificates  and the Class B Distribution
Amount with respect to each such Class of Class B Certificates.

            In the  event  that,  on any  Distribution  Date  prior to the Final
Distribution  Date,  the Principal  Balance of any Class of Class A Certificates
(other  than the  Class  A-6,  Class  A-R or  Class  A-LR  Certificates)  or the
Principal Balance of any Class of Class B Certificates  would be reduced to zero
or, in the case of the Class A-6  Certificates,  the Class A-6  Notional  Amount
would be reduced to zero,  the Master  Servicer  shall,  as soon as  practicable
after the Determination  Date relating to such Distribution  Date, send a notice
to the Trustee. The Trustee will then send a notice to each Certificateholder of
such Class with a copy to the Certificate  Registrar,  specifying that the final
distribution  with respect to such Class will be made on such  Distribution Date
only  upon  the   presentation   and   surrender  of  such   Certificateholder's
Certificates at the office or agency of the Trustee therein specified; provided,
however,   that  the   failure  to  give  such   notice   will  not   entitle  a
Certificateholder  to any interest  beyond the interest  payable with respect to
such Distribution Date in accordance with Section 4.01(a)(i).

            (g) The  Paying  Agent (or if no Paying  Agent is  appointed  by the
Master  Servicer,  the Master  Servicer)  shall withhold or cause to be withheld
such  amounts  as may be  required  by  the  Code  (giving  full  effect  to any
exemptions from withholding and related certifications  required to be furnished
by  Certificateholders  and any  reductions  to  withholding  by  virtue  of any
bilateral tax treaties and any applicable certification required to be furnished
by  Certificateholders  with respect  thereto) from  distributions to be made to
Persons other than U.S. Persons ("Non-U.S.  Persons"). Amounts withheld pursuant
to this  Section  4.01(g)  shall be treated as having  been  distributed  to the
related  Certificateholder for all purposes of this Agreement.  For the purposes
of this  paragraph,  a "U.S.  Person"  is a citizen  or  resident  of the United
States,  a corporation  or  partnership  (unless,  in the case of a partnership,
Treasury  regulations are adopted that provide otherwise),  created or organized
in or under the laws of the United States,  any state thereof or the District of
Columbia,  including  an entity  treated as a  corporation  or  partnership  for
federal income tax purposes,  an estate whose income is subject to United States
federal  income tax  regardless of its source,  or a trust if a court within the
United States is able to exercise primary supervision over the administration of
such trust,  and one or more such U.S. Persons have the authority to control all
substantial  decisions of such trust (or, to the extent  provided in  applicable
Treasury  regulations,  certain trusts in existence on August 20, 1996 which are
eligible to elect to be treated as U.S. Persons).

            SECTION 4.02 ALLOCATION OF REALIZED LOSSES.

            (a) With respect to any Distribution  Date, the principal portion of
Realized  Losses  (other than Debt Service  Reductions,  Excess  Special  Hazard
Losses,  Excess Fraud Losses and Excess Bankruptcy  Losses) will be allocated as
follows:

      first, to the Class B-6 Certificates until the Class B-6 Principal Balance
      has been reduced to zero;

      second,  to the Class  B-5  Certificates  until  the  Class B-5  Principal
      Balance has been reduced to zero;

      third, to the Class B-4 Certificates until the Class B-4 Principal Balance
      has been reduced to zero;

      fourth,  to the Class  B-3  Certificates  until  the  Class B-3  Principal
      Balance has been reduced to zero;

      fifth, to the Class B-2 Certificates until the Class B-2 Principal Balance
      has been reduced to zero;

      sixth, to the Class B-1 Certificates until the Class B-1 Principal Balance
      has been reduced to zero; and

      seventh,  concurrently,  to the Class A Certificates (other than the Class
      A-PO  Certificates)  and Class A-PO  Certificates,  pro rata, based on the
      Non-PO Fraction and the PO Fraction, respectively.

            This  allocation  of Realized  Losses  will be effected  through the
reduction of the applicable Class's Principal Balance.

            (b) With respect to any Distribution  Date, the principal portion of
Excess Special Hazard Losses,  Excess Fraud Losses and Excess  Bankruptcy Losses
occurring  with  respect  to any  Mortgage  Loan  allocable  to the  Class  A-PO
Certificates will equal the product of the amount of any such principal loss and
the PO Fraction for such  Mortgage  Loan.  The  principal  portion of any Excess
Special  Hazard  Losses,  Excess  Fraud  Losses  and  Excess  Bankruptcy  Losses
remaining after allocation to the Class A-PO Certificates in accordance with the
preceding  sentence  shall be allocated pro rata among the Class A  Certificates
(other than the Class A-PO  Certificates) and Class B Certificates  based on the
Class  A  Non-PO   Principal   Balance  and  the  Class  B  Principal   Balance,
respectively.  Any such  loss  allocated  to the Class A  Certificates  shall be
allocated on the subsequent  Determination Date among the outstanding Classes of
Class A Certificates (other than the Class A-PO Certificates) in accordance with
the  Class A Loss  Percentages  as of such  Determination  Date.  Any such  loss
allocated  to the Class B  Certificates  shall be  allocated  pro rata among the
outstanding Classes of Class B Certificates based on their Principal Balances.

            (c) Any Realized Losses allocated to a Class of Class A Certificates
or Class B Certificates  pursuant to Section 4.02(a) or Section 4.02(b) shall be
allocated  among  the  Certificates  of such  Class  based on  their  Percentage
Interests.

            (d) In the event that there is a Recovery of an amount in respect of
principal of a Mortgage Loan which had  previously  been allocated as a Realized
Loss  to any  Classes  of  Class  A  Certificates  or any  Classes  of  Class  B
Certificates,  each outstanding Class to which such Realized Loss had previously
been  allocated  shall be entitled to its share (with  respect to the Class A-PO
Certificates,  based on the PO Fraction of such  Mortgage Loan and, with respect
to the Class A Certificates (other than the Class A-PO Certificates) and Class B
Certificates,  based on their  pro rata  share of the  Non-PO  Fraction  of such
Mortgage  Loan)  of  such  Recovery  up to the  amount  of  such  Realized  Loss
previously  allocated  to such  Class  on the  Distribution  Date  in the  month
following  the month in which such  recovery  is  received.  When the  Principal
Balance of a Class of  Certificates  has been reduced to zero,  such Class shall
not be entitled to any share of such  Recovery.  In the event that the amount of
such Recovery exceeds the amount of such Recovery  allocated to each outstanding
Class in accordance with the preceding provisions,  each outstanding Class shall
be entitled to its pro rata share (determined as described above) of such excess
up to the amount of any unrecovered  Realized Loss previously  allocated to such
Class.  Notwithstanding the foregoing  provisions,  but subject to the following
proviso,  if such Recovery  occurs within two years of the  realization  of such
loss and (i) is the  result  of an  event  that  would  have  given  rise to the
repurchase of the related  Mortgage Loan by the Seller  pursuant to Section 2.02
or 2.03, or (ii) represents in whole or part funds which the applicable Servicer
had  received  in  respect  of a  Liquidated  Loan  but  failed  to remit to the
Certificate  Account on or prior to the Business Day preceding the  Distribution
Date following the Applicable  Unscheduled Principal Receipt Period in which the
Mortgage  Loan  became  a  Liquidated  Loan,  such  Recovery  may,  at the  sole
discretion of the Master Servicer,  be treated as a repurchase or an Unscheduled
Principal  Receipt with respect to such  Mortgage  Loan, as the case may be, the
Realized  Loss  previously  recognized  may be  reversed  and  treated  for  all
subsequent purposes as if it had never occurred and the Master Servicer may make
such adjustments to interest or principal  distributions on the Certificates and
to the principal balances of the Certificates as the Master Servicer in its good
faith judgment and sole  discretion  deems  necessary or desirable to effectuate
the  reversal  of the  Realized  Loss  and the  treatment  of such  amount  as a
repurchase or as an Unscheduled  Principal Receipt, as the case may be; provided
that such actions do not result in the aggregate  distributions  made in respect
of each Class of Certificates  whose principal  balances were previously reduced
as a result of such Realized Loss being less than such Class would have received
if such Recovery had been  deposited in the  Certificate  Account on or prior to
the Business Day  preceding  the  Distribution  Date  following  the  Applicable
Unscheduled  Principal  Receipt  Period  in which  the  Mortgage  Loan  became a
Liquidated Loan.

            (e) The interest  portion of Excess Special  Hazard  Losses,  Excess
Fraud Losses and Excess  Bankruptcy  Losses  shall be allocated  between (i) the
Class A Certificates  and (ii) the Class B  Certificates,  pro rata based on the
Class A Interest  Accrual Amount and the Class B Interest Accrual Amount for the
related  Distribution  Date,  without  regard to any reduction  pursuant to this
sentence. Any such loss allocated to the Class A Certificates shall be allocated
among the  outstanding  Classes of Class A  Certificates  based on their Class A
Interest  Percentages.  Any such loss allocated to the Class B Certificates will
be allocated  among the  outstanding  Classes of Class B  Certificates  based on
their Class B Interest  Percentages.  In  addition,  after the Class B Principal
Balance has been reduced to zero, the interest portion of Realized Losses (other
than Excess  Special Hazard  Losses,  Excess Fraud Losses and Excess  Bankruptcy
Losses) will be allocated among the outstanding  Classes of Class A Certificates
based on their Class A Interest Percentages.

            (f) Realized  Losses  allocated in accordance with this Section 4.02
will be allocated on the  Determination  Date in the second month  following the
month in which such loss was incurred with respect to the preceding Distribution
Date.

            (g) With respect to any Distribution  Date, the principal portion of
Realized  Losses and recoveries  attributable to previously  allocated  Realized
Losses  allocated  pursuant  to this  Section  4.02  will be  allocated  to each
Uncertificated Lower-Tier Interest in an amount equal to the amount allocated to
its respective Corresponding Upper-Tier Class or Classes as provided above.

            (h) With respect to any  Distribution  Date, the interest portion of
Realized  Losses  allocated  pursuant to this  Section 4.02 will be allocated to
each  Uncertificated  Lower-Tier  Interest in the same relative  proportions  as
interest is allocated to such Uncertificated Lower-Tier Interest.

            SECTION 4.03 PAYING AGENT.

            (a) The  Master  Servicer  hereby  appoints  the  Trustee as initial
Paying  Agent to make  distributions  to  Certificateholders  and to  forward to
Certificateholders the periodic statements and the annual statements required by
Section 4.04 as agent of the Master Servicer.

            The Master  Servicer may, at any time,  remove or replace the Paying
Agent.

            The Master  Servicer  shall  cause any Paying  Agent that 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 shall:

            (i) hold all  amounts  remitted  to it by the  Master  Servicer  for
      distribution   to   Certificateholders   in  trust  for  the   benefit  of
      Certificateholders    until    such    amounts    are    distributed    to
      Certificateholders or otherwise disposed of as herein provided;

            (ii) give the Trustee  notice of any default by the Master  Servicer
      in remitting any required amount; and

            (iii) at any time during the  continuance of any such default,  upon
      the  written  request of the  Trustee,  forthwith  pay to the  Trustee all
      amounts held in trust by such Paying Agent.

            (b) The Paying Agent shall establish and maintain a Payment Account,
which shall be a separate  trust account and an Eligible  Account,  in which the
Master  Servicer  shall  cause to be  deposited  from  funds in the  Certificate
Account  or,  to the  extent  required  hereunder,  from its own funds (i) at or
before  10:00  a.m.,   New  York  time,  on  the  Business  Day  preceding  each
Distribution Date, by wire transfer of immediately available funds, any Periodic
Advance for such  Distribution  Date,  pursuant  to Section  3.03 and (ii) at or
before  10:00  a.m.,   New  York  time,  on  the  Business  Day  preceding  each
Distribution  Date,  by wire transfer of  immediately  available  funds,  (a) an
amount equal to the Pool Distribution  Amount, (b) Net Foreclosure  Profits,  if
any, with respect to such  Distribution  Date and (c) the amount of any recovery
in respect of a Realized Loss. The Master Servicer may cause the Paying Agent to
invest  the  funds  in the  Payment  Account.  Any such  investment  shall be in
Eligible  Investments,  which  shall  mature  not later  than the  Business  Day
preceding the related  Distribution  Date (unless the Eligible  Investments  are
obligations of the Trustee, in which case such Eligible Investments shall mature
not later than the  Distribution  Date),  and shall not be sold or  disposed  of
prior to maturity.  All income and gain realized from any such investment  shall
be for the benefit of the Master Servicer and shall be subject to its withdrawal
or order from time to time. The amount of any losses  incurred in respect of any
such  investments  shall be  deposited  in the  Payment  Account  by the  Master
Servicer  out of its own funds  immediately  as  realized.  The Paying Agent may
withdraw from the Payment  Account any amount  deposited in the Payment  Account
that was not required to be deposited  therein and may clear and  terminate  the
Payment Account pursuant to Section 9.01.

            SECTION 4.04 STATEMENTS TO CERTIFICATEHOLDERS; REPORT TO THE TRUSTEE
AND THE SELLER.

            Concurrently with each distribution pursuant to Section 4.01(f), the
Master  Servicer,  or the Paying Agent  appointed by the Master  Servicer  (upon
receipt of such statement from the Master  Servicer),  shall forward or cause to
be forwarded by mail to each Holder of a Certificate  and the Seller a statement
setting forth:

            (i) the  amount of such  distribution  to  Holders  of each Class of
      Class A Certificates  allocable to principal,  separately  identifying the
      aggregate amount of any Unscheduled Principal Receipts included therein;

            (ii) (a) the amount of such distribution to Holders of each Class of
      Class A Certificates  allocable to interest, (b) the amount of the Current
      Class A Interest  Distribution  Amount  allocated to each Class of Class A
      Certificates,  (c) any Class A Interest  Shortfall  Amounts  arising  with
      respect  to such  Distribution  Date  and  any  remaining  Class A  Unpaid
      Interest  Shortfall with respect to each Class after giving effect to such
      distribution,  (d) the  amount  of any  Non-Supported  Interest  Shortfall
      allocated to each Class of Class A Certificates for such Distribution Date
      and (e) the interest portion of Excess Special Hazard Losses, Excess Fraud
      Losses  and  Excess  Bankruptcy  Losses  allocated  to each Class for such
      Distribution Date;

            (iii) the  amount of such  distribution  to Holders of each Class of
      Class B Certificates  allocable to principal,  separately  identifying the
      aggregate amount of any Unscheduled Principal Receipts included therein;

            (iv) (a) the amount of such distribution to Holders of each Class of
      Class B Certificates  allocable to interest, (b) the amount of the Current
      Class B Interest  Distribution  Amount  allocated to each Class of Class B
      Certificates,  (c) any Class B Interest  Shortfall  Amounts  arising  with
      respect  to such  Distribution  Date  and  any  remaining  Class B  Unpaid
      Interest  Shortfall  with respect to each Class B of Class B  Certificates
      after  giving  effect  to  such  distribution,   (d)  the  amount  of  any
      Non-Supported  Interest  Shortfall  allocated  to each  Class  of  Class B
      Certificates for such  Distribution  Date, and (e) the interest portion of
      Excess Special Hazard  Losses,  Excess Fraud Losses and Excess  Bankruptcy
      Losses   allocated  to  each  Class  of  Class  B  Certificates  for  such
      Distribution Date;

            (v) the amount of any Periodic  Advance by any Servicer,  the Master
      Servicer  or the  Trustee  pursuant to the  Servicing  Agreements  or this
      Agreement;

            (vi) the number of Mortgage  Loans  outstanding  as of the preceding
      Determination Date;

            (vii) the Class A Principal  Balance,  the Principal Balance of each
      Class of Class A  Certificates,  the  Class B  Principal  Balance  and the
      Principal  Balance  of  each  Class  of  Class  B  Certificates  as of the
      following  Determination  Date after giving effect to the distributions of
      principal  made,  and the principal  portion of Realized  Losses,  if any,
      allocated with respect to such Distribution Date;

            (viii) the  Adjusted  Pool  Amount,  the  Adjusted  Pool  Amount (PO
      Portion),  the Pool Scheduled  Principal Balance of the Mortgage Loans for
      such  Distribution Date and the aggregate  Scheduled  Principal Balance of
      the Discount Mortgage Loans for such Distribution Date;

            (ix) the  aggregate  Scheduled  Principal  Balances of the  Mortgage
      Loans  serviced  by  Norwest  Mortgage  and,  collectively,  by the  Other
      Servicers as of such Distribution Date;

            (x) the  Class A  Percentage  for the  following  Distribution  Date
      (without giving effect to Unscheduled  Principal  Receipts  received after
      the  Applicable  Unscheduled  Principal  Receipt  Period  for the  current
      Distribution  Date which are applied by a Servicer  during such Applicable
      Unscheduled Principal Receipt Period);

            (xi)  the  Class  A   Prepayment   Percentage   for  the   following
      Distribution Date (without giving effect to Unscheduled Principal Receipts
      received after the Applicable Unscheduled Principal Receipt Period for the
      current  Distribution  Date which are  applied by a Servicer  during  such
      Applicable Unscheduled Principal Receipt Period);

            (xii) the Class B-1,  Class B-2, Class B-3, Class B-4, Class B-5 and
      Class B-6 Percentages for the following  Distribution Date (without giving
      effect to  Unscheduled  Principal  Receipts  received after the Applicable
      Unscheduled  Principal  Receipt Period for the current  Distribution  Date
      which  are  applied  by a  Servicer  during  such  Applicable  Unscheduled
      Principal Receipt Period);

            (xiii) the Class B-1, Class B-2, Class B-3, Class B-4, Class B-5 and
      Class B-6  Prepayment  Percentages  for the  following  Distribution  Date
      (without giving effect to Unscheduled  Principal  Receipts  received after
      the  Applicable  Unscheduled  Principal  Receipt  Period  for the  current
      Distribution  Date which are applied by a Servicer  during such Applicable
      Unscheduled Principal Receipt Period);

            (xiv) the number and aggregate  principal balances of Mortgage Loans
      delinquent (a) one month, (b) two months and (c) three months or more;

            (xv) the number and  aggregate  principal  balances of the  Mortgage
      Loans in foreclosure as of the preceding Determination Date;

            (xvi) the book value of any real estate acquired through foreclosure
      or grant of a deed in lieu of foreclosure;

            (xvii) the amount of the remaining Special Hazard Loss Amount, Fraud
      Loss Amount and Bankruptcy Loss Amount as of the close of business on such
      Distribution Date;

            (xviii) the  principal  and  interest  portions  of Realized  Losses
      allocated  as of such  Distribution  Date and the amount of such  Realized
      Losses constituting  Excess Special Hazard Losses,  Excess Fraud Losses or
      Excess Bankruptcy Losses;

            (xix) the aggregate  amount of Bankruptcy  Losses  allocated to each
      Class of Class B Certificates in accordance with Section 4.02(a) since the
      Relevant Anniversary;

            (xx) the  amount by which the  Principal  Balance  of each  Class of
      Class B  Certificates  has been  reduced  as a result of  Realized  Losses
      allocated as of such Distribution Date;

            (xxi) the unpaid principal  balance of any Mortgage Loan as to which
      the Servicer of such Mortgage Loan has determined not to foreclose because
      it believes the related  Mortgaged  Property may be  contaminated  with or
      affected by hazardous wastes or hazardous substances;

            (xxii)  the  amount  of the  aggregate  Servicing  Fees  and  Master
      Servicing  Fees paid (and not  previously  reported)  with  respect to the
      related  Distribution Date and the amount by which the aggregate Available
      Master Servicer  Compensation has been reduced by the Prepayment  Interest
      Shortfall for the related Distribution Date;

            (xxiii)  in the case of the  Class A-6  Certificates,  the Class A-6
      Notional Amount, if any;

            (xxiv)  in the  case  of  each  Class  of  LIBOR  Certificates,  the
      applicable Class A Pass-Through Rate;

            (xxv) the Class A-PO Deferred Amount, if any; and

            (xxvi) such other customary information as the Master Servicer deems
      necessary or desirable to enable  Certificateholders  to prepare their tax
      returns;

and shall  deliver a copy of each type of statement  to the  Trustee,  who shall
provide  copies  thereof to  Persons  making  written  request  therefor  at the
Corporate Trust Office.

            In the case of  information  furnished  with  respect  to a Class of
Class A Certificates  pursuant to clauses (i) and (ii) above and with respect to
a Class of Class B  Certificates  pursuant to clauses (iii) and (iv) above,  the
amounts shall be expressed as a dollar amount per Class A or Class B Certificate
(other  than  the  Class  A-R  and  Class  A-LR   Certificates)  with  a  $1,000
Denomination,  and as a dollar amount per Class A-R and Class A-LR  Certificates
with a $100 Denomination.

            Within a  reasonable  period of time after the end of each  calendar
year, the Master  Servicer shall furnish or cause to be furnished to each Person
who at any time  during  the  calendar  year was the Holder of a  Certificate  a
statement  containing the information set forth in clauses (i) and (ii)(a) above
in the case of a Class A  Certificateholder  and the  information  set  forth in
clauses  (iii)  and  (iv)(a)  above in the  case of a Class B  Certificateholder
aggregated  for such calendar year or applicable  portion  thereof  during which
such Person was a  Certificateholder.  Such  obligation  of the Master  Servicer
shall  be  deemed  to have  been  satisfied  to the  extent  that  substantially
comparable  information shall be provided by the Master Servicer pursuant to any
requirements of the Code from time to time in force.

            Prior to the close of business on the third  Business Day  preceding
each  Distribution  Date,  the Master  Servicer shall furnish a statement to the
Trustee,  any Paying Agent and the Seller (the  information in such statement to
be made  available  to  Certificateholders  by the  Master  Servicer  on written
request)  setting  forth the Class A  Distribution  Amount with  respect to each
Class of Class A Certificates  and the Class B Distribution  Amount with respect
to each Class of Class B Certificates.  The determination by the Master Servicer
of such amounts shall, in the absence of obvious error, be presumptively  deemed
to be correct for all  purposes  hereunder  and the Trustee and the Paying Agent
shall be protected in relying  upon the same  without any  independent  check or
verification.

            In addition to the reports  required  pursuant to this Section 4.04,
the Master  Servicer  shall make  available upon request to each Holder and each
proposed  transferee  of a  Class  A-PO,  Class  B-4,  Class  B-5 or  Class  B-6
Certificate  such additional  information,  if any, as may be required to permit
the proposed transfer to be effected pursuant to Rule 144A.

            SECTION 4.05 REPORTS TO MORTGAGORS AND THE INTERNAL REVENUE SERVICE.

            The Master  Servicer shall, in each year beginning after the Cut-Off
Date,  make the  reports  of  foreclosures  and  abandonments  of any  Mortgaged
Property  as  required  by Code  Section  6050J.  In  order to  facilitate  this
reporting process,  the Master Servicer shall request that each Servicer,  on or
before January 15th of each year, shall provide to the Internal Revenue Service,
with copies to the Master Servicer,  reports relating to each instance occurring
during the previous  calendar  year in which such  Servicer (i) on behalf of the
Trustee  acquires an interest in a Mortgaged  Property  through  foreclosure  or
other comparable  conversion in full or partial  satisfaction of a Mortgage Loan
serviced by such Servicer,  or (ii) knows or has reason to know that a Mortgaged
Property has been  abandoned.  Reports from the  Servicers  shall be in form and
substance sufficient to meet the reporting  requirements imposed by Code Section
6050J.  In  addition,  each  Servicer  shall  provide the Master  Servicer  with
sufficient  information  to allow the Master  Servicer  to, for each year ending
after the  Cut-Off  Date,  provide,  or cause to be  provided,  to the  Internal
Revenue  Service and the Mortgagors  such  information as is required under Code
Sections 6050H (regarding payment of interest) and 6050P (regarding cancellation
of indebtedness).

            SECTION   4.06   CALCULATION   OF   AMOUNTS;   BINDING   EFFECT   OF
INTERPRETATIONS AND ACTIONS OF MASTER SERVICER.

            The Master Servicer will compute the amount of all  distributions to
be made on the Certificates and all losses to be allocated to the  Certificates.
In  the  event  that  the  Master  Servicer  concludes  that  any  ambiguity  or
uncertainty exists in any provisions of this Agreement relating to distributions
to be made on the Certificates or the allocation of losses to the  Certificates,
the  interpretation  of such  provisions  and any  actions  taken by the  Master
Servicer in good faith to implement  such  interpretation  shall be binding upon
Certificateholders.

            SECTION 4.07 DETERMINATION OF LIBOR.

            On each Rate  Determination  Date, the Trustee shall determine LIBOR
for the Distribution  Date occurring in the succeeding month on the basis of the
British Bankers'  Association  ("BBA") "Interest  Settlement Rate" for one-month
deposits in U.S.  dollars as found on Telerate page 3750 as of 11:00 A.M. London
time on such Rate Determination Date. As used herein, "Telerate page 3750" means
the display designated as page 3750 on the Dow Jones Telerate Service.

            If on any Rate Determination Date the Trustee is unable to determine
LIBOR on the basis of the method set forth in the preceding paragraph, LIBOR for
the Distribution Date in the succeeding month will be whichever is higher of (x)
LIBOR as determined on the previous Rate  Determination  Date or (y) the Reserve
Interest Rate. The "Reserve  Interest Rate" will be the rate per annum which the
Trustee  determines  to  be  either  (A)  the  arithmetic  mean  (rounding  such
arithmetic  mean upwards if necessary to the nearest whole multiple of 1/16%) of
the one-month  Eurodollar lending rates that the Reference Banks are quoting, on
the relevant Rate  Determination  Date, to the  principal  London  offices of at
least two leading banks in the London  interbank market or (b) in the event that
the  Trustee  can  determine  no such  arithmetic  mean,  the  lowest  one-month
Eurodollar  lending  rate  that the  Reference  Banks are  quoting  on such Rate
Determination Date to leading European banks.

            If on any Rate  Determination  Date the Trustee is  required  but is
unable to  determine  the Reserve  Interest  Rate in the manner  provided in the
preceding  paragraph,  LIBOR for the  Distribution  Date in the succeeding month
will be LIBOR as determined on the previous Rate Determination  Date, or, in the
case of the first Rate Determination Date, 4.940%.

            The  establishment  of  LIBOR  by  the  Trustee  and  the  Trustee's
subsequent  calculation of the rates of interest applicable to each of the LIBOR
Certificates in the absence of manifest error, will be final and binding.  After
a Rate  Determination  Date,  the Trustee shall provide the Class A Pass-Through
Rates of the LIBOR Certificates for the related  Distribution Date to Beneficial
Owners  or  Holders  of LIBOR  Certificates  who place a  telephone  call to the
Trustee at (704)  383-5272 and make a request  therefor  during  normal  working
hours on any Business Day.


<PAGE>



                                    ARTICLE V

                                THE CERTIFICATES

            SECTION 5.01 THE CERTIFICATES.

            (a) The Class A and  Class B  Certificates  shall be issued  only in
minimum  Denominations  of a Single  Certificate and, except for the Class A-PO,
Class A-R and Class A-LR  Certificates,  integral  multiples of $1,000 in excess
thereof (except, if necessary, for one Certificate of each Class (other than the
Class A-PO,  Class A-R and Class A-LR  Certificates)  that  evidences one Single
Certificate  plus such  additional  principal  portion or notional  amount as is
required  in order for all  Certificates  of such  Class to equal the  aggregate
Original  Principal  Balance of such Class),  and shall be  substantially in the
respective  forms set forth as Exhibits  A-1, A-2, A-3, A-4, A-5, A-6, A-7, A-8,
A-9, A-10, A-11, A-12, A-13, A-14, A-PO, A-R, A-LR, B-1, B-2, B-3, B-4, B-5, B-6
and C (reverse side of Certificates)  hereto. On original issue the Certificates
shall be  executed  and  delivered  by the  Trustee  to or upon the order of the
Seller upon receipt by the Trustee or the Custodian of the  documents  specified
in Section 2.01. The aggregate  principal portion (or notional amount) evidenced
by the  Class  A and  Class  B  Certificates  shall  be the  sum of the  amounts
specifically set forth in the respective Certificates. The Certificates shall be
executed  by manual or  facsimile  signature  on  behalf of the  Trustee  by any
Responsible  Officer  thereof.  Certificates  bearing  the  manual or  facsimile
signatures  of  individuals  who  were at any time the  proper  officers  of the
Trustee shall bind the Trustee  notwithstanding  that such individuals or any of
them have ceased to hold such offices prior to the  authentication  and delivery
of  such  Certificates  or did  not  hold  such  offices  at the  date  of  such
Certificates.  No  Certificate  shall be  entitled  to any  benefit  under  this
Agreement,  or be valid for any  purpose,  unless  manually  countersigned  by a
Responsible  Officer of the Trustee, or unless there appears on such Certificate
a certificate of authentication  executed by the Authenticating  Agent by manual
signature,  and such countersignature or certificate upon a Certificate shall be
conclusive evidence, and the only evidence,  that such Certificate has been duly
authenticated and delivered hereunder.  All Certificates shall be dated the date
of their authentication.

            Until such time as Definitive  Certificates  are issued  pursuant to
Section 5.07, each Book-Entry Certificate shall bear the following legend:

            "Unless   this   certificate   is   presented   by   an   authorized
representative  of  [the  Clearing  Agency]  to  the  Seller  or its  agent  for
registration of transfer,  exchange or payment,  and any  certificate  issued is
registered in the name of [the Clearing  Agency] or such other name as requested
by an authorized representative of [the Clearing Agency] and any payment is made
to [the Clearing Agency], any transfer,  pledge or other use hereof for value or
otherwise by or to any person is wrongful  since the  registered  owner  hereof,
[the Clearing Agency], has an interest herein."

            (b) Upon original  issuance,  the Book-Entry  Certificates  shall be
issued in the form of one or more typewritten  certificates,  to be delivered to
The Depository Trust Company,  the initial Clearing Agency, by, or on behalf of,
the Seller.  Such Certificates  shall initially be registered in the Certificate
Register  in the name of the  nominee of the  initial  Clearing  Agency,  and no
Beneficial  Owner  will  receive  a  definitive  certificate  representing  such
Beneficial Owner's interest in the Book-Entry  Certificates,  except as provided
in Section 5.07.  Unless and until  definitive,  fully  registered  certificates
("Definitive  Certificates")  have been issued to Beneficial  Owners pursuant to
Section 5.07:

            (i) the  provisions  of this Section  5.01(b) shall be in full force
      and effect;

            (ii) the Seller, the Master Servicer,  the Certificate Registrar and
      the Trustee may deal with the Clearing Agency for all purposes  (including
      the making of distributions on the Book-Entry  Certificates and the taking
      of actions by the Holders of Book-Entry  Certificates)  as the  authorized
      representative of the Beneficial Owners;

            (iii) to the extent  that the  provisions  of this  Section  5.01(b)
      conflict with any other  provisions of this  Agreement,  the provisions of
      this Section 5.01(b) shall control;

            (iv) the rights of Beneficial Owners shall be exercised only through
      the Clearing Agency and shall be limited to those  established by law, the
      rules,  regulations  and procedures of the Clearing  Agency and agreements
      between such Beneficial Owners and the Clearing Agency and/or the Clearing
      Agency  Participants,  and all  references in this Agreement to actions by
      Certificateholders  shall,  with respect to the  Book-Entry  Certificates,
      refer to actions taken by the Clearing Agency upon  instructions  from the
      Clearing  Agency  Participants,  and all  references in this  Agreement to
      distributions,  notices,  reports  and  statements  to  Certificateholders
      shall,   with   respect   to  the   Book-Entry   Certificates,   refer  to
      distributions,  notices,  reports and statements to the Clearing Agency or
      its nominee, as registered holder of the Book-Entry  Certificates,  as the
      case may be, for distribution to Beneficial  Owners in accordance with the
      procedures of the Clearing Agency; and

            (v) the initial Clearing Agency will make book-entry transfers among
      the Clearing Agency Participants and receive and transmit distributions of
      principal  and  interest  on  the  Certificates  to  the  Clearing  Agency
      Participants, for distribution by such Clearing Agency Participants to the
      Beneficial Owners or their nominees.

            For  purposes  of any  provision  of  this  Agreement  requiring  or
permitting  actions  with the consent  of, or at the  direction  of,  Holders of
Book-Entry Certificates evidencing specified Voting Interests, such direction or
consent  shall  be  given by  Beneficial  Owners  having  the  requisite  Voting
Interests, acting through the Clearing Agency.

            Unless  and  until  Definitive  Certificates  have  been  issued  to
Beneficial  Owners pursuant to Section 5.07, copies of the reports or statements
referred to in Section 4.04 shall be available to Beneficial Owners upon written
request to the Trustee at the Corporate Trust Office.

            SECTION 5.02 REGISTRATION OF CERTIFICATES.

            (a) The  Trustee  shall  cause to be kept at one of the  offices  or
agencies to be maintained in  accordance  with the  provisions of Section 5.06 a
Certificate Register in which, subject to such reasonable  regulations as it may
prescribe, the Trustee shall provide for the registration of Certificates and of
transfers and exchanges of  Certificates as herein  provided.  The Trustee shall
act as, or shall appoint, a Certificate Registrar for the purpose of registering
Certificates and transfers and exchanges of Certificates as herein provided.

            Upon surrender for  registration  of transfer of any  Certificate at
any office or agency  maintained for such purpose  pursuant to Section 5.06 (and
subject to the provisions of this Section 5.02) the Trustee shall  execute,  and
shall date, authenticate (or cause the Authenticating Agent to authenticate) and
deliver,  in the name of the designated  transferee or transferees,  one or more
new Certificates of a like aggregate  principal  portion or Percentage  Interest
and of the same Class.

            At  the  option  of  the  Certificateholders,  Certificates  may  be
exchanged for other Certificates of authorized Denominations of a like aggregate
principal portion or Percentage Interest and of the same Class upon surrender of
the  Certificates  to be  exchanged  at any such office or agency.  Whenever any
Certificates  are so surrendered  for exchange,  the Trustee shall execute,  and
shall date, authenticate (or cause the Authenticating Agent to authenticate) and
deliver,  the Certificates  which the  Certificateholder  making the exchange is
entitled to receive.  Every Certificate presented or surrendered for transfer or
exchange shall (if so required by the  Certificate  Registrar or the Trustee) be
duly endorsed by, or be accompanied by a written  instrument of transfer in form
satisfactory to the Certificate  Registrar,  duly executed by the Holder thereof
or his attorney duly authorized in writing.

            No service  charge  shall be made for any  transfer  or  exchange of
Certificates,  but the Trustee or the Certificate  Registrar may require payment
of a sum sufficient to cover any tax or governmental  charge that may be imposed
in connection with any transfer or exchange of Certificates.

            All  Certificates  surrendered  for transfer  and exchange  shall be
canceled by the Certificate  Registrar,  the Trustee or the Authenticating Agent
in accordance with their standard procedures.

            (b) No transfer of a Class A-PO,  Class B-4,  Class B-5 or Class B-6
Certificate shall be made unless the registration requirements of the Securities
Act of 1933, as amended,  and any applicable  State securities laws are complied
with, or such transfer is exempt from the registration  requirements  under said
Act and laws.  In the event that a transfer  is to be made in  reliance  upon an
exemption from said Act or laws, (i) unless such transfer is made in reliance on
Rule 144A,  the Trustee or the Seller may, if such transfer is to be made within
three years after the later of (i) the date of the initial sale of  Certificates
or (ii) the last date on which the Seller or any affiliate  thereof was a Holder
of the Certificates proposed to be transferred, require a Class A-PO, Class B-4,
Class B-5 or Class B-6 Certificateholder to deliver a written Opinion of Counsel
acceptable  to and in form and  substance  satisfactory  to the  Trustee and the
Seller,  to the effect that such  transfer may be made pursuant to an exemption,
describing the applicable  exemption and the basis  therefor,  from said Act and
laws or is being made  pursuant to said Act and laws,  which  Opinion of Counsel
shall not be an expense of the Trustee,  the Seller or the Master Servicer,  and
(ii) the Trustee  shall require the  transferee  (other than an affiliate of the
Seller on the  Closing  Date) to  execute  an  investment  letter in the form of
Exhibit J hereto  certifying to the Seller and the Trustee the facts surrounding
such transfer,  which investment  letter shall not be an expense of the Trustee,
the Seller or the Master Servicer.  The Holder of a Class A-PO, Class B-4, Class
B-5 or Class B-6 Certificate  desiring to effect such transfer  shall,  and does
hereby agree to, indemnify the Trustee,  the Seller, the Master Servicer and any
Paying  Agent  acting on behalf of the Trustee  against any  liability  that may
result if the transfer is not so exempt or is not made in  accordance  with such
federal  and  state  laws.  Neither  the  Seller  nor the  Trustee  is  under an
obligation  to  register  the  Class  A-PO,  Class  B-4,  Class B-5 or Class B-6
Certificates under said Act or any other securities law.

            (c) No transfer of a Class A-14,  Class A-PO or Class B  Certificate
shall be made (other  than the  transfer  of the Class A-PO  Certificates  to an
affiliate  of the Seller on the Closing  Date) unless the Trustee and the Seller
shall have received (i) a representation  letter from the transferee in the form
of Exhibit J hereto,  in the case of a Class A-PO, Class B-4, Class B-5 or Class
B-6  Certificate,  or in the form of  Exhibit K  hereto,  in the case of a Class
A-14, Class B-1, Class B-2 or Class B-3  Certificate,  to the effect that either
(a)  such  transferee  is not an  employee  benefit  plan  or  other  retirement
arrangement  subject to Title I of ERISA or Code Section 4975, or a governmental
plan,  as defined in Section  3(32) of ERISA,  subject to any federal,  state or
local law ("Similar Law") which is to a material extent similar to the foregoing
provisions  of ERISA or the Code  (collectively,  a "Plan")  and is not a person
acting on behalf of or using the assets of any such Plan,  which  representation
letter shall not be an expense of the Trustee, the Seller or the Master Servicer
or (b) with  respect to the Class  A-14 or Class B  Certificates  only,  if such
transferee is an insurance company, (A) the source of funds used to purchase the
Class A-14 or Class B Certificate is an "insurance  company general account" (as
such term is defined in Section V(e) of Prohibited  Transaction  Class Exemption
95-60 ("PTE 95-60"),  60 Fed. Reg. 35925 (July 12, 1995)),  (B) there is no Plan
with  respect  to which  the  amount  of such  general  account's  reserves  and
liabilities for the contract(s)  held by or on behalf of such Plan and all other
Plans  maintained  by the same  employer  (or  affiliate  thereof  as defined in
Section V(a)(1) of PTE 95-60) or by the same employee  organization  exceeds 10%
of the total of all reserves and  liabilities  of such general  account (as such
amounts  are  determined  under  Section  I(a)  of PTE  95-60)  at the  date  of
acquisition  and (C) the  purchase  and  holding  of such  Class A-14 or Class B
Certificates  are covered by Sections I and III of PTE 95-60 or (ii) in the case
of any  such  Class  A-14,  Class  A-PO or  Class B  Certificate  presented  for
registration  in the  name of a Plan,  or a  trustee  of any such  Plan,  (A) an
Opinion of Counsel satisfactory to the Trustee and the Seller to the effect that
the  purchase or holding of such Class A-14,  Class A-PO or Class B  Certificate
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, the Code
or  Similar  Law and will not  subject  the  Trustee,  the  Seller or the Master
Servicer to any  obligation in addition to those  undertaken in this  Agreement,
which Opinion of Counsel  shall not be an expense of the Trustee,  the Seller or
the  Master  Servicer  and  (B)  such  other  opinions  of  counsel,   officer's
certificates  and agreements as the Seller or the Master Servicer may require in
connection with such transfer, which opinions of counsel, officers' certificates
and agreements shall not be an expense of the Trustee,  the Seller or the Master
Servicer.  The Class  A-14,  Class  A-PO and Class B  Certificates  shall bear a
legend referring to the foregoing restrictions contained in this paragraph.

            (d) No legal or  beneficial  interest  in all or any  portion of the
Class A-R or Class A-LR Certificate may be transferred directly or indirectly to
a "disqualified  organization"  within the meaning of Code Section 860E(e)(5) or
an agent  of a  disqualified  organization  (including  a  broker,  nominee,  or
middleman), to a Plan or a Person acting on behalf of or investing the assets of
a Plan (such Plan or Person, an "ERISA Prohibited  Holder") or to an individual,
corporation,  partnership  or other person unless such  transferee  (i) is not a
Non-U.S.  Person or (ii) is a Non-U.S.  Person that holds the Class A-R or Class
A-LR  Certificate in connection  with the conduct of a trade or business  within
the United  States and has  furnished  the  transferor  and the Trustee  with an
effective Internal Revenue Service Form 4224 or (iii) is a Non-U.S.  Person that
has delivered to both the  transferor and the Trustee an opinion of a nationally
recognized tax counsel to the effect that the transfer of the Class A-R or Class
A-LR  Certificate to it is in accordance  with the  requirements of the Code and
the regulations  promulgated  thereunder and that such transfer of the Class A-R
or Class  A-LR  Certificate  will not be  disregarded  for  federal  income  tax
purposes (any such person who is not covered by clauses (i), (ii) or (iii) above
being  referred to herein as a  "Non-permitted  Foreign  Holder"),  and any such
purported  transfer  shall be void and have no  effect.  The  Trustee  shall not
execute,  and shall not  authenticate  (or  cause  the  Authenticating  Agent to
authenticate)  and  deliver,  a new  Class  A-R or  Class  A-LR  Certificate  in
connection  with any  such  transfer  to a  disqualified  organization  or agent
thereof (including a broker,  nominee or middleman),  an ERISA Prohibited Holder
or a Non-permitted Foreign Holder, and neither the Certificate Registrar nor the
Trustee shall accept a surrender for transfer or  registration  of transfer,  or
register the transfer  of, the Class A-R or Class A-LR  Certificate,  unless the
transferor shall have provided to the Trustee an affidavit, substantially in the
form attached as Exhibit H hereto, signed by the transferee,  to the effect that
the transferee is not such a disqualified  organization,  an agent  (including a
broker, nominee, or middleman) for any entity as to which the transferee has not
received a substantially  similar  affidavit,  an ERISA  Prohibited  Holder or a
Non-permitted  Foreign Holder,  which affidavit shall contain the consent of the
transferee  to any such  amendments  of this  Agreement  as may be  required  to
further  effectuate the foregoing  restrictions  on transfer of the Class A-R or
Class A-LR Certificate to disqualified  organizations,  ERISA Prohibited Holders
or  Non-permitted  Foreign  Holders.  Such  affidavit  shall  also  contain  the
statement of the transferee  that (i) the transferee has  historically  paid its
debts  as they  have  come  due and  intends  to do so in the  future,  (ii) the
transferee  understands  that it may incur  liabilities  in excess of cash flows
generated by the residual  interest,  (iii) the transferee  intends to pay taxes
associated  with holding the  residual  interest as they become due and (iv) the
transferee  will not  transfer  the Class A-R or Class A-LR  Certificate  to any
Person who does not provide an affidavit  substantially  in the form attached as
Exhibit H hereto.

            The affidavit described in the preceding paragraph,  if not executed
in  connection  with  the  initial  issuance  of the  Class  A-R or  Class  A-LR
Certificate, shall be accompanied by a written statement in the form attached as
Exhibit I hereto, signed by the transferor, to the effect that as of the time of
the transfer,  the transferor  has no actual  knowledge that the transferee is a
disqualified  organization,  ERISA Prohibited  Holder or  Non-permitted  Foreign
Holder,  and has no knowledge or reason to know that the statements  made by the
transferee  with  respect to clauses  (i) and (iii) of the last  sentence of the
preceding  paragraph  are not true.  The Class A-R and Class  A-LR  Certificates
shall bear a legend  referring to the foregoing  restrictions  contained in this
paragraph and the preceding paragraph.

            Upon  notice to the  Master  Servicer  that any legal or  beneficial
interest  in any  portion  of the Class A-R or Class A-LR  Certificate  has been
transferred,  directly or indirectly,  to a disqualified  organization  or agent
thereof  (including a broker,  nominee,  or middleman) in  contravention  of the
foregoing  restrictions,  (i) such transferee  shall be deemed to hold the Class
A-R or Class A-LR Certificate in constructive  trust for the last transferor who
was not a disqualified  organization or agent thereof, and such transferor shall
be  restored  as the  owner of such  Class  A-R or  Class  A-LR  Certificate  as
completely  as if such  transfer had never  occurred,  provided  that the Master
Servicer  may, but is not required to,  recover any  distributions  made to such
transferee with respect to the Class A-R or Class A-LR Certificate, and (ii) the
Master  Servicer  agrees to furnish to the Internal  Revenue  Service and to any
transferor of the Class A-R or Class A-LR  Certificate  or such agent (within 60
days of the  request  therefor  by the  transferor  or agent)  such  information
necessary to the  application of Code Section  860E(e) as may be required by the
Code,  including but not limited to the present  value of the total  anticipated
excess  inclusions  with respect to the Class A-R or Class A-LR  Certificate (or
portion thereof) for periods after such transfer.  At the election of the Master
Servicer,  the cost to the Master  Servicer of  computing  and  furnishing  such
information  may be charged to the  transferor or such agent  referred to above;
however,  the Master  Servicer shall in no event be excused from furnishing such
information.

            SECTION 5.03 MUTILATED, DESTROYED, LOST OR STOLEN CERTIFICATES.

            If (i) any mutilated  Certificate  is  surrendered to the Trustee or
the Authenticating  Agent, or the Trustee or the  Authenticating  Agent receives
evidence  to  its  satisfaction  of  the  destruction,  loss  or  theft  of  any
Certificate,  and (ii) there is delivered  to the Trustee or the  Authenticating
Agent such security or indemnity as may be required by them to hold each of them
harmless,  then,  in the absence of notice to the Trustee or the  Authenticating
Agent that such  Certificate  has been  acquired by a bona fide  purchaser,  the
Trustee shall execute and  authenticate  (or cause the  Authenticating  Agent to
authenticate)  and deliver,  in exchange  for or in lieu of any such  mutilated,
destroyed,  lost or stolen  Certificate,  a new  Certificate  of like  tenor and
principal  portion  or  Percentage  Interest  and of the  same  Class.  Upon the
issuance  of  any  new  Certificate  under  this  Section,  the  Trustee  or the
Certificate  Registrar may require the payment of a sum  sufficient to cover any
tax or other governmental charge that may be imposed in relation thereto and any
other  expense   (including  the  fees  and  expenses  of  the  Trustee  or  the
Authenticating Agent) in connection therewith.  Any duplicate Certificate issued
pursuant to this Section shall constitute complete and indefeasible  evidence of
ownership in the Trust Estate, as if originally issued, whether or not the lost,
stolen, or destroyed Certificate shall be found at any time.

            SECTION 5.04 PERSONS DEEMED OWNERS.

            Prior to the due  presentation of a Certificate for  registration of
transfer,  the  Seller,  the  Master  Servicer,  the  Trustee,  the  Certificate
Registrar and any agent of the Seller,  the Master Servicer,  the Trustee or the
Certificate  Registrar  may treat the  Person in whose name any  Certificate  is
registered  as the  owner  of such  Certificate  for the  purpose  of  receiving
distributions  pursuant to Section 4.01, and for all other purposes  whatsoever,
and  neither the Seller,  the Master  Servicer,  the  Trustee,  the  Certificate
Registrar nor any agent of the Seller,  the Master Servicer,  the Trustee or the
Certificate Registrar shall be affected by notice to the contrary.

            SECTION  5.05  ACCESS  TO  LIST  OF  CERTIFICATEHOLDERS'  NAMES  AND
ADDRESSES.

            (a) If the  Trustee  is not  acting as  Certificate  Registrar,  the
Certificate  Registrar  shall  furnish or cause to be  furnished to the Trustee,
within 15 days after  receipt by the  Certificate  Registrar of a request by the
Trustee in writing, a list, in such form as the Trustee may reasonably  require,
of the names and  addresses  of the  Certificateholders  of each Class as of the
most recent Record Date.

            (b) If five or more  Certificateholders  (hereinafter referred to as
"applicants") apply in writing to the Trustee,  and such application states that
the applicants desire to communicate with other  Certificateholders with respect
to  their  rights  under  this  Agreement  or  under  the  Certificates  and  is
accompanied  by a copy of the  communication  which such  applicants  propose to
transmit,  then the Trustee  shall,  within five  Business  Days  following  the
receipt  of such  application,  afford  such  applicants  access  during  normal
business  hours  to the  most  recent  list  of  Certificateholders  held by the
Trustee. If such a list is as of the date more than 90 days prior to the date of
receipt of such  applicants'  request  and the  Trustee  is not the  Certificate
Registrar,  the Trustee shall promptly request from the Certificate  Registrar a
current  list as  provided  in  paragraph  (a)  hereof,  and shall  afford  such
applicants access to such list promptly upon receipt.

            (c) Every Certificateholder, by receiving and holding a Certificate,
agrees with the Seller, the Master Servicer,  the Certificate  Registrar and the
Trustee that neither the Seller, the Master Servicer,  the Certificate Registrar
nor the Trustee  shall be held  accountable  by reason of the  disclosure of any
such  information  as to the names,  addresses and  Percentage  Interests of the
Certificateholders   hereunder,   regardless  of  the  source  from  which  such
information was delivered.

            SECTION 5.06 MAINTENANCE OF OFFICE OR AGENCY.

            The Trustee will maintain, at its expense, an office or agency where
Certificates  may be surrendered  for  registration  of transfer or exchange and
where notices and demands to or upon the Certificate Registrar in respect of the
Certificates and this Agreement may be served. The Trustee initially  designates
the  Corporate  Trust  Office and the  principal  corporate  trust office of the
Authenticating Agent, if any, as its offices and agencies for said purposes.

            SECTION 5.07 DEFINITIVE CERTIFICATES.

            If (i)(A) the Master  Servicer  advises the Trustee in writing  that
the  Clearing  Agency is no longer  willing or able  properly to  discharge  its
responsibilities as depository with respect to the Book-Entry Certificates,  and
(B) the Master  Servicer  is unable to locate a  qualified  successor,  (ii) the
Master Servicer, at its option, advises the Trustee in writing that it elects to
terminate the book-entry  system through the Clearing Agency, or (iii) after the
occurrence of dismissal or resignation of the Master Servicer, Beneficial Owners
representing  aggregate  Voting  Interests of not less than 51% of the aggregate
Voting Interests of each outstanding Class of Book-Entry Certificates advise the
Trustee through the Clearing Agency and Clearing Agency  Participants in writing
that the  continuation of a book-entry  system through the Clearing Agency is no
longer in the best interests of the Beneficial  Owners, the Trustee shall notify
the Beneficial  Owners,  through the Clearing  Agency,  of the occurrence of any
such event and of the  availability  of  Definitive  Certificates  to Beneficial
Owners requesting the same. Upon surrender to the Trustee by the Clearing Agency
of the Certificates held of record by its nominee, accompanied by reregistration
instructions and directions to execute and  authenticate  new Certificates  from
the Master  Servicer,  the Trustee  shall  execute and  authenticate  Definitive
Certificates  for delivery at its Corporate  Trust Office.  The Master  Servicer
shall arrange for, and will bear all costs of, the printing and issuance of such
Definitive Certificates. Neither the Seller, the Master Servicer nor the Trustee
shall be liable for any delay in delivery of such  instructions  by the Clearing
Agency and may conclusively  rely on, and shall be protected in relying on, such
instructions.

            SECTION 5.08 NOTICES TO CLEARING AGENCY.

            Whenever notice or other  communication to the Holders of Book-Entry
Certificates  is  required  under this  Agreement,  unless and until  Definitive
Certificates  shall have been issued to  Beneficial  Owners  pursuant to Section
5.07,  the  Trustee  shall give all such  notices and  communications  specified
herein to be given to Holders of Book-Entry Certificates to the Clearing Agency.


<PAGE>




                                   ARTICLE VI

                       THE SELLER AND THE MASTER SERVICER

            SECTION 6.01 LIABILITY OF THE SELLER AND THE MASTER SERVICER.

            The  Seller  and  the  Master  Servicer  shall  each  be  liable  in
accordance herewith only to the extent of the obligations  specifically  imposed
by this  Agreement  and  undertaken  hereunder  by the  Seller  and  the  Master
Servicer.

            SECTION  6.02  MERGER OR  CONSOLIDATION  OF THE SELLER OR THE MASTER
SERVICER.

            Subject  to the  following  paragraph,  the  Seller  and the  Master
Servicer each will keep in full effect its existence, rights and franchises as a
corporation  under the laws of the jurisdiction of its  incorporation,  and will
obtain and preserve its qualification to do business as a foreign corporation in
each  jurisdiction  in which  such  qualification  is or shall be  necessary  to
protect the validity and  enforceability of this Agreement,  the Certificates or
any of the  Mortgage  Loans and to  perform  its  respective  duties  under this
Agreement.

            The Seller or the Master Servicer may be merged or consolidated with
or into any Person,  or transfer all or  substantially  all of its assets to any
Person,  in which case any Person  resulting from any merger or consolidation to
which the Seller or Master Servicer shall be a party,  or any Person  succeeding
to the business of the Seller or Master Servicer,  shall be the successor of the
Seller or Master  Servicer  hereunder,  without the  execution  or filing of any
paper or any  further  act on the part of any of the  parties  hereto,  anything
herein to the contrary notwithstanding;  provided, however, that, in the case of
the Master  Servicer,  any such successor or resulting Person shall be qualified
to service mortgage loans for FNMA or FHLMC.

            SECTION  6.03  LIMITATION  ON  LIABILITY  OF THE SELLER,  THE MASTER
SERVICER AND OTHERS.

            Neither the Seller nor the Master Servicer nor any subcontractor nor
any of the  partners,  directors,  officers,  employees or agents of any of them
shall be under any liability to the Trust Estate or the  Certificateholders  and
all such Persons shall be held  harmless for any action taken or for  refraining
from the taking of any action in good faith pursuant to this  Agreement,  or for
errors in judgment; provided, however, that this provision shall not protect any
such Person against any breach of warranties or  representations  made herein or
against  any  liability  which would  otherwise  be imposed by reason of willful
misfeasance,  bad faith or gross  negligence in the  performance of duties or by
reason of reckless  disregard of obligations and duties  hereunder.  The Seller,
the Master Servicer,  any  subcontractor,  and any partner,  director,  officer,
employee  or agent of any of them 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 this 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  hereunder  or by  reason  of  reckless  disregard  of  his  or  its
obligations and duties hereunder. The Seller, the Master Servicer and any of the
directors, officers, employees or agents of either may rely in good faith on any
document of any kind which,  prima facie, is properly  executed and submitted by
any Person respecting any matters arising hereunder.  Neither the Seller nor the
Master Servicer shall be under any obligation to appear in,  prosecute or defend
any legal action  unless such action is related to its  respective  duties under
this  Agreement  and which in its opinion  does not involve it in any expense or
liability;  provided, however, that the Seller or the Master Servicer may in its
discretion  undertake  any such action which it may deem  necessary or desirable
with respect to this  Agreement and the rights and duties of the parties  hereto
and the interests of the Certificateholders  hereunder if the Certificateholders
offer to the  Seller  or the  Master  Servicer,  as the case may be,  reasonable
security or indemnity  against the costs,  expenses and liabilities which may be
incurred therein or thereby. In such event, the legal expenses and costs of such
action  and any  liability  resulting  therefrom  shall be  expenses,  costs and
liabilities of the Trust Estate,  and the Seller or the Master Servicer shall be
entitled to be  reimbursed  therefor out of the  Certificate  Account,  and such
amounts shall,  on the following  Distribution  Date or  Distribution  Dates, be
allocated in reduction of  distributions on the Class A and Class B Certificates
in the same manner as Realized Losses are allocated pursuant to Section 4.02(a).

            SECTION 6.04 RESIGNATION OF THE MASTER SERVICER.

            The Master Servicer shall not resign from the obligations and duties
hereby imposed on it except upon  determination that its duties hereunder are no
longer permissible under applicable law or are in material conflict by reason of
applicable  law  with  any  other   activities   carried  on  by  it.  Any  such
determination  permitting  the  resignation  of the  Master  Servicer  shall  be
evidenced by an Opinion of Counsel to such effect  delivered to the Trustee.  No
such  resignation  shall  become  effective  until the  Trustee  or a  successor
servicer  shall have  assumed the Master  Servicer's  responsibilities,  duties,
liabilities and obligations hereunder.

            SECTION 6.05 COMPENSATION TO THE MASTER SERVICER.

            The Master Servicer shall be entitled to receive a monthly fee equal
to the Master Servicing Fee, as compensation for services rendered by the Master
Servicer under this Agreement.  The Master Servicer also will be entitled to any
late reporting fees paid by a Servicer  pursuant to its Servicing  Agreement and
any  investment  income  on funds  on  deposit  in the  Certificate  Account  as
additional compensation.

            SECTION 6.06 ASSIGNMENT OR DELEGATION OF DUTIES BY MASTER SERVICER.

            The Master  Servicer shall not assign or transfer any of its rights,
benefits or privileges under this Agreement to any other Person,  or delegate to
or subcontract  with, or authorize or appoint any other Person to perform any of
the duties,  covenants or  obligations  to be  performed by the Master  Servicer
without the prior written consent of the Trustee, and any agreement,  instrument
or act  purporting  to  effect  any such  assignment,  transfer,  delegation  or
appointment shall be void.  Notwithstanding  the foregoing,  the Master Servicer
shall have the right  without  the prior  written  consent of the Trustee (i) to
assign its rights and delegate its duties and obligations  hereunder;  provided,
however,  that (a) the  purchaser or  transferee  accepting  such  assignment or
delegation  is  qualified  to  service  mortgage  loans  for FNMA or  FHLMC,  is
satisfactory  to the Trustee,  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 Master  Servicer
hereunder  from and after the date of such  agreement;  and (b) each  applicable
Rating Agency's rating of any Certificates 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; and (ii) to delegate to, subcontract with, authorize, or
appoint an affiliate of the Master Servicer to perform and carry out any duties,
covenants or obligations to be performed and carried out by the Master  Servicer
under this Agreement and hereby agrees so to delegate, subcontract, authorize or
appoint  to an  affiliate  of the  Master  Servicer  any  duties,  covenants  or
obligations to be performed and carried out by the Master Servicer to the extent
that such duties,  covenants or obligations  are to be performed in any state or
states in which the  Master  Servicer  is not  authorized  to do  business  as a
foreign  corporation  but in which the affiliate is so  authorized.  In no case,
however,  shall any  permitted  assignment  and  delegation  relieve  the Master
Servicer of any  liability  to the Trustee or the Seller  under this  Agreement,
incurred  by it prior to the time that the  conditions  contained  in clause (i)
above are met.

            SECTION  6.07  INDEMNIFICATION  OF  TRUSTEE  AND  SELLER  BY  MASTER
SERVICER.

            The Master  Servicer  shall  indemnify and hold harmless the Trustee
and the Seller and any  director,  officer or agent  thereof  against  any loss,
liability or expense,  including reasonable  attorney's fees, arising out of, in
connection  with or  incurred  by reason of  willful  misfeasance,  bad faith or
negligence  in the  performance  of duties of the  Master  Servicer  under  this
Agreement or by reason of reckless disregard of its obligations and duties under
this Agreement. Any payment pursuant to this Section made by the Master Servicer
to the  Trustee or the Seller  shall be from such  entity's  own funds,  without
reimbursement  therefor.  The  provisions of this Section 6.07 shall survive the
termination of this Agreement.

            SECTION  6.08  MASTER  SERVICER   COVENANTS   CONCERNING  YEAR  2000
COMPLIANCE.

            The  Master  Servicer  covenants  that it is  working  to modify its
computer  and other  systems  used in the  performance  of its  duties as master
servicer  for the  Certificates  to operate in a manner such that,  on and after
January 1, 2000, the Master  Servicer can perform its duties in accordance  with
the terms of this Agreement.


<PAGE>




                                   ARTICLE VII

                                     DEFAULT

            SECTION 7.01 EVENTS OF DEFAULT.

            In case one or more of the following Events of Default by the Master
Servicer shall occur and be continuing, that is to say:

            (i) any failure by the Master Servicer (a) to remit any funds to the
      Paying Agent as required by Section 4.03 or (b) to  distribute or cause to
      be distributed to  Certificateholders  any payment  required to be made by
      the Master  Servicer  under the terms of this Agreement  which,  in either
      case,  continues  unremedied for a period of three business days after the
      date upon which written  notice of such failure,  requiring the same to be
      remedied,  shall have been given to the Master  Servicer by the Trustee or
      to the Master  Servicer  and the  Trustee by the  holders of  Certificates
      evidencing  in the  aggregate  not less than 25% of the  aggregate  Voting
      Interest represented by all Certificates; or

            (ii) any failure on the part of the Master  Servicer duly to observe
      or  perform  in  any  material  respect  any  other  of the  covenants  or
      agreements on the part of the Master  Servicer in the  Certificates  or in
      this Agreement  which  continues  unremedied for a period of 60 days after
      the date on which written notice of such failure, requiring the same to be
      remedied,  shall have been given to the Master Servicer by the Trustee, or
      to the Master  Servicer  and the  Trustee by the  holders of  Certificates
      evidencing  in the  aggregate  not less than 25% of the  aggregate  Voting
      Interest represented by all Certificates; or

            (iii)  a  decree  or  order  of a court  or  agency  or  supervisory
      authority  having  jurisdiction  in the premises for the  appointment of a
      trustee,   conservator,   receiver  or  liquidator   in  any   bankruptcy,
      insolvency,  readjustment of debt, marshaling of assets and liabilities or
      similar proceedings,  or for the winding-up or liquidation of its affairs,
      shall have been  entered  against the Master  Servicer  and such decree or
      order shall have remained in force  undischarged and unstayed for a period
      of 60 days; or

            (iv) the  Master  Servicer  shall  consent to the  appointment  of a
      trustee,  conservator,  receiver or liquidator or liquidating committee in
      any bankruptcy, insolvency, readjustment of debt, marshaling of assets and
      liabilities,  voluntary  liquidation or similar proceedings of or relating
      to the Master Servicer,  or of or relating to all or substantially  all of
      its property; or

            (v) the Master  Servicer shall admit in writing its inability to pay
      its debts  generally as they become due, file a petition to take advantage
      of any applicable insolvency,  bankruptcy or reorganization  statute, make
      an  assignment  for the benefit of its  creditors or  voluntarily  suspend
      payment of its obligations;

            (vi) the Master Servicer shall be dissolved, or shall dispose of all
      or  substantially  all of its assets;  or  consolidate  with or merge into
      another entity or shall permit another entity to consolidate or merge into
      it,  such  that the  resulting  entity  does not meet the  criteria  for a
      successor servicer, as specified in Section 6.02 hereof; or

            (vii)  the  Master  Servicer  and any  subservicer  appointed  by it
      becomes ineligible to service for both FNMA and FHLMC, which ineligibility
      continues unremedied for a period of 90 days.

then, and in each and every such case,  subject to applicable law, so long as an
Event of Default shall not have been remedied, either the Trustee or the holders
of  Certificates  evidencing  in the  aggregate  not  less  than  66 2/3% of the
aggregate Voting Interest represented by all Certificates,  by notice in writing
to the Master  Servicer (and to the Trustee if given by the  Certificateholders)
may terminate all of the rights and  obligations  of the Master  Servicer  under
this Agreement and in and to the Mortgage  Loans,  but without  prejudice to any
rights which the Master Servicer may have to the aggregate Master Servicing Fees
due prior to the date of  transfer  of the  Master  Servicer's  responsibilities
hereunder,  reimbursement of expenses to the extent permitted by this Agreement,
Periodic  Advances  and other  advances  of its own funds.  Upon  receipt by the
Master  Servicer of such written  notice,  all authority and power of the Master
Servicer under this Agreement,  whether with respect to the  Certificates or the
Mortgage Loans or otherwise, shall pass to and be vested in the Trustee pursuant
to and under this  Section,  subject to the  provisions  of Section  7.05;  and,
without  limitation,  the Trustee is hereby  authorized and empowered to execute
and deliver, on behalf of the Master Servicer, as attorney-in-fact or otherwise,
any and all documents and other  instruments,  and to do or accomplish all other
acts or things necessary or appropriate to effect the purposes of such notice of
termination,  whether to complete the transfer and  endorsement or assignment of
the Mortgage  Loans and related  documents  or  otherwise.  The Master  Servicer
agrees to cooperate with the Trustee in effecting the  termination of the Master
Servicer's  responsibilities and rights hereunder and shall promptly provide the
Trustee all  documents  and records  reasonably  requested by it to enable it to
assume  the  Master  Servicer's  functions  hereunder  and shall  promptly  also
transfer to the  Trustee  all  amounts  which then have been or should have been
deposited  in the  Certificate  Account  by the  Master  Servicer  or which  are
thereafter received by the Master Servicer with respect to the Mortgage Loans.

            SECTION 7.02 OTHER REMEDIES OF TRUSTEE.

            During  the  continuance  of any Event of  Default,  so long as such
Event of Default shall not have been remedied,  the Trustee,  in addition to the
rights  specified  in Section  7.01,  shall  have the right,  in its own name as
trustee of an express  trust,  to take all actions now or hereafter  existing at
law, in equity or by statute to enforce its rights and  remedies  and to protect
the interests,  and enforce the rights and remedies,  of the  Certificateholders
(including the institution and prosecution of all judicial,  administrative  and
other  proceedings  and the  filing of  proofs  of claim and debt in  connection
therewith).  Except as otherwise expressly provided in this Agreement, no remedy
provided for by this Agreement shall be exclusive of any other remedy,  and each
and every remedy shall be cumulative  and in addition to any other remedy and no
delay or omission to exercise any right or remedy shall impair any such right or
remedy or shall be deemed to be a waiver of any Event of Default.

            SECTION 7.03 DIRECTIONS BY CERTIFICATEHOLDERS  AND DUTIES OF TRUSTEE
DURING EVENT OF DEFAULT.

            During  the  continuance  of  any  Event  of  Default,   Holders  of
Certificates  evidencing  in the  aggregate  not less than 25% of the  aggregate
Voting Interest  represented by all Certificates 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,  under this Agreement;
provided,  however,  that the Trustee shall be under no obligation to pursue any
such  remedy,  or to exercise  any of the rights or powers  vested in it by this
agreement (including, without limitation, (i) the conducting or defending of any
administrative action or litigation hereunder or in relation hereto and (ii) the
terminating  of the Master  Servicer  from its  rights  and  duties as  servicer
hereunder) at the request, order or direction of any of the  Certificateholders,
unless such  Certificateholders  shall have  offered to the  Trustee  reasonable
security or indemnity  against the cost,  expenses and liabilities  which may be
incurred  therein  or  thereby  and,  provided  further,  that,  subject  to the
provisions  of  Section  8.01,  the  Trustee  shall have the right to decline to
follow any such  direction  if the  Trustee,  in  accordance  with an Opinion of
Counsel,  determines  that the action or proceeding so directed may not lawfully
be  taken  or if the  Trustee  in good  faith  determines  that  the  action  or
proceeding  so directed  would  involve it in personal  liability or be unjustly
prejudicial to the nonassenting Certificateholders.

            SECTION 7.04 ACTION UPON CERTAIN FAILURES OF THE MASTER SERVICER AND
UPON EVENT OF DEFAULT.

            In the event that the Trustee shall have knowledge of any failure of
the Master  Servicer  specified in Section 7.01(i) or (ii) which would become an
Event of  Default  upon the Master  Servicer's  failure to remedy the same after
notice, the Trustee or the Trustee may, but need not if the Trustee deems it not
in the  Certificateholders'  best  interest,  give notice  thereof to the Master
Servicer. For all purposes of this Agreement, in the absence of actual knowledge
by a corporate trust officer of the Trustee,  the Trustee shall not be deemed to
have  knowledge  of any failure of the Master  Servicer as  specified in Section
7.01(i) and (ii) or any Event of Default unless  notified  thereof in writing by
the Master Servicer or by a Certificateholder.

            SECTION 7.05 TRUSTEE TO ACT; APPOINTMENT OF SUCCESSOR.

            When the Master Servicer receives notice of termination  pursuant to
Section 7.01 or the Trustee  receives  the  resignation  of the Master  Servicer
evidenced by an Opinion of Counsel  pursuant to Section 6.04,  the Trustee shall
be the  successor  in all  respects to the Master  Servicer  in its  capacity as
master servicer under this Agreement and the  transactions set forth or provided
for  herein  and shall  have the  rights  and  powers  and be subject to all the
responsibilities,  duties and liabilities  relating thereto placed on the Master
Servicer  by the  terms  and  provisions  hereof  and in its  capacity  as  such
successor  shall have the same  limitation  of liability  herein  granted to the
Master  Servicer.  In the event  that the  Trustee is  succeeding  to the Master
Servicer as the Master Servicer, as compensation  therefor, the Trustee shall be
entitled to receive monthly such portion of the Master  Servicing Fee,  together
with  such  other  servicing  compensation  as is  agreed to at such time by the
Trustee and the Master Servicer, but in no event more than 25% thereof until the
date of final cessation of the Master Servicer's servicing activities hereunder.
Notwithstanding  the above, the Trustee may, if it shall be unwilling to so act,
or shall,  if it is unable to so act or to obtain a qualifying  bid as described
below,  appoint, or petition a court of competent  jurisdiction to appoint,  any
housing and home finance  institution,  bank or mortgage  servicing  institution
having a net worth of not less than $10,000,000 and meeting such other standards
for a successor servicer as are set forth herein, as the successor to the Master
Servicer hereunder in the assumption of all or any part of the responsibilities,
duties or liabilities of the Master Servicer hereunder;  provided, however, that
until  such a  successor  master  servicer  is  appointed  and has  assumed  the
responsibilities,  duties and liabilities of the Master Servicer hereunder,  the
Trustee  shall  continue  as the  successor  to the Master  Servicer as provided
above.  The compensation of any successor master servicer so appointed shall not
exceed the  compensation  specified  in Section  6.05  hereof.  In the event the
Trustee is  required  to solicit  bids as  provided  above,  the  Trustee  shall
solicit,   by  public   announcement,   bids  from   housing  and  home  finance
institutions,   banks  and   mortgage   servicing   institutions   meeting   the
qualifications  set forth in the  preceding  sentence  for the  purchase  of the
master  servicing  functions.  Such public  announcement  shall specify that the
successor  master  servicer  shall be  entitled to the full amount of the Master
Servicing Fee as compensation together with the other servicing  compensation in
the form of late reporting fees or otherwise as provided in Section 6.05. Within
30 days after any such public  announcement,  the Trustee  shall  negotiate  and
effect the sale,  transfer and  assignment  of the master  servicing  rights and
responsibilities  hereunder  to  the  qualified  party  submitting  the  highest
qualifying  bid.  The Trustee  shall deduct all costs and expenses of any public
announcement  and of any sale,  transfer and assignment of the servicing  rights
and  responsibilities  hereunder  from any sum  received by the Trustee from the
successor  to the  Master  Servicer  in  respect  of  such  sale,  transfer  and
assignment.  After such  deductions,  the remainder of such sum shall be paid by
the  Trustee  to the Master  Servicer  at the time of such  sale,  transfer  and
assignment to the Master  Servicer's  successor.  The Trustee and such successor
shall take such action, consistent with this Agreement, as shall be necessary to
effectuate any such succession. The Master Servicer agrees to cooperate with the
Trustee and any successor  servicer in effecting the  termination  of the Master
Servicer's  servicing  responsibilities  and rights hereunder and shall promptly
provide  the Trustee or such  successor  master  servicer,  as  applicable,  all
documents  and  records  reasonably  requested  by it to enable it to assume the
Master  Servicer's  function  hereunder and shall  promptly also transfer to the
Trustee or such successor master servicer, as applicable, all amounts which then
have been or should have been deposited in the Certificate Account by the Master
Servicer or which are thereafter received by the Master Servicer with respect to
the Mortgage Loans.  Neither the Trustee nor any other successor master servicer
shall be deemed to be in default  hereunder by reason of any failure to make, or
any delay in making, any distribution hereunder or any portion thereof caused by
(i) the failure of the Master  Servicer to deliver,  or any delay in delivering,
cash, documents or records to it, or (ii) restrictions imposed by any regulatory
authority having jurisdiction over the Master Servicer. Notwithstanding anything
to the contrary contained in Section 7.01 above or this Section 7.05, the Master
Servicer shall retain all of its rights and responsibilities  hereunder,  and no
successor  (including  the Trustee)  shall succeed  thereto,  if the  assumption
thereof by such successor would cause the rating assigned to any Certificates to
be  revoked,  downgraded  or placed  on credit  review  status  (other  than for
possible  upgrading) by either  Rating  Agency and the retention  thereof by the
Master Servicer would avert such revocation, downgrading or review.

