FIRST UNION COMMERCIAL MORTGAGE SECURITIES INC
8-K, 1999-12-15
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 (Date of Earliest Event Reported) December 14, 1999


                First Union Commercial Mortgage Securities, Inc.
             ------------------------------------------------------
             (Exact Name of Registrant as Specified in its Charter)


                                 North Carolina
                 ----------------------------------------------
                 (State or Other Jurisdiction of Incorporation)


                                    333-62671
                            -----------------------
                            (Commission File Number


                                   56-1643598
                      ------------------------------------
                      (I.R.S. Employer Identification No.)


      One First Union Center, Charlotte, North Carolina       28228-0600
      -------------------------------------------------       ----------
        (Address of Principal Executive Offices)              (Zip Code)


                                 (704) 374-6161
              ----------------------------------------------------
              (Registrant's Telephone Number, Including Area Code)


                                 Not Applicable
          -------------------------------------------------------------
          (Former Name or Former Address, if Changed Since Last Report)

================================================================================

                                       -1-

<PAGE>



ITEM 5. OTHER EVENTS.

               On or about December 17, 1999, the Registrant will cause the
issuance and sale of approximately $699,810,000 initial principal amount of
Mortgage Pass-Through Certificates, Series 1999-C4, Class IO, Class A-1, Class
A-2, Class B, Class C, Class D, Class E, Class F, Class G, Class H, Class J,
Class K, Class L, Class M, Class N, Class R-I, Class R-II and Class R-III (the
"Certificates") pursuant to a Pooling and Servicing Agreement to be dated as of
December 1, 1999, among the Registrant, First Union National Bank, as Master
Servicer, ORIX Real Estate Capital Markets, LLC, as Special Servicer, and
Norwest Bank Minnesota, National Association, as Trustee. In connection with the
sale of certain classes of the Certificates to the public (the "Publicly Offered
Certificates"), the Registrant has been advised by First Union Securities, Inc.
and Merrill Lynch, Pierce, Fenner & Smith Incorporated (together, the
"Underwriters"), that the Underwriters have furnished to prospective investors
certain computer generated tables and/or charts displaying, with respect to any
Class or Classes of Certificates, any of the following: yield; average life;
duration; expected maturity; interest rate sensitivity; loss sensitivity; cash
flow characteristics; background information regarding the Mortgage Loans;
proposed structure; decrement tables; or similar information (tabular or
otherwise) of a statistical, mathematical, tabular or computational nature (the
"Computational Materials"), with respect to the Publicly Offered Certificates
following the effective date of Registration Statement No. 333-62671. The
Computational Materials are being filed as an exhibit to this report.

               The Computational Materials were prepared by the Underwriters at
the request of certain prospective investors, based on assumptions provided by,
and satisfying the special requirements of, such prospective investors. The
Computational Materials may be based on assumptions that differ from the
assumptions set forth in the Prospectus Supplement. The Computational Materials
may not include, and do not purport to include, information based on assumptions
representing a complete set of possible scenarios. Accordingly, the
Computational Materials may not be relevant to or appropriate for investors
other than those specifically requesting them.

               In addition, the actual characteristics and performance of the
mortgage loans underlying the Certificates (the "Mortgage Loans") may differ
from the assumptions used in the Computational Materials, which are hypothetical
in nature and which were provided to certain investors only to give a general
sense of how the yield, average life, duration, expected maturity, interest rate
sensitivity, loss sensitivity, background information regarding the Mortgage
Loans, proposed structure, decrement tables or cash flow characteristics of a
particular class of Certificates might vary under varying prepayment and other
scenarios. Any difference between such assumptions and the actual
characteristics and performance of the Mortgage Loans will affect the actual
yield, average life, duration, expected maturity, interest rate sensitivity,
loss sensitivity, background information regarding the Mortgage Loans, proposed
structure, decrement tables or cash flow characteristics of the Certificates.


                                       -2-

<PAGE>



ITEM 7. FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS.

               List below the financial statements, pro forma financial
information and exhibits, if any, filed as part of this report.

        (a)    Financial Statements of Business Acquired

               Not applicable

        (b)    Pro Forma Financial Information

               Not applicable

        (c)    Exhibits.

               99.1   Computational Materials prepared by the Underwriters in
                      connection with the sale of the Publicly Offered
                      Certificates of the Registrant.


                                       -3-

<PAGE>



                                          SIGNATURES

               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.


                             FIRST UNION COMMERCIAL MORTGAGE SECURITIES, INC.
                             (Registrant)




Dated:   December 15, 1999   By:  /s/ CRAIG M. LIEBERMAN
                                 ------------------------
                                 Name:  Craig M. Lieberman
                                 Title: Vice President




                                       -4-

<PAGE>


                                       INDEX TO EXHIBITS


Exhibit
  No.          Document Description
- -------        --------------------

99.1           Computational Materials prepared by the Underwriters in
               connection with the sale of the Publicly Offered Certificates of
               the Registrant.




                                       -5-




Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

FUNB99C4_RED Class AAA_2

<TABLE>
<S>               <C>              <C>               <C>               <C>
CUSIP                              Face              $447,304,000.00   Settle at Pricing
Coupon            7.286            Original Balance  $447,304,000.00   Accrual begins    12/1/99
Delay             14               Current Balance   $447,304,000.00   Factor Date       N/A
Stated Maturity   N/A              Factor            1
Type              SEN FIX          WAL 9.63393 yrs
YIELD CURVE:  Spread off interpolated node
3MO=5.68, 6MO=5.68, 1YR=5.68, 2YR=5.942, 5YR=6.02, 10YR=6.107, 30YR=6.208

Loan Overrides Apply
Prepay: At 0 CPR     No prepays: During any YM     Lockout and penalties: Include penalty
Default: At 0 CDR     Loss Severity: 0%     Servicer Advances: 100% of P & I     Recovery Lag: 12 mos
Extension, if balloon: None     Increase Coupon:      Pay Exten Princ:
Optional Redemption:
</TABLE>

<TABLE>
<CAPTION>
Period / Date                  Principal             Interest            Cash Flow             Balance     Prepay Penalty
<S>                       <C>                  <C>                  <C>                 <C>                    <C>
Total                     447,304,000.00       314,288,199.16       761,592,199.16                             132,020.57

  0. Dec 17, 99                     0.00                 0.00                 0.00      447,304,000.00               0.00
  1. Jan 15, 00                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
  2. Feb 15, 00                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
  3. Mar 15, 00                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
  4. Apr 15, 00                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
  5. May 15, 00                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
  6. Jun 15, 00                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
  7. Jul 15, 00                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
  8. Aug 15, 00                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
  9. Sep 15, 00                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 10. Oct 15, 00                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00

<CAPTION>
Period / Date            Princ Writedown     Accrued Interest   Interest Shortfall              Coupon
<S>                                 <C>        <C>                            <C>                  <C>
Total                               0.00       314,156,178.59                 0.00

  0. Dec 17, 99                     0.00                 0.00                 0.00              0.0000
  1. Jan 15, 00                     0.00         2,715,880.79                 0.00              7.2860
  2. Feb 15, 00                     0.00         2,715,880.79                 0.00              7.2860
  3. Mar 15, 00                     0.00         2,715,880.79                 0.00              7.2860
  4. Apr 15, 00                     0.00         2,715,880.79                 0.00              7.2860
  5. May 15, 00                     0.00         2,715,880.79                 0.00              7.2860
  6. Jun 15, 00                     0.00         2,715,880.79                 0.00              7.2860
  7. Jul 15, 00                     0.00         2,715,880.79                 0.00              7.2860
  8. Aug 15, 00                     0.00         2,715,880.79                 0.00              7.2860
  9. Sep 15, 00                     0.00         2,715,880.79                 0.00              7.2860
 10. Oct 15, 00                     0.00         2,715,880.79                 0.00              7.2860
</TABLE>

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<TABLE>
<S>                       <C>                  <C>                  <C>                 <C>                    <C>
 11. Nov 15, 00                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 12. Dec 15, 00                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 13. Jan 15, 01                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 14. Feb 15, 01                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 15. Mar 15, 01                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 16. Apr 15, 01                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 17. May 15, 01                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 18. Jun 15, 01                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 19. Jul 15, 01                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 20. Aug 15, 01                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 21. Sep 15, 01                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 22. Oct 15, 01                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 23. Nov 15, 01                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 24. Dec 15, 01                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 25. Jan 15, 02                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 26. Feb 15, 02                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 27. Mar 15, 02                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 28. Apr 15, 02                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 29. May 15, 02                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 30. Jun 15, 02                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 31. Jul 15, 02                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 32. Aug 15, 02                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 33. Sep 15, 02                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 34. Oct 15, 02                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 35. Nov 15, 02                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 36. Dec 15, 02                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 37. Jan 15, 03                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 38. Feb 15, 03                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 39. Mar 15, 03                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 40. Apr 15, 03                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00

<CAPTION>
<S>                                 <C>        <C>                           <C>        <C>
 11. Nov 15, 00                     0.00         2,715,880.79                0.00       7.2860
 12. Dec 15, 00                     0.00         2,715,880.79                0.00       7.2860
 13. Jan 15, 01                     0.00         2,715,880.79                0.00       7.2860
 14. Feb 15, 01                     0.00         2,715,880.79                0.00       7.2860
 15. Mar 15, 01                     0.00         2,715,880.79                0.00       7.2860
 16. Apr 15, 01                     0.00         2,715,880.79                0.00       7.2860
 17. May 15, 01                     0.00         2,715,880.79                0.00       7.2860
 18. Jun 15, 01                     0.00         2,715,880.79                0.00       7.2860
 19. Jul 15, 01                     0.00         2,715,880.79                0.00       7.2860
 20. Aug 15, 01                     0.00         2,715,880.79                0.00       7.2860
 21. Sep 15, 01                     0.00         2,715,880.79                0.00       7.2860
 22. Oct 15, 01                     0.00         2,715,880.79                0.00       7.2860
 23. Nov 15, 01                     0.00         2,715,880.79                0.00       7.2860
 24. Dec 15, 01                     0.00         2,715,880.79                0.00       7.2860
 25. Jan 15, 02                     0.00         2,715,880.79                0.00       7.2860
 26. Feb 15, 02                     0.00         2,715,880.79                0.00       7.2860
 27. Mar 15, 02                     0.00         2,715,880.79                0.00       7.2860
 28. Apr 15, 02                     0.00         2,715,880.79                0.00       7.2860
 29. May 15, 02                     0.00         2,715,880.79                0.00       7.2860
 30. Jun 15, 02                     0.00         2,715,880.79                0.00       7.2860
 31. Jul 15, 02                     0.00         2,715,880.79                0.00       7.2860
 32. Aug 15, 02                     0.00         2,715,880.79                0.00       7.2860
 33. Sep 15, 02                     0.00         2,715,880.79                0.00       7.2860
 34. Oct 15, 02                     0.00         2,715,880.79                0.00       7.2860
 35. Nov 15, 02                     0.00         2,715,880.79                0.00       7.2860
 36. Dec 15, 02                     0.00         2,715,880.79                0.00       7.2860
 37. Jan 15, 03                     0.00         2,715,880.79                0.00       7.2860
 38. Feb 15, 03                     0.00         2,715,880.79                0.00       7.2860
 39. Mar 15, 03                     0.00         2,715,880.79                0.00       7.2860
 40. Apr 15, 03                     0.00         2,715,880.79                0.00       7.2860
</TABLE>

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<TABLE>
<S>                       <C>                  <C>                  <C>                 <C>                    <C>
 41. May 15, 03                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 42. Jun 15, 03                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 43. Jul 15, 03                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 44. Aug 15, 03                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 45. Sep 15, 03                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 46. Oct 15, 03                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 47. Nov 15, 03                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 48. Dec 15, 03                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 49. Jan 15, 04                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 50. Feb 15, 04                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 51. Mar 15, 04                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 52. Apr 15, 04                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 53. May 15, 04                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 54. Jun 15, 04                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 55. Jul 15, 04                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 56. Aug 15, 04                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 57. Sep 15, 04                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 58. Oct 15, 04                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 59. Nov 15, 04                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 60. Dec 15, 04                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 61. Jan 15, 05                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 62. Feb 15, 05                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 63. Mar 15, 05                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 64. Apr 15, 05                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 65. May 15, 05                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 66. Jun 15, 05                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 67. Jul 15, 05                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 68. Aug 15, 05                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 69. Sep 15, 05                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 70. Oct 15, 05                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00

<CAPTION>
<S>                        <C>        <C>                           <C>        <C>
 41. May 15, 03            0.00         2,715,880.79                0.00       7.2860
 42. Jun 15, 03            0.00         2,715,880.79                0.00       7.2860
 43. Jul 15, 03            0.00         2,715,880.79                0.00       7.2860
 44. Aug 15, 03            0.00         2,715,880.79                0.00       7.2860
 45. Sep 15, 03            0.00         2,715,880.79                0.00       7.2860
 46. Oct 15, 03            0.00         2,715,880.79                0.00       7.2860
 47. Nov 15, 03            0.00         2,715,880.79                0.00       7.2860
 48. Dec 15, 03            0.00         2,715,880.79                0.00       7.2860
 49. Jan 15, 04            0.00         2,715,880.79                0.00       7.2860
 50. Feb 15, 04            0.00         2,715,880.79                0.00       7.2860
 51. Mar 15, 04            0.00         2,715,880.79                0.00       7.2860
 52. Apr 15, 04            0.00         2,715,880.79                0.00       7.2860
 53. May 15, 04            0.00         2,715,880.79                0.00       7.2860
 54. Jun 15, 04            0.00         2,715,880.79                0.00       7.2860
 55. Jul 15, 04            0.00         2,715,880.79                0.00       7.2860
 56. Aug 15, 04            0.00         2,715,880.79                0.00       7.2860
 57. Sep 15, 04            0.00         2,715,880.79                0.00       7.2860
 58. Oct 15, 04            0.00         2,715,880.79                0.00       7.2860
 59. Nov 15, 04            0.00         2,715,880.79                0.00       7.2860
 60. Dec 15, 04            0.00         2,715,880.79                0.00       7.2860
 61. Jan 15, 05            0.00         2,715,880.79                0.00       7.2860
 62. Feb 15, 05            0.00         2,715,880.79                0.00       7.2860
 63. Mar 15, 05            0.00         2,715,880.79                0.00       7.2860
 64. Apr 15, 05            0.00         2,715,880.79                0.00       7.2860
 65. May 15, 05            0.00         2,715,880.79                0.00       7.2860
 66. Jun 15, 05            0.00         2,715,880.79                0.00       7.2860
 67. Jul 15, 05            0.00         2,715,880.79                0.00       7.2860
 68. Aug 15, 05            0.00         2,715,880.79                0.00       7.2860
 69. Sep 15, 05            0.00         2,715,880.79                0.00       7.2860
 70. Oct 15, 05            0.00         2,715,880.79                0.00       7.2860
</TABLE>

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<TABLE>
<S>                       <C>                  <C>                  <C>                 <C>                    <C>
 71. Nov 15, 05                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 72. Dec 15, 05                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 73. Jan 15, 06                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 74. Feb 15, 06                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 75. Mar 15, 06                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 76. Apr 15, 06                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 77. May 15, 06                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 78. Jun 15, 06                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 79. Jul 15, 06                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 80. Aug 15, 06                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 81. Sep 15, 06                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 82. Oct 15, 06                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 83. Nov 15, 06                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 84. Dec 15, 06                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 85. Jan 15, 07                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 86. Feb 15, 07                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 87. Mar 15, 07                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 88. Apr 15, 07                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 89. May 15, 07                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 90. Jun 15, 07                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 91. Jul 15, 07                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 92. Aug 15, 07                     0.00         2,715,880.79         2,715,880.79      447,304,000.00               0.00
 93. Sep 15, 07            11,153,441.48         2,720,027.45        13,873,468.94      436,150,558.52           4,146.67
 94. Oct 15, 07             1,034,531.10         2,656,217.68         3,690,748.77      435,116,027.42           8,056.87
 95. Nov 15, 07               899,429.95         2,649,680.81         3,549,110.75      434,216,597.47           7,801.33
 96. Dec 15, 07             1,087,598.16         2,643,891.15         3,731,489.31      433,128,999.31           7,472.71
 97. Jan 15, 08               903,114.05         2,637,039.38         3,540,153.43      432,225,885.26           7,224.47
 98. Feb 15, 08               905,106.71         2,631,310.49         3,536,417.20      431,320,778.55           6,978.99
 99. Mar 15, 08             1,180,640.69         2,625,571.45         3,806,212.14      430,140,137.87           6,735.46
100. Apr 15, 08               911,255.10         2,618,163.18         3,529,418.29      429,228,882.77           6,495.65

<CAPTION>
<S>                          <C>        <C>                           <C>        <C>
 71. Nov 15, 05              0.00         2,715,880.79                0.00       7.2860
 72. Dec 15, 05              0.00         2,715,880.79                0.00       7.2860
 73. Jan 15, 06              0.00         2,715,880.79                0.00       7.2860
 74. Feb 15, 06              0.00         2,715,880.79                0.00       7.2860
 75. Mar 15, 06              0.00         2,715,880.79                0.00       7.2860
 76. Apr 15, 06              0.00         2,715,880.79                0.00       7.2860
 77. May 15, 06              0.00         2,715,880.79                0.00       7.2860
 78. Jun 15, 06              0.00         2,715,880.79                0.00       7.2860
 79. Jul 15, 06              0.00         2,715,880.79                0.00       7.2860
 80. Aug 15, 06              0.00         2,715,880.79                0.00       7.2860
 81. Sep 15, 06              0.00         2,715,880.79                0.00       7.2860
 82. Oct 15, 06              0.00         2,715,880.79                0.00       7.2860
 83. Nov 15, 06              0.00         2,715,880.79                0.00       7.2860
 84. Dec 15, 06              0.00         2,715,880.79                0.00       7.2860
 85. Jan 15, 07              0.00         2,715,880.79                0.00       7.2860
 86. Feb 15, 07              0.00         2,715,880.79                0.00       7.2860
 87. Mar 15, 07              0.00         2,715,880.79                0.00       7.2860
 88. Apr 15, 07              0.00         2,715,880.79                0.00       7.2860
 89. May 15, 07              0.00         2,715,880.79                0.00       7.2860
 90. Jun 15, 07              0.00         2,715,880.79                0.00       7.2860
 91. Jul 15, 07              0.00         2,715,880.79                0.00       7.2860
 92. Aug 15, 07              0.00         2,715,880.79                0.00       7.2860
 93. Sep 15, 07              0.00         2,715,880.79                0.00       7.2860
 94. Oct 15, 07              0.00         2,648,160.81                0.00       7.2860
 95. Nov 15, 07              0.00         2,641,879.48                0.00       7.2860
 96. Dec 15, 07              0.00         2,636,418.44                0.00       7.2860
 97. Jan 15, 08              0.00         2,629,814.91                0.00       7.2860
 98. Feb 15, 08              0.00         2,624,331.50                0.00       7.2860
 99. Mar 15, 08              0.00         2,618,835.99                0.00       7.2860
100. Apr 15, 08              0.00         2,611,667.54                0.00       7.2860
</TABLE>

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<TABLE>
<S>                       <C>                  <C>                  <C>                 <C>                    <C>
101. May 15, 08             1,049,829.49         2,612,393.04         3,662,222.53      428,179,053.28           6,258.34
102. Jun 15, 08             3,436,566.24         2,605,641.72         6,042,207.97      424,742,487.03           5,881.24
103. Jul 15, 08             1,049,608.06         2,584,548.27         3,634,156.34      423,692,878.97           5,653.47
104. Aug 15, 08               917,251.30         2,577,950.88         3,495,202.17      422,775,627.67           5,428.94
105. Sep 15, 08               919,929.04         2,572,150.65         3,492,079.69      421,855,698.64           5,197.97
106. Oct 15, 08             1,057,958.31         2,566,332.08         3,624,290.39      420,797,740.33           4,964.90
107. Nov 15, 08             3,935,949.08         2,559,682.06         6,495,631.14      416,861,791.25           4,738.45
108. Dec 15, 08             2,414,989.05         2,535,498.51         4,950,487.56      414,446,802.20           4,452.67
109. Jan 15, 09               924,478.60         2,520,662.45         3,445,141.05      413,522,323.60           4,279.61
110. Feb 15, 09               927,572.97         2,514,898.86         3,442,471.82      412,594,750.63           4,129.15
111. Mar 15, 09             1,330,725.75         2,509,119.82         3,839,845.57      411,264,024.88           3,982.03
112. Apr 15, 09               936,776.61         2,500,926.17         3,437,702.79      410,327,248.26           3,868.10
113. May 15, 09             1,072,982.50         2,495,140.39         3,568,122.88      409,254,265.77           3,770.11
114. Jun 15, 09            32,434,354.49         2,488,014.67        34,922,369.16      376,819,911.28           3,159.19
115. Jul 15, 09            32,591,688.59         2,290,769.94        34,882,458.53      344,228,222.68           2,845.04
116. Aug 15, 09            22,925,574.01         2,092,807.64        25,018,381.66      321,302,648.67           2,768.62
117. Sep 15, 09           140,983,033.65         1,953,536.42       142,936,570.07      180,319,615.02           2,693.84
118. Oct 15, 09           152,763,053.33         1,097,461.28       153,860,514.61       27,556,561.69           2,620.68
119. Nov 15, 09            27,556,561.69           167,730.34        27,724,292.03                0.00             416.08

<CAPTION>
<S>                         <C>        <C>                           <C>        <C>
101. May 15, 08             0.00         2,606,134.70                0.00       7.2860
102. Jun 15, 08             0.00         2,599,760.49                0.00       7.2860
103. Jul 15, 08             0.00         2,578,894.80                0.00       7.2860
104. Aug 15, 08             0.00         2,572,521.93                0.00       7.2860
105. Sep 15, 08             0.00         2,566,952.69                0.00       7.2860
106. Oct 15, 08             0.00         2,561,367.18                0.00       7.2860
107. Nov 15, 08             0.00         2,554,943.61                0.00       7.2860
108. Dec 15, 08             0.00         2,531,045.84                0.00       7.2860
109. Jan 15, 09             0.00         2,516,382.83                0.00       7.2860
110. Feb 15, 09             0.00         2,510,769.71                0.00       7.2860
111. Mar 15, 09             0.00         2,505,137.79                0.00       7.2860
112. Apr 15, 09             0.00         2,497,058.07                0.00       7.2860
113. May 15, 09             0.00         2,491,370.28                0.00       7.2860
114. Jun 15, 09             0.00         2,484,855.48                0.00       7.2860
115. Jul 15, 09             0.00         2,287,924.89                0.00       7.2860
116. Aug 15, 09             0.00         2,090,039.03                0.00       7.2860
117. Sep 15, 09             0.00         1,950,842.58                0.00       7.2860
118. Oct 15, 09             0.00         1,094,840.60                0.00       7.2860
119. Nov 15, 09             0.00           167,314.26                0.00       7.2860
</TABLE>

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

FUNB99C4_RED, Class AAA_2

<TABLE>
<S>                 <C>                 <C>                 <C>                 <C>
CUSIP                                   Face                $447,304,000.00     Settle at Pricing
Coupon              7.286               Original Balance    $447,304,000.00     Accrual begins      12/1/99
Delay               14                  Current Balance     $447,304,000.00     Factor Date         N/A
Stated Maturity     N/A                 Factor              1
Type                SEN FIX             WAL 9.66214 yrs
YIELD CURVE:  Spread off interpolated node
3MO=5.68, 6MO=5.68, 1YR=5.68, 2YR=5.942, 5YR=6.02, 10YR=6.107, 30YR=6.208

Loan Overrides Apply
Prepay: At 25 CPR     No prepays: During any YM     Lockout and penalties: Include penalty
Default: At 0 CDR     Loss Severity: 0%     Servicer Advances: 100% of P & I     Recovery Lag: 12 mos
Extension, if balloon: None     Increase Coupon:      Pay Exten Princ:
Optional Redemption:
shock=-100 bp
</TABLE>

<TABLE>
<CAPTION>
Period / Date                 Principal            Interest           Cash Flow             Balance    Prepay Penalty
<S>                      <C>                 <C>                 <C>                 <C>                   <C>
Total                    447,304,000.00      315,342,976.29      762,646,976.29                            267,249.52

  0. Dec 17, 99                    0.00                0.00                0.00      447,304,000.00              0.00
  1. Jan 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
  2. Feb 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
  3. Mar 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
  4. Apr 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
  5. May 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
  6. Jun 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
  7. Jul 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
  8. Aug 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
  9. Sep 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00

<CAPTION>
Period / Date           Princ Writedown    Accrued Interest  Interest Shortfall              Coupon
<S>                                <C>       <C>                           <C>               <C>
Total                              0.00      315,075,726.77                0.00

  0. Dec 17, 99                    0.00                0.00                0.00              0.0000
  1. Jan 15, 00                    0.00        2,715,880.79                0.00              7.2860
  2. Feb 15, 00                    0.00        2,715,880.79                0.00              7.2860
  3. Mar 15, 00                    0.00        2,715,880.79                0.00              7.2860
  4. Apr 15, 00                    0.00        2,715,880.79                0.00              7.2860
  5. May 15, 00                    0.00        2,715,880.79                0.00              7.2860
  6. Jun 15, 00                    0.00        2,715,880.79                0.00              7.2860
  7. Jul 15, 00                    0.00        2,715,880.79                0.00              7.2860
  8. Aug 15, 00                    0.00        2,715,880.79                0.00              7.2860
  9. Sep 15, 00                    0.00        2,715,880.79                0.00              7.2860
</TABLE>

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<TABLE>
<S>                      <C>                 <C>                 <C>                 <C>                   <C>
 10. Oct 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 11. Nov 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 12. Dec 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 13. Jan 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 14. Feb 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 15. Mar 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 16. Apr 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 17. May 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 18. Jun 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 19. Jul 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 20. Aug 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 21. Sep 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 22. Oct 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 23. Nov 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 24. Dec 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 25. Jan 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 26. Feb 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 27. Mar 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 28. Apr 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 29. May 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 30. Jun 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 31. Jul 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 32. Aug 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 33. Sep 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 34. Oct 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 35. Nov 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 36. Dec 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 37. Jan 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 38. Feb 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 39. Mar 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00

<CAPTION>
<S>                      <C>       <C>                           <C>       <C>
 10. Oct 15, 00          0.00        2,715,880.79                0.00      7.2860
 11. Nov 15, 00          0.00        2,715,880.79                0.00      7.2860
 12. Dec 15, 00          0.00        2,715,880.79                0.00      7.2860
 13. Jan 15, 01          0.00        2,715,880.79                0.00      7.2860
 14. Feb 15, 01          0.00        2,715,880.79                0.00      7.2860
 15. Mar 15, 01          0.00        2,715,880.79                0.00      7.2860
 16. Apr 15, 01          0.00        2,715,880.79                0.00      7.2860
 17. May 15, 01          0.00        2,715,880.79                0.00      7.2860
 18. Jun 15, 01          0.00        2,715,880.79                0.00      7.2860
 19. Jul 15, 01          0.00        2,715,880.79                0.00      7.2860
 20. Aug 15, 01          0.00        2,715,880.79                0.00      7.2860
 21. Sep 15, 01          0.00        2,715,880.79                0.00      7.2860
 22. Oct 15, 01          0.00        2,715,880.79                0.00      7.2860
 23. Nov 15, 01          0.00        2,715,880.79                0.00      7.2860
 24. Dec 15, 01          0.00        2,715,880.79                0.00      7.2860
 25. Jan 15, 02          0.00        2,715,880.79                0.00      7.2860
 26. Feb 15, 02          0.00        2,715,880.79                0.00      7.2860
 27. Mar 15, 02          0.00        2,715,880.79                0.00      7.2860
 28. Apr 15, 02          0.00        2,715,880.79                0.00      7.2860
 29. May 15, 02          0.00        2,715,880.79                0.00      7.2860
 30. Jun 15, 02          0.00        2,715,880.79                0.00      7.2860
 31. Jul 15, 02          0.00        2,715,880.79                0.00      7.2860
 32. Aug 15, 02          0.00        2,715,880.79                0.00      7.2860
 33. Sep 15, 02          0.00        2,715,880.79                0.00      7.2860
 34. Oct 15, 02          0.00        2,715,880.79                0.00      7.2860
 35. Nov 15, 02          0.00        2,715,880.79                0.00      7.2860
 36. Dec 15, 02          0.00        2,715,880.79                0.00      7.2860
 37. Jan 15, 03          0.00        2,715,880.79                0.00      7.2860
 38. Feb 15, 03          0.00        2,715,880.79                0.00      7.2860
 39. Mar 15, 03          0.00        2,715,880.79                0.00      7.2860
</TABLE>

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<TABLE>
<S>                      <C>                 <C>                 <C>                 <C>                   <C>
 40. Apr 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 41. May 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 42. Jun 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 43. Jul 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 44. Aug 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 45. Sep 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 46. Oct 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 47. Nov 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 48. Dec 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 49. Jan 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 50. Feb 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 51. Mar 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 52. Apr 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 53. May 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 54. Jun 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 55. Jul 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 56. Aug 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 57. Sep 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 58. Oct 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 59. Nov 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 60. Dec 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 61. Jan 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 62. Feb 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 63. Mar 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 64. Apr 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 65. May 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 66. Jun 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 67. Jul 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 68. Aug 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 69. Sep 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00

<CAPTION>
<S>                      <C>       <C>                           <C>       <C>
 40. Apr 15, 03          0.00        2,715,880.79                0.00      7.2860
 41. May 15, 03          0.00        2,715,880.79                0.00      7.2860
 42. Jun 15, 03          0.00        2,715,880.79                0.00      7.2860
 43. Jul 15, 03          0.00        2,715,880.79                0.00      7.2860
 44. Aug 15, 03          0.00        2,715,880.79                0.00      7.2860
 45. Sep 15, 03          0.00        2,715,880.79                0.00      7.2860
 46. Oct 15, 03          0.00        2,715,880.79                0.00      7.2860
 47. Nov 15, 03          0.00        2,715,880.79                0.00      7.2860
 48. Dec 15, 03          0.00        2,715,880.79                0.00      7.2860
 49. Jan 15, 04          0.00        2,715,880.79                0.00      7.2860
 50. Feb 15, 04          0.00        2,715,880.79                0.00      7.2860
 51. Mar 15, 04          0.00        2,715,880.79                0.00      7.2860
 52. Apr 15, 04          0.00        2,715,880.79                0.00      7.2860
 53. May 15, 04          0.00        2,715,880.79                0.00      7.2860
 54. Jun 15, 04          0.00        2,715,880.79                0.00      7.2860
 55. Jul 15, 04          0.00        2,715,880.79                0.00      7.2860
 56. Aug 15, 04          0.00        2,715,880.79                0.00      7.2860
 57. Sep 15, 04          0.00        2,715,880.79                0.00      7.2860
 58. Oct 15, 04          0.00        2,715,880.79                0.00      7.2860
 59. Nov 15, 04          0.00        2,715,880.79                0.00      7.2860
 60. Dec 15, 04          0.00        2,715,880.79                0.00      7.2860
 61. Jan 15, 05          0.00        2,715,880.79                0.00      7.2860
 62. Feb 15, 05          0.00        2,715,880.79                0.00      7.2860
 63. Mar 15, 05          0.00        2,715,880.79                0.00      7.2860
 64. Apr 15, 05          0.00        2,715,880.79                0.00      7.2860
 65. May 15, 05          0.00        2,715,880.79                0.00      7.2860
 66. Jun 15, 05          0.00        2,715,880.79                0.00      7.2860
 67. Jul 15, 05          0.00        2,715,880.79                0.00      7.2860
 68. Aug 15, 05          0.00        2,715,880.79                0.00      7.2860
 69. Sep 15, 05          0.00        2,715,880.79                0.00      7.2860
</TABLE>

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<TABLE>
<S>                      <C>                 <C>                 <C>                 <C>                   <C>
 70. Oct 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 71. Nov 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 72. Dec 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 73. Jan 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 74. Feb 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 75. Mar 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 76. Apr 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 77. May 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 78. Jun 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 79. Jul 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 80. Aug 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 81. Sep 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 82. Oct 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 83. Nov 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 84. Dec 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 85. Jan 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 86. Feb 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 87. Mar 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 88. Apr 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 89. May 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 90. Jun 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 91. Jul 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 92. Aug 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 93. Sep 15, 07            2,392,493.95        2,717,588.97        5,110,082.92      444,911,506.05          1,708.18
 94. Oct 15, 07            1,026,394.09        2,716,262.36        3,742,656.45      443,885,111.96         14,908.00
 95. Nov 15, 07              892,336.81        2,709,696.34        3,602,033.15      442,992,775.14         14,573.90
 96. Dec 15, 07            1,152,797.75        2,703,785.05        3,856,582.80      441,839,977.39         14,080.59
 97. Jan 15, 08              899,471.92        2,696,456.23        3,595,928.15      440,940,505.48         13,751.16
 98. Feb 15, 08              903,172.49        2,690,666.60        3,593,839.09      440,037,332.98         13,422.83
 99. Mar 15, 08            1,182,048.84        2,684,854.47        3,866,903.31      438,855,284.14         13,094.46

<CAPTION>
<S>                     <C>       <C>                           <C>       <C>
 70. Oct 15, 05         0.00        2,715,880.79                0.00      7.2860
 71. Nov 15, 05         0.00        2,715,880.79                0.00      7.2860
 72. Dec 15, 05         0.00        2,715,880.79                0.00      7.2860
 73. Jan 15, 06         0.00        2,715,880.79                0.00      7.2860
 74. Feb 15, 06         0.00        2,715,880.79                0.00      7.2860
 75. Mar 15, 06         0.00        2,715,880.79                0.00      7.2860
 76. Apr 15, 06         0.00        2,715,880.79                0.00      7.2860
 77. May 15, 06         0.00        2,715,880.79                0.00      7.2860
 78. Jun 15, 06         0.00        2,715,880.79                0.00      7.2860
 79. Jul 15, 06         0.00        2,715,880.79                0.00      7.2860
 80. Aug 15, 06         0.00        2,715,880.79                0.00      7.2860
 81. Sep 15, 06         0.00        2,715,880.79                0.00      7.2860
 82. Oct 15, 06         0.00        2,715,880.79                0.00      7.2860
 83. Nov 15, 06         0.00        2,715,880.79                0.00      7.2860
 84. Dec 15, 06         0.00        2,715,880.79                0.00      7.2860
 85. Jan 15, 07         0.00        2,715,880.79                0.00      7.2860
 86. Feb 15, 07         0.00        2,715,880.79                0.00      7.2860
 87. Mar 15, 07         0.00        2,715,880.79                0.00      7.2860
 88. Apr 15, 07         0.00        2,715,880.79                0.00      7.2860
 89. May 15, 07         0.00        2,715,880.79                0.00      7.2860
 90. Jun 15, 07         0.00        2,715,880.79                0.00      7.2860
 91. Jul 15, 07         0.00        2,715,880.79                0.00      7.2860
 92. Aug 15, 07         0.00        2,715,880.79                0.00      7.2860
 93. Sep 15, 07         0.00        2,715,880.79                0.00      7.2860
 94. Oct 15, 07         0.00        2,701,354.36                0.00      7.2860
 95. Nov 15, 07         0.00        2,695,122.44                0.00      7.2860
 96. Dec 15, 07         0.00        2,689,704.47                0.00      7.2860
 97. Jan 15, 08         0.00        2,682,705.06                0.00      7.2860
 98. Feb 15, 08         0.00        2,677,243.77                0.00      7.2860
 99. Mar 15, 08         0.00        2,671,760.01                0.00      7.2860
</TABLE>

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<TABLE>
<S>                      <C>                 <C>                 <C>                 <C>                   <C>
100. Apr 15, 08              912,614.85        2,677,351.48        3,589,966.33      437,942,669.29         12,768.48
101. May 15, 08            1,053,603.91        2,671,485.09        3,725,089.00      436,889,065.38         12,443.18
102. Jun 15, 08            3,593,047.99        2,664,444.31        6,257,492.29      433,296,017.40         11,799.53
103. Jul 15, 08            1,056,016.04        2,642,311.10        3,698,327.14      432,240,001.36         11,482.11
104. Aug 15, 08              924,249.71        2,635,583.64        3,559,833.35      431,315,751.65         11,166.43
105. Sep 15, 08            1,031,112.61        2,629,649.46        3,660,762.06      430,284,639.04         10,843.99
106. Oct 15, 08            1,168,491.94        2,623,062.36        3,791,554.31      429,116,147.10         10,517.46
107. Nov 15, 08            3,835,393.05        2,615,645.76        6,451,038.81      425,280,754.05         10,195.55
108. Dec 15, 08            2,756,047.72        2,591,886.25        5,347,933.97      422,524,706.33          9,723.27
109. Jan 15, 09            1,266,622.30        2,574,841.55        3,841,463.86      421,258,084.03          9,412.38
110. Feb 15, 09            1,260,687.97        2,566,844.23        3,827,532.20      419,997,396.06          9,105.57
111. Mar 15, 09            2,210,994.49        2,558,886.46        4,769,880.95      417,786,401.57          8,802.27
112. Apr 15, 09            2,054,894.14        2,545,221.37        4,600,115.51      415,731,507.43          8,561.60
113. May 15, 09            3,179,365.27        2,532,529.82        5,711,895.08      412,552,142.16          8,346.68
114. Jun 15, 09           31,709,885.12        2,512,429.48       34,222,314.60      380,842,257.04          7,550.39
115. Jul 15, 09           35,051,263.02        2,319,499.49       37,370,762.51      345,790,994.02          7,152.26
116. Aug 15, 09           31,024,215.69        2,106,550.50       33,130,766.19      314,766,778.33          7,022.85
117. Sep 15, 09          143,485,780.93        1,918,186.35      145,403,967.27      171,280,997.40          7,027.39
118. Oct 15, 09          150,121,226.24        1,046,858.37      151,168,084.61       21,159,771.16          6,897.25
119. Nov 15, 09           21,159,771.16          129,366.84       21,289,138.00                0.00            891.76

<CAPTION>
<S>                    <C>       <C>                           <C>       <C>
100. Apr 15, 08        0.00        2,664,583.00                0.00      7.2860
101. May 15, 08        0.00        2,659,041.91                0.00      7.2860
102. Jun 15, 08        0.00        2,652,644.78                0.00      7.2860
103. Jul 15, 08        0.00        2,630,828.99                0.00      7.2860
104. Aug 15, 08        0.00        2,624,417.21                0.00      7.2860
105. Sep 15, 08        0.00        2,618,805.47                0.00      7.2860
106. Oct 15, 08        0.00        2,612,544.90                0.00      7.2860
107. Nov 15, 08        0.00        2,605,450.21                0.00      7.2860
108. Dec 15, 08        0.00        2,582,162.98                0.00      7.2860
109. Jan 15, 09        0.00        2,565,429.18                0.00      7.2860
110. Feb 15, 09        0.00        2,557,738.67                0.00      7.2860
111. Mar 15, 09        0.00        2,550,084.19                0.00      7.2860
112. Apr 15, 09        0.00        2,536,659.77                0.00      7.2860
113. May 15, 09        0.00        2,524,183.14                0.00      7.2860
114. Jun 15, 09        0.00        2,504,879.09                0.00      7.2860
115. Jul 15, 09        0.00        2,312,347.24                0.00      7.2860
116. Aug 15, 09        0.00        2,099,527.65                0.00      7.2860
117. Sep 15, 09        0.00        1,911,158.96                0.00      7.2860
118. Oct 15, 09        0.00        1,039,961.12                0.00      7.2860
119. Nov 15, 09        0.00          128,475.08                0.00      7.2860
</TABLE>

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

FUNB99C4_RED, Class AAA_2


<TABLE>
<S>                 <C>                 <C>                 <C>                 <C>
CUSIP                                   Face                $447,304,000.00     Settle at Pricing
Coupon              7.286               Original Balance    $447,304,000.00     Accrual begins      12/1/99
Delay               14                  Current Balance     $447,304,000.00     Factor Date         N/A
Stated Maturity     N/A                 Factor              1
Type                SEN FIX             WAL 9.66214 yrs
YIELD CURVE:  Spread off interpolated node
3MO=5.68, 6MO=5.68, 1YR=5.68, 2YR=5.942, 5YR=6.02, 10YR=6.107, 30YR=6.208

Loan Overrides Apply
Prepay: At 25 CPR     No prepays: During any YM     Lockout and penalties: Include penalty
Default: At 0 CDR     Loss Severity: 0%     Servicer Advances: 100% of P & I     Recovery Lag: 12 mos
Extension, if balloon: None     Increase Coupon:      Pay Exten Princ:
Optional Redemption:
</TABLE>

<TABLE>
<CAPTION>
Period / Date                 Principal            Interest           Cash Flow             Balance    Prepay Penalty
<S>                      <C>                 <C>                 <C>                 <C>                   <C>
Total                    447,304,000.00      315,223,745.44      762,527,745.44                            148,018.67

  0. Dec 17, 99                    0.00                0.00                0.00      447,304,000.00              0.00
  1. Jan 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
  2. Feb 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
  3. Mar 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
  4. Apr 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
  5. May 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
  6. Jun 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
  7. Jul 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
  8. Aug 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
  9. Sep 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 10. Oct 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00

<CAPTION>
Period / Date           Princ Writedown    Accrued Interest  Interest Shortfall              Coupon
<S>                                <C>       <C>                           <C>               <C>
Total                              0.00      315,075,726.77                0.00

  0. Dec 17, 99                    0.00                0.00                0.00              0.0000
  1. Jan 15, 00                    0.00        2,715,880.79                0.00              7.2860
  2. Feb 15, 00                    0.00        2,715,880.79                0.00              7.2860
  3. Mar 15, 00                    0.00        2,715,880.79                0.00              7.2860
  4. Apr 15, 00                    0.00        2,715,880.79                0.00              7.2860
  5. May 15, 00                    0.00        2,715,880.79                0.00              7.2860
  6. Jun 15, 00                    0.00        2,715,880.79                0.00              7.2860
  7. Jul 15, 00                    0.00        2,715,880.79                0.00              7.2860
  8. Aug 15, 00                    0.00        2,715,880.79                0.00              7.2860
  9. Sep 15, 00                    0.00        2,715,880.79                0.00              7.2860
 10. Oct 15, 00                    0.00        2,715,880.79                0.00              7.2860
</TABLE>

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<TABLE>
<S>                      <C>                 <C>                 <C>                 <C>                   <C>
 11. Nov 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 12. Dec 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 13. Jan 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 14. Feb 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 15. Mar 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 16. Apr 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 17. May 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 18. Jun 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 19. Jul 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 20. Aug 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 21. Sep 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 22. Oct 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 23. Nov 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 24. Dec 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 25. Jan 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 26. Feb 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 27. Mar 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 28. Apr 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 29. May 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 30. Jun 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 31. Jul 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 32. Aug 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 33. Sep 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 34. Oct 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 35. Nov 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 36. Dec 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 37. Jan 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 38. Feb 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 39. Mar 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 40. Apr 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00

<CAPTION>
<S>                      <C>       <C>                           <C>       <C>
 11. Nov 15, 00          0.00        2,715,880.79                0.00      7.2860
 12. Dec 15, 00          0.00        2,715,880.79                0.00      7.2860
 13. Jan 15, 01          0.00        2,715,880.79                0.00      7.2860
 14. Feb 15, 01          0.00        2,715,880.79                0.00      7.2860
 15. Mar 15, 01          0.00        2,715,880.79                0.00      7.2860
 16. Apr 15, 01          0.00        2,715,880.79                0.00      7.2860
 17. May 15, 01          0.00        2,715,880.79                0.00      7.2860
 18. Jun 15, 01          0.00        2,715,880.79                0.00      7.2860
 19. Jul 15, 01          0.00        2,715,880.79                0.00      7.2860
 20. Aug 15, 01          0.00        2,715,880.79                0.00      7.2860
 21. Sep 15, 01          0.00        2,715,880.79                0.00      7.2860
 22. Oct 15, 01          0.00        2,715,880.79                0.00      7.2860
 23. Nov 15, 01          0.00        2,715,880.79                0.00      7.2860
 24. Dec 15, 01          0.00        2,715,880.79                0.00      7.2860
 25. Jan 15, 02          0.00        2,715,880.79                0.00      7.2860
 26. Feb 15, 02          0.00        2,715,880.79                0.00      7.2860
 27. Mar 15, 02          0.00        2,715,880.79                0.00      7.2860
 28. Apr 15, 02          0.00        2,715,880.79                0.00      7.2860
 29. May 15, 02          0.00        2,715,880.79                0.00      7.2860
 30. Jun 15, 02          0.00        2,715,880.79                0.00      7.2860
 31. Jul 15, 02          0.00        2,715,880.79                0.00      7.2860
 32. Aug 15, 02          0.00        2,715,880.79                0.00      7.2860
 33. Sep 15, 02          0.00        2,715,880.79                0.00      7.2860
 34. Oct 15, 02          0.00        2,715,880.79                0.00      7.2860
 35. Nov 15, 02          0.00        2,715,880.79                0.00      7.2860
 36. Dec 15, 02          0.00        2,715,880.79                0.00      7.2860
 37. Jan 15, 03          0.00        2,715,880.79                0.00      7.2860
 38. Feb 15, 03          0.00        2,715,880.79                0.00      7.2860
 39. Mar 15, 03          0.00        2,715,880.79                0.00      7.2860
 40. Apr 15, 03          0.00        2,715,880.79                0.00      7.2860
</TABLE>