            SECTION 7.06 NOTIFICATION TO CERTIFICATEHOLDERS.

            Upon any  termination  of the Master  Servicer or  appointment  of a
successor  master servicer,  in each case as provided herein,  the Trustee shall
give prompt  written notice thereof to  Certificateholders  at their  respective
addresses appearing in the Certificate Register.  The Trustee shall also, within
45 days after the occurrence of any Event of Default known to the Trustee,  give
written  notice  thereof to  Certificateholders  at their  respective  addresses
appearing in the Certificate  Register,  unless such Event of Default shall have
been cured or waived within said 45 day period.


<PAGE>




                                  ARTICLE VIII

                             CONCERNING THE TRUSTEE

            SECTION 8.01 DUTIES OF TRUSTEE.

            The  Trustee,  prior to the  occurrence  of an Event of Default  and
after the curing of all Events of Default which may have occurred, undertakes to
perform such duties and only such duties as are  specifically  set forth in this
Agreement.  In case an Event of Default has occurred (which has not been cured),
the Trustee,  subject to the provisions of Sections 7.01,  7.03,  7.04 and 7.05,
shall exercise such of the rights and powers vested in it by this Agreement, and
use the same  degree of care and  skill in its  exercise  as a prudent  investor
would exercise or use under the  circumstances in the conduct of such investor's
own affairs.

            The  Trustee,   upon  receipt  of  all  resolutions,   certificates,
statements,  opinions, reports, documents, orders or other instruments furnished
to the Trustee,  which are specifically required to be furnished pursuant to any
provision of this Agreement, shall examine them to determine whether they are in
the form required by this Agreement;  provided,  however, that the Trustee shall
not be responsible  for the accuracy or content of any  certificate,  statement,
instrument, report, notice or other document furnished by the Master Servicer or
the Servicers pursuant to Articles III, IV and IX.

            No  provision  of this  Agreement  shall be construed to relieve the
Trustee from liability for its own negligent  action,  its own negligent failure
to act or its own willful misconduct; provided, however, that:

            (i) Prior to the  occurrence  of an Event of  Default  and after the
      curing of all such Events of Default which may have  occurred,  the duties
      and  obligations of the Trustee shall be determined  solely by the express
      provisions of this  Agreement,  the Trustee shall not be liable except for
      the  performance of such duties and  obligations as are  specifically  set
      forth in this Agreement, no implied covenants or obligations shall be read
      into this  Agreement  against the Trustee and, in the absence of bad faith
      on the part of the Trustee,  the Trustee may conclusively  rely, as to the
      truth of the  statements  and the  correctness  of the opinions  expressed
      therein,  upon any certificates or opinions furnished to the Trustee,  and
      conforming to the requirements of this Agreement;

            (ii) The Trustee shall not be personally  liable with respect to any
      action  taken,  suffered  or  omitted  to be taken by it in good  faith in
      accordance with the direction of holders of Certificates which evidence in
      the aggregate not less than 25% of the Voting Interest  represented by all
      Certificates  relating  to 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, under this Agreement; and

            (iii) The Trustee shall not be liable for any error of judgment made
      in good  faith  by any of its  Responsible  Officers,  unless  it shall be
      proved that the Trustee or such Responsible  Officer,  as the case may be,
      was negligent in ascertaining the pertinent facts.

            None of the provisions contained in this Agreement shall require the
Trustee to expend or risk its own funds or otherwise  incur  personal  financial
liability in the  performance of any of its duties  hereunder or in the exercise
of any of its rights or powers if there is reasonable  ground for believing that
repayment of such funds or adequate  indemnity against such risk or liability is
not reasonably assured to it.

            SECTION 8.02 CERTAIN MATTERS AFFECTING THE TRUSTEE.

            Except as otherwise provided in Section 8.01:

            (i) The  Trustee  may  request  and rely and shall be  protected  in
      acting  or  refraining   from  acting  upon  any   resolution,   Officers'
      Certificate,  certificate of auditors or any other certificate, statement,
      instrument,  opinion, report, notice, request,  consent, order, appraisal,
      bond or other paper or  document  believed by it to be genuine and to have
      been signed or  presented by the proper party or parties and the manner of
      obtaining  consents and  evidencing  the  authorization  of the  execution
      thereof shall be subject to such reasonable regulations as the Trustee may
      prescribe;

            (ii) The Trustee may consult with counsel, and any written advice of
      such  counsel  or any  Opinion  of  Counsel  shall  be full  and  complete
      authorization and protection in respect of any action taken or suffered or
      omitted by it hereunder in good faith and in  accordance  with such advice
      or Opinion of Counsel;

            (iii) The  Trustee  shall not be  personally  liable  for any action
      taken,  suffered  or omitted by it in good faith and  believed by it to be
      authorized or within the discretion or rights or powers  conferred upon it
      by this Agreement;

            (iv) Subject to Section 7.04, the Trustee shall not be  accountable,
      shall  have no  liability  and makes no  representation  as to any acts or
      omissions  hereunder of the Master Servicer until such time as the Trustee
      may be required  to act as Master  Servicer  pursuant to Section  7.05 and
      thereupon  only for the acts or  omissions  of the  Trustee  as  successor
      Master Servicer; and

            (v) The Trustee may execute any of the trusts or powers hereunder or
      perform any duties  hereunder  either  directly or by or through agents or
      attorneys.

            SECTION 8.03 TRUSTEE NOT REQUIRED TO MAKE INVESTIGATION.

            Prior to the  occurrence of an Event of Default  hereunder and after
the curing of all Events of Default which may have  occurred,  the Trustee shall
not be bound to make any  investigation  into the facts or matters stated in any
resolution,   certificate,   statement,  instrument,  opinion,  report,  notice,
request, consent, order, appraisal, bond, Mortgage, Mortgage Note or other paper
or document (provided the same appears regular on its face), unless requested in
writing to do so by holders of Certificates evidencing in the aggregate not less
than 51% of the  Voting  Interest  represented  by all  Certificates;  provided,
however,  that if the  payment  within a  reasonable  time to the Trustee of the
costs, expenses or liabilities likely to be incurred by it in the making of such
investigation is, in the opinion of the Trustee,  not reasonably  assured to the
Trustee  by the  security  afforded  to it by the terms of this  Agreement,  the
Trustee may require reasonable  indemnity against such expense or liability as a
condition to so proceeding.  The reasonable  expense of every such investigation
shall be paid by the Master  Servicer or, if paid by the Trustee shall be repaid
by the Master Servicer upon demand.

            SECTION 8.04 TRUSTEE NOT LIABLE FOR CERTIFICATES OR MORTGAGE LOANS.

            The recitals  contained herein and in the  Certificates  (other than
the certificate of  authentication  on the  Certificates)  shall be taken as the
statements of the Seller,  and the Trustee assumes no  responsibility  as to the
correctness  of the  same.  The  Trustee  makes  no any  representation  for the
correctness  of the same.  The  Trustee  makes no any  representation  as to the
validity or  sufficiency  of this  Agreement  or of the  Certificates  or of any
Mortgage Loan or related  document.  Subject to Section 2.04,  the Trustee shall
not be  accountable  for  the use or  application  by the  Seller  of any of the
Certificates  or of  the  proceeds  of  such  Certificates,  or for  the  use or
application of any funds paid to the Master  Servicer in respect of the Mortgage
Loans deposited into the  Certificate  Account by the Master Servicer or, in its
capacity as trustee, for investment of any such amounts.

            SECTION 8.05 TRUSTEE MAY OWN CERTIFICATES.

            The Trustee,  and any agent thereof,  in its individual or any other
capacity,  may become the owner or pledgee of Certificates  with the same rights
it would  have if it were not  Trustee or such  agent and may  transact  banking
and/or trust business with the Seller, the Master Servicer or their Affiliates.

            SECTION 8.06 THE MASTER SERVICER TO PAY FEES AND EXPENSES.

            The Master Servicer  covenants and agrees to pay to the Trustee from
time to  time,  and  the  Trustee  shall  be  entitled  to  receive,  reasonable
compensation  (which  shall not be limited by any  provision of law in regard to
the compensation of a trustee of an express trust) for all services  rendered by
it in the  execution  of the  trusts  hereby  created  and in the  exercise  and
performance  of any of the powers and duties  hereunder  of the  Trustee and the
Master  Servicer  will pay or  reimburse  the  Trustee  upon its request for all
reasonable  expenses,  disbursements  and  advances  incurred  or  made by it in
accordance  with  any  of  the  provisions  of  this  Agreement  (including  the
reasonable compensation and the expenses and disbursements of its counsel and of
all persons not regularly in its employ) except any such expense,  disbursement,
or advance as may arise from its negligence or bad faith.

            SECTION 8.07 ELIGIBILITY REQUIREMENTS.

            The Trustee  hereunder  shall at all times (i) be a  corporation  or
association  having its principal  office in a state and city  acceptable to the
Seller,  organized and doing business under the laws of such state or the United
States of  America,  authorized  under  such laws to  exercise  corporate  trust
powers, having a combined capital and surplus of at least $50,000,000,  or shall
be a member of a bank holding system, the aggregate combined capital and surplus
of which is at least $50,000,000, provided that its 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,  (ii) be subject to  supervision or examination by
federal  or state  authority  and (iii)  have a credit  rating  or be  otherwise
acceptable to the Rating Agencies such that neither of the Rating Agencies would
reduce  their  respective  then  current  ratings of the  Certificates  (or have
provided  such  security  from  time to  time as is  sufficient  to  avoid  such
reduction) as evidenced in writing by each Rating Agency. If such corporation or
association publishes reports of condition at least annually, pursuant to law or
to the requirements of the aforesaid  supervising or examining  authority,  then
for the  purposes  of this  Section  the  combined  capital  and surplus of such
corporation  or  association  shall be deemed  to be its  combined  capital  and
surplus as set forth in its most recent  report of  condition so  published.  In
case at any time the Trustee shall cease to be eligible in  accordance  with the
provisions of this Section,  the Trustee shall resign  immediately in the manner
and with the effect specified in Section 8.08.

            SECTION 8.08 RESIGNATION AND REMOVAL.

            The Trustee may at any time resign and be discharged  from the trust
hereby created by giving  written notice of resignation to the Master  Servicer,
such  resignation to be effective upon the  appointment of a successor  trustee.
Upon receiving such notice of  resignation,  the Master  Servicer shall promptly
appoint a successor  trustee by written  instrument,  in duplicate,  one copy of
which  instrument shall be delivered to the resigning entity and one copy to its
successor.  If no successor  trustee shall have been appointed and have accepted
appointment  within 30 days after the giving of such notice of resignation,  the
resigning  Trustee may  petition  any court of  competent  jurisdiction  for the
appointment of a successor trustee.

            If at any time the Trustee  shall cease to be eligible in accordance
with the  provisions  of  Section  8.07 and shall fail to resign  after  written
request  for its  resignation  by the  Master  Servicer,  or if at any  time the
Trustee shall become incapable of acting, or an order for relief shall have been
entered in any bankruptcy or insolvency  proceeding with respect to such entity,
or a receiver  of such  entity or of its  property  shall be  appointed,  or any
public officer shall take charge or control of the Trustee or of the property or
affairs  of the  Trustee  for  the  purpose  of  rehabilitation,  conversion  or
liquidation,  or the Master  Servicer shall deem it necessary in order to change
the situs of the Trust  Estate for state tax reasons,  then the Master  Servicer
shall remove the Trustee and appoint a successor trustee by written  instrument,
in duplicate,  one copy of which instrument shall be delivered to the Trustee so
removed and one copy to the successor trustee.

            The Holders of  Certificates  evidencing  in the  aggregate not less
than 51% of the Voting Interests  represented by all  Certificates  (except that
any Certificate registered in the name of the Seller, the Master Servicer or any
affiliate  thereof  will not be taken into  account in  determining  whether the
requisite Voting Interests has been obtained) may at any time remove the Trustee
and appoint a successor by written  instrument or  instruments,  in  triplicate,
signed by such holders or their attorneys-in-fact duly authorized,  one complete
set of which instruments shall be delivered to the Master Servicer, one complete
set of which  shall be  delivered  to the entity or  entities so removed and one
complete set of which shall be delivered to the successor so appointed.

            Any  resignation  or removal of the  Trustee  and  appointment  of a
successor  pursuant  to any of the  provisions  of  this  Section  shall  become
effective upon acceptance of appointment by the successor as provided in Section
8.09.

            SECTION 8.09 SUCCESSOR.

            Any  successor  trustee  appointed as provided in Section 8.08 shall
execute,  acknowledge  and deliver to the Master Servicer and to its predecessor
trustee an instrument  accepting such appointment  hereunder,  and thereupon the
resignation or removal of the predecessor  trustee shall become  effective,  and
such  successor,  without any further act,  deed or  reconveyance,  shall become
fully  vested  with  all the  rights,  powers,  duties  and  obligations  of its
predecessor  hereunder,  with like  effect  as if  originally  named as  trustee
herein.  The  predecessor  trustee  shall  deliver  to its  successor  all Owner
Mortgage Loan Files and related  documents and  statements  held by it hereunder
(other than any Owner Mortgage Loan Files at the time held by a Custodian, which
Custodian shall become the agent of any successor  trustee  hereunder),  and the
Seller, the Master Servicer and the predecessor entity shall execute and deliver
such instruments and do such other things as may reasonably be required for more
fully and certainly  vesting and  confirming  in the successor  trustee all such
rights, powers, duties and obligations. No successor shall accept appointment as
provided in this Section  unless at the time of such  acceptance  such successor
shall be eligible under the provisions of Section 8.07

            Upon  acceptance of  appointment  by a successor as provided in this
Section, the Master Servicer shall mail notice of the succession of such trustee
hereunder  to all Holders of  Certificates  at their  addresses  as shown in the
Certificate  Register.  If the Master  Servicer fails to mail such notice within
ten days after acceptance of the successor trustee,  the successor trustee shall
cause such notice to be mailed at the expense of the Master Servicer.

            SECTION 8.10 MERGER OR CONSOLIDATION.

            Any Person into which the Trustee may be merged or converted or with
which it may be  consolidated,  to which it may sell or transfer  its  corporate
trust business and assets as a whole or  substantially  as a whole or any Person
resulting from any merger, sale, transfer,  conversion or consolidation to which
the Trustee shall be a party,  or any Person  succeeding to the business of such
entity, shall be the successor of the Trustee hereunder; provided, however, that
(i) such Person shall be eligible under the provisions of Section 8.07,  without
the  execution  or filing of any paper or any  further act on the part of any of
the parties hereto,  anything herein to the contrary  notwithstanding,  and (ii)
the  Trustee  shall  deliver  an Opinion of Counsel to the Seller and the Master
Servicer to the effect that such merger,  consolidation,  sale or transfer  will
not subject  either the  Upper-Tier  REMIC or the  Lower-Tier  REMIC to federal,
state or local tax or cause either the Upper-Tier  REMIC or the Lower-Tier REMIC
to fail to qualify  as a REMIC,  which  Opinion of Counsel  shall be at the sole
expense of the Trustee.

            SECTION 8.11 AUTHENTICATING AGENT.

            The  Trustee  may appoint an  Authenticating  Agent,  which shall be
authorized  to act on  behalf of the  Trustee  in  authenticating  Certificates.
Wherever   reference  is  made  in  this  Agreement  to  the  authentication  of
Certificates  by the Trustee or the Trustee's  countersignature,  such reference
shall be deemed to  include  authentication  on  behalf  of the  Trustee  by the
Authenticating  Agent and a certificate of authentication  executed on behalf of
the  Trustee  by the  Authenticating  Agent.  The  Authenticating  Agent must be
acceptable  to the  Seller  and the Master  Servicer  and must be a  corporation
organized and doing  business  under the laws of the United States of America or
of any state,  having a  principal  office and place of  business in a state and
city acceptable to the Seller and the Master Servicer, having a combined capital
and surplus of at least  $15,000,000,  authorized  under such laws to do a trust
business  and  subject  to  supervision  or  examination  by  federal  or  state
authorities.

            Any corporation into which the Authenticating Agent may be merged or
converted or with which it may be  consolidated,  or any  corporation  resulting
from any merger,  conversion or consolidation to which the Authenticating  Agent
shall be a party, or any corporation succeeding to the corporate agency business
of the  Authenticating  Agent,  shall be the  Authenticating  Agent  without the
execution  or filing of any paper or any  further act on the part of the Trustee
or the Authenticating Agent.

            The  Authenticating  Agent may at any time resign by giving at least
30 days' advance  written notice of  resignation to the Trustee,  the Seller and
the Master  Servicer.  The Trustee may at any time  terminate  the agency of the
Authenticating  Agent by giving  written  notice  thereof to the  Authenticating
Agent,  the  Seller  and  the  Master  Servicer.  Upon  receiving  a  notice  of
resignation  or  upon  such  a   termination,   or  in  case  at  any  time  the
Authenticating  Agent  shall  cease  to  be  eligible  in  accordance  with  the
provisions of this Section 8.11, the Trustee  promptly shall appoint a successor
Authenticating  Agent,  which shall be  acceptable to the Master  Servicer,  and
shall give  written  notice of such  appointment  to the Seller,  and shall mail
notice  of  such   appointment   to  all   Certificateholders.   Any   successor
Authenticating  Agent upon acceptance of its appointment  hereunder shall become
vested  with  all  the  rights,  powers,  duties  and  responsibilities  of  its
predecessor hereunder, with like effect as if originally named as Authenticating
Agent  herein.  No  successor  Authenticating  Agent shall be  appointed  unless
eligible under the provisions of this Section 8.11.

            The  Authenticating  Agent shall have no responsibility or liability
for any  action  taken  by it as  such  at the  direction  of the  Trustee.  Any
reasonable compensation paid to the Authenticating Agent shall be a reimbursable
expense under Section 8.06.

            SECTION 8.12 SEPARATE TRUSTEES AND CO-TRUSTEES.

            The Trustee shall have the power from time to time to appoint one or
more  persons or  corporations  to act either as  co-trustees  jointly  with the
Trustee,  or as  separate  trustees,  for  the  purpose  of  holding  title  to,
foreclosing or otherwise taking action with respect to any Mortgage Loan outside
the state where the  Trustee has its  principal  place of  business,  where such
separate  trustee or  co-trustee  is necessary  or advisable  (or the Trustee is
advised by the Master  Servicer  that such  separate  trustee or  co-trustee  is
necessary  or  advisable)  under  the laws of any  state  in  which a  Mortgaged
Property  is located or for the  purpose of  otherwise  conforming  to any legal
requirement, restriction or condition in any state in which a Mortgaged Property
is located or in any state in which any portion of the Trust  Estate is located.
The Master Servicer shall advise the Trustee when, in its good faith opinion,  a
separate  trustee or  co-trustee  is necessary or  advisable as  aforesaid.  The
separate  trustees or co-trustees so appointed shall be trustees for the benefit
of all of the Certificateholders and shall have such powers, rights and remedies
as shall be specified in the instrument of appointment;  provided, however, that
no such  appointment  shall, or shall be deemed to,  constitute the appointee an
agent of the Trustee.  The Seller and the Master Servicer shall join in any such
appointment,  but such joining shall not be necessary for the  effectiveness  of
such appointment.

            Every separate trustee and co-trustee shall, to the extent permitted
by law, be appointed and act subject to the following provisions and conditions:

            (i) all powers,  duties,  obligations and rights  conferred upon the
      Trustee, in respect of the receipt, custody and payment of moneys shall be
      exercised solely by the Trustee;

            (ii) all other rights,  powers,  duties and obligations conferred or
      imposed upon the Trustee  shall be conferred or imposed upon and exercised
      or  performed  by the  Trustee  and such  separate  trustee or  co-trustee
      jointly,  except to the extent that under any law of any  jurisdiction  in
      which any particular  act or acts are to be performed  (whether as Trustee
      hereunder or as successor to the Master  Servicer  hereunder)  the Trustee
      shall be  incompetent or unqualified to perform such act or acts, in which
      event such rights,  powers, duties and obligations  (including the holding
      of  title  to  the  Trust  Estate  or any  portion  thereof  in  any  such
      jurisdiction) shall be exercised and performed by such separate trustee or
      co-trustee;

            (iii)  no  separate   trustee  or  co-trustee   hereunder  shall  be
      personally  liable by reason of any act or omission of any other  separate
      trustee or co-trustee hereunder; and

            (iv) the Trustee may at any time accept the resignation of or remove
      any separate trustee or co-trustee so appointed by it, if such resignation
      or removal does not violate the other terms of this Agreement.

            Any notice,  request or other  writing given to the Trustee shall be
deemed to have been given to each of the then separate trustees and co-trustees,
as  effectively  as if given to each of them.  Every  instrument  appointing any
separate trustee, co-trustee, or custodian shall refer to this Agreement and the
conditions  of this  Article.  Each separate  trustee and  co-trustee,  upon its
acceptance of the trusts conferred, shall be vested with the estates or property
specified in its instrument of appointment,  either jointly with the Trustee, or
separately,  as may be provided  therein,  subject to all the provisions of this
Agreement,  specifically including every provision of this Agreement relating to
the conduct of,  affecting  the liability  of, or affording  protection  to, the
Trustee. Every such instrument shall be furnished to the Trustee.

            Any separate  trustee,  co-trustee,  or custodian  may, at any time,
constitute  the  Trustee,  its agent or  attorney-in-fact,  with full  power and
authority, to the extent not prohibited by law, to do any lawful act under or in
respect of this Agreement on its behalf and in its name. If any separate trustee
or co-trustee shall die, become incapable of acting,  resign or be removed,  all
of its  estates,  properties,  rights,  remedies and trusts shall vest in and be
exercised by the Trustee to the extent permitted by law, without the appointment
of a new or successor trustee.

            No separate  trustee or  co-trustee  hereunder  shall be required to
meet the  terms  of  eligibility  as a  successor  trustee  under  Section  8.07
hereunder and no notice to  Certificateholders  of the appointment thereof shall
be required under Section 8.09 hereof.

            The  Trustee  agrees to  instruct  its  co-trustees,  if any, to the
extent necessary to fulfill such entity's obligations hereunder.

            The Master  Servicer  shall pay the reasonable  compensation  of the
co-trustees to the extent,  and in accordance  with the standards,  specified in
Section 8.06 hereof.

            SECTION 8.13 APPOINTMENT OF CUSTODIANS.

            The Trustee may at any time on or after the Closing  Date,  with the
consent of the Master Servicer and the Seller, appoint one or more Custodians to
hold all or a portion of the Owner Mortgage Loan Files as agent for the Trustee,
by entering  into a  Custodial  Agreement.  Subject to this  Article  VIII,  the
Trustee  agrees to  comply  with the terms of each  Custodial  Agreement  and to
enforce the terms and provisions  thereof  against the Custodian for the benefit
of the  Certificateholders.  Each  Custodian  shall be a depository  institution
subject to  supervision  by federal  or state  authority,  shall have a combined
capital  and  surplus  of at least  $10,000,000  and  shall be  qualified  to do
business in the  jurisdiction  in which it holds any Owner  Mortgage  Loan File.
Each Custodial Agreement may be amended only as provided in Section 10.01(a).

            SECTION 8.14 TAX MATTERS; COMPLIANCE WITH REMIC PROVISIONS.

            (a) Each of the Trustee and the Master Servicer covenants and agrees
that it shall perform its duties hereunder in a manner consistent with the REMIC
Provisions  and shall not  knowingly  take any action or fail to take any action
that would (i)  affect the  determination  of the Trust  Estate's  status as two
separate  REMICs,  or (ii) cause the  imposition of any federal,  state or local
income,  prohibited  transaction,  contribution  or  other  tax  on  either  the
Upper-Tier REMIC, the Lower-Tier REMIC or the Trust Estate. The Master Servicer,
or,  in the  case  of any tax  return  or  other  action  required  by law to be
performed directly by the Trustee,  the Trustee shall (i) prepare or cause to be
prepared, timely cause to be signed by the Trustee and file or cause to be filed
annual federal and applicable state and local income tax returns for each of the
Upper-Tier  REMIC and the Lower-Tier  REMIC using a calendar year as the taxable
year and the accrual  method of  accounting;  (ii) in the first such federal tax
returns, make, or cause to be made, elections satisfying the requirements of the
REMIC Provisions, on behalf of the Trust Estate, to treat each of the Upper-Tier
REMIC and the Lower-Tier REMIC as a REMIC;  (iii) prepare,  execute and forward,
or cause to be prepared,  executed and forwarded,  to the Certificateholders all
information reports or tax returns required with respect to the Trust Estate, as
and when required to be provided to the Certificateholders,  and to the Internal
Revenue  Service  and  any  other  relevant  governmental  taxing  authority  in
accordance with the REMIC Provisions and any other applicable federal,  state or
local  laws,  including  without  limitation  information  reports  relating  to
"original  issue  discount"  and "market  discount" as defined in the Code based
upon the issue  prices,  prepayment  assumption  and cash flows  provided by the
Seller to the  Trustee  and  calculated  on a  monthly  basis by using the issue
prices of the Certificates;  (iv) make available  information  necessary for the
application  of  any  tax  imposed  on  transferors  of  residual  interests  to
"disqualified  organizations"  (as  defined in the REMIC  Provisions);  (v) file
Forms SS-4 and 8811 and  respond to  inquiries  by  Certificateholders  or their
nominees concerning  information returns,  reports or tax returns; (vi) maintain
(or cause to be  maintained  by the  Servicers)  such  records  relating  to the
Upper-Tier  REMIC and the  Lower-Tier  REMIC,  including  but not limited to the
income, expenses, individual Mortgage Loans (including REO Mortgage Loans, other
assets and  liabilities  of each REMIC,  and the fair market  value and adjusted
basis of the  property  of each REMIC  determined  at such  intervals  as may be
required by the Code,  as may be necessary to prepare the  foregoing  returns or
information reports; (vii) exercise reasonable care not to allow the creation of
any  "interests" in either the Upper-Tier  REMIC or the Lower-Tier  REMIC within
the  meaning  of  Code  Section  860D(a)(2)  other  than  the  interests  in the
Upper-Tier REMIC  represented by 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,  Class A-11,
Class A-12,  Class A-13,  Class A-14,  Class A-PO and Class A-R Certificates and
the  Class  B-1,  Class  B-2,  Class  B-3,  Class  B-4,  Class B-5 and Class B-6
Certificates and the interests in the Lower-Tier REMIC  represented by the Class
A-L1, Class A-L5, Class A-L7, Class A-L8, Class A-L12, Class A-L14, Class A-LPO,
Class A-LUR,  Class B-L1,  Class B-L2,  Class B-L3,  Class B-L4,  Class B-L5 and
Class B-L6 Interests and the Class A-LR Certificate;  (viii) exercise reasonable
care not to allow the  occurrence of any  "prohibited  transactions"  within the
meaning of Code Section 860F(a),  unless the Master Servicer shall have provided
an Opinion of Counsel to the Trustee that such  occurrence  would not (a) result
in a  taxable  gain,  (b)  otherwise  subject  either  the  Upper-Tier  REMIC or
Lower-Tier  REMIC or the Trust  Estate  to tax or (c) cause the Trust  Estate to
fail to qualify as two separate  REMICs;  (ix) exercise  reasonable  care not to
allow either the Upper-Tier REMIC or the Lower-Tier REMIC to receive income from
the  performance  of  services  or from  assets  not  permitted  under the REMIC
Provisions to be held by a REMIC;  (x) pay (on behalf of the Upper-Tier REMIC or
the Lower-Tier REMIC) the amount of any federal income tax,  including,  without
limitation,  prohibited  transaction taxes, taxes on net income from foreclosure
property,  and taxes on certain  contributions to a REMIC after the Startup Day,
imposed on the Upper-Tier  REMIC or Lower-Tier  REMIC,  as the case may be, when
and as the same shall be due and payable (but such obligation  shall not prevent
the Master Servicer or any other appropriate Person from contesting any such tax
in  appropriate  proceedings  and shall not  prevent  the Master  Servicer  from
withholding or depositing  payment of such tax, if permitted by law, pending the
outcome of such proceedings);  and (xi) if required or permitted by the Code and
applicable  law, act as "tax matters  person" for the  Upper-Tier  REMIC and the
Lower-Tier REMIC within the meaning of Treasury Regulations Section 1.860F-4(d),
and the Master Servicer is hereby designated as agent of the Class A-R and Class
A-LR  Certificateholders  for such purpose (or if the Master  Servicer is not so
permitted, the Holders of the Class A-R and Class A-LR Certificates shall be tax
matters persons for the Upper-Tier REMIC and the Lower-Tier REMIC, respectively,
in accordance with the REMIC Provisions).  The Master Servicer shall be entitled
to be  reimbursed  pursuant to Section 3.02 for any taxes paid by it pursuant to
clause (x) of the preceding  sentence,  except to the extent that such taxes are
imposed as a result of the bad faith, willful misfeasance or gross negligence of
the Master Servicer in the performance of its obligations hereunder. The Trustee
shall sign the tax  returns  referred  to in clause (i) of the second  preceding
sentence.

            In order to enable the Master  Servicer or the Trustee,  as the case
may be, to perform its duties as set forth above,  the Seller shall provide,  or
cause to be provided,  to the Master  Servicer within ten days after the Closing
Date all information or data that the Master Servicer  determines to be relevant
for tax  purposes to the  valuations  and offering  prices of the  Certificates,
including,  without  limitation,  the price,  yield,  prepayment  assumption and
projected cash flows of each Class of Certificates and the Mortgage Loans in the
aggregate.  Thereafter,  the Seller shall provide to the Master  Servicer or the
Trustee, as the case may be, promptly upon request therefor, any such additional
information or data that the Master Servicer or the Trustee, as the case may be,
may from time to time request in order to enable the Master  Servicer to perform
its duties as set forth above. The Seller hereby indemnifies the Master Servicer
or the Trustee, as the case may be, for any losses, liabilities, damages, claims
or expenses of the Master  Servicer  or the Trustee  arising  from any errors or
miscalculations  by the Master Servicer or the Trustee  pursuant to this Section
that  result  from any  failure  of the  Seller  to  provide,  or to cause to be
provided, accurate information or data to the Master Servicer or the Trustee, as
the case may be, on a timely basis.  The Master Servicer hereby  indemnifies the
Seller and the Trustee for any losses, liabilities,  damages, claims or expenses
of the  Seller  or the  Trustee  arising  from  the  Master  Servicer's  willful
misfeasance,  bad faith or gross  negligence  in  preparing  any of the federal,
state and local tax returns of either  REMIC as  described  above.  In the event
that the Trustee  prepares  any of the  federal,  state and local tax returns of
either REMIC as described above,  the Trustee hereby  indemnifies the Seller and
the Master Servicer for any losses, liabilities,  damages, claims or expenses of
the  Seller  or  the  Master  Servicer   arising  from  the  Trustee's   willful
misfeasance, bad faith or negligence in connection with such preparation.

            (b) Notwithstanding anything in this Agreement to the contrary, each
of the Master Servicer and the Trustee shall pay from its own funds, without any
right of  reimbursement  therefor,  the  amount of any  costs,  liabilities  and
expenses incurred by the Trust Estate (including,  without  limitation,  any and
all  federal,  state or local  taxes,  including  taxes  imposed on  "prohibited
transactions"  within the meaning of the REMIC  Provisions) if and to the extent
that such costs,  liabilities  and  expenses  arise from a failure of the Master
Servicer or the Trustee to,  respectively,  perform its  obligations  under this
Section 8.14.

            SECTION 8.15 MONTHLY ADVANCES.

            In the event that Norwest  Mortgage fails to make a Periodic Advance
required to be made pursuant to the Norwest Servicing Agreement on or before the
Distribution  Date,  the  Trustee  shall make a Periodic  Advance as required by
Section 3.03 hereof;  provided,  however,  the Trustee  shall not be required to
make such Periodic  Advances if prohibited by law or if it determines  that such
Periodic  Advance  would be a  Nonrecoverable  Advance.  With  respect  to those
Periodic Advances which should have been made by Norwest  Mortgage,  the Trustee
shall be entitled,  pursuant to Section  3.02(a)(i),  (ii) or (v) hereof,  to be
reimbursed from the Certificate Account for Periodic Advances and Nonrecoverable
Advances made by it.

            SECTION 8.16 TRUSTEE COVENANTS CONCERNING YEAR 2000 COMPLIANCE.

            The Trustee  covenants that it is working to modify its computer and
other  systems  used  in the  performance  of its  duties  as  trustee  for  the
Certificates to operate in a manner such that, on and after January 1, 2000, the
Trustee can perform its duties in accordance with the terms of this Agreement.


<PAGE>



                                   ARTICLE IX

                                   TERMINATION

            SECTION 9.01  TERMINATION UPON PURCHASE BY THE SELLER OR LIQUIDATION
OF ALL MORTGAGE LOANS.

            Subject  to   Section   9.02,   the   respective   obligations   and
responsibilities  of the Seller,  the Master  Servicer  and the Trustee  created
hereby (other than the obligation of the Trustee to make certain  payments after
the Final  Distribution  Date to  Certificateholders  and the  obligation of the
Master  Servicer to send certain  notices as  hereinafter  set forth and the tax
reporting  obligations under Sections 4.05 and 8.14 hereof) shall terminate upon
the last action  required  to be taken by the Trustee on the Final  Distribution
Date  pursuant to this Article IX  following  the earlier of (i) the purchase by
the Seller of all  Mortgage  Loans and all  property  acquired in respect of any
Mortgage  Loan  remaining in the Trust Estate at a price equal to the sum of (x)
100% of the unpaid  principal  balance of each Mortgage Loan (other than any REO
Mortgage Loan) as of the Final  Distribution Date, and (y) the fair market value
of the Mortgaged Property related to any REO Mortgage Loan (as determined by the
Master  Servicer  as of the close of  business  on the third  Business  Day next
preceding  the date upon which  notice of any such  termination  is furnished to
Certificateholders  pursuant to the third paragraph of this Section 9.01),  plus
any accrued and unpaid interest  through the last day of the month preceding the
month of such purchase at the applicable  Mortgage  Interest Rate less any Fixed
Retained Yield on each Mortgage Loan  (including any REO Mortgage Loan) and (ii)
the final payment or other  liquidation (or any advance with respect thereto) of
the last Mortgage Loan remaining in the Trust Estate (including for this purpose
the  discharge  of any  Mortgagor  under a  defaulted  Mortgage  Loan on which a
Servicer is not obligated to foreclose due to  environmental  impairment) or the
disposition  of all  property  acquired  upon  foreclosure  or  deed  in lieu of
foreclosure of any Mortgage Loan; provided,  however, that in no event shall the
trust created hereby  continue  beyond the expiration of 21 years from the death
of the  last  survivor  of the  descendants  of  Joseph  P.  Kennedy,  the  late
ambassador of the United  States to the Court of St.  James,  living on the date
hereof.

            The right of the  Seller  to  purchase  all the  assets of the Trust
Estate pursuant to clause (i) of the preceding  paragraph are subject to Section
9.02 and conditioned upon the Pool Scheduled  Principal  Balance of the Mortgage
Loans as of the Final  Distribution Date being less than the amount set forth in
Section 11.22. In the case of any purchase by the Seller pursuant to said clause
(i),  the Seller  shall  provide to the  Trustee the  certification  required by
Section 3.04 and the Trustee and the Custodian shall, promptly following payment
of the  purchase  price,  release to the Seller  the Owner  Mortgage  Loan Files
pertaining to the Mortgage Loans being purchased.

            Notice of any termination,  specifying the Final  Distribution  Date
(which shall be a date that would  otherwise be a Distribution  Date) upon which
the  Certificateholders  may  surrender  their  Certificates  to the Trustee for
payment of the final  distribution and cancellation,  shall be given promptly by
the Master Servicer (if it is exercising its right to purchase the assets of the
Trust   Estate)  or  by  the   Trustee   (in  any  other   case)  by  letter  to
Certificateholders  mailed not earlier than the 15th day of the month  preceding
the month of such final distribution and not later than the twentieth day of the
month of such final distribution specifying (A) the Final Distribution Date upon
which  final  payment of the  Certificates  will be made upon  presentation  and
surrender  of  Certificates  at the  office  or agency  of the  Trustee  therein
designated,  (B) the  amount of any such final  payment  and (C) that the Record
Date otherwise applicable to such Distribution Date is not applicable,  payments
being made (except in the case of any Class A Certificate surrendered on a prior
Distribution Date pursuant to Section 4.01) only upon presentation and surrender
of the Certificates at the office or agency of the Trustee therein specified. If
the  Master  Servicer  is  obligated  to give  notice to  Certificateholders  as
aforesaid,  it  shall  give  such  notice  to the  Trustee  and the  Certificate
Registrar at the time such notice is given to  Certificateholders.  In the event
such notice is given by the Master  Servicer,  the Master Servicer shall deposit
in  the  Certificate  Account  on or  before  the  Final  Distribution  Date  in
immediately available funds an amount equal to the purchase price for the assets
of the Trust  Estate  computed  as above  provided.  Failure  to give  notice of
termination  as described  herein shall not entitle a  Certificateholder  to any
interest beyond the interest payable on the Final Distribution Date.

            Upon  presentation  and surrender of the  Certificates,  the Trustee
shall cause to be distributed to  Certificateholders  on the Final  Distribution
Date in proportion to their respective  Percentage  Interests an amount equal to
(i) as to the Classes of Class A Certificates,  the respective Principal Balance
together  with any related  Class A Unpaid  Interest  Shortfall  and one month's
interest in an amount equal to the respective  Interest Accrual Amount,  (ii) as
to the  Classes  of  Class B  Certificates,  the  respective  Principal  Balance
together  with any related  Class B Unpaid  Interest  Shortfall  and one month's
interest in an amount equal to the respective  Interest Accrual Amount and (iii)
as to the Class A-R and Class A-LR  Certificates,  the  amounts,  if any,  which
remain on deposit in the  Upper-Tier  Certificate  Account  and the  Certificate
Account,  respectively  (other  than  amounts  retained  to meet  claims)  after
application  pursuant  to clauses  (i),  (ii) and (iii) above and payment to the
Master  Servicer of any amounts it is entitled  as  reimbursement  or  otherwise
hereunder. Such amount shall be distributed in respect of interest and principal
in respect of the  Uncertificated  Lower-Tier  Interests  in the same amounts as
distributed  to their  Corresponding  Upper-Tier  Class or Classes in the manner
specified in Section  4.01(a)(ii).  Notwithstanding the foregoing,  if the price
paid pursuant to clause (i) of the first  paragraph of this Section 9.01,  after
reimbursement  to the  Servicers,  the Master  Servicer  and the  Trustee of any
Periodic  Advances,  is  insufficient  to pay in full the  amounts  set forth in
clauses (i), (ii) and (iii) of this paragraph,  then any shortfall in the amount
available for distribution to Certificateholders shall be allocated in reduction
of the amounts  otherwise  distributable on the Final  Distribution  Date in the
same manner as Realized  Losses are allocated  pursuant to Sections  4.02(b) and
4.02(g) hereof.  Such  distribution on the Final  Distribution  Date shall be in
lieu of the distribution otherwise required to be made on such Distribution Date
in respect of each Class of Certificates.

            In the event that all of the Certificateholders  shall not surrender
their  Certificates  for final  payment and  cancellation  within  three  months
following the Final  Distribution Date, the Trustee shall on such date cause all
funds, if any, in the Certificate  Account not distributed in final distribution
to  Certificateholders  to be withdrawn  therefrom and credited to the remaining
Certificateholders by depositing such funds in a separate escrow account for the
benefit of such Certificateholders, and the Master Servicer (if it exercised its
right to purchase  the assets of the Trust  Estate) or the Trustee (in any other
case) shall give a second written notice to the remaining  Certificateholders to
surrender their Certificates for cancellation and receive the final distribution
with respect  thereto.  If within  three months after the second  notice all the
Certificates  shall not have been surrendered for cancellation,  the Trustee may
take appropriate  steps, or may appoint an agent to take  appropriate  steps, to
contact  the  remaining   Certificateholders   concerning   surrender  of  their
Certificates,  and the cost thereof shall be paid out of the funds on deposit in
such escrow account.

            SECTION 9.02 ADDITIONAL TERMINATION REQUIREMENTS.

            In the event of a termination  of the Trust Estate upon the exercise
by the Seller of its  purchase  option as  provided in Section  9.01,  the Trust
Estate  shall  be  terminated  in  accordance  with  the  following   additional
requirements,  unless  the  Trustee  has  received  an Opinion of Counsel to the
effect that any other  manner of  termination  (i) will  constitute a "qualified
liquidation"   of  the  Trust   Estate   within  the  meaning  of  Code  Section
860F(a)(4)(A)  and (ii) will not  subject  either  the  Upper-Tier  REMIC or the
Lower-Tier  REMIC to federal tax or cause the Trust Estate to fail to qualify as
two separate REMICs at any time that any Certificates are outstanding:

            (i) The notice given by the Master Servicer under Section 9.01 shall
      provide  that such notice  constitutes  the adoption of a plan of complete
      liquidation  of the Upper-Tier  REMIC and the  Lower-Tier  REMIC as of the
      date of such  notice  (or,  if  earlier,  the date on which the first such
      notice is mailed to  Certificateholders).  The Master  Servicer shall also
      specify such date in a statement  attached to the final tax returns of the
      Upper-Tier REMIC and the Lower-Tier REMIC; and

            (ii) At or after  the time of  adoption  of such a plan of  complete
liquidation  and at or prior to the Final  Distribution  Date, the Trustee shall
sell  all of the  assets  of the  Trust  Estate  to the  Seller  for cash at the
purchase price  specified in Section 9.01 and shall  distribute such cash within
90 days of such adoption in the manner specified in Section 9.01.


<PAGE>



                                    ARTICLE X

                            MISCELLANEOUS PROVISIONS

            SECTION 10.01 AMENDMENT.

            (a) This  Agreement or any  Custodial  Agreement may be amended from
time to time by the Seller,  the Master  Servicer and the  Trustee,  without the
consent of any of the Certificateholders,  (i) to cure any ambiguity or mistake,
(ii) to correct or  supplement  any  provisions  herein or therein  which may be
inconsistent  with any other  provisions  herein or  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 as two separate REMICs at all
times that any  Certificates are outstanding or to avoid or minimize the risk of
the imposition of any federal tax on the Trust Estate,  the Upper-Tier  REMIC or
the  Lower-Tier  REMIC  pursuant  to the Code that would be a claim  against the
Trust  Estate,  provided that (a) 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 (b) such  action  shall  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  Upper-Tier
Certificate  Account and Lower-Tier  Certificate  Account provided that (a) such
change shall not, as evidenced by an Opinion of Counsel, adversely affect in any
material  respect the  interests  of any  Certificateholder  and (b) such change
shall not  adversely  affect  the  then-current  rating of the  Certificates  as
evidenced  by a letter from each Rating  Agency to such  effect,  (v) to modify,
eliminate  or add to the  provisions  of  Section  5.02 or any other  provisions
hereof  restricting  transfer  of the  Certificates,  provided  that the  Master
Servicer for purposes of Section 5.02 has determined in its sole discretion that
any such  modifications  to this  Agreement  will neither  adversely  affect the
rating on the Certificates nor give rise to a risk that either the Upper-Tier or
Lower-Tier  REMIC  or any of the  Certificateholders  will be  subject  to a tax
caused by a transfer to a  non-permitted  transferee  and (vi) to make any other
provisions with respect to matters or questions  arising under this Agreement or
such Custodial  Agreement  which shall not be materially  inconsistent  with the
provisions of this Agreement,  provided that such action shall not, as evidenced
by an Opinion of Counsel, adversely affect in any material respect the interests
of any Certificateholder.

            This  Agreement or any Custodial  Agreement may also be amended from
time to time by the Seller, the Master Servicer and the Trustee with the consent
of the Holders of Certificates evidencing in the aggregate not less than 66-2/3%
of the aggregate Voting Interests of each Class of Certificates affected thereby
for the  purpose  of adding  any  provisions  to or  changing  in any  manner or
eliminating any of the provisions of this Agreement or such Custodial  Agreement
or of modifying in any manner the rights of the Holders of  Certificates of such
Class; provided,  however, that no such amendment shall (i) reduce in any manner
the amount of, or delay the timing of, payments received on Mortgage Loans which
are required to be  distributed  on any  Certificate  without the consent of the
Holder of such  Certificate,  (ii) adversely  affect in any material respect the
interest of the Holders of  Certificates  of any Class in a manner other than as
described in clause (i) hereof without the consent of Holders of Certificates of
such Class evidencing,  as to such Class, Voting Interests  aggregating not less
than 66-2/3% or (iii) reduce the  aforesaid  percentage of  Certificates  of any
Class the  Holders  of which are  required  to  consent  to any such  amendment,
without  the  consent  of the  Holders  of all  Certificates  of such Class then
outstanding.

            Notwithstanding  any  contrary  provision  of  this  Agreement,  the
Trustee  shall not consent to any  amendment to this  Agreement  unless it shall
have first received an Opinion of Counsel to the effect that such amendment will
not subject either the Upper-Tier  REMIC or the Lower-Tier REMIC to tax or cause
either  the  Upper-Tier  REMIC or the  Lower-Tier  REMIC to fail to qualify as a
REMIC at any time that any Certificates are outstanding.

            Promptly after the execution of any amendment  requiring the consent
of  Certificateholders,  the Trustee shall furnish  written  notification of the
substance of such amendment to each Certificateholder.

            It shall not be  necessary  for the  consent  of  Certificateholders
under this  Section  10.01(a) to approve  the  particular  form of any  proposed
amendment,  but it  shall  be  sufficient  if such  consent  shall  approve  the
substance  thereof.  The manner of obtaining such consents and of evidencing the
authorization of the execution thereof by Certificateholders shall be subject to
such reasonable regulations as the Trustee may prescribe.

            (b)  Notwithstanding  any contrary provision of this Agreement,  the
Master  Servicer may,  from time to time,  amend  Schedule I hereto  without the
consent of any  Certificateholder  or the Trustee;  provided,  however, (i) that
such amendment  does not conflict with any  provisions of the related  Servicing
Agreement, (ii) that the related Servicing Agreement provides for the remittance
of each type of Unscheduled  Principal Receipts received by such Servicer during
the Applicable  Unscheduled  Principal Receipt Period (as so amended) related to
each  Distribution Date to the Master Servicer no later than the 24th day of the
month in which such  Distribution  Date occurs and (iii) that such  amendment is
for the purpose of:

            (i) changing the Applicable Unscheduled Principal Receipt Period for
      Exhibit F-1 Mortgage  Loans to a Mid-Month  Receipt Period with respect to
      all Unscheduled Principal Receipts; or

            (ii) changing the Applicable  Unscheduled  Principal  Receipt Period
      for all Mortgage  Loans  serviced by any  Servicer to a Mid-Month  Receipt
      Period with respect to Full Unscheduled  Principal Receipts and to a Prior
      Month  Receipt  Period  with  respect  to  Partial  Unscheduled  Principal
      Receipts.

            A copy of any  amendment  to  Schedule  I pursuant  to this  Section
10.01(b) shall be promptly forwarded to the Trustee.

            SECTION 10.02 RECORDATION OF AGREEMENT.

            This  Agreement  (or  an  abstract  hereof,  if  acceptable  to  the
applicable recording office) is subject to recordation in all appropriate public
offices  for  real  property  records  in all  the  towns  or  other  comparable
jurisdictions in which any or all of the Mortgaged Properties are situated,  and
in any other  appropriate  public office or elsewhere,  such  recordation  to be
effected by the Master  Servicer and at its expense on direction by the Trustee,
but only upon direction  accompanied by an Opinion of Counsel to the effect that
such  recordation  materially  and  beneficially  affects the  interests  of the
Certificateholders.

            For the purpose of facilitating the recordation of this Agreement as
herein  provided  and  for  other  purposes,  this  Agreement  may  be  executed
simultaneously in any number of counterparts,  each of which  counterparts shall
be deemed to be an original,  and such counterparts shall constitute but one and
the same instrument.

            SECTION 10.03 LIMITATION ON RIGHTS OF CERTIFICATEHOLDERS.

            The death or incapacity of any  Certificateholder  shall not operate
to   terminate   this   Agreement  or  the  Trust   Estate,   nor  entitle  such
Certificateholder's  legal  representatives  or heirs to claim an  accounting or
take any action or  proceeding in any court for a partition or winding up of the
Trust Estate,  nor otherwise  affect the rights,  obligations and liabilities of
the parties hereto or any of them.

            Except as otherwise expressly provided herein, no Certificateholder,
solely by virtue of its status as a  Certificateholder,  shall have any right to
vote or in any manner  otherwise  control the  operation  and  management of the
Trust Estate,  or the  obligations  of the parties  hereto,  nor shall  anything
herein set forth, or contained in the terms of the Certificates, be construed so
as to constitute the Certificateholders from time to time as partners or members
of an association, nor shall any Certificateholder be under any liability to any
third  person by reason of any action  taken by the  parties  to this  Agreement
pursuant to any provision hereof.

            No   Certificateholder,   solely  by   virtue   of  its   status  as
Certificateholder,  shall  have  any  right  by  virtue  or by  availing  of any
provision of this  Agreement  to institute  any suit,  action or  proceeding  in
equity or at law upon or under or with  respect to this  Agreement,  unless such
Holder  previously  shall have given to the Trustee a written  notice of default
and of the continuance  thereof, as hereinbefore  provided,  and unless also the
Holders of  Certificates  evidencing  not less than 25% of the  Voting  Interest
represented by all Certificates shall have made written request upon the Trustee
to  institute  such  action,  suit  or  proceeding  in its own  name as  Trustee
hereunder and shall have offered to the Trustee such reasonable  indemnity as it
may require against the cost, expenses and liabilities to be incurred therein or
thereby, and the Trustee, for 60 days after its receipt of such notice,  request
and offer of  indemnity,  shall have  neglected or refused to institute any such
action,  suit or  proceeding;  it  being  understood  and  intended,  and  being
expressly    covenanted   by   each    Certificateholder    with   every   other
Certificateholder  and the Trustee,  that no one or more Holders of Certificates
shall  have any right in any manner  whatever  by virtue or by  availing  of any
provision of this  Agreement to affect,  disturb or prejudice  the rights of the
Holders  of any  other of such  Certificates,  or to  obtain  or seek to  obtain
priority over or  preference  to any other such Holder,  or to enforce any right
under this  Agreement,  except in the manner herein provided and for the benefit
of all Certificateholders.  For the protection and enforcement of the provisions
of this  Section,  each and every  Certificateholder  and the  Trustee  shall be
entitled to such relief as can be given either at law or in equity.

            SECTION 10.04 GOVERNING LAW; JURISDICTION.

            This Agreement shall be construed in accordance with the laws of the
State of New York  (without  regard to  conflicts of laws  principles),  and the
obligations, rights and remedies of the parties hereunder shall be determined in
accordance with such laws.

            SECTION 10.05 NOTICES.

            All  demands,  notices  and  communications  hereunder  shall  be in
writing and shall be deemed to have been duly given if  personally  delivered at
or mailed by certified or registered mail,  return receipt  requested (i) in the
case of the Seller,  to Norwest Asset Securities  Corporation,  7485 New Horizon
Way,  Frederick,  Maryland 21703,  Attention:  Chief Executive Officer,  or such
other  address as may  hereafter  be  furnished  to the Master  Servicer and the
Trustee in writing by the Seller,  (ii) in the case of the Master  Servicer,  to
Norwest Bank Minnesota,  National Association,  7485 New Horizon Way, Frederick,
Maryland 21703, Attention: Vice President or such other address as may hereafter
be furnished to the Seller and the Trustee in writing by the Master Servicer and
(iii) in the case of the Trustee,  to the Corporate Trust Office,  or such other
address as may  hereafter be furnished to the Seller and the Master  Servicer in
writing by the Trustee, in each case Attention:  Corporate Trust Department. Any
notice required or permitted to be mailed to a Certificateholder  shall be given
by first class mail, postage prepaid,  at the address of such Holder as shown in
the  Certificate  Register.  Any notice  mailed or  transmitted  within the time
prescribed in this Agreement  shall be  conclusively  presumed to have been duly
given,  whether or not the addressee  receives such notice,  provided,  however,
that any  demand,  notice or  communication  to or upon the  Seller,  the Master
Servicer or the Trustee shall not be effective until received.

            For all  purposes  of  this  Agreement,  in the  absence  of  actual
knowledge by an officer of the Master Servicer, the Master Servicer shall not be
deemed to have  knowledge  of any act or failure to act of any  Servicer  unless
notified   thereof   in   writing   by  the   Trustee,   such   Servicer   or  a
Certificateholder.

            SECTION 10.06 SEVERABILITY OF PROVISIONS.

            If any one or more of the covenants, agreements, provisions or terms
of this Agreement  shall be for any reason  whatsoever  held invalid,  then such
covenants,  agreements,  provisions or terms shall be deemed  severable from the
remaining covenants, agreements, provisions or terms of this Agreement and shall
in no way affect the validity or  enforceability of the other provisions of this
Agreement or of the Certificates or the rights of the Holders thereof.

            SECTION 10.07 SPECIAL NOTICES TO RATING AGENCIES.

            (a) The Trustee  shall give prompt  notice to each Rating  Agency of
the occurrence of any of the following events of which it has notice:

            (i) any amendment to this Agreement pursuant to Section 10.01(a);

            (ii) any sale or  transfer of the Class B  Certificates  pursuant to
      Section 5.02 to an affiliate of the Seller;

            (iii) any  assignment  by the  Master  Servicer  of its  rights  and
      delegation of its duties pursuant to Section 6.06;

            (iv) any  resignation  of the Master  Servicer  pursuant  to Section
      6.04;

            (v) the  occurrence  of any of the  Events of Default  described  in
      Section 7.01;

            (vi) any notice of termination given to the Master Servicer pursuant
      to Section 7.01;

            (vii)  the  appointment  of any  successor  to the  Master  Servicer
      pursuant to Section 7.05; or

            (viii) the making of a final payment pursuant to Section 9.01.

            (b) The Master  Servicer  shall give  prompt  notice to each  Rating
Agency of the occurrence of any of the following events:

            (i) the appointment of a Custodian pursuant to Section 2.02;

            (ii) the  resignation or removal of the Trustee  pursuant to Section
      8.08;

            (iii) the  appointment  of a successor  trustee  pursuant to Section
      8.09; or

            (iv) the sale, transfer or other disposition in a single transaction
      of 50% or more of the equity interests in the Master Servicer.

            (c) The Master Servicer shall deliver to each Rating Agency:

            (i) reports prepared pursuant to Section 3.05; and

            (ii) statements prepared pursuant to Section 4.04.

            SECTION 10.08 COVENANT OF SELLER.

            The  Seller  shall not amend  Article  Third of its  Certificate  of
Incorporation without the prior written consent of each Rating Agency rating the
Certificates.

            SECTION 10.09 RECHARACTERIZATION.

            The Parties  intend the  conveyance  by the Seller to the Trustee of
all of its right,  title and interest in and to the Mortgage  Loans  pursuant to
this Agreement to constitute a purchase and sale and not a loan. Notwithstanding
the  foregoing,  to the extent that such  conveyance is held not to constitute a
sale under applicable law, it is intended that this Agreement shall constitute a
security  agreement under  applicable law and that the Seller shall be deemed to
have  granted to the Trustee a first  priority  security  interest in all of the
Seller's right, title and interest in and to the Mortgage Loans.


<PAGE>



                                   ARTICLE XI

                             TERMS FOR CERTIFICATES

            SECTION 11.01 CLASS A FIXED PASS-THROUGH RATE.

            The Class A Fixed Pass-Through Rate is 6.500% per annum.

            SECTION 11.02 CUT-OFF DATE.

            The Cut-Off Date for the Certificates is May 1, 1999.

            SECTION 11.03 CUT-OFF DATE AGGREGATE PRINCIPAL BALANCE.

            The Cut-Off Date Aggregate Principal Balance is $300,163,218.54.

            SECTION 11.04 ORIGINAL CLASS A PERCENTAGE.

            The Original Class A Percentage is 95.99131929%.

            SECTION 11.05 ORIGINAL  PRINCIPAL BALANCES OF THE CLASSES OF CLASS A
CERTIFICATES.

            As to the following  Classes of Class A Certificates,  the Principal
Balance of such Class as of the Cut-Off Date, as follows:

                                                      Original
                   Class                          Principal Balance
                   -----                          -----------------
                Class A-1                           $10,000,000.00
                Class A-2                           $13,000,000.00
                Class A-3                           $17,119,000.00
                Class A-4                           $21,297,000.00
                Class A-5                           $24,748,000.00
                Class A-7                          $110,625,000.00
                Class A-8                            $3,929,000.00
                Class A-9                            $3,929,000.00
                Class A-10                          $44,250,000.00
                Class A-11                          $12,828,000.00
                Class A-12                           $4,185,000.00
                Class A-13                          $18,605,000.00
                Class A-14                           $2,992,000.00
                Class A-PO                             $649,468.62
                Class A-R                                  $100.00
                Class A-LR                                 $100.00

            SECTION 11.05(A) ORIGINAL CLASS A-6 NOTIONAL AMOUNT.

            The Original Class A-6 Notional Amount is $24,748,000.00.

            SECTION 11.06 ORIGINAL CLASS A NON-PO PRINCIPAL BALANCE.

            The Original Class A Non-PO Principal Balance is $287,507,200.00.

            SECTION 11.07 ORIGINAL SUBORDINATED PERCENTAGE.

            The Original Subordinated Percentage is 4.00868071%.

            SECTION 11.08 ORIGINAL CLASS B-1 PERCENTAGE.

            The Original Class B-1 Percentage is 2.10441090%.

            SECTION 11.09 ORIGINAL CLASS B-2 PERCENTAGE.

            The Original Class B-2 Percentage is 0.80163265%.

            SECTION 11.10 ORIGINAL CLASS B-3 PERCENTAGE.

            The Original Class B-3 Percentage is 0.35090209%.

            SECTION 11.11 ORIGINAL CLASS B-4 PERCENTAGE.

            The Original Class B-4 Percentage is 0.35056821%.

            SECTION 11.12 ORIGINAL CLASS B-5 PERCENTAGE.

            The Original Class B-5 Percentage is 0.17060986%.

            SECTION 11.13 ORIGINAL CLASS B-6 PERCENTAGE.

            The Original Class B-6 Percentage is 0.23055700%.

            SECTION 11.14 ORIGINAL CLASS B PRINCIPAL BALANCE.

            The Original Class B Principal Balance is $12,006,549.92.

            SECTION 11.15 ORIGINAL  PRINCIPAL BALANCES OF THE CLASSES OF CLASS B
CERTIFICATES.

            As to the following  Classes of Class B  Certificate,  the Principal
Balance of such Class as of the Cut-Off Date, is as follows:

                                                         Original
                    Class                            Principal Balance
                    -----                            -----------------
                  Class B-1                            $6,303,000.00
                  Class B-2                            $2,401,000.00
                  Class B-3                            $1,051,000.00
                  Class B-4                            $1,050,000.00
                  Class B-5                              $511,000.00

            SECTION 11.16 ORIGINAL CLASS B-1 FRACTIONAL INTEREST.

            The Original Class B-1 Fractional Interest is 1.90426981%.

            SECTION 11.17 ORIGINAL CLASS B-2 FRACTIONAL INTEREST.

            The Original Class B-2 Fractional Interest is 1.10263716%.

            SECTION 11.18 ORIGINAL CLASS B-3 FRACTIONAL INTEREST.

            The Original Class B-3 Fractional Interest is 0.75173507%.

            SECTION 11.19 ORIGINAL CLASS B-4 FRACTIONAL INTEREST.

            The Original Class B-4 Fractional Interest is 0.40116686%.

            SECTION 11.20 ORIGINAL CLASS B-5 FRACTIONAL INTEREST.

            The Original B-5 Fractional Interest is 0.23055700%.

            SECTION 11.21 CLOSING DATE.

            The Closing Date is May 28, 1999.

            SECTION 11.22 RIGHT TO PURCHASE.

            The  right of the  Seller  to  purchase  all of the  Mortgage  Loans
pursuant to Section 9.01 hereof  shall be  conditioned  upon the Pool  Scheduled
Principal Balance of the Mortgage Loans being less than  $30,016,321.85  (10% of
the Cut-Off Date Aggregate Principal Balance) at the time of any such purchase.

            SECTION 11.23 WIRE TRANSFER ELIGIBILITY.

            With  respect to the Class A (other than the Class A-6,  Class A-PO,
Class A-R and Class A-LR Certificates) and the Class B Certificates, the minimum
Denomination  eligible for wire transfer on each  Distribution Date is $500,000.
With  respect  to the  Class  A-6  and  Class  A-PO  Certificates,  the  minimum
Denomination  eligible  for  wire  transfer  on each  Distribution  Date is 100%
Percentage Interest.  The Class A-R and Class A-LR Certificates are not eligible
for wire transfer.

            SECTION 11.24 SINGLE CERTIFICATE.

            A Single  Certificate for each Class of Class A Certificates  (other
than the Class A-6, Class A-8,  Class A-9, Class A-PO,  Class A-R and Class A-LR
Certificates)  and each Class of the Class B Certificates  (other than the Class
B-4, Class B-5 and Class B-6 Certificates) represents a $100,000 Denomination. A
Single  Certificate for the Class A-6  Certificates  represents a $12,374,000.00
Denomination.  A Single Certificate for the Class A-8 and Class A-9 Certificates
represents a $1,000  Denomination.  A Single  Certificate  for the Class A-R and
Class A-LR Certificates represents a $100 Denomination. A Single Certificate for
the  Class  B-4,  Class B-5 and Class B-6  Certificates  represents  a  $250,000
Denomination.  A Single Certificate for the Class A-PO Certificates represents a
$649,468.62 Denomination.

            SECTION 11.25 SERVICING FEE RATE.

            The rate used to calculate  the  Servicing Fee is equal to such rate
as is set forth on the Mortgage Loan Schedule with respect to a Mortgage Loan.

            SECTION 11.26 MASTER SERVICING FEE RATE.

            The  rate  used to  calculate  the  Master  Servicing  Fee for  each
Mortgage Loan is 0.017% per annum.


<PAGE>


            IN WITNESS WHEREOF,  the Seller, the Master Servicer and the Trustee
have  caused  their  names to be  signed  hereto  by their  respective  officers
thereunto duly authorized, all as of the day and year first above written.

                                   NORWEST ASSET SECURITIES
                                   CORPORATION
                                      as Seller


                                   By:
                                      ------------------------------------------
                                      Name: Alan S. McKenney
                                      Title: Vice President

                                   NORWEST BANK MINNESOTA, NATIONAL ASSOCIATION
                                      as Master Servicer


                                   By:
                                      ------------------------------------------
                                      Name: Nancy E. Burgess
                                      Title: Vice President

                                   FIRST UNION NATIONAL BANK
                                      as Trustee


                                   By:
                                      ------------------------------------------
                                      Name:
                                      Title:

Attest:

By:
   -----------------------------------------
Name:
   -----------------------------------------
Title:
   -----------------------------------------


<PAGE>


STATE OF MARYLAND   )
    )    ss.:
COUNTY OF FREDERICK )

            On this 28th day of May, 1999, before me, a notary public in and for
the State of Maryland,  personally  appeared Alan S. McKenney,  known to me who,
being by me duly sworn, did depose and say that he resides at McLean,  Virginia;
that he is a Vice President of Norwest Asset Securities Corporation,  a Delaware
corporation, one of the parties that executed the foregoing instrument; and that
he  signed  his  name  thereto  by  order  of the  Board  of  Directors  of said
corporation.


- -------------------------
Notary Public

[NOTARIAL SEAL]


<PAGE>


STATE OF MARYLAND    )
                     )   ss.:
COUNTY OF FREDERICK  )

            On this 28th day of May, 1999, before me, a notary public in and for
the State of Maryland,  personally  appeared Nancy E. Burgess,  known to me who,
being by me duly  sworn,  did  depose  and say that she  resides  at  Frederick,
Maryland;  that she is a Vice  President  of Norwest  Bank  Minnesota,  National
Association,  a national banking  association,  one of the parties that executed
the foregoing  instrument;  and that she signed her name thereto by order of the
Board of Directors of said corporation.


- -------------------------
Notary Public

[NOTARIAL SEAL]


<PAGE>



STATE OF NORTH CAROLINA   )
                          )  ss.:
COUNTY OF                 )

            On this 28th day of May, 1999, before me, a notary public in and for
the State of North Carolina, personally appeared _____________________, known to
me  who,  being  by me duly  sworn,  did  depose  and say  that  he  resides  at
__________________,  North Carolina; that he is a _____________________ of First
Union National  Bank, a national  banking  association,  one of the parties that
executed  the  foregoing  instrument;  and that s/he signed his name  thereto by
order of the Board of Directors of said corporation.


- -------------------------
Notary Public

[NOTARIAL SEAL]


<PAGE>


                                   SCHEDULE I

    Norwest Asset Securities Corporation, Mortgage Pass-Through Certificates,
                                 Series 1999-16
                 Applicable Unscheduled Principal Receipt Period

<TABLE>
<CAPTION>
                                          Full Unscheduled        Partial Unscheduled
              Servicer                   Principal Receipts        Principal Receipts
              --------                   ------------------        ------------------

<S>                                          <C>                       <C>
Norwest Mortgage, Inc. (Exhibit F-1)         Prior Month               Prior Month
Norwest Mortgage, Inc. (Exhibit F-2)          Mid Month                 Mid Month
SunTrust Mortgage, Inc.                       Mid Month                Prior Month
Bank United                                   Mid Month                Prior Month
BankNorth Mortgage Company, Inc.              Mid Month                Prior Month
National City Mortgage Company                Mid Month                Prior Month
GMAC Mortgage Corporation                     Mid Month                Prior Month
Countrywide Home Loans, Inc.                 Prior Month               Prior Month
America First Credit Union                    Mid Month                Prior Month
Charter Bank for Savings, FSB                 Mid Month                Prior Month
</TABLE>

<PAGE>

                                   EXHIBIT A-1
                     [FORM OF FACE OF CLASS A-1 CERTIFICATE]

            [UNLESS   THIS   CERTIFICATE   IS   PRESENTED   BY   AN   AUTHORIZED
REPRESENTATIVE  OF THE  DEPOSITORY  TRUST COMPANY TO THE SELLER OR ITS AGENT FOR
REGISTRATION OF TRANSFER,  EXCHANGE OR PAYMENT,  AND ANY  CERTIFICATE  ISSUED IS
REGISTERED  IN THE NAME OF CEDE & CO.  OR SUCH  OTHER  NAME AS  REQUESTED  BY AN
AUTHORIZED  REPRESENTATIVE  OF THE  DEPOSITORY  TRUST COMPANY AND ANY PAYMENT IS
MADE TO CEDE & CO.,  ANY  TRANSFER,  PLEDGE  OR OTHER  USE  HEREOF  FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL  SINCE THE  REGISTERED  OWNER  HEREOF,
CEDE & CO., HAS AN INTEREST HEREIN.]

                        MORTGAGE PASS-THROUGH CERTIFICATE
                            SERIES 1999-16 CLASS A-1

                    evidencing an interest in a pool of fixed
                    interest rate, conventional, monthly pay,
                      fully amortizing, first lien, one- to
                four-family residential mortgage loans, which may
                    include loans secured by shares issued by
                    cooperative housing corporations, sold by

                      NORWEST ASSET SECURITIES CORPORATION
                (Not an interest in or obligation of the Seller)

            THIS  CERTIFICATE DOES NOT EVIDENCE AN OBLIGATION OF, OR AN INTEREST
IN, THE SELLER, THE MASTER SERVICER, THE TRUSTEE OR ANY OF THEIR AFFILIATES, AND
IS NOT INSURED OR GUARANTEED BY THE SELLER, THE MASTER SERVICER,  THE TRUSTEE OR
ANY OF THEIR AFFILIATES, OR BY ANY GOVERNMENT AGENCY OR PRIVATE INSURER.

            DISTRIBUTIONS  IN  REDUCTION  OF  THE  PRINCIPAL   BALANCE  OF  THIS
CERTIFICATE  WILL BE MADE IN THE MANNER  DESCRIBED IN THE POOLING AND  SERVICING
AGREEMENT. ACCORDINGLY, THE OUTSTANDING PRINCIPAL BALANCE OF THIS CERTIFICATE AT
ANY TIME MAY BE LESS THAN THE INITIAL PRINCIPAL BALANCE REPRESENTED HEREBY.

Certificate No.                           Cut-Off Date: May 1, 1999

CUSIP No.:                                First Distribution Date: June 25, 1999

Percentage Interest evidenced             Denomination: $
by this Certificate: %

Final Scheduled Maturity Date:            June 25, 2029


            THIS  CERTIFIES THAT  ___________________________  is the registered
owner of the  Percentage  Interest  evidenced  by this  Certificate  in  monthly
distributions  to the Holders of the Class A-1  Certificates  with  respect to a
Trust Estate consisting of a pool of fixed interest rate, conventional,  monthly
pay, fully  amortizing,  first lien,  one- to four-family  residential  mortgage
loans,  other than the Fixed Retained Yield, if any, with respect  thereto,  and
which may  include  loans  secured  by  shares  issued  by  cooperative  housing
corporations  (the  "Mortgage  Loans"),   formed  by  Norwest  Asset  Securities
Corporation  (hereinafter called the "Seller", which term includes any successor
entity  under the  Agreement  referred to below).  The Trust  Estate was created
pursuant  to a Pooling  and  Servicing  Agreement  dated as of May 28, 1999 (the
"Agreement") among the Seller, Norwest Bank Minnesota,  National Association, as
master  servicer  (the "Master  Servicer")  and First Union  National  Bank,  as
trustee (the  "Trustee"),  a summary of certain of the  pertinent  provisions of
which  is  set  forth  hereinafter.  To  the  extent  not  defined  herein,  the
capitalized  terms used herein have the  meanings  ascribed to such terms in the
Agreement.  This  Certificate  is issued  under  and is  subject  to the  terms,
provisions  and conditions of the  Agreement,  to which  Agreement the Holder of
this  Certificate by virtue of the  acceptance  hereof assents and by which such
Holder is bound.

            Pursuant to the terms of the Agreement,  a distribution will be made
on the 25th day of each  month or, if such 25th day is not a Business  Day,  the
Business Day immediately following (the "Distribution Date"),  commencing on the
first  Distribution  Date  specified  above,  to the  Person in whose  name this
Certificate  is  registered at the close of business on the last Business Day of
the month  preceding the month of such  distribution,  in an amount equal to the
product of the Percentage Interest evidenced by this Certificate and the Class A
Distribution Amount for the Class A-1 Certificates required to be distributed to
Holders of the Class A-1  Certificates  on such  Distribution  Date,  subject to
adjustment in certain  events as specified in the  Agreement.  Distributions  in
reduction of the Principal  Balance of certain  Classes of Class A  Certificates
may not commence on the first  Distribution Date specified above.  Distributions
of principal  will be  allocated  among the Classes of Class A  Certificates  in
accordance with the provisions of the Agreement.  The  pass-through  rate on the
Class A-1 Certificates  applicable to each  Distribution Date will be 6.000% per
annum.  The amount of interest  which accrues on this  Certificate  in any month
will  be  subject  to  reduction  with  respect  to any  Non-Supported  Interest
Shortfall and the interest  portion of certain  Realized Losses allocated to the
Class A-1 Certificates, as described in the Agreement.

            Distributions  on this  Certificate  will be made on  behalf  of the
Trustee  either by the Master  Servicer or by a Paying  Agent  appointed  by the
Master Servicer by check mailed to the address of the Person  entitled  thereto,
as such name and address shall appear on the Certificate  Register,  unless such
Person is entitled to receive payments by wire transfer in immediately available
funds in accordance with the Pooling and Servicing Agreement and such Person has
notified the Master  Servicer  pursuant to the Pooling and  Servicing  Agreement
that such  payments  are to be made by wire  transfer of  immediately  available
funds.  Notwithstanding  the above,  the final  distribution in reduction of the
Principal  Balance  of this  Certificate  will be made  after due  notice of the
pendency of such  distribution and only upon  presentation and surrender of this
Certificate at the office or agency specified by the Trustee for that purpose in
the notice of final distribution.

            Reference  is  hereby  made  to  the  further   provisions  of  this
Certificate set forth on the reverse hereof,  which further provisions shall for
all purposes have the same effect as if set forth at this place.

            This Certificate  constitutes a "regular interest" in a "real estate
mortgage  investment  conduit" as those terms are defined in Section  860G(a)(1)
and  Section  860D,  respectively,  of the  Internal  Revenue  Code of 1986,  as
amended.