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<TABLE>
<S>                      <C>                 <C>                 <C>                 <C>                   <C>
 41. May 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 42. Jun 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 43. Jul 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 44. Aug 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 45. Sep 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 46. Oct 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 47. Nov 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 48. Dec 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 49. Jan 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 50. Feb 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 51. Mar 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 52. Apr 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 53. May 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 54. Jun 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 55. Jul 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 56. Aug 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 57. Sep 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 58. Oct 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 59. Nov 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 60. Dec 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 61. Jan 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 62. Feb 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 63. Mar 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 64. Apr 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 65. May 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 66. Jun 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 67. Jul 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 68. Aug 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 69. Sep 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 70. Oct 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00

<CAPTION>
<S>                     <C>       <C>                           <C>       <C>
 41. May 15, 03         0.00        2,715,880.79                0.00      7.2860
 42. Jun 15, 03         0.00        2,715,880.79                0.00      7.2860
 43. Jul 15, 03         0.00        2,715,880.79                0.00      7.2860
 44. Aug 15, 03         0.00        2,715,880.79                0.00      7.2860
 45. Sep 15, 03         0.00        2,715,880.79                0.00      7.2860
 46. Oct 15, 03         0.00        2,715,880.79                0.00      7.2860
 47. Nov 15, 03         0.00        2,715,880.79                0.00      7.2860
 48. Dec 15, 03         0.00        2,715,880.79                0.00      7.2860
 49. Jan 15, 04         0.00        2,715,880.79                0.00      7.2860
 50. Feb 15, 04         0.00        2,715,880.79                0.00      7.2860
 51. Mar 15, 04         0.00        2,715,880.79                0.00      7.2860
 52. Apr 15, 04         0.00        2,715,880.79                0.00      7.2860
 53. May 15, 04         0.00        2,715,880.79                0.00      7.2860
 54. Jun 15, 04         0.00        2,715,880.79                0.00      7.2860
 55. Jul 15, 04         0.00        2,715,880.79                0.00      7.2860
 56. Aug 15, 04         0.00        2,715,880.79                0.00      7.2860
 57. Sep 15, 04         0.00        2,715,880.79                0.00      7.2860
 58. Oct 15, 04         0.00        2,715,880.79                0.00      7.2860
 59. Nov 15, 04         0.00        2,715,880.79                0.00      7.2860
 60. Dec 15, 04         0.00        2,715,880.79                0.00      7.2860
 61. Jan 15, 05         0.00        2,715,880.79                0.00      7.2860
 62. Feb 15, 05         0.00        2,715,880.79                0.00      7.2860
 63. Mar 15, 05         0.00        2,715,880.79                0.00      7.2860
 64. Apr 15, 05         0.00        2,715,880.79                0.00      7.2860
 65. May 15, 05         0.00        2,715,880.79                0.00      7.2860
 66. Jun 15, 05         0.00        2,715,880.79                0.00      7.2860
 67. Jul 15, 05         0.00        2,715,880.79                0.00      7.2860
 68. Aug 15, 05         0.00        2,715,880.79                0.00      7.2860
 69. Sep 15, 05         0.00        2,715,880.79                0.00      7.2860
 70. Oct 15, 05         0.00        2,715,880.79                0.00      7.2860
</TABLE>

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<TABLE>
<S>                      <C>                 <C>                 <C>                 <C>                   <C>
 71. Nov 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 72. Dec 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 73. Jan 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 74. Feb 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 75. Mar 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 76. Apr 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 77. May 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 78. Jun 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 79. Jul 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 80. Aug 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 81. Sep 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 82. Oct 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 83. Nov 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 84. Dec 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 85. Jan 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 86. Feb 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 87. Mar 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 88. Apr 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 89. May 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 90. Jun 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 91. Jul 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 92. Aug 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 93. Sep 15, 07            2,392,493.95        2,716,813.63        5,109,307.58      444,911,506.05            932.84
 94. Oct 15, 07            1,026,394.09        2,709,511.39        3,735,905.49      443,885,111.96          8,157.03
 95. Nov 15, 07              892,336.81        2,703,111.15        3,595,447.97      442,992,775.14          7,988.72
 96. Dec 15, 07            1,152,797.75        2,697,437.88        3,850,235.63      441,839,977.39          7,733.41
 97. Jan 15, 08              899,471.92        2,690,269.44        3,589,741.36      440,940,505.48          7,564.38
 98. Feb 15, 08              903,172.49        2,684,638.18        3,587,810.67      440,037,332.98          7,394.41
 99. Mar 15, 08            1,182,048.84        2,678,982.84        3,861,031.68      438,855,284.14          7,222.83
100. Apr 15, 08              912,614.85        2,671,634.16        3,584,249.01      437,942,669.29          7,051.16

<CAPTION>
<S>                    <C>       <C>                           <C>       <C>
 71. Nov 15, 05        0.00        2,715,880.79                0.00      7.2860
 72. Dec 15, 05        0.00        2,715,880.79                0.00      7.2860
 73. Jan 15, 06        0.00        2,715,880.79                0.00      7.2860
 74. Feb 15, 06        0.00        2,715,880.79                0.00      7.2860
 75. Mar 15, 06        0.00        2,715,880.79                0.00      7.2860
 76. Apr 15, 06        0.00        2,715,880.79                0.00      7.2860
 77. May 15, 06        0.00        2,715,880.79                0.00      7.2860
 78. Jun 15, 06        0.00        2,715,880.79                0.00      7.2860
 79. Jul 15, 06        0.00        2,715,880.79                0.00      7.2860
 80. Aug 15, 06        0.00        2,715,880.79                0.00      7.2860
 81. Sep 15, 06        0.00        2,715,880.79                0.00      7.2860
 82. Oct 15, 06        0.00        2,715,880.79                0.00      7.2860
 83. Nov 15, 06        0.00        2,715,880.79                0.00      7.2860
 84. Dec 15, 06        0.00        2,715,880.79                0.00      7.2860
 85. Jan 15, 07        0.00        2,715,880.79                0.00      7.2860
 86. Feb 15, 07        0.00        2,715,880.79                0.00      7.2860
 87. Mar 15, 07        0.00        2,715,880.79                0.00      7.2860
 88. Apr 15, 07        0.00        2,715,880.79                0.00      7.2860
 89. May 15, 07        0.00        2,715,880.79                0.00      7.2860
 90. Jun 15, 07        0.00        2,715,880.79                0.00      7.2860
 91. Jul 15, 07        0.00        2,715,880.79                0.00      7.2860
 92. Aug 15, 07        0.00        2,715,880.79                0.00      7.2860
 93. Sep 15, 07        0.00        2,715,880.79                0.00      7.2860
 94. Oct 15, 07        0.00        2,701,354.36                0.00      7.2860
 95. Nov 15, 07        0.00        2,695,122.44                0.00      7.2860
 96. Dec 15, 07        0.00        2,689,704.47                0.00      7.2860
 97. Jan 15, 08        0.00        2,682,705.06                0.00      7.2860
 98. Feb 15, 08        0.00        2,677,243.77                0.00      7.2860
 99. Mar 15, 08        0.00        2,671,760.01                0.00      7.2860
100. Apr 15, 08        0.00        2,664,583.00                0.00      7.2860
</TABLE>

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<TABLE>
<S>                      <C>                 <C>                 <C>                 <C>                   <C>
101. May 15, 08            1,053,603.91        2,665,920.28        3,719,524.18      436,889,065.38          6,878.37
102. Jun 15, 08            3,593,047.99        2,659,177.44        6,252,225.43      433,296,017.40          6,532.67
103. Jul 15, 08            1,056,016.04        2,637,190.18        3,693,206.22      432,240,001.36          6,361.19
104. Aug 15, 08              924,249.71        2,630,606.55        3,554,856.26      431,315,751.65          6,189.34
105. Sep 15, 08            1,031,112.61        2,624,814.40        3,655,927.01      430,284,639.04          6,008.93
106. Oct 15, 08            1,168,491.94        2,618,367.63        3,786,859.57      429,116,147.10          5,822.73
107. Nov 15, 08            3,835,393.05        2,611,089.25        6,446,482.30      425,280,754.05          5,639.05
108. Dec 15, 08            2,756,047.72        2,587,536.88        5,343,584.60      422,524,706.33          5,373.90
109. Jan 15, 09            1,266,622.30        2,570,659.99        3,837,282.29      421,258,084.03          5,230.82
110. Feb 15, 09            1,260,687.97        2,562,844.15        3,823,532.12      419,997,396.06          5,105.49
111. Mar 15, 09            2,210,994.49        2,555,065.34        4,766,059.83      417,786,401.57          4,981.15
112. Apr 15, 09            2,054,894.14        2,541,548.03        4,596,442.17      415,731,507.43          4,888.26
113. May 15, 09            3,179,365.27        2,528,993.19        5,708,358.45      412,552,142.16          4,810.05
114. Jun 15, 09           31,709,885.12        2,509,089.12       34,218,974.24      380,842,257.04          4,210.03
115. Jul 15, 09           35,051,263.02        2,316,243.80       37,367,506.82      345,790,994.02          3,896.56
116. Aug 15, 09           31,024,215.69        2,103,356.94       33,127,572.63      314,766,778.33          3,829.29
117. Sep 15, 09          143,485,780.93        1,915,054.21      145,400,835.14      171,280,997.40          3,895.25
118. Oct 15, 09          150,121,226.24        1,043,786.94      151,165,013.18       21,159,771.16          3,825.82
119. Nov 15, 09           21,159,771.16          128,970.08       21,288,741.24                0.00            495.00

<CAPTION>
<S>                   <C>       <C>                           <C>       <C>
101. May 15, 08       0.00        2,659,041.91                0.00      7.2860
102. Jun 15, 08       0.00        2,652,644.78                0.00      7.2860
103. Jul 15, 08       0.00        2,630,828.99                0.00      7.2860
104. Aug 15, 08       0.00        2,624,417.21                0.00      7.2860
105. Sep 15, 08       0.00        2,618,805.47                0.00      7.2860
106. Oct 15, 08       0.00        2,612,544.90                0.00      7.2860
107. Nov 15, 08       0.00        2,605,450.21                0.00      7.2860
108. Dec 15, 08       0.00        2,582,162.98                0.00      7.2860
109. Jan 15, 09       0.00        2,565,429.18                0.00      7.2860
110. Feb 15, 09       0.00        2,557,738.67                0.00      7.2860
111. Mar 15, 09       0.00        2,550,084.19                0.00      7.2860
112. Apr 15, 09       0.00        2,536,659.77                0.00      7.2860
113. May 15, 09       0.00        2,524,183.14                0.00      7.2860
114. Jun 15, 09       0.00        2,504,879.09                0.00      7.2860
115. Jul 15, 09       0.00        2,312,347.24                0.00      7.2860
116. Aug 15, 09       0.00        2,099,527.65                0.00      7.2860
117. Sep 15, 09       0.00        1,911,158.96                0.00      7.2860
118. Oct 15, 09       0.00        1,039,961.12                0.00      7.2860
119. Nov 15, 09       0.00          128,475.08                0.00      7.2860
</TABLE>

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

FUNB99C4_RED, Class AAA_2

<TABLE>
<S>                 <C>                 <C>                 <C>                 <C>
CUSIP                                   Face                $447,304,000.00     Settle at Pricing
Coupon              7.286               Original Balance    $447,304,000.00     Accrual begins      12/1/99
Delay               14                  Current Balance     $447,304,000.00     Factor Date         N/A
Stated Maturity     N/A                 Factor              1
Type                SEN FIX             WAL 9.62293 yrs
YIELD CURVE:  Spread off interpolated node
3MO=5.68, 6MO=5.68, 1YR=5.68, 2YR=5.942, 5YR=6.02, 10YR=6.107, 30YR=6.208

Loan Overrides Apply
Prepay: At 25 CPR     No prepays: During any YM     Lockout and penalties: Include penalty
Default: At 0 CDR     Loss Severity: 0%     Servicer Advances: 100% of P & I     Recovery Lag: 12 mos
Extension, if balloon: None     Increase Coupon:      Pay Exten Princ:
Optional Redemption:
</TABLE>

<TABLE>
<CAPTION>
Period / Date                 Principal            Interest           Cash Flow             Balance    Prepay Penalty
<S>                      <C>                 <C>                 <C>                 <C>                   <C>
Total                    447,304,000.00      313,930,032.32      761,234,032.32                            132,346.72

  0. Dec 17, 99                    0.00                0.00                0.00      447,304,000.00              0.00
  1. Jan 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
  2. Feb 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
  3. Mar 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
  4. Apr 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
  5. May 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
  6. Jun 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
  7. Jul 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
  8. Aug 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
  9. Sep 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 10. Oct 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00

<CAPTION>
Period / Date           Princ Writedown    Accrued Interest  Interest Shortfall              Coupon
<S>                                <C>       <C>                           <C>               <C>
Total                              0.00      313,797,685.60                0.00

  0. Dec 17, 99                    0.00                0.00                0.00              0.0000
  1. Jan 15, 00                    0.00        2,715,880.79                0.00              7.2860
  2. Feb 15, 00                    0.00        2,715,880.79                0.00              7.2860
  3. Mar 15, 00                    0.00        2,715,880.79                0.00              7.2860
  4. Apr 15, 00                    0.00        2,715,880.79                0.00              7.2860
  5. May 15, 00                    0.00        2,715,880.79                0.00              7.2860
  6. Jun 15, 00                    0.00        2,715,880.79                0.00              7.2860
  7. Jul 15, 00                    0.00        2,715,880.79                0.00              7.2860
  8. Aug 15, 00                    0.00        2,715,880.79                0.00              7.2860
  9. Sep 15, 00                    0.00        2,715,880.79                0.00              7.2860
 10. Oct 15, 00                    0.00        2,715,880.79                0.00              7.2860
</TABLE>

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<TABLE>
<S>                      <C>                 <C>                 <C>                 <C>                   <C>
 11. Nov 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 12. Dec 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 13. Jan 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 14. Feb 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 15. Mar 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 16. Apr 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 17. May 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 18. Jun 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 19. Jul 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 20. Aug 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 21. Sep 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 22. Oct 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 23. Nov 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 24. Dec 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 25. Jan 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 26. Feb 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 27. Mar 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 28. Apr 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 29. May 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 30. Jun 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 31. Jul 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 32. Aug 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 33. Sep 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 34. Oct 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 35. Nov 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 36. Dec 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 37. Jan 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 38. Feb 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 39. Mar 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 40. Apr 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00

<CAPTION>
<S>                     <C>       <C>                           <C>       <C>
 11. Nov 15, 00         0.00        2,715,880.79                0.00      7.2860
 12. Dec 15, 00         0.00        2,715,880.79                0.00      7.2860
 13. Jan 15, 01         0.00        2,715,880.79                0.00      7.2860
 14. Feb 15, 01         0.00        2,715,880.79                0.00      7.2860
 15. Mar 15, 01         0.00        2,715,880.79                0.00      7.2860
 16. Apr 15, 01         0.00        2,715,880.79                0.00      7.2860
 17. May 15, 01         0.00        2,715,880.79                0.00      7.2860
 18. Jun 15, 01         0.00        2,715,880.79                0.00      7.2860
 19. Jul 15, 01         0.00        2,715,880.79                0.00      7.2860
 20. Aug 15, 01         0.00        2,715,880.79                0.00      7.2860
 21. Sep 15, 01         0.00        2,715,880.79                0.00      7.2860
 22. Oct 15, 01         0.00        2,715,880.79                0.00      7.2860
 23. Nov 15, 01         0.00        2,715,880.79                0.00      7.2860
 24. Dec 15, 01         0.00        2,715,880.79                0.00      7.2860
 25. Jan 15, 02         0.00        2,715,880.79                0.00      7.2860
 26. Feb 15, 02         0.00        2,715,880.79                0.00      7.2860
 27. Mar 15, 02         0.00        2,715,880.79                0.00      7.2860
 28. Apr 15, 02         0.00        2,715,880.79                0.00      7.2860
 29. May 15, 02         0.00        2,715,880.79                0.00      7.2860
 30. Jun 15, 02         0.00        2,715,880.79                0.00      7.2860
 31. Jul 15, 02         0.00        2,715,880.79                0.00      7.2860
 32. Aug 15, 02         0.00        2,715,880.79                0.00      7.2860
 33. Sep 15, 02         0.00        2,715,880.79                0.00      7.2860
 34. Oct 15, 02         0.00        2,715,880.79                0.00      7.2860
 35. Nov 15, 02         0.00        2,715,880.79                0.00      7.2860
 36. Dec 15, 02         0.00        2,715,880.79                0.00      7.2860
 37. Jan 15, 03         0.00        2,715,880.79                0.00      7.2860
 38. Feb 15, 03         0.00        2,715,880.79                0.00      7.2860
 39. Mar 15, 03         0.00        2,715,880.79                0.00      7.2860
 40. Apr 15, 03         0.00        2,715,880.79                0.00      7.2860
</TABLE>

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<TABLE>
<S>                      <C>                 <C>                 <C>                 <C>                   <C>
 41. May 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 42. Jun 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 43. Jul 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 44. Aug 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 45. Sep 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 46. Oct 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 47. Nov 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 48. Dec 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 49. Jan 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 50. Feb 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 51. Mar 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 52. Apr 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 53. May 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 54. Jun 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 55. Jul 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 56. Aug 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 57. Sep 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 58. Oct 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 59. Nov 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 60. Dec 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 61. Jan 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 62. Feb 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 63. Mar 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 64. Apr 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 65. May 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 66. Jun 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 67. Jul 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 68. Aug 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 69. Sep 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 70. Oct 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00

<CAPTION>
<S>                     <C>       <C>                           <C>       <C>
 41. May 15, 03         0.00        2,715,880.79                0.00      7.2860
 42. Jun 15, 03         0.00        2,715,880.79                0.00      7.2860
 43. Jul 15, 03         0.00        2,715,880.79                0.00      7.2860
 44. Aug 15, 03         0.00        2,715,880.79                0.00      7.2860
 45. Sep 15, 03         0.00        2,715,880.79                0.00      7.2860
 46. Oct 15, 03         0.00        2,715,880.79                0.00      7.2860
 47. Nov 15, 03         0.00        2,715,880.79                0.00      7.2860
 48. Dec 15, 03         0.00        2,715,880.79                0.00      7.2860
 49. Jan 15, 04         0.00        2,715,880.79                0.00      7.2860
 50. Feb 15, 04         0.00        2,715,880.79                0.00      7.2860
 51. Mar 15, 04         0.00        2,715,880.79                0.00      7.2860
 52. Apr 15, 04         0.00        2,715,880.79                0.00      7.2860
 53. May 15, 04         0.00        2,715,880.79                0.00      7.2860
 54. Jun 15, 04         0.00        2,715,880.79                0.00      7.2860
 55. Jul 15, 04         0.00        2,715,880.79                0.00      7.2860
 56. Aug 15, 04         0.00        2,715,880.79                0.00      7.2860
 57. Sep 15, 04         0.00        2,715,880.79                0.00      7.2860
 58. Oct 15, 04         0.00        2,715,880.79                0.00      7.2860
 59. Nov 15, 04         0.00        2,715,880.79                0.00      7.2860
 60. Dec 15, 04         0.00        2,715,880.79                0.00      7.2860
 61. Jan 15, 05         0.00        2,715,880.79                0.00      7.2860
 62. Feb 15, 05         0.00        2,715,880.79                0.00      7.2860
 63. Mar 15, 05         0.00        2,715,880.79                0.00      7.2860
 64. Apr 15, 05         0.00        2,715,880.79                0.00      7.2860
 65. May 15, 05         0.00        2,715,880.79                0.00      7.2860
 66. Jun 15, 05         0.00        2,715,880.79                0.00      7.2860
 67. Jul 15, 05         0.00        2,715,880.79                0.00      7.2860
 68. Aug 15, 05         0.00        2,715,880.79                0.00      7.2860
 69. Sep 15, 05         0.00        2,715,880.79                0.00      7.2860
 70. Oct 15, 05         0.00        2,715,880.79                0.00      7.2860
</TABLE>

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<TABLE>
<S>                      <C>                 <C>                 <C>                 <C>                   <C>
 71. Nov 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 72. Dec 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 73. Jan 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 74. Feb 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 75. Mar 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 76. Apr 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 77. May 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 78. Jun 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 79. Jul 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 80. Aug 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 81. Sep 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 82. Oct 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 83. Nov 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 84. Dec 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 85. Jan 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 86. Feb 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 87. Mar 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 88. Apr 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 89. May 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 90. Jun 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 91. Jul 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 92. Aug 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 93. Sep 15, 07           11,153,441.48        2,720,222.58       13,873,664.07      436,150,558.52          4,341.80
 94. Oct 15, 07            1,034,531.10        2,656,217.68        3,690,748.77      435,116,027.42          8,056.87
 95. Nov 15, 07              899,429.95        2,649,680.81        3,549,110.75      434,216,597.47          7,801.33
 96. Dec 15, 07            1,087,598.16        2,643,891.15        3,731,489.31      433,128,999.31          7,472.71
 97. Jan 15, 08              903,114.05        2,637,039.38        3,540,153.43      432,225,885.26          7,224.47
 98. Feb 15, 08              905,106.71        2,631,310.49        3,536,417.20      431,320,778.55          6,978.99
 99. Mar 15, 08            1,180,640.69        2,625,571.45        3,806,212.14      430,140,137.87          6,735.46
100. Apr 15, 08              911,255.10        2,618,163.18        3,529,418.29      429,228,882.77          6,495.65

<CAPTION>
<S>                      <C>       <C>                           <C>       <C>
 71. Nov 15, 05          0.00        2,715,880.79                0.00      7.2860
 72. Dec 15, 05          0.00        2,715,880.79                0.00      7.2860
 73. Jan 15, 06          0.00        2,715,880.79                0.00      7.2860
 74. Feb 15, 06          0.00        2,715,880.79                0.00      7.2860
 75. Mar 15, 06          0.00        2,715,880.79                0.00      7.2860
 76. Apr 15, 06          0.00        2,715,880.79                0.00      7.2860
 77. May 15, 06          0.00        2,715,880.79                0.00      7.2860
 78. Jun 15, 06          0.00        2,715,880.79                0.00      7.2860
 79. Jul 15, 06          0.00        2,715,880.79                0.00      7.2860
 80. Aug 15, 06          0.00        2,715,880.79                0.00      7.2860
 81. Sep 15, 06          0.00        2,715,880.79                0.00      7.2860
 82. Oct 15, 06          0.00        2,715,880.79                0.00      7.2860
 83. Nov 15, 06          0.00        2,715,880.79                0.00      7.2860
 84. Dec 15, 06          0.00        2,715,880.79                0.00      7.2860
 85. Jan 15, 07          0.00        2,715,880.79                0.00      7.2860
 86. Feb 15, 07          0.00        2,715,880.79                0.00      7.2860
 87. Mar 15, 07          0.00        2,715,880.79                0.00      7.2860
 88. Apr 15, 07          0.00        2,715,880.79                0.00      7.2860
 89. May 15, 07          0.00        2,715,880.79                0.00      7.2860
 90. Jun 15, 07          0.00        2,715,880.79                0.00      7.2860
 91. Jul 15, 07          0.00        2,715,880.79                0.00      7.2860
 92. Aug 15, 07          0.00        2,715,880.79                0.00      7.2860
 93. Sep 15, 07          0.00        2,715,880.79                0.00      7.2860
 94. Oct 15, 07          0.00        2,648,160.81                0.00      7.2860
 95. Nov 15, 07          0.00        2,641,879.48                0.00      7.2860
 96. Dec 15, 07          0.00        2,636,418.44                0.00      7.2860
 97. Jan 15, 08          0.00        2,629,814.91                0.00      7.2860
 98. Feb 15, 08          0.00        2,624,331.50                0.00      7.2860
 99. Mar 15, 08          0.00        2,618,835.99                0.00      7.2860
100. Apr 15, 08          0.00        2,611,667.54                0.00      7.2860
</TABLE>

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<TABLE>
<S>                      <C>                 <C>                 <C>                 <C>                   <C>
101. May 15, 08            1,049,829.49        2,612,393.04        3,662,222.53      428,179,053.28          6,258.34
102. Jun 15, 08            3,436,566.24        2,605,641.72        6,042,207.97      424,742,487.03          5,881.24
103. Jul 15, 08            1,049,608.06        2,584,548.27        3,634,156.34      423,692,878.97          5,653.47
104. Aug 15, 08              917,251.30        2,577,950.88        3,495,202.17      422,775,627.67          5,428.94
105. Sep 15, 08            1,022,725.75        2,572,150.65        3,594,876.40      421,752,901.93          5,197.97
106. Oct 15, 08            1,157,907.91        2,565,707.94        3,723,615.84      420,594,994.02          4,964.90
107. Nov 15, 08            3,824,340.04        2,558,451.05        6,382,791.10      416,770,653.98          4,738.45
108. Dec 15, 08            2,663,148.89        2,534,945.16        5,198,094.05      414,107,505.08          4,452.67
109. Jan 15, 09            1,253,303.64        2,518,602.35        3,771,905.99      412,854,201.44          4,279.61
110. Feb 15, 09            1,246,176.46        2,510,842.24        3,757,018.70      411,608,024.99          4,129.15
111. Mar 15, 09            2,192,781.30        2,503,128.75        4,695,910.05      409,415,243.69          3,982.03
112. Apr 15, 09            2,038,083.41        2,489,700.99        4,527,784.40      407,377,160.28          3,868.10
113. May 15, 09            3,160,619.06        2,477,228.44        5,637,847.49      404,216,541.22          3,770.11
114. Jun 15, 09           31,540,694.22        2,457,427.28       33,998,121.51      372,675,847.00          3,159.19
115. Jul 15, 09           35,030,975.14        2,265,608.56       37,296,583.70      337,644,871.86          2,845.04
116. Aug 15, 09           28,900,142.82        2,052,835.73       30,952,978.55      308,744,729.04          2,768.62
117. Sep 15, 09          141,519,218.82        1,877,421.55      143,396,640.37      167,225,510.22          2,826.47
118. Oct 15, 09          150,105,678.10        1,018,087.52      151,123,765.62       17,119,832.11          2,749.96
119. Nov 15, 09           17,119,832.11          104,231.10       17,224,063.22                0.00            285.19

<CAPTION>
<S>                   <C>       <C>                           <C>       <C>
101. May 15, 08       0.00        2,606,134.70                0.00      7.2860
102. Jun 15, 08       0.00        2,599,760.49                0.00      7.2860
103. Jul 15, 08       0.00        2,578,894.80                0.00      7.2860
104. Aug 15, 08       0.00        2,572,521.93                0.00      7.2860
105. Sep 15, 08       0.00        2,566,952.69                0.00      7.2860
106. Oct 15, 08       0.00        2,560,743.04                0.00      7.2860
107. Nov 15, 08       0.00        2,553,712.61                0.00      7.2860
108. Dec 15, 08       0.00        2,530,492.49                0.00      7.2860
109. Jan 15, 09       0.00        2,514,322.74                0.00      7.2860
110. Feb 15, 09       0.00        2,506,713.09                0.00      7.2860
111. Mar 15, 09       0.00        2,499,146.73                0.00      7.2860
112. Apr 15, 09       0.00        2,485,832.89                0.00      7.2860
113. May 15, 09       0.00        2,473,458.32                0.00      7.2860
114. Jun 15, 09       0.00        2,454,268.10                0.00      7.2860
115. Jul 15, 09       0.00        2,262,763.52                0.00      7.2860
116. Aug 15, 09       0.00        2,050,067.11                0.00      7.2860
117. Sep 15, 09       0.00        1,874,595.08                0.00      7.2860
118. Oct 15, 09       0.00        1,015,337.56                0.00      7.2860
119. Nov 15, 09       0.00          103,945.91                0.00      7.2860
</TABLE>

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

FUNB99C4_RED, Class AAA_2

<TABLE>
<S>                 <C>                 <C>                 <C>                 <C>
CUSIP                                   Face                $447,304,000.00     Settle at Pricing
Coupon              7.286               Original Balance    $447,304,000.00     Accrual begins      12/1/99
Delay               14                  Current Balance     $447,304,000.00     Factor Date         N/A
Stated Maturity     N/A                 Factor              1
Type                SEN FIX             WAL 9.62293 yrs
YIELD CURVE:  Spread off interpolated node
3MO=5.68, 6MO=5.68, 1YR=5.68, 2YR=5.942, 5YR=6.02, 10YR=6.107, 30YR=6.208

Loan Overrides Apply
Prepay: At 25 CPR     No prepays: During any YM     Lockout and penalties: Include penalty
Default: At 0 CDR     Loss Severity: 0%     Servicer Advances: 100% of P & I     Recovery Lag: 12 mos
Extension, if balloon: None     Increase Coupon:      Pay Exten Princ:
Optional Redemption:
shock=-100 bp
</TABLE>

<TABLE>
<CAPTION>
Period / Date                 Principal            Interest           Cash Flow             Balance    Prepay Penalty
<S>                      <C>                 <C>                 <C>                 <C>                   <C>
Total                    447,304,000.00      314,035,034.27      761,339,034.27                            237,348.66

  0. Dec 17, 99                    0.00                0.00                0.00      447,304,000.00              0.00
  1. Jan 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
  2. Feb 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
  3. Mar 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
  4. Apr 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
  5. May 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
  6. Jun 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
  7. Jul 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
  8. Aug 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
  9. Sep 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00

<CAPTION>
Period / Date           Princ Writedown    Accrued Interest  Interest Shortfall      Coupon
<S>                                <C>       <C>                           <C>       <C>
Total                              0.00      313,797,685.60                0.00

  0. Dec 17, 99                    0.00                0.00                0.00      0.0000
  1. Jan 15, 00                    0.00        2,715,880.79                0.00      7.2860
  2. Feb 15, 00                    0.00        2,715,880.79                0.00      7.2860
  3. Mar 15, 00                    0.00        2,715,880.79                0.00      7.2860
  4. Apr 15, 00                    0.00        2,715,880.79                0.00      7.2860
  5. May 15, 00                    0.00        2,715,880.79                0.00      7.2860
  6. Jun 15, 00                    0.00        2,715,880.79                0.00      7.2860
  7. Jul 15, 00                    0.00        2,715,880.79                0.00      7.2860
  8. Aug 15, 00                    0.00        2,715,880.79                0.00      7.2860
  9. Sep 15, 00                    0.00        2,715,880.79                0.00      7.2860
</TABLE>

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<TABLE>
<S>                      <C>                 <C>                 <C>                 <C>                   <C>
 10. Oct 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 11. Nov 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 12. Dec 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 13. Jan 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 14. Feb 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 15. Mar 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 16. Apr 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 17. May 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 18. Jun 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 19. Jul 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 20. Aug 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 21. Sep 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 22. Oct 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 23. Nov 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 24. Dec 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 25. Jan 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 26. Feb 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 27. Mar 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 28. Apr 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 29. May 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 30. Jun 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 31. Jul 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 32. Aug 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 33. Sep 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 34. Oct 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 35. Nov 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 36. Dec 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 37. Jan 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 38. Feb 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 39. Mar 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00

<CAPTION>
<S>                      <C>       <C>                           <C>       <C>
 10. Oct 15, 00          0.00        2,715,880.79                0.00      7.2860
 11. Nov 15, 00          0.00        2,715,880.79                0.00      7.2860
 12. Dec 15, 00          0.00        2,715,880.79                0.00      7.2860
 13. Jan 15, 01          0.00        2,715,880.79                0.00      7.2860
 14. Feb 15, 01          0.00        2,715,880.79                0.00      7.2860
 15. Mar 15, 01          0.00        2,715,880.79                0.00      7.2860
 16. Apr 15, 01          0.00        2,715,880.79                0.00      7.2860
 17. May 15, 01          0.00        2,715,880.79                0.00      7.2860
 18. Jun 15, 01          0.00        2,715,880.79                0.00      7.2860
 19. Jul 15, 01          0.00        2,715,880.79                0.00      7.2860
 20. Aug 15, 01          0.00        2,715,880.79                0.00      7.2860
 21. Sep 15, 01          0.00        2,715,880.79                0.00      7.2860
 22. Oct 15, 01          0.00        2,715,880.79                0.00      7.2860
 23. Nov 15, 01          0.00        2,715,880.79                0.00      7.2860
 24. Dec 15, 01          0.00        2,715,880.79                0.00      7.2860
 25. Jan 15, 02          0.00        2,715,880.79                0.00      7.2860
 26. Feb 15, 02          0.00        2,715,880.79                0.00      7.2860
 27. Mar 15, 02          0.00        2,715,880.79                0.00      7.2860
 28. Apr 15, 02          0.00        2,715,880.79                0.00      7.2860
 29. May 15, 02          0.00        2,715,880.79                0.00      7.2860
 30. Jun 15, 02          0.00        2,715,880.79                0.00      7.2860
 31. Jul 15, 02          0.00        2,715,880.79                0.00      7.2860
 32. Aug 15, 02          0.00        2,715,880.79                0.00      7.2860
 33. Sep 15, 02          0.00        2,715,880.79                0.00      7.2860
 34. Oct 15, 02          0.00        2,715,880.79                0.00      7.2860
 35. Nov 15, 02          0.00        2,715,880.79                0.00      7.2860
 36. Dec 15, 02          0.00        2,715,880.79                0.00      7.2860
 37. Jan 15, 03          0.00        2,715,880.79                0.00      7.2860
 38. Feb 15, 03          0.00        2,715,880.79                0.00      7.2860
 39. Mar 15, 03          0.00        2,715,880.79                0.00      7.2860
</TABLE>

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<TABLE>
<S>                      <C>                 <C>                 <C>                 <C>                   <C>
 40. Apr 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 41. May 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 42. Jun 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 43. Jul 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 44. Aug 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 45. Sep 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 46. Oct 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 47. Nov 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 48. Dec 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 49. Jan 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 50. Feb 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 51. Mar 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 52. Apr 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 53. May 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 54. Jun 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 55. Jul 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 56. Aug 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 57. Sep 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 58. Oct 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 59. Nov 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 60. Dec 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 61. Jan 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 62. Feb 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 63. Mar 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 64. Apr 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 65. May 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 66. Jun 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 67. Jul 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 68. Aug 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 69. Sep 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00

<CAPTION>
<S>                     <C>       <C>                           <C>       <C>
 40. Apr 15, 03         0.00        2,715,880.79                0.00      7.2860
 41. May 15, 03         0.00        2,715,880.79                0.00      7.2860
 42. Jun 15, 03         0.00        2,715,880.79                0.00      7.2860
 43. Jul 15, 03         0.00        2,715,880.79                0.00      7.2860
 44. Aug 15, 03         0.00        2,715,880.79                0.00      7.2860
 45. Sep 15, 03         0.00        2,715,880.79                0.00      7.2860
 46. Oct 15, 03         0.00        2,715,880.79                0.00      7.2860
 47. Nov 15, 03         0.00        2,715,880.79                0.00      7.2860
 48. Dec 15, 03         0.00        2,715,880.79                0.00      7.2860
 49. Jan 15, 04         0.00        2,715,880.79                0.00      7.2860
 50. Feb 15, 04         0.00        2,715,880.79                0.00      7.2860
 51. Mar 15, 04         0.00        2,715,880.79                0.00      7.2860
 52. Apr 15, 04         0.00        2,715,880.79                0.00      7.2860
 53. May 15, 04         0.00        2,715,880.79                0.00      7.2860
 54. Jun 15, 04         0.00        2,715,880.79                0.00      7.2860
 55. Jul 15, 04         0.00        2,715,880.79                0.00      7.2860
 56. Aug 15, 04         0.00        2,715,880.79                0.00      7.2860
 57. Sep 15, 04         0.00        2,715,880.79                0.00      7.2860
 58. Oct 15, 04         0.00        2,715,880.79                0.00      7.2860
 59. Nov 15, 04         0.00        2,715,880.79                0.00      7.2860
 60. Dec 15, 04         0.00        2,715,880.79                0.00      7.2860
 61. Jan 15, 05         0.00        2,715,880.79                0.00      7.2860
 62. Feb 15, 05         0.00        2,715,880.79                0.00      7.2860
 63. Mar 15, 05         0.00        2,715,880.79                0.00      7.2860
 64. Apr 15, 05         0.00        2,715,880.79                0.00      7.2860
 65. May 15, 05         0.00        2,715,880.79                0.00      7.2860
 66. Jun 15, 05         0.00        2,715,880.79                0.00      7.2860
 67. Jul 15, 05         0.00        2,715,880.79                0.00      7.2860
 68. Aug 15, 05         0.00        2,715,880.79                0.00      7.2860
 69. Sep 15, 05         0.00        2,715,880.79                0.00      7.2860
</TABLE>

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<TABLE>
<S>                      <C>                 <C>                 <C>                 <C>                   <C>
 70. Oct 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 71. Nov 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 72. Dec 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 73. Jan 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 74. Feb 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 75. Mar 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 76. Apr 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 77. May 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 78. Jun 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 79. Jul 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 80. Aug 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 81. Sep 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 82. Oct 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 83. Nov 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 84. Dec 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 85. Jan 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 86. Feb 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 87. Mar 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 88. Apr 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 89. May 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 90. Jun 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 91. Jul 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 92. Aug 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
 93. Sep 15, 07           11,153,441.48        2,723,788.63       13,877,230.11      436,150,558.52          7,907.84
 94. Oct 15, 07            1,034,531.10        2,662,801.79        3,697,332.89      435,116,027.42         14,640.98
 95. Nov 15, 07              899,429.95        2,656,025.97        3,555,455.92      434,216,597.47         14,146.49
 96. Dec 15, 07            1,087,598.16        2,649,938.14        3,737,536.31      433,128,999.31         13,519.70
 97. Jan 15, 08              903,114.05        2,642,861.52        3,545,975.57      432,225,885.26         13,046.62
 98. Feb 15, 08              905,106.71        2,636,913.72        3,542,020.43      431,320,778.55         12,582.22
 99. Mar 15, 08            1,180,640.69        2,630,961.04        3,811,601.73      430,140,137.87         12,125.05

<CAPTION>
<S>                     <C>       <C>                           <C>       <C>
 70. Oct 15, 05         0.00        2,715,880.79                0.00      7.2860
 71. Nov 15, 05         0.00        2,715,880.79                0.00      7.2860
 72. Dec 15, 05         0.00        2,715,880.79                0.00      7.2860
 73. Jan 15, 06         0.00        2,715,880.79                0.00      7.2860
 74. Feb 15, 06         0.00        2,715,880.79                0.00      7.2860
 75. Mar 15, 06         0.00        2,715,880.79                0.00      7.2860
 76. Apr 15, 06         0.00        2,715,880.79                0.00      7.2860
 77. May 15, 06         0.00        2,715,880.79                0.00      7.2860
 78. Jun 15, 06         0.00        2,715,880.79                0.00      7.2860
 79. Jul 15, 06         0.00        2,715,880.79                0.00      7.2860
 80. Aug 15, 06         0.00        2,715,880.79                0.00      7.2860
 81. Sep 15, 06         0.00        2,715,880.79                0.00      7.2860
 82. Oct 15, 06         0.00        2,715,880.79                0.00      7.2860
 83. Nov 15, 06         0.00        2,715,880.79                0.00      7.2860
 84. Dec 15, 06         0.00        2,715,880.79                0.00      7.2860
 85. Jan 15, 07         0.00        2,715,880.79                0.00      7.2860
 86. Feb 15, 07         0.00        2,715,880.79                0.00      7.2860
 87. Mar 15, 07         0.00        2,715,880.79                0.00      7.2860
 88. Apr 15, 07         0.00        2,715,880.79                0.00      7.2860
 89. May 15, 07         0.00        2,715,880.79                0.00      7.2860
 90. Jun 15, 07         0.00        2,715,880.79                0.00      7.2860
 91. Jul 15, 07         0.00        2,715,880.79                0.00      7.2860
 92. Aug 15, 07         0.00        2,715,880.79                0.00      7.2860
 93. Sep 15, 07         0.00        2,715,880.79                0.00      7.2860
 94. Oct 15, 07         0.00        2,648,160.81                0.00      7.2860
 95. Nov 15, 07         0.00        2,641,879.48                0.00      7.2860
 96. Dec 15, 07         0.00        2,636,418.44                0.00      7.2860
 97. Jan 15, 08         0.00        2,629,814.91                0.00      7.2860
 98. Feb 15, 08         0.00        2,624,331.50                0.00      7.2860
 99. Mar 15, 08         0.00        2,618,835.99                0.00      7.2860
</TABLE>

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<TABLE>
<S>                      <C>                 <C>                 <C>                 <C>                   <C>
100. Apr 15, 08              911,255.10        2,623,345.40        3,534,600.50      429,228,882.77         11,677.86
101. May 15, 08            1,049,829.49        2,617,373.22        3,667,202.70      428,179,053.28         11,238.52
102. Jun 15, 08            3,436,566.24        2,610,303.09        6,046,869.34      424,742,487.03         10,542.61
103. Jul 15, 08            1,049,608.06        2,589,021.74        3,638,629.80      423,692,878.97         10,126.94
104. Aug 15, 08              917,251.30        2,582,241.78        3,499,493.07      422,775,627.67          9,719.85
105. Sep 15, 08            1,022,725.75        2,576,263.88        3,598,989.63      421,752,901.93          9,311.20
106. Oct 15, 08            1,157,907.91        2,569,648.20        3,727,556.11      420,594,994.02          8,905.16
107. Nov 15, 08            3,824,340.04        2,562,223.38        6,386,563.42      416,770,653.98          8,510.77
108. Dec 15, 08            2,663,148.89        2,538,498.86        5,201,647.75      414,107,505.08          8,006.37
109. Jan 15, 09            1,253,303.64        2,521,959.64        3,775,263.28      412,854,201.44          7,636.90
110. Feb 15, 09            1,246,176.46        2,513,990.89        3,760,167.35      411,608,024.99          7,277.80
111. Mar 15, 09            2,192,781.30        2,506,075.01        4,698,856.31      409,415,243.69          6,928.28
112. Apr 15, 09            2,038,083.41        2,492,486.16        4,530,569.56      407,377,160.28          6,653.27
113. May 15, 09            3,160,619.06        2,479,868.78        5,640,487.84      404,216,541.22          6,410.46
114. Jun 15, 09           31,540,694.22        2,459,895.16       34,000,589.38      372,675,847.00          5,627.06
115. Jul 15, 09           35,030,975.14        2,267,985.68       37,298,960.82      337,644,871.86          5,222.16
116. Aug 15, 09           28,900,142.82        2,055,144.71       30,955,287.53      308,744,729.04          5,077.59
117. Sep 15, 09          141,519,218.82        1,879,664.00      143,398,882.83      167,225,510.22          5,068.92
118. Oct 15, 09          150,105,678.10        1,020,265.03      151,125,943.13       17,119,832.11          4,927.47
119. Nov 15, 09           17,119,832.11          104,456.48       17,224,288.60                0.00            510.57

<CAPTION>
<S>                   <C>       <C>                           <C>       <C>
100. Apr 15, 08       0.00        2,611,667.54                0.00      7.2860
101. May 15, 08       0.00        2,606,134.70                0.00      7.2860
102. Jun 15, 08       0.00        2,599,760.49                0.00      7.2860
103. Jul 15, 08       0.00        2,578,894.80                0.00      7.2860
104. Aug 15, 08       0.00        2,572,521.93                0.00      7.2860
105. Sep 15, 08       0.00        2,566,952.69                0.00      7.2860
106. Oct 15, 08       0.00        2,560,743.04                0.00      7.2860
107. Nov 15, 08       0.00        2,553,712.61                0.00      7.2860
108. Dec 15, 08       0.00        2,530,492.49                0.00      7.2860
109. Jan 15, 09       0.00        2,514,322.74                0.00      7.2860
110. Feb 15, 09       0.00        2,506,713.09                0.00      7.2860
111. Mar 15, 09       0.00        2,499,146.73                0.00      7.2860
112. Apr 15, 09       0.00        2,485,832.89                0.00      7.2860
113. May 15, 09       0.00        2,473,458.32                0.00      7.2860
114. Jun 15, 09       0.00        2,454,268.10                0.00      7.2860
115. Jul 15, 09       0.00        2,262,763.52                0.00      7.2860
116. Aug 15, 09       0.00        2,050,067.11                0.00      7.2860
117. Sep 15, 09       0.00        1,874,595.08                0.00      7.2860
118. Oct 15, 09       0.00        1,015,337.56                0.00      7.2860
119. Nov 15, 09       0.00          103,945.91                0.00      7.2860
</TABLE>
<PAGE>

FUNB99C4_RED, Class AAA_2--Price/Yield

<TABLE>
- ----------------------------------------------------------------------------------------------------
<S>                <C>        <C>               <C>               <C>                    <C>
CUSIP                         Face              $447,304,000.00   Settle at Pricing
Coupon              7.286     Original Balance  $447,304,000.00   Accrual begins         12/1/1999
Delay                14       Current Balance   $447,304,000.00   Factor Date                N/A
Stated Maturity      N/A      Factor                   1          ----------------------------------
Type               SEN FIX    ----------------------------------
- ------------------------------
</TABLE>

YIELD CURVE:  Spread off interpolated node
3MO=5.68, 6MO=5.68, 1YR=5.68, 2YR=5.942, 5YR=6.02, 10YR=6.107, 30YR=6.208

- --------------------------------------------------------------------------------
                                               10 CPR FOR YM    10 CPR FOR YM
                                              LOANS, OTHER 25  LOANS, OTHER 25
            PRICE              0 CPR               CPR         CPR, RATES -100
                               Yield
- --------------------------------------------------------------------------------
            100-08            7.3210              7.3209            7.3230
            100-09            7.3164              7.3163            7.3184
            100-10            7.3118              7.3117            7.3138
            100-11            7.3071              7.3071            7.3092
            100-12            7.3025              7.3025            7.3046
            100-13            7.2979              7.2978            7.3000
            100-14            7.2933              7.2932            7.2953
            100-15            7.2887              7.2886            7.2907
            100-16            7.2841              7.2840            7.2861
            100-17            7.2795              7.2794            7.2815
            100-18            7.2749              7.2748            7.2769
            100-19            7.2703              7.2702            7.2723
            100-20            7.2657              7.2656            7.2677
            100-21            7.2611              7.2610            7.2631
            100-22            7.2565              7.2564            7.2585
            100-23            7.2519              7.2518            7.2539
            100-24            7.2473              7.2472            7.2493
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
Spread @ Center Price           118                118                219
                  WAL         9.67314            9.66214            9.66214
             Mod Durn          6.732              6.727              6.727
        Mod Convexity          0.588              0.587              0.587
     Principal Window     Sep07 to Nov09      Sep07 to Nov09    Sep07 to Nov09
        Maturity #mos           119                119                119
     Accrued Interest      1,448,469.75        1,448,469.75      1,448,469.75
    Total Collat Loss      0.00 (0.00%)        0.00 (0.00%)      0.00 (0.00%)

 Loan Overrides Apply

               Prepay        At 0 CPR           At 25 CPR          At 25 CPR
           No prepays      During any YM      During any YM      During any YM
Lockout and penalties     Include penalty    Include penalty    Include penalty

Extension, if balloon          None                None              None
      Increase Coupon
      Pay Exten Princ

              Default        At 0 CDR            At 0 CDR          At 0 CDR
        Loss Severity            0                  0                  0
    Servicer Advances      100% of P & I      100% of P & I      100% of P & I
         Recovery Lag         12 mos              12 mos            12 mos
- --------------------------------------------------------------------------------

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<PAGE>

FUNB99C4_RED, Class AAA_2--Price/Yield

<TABLE>
- ----------------------------------------------------------------------------------------------------
<S>                <C>        <C>               <C>               <C>                    <C>
CUSIP                          Face             $447,304,000.00   Settle at Pricing
Coupon              7.286      Original Balance $447,304,000.00   Accrual begins         12/1/1999
Delay                14        Current Balance  $447,304,000.00   Factor Date               N/A
Stated Maturity      N/A       Factor                  1          ----------------------------------
Type               SEN FIX     -----------------------------------
- -------------------------------
</TABLE>

YIELD CURVE: Spread off interpolated node
3MO=5.68, 6MO=5.68, 1YR=5.68, 2YR=5.942, 5YR=6.02, 10YR=6.107, 30YR=6.208

- --------------------------------------------------------------------------------
                                            20 CPR FOR YM        20 CPR FOR YM
                                           LOANS, OTHER 25     LOANS, OTHER 25
            PRICE            0 CPR               CPR            CPR, RATES -100
                             YIELD
- --------------------------------------------------------------------------------
            100-08          7.3205             7.3204              7.3223
            100-09          7.3159             7.3158              7.3177
            100-10          7.3112             7.3112              7.3130
            100-11          7.3066             7.3065              7.3084
            100-12          7.3020             7.3019              7.3038
            100-13          7.2974             7.2973              7.2992
            100-14          7.2927             7.2927              7.2945
            100-15          7.2881             7.2880              7.2899
            100-16          7.2835             7.2834              7.2853
            100-17          7.2789             7.2788              7.2807
            100-18          7.2743             7.2742              7.2760
            100-19          7.2696             7.2695              7.2714
            100-20          7.2650             7.2649              7.2668
            100-21          7.2604             7.2603              7.2622
            100-22          7.2558             7.2557              7.2576
            100-23          7.2512             7.2511              7.2530
            100-24          7.2466             7.2465              7.2484
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
Spread @ Center Price         118               118                  218
                  WAL       9.63393           9.62293              9.62293
             Mod Durn        6.712             6.706                6.706
        Mod Convexity        0.585             0.584                0.584
     Principal Window   Sep07 to Nov09     Sep07 to Nov09      Sep07 to Nov09
        Maturity #mos         119               119                  119
     Accrued Interest    1,448,469.75       1,448,469.75        1,448,469.75
    Total Collat Loss    0.00 (0.00%)       0.00 (0.00%)        0.00 (0.00%)

 Loan Overrides Apply

               Prepay      At 0 CPR          At 25 CPR            At 25 CPR
           No prepays    During any YM     During any YM        During any YM
Lockout and penalties   Include penalty   Include penalty      Include penalty

Extension, if balloon        None               None                None
      Increase Coupon
      Pay Exten Princ

              Default      At 0 CDR           At 0 CDR            At 0 CDR
        Loss Severity          0                 0                    0
    Servicer Advances    100% of P & I     100% of P & I        100% of P & I
         Recovery Lag       12 mos             12 mos              12 mos
- --------------------------------------------------------------------------------

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<PAGE>

FUNB99C4_RED, Class X1--Price/Yield

<TABLE>
- ---------------------------------------------------------------------------------------------------
<S>                <C>        <C>               <C>               <C>                    <C>
CUSIP                         Face              $885,836,326.34   Settle at Pricing
Coupon              0.943626  Original Balance  $885,836,326.34   Accrual begins         12/1/1999
Delay                  14     Current Balance   $885,836,326.34   Factor Date               N/A
Stated Maturity        N/A    Factor                   1          ---------------------------------
Type               SEN WAC IO ------------------------------------
- ------------------------------
</TABLE>

YIELD CURVE:  Spread off interpolated node
3MO=5.68, 6MO=5.68, 1YR=5.68, 2YR=5.942, 5YR=6.02, 10YR=6.107, 30YR=6.208

<TABLE>
<CAPTION>
- ----------------------------------------------------------------------------------------------------------------------------------
                              100CPR; YM;        0CPR; YM;         100CPR; YM;           100CPR; YM;             100CPR; YM;
                              EXT0MO 100%       EXT0MO 100%        EXT0MO 100%           EXT0MO 100%             EXT0MO 100%
                               0% RULES;         0% RULES;          0% RULES;             0% RULES;               0% RULES;
                                0CDR,0%           0CDR,0%         0 FOR 24 3CDR,        0 FOR 24 1CDR,          0 FOR 24 2CDR,
              PRICE          ADV100% LAG12     ADV100% LAG12    35% ADV100% LAG12     35% ADV100% LAG12       35% ADV100% LAG12
                                Yield
- ----------------------------------------------------------------------------------------------------------------------------------
<S>                             <C>              <C>                 <C>                   <C>                    <C>
                4-16            10.6711          11.0371             8.7177                10.0582                9.4028
               4-16+            10.5790          10.9458             8.6235                9.9655                 9.3094
                4-17            10.4873          10.8550             8.5298                9.8733                 9.2165
               4-17+            10.3961          10.7648             8.4367                9.7816                 9.1242
                4-18            10.3055          10.6750             8.3440                9.6905                 9.0323
               4-18+            10.2153          10.5858             8.2519                9.5998                 8.9410
                4-19            10.1257          10.4970             8.1603                9.5096                 8.8502
               4-19+            10.0365          10.4088             8.0692                9.4200                 8.7598
                4-20             9.9478          10.3210             7.9786                9.3308                 8.6700
               4-20+             9.8596          10.2337             7.8885                9.2421                 8.5807
                4-21             9.7719          10.1468             7.7989                9.1539                 8.4918
               4-21+             9.6847          10.0605             7.7097                9.0662                 8.4035
                4-22             9.5979          9.9746              7.6211                8.9789                 8.3156
               4-22+             9.5116          9.8892              7.5329                8.8922                 8.2282
                4-23             9.4258          9.8042              7.4452                8.8058                 8.1412
               4-23+             9.3404          9.7197              7.3580                8.7200                 8.0547
                4-24             9.2555          9.6356              7.2712                8.6346                 7.9687
- ----------------------------------------------------------------------------------------------------------------------------------

- ----------------------------------------------------------------------------------------------------------------------------------
     Spread @ Center Price        386              423                 190                   325                    259
                       WAL      8.83100          9.02026             8.27620               8.63901                8.45418
                  Mod Durn       3.786            3.825               3.706                 3.765                  3.738
             Mod Convexity       0.234            0.240               0.225                 0.232                  0.229
          Principal Window   Jan00 to Aug19  Jan00 to Nov19      Jan00 to Nov19        Jan00 to Nov19         Jan00 to Nov19
             Maturity #mos        236              239                 239                   239                    239
          Accrued Interest     371,510.26      371,510.26          371,510.26            371,510.26             371,510.26
         Total Collat Loss    0.00 (0.00%)    0.00 (0.00%)    52,291,577.27 (5.90%) 18,486,629.17 (2.09%)  35,897,664.49 (4.05%)

                    Prepay     At 100 CPR       At 0 CPR           At 100 CPR            At 100 CPR             At 100 CPR
                No prepays   During any YM    During any YM       During any YM         During any YM          During any YM
     Lockout and penalties  Include penalty  Include penalty     Include penalty       Include penalty        Include penalty

     Extension, if balloon        None            None                None                  None                   None
           Increase Coupon
           Pay Exten Princ

                   Default      At 0 CDR        At 0 CDR        At 0 for 24 3 CDR     At 0 for 24 1 CDR      At 0 for 24 2 CDR
             Loss Severity         0                0                 0.35                  0.35                   0.35
         Servicer Advances   100% of P & I    100% of P & I       100% of P & I         100% of P & I          100% of P & I
              Recovery Lag       12 mos          12 mos              12 mos                12 mos                 12 mos

       Optional Redemption
- ----------------------------------------------------------------------------------------------------------------------------------

<CAPTION>
                                                                           20CPR; YM;
                                100CPR;           100CPR; YM;             EXT0MO 100%
                              EXT0MO 100%         EXT0MO 100%              0% RULES;
                               0% RULES;           0% RULES;                0 FOR 24
                                0CDR,35%         0 FOR 24 6CDR,             1CDR,35%
                                ADV100%           35% ADV100%               ADV100%
              PRICE           LAG12; 300BP         LAG12; 0BP              LAG12; 0BP
- ------------------------------------------------------------------------------------------
<S>                             <C>                  <C>                    <C>
                4-16            10.3968              6.4535                 10.3901
               4-16+            10.3043              6.3555                 10.2982
                4-17            10.2123              6.2580                 10.2068
               4-17+            10.1209              6.1611                 10.1159
                4-18            10.0299              6.0646                 10.0255
               4-18+            9.9394               5.9688                  9.9356
                4-19            9.8495               5.8734                  9.8463
               4-19+            9.7600               5.7785                  9.7574
                4-20            9.6710               5.6842                  9.6690
               4-20+            9.5825               5.5904                  9.5811
                4-21            9.4945               5.4971                  9.4936
               4-21+            9.4069               5.4043                  9.4067
                4-22            9.3199               5.3119                  9.3202
               4-22+            9.2333               5.2201                  9.2341
                4-23            9.1471               5.1288                  9.1486
               4-23+            9.0614               5.0379                  9.0635
                4-24            8.9762               4.9475                  8.9788
- ------------------------------------------------------------------------------------------

- ------------------------------------------------------------------------------------------
     Spread @ Center Price        59                   -38                    358
                       WAL      8.35207              7.78077                8.80515
                  Mod Durn       3.773                3.559                  3.798
             Mod Convexity       0.232                0.205                  0.237
          Principal Window  Jan00 to Aug19       Jan00 to Nov19          Jan00 to Nov19
             Maturity #mos        236                  239                    239
          Accrued Interest    371,510.26           371,510.26              371,510.26
         Total Collat Loss   0.00 (0.00%)    95,910,358.23 (10.83%)  18,512,203.38 (2.09%)

                    Prepay    At 100 CPR           At 100 CPR              At 20 CPR
                No prepays                        During any YM          During any YM
     Lockout and penalties  Include penalty      Include penalty        Include penalty

     Extension, if balloon       None                 None                    None
           Increase Coupon
           Pay Exten Princ

                   Default     At 0 CDR         At 0 for 24 6 CDR      At 0 for 24 1 CDR
             Loss Severity       0.35                 0.35                    0.35
         Servicer Advances   100% of P & I        100% of P & I          100% of P & I
              Recovery Lag      12 mos               12 mos                  12 mos

       Optional Redemption
- ------------------------------------------------------------------------------------------
</TABLE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<PAGE>

FUNB99C4_RED, Class AAA_1--Price/Yield


<TABLE>
- ---------------------------------------------------------------------------------------------------
<S>                <C>        <C>               <C>               <C>                    <C>
CUSIP                         Face              $206,000,000.00   Settle at Pricing
Coupon              7.102     Original Balance  $206,000,000.00   Accrual begins         12/1/1999
Delay                14       Current Balance   $206,000,000.00   Factor Date                N/A
Stated Maturity      N/A      Factor                   1          ---------------------------------
Type               SEN FIX    ------------------------------------
- ------------------------------
</TABLE>

YIELD CURVE: Spread off interpolated node
3MO=5.68, 6MO=5.68, 1YR=5.68, 2YR=5.942, 5YR=6.02, 10YR=6.107, 30YR=6.208

<TABLE>
<CAPTION>
- -----------------------------------------------------------------------------------------------------------------------------------
     PRICE                0 CPR, AFTER     15 CPR, AFTER    25 CPR, AFTER     50 CPR, AFTER     75 CPR, AFTER    100 CPR, AFTER
                               YM               YM                 YM               YM                YM                YM
                             Yield
- -----------------------------------------------------------------------------------------------------------------------------------
<S>                         <C>               <C>               <C>               <C>               <C>              <C>
     100-08                 7.0847            7.0846            7.0846            7.0844            7.0842           7.0824
     100-09                 7.0774            7.0773            7.0773            7.0771            7.0769           7.0750
     100-10                 7.0701            7.0700            7.0700            7.0698            7.0696           7.0676
     100-11                 7.0628            7.0628            7.0627            7.0625            7.0623           7.0601
     100-12                 7.0555            7.0555            7.0554            7.0553            7.0550           7.0527
     100-13                 7.0483            7.0482            7.0481            7.0480            7.0477           7.0453
     100-14                 7.0410            7.0409            7.0409            7.0407            7.0404           7.0379
     100-15                 7.0337            7.0336            7.0336            7.0334            7.0331           7.0305
     100-16                 7.0265            7.0264            7.0263            7.0261            7.0258           7.0231
     100-17                 7.0192            7.0191            7.0190            7.0188            7.0185           7.0157
     100-18                 7.0119            7.0118            7.0118            7.0116            7.0112           7.0083
     100-19                 7.0047            7.0046            7.0045            7.0043            7.0040           7.0009
     100-20                 6.9974            6.9973            6.9972            6.9970            6.9967           6.9935
     100-21                 6.9902            6.9901            6.9900            6.9897            6.9894           6.9861
     100-22                 6.9829            6.9828            6.9827            6.9825            6.9821           6.9788
     100-23                 6.9757            6.9756            6.9755            6.9752            6.9748           6.9714
     100-24                 6.9684            6.9683            6.9682            6.9680            6.9676           6.9640
- -----------------------------------------------------------------------------------------------------------------------------------

- -----------------------------------------------------------------------------------------------------------------------------------
Spread @ Center Price         100               100               100              100                100              100
                  WAL       5.40011           5.39691           5.39453          5.38725            5.37621          5.27927
             Mod Durn        4.266             4.264             4.263            4.258              4.251            4.189
        Mod Convexity        0.249             0.249             0.249            0.248              0.247            0.240
     Principal Window   Jan00 to Sep08    Jan00 to Sep08    Jan00 to Sep08    Jan00 to Sep08    Jan00 to Sep08   Jan00 to Sep08
        Maturity #mos         105               105               105              105                105              105
     Accrued Interest     650,227.56        650,227.56        650,227.56        650,227.56        650,227.56       650,227.56
    Total Collat Loss    0.00 (0.00%)      0.00 (0.00%)      0.00 (0.00%)      0.00 (0.00%)      0.00 (0.00%)     0.00 (0.00%)

               Prepay      At 0 CPR          At 15 CPR         At 25 CPR        At 50 CPR          At 75 CPR       At 100 CPR
           No prepays    During any YM     During any YM     During any YM    During any YM      During any YM    During any YM
Lockout and penalties   Include penalty   Include penalty   Include penalty  Include penalty    Include penalty  Include penalty

Extension, if balloon        None              None              None              None              None             None
      Increase Coupon
      Pay Exten Princ

              Default      At 0 CDR          At 0 CDR          At 0 CDR          At 0 CDR          At 0 CDR         At 0 CDR
        Loss Severity        0.35              0.35              0.35              0.35              0.35             0.35
    Servicer Advances    100% of P & I     100% of P & I     100% of P & I    100% of P & I      100% of P & I    100% of P & I
         Recovery Lag       12 mos            12 mos            12 mos            12 mos            12 mos           12 mos

  Optional Redemption
- -----------------------------------------------------------------------------------------------------------------------------------
</TABLE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<PAGE>

FUNB99C4_RED, Class AAA_2--Price/Yield


<TABLE>
- ---------------------------------------------------------------------------------------------------
<S>                <C>        <C>               <C>               <C>                    <C>
CUSIP                         Face              $447,304,000.00   Settle at Pricing
Coupon              7.286     Original Balance  $447,304,000.00   Accrual begins         12/1/1999
Delay                14       Current Balance   $447,304,000.00   Factor Date                N/A
Stated Maturity      N/A      Factor                   1          ---------------------------------
Type               SEN FIX    ------------------------------------
- ------------------------------
</TABLE>

YIELD CURVE: Spread off interpolated node
3MO=5.68, 6MO=5.68, 1YR=5.68, 2YR=5.942, 5YR=6.02, 10YR=6.107, 30YR=6.208

<TABLE>
<CAPTION>
- -----------------------------------------------------------------------------------------------------------------------------------
          PRICE           0 CPR, AFTER   15 CPR, AFTER    25 CPR, AFTER      50 CPR, AFTER     75 CPR, AFTER    100 CPR, AFTER
                               YM              YM               YM                 YM                YM                YM
                             Yield
- -----------------------------------------------------------------------------------------------------------------------------------
<S>                        <C>               <C>               <C>               <C>               <C>              <C>
          100-08           7.3187            7.3187            7.3187             7.3186            7.3185            7.3176
          100-09           7.3141            7.3141            7.3141             7.3140            7.3139            7.3129
          100-10           7.3095            7.3095            7.3095             7.3094            7.3093            7.3083
          100-11           7.3049            7.3049            7.3049             7.3048            7.3046            7.3036
          100-12           7.3004            7.3003            7.3003             7.3002            7.3000            7.2990
          100-13           7.2958            7.2957            7.2957             7.2956            7.2954            7.2943
          100-14           7.2912            7.2911            7.2911             7.2910            7.2908            7.2896
          100-15           7.2866            7.2865            7.2865             7.2864            7.2862            7.2850
          100-16           7.2820            7.2820            7.2819             7.2818            7.2816            7.2803
          100-17           7.2774            7.2774            7.2773             7.2772            7.2770            7.2757
          100-18           7.2728            7.2728            7.2727             7.2726            7.2724            7.2710
          100-19           7.2683            7.2682            7.2682             7.2680            7.2678            7.2664
          100-20           7.2637            7.2636            7.2636             7.2634            7.2632            7.2618
          100-21           7.2591            7.2590            7.2590             7.2589            7.2587            7.2571
          100-22           7.2545            7.2545            7.2544             7.2543            7.2541            7.2525
          100-23           7.2500            7.2499            7.2499             7.2497            7.2495            7.2478
          100-24           7.2454            7.2453            7.2453             7.2451            7.2449            7.2432
- ------------------------------------------------------------------------------------------------------------------------------------

- ------------------------------------------------------------------------------------------------------------------------------------
Spread @ Center Price        118               118               118               118                118               118
                  WAL      9.73353           9.72712           9.72233           9.70761            9.68560           9.53372
             Mod Durn       6.762             6.759             6.757             6.750              6.739             6.666
        Mod Convexity       0.594             0.593             0.593             0.592              0.590             0.576
     Principal Window  Sep08 to Nov09    Sep08 to Nov09    Sep08 to Nov09     Sep08 to Nov09    Sep08 to Oct09    Sep08 to Sep09
        Maturity #mos        119               119               119               119                118               117
     Accrued Interest   1,448,469.75      1,448,469.75      1,448,469.75       1,448,469.75      1,448,469.75      1,448,469.75
    Total Collat Loss   0.00 (0.00%)      0.00 (0.00%)      0.00 (0.00%)       0.00 (0.00%)      0.00 (0.00%)      0.00 (0.00%)

               Prepay     At 0 CPR          At 15 CPR         At 25 CPR         At 50 CPR          At 75 CPR        At 100 CPR
           No prepays   During any YM     During any YM     During any YM     During any YM      During any YM     During any YM
Lockout and penalties  Include penalty   Include penalty   Include penalty   Include penalty    Include penalty   Include penalty

Extension, if balloon       None              None              None               None              None              None
      Increase Coupon
      Pay Exten Princ

              Default     At 0 CDR          At 0 CDR          At 0 CDR           At 0 CDR          At 0 CDR          At 0 CDR
        Loss Severity       0.35              0.35              0.35               0.35              0.35              0.35
    Servicer Advances   100% of P & I     100% of P & I     100% of P & I     100% of P & I      100% of P & I     100% of P & I
         Recovery Lag      12 mos            12 mos            12 mos             12 mos            12 mos            12 mos

  Optional Redemption
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE>


Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<PAGE>

FUNB99C4_RED, Class AAA_1--Price/Yield

<TABLE>
- ---------------------------------------------------------------------------------------------------
<S>                <C>        <C>               <C>               <C>                    <C>
CUSIP                         Face              $206,000,000.00   Settle at Pricing
Coupon              7.102     Original Balance  $206,000,000.00   Accrual begins         12/1/1999
Delay                14       Current Balance   $206,000,000.00   Factor Date                N/A
Stated Maturity      N/A      Factor                   1          ---------------------------------
Type               SEN FIX    ------------------------------------
- ------------------------------
</TABLE>

YIELD CURVE: Spread off interpolated node
3MO=5.68, 6MO=5.68, 1YR=5.68, 2YR=5.942, 5YR=6.02, 10YR=6.107, 30YR=6.208

<TABLE>
<CAPTION>
- ----------------------------------------------------------------------------------------------------------------------------------
     PRICE                   0 CPR           15 CPR           25 CPR             50 CPR          75 CPR              100 CPR
                             Yield
- ----------------------------------------------------------------------------------------------------------------------------------
<S>                         <C>              <C>              <C>                <C>             <C>                 <C>
     100-08                 7.0847           7.2681           7.3493             7.4725          7.5423              7.6318
     100-09                 7.0774           7.2601           7.3410             7.4636          7.5331              7.6219
     100-10                 7.0701           7.2522           7.3327             7.4548          7.5238              7.6120
     100-11                 7.0628           7.2443           7.3245             7.4459          7.5145              7.6021
     100-12                 7.0555           7.2363           7.3162             7.4371          7.5053              7.5922
     100-13                 7.0483           7.2284           7.3080             7.4282          7.4960              7.5823
     100-14                 7.0410           7.2205           7.2997             7.4194          7.4868              7.5724
     100-15                 7.0337           7.2126           7.2915             7.4105          7.4775              7.5625
     100-16                 7.0265           7.2046           7.2832             7.4017          7.4683              7.5526
     100-17                 7.0192           7.1967           7.2750             7.3929          7.4590              7.5427
     100-18                 7.0119           7.1888           7.2668             7.3840          7.4498              7.5328
     100-19                 7.0047           7.1809           7.2585             7.3752          7.4406              7.5229
     100-20                 6.9974           7.1730           7.2503             7.3664          7.4314              7.5131
     100-21                 6.9902           7.1651           7.2421             7.3576          7.4221              7.5032
     100-22                 6.9829           7.1572           7.2339             7.3488          7.4129              7.4933
     100-23                 6.9757           7.1493           7.2257             7.3400          7.4037              7.4835
     100-24                 6.9684           7.1415           7.2175             7.3311          7.3945              7.4736
- ----------------------------------------------------------------------------------------------------------------------------------

- ----------------------------------------------------------------------------------------------------------------------------------
Spread @ Center Price         100              119              127               140              147                 156
                  WAL       5.40011          4.90664          4.69634           4.36349          4.17320             3.90726
             Mod Durn        4.266            3.917            3.763             3.508            3.355               3.135
        Mod Convexity        0.249            0.213            0.199             0.178            0.167               0.153
     Principal Window   Jan00 to Sep08   Jan00 to Sep07   Jan00 to Sep07     Jan00 to Sep07  Jan00 to Aug07      Jan00 to Jul07
        Maturity #mos         105              93               93                 93              92                  91
     Accrued Interest     650,227.56       650,227.56       650,227.56         650,227.56      650,227.56          650,227.56
    Total Collat Loss    0.00 (0.00%)     0.00 (0.00%)     0.00 (0.00%)       0.00 (0.00%)    0.00 (0.00%)        0.00 (0.00%)

               Prepay      At 0 CPR         At 15 CPR        At 25 CPR         At 50 CPR        At 75 CPR          At 100 CPR
           No prepays
Lockout and penalties   Include penalty  Include penalty  Include penalty   Include penalty  Include penalty     Include penalty

Extension, if balloon        None             None             None               None            None                None
      Increase Coupon
      Pay Exten Princ

              Default      At 0 CDR         At 0 CDR         At 0 CDR           At 0 CDR        At 0 CDR            At 0 CDR
        Loss Severity        0.35             0.35             0.35               0.35            0.35                0.35
    Servicer Advances    100% of P & I    100% of P & I    100% of P & I     100% of P & I    100% of P & I       100% of P & I
         Recovery Lag       12 mos           12 mos           12 mos             12 mos          12 mos              12 mos

  Optional Redemption
- ----------------------------------------------------------------------------------------------------------------------------------
</TABLE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<PAGE>

FUNB99C4_RED, Class AAA_2--Price/Yield

<TABLE>
- ---------------------------------------------------------------------------------------------------
<S>                <C>        <C>               <C>               <C>                    <C>
CUSIP                         Face              $447,304,000.00   Settle at Pricing
Coupon              7.286     Original Balance  $447,304,000.00   Accrual begins         12/1/1999
Delay                14       Current Balance   $447,304,000.00   Factor Date                N/A
Stated Maturity      N/A      Factor                   1          ---------------------------------
Type               SEN FIX    ------------------------------------
- ------------------------------
</TABLE>

YIELD CURVE: Spread off interpolated node
3MO=5.68, 6MO=5.68, 1YR=5.68, 2YR=5.942, 5YR=6.02, 10YR=6.107, 30YR=6.208

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
     PRICE                   0 CPR              15 CPR             25 CPR             50 CPR            75 CPR          100 CPR
                             Yield
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                         <C>                 <C>                <C>                <C>               <C>             <C>
     100-08                 7.3187              7.3209             7.3199             7.3181            7.3177          7.3168
     100-09                 7.3141              7.3162             7.3153             7.3135            7.3131          7.3121
     100-10                 7.3095              7.3116             7.3107             7.3088            7.3084          7.3074
     100-11                 7.3049              7.3070             7.3060             7.3042            7.3037          7.3027
     100-12                 7.3004              7.3024             7.3014             7.2995            7.2991          7.2980
     100-13                 7.2958              7.2977             7.2968             7.2949            7.2944          7.2933
     100-14                 7.2912              7.2931             7.2921             7.2902            7.2898          7.2886
     100-15                 7.2866              7.2885             7.2875             7.2856            7.2851          7.2839
     100-16                 7.2820              7.2839             7.2829             7.2810            7.2805          7.2792
     100-17                 7.2774              7.2793             7.2782             7.2763            7.2758          7.2745
     100-18                 7.2728              7.2747             7.2736             7.2717            7.2712          7.2698
     100-19                 7.2683              7.2701             7.2690             7.2671            7.2666          7.2651
     100-20                 7.2637              7.2654             7.2644             7.2624            7.2619          7.2604
     100-21                 7.2591              7.2608             7.2598             7.2578            7.2573          7.2557
     100-22                 7.2545              7.2562             7.2551             7.2532            7.2527          7.2510
     100-23                 7.2500              7.2516             7.2505             7.2485            7.2480          7.2463
     100-24                 7.2454              7.2470             7.2459             7.2439            7.2434          7.2416
- ------------------------------------------------------------------------------------------------------------------------------------

- ------------------------------------------------------------------------------------------------------------------------------------
Spread @ Center Price         118                 118                118               118                118             118
                  WAL       9.73353             9.64383            9.61166           9.57706            9.55597         9.40505
             Mod Durn        6.762               6.717              6.701             6.683              6.673           6.600
        Mod Convexity        0.594               0.586              0.583             0.580              0.578           0.564
     Principal Window   Sep08 to Nov09      Sep07 to Nov09     Sep07 to Nov09     Sep07 to Nov09    Aug07 to Oct09  Jul07 to Sep09
        Maturity #mos         119                 119                119               119                118             117
     Accrued Interest    1,448,469.75        1,448,469.75       1,448,469.75       1,448,469.75      1,448,469.75    1,448,469.75
    Total Collat Loss    0.00 (0.00%)        0.00 (0.00%)       0.00 (0.00%)       0.00 (0.00%)      0.00 (0.00%)    0.00 (0.00%)

               Prepay      At 0 CPR            At 15 CPR          At 25 CPR         At 50 CPR          At 75 CPR      At 100 CPR
           No prepays
Lockout and penalties   Include penalty     Include penalty    Include penalty   Include penalty    Include penalty Include penalty

Extension, if balloon        None                None               None               None              None            None
      Increase Coupon
      Pay Exten Princ

              Default      At 0 CDR            At 0 CDR           At 0 CDR           At 0 CDR          At 0 CDR        At 0 CDR
        Loss Severity        0.35                0.35               0.35               0.35              0.35            0.35
    Servicer Advances    100% of P & I       100% of P & I      100% of P & I     100% of P & I      100% of P & I   100% of P & I
         Recovery Lag       12 mos              12 mos             12 mos             12 mos            12 mos          12 mos

  Optional Redemption
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<PAGE>

FUNB99C4_RED, Class AAA_2--Price/Yield


<TABLE>
- ---------------------------------------------------------------------------------------------------
<S>                <C>        <C>               <C>               <C>                    <C>
CUSIP                         Face              $447,304,000.00   Settle at Pricing
Coupon              7.286     Original Balance  $447,304,000.00   Accrual begins         12/1/1999
Delay                 14      Current Balance   $447,304,000.00   Factor Date                N/A
Stated Maturity      N/A      Factor                   1          ---------------------------------
Type               SEN FIX    ------------------------------------
- ------------------------------
</TABLE>

YIELD CURVE: Spread off interpolated node
3MO=5.68, 6MO=5.68, 1YR=5.68, 2YR=5.942, 5YR=6.02, 10YR=6.107, 30YR=6.208

- --------------------------------------------------------------------------------
                                          0 CPR, EXTEND        0 CPR, EXTEND
     PRICE                  0 CPR         50%, 36 MONTHS      100%, 36 MONTHS
                            Yield
- --------------------------------------------------------------------------------
     100-08                 7.3187             7.3229              7.3308
     100-09                 7.3141             7.3186              7.3269
     100-10                 7.3095             7.3142              7.3230
     100-11                 7.3049             7.3099              7.3191
     100-12                 7.3004             7.3055              7.3152
     100-13                 7.2958             7.3012              7.3113
     100-14                 7.2912             7.2969              7.3075
     100-15                 7.2866             7.2925              7.3036
     100-16                 7.2820             7.2882              7.2997
     100-17                 7.2774             7.2838              7.2958
     100-18                 7.2728             7.2795              7.2919
     100-19                 7.2683             7.2752              7.2881
     100-20                 7.2637             7.2708              7.2842
     100-21                 7.2591             7.2665              7.2803
     100-22                 7.2545             7.2622              7.2764
     100-23                 7.2500             7.2579              7.2726
     100-24                 7.2454             7.2535              7.2687
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
Spread @ Center Price        118                 118                 118
                  WAL      9.73353            10.60428            12.57126
             Mod Durn       6.762               7.145               7.988
        Mod Convexity       0.594               0.676               0.863
     Principal Window   Sep08 to Nov09     Jun09 to Sep12      Jul10 to Nov12
        Maturity #mos        119                 153                 155
     Accrued Interest    1,448,469.75       1,448,469.75        1,448,469.75
    Total Collat Loss    0.00 (0.00%)       0.00 (0.00%)        0.00 (0.00%)

               Prepay      At 0 CPR           At 0 CPR            At 0 CPR
           No prepays
Lockout and penalties  Include penalty     Include penalty     Include penalty

Extension, if balloon        None         Extend 50% 36 mos  Extend 100% 36 mos
      Increase Coupon                     0% for extension    0% for extension
      Pay Exten Princ                    By pre-exten rules  By pre-exten rules

              Default      At 0 CDR           At 0 CDR            At 0 CDR
        Loss Severity         0                   0                   0
    Servicer Advances   100% of P & I       100% of P & I       100% of P & I
         Recovery Lag       0 mos               0 mos               0 mos

  Optional Redemption
- --------------------------------------------------------------------------------

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.
<PAGE>

FUNB99C4_RED, Class AAA_2--Price/Yield

<TABLE>
- ---------------------------------------------------------------------------------------------------
<S>                <C>        <C>               <C>               <C>                    <C>
CUSIP                         Face              $447,304,000.00   Settle at Pricing
Coupon              7.286     Original Balance  $447,304,000.00   Accrual begins         12/1/1999
Delay                14       Current Balance   $447,304,000.00   Factor Date                N/A
Stated Maturity      N/A      Factor                   1          ---------------------------------
Type               SEN FIX    ------------------------------------
- ------------------------------
</TABLE>

YIELD CURVE: Spread off interpolated node
3MO=5.68, 6MO=5.68, 1YR=5.68, 2YR=5.942, 5YR=6.02, 10YR=6.107, 30YR=6.208

<TABLE>
<CAPTION>
- ----------------------------------------------------------------------------------------------------------------
                         0CPR; EXT0MO       0CPR; EXT0MO            0CPR; EXT0MO            0CPR; EXT0MO
                        100% 0% RULES;     100% 0% RULES;          100% 0% RULES;          100% 0% RULES;
                       0CDR,0% ADV100%        1CDR,75%            3CDR,75% ADV100%        5CDR,75% ADV100%
     PRICE                  LAG12          ADV100% LAG12               LAG12                    LAG12
                            Yield
- ----------------------------------------------------------------------------------------------------------------
<S>                         <C>                <C>                     <C>                      <C>
     100-08                 7.3187             7.3187                  7.3186                   7.3192
     100-09                 7.3141             7.3141                  7.3140                   7.3146
     100-10                 7.3095             7.3095                  7.3094                   7.3100
     100-11                 7.3049             7.3049                  7.3048                   7.3055
     100-12                 7.3004             7.3003                  7.3002                   7.3009
     100-13                 7.2958             7.2957                  7.2956                   7.2963
     100-14                 7.2912             7.2911                  7.2910                   7.2918
     100-15                 7.2866             7.2865                  7.2864                   7.2872
     100-16                 7.2820             7.2820                  7.2818                   7.2827
     100-17                 7.2774             7.2774                  7.2772                   7.2781
     100-18                 7.2728             7.2728                  7.2726                   7.2736
     100-19                 7.2683             7.2682                  7.2681                   7.2690
     100-20                 7.2637             7.2636                  7.2635                   7.2645
     100-21                 7.2591             7.2591                  7.2589                   7.2599
     100-22                 7.2545             7.2545                  7.2543                   7.2554
     100-23                 7.2500             7.2499                  7.2497                   7.2508
     100-24                 7.2454             7.2453                  7.2452                   7.2463
- ----------------------------------------------------------------------------------------------------------------

- ----------------------------------------------------------------------------------------------------------------
Spread @ Center Price         118                118                     118                     118
                  WAL       9.73353            9.72947                 9.71432                 9.83074
             Mod Durn        6.762              6.760                   6.752                   6.802
        Mod Convexity        0.594              0.594                   0.592                   0.603
     Principal Window   Sep08 to Nov09     Jun08 to Nov09          Sep07 to Nov09           Sep07 to Dec13
        Maturity #mos         119                119                     119                     168
     Accrued Interest    1,448,469.75       1,448,469.75            1,448,469.75             1,448,469.75
    Total Collat Loss    0.00 (0.00%)   52,023,444.02 (5.87%)  144,586,372.00 (16.32%) 223,603,658.74 (25.24%)

               Prepay      At 0 CPR           At 0 CPR                At 0 CPR                 At 0 CPR
           No prepays
Lockout and penalties   Include penalty    Include penalty         Include penalty         Include penalty

Extension, if balloon        None               None                    None                     None
      Increase Coupon
      Pay Exten Princ

              Default      At 0 CDR           At 1 CDR                At 3 CDR                 At 5 CDR
        Loss Severity          0                0.75                    0.75                     0.75
    Servicer Advances    100% of P & I      100% of P & I           100% of P & I           100% of P & I
         Recovery Lag       12 mos             12 mos                  12 mos                   12 mos

  Optional Redemption
- ----------------------------------------------------------------------------------------------------------------

<CAPTION>
- ----------------------------------------------------------------------------------------------
                             0CPR; EXT0MO           0CPR; EXT0MO             0CPR; EXT0MO
                            100% 0% RULES;         100% 0% RULES;           100% 0% RULES;
                           1CDR,50% ADV100%       3CDR,50% ADV100%         5CDR,50% ADV100%
         PRICE                  LAG12                  LAG12                    LAG12
- ----------------------------------------------------------------------------------------------
<S>                            <C>                    <C>                     <C>
         100-08                7.3183                 7.3173                  7.3159
         100-09                7.3137                 7.3126                  7.3111
         100-10                7.3091                 7.3079                  7.3064
         100-11                7.3044                 7.3032                  7.3016
         100-12                7.2998                 7.2986                  7.2969
         100-13                7.2952                 7.2939                  7.2921
         100-14                7.2906                 7.2892                  7.2873
         100-15                7.2860                 7.2845                  7.2826
         100-16                7.2814                 7.2799                  7.2778
         100-17                7.2768                 7.2752                  7.2731
         100-18                7.2722                 7.2705                  7.2684
         100-19                7.2676                 7.2659                  7.2636
         100-20                7.2630                 7.2612                  7.2589
         100-21                7.2584                 7.2565                  7.2541
         100-22                7.2538                 7.2519                  7.2494
         100-23                7.2492                 7.2472                  7.2447
         100-24                7.2446                 7.2426                  7.2399
- ----------------------------------------------------------------------------------------------

- ----------------------------------------------------------------------------------------------
Spread @ Center Price            118                    118                     118
                  WAL          9.66318                9.49515                 9.28672
             Mod Durn           6.727                  6.640                   6.528
        Mod Convexity           0.588                  0.573                   0.555
     Principal Window      Sep07 to Nov09         May07 to Nov09          Dec05 to Nov09
        Maturity #mos            119                    119                     119
     Accrued Interest       1,448,469.75           1,448,469.75            1,448,469.75
    Total Collat Loss   34,685,919.68 (3.92%) 96,398,847.88 (10.88%)  149,078,716.70 (16.83%)

               Prepay         At 0 CPR               At 0 CPR                At 0 CPR
           No prepays
Lockout and penalties      Include penalty        Include penalty         Include penalty

Extension, if balloon           None                   None                    None
      Increase Coupon
      Pay Exten Princ

              Default         At 1 CDR               At 3 CDR                At 5 CDR
        Loss Severity            0.5                    0.5                     0.5
    Servicer Advances       100% of P & I          100% of P & I           100% of P & I
         Recovery Lag          12 mos                 12 mos                  12 mos

  Optional Redemption
- ----------------------------------------------------------------------------------------------
</TABLE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.
<PAGE>

FUNB-ONLY_RED, Class AAA_2--Price/Yield


<TABLE>
- ---------------------------------------------------------------------------------------------------
<S>                <C>        <C>               <C>               <C>                    <C>
CUSIP                         Face              $353,379,000.00   Settle at Pricing
Coupon              7.286     Original Balance  $353,379,000.00   Accrual begins         12/1/1999
Delay                14       Current Balance   $353,379,000.00   Factor Date                N/A
Stated Maturity      N/A      Factor                   1          ---------------------------------
Type               SEN FIX    ------------------------------------
- ------------------------------
</TABLE>

YIELD CURVE: Spread off interpolated node
3MO=5.68, 6MO=5.68, 1YR=5.68, 2YR=5.942, 5YR=6.02, 10YR=6.107, 30YR=6.208

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------
                         0CPR; EXT0MO          25CPR; EXT0MO     50CPR; EXT0MO       75CPR; EXT0MO          100CPR; EXT0MO
                        100% 0% RULES;         100% 0% RULES;    100% 0% RULES;      100% 0% RULES;         100% 0% RULES;
                       0CDR,0% ADV100%        0CDR,0% ADV100%   0CDR,0% ADV100%     0CDR,0% ADV100%        0CDR,0% ADV100%
     PRICE                   LAG12                  LAG12            LAG12               LAG12                  LAG12
                            Yield
- ------------------------------------------------------------------------------------------------------------------------------
<S>                         <C>                 <C>                 <C>                  <C>                   <C>
     98-16                  7.5788              7.5828              7.5813               7.5812                7.5830
     98-24                  7.5413              7.5450              7.5434               7.5432                7.5447
     99-00                  7.5039              7.5073              7.5056               7.5054                7.5064
     99-08                  7.4667              7.4697              7.4679               7.4676                7.4683
     99-16                  7.4296              7.4322              7.4303               7.4300                7.4303
     99-24                  7.3925              7.3949              7.3929               7.3925                7.3924
     100-00                 7.3557              7.3577              7.3556               7.3552                7.3547
     100-08                 7.3189              7.3206              7.3184               7.3179                7.3171
     100-16                 7.2822              7.2836              7.2813               7.2808                7.2795
     100-24                 7.2457              7.2467              7.2443               7.2438                7.2422
     101-00                 7.2093              7.2100              7.2075               7.2069                7.2049
     101-08                 7.1730              7.1734              7.1708               7.1701                7.1677
     101-16                 7.1368              7.1369              7.1342               7.1335                7.1307
     101-24                 7.1008              7.1005              7.0977               7.0969                7.0938
     102-00                 7.0648              7.0642              7.0613               7.0605                7.0570
     102-08                 7.0290              7.0280              7.0251               7.0242                7.0203
     102-16                 6.9933              6.9920              6.9889               6.9880                6.9837
- ------------------------------------------------------------------------------------------------------------------------------

- ------------------------------------------------------------------------------------------------------------------------------
Spread @ Center Price         118                118                 118                   118                   118
                  WAL       9.76317            9.64307             9.60787               9.58970               9.44908
             Mod Durn        6.777              6.716               6.698                 6.690                 6.621
        Mod Convexity        0.597              0.586               0.583                 0.581                 0.568
     Principal Window   Jun09 to Nov09      Sep07 to Oct09      Sep07 to Oct09       Sep07 to Oct09        Jul07 to Aug09
        Maturity #mos         119                118                 118                   118                   116
     Accrued Interest    1,144,319.73        1,144,319.73        1,144,319.73         1,144,319.73          1,144,319.73
    Total Collat Loss    0.00 (0.00%)        0.00 (0.00%)        0.00 (0.00%)         0.00 (0.00%)          0.00 (0.00%)

               Prepay      At 0 CPR           At 25 CPR           At 50 CPR             At 75 CPR            At 100 CPR
           No prepays
Lockout and penalties   Include penalty    Include penalty     Include penalty       Include penalty       Include penalty

Extension, if balloon        None                None                None                 None                  None
      Increase Coupon
      Pay Exten Princ

              Default      At 0 CDR            At 0 CDR            At 0 CDR             At 0 CDR              At 0 CDR
        Loss Severity          0                  0                   0                     0                     0
    Servicer Advances    100% of P & I      100% of P & I       100% of P & I         100% of P & I         100% of P & I
         Recovery Lag       12 mos              12 mos              12 mos               12 mos                12 mos

  Optional Redemption
- ------------------------------------------------------------------------------------------------------------------------------
</TABLE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.
<PAGE>


FUNB-ONLY_RED, Class AAA_2--Price/Yield

<TABLE>
- ---------------------------------------------------------------------------------------------------
<S>                <C>        <C>               <C>               <C>                    <C>
CUSIP                        Face               $353,379,000.00   Settle at Pricing
Coupon              7.286    Original Balance   $353,379,000.00   Accrual begins         12/1/1999
Delay                14      Current Balance    $353,379,000.00   Factor Date                N/A
Stated Maturity      N/A     Factor                    1          ---------------------------------
Type               SEN FIX   -------------------------------------
- -----------------------------
</TABLE>

YIELD CURVE: Spread off interpolated node
3MO=5.68, 6MO=5.68, 1YR=5.68, 2YR=5.942, 5YR=6.02, 10YR=6.107, 30YR=6.208