            Unless this  Certificate  has been  countersigned  by an  authorized
officer of the  Trustee,  by manual  signature,  this  Certificate  shall not be
entitled to any benefit under the Agreement or be valid for any purpose.


<PAGE>



            IN WITNESS  WHEREOF,  the Trustee has caused this  Certificate to be
duly executed as of the date set forth below.

Dated:

                                                First Union National Bank,
                                                   Trustee


                                                By
                                                  ------------------------------
                                                  Authorized Officer

Countersigned:

First Union National Bank,
   Trustee


By
  ------------------------------
  Authorized Officer


<PAGE>



                                   EXHIBIT A-2
                     [FORM OF FACE OF CLASS A-2 CERTIFICATE]

            [UNLESS   THIS   CERTIFICATE   IS   PRESENTED   BY   AN   AUTHORIZED
REPRESENTATIVE  OF THE  DEPOSITORY  TRUST COMPANY TO THE SELLER OR ITS AGENT FOR
REGISTRATION OF TRANSFER,  EXCHANGE OR PAYMENT,  AND ANY  CERTIFICATE  ISSUED IS
REGISTERED  IN THE NAME OF CEDE & CO.  OR SUCH  OTHER  NAME AS  REQUESTED  BY AN
AUTHORIZED  REPRESENTATIVE  OF THE  DEPOSITORY  TRUST COMPANY AND ANY PAYMENT IS
MADE TO CEDE & CO.,  ANY  TRANSFER,  PLEDGE  OR OTHER  USE  HEREOF  FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL  SINCE THE  REGISTERED  OWNER  HEREOF,
CEDE & CO., HAS AN INTEREST HEREIN.]

                        MORTGAGE PASS-THROUGH CERTIFICATE
                            SERIES 1999-16 CLASS A-2

                    evidencing an interest in a pool of fixed
                    interest rate, conventional, monthly pay,
                      fully amortizing, first lien, one- to
                four-family residential mortgage loans, which may
                    include loans secured by shares issued by
                    cooperative housing corporations, sold by

                      NORWEST ASSET SECURITIES CORPORATION
                (Not an interest in or obligation of the Seller)

            THIS  CERTIFICATE DOES NOT EVIDENCE AN OBLIGATION OF, OR AN INTEREST
IN, THE SELLER, THE MASTER SERVICER, THE TRUSTEE OR ANY OF THEIR AFFILIATES, AND
IS NOT INSURED OR GUARANTEED BY THE SELLER, THE MASTER SERVICER,  THE TRUSTEE OR
ANY OF THEIR AFFILIATES, OR BY ANY GOVERNMENT AGENCY OR PRIVATE INSURER.

            DISTRIBUTIONS  IN  REDUCTION  OF  THE  PRINCIPAL   BALANCE  OF  THIS
CERTIFICATE  WILL BE MADE IN THE MANNER  DESCRIBED IN THE POOLING AND  SERVICING
AGREEMENT. ACCORDINGLY, THE OUTSTANDING PRINCIPAL BALANCE OF THIS CERTIFICATE AT
ANY TIME MAY BE LESS THAN THE INITIAL PRINCIPAL BALANCE REPRESENTED HEREBY.

Certificate No.                          Cut-Off Date: May 1, 1999

CUSIP No.:                               First Distribution Date: June 25, 1999

Percentage Interest evidenced            Denomination: $
by this Certificate: %

Final Scheduled Maturity Date:           June 25, 2029


            THIS  CERTIFIES THAT  ___________________________  is the registered
owner of the  Percentage  Interest  evidenced  by this  Certificate  in  monthly
distributions  to the Holders of the Class A-2  Certificates  with  respect to a
Trust Estate consisting of a pool of fixed interest rate, conventional,  monthly
pay, fully  amortizing,  first lien,  one- to four-family  residential  mortgage
loans,  other than the Fixed Retained Yield, if any, with respect  thereto,  and
which may  include  loans  secured  by  shares  issued  by  cooperative  housing
corporations  (the  "Mortgage  Loans"),   formed  by  Norwest  Asset  Securities
Corporation  (hereinafter called the "Seller", which term includes any successor
entity  under the  Agreement  referred to below).  The Trust  Estate was created
pursuant  to a Pooling  and  Servicing  Agreement  dated as of May 28, 1999 (the
"Agreement") among the Seller, Norwest Bank Minnesota,  National Association, as
master  servicer  (the "Master  Servicer")  and First Union  National  Bank,  as
trustee (the  "Trustee"),  a summary of certain of the  pertinent  provisions of
which  is  set  forth  hereinafter.  To  the  extent  not  defined  herein,  the
capitalized  terms used herein have the  meanings  ascribed to such terms in the
Agreement.  This  Certificate  is issued  under  and is  subject  to the  terms,
provisions  and conditions of the  Agreement,  to which  Agreement the Holder of
this  Certificate by virtue of the  acceptance  hereof assents and by which such
Holder is bound.

            Pursuant to the terms of the Agreement,  a distribution will be made
on the 25th day of each  month or, if such 25th day is not a Business  Day,  the
Business Day immediately following (the "Distribution Date"),  commencing on the
first  Distribution  Date  specified  above,  to the  Person in whose  name this
Certificate  is  registered at the close of business on the last Business Day of
the month  preceding the month of such  distribution,  in an amount equal to the
product of the Percentage Interest evidenced by this Certificate and the Class A
Distribution Amount for the Class A-2 Certificates required to be distributed to
Holders of the Class A-2  Certificates  on such  Distribution  Date,  subject to
adjustment in certain  events as specified in the  Agreement.  Distributions  in
reduction of the Principal  Balance of certain  Classes of Class A  Certificates
may not commence on the first  Distribution Date specified above.  Distributions
of principal  will be  allocated  among the Classes of Class A  Certificates  in
accordance with the provisions of the Agreement.  The  pass-through  rate on the
Class A-2 Certificates  applicable to each  Distribution Date will be 6.000% per
annum.  The amount of interest  which accrues on this  Certificate  in any month
will  be  subject  to  reduction  with  respect  to any  Non-Supported  Interest
Shortfall and the interest  portion of certain  Realized Losses allocated to the
Class A-2 Certificates, as described in the Agreement.

            Distributions  on this  Certificate  will be made on  behalf  of the
Trustee  either by the Master  Servicer or by a Paying  Agent  appointed  by the
Master Servicer by check mailed to the address of the Person  entitled  thereto,
as such name and address shall appear on the Certificate  Register,  unless such
Person is entitled to receive payments by wire transfer in immediately available
funds in accordance with the Pooling and Servicing Agreement and such Person has
notified the Master  Servicer  pursuant to the Pooling and  Servicing  Agreement
that such  payments  are to be made by wire  transfer of  immediately  available
funds.  Notwithstanding  the above,  the final  distribution in reduction of the
Principal  Balance  of this  Certificate  will be made  after due  notice of the
pendency of such  distribution and only upon  presentation and surrender of this
Certificate at the office or agency specified by the Trustee for that purpose in
the notice of final distribution.

            Reference  is  hereby  made  to  the  further   provisions  of  this
Certificate set forth on the reverse hereof,  which further provisions shall for
all purposes have the same effect as if set forth at this place.

            This Certificate  constitutes a "regular interest" in a "real estate
mortgage  investment  conduit" as those terms are defined in Section  860G(a)(1)
and  Section  860D,  respectively,  of the  Internal  Revenue  Code of 1986,  as
amended.

            Unless this  Certificate  has been  countersigned  by an  authorized
officer of the  Trustee,  by manual  signature,  this  Certificate  shall not be
entitled to any benefit under the Agreement or be valid for any purpose.


<PAGE>



            IN WITNESS  WHEREOF,  the Trustee has caused this  Certificate to be
duly executed as of the date set forth below.

Dated:

                                                First Union National Bank,
                                                   Trustee


                                                By
                                                  ------------------------------
                                                  Authorized Officer

Countersigned:

First Union National Bank,
   Trustee


By
  ------------------------------
  Authorized Officer


<PAGE>

                                   EXHIBIT A-3
                     [FORM OF FACE OF CLASS A-3 CERTIFICATE]

            [UNLESS   THIS   CERTIFICATE   IS   PRESENTED   BY   AN   AUTHORIZED
REPRESENTATIVE  OF THE  DEPOSITORY  TRUST COMPANY TO THE SELLER OR ITS AGENT FOR
REGISTRATION OF TRANSFER,  EXCHANGE OR PAYMENT,  AND ANY  CERTIFICATE  ISSUED IS
REGISTERED  IN THE NAME OF CEDE & CO.  OR SUCH  OTHER  NAME AS  REQUESTED  BY AN
AUTHORIZED  REPRESENTATIVE  OF THE  DEPOSITORY  TRUST COMPANY AND ANY PAYMENT IS
MADE TO CEDE & CO.,  ANY  TRANSFER,  PLEDGE  OR OTHER  USE  HEREOF  FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL  SINCE THE  REGISTERED  OWNER  HEREOF,
CEDE & CO., HAS AN INTEREST HEREIN.]

                        MORTGAGE PASS-THROUGH CERTIFICATE
                            SERIES 1999-16 CLASS A-3

                    evidencing an interest in a pool of fixed
                    interest rate, conventional, monthly pay,
                      fully amortizing, first lien, one- to
                four-family residential mortgage loans, which may
                    include loans secured by shares issued by
                    cooperative housing corporations, sold by

                      NORWEST ASSET SECURITIES CORPORATION
                (Not an interest in or obligation of the Seller)

            THIS  CERTIFICATE DOES NOT EVIDENCE AN OBLIGATION OF, OR AN INTEREST
IN, THE SELLER, THE MASTER SERVICER, THE TRUSTEE OR ANY OF THEIR AFFILIATES, AND
IS NOT INSURED OR GUARANTEED BY THE SELLER, THE MASTER SERVICER,  THE TRUSTEE OR
ANY OF THEIR AFFILIATES, OR BY ANY GOVERNMENT AGENCY OR PRIVATE INSURER.

            DISTRIBUTIONS  IN  REDUCTION  OF  THE  PRINCIPAL   BALANCE  OF  THIS
CERTIFICATE  WILL BE MADE IN THE MANNER  DESCRIBED IN THE POOLING AND  SERVICING
AGREEMENT. ACCORDINGLY, THE OUTSTANDING PRINCIPAL BALANCE OF THIS CERTIFICATE AT
ANY TIME MAY BE LESS THAN THE INITIAL PRINCIPAL BALANCE REPRESENTED HEREBY.

Certificate No.                           Cut-Off Date: May 1, 1999

CUSIP No.:                                First Distribution Date: June 25, 1999

Percentage Interest evidenced             Denomination: $
by this Certificate: %

Final Scheduled Maturity Date:            June 25, 2029


            THIS  CERTIFIES THAT  ___________________________  is the registered
owner of the  Percentage  Interest  evidenced  by this  Certificate  in  monthly
distributions  to the Holders of the Class A-3  Certificates  with  respect to a
Trust Estate consisting of a pool of fixed interest rate, conventional,  monthly
pay, fully  amortizing,  first lien,  one- to four-family  residential  mortgage
loans,  other than the Fixed Retained Yield, if any, with respect  thereto,  and
which may  include  loans  secured  by  shares  issued  by  cooperative  housing
corporations  (the  "Mortgage  Loans"),   formed  by  Norwest  Asset  Securities
Corporation  (hereinafter called the "Seller", which term includes any successor
entity  under the  Agreement  referred to below).  The Trust  Estate was created
pursuant  to a Pooling  and  Servicing  Agreement  dated as of May 28, 1999 (the
"Agreement") among the Seller, Norwest Bank Minnesota,  National Association, as
master  servicer  (the "Master  Servicer")  and First Union  National  Bank,  as
trustee (the  "Trustee"),  a summary of certain of the  pertinent  provisions of
which  is  set  forth  hereinafter.  To  the  extent  not  defined  herein,  the
capitalized  terms used herein have the  meanings  ascribed to such terms in the
Agreement.  This  Certificate  is issued  under  and is  subject  to the  terms,
provisions  and conditions of the  Agreement,  to which  Agreement the Holder of
this  Certificate by virtue of the  acceptance  hereof assents and by which such
Holder is bound.

            Pursuant to the terms of the Agreement,  a distribution will be made
on the 25th day of each  month or, if such 25th day is not a Business  Day,  the
Business Day immediately following (the "Distribution Date"),  commencing on the
first  Distribution  Date  specified  above,  to the  Person in whose  name this
Certificate  is  registered at the close of business on the last Business Day of
the month  preceding the month of such  distribution,  in an amount equal to the
product of the Percentage Interest evidenced by this Certificate and the Class A
Distribution Amount for the Class A-3 Certificates required to be distributed to
Holders of the Class A-3  Certificates  on such  Distribution  Date,  subject to
adjustment in certain  events as specified in the  Agreement.  Distributions  in
reduction of the Principal  Balance of certain  Classes of Class A  Certificates
may not commence on the first  Distribution Date specified above.  Distributions
of principal  will be  allocated  among the Classes of Class A  Certificates  in
accordance with the provisions of the Agreement.  The  pass-through  rate on the
Class A-3 Certificates  applicable to each  Distribution Date will be 6.000% per
annum.  The amount of interest  which accrues on this  Certificate  in any month
will  be  subject  to  reduction  with  respect  to any  Non-Supported  Interest
Shortfall and the interest  portion of certain  Realized Losses allocated to the
Class A-3 Certificates, as described in the Agreement.

            Distributions  on this  Certificate  will be made on  behalf  of the
Trustee  either by the Master  Servicer or by a Paying  Agent  appointed  by the
Master Servicer by check mailed to the address of the Person  entitled  thereto,
as such name and address shall appear on the Certificate  Register,  unless such
Person is entitled to receive payments by wire transfer in immediately available
funds in accordance with the Pooling and Servicing Agreement and such Person has
notified the Master  Servicer  pursuant to the Pooling and  Servicing  Agreement
that such  payments  are to be made by wire  transfer of  immediately  available
funds.  Notwithstanding  the above,  the final  distribution in reduction of the
Principal  Balance  of this  Certificate  will be made  after due  notice of the
pendency of such  distribution and only upon  presentation and surrender of this
Certificate at the office or agency specified by the Trustee for that purpose in
the notice of final distribution.

            Reference  is  hereby  made  to  the  further   provisions  of  this
Certificate set forth on the reverse hereof,  which further provisions shall for
all purposes have the same effect as if set forth at this place.

            This Certificate  constitutes a "regular interest" in a "real estate
mortgage  investment  conduit" as those terms are defined in Section  860G(a)(1)
and  Section  860D,  respectively,  of the  Internal  Revenue  Code of 1986,  as
amended.

            Unless this  Certificate  has been  countersigned  by an  authorized
officer of the  Trustee,  by manual  signature,  this  Certificate  shall not be
entitled to any benefit under the Agreement or be valid for any purpose.


<PAGE>



            IN WITNESS  WHEREOF,  the Trustee has caused this  Certificate to be
duly executed as of the date set forth below.

Dated:

                                                First Union National Bank,
                                                   Trustee


                                                By
                                                  ------------------------------
                                                  Authorized Officer

Countersigned:

First Union National Bank,
   Trustee


By
  ------------------------------
  Authorized Officer


<PAGE>


                                   EXHIBIT A-4
                     [FORM OF FACE OF CLASS A-4 CERTIFICATE]

            [UNLESS   THIS   CERTIFICATE   IS   PRESENTED   BY   AN   AUTHORIZED
REPRESENTATIVE  OF THE  DEPOSITORY  TRUST COMPANY TO THE SELLER OR ITS AGENT FOR
REGISTRATION OF TRANSFER,  EXCHANGE OR PAYMENT,  AND ANY  CERTIFICATE  ISSUED IS
REGISTERED  IN THE NAME OF CEDE & CO.  OR SUCH  OTHER  NAME AS  REQUESTED  BY AN
AUTHORIZED  REPRESENTATIVE  OF THE  DEPOSITORY  TRUST COMPANY AND ANY PAYMENT IS
MADE TO CEDE & CO.,  ANY  TRANSFER,  PLEDGE  OR OTHER  USE  HEREOF  FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL  SINCE THE  REGISTERED  OWNER  HEREOF,
CEDE & CO., HAS AN INTEREST HEREIN.]

                        MORTGAGE PASS-THROUGH CERTIFICATE
                            SERIES 1999-16 CLASS A-4

                    evidencing an interest in a pool of fixed
                    interest rate, conventional, monthly pay,
                      fully amortizing, first lien, one- to
                four-family residential mortgage loans, which may
                    include loans secured by shares issued by
                    cooperative housing corporations, sold by

                      NORWEST ASSET SECURITIES CORPORATION
                (Not an interest in or obligation of the Seller)

            THIS  CERTIFICATE DOES NOT EVIDENCE AN OBLIGATION OF, OR AN INTEREST
IN, THE SELLER, THE MASTER SERVICER, THE TRUSTEE OR ANY OF THEIR AFFILIATES, AND
IS NOT INSURED OR GUARANTEED BY THE SELLER, THE MASTER SERVICER,  THE TRUSTEE OR
ANY OF THEIR AFFILIATES, OR BY ANY GOVERNMENT AGENCY OR PRIVATE INSURER.

            DISTRIBUTIONS  IN  REDUCTION  OF  THE  PRINCIPAL   BALANCE  OF  THIS
CERTIFICATE  WILL BE MADE IN THE MANNER  DESCRIBED IN THE POOLING AND  SERVICING
AGREEMENT. ACCORDINGLY, THE OUTSTANDING PRINCIPAL BALANCE OF THIS CERTIFICATE AT
ANY TIME MAY BE LESS THAN THE INITIAL PRINCIPAL BALANCE REPRESENTED HEREBY.

Certificate No.                     Cut-Off Date: May 1, 1999

CUSIP No.:                          First Distribution Date: June 25, 1999

Percentage Interest evidenced       Denomination: $
by this Certificate: %

Final Scheduled Maturity Date:      June 25, 2029


<PAGE>



            THIS  CERTIFIES THAT  ___________________________  is the registered
owner of the  Percentage  Interest  evidenced  by this  Certificate  in  monthly
distributions  to the Holders of the Class A-4  Certificates  with  respect to a
Trust Estate consisting of a pool of fixed interest rate, conventional,  monthly
pay, fully  amortizing,  first lien,  one- to four-family  residential  mortgage
loans,  other than the Fixed Retained Yield, if any, with respect  thereto,  and
which may  include  loans  secured  by  shares  issued  by  cooperative  housing
corporations  (the  "Mortgage  Loans"),   formed  by  Norwest  Asset  Securities
Corporation  (hereinafter called the "Seller", which term includes any successor
entity  under the  Agreement  referred to below).  The Trust  Estate was created
pursuant  to a Pooling  and  Servicing  Agreement  dated as of May 28, 1999 (the
"Agreement") among the Seller, Norwest Bank Minnesota,  National Association, as
master  servicer  (the "Master  Servicer")  and First Union  National  Bank,  as
trustee (the  "Trustee"),  a summary of certain of the  pertinent  provisions of
which  is  set  forth  hereinafter.  To  the  extent  not  defined  herein,  the
capitalized  terms used herein have the  meanings  ascribed to such terms in the
Agreement.  This  Certificate  is issued  under  and is  subject  to the  terms,
provisions  and conditions of the  Agreement,  to which  Agreement the Holder of
this  Certificate by virtue of the  acceptance  hereof assents and by which such
Holder is bound.

            Pursuant to the terms of the Agreement,  a distribution will be made
on the 25th day of each  month or, if such 25th day is not a Business  Day,  the
Business Day immediately following (the "Distribution Date"),  commencing on the
first  Distribution  Date  specified  above,  to the  Person in whose  name this
Certificate  is  registered at the close of business on the last Business Day of
the month  preceding the month of such  distribution,  in an amount equal to the
product of the Percentage Interest evidenced by this Certificate and the Class A
Distribution Amount for the Class A-4 Certificates required to be distributed to
Holders of the Class A-4  Certificates  on such  Distribution  Date,  subject to
adjustment in certain  events as specified in the  Agreement.  Distributions  in
reduction of the Principal  Balance of certain  Classes of Class A  Certificates
may not commence on the first  Distribution Date specified above.  Distributions
of principal  will be  allocated  among the Classes of Class A  Certificates  in
accordance with the provisions of the Agreement.  The  pass-through  rate on the
Class A-4 Certificates  applicable to each  Distribution Date will be 6.000% per
annum.  The amount of interest  which accrues on this  Certificate  in any month
will  be  subject  to  reduction  with  respect  to any  Non-Supported  Interest
Shortfall and the interest  portion of certain  Realized Losses allocated to the
Class A-4 Certificates, as described in the Agreement.

            Distributions  on this  Certificate  will be made on  behalf  of the
Trustee  either by the Master  Servicer or by a Paying  Agent  appointed  by the
Master Servicer by check mailed to the address of the Person  entitled  thereto,
as such name and address shall appear on the Certificate  Register,  unless such
Person is entitled to receive payments by wire transfer in immediately available
funds in accordance with the Pooling and Servicing Agreement and such Person has
notified the Master  Servicer  pursuant to the Pooling and  Servicing  Agreement
that such  payments  are to be made by wire  transfer of  immediately  available
funds.  Notwithstanding  the above,  the final  distribution in reduction of the
Principal  Balance  of this  Certificate  will be made  after due  notice of the
pendency of such  distribution and only upon  presentation and surrender of this
Certificate at the office or agency specified by the Trustee for that purpose in
the notice of final distribution.

            Reference  is  hereby  made  to  the  further   provisions  of  this
Certificate set forth on the reverse hereof,  which further provisions shall for
all purposes have the same effect as if set forth at this place.

            This  Certificate  is issued on May 28, 1999, and based on its issue
price of 98.37188%, including accrued interest, and a stated redemption price at
maturity equal to its initial  principal balance (plus 3 days of interest at the
pass-through  rate hereon),  is issued with original issue discount  ("OID") for
federal income tax purposes.  Assuming that this  Certificate pays in accordance
with projected cash flows  reflecting the prepayment  assumption of 275% SPA (as
defined in the  Prospectus  Supplement  dated May 21,  1999 with  respect to the
offering of the Class A Certificates (except the Class A-PO Certificates), Class
B-1, Class B-2 and Class B-3 Certificates)  used to price this Certificate:  (i)
the  amount of OID as a  percentage  of the  initial  principal  balance of this
Certificate is approximately  1.67812000%;  (ii) the annual yield to maturity of
this  Certificate,  compounded  monthly,  is approximately  6.35%; and (iii) the
amount of OID allocable to the short first accrual  period (May 28, 1999 to June
25, 1999) as a percentage of the initial  principal balance of this Certificate,
calculated using the exact method, is approximately 0.01807556%.

            This Certificate  constitutes a "regular interest" in a "real estate
mortgage  investment  conduit" as those terms are defined in Section  860G(a)(1)
and  Section  860D,  respectively,  of the  Internal  Revenue  Code of 1986,  as
amended.

            Unless this  Certificate  has been  countersigned  by an  authorized
officer of the  Trustee,  by manual  signature,  this  Certificate  shall not be
entitled to any benefit under the Agreement or be valid for any purpose.


<PAGE>



            IN WITNESS  WHEREOF,  the Trustee has caused this  Certificate to be
duly executed as of the date set forth below.

Dated:

                                                First Union National Bank,
                                                   Trustee


                                                By
                                                  ------------------------------
                                                  Authorized Officer

Countersigned:

First Union National Bank,
   Trustee


By
  ------------------------------
  Authorized Officer


<PAGE>

                                   EXHIBIT A-5
                     [FORM OF FACE OF CLASS A-5 CERTIFICATE]

            [UNLESS   THIS   CERTIFICATE   IS   PRESENTED   BY   AN   AUTHORIZED
REPRESENTATIVE  OF THE  DEPOSITORY  TRUST COMPANY TO THE SELLER OR ITS AGENT FOR
REGISTRATION OF TRANSFER,  EXCHANGE OR PAYMENT,  AND ANY  CERTIFICATE  ISSUED IS
REGISTERED  IN THE NAME OF CEDE & CO.  OR SUCH  OTHER  NAME AS  REQUESTED  BY AN
AUTHORIZED  REPRESENTATIVE  OF THE  DEPOSITORY  TRUST COMPANY AND ANY PAYMENT IS
MADE TO CEDE & CO.,  ANY  TRANSFER,  PLEDGE  OR OTHER  USE  HEREOF  FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL  SINCE THE  REGISTERED  OWNER  HEREOF,
CEDE & CO., HAS AN INTEREST HEREIN.]

                        MORTGAGE PASS-THROUGH CERTIFICATE
                            SERIES 1999-16 CLASS A-5

                    evidencing an interest in a pool of fixed
                    interest rate, conventional, monthly pay,
                      fully amortizing, first lien, one- to
                four-family residential mortgage loans, which may
                    include loans secured by shares issued by
                    cooperative housing corporations, sold by

                      NORWEST ASSET SECURITIES CORPORATION
                (Not an interest in or obligation of the Seller)

            THIS  CERTIFICATE DOES NOT EVIDENCE AN OBLIGATION OF, OR AN INTEREST
IN, THE SELLER, THE MASTER SERVICER, THE TRUSTEE OR ANY OF THEIR AFFILIATES, AND
IS NOT INSURED OR GUARANTEED BY THE SELLER, THE MASTER SERVICER,  THE TRUSTEE OR
ANY OF THEIR AFFILIATES, OR BY ANY GOVERNMENT AGENCY OR PRIVATE INSURER.

            DISTRIBUTIONS  IN  REDUCTION  OF  THE  PRINCIPAL   BALANCE  OF  THIS
CERTIFICATE  WILL BE MADE IN THE MANNER  DESCRIBED IN THE POOLING AND  SERVICING
AGREEMENT. ACCORDINGLY, THE OUTSTANDING PRINCIPAL BALANCE OF THIS CERTIFICATE AT
ANY TIME MAY BE LESS THAN THE INITIAL PRINCIPAL BALANCE REPRESENTED HEREBY.

Certificate No.                          Cut-Off Date: May 1, 1999

CUSIP No.:                               First Distribution Date: June 25, 1999

Percentage Interest evidenced            Denomination: $
by this Certificate: %

Final Scheduled Maturity Date:           June 25, 2029


            THIS  CERTIFIES THAT  ___________________________  is the registered
owner of the  Percentage  Interest  evidenced  by this  Certificate  in  monthly
distributions  to the Holders of the Class A-5  Certificates  with  respect to a
Trust Estate consisting of a pool of fixed interest rate, conventional,  monthly
pay, fully  amortizing,  first lien,  one- to four-family  residential  mortgage
loans,  other than the Fixed Retained Yield, if any, with respect  thereto,  and
which may  include  loans  secured  by  shares  issued  by  cooperative  housing
corporations  (the  "Mortgage  Loans"),   formed  by  Norwest  Asset  Securities
Corporation  (hereinafter called the "Seller", which term includes any successor
entity  under the  Agreement  referred to below).  The Trust  Estate was created
pursuant  to a Pooling  and  Servicing  Agreement  dated as of May 28, 1999 (the
"Agreement") among the Seller, Norwest Bank Minnesota,  National Association, as
master  servicer  (the "Master  Servicer")  and First Union  National  Bank,  as
trustee (the  "Trustee"),  a summary of certain of the  pertinent  provisions of
which  is  set  forth  hereinafter.  To  the  extent  not  defined  herein,  the
capitalized  terms used herein have the  meanings  ascribed to such terms in the
Agreement.  This  Certificate  is issued  under  and is  subject  to the  terms,
provisions  and conditions of the  Agreement,  to which  Agreement the Holder of
this  Certificate by virtue of the  acceptance  hereof assents and by which such
Holder is bound.

            Pursuant to the terms of the Agreement,  a distribution will be made
on the 25th day of each  month or, if such 25th day is not a Business  Day,  the
Business Day immediately following (the "Distribution Date"),  commencing on the
first  Distribution  Date  specified  above,  to the  Person in whose  name this
Certificate  is  registered at the close of business on the last Business Day of
the month  preceding the month of such  distribution,  in an amount equal to the
product of the Percentage Interest evidenced by this Certificate and the Class A
Distribution Amount for the Class A-5 Certificates required to be distributed to
Holders of the Class A-5  Certificates  on such  Distribution  Date,  subject to
adjustment in certain  events as specified in the  Agreement.  Distributions  in
reduction of the Principal  Balance of certain  Classes of Class A  Certificates
may not commence on the first  Distribution Date specified above.  Distributions
of principal  will be  allocated  among the Classes of Class A  Certificates  in
accordance with the provisions of the Agreement.  The  pass-through  rate on the
Class A-5 Certificates  applicable to each  Distribution Date will be a floating
rate  of  interest  determined  as  provided  herein  and  as  specified  in the
Agreement.  The  pass-through  rate applicable with respect to the  Distribution
Date in June 1999 will be 5.235% per  annum.  Thereafter,  with  respect to each
Distribution  Date,  the  pass-through  rate will be a per annum  rate  equal to
0.300% plus LIBOR as determined on the second business day prior to the 25th day
of the month preceding the month in which such Distribution Date occurs, subject
to a minimum rate of 0.300% and a maximum rate of 8.000%. The amount of interest
which accrues on this Certificate in any month will be subject to reduction with
respect to any  Non-Supported  Interest  Shortfall  and the interest  portion of
certain Realized Losses allocated to the Class A-5 Certificates, as described in
the Agreement.

            Distributions  on this  Certificate  will be made on  behalf  of the
Trustee  either by the Master  Servicer or by a Paying  Agent  appointed  by the
Master Servicer by check mailed to the address of the Person  entitled  thereto,
as such name and address shall appear on the Certificate  Register,  unless such
Person is entitled to receive payments by wire transfer in immediately available
funds in accordance with the Pooling and Servicing Agreement and such Person has
notified the Master  Servicer  pursuant to the Pooling and  Servicing  Agreement
that such  payments  are to be made by wire  transfer of  immediately  available
funds.  Notwithstanding  the above,  the final  distribution in reduction of the
Principal  Balance  of this  Certificate  will be made  after due  notice of the
pendency of such  distribution and only upon  presentation and surrender of this
Certificate at the office or agency specified by the Trustee for that purpose in
the notice of final distribution.

            Reference  is  hereby  made  to  the  further   provisions  of  this
Certificate set forth on the reverse hereof,  which further provisions shall for
all purposes have the same effect as if set forth at this place.

            This Certificate  constitutes a "regular interest" in a "real estate
mortgage  investment  conduit" as those terms are defined in Section  860G(a)(1)
and  Section  860D,  respectively,  of the  Internal  Revenue  Code of 1986,  as
amended.

            Unless this  Certificate  has been  countersigned  by an  authorized
officer of the  Trustee,  by manual  signature,  this  Certificate  shall not be
entitled to any benefit under the Agreement or be valid for any purpose.


<PAGE>



            IN WITNESS  WHEREOF,  the Trustee has caused this  Certificate to be
duly executed as of the date set forth below.

Dated:

                                                First Union National Bank,
                                                   Trustee


                                                By
                                                  ------------------------------
                                                  Authorized Officer

Countersigned:

First Union National Bank,
   Trustee


By
  ------------------------------
  Authorized Officer


<PAGE>

                                   EXHIBIT A-6
                     [FORM OF FACE OF CLASS A-6 CERTIFICATE]

                        MORTGAGE PASS-THROUGH CERTIFICATE
                            SERIES 1999-16 CLASS A-6

                    evidencing an interest in a pool of fixed
                    interest rate, conventional, monthly pay,
                      fully amortizing, first lien, one- to
                four-family residential mortgage loans, which may
                    include loans secured by shares issued by
                    cooperative housing corporations, sold by

                      NORWEST ASSET SECURITIES CORPORATION
                (Not an interest in or obligation of the Seller)

            THIS  CERTIFICATE DOES NOT EVIDENCE AN OBLIGATION OF, OR AN INTEREST
IN, THE SELLER, THE MASTER SERVICER, THE TRUSTEE OR ANY OF THEIR AFFILIATES, AND
IS NOT INSURED OR GUARANTEED BY THE SELLER, THE MASTER SERVICER,  THE TRUSTEE OR
ANY OF THEIR AFFILIATES, OR BY ANY GOVERNMENT AGENCY OR PRIVATE INSURER.

            THE  NOTIONAL  AMOUNT OF THIS  CERTIFICATE  WILL BE  REDUCED  IN THE
MANNER  DESCRIBED  IN THE  POOLING AND  SERVICING  AGREEMENT.  ACCORDINGLY,  THE
OUTSTANDING NOTIONAL AMOUNT OF THIS CERTIFICATE AT ANY TIME MAY BE LESS THAN THE
INITIAL NOTIONAL AMOUNT REPRESENTED HEREBY.

Certificate No.                     Cut-Off Date: May 1, 1999

CUSIP No.:                          First Distribution Date: June 25, 1999

Percentage Interest evidenced       Denomination: $ (Initial Class A-6 Notional
by this Certificate: %                               Amount)

Final Scheduled Maturity Date:      June 25, 2029


<PAGE>



            THIS  CERTIFIES THAT  ___________________________  is the registered
owner of the  Percentage  Interest  evidenced  by this  Certificate  in  monthly
distributions  to the Holders of the Class A-6  Certificates  with  respect to a
Trust Estate consisting of a pool of fixed interest rate, conventional,  monthly
pay, fully  amortizing,  first lien,  one- to four-family  residential  mortgage
loans,  other than the Fixed Retained Yield, if any, with respect  thereto,  and
which may  include  loans  secured  by  shares  issued  by  cooperative  housing
corporations  (the  "Mortgage  Loans"),   formed  by  Norwest  Asset  Securities
Corporation  (hereinafter called the "Seller", which term includes any successor
entity  under the  Agreement  referred to below).  The Trust  Estate was created
pursuant  to a Pooling  and  Servicing  Agreement  dated as of May 28, 1999 (the
"Agreement") among the Seller, Norwest Bank Minnesota,  National Association, as
master  servicer  (the "Master  Servicer")  and First Union  National  Bank,  as
trustee (the  "Trustee"),  a summary of certain of the  pertinent  provisions of
which  is  set  forth  hereinafter.  To  the  extent  not  defined  herein,  the
capitalized  terms used herein have the  meanings  ascribed to such terms in the
Agreement.  This  Certificate  is issued  under  and is  subject  to the  terms,
provisions  and conditions of the  Agreement,  to which  Agreement the Holder of
this  Certificate by virtue of the  acceptance  hereof assents and by which such
Holder is bound.

            Pursuant to the terms of the Agreement,  a distribution will be made
on the 25th day of each  month or, if such 25th day is not a Business  Day,  the
Business Day immediately following (the "Distribution Date"),  commencing on the
first  Distribution  Date  specified  above,  to the  Person in whose  name this
Certificate  is  registered at the close of business on the last Business Day of
the month  preceding the month of such  distribution,  in an amount equal to the
product of the Percentage Interest evidenced by this Certificate and the Class A
Distribution Amount for the Class A-6 Certificates required to be distributed to
Holders of the Class A-6  Certificates  on such  Distribution  Date,  subject to
adjustment  in  certain  events as  specified  in the  Agreement.  The Class A-6
Certificates  are not entitled to  distributions  in respect of  principal.  The
pass-through rate on the Class A-6 Certificates  applicable to each Distribution
Date will be a floating rate of interest  determined  as provided  herein and as
specified in the Agreement. The pass-through rate applicable with respect to the
Distribution  Date in June 1999  will be  2.765%  per  annum.  Thereafter,  with
respect to each  Distribution  Date, the  pass-through  rate will be a per annum
rate equal to (i) 7.700% minus (ii) LIBOR,  as determined on the second business
day  prior  to the 25th  day of the  month  preceding  the  month in which  such
Distribution Date occurs, subject to a minimum rate of 0.000% and a maximum rate
of 7.700%. The amount of interest which accrues on this Certificate in any month
will  be  subject  to  reduction  with  respect  to any  Non-Supported  Interest
Shortfall and the interest  portion of certain  Realized Losses allocated to the
Class A-6 Certificates, as described in the Agreement.

            Distributions  on this  Certificate  will be made on  behalf  of the
Trustee  either by the Master  Servicer or by a Paying  Agent  appointed  by the
Master Servicer by check mailed to the address of the Person  entitled  thereto,
as such name and address shall appear on the Certificate  Register,  unless such
Person is entitled to receive payments by wire transfer in immediately available
funds in accordance with the Pooling and Servicing Agreement and such Person has
notified the Master  Servicer  pursuant to the Pooling and  Servicing  Agreement
that such  payments  are to be made by wire  transfer of  immediately  available
funds.  Notwithstanding  the above,  the final  distribution on this Certificate
will be made after due notice of the pendency of such distribution and only upon
presentation and surrender of this Certificate at the office or agency specified
by the Trustee for that purpose in the notice of final distribution.

            Reference  is  hereby  made  to  the  further   provisions  of  this
Certificate set forth on the reverse hereof,  which further provisions shall for
all purposes have the same effect as if set forth at this place.

            This  Certificate  is issued on May 28,  1999,  at an issue price of
6.24179% of the initial Class A-6 Notional Amount,  including  accrued interest,
and a stated  redemption  price at maturity equal to all interest  distributions
hereon,  and is issued with original issue  discount  ("OID") for federal income
tax  purposes.  Assuming  (a) that  this  Certificate  pays in  accordance  with
projected  cash  flows  reflecting  the  prepayment  assumption  of 275% SPA (as
defined in the  Prospectus  Supplement  dated May 21,  1999 with  respect to the
offering of the Class A Certificates (except the Class A-PO Certificates), Class
B-1, Class B-2 and Class B-3  Certificates)  used to price this  Certificate and
(b)  that  the  interest  rate  at  which  distributions  of  interest  on  this
Certificate  actually will be made will be determined as though the pass-through
rate on this  Certificate  applicable  to the first  Distribution  Date will not
change  thereafter:  (i) the amount of OID as a percentage  of the initial Class
A-6  Notional  Amount is  approximately  5.25700011%;  (ii) the annual  yield to
maturity of this Certificate,  compounded monthly, is approximately  30.90%; and
(iii) the amount of OID  allocable  to the short first  accrual  period (May 28,
1999 to June 25, 1999) as a percentage of the initial Class A-6 Notional Amount,
calculated using the exact method, is approximately 0.14447334%.

            This Certificate  constitutes a "regular interest" in a "real estate
mortgage  investment  conduit" as those terms are defined in Section  860G(a)(1)
and  Section  860D,  respectively,  of the  Internal  Revenue  Code of 1986,  as
amended.

            Unless this  Certificate  has been  countersigned  by an  authorized
officer of the  Trustee,  by manual  signature,  this  Certificate  shall not be
entitled to any benefit under the Agreement or be valid for any purpose.


<PAGE>



            IN WITNESS  WHEREOF,  the Trustee has caused this  Certificate to be
duly executed as of the date set forth below.

Dated:

                                                First Union National Bank,
                                                   Trustee


                                                By
                                                  ------------------------------
                                                  Authorized Officer

Countersigned:

First Union National Bank,
   Trustee


By
  ------------------------------
  Authorized Officer


<PAGE>

                                   EXHIBIT A-7
                     [FORM OF FACE OF CLASS A-7 CERTIFICATE]

            [UNLESS   THIS   CERTIFICATE   IS   PRESENTED   BY   AN   AUTHORIZED
REPRESENTATIVE  OF THE  DEPOSITORY  TRUST COMPANY TO THE SELLER OR ITS AGENT FOR
REGISTRATION OF TRANSFER,  EXCHANGE OR PAYMENT,  AND ANY  CERTIFICATE  ISSUED IS
REGISTERED  IN THE NAME OF CEDE & CO.  OR SUCH  OTHER  NAME AS  REQUESTED  BY AN
AUTHORIZED  REPRESENTATIVE  OF THE  DEPOSITORY  TRUST COMPANY AND ANY PAYMENT IS
MADE TO CEDE & CO.,  ANY  TRANSFER,  PLEDGE  OR OTHER  USE  HEREOF  FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL  SINCE THE  REGISTERED  OWNER  HEREOF,
CEDE & CO., HAS AN INTEREST HEREIN.]

                        MORTGAGE PASS-THROUGH CERTIFICATE
                            SERIES 1999-16 CLASS A-7

                    evidencing an interest in a pool of fixed
                    interest rate, conventional, monthly pay,
                      fully amortizing, first lien, one- to
                four-family residential mortgage loans, which may
                    include loans secured by shares issued by
                    cooperative housing corporations, sold by

                      NORWEST ASSET SECURITIES CORPORATION
                (Not an interest in or obligation of the Seller)

            THIS  CERTIFICATE DOES NOT EVIDENCE AN OBLIGATION OF, OR AN INTEREST
IN, THE SELLER, THE MASTER SERVICER, THE TRUSTEE OR ANY OF THEIR AFFILIATES, AND
IS NOT INSURED OR GUARANTEED BY THE SELLER, THE MASTER SERVICER,  THE TRUSTEE OR
ANY OF THEIR AFFILIATES, OR BY ANY GOVERNMENT AGENCY OR PRIVATE INSURER.

            DISTRIBUTIONS  IN  REDUCTION  OF  THE  PRINCIPAL   BALANCE  OF  THIS
CERTIFICATE  WILL BE MADE IN THE MANNER  DESCRIBED IN THE POOLING AND  SERVICING
AGREEMENT. ACCORDINGLY, THE OUTSTANDING PRINCIPAL BALANCE OF THIS CERTIFICATE AT
ANY TIME MAY BE LESS THAN THE INITIAL PRINCIPAL BALANCE REPRESENTED HEREBY.

Certificate No.                          Cut-Off Date: May 1, 1999

CUSIP No.:                               First Distribution Date: June 25, 1999

Percentage Interest evidenced            Denomination: $
by this Certificate: %

Final Scheduled Maturity Date:           June 25, 2029


            THIS  CERTIFIES THAT  ___________________________  is the registered
owner of the  Percentage  Interest  evidenced  by this  Certificate  in  monthly
distributions  to the Holders of the Class A-7  Certificates  with  respect to a
Trust Estate consisting of a pool of fixed interest rate, conventional,  monthly
pay, fully  amortizing,  first lien,  one- to four-family  residential  mortgage
loans,  other than the Fixed Retained Yield, if any, with respect  thereto,  and
which may  include  loans  secured  by  shares  issued  by  cooperative  housing
corporations  (the  "Mortgage  Loans"),   formed  by  Norwest  Asset  Securities
Corporation  (hereinafter called the "Seller", which term includes any successor
entity  under the  Agreement  referred to below).  The Trust  Estate was created
pursuant  to a Pooling  and  Servicing  Agreement  dated as of May 28, 1999 (the
"Agreement") among the Seller, Norwest Bank Minnesota,  National Association, as
master  servicer  (the "Master  Servicer")  and First Union  National  Bank,  as
trustee (the  "Trustee"),  a summary of certain of the  pertinent  provisions of
which  is  set  forth  hereinafter.  To  the  extent  not  defined  herein,  the
capitalized  terms used herein have the  meanings  ascribed to such terms in the
Agreement.  This  Certificate  is issued  under  and is  subject  to the  terms,
provisions  and conditions of the  Agreement,  to which  Agreement the Holder of
this  Certificate by virtue of the  acceptance  hereof assents and by which such
Holder is bound.

            Pursuant to the terms of the Agreement,  a distribution will be made
on the 25th day of each  month or, if such 25th day is not a Business  Day,  the
Business Day immediately following (the "Distribution Date"),  commencing on the
first  Distribution  Date  specified  above,  to the  Person in whose  name this
Certificate  is  registered at the close of business on the last Business Day of
the month  preceding the month of such  distribution,  in an amount equal to the
product of the Percentage Interest evidenced by this Certificate and the Class A
Distribution Amount for the Class A-7 Certificates required to be distributed to
Holders of the Class A-7  Certificates  on such  Distribution  Date,  subject to
adjustment in certain  events as specified in the  Agreement.  Distributions  in
reduction of the Principal  Balance of certain  Classes of Class A  Certificates
may not commence on the first  Distribution Date specified above.  Distributions
of principal  will be  allocated  among the Classes of Class A  Certificates  in
accordance with the provisions of the Agreement.  The  pass-through  rate on the
Class A-7 Certificates  applicable to each  Distribution Date will be 6.400% per
annum.  The amount of interest  which accrues on this  Certificate  in any month
will  be  subject  to  reduction  with  respect  to any  Non-Supported  Interest
Shortfall and the interest  portion of certain  Realized Losses allocated to the
Class A-7 Certificates, as described in the Agreement.

            Distributions  on this  Certificate  will be made on  behalf  of the
Trustee  either by the Master  Servicer or by a Paying  Agent  appointed  by the
Master Servicer by check mailed to the address of the Person  entitled  thereto,
as such name and address shall appear on the Certificate  Register,  unless such
Person is entitled to receive payments by wire transfer in immediately available
funds in accordance with the Pooling and Servicing Agreement and such Person has
notified the Master  Servicer  pursuant to the Pooling and  Servicing  Agreement
that such  payments  are to be made by wire  transfer of  immediately  available
funds.  Notwithstanding  the above,  the final  distribution in reduction of the
Principal  Balance  of this  Certificate  will be made  after due  notice of the
pendency of such  distribution and only upon  presentation and surrender of this
Certificate at the office or agency specified by the Trustee for that purpose in
the notice of final distribution.

            Reference  is  hereby  made  to  the  further   provisions  of  this
Certificate set forth on the reverse hereof,  which further provisions shall for
all purposes have the same effect as if set forth at this place.

            This  Certificate  is issued on May 28, 1999, and based on its issue
price of 98.29250%, including accrued interest, and a stated redemption price at
maturity equal to its initial  principal balance (plus 3 days of interest at the
pass-through  rate hereon),  is issued with original issue discount  ("OID") for
federal income tax purposes.  Assuming that this  Certificate pays in accordance
with projected cash flows  reflecting the prepayment  assumption of 275% SPA (as
defined in the  Prospectus  Supplement  dated May 21,  1999 with  respect to the
offering of the Class A Certificates (except the Class A-PO Certificates), Class
B-1, Class B-2 and Class B-3 Certificates)  used to price this Certificate:  (i)
the  amount of OID as a  percentage  of the  initial  principal  balance of this
Certificate is approximately  1.76083333%;  (ii) the annual yield to maturity of
this  Certificate,  compounded  monthly,  is approximately  6.88%; and (iii) the
amount of OID allocable to the short first accrual  period (May 28, 1999 to June
25, 1999) as a percentage of the initial  principal balance of this Certificate,
calculated using the exact method, is approximately 0.02677904%.

            This Certificate  constitutes a "regular interest" in a "real estate
mortgage  investment  conduit" as those terms are defined in Section  860G(a)(1)
and  Section  860D,  respectively,  of the  Internal  Revenue  Code of 1986,  as
amended.

            Unless this  Certificate  has been  countersigned  by an  authorized
officer of the  Trustee,  by manual  signature,  this  Certificate  shall not be
entitled to any benefit under the Agreement or be valid for any purpose.


<PAGE>



            IN WITNESS  WHEREOF,  the Trustee has caused this  Certificate to be
duly executed as of the date set forth below.

Dated:

                                                First Union National Bank,
                                                   Trustee


                                                By
                                                  ------------------------------
                                                  Authorized Officer

Countersigned:

First Union National Bank,
   Trustee


By
  ------------------------------
  Authorized Officer


<PAGE>

                                   EXHIBIT A-8
                     [FORM OF FACE OF CLASS A-8 CERTIFICATE]

            [UNLESS   THIS   CERTIFICATE   IS   PRESENTED   BY   AN   AUTHORIZED
REPRESENTATIVE  OF THE  DEPOSITORY  TRUST COMPANY TO THE SELLER OR ITS AGENT FOR
REGISTRATION OF TRANSFER,  EXCHANGE OR PAYMENT,  AND ANY  CERTIFICATE  ISSUED IS
REGISTERED  IN THE NAME OF CEDE & CO.  OR SUCH  OTHER  NAME AS  REQUESTED  BY AN
AUTHORIZED  REPRESENTATIVE  OF THE  DEPOSITORY  TRUST COMPANY AND ANY PAYMENT IS
MADE TO CEDE & CO.,  ANY  TRANSFER,  PLEDGE  OR OTHER  USE  HEREOF  FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL  SINCE THE  REGISTERED  OWNER  HEREOF,
CEDE & CO., HAS AN INTEREST HEREIN.]

                        MORTGAGE PASS-THROUGH CERTIFICATE
                            SERIES 1999-16 CLASS A-8

                    evidencing an interest in a pool of fixed
                    interest rate, conventional, monthly pay,
                      fully amortizing, first lien, one- to
                four-family residential mortgage loans, which may
                    include loans secured by shares issued by
                    cooperative housing corporations, sold by

                      NORWEST ASSET SECURITIES CORPORATION
                (Not an interest in or obligation of the Seller)

            THIS  CERTIFICATE DOES NOT EVIDENCE AN OBLIGATION OF, OR AN INTEREST
IN, THE SELLER, THE MASTER SERVICER, THE TRUSTEE OR ANY OF THEIR AFFILIATES, AND
IS NOT INSURED OR GUARANTEED BY THE SELLER, THE MASTER SERVICER,  THE TRUSTEE OR
ANY OF THEIR AFFILIATES, OR BY ANY GOVERNMENT AGENCY OR PRIVATE INSURER.

            DISTRIBUTIONS  IN  REDUCTION  OF  THE  PRINCIPAL   BALANCE  OF  THIS
CERTIFICATE  WILL BE MADE IN THE MANNER  DESCRIBED IN THE POOLING AND  SERVICING
AGREEMENT. ACCORDINGLY, THE OUTSTANDING PRINCIPAL BALANCE OF THIS CERTIFICATE AT
ANY TIME MAY BE LESS THAN THE INITIAL PRINCIPAL BALANCE REPRESENTED HEREBY.

Certificate No.                           Cut-Off Date: May 1, 1999

CUSIP No.:                                First Distribution Date: June 25, 1999

Percentage Interest evidenced             Denomination: $
by this Certificate: %

Final Scheduled Maturity Date:            June 25, 2029


            THIS  CERTIFIES THAT  ___________________________  is the registered
owner of the  Percentage  Interest  evidenced  by this  Certificate  in  monthly
distributions  to the Holders of the Class A-8  Certificates  with  respect to a
Trust Estate consisting of a pool of fixed interest rate, conventional,  monthly
pay, fully  amortizing,  first lien,  one- to four-family  residential  mortgage
loans,  other than the Fixed Retained Yield, if any, with respect  thereto,  and
which may  include  loans  secured  by  shares  issued  by  cooperative  housing
corporations  (the  "Mortgage  Loans"),   formed  by  Norwest  Asset  Securities
Corporation  (hereinafter called the "Seller", which term includes any successor
entity  under the  Agreement  referred to below).  The Trust  Estate was created
pursuant  to a Pooling  and  Servicing  Agreement  dated as of May 28, 1999 (the
"Agreement") among the Seller, Norwest Bank Minnesota,  National Association, as
master  servicer  (the "Master  Servicer")  and First Union  National  Bank,  as
trustee (the  "Trustee"),  a summary of certain of the  pertinent  provisions of
which  is  set  forth  hereinafter.  To  the  extent  not  defined  herein,  the
capitalized  terms used herein have the  meanings  ascribed to such terms in the
Agreement.  This  Certificate  is issued  under  and is  subject  to the  terms,
provisions  and conditions of the  Agreement,  to which  Agreement the Holder of
this  Certificate by virtue of the  acceptance  hereof assents and by which such
Holder is bound.

            Pursuant to the terms of the Agreement,  a distribution will be made
on the 25th day of each  month or, if such 25th day is not a Business  Day,  the
Business Day immediately following (the "Distribution Date"),  commencing on the
first  Distribution  Date  specified  above,  to the  Person in whose  name this
Certificate  is  registered at the close of business on the last Business Day of
the month  preceding the month of such  distribution,  in an amount equal to the
product of the Percentage Interest evidenced by this Certificate and the Class A
Distribution Amount for the Class A-8 Certificates required to be distributed to
Holders of the Class A-8  Certificates  on such  Distribution  Date,  subject to
adjustment in certain  events as specified in the  Agreement.  Distributions  in
reduction of the Principal  Balance of certain  Classes of Class A  Certificates
may not commence on the first  Distribution Date specified above.  Distributions
of principal  will be  allocated  among the Classes of Class A  Certificates  in
accordance with the provisions of the Agreement.  The  pass-through  rate on the
Class A-8 Certificates  applicable to each  Distribution Date will be 6.000% per
annum.  The amount of interest  which accrues on this  Certificate  in any month
will  be  subject  to  reduction  with  respect  to any  Non-Supported  Interest
Shortfall and the interest  portion of certain  Realized Losses allocated to the
Class A-8 Certificates, as described in the Agreement.

            Distributions  on this  Certificate  will be made on  behalf  of the
Trustee  either by the Master  Servicer or by a Paying  Agent  appointed  by the
Master Servicer by check mailed to the address of the Person  entitled  thereto,
as such name and address shall appear on the Certificate  Register,  unless such
Person is entitled to receive payments by wire transfer in immediately available
funds in accordance with the Pooling and Servicing Agreement and such Person has
notified the Master  Servicer  pursuant to the Pooling and  Servicing  Agreement
that such  payments  are to be made by wire  transfer of  immediately  available
funds.  Notwithstanding  the above,  the final  distribution in reduction of the
Principal  Balance  of this  Certificate  will be made  after due  notice of the
pendency of such  distribution and only upon  presentation and surrender of this
Certificate at the office or agency specified by the Trustee for that purpose in
the notice of final distribution.

            Reference  is  hereby  made  to  the  further   provisions  of  this
Certificate set forth on the reverse hereof,  which further provisions shall for
all purposes have the same effect as if set forth at this place.

            This  Certificate  is issued on May 28, 1999, and based on its issue
price of 92.45000%, including accrued interest, and a stated redemption price at
maturity equal to its initial  principal balance (plus 3 days of interest at the
pass-through  rate hereon),  is issued with original issue discount  ("OID") for
federal income tax purposes.  Assuming that this  Certificate pays in accordance
with projected cash flows  reflecting the prepayment  assumption of 275% SPA (as
defined in the  Prospectus  Supplement  dated May 21,  1999 with  respect to the
offering of the Class A Certificates (except the Class A-PO Certificates), Class
B-1, Class B-2 and Class B-3 Certificates)  used to price this Certificate:  (i)
the  amount of OID as a  percentage  of the  initial  principal  balance of this
Certificate is approximately  7.60000000%;  (ii) the annual yield to maturity of
this  Certificate,  compounded  monthly,  is approximately  7.03%; and (iii) the
amount of OID allocable to the short first accrual  period (May 28, 1999 to June
25, 1999) as a percentage of the initial  principal balance of this Certificate,
calculated using the exact method, is approximately 0.03756392%.

            This Certificate  constitutes a "regular interest" in a "real estate
mortgage  investment  conduit" as those terms are defined in Section  860G(a)(1)
and  Section  860D,  respectively,  of the  Internal  Revenue  Code of 1986,  as
amended.

            Unless this  Certificate  has been  countersigned  by an  authorized
officer of the  Trustee,  by manual  signature,  this  Certificate  shall not be
entitled to any benefit under the Agreement or be valid for any purpose.


<PAGE>



            IN WITNESS  WHEREOF,  the Trustee has caused this  Certificate to be
duly executed as of the date set forth below.

Dated:

                                                First Union National Bank,
                                                   Trustee


                                                By
                                                  ------------------------------
                                                  Authorized Officer

Countersigned:

First Union National Bank,
   Trustee


By
  ------------------------------
  Authorized Officer


<PAGE>

                                   EXHIBIT A-9
                     [FORM OF FACE OF CLASS A-9 CERTIFICATE]

            [UNLESS   THIS   CERTIFICATE   IS   PRESENTED   BY   AN   AUTHORIZED
REPRESENTATIVE  OF THE  DEPOSITORY  TRUST COMPANY TO THE SELLER OR ITS AGENT FOR
REGISTRATION OF TRANSFER,  EXCHANGE OR PAYMENT,  AND ANY  CERTIFICATE  ISSUED IS
REGISTERED  IN THE NAME OF CEDE & CO.  OR SUCH  OTHER  NAME AS  REQUESTED  BY AN
AUTHORIZED  REPRESENTATIVE  OF THE  DEPOSITORY  TRUST COMPANY AND ANY PAYMENT IS
MADE TO CEDE & CO.,  ANY  TRANSFER,  PLEDGE  OR OTHER  USE  HEREOF  FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL  SINCE THE  REGISTERED  OWNER  HEREOF,
CEDE & CO., HAS AN INTEREST HEREIN.]

                        MORTGAGE PASS-THROUGH CERTIFICATE
                            SERIES 1999-16 CLASS A-9

                    evidencing an interest in a pool of fixed
                    interest rate, conventional, monthly pay,
                      fully amortizing, first lien, one- to
                four-family residential mortgage loans, which may
                    include loans secured by shares issued by
                    cooperative housing corporations, sold by

                      NORWEST ASSET SECURITIES CORPORATION
                (Not an interest in or obligation of the Seller)

            THIS  CERTIFICATE DOES NOT EVIDENCE AN OBLIGATION OF, OR AN INTEREST
IN, THE SELLER, THE MASTER SERVICER, THE TRUSTEE OR ANY OF THEIR AFFILIATES, AND
IS NOT INSURED OR GUARANTEED BY THE SELLER, THE MASTER SERVICER,  THE TRUSTEE OR
ANY OF THEIR AFFILIATES, OR BY ANY GOVERNMENT AGENCY OR PRIVATE INSURER.

            DISTRIBUTIONS  IN  REDUCTION  OF  THE  PRINCIPAL   BALANCE  OF  THIS
CERTIFICATE  WILL BE MADE IN THE MANNER  DESCRIBED IN THE POOLING AND  SERVICING
AGREEMENT. ACCORDINGLY, THE OUTSTANDING PRINCIPAL BALANCE OF THIS CERTIFICATE AT
ANY TIME MAY BE LESS THAN THE INITIAL PRINCIPAL BALANCE REPRESENTED HEREBY.

Certificate No.                           Cut-Off Date: May 1, 1999

CUSIP No.:                                First Distribution Date: June 25, 1999

Percentage Interest evidenced             Denomination: $
by this Certificate: %

Final Scheduled Maturity Date:            June 25, 2029


            THIS  CERTIFIES THAT  ___________________________  is the registered
owner of the  Percentage  Interest  evidenced  by this  Certificate  in  monthly
distributions  to the Holders of the Class A-9  Certificates  with  respect to a
Trust Estate consisting of a pool of fixed interest rate, conventional,  monthly
pay, fully  amortizing,  first lien,  one- to four-family  residential  mortgage
loans,  other than the Fixed Retained Yield, if any, with respect  thereto,  and
which may  include  loans  secured  by  shares  issued  by  cooperative  housing
corporations  (the  "Mortgage  Loans"),   formed  by  Norwest  Asset  Securities
Corporation  (hereinafter called the "Seller", which term includes any successor
entity  under the  Agreement  referred to below).  The Trust  Estate was created
pursuant  to a Pooling  and  Servicing  Agreement  dated as of May 28, 1999 (the
"Agreement") among the Seller, Norwest Bank Minnesota,  National Association, as
master  servicer  (the "Master  Servicer")  and First Union  National  Bank,  as
trustee (the  "Trustee"),  a summary of certain of the  pertinent  provisions of
which  is  set  forth  hereinafter.  To  the  extent  not  defined  herein,  the
capitalized  terms used herein have the  meanings  ascribed to such terms in the
Agreement.  This  Certificate  is issued  under  and is  subject  to the  terms,
provisions  and conditions of the  Agreement,  to which  Agreement the Holder of
this  Certificate by virtue of the  acceptance  hereof assents and by which such
Holder is bound.

            Pursuant to the terms of the Agreement,  a distribution will be made
on the 25th day of each  month or, if such 25th day is not a Business  Day,  the
Business Day immediately following (the "Distribution Date"),  commencing on the
first  Distribution  Date  specified  above,  to the  Person in whose  name this
Certificate  is  registered at the close of business on the last Business Day of
the month  preceding the month of such  distribution,  in an amount equal to the
product of the Percentage Interest evidenced by this Certificate and the Class A
Distribution Amount for the Class A-9 Certificates required to be distributed to
Holders of the Class A-9  Certificates  on such  Distribution  Date,  subject to
adjustment in certain  events as specified in the  Agreement.  Distributions  in
reduction of the Principal  Balance of certain  Classes of Class A  Certificates
may not commence on the first  Distribution Date specified above.  Distributions
of principal  will be  allocated  among the Classes of Class A  Certificates  in
accordance with the provisions of the Agreement.  The  pass-through  rate on the
Class A-9 Certificates  applicable to each  Distribution Date will be 7.000% per
annum.  The amount of interest  which accrues on this  Certificate  in any month
will  be  subject  to  reduction  with  respect  to any  Non-Supported  Interest
Shortfall and the interest  portion of certain  Realized Losses allocated to the
Class A-9 Certificates, as described in the Agreement.

            Distributions  on this  Certificate  will be made on  behalf  of the
Trustee  either by the Master  Servicer or by a Paying  Agent  appointed  by the
Master Servicer by check mailed to the address of the Person  entitled  thereto,
as such name and address shall appear on the Certificate  Register,  unless such
Person is entitled to receive payments by wire transfer in immediately available
funds in accordance with the Pooling and Servicing Agreement and such Person has
notified the Master  Servicer  pursuant to the Pooling and  Servicing  Agreement
that such  payments  are to be made by wire  transfer of  immediately  available
funds.  Notwithstanding  the above,  the final  distribution in reduction of the
Principal  Balance  of this  Certificate  will be made  after due  notice of the
pendency of such  distribution and only upon  presentation and surrender of this
Certificate at the office or agency specified by the Trustee for that purpose in
the notice of final distribution.

            Reference  is  hereby  made  to  the  further   provisions  of  this
Certificate set forth on the reverse hereof,  which further provisions shall for
all purposes have the same effect as if set forth at this place.

            This Certificate  constitutes a "regular interest" in a "real estate
mortgage  investment  conduit" as those terms are defined in Section  860G(a)(1)
and  Section  860D,  respectively,  of the  Internal  Revenue  Code of 1986,  as
amended.

            Unless this  Certificate  has been  countersigned  by an  authorized
officer of the  Trustee,  by manual  signature,  this  Certificate  shall not be
entitled to any benefit under the Agreement or be valid for any purpose.


<PAGE>



            IN WITNESS  WHEREOF,  the Trustee has caused this  Certificate to be
duly executed as of the date set forth below.

Dated:

                                                First Union National Bank,
                                                   Trustee


                                                By
                                                  ------------------------------
                                                  Authorized Officer

Countersigned:

First Union National Bank,
   Trustee


By
  ------------------------------
  Authorized Officer


<PAGE>

                                  EXHIBIT A-10
                    [FORM OF FACE OF CLASS A-10 CERTIFICATE]

            [UNLESS   THIS   CERTIFICATE   IS   PRESENTED   BY   AN   AUTHORIZED
REPRESENTATIVE  OF THE  DEPOSITORY  TRUST COMPANY TO THE SELLER OR ITS AGENT FOR
REGISTRATION OF TRANSFER,  EXCHANGE OR PAYMENT,  AND ANY  CERTIFICATE  ISSUED IS
REGISTERED  IN THE NAME OF CEDE & CO.  OR SUCH  OTHER  NAME AS  REQUESTED  BY AN
AUTHORIZED  REPRESENTATIVE  OF THE  DEPOSITORY  TRUST COMPANY AND ANY PAYMENT IS
MADE TO CEDE & CO.,  ANY  TRANSFER,  PLEDGE  OR OTHER  USE  HEREOF  FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL  SINCE THE  REGISTERED  OWNER  HEREOF,
CEDE & CO., HAS AN INTEREST HEREIN.]

                        MORTGAGE PASS-THROUGH CERTIFICATE
                            SERIES 1999-16 CLASS A-10

                    evidencing an interest in a pool of fixed
                    interest rate, conventional, monthly pay,
                      fully amortizing, first lien, one- to
                four-family residential mortgage loans, which may
                    include loans secured by shares issued by
                    cooperative housing corporations, sold by

                      NORWEST ASSET SECURITIES CORPORATION
                (Not an interest in or obligation of the Seller)

            THIS  CERTIFICATE DOES NOT EVIDENCE AN OBLIGATION OF, OR AN INTEREST
IN, THE SELLER, THE MASTER SERVICER, THE TRUSTEE OR ANY OF THEIR AFFILIATES, AND
IS NOT INSURED OR GUARANTEED BY THE SELLER, THE MASTER SERVICER,  THE TRUSTEE OR
ANY OF THEIR AFFILIATES, OR BY ANY GOVERNMENT AGENCY OR PRIVATE INSURER.

            DISTRIBUTIONS  IN  REDUCTION  OF  THE  PRINCIPAL   BALANCE  OF  THIS
CERTIFICATE  WILL BE MADE IN THE MANNER  DESCRIBED IN THE POOLING AND  SERVICING
AGREEMENT. ACCORDINGLY, THE OUTSTANDING PRINCIPAL BALANCE OF THIS CERTIFICATE AT
ANY TIME MAY BE LESS THAN THE INITIAL PRINCIPAL BALANCE REPRESENTED HEREBY.

Certificate No.                           Cut-Off Date: May 1, 1999

CUSIP No.:                                First Distribution Date: June 25, 1999

Percentage Interest evidenced             Denomination: $
by this Certificate: %

Final Scheduled Maturity Date:            June 25, 2029


            THIS  CERTIFIES THAT  ___________________________  is the registered
owner of the  Percentage  Interest  evidenced  by this  Certificate  in  monthly
distributions  to the Holders of the Class A-10  Certificates  with respect to a
Trust Estate consisting of a pool of fixed interest rate, conventional,  monthly
pay, fully  amortizing,  first lien,  one- to four-family  residential  mortgage
loans,  other than the Fixed Retained Yield, if any, with respect  thereto,  and
which may  include  loans  secured  by  shares  issued  by  cooperative  housing
corporations  (the  "Mortgage  Loans"),   formed  by  Norwest  Asset  Securities
Corporation  (hereinafter called the "Seller", which term includes any successor
entity  under the  Agreement  referred to below).  The Trust  Estate was created
pursuant  to a Pooling  and  Servicing  Agreement  dated as of May 28, 1999 (the
"Agreement") among the Seller, Norwest Bank Minnesota,  National Association, as
master  servicer  (the "Master  Servicer")  and First Union  National  Bank,  as
trustee (the  "Trustee"),  a summary of certain of the  pertinent  provisions of
which  is  set  forth  hereinafter.  To  the  extent  not  defined  herein,  the
capitalized  terms used herein have the  meanings  ascribed to such terms in the
Agreement.  This  Certificate  is issued  under  and is  subject  to the  terms,
provisions  and conditions of the  Agreement,  to which  Agreement the Holder of
this  Certificate by virtue of the  acceptance  hereof assents and by which such
Holder is bound.

            Pursuant to the terms of the Agreement,  a distribution will be made
on the 25th day of each  month or, if such 25th day is not a Business  Day,  the
Business Day immediately following (the "Distribution Date"),  commencing on the
first  Distribution  Date  specified  above,  to the  Person in whose  name this
Certificate  is  registered at the close of business on the last Business Day of
the month  preceding the month of such  distribution,  in an amount equal to the
product of the Percentage Interest evidenced by this Certificate and the Class A
Distribution  Amount for the Class A-10 Certificates  required to be distributed
to Holders of the Class A-10 Certificates on such Distribution  Date, subject to
adjustment in certain  events as specified in the  Agreement.  Distributions  in
reduction of the Principal  Balance of certain  Classes of Class A  Certificates
may not commence on the first  Distribution Date specified above.  Distributions
of principal  will be  allocated  among the Classes of Class A  Certificates  in
accordance with the provisions of the Agreement.  The  pass-through  rate on the
Class A-10 Certificates  applicable to each Distribution Date will be 6.750% per
annum.  The amount of interest  which accrues on this  Certificate  in any month
will  be  subject  to  reduction  with  respect  to any  Non-Supported  Interest
Shortfall and the interest  portion of certain  Realized Losses allocated to the
Class A-10 Certificates, as described in the Agreement.

            Distributions  on this  Certificate  will be made on  behalf  of the
Trustee  either by the Master  Servicer or by a Paying  Agent  appointed  by the
Master Servicer by check mailed to the address of the Person  entitled  thereto,
as such name and address shall appear on the Certificate  Register,  unless such
Person is entitled to receive payments by wire transfer in immediately available
funds in accordance with the Pooling and Servicing Agreement and such Person has
notified the Master  Servicer  pursuant to the Pooling and  Servicing  Agreement
that such  payments  are to be made by wire  transfer of  immediately  available
funds.  Notwithstanding  the above,  the final  distribution in reduction of the
Principal  Balance  of this  Certificate  will be made  after due  notice of the
pendency of such  distribution and only upon  presentation and surrender of this
Certificate at the office or agency specified by the Trustee for that purpose in
the notice of final distribution.

            Reference  is  hereby  made  to  the  further   provisions  of  this
Certificate set forth on the reverse hereof,  which further provisions shall for
all purposes have the same effect as if set forth at this place.

            This Certificate  constitutes a "regular interest" in a "real estate
mortgage  investment  conduit" as those terms are defined in Section  860G(a)(1)
and  Section  860D,  respectively,  of the  Internal  Revenue  Code of 1986,  as
amended.

            Unless this  Certificate  has been  countersigned  by an  authorized
officer of the  Trustee,  by manual  signature,  this  Certificate  shall not be
entitled to any benefit under the Agreement or be valid for any purpose.


<PAGE>



            IN WITNESS  WHEREOF,  the Trustee has caused this  Certificate to be
duly executed as of the date set forth below.

Dated:

                                                First Union National Bank,
                                                   Trustee


                                                By
                                                  ------------------------------
                                                  Authorized Officer

Countersigned:

First Union National Bank,
   Trustee


By
  ------------------------------
  Authorized Officer


<PAGE>

                                  EXHIBIT A-11
                    [FORM OF FACE OF CLASS A-11 CERTIFICATE]

            [UNLESS   THIS   CERTIFICATE   IS   PRESENTED   BY   AN   AUTHORIZED
REPRESENTATIVE  OF THE  DEPOSITORY  TRUST COMPANY TO THE SELLER OR ITS AGENT FOR
REGISTRATION OF TRANSFER,  EXCHANGE OR PAYMENT,  AND ANY  CERTIFICATE  ISSUED IS
REGISTERED  IN THE NAME OF CEDE & CO.  OR SUCH  OTHER  NAME AS  REQUESTED  BY AN
AUTHORIZED  REPRESENTATIVE  OF THE  DEPOSITORY  TRUST COMPANY AND ANY PAYMENT IS
MADE TO CEDE & CO.,  ANY  TRANSFER,  PLEDGE  OR OTHER  USE  HEREOF  FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL  SINCE THE  REGISTERED  OWNER  HEREOF,
CEDE & CO., HAS AN INTEREST HEREIN.]

                        MORTGAGE PASS-THROUGH CERTIFICATE
                            SERIES 1999-16 CLASS A-11

                    evidencing an interest in a pool of fixed
                    interest rate, conventional, monthly pay,
                      fully amortizing, first lien, one- to
                four-family residential mortgage loans, which may
                    include loans secured by shares issued by
                    cooperative housing corporations, sold by

                      NORWEST ASSET SECURITIES CORPORATION
                (Not an interest in or obligation of the Seller)

            THIS  CERTIFICATE DOES NOT EVIDENCE AN OBLIGATION OF, OR AN INTEREST
IN, THE SELLER, THE MASTER SERVICER, THE TRUSTEE OR ANY OF THEIR AFFILIATES, AND
IS NOT INSURED OR GUARANTEED BY THE SELLER, THE MASTER SERVICER,  THE TRUSTEE OR
ANY OF THEIR AFFILIATES, OR BY ANY GOVERNMENT AGENCY OR PRIVATE INSURER.

            DISTRIBUTIONS  IN  REDUCTION  OF  THE  PRINCIPAL   BALANCE  OF  THIS
CERTIFICATE  WILL BE MADE IN THE MANNER  DESCRIBED IN THE POOLING AND  SERVICING
AGREEMENT. ACCORDINGLY, THE OUTSTANDING PRINCIPAL BALANCE OF THIS CERTIFICATE AT
ANY TIME MAY BE LESS THAN THE INITIAL PRINCIPAL BALANCE REPRESENTED HEREBY.

Certificate No.                           Cut-Off Date: May 1, 1999

CUSIP No.:                                First Distribution Date: June 25, 1999

Percentage Interest evidenced             Denomination: $
by this Certificate: %

Final Scheduled Maturity Date:            June 25, 2029


            THIS  CERTIFIES THAT  ___________________________  is the registered
owner of the  Percentage  Interest  evidenced  by this  Certificate  in  monthly
distributions  to the Holders of the Class A-11  Certificates  with respect to a
Trust Estate consisting of a pool of fixed interest rate, conventional,  monthly
pay, fully  amortizing,  first lien,  one- to four-family  residential  mortgage
loans,  other than the Fixed Retained Yield, if any, with respect  thereto,  and
which may  include  loans  secured  by  shares  issued  by  cooperative  housing
corporations  (the  "Mortgage  Loans"),   formed  by  Norwest  Asset  Securities
Corporation  (hereinafter called the "Seller", which term includes any successor
entity  under the  Agreement  referred to below).  The Trust  Estate was created
pursuant  to a Pooling  and  Servicing  Agreement  dated as of May 28, 1999 (the
"Agreement") among the Seller, Norwest Bank Minnesota,  National Association, as
master  servicer  (the "Master  Servicer")  and First Union  National  Bank,  as
trustee (the  "Trustee"),  a summary of certain of the  pertinent  provisions of
which  is  set  forth  hereinafter.  To  the  extent  not  defined  herein,  the
capitalized  terms used herein have the  meanings  ascribed to such terms in the
Agreement.  This  Certificate  is issued  under  and is  subject  to the  terms,
provisions  and conditions of the  Agreement,  to which  Agreement the Holder of
this  Certificate by virtue of the  acceptance  hereof assents and by which such
Holder is bound.

            Pursuant to the terms of the Agreement,  a distribution will be made
on the 25th day of each  month or, if such 25th day is not a Business  Day,  the
Business Day immediately following (the "Distribution Date"),  commencing on the
first  Distribution  Date  specified  above,  to the  Person in whose  name this
Certificate  is  registered at the close of business on the last Business Day of
the month  preceding the month of such  distribution,  in an amount equal to the
product of the Percentage Interest evidenced by this Certificate and the Class A
Distribution  Amount for the Class A-11 Certificates  required to be distributed
to Holders of the Class A-11 Certificates on such Distribution  Date, subject to
adjustment in certain  events as specified in the  Agreement.  Distributions  in
reduction of the Principal  Balance of certain  Classes of Class A  Certificates
may not commence on the first  Distribution Date specified above.  Distributions
of principal  will be  allocated  among the Classes of Class A  Certificates  in
accordance with the provisions of the Agreement.  The  pass-through  rate on the
Class A-11 Certificates  applicable to each Distribution Date will be 6.000% per
annum.  The amount of interest  which accrues on this  Certificate  in any month
will  be  subject  to  reduction  with  respect  to any  Non-Supported  Interest
Shortfall and the interest  portion of certain  Realized Losses allocated to the
Class A-11 Certificates, as described in the Agreement.

            Distributions  on this  Certificate  will be made on  behalf  of the
Trustee  either by the Master  Servicer or by a Paying  Agent  appointed  by the
Master Servicer by check mailed to the address of the Person  entitled  thereto,
as such name and address shall appear on the Certificate  Register,  unless such
Person is entitled to receive payments by wire transfer in immediately available
funds in accordance with the Pooling and Servicing Agreement and such Person has
notified the Master  Servicer  pursuant to the Pooling and  Servicing  Agreement
that such  payments  are to be made by wire  transfer of  immediately  available
funds.  Notwithstanding  the above,  the final  distribution in reduction of the
Principal  Balance  of this  Certificate  will be made  after due  notice of the
pendency of such  distribution and only upon  presentation and surrender of this
Certificate at the office or agency specified by the Trustee for that purpose in
the notice of final distribution.

            Reference  is  hereby  made  to  the  further   provisions  of  this
Certificate set forth on the reverse hereof,  which further provisions shall for
all purposes have the same effect as if set forth at this place.

            This Certificate  constitutes a "regular interest" in a "real estate
mortgage  investment  conduit" as those terms are defined in Section  860G(a)(1)
and  Section  860D,  respectively,  of the  Internal  Revenue  Code of 1986,  as
amended.

            Unless this  Certificate  has been  countersigned  by an  authorized
officer of the  Trustee,  by manual  signature,  this  Certificate  shall not be
entitled to any benefit under the Agreement or be valid for any purpose.


<PAGE>



            IN WITNESS  WHEREOF,  the Trustee has caused this  Certificate to be
duly executed as of the date set forth below.

Dated:

                                                First Union National Bank,
                                                   Trustee


                                                By
                                                  ------------------------------
                                                  Authorized Officer

Countersigned:

First Union National Bank,
   Trustee


By
  ------------------------------
  Authorized Officer


<PAGE>

                                  EXHIBIT A-12
                    [FORM OF FACE OF CLASS A-12 CERTIFICATE]

            [UNLESS   THIS   CERTIFICATE   IS   PRESENTED   BY   AN   AUTHORIZED
REPRESENTATIVE  OF THE  DEPOSITORY  TRUST COMPANY TO THE SELLER OR ITS AGENT FOR
REGISTRATION OF TRANSFER,  EXCHANGE OR PAYMENT,  AND ANY  CERTIFICATE  ISSUED IS
REGISTERED  IN THE NAME OF CEDE & CO.  OR SUCH  OTHER  NAME AS  REQUESTED  BY AN
AUTHORIZED  REPRESENTATIVE  OF THE  DEPOSITORY  TRUST COMPANY AND ANY PAYMENT IS
MADE TO CEDE & CO.,  ANY  TRANSFER,  PLEDGE  OR OTHER  USE  HEREOF  FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL  SINCE THE  REGISTERED  OWNER  HEREOF,
CEDE & CO., HAS AN INTEREST HEREIN.]

                        MORTGAGE PASS-THROUGH CERTIFICATE
                            SERIES 1999-16 CLASS A-12

                    evidencing an interest in a pool of fixed
                    interest rate, conventional, monthly pay,
                      fully amortizing, first lien, one- to
                four-family residential mortgage loans, which may
                    include loans secured by shares issued by
                    cooperative housing corporations, sold by

                      NORWEST ASSET SECURITIES CORPORATION
                (Not an interest in or obligation of the Seller)

            THIS  CERTIFICATE DOES NOT EVIDENCE AN OBLIGATION OF, OR AN INTEREST
IN, THE SELLER, THE MASTER SERVICER, THE TRUSTEE OR ANY OF THEIR AFFILIATES, AND
IS NOT INSURED OR GUARANTEED BY THE SELLER, THE MASTER SERVICER,  THE TRUSTEE OR
ANY OF THEIR AFFILIATES, OR BY ANY GOVERNMENT AGENCY OR PRIVATE INSURER.

            UNTIL THE APPLICABLE  ACCRETION  TERMINATION DATE, THE INTEREST THAT
ACCRUES  ON THE  PRINCIPAL  BALANCE  OF THIS  CERTIFICATE  WILL NOT BE  PAYABLE.
BECAUSE  SUCH  UNPAID  INTEREST  IS  ADDED  TO THE  PRINCIPAL  BALANCE  OF  THIS
CERTIFICATE AND BECAUSE DISTRIBUTIONS IN REDUCTION OF THE PRINCIPAL BALANCE WILL
BE MADE IN THE MANNER  DESCRIBED  IN THE  AGREEMENT  (AS  DEFINED  HEREIN),  THE
OUTSTANDING  PRINCIPAL  BALANCE OF THIS  CERTIFICATE  AT ANY TIME MAY BE MORE OR
LESS THAN THE INITIAL PRINCIPAL BALANCE REPRESENTED HEREBY.

Certificate No.                           Cut-Off Date: May 1, 1999

CUSIP No.:                                First Distribution Date: June 25, 1999

Percentage Interest evidenced             Denomination: $
by this Certificate: %

Final Scheduled Maturity Date:            June 25, 2029



<PAGE>

THIS CERTIFIES THAT  ___________________________  is the registered owner of the
Percentage  Interest  evidenced by this Certificate in monthly  distributions to
the  Holders  of the Class A-12  Certificates  with  respect  to a Trust  Estate
consisting of a pool of fixed  interest rate,  conventional,  monthly pay, fully
amortizing,  first lien, one- to four-family  residential  mortgage loans, other
than the Fixed  Retained  Yield,  if any,  with respect  thereto,  and which may
include loans secured by shares issued by cooperative housing  corporations (the
"Mortgage Loans"),  formed by Norwest Asset Securities Corporation  (hereinafter
called  the  "Seller",  which  term  includes  any  successor  entity  under the
Agreement referred to below). The Trust Estate was created pursuant to a Pooling
and Servicing  Agreement  dated as of May 28, 1999 (the  "Agreement")  among the
Seller,  Norwest Bank Minnesota,  National Association,  as master servicer (the
"Master Servicer") and First Union National Bank, as trustee (the "Trustee"),  a
summary  of  certain  of  the  pertinent   provisions  of  which  is  set  forth
hereinafter. To the extent not defined herein, the capitalized terms used herein
have the meanings  ascribed to such terms in the Agreement.  This Certificate is
issued  under and is subject  to the terms,  provisions  and  conditions  of the
Agreement,  to which  Agreement the Holder of this  Certificate by virtue of the
acceptance hereof assents and by which such Holder is bound.

            Pursuant to the terms of the Agreement,  a distribution will be made
on the 25th day of each  month or, if such 25th day is not a Business  Day,  the
Business Day immediately following (the "Distribution Date"),  commencing on the
first  Distribution  Date  specified  above,  to the  Person in whose  name this
Certificate  is  registered at the close of business on the last Business Day of
the month  preceding the month of such  distribution,  in an amount equal to the
product of the Percentage Interest evidenced by this Certificate and the Class A
Distribution  Amount for the Class A-12 Certificates  required to be distributed
to Holders of the Class A-12 Certificates on such Distribution  Date, subject to
adjustment in certain  events as specified in the  Agreement.  Distributions  in
reduction of the Principal  Balance of certain  Classes of Class A  Certificates
may not commence on the first  Distribution Date specified above.  Distributions
of principal  will be  allocated  among the Classes of Class A  Certificates  in
accordance with the provisions of the Agreement.  The  pass-through  rate on the
Class A-12 Certificates  applicable to each Distribution Date will be 6.500% per
annum.  Prior to the applicable  Accretion  Termination Date, no distribution of
interest on this  Certificate  will be made.  Prior to the applicable  Accretion
Termination  Date,   interest  otherwise  available  for  distribution  on  this
Certificate  will  be  added  to  the  Principal   Balance  of  the  Class  A-12
Certificates on each Distribution  Date. The amount of interest which accrues on
this  Certificate  in any month will be subject to reduction with respect to any
Non-Supported  Interest  Shortfall and the interest  portion of certain Realized
Losses allocated to the Class A-12 Certificates, as described in the Agreement.

            Distributions  on this  Certificate  will be made on  behalf  of the
Trustee  either by the Master  Servicer or by a Paying  Agent  appointed  by the
Master Servicer by check mailed to the address of the Person  entitled  thereto,
as such name and address shall appear on the Certificate  Register,  unless such
Person is entitled to receive payments by wire transfer in immediately available
funds in accordance with the Pooling and Servicing Agreement and such Person has
notified the Master  Servicer  pursuant to the Pooling and  Servicing  Agreement
that such  payments  are to be made by wire  transfer of  immediately  available
funds.  Notwithstanding  the above,  the final  distribution in reduction of the
Principal  Balance  of this  Certificate  will be made  after due  notice of the
pendency of such  distribution and only upon  presentation and surrender of this
Certificate at the office or agency specified by the Trustee for that purpose in
the notice of final distribution.

            Reference  is  hereby  made  to  the  further   provisions  of  this
Certificate set forth on the reverse hereof,  which further provisions shall for
all purposes have the same effect as if set forth at this place.

            This  Certificate  is issued on May 28,  1999,  at an issue price of
99.48750%, including accrued interest, and a stated redemption price at maturity
equal to the sum of its initial principal balance and all interest distributions
hereon (whether current or accrued),  and is issued with original issue discount
("OID") for federal income tax purposes.  Assuming that this Certificate pays in
accordance  with  projected cash flows  reflecting the prepayment  assumption of
275% SPA (as  defined  in the  Prospectus  Supplement  dated  May 21,  1999 with
respect  to the  offering  of the Class A  Certificates  (except  the Class A-PO
Certificates),  Class B-1, Class B-2 and Class B-3  Certificates)  used to price
this Certificate: (i) the amount of OID as a percentage of the initial principal
balance of this Certificate is approximately 5.56673919%;  (ii) the annual yield
to maturity of this Certificate, compounded monthly, is approximately 7.26%; and
(iii) the amount of OID  allocable  to the short first  accrual  period (May 28,
1999 to June 25, 1999) as a percentage of the initial  principal balance of this
Certificate, calculated using the exact method, is approximately 0.54172644%.

            This Certificate  constitutes a "regular interest" in a "real estate
mortgage  investment  conduit" as those terms are defined in Section  860G(a)(1)
and  Section  860D,  respectively,  of the  Internal  Revenue  Code of 1986,  as
amended.

            Unless this  Certificate  has been  countersigned  by an  authorized
officer of the  Trustee,  by manual  signature,  this  Certificate  shall not be
entitled to any benefit under the Agreement or be valid for any purpose.


<PAGE>



            IN WITNESS  WHEREOF,  the Trustee has caused this  Certificate to be
duly executed as of the date set forth below.

Dated:

                                                First Union National Bank,
                                                   Trustee


                                                By
                                                  ------------------------------
                                                  Authorized Officer

Countersigned:

First Union National Bank,
   Trustee


By
  ------------------------------
  Authorized Officer


<PAGE>


                                  EXHIBIT A-13
                    [FORM OF FACE OF CLASS A-13 CERTIFICATE]

            [UNLESS   THIS   CERTIFICATE   IS   PRESENTED   BY   AN   AUTHORIZED
REPRESENTATIVE  OF THE  DEPOSITORY  TRUST COMPANY TO THE SELLER OR ITS AGENT FOR
REGISTRATION OF TRANSFER,  EXCHANGE OR PAYMENT,  AND ANY  CERTIFICATE  ISSUED IS
REGISTERED  IN THE NAME OF CEDE & CO.  OR SUCH  OTHER  NAME AS  REQUESTED  BY AN
AUTHORIZED  REPRESENTATIVE  OF THE  DEPOSITORY  TRUST COMPANY AND ANY PAYMENT IS
MADE TO CEDE & CO.,  ANY  TRANSFER,  PLEDGE  OR OTHER  USE  HEREOF  FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL  SINCE THE  REGISTERED  OWNER  HEREOF,
CEDE & CO., HAS AN INTEREST HEREIN.]

                        MORTGAGE PASS-THROUGH CERTIFICATE
                            SERIES 1999-16 CLASS A-13

                    evidencing an interest in a pool of fixed
                    interest rate, conventional, monthly pay,
                      fully amortizing, first lien, one- to
                four-family residential mortgage loans, which may
                    include loans secured by shares issued by
                    cooperative housing corporations, sold by

                      NORWEST ASSET SECURITIES CORPORATION
                (Not an interest in or obligation of the Seller)

            THIS  CERTIFICATE DOES NOT EVIDENCE AN OBLIGATION OF, OR AN INTEREST
IN, THE SELLER, THE MASTER SERVICER, THE TRUSTEE OR ANY OF THEIR AFFILIATES, AND
IS NOT INSURED OR GUARANTEED BY THE SELLER, THE MASTER SERVICER,  THE TRUSTEE OR
ANY OF THEIR AFFILIATES, OR BY ANY GOVERNMENT AGENCY OR PRIVATE INSURER.

            UNTIL THE APPLICABLE  ACCRETION  TERMINATION DATE, THE INTEREST THAT
ACCRUES  ON THE  PRINCIPAL  BALANCE  OF THIS  CERTIFICATE  WILL NOT BE  PAYABLE.
BECAUSE  SUCH  UNPAID  INTEREST  IS  ADDED  TO THE  PRINCIPAL  BALANCE  OF  THIS
CERTIFICATE AND BECAUSE DISTRIBUTIONS IN REDUCTION OF THE PRINCIPAL BALANCE WILL
BE MADE IN THE MANNER  DESCRIBED  IN THE  AGREEMENT  (AS  DEFINED  HEREIN),  THE
OUTSTANDING  PRINCIPAL  BALANCE OF THIS  CERTIFICATE  AT ANY TIME MAY BE MORE OR
LESS THAN THE INITIAL PRINCIPAL BALANCE REPRESENTED HEREBY.

Certificate No.                           Cut-Off Date: May 1, 1999

CUSIP No.:                                First Distribution Date: June 25, 1999

Percentage Interest evidenced             Denomination: $
by this Certificate: %

Final Scheduled Maturity Date:            June 25, 2029



<PAGE>



            THIS  CERTIFIES THAT  ___________________________  is the registered
owner of the  Percentage  Interest  evidenced  by this  Certificate  in  monthly
distributions  to the Holders of the Class A-13  Certificates  with respect to a
Trust Estate consisting of a pool of fixed interest rate, conventional,  monthly
pay, fully  amortizing,  first lien,  one- to four-family  residential  mortgage
loans,  other than the Fixed Retained Yield, if any, with respect  thereto,  and
which may  include  loans  secured  by  shares  issued  by  cooperative  housing
corporations  (the  "Mortgage  Loans"),   formed  by  Norwest  Asset  Securities
Corporation  (hereinafter called the "Seller", which term includes any successor
entity  under the  Agreement  referred to below).  The Trust  Estate was created
pursuant  to a Pooling  and  Servicing  Agreement  dated as of May 28, 1999 (the
"Agreement") among the Seller, Norwest Bank Minnesota,  National Association, as
master  servicer  (the "Master  Servicer")  and First Union  National  Bank,  as
trustee (the  "Trustee"),  a summary of certain of the  pertinent  provisions of
which  is  set  forth  hereinafter.  To  the  extent  not  defined  herein,  the
capitalized  terms used herein have the  meanings  ascribed to such terms in the
Agreement.  This  Certificate  is issued  under  and is  subject  to the  terms,
provisions  and conditions of the  Agreement,  to which  Agreement the Holder of
this  Certificate by virtue of the  acceptance  hereof assents and by which such
Holder is bound.

            Pursuant to the terms of the Agreement,  a distribution will be made
on the 25th day of each  month or, if such 25th day is not a Business  Day,  the
Business Day immediately following (the "Distribution Date"),  commencing on the
first  Distribution  Date  specified  above,  to the  Person in whose  name this
Certificate  is  registered at the close of business on the last Business Day of
the month  preceding the month of such  distribution,  in an amount equal to the
product of the Percentage Interest evidenced by this Certificate and the Class A
Distribution  Amount for the Class A-13 Certificates  required to be distributed
to Holders of the Class A-13 Certificates on such Distribution  Date, subject to
adjustment in certain  events as specified in the  Agreement.  Distributions  in
reduction of the Principal  Balance of certain  Classes of Class A  Certificates
may not commence on the first  Distribution Date specified above.  Distributions
of principal  will be  allocated  among the Classes of Class A  Certificates  in
accordance with the provisions of the Agreement.  The  pass-through  rate on the
Class A-13 Certificates  applicable to each Distribution Date will be 6.500% per
annum.  Prior to the applicable  Accretion  Termination Date, no distribution of
interest on this  Certificate  will be made.  Prior to the applicable  Accretion
Termination  Date,   interest  otherwise  available  for  distribution  on  this
Certificate  will  be  added  to  the  Principal   Balance  of  the  Class  A-13
Certificates on each Distribution  Date. The amount of interest which accrues on
this  Certificate  in any month will be subject to reduction with respect to any
Non-Supported  Interest  Shortfall and the interest  portion of certain Realized
Losses allocated to the Class A-13 Certificates, as described in the Agreement.

            Distributions  on this  Certificate  will be made on  behalf  of the
Trustee  either by the Master  Servicer or by a Paying  Agent  appointed  by the
Master Servicer by check mailed to the address of the Person  entitled  thereto,
as such name and address shall appear on the Certificate  Register,  unless such
Person is entitled to receive payments by wire transfer in immediately available
funds in accordance with the Pooling and Servicing Agreement and such Person has
notified the Master  Servicer  pursuant to the Pooling and  Servicing  Agreement
that such  payments  are to be made by wire  transfer of  immediately  available
funds.  Notwithstanding  the above,  the final  distribution in reduction of the
Principal  Balance  of this  Certificate  will be made  after due  notice of the
pendency of such  distribution and only upon  presentation and surrender of this
Certificate at the office or agency specified by the Trustee for that purpose in
the notice of final distribution.

            Reference  is  hereby  made  to  the  further   provisions  of  this
Certificate set forth on the reverse hereof,  which further provisions shall for
all purposes have the same effect as if set forth at this place.

            This  Certificate  is issued on May 28,  1999,  at an issue price of
90.45625%, including accrued interest, and a stated redemption price at maturity
equal to the sum of its initial principal balance and all interest distributions
hereon (whether current or accrued),  and is issued with original issue discount
("OID") for federal income tax purposes.  Assuming that this Certificate pays in
accordance  with  projected cash flows  reflecting the prepayment  assumption of
275% SPA (as  defined  in the  Prospectus  Supplement  dated  May 21,  1999 with
respect  to the  offering  of the Class A  Certificates  (except  the Class A-PO
Certificates),  Class B-1, Class B-2 and Class B-3  Certificates)  used to price
this Certificate: (i) the amount of OID as a percentage of the initial principal
balance of this  Certificate  is  approximately  168.21761477%;  (ii) the annual
yield to maturity of this  Certificate,  compounded  monthly,  is  approximately
7.21%;  and (iii) the amount of OID allocable to the short first accrual  period
(May 28, 1999 to June 25, 1999) as a percentage of the initial principal balance
of this  Certificate,  calculated  using  the  exact  method,  is  approximately
0.48919440%.

            This Certificate  constitutes a "regular interest" in a "real estate
mortgage  investment  conduit" as those terms are defined in Section  860G(a)(1)
and  Section  860D,  respectively,  of the  Internal  Revenue  Code of 1986,  as
amended.

            Unless this  Certificate  has been  countersigned  by an  authorized
officer of the  Trustee,  by manual  signature,  this  Certificate  shall not be
entitled to any benefit under the Agreement or be valid for any purpose.


<PAGE>



            IN WITNESS  WHEREOF,  the Trustee has caused this  Certificate to be
duly executed as of the date set forth below.

Dated:

                                                First Union National Bank,
                                                   Trustee


                                                By
                                                  ------------------------------
                                                  Authorized Officer

Countersigned:

First Union National Bank,
   Trustee


By
  ------------------------------
  Authorized Officer


<PAGE>

                                  EXHIBIT A-14
                    [FORM OF FACE OF CLASS A-14 CERTIFICATE]

         AFTER THE CROSS-OVER  DATE, THE PRINCIPAL  PORTION OF REALIZED  LOSSES,
         OTHER THAN EXCESS LOSSES, ALLOCATED TO THE CLASS A-13 CERTIFICATES WILL
         BE BORNE BY THE CLASS A-14 CERTIFICATES AS DESCRIBED IN THE POOLING AND
         SERVICING AGREEMENT REFERRED TO HEREIN.

         EXCEPT AS  PROVIDED IN SECTION  5.02(C) OF THE  POOLING  AND  SERVICING
         AGREEMENT REFERRED TO HEREIN,  THIS CERTIFICATE MAY NOT BE PURCHASED BY
         OR  TRANSFERRED  TO ANY PERSON THAT HAS NOT DELIVERED A  REPRESENTATION
         LETTER  STATING  EITHER  (A) THAT  THE  TRANSFEREE  IS NOT AN  EMPLOYEE
         BENEFIT PLAN OR OTHER RETIREMENT  ARRANGEMENT SUBJECT TO TITLE I OF THE
         EMPLOYEE  RETIREMENT INCOME SECURITY ACT OF 1974, AS AMENDED ("ERISA"),
         OR SECTION 4975 OF THE INTERNAL  REVENUE CODE OF 1986,  AS AMENDED (THE
         "CODE"),  OR A GOVERNMENTAL PLAN, AS DEFINED IN SECTION 3(32) OF ERISA,
         SUBJECT  TO ANY  FEDERAL,  STATE OR LOCAL LAW  WHICH IS, TO A  MATERIAL
         EXTENT,  SIMILAR  TO THE  FOREGOING  PROVISIONS  OF  ERISA  OR THE CODE
         (COLLECTIVELY,  A "PLAN"),  AND IS NOT ACTING ON BEHALF OF OR INVESTING
         THE ASSETS OF A PLAN OR (B) SUBJECT TO CERTAIN  CONDITIONS SET FORTH IN
         THE POOLING AND SERVICING  AGREEMENT,  THAT THE SOURCE OF FUNDS USED TO
         PURCHASE THIS CERTIFICATE IS AN "INSURANCE COMPANY GENERAL ACCOUNT."


<PAGE>


                        MORTGAGE PASS-THROUGH CERTIFICATE
                            SERIES 1999-16 CLASS A-14

                    evidencing an interest in a pool of fixed
                    interest rate, conventional, monthly pay,
                      fully amortizing, first lien, one- to
                four-family residential mortgage loans, which may
                    include loans secured by shares issued by
                    cooperative housing corporations, sold by

                      NORWEST ASSET SECURITIES CORPORATION
                (Not an interest in or obligation of the Seller)

            THIS  CERTIFICATE DOES NOT EVIDENCE AN OBLIGATION OF, OR AN INTEREST
IN, THE SELLER,  THE MASTER SERVICER,  THE TRUSTEE,  THE TRUSTEE OR ANY OF THEIR
AFFILIATES, AND IS NOT INSURED OR GUARANTEED BY THE SELLER, THE MASTER SERVICER,
THE TRUSTEE, THE TRUSTEE OR ANY OF THEIR AFFILIATES, OR BY ANY GOVERNMENT AGENCY
OR PRIVATE INSURER.

            DISTRIBUTIONS  IN  REDUCTION  OF  THE  PRINCIPAL   BALANCE  OF  THIS
CERTIFICATE  WILL BE MADE IN THE MANNER  DESCRIBED IN THE POOLING AND  SERVICING
AGREEMENT. ACCORDINGLY, THE OUTSTANDING PRINCIPAL BALANCE OF THIS CERTIFICATE AT
ANY TIME MAY BE LESS THAN THE INITIAL PRINCIPAL BALANCE REPRESENTED HEREBY.

Certificate No.                          Cut-Off Date: May 1, 1999

CUSIP No.:                               First Distribution Date: June 25, 1999

Percentage Interest evidenced            Denomination: $
by this Certificate: %

Final Scheduled Maturity Date:           June 25, 2029


<PAGE>

            THIS  CERTIFIES THAT  ___________________________  is the registered
owner of the  Percentage  Interest  evidenced  by this  Certificate  in  monthly
distributions  to the Holders of the Class A-14  Certificates  with respect to a
Trust Estate consisting of a pool of fixed interest rate, conventional,  monthly
pay, fully  amortizing,  first lien,  one- to four-family  residential  mortgage
loans,  other than the Fixed Retained Yield, if any, with respect  thereto,  and
which may  include  loans  secured  by  shares  issued  by  cooperative  housing
corporations  (the  "Mortgage  Loans"),   formed  by  Norwest  Asset  Securities
Corporation  (hereinafter called the "Seller", which term includes any successor
entity  under the  Agreement  referred to below).  The Trust  Estate was created
pursuant  to a Pooling  and  Servicing  Agreement  dated as of May 28, 1999 (the
"Agreement") among the Seller, Norwest Bank Minnesota,  National Association, as
master  servicer  (the "Master  Servicer")  and First Union  National  Bank,  as
trustee (the  "Trustee"),  a summary of certain of the  pertinent  provisions of
which  is  set  forth  hereinafter.  To  the  extent  not  defined  herein,  the
capitalized  terms used herein have the  meanings  ascribed to such terms in the
Agreement.  This  Certificate  is issued  under  and is  subject  to the  terms,
provisions  and conditions of the  Agreement,  to which  Agreement the Holder of
this  Certificate by virtue of the  acceptance  hereof assents and by which such
Holder is bound.

            Pursuant to the terms of the Agreement,  a distribution will be made
on the 25th day of each  month or, if such 25th day is not a Business  Day,  the
Business Day immediately following (the "Distribution Date"),  commencing on the
first  Distribution  Date  specified  above,  to the  Person in whose  name this
Certificate  is  registered at the close of business on the last Business Day of
the month  preceding the month of such  distribution,  in an amount equal to the
product of the Percentage Interest evidenced by this Certificate and the Class A
Distribution  Amount for the Class A-14 Certificates  required to be distributed
to Holders of the Class A-14 Certificates on such Distribution  Date, subject to
adjustment in certain  events as specified in the  Agreement.  Distributions  in
reduction of the Principal  Balance of certain  Classes of Class A  Certificates
may not commence on the first  Distribution Date specified above.  Distributions
of principal  will be  allocated  among the Classes of Class A  Certificates  in
accordance with the provisions of the Agreement.  The  pass-through  rate on the
Class A-14 Certificates  applicable to each Distribution Date will be 6.500% per
annum.  The amount of interest  which accrues on this  Certificate  in any month
will  be  subject  to  reduction  with  respect  to any  Non-Supported  Interest
Shortfall and the interest  portion of certain  Realized Losses allocated to the
Class A-14 Certificates, as described in the Agreement.

            Distributions  on this  Certificate  will be made on  behalf  of the
Trustee  either by the Master  Servicer or by a Paying  Agent  appointed  by the
Master Servicer by check mailed to the address of the Person  entitled  thereto,
as such name and address shall appear on the Certificate  Register,  unless such
Person is entitled to receive payments by wire transfer in immediately available
funds in accordance with the Pooling and Servicing Agreement and such Person has
notified the Master  Servicer  pursuant to the Pooling and  Servicing  Agreement
that such  payments  are to be made by wire  transfer of  immediately  available
funds.  Notwithstanding  the above,  the final  distribution in reduction of the
Principal  Balance  of this  Certificate  will be made  after due  notice of the
pendency of such  distribution and only upon  presentation and surrender of this
Certificate at the office or agency specified by the Trustee for that purpose in
the notice of final distribution.

            No  transfer  of a Class A-14  Certificate  will be made  unless the
Holder hereof  desiring to make any such  transfer  shall deliver to the Trustee
(i) a representation letter, in the form as described in the Agreement,  stating
either  (a) that the  transferee  is not a Plan and is not acting on behalf of a
Plan or using the assets of a Plan to effect  such  purchase  or (b)  subject to
certain conditions described in the Agreement,  that the source of funds used to
purchase this Certificate is an "insurance  company general account," or (ii) if
such  transferee is a Plan, (a) an opinion of counsel  acceptable to and in form
and substance satisfactory to the Trustee and the Seller with respect to certain
matters and (b) such other  documentation  as the Seller or the Master  Servicer
may require, as described in the Agreement.

            Reference  is  hereby  made  to  the  further   provisions  of  this
Certificate set forth on the reverse hereof,  which further provisions shall for
all purposes have the same effect as if set forth at this place.

            This  Certificate  is issued on May 28, 1999, and based on its issue
price of 94.98750%, including accrued interest, and a stated redemption price at
maturity equal to its initial  principal balance (plus 3 days of interest at the
pass-through  rate hereon),  is issued with original issue discount  ("OID") for
federal income tax purposes.  Assuming that this  Certificate pays in accordance
with projected cash flows  reflecting the prepayment  assumption of 275% SPA (as
defined in the  Prospectus  Supplement  dated May 21,  1999 with  respect to the
offering of the Class A Certificates (except the Class A-PO Certificates), Class
B-1, Class B-2 and Class B-3 Certificates)  used to price this Certificate:  (i)
the  amount of OID as a  percentage  of the  initial  principal  balance of this
Certificate is approximately  5.06666667%;  (ii) the annual yield to maturity of
this  Certificate,  compounded  monthly,  is approximately  7.05%; and (iii) the
amount of OID allocable to the short first accrual  period (May 28, 1999 to June
25, 1999) as a percentage of the initial  principal balance of this Certificate,
calculated using the exact method, is approximately 0.01494145%.

            This Certificate  constitutes a "regular interest" in a "real estate
mortgage  investment  conduit" as those terms are defined in Section  860G(a)(1)
and  Section  860D,  respectively,  of the  Internal  Revenue  Code of 1986,  as
amended.

            Unless this  Certificate  has been  countersigned  by an  authorized
officer of the  Trustee,  by manual  signature,  this  Certificate  shall not be
entitled to any benefit under the Agreement or be valid for any purpose.


<PAGE>



            IN WITNESS  WHEREOF,  the Trustee has caused this  Certificate to be
duly executed as of the date set forth below.

Dated:

                                                First Union National Bank,
                                                   Trustee


                                                By
                                                  ------------------------------
                                                  Authorized Officer

Countersigned:

First Union National Bank,
   Trustee


By
  ------------------------------
  Authorized Officer


<PAGE>

                                  EXHIBIT A-PO
                    [FORM OF FACE OF CLASS A-PO CERTIFICATE]

THIS  CERTIFICATE  HAS NOT BEEN AND WILL NOT BE REGISTERED  UNDER THE SECURITIES
ACT OF 1933,  AS  AMENDED,  OR THE  SECURITIES  LAWS OF ANY STATE AND MAY NOT BE
RESOLD OR TRANSFERRED  UNLESS IT IS REGISTERED  PURSUANT TO SUCH ACT AND LAWS OR
IS SOLD OR TRANSFERRED IN TRANSACTIONS  WHICH ARE EXEMPT FROM REGISTRATION UNDER
SUCH ACT AND UNDER  APPLICABLE  STATE LAW AND IS TRANSFERRED IN ACCORDANCE  WITH
THE PROVISIONS OF SECTION 5.02 OF THE POOLING AND SERVICING  AGREEMENT  REFERRED
TO HEREIN.

EXCEPT AS PROVIDED IN SECTION  5.02(C) OF THE  POOLING AND  SERVICING  AGREEMENT
REFERRED TO HEREIN,  THIS  CERTIFICATE MAY NOT BE PURCHASED BY OR TRANSFERRED TO
ANY PERSON  THAT HAS NOT  DELIVERED A  REPRESENTATION  LETTER  STATING  THAT THE
TRANSFEREE  IS NOT AN  EMPLOYEE  BENEFIT  PLAN OR OTHER  RETIREMENT  ARRANGEMENT
SUBJECT TO TITLE I OF THE EMPLOYEE  RETIREMENT  INCOME  SECURITY ACT OF 1974, AS
AMENDED  ("ERISA")  OR SECTION 4975 OF THE  INTERNAL  REVENUE  CODE OF 1986,  AS
AMENDED (THE  "CODE"),  OR A  GOVERNMENTAL  PLAN, AS DEFINED IN SECTION 3(32) OF
ERISA,  SUBJECT  TO ANY  FEDERAL,  STATE OR LOCAL LAW  WHICH  IS, TO A  MATERIAL
EXTENT,  SIMILAR TO THE FOREGOING PROVISIONS OF ERISA OR THE CODE (COLLECTIVELY,
A "PLAN"), AND IS NOT ACTING ON BEHALF OF OR INVESTING THE ASSETS OF A PLAN.


<PAGE>



                        MORTGAGE PASS-THROUGH CERTIFICATE
                           SERIES 1999-16, CLASS A-PO

            evidencing an interest in a pool of fixed interest rate,
  conventional, monthly pay, fully amortizing, first lien, one- to four-family
      residential mortgage loans, which may include loans secured by shares
                   issued by cooperative housing corporations,
                                     sold by

                      NORWEST ASSET SECURITIES CORPORATION
                (Not an interest in or obligation of the Seller)

            THIS  CERTIFICATE DOES NOT EVIDENCE AN OBLIGATION OF, OR AN INTEREST
IN, THE SELLER, THE MASTER SERVICER, THE TRUSTEE OR ANY OF THEIR AFFILIATES, AND
IS NOT INSURED OR GUARANTEED BY THE SELLER, THE MASTER SERVICER,  THE TRUSTEE OR
ANY OF THEIR AFFILIATES, OR BY ANY GOVERNMENT AGENCY OR PRIVATE INSURER.

            DISTRIBUTIONS  IN  REDUCTION  OF  THE  PRINCIPAL   BALANCE  OF  THIS
CERTIFICATE  WILL BE MADE IN THE MANNER  DESCRIBED IN THE POOLING AND  SERVICING
AGREEMENT. ACCORDINGLY, THE OUTSTANDING PRINCIPAL BALANCE OF THIS CERTIFICATE AT
ANY TIME MAY BE LESS THAN THE INITIAL PRINCIPAL BALANCE REPRESENTED HEREBY.

Certificate No.                           Cut-Off Date: May 1, 1999

CUSIP No.:                                First Distribution Date: June 25, 1999

Percentage Interest evidenced             Denomination: $
by this Certificate: %

Final Scheduled Maturity Date:            June 25, 2029


<PAGE>


            THIS CERTIFIES THAT  ____________________________  is the registered
owner of the  Percentage  Interest  evidenced  by this  Certificate  in  monthly
distributions  to the Holders of the Class A-PO  Certificates  with respect to a
Trust Estate consisting of a pool of fixed interest rate, conventional,  monthly
pay, fully  amortizing,  first lien,  one- to four-family  residential  mortgage
loans,  other than the Fixed Retained Yield, if any, with respect  thereto,  and
which may  include  loans  secured  by  shares  issued  by  cooperative  housing
corporations   (the  "Mortgage   Loans")  formed  by  Norwest  Asset  Securities
Corporation  (hereinafter called the "Seller", which term includes any successor
entity  under the  Agreement  referred to below).  The Trust  Estate was created
pursuant  to a Pooling  and  Servicing  Agreement  dated as of May 28, 1999 (the
"Agreement") among the Seller, Norwest Bank Minnesota,  National Association, as
master  servicer  (the "Master  Servicer")  and First Union  National  Bank,  as
trustee (the  "Trustee"),  a summary of certain of the  pertinent  provisions of
which  is  set  forth  hereinafter.  To  the  extent  not  defined  herein,  the
capitalized  terms used herein have the  meanings  ascribed to such terms in the
Agreement.  This  Certificate  is issued  under  and is  subject  to the  terms,
provisions  and conditions of the  Agreement,  to which  Agreement the Holder of
this  Certificate by virtue of the  acceptance  hereof assents and by which such
Holder is bound.

            Pursuant to the terms of the Agreement,  a distribution will be made
on the 25th day of each  month or, if such 25th day is not a Business  Day,  the
Business Day immediately following (the "Distribution Date"),  commencing on the
first  Distribution  Date  specified  above,  to the  Person in whose  name this
Certificate  is  registered at the close of business on the last Business Day of
the month  preceding the month of such  distribution,  in an amount equal to the
product of the Percentage Interest evidenced by this Certificate and the Class A
Distribution  Amount for the Class A-PO Certificates  required to be distributed
to Holders of the Class A-PO Certificates on such Distribution  Date, subject to
adjustment  in certain  events as  specified  in the  Agreement.  The Class A-PO
Certificates will not be entitled to distributions in respect of interest.

            Distributions  on this  Certificate  will be made on  behalf  of the
Trustee  either by the Master  Servicer or by a Paying  Agent  appointed  by the
Master Servicer by check mailed to the address of the Person  entitled  thereto,
as such name and address shall appear on the Certificate  Register,  unless such
Person is entitled to receive payments by wire transfer in immediately available
funds in accordance with the Pooling and Servicing Agreement and such Person has
notified the Master  Servicer  pursuant to the Pooling and  Servicing  Agreement
that such  payments  are to be made by wire  transfer of  immediately  available
funds.  Notwithstanding  the above,  the final  distribution in reduction of the
Principal  Balance  of this  Certificate  will be made  after due  notice of the
pendency of such  distribution and only upon  presentation and surrender of this
Certificate at the office or agency specified by the Trustee for that purpose in
the notice of final distribution.

            No  transfer  of a Class A-PO  Certificate  will be made unless such
transfer is exempt from the  registration  requirements of the Securities Act of
1933,  as  amended,  and  any  applicable  state  securities  laws or is made in
accordance  with said Act and laws. In the event that such a transfer is desired
to be made by the Holder hereof,  (i) the transferee will be required to execute
an  investment  letter in the form  described in the  Agreement and (ii) if such
transfer  is to be made  within  three  years  from the later of (a) the date of
initial issuance of the Certificates or (b) the last date on which the Seller or
any  affiliate  thereof  was  a  Holder  of  the  Certificates  proposed  to  be
transferred,  and unless  such  transfer is made in reliance on Rule 144A of the
Securities  Act of 1933,  as amended,  the Trustee or the Seller may require the
Holder to deliver an opinion of counsel  acceptable to and in form and substance
satisfactory  to the  Trustee  and the  Seller  that  such  transfer  is  exempt
(describing  the applicable  exemption and the basis  therefor) from or is being
made pursuant to the registration requirements of the Securities Act of 1933, as
amended,  and of any applicable statute of any state. The Holder hereof desiring
to effect such transfer shall,  and does hereby agree to, indemnify the Trustee,
the Seller,  the Master  Servicer,  and any Paying Agent acting on behalf of the
Trustee  against any liability  that may result if the transfer is not so exempt
or is not made in  accordance  with such Federal and state laws.  In  connection
with any such  transfer,  the Trustee  will also  require  (i) a  representation
letter,  in the form as described in the Agreement,  stating that the transferee
is not a Plan and is not  acting on  behalf  of a Plan or using the  assets of a
Plan to  effect  such  purchase  or (ii) if such  transferee  is a Plan,  (a) an
opinion of counsel  acceptable to and in form and substance  satisfactory to the
Trustee  and  the  Seller  with  respect  to  certain  matters  and  such  other
documentation as the Seller or the Master Servicer may require,  as described in
the Agreement.

            Reference  is  hereby  made  to  the  further   provisions  of  this
Certificate set forth on the reverse hereof,  which further provisions shall for
all purposes have the same effect as if set forth at this place.

            This  Certificate  is issued on May 28,  1999,  at an issue price of
66.59375%  and a stated  redemption  price  at  maturity  equal  to its  initial
principal  balance,  and is issued  with  original  issue  discount  ("OID") for
federal income tax purposes.  Assuming that this  Certificate pays in accordance
with projected cash flows  reflecting the prepayment  assumption of 275% SPA (as
defined in the  Prospectus  Supplement  dated May 21,  1999 with  respect to the
offering of the Class A Certificates (except the Class A-PO Certificates), Class
B-1, Class B-2 and Class B-3 Certificates)  used to price this Certificate:  (i)
the  amount of OID as a  percentage  of the  initial  principal  balance of this
Certificate is approximately 33.40625000%;  (ii) the annual yield to maturity of
this  Certificate,  compounded  monthly,  is approximately  7.63%; and (iii) the
amount of OID allocable to the short first accrual  period (May 28, 1999 to June
25, 1999) as a percentage of the initial  principal balance of this Certificate,
calculated using the exact method, is approximately 0.38074719%.

            This Certificate  constitutes a "regular interest" in a "real estate
mortgage  investment  conduit" as those terms are defined in Section  860G(a)(1)
and  Section  860D,  respectively,  of the  Internal  Revenue  Code of 1986,  as
amended.

            Unless this  Certificate  has been  countersigned  by an  authorized
officer  of the  Trustee  by manual  signature,  this  Certificate  shall not be
entitled to any benefit under the Agreement or be valid for any purpose.


<PAGE>



            IN WITNESS  WHEREOF,  the Trustee has caused this  Certificate to be
duly executed as of the date set forth below.

Dated:

                                                First Union National Bank,
                                                   Trustee


                                                By
                                                  ------------------------------
                                                  Authorized Officer

Countersigned:

First Union National Bank,
   Trustee


By
  ------------------------------
  Authorized Officer


<PAGE>

                                   EXHIBIT A-R
                     [Form of Face of Class A-R Certificate]

FOR U.S. FEDERAL INCOME TAX PURPOSES,  THIS CERTIFICATE IS A "RESIDUAL INTEREST"
IN A "REAL  ESTATE  MORTGAGE  INVESTMENT  CONDUIT" AS THOSE  TERMS ARE  DEFINED,
RESPECTIVELY,  IN SECTIONS  860G(a)(2) AND 860D OF THE INTERNAL  REVENUE CODE OF
1986, AS AMENDED (THE "CODE").  A TRANSFEREE OF THIS CERTIFICATE,  BY ACCEPTANCE
HEREOF,  IS  DEEMED  TO  HAVE  ACCEPTED  THIS  CERTIFICATE  SUBJECT  TO  CERTAIN
RESTRICTIONS ON TRANSFERABILITY,  AS SET FORTH IN SECTION 5.02(d) OF THE POOLING
AND  SERVICING  AGREEMENT,  AND SHALL BE REQUIRED TO FURNISH AN AFFIDAVIT TO THE
TRANSFEROR AND THE TRUSTEE TO THE EFFECT THAT,  AMONG OTHER THINGS,  IT IS NOT A
DISQUALIFIED  ORGANIZATION,  AS SUCH TERM IS DEFINED IN CODE SECTION 860E(e)(5),
AN AGENT  (INCLUDING A BROKER,  NOMINEE OR OTHER  MIDDLEMAN)  FOR A DISQUALIFIED
ORGANIZATION OR A NON-PERMITTED FOREIGN HOLDER, AS DEFINED IN SECTION 5.02(d) OF
THE POOLING AND SERVICING AGREEMENT AND TO HAVE AGREED TO SUCH AMENDMENTS TO THE
POOLING AND  SERVICING  AGREEMENT AS MAY BE REQUIRED TO FURTHER  EFFECTUATE  THE
RESTRICTIONS  ON  TRANSFERS TO  DISQUALIFIED  ORGANIZATIONS,  AGENTS  THEREOF OR
NON-PERMITTED FOREIGN HOLDERS.

THE HOLDER OF THIS CLASS A-R  CERTIFICATE,  BY ACCEPTANCE  HEREOF,  IS DEEMED TO
HAVE  AGREED TO THE  DESIGNATION  OF THE MASTER  SERVICER AS ITS AGENT TO ACT AS
"TAX  MATTERS  PERSON" OF THE REMIC TO PERFORM THE  FUNCTIONS  OF A "TAX MATTERS
PARTNER" FOR  PURPOSES OF  SUBCHAPTER C OF CHAPTER 63 OF SUBTITLE F OF THE CODE,
OR, IF SO REQUESTED BY THE MASTER SERVICER,  TO ACT AS TAX MATTERS PERSON OF THE
REMIC.

THIS  CERTIFICATE  MAY NOT BE PURCHASED BY OR TRANSFERRED TO ANY PERSON WHICH IS
AN EMPLOYEE BENEFIT PLAN OR OTHER RETIREMENT  ARRANGEMENT  SUBJECT TO TITLE I OF
THE EMPLOYEE  RETIREMENT INCOME SECURITY ACT OF 1974, AS AMENDED  ("ERISA"),  OR
SECTION 4975 OF THE CODE OR A GOVERNMENTAL  PLAN, AS DEFINED IN SECTION 3(32) OF
ERISA SUBJECT TO ANY FEDERAL, STATE OR LOCAL LAW WHICH IS, TO A MATERIAL EXTENT,
SIMILAR  TO THE  FOREGOING  PROVISIONS  OF ERISA OR THE  CODE  (COLLECTIVELY,  A
"PLAN"), OR ANY PERSON ACTING ON BEHALF OF OR INVESTING THE ASSETS OF A PLAN.

                        MORTGAGE PASS-THROUGH CERTIFICATE
                            SERIES 1999-16, CLASS A-R

                    evidencing an interest in a pool of fixed
                    interest rate, conventional, monthly pay,
                      fully amortizing, first lien, one- to
                four-family residential mortgage loans, which may
                    include loans secured by shares issued by
                    cooperative housing corporations, sold by

                      NORWEST ASSET SECURITIES CORPORATION
                (Not an interest in or obligation of the Seller)

            THIS  CERTIFICATE DOES NOT EVIDENCE AN OBLIGATION OF, OR AN INTEREST
IN, THE SELLER, THE MASTER SERVICER, THE TRUSTEE OR ANY OF THEIR AFFILIATES, AND
IS NOT INSURED OR GUARANTEED BY THE SELLER, THE MASTER SERVICER,  THE TRUSTEE OR
ANY OF THEIR AFFILIATES, OR BY ANY GOVERNMENT AGENCY OR PRIVATE INSURER.

            DISTRIBUTIONS  IN  REDUCTION  OF  THE  PRINCIPAL   BALANCE  OF  THIS
CERTIFICATE  WILL BE MADE IN THE MANNER  DESCRIBED IN THE POOLING AND  SERVICING
AGREEMENT. ACCORDINGLY, THE OUTSTANDING PRINCIPAL BALANCE OF THIS CERTIFICATE AT
ANY TIME MAY BE LESS THAN THE INITIAL PRINCIPAL BALANCE REPRESENTED HEREBY.

Certificate No.                           Cut-Off Date: May 1, 1999

CUSIP No.:                                First Distribution Date: June 25, 1999

Percentage Interest evidenced             Denomination: $100.00
by this Certificate: 100%

Final Scheduled Maturity Date:            June 25, 2029

<PAGE>

            THIS  CERTIFIES  THAT  __________________________  is the registered
owner of the  Percentage  Interest  evidenced  by this  Certificate  in  monthly
distributions to the Holder of the Class A-R Certificate with respect to a Trust
Estate consisting of a pool of fixed interest rate,  conventional,  monthly pay,
fully amortizing,  first lien, one- to four-family  residential  mortgage loans,
other than the Fixed Retained Yield, if any, with respect thereto, and which may
include loans secured by shares issued by cooperative housing  corporations (the
"Mortgage Loans"),  formed by Norwest Asset Securities Corporation  (hereinafter
called  the  "Seller",  which  term  includes  any  successor  entity  under the
Agreement referred to below). The Trust Estate was created pursuant to a Pooling
and Servicing  Agreement  dated as of May 28, 1999 (the  "Agreement")  among the
Seller,  Norwest Bank Minnesota,  National Association,  as master servicer (the
"Master Servicer") and First Union National Bank, as trustee (the "Trustee"),  a
summary  of  certain  of  the  pertinent   provisions  of  which  is  set  forth
hereinafter. To the extent not defined herein, the capitalized terms used herein
have the meanings  ascribed to such terms in the Agreement.  This Certificate is
issued  under and is subject  to the terms,  provisions  and  conditions  of the
Agreement,  to which  Agreement the Holder of this  Certificate by virtue of the
acceptance hereof assents and by which such Holder is bound.

            Pursuant to the terms of the Agreement,  a distribution will be made
on the 25th day of each  month or, if such 25th day is not a Business  Day,  the
Business Day immediately following (the "Distribution Date"),  commencing on the
first  Distribution  Date  specified  above,  to the  Person in whose  name this
Certificate  is  registered at the close of business on the last Business Day of
the month  preceding the month of such  distribution,  in an amount equal to the
product of the Percentage Interest evidenced by this Certificate and the Class A
Distribution Amount for the Class A-R Certificate  required to be distributed to
the Holder of the Class A-R Certificate on such  Distribution  Date,  subject to
adjustment in certain  events as specified in the  Agreement.  Distributions  in
reduction of the Principal  Balance of certain  Classes of Class A  Certificates
may not commence on the first  Distribution Date specified above.  Distributions
of principal  will be  allocated  among the Classes of Class A  Certificates  in
accordance with the provisions of the Agreement.  The  pass-through  rate on the
Class A-R Certificate  applicable to each  Distribution  Date will be 6.500% per
annum.  The amount of interest  which accrues on this  Certificate  in any month
will  be  subject  to  reduction  with  respect  to any  Non-Supported  Interest
Shortfall and the interest  portion of certain  Realized Losses allocated to the
Class A-R Certificate, as described in the Agreement.

            Distributions  on this  Certificate  will be made on  behalf  of the
Trustee  either by the Master  Servicer or by a Paying  Agent  appointed  by the
Master Servicer by check mailed to the address of the Person  entitled  thereto,
as  such  name  and  address   shall   appear  on  the   Certificate   Register.
Notwithstanding  the above,  the final  distribution on this Certificate will be
made  after  due  notice  of the  pendency  of such  distribution  and only upon
presentation and surrender of this Certificate at the office or agency specified
by the Trustee for that purpose in the notice of final distribution.

            Reference  is  hereby  made  to  the  further   provisions  of  this
Certificate set forth on the reverse hereof,  which further provisions shall for
all purposes have the same effect as if set forth at this place.

            Unless this  Certificate  has been  countersigned  by an  authorized
officer of the  Trustee,  by manual  signature,  this  Certificate  shall not be
entitled to any benefit under the Agreement or be valid for any purpose.


<PAGE>



            IN WITNESS  WHEREOF,  the Trustee has caused this  Certificate to be
duly executed as of the date set forth below.

Dated:

                                                First Union National Bank,
                                                   Trustee


                                                By
                                                  ------------------------------
                                                  Authorized Officer

Countersigned:

First Union National Bank,
   Trustee


By
  ------------------------------
  Authorized Officer


<PAGE>

                                  EXHIBIT A-LR
                    [Form of Face of Class A-LR Certificate]

FOR U.S. FEDERAL INCOME TAX PURPOSES,  THIS CERTIFICATE IS A "RESIDUAL INTEREST"
IN A "REAL  ESTATE  MORTGAGE  INVESTMENT  CONDUIT" AS THOSE  TERMS ARE  DEFINED,
RESPECTIVELY,  IN SECTIONS  860G(a)(2) AND 860D OF THE INTERNAL  REVENUE CODE OF
1986, AS AMENDED (THE "CODE").  A TRANSFEREE OF THIS CERTIFICATE,  BY ACCEPTANCE
HEREOF,  IS  DEEMED  TO  HAVE  ACCEPTED  THIS  CERTIFICATE  SUBJECT  TO  CERTAIN
RESTRICTIONS ON TRANSFERABILITY,  AS SET FORTH IN SECTION 5.02(d) OF THE POOLING
AND  SERVICING  AGREEMENT,  AND SHALL BE REQUIRED TO FURNISH AN AFFIDAVIT TO THE
TRANSFEROR AND THE TRUST  ADMINISTRATOR  TO THE EFFECT THAT, AMONG OTHER THINGS,
IT IS NOT A DISQUALIFIED  ORGANIZATION,  AS SUCH TERM IS DEFINED IN CODE SECTION
860E(e)(5),  AN AGENT  (INCLUDING A BROKER,  NOMINEE OR OTHER  MIDDLEMAN)  FOR A
DISQUALIFIED  ORGANIZATION  OR A  NON-PERMITTED  FOREIGN  HOLDER,  AS DEFINED IN
SECTION  5.02(d) OF THE POOLING AND  SERVICING  AGREEMENT  AND TO HAVE AGREED TO
SUCH  AMENDMENTS  TO THE POOLING AND  SERVICING  AGREEMENT AS MAY BE REQUIRED TO
FURTHER EFFECTUATE THE RESTRICTIONS ON TRANSFERS TO DISQUALIFIED  ORGANIZATIONS,
AGENTS THEREOF OR NON-PERMITTED FOREIGN HOLDERS.

THE HOLDER OF THIS CLASS A-LR  CERTIFICATE,  BY ACCEPTANCE  HEREOF, IS DEEMED TO
HAVE  AGREED TO THE  DESIGNATION  OF THE MASTER  SERVICER AS ITS AGENT TO ACT AS
"TAX MATTERS PERSON" OF THE LOWER-TIER  REMIC TO PERFORM THE FUNCTIONS OF A "TAX
MATTERS PARTNER" FOR PURPOSES OF SUBCHAPTER C OF CHAPTER 63 OF SUBTITLE F OF THE
CODE, OR, IF SO REQUESTED BY THE MASTER  SERVICER,  TO ACT AS TAX MATTERS PERSON
OF THE LOWER-TIER REMIC.

THIS  CERTIFICATE  MAY NOT BE PURCHASED BY OR TRANSFERRED TO ANY PERSON WHICH IS
AN EMPLOYEE BENEFIT PLAN OR OTHER RETIREMENT  ARRANGEMENT  SUBJECT TO TITLE I OF
THE EMPLOYEE  RETIREMENT INCOME SECURITY ACT OF 1974, AS AMENDED  ("ERISA"),  OR
SECTION 4975 OF THE CODE OR A GOVERNMENTAL  PLAN, AS DEFINED IN SECTION 3(32) OF
ERISA SUBJECT TO ANY FEDERAL, STATE OR LOCAL LAW WHICH IS, TO A MATERIAL EXTENT,
SIMILAR  TO THE  FOREGOING  PROVISIONS  OF ERISA OR THE  CODE  (COLLECTIVELY,  A
"PLAN"), OR ANY PERSON ACTING ON BEHALF OF OR INVESTING THE ASSETS OF A PLAN.

                        MORTGAGE PASS-THROUGH CERTIFICATE
                           SERIES 1999-16, CLASS A-LR

                    evidencing an interest in a pool of fixed
                    interest rate, conventional, monthly pay,
                      fully amortizing, first lien, one- to
                four-family residential mortgage loans, which may
                    include loans secured by shares issued by
                    cooperative housing corporations, sold by

                      NORWEST ASSET SECURITIES CORPORATION
                (Not an interest in or obligation of the Seller)

            THIS  CERTIFICATE DOES NOT EVIDENCE AN OBLIGATION OF, OR AN INTEREST
IN, THE SELLER, THE MASTER SERVICER, THE TRUSTEE OR ANY OF THEIR AFFILIATES, AND
IS NOT INSURED OR GUARANTEED BY THE SELLER, THE MASTER SERVICER,  THE TRUSTEE OR
ANY OF THEIR AFFILIATES, OR BY ANY GOVERNMENT AGENCY OR PRIVATE INSURER.

            DISTRIBUTIONS  IN  REDUCTION  OF  THE  PRINCIPAL   BALANCE  OF  THIS
CERTIFICATE  WILL BE MADE IN THE MANNER  DESCRIBED IN THE POOLING AND  SERVICING
AGREEMENT. ACCORDINGLY, THE OUTSTANDING PRINCIPAL BALANCE OF THIS CERTIFICATE AT
ANY TIME MAY BE LESS THAN THE INITIAL PRINCIPAL BALANCE REPRESENTED HEREBY.

Certificate No.                           Cut-Off Date: May 1, 1999

CUSIP No.:                                First Distribution Date: June 25, 1999

Percentage Interest evidenced             Denomination: $100.00
by this Certificate: 100%

Final Scheduled Maturity Date:            June 25, 2029


<PAGE>


            THIS  CERTIFIES  THAT  __________________________  is the registered
owner of the  Percentage  Interest  evidenced  by this  Certificate  in  monthly
distributions  to the Holder of the Class  A-LR  Certificate  with  respect to a
Trust Estate consisting of a pool of fixed interest rate, conventional,  monthly
pay, fully  amortizing,  first lien,  one- to four-family  residential  mortgage
loans,  other than the Fixed Retained Yield, if any, with respect  thereto,  and
which may  include  loans  secured  by  shares  issued  by  cooperative  housing
corporations  (the  "Mortgage  Loans"),   formed  by  Norwest  Asset  Securities
Corporation  (hereinafter called the "Seller", which term includes any successor
entity  under the  Agreement  referred to below).  The Trust  Estate was created
pursuant  to a Pooling  and  Servicing  Agreement  dated as of May 28, 1999 (the
"Agreement") among the Seller, Norwest Bank Minnesota,  National Association, as
master servicer (the "Master Servicer"),  and First Union National Bank, as (the
"Trustee"),  a summary of certain of the  pertinent  provisions  of which is set
forth hereinafter.  To the extent not defined herein, the capitalized terms used
herein  have  the  meanings  ascribed  to  such  terms  in the  Agreement.  This
Certificate  is  issued  under  and is  subject  to the  terms,  provisions  and
conditions of the Agreement,  to which Agreement the Holder of this  Certificate
by virtue of the acceptance hereof assents and by which such Holder is bound.

            Pursuant to the terms of the Agreement,  a distribution will be made
on the 25th day of each  month or, if such 25th day is not a Business  Day,  the
Business Day immediately following (the "Distribution Date"),  commencing on the
first  Distribution  Date  specified  above,  to the  Person in whose  name this
Certificate  is  registered at the close of business on the last Business Day of
the month  preceding the month of such  distribution,  in an amount equal to the
product of the Percentage Interest evidenced by this Certificate and the Class A
Distribution Amount for the Class A-LR Certificate required to be distributed to
the Holder of the Class A-LR Certificate on such Distribution  Date,  subject to
adjustment in certain  events as specified in the  Agreement.  Distributions  in
reduction of the Principal  Balance of certain  Classes of Class A  Certificates
may not commence on the first  Distribution Date specified above.  Distributions
of principal  will be  allocated  among the Classes of Class A  Certificates  in
accordance with the provisions of the Agreement.  The  pass-through  rate on the
Class A-LR Certificate  applicable to each  Distribution Date will be 6.500% per
annum.  The amount of interest  which accrues on this  Certificate  in any month
will  be  subject  to  reduction  with  respect  to any  Non-Supported  Interest
Shortfall and the interest  portion of certain  Realized Losses allocated to the
Class A-LR Certificate, as described in the Agreement.

            Distributions  on this  Certificate  will be made on  behalf  of the
Trustee  either by the Master  Servicer or by a Paying  Agent  appointed  by the
Master Servicer by check mailed to the address of the Person  entitled  thereto,
as  such  name  and  address   shall   appear  on  the   Certificate   Register.
Notwithstanding  the above,  the final  distribution on this Certificate will be
made  after  due  notice  of the  pendency  of such  distribution  and only upon
presentation and surrender of this Certificate at the office or agency specified
by the Trustee for that purpose in the notice of final distribution.

            Reference  is  hereby  made  to  the  further   provisions  of  this
Certificate set forth on the reverse hereof,  which further provisions shall for
all purposes have the same effect as if set forth at this place.

            Unless this  Certificate  has been  countersigned  by an  authorized
officer of the  Trustee,  by manual  signature,  this  Certificate  shall not be
entitled to any benefit under the Agreement or be valid for any purpose.


<PAGE>



            IN WITNESS  WHEREOF,  the Trustee has caused this  Certificate to be
duly executed as of the date set forth below.

Dated:

                                                First Union National Bank,
                                                   Trustee


                                                By
                                                  ------------------------------
                                                  Authorized Officer

Countersigned:

First Union National Bank,
   Trustee


By
  ------------------------------
  Authorized Officer


<PAGE>

                                   EXHIBIT B-1
                     [FORM OF FACE OF CLASS B-1 CERTIFICATE]

THIS CERTIFICATE IS SUBORDINATED IN RIGHT OF PAYMENT TO THE CLASS A CERTIFICATES
AS DESCRIBED IN THE POOLING AND SERVICING AGREEMENT REFERRED TO HEREIN.

EXCEPT AS PROVIDED IN SECTION  5.02(C) OF THE  POOLING AND  SERVICING  AGREEMENT
REFERRED TO HEREIN,  THIS  CERTIFICATE MAY NOT BE PURCHASED BY OR TRANSFERRED TO
ANY PERSON THAT HAS NOT DELIVERED A  REPRESENTATION  LETTER  STATING  EITHER (A)
THAT  THE  TRANSFEREE  IS NOT AN  EMPLOYEE  BENEFIT  PLAN  OR  OTHER  RETIREMENT
ARRANGEMENT SUBJECT TO TITLE I OF THE EMPLOYEE RETIREMENT INCOME SECURITY ACT OF
1974,  AS AMENDED  ("ERISA"),  OR SECTION 4975 OF THE  INTERNAL  REVENUE CODE OF
1986, AS AMENDED (THE  "CODE"),  OR A  GOVERNMENTAL  PLAN, AS DEFINED IN SECTION
3(32) OF  ERISA,  SUBJECT  TO ANY  FEDERAL,  STATE OR LOCAL  LAW  WHICH IS, TO A
MATERIAL  EXTENT,  SIMILAR  TO THE  FOREGOING  PROVISIONS  OF  ERISA OR THE CODE
(COLLECTIVELY, A "PLAN"), AND IS NOT ACTING ON BEHALF OF OR INVESTING THE ASSETS
OF A PLAN OR (B)  SUBJECT TO CERTAIN  CONDITIONS  SET FORTH IN THE  POOLING  AND
SERVICING AGREEMENT,  THAT THE SOURCE OF FUNDS USED TO PURCHASE THIS CERTIFICATE
IS AN "INSURANCE COMPANY GENERAL ACCOUNT."


<PAGE>



                        MORTGAGE PASS-THROUGH CERTIFICATE
                            SERIES 1999-16, CLASS B-1

     evidencing an interest in a pool of fixed interest rate, conventional,
         monthly pay, fully amortizing, first lien, one- to four-family
         residential mortgage loans, which may include loans secured by
           shares issued by cooperative housing corporations, sold by

                      NORWEST ASSET SECURITIES CORPORATION
                (Not an interest in or obligation of the Seller)

            THIS  CERTIFICATE DOES NOT EVIDENCE AN OBLIGATION OF, OR AN INTEREST
IN, THE SELLER, THE MASTER SERVICER, THE TRUSTEE OR ANY OF THEIR AFFILIATES, AND
IS NOT INSURED OR GUARANTEED BY THE SELLER, THE MASTER SERVICER,  THE TRUSTEE OR
ANY OF THEIR AFFILIATES, OR BY ANY GOVERNMENT AGENCY OR PRIVATE INSURER.

            DISTRIBUTIONS  IN  REDUCTION  OF  THE  PRINCIPAL   BALANCE  OF  THIS
CERTIFICATE  WILL BE MADE IN THE MANNER  DESCRIBED IN THE POOLING AND  SERVICING
AGREEMENT. ACCORDINGLY, THE OUTSTANDING PRINCIPAL BALANCE OF THIS CERTIFICATE AT
ANY TIME MAY BE LESS THAN THE INITIAL PRINCIPAL BALANCE REPRESENTED HEREBY.

Certificate No.                          Cut-Off Date: May 1, 1999

CUSIP No.:                               First Distribution Date: June 25, 1999

Percentage Interest evidenced            Denomination: $
by this Certificate: %

Final Scheduled Maturity Date:           June 25, 2029


<PAGE>



            THIS CERTIFIES THAT  ____________________________  is the registered
owner of the  Percentage  Interest  evidenced  by this  Certificate  in  monthly
distributions  to the Holders of the Class B-1  Certificates  with  respect to a
Trust Estate consisting of a pool of fixed interest rate, conventional,  monthly
pay, fully  amortizing,  first lien,  one- to four-family  residential  mortgage
loans,  other than the Fixed Retained Yield, if any, with respect  thereto,  and
which may  include  loans  secured  by  shares  issued  by  cooperative  housing
corporations   (the  "Mortgage   Loans")  formed  by  Norwest  Asset  Securities
Corporation  (hereinafter called the "Seller", which term includes any successor
entity  under the  Agreement  referred to below).  The Trust  Estate was created
pursuant  to a Pooling  and  Servicing  Agreement  dated as of May 28, 1999 (the
"Agreement") among the Seller, Norwest Bank Minnesota,  National Association, as
master  servicer  (the "Master  Servicer")  and First Union  National  Bank,  as
trustee (the  "Trustee"),  a summary of certain of the  pertinent  provisions of
which  is  set  forth  hereinafter.  To  the  extent  not  defined  herein,  the
capitalized  terms used herein have the  meanings  ascribed to such terms in the
Agreement.  This  Certificate  is issued  under  and is  subject  to the  terms,
provisions  and conditions of the  Agreement,  to which  Agreement the Holder of
this  Certificate by virtue of the  acceptance  hereof assents and by which such
Holder is bound.

            Pursuant to the terms of the Agreement,  a distribution will be made
on the 25th day of each  month or, if such 25th day is not a Business  Day,  the
Business Day immediately following (the "Distribution Date"),  commencing on the
first  Distribution  Date  specified  above,  to the  Person in whose  name this
Certificate  is  registered at the close of business on the last Business Day of
the month  preceding the month of such  distribution,  in an amount equal to the
product of the Percentage Interest evidenced by this Certificate and, subject to
the prior rights of the Class A Certificates as specified in the Agreement,  any
Class B-1 Distribution Amount required to be distributed to Holders of the Class
B-1 Certificates on such Distribution  Date,  subject to adjustment,  in certain
events,  as specified in the Agreement.  The pass-through  rate on the Class B-1
Certificates  applicable to each Distribution Date will be 6.500% per annum. The
amount of  interest  which  accrues  on this  Certificate  in any month  will be
subject to reduction with respect to any  Non-Supported  Interest  Shortfall and
the  interest  portion of certain  Realized  Losses  allocated  to the Class B-1
Certificates, as described in the Agreement.

            Distributions  on this  Certificate  will be made on  behalf  of the
Trustee  either by the Master  Servicer or by a Paying  Agent  appointed  by the
Master Servicer by check mailed to the address of the Person  entitled  thereto,
as such name and address shall appear on the Certificate  Register,  unless such
Person is entitled to receive payments by wire transfer in immediately available
funds in accordance with the Pooling and Servicing Agreement and such Person has
notified the Master  Servicer  pursuant to the Pooling and  Servicing  Agreement
that such  payments  are to be made by wire  transfer of  immediately  available
funds.  Notwithstanding  the above,  the final  distribution in reduction of the
Principal  Balance  of this  Certificate  will be made  after due  notice of the
pendency of such  distribution and only upon  presentation and surrender of this
Certificate at the office or agency specified by the Trustee for that purpose in
the notice of final distribution.

            No  transfer  of a Class B-1  Certificate  will be made  unless  the
Holder hereof  desiring to make any such  transfer  shall deliver to the Trustee
(i) a representation letter, in the form as described in the Agreement,  stating
either  (a) that the  transferee  is not a Plan and is not acting on behalf of a
Plan or using the assets of a Plan to effect  such  purchase  or (b)  subject to
certain conditions described in the Agreement,  that the source of funds used to
purchase this Certificate is an "insurance  company general account," or (ii) if
such  transferee is a Plan, (a) an opinion of counsel  acceptable to and in form
and substance satisfactory to the Trustee and the Seller with respect to certain
matters and (b) such other  documentation  as the Seller or the Master  Servicer
may require, as described in the Agreement.

            Reference  is  hereby  made  to  the  further   provisions  of  this
Certificate set forth on the reverse hereof,  which further provisions shall for
all purposes have the same effect as if set forth at this place.

            This  Certificate  is issued on May 28, 1999, and based on its issue
price of 96.98750%, including accrued interest, and a stated redemption price at
maturity equal to its initial  principal balance (plus 3 days of interest at the
pass-through  rate hereon),  is issued with original issue discount  ("OID") for
federal income tax purposes.  Assuming that this  Certificate pays in accordance
with projected cash flows  reflecting the prepayment  assumption of 275% SPA (as
defined in the  Prospectus  Supplement  dated May 21,  1999 with  respect to the
offering of the Class A Certificates (except the Class A-PO Certificates), Class
B-1, Class B-2 and Class B-3 Certificates)  used to price this Certificate:  (i)
the  amount of OID as a  percentage  of the  initial  principal  balance of this
Certificate is approximately  3.06666667%;  (ii) the annual yield to maturity of
this  Certificate,  compounded  monthly,  is approximately  6.92%; and (iii) the
amount of OID allocable to the short first accrual  period (May 28, 1999 to June
25, 1999) as a percentage of the initial  principal balance of this Certificate,
calculated using the exact method, is approximately 0.01597185%.

            This Certificate  constitutes a "regular interest" in a "real estate
mortgage  investment  conduit" as those terms are defined in Section  860G(a)(1)
and  Section  860D,  respectively,  of the  Internal  Revenue  Code of 1986,  as
amended.

            Unless this  Certificate  has been  countersigned  by an  authorized
officer of the  Trustee,  by manual  signature,  this  Certificate  shall not be
entitled to any benefit under the Agreement or be valid for any purpose.


<PAGE>



            IN WITNESS  WHEREOF,  the Trustee has caused this  Certificate to be
duly executed as of the date set forth below.

Dated:

                                                First Union National Bank,
                                                   Trustee


                                                By
                                                  ------------------------------
                                                  Authorized Officer

Countersigned:

First Union National Bank,
   Trustee


By
  ------------------------------
  Authorized Officer


<PAGE>

                                   EXHIBIT B-2
                     [FORM OF FACE OF CLASS B-2 CERTIFICATE]

THIS CERTIFICATE IS SUBORDINATED IN RIGHT OF PAYMENT TO THE CLASS A CERTIFICATES
AND THE CLASS  B-1  CERTIFICATES  AS  DESCRIBED  IN THE  POOLING  AND  SERVICING
AGREEMENT REFERRED TO HEREIN.