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
                             0CPR; YM;                                 50CPR; YM;           75CPR; YM;             100CPR; YM;
                            EXT0MO 100%         25CPR; YM;            EXT0MO 100%          EXT0MO 100%             EXT0MO 100%
                             0% RULES;         EXT0MO 100%             0% RULES;            0% RULES;               0% RULES;
                          0CDR,0% ADV100%    0% RULES; 0CDR,        0CDR,0% ADV100%      0CDR,0% ADV100%         0CDR,0% ADV100%
     PRICE                     LAG12         0% ADV100% LAG12            LAG12                LAG12                   LAG12
                               Yield
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                         <C>                  <C>                    <C>                    <C>                    <C>
     98-16                  7.5788               7.5789                 7.5791                 7.5793                 7.5811
     98-24                  7.5413               7.5414                 7.5415                 7.5417                 7.5431
     99-00                  7.5039               7.5040                 7.5041                 7.5042                 7.5053
     99-08                  7.4667               7.4667                 7.4668                 7.4669                 7.4676
     99-16                  7.4296               7.4296                 7.4296                 7.4297                 7.4300
     99-24                  7.3925               7.3926                 7.3926                 7.3926                 7.3925
     100-00                 7.3557               7.3556                 7.3556                 7.3556                 7.3551
     100-08                 7.3189               7.3189                 7.3188                 7.3187                 7.3179
     100-16                 7.2822               7.2822                 7.2821                 7.2820                 7.2808
     100-24                 7.2457               7.2456                 7.2455                 7.2454                 7.2438
     101-00                 7.2093               7.2092                 7.2091                 7.2089                 7.2069
     101-08                 7.1730               7.1729                 7.1727                 7.1725                 7.1702
     101-16                 7.1368               7.1367                 7.1365                 7.1362                 7.1335
     101-24                 7.1008               7.1006                 7.1004                 7.1000                 7.0970
     102-00                 7.0648               7.0646                 7.0644                 7.0640                 7.0606
     102-08                 7.0290               7.0287                 7.0285                 7.0281                 7.0243
     102-16                 6.9933               6.9930                 6.9927                 6.9922                 6.9881
- ------------------------------------------------------------------------------------------------------------------------------------

- ------------------------------------------------------------------------------------------------------------------------------------
Spread @ Center Price         118                 118                    118                     118                    118
                  WAL       9.76317             9.75416                9.74340                 9.72748                9.58566
             Mod Durn        6.777               6.773                  6.767                   6.760                  6.692
        Mod Convexity        0.597               0.596                  0.595                   0.593                  0.580
     Principal Window   Jun09 to Nov09       May09 to Nov09         May09 to Oct09         Apr09 to Oct09         Mar09 to Sep09
        Maturity #mos         119                 119                    118                     118                    117
     Accrued Interest    1,144,319.73         1,144,319.73           1,144,319.73           1,144,319.73           1,144,319.73
    Total Collat Loss    0.00 (0.00%)         0.00 (0.00%)           0.00 (0.00%)           0.00 (0.00%)           0.00 (0.00%)

               Prepay      At 0 CPR            At 25 CPR              At 50 CPR               At 75 CPR             At 100 CPR
           No prepays    During any YM       During any YM          During any YM           During any YM          During any YM
Lockout and penalties   Include penalty     Include penalty        Include penalty         Include penalty        Include penalty

Extension, if balloon        None                 None                   None                   None                   None
      Increase Coupon
      Pay Exten Princ

              Default      At 0 CDR             At 0 CDR               At 0 CDR               At 0 CDR               At 0 CDR
        Loss Severity          0                   0                      0                       0                      0
    Servicer Advances    100% of P & I       100% of P & I          100% of P & I           100% of P & I          100% of P & I
         Recovery Lag       12 mos               12 mos                 12 mos                 12 mos                 12 mos

  Optional Redemption
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.
<PAGE>


FUNB-ONLY_RED, Class AAA_2--Price/Yield

<TABLE>
- ---------------------------------------------------------------------------------------------------
<S>                <C>        <C>               <C>               <C>                    <C>
CUSIP                         Face              $353,379,000.00   Settle at Pricing
Coupon              7.286     Original Balance  $353,379,000.00   Accrual begins        12/1/1999
Delay                14       Current Balance   $353,379,000.00   Factor Date              N/A
Stated Maturity      N/A      Factor                   1          ---------------------------------
Type               SEN FIX    ------------------------------------
- ------------------------------
</TABLE>

YIELD CURVE: Spread off interpolated node
3MO=5.68, 6MO=5.68, 1YR=5.68, 2YR=5.942, 5YR=6.02, 10YR=6.107, 30YR=6.208

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------
                         0CPR; EXT0MO       0CPR; EXT0MO 100%       0CPR; EXT0MO         0CPR; EXT0MO
                        100% 0% RULES;          0% RULES;          100% 0% RULES;       100% 0% RULES;
                       0CDR,35% ADV100%       0 FOR 24 1CDR,       0 FOR 24 2CDR,       0 FOR 24 3CDR,
      PRICE                 LAG12           35% ADV100% LAG12    35% ADV100% LAG12    35% ADV100% LAG12
                            Yield
- ------------------------------------------------------------------------------------------------------------
<S>                         <C>                  <C>                  <C>                    <C>
      99-16                 7.4296               7.4297               7.4299                 7.4302
      99-24                 7.3925               7.3925               7.3925                 7.3925
     100-00                 7.3557               7.3555               7.3552                 7.3549
     100-08                 7.3189               7.3186               7.3180                 7.3174
     100-16                 7.2822               7.2818               7.2809                 7.2800
     100-24                 7.2457               7.2451               7.2440                 7.2428
     101-00                 7.2093               7.2085               7.2071                 7.2057
     101-08                 7.1730               7.1721               7.1704                 7.1687
     101-16                 7.1368               7.1357               7.1338                 7.1318
     101-24                 7.1008               7.0995               7.0973                 7.0950
     102-00                 7.0648               7.0634               7.0609                 7.0584
     102-08                 7.0290               7.0274               7.0247                 7.0219
     102-16                 6.9933               6.9916               6.9886                 6.9854
     102-24                 6.9576               6.9558               6.9525                 6.9491
     103-00                 6.9221               6.9202               6.9166                 6.9129
     103-08                 6.8867               6.8846               6.8808                 6.8769
     103-16                 6.8515               6.8492               6.8451                 6.8409
- ------------------------------------------------------------------------------------------------------------

- ------------------------------------------------------------------------------------------------------------
Spread @ Center Price         103                 103                   103                    103
                  WAL       9.76317             9.70693               9.60959                9.51108
             Mod Durn        6.797               6.769                 6.719                  6.668
        Mod Convexity        0.599               0.594                 0.585                  0.577
     Principal Window   Jun09 to Nov09       Dec07 to Nov09       Sep07 to Nov09         Mar07 to Nov09
        Maturity #mos         119                 119                   119                    119
     Accrued Interest    1,144,319.73         1,144,319.73         1,144,319.73           1,144,319.73
    Total Collat Loss    0.00 (0.00%)    14,601,036.50 (2.06%) 28,356,073.15 (4.01%)  41,310,890.81 (5.84%)

               Prepay      At 0 CPR             At 0 CPR             At 0 CPR               At 0 CPR
           No prepays
Lockout and penalties   Include penalty     Include penalty       Include penalty        Include penalty

Extension, if balloon        None                 None                 None                   None
      Increase Coupon
      Pay Exten Princ

              Default      At 0 CDR        At 0 for 24 1 CDR     At 0 for 24 2 CDR      At 0 for 24 3 CDR
        Loss Severity        0.35                 0.35                 0.35                   0.35
    Servicer Advances    100% of P & I       100% of P & I         100% of P & I          100% of P & I
         Recovery Lag       12 mos               12 mos               12 mos                 12 mos

  Optional Redemption
- ------------------------------------------------------------------------------------------------------------

<CAPTION>
- ------------------------------------------------------------------------
                           0CPR; EXT0MO 100%          0CPR; EXT0MO
                            0% RULES; 0 FOR          100% 0% RULES;
                       0  24 4CDR,35% ADV100%        0 FOR 24 5CDR,
      PRICE                      LAG12             35% ADV100% LAG12
- ------------------------------------------------------------------------
<S>                               <C>                    <C>
      99-16                       7.4305                 7.4308
      99-24                       7.3924                 7.3923
     100-00                       7.3544                 7.3540
     100-08                       7.3166                 7.3157
     100-16                       7.2789                 7.2776
     100-24                       7.2413                 7.2396
     101-00                       7.2038                 7.2017
     101-08                       7.1665                 7.1640
     101-16                       7.1292                 7.1263
     101-24                       7.0921                 7.0888
     102-00                       7.0551                 7.0514
     102-08                       7.0183                 7.0141
     102-16                       6.9815                 6.9769
     102-24                       6.9448                 6.9399
     103-00                       6.9083                 6.9030
     103-08                       6.8719                 6.8661
     103-16                       6.8356                 6.8294
- ------------------------------------------------------------------------

- ------------------------------------------------------------------------
Spread @ Center Price              103                     103
                  WAL            9.39125                 9.25849
             Mod Durn             6.605                   6.533
        Mod Convexity             0.566                   0.555
     Principal Window         Jul06 to Nov09         Jan06 to Nov09
        Maturity #mos              119                     119
     Accrued Interest          1,144,319.73           1,144,319.73
    Total Collat Loss     53,508,912.47 (7.56%)   64,991,328.89 (9.19%)

               Prepay            At 0 CPR               At 0 CPR
           No prepays
Lockout and penalties        Include penalty         Include penalty

Extension, if balloon              None                   None
      Increase Coupon
      Pay Exten Princ

              Default       At 0 for 24 4 CDR       At 0 for 24 5 CDR
        Loss Severity              0.35                   0.35
    Servicer Advances         100% of P & I           100% of P & I
         Recovery Lag             12 mos                 12 mos

  Optional Redemption
- ------------------------------------------------------------------------
</TABLE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.
<PAGE>


FUNB-ONLY_RED, Class AAA_2--Price/Yield


<TABLE>
- ---------------------------------------------------------------------------------------------------
<S>                <C>        <C>               <C>               <C>                    <C>
CUSIP                         Face              $353,379,000.00   Settle at Pricing
Coupon              7.286     Original Balance  $353,379,000.00   Accrual begins         12/1/1999
Delay                14       Current Balance   $353,379,000.00   Factor Date                N/A
Stated Maturity      N/A      Factor                   1          ---------------------------------
Type               SEN FIX    ------------------------------------
- ------------------------------
</TABLE>

YIELD CURVE: Spread off interpolated node
3MO=5.68, 6MO=5.68, 1YR=5.68, 2YR=5.942, 5YR=6.02, 10YR=6.107, 30YR=6.208

<TABLE>
<CAPTION>
- -------------------------------------------------------------------------------------------------------------
                        50CPR; Ext0mo       50CPR; Ext0mo          50CPR; Ext0mo          50CPR; Ext0mo
                        100% 0% rules;      100% 0% rules;         100% 0% rules;         100% 0% rules;
                           0CDR,35%            0 for 24               0 for 24               0 for 24
     PRICE              adv100% lag12      1CDR,35% adv100%       2CDR,35% adv100%       3CDR,35% adv100%
                                                lag12                   lag12                 lag12
                            Yield
- -------------------------------------------------------------------------------------------------------------
<S>                         <C>                 <C>                     <C>                    <C>
     99-16                  7.4303              7.4312                  7.4331                 7.4352
     99-24                  7.3929              7.3934                  7.3949                 7.3965
     100-00                 7.3556              7.3558                  7.3568                 7.3580
     100-08                 7.3184              7.3183                  7.3189                 7.3196
     100-16                 7.2813              7.2809                  7.2811                 7.2813
     100-24                 7.2443              7.2437                  7.2434                 7.2431
     101-00                 7.2075              7.2065                  7.2058                 7.2051
     101-08                 7.1708              7.1695                  7.1684                 7.1672
     101-16                 7.1342              7.1326                  7.1311                 7.1294
     101-24                 7.0977              7.0958                  7.0939                 7.0917
     102-00                 7.0613              7.0591                  7.0568                 7.0542
     102-08                 7.0251              7.0225                  7.0198                 7.0167
     102-16                 6.9889              6.9861                  6.9830                 6.9794
     102-24                 6.9529              6.9498                  6.9462                 6.9422
     103-00                 6.9170              6.9136                  6.9096                 6.9051
     103-08                 6.8812              6.8775                  6.8731                 6.8681
     103-16                 6.8455              6.8415                  6.8367                 6.8313
- -------------------------------------------------------------------------------------------------------------

- -------------------------------------------------------------------------------------------------------------
Spread @ Center Price         103                 103                    104                     104
                  WAL       9.60787             9.50115                9.36322                 9.21231
             Mod Durn        6.718               6.663                  6.589                   6.506
        Mod Convexity        0.585               0.576                  0.564                   0.551
     Principal Window   Sep07 to Oct09      Nov06 to Oct09          Jan06 to Oct09         Jun05 to Oct09
        Maturity #mos         118                 118                    118                     118
     Accrued Interest    1,144,319.73        1,144,319.73            1,144,319.73           1,144,319.73
    Total Collat Loss    0.00 (0.00%)    13,582,000.52 (1.92%)  26,416,234.94 (3.73%)   38,539,338.51 (5.45%)

               Prepay      At 50 CPR           At 50 CPR              At 50 CPR               At 50 CPR
           No prepays
Lockout and penalties   Include penalty     Include penalty        Include penalty         Include penalty

Extension, if balloon        None                None                    None                   None
      Increase Coupon
      Pay Exten Princ

              Default      At 0 CDR        At 0 for 24 1 CDR      At 0 for 24 2 CDR       At 0 for 24 3 CDR
        Loss Severity        0.35                0.35                    0.35                   0.35
    Servicer Advances    100% of P & I       100% of P & I          100% of P & I           100% of P & I
         Recovery Lag       12 mos              12 mos                  12 mos                 12 mos

  Optional Redemption
- -------------------------------------------------------------------------------------------------------------

<CAPTION>
- ---------------------------------------------------------------------
                            50CPR; Ext0mo          50CPR; Ext0mo
                            100% 0% rules;         100% 0% rules;
                               0 for 24               0 for 24
     PRICE                 4CDR,35% adv100%       5CDR,35% adv100%
                                lag12                  lag12
- ---------------------------------------------------------------------
<S>                           <C>                     <C>
     99-16                    7.4373                  7.4388
     99-24                    7.3981                  7.3991
     100-00                   7.3591                  7.3595
     100-08                   7.3201                  7.3200
     100-16                   7.2813                  7.2807
     100-24                   7.2427                  7.2415
     101-00                   7.2041                  7.2024
     101-08                   7.1657                  7.1635
     101-16                   7.1274                  7.1247
     101-24                   7.0892                  7.0860
     102-00                   7.0512                  7.0474
     102-08                   7.0132                  7.0089
     102-16                   6.9754                  6.9706
     102-24                   6.9377                  6.9324
     103-00                   6.9001                  6.8943
     103-08                   6.8627                  6.8564
     103-16                   6.8253                  6.8185
- ---------------------------------------------------------------------

- ---------------------------------------------------------------------
Spread @ Center Price           104                     104
                  WAL         9.05774                 8.90390
             Mod Durn          6.420                   6.335
        Mod Convexity          0.538                   0.525
     Principal Window     Feb05 to Oct09          Dec04 to Oct09
        Maturity #mos           118                     118
     Accrued Interest      1,144,319.73            1,144,319.73
    Total Collat Loss  49,986,420.87 (7.07%)   60,791,119.70 (8.59%)

               Prepay        At 50 CPR               At 50 CPR
           No prepays
Lockout and penalties     Include penalty         Include penalty

Extension, if balloon          None                    None
      Increase Coupon
      Pay Exten Princ

              Default    At 0 for 24 4 CDR       At 0 for 24 5 CDR
        Loss Severity          0.35                    0.35
    Servicer Advances      100% of P & I           100% of P & I
         Recovery Lag         12 mos                  12 mos

  Optional Redemption
- ---------------------------------------------------------------------
</TABLE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.
<PAGE>

FUNB-ONLY_RED, Class AAA_2--Price/Yield

<TABLE>
- ---------------------------------------------------------------------------------------------------
<S>                <C>        <C>               <C>               <C>                    <C>
CUSIP                         Face              $353,379,000.00   Settle at Pricing
Coupon              7.286     Original Balance  $353,379,000.00   Accrual begins         12/1/1999
Delay                14       Current Balance   $353,379,000.00   Factor Date                N/A
Stated Maturity      N/A      Factor                   1          ---------------------------------
Type               SEN FIX    ------------------------------------
- ------------------------------
</TABLE>

YIELD CURVE:  Spread off interpolated node
3MO=5.68, 6MO=5.68, 1YR=5.68, 2YR=5.942, 5YR=6.02, 10YR=6.107, 30YR=6.208

<TABLE>
<CAPTION>
                         0CPR; Ext0mo         0CPR; Ext24mo          25CPR; Ext24mo        50CPR; Ext24mo
                        100% 0% rules;        100% 0% rules;         100% 0% rules;        100% 0% rules;
                           0CDR,35%              0CDR,35%               0CDR,35%              0CDR,35%
                        adv100% lag12         adv100% lag12           adv100% lag12        adv100% lag12
     PRICE                  Yield
- --------------------------------------------------------------------------------------------------------------
<S>                         <C>                 <C>                    <C>                    <C>
     98-16                  7.5788              7.5584                 7.5691                 7.5749
     98-24                  7.5413              7.5251                 7.5339                 7.5383
     99-00                  7.5039              7.4919                 7.4989                 7.5018
     99-08                  7.4667              7.4589                 7.4639                 7.4654
     99-16                  7.4296              7.4259                 7.4291                 7.4292
     99-24                  7.3925              7.3931                 7.3944                 7.3930
     100-00                 7.3557              7.3604                 7.3598                 7.3570
     100-08                 7.3189              7.3278                 7.3254                 7.3211
     100-16                 7.2822              7.2953                 7.2910                 7.2853
     100-24                 7.2457              7.2629                 7.2568                 7.2497
     101-00                 7.2093              7.2306                 7.2227                 7.2141
     101-08                 7.1730              7.1984                 7.1887                 7.1787
     101-16                 7.1368              7.1663                 7.1547                 7.1434
     101-24                 7.1008              7.1343                 7.1210                 7.1081
     102-00                 7.0648              7.1025                 7.0873                 7.0730
     102-08                 7.0290              7.0707                 7.0537                 7.0381
     102-16                 6.9933              7.0390                 7.0202                 7.0032
- --------------------------------------------------------------------------------------------------------------

- --------------------------------------------------------------------------------------------------------------
Spread @ Center Price         118                118                    118                     118
                  WAL       9.76317            11.70230               10.76987               10.12239
             Mod Durn        6.777              7.641                  7.230                   6.940
        Mod Convexity        0.597              0.779                  0.691                   0.630
     Principal Window   Jun09 to Nov09      Oct09 to Nov11         Jun08 to Oct11         Nov07 to Feb11
        Maturity #mos         119                143                    142                     134
     Accrued Interest    1,144,319.73        1,144,319.73           1,144,319.73           1,144,319.73
    Total Collat Loss    0.00 (0.00%)        0.00 (0.00%)           0.00 (0.00%)           0.00 (0.00%)

               Prepay      At 0 CPR            At 0 CPR              At 25 CPR               At 50 CPR
           No prepays
Lockout and penalties   Include penalty    Include penalty        Include penalty         Include penalty

Extension, if balloon        None         Extend 100% 24 mos     Extend 100% 24 mos     Extend 100% 24 mos
      Increase Coupon                      0% for extension       0% for extension       0% for extension
      Pay Exten Princ                     By pre-exten rules     By pre-exten rules     By pre-exten rules

              Default      At 0 CDR            At 0 CDR               At 0 CDR               At 0 CDR
        Loss Severity        0.35                0.35                   0.35                   0.35
    Servicer Advances    100% of P & I      100% of P & I          100% of P & I           100% of P & I
         Recovery Lag       12 mos              12 mos                 12 mos                 12 mos

  Optional Redemption
- --------------------------------------------------------------------------------------------------------------

<CAPTION>
- ---------------------------------------------------------------------
                          75CPR; Ext24mo        100CPR; Ext24mo
                          100% 0% rules;         100% 0% rules;
                             0CDR,35%               0CDR,35%
                          adv100% lag12          adv100% lag12
     PRICE
- ---------------------------------------------------------------------
<S>                           <C>                     <C>
     98-16                    7.5785                  7.5830
     98-24                    7.5411                  7.5447
     99-00                    7.5038                  7.5064
     99-08                    7.4666                  7.4683
     99-16                    7.4296                  7.4303
     99-24                    7.3926                  7.3924
     100-00                   7.3558                  7.3547
     100-08                   7.3191                  7.3171
     100-16                   7.2826                  7.2795
     100-24                   7.2461                  7.2422
     101-00                   7.2098                  7.2049
     101-08                   7.1735                  7.1677
     101-16                   7.1374                  7.1307
     101-24                   7.1014                  7.0938
     102-00                   7.0656                  7.0570
     102-08                   7.0298                  7.0203
     102-16                   6.9941                  6.9837
- ---------------------------------------------------------------------

- ---------------------------------------------------------------------
Spread @ Center Price           118                     118
                  WAL         9.79922                 9.44908
             Mod Durn          6.790                   6.621
        Mod Convexity          0.600                   0.568
     Principal Window     Sep07 to May10          Jul07 to Aug09
        Maturity #mos           125                     116
     Accrued Interest      1,144,319.73            1,144,319.73
    Total Collat Loss      0.00 (0.00%)            0.00 (0.00%)

               Prepay        At 75 CPR              At 100 CPR
           No prepays
Lockout and penalties     Include penalty         Include penalty

Extension, if balloon   Extend 100% 24 mos      Extend 100% 24 mos
      Increase Coupon    0% for extension        0% for extension
      Pay Exten Princ   By pre-exten rules      By pre-exten rules

              Default        At 0 CDR                At 0 CDR
        Loss Severity          0.35                    0.35
    Servicer Advances      100% of P & I           100% of P & I
         Recovery Lag         12 mos                  12 mos

  Optional Redemption
- ---------------------------------------------------------------------
</TABLE>
Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

FUNB-ONLY_RED, Class AAA_2


<TABLE>
<S>                 <C>                 <C>                 <C>                 <C>
CUSIP                                   Face                $353,379,000.00     Settle at Pricing
Coupon              7.286               Original Balance    $353,379,000.00     Accrual begins      12/1/99
Delay               14                  Current Balance     $353,379,000.00     Factor Date         N/A
Stated Maturity     N/A                 Factor              1
Type                SEN FIX             WAL 9.76317 yrs
YIELD CURVE:  Spread off interpolated node
3MO=5.68, 6MO=5.68, 1YR=5.68, 2YR=5.942, 5YR=6.02, 10YR=6.107, 30YR=6.208

Prepay: At 0 CPR     No prepays:      Lockout and penalties: Include penalty
Default: At 0 CDR     Loss Severity: 35%     Servicer Advances: 100% of P & I     Recovery Lag: 12 mos
Extension, if balloon: None     Increase Coupon:      Pay Exten Princ:
Optional Redemption:
</TABLE>

<TABLE>
<CAPTION>
Period / Date                 Principal            Interest           Cash Flow             Balance    Prepay Penalty
<S>                      <C>                 <C>                 <C>                 <C>                         <C>
Total                    353,379,000.00      251,517,162.54      604,896,162.54                                  0.00

  0. Dec 17, 99                    0.00                0.00                0.00      353,379,000.00              0.00
  1. Jan 15, 00                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
  2. Feb 15, 00                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
  3. Mar 15, 00                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
  4. Apr 15, 00                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
  5. May 15, 00                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
  6. Jun 15, 00                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
  7. Jul 15, 00                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
  8. Aug 15, 00                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
  9. Sep 15, 00                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 10. Oct 15, 00                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 11. Nov 15, 00                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00

<CAPTION>
Period / Date          Princ Writedown    Accrued Interest  Interest Shortfall      Coupon
<S>                               <C>       <C>                           <C>       <C>
Total                             0.00      251,517,162.54                0.00

  0. Dec 17, 99                   0.00                0.00                0.00      0.0000
  1. Jan 15, 00                   0.00        2,145,599.50                0.00      7.2860
  2. Feb 15, 00                   0.00        2,145,599.50                0.00      7.2860
  3. Mar 15, 00                   0.00        2,145,599.50                0.00      7.2860
  4. Apr 15, 00                   0.00        2,145,599.50                0.00      7.2860
  5. May 15, 00                   0.00        2,145,599.50                0.00      7.2860
  6. Jun 15, 00                   0.00        2,145,599.50                0.00      7.2860
  7. Jul 15, 00                   0.00        2,145,599.50                0.00      7.2860
  8. Aug 15, 00                   0.00        2,145,599.50                0.00      7.2860
  9. Sep 15, 00                   0.00        2,145,599.50                0.00      7.2860
 10. Oct 15, 00                   0.00        2,145,599.50                0.00      7.2860
 11. Nov 15, 00                   0.00        2,145,599.50                0.00      7.2860
</TABLE>

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<TABLE>
<S>                      <C>                 <C>                 <C>                 <C>                         <C>
 12. Dec 15, 00                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 13. Jan 15, 01                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 14. Feb 15, 01                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 15. Mar 15, 01                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 16. Apr 15, 01                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 17. May 15, 01                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 18. Jun 15, 01                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 19. Jul 15, 01                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 20. Aug 15, 01                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 21. Sep 15, 01                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 22. Oct 15, 01                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 23. Nov 15, 01                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 24. Dec 15, 01                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 25. Jan 15, 02                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 26. Feb 15, 02                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 27. Mar 15, 02                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 28. Apr 15, 02                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 29. May 15, 02                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 30. Jun 15, 02                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 31. Jul 15, 02                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 32. Aug 15, 02                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 33. Sep 15, 02                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 34. Oct 15, 02                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 35. Nov 15, 02                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 36. Dec 15, 02                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 37. Jan 15, 03                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 38. Feb 15, 03                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 39. Mar 15, 03                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 40. Apr 15, 03                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 41. May 15, 03                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00

<CAPTION>
<S>                    <C>       <C>                           <C>       <C>
 12. Dec 15, 00        0.00        2,145,599.50                0.00      7.2860
 13. Jan 15, 01        0.00        2,145,599.50                0.00      7.2860
 14. Feb 15, 01        0.00        2,145,599.50                0.00      7.2860
 15. Mar 15, 01        0.00        2,145,599.50                0.00      7.2860
 16. Apr 15, 01        0.00        2,145,599.50                0.00      7.2860
 17. May 15, 01        0.00        2,145,599.50                0.00      7.2860
 18. Jun 15, 01        0.00        2,145,599.50                0.00      7.2860
 19. Jul 15, 01        0.00        2,145,599.50                0.00      7.2860
 20. Aug 15, 01        0.00        2,145,599.50                0.00      7.2860
 21. Sep 15, 01        0.00        2,145,599.50                0.00      7.2860
 22. Oct 15, 01        0.00        2,145,599.50                0.00      7.2860
 23. Nov 15, 01        0.00        2,145,599.50                0.00      7.2860
 24. Dec 15, 01        0.00        2,145,599.50                0.00      7.2860
 25. Jan 15, 02        0.00        2,145,599.50                0.00      7.2860
 26. Feb 15, 02        0.00        2,145,599.50                0.00      7.2860
 27. Mar 15, 02        0.00        2,145,599.50                0.00      7.2860
 28. Apr 15, 02        0.00        2,145,599.50                0.00      7.2860
 29. May 15, 02        0.00        2,145,599.50                0.00      7.2860
 30. Jun 15, 02        0.00        2,145,599.50                0.00      7.2860
 31. Jul 15, 02        0.00        2,145,599.50                0.00      7.2860
 32. Aug 15, 02        0.00        2,145,599.50                0.00      7.2860
 33. Sep 15, 02        0.00        2,145,599.50                0.00      7.2860
 34. Oct 15, 02        0.00        2,145,599.50                0.00      7.2860
 35. Nov 15, 02        0.00        2,145,599.50                0.00      7.2860
 36. Dec 15, 02        0.00        2,145,599.50                0.00      7.2860
 37. Jan 15, 03        0.00        2,145,599.50                0.00      7.2860
 38. Feb 15, 03        0.00        2,145,599.50                0.00      7.2860
 39. Mar 15, 03        0.00        2,145,599.50                0.00      7.2860
 40. Apr 15, 03        0.00        2,145,599.50                0.00      7.2860
 41. May 15, 03        0.00        2,145,599.50                0.00      7.2860
</TABLE>

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<TABLE>
<S>                      <C>                 <C>                 <C>                 <C>                         <C>
 42. Jun 15, 03                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 43. Jul 15, 03                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 44. Aug 15, 03                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 45. Sep 15, 03                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 46. Oct 15, 03                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 47. Nov 15, 03                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 48. Dec 15, 03                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 49. Jan 15, 04                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 50. Feb 15, 04                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 51. Mar 15, 04                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 52. Apr 15, 04                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 53. May 15, 04                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 54. Jun 15, 04                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 55. Jul 15, 04                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 56. Aug 15, 04                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 57. Sep 15, 04                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 58. Oct 15, 04                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 59. Nov 15, 04                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 60. Dec 15, 04                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 61. Jan 15, 05                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 62. Feb 15, 05                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 63. Mar 15, 05                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 64. Apr 15, 05                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 65. May 15, 05                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 66. Jun 15, 05                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 67. Jul 15, 05                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 68. Aug 15, 05                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 69. Sep 15, 05                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 70. Oct 15, 05                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 71. Nov 15, 05                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00

<CAPTION>
<S>                      <C>       <C>                           <C>       <C>
 42. Jun 15, 03          0.00        2,145,599.50                0.00      7.2860
 43. Jul 15, 03          0.00        2,145,599.50                0.00      7.2860
 44. Aug 15, 03          0.00        2,145,599.50                0.00      7.2860
 45. Sep 15, 03          0.00        2,145,599.50                0.00      7.2860
 46. Oct 15, 03          0.00        2,145,599.50                0.00      7.2860
 47. Nov 15, 03          0.00        2,145,599.50                0.00      7.2860
 48. Dec 15, 03          0.00        2,145,599.50                0.00      7.2860
 49. Jan 15, 04          0.00        2,145,599.50                0.00      7.2860
 50. Feb 15, 04          0.00        2,145,599.50                0.00      7.2860
 51. Mar 15, 04          0.00        2,145,599.50                0.00      7.2860
 52. Apr 15, 04          0.00        2,145,599.50                0.00      7.2860
 53. May 15, 04          0.00        2,145,599.50                0.00      7.2860
 54. Jun 15, 04          0.00        2,145,599.50                0.00      7.2860
 55. Jul 15, 04          0.00        2,145,599.50                0.00      7.2860
 56. Aug 15, 04          0.00        2,145,599.50                0.00      7.2860
 57. Sep 15, 04          0.00        2,145,599.50                0.00      7.2860
 58. Oct 15, 04          0.00        2,145,599.50                0.00      7.2860
 59. Nov 15, 04          0.00        2,145,599.50                0.00      7.2860
 60. Dec 15, 04          0.00        2,145,599.50                0.00      7.2860
 61. Jan 15, 05          0.00        2,145,599.50                0.00      7.2860
 62. Feb 15, 05          0.00        2,145,599.50                0.00      7.2860
 63. Mar 15, 05          0.00        2,145,599.50                0.00      7.2860
 64. Apr 15, 05          0.00        2,145,599.50                0.00      7.2860
 65. May 15, 05          0.00        2,145,599.50                0.00      7.2860
 66. Jun 15, 05          0.00        2,145,599.50                0.00      7.2860
 67. Jul 15, 05          0.00        2,145,599.50                0.00      7.2860
 68. Aug 15, 05          0.00        2,145,599.50                0.00      7.2860
 69. Sep 15, 05          0.00        2,145,599.50                0.00      7.2860
 70. Oct 15, 05          0.00        2,145,599.50                0.00      7.2860
 71. Nov 15, 05          0.00        2,145,599.50                0.00      7.2860
</TABLE>

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<TABLE>
<S>                      <C>                 <C>                 <C>                 <C>                         <C>
 72. Dec 15, 05                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 73. Jan 15, 06                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 74. Feb 15, 06                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 75. Mar 15, 06                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 76. Apr 15, 06                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 77. May 15, 06                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 78. Jun 15, 06                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 79. Jul 15, 06                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 80. Aug 15, 06                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 81. Sep 15, 06                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 82. Oct 15, 06                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 83. Nov 15, 06                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 84. Dec 15, 06                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 85. Jan 15, 07                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 86. Feb 15, 07                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 87. Mar 15, 07                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 88. Apr 15, 07                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 89. May 15, 07                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 90. Jun 15, 07                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 91. Jul 15, 07                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 92. Aug 15, 07                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 93. Sep 15, 07                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 94. Oct 15, 07                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 95. Nov 15, 07                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 96. Dec 15, 07                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 97. Jan 15, 08                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 98. Feb 15, 08                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 99. Mar 15, 08                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
100. Apr 15, 08                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
101. May 15, 08                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00

<CAPTION>
<S>                      <C>       <C>                           <C>       <C>
 72. Dec 15, 05          0.00        2,145,599.50                0.00      7.2860
 73. Jan 15, 06          0.00        2,145,599.50                0.00      7.2860
 74. Feb 15, 06          0.00        2,145,599.50                0.00      7.2860
 75. Mar 15, 06          0.00        2,145,599.50                0.00      7.2860
 76. Apr 15, 06          0.00        2,145,599.50                0.00      7.2860
 77. May 15, 06          0.00        2,145,599.50                0.00      7.2860
 78. Jun 15, 06          0.00        2,145,599.50                0.00      7.2860
 79. Jul 15, 06          0.00        2,145,599.50                0.00      7.2860
 80. Aug 15, 06          0.00        2,145,599.50                0.00      7.2860
 81. Sep 15, 06          0.00        2,145,599.50                0.00      7.2860
 82. Oct 15, 06          0.00        2,145,599.50                0.00      7.2860
 83. Nov 15, 06          0.00        2,145,599.50                0.00      7.2860
 84. Dec 15, 06          0.00        2,145,599.50                0.00      7.2860
 85. Jan 15, 07          0.00        2,145,599.50                0.00      7.2860
 86. Feb 15, 07          0.00        2,145,599.50                0.00      7.2860
 87. Mar 15, 07          0.00        2,145,599.50                0.00      7.2860
 88. Apr 15, 07          0.00        2,145,599.50                0.00      7.2860
 89. May 15, 07          0.00        2,145,599.50                0.00      7.2860
 90. Jun 15, 07          0.00        2,145,599.50                0.00      7.2860
 91. Jul 15, 07          0.00        2,145,599.50                0.00      7.2860
 92. Aug 15, 07          0.00        2,145,599.50                0.00      7.2860
 93. Sep 15, 07          0.00        2,145,599.50                0.00      7.2860
 94. Oct 15, 07          0.00        2,145,599.50                0.00      7.2860
 95. Nov 15, 07          0.00        2,145,599.50                0.00      7.2860
 96. Dec 15, 07          0.00        2,145,599.50                0.00      7.2860
 97. Jan 15, 08          0.00        2,145,599.50                0.00      7.2860
 98. Feb 15, 08          0.00        2,145,599.50                0.00      7.2860
 99. Mar 15, 08          0.00        2,145,599.50                0.00      7.2860
100. Apr 15, 08          0.00        2,145,599.50                0.00      7.2860
101. May 15, 08          0.00        2,145,599.50                0.00      7.2860
</TABLE>

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<TABLE>
<S>                      <C>                 <C>                 <C>                 <C>                         <C>
102. Jun 15, 08                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
103. Jul 15, 08                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
104. Aug 15, 08                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
105. Sep 15, 08                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
106. Oct 15, 08                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
107. Nov 15, 08                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
108. Dec 15, 08                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
109. Jan 15, 09                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
110. Feb 15, 09                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
111. Mar 15, 09                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
112. Apr 15, 09                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
113. May 15, 09                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
114. Jun 15, 09              550,179.54        2,145,599.50        2,695,779.04      352,828,820.46              0.00
115. Jul 15, 09           32,318,425.37        2,142,258.99       34,460,684.36      320,510,395.08              0.00
116. Aug 15, 09           24,754,543.99        1,946,032.28       26,700,576.27      295,755,851.10              0.00
117. Sep 15, 09          135,143,541.80        1,795,730.94      136,939,272.74      160,612,309.30              0.00
118. Oct 15, 09          150,794,001.91          975,184.40      151,769,186.32        9,818,307.39              0.00
119. Nov 15, 09            9,818,307.39           59,613.49        9,877,920.88                0.00              0.00

<CAPTION>
<S>                    <C>       <C>                           <C>       <C>
102. Jun 15, 08        0.00        2,145,599.50                0.00      7.2860
103. Jul 15, 08        0.00        2,145,599.50                0.00      7.2860
104. Aug 15, 08        0.00        2,145,599.50                0.00      7.2860
105. Sep 15, 08        0.00        2,145,599.50                0.00      7.2860
106. Oct 15, 08        0.00        2,145,599.50                0.00      7.2860
107. Nov 15, 08        0.00        2,145,599.50                0.00      7.2860
108. Dec 15, 08        0.00        2,145,599.50                0.00      7.2860
109. Jan 15, 09        0.00        2,145,599.50                0.00      7.2860
110. Feb 15, 09        0.00        2,145,599.50                0.00      7.2860
111. Mar 15, 09        0.00        2,145,599.50                0.00      7.2860
112. Apr 15, 09        0.00        2,145,599.50                0.00      7.2860
113. May 15, 09        0.00        2,145,599.50                0.00      7.2860
114. Jun 15, 09        0.00        2,145,599.50                0.00      7.2860
115. Jul 15, 09        0.00        2,142,258.99                0.00      7.2860
116. Aug 15, 09        0.00        1,946,032.28                0.00      7.2860
117. Sep 15, 09        0.00        1,795,730.94                0.00      7.2860
118. Oct 15, 09        0.00          975,184.40                0.00      7.2860
119. Nov 15, 09        0.00           59,613.49                0.00      7.2860
</TABLE>

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

FUNB-ONLY_RED, Class AAA_2

<TABLE>
<S>                 <C>                 <C>                 <C>                 <C>
CUSIP                                   Face                $353,379,000.00     Settle at Pricing
Coupon              7.286               Original Balance    $353,379,000.00     Accrual begins      12/1/99
Delay               14                  Current Balance     $353,379,000.00     Factor Date         N/A
Stated Maturity     N/A                 Factor              1
Type                SEN FIX             WAL 9.44908 yrs
YIELD CURVE:  Spread off interpolated node
3MO=5.68, 6MO=5.68, 1YR=5.68, 2YR=5.942, 5YR=6.02, 10YR=6.107, 30YR=6.208

Prepay: At 100 CPR     No prepays:      Lockout and penalties: Include penalty
Default: At 0 CDR     Loss Severity: 35%     Servicer Advances: 100% of P & I     Recovery Lag: 12 mos
Extension, if balloon: None     Increase Coupon:      Pay Exten Princ:
Optional Redemption:
</TABLE>

<TABLE>
<CAPTION>
Period / Date                 Principal            Interest           Cash Flow             Balance    Prepay Penalty
<S>                      <C>                 <C>                 <C>                 <C>                         <C>
Total                    353,379,000.00      243,430,409.60      596,809,409.60                                  0.00

  0. Dec 17, 99                    0.00                0.00                0.00      353,379,000.00              0.00
  1. Jan 15, 00                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
  2. Feb 15, 00                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
  3. Mar 15, 00                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
  4. Apr 15, 00                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
  5. May 15, 00                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
  6. Jun 15, 00                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
  7. Jul 15, 00                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
  8. Aug 15, 00                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
  9. Sep 15, 00                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 10. Oct 15, 00                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 11. Nov 15, 00                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00

<CAPTION>
Period / Date         Princ Writedown    Accrued Interest  Interest Shortfall      Coupon
<S>                              <C>       <C>                           <C>       <C>
Total                            0.00      243,430,409.60                0.00

  0. Dec 17, 99                  0.00                0.00                0.00      0.0000
  1. Jan 15, 00                  0.00        2,145,599.50                0.00      7.2860
  2. Feb 15, 00                  0.00        2,145,599.50                0.00      7.2860
  3. Mar 15, 00                  0.00        2,145,599.50                0.00      7.2860
  4. Apr 15, 00                  0.00        2,145,599.50                0.00      7.2860
  5. May 15, 00                  0.00        2,145,599.50                0.00      7.2860
  6. Jun 15, 00                  0.00        2,145,599.50                0.00      7.2860
  7. Jul 15, 00                  0.00        2,145,599.50                0.00      7.2860
  8. Aug 15, 00                  0.00        2,145,599.50                0.00      7.2860
  9. Sep 15, 00                  0.00        2,145,599.50                0.00      7.2860
 10. Oct 15, 00                  0.00        2,145,599.50                0.00      7.2860
 11. Nov 15, 00                  0.00        2,145,599.50                0.00      7.2860
</TABLE>

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<TABLE>
<S>                      <C>                 <C>                 <C>                 <C>                         <C>
 12. Dec 15, 00                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 13. Jan 15, 01                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 14. Feb 15, 01                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 15. Mar 15, 01                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 16. Apr 15, 01                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 17. May 15, 01                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 18. Jun 15, 01                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 19. Jul 15, 01                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 20. Aug 15, 01                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 21. Sep 15, 01                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 22. Oct 15, 01                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 23. Nov 15, 01                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 24. Dec 15, 01                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 25. Jan 15, 02                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 26. Feb 15, 02                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 27. Mar 15, 02                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 28. Apr 15, 02                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 29. May 15, 02                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 30. Jun 15, 02                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 31. Jul 15, 02                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 32. Aug 15, 02                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 33. Sep 15, 02                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 34. Oct 15, 02                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 35. Nov 15, 02                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 36. Dec 15, 02                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 37. Jan 15, 03                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 38. Feb 15, 03                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 39. Mar 15, 03                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 40. Apr 15, 03                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 41. May 15, 03                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00

<CAPTION>
<S>                      <C>       <C>                           <C>       <C>
 12. Dec 15, 00          0.00        2,145,599.50                0.00      7.2860
 13. Jan 15, 01          0.00        2,145,599.50                0.00      7.2860
 14. Feb 15, 01          0.00        2,145,599.50                0.00      7.2860
 15. Mar 15, 01          0.00        2,145,599.50                0.00      7.2860
 16. Apr 15, 01          0.00        2,145,599.50                0.00      7.2860
 17. May 15, 01          0.00        2,145,599.50                0.00      7.2860
 18. Jun 15, 01          0.00        2,145,599.50                0.00      7.2860
 19. Jul 15, 01          0.00        2,145,599.50                0.00      7.2860
 20. Aug 15, 01          0.00        2,145,599.50                0.00      7.2860
 21. Sep 15, 01          0.00        2,145,599.50                0.00      7.2860
 22. Oct 15, 01          0.00        2,145,599.50                0.00      7.2860
 23. Nov 15, 01          0.00        2,145,599.50                0.00      7.2860
 24. Dec 15, 01          0.00        2,145,599.50                0.00      7.2860
 25. Jan 15, 02          0.00        2,145,599.50                0.00      7.2860
 26. Feb 15, 02          0.00        2,145,599.50                0.00      7.2860
 27. Mar 15, 02          0.00        2,145,599.50                0.00      7.2860
 28. Apr 15, 02          0.00        2,145,599.50                0.00      7.2860
 29. May 15, 02          0.00        2,145,599.50                0.00      7.2860
 30. Jun 15, 02          0.00        2,145,599.50                0.00      7.2860
 31. Jul 15, 02          0.00        2,145,599.50                0.00      7.2860
 32. Aug 15, 02          0.00        2,145,599.50                0.00      7.2860
 33. Sep 15, 02          0.00        2,145,599.50                0.00      7.2860
 34. Oct 15, 02          0.00        2,145,599.50                0.00      7.2860
 35. Nov 15, 02          0.00        2,145,599.50                0.00      7.2860
 36. Dec 15, 02          0.00        2,145,599.50                0.00      7.2860
 37. Jan 15, 03          0.00        2,145,599.50                0.00      7.2860
 38. Feb 15, 03          0.00        2,145,599.50                0.00      7.2860
 39. Mar 15, 03          0.00        2,145,599.50                0.00      7.2860
 40. Apr 15, 03          0.00        2,145,599.50                0.00      7.2860
 41. May 15, 03          0.00        2,145,599.50                0.00      7.2860
</TABLE>

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<TABLE>
<S>                      <C>                 <C>                 <C>                 <C>                         <C>
 42. Jun 15, 03                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 43. Jul 15, 03                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 44. Aug 15, 03                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 45. Sep 15, 03                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 46. Oct 15, 03                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 47. Nov 15, 03                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 48. Dec 15, 03                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 49. Jan 15, 04                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 50. Feb 15, 04                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 51. Mar 15, 04                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 52. Apr 15, 04                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 53. May 15, 04                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 54. Jun 15, 04                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 55. Jul 15, 04                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 56. Aug 15, 04                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 57. Sep 15, 04                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 58. Oct 15, 04                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 59. Nov 15, 04                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 60. Dec 15, 04                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 61. Jan 15, 05                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 62. Feb 15, 05                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 63. Mar 15, 05                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 64. Apr 15, 05                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 65. May 15, 05                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 66. Jun 15, 05                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 67. Jul 15, 05                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 68. Aug 15, 05                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 69. Sep 15, 05                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 70. Oct 15, 05                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 71. Nov 15, 05                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00