EXCEPT AS PROVIDED IN SECTION  5.02(C) OF THE  POOLING AND  SERVICING  AGREEMENT
REFERRED TO HEREIN,  THIS  CERTIFICATE MAY NOT BE PURCHASED BY OR TRANSFERRED TO
ANY PERSON THAT HAS NOT DELIVERED A  REPRESENTATION  LETTER  STATING  EITHER (A)
THAT  THE  TRANSFEREE  IS NOT AN  EMPLOYEE  BENEFIT  PLAN  OR  OTHER  RETIREMENT
ARRANGEMENT SUBJECT TO TITLE I OF THE EMPLOYEE RETIREMENT INCOME SECURITY ACT OF
1974,  AS AMENDED  ("ERISA"),  OR SECTION 4975 OF THE  INTERNAL  REVENUE CODE OF
1986, AS AMENDED (THE  "CODE"),  OR A  GOVERNMENTAL  PLAN, AS DEFINED IN SECTION
3(32) OF  ERISA,  SUBJECT  TO ANY  FEDERAL,  STATE OR LOCAL  LAW  WHICH IS, TO A
MATERIAL  EXTENT,  SIMILAR  TO THE  FOREGOING  PROVISIONS  OF  ERISA OR THE CODE
(COLLECTIVELY, A "PLAN"), AND IS NOT ACTING ON BEHALF OF OR INVESTING THE ASSETS
OF A PLAN OR (B)  SUBJECT TO CERTAIN  CONDITIONS  SET FORTH IN THE  POOLING  AND
SERVICING AGREEMENT,  THAT THE SOURCE OF FUNDS USED TO PURCHASE THIS CERTIFICATE
IS AN "INSURANCE COMPANY GENERAL ACCOUNT."


<PAGE>

                        MORTGAGE PASS-THROUGH CERTIFICATE
                            SERIES 1999-16, CLASS B-2

     evidencing an interest in a pool of fixed interest rate, conventional,
         monthly pay, fully amortizing, first lien, one- to four-family
         residential mortgage loans, which may include loans secured by
           shares issued by cooperative housing corporations, sold by

                      NORWEST ASSET SECURITIES CORPORATION
                (Not an interest in or obligation of the Seller)

            THIS  CERTIFICATE DOES NOT EVIDENCE AN OBLIGATION OF, OR AN INTEREST
IN, THE SELLER, THE MASTER SERVICER, THE TRUSTEE OR ANY OF THEIR AFFILIATES, AND
IS NOT INSURED OR GUARANTEED BY THE SELLER, THE MASTER SERVICER,  THE TRUSTEE OR
ANY OF THEIR AFFILIATES, OR BY ANY GOVERNMENT AGENCY OR PRIVATE INSURER.

            DISTRIBUTIONS  IN  REDUCTION  OF  THE  PRINCIPAL   BALANCE  OF  THIS
CERTIFICATE  WILL BE MADE IN THE MANNER  DESCRIBED IN THE POOLING AND  SERVICING
AGREEMENT. ACCORDINGLY, THE OUTSTANDING PRINCIPAL BALANCE OF THIS CERTIFICATE AT
ANY TIME MAY BE LESS THAN THE INITIAL PRINCIPAL BALANCE REPRESENTED HEREBY.

Certificate No.                          Cut-Off Date: May 1, 1999

CUSIP No.:                               First Distribution Date: June 25, 1999

Percentage Interest evidenced            Denomination: $
by this Certificate: %

Final Scheduled Maturity Date:           June 25, 2029

<PAGE>


            THIS CERTIFIES THAT  ____________________________  is the registered
owner of the  Percentage  Interest  evidenced  by this  Certificate  in  monthly
distributions  to the Holders of the Class B-2  Certificates  with  respect to a
Trust Estate consisting of a pool of fixed interest rate, conventional,  monthly
pay, fully  amortizing,  first lien,  one- to four-family  residential  mortgage
loans,  other than the Fixed Retained Yield, if any, with respect  thereto,  and
which may  include  loans  secured  by  shares  issued  by  cooperative  housing
corporations   (the  "Mortgage   Loans")  formed  by  Norwest  Asset  Securities
Corporation  (hereinafter called the "Seller", which term includes any successor
entity  under the  Agreement  referred to below).  The Trust  Estate was created
pursuant  to a Pooling  and  Servicing  Agreement  dated as of May 28, 1999 (the
"Agreement") among the Seller, Norwest Bank Minnesota,  National Association, as
master  servicer  (the "Master  Servicer")  and First Union  National  Bank,  as
trustee (the  "Trustee"),  a summary of certain of the  pertinent  provisions of
which  is  set  forth  hereinafter.  To  the  extent  not  defined  herein,  the
capitalized  terms used herein have the  meanings  ascribed to such terms in the
Agreement.  This  Certificate  is issued  under  and is  subject  to the  terms,
provisions  and conditions of the  Agreement,  to which  Agreement the Holder of
this  Certificate by virtue of the  acceptance  hereof assents and by which such
Holder is bound.

            Pursuant to the terms of the Agreement,  a distribution will be made
on the 25th day of each  month or, if such 25th day is not a Business  Day,  the
Business Day immediately following (the "Distribution Date"),  commencing on the
first  Distribution  Date  specified  above,  to the  Person in whose  name this
Certificate  is  registered at the close of business on the last Business Day of
the month  preceding the month of such  distribution,  in an amount equal to the
product of the Percentage Interest evidenced by this Certificate and, subject to
the  prior  rights  of the  Class A  Certificates  and  each  Class  of  Class B
Certificates  bearing  a  lower  numerical   designation  as  specified  in  the
Agreement,  any Class B-2  Distribution  Amount  required to be  distributed  to
Holders of the Class B-2  Certificates  on such  Distribution  Date,  subject to
adjustment,  in certain events, as specified in the Agreement.  The pass-through
rate on the Class B-2 Certificates  applicable to each Distribution Date will be
6.500% per annum.  The amount of interest  which accrues on this  Certificate in
any month  will be  subject  to  reduction  with  respect  to any  Non-Supported
Interest Shortfall and the interest portion of certain Realized Losses allocated
to the Class B-2 Certificates, as described in the Agreement.

            Distributions  on this  Certificate  will be made on  behalf  of the
Trustee  either by the Master  Servicer or by a Paying  Agent  appointed  by the
Master Servicer by check mailed to the address of the Person  entitled  thereto,
as such name and address shall appear on the Certificate  Register,  unless such
Person is entitled to receive payments by wire transfer in immediately available
funds in accordance with the Pooling and Servicing Agreement and such Person has
notified the Master  Servicer  pursuant to the Pooling and  Servicing  Agreement
that such  payments  are to be made by wire  transfer of  immediately  available
funds.  Notwithstanding  the above,  the final  distribution in reduction of the
Principal  Balance  of this  Certificate  will be made  after due  notice of the
pendency of such  distribution and only upon  presentation and surrender of this
Certificate at the office or agency specified by the Trustee for that purpose in
the notice of final distribution.

            No  transfer  of a Class B-2  Certificate  will be made  unless  the
Holder hereof  desiring to make any such  transfer  shall deliver to the Trustee
(i) a representation letter, in the form as described in the Agreement,  stating
either  (a) that the  transferee  is not a Plan and is not acting on behalf of a
Plan or using the assets of a Plan to effect  such  purchase  or (b)  subject to
certain conditions described in the Agreement,  that the source of funds used to
purchase this Certificate is an "insurance  company general account," or (ii) if
such  transferee is a Plan, (a) an opinion of counsel  acceptable to and in form
and substance satisfactory to the Trustee and the Seller with respect to certain
matters and (b) such other  documentation  as the Seller or the Master  Servicer
may require, as described in the Agreement.

            Reference  is  hereby  made  to  the  further   provisions  of  this
Certificate set forth on the reverse hereof,  which further provisions shall for
all purposes have the same effect as if set forth at this place.

            This  Certificate  is issued on May 28, 1999, and based on its issue
price of 94.95625%, including accrued interest, and a stated redemption price at
maturity equal to its initial  principal balance (plus 3 days of interest at the
pass-through  rate hereon),  is issued with original issue discount  ("OID") for
federal income tax purposes.  Assuming that this  Certificate pays in accordance
with projected cash flows  reflecting the prepayment  assumption of 275% SPA (as
defined in the  Prospectus  Supplement  dated May 21,  1999 with  respect to the
offering of the Class A Certificates (except the Class A-PO Certificates), Class
B-1, Class B-2 and Class B-3 Certificates)  used to price this Certificate:  (i)
the  amount of OID as a  percentage  of the  initial  principal  balance of this
Certificate is approximately  5.09791667%;  (ii) the annual yield to maturity of
this  Certificate,  compounded  monthly,  is approximately  7.21%; and (iii) the
amount of OID allocable to the short first accrual  period (May 28, 1999 to June
25, 1999) as a percentage of the initial  principal balance of this Certificate,
calculated using the exact method, is approximately 0.02614544%.

            This Certificate  constitutes a "regular interest" in a "real estate
mortgage  investment  conduit" as those terms are defined in Section  860G(a)(1)
and  Section  860D,  respectively,  of the  Internal  Revenue  Code of 1986,  as
amended.

            Unless this  Certificate  has been  countersigned  by an  authorized
officer of the  Trustee,  by manual  signature,  this  Certificate  shall not be
entitled to any benefit under the Agreement or be valid for any purpose.


<PAGE>



            IN WITNESS  WHEREOF,  the Trustee has caused this  Certificate to be
duly executed as of the date set forth below.

Dated:

                                                First Union National Bank,
                                                   Trustee


                                                By
                                                  ------------------------------
                                                  Authorized Officer

Countersigned:

First Union National Bank,
   Trustee


By
  ------------------------------
  Authorized Officer


<PAGE>

                                   EXHIBIT B-3
                     [FORM OF FACE OF CLASS B-3 CERTIFICATE]

THIS   CERTIFICATE  IS   SUBORDINATED  IN  RIGHT  OF  PAYMENT  TO  THE  CLASS  A
CERTIFICATES,  THE CLASS B-1  CERTIFICATES  AND THE  CLASS B-2  CERTIFICATES  AS
DESCRIBED IN THE POOLING AND SERVICING AGREEMENT REFERRED TO HEREIN.

EXCEPT AS PROVIDED IN SECTION  5.02(C) OF THE  POOLING AND  SERVICING  AGREEMENT
REFERRED TO HEREIN,  THIS  CERTIFICATE MAY NOT BE PURCHASED BY OR TRANSFERRED TO
ANY PERSON THAT HAS NOT DELIVERED A  REPRESENTATION  LETTER  STATING  EITHER (A)
THAT  THE  TRANSFEREE  IS NOT AN  EMPLOYEE  BENEFIT  PLAN  OR  OTHER  RETIREMENT
ARRANGEMENT SUBJECT TO TITLE I OF THE EMPLOYEE RETIREMENT INCOME SECURITY ACT OF
1974,  AS AMENDED  ("ERISA"),  OR SECTION 4975 OF THE  INTERNAL  REVENUE CODE OF
1986, AS AMENDED (THE  "CODE"),  OR A  GOVERNMENTAL  PLAN, AS DEFINED IN SECTION
3(32) OF  ERISA,  SUBJECT  TO ANY  FEDERAL,  STATE OR LOCAL  LAW  WHICH IS, TO A
MATERIAL  EXTENT,  SIMILAR  TO THE  FOREGOING  PROVISIONS  OF  ERISA OR THE CODE
(COLLECTIVELY, A "PLAN"), AND IS NOT ACTING ON BEHALF OF OR INVESTING THE ASSETS
OF A PLAN OR (B)  SUBJECT TO CERTAIN  CONDITIONS  SET FORTH IN THE  POOLING  AND
SERVICING AGREEMENT,  THAT THE SOURCE OF FUNDS USED TO PURCHASE THIS CERTIFICATE
IS AN "INSURANCE COMPANY GENERAL ACCOUNT."


<PAGE>



                        MORTGAGE PASS-THROUGH CERTIFICATE
                            SERIES 1999-16, CLASS B-3

                    evidencing an interest in a pool of fixed
                    interest rate, conventional, monthly pay,
                      fully amortizing, first lien, one- to
                four-family residential mortgage loans, which may
                    include loans secured by shares issued by
                    cooperative housing corporations, sold by

                      NORWEST ASSET SECURITIES CORPORATION
                (Not an interest in or obligation of the Seller)

            THIS  CERTIFICATE DOES NOT EVIDENCE AN OBLIGATION OF, OR AN INTEREST
IN, THE SELLER, THE MASTER SERVICER, THE TRUSTEE OR ANY OF THEIR AFFILIATES, AND
IS NOT INSURED OR GUARANTEED BY THE SELLER, THE MASTER SERVICER,  THE TRUSTEE OR
ANY OF THEIR AFFILIATES, OR BY ANY GOVERNMENT AGENCY OR PRIVATE INSURER.

            DISTRIBUTIONS  IN  REDUCTION  OF  THE  PRINCIPAL   BALANCE  OF  THIS
CERTIFICATE  WILL BE MADE IN THE MANNER  DESCRIBED IN THE POOLING AND  SERVICING
AGREEMENT. ACCORDINGLY, THE OUTSTANDING PRINCIPAL BALANCE OF THIS CERTIFICATE AT
ANY TIME MAY BE LESS THAN THE INITIAL PRINCIPAL BALANCE REPRESENTED HEREBY.

Certificate No.                           Cut-Off Date: May 1, 1999

CUSIP No.:                                First Distribution Date: June 25, 1999

Percentage Interest evidenced             Denomination: $
by this Certificate: %

Final Scheduled Maturity Date:            June 25, 2029



<PAGE>



            THIS   CERTIFIES   THAT   _______________________________   is   the
registered  owner of the Percentage  Interest  evidenced by this  Certificate in
monthly  distributions to the Holders of the Class B-3 Certificates with respect
to a Trust Estate  consisting of a pool of fixed  interest  rate,  conventional,
monthly pay,  fully  amortizing,  first lien,  one- to  four-family  residential
mortgage  loans,  other than the Fixed  Retained  Yield,  if any,  with  respect
thereto,  and which may include loans  secured by shares  issued by  cooperative
housing  corporations  (the "Mortgage Loans") formed by Norwest Asset Securities
Corporation  (hereinafter called the "Seller", which term includes any successor
entity  under the  Agreement  referred to below).  The Trust  Estate was created
pursuant  to a Pooling  and  Servicing  Agreement  dated as of May 28, 1999 (the
"Agreement") among the Seller, Norwest Bank Minnesota,  National Association, as
master  servicer  (the "Master  Servicer")  and First Union  National  Bank,  as
trustee (the  "Trustee"),  a summary of certain of the  pertinent  provisions of
which  is  set  forth  hereinafter.  To  the  extent  not  defined  herein,  the
capitalized  terms used herein have the  meanings  ascribed to such terms in the
Agreement.  This  Certificate  is issued  under  and is  subject  to the  terms,
provisions  and conditions of the  Agreement,  to which  Agreement the Holder of
this  Certificate by virtue of the  acceptance  hereof assents and by which such
Holder is bound.

            Pursuant to the terms of the Agreement,  a distribution will be made
on the 25th day of each  month or, if such 25th day is not a Business  Day,  the
Business Day immediately following (the "Distribution Date"),  commencing on the
first  Distribution  Date  specified  above,  to the  Person in whose  name this
Certificate  is  registered at the close of business on the last Business Day of
the month  preceding the month of such  distribution,  in an amount equal to the
product of the Percentage Interest evidenced by this Certificate and, subject to
the  prior  rights  of the  Class A  Certificates  and  each  Class  of  Class B
Certificates  bearing  a  lower  numerical   designation  as  specified  in  the
Agreement,  any Class B-3  Distribution  Amount  required to be  distributed  to
Holders of the Class B-3  Certificates  on such  Distribution  Date,  subject to
adjustment,  in certain events, as specified in the Agreement.  The pass-through
rate on the Class B-3 Certificates  applicable to each Distribution Date will be
6.500% per annum.  The amount of interest  which accrues on this  Certificate in
any month  will be  subject  to  reduction  with  respect  to any  Non-Supported
Interest Shortfall and the interest portion of certain Realized Losses allocated
to the Class B-3 Certificates, as described in the Agreement.

            Distributions  on this  Certificate  will be made on  behalf  of the
Trustee  either by the Master  Servicer or by a Paying  Agent  appointed  by the
Master Servicer by check mailed to the address of the Person  entitled  thereto,
as such name and address shall appear on the Certificate  Register,  unless such
Person is entitled to receive payments by wire transfer in immediately available
funds in accordance with the Pooling and Servicing Agreement and such Person has
notified the Master  Servicer  pursuant to the Pooling and  Servicing  Agreement
that such  payments  are to be made by wire  transfer of  immediately  available
funds.  Notwithstanding  the above,  the final  distribution in reduction of the
Principal  Balance  of this  Certificate  will be made  after due  notice of the
pendency of such  distribution and only upon  presentation and surrender of this
Certificate at the office or agency specified by the Trustee for that purpose in
the notice of final distribution.

            No  transfer  of a Class B-3  Certificate  will be made  unless  the
Holder hereof  desiring to make any such  transfer  shall deliver to the Trustee
(i) a representation letter, in the form as described in the Agreement,  stating
either  (a) that the  transferee  is not a Plan and is not acting on behalf of a
Plan or using the assets of a Plan to effect  such  purchase  or (b)  subject to
certain conditions described in the Agreement,  that the source of funds used to
purchase this Certificate is an "insurance  company general account," or (ii) if
such  transferee is a Plan, (a) an opinion of counsel  acceptable to and in form
and substance satisfactory to the Trustee and the Seller with respect to certain
matters and (b) such other  documentation  as the Seller or the Master  Servicer
may require, as described in the Agreement.

            Reference  is  hereby  made  to  the  further   provisions  of  this
Certificate set forth on the reverse hereof,  which further provisions shall for
all purposes have the same effect as if set forth at this place.

            This  Certificate  is issued on May 28, 1999, and based on its issue
price of 89.28438%, including accrued interest, and a stated redemption price at
maturity equal to its initial  principal balance (plus 3 days of interest at the
pass-through  rate hereon),  is issued with original issue discount  ("OID") for
federal income tax purposes.  Assuming that this  Certificate pays in accordance
with projected cash flows  reflecting the prepayment  assumption of 275% SPA (as
defined in the  Prospectus  Supplement  dated May 21,  1999 with  respect to the
offering of the Class A Certificates (except the Class A-PO Certificates), Class
B-1, Class B-2 and Class B-3 Certificates)  used to price this Certificate:  (i)
the  amount of OID as a  percentage  of the  initial  principal  balance of this
Certificate is approximately 10.76979167%;  (ii) the annual yield to maturity of
this  Certificate,  compounded  monthly,  is approximately  8.08%; and (iii) the
amount of OID allocable to the short first accrual  period (May 28, 1999 to June
25, 1999) as a percentage of the initial  principal balance of this Certificate,
calculated using the exact method, is approximately 0.05314773%.

            This Certificate  constitutes a "regular interest" in a "real estate
mortgage  investment  conduit" as those terms are defined in Section  860G(a)(1)
and  Section  860D,  respectively,  of the  Internal  Revenue  Code of 1986,  as
amended.

            Unless this  Certificate  has been  countersigned  by an  authorized
officer of the  Trustee,  by manual  signature,  this  Certificate  shall not be
entitled to any benefit under the Agreement or be valid for any purpose.


<PAGE>



            IN WITNESS  WHEREOF,  the Trustee has caused this  Certificate to be
duly executed as of the date set forth below.

Dated:

                                                First Union National Bank,
                                                   Trustee


                                                By
                                                  ------------------------------
                                                  Authorized Officer

Countersigned:

First Union National Bank,
   Trustee


By
  ------------------------------
  Authorized Officer


<PAGE>

                                   EXHIBIT B-4
                     [FORM OF FACE OF CLASS B-4 CERTIFICATE]

THIS   CERTIFICATE  IS   SUBORDINATED  IN  RIGHT  OF  PAYMENT  TO  THE  CLASS  A
CERTIFICATES,  THE CLASS B-1  CERTIFICATES,  THE CLASS B-2  CERTIFICATES AND THE
CLASS B-3  CERTIFICATES  AS  DESCRIBED  IN THE POOLING AND  SERVICING  AGREEMENT
REFERRED TO HEREIN.

THIS  CERTIFICATE  HAS NOT BEEN AND WILL NOT BE REGISTERED  UNDER THE SECURITIES
ACT OF 1933,  AS  AMENDED,  OR THE  SECURITIES  LAWS OF ANY STATE AND MAY NOT BE
RESOLD OR TRANSFERRED  UNLESS IT IS REGISTERED  PURSUANT TO SUCH ACT AND LAWS OR
IS SOLD OR TRANSFERRED IN TRANSACTIONS  WHICH ARE EXEMPT FROM REGISTRATION UNDER
SUCH ACT AND UNDER  APPLICABLE  STATE LAW AND IS TRANSFERRED IN ACCORDANCE  WITH
THE PROVISIONS OF SECTION 5.02 OF THE POOLING AND SERVICING  AGREEMENT  REFERRED
TO HEREIN.

EXCEPT AS PROVIDED IN SECTION  5.02(C) OF THE  POOLING AND  SERVICING  AGREEMENT
REFERRED TO HEREIN,  THIS  CERTIFICATE MAY NOT BE PURCHASED BY OR TRANSFERRED TO
ANY PERSON THAT HAS NOT DELIVERED A  REPRESENTATION  LETTER  STATING  EITHER (A)
THAT  THE  TRANSFEREE  IS NOT AN  EMPLOYEE  BENEFIT  PLAN  OR  OTHER  RETIREMENT
ARRANGEMENT SUBJECT TO TITLE I OF THE EMPLOYEE RETIREMENT INCOME SECURITY ACT OF
1974,  AS AMENDED  ("ERISA"),  OR SECTION 4975 OF THE  INTERNAL  REVENUE CODE OF
1986, AS AMENDED (THE  "CODE"),  OR A  GOVERNMENTAL  PLAN, AS DEFINED IN SECTION
3(32) OF  ERISA,  SUBJECT  TO ANY  FEDERAL,  STATE OR LOCAL  LAW  WHICH IS, TO A
MATERIAL  EXTENT,  SIMILAR  TO THE  FOREGOING  PROVISIONS  OF  ERISA OR THE CODE
(COLLECTIVELY, A "PLAN"), AND IS NOT ACTING ON BEHALF OF OR INVESTING THE ASSETS
OF A PLAN OR (B)  SUBJECT TO CERTAIN  CONDITIONS  SET FORTH IN THE  POOLING  AND
SERVICING AGREEMENT,  THAT THE SOURCE OF FUNDS USED TO PURCHASE THIS CERTIFICATE
IS AN "INSURANCE COMPANY GENERAL ACCOUNT."


<PAGE>


                        MORTGAGE PASS-THROUGH CERTIFICATE
                            SERIES 1999-16, CLASS B-4

     evidencing an interest in a pool of fixed interest rate, conventional,
         monthly pay, fully amortizing, first lien, one- to four-family
         residential mortgage loans, which may include loans secured by
           shares issued by cooperative housing corporations, sold by

                      NORWEST ASSET SECURITIES CORPORATION
                (Not an interest in or obligation of the Seller)

            THIS  CERTIFICATE DOES NOT EVIDENCE AN OBLIGATION OF, OR AN INTEREST
IN, THE SELLER, THE MASTER SERVICER, THE TRUSTEE OR ANY OF THEIR AFFILIATES, AND
IS NOT INSURED OR GUARANTEED BY THE SELLER, THE MASTER SERVICER,  THE TRUSTEE OR
ANY OF THEIR AFFILIATES, OR BY ANY GOVERNMENT AGENCY OR PRIVATE INSURER.

            DISTRIBUTIONS  IN  REDUCTION  OF  THE  PRINCIPAL   BALANCE  OF  THIS
CERTIFICATE  WILL BE MADE IN THE MANNER  DESCRIBED IN THE POOLING AND  SERVICING
AGREEMENT. ACCORDINGLY, THE OUTSTANDING PRINCIPAL BALANCE OF THIS CERTIFICATE AT
ANY TIME MAY BE LESS THAN THE INITIAL PRINCIPAL BALANCE REPRESENTED HEREBY.

Certificate No.                           Cut-Off Date: May 1, 1999

CUSIP No.:                                First Distribution Date: June 25, 1999

Percentage Interest evidenced             Denomination: $
by this Certificate: %

Final Scheduled Maturity Date:            June 25, 2029


<PAGE>



            THIS CERTIFIES THAT  ____________________________  is the registered
owner of the  Percentage  Interest  evidenced  by this  Certificate  in  monthly
distributions  to the Holders of the Class B-4  Certificates  with  respect to a
Trust Estate consisting of a pool of fixed interest rate, conventional,  monthly
pay, fully  amortizing,  first lien,  one- to four-family  residential  mortgage
loans,  other than the Fixed Retained Yield, if any, with respect  thereto,  and
which may  include  loans  secured  by  shares  issued  by  cooperative  housing
corporations   (the  "Mortgage   Loans")  formed  by  Norwest  Asset  Securities
Corporation  (hereinafter called the "Seller", which term includes any successor
entity  under the  Agreement  referred to below).  The Trust  Estate was created
pursuant  to a Pooling  and  Servicing  Agreement  dated as of May 28, 1999 (the
"Agreement") among the Seller, Norwest Bank Minnesota,  National Association, as
master  servicer  (the "Master  Servicer")  and First Union  National  Bank,  as
trustee (the  "Trustee"),  a summary of certain of the  pertinent  provisions of
which  is  set  forth  hereinafter.  To  the  extent  not  defined  herein,  the
capitalized  terms used herein have the  meanings  ascribed to such terms in the
Agreement.  This  Certificate  is issued  under  and is  subject  to the  terms,
provisions  and conditions of the  Agreement,  to which  Agreement the Holder of
this  Certificate by virtue of the  acceptance  hereof assents and by which such
Holder is bound.

            Pursuant to the terms of the Agreement,  a distribution will be made
on the 25th day of each  month or, if such 25th day is not a Business  Day,  the
Business Day immediately following (the "Distribution Date"),  commencing on the
first  Distribution  Date  specified  above,  to the  Person in whose  name this
Certificate  is  registered at the close of business on the last Business Day of
the month  preceding the month of such  distribution,  in an amount equal to the
product of the Percentage Interest evidenced by this Certificate and, subject to
the  prior  rights  of the  Class A  Certificates  and  each  Class  of  Class B
Certificates  bearing  a  lower  numerical   designation  as  specified  in  the
Agreement,  any Class B-4  Distribution  Amount  required to be  distributed  to
Holders of the Class B-4  Certificates  on such  Distribution  Date,  subject to
adjustment,  in certain events, as specified in the Agreement.  The pass-through
rate on the Class B-4 Certificates  applicable to each Distribution Date will be
6.500% per annum.  The amount of interest  which accrues on this  Certificate in
any month  will be  subject  to  reduction  with  respect  to any  Non-Supported
Interest Shortfall and the interest portion of certain Realized Losses allocated
to the Class B-4 Certificates, as described in the Agreement.

            Distributions  on this  Certificate  will be made on  behalf  of the
Trustee  either by the Master  Servicer or by a Paying  Agent  appointed  by the
Master Servicer by check mailed to the address of the Person  entitled  thereto,
as such name and address shall appear on the Certificate  Register,  unless such
Person is entitled to receive payments by wire transfer in immediately available
funds in accordance with the Pooling and Servicing Agreement and such Person has
notified the Master  Servicer  pursuant to the Pooling and  Servicing  Agreement
that such  payments  are to be made by wire  transfer of  immediately  available
funds.  Notwithstanding  the above,  the final  distribution in reduction of the
Principal  Balance  of this  Certificate  will be made  after due  notice of the
pendency of such  distribution and only upon  presentation and surrender of this
Certificate at the office or agency specified by the Trustee for that purpose in
the notice of final distribution.

            No  transfer  of a Class B-4  Certificate  will be made  unless such
transfer is exempt from the  registration  requirements of the Securities Act of
1933,  as  amended,  and  any  applicable  state  securities  laws or is made in
accordance  with said Act and laws. In the event that such a transfer is desired
to be made by the Holder hereof,  (i) the transferee will be required to execute
an  investment  letter in the form  described in the  Agreement and (ii) if such
transfer  is to be made  within  three  years  from the later of (a) the date of
initial issuance of the Certificates or (b) the last date on which the Seller or
any  affiliate  thereof  was  a  Holder  of  the  Certificates  proposed  to  be
transferred,  and unless  such  transfer is made in reliance on Rule 144A of the
Securities  Act of 1933,  as amended,  the Trustee or the Seller may require the
Holder to deliver an opinion of counsel  acceptable to and in form and substance
satisfactory  to the  Trustee  and the  Seller  that  such  transfer  is  exempt
(describing  the applicable  exemption and the basis  therefor) from or is being
made pursuant to the registration requirements of the Securities Act of 1933, as
amended,  and of any applicable statute of any state. The Holder hereof desiring
to effect such transfer shall,  and does hereby agree to, indemnify the Trustee,
the Seller,  the Master  Servicer,  and any Paying Agent acting on behalf of the
Trustee  against any liability  that may result if the transfer is not so exempt
or is not made in  accordance  with such Federal and state laws.  In  connection
with any such  transfer,  the Trustee  will also  require  (i) a  representation
letter,  in the form as described in the Agreement,  stating either (a) that the
transferee  is not a Plan and is not  acting  on  behalf  of a Plan or using the
assets of a Plan to effect such  purchase  or (b) subject to certain  conditions
described  in the  Agreement,  that the  source of funds used to  purchase  this
Certificate  is  an  "insurance  company  general  account,"  or  (ii)  if  such
transferee  is a Plan,  (a) an opinion of counsel  acceptable to and in form and
substance  satisfactory  to the Trustee  and the Seller with  respect to certain
matters and (b) such other  documentation  as the Seller or the Master  Servicer
may require, as described in the Agreement.

            Reference  is  hereby  made  to  the  further   provisions  of  this
Certificate set forth on the reverse hereof,  which further provisions shall for
all purposes have the same effect as if set forth at this place.

            This  Certificate  is issued on May 28, 1999, and based on its issue
price of 73.89375%, including accrued interest, and a stated redemption price at
maturity equal to its initial  principal balance (plus 3 days of interest at the
pass-through  rate hereon),  is issued with original issue discount  ("OID") for
federal income tax purposes.  Assuming that this  Certificate pays in accordance
with projected cash flows  reflecting the prepayment  assumption of 275% SPA (as
defined in the  Prospectus  Supplement  dated May 21,  1999 with  respect to the
offering of the Class A Certificates (except the Class A-PO Certificates), Class
B-1, Class B-2 and Class B-3 Certificates)  used to price this Certificate:  (i)
the  amount of OID as a  percentage  of the  initial  principal  balance of this
Certificate is approximately 26.16041667%;  (ii) the annual yield to maturity of
this Certificate,  compounded  monthly,  is approximately  10.87%; and (iii) the
amount of OID allocable to the short first accrual  period (May 28, 1999 to June
25, 1999) as a percentage of the initial  principal balance of this Certificate,
calculated using the exact method, is approximately 0.11486934%.

            This Certificate  constitutes a "regular interest" in a "real estate
mortgage  investment  conduit" as those terms are defined in Section  860G(a)(1)
and  Section  860D,  respectively,  of the  Internal  Revenue  Code of 1986,  as
amended.

            Unless this  Certificate  has been  countersigned  by an  authorized
officer of the  Trustee,  by manual  signature,  this  Certificate  shall not be
entitled to any benefit under the Agreement or be valid for any purpose.


<PAGE>



            IN WITNESS  WHEREOF,  the Trustee has caused this  Certificate to be
duly executed as of the date set forth below.

Dated:

                                                First Union National Bank,
                                                   Trustee


                                                By
                                                  ------------------------------
                                                  Authorized Officer

Countersigned:

First Union National Bank,
   Trustee


By
  ------------------------------
  Authorized Officer


<PAGE>

                                   EXHIBIT B-5
                     [FORM OF FACE OF CLASS B-5 CERTIFICATE]

THIS   CERTIFICATE  IS   SUBORDINATED  IN  RIGHT  OF  PAYMENT  TO  THE  CLASS  A
CERTIFICATES,  THE CLASS B-1 CERTIFICATES, THE CLASS B-2 CERTIFICATES, THE CLASS
B-3  CERTIFICATES AND THE CLASS B-4 CERTIFICATES AS DESCRIBED IN THE POOLING AND
SERVICING AGREEMENT REFERRED TO HEREIN.

THIS  CERTIFICATE  HAS NOT BEEN AND WILL NOT BE REGISTERED  UNDER THE SECURITIES
ACT OF 1933,  AS  AMENDED,  OR THE  SECURITIES  LAWS OF ANY STATE AND MAY NOT BE
RESOLD OR TRANSFERRED  UNLESS IT IS REGISTERED  PURSUANT TO SUCH ACT AND LAWS OR
IS SOLD OR TRANSFERRED IN TRANSACTIONS  WHICH ARE EXEMPT FROM REGISTRATION UNDER
SUCH ACT AND UNDER  APPLICABLE  STATE LAW AND IS TRANSFERRED IN ACCORDANCE  WITH
THE PROVISIONS OF SECTION 5.02 OF THE POOLING AND SERVICING  AGREEMENT  REFERRED
TO HEREIN.

EXCEPT AS PROVIDED IN SECTION  5.02(C) OF THE  POOLING AND  SERVICING  AGREEMENT
REFERRED TO HEREIN,  THIS  CERTIFICATE MAY NOT BE PURCHASED BY OR TRANSFERRED TO
ANY PERSON THAT HAS NOT DELIVERED A  REPRESENTATION  LETTER  STATING  EITHER (A)
THAT  THE  TRANSFEREE  IS NOT AN  EMPLOYEE  BENEFIT  PLAN  OR  OTHER  RETIREMENT
ARRANGEMENT SUBJECT TO TITLE I OF THE EMPLOYEE RETIREMENT INCOME SECURITY ACT OF
1974,  AS AMENDED  ("ERISA"),  OR SECTION 4975 OF THE  INTERNAL  REVENUE CODE OF
1986, AS AMENDED (THE  "CODE"),  OR A  GOVERNMENTAL  PLAN, AS DEFINED IN SECTION
3(32) OF  ERISA,  SUBJECT  TO ANY  FEDERAL,  STATE OR LOCAL  LAW  WHICH IS, TO A
MATERIAL  EXTENT,  SIMILAR  TO THE  FOREGOING  PROVISIONS  OF  ERISA OR THE CODE
(COLLECTIVELY, A "PLAN"), AND IS NOT ACTING ON BEHALF OF OR INVESTING THE ASSETS
OF A PLAN OR (B)  SUBJECT TO CERTAIN  CONDITIONS  SET FORTH IN THE  POOLING  AND
SERVICING AGREEMENT,  THAT THE SOURCE OF FUNDS USED TO PURCHASE THIS CERTIFICATE
IS AN "INSURANCE COMPANY GENERAL ACCOUNT."


<PAGE>



                        MORTGAGE PASS-THROUGH CERTIFICATE
                            SERIES 1999-16, CLASS B-5

     evidencing an interest in a pool of fixed interest rate, conventional,
         monthly pay, fully amortizing, first lien, one- to four-family
         residential mortgage loans, which may include loans secured by
           shares issued by cooperative housing corporations, sold by

                      NORWEST ASSET SECURITIES CORPORATION
                (Not an interest in or obligation of the Seller)

            THIS  CERTIFICATE DOES NOT EVIDENCE AN OBLIGATION OF, OR AN INTEREST
IN, THE SELLER, THE MASTER SERVICER, THE TRUSTEE OR ANY OF THEIR AFFILIATES, AND
IS NOT INSURED OR GUARANTEED BY THE SELLER, THE MASTER SERVICER,  THE TRUSTEE OR
ANY OF THEIR AFFILIATES, OR BY ANY GOVERNMENT AGENCY OR PRIVATE INSURER.

            DISTRIBUTIONS  IN  REDUCTION  OF  THE  PRINCIPAL   BALANCE  OF  THIS
CERTIFICATE  WILL BE MADE IN THE MANNER  DESCRIBED IN THE POOLING AND  SERVICING
AGREEMENT. ACCORDINGLY, THE OUTSTANDING PRINCIPAL BALANCE OF THIS CERTIFICATE AT
ANY TIME MAY BE LESS THAN THE INITIAL PRINCIPAL BALANCE REPRESENTED HEREBY.

Certificate No.                          Cut-Off Date: May 1, 1999

CUSIP No.:                               First Distribution Date: June 25, 1999

Percentage Interest evidenced            Denomination: $
by this Certificate: %

Final Scheduled Maturity Date:           June 25, 2029


<PAGE>



            THIS CERTIFIES THAT  ____________________________  is the registered
owner of the  Percentage  Interest  evidenced  by this  Certificate  in  monthly
distributions  to the Holders of the Class B-5  Certificates  with  respect to a
Trust Estate consisting of a pool of fixed interest rate, conventional,  monthly
pay, fully  amortizing,  first lien,  one- to four-family  residential  mortgage
loans,  other than the Fixed Retained Yield, if any, with respect  thereto,  and
which may  include  loans  secured  by  shares  issued  by  cooperative  housing
corporations   (the  "Mortgage   Loans")  formed  by  Norwest  Asset  Securities
Corporation  (hereinafter called the "Seller", which term includes any successor
entity  under the  Agreement  referred to below).  The Trust  Estate was created
pursuant  to a Pooling  and  Servicing  Agreement  dated as of May 28, 1999 (the
"Agreement") among the Seller, Norwest Bank Minnesota,  National Association, as
master  servicer  (the "Master  Servicer")  and First Union  National  Bank,  as
trustee (the  "Trustee"),  a summary of certain of the  pertinent  provisions of
which  is  set  forth  hereinafter.  To  the  extent  not  defined  herein,  the
capitalized  terms used herein have the  meanings  ascribed to such terms in the
Agreement.  This  Certificate  is issued  under  and is  subject  to the  terms,
provisions  and conditions of the  Agreement,  to which  Agreement the Holder of
this  Certificate by virtue of the  acceptance  hereof assents and by which such
Holder is bound.

            Pursuant to the terms of the Agreement,  a distribution will be made
on the 25th day of each  month or, if such 25th day is not a Business  Day,  the
Business Day immediately following (the "Distribution Date"),  commencing on the
first  Distribution  Date  specified  above,  to the  Person in whose  name this
Certificate  is  registered at the close of business on the last Business Day of
the month  preceding the month of such  distribution,  in an amount equal to the
product of the Percentage Interest evidenced by this Certificate and, subject to
the  prior  rights  of the  Class A  Certificates  and  each  Class  of  Class B
Certificates  bearing  a  lower  numerical   designation  as  specified  in  the
Agreement,  any Class B-5  Distribution  Amount  required to be  distributed  to
Holders of the Class B-5  Certificates  on such  Distribution  Date,  subject to
adjustment,  in certain events, as specified in the Agreement.  The pass-through
rate on the Class B-5 Certificates  applicable to each Distribution Date will be
6.500% per annum.  The amount of interest  which accrues on this  Certificate in
any month  will be  subject  to  reduction  with  respect  to any  Non-Supported
Interest Shortfall and the interest portion of certain Realized Losses allocated
to the Class B-5 Certificates, as described in the Agreement.

            Distributions  on this  Certificate  will be made on  behalf  of the
Trustee  either by the Master  Servicer or by a Paying  Agent  appointed  by the
Master Servicer by check mailed to the address of the Person  entitled  thereto,
as such name and address shall appear on the Certificate  Register,  unless such
Person is entitled to receive payments by wire transfer in immediately available
funds in accordance with the Pooling and Servicing Agreement and such Person has
notified the Master  Servicer  pursuant to the Pooling and  Servicing  Agreement
that such  payments  are to be made by wire  transfer of  immediately  available
funds.  Notwithstanding  the above,  the final  distribution in reduction of the
Principal  Balance  of this  Certificate  will be made  after due  notice of the
pendency of such  distribution and only upon  presentation and surrender of this
Certificate at the office or agency specified by the Trustee for that purpose in
the notice of final distribution.

            No  transfer  of a Class B-5  Certificate  will be made  unless such
transfer is exempt from the  registration  requirements of the Securities Act of
1933,  as  amended,  and  any  applicable  state  securities  laws or is made in
accordance  with said Act and laws. In the event that such a transfer is desired
to be made by the Holder hereof,  (i) the transferee will be required to execute
an  investment  letter in the form  described in the  Agreement and (ii) if such
transfer  is to be made  within  three  years  from the later of (a) the date of
initial issuance of the Certificates or (b) the last date on which the Seller or
any  affiliate  thereof  was  a  Holder  of  the  Certificates  proposed  to  be
transferred,  and unless  such  transfer is made in reliance on Rule 144A of the
Securities  Act of 1933,  as amended,  the Trustee or the Seller may require the
Holder to deliver an opinion of counsel  acceptable to and in form and substance
satisfactory  to the  Trustee  and the  Seller  that  such  transfer  is  exempt
(describing  the applicable  exemption and the basis  therefor) from or is being
made pursuant to the registration requirements of the Securities Act of 1933, as
amended,  and of any applicable statute of any state. The Holder hereof desiring
to effect such transfer shall,  and does hereby agree to, indemnify the Trustee,
the Seller,  the Master  Servicer,  and any Paying Agent acting on behalf of the
Trustee  against any liability  that may result if the transfer is not so exempt
or is not made in  accordance  with such Federal and state laws.  In  connection
with any such  transfer,  the Trustee  will also  require  (i) a  representation
letter,  in the form as described in the Agreement,  stating either (a) that the
transferee  is not a Plan and is not  acting  on  behalf  of a Plan or using the
assets of a Plan to effect such  purchase  or (b) subject to certain  conditions
described  in the  Agreement,  that the  source of funds used to  purchase  this
Certificate  is  an  "insurance  company  general  account,"  or  (ii)  if  such
transferee  is a Plan,  (a) an opinion of counsel  acceptable to and in form and
substance  satisfactory  to the Trustee  and the Seller with  respect to certain
matters and (b) such other  documentation  as the Seller or the Master  Servicer
may require, as described in the Agreement.

            Reference  is  hereby  made  to  the  further   provisions  of  this
Certificate set forth on the reverse hereof,  which further provisions shall for
all purposes have the same effect as if set forth at this place.

            This  Certificate  is issued on May 28, 1999, and based on its issue
price of 56.86250%, including accrued interest, and a stated redemption price at
maturity equal to its initial  principal balance (plus 3 days of interest at the
pass-through  rate hereon),  is issued with original issue discount  ("OID") for
federal income tax purposes.  Assuming that this  Certificate pays in accordance
with projected cash flows  reflecting the prepayment  assumption of 275% SPA (as
defined in the  Prospectus  Supplement  dated May 21,  1999 with  respect to the
offering of the Class A Certificates (except the Class A-PO Certificates), Class
B-1, Class B-2 and Class B-3 Certificates)  used to price this Certificate:  (i)
the  amount of OID as a  percentage  of the  initial  principal  balance of this
Certificate is approximately 43.19166667%;  (ii) the annual yield to maturity of
this Certificate,  compounded  monthly,  is approximately  15.18%; and (iii) the
amount of OID allocable to the short first accrual  period (May 28, 1999 to June
25, 1999) as a percentage of the initial  principal balance of this Certificate,
calculated using the exact method, is approximately 0.15945270%.

            This Certificate  constitutes a "regular interest" in a "real estate
mortgage  investment  conduit" as those terms are defined in Section  860G(a)(1)
and  Section  860D,  respectively,  of the  Internal  Revenue  Code of 1986,  as
amended.

            Unless this  Certificate  has been  countersigned  by an  authorized
officer of the  Trustee,  by manual  signature,  this  Certificate  shall not be
entitled to any benefit under the Agreement or be valid for any purpose.


<PAGE>



            IN WITNESS  WHEREOF,  the Trustee has caused this  Certificate to be
duly executed as of the date set forth below.

Dated:

                                                First Union National Bank,
                                                   Trustee


                                                By
                                                  ------------------------------
                                                  Authorized Officer

Countersigned:

First Union National Bank,
   Trustee


By
  ------------------------------
  Authorized Officer


<PAGE>

                                   EXHIBIT B-6
                     [FORM OF FACE OF CLASS B-6 CERTIFICATE]

THIS   CERTIFICATE  IS   SUBORDINATED  IN  RIGHT  OF  PAYMENT  TO  THE  CLASS  A
CERTIFICATES,  THE CLASS B-1 CERTIFICATES, THE CLASS B-2 CERTIFICATES, THE CLASS
B-3  CERTIFICATES,  THE CLASS B-4 CERTIFICATES AND THE CLASS B-5 CERTIFICATES AS
DESCRIBED IN THE POOLING AND SERVICING AGREEMENT REFERRED TO HEREIN.

THIS  CERTIFICATE  HAS NOT BEEN AND WILL NOT BE REGISTERED  UNDER THE SECURITIES
ACT OF 1933,  AS  AMENDED,  OR THE  SECURITIES  LAWS OF ANY STATE AND MAY NOT BE
RESOLD OR TRANSFERRED  UNLESS IT IS REGISTERED  PURSUANT TO SUCH ACT AND LAWS OR
IS SOLD OR TRANSFERRED IN TRANSACTIONS  WHICH ARE EXEMPT FROM REGISTRATION UNDER
SUCH ACT AND UNDER  APPLICABLE  STATE LAW AND IS TRANSFERRED IN ACCORDANCE  WITH
THE PROVISIONS OF SECTION 5.02 OF THE POOLING AND SERVICING  AGREEMENT  REFERRED
TO HEREIN.

EXCEPT AS PROVIDED IN SECTION  5.02(C) OF THE  POOLING AND  SERVICING  AGREEMENT
REFERRED TO HEREIN,  THIS  CERTIFICATE MAY NOT BE PURCHASED BY OR TRANSFERRED TO
ANY PERSON THAT HAS NOT DELIVERED A  REPRESENTATION  LETTER  STATING  EITHER (A)
THAT  THE  TRANSFEREE  IS NOT AN  EMPLOYEE  BENEFIT  PLAN  OR  OTHER  RETIREMENT
ARRANGEMENT SUBJECT TO TITLE I OF THE EMPLOYEE RETIREMENT INCOME SECURITY ACT OF
1974,  AS AMENDED  ("ERISA"),  OR SECTION 4975 OF THE  INTERNAL  REVENUE CODE OF
1986, AS AMENDED (THE  "CODE"),  OR A  GOVERNMENTAL  PLAN, AS DEFINED IN SECTION
3(32) OF  ERISA,  SUBJECT  TO ANY  FEDERAL,  STATE OR LOCAL  LAW  WHICH IS, TO A
MATERIAL  EXTENT,  SIMILAR  TO THE  FOREGOING  PROVISIONS  OF  ERISA OR THE CODE
(COLLECTIVELY, A "PLAN"), AND IS NOT ACTING ON BEHALF OF OR INVESTING THE ASSETS
OF A PLAN OR (B)  SUBJECT TO CERTAIN  CONDITIONS  SET FORTH IN THE  POOLING  AND
SERVICING AGREEMENT,  THAT THE SOURCE OF FUNDS USED TO PURCHASE THIS CERTIFICATE
IS AN "INSURANCE COMPANY GENERAL ACCOUNT."


<PAGE>


                        MORTGAGE PASS-THROUGH CERTIFICATE
                            SERIES 1999-16, CLASS B-6

     evidencing an interest in a pool of fixed interest rate, conventional,
         monthly pay, fully amortizing, first lien, one- to four-family
         residential mortgage loans, which may include loans secured by
           shares issued by cooperative housing corporations, sold by

                      NORWEST ASSET SECURITIES CORPORATION
                (Not an interest in or obligation of the Seller)

            THIS  CERTIFICATE DOES NOT EVIDENCE AN OBLIGATION OF, OR AN INTEREST
IN, THE SELLER, THE MASTER SERVICER, THE TRUSTEE OR ANY OF THEIR AFFILIATES, AND
IS NOT INSURED OR GUARANTEED BY THE SELLER, THE MASTER SERVICER,  THE TRUSTEE OR
ANY OF THEIR AFFILIATES, OR BY ANY GOVERNMENT AGENCY OR PRIVATE INSURER.

            DISTRIBUTIONS  IN  REDUCTION  OF  THE  PRINCIPAL   BALANCE  OF  THIS
CERTIFICATE  WILL BE MADE IN THE MANNER  DESCRIBED IN THE POOLING AND  SERVICING
AGREEMENT. ACCORDINGLY, THE OUTSTANDING PRINCIPAL BALANCE OF THIS CERTIFICATE AT
ANY TIME MAY BE LESS THAN THE INITIAL PRINCIPAL BALANCE REPRESENTED HEREBY.

Certificate No.                           Cut-Off Date: May 1, 1999

CUSIP No.:                                First Distribution Date: June 25, 1999

Percentage Interest evidenced             Denomination: $
by this Certificate: %

Final Scheduled Maturity Date:            June 25, 2029



<PAGE>



            THIS CERTIFIES THAT  ____________________________  is the registered
owner of the  Percentage  Interest  evidenced  by this  Certificate  in  monthly
distributions  to the Holders of the Class B-6  Certificates  with  respect to a
Trust Estate consisting of a pool of fixed interest rate, conventional,  monthly
pay, fully  amortizing,  first lien,  one- to four-family  residential  mortgage
loans,  other than the Fixed Retained Yield, if any, with respect  thereto,  and
which may  include  loans  secured  by  shares  issued  by  cooperative  housing
corporations   (the  "Mortgage   Loans")  formed  by  Norwest  Asset  Securities
Corporation  (hereinafter called the "Seller", which term includes any successor
entity  under the  Agreement  referred to below).  The Trust  Estate was created
pursuant  to a Pooling  and  Servicing  Agreement  dated as of May 28, 1999 (the
"Agreement") among the Seller, Norwest Bank Minnesota,  National Association, as
master  servicer  (the "Master  Servicer")  and First Union  National  Bank,  as
trustee (the  "Trustee"),  a summary of certain of the  pertinent  provisions of
which  is  set  forth  hereinafter.  To  the  extent  not  defined  herein,  the
capitalized  terms used herein have the  meanings  ascribed to such terms in the
Agreement.  This  Certificate  is issued  under  and is  subject  to the  terms,
provisions  and conditions of the  Agreement,  to which  Agreement the Holder of
this  Certificate by virtue of the  acceptance  hereof assents and by which such
Holder is bound.

            Pursuant to the terms of the Agreement,  a distribution will be made
on the 25th day of each  month or, if such 25th day is not a Business  Day,  the
Business Day immediately following (the "Distribution Date"),  commencing on the
first  Distribution  Date  specified  above,  to the  Person in whose  name this
Certificate  is  registered at the close of business on the last Business Day of
the month  preceding the month of such  distribution,  in an amount equal to the
product of the Percentage Interest evidenced by this Certificate and, subject to
the  prior  rights  of the  Class A  Certificates  and  each  Class  of  Class B
Certificates  bearing  a  lower  numerical   designation  as  specified  in  the
Agreement,  any Class B-6  Distribution  Amount  required to be  distributed  to
Holders of the Class B-6  Certificates  on such  Distribution  Date,  subject to
adjustment,  in certain events, as specified in the Agreement.  The pass-through
rate on the Class B-6 Certificates  applicable to each Distribution Date will be
6.500% per annum.  The amount of interest  which accrues on this  Certificate in
any month  will be  subject  to  reduction  with  respect  to any  Non-Supported
Interest Shortfall and the interest portion of certain Realized Losses allocated
to the Class B-6 Certificates, as described in the Agreement.

            Distributions  on this  Certificate  will be made on  behalf  of the
Trustee  either by the Master  Servicer or by a Paying  Agent  appointed  by the
Master Servicer by check mailed to the address of the Person  entitled  thereto,
as such name and address shall appear on the Certificate  Register,  unless such
Person is entitled to receive payments by wire transfer in immediately available
funds in accordance with the Pooling and Servicing Agreement and such Person has
notified the Master  Servicer  pursuant to the Pooling and  Servicing  Agreement
that such  payments  are to be made by wire  transfer of  immediately  available
funds.  Notwithstanding  the above,  the final  distribution in reduction of the
Principal  Balance  of this  Certificate  will be made  after due  notice of the
pendency of such  distribution and only upon  presentation and surrender of this
Certificate at the office or agency specified by the Trustee for that purpose in
the notice of final distribution.

            No  transfer  of a Class B-6  Certificate  will be made  unless such
transfer is exempt from the  registration  requirements of the Securities Act of
1933,  as  amended,  and  any  applicable  state  securities  laws or is made in
accordance  with said Act and laws. In the event that such a transfer is desired
to be made by the Holder hereof,  (i) the transferee will be required to execute
an  investment  letter in the form  described in the  Agreement and (ii) if such
transfer  is to be made  within  three  years  from the later of (a) the date of
initial issuance of the Certificates or (b) the last date on which the Seller or
any  affiliate  thereof  was  a  Holder  of  the  Certificates  proposed  to  be
transferred,  and unless  such  transfer is made in reliance on Rule 144A of the
Securities  Act of 1933,  as amended,  the Trustee or the Seller may require the
Holder to deliver an opinion of counsel  acceptable to and in form and substance
satisfactory  to the  Trustee  and the  Seller  that  such  transfer  is  exempt
(describing  the applicable  exemption and the basis  therefor) from or is being
made pursuant to the registration requirements of the Securities Act of 1933, as
amended,  and of any applicable statute of any state. The Holder hereof desiring
to effect such transfer shall,  and does hereby agree to, indemnify the Trustee,
the Seller,  the Master  Servicer,  and any Paying Agent acting on behalf of the
Trustee  against any liability  that may result if the transfer is not so exempt
or is not made in  accordance  with such Federal and state laws.  In  connection
with any such  transfer,  the Trustee  will also  require  (i) a  representation
letter,  in the form as described in the Agreement,  stating either (a) that the
transferee  is not a Plan and is not  acting  on  behalf  of a Plan or using the
assets of a Plan to effect such  purchase  or (b) subject to certain  conditions
described  in the  Agreement,  that the  source of funds used to  purchase  this
Certificate  is  an  "insurance  company  general  account,"  or  (ii)  if  such
transferee  is a Plan,  (a) an opinion of counsel  acceptable to and in form and
substance  satisfactory  to the Trustee  and the Seller with  respect to certain
matters and (b) such other  documentation  as the Seller or the Master  Servicer
may require, as described in the Agreement.

            Reference  is  hereby  made  to  the  further   provisions  of  this
Certificate set forth on the reverse hereof,  which further provisions shall for
all purposes have the same effect as if set forth at this place.

            This  Certificate  is issued on May 28, 1999, and based on its issue
price of 25.48750%, including accrued interest, and a stated redemption price at
maturity equal to its initial  principal balance (plus 3 days of interest at the
pass-through  rate hereon),  is issued with original issue discount  ("OID") for
federal income tax purposes.  Assuming that this  Certificate pays in accordance
with projected cash flows  reflecting the prepayment  assumption of 275% SPA (as
defined in the  Prospectus  Supplement  dated May 21,  1999 with  respect to the
offering of the Class A Certificates (except the Class A-PO Certificates), Class
B-1, Class B-2 and Class B-3 Certificates)  used to price this Certificate:  (i)
the  amount of OID as a  percentage  of the  initial  principal  balance of this
Certificate is approximately 74.56666667%;  (ii) the annual yield to maturity of
this Certificate,  compounded  monthly,  is approximately  33.20%; and (iii) the
amount of OID allocable to the short first accrual  period (May 28, 1999 to June
25, 1999) as a percentage of the initial  principal balance of this Certificate,
calculated using the exact method, is approximately 0.14632173%.

            This Certificate  constitutes a "regular interest" in a "real estate
mortgage  investment  conduit" as those terms are defined in Section  860G(a)(1)
and  Section  860D,  respectively,  of the  Internal  Revenue  Code of 1986,  as
amended.

            Unless this  Certificate  has been  countersigned  by an  authorized
officer of the  Trustee,  by manual  signature,  this  Certificate  shall not be
entitled to any benefit under the Agreement or be valid for any purpose.


<PAGE>



            IN WITNESS  WHEREOF,  the Trustee has caused this  Certificate to be
duly executed as of the date set forth below.

Dated:

                                                First Union National Bank,
                                                   Trustee


                                                By
                                                  ------------------------------
                                                  Authorized Officer

Countersigned:

First Union National Bank,
   Trustee


By
  ------------------------------
  Authorized Officer


<PAGE>


                                    EXHIBIT C
                [Form of Reverse of Series 1999-16 Certificates]

                      NORWEST ASSET SECURITIES CORPORATION
                       MORTGAGE PASS-THROUGH CERTIFICATES
                                 SERIES 1999-16

            This  Certificate is one of a duly authorized  issue of Certificates
issued in several Classes  designated as Mortgage  Pass-Through  Certificates of
the Series specified hereon (herein collectively called the "Certificates").

            The  Certificates  are  limited  in  right  of  payment  to  certain
collections  and  recoveries   respecting  the  Mortgage  Loans,   all  as  more
specifically  set forth  herein  and in the  Agreement.  In the event  funds are
advanced with respect to any Mortgage Loan by a Servicer, the Master Servicer or
the  Trustee,  such  advances  are  reimbursable  to such  Servicer,  the Master
Servicer or the Trustee to the extent  provided in the  Agreement,  from related
recoveries  on such  Mortgage  Loan or from  other  cash  that  would  have been
distributable to Certificateholders.

            As  provided  in the  Agreement,  withdrawals  from the  Certificate
Account created for the benefit of Certificateholders  may be made by the Master
Servicer  from  time  to  time  for  purposes   other  than   distributions   to
Certificateholders,  such purposes  including  reimbursement to a Servicer,  the
Master  Servicer  or the  Trustee,  as  applicable,  of  advances  made  by such
Servicer, the Master Servicer or the Trustee.

            The Agreement permits, with certain exceptions therein provided, the
amendment of the Agreement and the modification of the rights and obligations of
the  Seller,  the  Master  Servicer,  and  the  Trustee  and the  rights  of the
Certificateholders  under the  Agreement  at any time by the Seller,  the Master
Servicer  and the  Trustee  with the  consent  of the  Holders  of  Certificates
evidencing  in the  aggregate  not less than 66 2/3% of the Voting  Interests of
each Class of Certificates  affected thereby.  Any such consent by the Holder of
this  Certificate  shall be  conclusive  and binding on such Holder and upon all
future  holders  of this  Certificate  and of any  Certificate  issued  upon the
transfer  hereof or in exchange hereof or in lieu hereof whether or not notation
of such consent is made upon the  Certificate.  The  Agreement  also permits the
amendment thereof in certain circumstances without the consent of the Holders of
any of the Certificates.

            As provided  in the  Agreement  and  subject to certain  limitations
therein  set forth,  the  transfer of this  Certificate  is  registrable  in the
Certificate  Register upon surrender of this  Certificate  for  registration  of
transfer at the office or agency appointed by the Trustee,  duly endorsed by, or
accompanied  by an assignment  in the form below or other written  instrument of
transfer in form satisfactory to the Trustee and the Certificate Registrar, duly
executed by the Holder  hereof or such  Holder's  attorney  duly  authorized  in
writing, and thereupon one or more new Certificates of authorized  Denominations
evidencing  the same Class and aggregate  Percentage  Interest will be issued to
the designated transferee or transferees.

            The  Certificates  are  issuable  only  as  registered  Certificates
without  coupons in Classes and  Denominations  specified in the  Agreement.  As
provided in the Agreement and subject to certain  limitations therein set forth,
Certificates are  exchangeable for new Certificates of authorized  Denominations
evidencing the same Class and aggregate Percentage Interest, as requested by the
Holder surrendering the same.

            No service charge will be made for any such registration of transfer
or exchange, but the Trustee or the Certificate Registrar may require payment of
a sum  sufficient  to cover  any tax or other  governmental  charge  payable  in
connection therewith.

            The Seller,  the Master  Servicer,  the Trustee and the  Certificate
Registrar,  and any agent of the Seller, the Master Servicer, the Trustee or the
Certificate  Registrar,  may treat the Person in whose name this  Certificate is
registered  as the owner hereof for all  purposes,  and neither the Seller,  the
Master Servicer, the Trustee, the Certificate Registrar nor any such agent shall
be affected by notice to the contrary.

            The  obligations   created  by  the  Agreement  in  respect  of  the
Certificates  and the Trust Estate created thereby shall terminate upon the last
action  required  to be taken by the  Trustee  on the  Final  Distribution  Date
pursuant  to the  Agreement  following  the  earlier of (i) the payment or other
liquidation (or advance with respect  thereto) of the last Mortgage Loan subject
thereto or the disposition of all property  acquired upon foreclosure or deed in
lieu of  foreclosure  of any Mortgage  Loan, and (ii) the purchase by the Seller
from the Trust Estate of all remaining  Mortgage Loans and all property acquired
in respect of such Mortgage Loans; provided, however, that the Trust Estate will
in no event  continue  beyond the  expiration  of 21 years from the death of the
last survivor of the  descendants of Joseph P. Kennedy,  the late  ambassador of
the  United  States  to the  Court  of St.  James,  living  on the  date  of the
Agreement.  The Agreement permits,  but does not require, the Seller to purchase
all  remaining  Mortgage  Loans and all  property  acquired  in  respect  of any
Mortgage Loan at a price  determined as provided in the Agreement.  The exercise
of such option will effect early  retirement of the  Certificates,  the Seller's
right to exercise  such option  being  subject to the Pool  Scheduled  Principal
Balance  of the  Mortgage  Loans as of the  Distribution  Date  upon  which  the
proceeds of such repurchase are  distributed  being less than ten percent of the
Cut-Off Date Aggregate Principal Balance.


<PAGE>



                                   ASSIGNMENT

FOR VALUE RECEIVED,  the undersigned  hereby sell(s),  assign(s) and transfer(s)
unto


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


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


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


      (Please print or typewrite name and address including postal zip code
                                  of assignee)

the  beneficial   interest   evidenced  by  the  within  Mortgage   Pass-Through
Certificate and hereby  authorizes the transfer of registration of such interest
to assignee on the Certificate Register of the Trust Estate.

            I (We)  further  direct  the  Certificate  Registrar  to issue a new
Certificate  of a like  Denomination  or Percentage  Interest and Class,  to the
above named assignee and deliver such Certificate to the following address:


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


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

Social Security or other Identifying Number of Assignee:


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


Dated:


                                           -------------------------------------
                                           Signature by or on behalf of assignor


                                           -------------------------------------
                                                   Signature Guaranteed


<PAGE>


                            DISTRIBUTION INSTRUCTIONS

            The  assignee   should   include  the   following  for  purposes  of
distribution:

            Distributions  shall be made, if the assignee is eligible to receive
distributions in immediately available funds, by wire transfer or otherwise,  in
immediately                  available                  funds                 to
_________________________________________________________________     for    the
account  of   _______________________________________________   account   number
_____________,        or,       if        mailed       by       check,        to
_______________________________________________________.  Applicable  statements
should be mailed to _______________________________________________________.


            This information is provided by ______________________, the assignee
named above, or ___________________________________, as its agent.


<PAGE>


                                    EXHIBIT D

                                    RESERVED


<PAGE>

                                    EXHIBIT E

                               CUSTODIAL AGREEMENT

            THIS CUSTODIAL  AGREEMENT (as amended and supplemented  from time to
time,  the  "Agreement"),  dated as of  _____________,  by and among FIRST UNION
NATIONAL BANK, not individually, but solely as Trustee (including its successors
under the Pooling and Servicing Agreement defined below, the "Trustee"), NORWEST
ASSET  SECURITIES  CORPORATION  (together  with any  successor in interest,  the
"Seller"),  NORWEST BANK  MINNESOTA,  NATIONAL  ASSOCIATION  (together  with any
successor in interest or  successor  under the Pooling and  Servicing  Agreement
referred  to  below,  the  "Master  Servicer")  and  ___________________________
(together with any successor in interest or any successor  appointed  hereunder,
the "Custodian").

                           W I T N E S S E T H  T H A T
                           - - - - - - - - - -  - - - -

            WHEREAS,  the Seller,  the Master  Servicer,  and the Trustee,  have
entered into a Pooling and Servicing Agreement dated as of May 28, 1999 relating
to the issuance of Mortgage  Pass-Through  Certificates,  Series  1999-16 (as in
effect  on the date of this  Agreement,  the  "Original  Pooling  and  Servicing
Agreement",  and as amended and supplemented from time to time, the "Pooling and
Servicing Agreement"); and

            WHEREAS,  the  Custodian  has agreed to act as agent for the Trustee
for  the  purposes  of  receiving  and  holding  certain   documents  and  other
instruments  delivered by the Seller under the Pooling and Servicing  Agreement,
all upon the terms and conditions and subject to the limitations hereinafter set
forth;

            NOW,  THEREFORE,  in  consideration  of the  premises and the mutual
covenants and agreements  hereinafter set forth,  the Trustee,  the Seller,  the
Master Servicer and the Custodian hereby agree as follows:

                                    ARTICLE I

                                   DEFINITIONS

            Capitalized  terms used in this  Agreement  and not  defined  herein
shall  have  the  meanings  assigned  in  the  Original  Pooling  and  Servicing
Agreement, unless otherwise required by the context herein.

                                   ARTICLE II

                          CUSTODY OF MORTGAGE DOCUMENTS

            Section  2.01  Custodian  to Act as Agent;  Acceptance  of Custodial
Files.  The  Custodian,  as the duly  appointed  agent of the  Trustee for these
purposes,  acknowledges  receipt  of the  Mortgage  Notes,  the  Mortgages,  the
assignments and other documents relating to the Mortgage Loans identified on the
schedule  attached hereto and declares that it holds and will hold such Mortgage
Notes,  Mortgages,  assignments  and other  documents and any similar  documents
received by the Trustee subsequent to the date hereof (the "Custodial Files") as
agent for the  Trustee,  in trust,  for the use and  benefit of all  present and
future Certificateholders.

            Section 2.02  Recordation  of  Assignments.  If any  Custodial  File
includes one or more  assignments  to the Trustee of Mortgage  Notes and related
Mortgages that have not been recorded,  each such assignment  shall be delivered
by  the  Custodian  to  the  Seller  for  the  purpose  of  recording  it in the
appropriate  public  office for real  property  records,  and the Seller,  at no
expense to the Custodian, shall promptly cause to be recorded in the appropriate
public office for real property  records each such  assignment and, upon receipt
thereof  from such  public  office,  shall  return each such  assignment  to the
Custodian.

            Section 2.03 Review of Custodial  Files. The Custodian  agrees,  for
the benefit of Certificateholders,  to review, in accordance with the provisions
of Section 2.01 of the Pooling and Servicing Agreement,  each Custodial File. If
in performing  the review  required by this Section 2.3 the Custodian  finds any
document or documents  constituting  a part of a Custodial File to be missing or
defective in any material  respect,  the Custodian  shall promptly so notify the
Seller, the Master Servicer and the Trustee.

            Section  2.04  Notification  of  Breaches  of  Representations   and
Warranties. Upon discovery by the Custodian of a breach of any representation or
warranty  made by the Seller or the Master  Servicer as set forth in the Pooling
and Servicing  Agreement,  the Custodian shall give prompt written notice to the
Seller, the Master Servicer and the Trustee.

            Section 2.05  Custodian to  Cooperate;  Release of Custodial  Files.
Upon the  payment in full of any  Mortgage  Loan,  or the  receipt by the Master
Servicer  of a  notification  that  payment in full will be escrowed in a manner
customary for such purposes,  the Master Servicer shall  immediately  notify the
Custodian by a certification  (which  certification shall include a statement to
the effect that all amounts  received or to be received in connection  with such
payment which are required to be deposited in the Certificate  Account  pursuant
to Section 3.02 of the Pooling and Servicing  Agreement  have been or will be so
deposited)  of a  Servicing  Officer  and shall  request  delivery  to it of the
Custodial File. The Custodian  agrees,  upon receipt of such  certification  and
request, promptly to release the related Custodial File to the Master Servicer.

            From time to time as is appropriate for the servicing or foreclosure
of any Mortgage  Loan,  the Master  Servicer  shall  deliver to the  Custodian a
certificate of a Servicing  Officer  requesting  that  possession of all, or any
document  constituting  part of, the  Custodial  File be  released to the Master
Servicer and  certifying as to the reason for such release and that such release
will not invalidate any insurance  coverage  provided in respect of the Mortgage
Loan. With such certificate,  the Master Servicer shall deliver to the Custodian
a receipt signed by a Servicing  Officer on behalf of the Master  Servicer,  and
upon receipt of the foregoing, the Custodian shall deliver the Custodial File or
such  document  to the Master  Servicer.  The Master  Servicer  shall cause each
Custodial  File or any  document  therein  so  released  to be  returned  to the
Custodian when the need therefor by the Master Servicer no longer exists, unless
(i) the Mortgage Loan has been liquidated and the Liquidation  Proceeds relating
to the  Mortgage  Loan have been  deposited  in the  Certificate  Account to the
extent  required by the Pooling and  Servicing  Agreement or (ii) the  Custodial
File or such document has been delivered to an attorney,  or to a public trustee
or other  public  official as required by law,  for  purposes of  initiating  or
pursuing legal action or other  proceedings for the foreclosure of the Mortgaged
Property  either  judicially  or  non-judicially,  and the Master  Servicer  has
delivered to the Custodian a certificate of a Servicing Officer certifying as to
the name and address of the Person to which such Custodial File or such document
were delivered and the purpose or purposes of such delivery. In the event of the
liquidation of a Mortgage  Loan,  the Custodian  shall deliver such receipt with
respect thereto to the Master  Servicer upon deposit of the related  Liquidation
Proceeds in the  Certificate  Account to the extent  required by the Pooling and
Servicing Agreement.

            Section 2.06 Assumption Agreements. In the event that any assumption
agreement or substitution of liability agreement is entered into with respect to
any Mortgage  Loan subject to this  Agreement in  accordance  with the terms and
provisions of the Pooling and Servicing  Agreement,  the Master  Servicer  shall
notify the Custodian  that such  assumption or  substitution  agreement has been
completed by  forwarding  to the  Custodian  the original of such  assumption or
substitution agreement,  which copy shall be added to the related Custodial File
and, for all purposes,  shall be considered a part of such Custodial File to the
same extent as all other documents and instruments constituting parts thereof.

                                   ARTICLE III

                            CONCERNING THE CUSTODIAN

            Section  3.01  Custodian  a Bailee  and Agent of the  Trustee.  With
respect to each Mortgage Note,  Mortgage and other documents  constituting  each
Custodian  File  which  are  delivered  to  the  Custodian,   the  Custodian  is
exclusively  the bailee and agent of the Trustee,  holds such  documents for the
benefit of  Certificateholders  and  undertakes  to perform such duties and only
such  duties  as are  specifically  set  forth in this  Agreement.  Except  upon
compliance  with the  provisions of Section 2.5 of this  Agreement,  no Mortgage
Note,  Mortgage or other document  constituting a part of a Custodial File shall
be delivered by the Custodian to the Seller or the Master  Servicer or otherwise
released from the possession of the Custodian.

            Section 3.02 Indemnification.  The Seller hereby agrees to indemnify
and hold the  Custodian  harmless  from and  against  all  claims,  liabilities,
losses,  actions,  suits  or  proceedings  at law  or in  equity,  or any  other
expenses,  fees or charges of any  character or nature,  which the Custodian may
incur or with which the  Custodian may be threatened by reasons of its acting as
custodian  under this  Agreement,  including  indemnification  of the  Custodian
against  any and all  expenses,  including  attorney's  fees if counsel  for the
Custodian has been approved by the Seller, and the cost of defending any action,
suit or proceedings or resisting any claim. Notwithstanding the foregoing, it is
specifically  understood and agreed that in the event any such claim, liability,
loss,  action,  suit or proceeding or other expense,  fees, or charge shall have
been caused by reason of any negligent act, negligent failure to act, or willful
misconduct  on the part of the  Custodian,  or which shall  constitute a willful
breach of its duties hereunder, the indemnification provisions of this Agreement
shall not apply.

            Section 3.03  Custodian May Own  Certificates.  The Custodian in its
individual or any other capacity may become the owner or pledgee of Certificates
with the same rights it would have if it were not Custodian.

            Section 3.04 Master Servicer to Pay  Custodian's  Fees and Expenses.
The Master  Servicer  covenants and agrees to pay to the Custodian  from time to
time, and the Custodian shall be entitled to,  reasonable  compensation  for all
services rendered by it in the exercise and performance of any of the powers and
duties hereunder of the Custodian, and the Master Servicer will pay or reimburse
the Custodian upon its request for all reasonable  expenses,  disbursements  and
advances  incurred  or made  by the  Custodian  in  accordance  with  any of the
provisions of this  Agreement  (including the  reasonable  compensation  and the
expenses and  disbursements  of its counsel and of all persons not  regularly in
its employ), except any such expense,  disbursement or advance as may arise from
its negligence or bad faith.