<CAPTION>
<S>                      <C>       <C>                           <C>       <C>
 42. Jun 15, 03          0.00        2,145,599.50                0.00      7.2860
 43. Jul 15, 03          0.00        2,145,599.50                0.00      7.2860
 44. Aug 15, 03          0.00        2,145,599.50                0.00      7.2860
 45. Sep 15, 03          0.00        2,145,599.50                0.00      7.2860
 46. Oct 15, 03          0.00        2,145,599.50                0.00      7.2860
 47. Nov 15, 03          0.00        2,145,599.50                0.00      7.2860
 48. Dec 15, 03          0.00        2,145,599.50                0.00      7.2860
 49. Jan 15, 04          0.00        2,145,599.50                0.00      7.2860
 50. Feb 15, 04          0.00        2,145,599.50                0.00      7.2860
 51. Mar 15, 04          0.00        2,145,599.50                0.00      7.2860
 52. Apr 15, 04          0.00        2,145,599.50                0.00      7.2860
 53. May 15, 04          0.00        2,145,599.50                0.00      7.2860
 54. Jun 15, 04          0.00        2,145,599.50                0.00      7.2860
 55. Jul 15, 04          0.00        2,145,599.50                0.00      7.2860
 56. Aug 15, 04          0.00        2,145,599.50                0.00      7.2860
 57. Sep 15, 04          0.00        2,145,599.50                0.00      7.2860
 58. Oct 15, 04          0.00        2,145,599.50                0.00      7.2860
 59. Nov 15, 04          0.00        2,145,599.50                0.00      7.2860
 60. Dec 15, 04          0.00        2,145,599.50                0.00      7.2860
 61. Jan 15, 05          0.00        2,145,599.50                0.00      7.2860
 62. Feb 15, 05          0.00        2,145,599.50                0.00      7.2860
 63. Mar 15, 05          0.00        2,145,599.50                0.00      7.2860
 64. Apr 15, 05          0.00        2,145,599.50                0.00      7.2860
 65. May 15, 05          0.00        2,145,599.50                0.00      7.2860
 66. Jun 15, 05          0.00        2,145,599.50                0.00      7.2860
 67. Jul 15, 05          0.00        2,145,599.50                0.00      7.2860
 68. Aug 15, 05          0.00        2,145,599.50                0.00      7.2860
 69. Sep 15, 05          0.00        2,145,599.50                0.00      7.2860
 70. Oct 15, 05          0.00        2,145,599.50                0.00      7.2860
 71. Nov 15, 05          0.00        2,145,599.50                0.00      7.2860
</TABLE>

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<TABLE>
<S>                      <C>                 <C>                 <C>                 <C>                         <C>
 72. Dec 15, 05                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 73. Jan 15, 06                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 74. Feb 15, 06                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 75. Mar 15, 06                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 76. Apr 15, 06                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 77. May 15, 06                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 78. Jun 15, 06                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 79. Jul 15, 06                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 80. Aug 15, 06                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 81. Sep 15, 06                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 82. Oct 15, 06                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 83. Nov 15, 06                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 84. Dec 15, 06                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 85. Jan 15, 07                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 86. Feb 15, 07                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 87. Mar 15, 07                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 88. Apr 15, 07                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 89. May 15, 07                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 90. Jun 15, 07                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 91. Jul 15, 07           15,133,216.42        2,145,599.50       17,278,815.91      338,245,783.58              0.00
 92. Aug 15, 07              499,117.87        2,053,715.65        2,552,833.52      337,746,665.72              0.00
 93. Sep 15, 07              502,619.25        2,050,685.17        2,553,304.42      337,244,046.47              0.00
 94. Oct 15, 07              611,520.55        2,047,633.44        2,659,153.98      336,632,525.92              0.00
 95. Nov 15, 07              510,435.24        2,043,920.49        2,554,355.72      336,122,090.68              0.00
 96. Dec 15, 07              619,138.94        2,040,821.29        2,659,960.24      335,502,951.74              0.00
 97. Jan 15, 08              518,359.65        2,037,062.09        2,555,421.74      334,984,592.09              0.00
 98. Feb 15, 08              521,996.21        2,033,914.78        2,555,910.99      334,462,595.88              0.00
 99. Mar 15, 08              735,157.11        2,030,745.39        2,765,902.51      333,727,438.77              0.00
100. Apr 15, 08              530,815.87        2,026,281.77        2,557,097.63      333,196,622.90              0.00
101. May 15, 08              639,004.28        2,023,058.83        2,662,063.11      332,557,618.62              0.00

<CAPTION>
<S>                      <C>       <C>                           <C>       <C>
 72. Dec 15, 05          0.00        2,145,599.50                0.00      7.2860
 73. Jan 15, 06          0.00        2,145,599.50                0.00      7.2860
 74. Feb 15, 06          0.00        2,145,599.50                0.00      7.2860
 75. Mar 15, 06          0.00        2,145,599.50                0.00      7.2860
 76. Apr 15, 06          0.00        2,145,599.50                0.00      7.2860
 77. May 15, 06          0.00        2,145,599.50                0.00      7.2860
 78. Jun 15, 06          0.00        2,145,599.50                0.00      7.2860
 79. Jul 15, 06          0.00        2,145,599.50                0.00      7.2860
 80. Aug 15, 06          0.00        2,145,599.50                0.00      7.2860
 81. Sep 15, 06          0.00        2,145,599.50                0.00      7.2860
 82. Oct 15, 06          0.00        2,145,599.50                0.00      7.2860
 83. Nov 15, 06          0.00        2,145,599.50                0.00      7.2860
 84. Dec 15, 06          0.00        2,145,599.50                0.00      7.2860
 85. Jan 15, 07          0.00        2,145,599.50                0.00      7.2860
 86. Feb 15, 07          0.00        2,145,599.50                0.00      7.2860
 87. Mar 15, 07          0.00        2,145,599.50                0.00      7.2860
 88. Apr 15, 07          0.00        2,145,599.50                0.00      7.2860
 89. May 15, 07          0.00        2,145,599.50                0.00      7.2860
 90. Jun 15, 07          0.00        2,145,599.50                0.00      7.2860
 91. Jul 15, 07          0.00        2,145,599.50                0.00      7.2860
 92. Aug 15, 07          0.00        2,053,715.65                0.00      7.2860
 93. Sep 15, 07          0.00        2,050,685.17                0.00      7.2860
 94. Oct 15, 07          0.00        2,047,633.44                0.00      7.2860
 95. Nov 15, 07          0.00        2,043,920.49                0.00      7.2860
 96. Dec 15, 07          0.00        2,040,821.29                0.00      7.2860
 97. Jan 15, 08          0.00        2,037,062.09                0.00      7.2860
 98. Feb 15, 08          0.00        2,033,914.78                0.00      7.2860
 99. Mar 15, 08          0.00        2,030,745.39                0.00      7.2860
100. Apr 15, 08          0.00        2,026,281.77                0.00      7.2860
101. May 15, 08          0.00        2,023,058.83                0.00      7.2860
</TABLE>

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<TABLE>
<S>                      <C>                 <C>                 <C>                 <C>                         <C>
102. Jun 15, 08              539,023.02        2,019,179.01        2,558,202.03      332,018,595.60              0.00
103. Jul 15, 08              647,003.96        2,015,906.24        2,662,910.20      331,371,591.65              0.00
104. Aug 15, 08              547,344.04        2,011,977.85        2,559,321.89      330,824,247.61              0.00
105. Sep 15, 08            3,566,839.62        2,008,654.56        5,575,494.18      327,257,407.98              0.00
106. Oct 15, 08              655,469.88        1,986,997.90        2,642,467.77      326,601,938.11              0.00
107. Nov 15, 08              556,872.22        1,983,018.10        2,539,890.32      326,045,065.88              0.00
108. Dec 15, 08              663,707.61        1,979,636.96        2,643,344.57      325,381,358.27              0.00
109. Jan 15, 09              565,440.88        1,975,607.15        2,541,048.03      324,815,917.39              0.00
110. Feb 15, 09              569,410.45        1,972,173.98        2,541,584.42      324,246,506.95              0.00
111. Mar 15, 09            5,098,388.19        1,968,716.71        7,067,104.90      319,148,118.76              0.00
112. Apr 15, 09           11,674,534.55        1,937,760.99       13,612,295.55      307,473,584.21              0.00
113. May 15, 09           32,348,787.93        1,866,877.11       34,215,665.04      275,124,796.28              0.00
114. Jun 15, 09           25,794,927.46        1,670,466.05       27,465,393.51      249,329,868.82              0.00
115. Jul 15, 09          104,032,662.28        1,513,847.85      105,546,510.13      145,297,206.55              0.00
116. Aug 15, 09          145,297,206.55          882,196.21      146,179,402.75                0.00              0.00

<CAPTION>
<S>                   <C>       <C>                           <C>       <C>
102. Jun 15, 08       0.00        2,019,179.01                0.00      7.2860
103. Jul 15, 08       0.00        2,015,906.24                0.00      7.2860
104. Aug 15, 08       0.00        2,011,977.85                0.00      7.2860
105. Sep 15, 08       0.00        2,008,654.56                0.00      7.2860
106. Oct 15, 08       0.00        1,986,997.90                0.00      7.2860
107. Nov 15, 08       0.00        1,983,018.10                0.00      7.2860
108. Dec 15, 08       0.00        1,979,636.96                0.00      7.2860
109. Jan 15, 09       0.00        1,975,607.15                0.00      7.2860
110. Feb 15, 09       0.00        1,972,173.98                0.00      7.2860
111. Mar 15, 09       0.00        1,968,716.71                0.00      7.2860
112. Apr 15, 09       0.00        1,937,760.99                0.00      7.2860
113. May 15, 09       0.00        1,866,877.11                0.00      7.2860
114. Jun 15, 09       0.00        1,670,466.05                0.00      7.2860
115. Jul 15, 09       0.00        1,513,847.85                0.00      7.2860
116. Aug 15, 09       0.00          882,196.21                0.00      7.2860
</TABLE>

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.


FUNB-ONLY_RED, Class AAA_2


<TABLE>
<S>                 <C>                 <C>                 <C>                 <C>
CUSIP                                   Face                $353,379,000.00     Settle at Pricing
Coupon              7.286               Original Balance    $353,379,000.00     Accrual begins      12/1/99
Delay               14                  Current Balance     $353,379,000.00     Factor Date         N/A
Stated Maturity     N/A                 Factor              1
Type                SEN FIX             WAL 11.70230 yrs
YIELD CURVE:  Spread off interpolated node
3MO=5.68, 6MO=5.68, 1YR=5.68, 2YR=5.942, 5YR=6.02, 10YR=6.107, 30YR=6.208

Prepay: At 0 CPR     No prepays:      Lockout and penalties: Include penalty
Default: At 0 CDR     Loss Severity: 35%     Servicer Advances: 100% of P & I     Recovery Lag: 12 mos
Extension, if balloon: Extend 100% 24 mos     Increase Coupon: 0% for extension     Pay Exten Princ: By pre-exten rules
Optional Redemption:
</TABLE>

<TABLE>
<CAPTION>
Period / Date                 Principal            Interest           Cash Flow             Balance    Prepay Penalty
<S>                      <C>                 <C>                 <C>                 <C>                         <C>
Total                    353,379,000.00      301,444,369.03      654,823,369.03                                  0.00

  0. Dec 17, 99                    0.00                0.00                0.00      353,379,000.00              0.00
  1. Jan 15, 00                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
  2. Feb 15, 00                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
  3. Mar 15, 00                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
  4. Apr 15, 00                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
  5. May 15, 00                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
  6. Jun 15, 00                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
  7. Jul 15, 00                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
  8. Aug 15, 00                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
  9. Sep 15, 00                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 10. Oct 15, 00                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 11. Nov 15, 00                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00

<CAPTION>
Period / Date          Princ Writedown    Accrued Interest  Interest Shortfall      Coupon
<S>                               <C>       <C>                           <C>       <C>
Total                             0.00      301,444,369.03                0.00

  0. Dec 17, 99                   0.00                0.00                0.00      0.0000
  1. Jan 15, 00                   0.00        2,145,599.50                0.00      7.2860
  2. Feb 15, 00                   0.00        2,145,599.50                0.00      7.2860
  3. Mar 15, 00                   0.00        2,145,599.50                0.00      7.2860
  4. Apr 15, 00                   0.00        2,145,599.50                0.00      7.2860
  5. May 15, 00                   0.00        2,145,599.50                0.00      7.2860
  6. Jun 15, 00                   0.00        2,145,599.50                0.00      7.2860
  7. Jul 15, 00                   0.00        2,145,599.50                0.00      7.2860
  8. Aug 15, 00                   0.00        2,145,599.50                0.00      7.2860
  9. Sep 15, 00                   0.00        2,145,599.50                0.00      7.2860
 10. Oct 15, 00                   0.00        2,145,599.50                0.00      7.2860
 11. Nov 15, 00                   0.00        2,145,599.50                0.00      7.2860
</TABLE>

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<TABLE>
<S>                      <C>                 <C>                 <C>                 <C>                         <C>
 12. Dec 15, 00                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 13. Jan 15, 01                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 14. Feb 15, 01                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 15. Mar 15, 01                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 16. Apr 15, 01                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 17. May 15, 01                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 18. Jun 15, 01                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 19. Jul 15, 01                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 20. Aug 15, 01                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 21. Sep 15, 01                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 22. Oct 15, 01                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 23. Nov 15, 01                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 24. Dec 15, 01                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 25. Jan 15, 02                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 26. Feb 15, 02                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 27. Mar 15, 02                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 28. Apr 15, 02                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 29. May 15, 02                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 30. Jun 15, 02                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 31. Jul 15, 02                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 32. Aug 15, 02                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 33. Sep 15, 02                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 34. Oct 15, 02                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 35. Nov 15, 02                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 36. Dec 15, 02                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 37. Jan 15, 03                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 38. Feb 15, 03                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 39. Mar 15, 03                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 40. Apr 15, 03                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 41. May 15, 03                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00

<CAPTION>
<S>                      <C>       <C>                           <C>       <C>
 12. Dec 15, 00          0.00        2,145,599.50                0.00      7.2860
 13. Jan 15, 01          0.00        2,145,599.50                0.00      7.2860
 14. Feb 15, 01          0.00        2,145,599.50                0.00      7.2860
 15. Mar 15, 01          0.00        2,145,599.50                0.00      7.2860
 16. Apr 15, 01          0.00        2,145,599.50                0.00      7.2860
 17. May 15, 01          0.00        2,145,599.50                0.00      7.2860
 18. Jun 15, 01          0.00        2,145,599.50                0.00      7.2860
 19. Jul 15, 01          0.00        2,145,599.50                0.00      7.2860
 20. Aug 15, 01          0.00        2,145,599.50                0.00      7.2860
 21. Sep 15, 01          0.00        2,145,599.50                0.00      7.2860
 22. Oct 15, 01          0.00        2,145,599.50                0.00      7.2860
 23. Nov 15, 01          0.00        2,145,599.50                0.00      7.2860
 24. Dec 15, 01          0.00        2,145,599.50                0.00      7.2860
 25. Jan 15, 02          0.00        2,145,599.50                0.00      7.2860
 26. Feb 15, 02          0.00        2,145,599.50                0.00      7.2860
 27. Mar 15, 02          0.00        2,145,599.50                0.00      7.2860
 28. Apr 15, 02          0.00        2,145,599.50                0.00      7.2860
 29. May 15, 02          0.00        2,145,599.50                0.00      7.2860
 30. Jun 15, 02          0.00        2,145,599.50                0.00      7.2860
 31. Jul 15, 02          0.00        2,145,599.50                0.00      7.2860
 32. Aug 15, 02          0.00        2,145,599.50                0.00      7.2860
 33. Sep 15, 02          0.00        2,145,599.50                0.00      7.2860
 34. Oct 15, 02          0.00        2,145,599.50                0.00      7.2860
 35. Nov 15, 02          0.00        2,145,599.50                0.00      7.2860
 36. Dec 15, 02          0.00        2,145,599.50                0.00      7.2860
 37. Jan 15, 03          0.00        2,145,599.50                0.00      7.2860
 38. Feb 15, 03          0.00        2,145,599.50                0.00      7.2860
 39. Mar 15, 03          0.00        2,145,599.50                0.00      7.2860
 40. Apr 15, 03          0.00        2,145,599.50                0.00      7.2860
 41. May 15, 03          0.00        2,145,599.50                0.00      7.2860
</TABLE>

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<TABLE>
<S>                      <C>                 <C>                 <C>                 <C>                         <C>
 42. Jun 15, 03                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 43. Jul 15, 03                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 44. Aug 15, 03                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 45. Sep 15, 03                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 46. Oct 15, 03                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 47. Nov 15, 03                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 48. Dec 15, 03                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 49. Jan 15, 04                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 50. Feb 15, 04                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 51. Mar 15, 04                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 52. Apr 15, 04                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 53. May 15, 04                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 54. Jun 15, 04                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 55. Jul 15, 04                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 56. Aug 15, 04                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 57. Sep 15, 04                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 58. Oct 15, 04                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 59. Nov 15, 04                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 60. Dec 15, 04                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 61. Jan 15, 05                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 62. Feb 15, 05                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 63. Mar 15, 05                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 64. Apr 15, 05                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 65. May 15, 05                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 66. Jun 15, 05                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 67. Jul 15, 05                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 68. Aug 15, 05                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 69. Sep 15, 05                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 70. Oct 15, 05                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 71. Nov 15, 05                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00

<CAPTION>
<S>                      <C>       <C>                           <C>       <C>
 42. Jun 15, 03          0.00        2,145,599.50                0.00      7.2860
 43. Jul 15, 03          0.00        2,145,599.50                0.00      7.2860
 44. Aug 15, 03          0.00        2,145,599.50                0.00      7.2860
 45. Sep 15, 03          0.00        2,145,599.50                0.00      7.2860
 46. Oct 15, 03          0.00        2,145,599.50                0.00      7.2860
 47. Nov 15, 03          0.00        2,145,599.50                0.00      7.2860
 48. Dec 15, 03          0.00        2,145,599.50                0.00      7.2860
 49. Jan 15, 04          0.00        2,145,599.50                0.00      7.2860
 50. Feb 15, 04          0.00        2,145,599.50                0.00      7.2860
 51. Mar 15, 04          0.00        2,145,599.50                0.00      7.2860
 52. Apr 15, 04          0.00        2,145,599.50                0.00      7.2860
 53. May 15, 04          0.00        2,145,599.50                0.00      7.2860
 54. Jun 15, 04          0.00        2,145,599.50                0.00      7.2860
 55. Jul 15, 04          0.00        2,145,599.50                0.00      7.2860
 56. Aug 15, 04          0.00        2,145,599.50                0.00      7.2860
 57. Sep 15, 04          0.00        2,145,599.50                0.00      7.2860
 58. Oct 15, 04          0.00        2,145,599.50                0.00      7.2860
 59. Nov 15, 04          0.00        2,145,599.50                0.00      7.2860
 60. Dec 15, 04          0.00        2,145,599.50                0.00      7.2860
 61. Jan 15, 05          0.00        2,145,599.50                0.00      7.2860
 62. Feb 15, 05          0.00        2,145,599.50                0.00      7.2860
 63. Mar 15, 05          0.00        2,145,599.50                0.00      7.2860
 64. Apr 15, 05          0.00        2,145,599.50                0.00      7.2860
 65. May 15, 05          0.00        2,145,599.50                0.00      7.2860
 66. Jun 15, 05          0.00        2,145,599.50                0.00      7.2860
 67. Jul 15, 05          0.00        2,145,599.50                0.00      7.2860
 68. Aug 15, 05          0.00        2,145,599.50                0.00      7.2860
 69. Sep 15, 05          0.00        2,145,599.50                0.00      7.2860
 70. Oct 15, 05          0.00        2,145,599.50                0.00      7.2860
 71. Nov 15, 05          0.00        2,145,599.50                0.00      7.2860
</TABLE>

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<TABLE>
<S>                      <C>                 <C>                 <C>                 <C>                         <C>
 72. Dec 15, 05                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 73. Jan 15, 06                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 74. Feb 15, 06                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 75. Mar 15, 06                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 76. Apr 15, 06                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 77. May 15, 06                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 78. Jun 15, 06                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 79. Jul 15, 06                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 80. Aug 15, 06                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 81. Sep 15, 06                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 82. Oct 15, 06                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 83. Nov 15, 06                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 84. Dec 15, 06                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 85. Jan 15, 07                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 86. Feb 15, 07                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 87. Mar 15, 07                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 88. Apr 15, 07                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 89. May 15, 07                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 90. Jun 15, 07                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 91. Jul 15, 07                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 92. Aug 15, 07                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 93. Sep 15, 07                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 94. Oct 15, 07                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 95. Nov 15, 07                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 96. Dec 15, 07                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 97. Jan 15, 08                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 98. Feb 15, 08                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
 99. Mar 15, 08                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
100. Apr 15, 08                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
101. May 15, 08                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00

<CAPTION>
<S>                     <C>       <C>                           <C>       <C>
 72. Dec 15, 05         0.00        2,145,599.50                0.00      7.2860
 73. Jan 15, 06         0.00        2,145,599.50                0.00      7.2860
 74. Feb 15, 06         0.00        2,145,599.50                0.00      7.2860
 75. Mar 15, 06         0.00        2,145,599.50                0.00      7.2860
 76. Apr 15, 06         0.00        2,145,599.50                0.00      7.2860
 77. May 15, 06         0.00        2,145,599.50                0.00      7.2860
 78. Jun 15, 06         0.00        2,145,599.50                0.00      7.2860
 79. Jul 15, 06         0.00        2,145,599.50                0.00      7.2860
 80. Aug 15, 06         0.00        2,145,599.50                0.00      7.2860
 81. Sep 15, 06         0.00        2,145,599.50                0.00      7.2860
 82. Oct 15, 06         0.00        2,145,599.50                0.00      7.2860
 83. Nov 15, 06         0.00        2,145,599.50                0.00      7.2860
 84. Dec 15, 06         0.00        2,145,599.50                0.00      7.2860
 85. Jan 15, 07         0.00        2,145,599.50                0.00      7.2860
 86. Feb 15, 07         0.00        2,145,599.50                0.00      7.2860
 87. Mar 15, 07         0.00        2,145,599.50                0.00      7.2860
 88. Apr 15, 07         0.00        2,145,599.50                0.00      7.2860
 89. May 15, 07         0.00        2,145,599.50                0.00      7.2860
 90. Jun 15, 07         0.00        2,145,599.50                0.00      7.2860
 91. Jul 15, 07         0.00        2,145,599.50                0.00      7.2860
 92. Aug 15, 07         0.00        2,145,599.50                0.00      7.2860
 93. Sep 15, 07         0.00        2,145,599.50                0.00      7.2860
 94. Oct 15, 07         0.00        2,145,599.50                0.00      7.2860
 95. Nov 15, 07         0.00        2,145,599.50                0.00      7.2860
 96. Dec 15, 07         0.00        2,145,599.50                0.00      7.2860
 97. Jan 15, 08         0.00        2,145,599.50                0.00      7.2860
 98. Feb 15, 08         0.00        2,145,599.50                0.00      7.2860
 99. Mar 15, 08         0.00        2,145,599.50                0.00      7.2860
100. Apr 15, 08         0.00        2,145,599.50                0.00      7.2860
101. May 15, 08         0.00        2,145,599.50                0.00      7.2860
</TABLE>

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<TABLE>
<S>                      <C>                 <C>                 <C>                 <C>                         <C>
102. Jun 15, 08                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
103. Jul 15, 08                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
104. Aug 15, 08                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
105. Sep 15, 08                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
106. Oct 15, 08                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
107. Nov 15, 08                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
108. Dec 15, 08                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
109. Jan 15, 09                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
110. Feb 15, 09                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
111. Mar 15, 09                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
112. Apr 15, 09                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
113. May 15, 09                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
114. Jun 15, 09                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
115. Jul 15, 09                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
116. Aug 15, 09                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
117. Sep 15, 09                    0.00        2,145,599.50        2,145,599.50      353,379,000.00              0.00
118. Oct 15, 09              271,222.71        2,145,599.50        2,416,822.21      353,107,777.29              0.00
119. Nov 15, 09              635,994.81        2,143,952.72        2,779,947.53      352,471,782.47              0.00
120. Dec 15, 09            1,108,478.55        2,140,091.17        3,248,569.72      351,363,303.92              0.00
121. Jan 15, 10               645659.61          2133360.86          2779020.47         350717644.3                 0
122. Feb 15, 10               650177.13          2129440.63          2779617.76         350067467.2                 0
123. Mar 15, 10               968037.36          2125492.97          3093530.33         349099429.8                 0
124. Apr 15, 10               661499.93          2119615.37           2781115.3         348437929.9                 0
125. May 15, 10               770199.38          2115598.96          2885798.34         347667730.5                 0
126. Jun 15, 10              1284599.41          2110922.57          3395521.98         346383131.1                 0
127. Jul 15, 10               779963.71          2103122.91          2883086.62         345603167.4                 0
128. Aug 15, 10               681674.17          2098387.23           2780061.4         344921493.2                 0
129. Sep 15, 10               686444.09          2094248.33          2780692.43         344235049.1                 0
130. Oct 15, 10               794512.47          2090080.47          2884592.94         343440536.7                 0
131. Nov 15, 10              3624442.25          2085256.46           5709698.7         339816094.4                 0

<CAPTION>
<S>                     <C>       <C>                           <C>       <C>
102. Jun 15, 08         0.00        2,145,599.50                0.00      7.2860
103. Jul 15, 08         0.00        2,145,599.50                0.00      7.2860
104. Aug 15, 08         0.00        2,145,599.50                0.00      7.2860
105. Sep 15, 08         0.00        2,145,599.50                0.00      7.2860
106. Oct 15, 08         0.00        2,145,599.50                0.00      7.2860
107. Nov 15, 08         0.00        2,145,599.50                0.00      7.2860
108. Dec 15, 08         0.00        2,145,599.50                0.00      7.2860
109. Jan 15, 09         0.00        2,145,599.50                0.00      7.2860
110. Feb 15, 09         0.00        2,145,599.50                0.00      7.2860
111. Mar 15, 09         0.00        2,145,599.50                0.00      7.2860
112. Apr 15, 09         0.00        2,145,599.50                0.00      7.2860
113. May 15, 09         0.00        2,145,599.50                0.00      7.2860
114. Jun 15, 09         0.00        2,145,599.50                0.00      7.2860
115. Jul 15, 09         0.00        2,145,599.50                0.00      7.2860
116. Aug 15, 09         0.00        2,145,599.50                0.00      7.2860
117. Sep 15, 09         0.00        2,145,599.50                0.00      7.2860
118. Oct 15, 09         0.00        2,145,599.50                0.00      7.2860
119. Nov 15, 09         0.00        2,143,952.72                0.00      7.2860
120. Dec 15, 09         0.00        2,140,091.17                0.00      7.2860
121. Jan 15, 10            0          2133360.86                   0       7.286
122. Feb 15, 10            0          2129440.63                   0       7.286
123. Mar 15, 10            0          2125492.97                   0       7.286
124. Apr 15, 10            0          2119615.37                   0       7.286
125. May 15, 10            0          2115598.96                   0       7.286
126. Jun 15, 10            0          2110922.57                   0       7.286
127. Jul 15, 10            0          2103122.91                   0       7.286
128. Aug 15, 10            0          2098387.23                   0       7.286
129. Sep 15, 10            0          2094248.33                   0       7.286
130. Oct 15, 10            0          2090080.47                   0       7.286
131. Nov 15, 10            0          2085256.46                   0       7.286
</TABLE>

<PAGE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials.

Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.

<TABLE>
<S>                      <C>                 <C>                 <C>                 <C>                         <C>
132. Dec 15, 10              1178749.62          2063250.05          3241999.67         338637344.8                 0
133. Jan 15, 11                  703959          2056093.08          2760052.08         337933385.8                 0
134. Feb 15, 11               708887.69          2051818.87          2760706.56         337224498.1                 0
135. Mar 15, 11              1019381.13          2047514.74          3066895.88           336205117                 0
136. Apr 15, 11               720988.38           2041325.4          2762313.78         335484128.6                 0
137. May 15, 11               827488.67           2036947.8          2864436.47         334656639.9                 0
138. Jun 15, 11              1405557.71          2031923.57          3437481.27         333251082.2                 0
139. Jul 15, 11             31350915.52          2023389.49            33374305         301900166.7                 0
140. Aug 15, 11             23920446.13          1833037.18         25753483.31         277979720.6                 0
141. Sep 15, 11             130256610.8           1687800.2           131944411         147723109.7                 0
142. Oct 15, 11             147059028.2           896925.48         147955953.6           664081.58                 0
143. Nov 15, 11               664081.58             4032.08           668113.66                   0                 0

<CAPTION>
<S>                     <C>       <C>                           <C>       <C>
132. Dec 15, 10            0          2063250.05                   0       7.286
133. Jan 15, 11            0          2056093.08                   0       7.286
134. Feb 15, 11            0          2051818.87                   0       7.286
135. Mar 15, 11            0          2047514.74                   0       7.286
136. Apr 15, 11            0           2041325.4                   0       7.286
137. May 15, 11            0           2036947.8                   0       7.286
138. Jun 15, 11            0          2031923.57                   0       7.286
139. Jul 15, 11            0          2023389.49                   0       7.286
140. Aug 15, 11            0          1833037.18                   0       7.286
141. Sep 15, 11            0           1687800.2                   0       7.286
142. Oct 15, 11            0           896925.48                   0       7.286
143. Nov 15, 11            0             4032.08                   0       7.286
</TABLE>


<PAGE>


FUNB99C4_RED, CLASS BBP--PRICE/YIELD

- ---------------------------------------------
CUSIP
Coupon                           6.5
Delay                             14
Stated Maturity                  N/A
Type                           JUN FIX
- ---------------------------------------------

- ------------------------------------------------------
Face                            $33,219,000.00
Original Balance                $33,219,000.00
Current Balance                 $33,219,000.00
Factor                                1
- ------------------------------------------------------

- ----------------------------------------------------------
Settle at Pricing
Accrual begins                        12/1/1999
Factor Date                              N/A
- ----------------------------------------------------------

YIELD CURVE:  Spread off interpolated node
3MO=5.68, 6MO=5.68, 1YR=5.68, 2YR=5.942, 5YR=6.02, 10YR=6.107, 30YR=6.208

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
                              OCPR;EXT0MO,
                             100% 0%RULES;        OCPR;EXT0MO,100%        OCPR;EXT0MO,100% 0%          OCPR;EXT0MO,100% 0%
                               OCDR, 40%        0% RULES; .5CDR,40%         RULES; 1CDR,40%              RULES; 1.5CDR,40%
          PRICE              ADV100% LAG12         ADV100% LAG12             ADV100% LAG12                ADV100% LAG12
                                Yield
- ------------------------------------------------------------------------------------------------------------------------------------
          <S>                  <C>                   <C>                        <C>                          <C>
          70-29                11.3607               11.2204                    11.1376                      11.0712
          70-31                11.3477               11.2077                    11.1251                      11.0589
          71-01                11.3347               11.1950                    11.1127                      11.0466
          71-03                11.3216               11.1824                    11.1002                      11.0343
          71-05                11.3086               11.1697                    11.0878                      11.0221
          71-07                11.2957               11.1571                    11.0754                      11.0098
          71-09                11.2827               11.1445                    11.0630                      10.9976
          71-11                11.2697               11.1319                    11.0506                      10.9854
          71-13                11.2568               11.1194                    11.0383                      10.9732
          71-15                11.2439               11.1068                    11.0259                      10.9610
          71-17                11.2310               11.0942                    11.0136                      10.9489
          71-19                11.2181               11.0817                    11.0013                      10.9367
          71-21                11.2052               11.0692                    10.9890                      10.9246
          71-23                11.1923               11.0567                    10.9767                      10.9124
          71-25                11.1795               11.0442                    10.9644                      10.9003
          71-27                11.1666               11.0317                    10.9522                      10.8882
          71-29                11.1538               11.0193                    10.9399                      10.8762
- ------------------------------------------------------------------------------------------------------------------------------------

<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
    <S>                     <C>               <C>                        <C>                          <C>
    Spread @ Center Price        515                   501                        492                          486
                      WAL      10.80070              11.29393                   11.60405                     11.89710
                 Mod Durn       6.741                 6.936                      7.057                        7.152
            Mod Convexity       0.624                 0.665                      0.691                        0.715
         Principal Window   Dec09 to Jun11        Dec09 to Sep11             Jun11 to Sep11               Jun11 to Jun14
            Maturity #mos        138                   141                        141                          174
         Accrued Interest     95,966.00             95,966.00                  95,966.00                    95,966.00
        Total Collat Loss    0.00 (0.00%)     14,145,867.94 (1.60%)      27,749,254.12 (3.13%)        40,829,767.16 (4.61%)

                   Prepay      At 0 CPR              At 0 CPR                   At 0 CPR                     At 0 CPR
               No prepays
    Lockout and penalties  Include penalty       Include penalty            Include penalty              Include penalty

    Extension, if balloon        None                  None                       None                         None
          Increase Coupon
          Pay Exten Princ

                  Default      At 0 CDR             At .5 CDR                   At 1 CDR                    At 1.5 CDR
            Loss Severity        0.4                   0.4                        0.4                          0.4
        Servicer Advances   100% of P & I         100% of P & I              100% of P & I                100% of P & I
             Recovery Lag       12 mos                12 mos                     12 mos                       12 mos

      Optional Redemption
- ------------------------------------------------------------------------------------------------------------------------------------

<CAPTION>
- --------------------------------------------------------------------------------------------------------
                                                        OCPR;EXT0MO,100%
                            OCPR;EXT0MO,100% 0%            0% RULES;               OCPR;EXT0MO,100%
                             RULES; 2CDR,40%               2.5CDR,40%             0% RULES; 3CDR,40%
          PRICE                ADV100% LAG12             ADV100% LAG12              ADV100% LAG12

- --------------------------------------------------------------------------------------------------------
          <S>                     <C>                         <C>                       <C>
          70-29                   10.7922                     8.6194                    4.8641
          70-31                   10.7806                     8.6080                    4.8527
          71-01                   10.7690                     8.5965                    4.8413
          71-03                   10.7574                     8.5850                    4.8299
          71-05                   10.7458                     8.5736                    4.8186
          71-07                   10.7343                     8.5622                    4.8072
          71-09                   10.7227                     8.5508                    4.7959
          71-11                   10.7112                     8.5394                    4.7846
          71-13                   10.6997                     8.5280                    4.7733
          71-15                   10.6881                     8.5166                    4.7620
          71-17                   10.6767                     8.5053                    4.7508
          71-19                   10.6652                     8.4939                    4.7395
          71-21                   10.6537                     8.4826                    4.7283
          71-23                   10.6423                     8.4713                    4.7171
          71-25                   10.6308                     8.4600                    4.7059
          71-27                   10.6194                     8.4487                    4.6947
          71-29                   10.6080                     8.4374                    4.6835
- --------------------------------------------------------------------------------------------------------

<CAPTION>
- --------------------------------------------------------------------------------------------------------
    <S>                    <C>                         <C>                       <C>
    Spread @ Center Price           458                         241                      -134
                      WAL         13.40146                   12.98617                  11.30848
                 Mod Durn          7.572                       7.664                    7.727
            Mod Convexity          0.828                       0.878                    0.944
         Principal Window      Sep11 to Jun16             Sep11 to Nov19            Jun14 to Nov19
            Maturity #mos           198                         239                      239
         Accrued Interest        95,966.00                   95,966.00                95,966.00
        Total Collat Loss  53,406,342.81 (6.03%)       65,497,266.69 (7.39%)    77,120,196.33 (8.71%)

                   Prepay         At 0 CPR                   At 0 CPR                  At 0 CPR
               No prepays
    Lockout and penalties     Include penalty             Include penalty          Include penalty

    Extension, if balloon           None                       None                      None
          Increase Coupon
          Pay Exten Princ

                  Default         At 2 CDR                  At 2.5 CDR                 At 3 CDR
            Loss Severity           0.4                         0.4                      0.4
        Servicer Advances      100% of P & I               100% of P & I            100% of P & I
             Recovery Lag          12 mos                     12 mos                    12 mos

      Optional Redemption
- --------------------------------------------------------------------------------------------------------
</TABLE>

- --------------------------------------------------------------------------------
Investors should read the Underwriters' Statement which accompanies these
Computational Materials.
Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.
- --------------------------------------------------------------------------------


                 Generated by Intex Trader 12/13/1999 12:28 PM
 Information provided herein is believed by INTEX to be accurate; however INTEX
                           cannot guarantee accuracy.
<PAGE>

FUNB99C4_RED, CLASS BBP--PRICE/YIELD

- ---------------------------------------------
CUSIP
Coupon                           6.5
Delay                             14
Stated Maturity                  N/A
Type                           JUN FIX
- ---------------------------------------------

- ------------------------------------------------------
Face                            $33,219,000.00
Original Balance                $33,219,000.00
Current Balance                 $33,219,000.00
Factor                                1
- ------------------------------------------------------

- ----------------------------------------------------------
Settle at Pricing
Accrual begins                        12/1/1999
Factor Date                              N/A
- ----------------------------------------------------------

YIELD CURVE:  Spread off interpolated node
3MO=5.68, 6MO=5.68, 1YR=5.68, 2YR=5.942, 5YR=6.02, 10YR=6.107, 30YR=6.208

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
                              OCPR;EXT0MO,
                             100% 0%RULES;        OCPR;EXT0MO,100%       OCPR;EXT0MO,100% 0%          OCPR;EXT0MO,100% 0%
                               OCDR, 40%        0% RULES; .5CDR,40%        RULES; 1CDR,40%              RULES; 1.5CDR,40%
          PRICE              ADV100% LAG12         ADV100% LAG12           ADV100% LAG12                 ADV100% LAG12
                                Yield
- ------------------------------------------------------------------------------------------------------------------------------------
          <S>                  <C>                   <C>                        <C>                          <C>
          70-29                10.7613               10.6792                    10.5935                      10.5542
          70-31                10.7498               10.6679                    10.5824                      10.5432
          71-01                10.7383               10.6566                    10.5713                      10.5322
          71-03                10.7268               10.6453                    10.5603                      10.5212
          71-05                10.7154               10.6341                    10.5492                      10.5103
          71-07                10.7039               10.6228                    10.5382                      10.4994
          71-09                10.6925               10.6116                    10.5272                      10.4884
          71-11                10.6810               10.6004                    10.5162                      10.4775
          71-13                10.6696               10.5892                    10.5052                      10.4666
          71-15                10.6582               10.5780                    10.4942                      10.4558
          71-17                10.6468               10.5668                    10.4832                      10.4449
          71-19                10.6355               10.5556                    10.4723                      10.4341
          71-21                10.6241               10.5445                    10.4614                      10.4232
          71-23                10.6128               10.5333                    10.4504                      10.4124
          71-25                10.6015               10.5222                    10.4395                      10.4016
          71-27                10.5901               10.5111                    10.4286                      10.3908
          71-29                10.5788               10.5000                    10.4178                      10.3800
- ------------------------------------------------------------------------------------------------------------------------------------

<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                       <C>                 <C>                        <C>                          <C>
  Spread @ Center Price          455                   446                        438                          434
                    WAL        13.39320              13.86840                   14.38355                     14.63273
               Mod Durn         7.644                 7.784                      7.938                        8.011
          Mod Convexity         0.837                 0.875                      0.917                        0.938
       Principal Window     Dec12 to Jun14        Dec12 to Jun14             Dec12 to Sep14               Jun14 to Sep14
          Maturity #mos          174                   174                        177                          177
       Accrued Interest       95,966.00             95,966.00                  95,966.00                    95,966.00
      Total Collat Loss      0.00 (0.00%)     14,145,867.94 (1.60%)      27,749,254.12 (3.13%)        40,829,767.16 (4.61%)

                 Prepay        At 0 CPR              At 0 CPR                   At 0 CPR                     At 0 CPR
             No prepays
  Lockout and penalties    Include penalty       Include penalty            Include penalty              Include penalty

  Extension, if balloon   Extend 100% 36 mos    Extend 100% 36 mos         Extend 100% 36 mos           Extend 100% 36 mos
        Increase Coupon    0% for extension      0% for extension           0% for extension             0% for extension
        Pay Exten Princ   By pre-exten rules    By pre-exten rules         By pre-exten rules           By pre-exten rules

                Default        At 0 CDR             At .5 CDR                   At 1 CDR                    At 1.5 CDR
          Loss Severity          0.4                   0.4                        0.4                          0.4
      Servicer Advances     100% of P & I         100% of P & I              100% of P & I                100% of P & I
           Recovery Lag         12 mos                12 mos                     12 mos                       12 mos

    Optional Redemption
- ------------------------------------------------------------------------------------------------------------------------------------

<CAPTION>
- --------------------------------------------------------------------------------------------------------
                                                        OCPR;EXT0MO,100%
                            OCPR;EXT0MO,100% 0%             0% RULES;            OCPR;EXT0MO,100%
                             RULES; 2CDR,40%               2.5CDR,40%           0% RULES; 3CDR,40%
          PRICE               ADV100% LAG12               ADV100% LAG12           ADV100% LAG12

- --------------------------------------------------------------------------------------------------------
          <S>                   <C>                         <C>                       <C>
          70-29                 10.4689                     8.5175                    4.8902
          70-31                 10.4582                     8.5066                    4.8790
          71-01                 10.4474                     8.4956                    4.8678
          71-03                 10.4366                     8.4847                    4.8566
          71-05                 10.4259                     8.4739                    4.8454
          71-07                 10.4152                     8.4630                    4.8343
          71-09                 10.4045                     8.4521                    4.8231
          71-11                 10.3938                     8.4413                    4.8120
          71-13                 10.3831                     8.4305                    4.8009
          71-15                 10.3724                     8.4196                    4.7898
          71-17                 10.3618                     8.4088                    4.7787
          71-19                 10.3511                     8.3981                    4.7677
          71-21                 10.3405                     8.3873                    4.7566
          71-23                 10.3299                     8.3765                    4.7456
          71-25                 10.3193                     8.3658                    4.7346
          71-27                 10.3087                     8.3551                    4.7236
          71-29                 10.2981                     8.3443                    4.7126
- ------------------------------------------------------------------------------------------------------

<CAPTION>
- ------------------------------------------------------------------------------------------------------
<S>                      <C>                         <C>                       <C>
  Spread @ Center Price           425                         230                      -131
                    WAL         15.27262                   13.95111                  11.50297
               Mod Durn          8.166                       8.056                    7.855
          Mod Convexity          0.986                       0.986                    0.986
       Principal Window      Jun14 to Jan18             Sep14 to Dec19            Sep14 to Dec19
          Maturity #mos           217                         240                      240
       Accrued Interest        95,966.00                   95,966.00                95,966.00
      Total Collat Loss  53,406,342.81 (6.03%)       65,497,266.69 (7.39%)    77,120,196.33 (8.71%)

                 Prepay         At 0 CPR                   At 0 CPR                  At 0 CPR
             No prepays
  Lockout and penalties     Include penalty             Include penalty          Include penalty

  Extension, if balloon    Extend 100% 36 mos         Extend 100% 36 mos        Extend 100% 36 mos
        Increase Coupon     0% for extension           0% for extension          0% for extension
        Pay Exten Princ    By pre-exten rules         By pre-exten rules     By pre-exten rules

                Default         At 2 CDR                  At 2.5 CDR                 At 3 CDR
          Loss Severity           0.4                         0.4                      0.4
      Servicer Advances      100% of P & I               100% of P & I            100% of P & I
           Recovery Lag          12 mos                     12 mos                    12 mos


- ------------------------------------------------------------------------------------------------------
</TABLE>

- --------------------------------------------------------------------------------
Investors should read the Underwriters' Statement which accompanies these
Computational Materials.
Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.
- --------------------------------------------------------------------------------


                 Generated by Intex Trader 12/13/1999 12:28 PM
 Information provided herein is believed by INTEX to be accurate; however INTEX
                           cannot guarantee accuracy.
<PAGE>

FUNB99C4_RED, CLASS BB--PRICE/YIELD

- ---------------------------------------------
CUSIP
Coupon                           6.5
Delay                             14
Stated Maturity                  N/A
Type                           JUN FIX
- ---------------------------------------------

- ------------------------------------------------------
Face                            $11,073,000.00
Original Balance                $11,073,000.00
Current Balance                 $11,073,000.00
Factor                                1
- ------------------------------------------------------

- ----------------------------------------------------------
Settle at Pricing
Accrual begins                        12/1/1999
Factor Date                              N/A
- ----------------------------------------------------------

YIELD CURVE:  Spread off interpolated node
3MO=5.68, 6MO=5.68, 1YR=5.68, 2YR=5.942, 5YR=6.02, 10YR=6.107, 30YR=6.208

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
                              OCPR;EXT0MO,
                             100% 0% RULES;      OCPR;EXT0MO,100%         OCPR;EXT0MO,100% 0%         OCPR;EXT0MO,100% 0%
                               OCDR, 40%        0% RULES; .5CDR,40%         RULES; 1CDR,40%             RULES; 1.5CDR,40%
          PRICE              ADV100% LAG12        ADV100% LAG12              ADV100% LAG12               ADV100% LAG12
                                Yield
- ------------------------------------------------------------------------------------------------------------------------------------
          <S>                  <C>                   <C>                        <C>                          <C>
          68-04                11.7196               11.6697                    11.5569                      10.8772
          68-06                11.7064               11.6566                    11.5440                      10.8659
          68-08                11.6932               11.6436                    11.5312                      10.8547
          68-10                11.6800               11.6305                    11.5184                      10.8435
          68-12                11.6668               11.6175                    11.5057                      10.8323
          68-14                11.6537               11.6044                    11.4929                      10.8211
          68-16                11.6406               11.5914                    11.4802                      10.8100
          68-18                11.6275               11.5785                    11.4674                      10.7988
          68-20                11.6144               11.5655                    11.4547                      10.7877
          68-22                11.6013               11.5525                    11.4420                      10.7766
          68-24                11.5883               11.5396                    11.4293                      10.7655
          68-26                11.5752               11.5267                    11.4167                      10.7544
          68-28                11.5622               11.5138                    11.4040                      10.7433
          68-30                11.5492               11.5009                    11.3914                      10.7323
          69-00                11.5362               11.4880                    11.3788                      10.7212
          69-02                11.5232               11.4751                    11.3662                      10.7102
          69-04                11.5103               11.4623                    11.3536                      10.6992
- ------------------------------------------------------------------------------------------------------------------------------------

<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
    <S>                     <C>               <C>                        <C>                          <C>
    Spread @ Center Price        550                   545                        534                          465
                      WAL      11.56324              11.74444                   12.20771                     15.85635
                 Mod Durn       6.933                 6.996                      7.139                        8.153
            Mod Convexity       0.673                 0.687                      0.722                        1.002
         Principal Window   Jun11 to Sep11        Sep11 to Sep11             Sep11 to Dec13               Jun14 to Jun16
            Maturity #mos        141                   141                        168                          198
         Accrued Interest     31,988.67             31,988.67                  31,988.67                    31,988.67
        Total Collat Loss    0.00 (0.00%)     14,145,867.94 (1.60%)      27,749,254.12 (3.13%)        40,829,767.16 (4.61%)

                   Prepay      At 0 CPR              At 0 CPR                   At 0 CPR                     At 0 CPR
               No prepays
    Lockout and penalties  Include penalty       Include penalty            Include penalty              Include penalty

    Extension, if balloon        None                  None                       None                         None
          Increase Coupon
          Pay Exten Princ

                  Default      At 0 CDR             At .5 CDR                   At 1 CDR                    At 1.5 CDR
            Loss Severity        0.4                   0.4                        0.4                          0.4
        Servicer Advances   100% of P & I         100% of P & I              100% of P & I                100% of P & I
             Recovery Lag       12 mos                12 mos                     12 mos                       12 mos

      Optional Redemption
- ------------------------------------------------------------------------------------------------------------------------------------

<CAPTION>
- --------------------------------------------------------------------------------------------------------
                                                          OCPR;EXT0MO,100%
                             OCPR;EXT0MO,100% 0%             0% RULES;             OCPR;EXT0MO,100%
                               RULES; 2CDR,40%               2.5CDR,40%           0% RULES; 3CDR,40%
          PRICE                ADV100% LAG12               ADV100% LAG12            ADV100% LAG12

- --------------------------------------------------------------------------------------------------------
          <S>                      <C>                         <C>                     <C>
          68-04                    3.4504                     -8.3618                  -14.4846
          68-06                    3.4376                     -8.3827                  -14.5075
          68-08                    3.4248                     -8.4035                  -14.5305
          68-10                    3.4121                     -8.4242                  -14.5534
          68-12                    3.3994                     -8.4450                  -14.5762
          68-14                    3.3867                     -8.4657                  -14.5991
          68-16                    3.3740                     -8.4864                  -14.6219
          68-18                    3.3613                     -8.5070                  -14.6447
          68-20                    3.3487                     -8.5277                  -14.6674
          68-22                    3.3361                     -8.5483                  -14.6902
          68-24                    3.3235                     -8.5689                  -14.7129
          68-26                    3.3109                     -8.5894                  -14.7355
          68-28                    3.2983                     -8.6100                  -14.7582
          68-30                    3.2858                     -8.6305                  -14.7808
          69-00                    3.2733                     -8.6510                  -14.8034
          69-02                    3.2607                     -8.6714                  -14.8260
          69-04                    3.2483                     -8.6918                  -14.8485
- --------------------------------------------------------------------------------------------------------

<CAPTION>
- --------------------------------------------------------------------------------------------------------
    <S>                    <C>                        <C>                       <C>
    Spread @ Center Price           -276                      -1,459                    -2,071
                      WAL         11.03724                    7.47480                  6.27009
                 Mod Durn          7.180                       4.397                    3.987
            Mod Convexity          0.862                       0.268                    0.218
         Principal Window      Jun16 to Nov19             Jan00 to May08            Jan00 to Dec06
            Maturity #mos           239                         101                       84
         Accrued Interest        31,988.67                   31,988.67                31,988.67
        Total Collat Loss  53,406,342.81 (6.03%)       65,497,266.69 (7.39%)    77,120,196.33 (8.71%)

                   Prepay         At 0 CPR                   At 0 CPR                  At 0 CPR
               No prepays
    Lockout and penalties     Include penalty             Include penalty          Include penalty

    Extension, if balloon           None                       None                      None
          Increase Coupon
          Pay Exten Princ

                  Default         At 2 CDR                  At 2.5 CDR                 At 3 CDR
            Loss Severity           0.4                         0.4                      0.4
        Servicer Advances      100% of P & I               100% of P & I            100% of P & I
             Recovery Lag          12 mos                     12 mos                    12 mos

      Optional Redemption
- --------------------------------------------------------------------------------------------------------
</TABLE>

- --------------------------------------------------------------------------------
Investors should read the Underwriters' Statement which accompanies these
Computational Materials.
Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.
- --------------------------------------------------------------------------------


                 Generated by Intex Trader 12/13/1999 12:28 PM
 Information provided herein is believed by INTEX to be accurate; however INTEX
                           cannot guarantee accuracy.
<PAGE>

FUNB99C4_RED, CLASS BB--PRICE/YIELD

- ---------------------------------------------
CUSIP
Coupon                           6.5
Delay                             14
Stated Maturity                  N/A
Type                           JUN FIX
- ---------------------------------------------

- ------------------------------------------------------
Face                            $11,073,000.00
Original Balance                $11,073,000.00
Current Balance                 $11,073,000.00
Factor                                1
- ------------------------------------------------------

- ----------------------------------------------------------
Settle at Pricing
Accrual begins                        12/1/1999
Factor Date                              N/A
- ----------------------------------------------------------

YIELD CURVE:  Spread off interpolated node
3MO=5.68, 6MO=5.68, 1YR=5.68, 2YR=5.942, 5YR=6.02, 10YR=6.107, 30YR=6.208

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
                              OCPR;EXT0MO,
                             100% 0% RULES;      OCPR;EXT0MO,100%        OCPR;EXT0MO,100% 0%          OCPR;EXT0MO,100% 0%
                               OCDR, 40%        0% RULES; .5CDR,40%        RULES; 1CDR,40%              RULES; 1.5CDR,40%
          PRICE              ADV100% LAG12        ADV100% LAG12             ADV100% LAG12                ADV100% LAG12
                                Yield
- ------------------------------------------------------------------------------------------------------------------------------------
          <S>                  <C>                   <C>                        <C>                          <C>
          68-04                11.0809               11.0542                    11.0394                      10.8298
          68-06                11.0692               11.0425                    11.0278                      10.8187
          68-08                11.0576               11.0309                    11.0162                      10.8076
          68-10                11.0459               11.0193                    11.0046                      10.7965
          68-12                11.0342               11.0077                    10.9931                      10.7854
          68-14                11.0226               10.9961                    10.9815                      10.7743
          68-16                11.0110               10.9845                    10.9700                      10.7633
          68-18                10.9993               10.9730                    10.9585                      10.7522
          68-20                10.9878               10.9615                    10.9470                      10.7412
          68-22                10.9762               10.9499                    10.9355                      10.7302
          68-24                10.9646               10.9384                    10.9240                      10.7192
          68-26                10.9531               10.9269                    10.9126                      10.7082
          68-28                10.9415               10.9155                    10.9012                      10.6973
          68-30                10.9300               10.9040                    10.8897                      10.6863
          69-00                10.9185               10.8926                    10.8783                      10.6754
          69-02                10.9070               10.8812                    10.8669                      10.6645
          69-04                10.8956               10.8697                    10.8556                      10.6536
- ------------------------------------------------------------------------------------------------------------------------------------

<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
   <S>                    <C>                 <C>                        <C>                          <C>
   Spread @ Center Price         486                   483                        482                          460
                     WAL       14.49444              14.65541                   14.74444                     16.19968
                Mod Durn        7.827                 7.869                      7.893                        8.233
           Mod Convexity        0.902                 0.914                      0.921                        1.028
        Principal Window    Jun14 to Jun14        Jun14 to Sep14             Sep14 to Sep14               Sep14 to Aug17
           Maturity #mos         174                   177                        177                          212
        Accrued Interest      31,988.67             31,988.67                  31,988.67                    31,988.67
       Total Collat Loss     0.00 (0.00%)     14,145,867.94 (1.60%)      27,749,254.12 (3.13%)        40,829,767.16 (4.61%)

                  Prepay       At 0 CPR              At 0 CPR                   At 0 CPR                     At 0 CPR
              No prepays
   Lockout and penalties   Include penalty       Include penalty            Include penalty              Include penalty

   Extension, if balloon  Extend 100% 36 mos    Extend 100% 36 mos         Extend 100% 36 mos           Extend 100% 36 mos
         Increase Coupon   0% for extension      0% for extension           0% for extension             0% for extension
         Pay Exten Princ  By pre-exten rules    By pre-exten rules         By pre-exten rules           By pre-exten rules

                 Default       At 0 CDR             At .5 CDR                   At 1 CDR                    At 1.5 CDR
           Loss Severity         0.4                   0.4                        0.4                          0.4
       Servicer Advances    100% of P & I         100% of P & I              100% of P & I                100% of P & I
            Recovery Lag        12 mos                12 mos                     12 mos                       12 mos

     Optional Redemption
- ------------------------------------------------------------------------------------------------------------------------------------

<CAPTION>
- --------------------------------------------------------------------------------------------------------
                                                          OCPR;EXT0MO,100%
                             OCPR;EXT0MO,100% 0%             0% RULES;            OCPR;EXT0MO,100%
                              RULES; 2CDR,40%               2.5CDR,40%           0% RULES; 3CDR,40%
          PRICE                 ADV100% LAG12             ADV100% LAG12            ADV100% LAG12

- --------------------------------------------------------------------------------------------------------
          <S>                     <C>                        <C>                      <C>
          68-04                   3.5247                     -8.3618                  -14.4846
          68-06                   3.5123                     -8.3827                  -14.5075
          68-08                   3.4999                     -8.4035                  -14.5305
          68-10                   3.4875                     -8.4242                  -14.5534
          68-12                   3.4752                     -8.4450                  -14.5762
          68-14                   3.4628                     -8.4657                  -14.5991
          68-16                   3.4505                     -8.4864                  -14.6219
          68-18                   3.4382                     -8.5070                  -14.6447
          68-20                   3.4259                     -8.5277                  -14.6674
          68-22                   3.4136                     -8.5483                  -14.6902
          68-24                   3.4014                     -8.5689                  -14.7129
          68-26                   3.3892                     -8.5894                  -14.7355
          68-28                   3.3769                     -8.6100                  -14.7582
          68-30                   3.3648                     -8.6305                  -14.7808
          69-00                   3.3526                     -8.6510                  -14.8034
          69-02                   3.3404                     -8.6714                  -14.8260
          69-04                   3.3283                     -8.6918                  -14.8485
- -------------------------------------------------------------------------------------------------------

<CAPTION>
- -------------------------------------------------------------------------------------------------------
   <S>                    <C>                        <C>                       <C>
   Spread @ Center Price           -269                      -1,459                    -2,071
                     WAL         11.26467                    7.47480                  6.27009
                Mod Durn          7.388                       4.397                    3.987
           Mod Convexity          0.934                       0.268                    0.218
        Principal Window      Jan18 to Dec19             Jan00 to May08            Jan00 to Dec06
           Maturity #mos           240                         101                       84
        Accrued Interest        31,988.67                   31,988.67                31,988.67
       Total Collat Loss  53,406,342.81 (6.03%)       65,497,266.69 (7.39%)    77,120,196.33 (8.71%)

                  Prepay         At 0 CPR                   At 0 CPR                  At 0 CPR
              No prepays
   Lockout and penalties     Include penalty             Include penalty          Include penalty

   Extension, if balloon    Extend 100% 36 mos         Extend 100% 36 mos        Extend 100% 36 mos
         Increase Coupon     0% for extension           0% for extension          0% for extension
         Pay Exten Princ    By pre-exten rules         By pre-exten rules     By pre-exten rules

                 Default         At 2 CDR                  At 2.5 CDR                 At 3 CDR
           Loss Severity           0.4                         0.4                      0.4
       Servicer Advances      100% of P & I               100% of P & I            100% of P & I
            Recovery Lag          12 mos                     12 mos                    12 mos

     Optional Redemption
- -------------------------------------------------------------------------------------------------------
</TABLE>

- --------------------------------------------------------------------------------
Investors should read the Underwriters' Statement which accompanies these
Computational Materials.
Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.
- --------------------------------------------------------------------------------


                 Generated by Intex Trader 12/13/1999 12:28 PM
 Information provided herein is believed by INTEX to be accurate; however INTEX
                           cannot guarantee accuracy.
<PAGE>

FUNB99C4_RED, Class AAA_2--Price/Yield

- -------------------------------------------------
CUSIP
Coupon                             7.286
Delay                                14
Stated Maturity                     N/A
Type                              SEN FIX
- -------------------------------------------------

- -------------------------------------------------
Face                       $447,304,000.00
Original Balance           $447,304,000.00
Current Balance            $447,304,000.00
Factor                            1
- -------------------------------------------------

- --------------------------------------------------------
Settle at Pricing
Accrual begins                       12/1/1999
Factor Date                             N/A
- --------------------------------------------------------

YIELD CURVE:  Spread off interpolated node
3MO=5.68, 6MO=5.68, 1YR=5.68, 2YR=5.942, 5YR=6.02, 10YR=6.107, 30YR=6.208

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
                              OCPR;EXT0MO,
                             100% 0%RULES;        15CPR;EXT0MO,100%        25CPR;EXT0MO,100% 0%       5OCPR;EXT0MO,100% 0%
                               OCDR, 35%         0% RULES; 0CDR,35%          RULES; 35CDR,40%           RULES; 0CDR,35%
          PRICE              ADV100% LAG12          ADV100% LAG12             ADV100% LAG12              ADV100% LAG12
                                Yield
- ------------------------------------------------------------------------------------------------------------------------------------
          <S>                  <C>                   <C>                        <C>                          <C>
           98-16                   7.5792               7.5831                   7.5828                     7.5817
           98-24                   7.5416               7.5452                   7.5449                     7.5436
           99-00                   7.5042               7.5075                   7.5071                     7.5057
           99-08                   7.4668               7.4700                   7.4694                     7.4680
           99-16                   7.4296               7.4325                   7.4318                     7.4303
           99-24                   7.3925               7.3952                   7.3944                     7.3928
          100-00                   7.3556               7.3580                   7.3571                     7.3554
          100-08                   7.3187               7.3209                   7.3199                     7.3181
          100-16                   7.2820               7.2839                   7.2829                     7.2810
          100-24                   7.2454               7.2470                   7.2459                     7.2439
          101-00                   7.2089               7.2103                   7.2091                     7.2070
          101-08                   7.1725               7.1737                   7.1724                     7.1702
          101-16                   7.1363               7.1372                   7.1358                     7.1335
          101-24                   7.1001               7.1008                   7.0993                     7.0969
          102-00                   7.0641               7.0645                   7.0630                     7.0605
          102-08                   7.0282               7.0284                   7.0267                     7.0241
          102-16                   6.9924               6.9923                   6.9906                     6.9879
- ----------------------------------------------------------------------------------------------------------------------------------

<CAPTION>
- ----------------------------------------------------------------------------------------------------------------------------------
      <S>                     <C>                   <C>                     <C>                         <C>
      Spread @ Center Price         118                   118                     118                         118
                        WAL       9.73353               9.64383                 9.61166                     9.57706
                   Mod Durn        6.762                 6.717                   6.701                       6.683
              Mod Convexity        0.594                 0.586                   0.583                       0.580
           Principal Window    Sep08 to Nov09       Sep07 to Nov09           Sep07 to Nov09             Sep07 to Nov09
              Maturity #mos         119                   119                     119                         119
           Accrued Interest     1,448,469.75         1,448,469.75             1,448,469.75               1,448,469.75
          Total Collat Loss     0.00 (0.00%)         0.00 (0.00%)             0.00 (0.00%)               0.00 (0.00%)

                     Prepay       At 0 CPR             At 15 CPR               At 25 CPR                   At 50 CPR
                 No prepays
      Lockout and penalties   Include penalty       Include penalty         Include penalty             Include penalty

      Extension, if balloon         None                 None                     None                       None
            Increase Coupon
            Pay Exten Princ

                    Default       At 0 CDR             At 0 CDR                 At 0 CDR                   At 0 CDR
              Loss Severity         0.35                 0.35                     0.35                       0.35
          Servicer Advances    100% of P & I         100% of P & I           100% of P & I               100% of P & I
               Recovery Lag        12 mos               12 mos                   12 mos                     12 mos

        Optional Redemption
- ----------------------------------------------------------------------------------------------------------------------------------
</TABLE>

- -----------------------------------------------------
                               100CPR; EXT0MO
                            100% 0% RULES; 0CDR;
                                35% ADV100%
          PRICE                    LAG12

- -----------------------------------------------------
           98-16                   7.5837
           98-24                   7.5452
           99-00                   7.5068
           99-08                   7.4685
           99-16                   7.4304
           99-24                   7.3924
          100-00                   7.3545
          100-08                   7.3168
          100-16                   7.2792
          100-24                   7.2416
          101-00                   7.2043
          101-08                   7.1670
          101-16                   7.1298
          101-24                   7.0928
          102-00                   7.0559
          102-08                   7.0191
          102-16                   6.9824
- -----------------------------------------------------

- -----------------------------------------------------
      Spread @ Center Price          118
                        WAL        9.40505
                   Mod Durn         6.600
              Mod Convexity         0.564
           Principal Window    Jul07 to Sep09
              Maturity #mos          117
           Accrued Interest     1,448,469.75
          Total Collat Loss     0.00 (0.00%)

                     Prepay      At 100 CPR
                 No prepays
      Lockout and penalties    Include penalty

      Extension, if balloon         None
            Increase Coupon
            Pay Exten Princ

                    Default       At 0 CDR
              Loss Severity         0.35
          Servicer Advances     100% of P & I
               Recovery Lag        12 mos

        Optional Redemption
- -----------------------------------------------------

- --------------------------------------------------------------------------------
Investors should read the Underwriters' Statement which accompanies these
Computational Materials.
Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.
- --------------------------------------------------------------------------------


                 Generated by Intex Trader 12/13/1999 12:28 PM
 Information provided herein is believed by INTEX to be accurate; however INTEX
                           cannot guarantee accuracy.
<PAGE>

FUNB99C4_RED, Class AAA_2--Price/Yield

- -------------------------------------------------
CUSIP
Coupon                             7.286
Delay                                14
Stated Maturity                     N/A
Type                              SEN FIX
- -------------------------------------------------

- -------------------------------------------------
Face                       $447,304,000.00
Original Balance           $447,304,000.00
Current Balance            $447,304,000.00
Factor                            1
- -------------------------------------------------

- --------------------------------------------------------
Settle at Pricing
Accrual begins                       12/1/1999
Factor Date                             N/A
- --------------------------------------------------------

YIELD CURVE:  Spread off interpolated node
3MO=5.68, 6MO=5.68, 1YR=5.68, 2YR=5.942, 5YR=6.02, 10YR=6.107, 30YR=6.208

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
                              OCPR;EXT0MO,
                             100% 0%RULES;       15CPR;EXT0MO,100%        25CPR;EXT0MO,100% 0%     5OCPR;EXT0MO,100% 0%
                               OCDR, 35%        0% RULES; 0CDR,35%          RULES; 35CDR,40%          RULES; 0CDR,35%
          PRICE              ADV100% LAG12        ADV100% LAG12              ADV100% LAG12              ADV100% LAG12
                                Yield
- ------------------------------------------------------------------------------------------------------------------------------------
          <S>                  <C>                  <C>                         <C>                        <C>
           98-16               7.5792               7.5793                      7.5793                     7.5795
           98-24               7.5416               7.5417                      7.5417                     7.5419
           99-00               7.5042               7.5042                      7.5042                     7.5044
           99-08               7.4668               7.4669                      7.4669                     7.4670
           99-16               7.4296               7.4296                      7.4297                     7.4297
           99-24               7.3925               7.3925                      7.3925                     7.3925
          100-00               7.3556               7.3556                      7.3555                     7.3555
          100-08               7.3187               7.3187                      7.3187                     7.3186
          100-16               7.2820               7.2820                      7.2819                     7.2818
          100-24               7.2454               7.2453                      7.2453                     7.2451
          101-00               7.2089               7.2088                      7.2088                     7.2086
          101-08               7.1725               7.1724                      7.1724                     7.1721
          101-16               7.1363               7.1362                      7.1361                     7.1358
          101-24               7.1001               7.1000                      7.0999                     7.0996
          102-00               7.0641               7.0639                      7.0638                     7.0635
          102-08               7.0282               7.0280                      7.0279                     7.0275
          102-16               6.9924               6.9922                      6.9921                     6.9916
- -----------------------------------------------------------------------------------------------------------------------------------

<CAPTION>
- -----------------------------------------------------------------------------------------------------------------------------------
      <S>                     <C>                   <C>                     <C>                         <C>
      Spread @ Center Price         118                   118                     118                         118
                        WAL       9.73353               9.72712                 9.72233                     9.70761
                   Mod Durn        6.762                 6.759                   6.757                       6.750
              Mod Convexity        0.594                 0.593                   0.593                       0.592
           Principal Window    Sep08 to Nov09       Sep08 to Nov09           Sep08 to Nov09             Sep08 to Nov09
              Maturity #mos         119                   119                     119                         119
           Accrued Interest     1,448,469.75         1,448,469.75             1,448,469.75               1,448,469.75
          Total Collat Loss     0.00 (0.00%)         0.00 (0.00%)             0.00 (0.00%)               0.00 (0.00%)

                     Prepay       At 0 CPR             At 15 CPR               At 25 CPR                   At 50 CPR
                 No prepays    During any YM         During any YM           During any YM               During any YM
      Lockout and penalties   Include penalty       Include penalty         Include penalty             Include penalty

      Extension, if balloon         None                 None                     None                       None
            Increase Coupon
            Pay Exten Princ

                    Default       At 0 CDR             At 0 CDR                 At 0 CDR                   At 0 CDR
              Loss Severity         0.35                 0.35                     0.35                       0.35
          Servicer Advances    100% of P & I         100% of P & I           100% of P & I               100% of P & I
               Recovery Lag        12 mos               12 mos                   12 mos                     12 mos

        Optional Redemption
- -----------------------------------------------------------------------------------------------------------------------------------
</TABLE>

- -----------------------------------------------------
                               100CPR; EXT0MO
                            100% 0% RULES; 0CDR;
                                35% ADV100%
          PRICE                    LAG12

- -----------------------------------------------------
           98-16                    7.5818
           98-24                    7.5437
           99-00                    7.5057
           99-08                    7.4678
           99-16                    7.4301
           99-24                    7.3925
          100-00                    7.3550
          100-08                    7.3176
          100-16                    7.2803
          100-24                    7.2432
          101-00                    7.2062
          101-08                    7.1693
          101-16                    7.1325
          101-24                    7.0958
          102-00                    7.0593
          102-08                    7.0228
          102-16                    6.9865
- -----------------------------------------------------

- -----------------------------------------------------
      Spread @ Center Price          118
                        WAL        9.53372
                   Mod Durn         6.666
              Mod Convexity         0.576
           Principal Window    Sep08 to Sep09
              Maturity #mos          117
           Accrued Interest     1,448,469.75
          Total Collat Loss     0.00 (0.00%)

                     Prepay      At 100 CPR
                 No prepays     During any YM
      Lockout and penalties    Include penalty

      Extension, if balloon         None
            Increase Coupon
            Pay Exten Princ

                    Default       At 0 CDR
              Loss Severity         0.35
          Servicer Advances     100% of P & I
               Recovery Lag        12 mos

        Optional Redemption
- -----------------------------------------------------

- --------------------------------------------------------------------------------
Investors should read the Underwriters' Statement which accompanies these
Computational Materials.
Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.
- --------------------------------------------------------------------------------


                 Generated by Intex Trader 12/13/1999 12:28 PM
 Information provided herein is believed by INTEX to be accurate; however INTEX
                           cannot guarantee accuracy.
<PAGE>

FUNB99C4_RED, Class AAA_2--Price/Yield

- -------------------------------------------------
CUSIP
Coupon                             7.286
Delay                                14
Stated Maturity                     N/A
Type                              SEN FIX
- -------------------------------------------------

- -------------------------------------------------
Face                       $447,304,000.00
Original Balance           $447,304,000.00
Current Balance            $447,304,000.00
Factor                            1
- -------------------------------------------------

- --------------------------------------------------------
Settle at Pricing
Accrual begins                       12/1/1999
Factor Date                             N/A
- --------------------------------------------------------

YIELD CURVE:  Spread off interpolated node
3MO=5.68, 6MO=5.68, 1YR=5.68, 2YR=5.942, 5YR=6.02, 10YR=6.107, 30YR=6.208

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
                           OCPR; YM; EXT0MO,
                             100% 0%RULES;     0CPR; YM; EXT0MO,100%       0CPR; YM; EXT0MO,100%          OCPR; YM;EXT0MO,100% 0%
                               OCDR, 35%        0% RULES; 0 FOR 24          0% RULES; 0 FOR 24            RULES; 0 FOR 24 3CDR,35%
          PRICE              ADV100% LAG12     1CDR,35%ADV100% LAG12      2CDR,35%ADV100% LAG12                ADV100% LAG12
                                Yield
- ------------------------------------------------------------------------------------------------------------------------------------
          <S>                  <C>                   <C>                        <C>                                <C>
           99-16               7.4296                7.4298                     7.4301                             7.4303
           99-24               7.3925                7.3925                     7.3925                             7.3924
          100-00               7.3556                7.3553                     7.3550                             7.3547
          100-08               7.3187                7.3182                     7.3176                             7.3170
          100-16               7.2820                7.2813                     7.2804                             7.2795
          100-24               7.2454                7.2444                     7.2433                             7.2420
          101-00               7.2089                7.2077                     7.2063                             7.2048
          101-08               7.1725                7.1711                     7.1694                             7.1676
          101-16               7.1363                7.1346                     7.1327                             7.1305
          101-24               7.1001                7.0982                     7.0960                             7.0936
          102-00               7.0641                7.0620                     7.0595                             7.0568
          102-08               7.0282                7.0258                     7.0231                             7.0201
          102-16               6.9924                6.9898                     6.9868                             6.9835
          102-24               6.9567                6.9539                     6.9506                             6.9470
          103-00               6.9211                6.9181                     6.9145                             6.9106
          103-08               6.8857                6.8824                     6.8786                             6.8744
          103-16               6.8503                6.8468                     6.8427                             6.8383
- -----------------------------------------------------------------------------------------------------------------------------------

<CAPTION>
- -----------------------------------------------------------------------------------------------------------------------------------
      <S>                     <C>                  <C>                        <C>                        <C>
      Spread @ Center Price         103                     103                        103                        103
                        WAL       9.73353                 9.64969                    9.55265                    9.44979
                   Mod Durn        6.782                   6.740                      6.690                      6.636
              Mod Convexity        0.597                   0.589                      0.580                      0.571
           Principal Window    Sep08 to Nov09          Sep07 to Nov09             Jun07 to Nov09             May07 to Nov09
              Maturity #mos         119                     119                        119                        119
           Accrued Interest     1,448,469.75            1,448,469.75               1,448,469.75               1,448,469.75
          Total Collat Loss     0.00 (0.00%)       18,522,891.85 (2.09%)      35,963,262.80 (4.06%)      52,380,507.90 (5.91%)

                     Prepay       At 0 CPR                At 0 CPR                   At 0 CPR                   At 0 CPR
                 No prepays    During any YM           During any YM              During any YM              During any YM
      Lockout and penalties   Include penalty         Include penalty            Include penalty            Include penalty

      Extension, if balloon         None                    None                       None                       None
            Increase Coupon
            Pay Exten Princ

                    Default       At 0 CDR           At 0 for 24 1 CDR          At 0 for 24 2 CDR          At 0 for 24 3 CDR
              Loss Severity         0.35                    0.35                       0.35                       0.35
          Servicer Advances    100% of P & I           100% of P & I              100% of P & I              100% of P & I
               Recovery Lag        12 mos                  12 mos                     12 mos                     12 mos

        Optional Redemption
- -----------------------------------------------------------------------------------------------------------------------------------
</TABLE>

- ------------------------------------------------------------------------------
                               OCPR; YM; EXT0MO,
                                 100% 0%RULES;          0CPR; YM; EXT0MO,100%
                              0 FOR 24 4CDR, 35%         0% RULES; 0 FOR 24
          PRICE                  ADV100% LAG12          5CDR,35%ADV100% LAG12

- ------------------------------------------------------------------------------
           99-16                     7.4306                    7.4310
           99-24                     7.3924                    7.3923
          100-00                     7.3543                    7.3538
          100-08                     7.3163                    7.3154
          100-16                     7.2784                    7.2772
          100-24                     7.2407                    7.2390
          101-00                     7.2030                    7.2010
          101-08                     7.1655                    7.1631
          101-16                     7.1282                    7.1254
          101-24                     7.0909                    7.0877
          102-00                     7.0537                    7.0502
          102-08                     7.0167                    7.0128
          102-16                     6.9798                    6.9755
          102-24                     6.9430                    6.9383
          103-00                     6.9063                    6.9012
          103-08                     6.8698                    6.8643
          103-16                     6.8333                    6.8274
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
      Spread @ Center Price              103                      103
                        WAL            9.33865                  9.21235
                   Mod Durn             6.578                    6.510
              Mod Convexity             0.561                    0.550
           Principal Window        Sep06 to Nov09            Mar06 to Nov09
              Maturity #mos              119                      119
           Accrued Interest         1,448,469.75              1,448,469.75
          Total Collat Loss     67,830,857.25 (7.66%)    82,367,557.08 (9.30%)

                     Prepay           At 0 CPR                  At 0 CPR
                 No prepays         During any YM            During any YM
      Lockout and penalties        Include penalty          Include penalty

      Extension, if balloon             None                      None
            Increase Coupon
            Pay Exten Princ

                    Default       At 0 for 24 4 CDR        At 0 for 24 5 CDR
              Loss Severity             0.35                      0.35
          Servicer Advances         100% of P & I            100% of P & I
               Recovery Lag            12 mos                    12 mos

        Optional Redemption
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
Investors should read the Underwriters' Statement which accompanies these
Computational Materials.
Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.
- --------------------------------------------------------------------------------


                 Generated by Intex Trader 12/13/1999 12:28 PM
 Information provided herein is believed by INTEX to be accurate; however INTEX
                           cannot guarantee accuracy.
<PAGE>

FUNB99C4_RED, Class AAA_2--Price/Yield

- -------------------------------------------------
CUSIP
Coupon                             7.286
Delay                                14
Stated Maturity                     N/A
Type                              SEN FIX
- -------------------------------------------------

- -------------------------------------------------
Face                       $447,304,000.00
Original Balance           $447,304,000.00
Current Balance            $447,304,000.00
Factor                            1
- -------------------------------------------------

- --------------------------------------------------------
Settle at Pricing
Accrual begins                       12/1/1999
Factor Date                             N/A
- --------------------------------------------------------

YIELD CURVE:  Spread off interpolated node
3MO=5.68, 6MO=5.68, 1YR=5.68, 2YR=5.942, 5YR=6.02, 10YR=6.107, 30YR=6.208

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
                          5OCPR; YM; EXT0MO,
                             100% 0%RULES;    50CPR; YM; EXT0MO,100%      50CPR; YM; EXT0MO,100%          50CPR; YM;EXT0MO,100% 0%
                               OCDR, 35%        0% RULES; 0 FOR 24          0% RULES; 0 FOR 24            RULES; 0 FOR 24 3CDR,35%
          PRICE              ADV100% LAG12     1CDR,35%ADV100% LAG12      2CDR,35%ADV100% LAG12                ADV100% LAG12
                                Yield
- ------------------------------------------------------------------------------------------------------------------------------------
          <S>                  <C>                   <C>                        <C>                                <C>
          99-16                7.4297                7.4299                     7.4301                             7.4304
          99-24                7.3925                7.3925                     7.3925                             7.3924
          100-00               7.3555                7.3552                     7.3549                             7.3546
          100-08               7.3186                7.3181                     7.3175                             7.3169
          100-16               7.2818                7.2811                     7.2802                             7.2793
          100-24               7.2451                7.2442                     7.2430                             7.2418
          101-00               7.2086                7.2074                     7.2060                             7.2045
          101-08               7.1721                7.1707                     7.1690                             7.1672
          101-16               7.1358                7.1342                     7.1322                             7.1301
          101-24               7.0996                7.0977                     7.0955                             7.0931
          102-00               7.0635                7.0614                     7.0589                             7.0562
          102-08               7.0275                7.0252                     7.0225                             7.0195
          102-16               6.9916                6.9891                     6.9861                             6.9828
          102-24               6.9559                6.9531                     6.9499                             6.9463
          103-00               6.9202                6.9173                     6.9137                             6.9099
          103-08               6.8847                6.8815                     6.8777                             6.8736
          103-16               6.8493                6.8459                     6.8418                             6.8374
- -----------------------------------------------------------------------------------------------------------------------------------

<CAPTION>
- -----------------------------------------------------------------------------------------------------------------------------------
     <S>                     <C>                  <C>                         <C>                        <C>
     Spread @ Center Price         103                     103                         103                        103
                       WAL       9.70761                 9.62547                     9.52944                    9.42764
                  Mod Durn        6.770                   6.728                       6.678                      6.626
             Mod Convexity        0.594                   0.587                       0.578                      0.569
          Principal Window    Sep08 to Nov09          Sep07 to Nov09             Jun07 to Nov09              Apr07 to Nov09
             Maturity #mos         119                     119                         119                        119
          Accrued Interest     1,448,469.75            1,448,469.75               1,448,469.75                1,448,469.75
         Total Collat Loss     0.00 (0.00%)       18,501,051.21 (2.09%)       35,923,812.03 (4.06%)      52,327,108.38 (5.91%)

                    Prepay      At 50 CPR               At 50 CPR                   At 50 CPR                  At 50 CPR
                No prepays    During any YM           During any YM               During any YM              During any YM
     Lockout and penalties   Include penalty         Include penalty             Include penalty            Include penalty

     Extension, if balloon         None                    None                       None                        None
           Increase Coupon
           Pay Exten Princ

                   Default       At 0 CDR           At 0 for 24 1 CDR           At 0 for 24 2 CDR          At 0 for 24 3 CDR
             Loss Severity         0.35                    0.35                       0.35                        0.35
         Servicer Advances    100% of P & I           100% of P & I               100% of P & I              100% of P & I
              Recovery Lag        12 mos                  12 mos                     12 mos                      12 mos

       Optional Redemption
- -----------------------------------------------------------------------------------------------------------------------------------
</TABLE>

- ------------------------------------------------------------------------------
                              5OCPR; YM; EXT0MO,
                                 100% 0%RULES;         50CPR; YM; EXT0MO,100%
                              0 FOR 24 4CDR, 35%         0% RULES; 0 FOR 24
          PRICE                  ADV100% LAG12          5CDR,35%ADV100% LAG12

- ------------------------------------------------------------------------------
          99-16                     7.4307                   7.4310
          99-24                     7.3924                   7.3923
          100-00                    7.3542                   7.3538
          100-08                    7.3162                   7.3153
          100-16                    7.2782                   7.2770
          100-24                    7.2404                   7.2388
          101-00                    7.2027                   7.2007
          101-08                    7.1652                   7.1628
          101-16                    7.1277                   7.1249
          101-24                    7.0904                   7.0872
          102-00                    7.0532                   7.0496
          102-08                    7.0161                   7.0121
          102-16                    6.9791                   6.9748
          102-24                    6.9422                   6.9375
          103-00                    6.9055                   6.9004
          103-08                    6.8689                   6.8634
          103-16                    6.8323                   6.8265
- ------------------------------------------------------------------------------

- ------------------------------------------------------------------------------
     Spread @ Center Price             103                      103
                       WAL           9.31615                  9.19133
                  Mod Durn            6.567                    6.500
             Mod Convexity            0.559                    0.548
          Principal Window        Sep06 to Nov09           Mar06 to Nov09
             Maturity #mos             119                      119
          Accrued Interest         1,448,469.75             1,448,469.75
         Total Collat Loss    67,766,663.87 (7.65%)    82,295,274.97 (9.29%)

                    Prepay          At 50 CPR                At 50 CPR
                No prepays        During any YM            During any YM
     Lockout and penalties       Include penalty          Include penalty

     Extension, if balloon             None                     None
           Increase Coupon
           Pay Exten Princ

                   Default      At 0 for 24 4 CDR        At 0 for 24 5 CDR
             Loss Severity             0.35                     0.35
         Servicer Advances        100% of P & I            100% of P & I
              Recovery Lag            12 mos                   12 mos

       Optional Redemption
- ------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
Investors should read the Underwriters' Statement which accompanies these
Computational Materials.
Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.
- --------------------------------------------------------------------------------


                 Generated by Intex Trader 12/13/1999 12:28 PM
 Information provided herein is believed by INTEX to be accurate; however INTEX
                           cannot guarantee accuracy.
<PAGE>

FUNB99C4_RED, Class AAA_2--Price/Yield

- -------------------------------------------------
CUSIP
Coupon                             7.286
Delay                                14
Stated Maturity                     N/A
Type                              SEN FIX
- -------------------------------------------------

- -------------------------------------------------
Face                       $447,304,000.00
Original Balance           $447,304,000.00
Current Balance            $447,304,000.00
Factor                            1
- -------------------------------------------------

- --------------------------------------------------------
Settle at Pricing
Accrual begins                       12/1/1999
Factor Date                             N/A
- --------------------------------------------------------

YIELD CURVE:  Spread off interpolated node
3MO=5.68, 6MO=5.68, 1YR=5.68, 2YR=5.942, 5YR=6.02, 10YR=6.107, 30YR=6.208

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
                             OCPR; EXT0MO,
                             100% 0%RULES;       0CPR; EXT24MO,50%        0CPR;EXT24MO,100%              50CPR;EXT24MO,100% 0%
                               OCDR, 35%             0% RULES;                0% RULES;                      RULES; 0CDR,0%
          PRICE              ADV100% LAG12     0CDR,0%ADV100% LAG0        0CDR,0%ADV100% LAG0                 ADV100% LAG0
                                Yield
- ------------------------------------------------------------------------------------------------------------------------------------
          <S>                  <C>                   <C>                       <C>                              <C>
           98-16               7.5792                7.5721                    7.5590                           7.5749
           98-24               7.5416                7.5360                    7.5256                           7.5382
           99-00               7.5042                7.5000                    7.4923                           7.5017
           99-08               7.4668                7.4641                    7.4591                           7.4653
           99-16               7.4296                7.4284                    7.4260                           7.4291
           99-24               7.3925                7.3927                    7.3931                           7.3929
          100-00               7.3556                7.3572                    7.3602                           7.3569
          100-08               7.3187                7.3218                    7.3275                           7.3210
          100-16               7.2820                7.2865                    7.2949                           7.2852
          100-24               7.2454                7.2513                    7.2623                           7.2495
          101-00               7.2089                7.2163                    7.2299                           7.2139
          101-08               7.1725                7.1813                    7.1976                           7.1785
          101-16               7.1363                7.1465                    7.1654                           7.1431
          101-24               7.1001                7.1118                    7.1333                           7.1079
          102-00               7.0641                7.0772                    7.1013                           7.0728
          102-08               7.0282                7.0427                    7.0694                           7.0378
          102-16               6.9924                7.0083                    7.0376                           7.0029
- ------------------------------------------------------------------------------------------------------------------------------------

<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
    <S>                     <C>                 <C>                     <C>                               <C>
    Spread @ Center Price         118                   118                     118                               118
                      WAL       9.73353              10.34454                 11.63598                         10.11627
                 Mod Durn        6.762                 7.038                   7.611                             6.938
            Mod Convexity        0.594                 0.651                   0.773                             0.630
         Principal Window    Sep08 to Nov09       Jun09 to Sep11           Sep09 to Nov11                   Feb08 to Mar11
            Maturity #mos         119                   141                     143                               135
         Accrued Interest     1,448,469.75         1,448,469.75             1,448,469.75                     1,448,469.75
        Total Collat Loss     0.00 (0.00%)         0.00 (0.00%)             0.00 (0.00%)                     0.00 (0.00%)

                   Prepay       At 0 CPR             At 0 CPR                 At 0 CPR                         At 50 CPR
               No prepays
    Lockout and penalties   Include penalty       Include penalty         Include penalty                   Include penalty

    Extension, if balloon         None           Extend 50% 24 mos       Extend 100% 24 mos               Extend 100% 24 mos
          Increase Coupon                        0% for extension         0% for extension                 0% for extension
          Pay Exten Princ                       By pre-exten rules       By pre-exten rules               By pre-exten rules

                  Default       At 0 CDR             At 0 CDR                 At 0 CDR                         At 0 CDR
            Loss Severity          0                     0                       0                                 0
        Servicer Advances    100% of P & I         100% of P & I           100% of P & I                     100% of P & I
             Recovery Lag        0 mos                 0 mos                   0 mos                             0 mos

      Optional Redemption
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE>

- ------------------------------------------------------------------------------
                                75CPR;EXT24MO,
                                 100% 0%RULES;          100CPR;EXT24MO,100%
                                   0CDR, 0%                  0% RULES;
          PRICE                  ADV100% LAG0           0CDR,0%ADV100% LAG0

- ------------------------------------------------------------------------------
           98-16                    7.5788                    7.5837
           98-24                    7.5413                    7.5452
           99-00                    7.5040                    7.5068
           99-08                    7.4667                    7.4685
           99-16                    7.4296                    7.4304
           99-24                    7.3926                    7.3924
          100-00                    7.3557                    7.3545
          100-08                    7.3190                    7.3168
          100-16                    7.2824                    7.2792
          100-24                    7.2458                    7.2417
          101-00                    7.2094                    7.2043
          101-08                    7.1732                    7.1670
          101-16                    7.1370                    7.1298
          101-24                    7.1009                    7.0928
          102-00                    7.0650                    7.0559
          102-08                    7.0292                    7.0191
          102-16                    6.9935                    6.9824
- ------------------------------------------------------------------------------

- ------------------------------------------------------------------------------
    Spread @ Center Price             118                      118
                      WAL           9.77633                  9.40550
                 Mod Durn            6.779                    6.600
            Mod Convexity            0.598                    0.564
         Principal Window       Oct07 to May10            Jul07 to Sep09
            Maturity #mos             125                      117
         Accrued Interest        1,448,469.75              1,448,469.75
        Total Collat Loss        0.00 (0.00%)              0.00 (0.00%)

                   Prepay          At 75 CPR                At 100 CPR
               No prepays
    Lockout and penalties       Include penalty          Include penalty

    Extension, if balloon     Extend 100% 24 mos        Extend 100% 24 mos
          Increase Coupon      0% for extension          0% for extension
          Pay Exten Princ     By pre-exten rules        By pre-exten rules

                  Default          At 0 CDR                  At 0 CDR
            Loss Severity             0                        0
        Servicer Advances       100% of P & I            100% of P & I
             Recovery Lag           0 mos                    0 mos

      Optional Redemption
- ------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
Investors should read the Underwriters' Statement which accompanies these
Computational Materials.
Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.
- --------------------------------------------------------------------------------


                 Generated by Intex Trader 12/13/1999 12:28 PM
 Information provided herein is believed by INTEX to be accurate; however INTEX
                           cannot guarantee accuracy.
<PAGE>

- --------------------------------------------------------------------------------
Investors should read the Underwriters' Statement which accompanies these
Computational Materials.
Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
FUNB99C4_RED, CLASS AAA_2
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
- -----------------------------------------------------------------------------------------------
<S>              <C>              <C>              <C>              <C>               <C>
CUSIP                             Face             $447,304,000.00  Settle at Pricing
- -----------------------------------------------------------------------------------------------
Coupon           7.286            Original Balance $447,304,000.00  Accrual begins    12/1/1999
- -----------------------------------------------------------------------------------------------
Delay            14               Current Balance  $447,304,000.00  Factor Date       N/A
- -----------------------------------------------------------------------------------------------
Stated Maturity  N/A              Factor           1
- -----------------------------------------------------------------------------------------------
Type             SEN FIX          WAL 9.73353 yrs
- -----------------------------------------------------------------------------------------------
</TABLE>

- --------------------------------------------------------------------------------
YIELD CURVE:  Spread off interpolated node
- --------------------------------------------------------------------------------
3MO=5.68, 6MO=5.68, 1YR=5.68, 2YR=5.942, 5YR=5.975, 10YR=6.075, 30YR=6.175
- --------------------------------------------------------------------------------

Prepay: At 0 CPR     No prepays: During any YM
- --------------------------------------------------------------------------------
Lockout and penalties: Include penalty    Default: At 0 CDR   Loss Severity: 35%
- --------------------------------------------------------------------------------
Servicer Advances: 100% of P & I  Recovery Lag: 12 mos
- --------------------------------------------------------------------------------
Extension, if balloon: None     Increase Coupon:      Pay Exten Princ:
- --------------------------------------------------------------------------------
Optional Redemption:
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------------------------------------
Period / Date      Principal        Interest         Cash Flow        Balance         Prepay Penalty  Princ Writedown
- ---------------------------------------------------------------------------------------------------------------------
<S>                <C>              <C>              <C>               <C>                      <C>              <C>
Total              447,304,000.00   317,402,316.37   764,706,316.37                             0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------

- ---------------------------------------------------------------------------------------------------------------------
  0. Dec 17, 99              0.00             0.00             0.00    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
  1. Jan 15, 00              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
  2. Feb 15, 00              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
  3. Mar 15, 00              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
  4. Apr 15, 00              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
  5. May 15, 00              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
  6. Jun 15, 00              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
  7. Jul 15, 00              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
  8. Aug 15, 00              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
  9. Sep 15, 00              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 10. Oct 15, 00              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 11. Nov 15, 00              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
</TABLE>