            Section 3.05 Custodian May Resign; Trustee May Remove Custodian. The
Custodian may resign from the  obligations  and duties hereby imposed upon it as
such  obligations  and duties  relate to its acting as Custodian of the Mortgage
Loans. Upon receiving such notice of resignation,  the Trustee shall either take
custody of the  Custodial  Files  itself and give prompt  notice  thereof to the
Seller,  the Master  Servicer and the Custodian or promptly  appoint a successor
Custodian by written  instrument,  in  duplicate,  one copy of which  instrument
shall be  delivered to the  resigning  Custodian  and one copy to the  successor
Custodian.  If the Trustee shall not have taken  custody of the Custodial  Files
and no  successor  Custodian  shall  have been so  appointed  and have  accepted
resignation,  the  resigning  Custodian  may  petition  any  court of  competent
jurisdiction for the appointment of a successor Custodian.

            The Trustee may remove the Custodian at any time. In such event, the
Trustee shall appoint, or petition a court of competent jurisdiction to appoint,
a successor Custodian  hereunder.  Any successor Custodian shall be a depository
institution  subject to supervision or examination by federal or state authority
and shall be able to satisfy the other requirements contained in Section 3.7.

            Any  resignation  or removal of the Custodian and  appointment  of a
successor  Custodian pursuant to any of the provisions of this Section 3.5 shall
become effective upon acceptance of appointment by the successor Custodian.  The
Trustee  shall give prompt  notice to the Seller and the Master  Servicer of the
appointment of any successor  Custodian.  No successor Custodian shall have been
appointed and accepted  appointment by the Trustee without the prior approval of
the Seller and the Master Servicer.

            Section 3.06 Merger or Consolidation  of Custodian.  Any Person into
which  the  Custodian  may be  merged  or  converted  or  with  which  it may be
consolidated,   or  any  Person   resulting  from  any  merger,   conversion  or
consolidation to which the Custodian shall be a party, or any Person  succeeding
to the  business  of the  Custodian,  shall be the  successor  of the  Custodian
hereunder,  without the  execution  or filing of any paper or any further act on
the  part  of  any  of the  parties  hereto,  anything  herein  to the  contrary
notwithstanding.

            Section 3.07 Representations of the Custodian.  The Custodian hereby
represents  that  it is a  depository  institution  subject  to  supervision  or
examination by a federal or state authority,  has a combined capital and surplus
of at least  $10,000,000 and is qualified to do business in the  jurisdiction in
which it will hold any Custodian File.

                                   ARTICLE IV

                            MISCELLANEOUS PROVISIONS

            Section 4.01 Notices.  All notices,  requests,  consents and demands
and other communications  required under this Agreement or pursuant to any other
instrument  or document  delivered  hereunder  shall be in writing  and,  unless
otherwise  specifically  provided,  may be delivered personally,  by telegram or
telex,  or by registered or certified  mail,  postage  prepaid,  return  receipt
requested,  at the  addresses  specified on the  signature  page hereof  (unless
changed by the particular party whose address is stated herein by similar notice
in writing), in which case the notice will be deemed delivered when received.

            Section  4.02  Amendments.   No  modification  or  amendment  of  or
supplement to this Agreement  shall be valid or effective  unless the same is in
writing and signed by all  parties  hereto,  and neither the Seller,  the Master
Servicer  nor the  Trustee  shall  enter  into any  amendment  hereof  except as
permitted by the Pooling and Servicing Agreement.  The Trustee shall give prompt
notice to the  Custodian  of any  amendment  or  supplement  to the  Pooling and
Servicing Agreement and furnish the Custodian with written copies thereof.

            Section  4.03  Governing  Law.  This  Agreement  shall  be  deemed a
contract made under the laws of the State of New York and shall be construed and
enforced in accordance with and governed by the laws of the State of New York.

            Section 4.04  Recordation of Agreement.  To the extent  permitted by
applicable  law, this  Agreement is subject to  recordation  in all  appropriate
public offices for real property records in all the counties or other comparable
jurisdictions in which any or all of the properties subject to the Mortgages are
situated,  and in any other  appropriate  public  recording office or elsewhere,
such  recordation  to be effected by the Master  Servicer  and at its expense on
direction by the Trustee,  but only upon direction  accompanied by an Opinion of
Counsel to the effect that such recordation  materially and beneficially affects
the interests of the Certificateholders.

            For the purpose of facilitating the recordation of this Agreement as
herein  provided  and  for  other  purposes,  this  Agreement  may  be  executed
simultaneously in any number of counterparts,  each of which  counterparts shall
be deemed to be an original,  and such counterparts shall constitute but one and
the same instrument.

            Section 4.05  Severability of Provisions.  If any one or more of the
covenants,  agreements,  provisions or terms of this Agreement  shall be for any
reason whatsoever held invalid, then such covenants,  agreements,  provisions or
terms  shall be  deemed  severable  from the  remaining  covenants,  agreements,
provisions or terms of this Agreement and shall in no way affect the validity or
enforceability  of the other provisions of this Agreement or of the Certificates
or the rights of the holders thereof.


<PAGE>


            IN WITNESS WHEREOF,  this Agreement is executed as of the date first
above written.

Address:                            FIRST UNION NATIONAL BANK


230 South Tryon Street              By:
Charlotte, North Carolina, 28288          --------------------------------------
                                    Name:
                                          --------------------------------------
                                    Title:
                                          --------------------------------------

Address:                            NORWEST ASSET SECURITIES CORPORATION


7485 New Horizon Way                By:
Frederick, Maryland 21703                 --------------------------------------
                                    Name:
                                          --------------------------------------
                                    Title:
                                          --------------------------------------

Address:                            NORWEST BANK MINNESOTA, NATIONAL ASSOCIATION


7485 New Horizon Way                By:
Frederick, Maryland 21703                 --------------------------------------
                                    Name:
                                          --------------------------------------
                                    Title:
                                          --------------------------------------

Address:                            [CUSTODIAN]


                                    By:
                                          --------------------------------------
                                    Name:
                                          --------------------------------------
                                    Title:
                                          --------------------------------------

<PAGE>


STATE OF      )
              )   ss.:
COUNTY OF     )

            On this ____ day of _________,  19__,  before me, a notary public in
and for the State of ____________, personally appeared _______________, known to
me  who,  being  by me duly  sworn,  did  depose  and say  that  he  resides  at
__________________________;   that  he  is  the   __________  of  Norwest  Asset
Securities Corporation a Delaware corporation,  one of the parties that executed
the  foregoing  instrument;  and that he signed his name thereto by order of the
Board of Directors of said corporation.


                                                  -------------------------
                                                         Notary Public

[NOTARIAL SEAL]


<PAGE>



STATE OF      )
              )   ss.:
COUNTY OF     )

            On this ____ day of _________,  19__,  before me, a notary public in
and for the State of ____________, personally appeared _______________, known to
me  who,  being  by me duly  sworn,  did  depose  and say  that  he  resides  at
__________________________; that he is the __________ of Norwest Bank Minnesota,
National  Association,  a national banking association,  one of the parties that
executed the foregoing instrument;  and that he signed his name thereto by order
of the Board of Directors of said corporation.


                                                  -------------------------
                                                         Notary Public

[NOTARIAL SEAL]


<PAGE>



STATE OF      )
              )   ss.:
COUNTY OF     )

            On this ___ day of ________, 19__, before me, a notary public in and
for the State of ____________,  personally appeared __________ _________,  known
to me who,  being  by me duly  sworn,  did  depose  and say that he  resides  at
__________________________;  that he is the  ____________________ of First Union
National Bank, a national banking association,  one of the parties that executed
the  foregoing  instrument;  and that he signed his name thereto by order of the
Board of Directors of said association.


                                                  -------------------------
                                                         Notary Public

[NOTARIAL SEAL]


<PAGE>



STATE OF      )
              )   ss.:
COUNTY OF     )

            On this ____ day of ________,  19__,  before me, a notary  public in
and for the State of  __________,  personally  appeared  __________  __________,
known to me who,  being by me duly sworn,  did depose and say that he resides at
__________________________;   that   he  is   the   _______________________   of
______________________,  a  _________________________,  one of the parties  that
executed the foregoing instrument;  and that he signed his name thereto by order
of the Board of Directors of said association.


                                                  -------------------------
                                                         Notary Public

[NOTARIAL SEAL]


<PAGE>

                                   EXHIBIT F-1

            [Schedule of Mortgage Loans Serviced by Norwest Mortgage
                 from locations other than Frederick, Maryland]

NASCOR
NMI / 1999-16  Exhibit F-1
30 YEAR FIXED RATE NON RELOCATION LOANS


<TABLE>
<CAPTION>
(i)       (ii)                                       (iii)     (iv)      (v)       (vi)       (vii)     (viii)     (ix)
- --------  ---------------------------  -----  -----  --------  --------  --------  ---------  --------  ---------  ------------
                                                                         NET                                       CUT-OFF
MORTGAGE                                                       MORTGAGE  MORTGAGE  CURRENT    ORIGINAL  SCHEDULED  DATE
LOAN                                          ZIP    PROPERTY  INTEREST  INTEREST  MONTHLY    TERM TO   MATURITY   PRINCIPAL
NUMBER    CITY                         STATE  CODE   TYPE      RATE      RATE      PAYMENT    MATURITY  DATE       BALANCE
- --------  ---------------------------  -----  -----  --------  --------  --------  ---------  --------  ---------  ------------
<S>       <C>                          <C>    <C>    <C>       <C>       <C>       <C>        <C>       <C>        <C>
7521517   MINNEAPOLIS                  MN     55410  SFD          7.125     6.500  $1,958.97      360   1-Jan-29    $288,822.68

                                                                                                                    $288,822.68



<CAPTION>
(i)       (x)      (xi)       (xii)       (xiii)    (xiv)        (xv)         (xvi)
- --------  ------   ---------  ----------  --------  -----------  -----------  -----------

MORTGAGE                      MORTGAGE              T.O.P.       MASTER       FIXED
LOAN                          INSURANCE   SERVICE   MORTGAGE     SERVICE      RETAINED
NUMBER    LTV      SUBSIDY    CODE        FEE       LOAN         FEE          YIELD
- --------  ------   ---------  ----------  --------  -----------  -----------  -----------
<S>       <C>      <C>        <C>         <C>       <C>          <C>          <C>
7521517    79.66                            0.250                 0.017         0.358

</TABLE>



COUNT:                 1
WAC:               7.125
WAM:                 356
WALTV:             79.66

<PAGE>

                                   EXHIBIT F-2

           [Schedule of Mortgage Loans Serviced by Norwest Mortgage in
                              Frederick, Maryland]

NASCOR
NMI / 1999-16  Exhibit F-2
30 YEAR FIXED RATE NON RELOCATION  LOANS

<TABLE>
<CAPTION>
(i)       (ii)                                     (iii)     (iv)      (v)       (vi)        (vii)     (viii)      (ix)
- --------  -------------------------  -----  -----  --------  --------  --------  ----------  --------  ----------  ---------------
                                                                       NET                                         CUT-OFF
MORTGAGE                                                     MORTGAGE  MORTGAGE  CURRENT     ORIGINAL  SCHEDULED   DATE
LOAN                                        ZIP    PROPERTY  INTEREST  INTEREST  MONTHLY     TERM TO   MATURITY    PRINCIPAL
NUMBER    CITY                       STATE  CODE   TYPE      RATE      RATE      PAYMENT     MATURITY  DATE        BALANCE
- --------  -------------------------  -----  -----  --------  --------  --------  ----------  --------  ----------  ---------------
<S>       <C>                        <C>    <C>    <C>       <C>       <C>       <C>         <C>       <C>         <C>
4699654   BRANCHBURG                 NJ     08876  SFD          7.375     6.500  $ 2,038.88      360   1-May-29    $    295,200.00
4716112   MIDDLEBURG                 FL     32068  SFD          7.375     6.500  $ 2,431.18      360   1-Mar-29    $    351,462.67
4765675   RHINEBECK                  NY     12572  SFD          7.750     6.500  $ 2,507.45      360   1-Mar-29    $    349,504.34
4818663   MARLBORO                   NJ     07746  SFD          6.500     6.233  $ 1,738.19      360   1-Apr-29    $    274,751.39
4826828   WOODBURY                   MN     55125  SFD          7.125     6.500  $ 1,757.74      360   1-May-29    $    260,900.00
4826909   BELLE MEAD                 NJ     08502  SFD          6.750     6.483  $ 1,707.12      360   1-May-29    $    263,200.00
4830823   VALLEY CENTER              KS     67147  SFD          7.375     6.500  $ 2,051.31      360   1-Apr-29    $    296,774.00
4839938   CLIVE                      IA     50325  SFD          7.250     6.500  $ 1,767.52      360   1-Apr-29    $    258,897.88
4862615   PHILADELPHIA               PA     19119  SFD          7.250     6.500  $ 2,046.53      360   1-Apr-29    $    299,765.97
4865850   ATLANTIC BEACH             NY     11509  SFD          7.250     6.500  $ 1,773.66      360   1-Jun-28    $    257,700.27
4879708   QUOGUE                     NY     11959  SFD          7.625     6.500  $ 2,548.06      360   1-May-29    $    360,000.00
4883014   INDIANAPOLIS               IN     46278  SFD          7.375     6.500  $ 1,740.51      360   1-Dec-28    $    251,029.33
4889278   CARLSBAD                   CA     92009  LCO          7.000     6.500  $   399.18      360   1-Oct-28    $     59,649.64
4891309   CINCINNATI                 OH     45255  SFD          7.250     6.500  $ 2,414.90      360   1-Dec-28    $    352,602.43
4902152   CASTRO VALLEY              CA     94552  SFD          7.125     6.500  $ 2,863.31      360   1-May-29    $    425,000.00
4911891   ELIOT                      ME     03903  SFD          7.250     6.500  $ 2,721.21      360   1-Oct-28    $    396,681.80
4914886   TARZANA                    CA     91356  SFD          7.000     6.500  $ 2,128.97      360   1-May-29    $    320,000.00
4926758   BOLTON                     MA     01740  SFD          7.375     6.500  $ 2,156.98      360   1-Feb-29    $    311,582.69
4930049   CUPERTINO                  CA     95014  SFD          7.000     6.500  $ 3,193.46      360   1-May-29    $    480,000.00
4931751   SUGARLOAF KEY              FL     33042  SFD          7.750     6.500  $ 2,091.93      360   1-Apr-29    $    291,793.90
4941578   NEW YORK                   NY     10023  COP          7.250     6.500  $ 1,705.45      360   1-May-29    $    250,000.00
4945298   GLENDALE                   CA     91202  SFD          6.875     6.500  $ 1,970.79      360   1-Jan-29    $    298,983.14
4946637   FRANKLIN                   NJ     08873  SFD          7.625     6.500  $ 2,364.03      360   1-Mar-29    $    333,514.99
4947865   GLEN HEAD                  NY     11545  SFD          7.500     6.500  $ 2,220.01      360   1-May-29    $    317,500.00
4951209   EVERGREEN                  CO     80439  SFD          7.000     6.500  $ 2,001.23      360   1-Mar-29    $    300,305.44
4951252   BELLMORE                   NY     11710  SFD          7.250     6.500  $ 1,991.96      360   1-Mar-29    $    290,321.28
4951614   SAN JOSE                   CA     95138  LCO          7.250     6.500  $ 1,717.38      360   1-May-29    $    251,750.00
4952543   SAN MATEO                  CA     94403  SFD          7.000     6.500  $ 2,509.53      360   1-May-29    $    377,200.00
4954882   MONROE                     NY     10950  SFD          7.250     6.500  $ 1,732.73      360   1-Apr-29    $    253,801.85
4956347   CASTLE ROCK                CO     80104  SFD          7.125     6.500  $ 4,379.17      360   1-Feb-29    $    648,431.34
4956630   UPPER SADDLE RIVER         NJ     07458  SFD          7.125     6.500  $ 2,358.01      360   1-Apr-29    $    349,720.12
4958805   BRENTOOD                   TN     37027  SFD          6.875     6.500  $ 1,886.04      360   1-Feb-29    $    286,372.26
4958960   HINSDALE                   IL     60521  SFD          7.125     6.500  $ 2,436.17      360   1-Jan-29    $    360,432.98
4959853   GARDEN CITY                NY     11530  SFD          7.375     6.500  $ 5,180.07      360   1-Apr-29    $    749,429.30
4960261   ARMONK                     NY     10504  SFD          6.750     6.483  $ 2,529.53      360   1-May-29    $    390,000.00
4961404   HUNTINGTON                 NY     11743  SFD          7.125     6.500  $ 1,788.73      360   1-May-29    $    265,500.00
4962294   BRIGHTON                   MI     48116  SFD          7.375     6.500  $ 2,417.37      360   1-Apr-29    $    349,733.68
4962753   TAMPA                      FL     33647  SFD          6.500     6.233  $ 1,643.38      360   1-Mar-29    $    259,528.63
4962772   NEW YORK                   NY     10003  COP          6.750     6.483  $ 2,048.93      360   1-May-29    $    315,900.00
4962920   SAN JOSE                   CA     95120  SFD          7.375     6.500  $ 2,414.61      360   1-Mar-29    $    349,055.50
4964716   STOW                       MA     01775  SFD          6.875     6.500  $ 2,243.42      360   1-Dec-28    $    340,048.92
4965057   MONKTON                    MD     21111  SFD          7.375     6.500  $ 1,961.52      360   1-Apr-29    $    283,783.90
4965176   EDINA                      MN     55424  SFD          6.750     6.483  $ 2,545.75      360   1-May-29    $    392,500.00
4966864   HOUSTON                    TX     77056  PUD          7.000     6.500  $ 1,786.34      360   1-May-29    $    268,500.00
4969754   CARLISLE                   MA     01740  SFD          6.750     6.483  $ 3,209.92      360   1-May-29    $    494,900.00
4969995   MILL CREEK                 WA     98012  SFD          7.375     6.500  $ 1,795.76      360   1-May-29    $    260,000.00
4971043   MUTTONTOWN                 NY     11791  SFD          6.875     6.500  $ 3,941.58      360   1-Apr-29    $    599,495.92
4971379   LLOYD NECK                 NY     11743  SFD          6.500     6.233  $ 2,578.84      360   1-Apr-29    $    407,631.16
4971757   NEEDHAM                    MA     02492  SFD          7.250     6.500  $ 1,964.67      360   1-May-29    $    288,000.00
4972111   WESTBURY                   NY     11590  SFD          6.875     6.500  $ 1,644.30      360   1-May-29    $    250,300.00
4972456   FULLERTON                  CA     92831  SFD          7.000     6.500  $ 2,381.79      360   1-Jan-29    $    356,781.18
4972460   EDGEWATER                  MD     21037  SFD          7.125     6.500  $ 1,943.68      360   1-Feb-29    $    287,803.75
4972571   ORANGE                     CA     92867  SFD          7.125     6.500  $ 1,926.83      360   1-Feb-29    $    285,309.81
4973297   MOUNTAIN VIEW              CA     94040  SFD          7.250     6.500  $ 2,558.17      360   1-May-29    $    375,000.00
4973570   TEANECK                    NJ     07666  SFD          7.375     6.500  $ 1,899.36      360   1-Apr-29    $    274,790.74
4973794   NEW YORK                   NY     10023  HCO          7.125     6.500  $ 1,951.09      360   1-May-29    $    289,600.00
4974162   CRESTWOOD                  NY     10707  SFD          7.000     6.500  $ 1,783.02      360   1-Apr-29    $    267,780.31
4974292   GARDEN CITY                NY     11530  SFD          7.000     6.500  $ 2,588.03      360   1-Nov-28    $    382,797.38
4974421   INDIANOLA                  WA     98342  SFD          6.875     6.500  $ 2,069.33      360   1-May-29    $    315,000.00
4974446   VALLEY STREAM              NY     11581  SFD          6.875     6.500  $ 1,642.33      360   1-Apr-29    $    249,789.96
4975081   PALO ALTO                  CA     94303  SFD          7.000     6.500  $ 2,661.21      360   1-May-29    $    400,000.00
4975752   KATONAH                    NY     10536  SFD          7.125     6.500  $ 1,953.79      360   1-Mar-29    $    289,534.80
4976212   BEDFORD                    NH     03110  SFD          6.625     6.358  $ 2,132.24      360   1-May-29    $    333,000.00
4976217   WEST ROXBURY               MA     02132  SFD          7.125     6.500  $ 1,805.57      360   1-Apr-29    $    267,785.68
4976264   BEDFORD CORNERS            NY     10549  SFD          7.250     6.500  $ 2,012.42      360   1-Apr-29    $    294,769.88
4976354   SAN CARLOS                 CA     94070  SFD          7.000     6.500  $ 2,684.50      360   1-May-29    $    403,500.00
4978528   ENGLEWOOD CLIFFS           NJ     07632  SFD          7.250     6.500  $ 2,728.71      360   1-Apr-29    $    399,687.96
4978826   SCOTTSDALE                 AZ     85254  SFD          7.000     6.500  $ 1,871.17      360   1-Apr-29    $    281,019.46
4979176   CUPERTINO                  CA     95014  SFD          7.750     6.500  $ 2,421.48      360   1-May-29    $    338,000.00
4980418   SEA GIRT                   NJ     08750  SFD          6.375     6.108  $ 2,720.07      360   1-Apr-29    $    435,596.18
4980589   VIRGINIA BEACH             VA     23452  SFD          7.375     6.500  $ 1,709.42      360   1-May-29    $    247,500.00
4981144   PARK CITY                  UT     84060  SFD          7.625     6.500  $ 2,017.21      360   1-May-29    $    285,000.00
4982108   SUFFERN                    NY     10901  SFD          7.125     6.500  $ 2,128.95      360   1-May-29    $    316,000.00
4982310   LOOMIS                     CA     95650  SFD          7.250     6.500  $ 2,229.35      360   1-May-29    $    326,800.00
4982519   HAWTHORNE                  CA     90250  SFD          7.500     6.500  $ 1,964.80      360   1-Apr-29    $    280,791.45
4982626   PALO ALTO                  CA     94306  SFD          7.000     6.500  $ 2,195.50      360   1-May-29    $    330,000.00
4982663   REDWOOD CITY               CA     94062  SFD          7.125     6.500  $ 2,518.36      360   1-May-29    $    373,800.00
4982667   PHOENIXVILLE               PA     19460  SFD          6.750     6.483  $ 1,819.32      360   1-May-29    $    280,500.00
4982730   LOS ANGELES                CA     90025  LCO          7.125     6.500  $ 1,937.62      360   1-May-29    $    287,600.00
4982800   STAMFORD                   CT     06902  SFD          6.625     6.358  $ 1,728.84      360   1-May-29    $    270,000.00
4982814   PHOENIX                    AZ     85023  SFD          6.875     6.500  $ 1,806.56      360   1-Apr-29    $    274,768.97
4982950   SIMSBURY                   CT     06070  SFD          6.500     6.233  $ 2,370.26      360   1-May-29    $    375,000.00
4982958   NEW YORK                   NY     10017  HCO          7.375     6.500  $ 2,659.10      360   1-May-29    $    385,000.00
4983192   EVERETT                    WA     98203  SFD          6.625     6.358  $ 2,036.19      360   1-Feb-29    $    316,860.44
4983347   GERMANTOWN                 TN     38138  SFD          7.125     6.500  $ 2,829.61      360   1-Apr-29    $    419,664.14
4983855   AVALON                     NJ     08202  SFD          6.625     6.358  $ 3,022.27      360   1-Mar-29    $    471,164.83
4983877   CLINTON                    NC     28328  SFD          7.250     6.500  $ 1,782.19      360   1-May-29    $    261,250.00
4984058   MORGAN HILL                CA     95037  SFD          7.375     6.500  $ 1,712.88      360   1-May-29    $    248,000.00
4984215   RENO                       NV     89511  SFD          6.375     6.108  $ 1,653.26      360   1-Apr-29    $    264,754.55
4984343   POTOMAC                    MD     20854  SFD          6.875     6.500  $ 6,569.29      360   1-May-29    $  1,000,000.00
4984599   HUNTINGTON BEACH           CA     92649  SFD          7.125     6.500  $ 2,459.08      360   1-May-29    $    365,000.00
4984627   LOS GATOS                  CA     95030  SFD          7.125     6.500  $ 6,737.19      360   1-May-29    $  1,000,000.00
4985052   WASHINGTON                 TX     77833  SFD          7.250     6.500  $ 1,719.09      360   1-May-29    $    252,000.00
4985145   GILROY                     CA     95020  SFD          7.000     6.500  $ 1,623.34      360   1-May-29    $    244,000.00
4985333   WESTFORD                   MA     01886  SFD          6.625     6.358  $ 2,627.84      360   1-May-29    $    410,400.00
4985471   MERCER ISLAND              WA     98040  SFD          7.500     6.500  $ 2,097.64      360   1-Apr-29    $    299,777.36
4985557   COTO DE CAZA               CA     92679  SFD          7.125     6.500  $ 1,748.30      360   1-May-29    $    259,500.00
4985916   NORTHRIDGE                 CA     91326  SFD          7.500     6.500  $ 2,307.41      360   1-May-29    $    330,000.00
4986007   OCEAN CITY                 NJ     08226  LCO          7.500     6.500  $ 3,356.23      360   1-Apr-29    $    479,643.77
4986463   SUNNYVALE                  CA     94087  SFD          7.125     6.500  $ 3,368.60      360   1-May-29    $    500,000.00
4986606   DEARBORN HEIGHTS           MI     48127  LCO          7.375     6.500  $ 1,954.61      360   1-May-29    $    283,000.00
4986827   OAKDALE                    CA     95361  SFD          6.875     6.500  $ 1,655.47      360   1-May-29    $    252,000.00
4986877   RICHWOOD                   KY     41094  SFD          6.750     6.483  $ 4,215.89      360   1-Apr-29    $    649,440.36
4986937   NEW YORK                   NY     10019  HCO          7.000     6.500  $ 3,326.45      360   1-May-29    $    499,990.00
4987050   OVERLAND PARK              KS     66213  SFD          7.000     6.500  $ 1,886.80      360   1-May-29    $    283,600.00
4987192   FOSTER CITY                CA     94404  SFD          7.125     6.500  $ 2,297.39      360   1-May-29    $    341,000.00
4987199   HARRISON                   NY     10528  SFD          6.750     6.483  $ 3,567.29      360   1-May-29    $    550,000.00
4987429   WESTLAKE VILLAGE           CA     91361  SFD          7.625     6.500  $ 1,985.37      360   1-Apr-29    $    280,296.97
4987569   RYE                        NY     10580  SFD          7.000     6.500  $ 2,661.21      360   1-May-29    $    400,000.00
4987659   LAKE FORREST               CA     92630  SFD          7.875     6.500  $ 2,590.67      360   1-Apr-29    $    357,054.11
4987692   GAITHERSBURG               MD     20882  SFD          7.375     6.500  $ 1,761.23      360   1-Apr-29    $    254,805.96
4987969   AUSTIN                     TX     78731  SFD          7.000     6.500  $ 1,765.05      360   1-Apr-29    $    264,572.97
4988033   FLEMINGTON                 NJ     08822  SFD          7.000     6.500  $ 1,833.58      360   1-May-29    $    275,600.00
4988050   PENSACOLA                  FL     32501  SFD          6.875     6.500  $ 3,126.99      360   1-May-29    $    476,000.00
4988120   DIX HILLS                  NY     11746  SFD          6.250     5.983  $ 2,586.02      360   1-May-29    $    420,000.00
4988347   COLLEYVILLE                TX     76034  SFD          6.875     6.500  $ 1,865.68      360   1-Apr-29    $    283,761.40
4988396   LAWTON                     OK     73507  SFD          7.000     6.500  $ 1,862.85      360   1-Apr-29    $    279,770.49
4988461   CUPERTINO                  CA     95014  PUD          7.250     6.500  $ 2,414.91      360   1-May-29    $    354,000.00
4988503   DANVILLE                   CA     94526  SFD          7.000     6.500  $ 3,353.13      360   1-May-29    $    504,000.00
4988618   SAN RAFAEL                 CA     94903  LCO          7.000     6.500  $ 2,102.36      360   1-May-29    $    316,000.00
4988778   WEST ISLIP                 NY     11795  SFD          7.375     6.500  $ 2,016.77      360   1-Apr-29    $    291,777.82
4989023   WAYNE                      NJ     07470  SFD          7.250     6.500  $ 2,148.86      360   1-May-29    $    315,000.00
4989283   NEW ROCHELLE               NY     10804  SFD          7.250     6.500  $ 2,728.71      360   1-May-29    $    400,000.00
4989682   MCLEAN                     VA     22101  SFD          6.500     6.233  $ 2,420.83      360   1-May-29    $    383,000.00
4989920   REDDING                    CT     06896  SFD          7.000     6.500  $ 2,315.26      360   1-May-29    $    348,000.00
4990006   RYE BROOK                  NY     10573  SFD          7.375     6.500  $ 2,707.45      360   1-May-29    $    392,000.00
4990766   CUPERTINO                  CA     95014  SFD          6.750     6.483  $ 1,816.08      360   1-May-29    $    280,000.00
4991129   LOS ANGELES                CA     90036  SFD          7.500     6.500  $ 3,487.34      360   1-May-29    $    498,750.00
4991164   DIX HILLS                  NY     11746  SFD          6.750     6.483  $ 1,945.80      360   1-May-29    $    300,000.00
4991221   PORTLAND                   OR     97217  SFD          7.375     6.500  $ 2,175.63      360   1-Apr-29    $    314,760.31
4991227   WHITE PLANES               NY     10605  SFD          7.500     6.500  $ 1,957.80      360   1-May-29    $    280,000.00
4991309   MANHASSET                  NY     11030  SFD          7.000     6.500  $ 2,328.56      360   1-May-29    $    350,000.00
4991606   HOLMDEL                    NJ     07733  SFD          7.500     6.500  $ 2,104.64      360   1-May-29    $    301,000.00
4991631   MONTICELLO                 IN     47960  SFD          7.250     6.500  $ 3,750.95      360   1-Apr-29    $    549,421.07
4991787   CHEVY CHASE                MD     20815  SFD          7.125     6.500  $ 2,738.67      360   1-May-29    $    406,500.00
4991930   WINTER PARK                FL     32789  SFD          7.750     6.500  $ 2,022.17      349   1-May-28    $    279,786.17
4992096   DURHAM                     CA     95938  SFD          7.125     6.500  $ 2,263.70      360   1-Apr-29    $    335,731.30
4992302   FREMONT                    CA     94539  SFD          7.875     6.500  $ 2,900.28      360   1-May-29    $    400,000.00
4993397   TULSA                      OK     74120  SFD          7.500     6.500  $ 1,946.26      360   1-Apr-29    $    278,143.43
4993400   TULSA                      OK     74137  SFD          7.250     6.500  $ 2,046.53      360   1-Apr-29    $    299,765.97
4993872   SAN JOSE                   CA     95120  SFD          7.000     6.500  $ 1,955.99      360   1-May-29    $    294,000.00
4994122   OAK PARK                   CA     91301  SFD          7.375     6.500  $ 1,765.37      360   1-May-29    $    255,600.00
4994152   ISSAQUAH                   WA     98029  SFD          7.250     6.500  $ 2,049.60      360   1-May-29    $    300,450.00
4994159   NEW YORK                   NY     10025  HCO          7.375     6.500  $ 2,900.84      360   1-May-29    $    420,000.00
4994602   ATLANTA                    GA     30308  SFD          7.000     6.500  $ 2,494.89      360   1-May-29    $    375,000.00
4994717   LONG GROVE                 IL     60047  SFD          7.250     6.500  $ 3,069.80      360   1-May-29    $    450,000.00
4994740   EDINA                      MN     55424  SFD          7.250     6.500  $ 3,165.30      360   1-May-29    $    464,000.00
4994842   WOODINVILLE                WA     98072  SFD          7.125     6.500  $ 2,142.43      360   1-Apr-29    $    317,745.70
4995194   BRONXVILLE                 NY     10708  SFD          6.875     6.500  $ 1,655.47      360   1-May-29    $    252,000.00
4995617   CHESTERFIELD               MO     63017  SFD          7.125     6.500  $ 2,253.26      360   1-May-29    $    334,450.00
4995735   YORBA LINDA                CA     92886  SFD          7.125     6.500  $ 2,021.16      360   1-May-29    $    300,000.00
4995800   LOS ALTOS                  CA     94022  SFD          6.875     6.500  $ 4,270.04      360   1-May-29    $    650,000.00
4995989   FORT WORTH                 TX     76107  SFD          7.250     6.500  $ 6,293.08      360   1-May-29    $    922,500.00
4996274   ROCKVILLE                  MD     20853  SFD          6.500     6.233  $ 2,114.27      360   1-Nov-28    $    332,179.40
4996320   EAST HAMPTON               NY     11937  SFD          7.375     6.500  $ 1,830.29      360   1-Feb-29    $    264,391.35
4996418   HOUSTON                    TX     77005  SFD          6.875     6.500  $ 2,067.35      360   1-Jan-29    $    313,633.36
4996516   LAKE OSWEGO                OR     97034  SFD          7.000     6.500  $ 1,783.02      360   1-Apr-29    $    267,780.31
4996776   DANVILLE                   IN     46122  SFD          7.250     6.500  $ 2,387.62      360   1-Apr-29    $    349,726.96
4996786   TULSA                      OK     74137  SFD          7.500     6.500  $ 1,879.49      360   1-Apr-28    $    266,107.11
4996842   SUMNER                     WA     98390  SFD          7.000     6.500  $ 3,186.80      360   1-Jan-29    $    477,415.68
4996895   ARLINGTON                  TX     76013  SFD          7.000     6.500  $ 1,796.32      360   1-Jan-29    $    269,106.95
4996914   LONGMONT                   CO     80503  SFD          7.125     6.500  $ 2,112.11      360   1-Jan-29    $    312,488.22
4996942   SAN JOSE                   CA     95123  SFD          7.125     6.500  $ 1,996.91      360   1-May-29    $    296,400.00
4996976   NORTH GRANBY               CT     06060  SFD          7.250     6.500  $ 2,120.24      360   1-May-29    $    310,804.00
4997019   ESSEX                      MA     01929  SFD          7.750     6.500  $ 2,039.31      351   1-Jun-28    $    282,372.84
4997057   OAKLAND                    CA     94605  SFD          7.250     6.500  $ 2,184.33      360   1-May-29    $    320,200.00
4997111   LOS ANGELES                CA     90006  SFD          7.250     6.500  $ 1,800.95      360   1-Apr-29    $    263,794.05
4997162   BOTHELL                    WA     98011  SFD          6.875     6.500  $ 1,872.25      360   1-Jan-29    $    283,543.73
4997225   HAMPTON                    VA     23669  SFD          6.875     6.500  $ 1,771.09      360   1-May-29    $    269,600.00
4997867   REDONDO BEACH              CA     90277  SFD          7.375     6.500  $ 2,512.68      360   1-May-29    $    363,800.00
4997973   SAN DIEGO                  CA     92109  SFD          7.250     6.500  $ 2,236.86      360   1-May-29    $    327,900.00
4998052   FAIRFAX                    CA     94930  SFD          7.250     6.500  $ 2,200.02      360   1-May-29    $    322,500.00
4998168   DILLON BEACH               CA     94929  SFD          7.375     6.500  $ 1,785.40      360   1-May-29    $    258,500.00
4998309   DALLAS                     TX     75225  SFD          7.250     6.500  $ 2,387.62      360   1-Apr-29    $    349,726.96
4998468   ENCINO                     CA     91316  SFD          7.625     6.500  $ 3,362.03      360   1-May-29    $    475,000.00
4998493   LEXINGTON                  MA     02173  SFD          6.750     6.483  $ 2,734.49      360   1-May-29    $    421,600.00
4998604   JACKSON                    MS     39211  SFD          7.000     6.500  $ 1,896.11      360   1-Apr-29    $    284,766.39
4998632   BRISBANE                   CA     94005  LCO          7.250     6.500  $ 2,612.74      360   1-May-29    $    383,000.00
4998749   FREMONT                    CA     94536  SFD          7.375     6.500  $ 1,856.54      360   1-May-29    $    268,800.00
4998953   NEW CANAAN                 CT     06840  SFD          6.750     6.483  $ 3,891.59      360   1-May-29    $    600,000.00
4999331   SAN DIEGO                  CA     92123  LCO          7.250     6.500  $ 2,203.43      360   1-Apr-29    $    322,748.03
4999464   EAST HAMPTON               NY     11937  SFD          7.500     6.500  $ 1,778.81      360   1-May-29    $    254,400.00
5000142   CHISAGO CITY               MN     55013  SFD          6.500     6.233  $ 1,769.79      360   1-Jan-29    $    278,979.25
5000435   CINCINNATI                 OH     45244  SFD          6.500     6.233  $ 2,174.32      360   1-Mar-29    $    343,376.35
5000449   SANTA CLARA                CA     95050  SFD          7.625     6.500  $ 1,911.05      360   1-May-29    $    270,000.00
5000457   BEDMINSTER                 NJ     07921  SFD          7.500     6.500  $ 1,783.00      360   1-May-29    $    255,000.00
5000494   VALENCIA                   CA     91354  SFD          7.250     6.500  $ 2,019.25      360   1-May-29    $    296,000.00
5000582   NAPERVILLE                 IL     60564  SFD          6.625     6.358  $ 1,824.89      360   1-Mar-29    $    284,495.71
5000717   BIRMINGHAM                 AL     35242  SFD          7.500     6.500  $ 4,544.20      360   1-May-29    $    649,900.00
5001015   TEQUESTA                   FL     33469  SFD          7.000     6.500  $ 2,714.44      360   1-May-29    $    408,000.00
5001025   BIRMINGHAM                 AL     35216  SFD          7.375     6.500  $ 3,011.35      360   1-May-29    $    436,000.00
5001093   RANCHO PALOS VERDES        CA     90275  SFD          6.875     6.500  $ 2,837.94      360   1-May-29    $    432,000.00
5001140   TACOMA                     WA     98446  SFD          7.375     6.500  $ 1,799.21      360   1-Mar-29    $    259,900.32
5001147   BIRMINGHAM TOWNSHIP        PA     19382  SFD          7.375     6.500  $ 2,811.05      360   1-Mar-29    $    405,180.25
5001166   SAN JOSE                   CA     95131  SFD          7.375     6.500  $ 2,728.17      360   1-May-29    $    395,000.00
5001242   BERKELEY                   CA     94705  SFD          7.375     6.500  $ 2,538.24      360   1-May-29    $    367,500.00
5001274   SAN FRANCISCO              CA     94117  SFD          7.375     6.500  $ 3,204.74      360   1-May-29    $    464,000.00
5001430   HUBBARD                    OH     44425  SFD          7.375     6.500  $ 2,926.05      360   1-May-29    $    423,650.00
5001505   FORT WORTH                 TX     76107  SFD          7.125     6.500  $ 4,379.17      360   1-May-29    $    650,000.00
5001510   SAN DIEGO                  CA     92109  LCO          7.000     6.500  $ 3,033.78      360   1-May-29    $    456,000.00
5001566   MOUNTAIN VIEW              CA     94041  SFD          7.250     6.500  $ 2,421.73      360   1-May-29    $    355,000.00
5001587   AURORA                     CO     80015  SFD          7.000     6.500  $ 1,861.18      360   1-Apr-29    $    279,520.69
5001711   CENTREVILLE                DE     19807  SFD          6.750     6.483  $ 1,816.07      360   1-Mar-29    $    279,516.50
5001717   CINCINNATI                 OH     45246  SFD          7.000     6.500  $ 1,862.85      360   1-Feb-29    $    279,307.43
5001861   WINCHESTER                 MA     01890  SFD          7.750     6.500  $ 2,149.24      360   1-May-29    $    300,000.00
5001980   CARLSBAD                   CA     92009  SFD          7.000     6.500  $ 1,939.02      360   1-Mar-29    $    290,970.82
5002018   DALLAS                     TX     75230  SFD          7.000     6.500  $ 2,687.83      360   1-Apr-29    $    403,668.84
5002020   HANOVER                    MA     02339  SFD          7.000     6.500  $ 3,579.33      360   1-Apr-29    $    537,559.00
5002084   LAGUNA NIGUEL              CA     92677  SFD          7.000     6.500  $ 1,862.85      360   1-May-29    $    280,000.00
5002202   GREENWICH                  CT     06831  SFD          7.375     6.500  $ 2,141.48      300   1-May-24    $    293,000.00
5002451   TETON VILLAGE              WY     83025  SFD          7.125     6.500  $ 3,702.09      360   1-May-29    $    549,500.00
5002539   TOWER                      MN     55790  SFD          6.500     6.233  $ 2,621.82      360   1-Mar-29    $    414,048.00
5002545   SAINT CHARLES              IL     60175  SFD          7.000     6.500  $ 2,222.12      360   1-May-29    $    334,000.00
5002665   GLEN MILLS                 PA     19342  SFD          6.625     6.358  $ 1,760.86      360   1-May-29    $    275,000.00
5002710   SONOMA                     CA     95476  SFD          7.500     6.500  $ 2,090.66      360   1-May-29    $    299,000.00
5002740   JUPITER                    FL     33458  SFD          7.375     6.500  $ 2,237.79      360   1-May-29    $    324,000.00
5002760   SAN JOSE                   CA     95135  SFD          7.750     6.500  $ 2,808.34      360   1-May-29    $    392,000.00
5002788   NEW YORK                   NY     10013  HCO          7.250     6.500  $ 2,987.93      360   1-Apr-29    $    437,658.32
5002807   SEATTLE                    WA     98105  SFD          7.000     6.500  $ 2,123.65      360   1-May-29    $    319,200.00
5002899   SONOMA                     CA     95476  SFD          7.125     6.500  $ 2,188.24      360   1-May-29    $    324,800.00
5003147   MANHATTAN BEACH            CA     90266  SFD          6.875     6.500  $ 2,627.72      360   1-May-29    $    400,000.00
5003156   OAK PARK                   CA     91301  SFD          7.375     6.500  $ 1,916.63      360   1-May-29    $    277,500.00
5003198   THOUSAND OAKS              CA     91362  SFD          7.250     6.500  $ 1,910.10      360   1-May-29    $    280,000.00
5003392   TUXEDO PARK                NY     10987  SFD          7.500     6.500  $ 2,461.24      360   1-May-29    $    352,000.00
5003601   SUNNYVALE                  CA     94087  SFD          7.250     6.500  $ 2,237.54      360   1-May-29    $    328,000.00
5003806   WESTON                     CT     06883  SFD          7.250     6.500  $ 2,046.53      360   1-May-29    $    300,000.00
5003918   DALLAS                     TX     75230  SFD          6.750     6.483  $ 3,567.29      360   1-May-29    $    550,000.00
5004035   AUSTIN                     TX     78730  SFD          6.750     6.483  $ 2,429.00      360   1-May-29    $    374,500.00
5004042   LAREDO                     TX     78041  SFD          7.250     6.500  $ 1,841.88      360   1-Mar-29    $    269,577.47
5004138   PARKLAND                   FL     33067  SFD          7.125     6.500  $ 2,021.16      360   1-May-29    $    300,000.00
5004185   TIBURON                    CA     94920  SFD          7.250     6.500  $ 5,542.69      360   1-May-29    $    812,500.00
5004197   LAFAYETTE                  CA     94549  SFD          7.250     6.500  $ 3,342.67      360   1-May-29    $    490,000.00
5004270   STAMFORD                   CT     06903  SFD          6.625     6.358  $ 2,061.81      360   1-May-29    $    322,000.00
5004350   COLUMBIA                   MO     65203  SFD          7.375     6.500  $ 2,357.27      360   1-Apr-29    $    341,040.31
5004363   NOVATO                     CA     94945  SFD          7.625     6.500  $ 3,666.38      360   1-May-29    $    518,000.00
5004370   MENLO PARK                 CA     94025  SFD          7.125     6.500  $ 2,627.50      360   1-May-29    $    390,000.00
5004401   SAN DIEGO                  CA     92131  SFD          7.125     6.500  $ 1,810.29      360   1-May-29    $    268,700.00
5004423   SEATTLE                    WA     98105  SFD          7.000     6.500  $ 2,787.62      360   1-May-29    $    419,000.00
5004427   SUNNYVALE                  CA     94087  SFD          7.750     6.500  $ 2,185.06      360   1-May-29    $    305,000.00
5004529   PALO ALTO                  CA     94306  SFD          7.500     6.500  $ 2,293.43      360   1-May-29    $    328,000.00
5004549   CHERRY HILLS VILLAGE       CO     80110  SFD          6.875     6.500  $ 3,659.10      360   1-May-29    $    557,000.00
5004604   REDMOND                    WA     98053  SFD          7.250     6.500  $ 2,114.75      360   1-Apr-29    $    309,758.17
5004812   SANTA CLARA                CA     95051  SFD          7.750     6.500  $ 2,084.76      360   1-May-29    $    291,000.00
5004854   AUDUBON                    PA     19403  SFD          7.000     6.500  $ 2,297.69      360   1-May-29    $    345,360.00
5004870   SANTA FE                   NM     87505  SFD          7.000     6.500  $ 1,646.63      360   1-May-29    $    247,500.00
5004896   LYNBROOK                   NY     11563  SFD          7.875     6.500  $   906.34      360   1-May-29    $    125,000.00
5004909   SUNNYVALE                  CA     94087  SFD          7.875     6.500  $ 1,979.44      360   1-May-29    $    273,000.00
5005062   YORBA LINDA                CA     92886  SFD          7.125     6.500  $ 4,257.91      360   1-May-29    $    632,000.00
5005171   LOS ALAMITOS               CA     90720  SFD          7.375     6.500  $ 1,747.41      360   1-May-29    $    253,000.00
5005238   BETHESDA                   MD     20817  SFD          6.750     6.483  $ 1,660.42      360   1-Jan-29    $    255,110.86
5005289   SAN FRANCISCO              CA     94132  SFD          7.375     6.500  $ 2,590.03      360   1-May-29    $    375,000.00
5005305   NOVATO                     CA     94949  SFD          7.500     6.500  $ 2,129.11      360   1-May-29    $    304,500.00
5005362   WEBSTER GROVES             MO     63119  SFD          7.125     6.500  $ 1,953.79      360   1-May-29    $    290,000.00
5005369   NOVATO                     CA     94945  SFD          7.375     6.500  $ 1,906.27      360   1-May-29    $    276,000.00
5005370   SAN FRANCISCO              CA     94111  LCO          7.250     6.500  $ 2,246.28      360   1-May-29    $    329,280.00
5005383   SANTA BARBARA              CA     93111  SFD          7.750     6.500  $ 2,163.57      360   1-May-29    $    302,000.00
5005405   GREEN OAKS                 IL     60048  SFD          7.625     6.500  $ 2,484.36      360   1-Apr-29    $    350,720.54
5005439   NORTH REDINGTON BEAC       FL     33708  SFD          7.375     6.500  $ 1,806.12      360   1-May-29    $    261,500.00
5005444   SAN JOSE                   CA     95129  SFD          7.875     6.500  $ 2,102.71      360   1-May-29    $    290,000.00
5005452   MILPITAS                   CA     95035  SFD          7.875     6.500  $ 2,813.27      360   1-May-29    $    388,000.00
5005460   SAN JOSE                   CA     95129  SFD          7.625     6.500  $ 2,123.39      360   1-May-29    $    300,000.00
5005478   SAN JOSE                   CA     95120  SFD          7.375     6.500  $ 2,405.88      240   1-May-19    $    301,500.00
5005842   WILTON                     CT     06897  SFD          7.500     6.500  $ 3,845.68      360   1-May-29    $    550,000.00
5005904   CHINO HILLS                CA     91709  SFD          7.125     6.500  $ 1,751.67      360   1-Apr-29    $    259,792.08
5006095   CAPE CORAL                 FL     33914  SFD          7.125     6.500  $ 2,182.85      360   1-May-29    $    324,000.00
5006096   MILFORD                    MI     48380  SFD          7.500     6.500  $ 2,258.47      360   1-Dec-28    $    321,689.49
5006345   HERMOSA BEACH              CA     90254  SFD          7.250     6.500  $ 3,656.47      360   1-May-29    $    536,000.00
5006517   ST. GEORGE                 UT     84790  SFD          7.250     6.500  $ 2,630.47      360   1-May-29    $    385,600.00
5006522   SAN FRANCISCO              CA     94108  HCO          7.375     6.500  $ 2,817.96      360   1-May-29    $    408,000.00
5006829   SAN DIEGO                  CA     92131  SFD          7.000     6.500  $ 2,461.62      360   1-May-29    $    370,000.00
5007001   AUSTIN                     TX     78731  SFD          6.875     6.500  $ 2,470.06      360   1-May-29    $    376,000.00
5007188   SUNNYVALE                  CA     94087  SFD          6.500     6.233  $ 1,896.21      360   1-May-29    $    300,000.00
5007319   ANAHEIM                    CA     92807  SFD          7.375     6.500  $ 1,989.15      360   1-May-29    $    288,000.00
5007358   SANDY                      UT     84092  SFD          6.875     6.500  $ 2,627.72      360   1-Apr-29    $    399,663.95
5007396   SAN JOSE                   CA     95135  SFD          7.250     6.500  $ 3,465.46      360   1-May-29    $    508,000.00
5007397   WESTPORT                   CT     06880  SFD          7.000     6.500  $ 2,508.20      360   1-May-29    $    377,000.00
5007404   ALAMEDA                    CA     94501  SFD          7.125     6.500  $ 1,994.21      360   1-May-29    $    296,000.00
5007473   FREMONT                    CA     94539  SFD          7.750     6.500  $ 3,159.38      360   1-May-29    $    441,000.00
5007533   NASHVILLE                  TN     37220  SFD          7.000     6.500  $ 1,975.94      360   1-May-29    $    297,000.00
5007553   SAN FRANCISCO              CA     94108  HCO          7.250     6.500  $ 2,165.37      360   1-May-29    $    317,420.00
5007599   SANTA CLARA                CA     95051  SFD          7.125     6.500  $ 1,819.05      360   1-May-29    $    270,000.00
5007601   MISSION VIEJO              CA     92692  SFD          7.000     6.500  $ 2,162.24      360   1-May-29    $    325,000.00
5007928   DANVILLE                   CA     94506  SFD          7.875     6.500  $ 3,624.77      360   1-May-29    $    499,920.00
5008016   SAN JOSE                   CA     95128  SFD          7.375     6.500  $ 1,806.81      360   1-May-29    $    261,600.00
5008017   LAFITTE                    LA     70067  SFD          7.250     6.500  $ 1,862.35      360   1-Mar-29    $    272,572.77
5008167   NORTH MIAMI BEACH          FL     33160  SFD          7.375     6.500  $ 3,038.98      360   1-May-29    $    440,000.00
5008197   CUPERTINO                  CA     95014  SFD          7.125     6.500  $ 2,004.31      360   1-Apr-29    $    297,262.10
5008278   FREMONT                    CA     94539  SFD          7.500     6.500  $ 1,908.86      360   1-May-29    $    273,000.00
5008335   CUPERTINO                  CA     95014  SFD          7.875     6.500  $ 1,957.69      360   1-May-29    $    270,000.00
5008416   SAN CARLOS                 CA     94070  SFD          7.000     6.500  $ 2,428.36      360   1-May-29    $    365,000.00
5008472   LAS FLORES                 CA     92688  SFD          7.250     6.500  $ 1,825.84      360   1-May-29    $    267,650.00
5008514   AGOURA HILLS               CA     91301  SFD          7.250     6.500  $ 1,725.91      360   1-May-29    $    253,000.00
5008546   LAS VEGAS                  NV     89113  SFD          7.250     6.500  $ 1,705.44      360   1-May-29    $    250,000.00
5008548   REDWOOD CITY               CA     94061  SFD          7.250     6.500  $ 2,251.18      360   1-Apr-29    $    329,742.57
5008638   SAN DIEGO                  CA     92116  SFD          7.250     6.500  $ 1,715.67      360   1-Apr-29    $    251,303.81
5008645   LAGUNA BEACH               CA     92651  SFD          7.375     6.500  $ 1,788.51      360   1-May-29    $    258,950.00
5009028   MILPITAS                   CA     95035  SFD          7.500     6.500  $ 2,223.51      360   1-May-29    $    318,000.00
5009157   CAMARILLO                  CA     93012  SFD          7.250     6.500  $ 1,875.98      360   1-Apr-29    $    274,785.48
5009160   SAN JOSE                   CA     95135  SFD          7.125     6.500  $ 2,661.19      360   1-May-29    $    395,000.00
5009178   PLACERVILLE                CA     95667  SFD          7.250     6.500  $ 2,077.23      360   1-Apr-29    $    304,262.46
5009208   LA CANADA FLINTRIDGE       CA     91011  SFD          7.250     6.500  $ 3,540.50      360   1-May-29    $    519,000.00
5009312   NORTHRIDGE                 CA     91326  SFD          7.250     6.500  $ 1,903.27      360   1-Apr-29    $    278,782.36
5009916   SOUTHAMPTON                NY     11968  SFD          7.625     6.500  $ 1,677.48      360   1-May-29    $    237,000.00
5010023   SAN JOSE                   CA     95131  SFD          7.000     6.500  $ 2,498.22      360   1-May-29    $    375,500.00
5010030   PLEASANTON                 CA     94588  SFD          7.750     6.500  $ 2,185.78      360   1-May-29    $    305,100.00
5010060   LAFAYETTE                  CA     94549  SFD          7.000     6.500  $ 2,927.34      360   1-May-29    $    440,000.00
5010070   ALAMEDA                    CA     94501  SFD          7.250     6.500  $ 1,705.45      360   1-May-29    $    250,000.00
5010187   SUNNYVALE                  CA     94087  SFD          7.250     6.500  $ 2,114.75      360   1-May-29    $    310,000.00
5010247   CUPERTINO                  CA     95014  SFD          7.750     6.500  $ 2,342.67      360   1-May-29    $    327,000.00
5010270   TORRANCE                   CA     90505  SFD          7.500     6.500  $ 1,966.20      360   1-May-29    $    281,200.00
5010340   CHINO HILLS                CA     91709  SFD          7.500     6.500  $ 2,255.67      240   1-May-19    $    280,000.00
5010397   ANNAPOLIS                  MD     21401  SFD          6.750     6.483  $ 1,913.36      360   1-Apr-29    $    294,746.02
5010420   AUSTIN                     TX     78703  SFD          6.875     6.500  $ 3,186.10      360   1-Apr-29    $    484,592.55
5010447   AURORA                     CO     80016  SFD          6.875     6.500  $ 3,186.10      360   1-Apr-29    $    484,592.55
5010472   LAGUNA BEACH               CA     92651  SFD          7.000     6.500  $ 1,829.59      360   1-May-29    $    275,000.00
5010562   WESTPORT                   CT     06880  SFD          7.125     6.500  $ 2,021.16      360   1-May-29    $    300,000.00
5010670   COTTAGE GROVE              OR     97424  SFD          7.125     6.500  $ 2,122.21      360   1-May-29    $    315,000.00
5010860   CAMPBELL                   CA     95008  SFD          7.625     6.500  $ 2,575.38      360   1-May-29    $    363,860.00
5010910   ROSS                       CA     94957  SFD          7.250     6.500  $ 3,683.76      360   1-Apr-29    $    539,578.74
5010999   MISSION VIEJO              CA     92692  SFD          7.375     6.500  $ 2,503.70      360   1-May-29    $    362,500.00
5011046   FREMONT                    CA     94539  SFD          7.125     6.500  $ 3,368.60      360   1-May-29    $    500,000.00
5011247   GLENDALE                   CA     91202  SFD          7.375     6.500  $ 3,515.54      360   1-Apr-29    $    508,612.69
5011261   SAN JOSE                   CA     95120  SFD          7.125     6.500  $ 2,223.28      360   1-Apr-29    $    329,736.10
5011508   LOS GATOS                  CA     95032  SFD          7.125     6.500  $ 1,903.25      360   1-Apr-29    $    282,274.09
5011678   SAN MATEO                  CA     94404  LCO          7.250     6.500  $ 2,128.39      360   1-May-29    $    312,000.00
5011739   MARIETTA                   GA     30067  SFD          7.750     6.500  $ 2,261.72      360   1-May-29    $    315,700.00
5012088   LAGUNA NIGUEL              CA     92677  SFD          7.000     6.500  $ 1,697.86      360   1-May-29    $    255,200.00
5012221   LAGUNA NIGUEL              CA     92677  SFD          7.375     6.500  $ 2,282.69      360   1-May-29    $    330,500.00
5012327   FREMONT                    CA     94539  SFD          7.375     6.500  $ 3,453.38      360   1-May-29    $    500,000.00
5012337   SAN JOSE                   CA     95132  SFD          7.375     6.500  $ 2,763.05      360   1-May-29    $    400,050.00
5012481   POTOMAC                    MD     20854  SFD          7.000     6.500  $ 2,548.11      360   1-May-29    $    383,000.00
5012614   COLORADO SPRINGS           CO     80906  SFD          7.000     6.500  $ 1,696.52      360   1-May-29    $    255,000.00
5012691   IRVINE                     CA     92714  SFD          7.000     6.500  $ 1,683.22      360   1-May-29    $    253,000.00
5012933   UNIVERSITY CITY            MO     63130  SFD          7.125     6.500  $ 1,852.73      360   1-May-29    $    275,000.00
5012980   DANVILLE                   CA     94526  SFD          7.625     6.500  $ 2,576.37      360   1-May-29    $    364,000.00
5012995   ORINDA                     CA     94563  SFD          7.875     6.500  $ 3,451.34      360   1-May-29    $    476,000.00
5013096   FREMONT                    CA     94539  SFD          7.750     6.500  $ 2,349.84      360   1-May-29    $    328,000.00
5013262   SANTA CLARA                CA     95051  SFD          7.875     6.500  $ 1,957.69      360   1-May-29    $    270,000.00
5013273   SUDBURY                    MA     01776  SFD          7.500     6.500  $ 2,482.22      360   1-May-29    $    355,000.00
5013429   SACRAMENTO                 CA     95831  SFD          7.625     6.500  $ 1,859.77      360   1-May-29    $    262,755.00
5013559   BOCA RATON                 FL     33486  SFD          7.000     6.500  $ 1,850.88      360   1-May-29    $    278,200.00
5013599   CEDAR PARK                 TX     78613  SFD          7.000     6.500  $ 2,022.52      360   1-May-29    $    304,000.00
5013927   NORFOLK                    VA     23505  SFD          6.750     6.483  $ 1,996.71      360   1-May-29    $    307,850.00
5014175   SAN JOSE                   CA     95129  SFD          7.875     6.500  $ 2,980.04      360   1-May-29    $    411,000.00
5014428   MARCO ISLAND               FL     34145  SFD          7.125     6.500  $ 1,940.31      360   1-May-29    $    288,000.00
5014450   WALNUT                     CA     91789  LCO          6.750     6.483  $ 1,849.48      360   1-May-29    $    285,150.00
5014482   NEWPORT BEACH              CA     92660  SFD          7.250     6.500  $ 2,258.01      360   1-May-29    $    331,000.00
5014654   CAMPBELL                   CA     95008  SFD          7.625     6.500  $ 2,571.92      360   1-May-29    $    363,370.00
5014805   TIBURON                    CA     94920  LCO          7.125     6.500  $ 2,492.76      360   1-May-29    $    370,000.00
5014892   VIRGINIA BEACH             VA     32455  SFD          7.125     6.500  $ 1,886.42      360   1-May-29    $    280,000.00
5014893   SAN JOSE                   CA     95119  SFD          7.375     6.500  $ 1,914.56      360   1-May-29    $    277,200.00
5015070   GOLETA                     CA     93117  SFD          6.875     6.500  $ 2,128.45      360   1-May-29    $    324,000.00
5015130   DANVILLE                   CA     94526  PUD          7.375     6.500  $ 1,847.56      360   1-May-29    $    267,500.00
5015423   CUPERTINO                  CA     95014  SFD          7.125     6.500  $ 2,034.63      360   1-May-29    $    302,000.00
5015574   SANTA BARBARA              CA     93105  SFD          6.875     6.500  $ 2,378.09      360   1-May-29    $    362,000.00
5015616   SANTA BARBARA              CA     93108  SFD          7.000     6.500  $ 2,641.26      360   1-May-29    $    397,000.00
5015676   MOUNTAIN VIEW              CA     94040  SFD          7.125     6.500  $ 3,372.64      360   1-May-29    $    500,600.00
5015713   LOS ALTOS                  CA     94022  SFD          7.250     6.500  $ 3,376.78      360   1-May-29    $    495,000.00
5015749   BELTON                     MO     64012  SFD          7.125     6.500  $ 2,273.80      360   1-May-29    $    337,500.00
5015759   PALO ALTO                  CA     94303  SFD          7.625     6.500  $ 2,052.61      360   1-May-29    $    290,000.00
5015798   SAN MATEO                  CA     94404  SFD          7.250     6.500  $ 1,910.10      360   1-May-29    $    280,000.00
5015829   CUPERTINO                  CA     95014  SFD          7.625     6.500  $ 2,958.58      360   1-May-29    $    418,000.00
5015880   SAN MARINO                 CA     91108  SFD          7.375     6.500  $ 2,177.70      360   1-Apr-29    $    315,060.09
5015936   EDMONDS                    WA     98026  SFD          7.500     6.500  $ 1,977.03      360   1-May-29    $    282,750.00
5016039   WOODINVILLE                WA     98072  SFD          7.375     6.500  $ 2,348.30      360   1-May-29    $    340,000.00
5016128   AUSTIN                     TX     78733  SFD          6.750     6.483  $ 2,557.75      360   1-Apr-29    $    394,010.47
5016224   SUNNYVALE                  CA     94086  SFD          7.250     6.500  $ 1,760.02      360   1-May-29    $    258,000.00
5016244   AVON                       NC     27915  SFD          7.000     6.500  $ 3,160.19      360   1-May-29    $    475,000.00
5016299   SARATOGA                   CA     95070  SFD          7.500     6.500  $ 2,237.49      360   1-May-29    $    320,000.00
5016582   CUPERTINO                  CA     95014  SFD          7.125     6.500  $ 2,526.45      360   1-May-29    $    375,000.00
5016638   SARATOGA                   CA     95070  SFD          7.000     6.500  $ 3,589.98      360   1-May-29    $    539,600.00
5016648   CUPERTINO                  CA     95014  SFD          7.125     6.500  $ 3,031.74      360   1-May-29    $    450,000.00
5016736   AGOURA HILLS               CA     91301  SFD          7.000     6.500  $ 1,696.52      360   1-Apr-29    $    254,790.98
5016737   WALNUT CREEK               CA     94596  SFD          7.125     6.500  $ 1,920.06      360   1-May-29    $    284,993.00
5016744   FREMONT                    CA     94555  SFD          7.250     6.500  $ 1,730.00      360   1-Mar-29    $    253,203.13
5016765   SAN JOSE                   CA     95138  PUD          7.000     6.500  $ 3,566.03      360   1-May-29    $    536,000.00
5016780   FOOTHILL RANCH             CA     92610  PUD          7.250     6.500  $ 2,182.96      360   1-Apr-29    $    319,750.37
5016788   SAN MATEO                  CA     94401  SFD          7.125     6.500  $ 2,533.18      360   1-Apr-29    $    375,699.32
5016806   SAN MATEO                  CA     94403  SFD          7.125     6.500  $ 1,926.84      360   1-Apr-29    $    285,771.29
5016993   WARREN                     NJ     07060  SFD          7.000     6.500  $ 2,381.79      360   1-May-29    $    358,000.00
5017113   AMERICAN FORK              UT     84003  SFD          7.125     6.500  $ 1,839.25      360   1-Apr-29    $    272,781.69
5017250   PASADENA                   CA     91105  SFD          7.250     6.500  $ 2,275.06      360   1-Mar-29    $    332,978.09
5017285   GREENVILLE                 SC     29615  SFD          6.875     6.500  $ 1,732.32      360   1-Apr-29    $    263,478.46
5017307   SEATTLE                    WA     98115  SFD          7.125     6.500  $ 2,748.78      360   1-May-29    $    408,000.00
5017373   ENUMCLAW                   WA     98022  SFD          7.375     6.500  $ 1,790.23      360   1-May-29    $    259,200.00
5017519   PLANO                      TX     75093  SFD          6.875     6.500  $ 2,548.89      360   1-May-29    $    388,000.00
5017631   MILL CREEK                 WA     98012  SFD          7.125     6.500  $ 1,794.12      360   1-Apr-29    $    266,087.04
5017749   HALF MOON BAY              CA     94019  SFD          7.125     6.500  $ 2,371.49      360   1-May-29    $    352,000.00
5017800   SAN JOSE                   CA     95129  SFD          7.125     6.500  $ 2,501.19      360   1-May-29    $    371,250.00
5017830   MOUNTAIN VIEW              CA     94040  SFD          6.750     6.483  $ 2,140.38      360   1-May-29    $    330,000.00
5017838   TEMECULA                   CA     92562  SFD          7.375     6.500  $ 2,196.35      360   1-Apr-29    $    317,758.03
5017873   MISSION VIEJO              CA     92692  SFD          6.875     6.500  $ 1,951.08      360   1-Apr-29    $    296,750.49
5018198   BELLEVUE                   WA     98006  SFD          7.000     6.500  $ 2,676.51      360   1-Mar-29    $    401,638.55
5018259   ANAHEIM                    CA     92807  SFD          7.125     6.500  $ 3,368.59      360   1-Apr-29    $    499,600.16
5018264   LOS ALTOS                  CA     94022  SFD          7.000     6.500  $ 3,406.35      360   1-May-29    $    512,000.00
5018294   LIVERMORE                  CA     94550  SFD          7.375     6.500  $ 1,808.53      360   1-Apr-29    $    261,650.76
5018350   OREM                       UT     84058  SFD          6.625     6.358  $ 2,126.47      360   1-Mar-29    $    331,512.38
5018357   MILTON                     MA     02186  SFD          7.250     6.500  $ 2,244.36      360   1-Apr-29    $    328,743.35
5018369   WESTMINSTER                CA     92683  SFD          7.125     6.500  $ 2,000.95      360   1-Apr-29    $    296,762.49
5018379   GLENDALE                   CA     91206  SFD          7.000     6.500  $ 1,889.46      360   1-Apr-29    $    283,767.21
5018421   BENICIA                    CA     94510  SFD          7.250     6.500  $ 1,691.80      360   1-Apr-29    $    247,806.54
5018442   TRABUCO CANYON             CA     92679  SFD          7.000     6.500  $ 1,829.58      360   1-Apr-29    $    274,774.59
5018457   GLENDALE                   CA     91206  SFD          7.250     6.500  $ 1,398.46      360   1-Apr-29    $    204,840.08
5018460   CARLSBAD                   CA     92009  SFD          6.875     6.500  $ 2,562.02      360   1-Apr-29    $    389,672.36
5018465   PLAINFIELD                 IL     60544  SFD          6.750     6.483  $ 1,945.79      360   1-Apr-29    $    299,741.71
5018481   VISTA                      CA     92083  SFD          7.125     6.500  $   976.89      360   1-Apr-29    $    144,884.05
5018489   PLAINFIELD                 IN     46168  SFD          7.125     6.500  $ 1,886.41      360   1-Apr-29    $    279,776.09
5018491   LAUREL                     MD     20723  SFD          6.750     6.483  $ 1,660.41      360   1-Apr-29    $    255,779.59
5018500   TORRANCE                   CA     90505  SFD          7.125     6.500  $ 1,886.41      360   1-Apr-29    $    279,776.09
5018515   IRVINE                     CA     92606  SFD          7.375     6.500  $ 1,902.46      360   1-Apr-29    $    275,240.41
5018533   LAS VEGAS                  NV     89113  SFD          7.250     6.500  $ 1,948.30      360   1-May-29    $    285,600.00
5018536   BURLINGAME                 CA     94010  SFD          6.875     6.500  $ 2,529.18      360   1-Apr-29    $    384,676.55
5018538   SAN MATEO                  CA     94403  SFD          7.250     6.500  $ 1,855.52      360   1-May-29    $    272,000.00
5018589   CAMPBELL                   CA     95008  SFD          7.000     6.500  $ 2,062.44      360   1-May-29    $    310,000.00
5018854   GLENDALE                   CA     91201  SFD          7.375     6.500  $ 1,740.51      360   1-Apr-29    $    251,808.24
5018883   MANHATTAN BEACH            CA     90266  SFD          7.125     6.500  $ 1,984.78      360   1-May-29    $    294,600.00
5018895   SAN JOSE                   CA     95129  SFD          7.875     6.500  $ 3,132.30      360   1-May-29    $    432,000.00
5019053   LAWRENCE                   KS     66047  SFD          6.875     6.500  $ 3,203.19      360   1-May-29    $    487,600.00
5019194   SAN JOSE                   CA     95123  SFD          7.000     6.500  $ 1,961.98      360   1-May-29    $    294,900.00
5019291   GLENDALE                   CA     91208  SFD          7.000     6.500  $ 2,794.28      360   1-May-29    $    420,000.00
5019308   FREMONT                    CA     94536  SFD          7.500     6.500  $ 1,796.99      360   1-May-29    $    257,000.00
5019329   SARATOGA                   CA     95070  SFD          7.250     6.500  $ 2,728.71      360   1-May-29    $    400,000.00
5019341   SAN JOSE                   CA     95129  SFD          6.875     6.500  $ 3,058.66      360   1-May-29    $    465,600.00
5019374   DANBURY                    CT     06811  SFD          7.250     6.500  $ 1,998.78      360   1-May-29    $    293,000.00
5019811   REDONDO BEACH              CA     90277  LCO          7.125     6.500  $ 2,566.87      360   1-Apr-29    $    380,695.32
5019840   SIMI VALLEY                CA     93065  SFD          7.000     6.500  $ 3,239.36      360   1-Apr-29    $    486,500.89
5019855   HONOLULU                   HI     96822  SFD          7.000     6.500  $ 2,727.74      360   1-Apr-29    $    409,663.93
5019966   SAN FRANCISCO              CA     94123  SFD          7.125     6.500  $ 3,031.74      360   1-Apr-29    $    449,640.14
5020452   SAN MARINO                 CA     91108  SFD          7.125     6.500  $ 3,895.78      360   1-May-29    $    578,250.00
5020827   LAGUNA HILLS               CA     92653  SFD          7.250     6.500  $ 1,809.14      360   1-May-29    $    265,200.00
5021007   REDWOOD CITY               CA     94065  SFD          7.000     6.500  $ 2,162.24      360   1-May-29    $    325,000.00
5021008   NORFOLK                    VA     23508  SFD          6.875     6.500  $ 1,803.27      360   1-May-29    $    274,500.00
5021033   SAN MATEO                  CA     94402  SFD          7.125     6.500  $ 3,415.76      360   1-May-29    $    507,000.00
5021040   MILLBRAE                   CA     94030  SFD          6.875     6.500  $ 1,970.79      360   1-Apr-29    $    299,747.96
5021259   SOUTH SAN FRANCISCO        CA     94080  SFD          7.125     6.500  $ 1,681.60      360   1-Apr-29    $    249,400.40
5021740   LONG BEACH                 CA     90807  SFD          7.125     6.500  $ 2,262.35      360   1-Apr-29    $    335,531.47
5021764   LA CANADA-FLINTRIDGE       CA     91011  SFD          7.250     6.500  $ 2,558.17      360   1-May-29    $    375,000.00
5021781   IRVINE                     CA     92614  LCO          7.000     6.500  $ 2,125.65      360   1-May-29    $    319,500.00
5021801   COSTA MESA                 CA     92627  SFD          7.000     6.500  $ 2,341.87      360   1-May-29    $    352,000.00
5021827   SAN JOSE                   CA     95120  SFD          7.000     6.500  $ 2,594.68      360   1-May-29    $    390,000.00
5021829   SOUTHLAKE                  TX     76092  SFD          7.125     6.500  $ 2,268.42      360   1-May-29    $    336,700.00
5021872   LAGUNA NIGUEL              CA     92677  SFD          7.375     6.500  $ 2,555.50      360   1-Apr-29    $    369,718.46
5021917   PISMO BEACH                CA     93449  SFD          7.000     6.500  $ 2,368.48      360   1-May-29    $    356,000.00
5021945   NEWPORT BEACH              CA     92660  SFD          6.875     6.500  $ 4,247.05      360   1-Apr-29    $    645,956.86
5021946   COTO DE CAZA AREA          CA     92679  SFD          7.250     6.500  $ 1,991.96      360   1-May-29    $    292,000.00
5021977   COVINA                     CA     91724  SFD          7.250     6.500  $ 2,094.29      360   1-May-29    $    307,000.00
5022155   POMONA                     CA     91768  SFD          7.375     6.500  $ 1,785.40      360   1-Apr-29    $    258,303.30
5022188   SUNNYVALE                  CA     94087  SFD          7.250     6.500  $ 2,728.71      360   1-May-29    $    400,000.00
5023087   LAGUNA NIGUEL              CA     92677  SFD          7.375     6.500  $ 2,141.10      360   1-Apr-29    $    309,764.11
5023762   SAN FRANCISCO              CA     94133  LCO          7.000     6.500  $ 3,276.62      360   1-May-29    $    492,500.00
5023975   SUNNYVALE                  CA     94087  SFD          7.375     6.500  $ 2,016.78      360   1-Apr-29    $    291,777.81
5024006   CYPRESS                    CA     90630  SFD          6.875     6.500  $ 1,826.27      360   1-May-29    $    278,000.00
5024033   RANCHO PALOS VERDE         CA     90275  SFD          7.250     6.500  $ 2,124.98      360   1-May-29    $    311,500.00
5024540   AUSTIN                     TX     78746  LCO          7.250     6.500  $ 2,128.39      360   1-May-29    $    312,000.00
5024853   LOS ANGELES                CA     90293  SFD          7.250     6.500  $ 3,199.41      360   1-May-29    $    469,000.00
5024922   REDWOOD CITY               CA     94061  SFD          7.250     6.500  $ 1,691.80      360   1-May-29    $    248,000.00
5025006   SANTA CRUZ                 CA     95062  SFD          7.125     6.500  $ 2,358.02      360   1-Apr-29    $    349,720.11
5026123   SAN JOSE                   CA     95130  SFD          7.875     6.500  $ 2,049.05      360   1-Mar-29    $    282,209.75
5026912   RANCHO CUCAMONGA           CA     91737  SFD          7.125     6.500  $ 1,940.31      360   1-May-29    $    288,000.00
5029303   MANHASSET                  NY     11030  SFD          7.375     6.500  $ 3,108.04      360   1-May-29    $    450,000.00
5029430   SAN DIEGO                  CA     92130  SFD          7.375     6.500  $ 3,543.16      360   1-May-29    $    513,000.00
5029493   WALNUT                     CA     91789  SFD          7.500     6.500  $ 2,237.49      360   1-May-29    $    320,000.00
5029637   SAN FRANCISCO              CA     94116  SFD          7.375     6.500  $ 3,259.99      360   1-May-29    $    472,000.00
5029726   SHELBY TOWNSHIP            MI     48316  SFD          7.750     6.500  $   823.88      360   1-May-29    $    115,000.00
5029838   REDMOND                    WA     98053  SFD          7.375     6.500  $ 4,405.47      360   1-May-29    $    637,850.00
5029857   STUDIO CITY                CA     91604  SFD          7.375     6.500  $ 1,705.97      360   1-May-29    $    247,000.00
6767563   GYPSUM                     CO     81637  SFD          7.250     6.500  $ 1,534.90      360   1-May-29    $    225,000.00
6815115   SIOUX CITY                 IA     51106  SFD          7.375     6.500  $ 1,705.97      360   1-Apr-29    $    246,812.05
6827394   MONTROSE                   CO     81401  SFD          7.375     6.500  $ 2,127.28      360   1-May-29    $    308,000.00
6827558   SUGARLAND                  TX     77479  SFD          7.125     6.500  $ 4,197.27      360   1-Apr-29    $    622,501.79
6875335   CHARLOTTE                  NC     28211  SFD          6.750     6.483  $ 2,678.71      360   1-Apr-29    $    412,644.42
6878689   LINDON                     UT     84042  SFD          7.375     6.500  $ 1,954.61      360   1-May-29    $    283,000.00
6895051   BRECKENRIDGE               CO     80424  SFD          7.000     6.500  $ 3,632.55      360   1-May-29    $    546,000.00
6903437   TRABUCO CANYON             CA     92679  PUD          7.125     6.500  $ 1,718.32      360   1-Sep-28    $    253,383.99
6912694   SHERIDAN                   WY     82801  SFD          7.250     6.500  $ 2,660.49      360   1-May-29    $    390,000.00
6926841   NEWFIELDS                  NH     03856  SFD          7.875     6.500  $ 1,950.44      360   1-Jul-28    $    267,089.80
6930817   PARK CITY                  UT     84060  SFD          7.375     6.500  $ 6,216.08      360   1-May-29    $    900,000.00
6949121   BASALT                     CO     81621  SFD          7.375     6.500  $ 5,180.06      360   1-Apr-29    $    749,429.31
6959942   CASTLE ROCK                CO     80104  SFD          7.500     6.500  $ 2,658.41      360   1-May-29    $    380,200.00
6975468   BURIEN                     WA     98146  SFD          7.250     6.500  $ 2,674.13      360   1-Apr-29    $    391,694.20
6975821   TWEKSBURY TWP              NJ     07830  SFD          6.500     6.233  $ 2,022.62      360   1-May-29    $    320,000.00
7042717   WETHERSFIELD               CT     06109  SFD          7.375     6.500  $ 1,768.13      360   1-Mar-29    $    255,307.36
7071790   ELK GROVE                  CA     95758  SFD          7.375     6.500  $ 2,621.70      360   1-Apr-29    $    379,296.17
7072781   PLEASANTON                 CA     94566  SFD          6.750     6.483  $ 2,107.94      360   1-Apr-29    $    324,720.19
7085910   BOULDERT                   CO     80301  SFD          7.125     6.500  $ 3,934.52      360   1-May-29    $    584,000.00
7087022   CASTLE ROCK                CO     80104  SFD          7.125     6.500  $ 2,587.08      360   1-May-29    $    384,000.00
7092218   SHREWSBURY                 MA     01545  SFD          7.250     6.500  $ 1,987.73      360   1-Apr-29    $    291,152.69
7094563   LANDENBURG                 PA     19350  SFD          7.000     6.500  $ 3,326.51      360   1-Mar-29    $    499,172.90
7102093   BRYN MAWR                  PA     19010  SFD          6.625     6.358  $ 5,029.00      360   1-Apr-29    $    784,707.06
7104385   WINTER PARK                FL     32789  SFD          7.375     6.500  $ 1,761.22      360   1-May-29    $    255,000.00
7106073   CHANDLER                   AZ     85224  SFD          7.375     6.500  $ 2,491.27      360   1-Apr-29    $    360,425.53
7109006   ALBUQUERQUE                NM     87107  SFD          6.750     6.483  $ 2,918.69      360   1-Apr-29    $    449,612.56
7119959   LAGUNA NIGUEL              CA     92677  SFD          6.500     6.233  $ 5,372.58      360   1-Apr-29    $    849,231.59
7129734   BARRINGTON                 IL     60010  SFD          7.375     6.500  $ 3,246.17      360   1-Oct-28    $    467,449.97
7137758   WEST DES MOINES            IA     50266  SFD          7.125     6.500  $ 1,751.67      360   1-May-29    $    260,000.00
7143190   SAN DIEGO                  CA     92121  SFD          6.750     6.483  $ 2,059.95      360   1-Feb-29    $    316,775.03
7145467   VALENCIA                   CA     91354  LCO          7.500     6.500  $ 1,194.83      360   1-Apr-29    $    170,755.18
7145880   COROLLA                    NC     27927  SFD          7.375     6.500  $ 2,579.03      240   1-Apr-19    $    322,607.30
7154026   CHESTERFIELD               MO     63005  SFD          7.125     6.500  $ 2,021.16      360   1-Apr-29    $    299,760.09
7201311   GERMANTOWN                 MD     20876  SFD          7.250     6.500  $ 1,729.32      360   1-Mar-29    $    253,103.29
7207800   CHESTERFIELD               VA     23838  SFD          6.875     6.500  $ 3,626.25      360   1-Apr-29    $    551,436.25
7209152   ANAHEIM                    CA     92807  SFD          6.750     6.483  $ 5,902.24      360   1-Jan-29    $    906,839.49
7213715   HOUSTON                    TX     77005  SFD          7.000     6.500  $ 2,277.33      360   1-Apr-29    $    342,019.42
7238066   LA HABRA                   CA     90631  SFD          7.125     6.500  $ 2,684.09      360   1-Mar-29    $    397,760.93
7238225   DENVER                     CO     80220  SFD          7.125     6.500  $ 2,061.24      360   1-Apr-29    $    305,705.34
7281478   NORTH WALES                PA     19454  SFD          7.875     6.500  $ 2,175.21      360   1-Apr-29    $    299,793.54
7282267   PACIFICA                   CA     94044  SFD          7.125     6.500  $ 2,260.48      360   1-Mar-29    $    334,743.84
7282340   LEESBURG                   VA     20175  SFD          6.625     6.358  $ 2,068.52      360   1-Apr-29    $    322,764.99
7292381   SIOUX FALLS                SD     57103  SFD          7.000     6.500  $ 1,649.95      360   1-May-29    $    248,000.00
7295870   KENNEBUNKPORT              ME     04046  SFD          7.500     6.500  $ 2,127.01      360   1-Mar-29    $    303,747.07
7311376   SAN DIEGO                  CA     92121  SFD          6.875     6.500  $ 1,832.83      360   1-May-29    $    279,000.00
7316938   SAN RAFAEL                 CA     94901  SFD          7.375     6.500  $ 2,486.43      360   1-Apr-29    $    359,726.07
7324996   MARION                     IA     52302  SFD          6.875     6.500  $ 2,494.69      360   1-Apr-29    $    379,430.96
7338836   SAN DIEGO                  CA     92127  SFD          7.000     6.500  $ 1,749.75      360   1-Nov-28    $    261,687.48
7341951   VALENCIA                   CA     91354  PUD          7.250     6.500  $ 2,386.04      360   1-Mar-29    $    349,221.65
7345759   EDEN PRAIRIE               MN     55346  SFD          7.125     6.500  $ 2,088.53      360   1-May-29    $    310,000.00
7357937   HERNDON                    VA     20171  SFD          6.500     6.233  $ 1,790.02      360   1-Apr-29    $    282,943.98
7373468   SAN DIEGO                  CA     92130  SFD          7.125     6.500  $ 2,920.57      360   1-Apr-29    $    433,153.34
7381260   CALABASAS                  CA     91302  SFD          6.875     6.500  $ 4,598.50      360   1-May-29    $    700,000.00
7386416   CARLSBAD                   CA     92009  SFD          7.250     6.500  $ 1,732.73      360   1-Apr-29    $    253,801.85
7390679   GILROY                     CA     95020  SFD          7.375     6.500  $ 2,484.50      360   1-Apr-29    $    359,446.28
7393592   PARADISE VALLEY            AZ     85253  SFD          7.625     6.500  $ 5,322.61      360   1-Dec-28    $    749,243.81
7396835   LOS ANGELES                CA     90077  SFD          7.500     6.500  $ 2,209.52      360   1-Apr-29    $    315,765.48
7407434   MILLERSVILLE               MD     21108  SFD          7.375     6.500  $ 2,344.15      360   1-May-29    $    339,400.00
7409701   AMES                       IA     50014  SFD          7.500     6.500  $ 2,517.17      360   1-May-29    $    360,000.00
7411417   CARLSBAD                   CA     92009  LCO          7.375     6.500  $ 1,899.70      360   1-Mar-29    $    274,630.14
7411587   LYME CENTER                NH     03769  SFD          7.125     6.500  $ 1,940.31      360   1-Apr-29    $    287,769.69
7418353   LEESBURG                   VA     20175  SFD          7.000     6.500  $ 1,640.97      360   1-May-29    $    246,650.00
7425142   OAK PARK                   CA     91301  SFD          7.125     6.500  $ 3,874.89      360   1-Apr-29    $    574,690.06
7431602   POTOMAC                    MD     20854  SFD          6.750     6.483  $ 3,009.03      360   1-Apr-29    $    463,528.57
7440757   PHOENIX                    AZ     85027  SFD          7.250     6.500  $ 1,801.29      360   1-May-29    $    264,050.00
7447268   CAMBRIA                    CA     93428  SFD          7.000     6.500  $ 4,237.98      360   1-Apr-29    $    636,477.85
7454292   BOWIE                      MD     20715  SFD          7.500     6.500  $ 1,759.28      360   1-May-29    $    251,608.00
7460363   WEST LINN                  OR     97068  SFD          6.500     6.233  $ 2,381.63      360   1-Apr-29    $    376,459.37
7476110   ASPEN                      CO     81611  SFD          7.125     6.500  $ 3,233.85      360   1-Apr-29    $    479,616.15
7481387   CARLSBAD                   CA     92009  SFD          7.125     6.500  $ 2,046.10      360   1-Apr-29    $    303,459.13
7483764   BORING                     OR     97009  SFD          7.625     6.500  $ 1,875.65      360   1-May-29    $    265,000.00
7485252   VIENNA                     VA     22181  SFD          6.500     6.233  $ 2,882.23      360   1-Apr-29    $    455,587.77
7487340   ROCKVILLE                  MD     20850  SFD          7.000     6.500  $ 3,379.74      360   1-Apr-29    $    507,583.59
7490582   RESTON                     VA     20194  SFD          6.750     6.483  $ 2,122.21      360   1-Apr-29    $    326,918.29
7503036   WOODBURY                   MN     55125  SFD          7.125     6.500  $ 2,673.32      360   1-Apr-29    $    396,482.68
7510337   SANTA CLARA                CA     95054  SFD          7.875     6.500  $ 2,128.14      360   1-May-29    $    293,508.00
7513065   CASTAIC AREA               CA     91384  SFD          7.500     6.500  $ 1,833.69      360   1-Mar-29    $    261,859.53
7514482   MISSION VIEJO              CA     92692  SFD          7.375     6.500  $ 2,336.55      360   1-Apr-29    $    338,042.59
7515478   MISSION VIEJO              CA     92692  SFD          7.125     6.500  $ 2,490.74      360   1-Mar-29    $    369,106.95
7519437   MISSION VIEJO              CA     92692  SFD          7.250     6.500  $ 2,355.21      360   1-Apr-29    $    344,980.68
7520403   ASPEN                      CO     81611  LCO          7.500     6.500  $ 2,517.17      360   1-Apr-29    $    359,732.83
7522203   FRESNO                     CA     93720  SFD          7.250     6.500  $ 1,688.39      360   1-Mar-29    $    247,112.68
7529861   SAN JOSE                   CA     95111  SFD          7.375     6.500  $ 1,788.85      360   1-Apr-29    $    258,802.92
7531174   LAGUNA NIGUEL              CA     92677  SFD          7.375     6.500  $ 5,166.25      360   1-Apr-29    $    747,430.83
7532093   OAK PARK                   CA     91301  SFD          7.250     6.500  $ 3,545.61      360   1-Apr-29    $    519,344.55
7534585   EL CERRITO                 CA     94530  SFD          7.625     6.500  $ 1,902.55      360   1-Apr-29    $    268,605.45
7538809   WEST BABYLON               NY     11704  SFD          7.250     6.500  $ 1,662.80      360   1-Mar-29    $    243,368.57
7540152   COLLIERVILLE               TN     38017  SFD          7.375     6.500  $ 1,932.68      360   1-Apr-29    $    279,612.08
7541255   COLBERT                    WA     99005  SFD          7.250     6.500  $ 1,801.63      360   1-Apr-29    $    263,893.97
7541521   LONGMONT                   CO     80503  SFD          7.250     6.500  $ 2,449.01      360   1-Feb-29    $    358,154.76
7543248   SAN FRANCISCO              CA     94110  MF2          7.250     6.500  $ 2,564.98      360   1-Apr-29    $    375,706.69
7544344   ENGLEWOOD CLIFFS           NJ     07631  SFD          7.000     6.500  $ 2,993.86      360   1-May-29    $    450,000.00
7549141   TUCSON                     AZ     85739  SFD          7.125     6.500  $ 1,882.71      360   1-May-29    $    279,450.00
7550906   LAGUNA NIGUEL              CA     92677  SFD          6.875     6.500  $ 1,678.45      360   1-Apr-29    $    255,285.35
7552774   BRISBANE                   CA     94005  LCO          6.875     6.500  $ 2,580.42      360   1-Apr-29    $    392,470.00
7557547   SAN DIEGO                  CA     92122  SFD          7.250     6.500  $ 2,592.27      360   1-May-29    $    380,000.00
7558679   SANTA CLARA                CA     95054  SFD          7.375     6.500  $ 2,526.88      360   1-Apr-29    $    365,577.61
7558682   SANTA CLARA                CA     95054  SFD          7.375     6.500  $ 1,988.87      360   1-May-29    $    287,960.00
7562947   REDWOOD CITY               CA     94065  SFD          7.000     6.500  $ 2,162.23      360   1-May-29    $    325,000.00
7563802   CHULA VISTA                CA     91915  SFD          7.500     6.500  $ 1,974.23      360   1-Apr-29    $    282,140.46
7565087   MORGAN HILL                CA     95037  SFD          7.000     6.500  $ 3,326.51      360   1-Apr-29    $    499,590.16
7565309   CORDOVA                    TN     38018  SFD          6.875     6.500  $ 3,521.14      360   1-Apr-29    $    535,549.69
7566700   CAMARILLO                  CA     93012  SFD          6.875     6.500  $ 2,058.49      360   1-Mar-29    $    312,821.98
7567047   EDEN PRAIRIE               MN     55346  SFD          7.250     6.500  $ 1,899.18      360   1-Apr-29    $    278,182.82
7572109   AUSTIN                     TX     78733  SFD          7.000     6.500  $ 2,203.15      360   1-Mar-29    $    330,605.53
7576737   ASPEN                      CO     81611  LCO          7.375     6.500  $ 2,320.67      360   1-May-29    $    336,000.00
7581186   LOUISVILLE                 KY     40241  SFD          7.250     6.500  $ 1,910.09      360   1-May-29    $    280,000.00
7581545   SEAL BEACH                 CA     90743  PUD          6.875     6.500  $ 5,583.89      360   1-Mar-29    $    848,567.71
7583086   LAYTONSVILLE               MD     20882  SFD          7.250     6.500  $ 1,964.67      360   1-May-29    $    288,000.00
7585296   SAN DIEGO                  CA     92131  SFD          7.375     6.500  $ 2,141.09      360   1-Apr-29    $    309,764.12
7586697   HINSDALE                   IL     60521  SFD          7.375     6.500  $ 2,210.16      360   1-Apr-29    $    319,756.51
7587338   DANVILLE                   CA     94526  SFD          7.000     6.500  $ 2,328.56      360   1-May-29    $    350,000.00
7587907   CHAPEL HILL                NC     27514  SFD          7.250     6.500  $ 2,046.53      360   1-Apr-29    $    299,765.97
7588919   ARLINGTON                  VA     22201  SFD          7.500     6.500  $ 2,281.19      360   1-Apr-29    $    326,007.87
7590465   KEY WEST                   FL     33040  SFD          7.000     6.500  $ 2,062.44      360   1-Mar-29    $    309,490.30
7590565   SAN DIEGO                  CA     92115  SFD          7.000     6.500  $ 1,886.13      360   1-Apr-29    $    283,267.42
7593659   SAN DIEGO                  CA     92130  SFD          7.375     6.500  $ 2,797.23      360   1-Apr-29    $    404,691.83
7594629   DEL MAR                    CA     92014  SFD          7.000     6.500  $ 4,723.65      360   1-Apr-29    $    709,418.02
7596148   FLOSSMOOR                  IL     60422  SFD          7.875     6.500  $ 1,894.24      360   1-May-29    $    261,250.00
7598215   IRVINE                     CA     92612  LCO          6.875     6.500  $ 1,767.14      360   1-Apr-29    $    268,774.01
7599638   LITTLETON                  CO     80128  SFD          6.750     6.483  $ 2,270.09      360   1-May-29    $    350,000.00
7600453   ATLANTA                    GA     30327  SFD          6.750     6.483  $ 2,837.62      360   1-Apr-29    $    437,123.32
7600690   MONTGOMERY                 NJ     08502  SFD          7.250     6.500  $ 1,773.66      360   1-May-29    $    260,000.00
7601146   SAN DIEGO                  CA     92121  SFD          6.875     6.500  $ 1,875.53      360   1-May-29    $    285,500.00
7601660   SAN DIEGO                  CA     92130  SFD          6.875     6.500  $ 3,674.20      360   1-Apr-29    $    557,830.12
7601771   APTOS                      CA     95003  SFD          7.250     6.500  $ 2,862.60      360   1-May-29    $    419,628.00
7602482   PHOENIX                    AZ     85023  SFD          6.875     6.500  $ 1,970.79      360   1-Apr-29    $    299,747.96
7602562   MERCER ISLAND              WA     98040  SFD          6.500     6.233  $ 3,792.41      360   1-Apr-29    $    599,457.59
7603306   SAN JOSE                   CA     95118  SFD          7.500     6.500  $ 1,873.89      360   1-May-29    $    268,000.00
7603439   BOW MAR                    CO     80123  SFD          6.500     6.233  $ 2,054.22      360   1-May-29    $    325,000.00
7603616   ALISO VIEJO AREA           CA     92656  LCO          7.500     6.500  $ 2,010.59      360   1-May-29    $    287,550.00
7604148   KANEOHE                    HI     96744  SFD          7.125     6.500  $ 2,533.18      360   1-Apr-29    $    375,699.32
7604308   LAGUNA BEACH               CA     92651  SFD          7.000     6.500  $ 1,896.11      360   1-Apr-29    $    284,766.39
7604310   INDIAN WELLS               CA     92210  PUD          7.375     6.500  $ 2,331.03      360   1-May-29    $    337,500.00
7605270   SHORT HILLS                NJ     07078  SFD          7.000     6.500  $ 2,868.78      360   1-Apr-29    $    430,846.55
7605320   TAMPA                      FL     33609  SFD          7.000     6.500  $ 1,862.85      360   1-Mar-29    $    279,539.62
7606099   FAIR OAKS                  CA     95628  SFD          7.375     6.500  $ 2,313.76      360   1-Apr-29    $    334,745.09
7606492   BARRINGTON                 IL     60010  SFD          7.250     6.500  $ 2,169.32      360   1-Apr-29    $    317,751.93
7607922   SHOREWOOD                  MN     55331  SFD          7.000     6.500  $ 2,583.04      360   1-Apr-29    $    387,931.75
7608710   NEWPORT COAST              CA     92657  SFD          6.875     6.500  $ 3,375.30      360   1-Apr-29    $    513,368.35
7608725   DANVILLE                   IN     46122  SFD          7.375     6.500  $ 1,933.89      360   1-Mar-29    $    278,562.57
7609104   RICHBORO                   PA     18954  SFD          7.375     6.500  $ 2,043.71      360   1-Mar-29    $    295,448.30
7609290   HOLMDEL                    NJ     07733  LCO          7.125     6.500  $ 2,762.25      360   1-May-29    $    410,000.00
7609866   FOXFIELD                   CO     80016  SFD          6.750     6.483  $ 3,405.14      360   1-Apr-29    $    524,547.99
7609961   OAKTON                     VA     22124  PUD          6.500     6.233  $ 1,762.52      360   1-May-29    $    278,850.00
7610060   CARLSBAD                   CA     92009  SFD          6.625     6.358  $ 1,920.93      360   1-Apr-29    $    299,735.32
7610071   REDLANDS                   CA     92373  SFD          7.375     6.500  $ 2,748.83      360   1-Apr-29    $    397,689.16
7610506   CHATHAM                    NJ     07928  SFD          7.250     6.500  $ 2,899.25      360   1-May-29    $    425,000.00
7611115   PHOENIXVILLE               PA     19460  SFD          7.250     6.500  $ 2,124.09      360   1-Apr-29    $    311,126.10
7611231   BAKERSFIELD                CA     93312  SFD          7.250     6.500  $ 1,884.85      360   1-May-29    $    276,300.00
7611267   IRVINE                     CA     92620  SFD          7.125     6.500  $ 1,711.24      360   1-May-29    $    254,000.00
7612042   LAGUNA NIGUEL              CA     92677  SFD          7.875     6.500  $ 2,806.02      360   1-Apr-29    $    386,731.79
7612097   ROCKLIN                    CA     95765  SFD          7.000     6.500  $ 2,148.93      360   1-Apr-29    $    322,735.24
7612156   CHANDLER                   AZ     85224  SFD          7.125     6.500  $ 1,991.12      360   1-Apr-29    $    295,305.66
7612689   VISALIA                    CA     93291  SFD          6.875     6.500  $ 4,124.86      360   1-Apr-29    $    627,372.48
7613327   WARREN TOWNSHIP            NJ     07069  SFD          6.750     6.483  $ 2,801.94      360   1-Apr-29    $    431,628.06
7613815   CLAYTON                    CA     94517  SFD          6.750     6.483  $ 1,709.06      360   1-Apr-29    $    263,273.13
7614844   GREAT FALLS                VA     22066  SFD          6.750     6.483  $ 2,931.66      360   1-Apr-29    $    451,554.89
7615530   BENICIA                    CA     94510  SFD          6.500     6.233  $ 1,738.19      360   1-Apr-29    $    274,751.39
7616241   SAN JOSE                   CA     95136  SFD          7.625     6.500  $ 2,123.38      360   1-Apr-29    $    299,782.87
7616591   NEWPORT                    CA     92660  LCO          6.875     6.500  $ 3,284.64      360   1-May-29    $    500,000.00
7617473   PIEDMONT                   CA     94611  SFD          6.500     6.233  $ 1,896.20      360   1-Apr-29    $    299,728.80
7617525   LITTLETON                  CO     80123  SFD          7.500     6.500  $ 2,971.66      360   1-Apr-29    $    424,684.59
7617531   WHITTIER                   CA     90603  SFD          7.625     6.500  $ 2,831.17      360   1-Apr-29    $    399,710.50
7617694   LOS ANGELES                CA     90292  LCO          7.250     6.500  $ 5,184.54      360   1-Apr-29    $    759,407.13
7617717   DARIEN                     CT     06820  SFD          7.000     6.500  $ 2,501.54      360   1-Mar-29    $    375,381.79
7618385   ALBUQUERQUE                NM     87111  SFD          6.750     6.483  $ 2,587.91      360   1-Mar-29    $    398,311.00
7618858   UNION CITY                 CA     94587  SFD          7.000     6.500  $ 2,130.64      360   1-May-29    $    320,252.00
7619538   MILPITAS                   CA     95035  SFD          7.250     6.500  $ 2,395.76      360   1-Apr-29    $    350,920.04
7620105   FAIRFIELD                  CT     06490  SFD          6.875     6.500  $ 4,237.19      360   1-Apr-29    $    644,458.12
7620989   WILMINGTON                 NC     28405  SFD          6.875     6.500  $ 2,496.33      360   1-May-29    $    380,000.00
7621188   SAN RAMON                  CA     94583  LCO          7.375     6.500  $ 1,899.01      360   1-Apr-29    $    274,740.79
7622210   PRINCETON                  NJ     08540  SFD          7.250     6.500  $ 3,069.79      360   1-May-29    $    450,000.00
7622516   GOLD RIVER                 CA     95670  SFD          7.250     6.500  $ 2,110.46      360   1-Apr-29    $    309,129.66
7622569   ATLANTA                    GA     30306  SFD          7.000     6.500  $ 1,795.65      360   1-Mar-29    $    269,456.25
7623059   AVALON                     NJ     08202  LCO          7.250     6.500  $ 1,828.23      360   1-Apr-29    $    267,790.94
7624338   SHERWOOD                   OR     97140  SFD          6.875     6.500  $ 1,944.51      360   1-Apr-29    $    295,685.48
7624389   HERNDON                    VA     20171  SFD          7.125     6.500  $ 1,960.86      360   1-Apr-29    $    290,817.25
7624978   POOLESVILLE                MD     20837  SFD          6.875     6.500  $ 1,805.24      360   1-Apr-29    $    274,240.22
7624994   ATLANTA                    GA     30327  SFD          6.625     6.358  $ 4,162.02      360   1-Mar-29    $    648,849.88
7625143   UKIAH                      CA     95482  SFD          7.375     6.500  $ 1,942.52      360   1-Apr-29    $    281,036.00
7625657   FAYETTEVILLE               GA     30215  SFD          7.250     6.500  $ 1,790.71      360   1-Apr-29    $    262,295.23
7626750   SUPERIOR                   CO     80027  SFD          6.750     6.483  $ 1,893.91      360   1-Apr-29    $    291,748.59
7626776   MANHATTAN BEACH            CA     90266  SFD          7.500     6.500  $ 6,992.15      360   1-Apr-29    $    999,250.00
7627003   EAU CLAIRE                 WI     54701  SFD          7.500     6.500  $ 3,915.60      360   1-May-29    $    560,000.00
7627249   RENO                       NV     89509  SFD          7.250     6.500  $ 1,945.57      360   1-Apr-29    $    284,977.51
7627859   LAS VEGAS                  NV     89134  PUD          7.125     6.500  $ 2,015.77      360   1-Mar-29    $    298,720.04
7627982   CAMBRIDGE                  MA     02138  LCO          6.875     6.500  $ 2,135.02      360   1-Apr-29    $    324,726.96
7629825   EASTHAM                    MA     02642  SFD          7.625     6.500  $ 2,255.03      360   1-May-29    $    318,600.00
7630059   RICHMOND                   VA     23233  SFD          7.375     6.500  $ 1,771.58      360   1-May-29    $    256,500.00
7630079   LOS ALTOS HILLS            CA     94022  SFD          7.250     6.500  $ 3,353.58      360   1-May-29    $    491,600.00
7630396   CHAPEL HILL                NC     27516  SFD          7.000     6.500  $ 2,049.13      360   1-May-29    $    308,000.00
7631062   SAN DIEGO                  CA     92131  SFD          7.125     6.500  $ 2,593.82      360   1-May-29    $    385,000.00
7631065   OCEAN CITY                 NJ     08226  LCO          7.625     6.500  $ 3,057.67      360   1-May-29    $    432,000.00
7631362   CARMEL                     CA     93923  SFD          7.125     6.500  $ 2,499.50      360   1-May-29    $    371,000.00
7631508   WALNUT CREEK               CA     94596  SFD          6.875     6.500  $ 2,470.05      360   1-Apr-29    $    375,684.12
7633253   SAN RAMON                  CA     94583  SFD          7.625     6.500  $ 2,165.85      360   1-May-29    $    306,000.00
7633818   BROOKFIELD                 WI     53045  SFD          7.375     6.500  $ 2,580.36      360   1-May-29    $    373,600.00
7635532   DALY CITY                  CA     94015  SFD          7.125     6.500  $ 2,038.00      360   1-May-29    $    302,500.00
7635743   SANTA CRUZ                 CA     95060  SFD          7.375     6.500  $ 3,309.72      360   1-Apr-29    $    478,835.36
7636032   EDINA                      MN     55439  SFD          7.125     6.500  $ 4,042.31      360   1-Apr-29    $    599,520.19
7636106   SAN DIEGO                  CA     92110  SFD          7.125     6.500  $ 1,778.62      360   1-Apr-29    $    263,788.88
7636812   SAN JOSE                   CA     95124  SFD          7.000     6.500  $ 2,847.49      360   1-May-29    $    428,000.00
7636819   BAINBRIDGE ISLAND          WA     98110  SFD          6.625     6.358  $ 2,878.84      360   1-May-29    $    449,600.00
7638199   DUNWOODY                   GA     30338  SFD          7.125     6.500  $ 2,610.66      360   1-Apr-29    $    387,190.12
7638305   ISSAQUAH                   WA     98027  SFD          7.500     6.500  $ 4,544.89      360   1-May-29    $    650,000.00
7639435   ROSWELL                    GA     30076  SFD          7.000     6.500  $ 2,015.60      360   1-Apr-29    $    302,711.67
7640138   PORTLAND                   OR     97229  SFD          7.000     6.500  $ 2,162.23      360   1-May-29    $    325,000.00
7640353   NASHVILLE                  TN     37215  SFD          7.250     6.500  $ 1,920.45      360   1-May-29    $    281,518.00
7641317   BULLHEAD CITY              AZ     86442  SFD          7.375     6.500  $ 2,438.08      360   1-Apr-29    $    352,731.40
7641987   REDMOND                    WA     98052  SFD          7.250     6.500  $ 2,332.74      360   1-Apr-29    $    341,688.24
7642214   BERKELEY                   CA     94708  SFD          7.250     6.500  $ 2,728.71      360   1-Apr-29    $    399,687.96
7642266   NORTH WALES                PA     19454  SFD          6.500     6.233  $ 1,744.51      360   1-May-29    $    276,000.00
7642391   PORT JEFFERSON             NY     11777  LCO          7.250     6.500  $ 1,821.41      360   1-Apr-29    $    266,791.72
7642577   SONOMA                     CA     95476  SFD          7.250     6.500  $ 2,292.11      360   1-Apr-29    $    335,737.89
7643086   BOWIE                      MD     20721  SFD          7.375     6.500  $ 2,707.45      360   1-Apr-29    $    391,701.72
7643202   KIOWA                      CO     80117  SFD          6.625     6.358  $ 2,241.09      360   1-Apr-29    $    349,691.20
7643525   CASWELL BEACH              NC     28461  SFD          7.125     6.500  $ 2,189.59      360   1-Apr-29    $    324,740.10
7643582   BURBANK                    CA     91506  SFD          6.750     6.483  $ 1,764.19      360   1-Apr-29    $    271,765.81
7643621   HOUSTON                    TX     77005  SFD          7.000     6.500  $ 2,059.94      360   1-Apr-29    $    309,371.21
7643870   SNOWMASS VILLAGE           CO     81615  LCO          7.125     6.500  $ 4,716.03      360   1-May-29    $    700,000.00
7645092   MILPITAS                   CA     95035  LCO          7.625     6.500  $   707.79      360   1-May-29    $    100,000.00
7645401   HICKORY                    NC     28601  SFD          7.250     6.500  $ 2,161.68      360   1-May-29    $    316,880.00
7645470   TRUCKEE                    CA     96161  SFD          7.375     6.500  $ 3,867.78      360   1-May-29    $    560,000.00
7645629   APTOS                      CA     95003  SFD          7.250     6.500  $ 3,001.58      360   1-Apr-29    $    439,656.75
7645780   SHINGLE SPRINGS            CA     95682  SFD          6.875     6.500  $ 2,286.11      360   1-May-29    $    348,000.00
7645885   SACRAMENTO                 CA     95818  SFD          7.375     6.500  $ 2,486.43      360   1-Apr-29    $    359,726.07
7646039   BETHESDA                   MD     20816  SFD          7.250     6.500  $ 2,109.30      360   1-Apr-29    $    308,959.79
7646115   BILLINGS                   MT     59106  SFD          6.875     6.500  $ 1,970.79      360   1-Apr-29    $    299,747.96
7646136   LONGWOOD                   FL     32779  SFD          7.125     6.500  $ 2,364.75      360   1-Apr-29    $    350,719.31
7646214   REDMOND                    WA     98052  SFD          7.375     6.500  $ 2,362.11      360   1-Apr-29    $    341,739.76
7647125   HERNDON                    VA     20170  SFD          6.625     6.358  $ 1,879.95      360   1-Apr-29    $    293,340.97
7647738   NEW BERLIN                 WI     53151  SFD          7.000     6.500  $ 2,208.80      360   1-Apr-29    $    331,727.87
7648089   OXNARD                     CA     93035  SFD          7.000     6.500  $ 3,166.84      360   1-May-29    $    476,000.00
7648490   GOSHON                     CT     06756  SFD          7.875     6.500  $   688.82      360   1-May-29    $     95,000.00
7648928   WOODSIDE                   NY     11377  MF2          7.250     6.500  $ 2,148.86      360   1-May-29    $    315,000.00
7649097   GIG HARBOR                 WA     98332  SFD          7.125     6.500  $ 2,358.01      360   1-Apr-29    $    349,720.12
7650048   TWP OF MONTCLAIR           NJ     07043  SFD          7.500     6.500  $ 2,643.03      360   1-May-29    $    378,000.00
7650626   TRABUCO CANYON             CA     92679  SFD          6.625     6.358  $ 2,340.34      360   1-Apr-29    $    365,177.52
7650676   SAN MARCOS                 CA     92069  SFD          7.125     6.500  $ 1,854.07      360   1-May-29    $    275,200.00
7650878   LAGUNA NIGUEL              CA     92677  SFD          7.250     6.500  $ 6,446.57      360   1-Apr-29    $    944,262.81
7651490   WELLINGTON                 FL     33414  SFD          7.000     6.500  $ 1,880.14      360   1-Apr-29    $    282,368.36
7652033   ROCHESTER HILLS            MI     48306  SFD          7.375     6.500  $ 1,795.06      360   1-May-29    $    259,900.00
7652649   WILLITS                    CA     95490  SFD          7.750     6.500  $ 2,020.28      360   1-May-29    $    282,000.00
7653101   LAS VEGAS                  NV     89128  SFD          7.375     6.500  $ 3,460.28      360   1-Apr-29    $    500,618.78
7654221   PORTLAND                   OR     97229  PUD          7.000     6.500  $ 2,155.58      360   1-May-29    $    324,000.00
7654230   OAKTON                     VA     22124  PUD          6.750     6.483  $ 1,797.59      360   1-May-29    $    277,150.00
7654645   HOUSTON                    TX     77006  SFD          7.125     6.500  $ 3,368.59      360   1-Apr-29    $    499,600.16
7655486   SAN JOSE                   CA     95130  SFD          7.625     6.500  $ 2,264.94      360   1-Apr-29    $    319,768.39
7656944   RANCHO CUCAMONGA           CA     91701  SFD          7.125     6.500  $ 1,145.32      360   1-Apr-29    $    169,864.06
7658370   LAKE FOREST                CA     92630  SFD          7.000     6.500  $ 1,751.08      360   1-Apr-29    $    262,984.25
7659192   WASHINGTON                 DC     20002  SFD          7.375     6.500  $ 1,738.77      360   1-May-29    $    251,750.00
7659742   SAN JOSE                   CA     95123  SFD          7.500     6.500  $ 1,843.48      360   1-May-29    $    263,650.00
7660747   SAN FRANCISCO              CA     94103  LCO          7.500     6.500  $ 2,433.27      360   1-May-29    $    348,000.00
7660901   SAN JOSE                   CA     95126  PUD          7.000     6.500  $ 2,294.63      360   1-May-29    $    344,900.00
7662354   SAN JOSE                   CA     95129  SFD          6.875     6.500  $ 1,740.86      360   1-May-29    $    265,000.00
7662567   MAMMOTH LAKES              CA     93546  SFD          7.250     6.500  $ 2,564.98      360   1-Apr-29    $    375,706.69
7662907   TEMECULA                   CA     92591  SFD          7.375     6.500  $ 4,365.07      360   1-May-29    $    632,000.00
7663342   RANCHO CUCAMONGA           CA     91739  SFD          7.250     6.500  $ 1,696.22      360   1-May-29    $    248,649.00
7663405   DUNSTABLE                  MA     01827  SFD          8.000     6.500  $ 2,167.91      360   1-May-29    $    295,450.00
7663502   PARK CITY                  UT     84060  SFD          7.000     6.500  $ 2,821.88      360   1-Apr-29    $    423,802.33
7664855   VIRGINIA BEACH             VA     23451  SFD          7.250     6.500  $ 1,846.99      360   1-Apr-29    $    270,538.79
7664926   SAN DIEGO                  CA     92130  PUD          7.000     6.500  $ 2,529.81      360   1-Apr-29    $    379,938.31
7664940   EL CAJON                   CA     92019  SFD          7.625     6.500  $ 1,769.48      360   1-May-29    $    248,317.71
7665187   LOS ANGELES                CA     91304  SFD          7.500     6.500  $ 2,187.14      360   1-May-29    $    312,800.00
7665781   DEL MAR                    CA     92014  LCO          7.375     6.500  $ 3,626.04      360   1-May-29    $    525,000.00
7666137   PRINCEVILLE                HI     96722  SFD          7.125     6.500  $ 4,193.90      360   1-May-29    $    622,500.00
7666362   FOLSOM                     CA     95630  SFD          7.000     6.500  $ 2,315.25      360   1-May-29    $    348,000.00
7667002   MINNEAPOLIS                MN     55403  SFD          7.250     6.500  $ 1,735.46      360   1-May-29    $    254,400.00
7667912   LA MESA                    CA     91941  SFD          7.500     6.500  $ 3,104.51      360   1-Apr-29    $    443,670.49
7668808   LIBERTYVILLE               IL     60048  SFD          7.000     6.500  $ 2,694.48      360   1-May-29    $    405,000.00
7668880   BASALT                     CO     81621  SFD          7.250     6.500  $ 2,684.36      360   1-Apr-29    $    393,193.04
7669553   ANAHEIM                    CA     92807  SFD          7.250     6.500  $ 3,069.79      360   1-Apr-29    $    449,648.96
7670068   POWAY                      CA     92064  SFD          7.000     6.500  $ 3,426.31      360   1-Apr-29    $    514,577.86
7670246   NEWTON                     MA     02459  SFD          7.375     6.500  $ 3,702.02      360   1-May-29    $    536,000.00
7670611   SAN JOSE                   CA     95118  SFD          7.500     6.500  $ 1,872.50      360   1-May-29    $    267,800.00
7672173   BYRON                      CA     94514  SFD          7.250     6.500  $ 1,773.66      360   1-May-29    $    260,000.00
7672227   FORT COLLINS               CO     80525  SFD          7.000     6.500  $ 2,661.21      360   1-May-29    $    400,000.00
7672491   ELK GROVE                  CA     95758  SFD          7.500     6.500  $ 2,097.64      360   1-Apr-29    $    299,776.35
7672743   LAFAYETTE                  CA     94549  SFD          7.375     6.500  $ 2,306.85      360   1-Apr-29    $    333,745.86
7673403   PARK CITY                  UT     84060  LCO          7.250     6.500  $ 2,455.83      360   1-Apr-29    $    359,719.17
7674057   WALNUT CREEK               CA     94596  SFD          7.000     6.500  $ 1,696.52      360   1-May-29    $    255,000.00
7674612   GLENDORA                   CA     91741  SFD          7.500     6.500  $ 1,706.08      360   1-Apr-29    $    243,818.92
7675075   LAGUNA HILLS               CA     92653  SFD          7.250     6.500  $ 2,728.71      360   1-May-29    $    400,000.00
7675195   LAKESIDE PARK              KY     41017  SFD          7.250     6.500  $ 2,360.33      360   1-Apr-29    $    345,730.09
7676125   HIGHLANDS RANCH            CO     80126  SFD          7.250     6.500  $ 1,800.95      360   1-May-29    $    264,000.00
7676569   SAN JOSE                   CA     95128  SFD          7.125     6.500  $ 2,075.05      360   1-May-29    $    308,000.00
7677332   NORTH OAKS                 MN     55127  SFD          7.125     6.500  $ 1,759.55      360   1-May-29    $    261,170.00
7677796   SAN JOSE                   CA     95120  SFD          7.250     6.500  $ 2,865.14      360   1-May-29    $    420,000.00
7677932   SAN DIEGO                  CA     92130  SFD          6.875     6.500  $ 3,118.77      360   1-May-29    $    474,750.00
7678227   OCEAN CITY                 NJ     08226  LCO          7.500     6.500  $ 2,618.56      360   1-Apr-29    $    374,222.07
7678300   ENCINITAS                  CA     92024  SFD          7.250     6.500  $ 1,918.62      360   1-May-29    $    281,250.00
7678557   MIDDLETOWN                 NJ     07748  SFD          7.500     6.500  $ 2,372.43      360   1-May-29    $    339,300.00
7680524   PASADENA                   CA     91106  SFD          7.250     6.500  $ 3,479.10      360   1-May-29    $    510,000.00
7681424   CHARLOTTE                  NC     28277  SFD          7.000     6.500  $ 1,729.79      360   1-May-29    $    260,000.00
7682626   SAUSALITO                  CA     94965  SFD          7.375     6.500  $ 2,196.35      360   1-May-29    $    318,000.00
7682786   CHULA VISTA                CA     91915  SFD          7.250     6.500  $ 1,778.43      360   1-May-29    $    260,700.00
7683093   ANAHEIM                    CA     92808  SFD          6.875     6.500  $ 1,839.40      360   1-May-29    $    280,000.00
7683561   ORANGE                     CA     92867  SFD          6.750     6.483  $ 1,757.70      360   1-Apr-29    $    270,766.68
7683867   FORT LEE                   NJ     07024  HCO          7.625     6.500  $ 1,787.18      360   1-May-29    $    252,500.00
7684885   SNOWMASS VILLAGE           CO     81615  LCO          7.375     6.500  $ 2,296.49      360   1-May-29    $    332,500.00
7685312   MCMINNVILLE                OR     97128  SFD          7.250     6.500  $ 2,030.84      360   1-May-29    $    297,700.00
7685379   OAKLAND                    CA     94602  SFD          7.250     6.500  $ 1,762.74      360   1-May-29    $    258,400.00
7685459   SEATTLE                    WA     98112  SFD          6.875     6.500  $ 2,299.25      360   1-May-29    $    350,000.00
7685521   ALAMO                      CA     94507  SFD          7.250     6.500  $ 3,301.73      360   1-Apr-29    $    483,622.44
7685758   LITTLETON                  CO     80123  SFD          7.250     6.500  $ 1,794.12      360   1-May-29    $    263,000.00
7686093   MCHENRY                    MD     21541  SFD          7.250     6.500  $ 1,940.11      360   1-Apr-29    $    284,178.14
7686429   SAN JUAN CAPISTRA          CA     92675  SFD          7.000     6.500  $ 3,792.22      360   1-May-29    $    570,000.00
7686848   MONMOUTH                   NJ     07750  SFD          6.625     6.358  $ 2,021.46      360   1-May-29    $    315,700.00
7686932   PLEASANT HILL              CA     94523  PUD          7.000     6.500  $ 1,751.41      360   1-May-29    $    263,250.00
7687109   CANTON                     MA     02021  SFD          7.375     6.500  $ 3,305.18      360   1-May-29    $    478,543.00
7687288   SNOWMASS                   CO     81654  SFD          7.250     6.500  $ 1,739.55      360   1-May-29    $    255,000.00
7687653   PARK CITY                  UT     84060  SFD          7.500     6.500  $ 3,188.42      360   1-May-29    $    456,000.00
7687947   SAN DIEGO                  CA     92109  SFD          7.375     6.500  $ 1,809.57      360   1-May-29    $    262,000.00
7688036   LOMITA                     CA     90717  SFD          7.250     6.500  $ 2,285.29      360   1-May-29    $    335,000.00
7688201   INDIANAPOLIS               IN     46256  SFD          7.500     6.500  $ 2,377.33      360   1-May-29    $    340,000.00
7688429   POTOMAC                    MD     20854  SFD          7.125     6.500  $ 3,301.22      360   1-Apr-29    $    489,608.16
7688651   SUNDANCE                   UT     84604  LCO          7.250     6.500  $ 1,364.35      360   1-May-29    $    200,000.00
7689837   PARADISE VALLEY            AZ     85253  SFD          7.375     6.500  $ 3,910.95      360   1-May-29    $    566,250.00
7692000   MIDWAY                     UT     84049  SFD          7.125     6.500  $ 2,021.16      360   1-May-29    $    300,000.00
7692088   TUXEDO                     NY     10987  SFD          7.250     6.500  $ 2,646.84      360   1-Apr-29    $    387,697.33
7693377   FRESNO                     CA     93720  PUD          7.375     6.500  $ 2,072.03      360   1-May-29    $    300,000.00
7693758   MANHATTAN BEACH            CA     90266  SFD          7.500     6.500  $ 6,992.15      360   1-Apr-29    $    999,257.85
7696268   GOLDEN                     CO     80401  SFD          7.375     6.500  $ 1,823.38      360   1-May-29    $    264,000.00
7696727   FAIRFAX STATION            VA     22039  SFD          6.500     6.233  $ 2,275.44      360   1-May-29    $    360,000.00
7697333   BASALT                     CO     81621  SFD          7.375     6.500  $ 2,201.53      360   1-May-29    $    318,750.00
7698322   ENUMCLAW                   WA     98022  SFD          7.250     6.500  $ 1,780.14      360   1-May-29    $    260,950.00
7700422   PITTSBURGH                 PA     15217  SFD          7.250     6.500  $ 1,944.20      360   1-May-29    $    285,000.00
7700642   ORINDA                     CA     94563  SFD          7.000     6.500  $ 2,860.80      360   1-Apr-29    $    429,647.53
7701692   PARK CITY                  UT     84060  SFD          7.500     6.500  $ 2,461.24      360   1-May-29    $    352,000.00
7705253   CHICAGO                    IL     60646  SFD          7.000     6.500  $ 2,474.93      360   1-May-29    $    372,000.00
7706565   ALISO VIEJO                CA     92565  LCO          7.500     6.500  $ 1,716.57      360   1-May-29    $    245,500.00
7708843   PRESCOTT                   AZ     86303  SFD          7.375     6.500  $ 3,784.90      360   1-May-29    $    548,000.00
7709809   CAMPBELL                   CA     95008  SFD          6.875     6.500  $ 1,734.29      360   1-May-29    $    264,000.00
7711001   SAN FRANCISCO              CA     94117  SFD          7.125     6.500  $ 2,802.67      360   1-May-29    $    416,000.00
7711082   PLEASANT GROVE             UT     84062  SFD          7.500     6.500  $   513.92      360   1-May-29    $     73,500.00
7711408   SOLANA BEACH               CA     92075  SFD          7.125     6.500  $ 2,526.44      360   1-May-29    $    375,000.00
7712371   ALPHARETTA                 GA     30202  SFD          6.875     6.500  $ 2,299.25      360   1-May-29    $    350,000.00
7715861   MERCER ISLAND              WA     98040  SFD          7.125     6.500  $ 2,290.64      360   1-May-29    $    340,000.00
7719935   SAN JOSE                   CA     95125  SFD          7.125     6.500  $ 2,054.84      360   1-May-29    $    305,000.00
7720908   LOS ANGELES                CA     91602  SFD          7.375     6.500  $ 2,072.03      360   1-May-29    $    300,000.00
7724459   GOLDEN VALLEY              MN     55422  SFD          7.000     6.500  $ 1,809.62      360   1-May-29    $    272,000.00
7726305   LA CRESCENTA               CA     91214  SFD          7.750     6.500  $   913.71      360   1-May-29    $    127,540.00