- -----------------------------------------------------------------
Period / Date      Accrued Interest   Interest Shortfall   Coupon
- -----------------------------------------------------------------
Total                317,402,316.37                0.00
- -----------------------------------------------------------------

- -----------------------------------------------------------------
  0. Dec 17, 99                0.00                0.00    0.0000
- -----------------------------------------------------------------
  1. Jan 15, 00        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------
  2. Feb 15, 00        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------
  3. Mar 15, 00        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------
  4. Apr 15, 00        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------
  5. May 15, 00        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------
  6. Jun 15, 00        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------
  7. Jul 15, 00        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------
  8. Aug 15, 00        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------
  9. Sep 15, 00        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------
 10. Oct 15, 00        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------
 11. Nov 15, 00        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------


                 Generated by Intex Trader 12/13/1999 12:28 PM
 Information provided herein is believed by INTEX to be accurate; however INTEX
                           cannot guarantee accuracy.
<PAGE>

- --------------------------------------------------------------------------------
Investors should read the Underwriters' Statement which accompanies these
Computational Materials.
Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------------------------------------
<S>                         <C>       <C>              <C>             <C>                      <C>              <C>
 12. Dec 15, 00              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 13. Jan 15, 01              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 14. Feb 15, 01              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 15. Mar 15, 01              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 16. Apr 15, 01              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 17. May 15, 01              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 18. Jun 15, 01              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 19. Jul 15, 01              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 20. Aug 15, 01              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 21. Sep 15, 01              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 22. Oct 15, 01              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 23. Nov 15, 01              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 24. Dec 15, 01              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 25. Jan 15, 02              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 26. Feb 15, 02              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 27. Mar 15, 02              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 28. Apr 15, 02              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 29. May 15, 02              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 30. Jun 15, 02              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 31. Jul 15, 02              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 32. Aug 15, 02              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 33. Sep 15, 02              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 34. Oct 15, 02              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 35. Nov 15, 02              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 36. Dec 15, 02              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 37. Jan 15, 03              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 38. Feb 15, 03              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 39. Mar 15, 03              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 40. Apr 15, 03              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 41. May 15, 03              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
</TABLE>

- -----------------------------------------------------------------
 12. Dec 15, 00        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------
 13. Jan 15, 01        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------
 14. Feb 15, 01        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------
 15. Mar 15, 01        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------
 16. Apr 15, 01        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------
 17. May 15, 01        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------
 18. Jun 15, 01        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------
 19. Jul 15, 01        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------
 20. Aug 15, 01        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------
 21. Sep 15, 01        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------
 22. Oct 15, 01        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------
 23. Nov 15, 01        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------
 24. Dec 15, 01        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------
 25. Jan 15, 02        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------
 26. Feb 15, 02        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------
 27. Mar 15, 02        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------
 28. Apr 15, 02        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------
 29. May 15, 02        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------
 30. Jun 15, 02        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------
 31. Jul 15, 02        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------
 32. Aug 15, 02        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------
 33. Sep 15, 02        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------
 34. Oct 15, 02        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------
 35. Nov 15, 02        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------
 36. Dec 15, 02        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------
 37. Jan 15, 03        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------
 38. Feb 15, 03        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------
 39. Mar 15, 03        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------
 40. Apr 15, 03        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------
 41. May 15, 03        2,715,880.79                0.00    7.2860
- -----------------------------------------------------------------


                 Generated by Intex Trader 12/13/1999 12:28 PM
 Information provided herein is believed by INTEX to be accurate; however INTEX
                           cannot guarantee accuracy.
<PAGE>

- --------------------------------------------------------------------------------
Investors should read the Underwriters' Statement which accompanies these
Computational Materials.
Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------------------------------------
<S>                         <C>       <C>              <C>             <C>                      <C>              <C>
 42. Jun 15, 03              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 43. Jul 15, 03              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 44. Aug 15, 03              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 45. Sep 15, 03              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 46. Oct 15, 03              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 47. Nov 15, 03              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 48. Dec 15, 03              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 49. Jan 15, 04              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 50. Feb 15, 04              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 51. Mar 15, 04              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 52. Apr 15, 04              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 53. May 15, 04              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 54. Jun 15, 04              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 55. Jul 15, 04              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 56. Aug 15, 04              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 57. Sep 15, 04              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 58. Oct 15, 04              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 59. Nov 15, 04              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 60. Dec 15, 04              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 61. Jan 15, 05              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 62. Feb 15, 05              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 63. Mar 15, 05              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 64. Apr 15, 05              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 65. May 15, 05              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 66. Jun 15, 05              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 67. Jul 15, 05              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 68. Aug 15, 05              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 69. Sep 15, 05              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 70. Oct 15, 05              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 71. Nov 15, 05              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
</TABLE>

- ----------------------------------------------------------------
 42. Jun 15, 03       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 43. Jul 15, 03       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 44. Aug 15, 03       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 45. Sep 15, 03       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 46. Oct 15, 03       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 47. Nov 15, 03       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 48. Dec 15, 03       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 49. Jan 15, 04       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 50. Feb 15, 04       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 51. Mar 15, 04       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 52. Apr 15, 04       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 53. May 15, 04       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 54. Jun 15, 04       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 55. Jul 15, 04       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 56. Aug 15, 04       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 57. Sep 15, 04       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 58. Oct 15, 04       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 59. Nov 15, 04       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 60. Dec 15, 04       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 61. Jan 15, 05       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 62. Feb 15, 05       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 63. Mar 15, 05       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 64. Apr 15, 05       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 65. May 15, 05       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 66. Jun 15, 05       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 67. Jul 15, 05       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 68. Aug 15, 05       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 69. Sep 15, 05       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 70. Oct 15, 05       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 71. Nov 15, 05       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------


                 Generated by Intex Trader 12/13/1999 12:28 PM
 Information provided herein is believed by INTEX to be accurate; however INTEX
                           cannot guarantee accuracy.
<PAGE>

- --------------------------------------------------------------------------------
Investors should read the Underwriters' Statement which accompanies these
Computational Materials.
Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------------------------------------
<S>                         <C>       <C>              <C>             <C>                      <C>              <C>
 72. Dec 15, 05              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 73. Jan 15, 06              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 74. Feb 15, 06              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 75. Mar 15, 06              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 76. Apr 15, 06              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 77. May 15, 06              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 78. Jun 15, 06              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 79. Jul 15, 06              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 80. Aug 15, 06              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 81. Sep 15, 06              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 82. Oct 15, 06              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 83. Nov 15, 06              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 84. Dec 15, 06              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 85. Jan 15, 07              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 86. Feb 15, 07              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 87. Mar 15, 07              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 88. Apr 15, 07              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 89. May 15, 07              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 90. Jun 15, 07              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 91. Jul 15, 07              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 92. Aug 15, 07              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 93. Sep 15, 07              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 94. Oct 15, 07              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 95. Nov 15, 07              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 96. Dec 15, 07              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 97. Jan 15, 08              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 98. Feb 15, 08              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
 99. Mar 15, 08              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
100. Apr 15, 08              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
101. May 15, 08              0.00     2,715,880.79     2,715,880.79    447,304,000.00           0.00             0.00
- ---------------------------------------------------------------------------------------------------------------------
</TABLE>

- ----------------------------------------------------------------
 72. Dec 15, 05       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 73. Jan 15, 06       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 74. Feb 15, 06       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 75. Mar 15, 06       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 76. Apr 15, 06       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 77. May 15, 06       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 78. Jun 15, 06       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 79. Jul 15, 06       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 80. Aug 15, 06       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 81. Sep 15, 06       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 82. Oct 15, 06       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 83. Nov 15, 06       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 84. Dec 15, 06       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 85. Jan 15, 07       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 86. Feb 15, 07       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 87. Mar 15, 07       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 88. Apr 15, 07       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 89. May 15, 07       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 90. Jun 15, 07       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 91. Jul 15, 07       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 92. Aug 15, 07       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 93. Sep 15, 07       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 94. Oct 15, 07       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 95. Nov 15, 07       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 96. Dec 15, 07       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 97. Jan 15, 08       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 98. Feb 15, 08       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
 99. Mar 15, 08       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
100. Apr 15, 08       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------
101. May 15, 08       2,715,880.79                0.00    7.2860
- ----------------------------------------------------------------


                 Generated by Intex Trader 12/13/1999 12:28 PM
 Information provided herein is believed by INTEX to be accurate; however INTEX
                           cannot guarantee accuracy.
<PAGE>

- --------------------------------------------------------------------------------
Investors should read the Underwriters' Statement which accompanies these
Computational Materials.
Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
<S>               <C>              <C>            <C>              <C>               <C>      <C>      <C>             <C>    <C>
102. Jun 15, 08             0.00   2,715,880.79     2,715,880.79   447,304,000.00    0.00     0.00     2,715,880.79    0.00   7.2860
- ------------------------------------------------------------------------------------------------------------------------------------
103. Jul 15, 08             0.00   2,715,880.79     2,715,880.79   447,304,000.00    0.00     0.00     2,715,880.79    0.00   7.2860
- ------------------------------------------------------------------------------------------------------------------------------------
104. Aug 15, 08             0.00   2,715,880.79     2,715,880.79   447,304,000.00    0.00     0.00     2,715,880.79    0.00   7.2860
- ------------------------------------------------------------------------------------------------------------------------------------
105. Sep 15, 08       275,651.56   2,715,880.79     2,991,532.35   447,028,348.44    0.00     0.00     2,715,880.79    0.00   7.2860
- ------------------------------------------------------------------------------------------------------------------------------------
106. Oct 15, 08       940,874.86   2,714,207.12     3,655,081.98   446,087,473.57    0.00     0.00     2,714,207.12    0.00   7.2860
- ------------------------------------------------------------------------------------------------------------------------------------
107. Nov 15, 08     3,819,407.75   2,708,494.44     6,527,902.19   442,268,065.83    0.00     0.00     2,708,494.44    0.00   7.2860
- ------------------------------------------------------------------------------------------------------------------------------------
108. Dec 15, 08     2,565,776.66   2,685,304.27     5,251,080.94   439,702,289.16    0.00     0.00     2,685,304.27    0.00   7.2860
- ------------------------------------------------------------------------------------------------------------------------------------
109. Jan 15, 09       814,218.93   2,669,725.73     3,483,944.66   438,888,070.24    0.00     0.00     2,669,725.73    0.00   7.2860
- ------------------------------------------------------------------------------------------------------------------------------------
110. Feb 15, 09       819,925.43   2,664,782.07     3,484,707.50   438,068,144.80    0.00     0.00     2,664,782.07    0.00   7.2860
- ------------------------------------------------------------------------------------------------------------------------------------
111. Mar 15, 09     1,232,622.78   2,659,803.75     3,892,426.53   436,835,522.02    0.00     0.00     2,659,803.75    0.00   7.2860
- ------------------------------------------------------------------------------------------------------------------------------------
112. Apr 15, 09       834,308.61   2,652,319.68     3,486,628.29   436,001,213.41    0.00     0.00     2,652,319.68    0.00   7.2860
- ------------------------------------------------------------------------------------------------------------------------------------
113. May 15, 09       975,340.76   2,647,254.03     3,622,594.79   435,025,872.65    0.00     0.00     2,647,254.03    0.00   7.2860
- ------------------------------------------------------------------------------------------------------------------------------------
114. Jun 15, 09    32,850,510.39   2,641,332.09    35,491,842.48   402,175,362.26    0.00     0.00     2,641,332.09    0.00   7.2860
- ------------------------------------------------------------------------------------------------------------------------------------
115. Jul 15, 09    32,500,393.09   2,441,874.74    34,942,267.83   369,674,969.18    0.00     0.00     2,441,874.74    0.00   7.2860
- ------------------------------------------------------------------------------------------------------------------------------------
116. Aug 15, 09    28,564,634.89   2,244,543.19    30,809,178.08   341,110,334.28    0.00     0.00     2,244,543.19    0.00   7.2860
- ------------------------------------------------------------------------------------------------------------------------------------
117. Sep 15, 09   146,651,307.20   2,071,108.25   148,722,415.44   194,459,027.09    0.00     0.00     2,071,108.25    0.00   7.2860
- ------------------------------------------------------------------------------------------------------------------------------------
118. Oct 15, 09   152,725,179.51   1,180,690.39   153,905,869.91    41,733,847.57    0.00     0.00     1,180,690.39    0.00   7.2860
- ------------------------------------------------------------------------------------------------------------------------------------
119. Nov 15, 09    41,733,847.57     253,394.01    41,987,241.59             0.00    0.00     0.00       253,394.01    0.00   7.2860
- ------------------------------------------------------------------------------------------------------------------------------------
</TABLE>


                 Generated by Intex Trader 12/13/1999 12:28 PM
 Information provided herein is believed by INTEX to be accurate; however INTEX
                           cannot guarantee accuracy.
<PAGE>

- --------------------------------------------------------------------------------
Investors should read the Underwriters' Statement which accompanies these
Computational Materials.
Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
FUNB99C4_RED, CLASS AAA_2
- --------------------------------------------------------------------------------

<TABLE>
<S>              <C>        <C>               <C>                <C>                <C>
- ---------------------------------------------------------------------------------------------
CUSIP                       Face              $447,304,000.00    Settle at Pricing
- ---------------------------------------------------------------------------------------------
Coupon           7.286      Original Balance  $447,304,000.00    Accrual begins     12/1/1999
- ---------------------------------------------------------------------------------------------
Delay            14         Current Balance   $447,304,000.00    Factor Date        N/A
- ---------------------------------------------------------------------------------------------
Stated Maturity  N/A        Factor            1
- ---------------------------------------------------------------------------------------------
Type             SEN FIX    WAL 9.40505 yrs
- ---------------------------------------------------------------------------------------------
</TABLE>

- --------------------------------------------------------------------------------
YIELD CURVE:  Spread off Interpolated node
- --------------------------------------------------------------------------------
3MO=5.68, 6MO=5.68, 1YR=5.68, 2YR=5.942, 5YR=6.02, 10YR=6.107, 30YR=6.208
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
Prepay: At 100 CPR   No prepays:   Lockout and penalties: Include penalty
- --------------------------------------------------------------------------------
Default: At 0 CDR    Loss Severity: 0%     Servicer Advances: 100% of P & I
- --------------------------------------------------------------------------------
Recovery Lag: 0 mos  Extension, if balloon: None
- --------------------------------------------------------------------------------
Increase Coupon:  Pay Exten Princ:    Optional Redemption:
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
- ----------------------------------------------------------------------------------------------------------------------
Period / Date     Principal        Interest         Cash Flow         Balance         Prepay Penalty  Princ Writedown
<S>                <C>              <C>              <C>              <C>                     <C>                <C>
- ----------------------------------------------------------------------------------------------------------------------
Total              447,304,000.00   306,697,134.85   754,001,134.85                           159.68             0.00
- ----------------------------------------------------------------------------------------------------------------------

- ----------------------------------------------------------------------------------------------------------------------
  0. Dec 17, 99              0.00             0.00             0.00   447,304,000.00            0.00             0.00
- ----------------------------------------------------------------------------------------------------------------------
  1. Jan 15, 00              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ----------------------------------------------------------------------------------------------------------------------
  2. Feb 15, 00              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ----------------------------------------------------------------------------------------------------------------------
  3. Mar 15, 00              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ----------------------------------------------------------------------------------------------------------------------
  4. Apr 15, 00              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ----------------------------------------------------------------------------------------------------------------------
  5. May 15, 00              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ----------------------------------------------------------------------------------------------------------------------
  6. Jun 15, 00              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ----------------------------------------------------------------------------------------------------------------------
  7. Jul 15, 00              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ----------------------------------------------------------------------------------------------------------------------
  8. Aug 15, 00              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ----------------------------------------------------------------------------------------------------------------------
  9. Sep 15, 00              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ----------------------------------------------------------------------------------------------------------------------
 10. Oct 15, 00              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ----------------------------------------------------------------------------------------------------------------------
 11. Nov 15, 00              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ----------------------------------------------------------------------------------------------------------------------

<CAPTION>
- ----------------------------------------------------------------
Period / Date     Accrued Interest   Interest Shortfall   Coupon
<S>                 <C>                          <C>      <C>
- ----------------------------------------------------------------
Total               306,696,975.17               0.00
- ----------------------------------------------------------------

- ----------------------------------------------------------------
  0. Dec 17, 99               0.00               0.00     0.0000
- ----------------------------------------------------------------
  1. Jan 15, 00       2,715,880.79               0.00     7.2860
- ----------------------------------------------------------------
  2. Feb 15, 00       2,715,880.79               0.00     7.2860
- ----------------------------------------------------------------
  3. Mar 15, 00       2,715,880.79               0.00     7.2860
- ----------------------------------------------------------------
  4. Apr 15, 00       2,715,880.79               0.00     7.2860
- ----------------------------------------------------------------
  5. May 15, 00       2,715,880.79               0.00     7.2860
- ----------------------------------------------------------------
  6. Jun 15, 00       2,715,880.79               0.00     7.2860
- ----------------------------------------------------------------
  7. Jul 15, 00       2,715,880.79               0.00     7.2860
- ----------------------------------------------------------------
  8. Aug 15, 00       2,715,880.79               0.00     7.2860
- ----------------------------------------------------------------
  9. Sep 15, 00       2,715,880.79               0.00     7.2860
- ----------------------------------------------------------------
 10. Oct 15, 00       2,715,880.79               0.00     7.2860
- ----------------------------------------------------------------
 11. Nov 15, 00       2,715,880.79               0.00     7.2860
- ----------------------------------------------------------------
</TABLE>


                 Generated by Intex Trader 12/13/1999 12:28 PM
 Information provided herein is believed by INTEX to be accurate; however INTEX
                           cannot guarantee accuracy.
<PAGE>

- --------------------------------------------------------------------------------
Investors should read the Underwriters' Statement which accompanies these
Computational Materials.
Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
- -----------------------------------------------------------------------------------------------------------------------
<S>                          <C>      <C>              <C>            <C>                       <C>              <C>
 12. Dec 15, 00              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 13. Jan 15, 01              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 14. Feb 15, 01              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 15. Mar 15, 01              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 16. Apr 15, 01              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 17. May 15, 01              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 18. Jun 15, 01              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 19. Jul 15, 01              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 20. Aug 15, 01              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 21. Sep 15, 01              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 22. Oct 15, 01              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 23. Nov 15, 01              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 24. Dec 15, 01              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 25. Jan 15, 02              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 26. Feb 15, 02              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 27. Mar 15, 02              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 28. Apr 15, 02              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 29. May 15, 02              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 30. Jun 15, 02              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 31. Jul 15, 02              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 32. Aug 15, 02              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 33. Sep 15, 02              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 34. Oct 15, 02              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 35. Nov 15, 02              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 36. Dec 15, 02              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 37. Jan 15, 03              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 38. Feb 15, 03              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 39. Mar 15, 03              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 40. Apr 15, 03              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 41. May 15, 03              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------

<CAPTION>
- ---------------------------------------------------------------
<S>                  <C>                        <C>      <C>
 12. Dec 15, 00      2,715,880.79               0.00     7.2860
- ---------------------------------------------------------------
 13. Jan 15, 01      2,715,880.79               0.00     7.2860
- ---------------------------------------------------------------
 14. Feb 15, 01      2,715,880.79               0.00     7.2860
- ---------------------------------------------------------------
 15. Mar 15, 01      2,715,880.79               0.00     7.2860
- ---------------------------------------------------------------
 16. Apr 15, 01      2,715,880.79               0.00     7.2860
- ---------------------------------------------------------------
 17. May 15, 01      2,715,880.79               0.00     7.2860
- ---------------------------------------------------------------
 18. Jun 15, 01      2,715,880.79               0.00     7.2860
- ---------------------------------------------------------------
 19. Jul 15, 01      2,715,880.79               0.00     7.2860
- ---------------------------------------------------------------
 20. Aug 15, 01      2,715,880.79               0.00     7.2860
- ---------------------------------------------------------------
 21. Sep 15, 01      2,715,880.79               0.00     7.2860
- ---------------------------------------------------------------
 22. Oct 15, 01      2,715,880.79               0.00     7.2860
- ---------------------------------------------------------------
 23. Nov 15, 01      2,715,880.79               0.00     7.2860
- ---------------------------------------------------------------
 24. Dec 15, 01      2,715,880.79               0.00     7.2860
- ---------------------------------------------------------------
 25. Jan 15, 02      2,715,880.79               0.00     7.2860
- ---------------------------------------------------------------
 26. Feb 15, 02      2,715,880.79               0.00     7.2860
- ---------------------------------------------------------------
 27. Mar 15, 02      2,715,880.79               0.00     7.2860
- ---------------------------------------------------------------
 28. Apr 15, 02      2,715,880.79               0.00     7.2860
- ---------------------------------------------------------------
 29. May 15, 02      2,715,880.79               0.00     7.2860
- ---------------------------------------------------------------
 30. Jun 15, 02      2,715,880.79               0.00     7.2860
- ---------------------------------------------------------------
 31. Jul 15, 02      2,715,880.79               0.00     7.2860
- ---------------------------------------------------------------
 32. Aug 15, 02      2,715,880.79               0.00     7.2860
- ---------------------------------------------------------------
 33. Sep 15, 02      2,715,880.79               0.00     7.2860
- ---------------------------------------------------------------
 34. Oct 15, 02      2,715,880.79               0.00     7.2860
- ---------------------------------------------------------------
 35. Nov 15, 02      2,715,880.79               0.00     7.2860
- ---------------------------------------------------------------
 36. Dec 15, 02      2,715,880.79               0.00     7.2860
- ---------------------------------------------------------------
 37. Jan 15, 03      2,715,880.79               0.00     7.2860
- ---------------------------------------------------------------
 38. Feb 15, 03      2,715,880.79               0.00     7.2860
- ---------------------------------------------------------------
 39. Mar 15, 03      2,715,880.79               0.00     7.2860
- ---------------------------------------------------------------
 40. Apr 15, 03      2,715,880.79               0.00     7.2860
- ---------------------------------------------------------------
 41. May 15, 03      2,715,880.79               0.00     7.2860
- ---------------------------------------------------------------
</TABLE>


                 Generated by Intex Trader 12/13/1999 12:28 PM
 Information provided herein is believed by INTEX to be accurate; however INTEX
                           cannot guarantee accuracy.
<PAGE>

- --------------------------------------------------------------------------------
Investors should read the Underwriters' Statement which accompanies these
Computational Materials.
Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------
<S>                          <C>      <C>              <C>            <C>                       <C>              <C>
 42. Jun 15, 03              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------
 43. Jul 15, 03              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------
 44. Aug 15, 03              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------
 45. Sep 15, 03              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------
 46. Oct 15, 03              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------
 47. Nov 15, 03              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------
 48. Dec 15, 03              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------
 49. Jan 15, 04              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------
 50. Feb 15, 04              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------
 51. Mar 15, 04              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------
 52. Apr 15, 04              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------
 53. May 15, 04              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------
 54. Jun 15, 04              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------
 55. Jul 15, 04              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------
 56. Aug 15, 04              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------
 57. Sep 15, 04              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------
 58. Oct 15, 04              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------
 59. Nov 15, 04              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------
 60. Dec 15, 04              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------
 61. Jan 15, 05              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------
 62. Feb 15, 05              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------
 63. Mar 15, 05              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------
 64. Apr 15, 05              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------
 65. May 15, 05              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------
 66. Jun 15, 05              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------
 67. Jul 15, 05              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------
 68. Aug 15, 05              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------
 69. Sep 15, 05              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------
 70. Oct 15, 05              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------
 71. Nov 15, 05              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------

<CAPTION>
- -----------------------------------------------------------------
<S>                    <C>                        <C>      <C>
 42. Jun 15, 03        2,715,880.79               0.00     7.2860
- -----------------------------------------------------------------
 43. Jul 15, 03        2,715,880.79               0.00     7.2860
- -----------------------------------------------------------------
 44. Aug 15, 03        2,715,880.79               0.00     7.2860
- -----------------------------------------------------------------
 45. Sep 15, 03        2,715,880.79               0.00     7.2860
- -----------------------------------------------------------------
 46. Oct 15, 03        2,715,880.79               0.00     7.2860
- -----------------------------------------------------------------
 47. Nov 15, 03        2,715,880.79               0.00     7.2860
- -----------------------------------------------------------------
 48. Dec 15, 03        2,715,880.79               0.00     7.2860
- -----------------------------------------------------------------
 49. Jan 15, 04        2,715,880.79               0.00     7.2860
- -----------------------------------------------------------------
 50. Feb 15, 04        2,715,880.79               0.00     7.2860
- -----------------------------------------------------------------
 51. Mar 15, 04        2,715,880.79               0.00     7.2860
- -----------------------------------------------------------------
 52. Apr 15, 04        2,715,880.79               0.00     7.2860
- -----------------------------------------------------------------
 53. May 15, 04        2,715,880.79               0.00     7.2860
- -----------------------------------------------------------------
 54. Jun 15, 04        2,715,880.79               0.00     7.2860
- -----------------------------------------------------------------
 55. Jul 15, 04        2,715,880.79               0.00     7.2860
- -----------------------------------------------------------------
 56. Aug 15, 04        2,715,880.79               0.00     7.2860
- -----------------------------------------------------------------
 57. Sep 15, 04        2,715,880.79               0.00     7.2860
- -----------------------------------------------------------------
 58. Oct 15, 04        2,715,880.79               0.00     7.2860
- -----------------------------------------------------------------
 59. Nov 15, 04        2,715,880.79               0.00     7.2860
- -----------------------------------------------------------------
 60. Dec 15, 04        2,715,880.79               0.00     7.2860
- -----------------------------------------------------------------
 61. Jan 15, 05        2,715,880.79               0.00     7.2860
- -----------------------------------------------------------------
 62. Feb 15, 05        2,715,880.79               0.00     7.2860
- -----------------------------------------------------------------
 63. Mar 15, 05        2,715,880.79               0.00     7.2860
- -----------------------------------------------------------------
 64. Apr 15, 05        2,715,880.79               0.00     7.2860
- -----------------------------------------------------------------
 65. May 15, 05        2,715,880.79               0.00     7.2860
- -----------------------------------------------------------------
 66. Jun 15, 05        2,715,880.79               0.00     7.2860
- -----------------------------------------------------------------
 67. Jul 15, 05        2,715,880.79               0.00     7.2860
- -----------------------------------------------------------------
 68. Aug 15, 05        2,715,880.79               0.00     7.2860
- -----------------------------------------------------------------
 69. Sep 15, 05        2,715,880.79               0.00     7.2860
- -----------------------------------------------------------------
 70. Oct 15, 05        2,715,880.79               0.00     7.2860
- -----------------------------------------------------------------
 71. Nov 15, 05        2,715,880.79               0.00     7.2860
- -----------------------------------------------------------------
</TABLE>


                 Generated by Intex Trader 12/13/1999 12:28 PM
 Information provided herein is believed by INTEX to be accurate; however INTEX
                           cannot guarantee accuracy.
<PAGE>

- --------------------------------------------------------------------------------
Investors should read the Underwriters' Statement which accompanies these
Computational Materials.
Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
- -----------------------------------------------------------------------------------------------------------------------
<S>                 <C>               <C>              <C>            <C>                       <C>              <C>
 72. Dec 15, 05              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 73. Jan 15, 06              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 74. Feb 15, 06              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 75. Mar 15, 06              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 76. Apr 15, 06              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 77. May 15, 06              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 78. Jun 15, 06              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 79. Jul 15, 06              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 80. Aug 15, 06              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 81. Sep 15, 06              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 82. Oct 15, 06              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 83. Nov 15, 06              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 84. Dec 15, 06              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 85. Jan 15, 07              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 86. Feb 15, 07              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 87. Mar 15, 07              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 88. Apr 15, 07              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 89. May 15, 07              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 90. Jun 15, 07              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 91. Jul 15, 07     19,057,109.36     2,715,880.79    21,772,990.14   428,246,890.64            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 92. Aug 15, 07        708,256.32     2,600,172.37     3,308,428.69   427,538,634.32            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 93. Sep 15, 07        713,227.79     2,595,872.07     3,309,099.87   426,825,406.53            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 94. Oct 15, 07        854,777.39     2,591,541.59     3,446,318.98   425,970,629.14            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 95. Nov 15, 07        724,233.35     2,586,351.67     3,310,585.02   425,246,395.79            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 96. Dec 15, 07        865,505.88     2,581,954.37     3,447,460.24   424,380,889.91            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 97. Jan 15, 08        735,391.72     2,576,699.30     3,312,091.03   423,645,498.19            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 98. Feb 15, 08        740,553.98     2,572,234.25     3,312,788.23   422,904,944.21            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
 99. Mar 15, 08      1,017,078.97     2,567,737.85     3,584,816.82   421,887,865.24            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
100. Apr 15, 08        752,890.28     2,561,562.49     3,314,452.77   421,134,974.96            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
101. May 15, 08        893,441.21     2,556,991.19     3,450,432.40   420,241,533.75            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------

<CAPTION>
- ----------------------------------------------------------------
<S>                   <C>                        <C>      <C>
 72. Dec 15, 05       2,715,880.79               0.00     7.2860
- ----------------------------------------------------------------
 73. Jan 15, 06       2,715,880.79               0.00     7.2860
- ----------------------------------------------------------------
 74. Feb 15, 06       2,715,880.79               0.00     7.2860
- ----------------------------------------------------------------
 75. Mar 15, 06       2,715,880.79               0.00     7.2860
- ----------------------------------------------------------------
 76. Apr 15, 06       2,715,880.79               0.00     7.2860
- ----------------------------------------------------------------
 77. May 15, 06       2,715,880.79               0.00     7.2860
- ----------------------------------------------------------------
 78. Jun 15, 06       2,715,880.79               0.00     7.2860
- ----------------------------------------------------------------
 79. Jul 15, 06       2,715,880.79               0.00     7.2860
- ----------------------------------------------------------------
 80. Aug 15, 06       2,715,880.79               0.00     7.2860
- ----------------------------------------------------------------
 81. Sep 15, 06       2,715,880.79               0.00     7.2860
- ----------------------------------------------------------------
 82. Oct 15, 06       2,715,880.79               0.00     7.2860
- ----------------------------------------------------------------
 83. Nov 15, 06       2,715,880.79               0.00     7.2860
- ----------------------------------------------------------------
 84. Dec 15, 06       2,715,880.79               0.00     7.2860
- ----------------------------------------------------------------
 85. Jan 15, 07       2,715,880.79               0.00     7.2860
- ----------------------------------------------------------------
 86. Feb 15, 07       2,715,880.79               0.00     7.2860
- ----------------------------------------------------------------
 87. Mar 15, 07       2,715,880.79               0.00     7.2860
- ----------------------------------------------------------------
 88. Apr 15, 07       2,715,880.79               0.00     7.2860
- ----------------------------------------------------------------
 89. May 15, 07       2,715,880.79               0.00     7.2860
- ----------------------------------------------------------------
 90. Jun 15, 07       2,715,880.79               0.00     7.2860
- ----------------------------------------------------------------
 91. Jul 15, 07       2,715,880.79               0.00     7.2860
- ----------------------------------------------------------------
 92. Aug 15, 07       2,600,172.37               0.00     7.2860
- ----------------------------------------------------------------
 93. Sep 15, 07       2,595,872.07               0.00     7.2860
- ----------------------------------------------------------------
 94. Oct 15, 07       2,591,541.59               0.00     7.2860
- ----------------------------------------------------------------
 95. Nov 15, 07       2,586,351.67               0.00     7.2860
- ----------------------------------------------------------------
 96. Dec 15, 07       2,581,954.37               0.00     7.2860
- ----------------------------------------------------------------
 97. Jan 15, 08       2,576,699.30               0.00     7.2860
- ----------------------------------------------------------------
 98. Feb 15, 08       2,572,234.25               0.00     7.2860
- ----------------------------------------------------------------
 99. Mar 15, 08       2,567,737.85               0.00     7.2860
- ----------------------------------------------------------------
100. Apr 15, 08       2,561,562.49               0.00     7.2860
- ----------------------------------------------------------------
101. May 15, 08       2,556,991.19               0.00     7.2860
- ----------------------------------------------------------------
</TABLE>


                 Generated by Intex Trader 12/13/1999 12:28 PM
 Information provided herein is believed by INTEX to be accurate; however INTEX
                           cannot guarantee accuracy.
<PAGE>

- --------------------------------------------------------------------------------
Investors should read the Underwriters' Statement which accompanies these
Computational Materials.
Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
- -----------------------------------------------------------------------------------------------------------------------
<S>                <C>                <C>             <C>             <C>                     <C>                <C>
102. Jun 15, 08      3,187,060.75     2,551,566.51     5,738,627.26   417,054,473.00            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
103. Jul 15, 08        900,882.22     2,532,215.74     3,433,097.96   416,153,590.78            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
104. Aug 15, 08        772,311.61     2,526,745.89     3,299,057.49   415,381,279.17            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
105. Sep 15, 08      5,117,266.48     2,522,056.67     7,639,323.15   410,264,012.69            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
106. Oct 15, 08        908,732.40     2,490,986.33     3,399,718.73   409,355,280.29            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
107. Nov 15, 08        781,674.65     2,485,468.81     3,267,143.46   408,573,605.63            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
108. Dec 15, 08     15,243,552.57     2,480,722.74    17,724,275.31   393,330,053.06            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
109. Jan 15, 09        741,621.80     2,388,168.97     3,129,790.78   392,588,431.26            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
110. Feb 15, 09        746,820.99     2,383,666.09     3,130,487.08   391,841,610.27            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
111. Mar 15, 09     24,540,771.04     2,379,131.64    26,919,902.68   367,300,839.23            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
112. Apr 15, 09     11,827,833.94     2,230,128.26    14,057,962.20   355,473,005.29            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
113. May 15, 09     43,806,786.82     2,158,313.60    45,965,100.41   311,666,218.48            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
114. Jun 15, 09     35,660,652.31     1,892,333.39    37,552,985.70   276,005,566.16            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
115. Jul 15, 09    105,956,614.32     1,675,813.80   107,632,428.11   170,048,951.84            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
116. Aug 15, 09    164,958,515.32     1,032,480.55   165,990,995.87     5,090,436.52            0.00             0.00
- -----------------------------------------------------------------------------------------------------------------------
117. Sep 15, 09      5,090,436.52        31,067.11     5,121,503.64             0.00          159.68             0.00
- -----------------------------------------------------------------------------------------------------------------------

<CAPTION>
- ---------------------------------------------------------------
<S>                  <C>                        <C>      <C>
102. Jun 15, 08      2,551,566.51               0.00     7.2860
- ---------------------------------------------------------------
103. Jul 15, 08      2,532,215.74               0.00     7.2860
- ---------------------------------------------------------------
104. Aug 15, 08      2,526,745.89               0.00     7.2860
- ---------------------------------------------------------------
105. Sep 15, 08      2,522,056.67               0.00     7.2860
- ---------------------------------------------------------------
106. Oct 15, 08      2,490,986.33               0.00     7.2860
- ---------------------------------------------------------------
107. Nov 15, 08      2,485,468.81               0.00     7.2860
- ---------------------------------------------------------------
108. Dec 15, 08      2,480,722.74               0.00     7.2860
- ---------------------------------------------------------------
109. Jan 15, 09      2,388,168.97               0.00     7.2860
- ---------------------------------------------------------------
110. Feb 15, 09      2,383,666.09               0.00     7.2860
- ---------------------------------------------------------------
111. Mar 15, 09      2,379,131.64               0.00     7.2860
- ---------------------------------------------------------------
112. Apr 15, 09      2,230,128.26               0.00     7.2860
- ---------------------------------------------------------------
113. May 15, 09      2,158,313.60               0.00     7.2860
- ---------------------------------------------------------------
114. Jun 15, 09      1,892,333.39               0.00     7.2860
- ---------------------------------------------------------------
115. Jul 15, 09      1,675,813.80               0.00     7.2860
- ---------------------------------------------------------------
116. Aug 15, 09      1,032,480.55               0.00     7.2860
- ---------------------------------------------------------------
117. Sep 15, 09         30,907.43               0.00     7.2860
- ---------------------------------------------------------------
</TABLE>


                 Generated by Intex Trader 12/13/1999 12:28 PM
 Information provided herein is believed by INTEX to be accurate; however INTEX
                           cannot guarantee accuracy.
<PAGE>

- --------------------------------------------------------------------------------
Investors should read the Underwriters' Statement which accompanies these
Computational Materials.
Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
FUNB99C4_RED, CLASS AAA_2
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
- -----------------------------------------------------------------------------------------------------
<S>                 <C>         <C>                 <C>                 <C>                 <C>
CUSIP                           Face                $447,304,000.00     Settle at Pricing
- -----------------------------------------------------------------------------------------------------
Coupon              7.286       Original Balance    $447,304,000.00     Accrual begins      12/1/1999
- -----------------------------------------------------------------------------------------------------
Delay               14          Current Balance     $447,304,000.00     Factor Date         N/A
- -----------------------------------------------------------------------------------------------------
Stated Maturity     N/A         Factor              1
- -----------------------------------------------------------------------------------------------------
Type                SEN FIX     WAL 11.63598 yrs
- -----------------------------------------------------------------------------------------------------
</TABLE>

- --------------------------------------------------------------------------------
YIELD CURVE:  Spread off Interpolated node
- --------------------------------------------------------------------------------
3MO=5.68, 6MO=5.68, 1YR=5.68, 2YR=5.942, 5YR=6.02, 10YR=6.107, 30YR=6.208
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
Prepay: At 0 CPR   No prepays:    Lockout and penalties: Include penalty
- --------------------------------------------------------------------------------
Default: At 0 CDR   Loss Severity: 0%   Servicer Advances: 100% of P & I
- --------------------------------------------------------------------------------
Recovery Lag: 0 mos  Extension, if balloon: Extend 100% 24 mos
- --------------------------------------------------------------------------------
Increase Coupon: 0% for extension     Pay Exten Princ: By pre-exten rules
- --------------------------------------------------------------------------------
Optional Redemption:
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
Period / Date         Principal           Interest            Cash Flow           Balance            Prepay Penalty  Princ Writedown
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                      <C>                 <C>                 <C>                 <C>                       <C>              <C>
Total                    447,304,000.00      379,404,264.31      826,708,264.31                                0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------

- ------------------------------------------------------------------------------------------------------------------------------------
  0. Dec 17, 99                    0.00                0.00                0.00      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
  1. Jan 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
  2. Feb 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
  3. Mar 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
  4. Apr 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
  5. May 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
  6. Jun 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
  7. Jul 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
  8. Aug 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
  9. Sep 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 10. Oct 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 11. Nov 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------

<CAPTION>
- ------------------------------------------------------------------
Period / Date     Accrued Interest  Interest Shortfall      Coupon
- ------------------------------------------------------------------
<S>                 <C>                           <C>
Total               379,404,264.31                0.00
- ------------------------------------------------------------------

- ------------------------------------------------------------------
  0. Dec 17, 99               0.00                0.00      0.0000
- ------------------------------------------------------------------
  1. Jan 15, 00       2,715,880.79                0.00      7.2860
- ------------------------------------------------------------------
  2. Feb 15, 00       2,715,880.79                0.00      7.2860
- ------------------------------------------------------------------
  3. Mar 15, 00       2,715,880.79                0.00      7.2860
- ------------------------------------------------------------------
  4. Apr 15, 00       2,715,880.79                0.00      7.2860
- ------------------------------------------------------------------
  5. May 15, 00       2,715,880.79                0.00      7.2860
- ------------------------------------------------------------------
  6. Jun 15, 00       2,715,880.79                0.00      7.2860
- ------------------------------------------------------------------
  7. Jul 15, 00       2,715,880.79                0.00      7.2860
- ------------------------------------------------------------------
  8. Aug 15, 00       2,715,880.79                0.00      7.2860
- ------------------------------------------------------------------
  9. Sep 15, 00       2,715,880.79                0.00      7.2860
- ------------------------------------------------------------------
 10. Oct 15, 00       2,715,880.79                0.00      7.2860
- ------------------------------------------------------------------
 11. Nov 15, 00       2,715,880.79                0.00      7.2860
- ------------------------------------------------------------------
</TABLE>


                 Generated by Intex Trader 12/13/1999 12:28 PM
 Information provided herein is believed by INTEX to be accurate; however INTEX
                           cannot guarantee accuracy.
<PAGE>

- --------------------------------------------------------------------------------
Investors should read the Underwriters' Statement which accompanies these
Computational Materials.
Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                                <C>         <C>                 <C>               <C>                       <C>              <C>
 12. Dec 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 13. Jan 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 14. Feb 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 15. Mar 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 16. Apr 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 17. May 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 18. Jun 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 19. Jul 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 20. Aug 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 21. Sep 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 22. Oct 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 23. Nov 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 24. Dec 15, 01                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 25. Jan 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 26. Feb 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 27. Mar 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 28. Apr 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 29. May 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 30. Jun 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 31. Jul 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 32. Aug 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 33. Sep 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 34. Oct 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 35. Nov 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 36. Dec 15, 02                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 37. Jan 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 38. Feb 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 39. Mar 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 40. Apr 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 41. May 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------

<CAPTION>
- -----------------------------------------------------------------
<S>                  <C>                         <C>       <C>
 12. Dec 15, 00      2,715,880.79                0.00      7.2860
- -----------------------------------------------------------------
 13. Jan 15, 01      2,715,880.79                0.00      7.2860
- -----------------------------------------------------------------
 14. Feb 15, 01      2,715,880.79                0.00      7.2860
- -----------------------------------------------------------------
 15. Mar 15, 01      2,715,880.79                0.00      7.2860
- -----------------------------------------------------------------
 16. Apr 15, 01      2,715,880.79                0.00      7.2860
- -----------------------------------------------------------------
 17. May 15, 01      2,715,880.79                0.00      7.2860
- -----------------------------------------------------------------
 18. Jun 15, 01      2,715,880.79                0.00      7.2860
- -----------------------------------------------------------------
 19. Jul 15, 01      2,715,880.79                0.00      7.2860
- -----------------------------------------------------------------
 20. Aug 15, 01      2,715,880.79                0.00      7.2860
- -----------------------------------------------------------------
 21. Sep 15, 01      2,715,880.79                0.00      7.2860
- -----------------------------------------------------------------
 22. Oct 15, 01      2,715,880.79                0.00      7.2860
- -----------------------------------------------------------------
 23. Nov 15, 01      2,715,880.79                0.00      7.2860
- -----------------------------------------------------------------
 24. Dec 15, 01      2,715,880.79                0.00      7.2860
- -----------------------------------------------------------------
 25. Jan 15, 02      2,715,880.79                0.00      7.2860
- -----------------------------------------------------------------
 26. Feb 15, 02      2,715,880.79                0.00      7.2860
- -----------------------------------------------------------------
 27. Mar 15, 02      2,715,880.79                0.00      7.2860
- -----------------------------------------------------------------
 28. Apr 15, 02      2,715,880.79                0.00      7.2860
- -----------------------------------------------------------------
 29. May 15, 02      2,715,880.79                0.00      7.2860
- -----------------------------------------------------------------
 30. Jun 15, 02      2,715,880.79                0.00      7.2860
- -----------------------------------------------------------------
 31. Jul 15, 02      2,715,880.79                0.00      7.2860
- -----------------------------------------------------------------
 32. Aug 15, 02      2,715,880.79                0.00      7.2860
- -----------------------------------------------------------------
 33. Sep 15, 02      2,715,880.79                0.00      7.2860
- -----------------------------------------------------------------
 34. Oct 15, 02      2,715,880.79                0.00      7.2860
- -----------------------------------------------------------------
 35. Nov 15, 02      2,715,880.79                0.00      7.2860
- -----------------------------------------------------------------
 36. Dec 15, 02      2,715,880.79                0.00      7.2860
- -----------------------------------------------------------------
 37. Jan 15, 03      2,715,880.79                0.00      7.2860
- -----------------------------------------------------------------
 38. Feb 15, 03      2,715,880.79                0.00      7.2860
- -----------------------------------------------------------------
 39. Mar 15, 03      2,715,880.79                0.00      7.2860
- -----------------------------------------------------------------
 40. Apr 15, 03      2,715,880.79                0.00      7.2860
- -----------------------------------------------------------------
 41. May 15, 03      2,715,880.79                0.00      7.2860
- -----------------------------------------------------------------
</TABLE>


                 Generated by Intex Trader 12/13/1999 12:28 PM
 Information provided herein is believed by INTEX to be accurate; however INTEX
                           cannot guarantee accuracy.
<PAGE>

- --------------------------------------------------------------------------------
Investors should read the Underwriters' Statement which accompanies these
Computational Materials.
Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                                <C>         <C>                 <C>               <C>                       <C>              <C>
 42. Jun 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 43. Jul 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 44. Aug 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 45. Sep 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 46. Oct 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 47. Nov 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 48. Dec 15, 03                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 49. Jan 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 50. Feb 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 51. Mar 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 52. Apr 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 53. May 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 54. Jun 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 55. Jul 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 56. Aug 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 57. Sep 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 58. Oct 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 59. Nov 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 60. Dec 15, 04                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 61. Jan 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 62. Feb 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 63. Mar 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 64. Apr 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 65. May 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 66. Jun 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 67. Jul 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 68. Aug 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 69. Sep 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 70. Oct 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 71. Nov 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------