<CAPTION>
(i)       (x)     (xi)       (xii)       (xiii)    (xiv)        (xv)        (xvi)
- --------  ------  ---------  ----------  --------  -----------  ----------  -----------

MORTGAGE                     MORTGAGE              T.O.P.       MASTER      FIXED
LOAN                         INSURANCE   SERVICE   MORTGAGE     SERVICE     RETAINED
NUMBER    LTV     SUBSIDY    CODE        FEE       LOAN         FEE         YIELD
- --------  ------  ---------  ----------  --------  -----------  ----------  -----------
<S>       <C>     <C>        <C>         <C>       <C>          <C>         <C>
4699654   80.00                           0.250                   0.017       0.608
4716112   80.00                           0.250                   0.017       0.608
4765675   71.43                           0.250                   0.017       0.983
4818663   77.91                           0.250                   0.017       0.000
4826828   93.20                    17     0.250                   0.017       0.358
4826909   79.76                           0.250                   0.017       0.000
4830823   90.00                    13     0.250                   0.017       0.608
4839938   79.99                           0.250                   0.017       0.483
4862615   75.00                           0.250                   0.017       0.483
4865850   68.42                           0.250                   0.017       0.483
4879708   79.78                           0.250                   0.017       0.858
4883014   81.29                    11     0.250                   0.017       0.608
4889278   54.05                           0.250                   0.017       0.233
4891309   75.00                           0.250                   0.017       0.483
4902152   66.41                           0.250                   0.017       0.358
4911891   88.47                    01     0.250                   0.017       0.483
4914886   65.98                           0.250                   0.017       0.233
4926758   90.00                           0.250                   0.017       0.608
4930049   70.07                           0.250                   0.017       0.233
4931751   77.87                           0.250                   0.017       0.983
4941578   38.46                           0.250                   0.017       0.483
4945298   75.00                           0.250                   0.017       0.108
4946637   75.06                           0.250                   0.017       0.858
4947865   84.11                    01     0.250                   0.017       0.733
4951209   80.00                           0.250                   0.017       0.233
4951252   77.45                           0.250                   0.017       0.483
4951614   95.00                    13     0.250                   0.017       0.483
4952543   80.00                           0.250                   0.017       0.233
4954882   79.97                           0.250                   0.017       0.483
4956347   36.11                           0.250                   0.017       0.358
4956630   63.18                           0.250                   0.017       0.358
4958805   90.00                    06     0.250                   0.017       0.108
4958960   80.00                           0.250                   0.017       0.358
4959853   68.18                           0.250                   0.017       0.608
4960261   52.70                           0.250                   0.017       0.000
4961404   90.00                    13     0.250                   0.017       0.358
4962294   76.27                           0.250                   0.017       0.608
4962753   66.07                           0.250                   0.017       0.000
4962772   60.00                           0.250                   0.017       0.000
4962920   80.00                           0.250                   0.017       0.608
4964716   79.98                           0.250                   0.017       0.108
4965057   74.93                           0.250                   0.017       0.608
4965176   43.85                           0.250                   0.017       0.000
4966864   94.88                    06     0.250                   0.017       0.233
4969754   75.00                           0.250                   0.017       0.000
4969995   89.69                    33     0.250                   0.017       0.608
4971043   57.14                           0.250                   0.017       0.108
4971379   62.77                           0.250                   0.017       0.000
4971757   74.42                           0.250                   0.017       0.483
4972111   87.82                    17     0.250                   0.017       0.108
4972456   84.98                    06     0.250                   0.017       0.233
4972460   79.99                           0.250                   0.017       0.358
4972571   79.44                           0.250                   0.017       0.358
4973297   61.48                           0.250                   0.017       0.483
4973570   87.30                    06     0.250                   0.017       0.608
4973794   80.00                           0.250                   0.017       0.358
4974162   72.63                           0.250                   0.017       0.233
4974292   76.73                           0.250                   0.017       0.233
4974421   70.00                           0.250                   0.017       0.108
4974446   88.34                    17     0.250                   0.017       0.108
4975081   72.07                           0.250                   0.017       0.233
4975752   74.12                           0.250                   0.017       0.358
4976212   90.00                    01     0.250                   0.017       0.000
4976217   63.81                           0.250                   0.017       0.358
4976264   69.41                           0.250                   0.017       0.483
4976354   67.25                           0.250                   0.017       0.233
4978528   68.97                           0.250                   0.017       0.483
4978826   73.43                           0.250                   0.017       0.233
4979176   42.25                           0.250                   0.017       0.983
4980418   80.00                           0.250                   0.017       0.000
4980589   75.00                           0.250                   0.017       0.608
4981144   73.64                           0.250                   0.017       0.858
4982108   80.00                           0.250                   0.017       0.358
4982310   80.00                           0.250                   0.017       0.483
4982519   87.81                    06     0.250                   0.017       0.733
4982626   75.00                           0.250                   0.017       0.233
4982663   35.60                           0.250                   0.017       0.358
4982667   85.00                    17     0.250                   0.017       0.000
4982730   76.69                           0.250                   0.017       0.358
4982800   59.34                           0.250                   0.017       0.000
4982814   68.75                           0.250                   0.017       0.108
4982950   53.96                           0.250                   0.017       0.000
4982958   70.00                           0.250                   0.017       0.608
4983192   50.48                           0.250                   0.017       0.000
4983347   75.00                           0.250                   0.017       0.358
4983855   48.41                           0.250                   0.017       0.000
4983877   95.00                    11     0.250                   0.017       0.483
4984058   49.60                           0.250                   0.017       0.608
4984215   89.38                    24     0.250                   0.017       0.000
4984343   55.56                           0.250                   0.017       0.108
4984599   73.29                           0.250                   0.017       0.358
4984627   64.52                           0.250                   0.017       0.358
4985052   90.00                    01     0.250                   0.017       0.483
4985145   80.00                           0.250                   0.017       0.233
4985333   90.00                    17     0.250                   0.017       0.000
4985471   75.00                           0.250                   0.017       0.733
4985557   72.08   GD 4YR                  0.250                   0.017       0.358
4985916   75.00                           0.250                   0.017       0.733
4986007   80.00                           0.250                   0.017       0.733
4986463   76.92                           0.250                   0.017       0.358
4986606   47.56                           0.250                   0.017       0.608
4986827   70.00                           0.250                   0.017       0.108
4986877   52.00                           0.250                   0.017       0.000
4986937   31.25                           0.250                   0.017       0.233
4987050   75.63                           0.250                   0.017       0.233
4987192   59.30                           0.250                   0.017       0.358
4987199   67.48                           0.250                   0.017       0.000
4987429   87.66                    06     0.250                   0.017       0.858
4987569   61.35                           0.250                   0.017       0.233
4987659   90.00                    33     0.250                   0.017       1.108
4987692   73.70                           0.250                   0.017       0.608
4987969   80.39                    11     0.250                   0.017       0.233
4988033   72.53                           0.250                   0.017       0.233
4988050   74.96                           0.250                   0.017       0.108
4988120   74.34                           0.250                   0.017       0.000
4988347   80.00                           0.250                   0.017       0.108
4988396   80.00                           0.250                   0.017       0.233
4988461   54.88                           0.250                   0.017       0.483
4988503   73.04                           0.250                   0.017       0.233
4988618   52.67                           0.250                   0.017       0.233
4988778   80.00                           0.250                   0.017       0.608
4989023   70.00                           0.250                   0.017       0.483
4989283   53.91                           0.250                   0.017       0.483
4989682   58.92                           0.250                   0.017       0.000
4989920   80.00                           0.250                   0.017       0.233
4990006   80.00                           0.250                   0.017       0.608
4990766   43.75                           0.250                   0.017       0.000
4991129   75.00                           0.250                   0.017       0.733
4991164   80.00                           0.250                   0.017       0.000
4991221   90.00                    13     0.250                   0.017       0.608
4991227   80.00                           0.250                   0.017       0.733
4991309   72.92                           0.250                   0.017       0.233
4991606   70.82                           0.250                   0.017       0.733
4991631   77.44                           0.250                   0.017       0.483
4991787   77.28                           0.250                   0.017       0.358
4991930   80.00                           0.250                   0.017       0.983
4992096   80.00                           0.250                   0.017       0.358
4992302   68.27                           0.250                   0.017       1.108
4993397   84.99                    24     0.250                   0.017       0.733
4993400   68.97                           0.250                   0.017       0.483
4993872   57.65                           0.250                   0.017       0.233
4994122   78.65                           0.250                   0.017       0.608
4994152   84.63                    33     0.250                   0.017       0.483
4994159   80.00                           0.250                   0.017       0.608
4994602   79.80                           0.250                   0.017       0.233
4994717   51.14                           0.250                   0.017       0.483
4994740   80.00                           0.250                   0.017       0.483
4994842   80.00                           0.250                   0.017       0.358
4995194   90.00                    13     0.250                   0.017       0.108
4995617   61.37                           0.250                   0.017       0.358
4995735   60.00                           0.250                   0.017       0.358
4995800   45.14                           0.250                   0.017       0.108
4995989   61.50                           0.250                   0.017       0.483
4996274   75.00                           0.250                   0.017       0.000
4996320   62.35                           0.250                   0.017       0.608
4996418   71.69                           0.250                   0.017       0.108
4996516   80.00                           0.250                   0.017       0.233
4996776   87.50                    12     0.250                   0.017       0.483
4996786   80.00                           0.250                   0.017       0.733
4996842   70.96                           0.250                   0.017       0.233
4996895   73.97                           0.250                   0.017       0.233
4996914   74.98                           0.250                   0.017       0.358
4996942   79.97                           0.250                   0.017       0.358
4996976   90.00                    01     0.250                   0.017       0.483
4997019   81.97                    06     0.250                   0.017       0.983
4997057   75.34                           0.250                   0.017       0.483
4997111   69.47                           0.250                   0.017       0.483
4997162   71.25                           0.250                   0.017       0.108
4997225   79.29                           0.250                   0.017       0.108
4997867   79.09                           0.250                   0.017       0.608
4997973   52.05                           0.250                   0.017       0.483
4998052   75.00                           0.250                   0.017       0.483
4998168   64.63                           0.250                   0.017       0.608
4998309   54.69                           0.250                   0.017       0.483
4998468   69.85                           0.250                   0.017       0.858
4998493   79.98                           0.250                   0.017       0.000
4998604   67.06                           0.250                   0.017       0.233
4998632   78.48                           0.250                   0.017       0.483
4998749   80.00                           0.250                   0.017       0.608
4998953   37.50                           0.250                   0.017       0.000
4999331   89.99                    12     0.250                   0.017       0.483
4999464   80.00                           0.250                   0.017       0.733
5000142   72.16                           0.250                   0.017       0.000
5000435   80.00                           0.250                   0.017       0.000
5000449   79.41                           0.250                   0.017       0.858
5000457   71.83                           0.250                   0.017       0.733
5000494   56.38                           0.250                   0.017       0.483
5000582   63.33                           0.250                   0.017       0.000
5000717   64.99                           0.250                   0.017       0.733
5001015   80.00                           0.250                   0.017       0.233
5001025   64.40                           0.250                   0.017       0.608
5001093   80.00                           0.250                   0.017       0.108
5001140   75.51                           0.250                   0.017       0.608
5001147   74.00                           0.250                   0.017       0.608
5001166   76.46                           0.250                   0.017       0.608
5001242   75.00                           0.250                   0.017       0.608
5001274   80.00                           0.250                   0.017       0.608
5001430   67.25                           0.250                   0.017       0.608
5001505   76.47                           0.250                   0.017       0.358
5001510   80.00                           0.250                   0.017       0.233
5001566   58.68                           0.250                   0.017       0.483
5001587   80.00                           0.250                   0.017       0.233
5001711   80.00                           0.250                   0.017       0.000
5001717   72.73                           0.250                   0.017       0.233
5001861   80.00                           0.250                   0.017       0.983
5001980   79.99                           0.250                   0.017       0.233
5002018   80.00                           0.250                   0.017       0.233
5002020   68.97                           0.250                   0.017       0.233
5002084   67.47                           0.250                   0.017       0.233
5002202   34.47                           0.250                   0.017       0.608
5002451   70.00                           0.250                   0.017       0.358
5002539   74.94                           0.250                   0.017       0.000
5002545   65.49                           0.250                   0.017       0.233
5002665   50.00                           0.250                   0.017       0.000
5002710   40.41                           0.250                   0.017       0.733
5002740   90.00                    01     0.250                   0.017       0.608
5002760   70.00                           0.250                   0.017       0.983
5002788   45.63                           0.250                   0.017       0.483
5002807   80.00                           0.250                   0.017       0.233
5002899   70.00                           0.250                   0.017       0.358
5003147   55.17                           0.250                   0.017       0.108
5003156   74.00                           0.250                   0.017       0.608
5003198   70.00                           0.250                   0.017       0.483
5003392   80.00                           0.250                   0.017       0.733
5003601   80.00                           0.250                   0.017       0.483
5003806   47.89                           0.250                   0.017       0.483
5003918   66.03                           0.250                   0.017       0.000
5004035   70.00                           0.250                   0.017       0.000
5004042   63.53                           0.250                   0.017       0.483
5004138   40.00                           0.250                   0.017       0.358
5004185   65.00                           0.250                   0.017       0.483
5004197   79.67                           0.250                   0.017       0.483
5004270   53.67                           0.250                   0.017       0.000
5004350   79.84                           0.250                   0.017       0.608
5004363   78.48                           0.250                   0.017       0.858
5004370   57.35                           0.250                   0.017       0.358
5004401   52.17                           0.250                   0.017       0.358
5004423   79.96                           0.250                   0.017       0.233
5004427   67.78                           0.250                   0.017       0.983
5004529   66.94                           0.250                   0.017       0.733
5004549   30.94                           0.250                   0.017       0.108
5004604   70.45                           0.250                   0.017       0.483
5004812   61.91                           0.250                   0.017       0.983
5004854   90.00                    33     0.250                   0.017       0.233
5004870   75.00                           0.250                   0.017       0.233
5004896   58.14                           0.250                   0.017       1.108
5004909   68.25                           0.250                   0.017       1.108
5005062   80.00                           0.250                   0.017       0.358
5005171   72.29                           0.250                   0.017       0.608
5005238   77.58                           0.250                   0.017       0.000
5005289   63.03                           0.250                   0.017       0.608
5005305   89.99                    17     0.250                   0.017       0.733
5005362   52.73                           0.250                   0.017       0.358
5005369   75.62                           0.250                   0.017       0.608
5005370   80.00                           0.250                   0.017       0.483
5005383   65.65                           0.250                   0.017       0.983
5005405   90.00                    06     0.250                   0.017       0.858
5005439   72.04                           0.250                   0.017       0.608
5005444   62.50                           0.250                   0.017       1.108
5005452   74.62                           0.250                   0.017       1.108
5005460   56.60                           0.250                   0.017       0.858
5005478   67.00                           0.250                   0.017       0.608
5005842   48.67                           0.250                   0.017       0.733
5005904   50.00                           0.250                   0.017       0.358
5006095   90.00                    06     0.250                   0.017       0.358
5006096   70.99                           0.250                   0.017       0.733
5006345   69.61                           0.250                   0.017       0.483
5006517   80.00                           0.250                   0.017       0.483
5006522   80.00                           0.250                   0.017       0.608
5006829   57.36                           0.250                   0.017       0.233
5007001   80.00                           0.250                   0.017       0.108
5007188   49.75                           0.250                   0.017       0.000
5007319   76.80                           0.250                   0.017       0.608
5007358   72.73                           0.250                   0.017       0.108
5007396   80.00                           0.250                   0.017       0.483
5007397   58.00                           0.250                   0.017       0.233
5007404   80.00                           0.250                   0.017       0.358
5007473   66.82                           0.250                   0.017       0.983
5007533   66.59                           0.250                   0.017       0.233
5007553   80.00                           0.250                   0.017       0.483
5007599   73.97                           0.250                   0.017       0.358
5007601   69.89                           0.250                   0.017       0.233
5007928   80.00                           0.250                   0.017       1.108
5008016   80.00                           0.250                   0.017       0.608
5008017   78.00                           0.250                   0.017       0.483
5008167   80.00                           0.250                   0.017       0.608
5008197   70.00                           0.250                   0.017       0.358
5008278   70.00                           0.250                   0.017       0.733
5008335   58.70                           0.250                   0.017       1.108
5008416   60.83                           0.250                   0.017       0.233
5008472   89.90                    01     0.250                   0.017       0.483
5008514   65.71                           0.250                   0.017       0.483
5008546   67.57                           0.250                   0.017       0.483
5008548   58.51                           0.250                   0.017       0.483
5008638   75.07                           0.250                   0.017       0.483
5008645   63.16                           0.250                   0.017       0.608
5009028   76.08                           0.250                   0.017       0.733
5009157   68.75                           0.250                   0.017       0.483
5009160   69.30                           0.250                   0.017       0.358
5009178   84.12                    06     0.250                   0.017       0.483
5009208   69.66                           0.250                   0.017       0.483
5009312   90.00                    11     0.250                   0.017       0.483
5009916   72.48                           0.250                   0.017       0.858
5010023   79.98                           0.250                   0.017       0.233
5010030   67.80                           0.250                   0.017       0.983
5010060   73.95                           0.250                   0.017       0.233
5010070   71.43                           0.250                   0.017       0.483
5010187   68.89                           0.250                   0.017       0.483
5010247   55.90                           0.250                   0.017       0.983
5010270   68.59                           0.250                   0.017       0.733
5010340   80.00                           0.250                   0.017       0.733
5010397   72.68                           0.250                   0.017       0.000
5010420   70.80                           0.250                   0.017       0.108
5010447   59.15                           0.250                   0.017       0.108
5010472   63.95                           0.250                   0.017       0.233
5010562   46.51                           0.250                   0.017       0.358
5010670   90.00                    01     0.250                   0.017       0.358
5010860   69.98                           0.250                   0.017       0.858
5010910   42.69                           0.250                   0.017       0.483
5010999   77.13                           0.250                   0.017       0.608
5011046   51.55                           0.250                   0.017       0.358
5011247   65.68                           0.250                   0.017       0.608
5011261   55.74                           0.250                   0.017       0.358
5011508   66.86                           0.250                   0.017       0.358
5011678   80.00                           0.250                   0.017       0.483
5011739   89.98                    33     0.250                   0.017       0.983
5012088   80.00                           0.250                   0.017       0.233
5012221   77.76                           0.250                   0.017       0.608
5012327   77.04                           0.250                   0.017       0.608
5012337   53.92                           0.250                   0.017       0.608
5012481   69.95                           0.250                   0.017       0.233
5012614   60.00                           0.250                   0.017       0.233
5012691   67.47                           0.250                   0.017       0.233
5012933   64.94                           0.250                   0.017       0.358
5012980   80.00                           0.250                   0.017       0.858
5012995   80.00                           0.250                   0.017       1.108
5013096   61.89                           0.250                   0.017       0.983
5013262   72.97                           0.250                   0.017       1.108
5013273   65.99                           0.250                   0.017       0.733
5013429   90.00                    01     0.250                   0.017       0.858
5013559   79.99                           0.250                   0.017       0.233
5013599   80.00                           0.250                   0.017       0.233
5013927   74.36                           0.250                   0.017       0.000
5014175   48.35                           0.250                   0.017       1.108
5014428   80.00                           0.250                   0.017       0.358
5014450   79.98                           0.250                   0.017       0.000
5014482   59.11                           0.250                   0.017       0.483
5014654   74.92                           0.250                   0.017       0.858
5014805   61.67                           0.250                   0.017       0.358
5014892   80.00                           0.250                   0.017       0.358
5014893   90.00                    01     0.250                   0.017       0.608
5015070   80.00                           0.250                   0.017       0.108
5015130   74.31                           0.250                   0.017       0.608
5015423   54.91                           0.250                   0.017       0.358
5015574   50.28                           0.250                   0.017       0.108
5015616   50.25                           0.250                   0.017       0.233
5015676   69.53                           0.250                   0.017       0.358
5015713   46.26                           0.250                   0.017       0.483
5015749   75.00                           0.250                   0.017       0.358
5015759   50.88                           0.250                   0.017       0.858
5015798   74.67                           0.250                   0.017       0.483
5015829   39.81                           0.250                   0.017       0.858
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7663342   78.00                           0.250                   0.017       0.483
7663405   95.00                    33     0.250                   0.017       1.233
7663502   85.00                    33     0.250                   0.017       0.233
7664855   95.00                    33     0.250                   0.017       0.483
7664926   79.99                           0.250                   0.017       0.233
7664940   81.97                    24     0.250                   0.017       0.858
7665187   80.00                           0.250                   0.017       0.733
7665781   75.00                           0.250                   0.017       0.608
7666137   75.00                           0.250                   0.017       0.358
7666362   80.00                           0.250                   0.017       0.233
7667002   80.00                           0.250                   0.017       0.483
7667912   80.00                           0.250                   0.017       0.733
7668808   75.14                           0.250                   0.017       0.233
7668880   76.41                           0.250                   0.017       0.483
7669553   75.00                           0.250                   0.017       0.483
7670068   60.59                           0.250                   0.017       0.233
7670246   80.00                           0.250                   0.017       0.608
7670611   79.98                           0.250                   0.017       0.733
7672173   66.67                           0.250                   0.017       0.483
7672227   68.97                           0.250                   0.017       0.233
7672491   94.53                    01     0.250                   0.017       0.733
7672743   69.58                           0.250                   0.017       0.608
7673403   75.00                           0.250                   0.017       0.483
7674057   75.56                           0.250                   0.017       0.233
7674612   78.21                           0.250                   0.017       0.733
7675075   32.00                           0.250                   0.017       0.483
7675195   80.00                           0.250                   0.017       0.483
7676125   80.00                           0.250                   0.017       0.483
7676569   80.00                           0.250                   0.017       0.358
7677332   53.85                           0.250                   0.017       0.358
7677796   80.00                           0.250                   0.017       0.483
7677932   61.28                           0.250                   0.017       0.108
7678227   76.43                           0.250                   0.017       0.733
7678300   75.00                           0.250                   0.017       0.483
7678557   90.00                    01     0.250                   0.017       0.733
7680524   39.23                           0.250                   0.017       0.483
7681424   80.00                           0.250                   0.017       0.233
7682626   65.57                           0.250                   0.017       0.608
7682786   79.99                           0.250                   0.017       0.483
7683093   70.00                           0.250                   0.017       0.108
7683561   69.49                           0.250                   0.017       0.000
7683867   40.40                           0.250                   0.017       0.858
7684885   70.00                           0.250                   0.017       0.608
7685312   68.59                           0.250                   0.017       0.483
7685379   80.00                           0.250                   0.017       0.483
7685459   41.92                           0.250                   0.017       0.108
7685521   75.63                           0.250                   0.017       0.483
7685758   57.80                           0.250                   0.017       0.483
7686093   71.10                           0.250                   0.017       0.483
7686429   69.09                           0.250                   0.017       0.233
7686848   70.00                           0.250                   0.017       0.000
7686932   75.00                           0.250                   0.017       0.233
7687109   80.00                           0.250                   0.017       0.608
7687288   73.91                           0.250                   0.017       0.483
7687653   60.00                           0.250                   0.017       0.733
7687947   66.11                           0.250                   0.017       0.608
7688036   79.76                           0.250                   0.017       0.483
7688201   85.02                    17     0.250                   0.017       0.733
7688429   70.00                           0.250                   0.017       0.358
7688651   48.19                           0.250                   0.017       0.483
7689837   75.00                           0.250                   0.017       0.608
7692000   69.77                           0.250                   0.017       0.358
7692088   79.75                           0.250                   0.017       0.483
7693377   94.94                    17     0.250                   0.017       0.608
7693758   79.68                           0.250                   0.017       0.733
7696268   80.00                           0.250                   0.017       0.608
7696727   80.00                           0.250                   0.017       0.000
7697333   75.00                           0.250                   0.017       0.608
7698322   90.00                    11     0.250                   0.017       0.483
7700422   75.00                           0.250                   0.017       0.483
7700642   52.44                           0.250                   0.017       0.233
7701692   80.00                           0.250                   0.017       0.733
7705253   80.00                           0.250                   0.017       0.233
7706565   94.97                    17     0.250                   0.017       0.733
7708843   80.00                           0.250                   0.017       0.608
7709809   80.00                           0.250                   0.017       0.108
7711001   66.56                           0.250                   0.017       0.358
7711082   70.00                           0.250                   0.017       0.733
7711408   65.22                           0.250                   0.017       0.358
7712371   74.47                           0.250                   0.017       0.108
7715861   71.58                           0.250                   0.017       0.358
7719935   59.22                           0.250                   0.017       0.358
7720908   92.02                    16     0.250                   0.017       0.608
7724459   80.00                           0.250                   0.017       0.233
7726305   70.00                           0.250                   0.017       0.983
</TABLE>



COUNT:               809
WAC:         7.163730639
WAM:         358.8836504
WALTV:       72.34174388


<PAGE>

                                   EXHIBIT F-3

            [Schedule of Mortgage Loans Serviced by Other Servicers]

NASCOR
NMI / 1999-16  Exhibit F-3 (Part A)
30 YEAR FIXED RATE NON RELOCATION LOANS


<TABLE>
<CAPTION>
(i)        (ii)                                   (iii)     (iv)      (v)       (vi)        (vii)     (viii)     (ix)
- --------   -----------------------  -----  -----  --------  --------  --------  ----------  --------  ---------  --------------
                                                                      NET                                        CUT-OFF
MORTGAGE                                                    MORTGAGE  MORTGAGE  CURRENT     ORIGINAL  SCHEDULED  DATE
LOAN                                       ZIP    PROPERTY  INTEREST  INTEREST  MONTHLY     TERM TO   MATURITY   PRINCIPAL
NUMBER     CITY                     STATE  CODE   TYPE      RATE      RATE      PAYMENT     MATURITY  DATE       BALANCE
- --------   -----------------------  -----  -----  --------  --------  --------  ----------  --------  ---------  --------------
<S>        <C>                      <C>    <C>    <C>       <C>       <C>       <C>         <C>       <C>        <C>
4859345    MEDINA                   OH     44256  SFD          7.500     6.500  $2,202.53       360   1-Aug-28   $   312,827.29
4885986    MISSION VIEJO            CA     92692  SFD          7.250     6.500  $2,101.11       360   1-Oct-28   $   306,287.26
4906880    VISTA                    CA     92084  SFD          7.375     6.500  $1,899.36       360   1-Oct-28   $   273,411.68
4943567    HOUSTON                  TX     77024  SFD          6.875     6.500  $5,255.43       360   1-Oct-28   $   795,213.70
4959872    MAITLAND                 FL     32751  SFD          7.625     6.500  $2,374.30       360   1-Mar-28   $   293,930.62
4961092    ATLANTA                  GA     30350  SFD          6.500     6.233  $1,625.42       360   1-Dec-26   $   255,708.42
4972511    ATLANTA                  GA     30327  SFD          6.625     6.358  $4,642.25       360   1-Jan-29   $   722,420.13
4981473    CLAYTON                  CA     94517  SFD          7.250     6.500  $3,274.45       360   1-Jan-29   $   478,488.57
4981853    FREMONT                  CA     94539  SFD          7.000     6.500  $2,328.56       360   1-Jan-29   $   348,842.35
4992496    SUWANEE                  GA     30024  SFD          7.000     6.500  $2,102.36       360   1-Feb-29   $   315,218.37
5000641    FLORENCE                 MA     01060  SFD          7.250     6.500  $2,387.62       360   1-Apr-29   $   349,726.96
5003476    ALBUQUERQUE              NM     87114  SFD          7.000     6.500  $1,676.57       360   1-Mar-29   $   251,585.66
5011166    ENGLEWOOD                FL     34223  SFD          7.375     6.500  $2,762.70       360   1-Apr-29   $   399,695.63
5020436    SALT LAKE CITY           UT     84105  SFD          7.250     6.500  $2,054.98       240   1-May-19   $   260,000.00
5025087    BOGART                   GA     30622  SFD          7.000     6.500  $2,208.80       360   1-Mar-29   $   331,454.15
5025103    POWDER SPRINGS           GA     30127  SFD          7.000     6.500  $2,561.41       360   1-Feb-29   $   383,162.86
5025179    ATLANTA                  GA     30331  PUD          6.875     6.500  $1,767.14       360   1-Apr-29   $   268,774.01
5025197    BIRMINGHAM               AL     35213  SFD          6.875     6.500  $2,516.04       360   1-Nov-28   $   381,041.52
5025220    FRANKLIN                 TN     37064  SFD          6.500     6.233  $3,033.93       360   1-Nov-28   $   477,360.91
5025244    PONTE VEDRA BEACH        FL     32082  SFD          7.000     6.500  $2,228.76       360   1-Feb-29   $   334,171.40
5025302    PALMETTO                 FL     34221  SFD          7.375     6.500  $2,055.62       360   1-Mar-29   $   297,170.67
5025318    NASHVILLE                TN     37221  SFD          6.875     6.500  $2,299.25       360   1-Mar-29   $   349,410.23
5025332    KNOXVILLE                TN     37922  SFD          6.875     6.500  $2,627.72       360   1-Mar-29   $   399,325.97
5025361    LOOKOUT MOUNTAIN         TN     37350  SFD          6.875     6.500  $1,970.79       360   1-Nov-28   $   298,465.93
5025380    ATLANTA                  GA     30306  SFD          6.875     6.500  $2,135.02       360   1-Mar-29   $   324,452.35
5025410    BRENTWOOD                TN     37027  SFD          7.000     6.500  $1,816.28       360   1-Jan-29   $   271,801.63
5025449    TAMPA                    FL     33611  SFD          7.125     6.500  $1,829.15       360   1-Dec-28   $   270,300.25
5025483    BRENTWOOD                TN     37027  SFD          6.625     6.358  $1,536.75       360   1-Feb-29   $   239,361.24
5025488    LEXINGTON                KY     40502  SFD          6.875     6.500  $2,299.25       360   1-Mar-29   $   349,129.09
5026593    CANTON                   GA     30114  SFD          6.750     6.483  $1,725.27       360   1-Oct-28   $   264,369.55

                                                                                                                 $10,603,108.40


<CAPTION>
(i)        (x)     (xi)       (xii)       (xiii)    (xiv)        (xv)         (xvi)
- --------   ------  ---------  ----------  --------  -----------  -----------  -----------

MORTGAGE                      MORTGAGE              T.O.P.       MASTER       FIXED
LOAN                          INSURANCE   SERVICE   MORTGAGE     SERVICE      RETAINED
NUMBER     LTV     SUBSIDY    CODE        FEE       LOAN         FEE          YIELD
- --------   ------  ---------  ----------  --------  -----------  -----------  -----------
<S>        <C>     <C>        <C>         <C>       <C>          <C>          <C>
4859345    90.00                            0.250                  0.017        0.733
4885986    80.00                            0.250                  0.017        0.483
4906880    73.33                            0.250                  0.017        0.608
4943567    64.00                            0.250                  0.017        0.108
4959872    89.99                            0.250                  0.017        0.858
4961092    76.76                            0.250                  0.017        0.000
4972511    55.77                            0.250                  0.017        0.000
4981473    75.00                            0.250                  0.017        0.483
4981853    74.47                    06      0.250                  0.017        0.233
4992496    79.80                    12      0.250                  0.017        0.233
5000641    69.03                            0.250                  0.017        0.483
5003476    75.00                            0.250                  0.017        0.233
5011166    68.38                            0.250                  0.017        0.608
5020436    74.71                            0.250                  0.017        0.483
5025087    80.00                            0.250                  0.017        0.233
5025103    78.25                            0.250                  0.017        0.233
5025179    75.56                            0.250                  0.017        0.108
5025197    75.10                            0.250                  0.017        0.108
5025220    80.00                            0.250                  0.017        0.000
5025244    66.34                            0.250                  0.017        0.233
5025302    68.42                            0.250                  0.017        0.608
5025318    58.33                            0.250                  0.017        0.108
5025332    80.00                            0.250                  0.017        0.108
5025361    70.59                            0.250                  0.017        0.108
5025380    68.19                            0.250                  0.017        0.108
5025410    73.78                            0.250                  0.017        0.233
5025449    75.00                            0.250                  0.017        0.358
5025483    53.47                            0.250                  0.017        0.000
5025488    63.64                            0.250                  0.017        0.108
5026593    77.10                            0.250                  0.017        0.000
</TABLE>



COUNT:               30
WAC:        6.990320394
WAM:        351.3420771
WALTV:      73.66656199

<PAGE>

NASCOR
NMI / 1999-16 Exhibit F-3 (Part B)
30 YEAR FIXED RATE NON RELOCATION  LOANS


(i)       (xvii)                            (xviii)
- --------  --------------------------------  --------------------------------

MORTGAGE                                    NMI
LOAN                                        LOAN
NUMBER    SERVICER                          SELLER
- --------  --------------------------------  --------------------------------
4859345   AMERICA FIRST CREDIT UNION        AMERICA FIRST CREDIT UNION
4885986   BANK UNITED OF TEXAS              BANK UNITED OF TEXAS
4906880   BANK UNITED OF TEXAS              BANK UNITED OF TEXAS
4943567   BANK UNITED OF TEXAS              BANK UNITED OF TEXAS
4959872   BANKNORTH MORTGAGE COMPANY        BANKNORTH MORTGAGE COMPANY
4961092   CHARTER BANK FOR SAVINGS          CHARTER BANK FOR SAVINGS
4972511   COUNTRYWIDE FUNDING CORP.         COUNTRYWIDE FUNDING CORP.
4981473   GMAC MORTGAGE CORP. OF PA         GMAC MORTGAGE CORP. OF PA
4981853   NATIONAL CITY MORTGAGE CO.        NATIONAL CITY MORTGAGE CO.
4992496   SUNTRUST MORTGAGE, INC.           SUNTRUST MORTGAGE, INC.
5000641   SUNTRUST MORTGAGE, INC.           SUNTRUST MORTGAGE, INC.
5003476   SUNTRUST MORTGAGE, INC.           SUNTRUST MORTGAGE, INC.
5011166   SUNTRUST MORTGAGE, INC.           SUNTRUST MORTGAGE, INC.
5020436   SUNTRUST MORTGAGE, INC.           SUNTRUST MORTGAGE, INC.
5025087   SUNTRUST MORTGAGE, INC.           SUNTRUST MORTGAGE, INC.
5025103   SUNTRUST MORTGAGE, INC.           SUNTRUST MORTGAGE, INC.
5025179   SUNTRUST MORTGAGE, INC.           SUNTRUST MORTGAGE, INC.
5025197   SUNTRUST MORTGAGE, INC.           SUNTRUST MORTGAGE, INC.
5025220   SUNTRUST MORTGAGE, INC.           SUNTRUST MORTGAGE, INC.
5025244   SUNTRUST MORTGAGE, INC.           SUNTRUST MORTGAGE, INC.
5025302   SUNTRUST MORTGAGE, INC.           SUNTRUST MORTGAGE, INC.
5025318   SUNTRUST MORTGAGE, INC.           SUNTRUST MORTGAGE, INC.
5025332   SUNTRUST MORTGAGE, INC.           SUNTRUST MORTGAGE, INC.
5025361   SUNTRUST MORTGAGE, INC.           SUNTRUST MORTGAGE, INC.
5025380   SUNTRUST MORTGAGE, INC.           SUNTRUST MORTGAGE, INC.
5025410   SUNTRUST MORTGAGE, INC.           SUNTRUST MORTGAGE, INC.
5025449   SUNTRUST MORTGAGE, INC.           SUNTRUST MORTGAGE, INC.
5025483   SUNTRUST MORTGAGE, INC.           SUNTRUST MORTGAGE, INC.
5025488   SUNTRUST MORTGAGE, INC.           SUNTRUST MORTGAGE, INC.
5026593   SUNTRUST MORTGAGE, INC.           SUNTRUST MORTGAGE, INC.



COUNT:                        30
WAC:                 6.990320394
WAM:                 351.3420771
WALTV:               73.66656199


<PAGE>

                                    EXHIBIT G

                               REQUEST FOR RELEASE

                             (for Trustee/Custodian)

Loan Information
- ----------------

         Name of Mortgagor:             _____________________________

         Servicer
         Loan No.:                      _____________________________

Custodian/Trustee
- -----------------

         Name:                          _____________________________

         Address:                       _____________________________

                                        _____________________________

         Custodian/Trustee
         Mortgage File No.:             _____________________________

Seller
- ------

         Name:                          _____________________________

         Address:                       _____________________________

                                        _____________________________

         Certificates:                  Mortgage Pass-Through Certificates,
                                        Series 1999-16

            The  undersigned  Master Servicer  hereby  acknowledges  that it has
received from First Union  National Bank, as Trustee for the Holders of Mortgage
Pass-Through Certificates,  Series 1999-16, the documents referred to below (the
"Documents").  All capitalized  terms not otherwise  defined in this Request for
Release  shall  have  the  meanings  given  them in the  Pooling  and  Servicing
Agreement dated as of May 28, 1999 (the "Pooling and Servicing Agreement") among
the Trustee, the Seller and the Master Servicer.

( )   Promissory Note dated ______________, 199__, in the original principal sum
      of $___________, made by ____________________,  payable to, or endorsed to
      the order of, the Trustee.


( )   Mortgage   recorded   on    _____________________    as   instrument   No.
      ______________   in  the  County   Recorder's  Office  of  the  County  of
      ____________________, State of _______________________ in book/reel/docket
      ____________________ of official records at page/image ____________.

( )   Deed  of  Trust  recorded  on   ____________________   as  instrument  No.
      _________________  in  the  County  Recorder's  Office  of the  County  of
      ___________________,   State  of   _________________  in  book/reel/docket
      ____________________ of official records at page/image ____________.

( )   Assignment  of  Mortgage  or Deed of Trust  to the  Trustee,  recorded  on
      ______________________________  as instrument  No.  ______________  in the
      County Recorder's Office of the County of ______________________, State of
      _____________________ in book/reel/docket ____________________ of official
      records at page/image ____________.


( )   Other   documents,   including  any   amendments,   assignments  or  other
      assumptions of the Mortgage Note or Mortgage.


( )   ________________________________________________


( )   ________________________________________________


( )   ________________________________________________


( )   ________________________________________________


            The undersigned  Master Servicer hereby  acknowledges  and agrees as
follows:

            (1) The Master  Servicer  shall hold and  retain  possession  of the
      Documents in trust for the benefit of the Trustee, solely for the purposes
      provided in the Agreement.

            (2) The Master  Servicer  shall not cause or permit the Documents to
      become subject to, or encumbered by, any claim, liens,  security interest,
      charges,  writs of  attachment or other  impositions  nor shall the Master
      Servicer  assert  or seek to assert  any  claims or rights of setoff to or
      against the Documents or any proceeds thereof.

            (3) The Master  Servicer  shall return the  Documents to the Trustee
      when the need therefor no longer exists, unless the Mortgage Loan relating
      to the Documents has been  liquidated  and the proceeds  thereof have been
      remitted to the  Certificate  Account and except as expressly  provided in
      the Agreement.

            (4) The Documents and any proceeds  thereof,  including any proceeds
      of proceeds,  coming into the possession or control of the Master Servicer
      shall at all times be earmarked  for the account of the  Trustee,  and the
      Master  Servicer  shall keep the Documents  and any proceeds  separate and
      distinct  from all other  property  in the Master  Servicer's  possession,
      custody or control.

                                    NORWEST BANK MINNESOTA, NATIONAL ASSOCIATION


                                            By:
                                               ---------------------------------

                                            Title:
                                                  ------------------------------

Date: ________________, 19__


<PAGE>


                                    EXHIBIT H

                                            AFFIDAVIT    PURSUANT   TO   SECTION
                                            860E(e)(4)  OF THE INTERNAL  REVENUE
                                            CODE OF 1986,  AS  AMENDED,  AND FOR
                                            NON-ERISA INVESTORS

STATE OF       )
               )   ss.:
COUNTY OF      )

            [NAME OF OFFICER], being first duly sworn, deposes and says:

      (1)  That  he  is  [Title  of  Officer]  of  [Name  of   Purchaser]   (the
"Purchaser"),  a  [description  of type of entity] duly  organized  and existing
under the laws of the [State of_______]  [United States],  on behalf of which he
makes this affidavit.

      (2) That the Purchaser's Taxpayer Identification Number is [ ].

      (3) That the  Purchaser is not a  "disqualified  organization"  within the
meaning of Section  860E(e)(5),of  the Internal Revenue Code of 1986, as amended
(the "Code"),  or an ERISA  Prohibited  Holder,  and will not be a "disqualified
organization" or an ERISA Prohibited Holder, as of [date of transfer],  and that
the Purchaser is not acquiring  Norwest Asset  Securities  Corporation  Mortgage
Pass-Through  Certificates,  Series 1999-16, Class [A-R] [A-LR] Certificate (the
"Class [A-R] [A-LR]  Certificate")  for the account of, or as agent (including a
broker, nominee, or other middleman) for, any person or entity from which it has
not received an affidavit substantially in the form of this affidavit. For these
purposes,  a "disqualified  organization"  means the United States, any state or
political  subdivision  thereof,  any  foreign  government,   any  international
organization,  any agency or instrumentality of any of the foregoing (other than
an instrumentality if all of its activities are subject to tax and a majority of
its  board of  directors  is not  selected  by 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), or
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. For
these purposes,  an "ERISA Prohibited  Holder" means an employee benefit plan or
other  retirement  arrangement  subject  to Title I of the  Employee  Retirement
Income  Security Act of 1974,  as amended  ("ERISA"),  or Code Section 4975 or a
governmental plan, as defined in Section 3(32) of ERISA, subject to any federal,
state or local law which is, to a  material  extent,  similar  to the  foregoing
provisions of ERISA or the Code  (collectively,  a "Plan") or a Person acting on
behalf of or investing the assets of such a Plan.

      (4) That the Purchaser  historically  has paid its debts as they have come
due and  intends  to pay  its  debts  as they  come  due in the  future  and the
Purchaser  intends to pay taxes  associated  with holding the Class [A-R] [A-LR]
Certificate as they become due.

      (5) That the Purchaser  understands that it may incur tax liabilities with
respect to the Class [A-R] [A-LR]  Certificate in excess of cash flows generated
by the Class [A-R] [A-LR] Certificate.

      (6)  That  the  Purchaser   will  not  transfer  the  Class  [A-R]  [A-LR]
Certificate to any person or entity from which the Purchaser has not received an
affidavit  substantially  in the  form of this  affidavit  and as to  which  the
Purchaser has actual knowledge that the requirements set forth in paragraph 3, 4
or 7 hereof are not  satisfied or that the Purchaser has reason to know does not
satisfy the requirements set forth in paragraph 4 hereof.

      (7) That the Purchaser (i) is a U.S. Person or (ii) is a person other than
a  U.S.  Person  (a  "Non-U.S.  Person")  that  holds  the  Class  [A-R]  [A-LR]
Certificate  in  connection  with the conduct of a trade or business  within the
United States and has furnished the transferor and the Trustee with an effective
Internal  Revenue  Service  Form 4224 or  successor  form at the time and in the
manner required by the Code or (iii) is a Non-U.S.  Person that has delivered to
both the  transferor  and the Trustee an opinion of a nationally  recognized tax
counsel to the effect that the transfer of the Class [A-R] [A-LR] Certificate to
it is in  accordance  with the  requirements  of the  Code  and the  regulations
promulgated  thereunder  and  that  such  transfer  of the  Class  [A-R]  [A-LR]
Certificate  will not be  disregarded  for federal  income tax  purposes.  "U.S.
Person"  means a citizen or resident of the United  States,  a  corporation,  or
partnership  (unless,  in the case of a partnership,  Treasury  regulations  are
adopted that provide otherwise) created or organized in or under the laws of the
United States any state thereof or the District of Columbia, including an entity
treated as a corporation  or  partnership  for federal  income tax purposes,  an
estate  whose income is subject to U.S.  federal  income tax  regardless  of its
source  or a trust if a court  within  the  United  States  is able to  exercise
primary  supervision over the administration of such trust, and one or more such
U.S.  Persons have the  authority to control all  substantial  decisions of such
trust (or, to the extent provided in applicable  Treasury  regulations,  certain
trusts in existence on August 20, 1996 which are eligible to elect to be treated
as U.S. Persons).

      (8) That the  Purchaser  agrees  to such  amendments  of the  Pooling  and
Servicing Agreement as may be required to further effectuate the restrictions on
transfer of the Class A-R Certificate to such a "disqualified  organization," an
agent thereof,  an ERISA Prohibited Holder or a person that does not satisfy the
requirements of paragraph 4, paragraph 5 and paragraph 7 hereof.

      (9) That the Purchaser  consents to the designation of the Master Servicer
as  its  agent  to  act as  "tax  matters  person"  of  the  [Upper-Tier  REMIC]
[Lower-Tier  REMIC]  pursuant  to  Section  3.01 of the  Pooling  and  Servicing
Agreement,  and if such  designation is not permitted by the Code and applicable
law, to act as tax matters person if requested to do so.


<PAGE>

            IN WITNESS  WHEREOF,  the Purchaser has caused this instrument to be
executed on its behalf,  pursuant to authority of its Board of Directors, by its
[Title of Officer] this ___ day of__________, 19 __.

                                          [NAME OF PURCHASER]


                                          By:
                                             -----------------------------------
                                             [Name of Officer]
                                             [Title of Officer]

            Personally  appeared  before me the  above-named  [Name of Officer],
known  or  proved  to me to be  the  same  person  who  executed  the  foregoing
instrument and to be the [Title of Officer], of the Purchaser,  and acknowledged
to me that he [she]  executed  the same as his  [her]  free act and deed and the
free act and deed of the Purchaser.

            Subscribed and sworn before me this __ day of__________, 19 __.


- ------------------------------
NOTARY PUBLIC

COUNTY OF ____________________

STATE OF  ____________________

My commission expires the __ day of __________, 19__.


<PAGE>


                                    EXHIBIT I

           [Letter from Transferor of Class [A-R] [A-LR] Certificate]

                                     [Date]

First Union National Bank
230 South Tryon Street
Charlotte, North Carolina 28288

         Re:  Norwest Asset Securities Corporation,
              Series 1999-16, Class [A-R] [A-LR]____

Ladies and Gentlemen:

            [Transferor]  has reviewed the attached  affidavit of  [Transferee],
and has no actual knowledge that such affidavit is not true and has no reason to
know that the information contained in paragraph 4 thereof is not true.

                                                          Very truly yours,


                                                          [Transferor]


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

<PAGE>

                                    EXHIBIT J

                      NORWEST ASSET SECURITIES CORPORATION

                       MORTGAGE PASS-THROUGH CERTIFICATES
                                 SERIES 1999-16
                    CLASS [A-PO][B-4][B-5][B-6] CERTIFICATES

                               TRANSFEREE'S LETTER
                               -------------------

First Union National Bank
230 South Tryon Street
Charlotte, North Carolina 28288

Norwest Asset Securities Corporation
7485 New Horizon Way
Frederick, Maryland 21703

            The undersigned (the "Purchaser") proposes to purchase Norwest Asset
Securities Corporation Mortgage Pass-Through Certificates, Series 1999-16, Class
[A-PO][B-4][B-5][B-6]    Certificates    (the    "Class    [A-PO][B-4][B-5][B-6]
Certificates")  in the  principal  amount  of  $___________.  In doing  so,  the
Purchaser hereby acknowledges and agrees as follows:

            Section 1.  Definitions.  Each  capitalized term used herein and not
otherwise  defined  herein shall have the meaning  ascribed to it in the Pooling
and  Servicing  Agreement,  dated as of  January  28,  1999  (the  "Pooling  and
Servicing Agreement") among Norwest Asset Securities Corporation, as seller (the
"Seller"), Norwest Bank Minnesota, National Association, as master servicer (the
"Master Servicer") and First Union National Bank, as trustee (the "Trustee"), of
Norwest Asset Securities Corporation Mortgage Pass-Through Certificates,  Series
1999-16.

            Section 2.  Representations  and  Warranties  of the  Purchaser.  In
connection with the proposed transfer,  the Purchaser represents and warrants to
the Seller, the Master Servicer and the Trustee that:

            (a) The Purchaser is duly  organized,  validly  existing and in good
standing under the laws of the jurisdiction in which the Purchaser is organized,
is authorized to invest in the Class [A-PO][B-4][B-5][B-6]  Certificates, and to
enter into this Agreement, and duly executed and delivered this Agreement.

            (b) The  Purchaser  is  acquiring  the  Class  [A-PO][B-4][B-5][B-6]
Certificates  for its  own  account  as  principal  and  not  with a view to the
distribution thereof, in whole or in part.

            [(c) The Purchaser  has knowledge of financial and business  matters
and is capable of evaluating  the merits and risks of an investment in the Class
[A-PO][B-4][B-5][B-6]  Certificates;  the Purchaser has sought such  accounting,
legal  and tax  advice  as it has  considered  necessary  to  make  an  informed
investment  decision;  and the Purchaser is able to bear the economic risk of an
investment  in the Class  [A-PO][B-4][B-5][B-6]  Certificates  and can  afford a
complete loss of such investment.]

            [(c) The Purchaser is a "Qualified  Institutional  Buyer" within the
meaning of Rule 144A of the Act.]

            (d) The  Purchaser  confirms that (a) it has received and reviewed a
copy of the Private Placement  Memorandum dated __________ __, 19__, relating to
the Class  [A-PO][B-4][B-5][B-6]  Certificates  and  reviewed,  to the extent it
deemed appropriate,  the documents attached thereto or incorporated by reference
therein, (b) it has had the opportunity to ask questions of, and receive answers
from the Seller concerning the Class [A-PO][B-4][B-5][B-6]  Certificates and all
matters  relating  thereto,  and obtain any  additional  information  (including
documents) relevant to its decision to purchase the Class  [A-PO][B-4][B-5][B-6]
Certificates  that the Seller  possesses  or can  possess  without  unreasonable
effort or expense and (c) it has undertaken its own independent  analysis of the
investment in the Class [A-PO][B-4][B-5][B-6]  Certificates.  The Purchaser will
not use or disclose any  information it receives in connection with its purchase
of the Class [A-PO][B-4][B-5][B-6]  Certificates other than in connection with a
subsequent sale of Class [A-PO][B-4][B-5][B-6] Certificates.

            (e) Either (i) the  Purchaser  is not an  employee  benefit  plan or
other  retirement  arrangement  subject  to Title I of the  Employee  Retirement
Income  Security  Act of 1974,  as amended,  ("ERISA"),  or Section  4975 of the
Internal Revenue Code of 1986, as amended (the "Code"),  or a governmental plan,
as defined in Section 3(32) of ERISA subject to any federal,  state or local law
("Similar  Law")  which is,  to a  material  extent,  similar  to the  foregoing
provisions  of ERISA or the Code  (collectively,  a "Plan"),  an agent acting on
behalf of a Plan, or a person  utilizing the assets of a Plan or (ii) [for Class
[B-4][B-5][B-6] Certificates only] if the Purchaser is an insurance company, (A)
the source of funds used to purchase the Class [B-4][B-5][B-6] Certificate is an
"insurance  company general account" (as such term is defined in Section V(e) of
Prohibited  Transaction Class Exemption 95-60 ("PTE 95-60"),  60 Fed. Reg. 35925
(July 12,  1995),  (B) there is no Plan with respect to which the amount of such
general  account's  reserves and liabilities  for the contract(s)  held by or on
behalf of such Plan and all other  Plans  maintained  by the same  employer  (or
affiliate  thereof as  defined  in Section  V(a)(1) of PTE 95-60) or by the same
employee  organization  exceeds 10% of the total of all reserves and liabilities
of such general  account (as such amounts are  determined  under Section I(a) of
PTE 95-60) at the date of  acquisition  and (C) the purchase and holding of such
Class  [B-4][B-5][B-6]  Certificates  are  covered by  Sections I and III of PTE
95-60  or  (iii)  the  Purchaser  has  provided  (a) a  "Benefit  Plan  Opinion"
satisfactory  to the  Seller and the  Trustee  of the Trust  Estate and (b) such
other opinions of counsel,  officers'  certificates and agreements as the Seller
or the Master  Servicer may have required.  A Benefit Plan Opinion is an opinion
of counsel to the effect that the proposed transfer will not cause the assets of
the Trust Estate to be regarded as "plan  assets" and subject to the  prohibited
transaction  provisions  of ERISA,  the Code or Similar Law and will not subject
the Trustee,  the Seller or the Master Servicer to any obligation in addition to
those undertaken in the Pooling and Servicing Agreement (including any liability
for civil penalties or excise taxes imposed  pursuant to ERISA,  Section 4975 of
the Code or Similar Law).

            (f) If the  Purchaser  is a  depository  institution  subject to the
jurisdiction of the Office of the Comptroller of the Currency ("OCC"), the Board
of  Governors  of the  Federal  Reserve  System  ("FRB"),  the  Federal  Deposit
Insurance Corporation ("FDIC"),  the Office of Thrift Supervision ("OTS") or the
National Credit Union  Administration  ("NCUA"),  the Purchaser has reviewed the
"Supervisory Policy Statement on Securities  Activities" dated April 29, 1992 of
the Federal Financial  Institutions  Examination  Council and the April 15, 1994
Interim  Revision  thereto as adopted by the OCC, FRB,  FDIC, OTS and NCUA (with
modifications  as  applicable),  as  appropriate,  other  applicable  investment
authority,  rules, supervisory policies and guidelines of these agencies and, to
the extent  appropriate,  state banking  authorities  and has concluded that its
purchase  of  the  Class  [A-PO][B-4][B-5][B-6]  Certificates  is in  compliance
therewith.

            Section 3. Transfer of Class [A-PO][B-4][B-5][B-6] Certificates.

            (a) The Purchaser  understands that the Class  [A-PO][B-4][B-5][B-6]
Certificates  have not been  registered  under the  Securities  Act of 1933 (the
"Act") or any state  securities laws and that no transfer may be made unless the
Class  [A-PO][B-4][B-5][B-6]  Certificates  are  registered  under  the  Act and
applicable state law or unless an exemption from registration is available.  The
Purchaser further  understands that neither the Seller,  the Master Servicer nor
the Trustee is under any obligation to register the Class  [A-PO][B-4][B-5][B-6]
Certificates or make an exemption  available.  In the event that such a transfer
is to be made in reliance  upon an exemption  from the Act or  applicable  state
securities  laws, (i) the Trustee shall require,  in order to assure  compliance
with such laws, that the  Certificateholder's  prospective transferee certify to
the  Trustee  as to the  factual  basis for the  registration  or  qualification
exemption   relied  upon,  and  (ii)  unless  the  transferee  is  a  "Qualified
Institutional  Buyer" within the meaning of Rule 144A of the Act, the Trustee or
the Seller  may, if such  transfer is made within  three years from the later of
(a) the Closing  Date or (b) the last date on which the Seller or any  affiliate
thereof was a holder of the Certificates proposed to be transferred,  require an
Opinion of Counsel that such transfer may be made pursuant to an exemption  from
the Act and state  securities  laws,  which  Opinion of Counsel  shall not be an
expense  of  the  Trustee,   the  Master  Servicer  or  the  Seller.   Any  such
Certificateholder  desiring to effect such transfer shall, and does hereby agree
to,  indemnify  the  Trustee,  the Master  Servicer,  any Paying Agent acting on
behalf of the Trustee and the Seller  against any  liability  that may result if
the transfer is not so exempt or is not made in accordance with such federal and
state laws.

            (b) No transfer of a Class  [A-PO][B-4][B-5][B-6]  Certificate shall
be made  unless  the  transferee  provides  the Seller  and the  Trustee  with a
Transferee's Letter, substantially in the form of this Agreement.

            (c) The Purchaser acknowledges that its Class  [A-PO][B-4][B-5][B-6]
Certificates  bear  a  legend  setting  forth  the  applicable  restrictions  on
transfer.


<PAGE>



            IN WITNESS WHEREOF,  the undersigned has caused this Agreement to be
validly  executed by its duly  authorized  representative  as of the day and the
year first above written.

                                              [PURCHASER]


                                              By:
                                                 -------------------------------
                                              Its:
                                                  ------------------------------


<PAGE>

                                    EXHIBIT K

                      NORWEST ASSET SECURITIES CORPORATION

                       MORTGAGE PASS-THROUGH CERTIFICATES
                                 SERIES 1999-16
                   CLASS [A-14] [B-1] [B-2] [B-3] CERTIFICATES

                               TRANSFEREE'S LETTER
                               -------------------

First Union National Bank
230 South Tryon Street
Charlotte, North Carolina 28288

Norwest Asset Securities Corporation
7485 New Horizon Way
Frederick, Maryland 21703

            The undersigned (the "Purchaser") proposes to purchase Norwest Asset
Securities Corporation Mortgage Pass-Through Certificates, Series 1999-16, Class
[A-14]  [B-1] [B-2] [B-3]  Certificates  (the  "Class  [A-14]  [B-1] [B-2] [B-3]
Certificates")  in the  principal  amount  of  $___________.  In doing  so,  the
Purchaser hereby acknowledges and agrees as follows:

            Section 1.  Definitions.  Each  capitalized term used herein and not
otherwise  defined  herein shall have the meaning  ascribed to it in the Pooling
and  Servicing  Agreement,  dated as of May 28, 1999 (the "Pooling and Servicing
Agreement")  among  Norwest  Asset  Securities   Corporation,   as  seller  (the
"Seller"), Norwest Bank Minnesota, National Association, as master servicer (the
"Master  Servicer") and First Union National Bank, as trustee (the "Trustee") of
Norwest Asset Securities Corporation Mortgage Pass-Through Certificates,  Series
1999-16.

            Section 2.  Representations  and  Warranties  of the  Purchaser.  In
connection with the proposed transfer,  the Purchaser represents and warrants to
the Seller, the Master Servicer and the Trustee that:

            Either (i) the  Purchaser  is not an employee  benefit plan or other
retirement  arrangement  subject to Title I of the  Employee  Retirement  Income
Security  Act of 1974,  as amended,  ("ERISA"),  or Section 4975 of the Internal
Revenue Code of 1986,  as amended  (the  "Code"),  or a  governmental  plan,  as
defined in Section  3(32) of ERISA  subject to any  federal,  state or local law
("Similar  Law")  which is,  to a  material  extent,  similar  to the  foregoing
provisions  of ERISA or the Code  (collectively,  a "Plan"),  an agent acting on
behalf  of a Plan,  or a person  utilizing  the  assets of a Plan or (ii) if the
Purchaser is an insurance company,  (A) the source of funds used to purchase the
Class [A-14] [B-1] [B-2] [B-3]  Certificate  is an  "insurance  company  general
account"  (as such term is  defined in Section  V(e) of  Prohibited  Transaction
Class  Exemption  95-60 ("PTE 95-60"),  60 Fed. Reg. 35925 (July 12, 1995),  (B)
there is no Plan with  respect  to which the  amount of such  general  account's
reserves and liabilities  for the contract(s)  held by or on behalf of such Plan
and all other Plans  maintained by the same  employer (or  affiliate  thereof as
defined in Section  V(a)(1) of PTE 95-60) or by the same employee  organization,
exceed 10% of the total of all reserves and  liabilities of such general account
(as such amounts are determined  under Section I(a) of PTE 95-60) at the date of
acquisition   and  (C)  the   purchase   and   holding  of  such  Class   [A-14]
[B-1][B-2][B-3]  Certificate  are  covered by Sections I and III of PTE 95-60 or
(iii) the Purchaser has provided (a) a "Benefit  Plan Opinion"  satisfactory  to
the Seller and the  Trustee of the Trust  Estate and (b) such other  opinions of
counsel,  officers'  certificates  and  agreements  as the  Seller or the Master
Servicer may have  required.  A Benefit Plan Opinion is an opinion of counsel to
the effect  that the  proposed  transfer  will not cause the assets of the Trust
Estate to be regarded as "plan assets" and subject to the prohibited transaction
provisions  of ERISA,  the Code or Similar Law and will not subject the Trustee,
the  Seller or the  Master  Servicer  to any  obligation  in  addition  to those
undertaken in the Pooling and Servicing  Agreement  (including any liability for
civil penalties or excise taxes imposed  pursuant to ERISA,  Section 4975 of the
Code or Similar Law).

            IN WITNESS WHEREOF,  the undersigned has caused this Agreement to be
validly  executed by its duly  authorized  representative  as of the day and the
year first above written.

                                        [PURCHASER]


                                        By:
                                           ---------------------------------
                                        Its:
                                           ---------------------------------

                                        [Reserved]


<PAGE>

                                    EXHIBIT L

                              SERVICING AGREEMENTS

                   Norwest Mortgage, Inc. Servicing Agreement

                   SunTrust Mortgage, Inc. Servicing Agreement

                         Bank United Servicing Agreement

                 BankNorth Mortgage Company Servicing Agreement

               National City Mortgage Company Servicing Agreement

                  GMAC Mortgage Corporation Servicing Agreement

                Countrywide Home Loans, Inc. Servicing Agreement

                 America First Credit Union Servicing Agreement

                Charter Bank for Savings, FSB Servicing Agreement


<PAGE>

                                    EXHIBIT M

                      [FORM OF SPECIAL SERVICING AGREEMENT]

                 SPECIAL SERVICING AND COLLATERAL FUND AGREEMENT

            This  SPECIAL   SERVICING  AND   COLLATERAL   FUND   AGREEMENT  (the
"Agreement")  is made and entered into as of , between  Norwest Bank  Minnesota,
National Association (the "Company" and "Norwest Bank") and (the "Purchaser").

                              PRELIMINARY STATEMENT

___________________________  is the  holder of the  entire  interest  in Norwest
Asset Securities Corporation Mortgage Pass-Through Certificates, Series 1999-16,
Class ____ (the "Class B  Certificates").  The Class B Certificates  were issued
pursuant to a Pooling  and  Servicing  Agreement  dated as of May 28, 1999 among
Norwest Asset  Securities  Corporation,  as seller (the "Seller"),  Norwest Bank
Minnesota,  National  Association,  as Master  Servicer and First Union National
Bank, as Trustee.

___________________________  intends to resell  all of the Class B  Certificates
directly to the Purchaser on or promptly after the date hereof.

            In connection  with such sale,  the parties  hereto have agreed that
the  Company  will cause,  to the extent that the Company as Master  Servicer is
granted  such  authority  in  the  related  Servicing  Agreements,  the  related
servicers  (each a related  "Servicer"),  which service the Mortgage Loans which
comprise  the Trust  Estate  related to the above  referenced  series  under the
related servicing agreements (each a related "Servicing  Agreement"),  to engage
in certain special servicing procedures relating to foreclosures for the benefit
of the Purchaser, and that the Purchaser will deposit funds in a collateral fund
to cover any losses  attributable to such procedures as well as all advances and
costs in connection therewith, as set forth herein.

            In  consideration of the mutual  agreements  herein  contained,  the
receipt and  sufficiency of which are hereby  acknowledged,  the Company and the
Purchaser agree that the following  provisions  shall become effective and shall
be binding on and enforceable by the Company and the Purchaser:

                                    ARTICLE V

                                   DEFINITIONS

            Section 5.01 Defined Terms.

            Whenever used in this  Agreement,  the following  words and phrases,
unless the context otherwise requires, shall have the following meanings:

            Business  Day: Any day other than (i) a Saturday or a Sunday or (ii)
a day on which  banking  institutions  in the State of New York are  required or
authorized by law or executive order to be closed.

            Collateral  Fund: The fund  established  and maintained  pursuant to
Section 3.01 hereof.

            Collateral Fund Permitted Investments: Either (i) obligations of, or
obligations fully guaranteed as to principal and interest by, the United States,
or any agency or instrumentality  thereof,  provided such obligations are backed
by the full faith and  credit of the United  States,  (ii) a money  market  fund
rated in the highest rating  category by a nationally  recognized  rating agency
selected by the Company,  (iii) cash,  (iv) mortgage  pass-through  certificates
issued or guaranteed by Government National Mortgage Association, FNMA or FHLMC,
(v) commercial paper (including both  non-interest-bearing  discount obligations
and interest-bearing  obligations payable on demand or on a specified date), the
issuer of which may be an affiliate  of the Company,  having at the time of such
investment  a  rating  of at  least  P-1  by  Moody's  Investors  Service,  Inc.
("Moody's")  or at least D-1 by Duff & Phelps Credit Rating Co.  ("DCR") or (vi)
demand  and time  deposits  in,  certificates  of  deposit  of,  any  depository
institution  or  trust  company  (which  may be an  affiliate  of  the  Company)
incorporated under the laws of the United States of America or any state thereof
and subject to  supervision  and  examination  by federal  and/or state  banking
authorities,  so long as at the time of such investment either (x) the long-term
debt  obligations of such depository  institution or trust company have a rating
of at least AA by DCR or Aa2 by Moody's, (y) the certificate of deposit or other
unsecured  short-term debt  obligations of such depository  institution or trust
company  have a  rating  of at  least  D-1 by DCR or P-1 by  Moody's  or (z) the
depository  institution or trust company is one that is acceptable to either DCR
or Moody's and, for each of the preceding  clauses (i),  (iv), (v) and (vi), the
maturity  thereof  shall be not later  than the  earlier to occur of (A) 30 days
from the date of the related investment and (B) the next succeeding Distribution
Date as defined in the related Pooling and Servicing Agreement.

            Commencement  of  Foreclosure:  The first official  action  required
under local law in order to commence  foreclosure  proceedings  or to schedule a
trustee's  sale under a deed of trust,  including (i) in the case of a mortgage,
any filing or service of process  necessary to commence an action to  foreclose,
or (ii) in the case of a deed of  trust,  posting,  the  publishing,  filing  or
delivery of a notice of sale, but not including in either case (x) any notice of
default,  notice of intent to foreclose or sell or any other action prerequisite
to  the  actions  specified  in (i) or  (ii)  above,  (y)  the  acceptance  of a
deed-in-lieu  of foreclosure  (whether in connection  with a sale of the related
property or otherwise) or (z) initiation and completion of a short pay-off.

            Current Appraisal: With respect to any Mortgage Loan as to which the
Purchaser has made an Election to Delay Foreclosure, an appraisal of the related
Mortgaged  Property  obtained  by the  Purchaser  at its  own  expense  from  an
independent  appraiser  (which  shall  not be an  affiliate  of  the  Purchaser)
acceptable to the Company as nearly contemporaneously as practicable to the time
of  the  Purchaser's  election,   prepared  based  on  the  Company's  customary
requirements for such appraisals.

            Election to Delay  Foreclosure:  Any  election by the  Purchaser  to
delay the Commencement of Foreclosure, made in accordance with Section 2.02(b).

            Election to Foreclose: Any election by the Purchaser to proceed with
the Commencement of Foreclosure, made in accordance with Section 2.03(a).

            Monthly  Advances:  Principal  and interest  advances and  servicing
advances including costs and expenses of foreclosure.

            Required  Collateral Fund Balance:  As of any date of determination,
an amount  equal to the  aggregate  of all  amounts  previously  required  to be
deposited in the Collateral Fund pursuant to Section  2.02(d) (after  adjustment
for all  withdrawals  and  deposits  pursuant  to Section  2.02(e))  and Section
2.03(b) (after  adjustment for all withdrawals and deposits  pursuant to Section
2.03(c)) and Section 3.02 to be reduced by all withdrawals therefrom pursuant to
Section 2.02(g) and Section 2.03(d).

            Section 5.02 Definitions Incorporated by Reference.

            All capitalized  terms not otherwise defined in this Agreement shall
have the meanings assigned in the Pooling and Servicing Agreement.

                                   ARTICLE VI

                          SPECIAL SERVICING PROCEDURES

            Section 6.01 Reports and Notices.

            (a) In  connection  with the  performance  of its  duties  under the
Pooling and  Servicing  Agreement  relating to the  realization  upon  defaulted
Mortgage  Loans,  the Company as Master  Servicer shall provide to the Purchaser
the following notices and reports:

            (i) Within  five  Business  Days after  each  Distribution  Date (or
      included in or with the monthly statements to Certificateholders  pursuant
      to the Pooling and Servicing Agreement), the Company, shall provide to the
      Purchaser a report,  using the same  methodology  and  calculations in its
      standard servicing reports,  indicating for the Trust Estate the number of
      Mortgage  Loans that are (A) thirty days,  (B) sixty days, (C) ninety days
      or more  delinquent or (D) in  foreclosure,  and  indicating for each such
      Mortgage Loan the loan number and outstanding principal balance.

            (ii) Prior to the Commencement of Foreclosure in connection with any
      Mortgage  Loan, the Company shall cause (to the extent that the Company as
      Master  Servicer  is  granted  such  authority  in the  related  Servicing
      Agreement)  the Servicer to provide the  Purchaser  with a notice (sent by
      telecopier)  of such proposed and imminent  foreclosure,  stating the loan
      number and the aggregate amount owing under the Mortgage Loan. Such notice
      may be  provided  to the  Purchaser  in the  form of a copy of a  referral
      letter from such Servicer to an attorney  requesting  the  institution  of
      foreclosure.

            (b) If  requested  by the  Purchaser,  the  Company  shall cause the
Servicer  (to the extent  that the Company as Master  Servicer  is granted  such
authority in the related  Servicing  Agreement) to make its servicing  personnel
available  (during  their  normal  business  hours)  to  respond  to  reasonable
inquiries,  by phone or in writing by facsimile,  electronic,  or overnight mail
transmission,  by the Purchaser in connection  with any Mortgage Loan identified
in a report under  subsection (a) (i) (B), (a) (i) (C), (a) (i) (D), or (a) (ii)
which has been given to the Purchaser;  provided,  that (1) the related Servicer
shall only be required to provide  information that is readily accessible to its
servicing personnel and is  non-confidential  and (2) the related Servicer shall
respond   within  five   Business   Days  orally  or  in  writing  by  facsimile
transmission.

            (c) In  addition  to the  foregoing,  the  Company  shall  cause the
Servicer  (to the extent  that the Company as Master  Servicer  is granted  such
authority in the related  Servicing  Agreement) to provide to the Purchaser such
information as the Purchaser may reasonably request provided, however, that such
information  is consistent  with normal  reporting  practices,  concerning  each
Mortgage  Loan that is at least ninety days  delinquent  and each  Mortgage Loan
which has become  real estate  owned,  through  the final  liquidation  thereof;
provided,   that  the  related  Servicer  shall  only  be  required  to  provide
information  that  is  readily  accessible  to its  servicing  personnel  and is
non-confidential  provided,  however,  that the  Purchaser  will  reimburse  the
Company and the related Servicer for any out of pocket expenses.

            Section 6.02 Purchaser's Election to Delay Foreclosure Proceedings.

            (a) The  Purchaser  shall be deemed to direct the  Company to direct
(to the extent that the Company as Master  Servicer is granted such authority in
the related Servicing Agreement) the related Servicer that in the event that the
Company does not receive written notice of the Purchaser's  election pursuant to
subsection (b) below within 24 hours (exclusive of any intervening  non-Business
Days) of  transmission  of the notice provided by the Company under Section 2.01
(a) (ii)  subject to  extension  as set forth in Section  2.02(b),  the  related
Servicer may proceed with the  Commencement  of  Foreclosure  in respect of such
Mortgage Loan in accordance with its normal foreclosure policies without further
notice  to the  Purchaser.  Any  foreclosure  that  has  been  initiated  may be
discontinued  (i) without  notice to the Purchaser if the Mortgage Loan has been
brought  current or if a refinancing  or  prepayment  occurs with respect to the
Mortgage  Loan  (including  by means of a short  payoff  approved by the related
Servicer) or (ii) if the related Servicer has reached the terms of a forbearance
agreement  with the  borrower.  In the latter  case,  the related  Servicer  may
complete such forbearance agreement unless instructed otherwise by the Purchaser
within two Business Days notification.

            (b) In  connection  with any  Mortgage  Loan with respect to which a
notice under Section 2.01(a)(ii) has been given to the Purchaser,  the Purchaser
may elect to instruct  the  Company to cause,  to the extent that the Company as
Master  Servicer is granted such authority in the related  Servicing  Agreement,
the related Servicer to delay the Commencement of Foreclosure until such time as
the  Purchaser  determines  that  the  related  Servicer  may  proceed  with the
Commencement of  Foreclosure.  Such election must be evidenced by written notice
received  within 24 hours  (exclusive of any intervening  non-Business  Days) of
transmission  of the notice  provided by the Company under Section  2.01(a)(ii).
Such 24 hour period  shall be extended  for no longer  than an  additional  four
Business Days after the receipt of the  information  if the  Purchaser  requests
additional information related to such foreclosure;  provided, however, that the
Purchaser  will have at least  one  Business  Day to  respond  to any  requested
additional  information.  Any such additional information shall be provided only
to the extent it (i) is not confidential in nature and (ii) is obtainable by the
related  Servicer  from  existing  reports,  certificates  or  statements  or is
otherwise readily  accessible to its servicing  personnel.  The Purchaser agrees
that it has no right to deal with the mortgagor during such period.  However, if
such servicing activities include acceptance of a deed-in-lieu of foreclosure or
short  payoff,  the  Purchaser  will be notified and given two Business  Days to
respond.

            (c) With respect to any Mortgage  Loan as to which the Purchaser has
made an Election to Delay  Foreclosure,  the  Purchaser  shall  obtain a Current
Appraisal  as soon as  practicable,  but in no event more than 15 business  days
thereafter, and shall provide the Company with a copy of such Current Appraisal.

            (d)  Within  two  Business  Days of  making  any  Election  to Delay
Foreclosure,  the  Purchaser  shall remit by wire  transfer to the Company,  for
deposit in the Collateral Fund, an amount,  as calculated by the Company,  equal
to the sum of (i) 125% of the  greater  of the unpaid  principal  balance of the
Mortgage  Loan and the  value  shown in the  Current  Appraisal  referred  to in
subsection  (c) above (or, if such Current  Appraisal has not yet been obtained,
the Company's  estimate  thereof,  in which case the required deposit under this
subsection  shall be adjusted upon obtaining such Current  Appraisal),  and (ii)
three months' interest on the Mortgage Loan at the applicable  Mortgage Interest
Rate.  If any  Election to Delay  Foreclosure  extends for a period in excess of
three  months  (such  excess  period  being  referred  to herein as the  "Excess
Period"), within two Business Days the Purchaser shall remit by wire transfer in
advance to the  Company for  deposit in the  Collateral  Fund the amount of each
additional month's interest, as calculated by the Company,  equal to interest on
the  Mortgage  Loan at the  applicable  Mortgage  Interest  Rate for the  Excess
Period. The terms of this Agreement will no longer apply to the servicing of any
Mortgage  Loan upon the  failure of the  Purchaser  to deposit  any of the above
amounts  relating to the Mortgage  Loan within two Business Days of the Election
to Delay  Foreclosure  or within two Business  Days of the  commencement  of the
Excess Period subject to Section 3.01.

            (e) With respect to any Mortgage  Loan as to which the Purchaser has
made an  Election  to Delay  Foreclosure,  the  Company  may  withdraw  from the
Collateral  Fund from time to time amounts  necessary  to reimburse  the related
Servicer for all related Monthly  Advances and Liquidation  Expenses  thereafter
made by such Servicer in accordance with the Pooling and Servicing Agreement and
the  related  Servicing  Agreement.  To the  extent  that the amount of any such
Liquidation  Expenses is determined by the Company based on estimated costs, and
the actual  costs are  subsequently  determined  to be higher,  the  Company may
withdraw the additional  amount from the Collateral  Fund. In the event that the
Mortgage Loan is brought current by the mortgagor and the foreclosure  action is
discontinued,  the  amounts  so  withdrawn  from the  Collateral  Fund  shall be
redeposited if and to the extent that  reimbursement  therefor from amounts paid
by the  mortgagor  is not  prohibited  pursuant  to the  Pooling  and  Servicing
Agreement  or the related  Servicing  Agreement,  applicable  law or the related
mortgage note. Except as provided in the preceding  sentence,  amounts withdrawn
from the  Collateral  Fund to cover Monthly  Advances and  Liquidation  Expenses
shall not be redeposited  therein or otherwise  reimbursed to the Purchaser.  If
and when any such Mortgage Loan is brought current by the mortgagor, all amounts
remaining  in the  Collateral  Fund in  respect  of such  Mortgage  Loan  (after
adjustment  for  all  permitted   withdrawals  and  deposits  pursuant  to  this
subsection) shall be released to the Purchaser.

            (f) With respect to any Mortgage  Loan as to which the Purchaser has
made an Election to Delay  Foreclosure,  the related  Servicer shall continue to
service the Mortgage Loan in accordance  with its  customary  procedures  (other
than the delay in Commencement of Foreclosure as provided  herein).  If and when
the Purchaser  shall notify the Company that it believes that it is  appropriate
to do so, the related Servicer may proceed with the Commencement of Foreclosure.
In any event,  if the Mortgage  Loan is not brought  current by the mortgagor by
the time the loan becomes 6 months delinquent, the Purchaser's election shall no
longer be effective  and at the  Purchaser's  option,  either (i) the  Purchaser
shall  purchase  the Mortgage  Loan from the related  Trust Estate at a purchase
price equal to the fair market  value as shown on the Current  Appraisal,  to be
paid by (x) applying any balance in the Collateral Fund to such to such purchase
price, and (y) to the extent of any deficiency,  by wire transfer of immediately
available  funds from the  Purchaser  to the  Company for deposit in the related
Certificate  Account;  or (ii)  the  related  Servicer  shall  proceed  with the
Commencement of Foreclosure.

            (g)  Upon  the  occurrence  of a  liquidation  with  respect  to any
Mortgage  Loan as to which the Purchaser  made an Election to Delay  Foreclosure
and as to  which  the  related  Servicer  proceeded  with  the  Commencement  of
Foreclosure in accordance with subsection (f) above, the Company shall calculate
the amount, if any, by which the value shown on the Current  Appraisal  obtained
under  subsection  (c) exceeds the actual  sales price  obtained for the related
Mortgaged Property (net of Liquidation  Expenses and accrued interest related to
the extended  foreclosure  period), and the Company shall withdraw the amount of
such excess from the Collateral  Fund,  shall remit the same to the Trust Estate
and in its  capacity as Master  Servicer  shall apply such amount as  additional
Liquidation  Proceeds  pursuant to the Pooling and  Servicing  Agreement.  After
making such withdrawal,  all amounts remaining in the Collateral Fund in respect
of such  Mortgage  Loan (after  adjustment  for all  permitted  withdrawals  and
deposits pursuant to this Agreement) shall be released to the Purchaser.

            Section   6.03   Purchaser's   Election  to   Commence   Foreclosure
Proceedings.

            (a) In  connection  with any Mortgage  Loan  identified  in a report
under Section 2.01(a)(i)(B),  the Purchaser may elect to instruct the Company to
cause,  to the extent  that the  Company  as Master  Servicer  is  granted  such
authority in the related  Servicing  Agreement,  the related Servicer to proceed
with the Commencement of Foreclosure as soon as practicable.  Such election must
be evidenced by written  notice  received by the Company by 5:00 p.m.,  New York
City time, on the third Business Day following the delivery of such report under
Section 2.01(a)(i).

            (b) Within two Business  Days of making any  Election to  Foreclose,
the Purchaser shall remit to the Company, for deposit in the Collateral Fund, an
amount,  as  calculated  by the  Company,  equal to 125% of the  current  unpaid
principal balance of the Mortgage Loan and three months interest on the Mortgage
Loan at the  applicable  Mortgage  Interest  Rate. If and when any such Mortgage
Loan is brought current by the mortgagor,  all amounts in the Collateral Fund in
respect of such Mortgage Loan (after  adjustment  for all permitted  withdrawals
and deposits  pursuant to this Agreement)  shall be released to the Purchaser if
and to the extent that reimbursement therefor from amounts paid by the mortgagor
is not prohibited pursuant to the Pooling and Servicing Agreement or the related
Servicing  Agreement,  applicable law or the related mortgage note. The terms of
this  Agreement  will no longer apply to the servicing of any Mortgage Loan upon
the  failure of the  Purchaser  to deposit  the above  amounts  relating  to the
Mortgage Loan within two Business  Days of the Election to Foreclose  subject to
Section 3.01.

            (c) With respect to any Mortgage  Loan as to which the Purchaser has
made an Election to Foreclose,  the related  Servicer  shall continue to service
the  Mortgage  Loan in  accordance  with its  customary  procedures  (other than
Commencement of Foreclosure as provided herein).  In connection  therewith,  the
Company shall have the same rights to make  withdrawals for Monthly Advances and
Liquidations  Expenses from the  Collateral  Fund as are provided  under Section
2.02(e), and the Company shall make reimbursements thereto to the limited extent
provided under such subsection in accordance with its customary procedures.  The
Company shall not be required to cause, to the extent that the Company as Master
Servicer is granted  such  authority  in the related  Servicing  Agreement,  the
related Servicer to proceed with the Commencement of Foreclosure if (i) the same
is stayed as a result of the  mortgagor's  bankruptcy or is otherwise  barred by
applicable  law, or to the extent that all legal  conditions  precedent  thereto
have not yet been complied with, or (ii) the Company  believes there is a breach
of representations or warranties by the Company, a Servicer,  or a Seller, which
may result in a repurchase or  substitution  of such Mortgage Loan, or (iii) the
Company or related Servicer  reasonably  believes the Mortgaged  Property may be
contaminated with or affected by hazardous wastes or hazardous  substances (and,
without  limiting  the  related   Servicer's  right  not  to  proceed  with  the
Commencement of Foreclosure, the Company supplies the Purchaser with information
supporting  such  belief).  Any  foreclosure  that  has  been  initiated  may be
discontinued  (x) without  notice to the Purchaser if the Mortgage Loan has been
brought  current or if a refinancing  or  prepayment  occurs with respect to the
Mortgage Loan  (including by means of a short payoff  approved by the Purchaser)
or (y) with  notice to the  Purchaser  if the related  Servicer  has reached the
terms of a forbearance  agreement unless  instructed  otherwise by the Purchaser
within two Business Days of such  notification.  Any such  instruction  shall be
based upon a decision that such forbearance  agreement is not in conformity with
reasonable servicing practices.

            (d)  Upon  the  occurrence  of a  liquidation  with  respect  to any
Mortgage Loan as to which the Purchaser  made an Election to Foreclose and as to
which the related  Servicer  proceeded with the  Commencement  of Foreclosure in
accordance with subsection (c) above, the Company shall calculate the amount, if
any, by which the unpaid  principal  balance of the Mortgage Loan at the time of
liquidation  (plus  all  unreimbursed   interest  and  servicing   advances  and
Liquidation  Expenses  in  connection  therewith  other than those paid from the
Collateral  Fund)  exceeds  the actual  sales  price  obtained  for the  related
Mortgaged  Property,  and the Company  shall  withdraw the amount of such excess
from the  Collateral  Fund,  shall remit the same to the Trust Estate and in its
capacity as Master  Servicer  shall apply such amount as additional  Liquidation
Proceeds  pursuant to the Pooling and  Servicing  Agreement.  After  making such
withdrawal,  all amounts  remaining in the Collateral Fund (after adjustment for
all  withdrawals  and  deposits  pursuant to  subsection  (c) in respect of such
Mortgage Loan shall be released to the Purchaser.

            Section 6.04 Termination.

            (a) With respect to all Mortgage Loans included in the Trust Estate,
the Purchaser's  right to make any Election to Delay Foreclosure or any Election
to Foreclose and the Company's  obligations  under Section 2.01 shall  terminate
(i) at such time as the Principal  Balance of the Class B Certificates  has been
reduced  to  zero,  (ii) if the  greater  of (x) 43% (or such  lower  or  higher
percentage  that  represents  the  related  Servicer's  actual  historical  loss
experience  with respect to the Mortgage Loans in the related pool as determined
by the Company) of the aggregate  principal  balance of all Mortgage  Loans that
are in  foreclosure or are more than 90 days  delinquent on a contractual  basis
and REO  properties  or (y) the  aggregate  amount  that the  Company  estimates
through the normal servicing  practices of the related Servicer will be required
to be withdrawn  from the  Collateral  Fund with respect to Mortgage Loans as to
which the Purchaser has made an Election to Delay  Foreclosure or an Election to
Foreclosure,  exceeds  (z) the  then-current  principal  balance  of the Class B
Certificates,  (iii) upon any transfer by the  Purchaser of any interest  (other
than the minority interest therein,  but only if the transferee provides written
acknowledgment  to the Company of the Purchaser's  right hereunder and that such
transferee will have no rights  hereunder) in the Class B Certificates  (whether
or not such transfer is registered  under the Pooling and Servicing  Agreement),
including any such transfer in connection with a termination of the Trust Estate
or (iv) upon any breach of the terms of this Agreement by the Purchaser.

            (b)  Except  as  set  forth  in  2.04(a),  this  Agreement  and  the
respective  rights,  obligations and  responsibilities  of the Purchaser and the
Company  hereunder  shall  terminate  upon the  later to occur of (i) the  final
liquidation  of the  last  Mortgage  Loan as to  which  the  Purchaser  made any
Election to Delay Foreclosure or any Election to Foreclose and the withdrawal of
all remaining  amounts in the  Collateral  Fund as provided  herein and (ii) ten
Business Days' notice.  The  Purchaser's  right to make an election  pursuant to
Section 2.02 or Section 2.03 hereof with respect to a particular  Mortgage  Loan
shall terminate if the Purchaser fails to make any deposit required  pursuant to
Section  2.02(d) or 2.03(b) or if the Purchaser  fails to make any other deposit
to the Collateral Fund pursuant to this Agreement.

                                   ARTICLE VII

                       COLLATERAL FUND; SECURITY INTEREST

            Section 7.01 Collateral Fund.

            Upon receipt from the Purchaser of the initial amount required to be
deposited  in the  Collateral  Fund  pursuant to Article  II, the Company  shall
establish and maintain with Bankers Trust Company as a segregated account on its
books and records an account (the  "Collateral  Fund"),  entitled  "Norwest Bank
Minnesota,  National  Association,  as  Master  Servicer,  for  the  benefit  of
registered holders of Norwest Asset Securities Corporation Mortgage Pass-Through
Certificates, Series 1999-16. Amounts held in the Collateral Fund shall continue
to be the  property of the  Purchaser,  subject to the first  priority  security
interest  granted  hereunder  for the benefit of the  Certificateholders,  until
withdrawn from the Collateral Fund pursuant to Section 2.02 or 2.03 hereof.  The
Collateral  Fund shall be an "outside  reserve  fund"  within the meaning of the
REMIC  Provisions,  beneficially  owned by the Purchaser for federal  income tax
purposes.  All income,  gain,  deduction or loss with respect to the  Collateral
Fund shall be that of the Purchaser.  All  distributions  from the Trust Fund to
the  Collateral  Fund shall be treated as  distributed  to the  Purchaser as the
beneficial owner thereof.

            Upon the  termination of this  Agreement and the  liquidation of all
Mortgage  Loans as to  which  the  Purchaser  has  made  any  Election  to Delay
Foreclosure  or any Election to Foreclose  pursuant to Section 2.04 hereof,  the
Company shall distribute or cause to be distributed to the Purchaser all amounts
remaining  in the  Collateral  Fund  (after  adjustment  for  all  deposits  and
permitted  withdrawals  pursuant to this Agreement) together with any investment
earnings  thereon.  In the event the  Purchaser  has made any  Election to Delay
Foreclosure  or any  Election to  Foreclose,  prior to any  distribution  to the
Purchaser  of  all  amounts  remaining  in the  Collateral  Fund,  funds  in the
Collateral Fund shall be applied consistent with the terms of this Agreement.

            Section 7.02 Collateral Fund Permitted Investments.

            The Company shall, at the written direction of the Purchaser, invest
the funds in the Collateral Fund in Collateral Fund Permitted Investments.  Such
direction shall not be changed more frequently than quarterly. In the absence of
any direction,  the Company shall select such investments in accordance with the
definition of Collateral Fund Permitted Investments in its discretion.

            All  income and gain  realized  from any  investment  as well as any
interest  earned on deposits in the  Collateral  Fund (net of any losses on such
investments)  and any  payments of principal  made in respect of any  Collateral
Fund  Permitted  Investment  shall be  deposited  in the  Collateral  Fund  upon
receipt.  All costs and realized losses associated with the purchase and sale of
Collateral  Fund Permitted  Investments  shall be borne by the Purchaser and the
amount  of net  realized  losses  shall be  deposited  by the  Purchaser  in the
Collateral Fund promptly upon realization.  The Company shall  periodically (but
not more  frequently  than monthly)  distribute to the Purchaser upon request an
amount of cash,  to the extent cash is  available  therefore  in the  Collateral
Fund,  equal to the amount by which the balance of the  Collateral  Fund,  after
giving effect to all other  distributions to be made from the Collateral Fund on
such  date,  exceeds  the  Required  Collateral  Fund  Balance.  Any  amounts so
distributed  shall be  released  from the lien  and  security  interest  of this
Agreement.

            Section 7.03 Grant of Security Interest.

            The  Purchaser  hereby  grants to the Company for the benefit of the
Certificateholders under the Pooling and Servicing Agreement a security interest
in and lien on all of the  Purchaser's  right,  title and interest,  whether now
owned or hereafter acquired, in and to: (1) the Collateral Fund, (2) all amounts
deposited in the Collateral  Fund and Collateral  Fund Permitted  Investments in
which such  amounts are  invested  (and the  distributions  and proceeds of such
investments)  and (3) all cash and  non-cash  proceeds of any of the  foregoing,
including  proceeds of the  voluntary  conversion  thereof (all of the foregoing
collectively, the "Collateral").

            The Purchaser  acknowledges the lien on and the security interest in
the Collateral for the benefit of the  Certificateholders.  The Purchaser  shall
take all actions  requested  by the Company as may be  reasonably  necessary  to
perfect the security interest created under this Agreement in the Collateral and
cause it to be prior to all other  security  interests and liens,  including the
execution  and  delivery  to the  Company  for filing of  appropriate  financing
statements in accordance with applicable law. The Company shall file appropriate
continuation  statements,  or  appoint  an  agent  on its  behalf  to file  such
statements, in accordance with applicable law.

            Section 7.04 Collateral Shortfalls.

            In the event that amounts on deposit in the  Collateral  Fund at any
time are  insufficient  to cover any  withdrawals  therefrom that the Company is
then entitled to make  hereunder,  the Purchaser  shall be obligated to pay such
amounts to the Company immediately upon demand. Such obligation shall constitute
a general corporate obligation of the Purchaser. The failure to pay such amounts
within two Business Days of such demand (except for amounts to cover interest on
a Mortgage  Loan  pursuant  to Sections  2.02(d)  and 2.03 (b)),  shall cause an
immediate  termination  of the  Purchaser's  right to make any Election to Delay
Foreclosure  or Election to Foreclose and the Company's  obligations  under this
Agreement  with  respect to all  Mortgage  Loans to which  such  insufficiencies
relate, without the necessity of any further notice or demand on the part of the
Company.

                                  ARTICLE VIII

                            MISCELLANEOUS PROVISIONS

            Section 8.01 Amendment.

            This  Agreement  may be amended from time to time by the Company and
the Purchaser by written agreement signed by the Company and the Purchaser.

            Section 8.02 Counterparts.

            This  Agreement  may be  executed  simultaneously  in any  number of
counterparts,  each of which counterparts shall be deemed to be an original, and
such counterparts shall constitute but one and the same instrument.

            Section 8.03 Governing Law.

            This Agreement shall be construed in accordance with the laws of the
State  of New York and the  obligations,  rights  and  remedies  of the  parties
hereunder shall be determined in accordance with such laws.

            Section 8.04 Notices.

            All demands,  notices and direction hereunder shall be in writing or
by telecopy and shall be deemed effective upon receipt to:

            (a) in the case of the Company,

                Norwest Bank Minnesota, National Association
                7485 New Horizon Way
                Frederick, MD 21703
                Attention:  Vice President, Master Servicing
                Phone:      301-696-7800
                Fax:        301-815-6365

            (b) in the case of the Purchaser,

                __________________________

                __________________________

                __________________________

                __________________________


                Attention: _______________

            Section 8.05 Severability of Provisions.

            If any one or more of the covenants,  agreements, provision or terms
of this Agreement shall be for any reason whatsoever, including regulatory, held
invalid, then such covenants, agreements,  provisions or terms of this Agreement
and  shall  in no way  affect  the  validity  or  enforceability  of  the  other
provisions of this Agreement.

            Section 8.06 Successors and Assigns.

            The provisions of this Agreement  shall be binding upon and inure to
the benefit of the respective  successors and assigns of the parties hereto, and
all such  provisions  shall  inure  to the  benefit  of the  Certificateholders;
provided,  however,  that the rights under this Agreement  cannot be assigned by
the Purchaser without the consent of the Company.

            Section 8.07 Article and Section Headings.

            The article  and  section  headings  herein are for  convenience  of
reference only and shall not limit or otherwise affect the meaning hereof.

            Section 8.08 Confidentiality.

            The Purchaser  agrees that all information  supplied by or on behalf
of the Company pursuant to Sections 2.01 or 2.02,  including  individual account
information,  is the  property of the Company and the  Purchaser  agrees to hold
such information confidential and not to disclose such information.

            Each party hereto agrees that neither it, nor any officer, director,
employee,  affiliate or independent  contractor acting at such party's direction
will  disclose  the terms of  Section  4.09 of this  Agreement  to any person or
entity  other  than such  party's  legal  counsel  except  pursuant  to a final,
non-appealable  order of court,  the pendency of such order the other party will
have  received  notice of at least five business days prior to the date thereof,
or pursuant to the other party's prior express written consent.

            Section 8.09 Indemnification.

            The Purchaser agrees to indemnify and hold harmless the Company, the
Seller, and each Servicer and each person who controls the Company,  the Seller,
or a Servicer and each of their respective officers,  directors,  affiliates and
agents acting at the  Company's,  the Seller's,  or a Servicer's  direction (the
"Indemnified   Parties")  against  any  and  all  losses,   claims,  damages  or
liabilities  to which  they may be  subject,  insofar  as such  losses,  claims,
damages or  liabilities  (or  actions in respect  thereof)  arise out of, or are
based upon, actions taken by, or actions not taken by, the Company,  the Seller,
or a Servicer,  or on their behalf,  in accordance  with the  provisions of this
Agreement and (i) which actions conflict with the Company's,  the Seller's, or a
Servicer's  obligations under the Pooling and Servicing Agreement or the related
Servicing Agreement, or (ii) give rise to securities law liability under federal
or state securities laws with respect to the Certificates.  The Purchaser hereby
agrees to reimburse the  Indemnified  Parties for the reasonable  legal or other
expenses incurred by them in connection with investigating or defending any such
loss, claim, damage, liability or action. The indemnification obligations of the
Purchaser  hereunder  shall  survive  the  termination  or  expiration  of  this
Agreement.


<PAGE>



            IN WITNESS WHEREOF,  the Company and the Purchaser have caused their
names  to  be  signed  hereto  by  their  respective   officers  thereunto  duly
authorized, all as of the day and year first above written.

                             Norwest Bank Minnesota, National Association


                             By:
                                ------------------------------------------------
                             Name:
                                  ----------------------------------------------
                             Title:
                                   ---------------------------------------------


                             By:
                                ------------------------------------------------
                             Name:
                                  ----------------------------------------------
                             Title:
                                   ---------------------------------------------



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