<CAPTION>
- --------------------------------------------------------------------
<S>                     <C>                         <C>       <C>
 42. Jun 15, 03         2,715,880.79                0.00      7.2860
- --------------------------------------------------------------------
 43. Jul 15, 03         2,715,880.79                0.00      7.2860
- --------------------------------------------------------------------
 44. Aug 15, 03         2,715,880.79                0.00      7.2860
- --------------------------------------------------------------------
 45. Sep 15, 03         2,715,880.79                0.00      7.2860
- --------------------------------------------------------------------
 46. Oct 15, 03         2,715,880.79                0.00      7.2860
- --------------------------------------------------------------------
 47. Nov 15, 03         2,715,880.79                0.00      7.2860
- --------------------------------------------------------------------
 48. Dec 15, 03         2,715,880.79                0.00      7.2860
- --------------------------------------------------------------------
 49. Jan 15, 04         2,715,880.79                0.00      7.2860
- --------------------------------------------------------------------
 50. Feb 15, 04         2,715,880.79                0.00      7.2860
- --------------------------------------------------------------------
 51. Mar 15, 04         2,715,880.79                0.00      7.2860
- --------------------------------------------------------------------
 52. Apr 15, 04         2,715,880.79                0.00      7.2860
- --------------------------------------------------------------------
 53. May 15, 04         2,715,880.79                0.00      7.2860
- --------------------------------------------------------------------
 54. Jun 15, 04         2,715,880.79                0.00      7.2860
- --------------------------------------------------------------------
 55. Jul 15, 04         2,715,880.79                0.00      7.2860
- --------------------------------------------------------------------
 56. Aug 15, 04         2,715,880.79                0.00      7.2860
- --------------------------------------------------------------------
 57. Sep 15, 04         2,715,880.79                0.00      7.2860
- --------------------------------------------------------------------
 58. Oct 15, 04         2,715,880.79                0.00      7.2860
- --------------------------------------------------------------------
 59. Nov 15, 04         2,715,880.79                0.00      7.2860
- --------------------------------------------------------------------
 60. Dec 15, 04         2,715,880.79                0.00      7.2860
- --------------------------------------------------------------------
 61. Jan 15, 05         2,715,880.79                0.00      7.2860
- --------------------------------------------------------------------
 62. Feb 15, 05         2,715,880.79                0.00      7.2860
- --------------------------------------------------------------------
 63. Mar 15, 05         2,715,880.79                0.00      7.2860
- --------------------------------------------------------------------
 64. Apr 15, 05         2,715,880.79                0.00      7.2860
- --------------------------------------------------------------------
 65. May 15, 05         2,715,880.79                0.00      7.2860
- --------------------------------------------------------------------
 66. Jun 15, 05         2,715,880.79                0.00      7.2860
- --------------------------------------------------------------------
 67. Jul 15, 05         2,715,880.79                0.00      7.2860
- --------------------------------------------------------------------
 68. Aug 15, 05         2,715,880.79                0.00      7.2860
- --------------------------------------------------------------------
 69. Sep 15, 05         2,715,880.79                0.00      7.2860
- --------------------------------------------------------------------
 70. Oct 15, 05         2,715,880.79                0.00      7.2860
- --------------------------------------------------------------------
 71. Nov 15, 05         2,715,880.79                0.00      7.2860
- --------------------------------------------------------------------
</TABLE>


                 Generated by Intex Trader 12/13/1999 12:28 PM
 Information provided herein is believed by INTEX to be accurate; however INTEX
                           cannot guarantee accuracy.
<PAGE>

- --------------------------------------------------------------------------------
Investors should read the Underwriters' Statement which accompanies these
Computational Materials.
Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                                <C>         <C>                 <C>               <C>                       <C>              <C>
 72. Dec 15, 05                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 73. Jan 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 74. Feb 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 75. Mar 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 76. Apr 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 77. May 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 78. Jun 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 79. Jul 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 80. Aug 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 81. Sep 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 82. Oct 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 83. Nov 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 84. Dec 15, 06                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 85. Jan 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 86. Feb 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 87. Mar 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 88. Apr 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 89. May 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 90. Jun 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 91. Jul 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 92. Aug 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 93. Sep 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 94. Oct 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 95. Nov 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 96. Dec 15, 07                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 97. Jan 15, 08                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 98. Feb 15, 08                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
 99. Mar 15, 08                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
100. Apr 15, 08                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
101. May 15, 08                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------

<CAPTION>
- ----------------------------------------------------------------
<S>                 <C>                         <C>       <C>
 72. Dec 15, 05     2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------
 73. Jan 15, 06     2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------
 74. Feb 15, 06     2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------
 75. Mar 15, 06     2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------
 76. Apr 15, 06     2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------
 77. May 15, 06     2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------
 78. Jun 15, 06     2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------
 79. Jul 15, 06     2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------
 80. Aug 15, 06     2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------
 81. Sep 15, 06     2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------
 82. Oct 15, 06     2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------
 83. Nov 15, 06     2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------
 84. Dec 15, 06     2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------
 85. Jan 15, 07     2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------
 86. Feb 15, 07     2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------
 87. Mar 15, 07     2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------
 88. Apr 15, 07     2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------
 89. May 15, 07     2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------
 90. Jun 15, 07     2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------
 91. Jul 15, 07     2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------
 92. Aug 15, 07     2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------
 93. Sep 15, 07     2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------
 94. Oct 15, 07     2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------
 95. Nov 15, 07     2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------
 96. Dec 15, 07     2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------
 97. Jan 15, 08     2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------
 98. Feb 15, 08     2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------
 99. Mar 15, 08     2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------
100. Apr 15, 08     2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------
101. May 15, 08     2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------
</TABLE>


                 Generated by Intex Trader 12/13/1999 12:28 PM
 Information provided herein is believed by INTEX to be accurate; however INTEX
                           cannot guarantee accuracy.
<PAGE>

- --------------------------------------------------------------------------------
Investors should read the Underwriters' Statement which accompanies these
Computational Materials.
Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                        <C>                 <C>                <C>                <C>                       <C>              <C>
102. Jun 15, 08                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
103. Jul 15, 08                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
104. Aug 15, 08                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
105. Sep 15, 08                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
106. Oct 15, 08                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
107. Nov 15, 08                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
108. Dec 15, 08                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
109. Jan 15, 09                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
110. Feb 15, 09                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
111. Mar 15, 09                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
112. Apr 15, 09                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
113. May 15, 09                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
114. Jun 15, 09                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
115. Jul 15, 09                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
116. Aug 15, 09                    0.00        2,715,880.79        2,715,880.79      447,304,000.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
117. Sep 15, 09            9,834,894.60        2,715,880.79       12,550,775.39      437,469,105.40            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
118. Oct 15, 09            1,019,840.40        2,656,166.58        3,676,006.99      436,449,265.00            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
119. Nov 15, 09              891,942.86        2,649,974.45        3,541,917.31      435,557,322.14            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
120. Dec 15, 09            1,395,945.01        2,644,558.87        4,040,503.88      434,161,377.13            0.00             0.00
- ------------------------------------------------------------------------------------------------------------------------------------
121. Jan 15, 10               905428.14          2636083.16          3541511.31           433255949               0                0
- ------------------------------------------------------------------------------------------------------------------------------------
122. Feb 15, 10               911772.46           2630585.7          3542358.16         432344176.5               0                0
- ------------------------------------------------------------------------------------------------------------------------------------
123. Mar 15, 10              1320086.63          2625049.73          3945136.36         431024089.9               0                0
- ------------------------------------------------------------------------------------------------------------------------------------
124. Apr 15, 10                927407.9           2617034.6           3544442.5           430096682               0                0
- ------------------------------------------------------------------------------------------------------------------------------------
125. May 15, 10              1067377.44          2611403.69          3678781.13         429029304.6               0                0
- ------------------------------------------------------------------------------------------------------------------------------------
126. Jun 15, 10              3877339.41          2604922.93          6482262.33         425151965.2               0                0
- ------------------------------------------------------------------------------------------------------------------------------------
127. Jul 15, 10              1076464.77          2581381.02          3657845.78         424075500.4               0                0
- ------------------------------------------------------------------------------------------------------------------------------------
128. Aug 15, 10               950985.54          2574845.08          3525830.62         423124514.8               0                0
- ------------------------------------------------------------------------------------------------------------------------------------
129. Sep 15, 10               957649.04          2569071.01          3526720.06         422166865.8               0                0
- ------------------------------------------------------------------------------------------------------------------------------------
130. Oct 15, 10              1096708.01          2563256.49           3659964.5         421070157.8               0                0
- ------------------------------------------------------------------------------------------------------------------------------------
131. Nov 15, 10              3899678.04          2556597.64          6456275.69         417170479.7               0                0
- ------------------------------------------------------------------------------------------------------------------------------------

<CAPTION>
- -------------------------------------------------------------------
<S>                    <C>                         <C>       <C>
102. Jun 15, 08        2,715,880.79                0.00      7.2860
- -------------------------------------------------------------------
103. Jul 15, 08        2,715,880.79                0.00      7.2860
- -------------------------------------------------------------------
104. Aug 15, 08        2,715,880.79                0.00      7.2860
- -------------------------------------------------------------------
105. Sep 15, 08        2,715,880.79                0.00      7.2860
- -------------------------------------------------------------------
106. Oct 15, 08        2,715,880.79                0.00      7.2860
- -------------------------------------------------------------------
107. Nov 15, 08        2,715,880.79                0.00      7.2860
- -------------------------------------------------------------------
108. Dec 15, 08        2,715,880.79                0.00      7.2860
- -------------------------------------------------------------------
109. Jan 15, 09        2,715,880.79                0.00      7.2860
- -------------------------------------------------------------------
110. Feb 15, 09        2,715,880.79                0.00      7.2860
- -------------------------------------------------------------------
111. Mar 15, 09        2,715,880.79                0.00      7.2860
- -------------------------------------------------------------------
112. Apr 15, 09        2,715,880.79                0.00      7.2860
- -------------------------------------------------------------------
113. May 15, 09        2,715,880.79                0.00      7.2860
- -------------------------------------------------------------------
114. Jun 15, 09        2,715,880.79                0.00      7.2860
- -------------------------------------------------------------------
115. Jul 15, 09        2,715,880.79                0.00      7.2860
- -------------------------------------------------------------------
116. Aug 15, 09        2,715,880.79                0.00      7.2860
- -------------------------------------------------------------------
117. Sep 15, 09        2,715,880.79                0.00      7.2860
- -------------------------------------------------------------------
118. Oct 15, 09        2,656,166.58                0.00      7.2860
- -------------------------------------------------------------------
119. Nov 15, 09        2,649,974.45                0.00      7.2860
- -------------------------------------------------------------------
120. Dec 15, 09        2,644,558.87                0.00      7.2860
- -------------------------------------------------------------------
121. Jan 15, 10          2636083.16                   0       7.286
- -------------------------------------------------------------------
122. Feb 15, 10           2630585.7                   0       7.286
- -------------------------------------------------------------------
123. Mar 15, 10          2625049.73                   0       7.286
- -------------------------------------------------------------------
124. Apr 15, 10           2617034.6                   0       7.286
- -------------------------------------------------------------------
125. May 15, 10          2611403.69                   0       7.286
- -------------------------------------------------------------------
126. Jun 15, 10          2604922.93                   0       7.286
- -------------------------------------------------------------------
127. Jul 15, 10          2581381.02                   0       7.286
- -------------------------------------------------------------------
128. Aug 15, 10          2574845.08                   0       7.286
- -------------------------------------------------------------------
129. Sep 15, 10          2569071.01                   0       7.286
- -------------------------------------------------------------------
130. Oct 15, 10          2563256.49                   0       7.286
- -------------------------------------------------------------------
131. Nov 15, 10          2556597.64                   0       7.286
- -------------------------------------------------------------------
</TABLE>


                 Generated by Intex Trader 12/13/1999 12:28 PM
 Information provided herein is believed by INTEX to be accurate; however INTEX
                           cannot guarantee accuracy.
<PAGE>

- --------------------------------------------------------------------------------
Investors should read the Underwriters' Statement which accompanies these
Computational Materials.
Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
- -----------------------------------------------------------------------------------------------------------------------------------
<S>                         <C>                  <C>                <C>                 <C>                       <C>          <C>
132. Dec 15, 10               2652520.6           2532920.1           5185440.7         414517959.1               0            0
- -----------------------------------------------------------------------------------------------------------------------------------
133. Jan 15, 11               977086.76          2516814.88          3493901.64         413540872.4               0            0
- -----------------------------------------------------------------------------------------------------------------------------------
134. Feb 15, 11                983936.9          2510882.33          3494819.23         412556935.5               0            0
- -----------------------------------------------------------------------------------------------------------------------------------
135. Mar 15, 11              1381863.67          2504908.19          3886771.86         411175071.8               0            0
- -----------------------------------------------------------------------------------------------------------------------------------
136. Apr 15, 11              1000519.71          2496517.98          3497037.69         410174552.1               0            0
- -----------------------------------------------------------------------------------------------------------------------------------
137. May 15, 11              1137340.42          2490443.16          3627783.58         409037211.7               0            0
- -----------------------------------------------------------------------------------------------------------------------------------
138. Jun 15, 11             30924167.69           2483537.6         33407705.29           378113044               0            0
- -----------------------------------------------------------------------------------------------------------------------------------
139. Jul 15, 11             31563541.33          2295776.37         33859317.69         346549502.7               0            0
- -----------------------------------------------------------------------------------------------------------------------------------
140. Aug 15, 11             27603477.02          2104133.06         29707610.08         318946025.6               0            0
- -----------------------------------------------------------------------------------------------------------------------------------
141. Sep 15, 11             141305550.5          1936533.95         143242084.5         177640475.1               0            0
- -----------------------------------------------------------------------------------------------------------------------------------
142. Oct 15, 11             148943255.3          1078573.75         150021829.1         28697219.76               0            0
- -----------------------------------------------------------------------------------------------------------------------------------
143. Nov 15, 11             28697219.76           174239.95         28871459.71                   0               0            0
- -----------------------------------------------------------------------------------------------------------------------------------

<CAPTION>
- --------------------------------------------------------------------
<S>                        <C>                         <C>     <C>
132. Dec 15, 10            2532920.1                   0       7.286
- --------------------------------------------------------------------
133. Jan 15, 11           2516814.88                   0       7.286
- --------------------------------------------------------------------
134. Feb 15, 11           2510882.33                   0       7.286
- --------------------------------------------------------------------
135. Mar 15, 11           2504908.19                   0       7.286
- --------------------------------------------------------------------
136. Apr 15, 11           2496517.98                   0       7.286
- --------------------------------------------------------------------
137. May 15, 11           2490443.16                   0       7.286
- --------------------------------------------------------------------
138. Jun 15, 11            2483537.6                   0       7.286
- --------------------------------------------------------------------
139. Jul 15, 11           2295776.37                   0       7.286
- --------------------------------------------------------------------
140. Aug 15, 11           2104133.06                   0       7.286
- --------------------------------------------------------------------
141. Sep 15, 11           1936533.95                   0       7.286
- --------------------------------------------------------------------
142. Oct 15, 11           1078573.75                   0       7.286
- --------------------------------------------------------------------
143. Nov 15, 11            174239.95                   0       7.286
- --------------------------------------------------------------------
</TABLE>


                 Generated by Intex Trader 12/13/1999 12:28 PM
 Information provided herein is believed by INTEX to be accurate; however INTEX
                           cannot guarantee accuracy.
<PAGE>

- --------------------------------------------------------------------------------
Investors should read the Underwriters' Statement which accompanies these
Computational Materials.
Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.
- --------------------------------------------------------------------------------

- --------------------------------------------------------------------------------
FUNB99C4_RED, CLASS AAA_2
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------
<S>                 <C>          <C>                 <C>                 <C>                 <C>
CUSIP                            Face                $447,304,000.00     Settle at Pricing
- ------------------------------------------------------------------------------------------------------
Coupon              7.286        Original Balance    $447,304,000.00     Accrual begins      12/1/1999
- ------------------------------------------------------------------------------------------------------
Delay               14           Current Balance     $447,304,000.00     Factor Date         N/A
- ------------------------------------------------------------------------------------------------------
Stated Maturity     N/A          Factor              1
- ------------------------------------------------------------------------------------------------------
Type                SEN FIX      WAL 9.73353 yrs
- ------------------------------------------------------------------------------------------------------
YIELD CURVE:  Spread off Interpolated node
- ------------------------------------------------------------------------------------------------------
3MO=5.68, 6MO=5.68, 1YR=5.68, 2YR=5.942, 5YR=5.975, 10YR=6.075, 30YR=6.175
- ------------------------------------------------------------------------------------------------------
</TABLE>

- --------------------------------------------------------------------------------
Prepay: At 0 CPR    No prepays: During any YM
- --------------------------------------------------------------------------------
Lockout and penalties: Include penalty   Default: At 0 CDR    Loss Severity: 35%
- --------------------------------------------------------------------------------
Servicer Advances: 100% of P & I     Recovery Lag: 12 mos
- --------------------------------------------------------------------------------
Extension, if balloon: None     Increase Coupon:      Pay Exten Princ:
- --------------------------------------------------------------------------------
Optional Redemption:
- --------------------------------------------------------------------------------

<TABLE>
<CAPTION>
- ------------------------------------------------------------------------------------------------------------------------
Period / Date         Principal           Interest            Cash Flow            Balance             Prepay Penalty
- ------------------------------------------------------------------------------------------------------------------------
<S>                      <C>                 <C>                 <C>                 <C>                         <C>
                         447,304,000.00      317,402,316.37      764,706,316.37                                  0.00
- ------------------------------------------------------------------------------------------------------------------------

- ------------------------------------------------------------------------------------------------------------------------
  0. Dec 17, 99                    0.00                0.00                0.00      447,304,000.00              0.00
- ------------------------------------------------------------------------------------------------------------------------
  1. Jan 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
- ------------------------------------------------------------------------------------------------------------------------
  2. Feb 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
- ------------------------------------------------------------------------------------------------------------------------
  3. Mar 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
- ------------------------------------------------------------------------------------------------------------------------
  4. Apr 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
- ------------------------------------------------------------------------------------------------------------------------
  5. May 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
- ------------------------------------------------------------------------------------------------------------------------
  6. Jun 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
- ------------------------------------------------------------------------------------------------------------------------
  7. Jul 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
- ------------------------------------------------------------------------------------------------------------------------
  8. Aug 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
- ------------------------------------------------------------------------------------------------------------------------
  9. Sep 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
- ------------------------------------------------------------------------------------------------------------------------
 10. Oct 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
- ------------------------------------------------------------------------------------------------------------------------
 11. Nov 15, 00                    0.00        2,715,880.79        2,715,880.79      447,304,000.00              0.00
- ------------------------------------------------------------------------------------------------------------------------

<CAPTION>
- ----------------------------------------------------------------------------------------
Period / Date        Princ Writedown    Accrued Interest  Interest Shortfall      Coupon
- ----------------------------------------------------------------------------------------
<S>                             <C>       <C>                           <C>       <C>
                                0.00      317,402,316.37                0.00
- ----------------------------------------------------------------------------------------

- ----------------------------------------------------------------------------------------
  0. Dec 17, 99                 0.00                0.00                0.00      0.0000
- ----------------------------------------------------------------------------------------
  1. Jan 15, 00                 0.00        2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------------------------------
  2. Feb 15, 00                 0.00        2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------------------------------
  3. Mar 15, 00                 0.00        2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------------------------------
  4. Apr 15, 00                 0.00        2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------------------------------
  5. May 15, 00                 0.00        2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------------------------------
  6. Jun 15, 00                 0.00        2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------------------------------
  7. Jul 15, 00                 0.00        2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------------------------------
  8. Aug 15, 00                 0.00        2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------------------------------
  9. Sep 15, 00                 0.00        2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------------------------------
 10. Oct 15, 00                 0.00        2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------------------------------
 11. Nov 15, 00                 0.00        2,715,880.79                0.00      7.2860
- ----------------------------------------------------------------------------------------
</TABLE>


                 Generated by Intex Trader 12/13/1999 12:28 PM
 Information provided herein is believed by INTEX to be accurate; however INTEX
                           cannot guarantee accuracy.


<PAGE>

- --------------------------------------------------------------------------------
Investors should read the Underwriters' Statement which accompanies these
Computational Materials.
Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.
- --------------------------------------------------------------------------------

<TABLE>
<S>                          <C>      <C>              <C>            <C>                       <C>              <C>
 12. Dec 15, 00              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 13. Jan 15, 01              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 14. Feb 15, 01              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 15. Mar 15, 01              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 16. Apr 15, 01              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 17. May 15, 01              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 18. Jun 15, 01              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 19. Jul 15, 01              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 20. Aug 15, 01              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 21. Sep 15, 01              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 22. Oct 15, 01              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 23. Nov 15, 01              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 24. Dec 15, 01              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 25. Jan 15, 02              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 26. Feb 15, 02              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 27. Mar 15, 02              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 28. Apr 15, 02              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 29. May 15, 02              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 30. Jun 15, 02              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 31. Jul 15, 02              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 32. Aug 15, 02              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 33. Sep 15, 02              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 34. Oct 15, 02              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 35. Nov 15, 02              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 36. Dec 15, 02              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 37. Jan 15, 03              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 38. Feb 15, 03              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 39. Mar 15, 03              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 40. Apr 15, 03              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 41. May 15, 03              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00

<CAPTION>
<S>                       <C>                      <C>      <C>
 12. Dec 15, 00           2,715,880.79             0.00     7.2860
 13. Jan 15, 01           2,715,880.79             0.00     7.2860
 14. Feb 15, 01           2,715,880.79             0.00     7.2860
 15. Mar 15, 01           2,715,880.79             0.00     7.2860
 16. Apr 15, 01           2,715,880.79             0.00     7.2860
 17. May 15, 01           2,715,880.79             0.00     7.2860
 18. Jun 15, 01           2,715,880.79             0.00     7.2860
 19. Jul 15, 01           2,715,880.79             0.00     7.2860
 20. Aug 15, 01           2,715,880.79             0.00     7.2860
 21. Sep 15, 01           2,715,880.79             0.00     7.2860
 22. Oct 15, 01           2,715,880.79             0.00     7.2860
 23. Nov 15, 01           2,715,880.79             0.00     7.2860
 24. Dec 15, 01           2,715,880.79             0.00     7.2860
 25. Jan 15, 02           2,715,880.79             0.00     7.2860
 26. Feb 15, 02           2,715,880.79             0.00     7.2860
 27. Mar 15, 02           2,715,880.79             0.00     7.2860
 28. Apr 15, 02           2,715,880.79             0.00     7.2860
 29. May 15, 02           2,715,880.79             0.00     7.2860
 30. Jun 15, 02           2,715,880.79             0.00     7.2860
 31. Jul 15, 02           2,715,880.79             0.00     7.2860
 32. Aug 15, 02           2,715,880.79             0.00     7.2860
 33. Sep 15, 02           2,715,880.79             0.00     7.2860
 34. Oct 15, 02           2,715,880.79             0.00     7.2860
 35. Nov 15, 02           2,715,880.79             0.00     7.2860
 36. Dec 15, 02           2,715,880.79             0.00     7.2860
 37. Jan 15, 03           2,715,880.79             0.00     7.2860
 38. Feb 15, 03           2,715,880.79             0.00     7.2860
 39. Mar 15, 03           2,715,880.79             0.00     7.2860
 40. Apr 15, 03           2,715,880.79             0.00     7.2860
 41. May 15, 03           2,715,880.79             0.00     7.2860
</TABLE>

<PAGE>

- --------------------------------------------------------------------------------
Investors should read the Underwriters' Statement which accompanies these
Computational Materials.
Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.
- --------------------------------------------------------------------------------

<TABLE>
<S>                          <C>      <C>              <C>            <C>                       <C>              <C>
 42. Jun 15, 03              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 43. Jul 15, 03              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 44. Aug 15, 03              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 45. Sep 15, 03              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 46. Oct 15, 03              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 47. Nov 15, 03              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 48. Dec 15, 03              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 49. Jan 15, 04              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 50. Feb 15, 04              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 51. Mar 15, 04              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 52. Apr 15, 04              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 53. May 15, 04              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 54. Jun 15, 04              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 55. Jul 15, 04              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 56. Aug 15, 04              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 57. Sep 15, 04              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 58. Oct 15, 04              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 59. Nov 15, 04              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 60. Dec 15, 04              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 61. Jan 15, 05              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 62. Feb 15, 05              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 63. Mar 15, 05              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 64. Apr 15, 05              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 65. May 15, 05              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 66. Jun 15, 05              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 67. Jul 15, 05              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 68. Aug 15, 05              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 69. Sep 15, 05              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 70. Oct 15, 05              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 71. Nov 15, 05              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00

<CAPTION>
<S>                      <C>                      <C>      <C>
 42. Jun 15, 03          2,715,880.79             0.00     7.2860
 43. Jul 15, 03          2,715,880.79             0.00     7.2860
 44. Aug 15, 03          2,715,880.79             0.00     7.2860
 45. Sep 15, 03          2,715,880.79             0.00     7.2860
 46. Oct 15, 03          2,715,880.79             0.00     7.2860
 47. Nov 15, 03          2,715,880.79             0.00     7.2860
 48. Dec 15, 03          2,715,880.79             0.00     7.2860
 49. Jan 15, 04          2,715,880.79             0.00     7.2860
 50. Feb 15, 04          2,715,880.79             0.00     7.2860
 51. Mar 15, 04          2,715,880.79             0.00     7.2860
 52. Apr 15, 04          2,715,880.79             0.00     7.2860
 53. May 15, 04          2,715,880.79             0.00     7.2860
 54. Jun 15, 04          2,715,880.79             0.00     7.2860
 55. Jul 15, 04          2,715,880.79             0.00     7.2860
 56. Aug 15, 04          2,715,880.79             0.00     7.2860
 57. Sep 15, 04          2,715,880.79             0.00     7.2860
 58. Oct 15, 04          2,715,880.79             0.00     7.2860
 59. Nov 15, 04          2,715,880.79             0.00     7.2860
 60. Dec 15, 04          2,715,880.79             0.00     7.2860
 61. Jan 15, 05          2,715,880.79             0.00     7.2860
 62. Feb 15, 05          2,715,880.79             0.00     7.2860
 63. Mar 15, 05          2,715,880.79             0.00     7.2860
 64. Apr 15, 05          2,715,880.79             0.00     7.2860
 65. May 15, 05          2,715,880.79             0.00     7.2860
 66. Jun 15, 05          2,715,880.79             0.00     7.2860
 67. Jul 15, 05          2,715,880.79             0.00     7.2860
 68. Aug 15, 05          2,715,880.79             0.00     7.2860
 69. Sep 15, 05          2,715,880.79             0.00     7.2860
 70. Oct 15, 05          2,715,880.79             0.00     7.2860
 71. Nov 15, 05          2,715,880.79             0.00     7.2860
</TABLE>

<PAGE>

- --------------------------------------------------------------------------------
Investors should read the Underwriters' Statement which accompanies these
Computational Materials.
Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.
- --------------------------------------------------------------------------------

<TABLE>
<S>                          <C>      <C>              <C>            <C>                       <C>              <C>
 72. Dec 15, 05              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 73. Jan 15, 06              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 74. Feb 15, 06              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 75. Mar 15, 06              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 76. Apr 15, 06              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 77. May 15, 06              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 78. Jun 15, 06              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 79. Jul 15, 06              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 80. Aug 15, 06              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 81. Sep 15, 06              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 82. Oct 15, 06              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 83. Nov 15, 06              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 84. Dec 15, 06              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 85. Jan 15, 07              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 86. Feb 15, 07              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 87. Mar 15, 07              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 88. Apr 15, 07              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 89. May 15, 07              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 90. Jun 15, 07              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 91. Jul 15, 07              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 92. Aug 15, 07              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 93. Sep 15, 07              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 94. Oct 15, 07              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 95. Nov 15, 07              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 96. Dec 15, 07              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 97. Jan 15, 08              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 98. Feb 15, 08              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
 99. Mar 15, 08              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
100. Apr 15, 08              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
101. May 15, 08              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00

<CAPTION>
<S>                      <C>                      <C>      <C>
 72. Dec 15, 05          2,715,880.79             0.00     7.2860
 73. Jan 15, 06          2,715,880.79             0.00     7.2860
 74. Feb 15, 06          2,715,880.79             0.00     7.2860
 75. Mar 15, 06          2,715,880.79             0.00     7.2860
 76. Apr 15, 06          2,715,880.79             0.00     7.2860
 77. May 15, 06          2,715,880.79             0.00     7.2860
 78. Jun 15, 06          2,715,880.79             0.00     7.2860
 79. Jul 15, 06          2,715,880.79             0.00     7.2860
 80. Aug 15, 06          2,715,880.79             0.00     7.2860
 81. Sep 15, 06          2,715,880.79             0.00     7.2860
 82. Oct 15, 06          2,715,880.79             0.00     7.2860
 83. Nov 15, 06          2,715,880.79             0.00     7.2860
 84. Dec 15, 06          2,715,880.79             0.00     7.2860
 85. Jan 15, 07          2,715,880.79             0.00     7.2860
 86. Feb 15, 07          2,715,880.79             0.00     7.2860
 87. Mar 15, 07          2,715,880.79             0.00     7.2860
 88. Apr 15, 07          2,715,880.79             0.00     7.2860
 89. May 15, 07          2,715,880.79             0.00     7.2860
 90. Jun 15, 07          2,715,880.79             0.00     7.2860
 91. Jul 15, 07          2,715,880.79             0.00     7.2860
 92. Aug 15, 07          2,715,880.79             0.00     7.2860
 93. Sep 15, 07          2,715,880.79             0.00     7.2860
 94. Oct 15, 07          2,715,880.79             0.00     7.2860
 95. Nov 15, 07          2,715,880.79             0.00     7.2860
 96. Dec 15, 07          2,715,880.79             0.00     7.2860
 97. Jan 15, 08          2,715,880.79             0.00     7.2860
 98. Feb 15, 08          2,715,880.79             0.00     7.2860
 99. Mar 15, 08          2,715,880.79             0.00     7.2860
100. Apr 15, 08          2,715,880.79             0.00     7.2860
101. May 15, 08          2,715,880.79             0.00     7.2860
</TABLE>

<PAGE>

- --------------------------------------------------------------------------------
Investors should read the Underwriters' Statement which accompanies these
Computational Materials.
Prospective investors are advised to carefully read, and should rely solely on,
the final prospectus and prospectus supplement (collectively, the "Final
Prospectus") relating to the certificates referred to herein (the "Offered
Certificates") in making their investment decision. These Computational
Materials have been based upon the assumptions described above, which most
likely will not represent the actual experience of the Mortgage Pool in the
future. No representation is made herein as to the actual rate or timing of
principal payments or prepayments on any of the underlying Mortgage Loans in the
Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.
- --------------------------------------------------------------------------------

<TABLE>
<S>                          <C>      <C>              <C>            <C>                       <C>              <C>
102. Jun 15, 08              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
103. Jul 15, 08              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
104. Aug 15, 08              0.00     2,715,880.79     2,715,880.79   447,304,000.00            0.00             0.00
105. Sep 15, 08        275,651.56     2,715,880.79     2,991,532.35   447,028,348.44            0.00             0.00
106. Oct 15, 08        940,874.86     2,714,207.12     3,655,081.98   446,087,473.57            0.00             0.00
107. Nov 15, 08      3,819,407.75     2,708,494.44     6,527,902.19   442,268,065.83            0.00             0.00
108. Dec 15, 08      2,565,776.66     2,685,304.27     5,251,080.94   439,702,289.16            0.00             0.00
109. Jan 15, 09        814,218.93     2,669,725.73     3,483,944.66   438,888,070.24            0.00             0.00
110. Feb 15, 09        819,925.43     2,664,782.07     3,484,707.50   438,068,144.80            0.00             0.00
111. Mar 15, 09      1,232,622.78     2,659,803.75     3,892,426.53   436,835,522.02            0.00             0.00
112. Apr 15, 09        834,308.61     2,652,319.68     3,486,628.29   436,001,213.41            0.00             0.00
113. May 15, 09        975,340.76     2,647,254.03     3,622,594.79   435,025,872.65            0.00             0.00
114. Jun 15, 09     32,850,510.39     2,641,332.09    35,491,842.48   402,175,362.26            0.00             0.00
115. Jul 15, 09     32,500,393.09     2,441,874.74    34,942,267.83   369,674,969.18            0.00             0.00
116. Aug 15, 09     28,564,634.89     2,244,543.19    30,809,178.08   341,110,334.28            0.00             0.00
117. Sep 15, 09    146,651,307.20     2,071,108.25   148,722,415.44   194,459,027.09            0.00             0.00
118. Oct 15, 09    152,725,179.51     1,180,690.39   153,905,869.91    41,733,847.57            0.00             0.00
119. Nov 15, 09     41,733,847.57       253,394.01    41,987,241.59             0.00            0.00             0.00

<CAPTION>
<S>                <C>                      <C>      <C>
102. Jun 15, 08    2,715,880.79             0.00     7.2860
103. Jul 15, 08    2,715,880.79             0.00     7.2860
104. Aug 15, 08    2,715,880.79             0.00     7.2860
105. Sep 15, 08    2,715,880.79             0.00     7.2860
106. Oct 15, 08    2,714,207.12             0.00     7.2860
107. Nov 15, 08    2,708,494.44             0.00     7.2860
108. Dec 15, 08    2,685,304.27             0.00     7.2860
109. Jan 15, 09    2,669,725.73             0.00     7.2860
110. Feb 15, 09    2,664,782.07             0.00     7.2860
111. Mar 15, 09    2,659,803.75             0.00     7.2860
112. Apr 15, 09    2,652,319.68             0.00     7.2860
113. May 15, 09    2,647,254.03             0.00     7.2860
114. Jun 15, 09    2,641,332.09             0.00     7.2860
115. Jul 15, 09    2,441,874.74             0.00     7.2860
116. Aug 15, 09    2,244,543.19             0.00     7.2860
117. Sep 15, 09    2,071,108.25             0.00     7.2860
118. Oct 15, 09    1,180,690.39             0.00     7.2860
119. Nov 15, 09      253,394.01             0.00     7.2860
</TABLE>



<PAGE>


<TABLE>
<CAPTION>

FUNB99C4_BLK, CLASS AAA_1--PRICE/YIELD

- ----------------------------------------------------------------------------------------------------------------------------------
<S>                               <C>          <C>                    <C>                <C>
CUSIP                                          Face                   $206,000,000.00    Settle at Pricing
Coupon                            7.184        Original Balance       $206,000,000.00    Accrual begins             12/1/99
Delay                              14          Current Balance        $206,000,000.00    Factor Date                  N/A
Stated Maturity                    N/A         Factor                        1           -----------------------------------------
Type                             SEN FIX       ------------------------------------------
- -----------------------------------------------

YIELD CURVE:  Spread off interpolated node
3MO=5.68, 6MO=5.68, 1YR=5.68, 2YR=6.04, 5YR=6.097, 10YR=6.196, 30YR=6.290

- ------------------------------------------------------------------------------------------------------------------------------------
     PRICE              0 CPR, AFTER YM   15 CPR, AFTER      25 CPR, AFTER       50 CPR, AFTER     75 CPR, AFTER     100 CPR, AFTER
                             Yield              YM                 YM                  YM                YM                YM
- ------------------------------------------------------------------------------------------------------------------------------------
     <S>                    <C>               <C>                <C>                 <C>               <C>               <C>
     99.999                 7.2269            7.2269             7.2268              7.2268            7.2267            7.2257
    100.0615                7.2122            7.2122             7.2122              7.2121            7.2120            7.2108
    100.124                 7.1976            7.1975             7.1975              7.1974            7.1973            7.1958
    100.1865                7.1829            7.1829             7.1829              7.1827            7.1826            7.1809
    100.249                 7.1683            7.1683             7.1682              7.1681            7.1679            7.1660
    100.3115                7.1537            7.1536             7.1536              7.1534            7.1532            7.1512
    100.374                 7.1391            7.1390             7.1390              7.1388            7.1386            7.1363
    100.4365                7.1245            7.1244             7.1244              7.1242            7.1239            7.1214
    100.499                 7.1099            7.1099             7.1098              7.1096            7.1093            7.1066
    100.5615                7.0954            7.0953             7.0952              7.0950            7.0947            7.0917
    100.624                 7.0808            7.0807             7.0807              7.0804            7.0801            7.0769
    100.6865                7.0663            7.0662             7.0661              7.0659            7.0655            7.0621
    100.749                 7.0518            7.0517             7.0516              7.0513            7.0509            7.0473
    100.8115                7.0373            7.0371             7.0370              7.0368            7.0364            7.0325
    100.874                 7.0228            7.0226             7.0225              7.0222            7.0218            7.0178
    100.9365                7.0083            7.0081             7.0080              7.0077            7.0073            7.0030
    100.999                 6.9938            6.9936             6.9935              6.9932            6.9927            6.9883
- ------------------------------------------------------------------------------------------------------------------------------------

- ------------------------------------------------------------------------------------------------------------------------------------
Spread @ Center Price         101               101                101                100                100               100
                  WAL       5.40043           5.39724            5.39485            5.38758            5.37653           5.27959
             Mod Durn        4.255             4.253              4.252              4.247              4.240             4.178
        Mod Convexity        0.248             0.248              0.248              0.247              0.246             0.239
     Principal Window   Jan00 to Sep08    Jan00 to Sep08     Jan00 to Sep08      Jan00 to Sep08    Jan00 to Sep08    Jan00 to Sep08
        Maturity #mos         105               105                105                105                105               105
     Accrued Interest     657,735.11        657,735.11         657,735.11          657,735.11        657,735.11        657,735.11
    Total Collat Loss    0.00 (0.00%)      0.00 (0.00%)       0.00 (0.00%)        0.00 (0.00%)      0.00 (0.00%)      0.00 (0.00%)

               Prepay      At 0 CPR          At 15 CPR          At 25 CPR          At 50 CPR          At 75 CPR        At 100 CPR
           No prepays    During any YM     During any YM      During any YM      During any YM      During any YM     During any YM
Lockout and penalties   Include penalty   Include penalty    Include penalty    Include penalty    Include penalty   Include penalty

Extension, if balloon        None              None               None                None              None              None
      Increase Coupon
      Pay Exten Princ

              Default      At 0 CDR          At 0 CDR           At 0 CDR            At 0 CDR          At 0 CDR          At 0 CDR
        Loss Severity          0                 0                  0                  0                  0                 0
    Servicer Advances    100% of P & I     100% of P & I      100% of P & I      100% of P & I      100% of P & I     100% of P & I
         Recovery Lag       12 mos            12 mos             12 mos              12 mos            12 mos            12 mos

  Optional Redemption

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

</TABLE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials Prospective Investors are advised to carefully read, and
should rely solely on, the final prospectus and prospectus supplement
(collectively, the "Final Prospectus") relating to the certificates referred to
herein (the "Offered Certificates") in making their investment decision. These
Computational Materials have been based upon the assumptions described above,
which most likely will not represent the actual experience of the Mortgage Pool
in the future. No representation is made herein as to the actual rate or timing
of principal payments or prepayments on any of the underlying Mortgage Loans in
the Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.


                 Generated by Intex Trader 12/14/1999 12:34 PM
 Information provided herein is believed by INTEX to be accurate; however INTEX
                           cannot guarantee accuracy.




<PAGE>


<TABLE>
<CAPTION>


FUNB99C4_BLK, CLASS AAA_2--PRICE/YIELD

- ----------------------------------------------------------------------------------------------------------------------------------
<S>                               <C>          <C>                    <C>                <C>
CUSIP                                          Face                   $447,232,000.00    Settle at Pricing
Coupon                            7.39         Original Balance       $447,232,000.00    Accrual begins             12/1/99
Delay                              14          Current Balance        $447,232,000.00    Factor Date                  N/A
Stated Maturity                    N/A         Factor                        1           -----------------------------------------
Type                             SEN FIX       -----------------------------------------
- ------------------------------------------

YIELD CURVE:  Spread off interpolated node
3MO=5.68, 6MO=5.68, 1YR=5.68, 2YR=6.04, 5YR=6.097, 10YR=6.196, 30YR=6.290

- ------------------------------------------------------------------------------------------------------------------------------------
     PRICE              0 CPR, AFTER YM     15 CPR, AFTER     25 CPR, AFTER     50 CPR, AFTER     75 CPR, AFTER     100 CPR, AFTER
                             Yield                YM               YM                 YM                YM                 YM
- ------------------------------------------------------------------------------------------------------------------------------------
     <S>                    <C>               <C>                <C>                 <C>               <C>               <C>
     99.9988                 7.4622            7.4621             7.4621              7.4621            7.4620            7.4616
    100.0613                7.4529            7.4529             7.4529              7.4528            7.4527            7.4522
    100.1238                7.4436            7.4436             7.4436              7.4435            7.4434            7.4428
    100.1863                7.4344            7.4344             7.4343              7.4343            7.4342            7.4334
    100.2488                7.4251            7.4251             7.4251              7.4250            7.4249            7.4240
    100.3113                7.4159            7.4159             7.4158              7.4157            7.4156            7.4146
    100.3738                7.4067            7.4066             7.4066              7.4065            7.4064            7.4053
    100.4363                7.3974            7.3974             7.3974              7.3973            7.3971            7.3959
    100.4988                7.3882            7.3882             7.3881              7.3880            7.3879            7.3866
    100.5613                7.3790            7.3790             7.3789              7.3788            7.3786            7.3772
    100.6238                7.3698            7.3698             7.3697              7.3696            7.3694            7.3679
    100.6863                7.3606            7.3606             7.3605              7.3604            7.3602            7.3586
    100.7488                7.3514            7.3514             7.3513              7.3512            7.3509            7.3493
    100.8113                7.3423            7.3422             7.3421              7.3420            7.3417            7.3399
    100.8738                7.3331            7.3330             7.3330              7.3328            7.3325            7.3306
    100.9363                7.3239            7.3239             7.3238              7.3236            7.3233            7.3213
    100.9988                7.3148            7.3147             7.3146              7.3144            7.3142            7.3121
- ------------------------------------------------------------------------------------------------------------------------------------

- ------------------------------------------------------------------------------------------------------------------------------------
Spread @ Center Price         120               120                120                120                120               120
                  WAL       9.73355           9.72714            9.72235            9.70762            9.68562           9.53373
             Mod Durn        6.729             6.726              6.724              6.717              6.707             6.634
        Mod Convexity        0.590             0.589              0.589              0.587              0.585             0.572
     Principal Window   Sep08 to Nov09    Sep08 to Nov09     Sep08 to Nov09      Sep08 to Nov09    Sep08 to Oct09    Sep08 to Sep09
        Maturity #mos         119               119                119                119                118               117

     Accrued Interest    1,468,908.66      1,468,908.66       1,468,908.66        1,468,908.66      1,468,908.66      1,468,908.66
    Total Collat Loss    0.00 (0.00%)      0.00 (0.00%)       0.00 (0.00%)        0.00 (0.00%)      0.00 (0.00%)      0.00 (0.00%)

               Prepay      At 0 CPR          At 15 CPR          At 25 CPR          At 50 CPR          At 75 CPR        At 100 CPR
           No prepays    During any YM     During any YM      During any YM      During any YM      During any YM     During any YM

Lockout and penalties   Include penalty   Include penalty    Include penalty    Include penalty    Include penalty   Include penalty

Extension, if balloon        None              None               None                None              None              None
      Increase Coupon
      Pay Exten Princ

              Default      At 0 CDR          At 0 CDR           At 0 CDR            At 0 CDR          At 0 CDR          At 0 CDR
        Loss Severity          0                 0                  0                  0                  0                 0
    Servicer Advances    100% of P & I     100% of P & I      100% of P & I      100% of P & I      100% of P & I     100% of P & I
         Recovery Lag       12 mos            12 mos             12 mos              12 mos            12 mos            12 mos

  Optional Redemption

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

</TABLE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials Prospective Investors are advised to carefully read, and
should rely solely on, the final prospectus and prospectus supplement
(collectively, the "Final Prospectus") relating to the certificates referred to
herein (the "Offered Certificates") in making their investment decision. These
Computational Materials have been based upon the assumptions described above,
which most likely will not represent the actual experience of the Mortgage Pool
in the future. No representation is made herein as to the actual rate or timing
of principal payments or prepayments on any of the underlying Mortgage Loans in
the Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.


                 Generated by Intex Trader 12/14/1999 12:34 PM
 Information provided herein is believed by INTEX to be accurate; however INTEX
                           cannot guarantee accuracy.



<PAGE>

<TABLE>
<CAPTION>

FUNB99C4_BLK, CLASS AAA_1--PRICE/YIELD

- ----------------------------------------------------------------------------------------------------------------------------------
<S>                               <C>          <C>                    <C>                <C>
CUSIP                                          Face                   $206,000,000.00    Settle at Pricing
Coupon                            7.184        Original Balance       $206,000,000.00    Accrual begins             12/1/99
Delay                              14          Current Balance        $206,000,000.00    Factor Date                  N/A
Stated Maturity                    N/A         Factor                        1           -----------------------------------------
Type                             SEN FIX       ------------------------------------------
- -----------------------------------------------

YIELD CURVE:  Spread off interpolated node
3MO=5.68, 6MO=5.68, 1YR=5.68, 2YR=6.04, 5YR=6.097, 10YR=6.196, 30YR=6.290

- ------------------------------------------------------------------------------------------------------------------------------------
 PRICE                 0 CPR              15 CPR               25 CPR                50 CPR              75 CPR              100 CPR
                       Yield
- ------------------------------------------------------------------------------------------------------------------------------------
<S>                   <C>                 <C>                  <C>                   <C>                <C>                  <C>
 99.999               7.2269              7.4143               7.4976                7.6251              7.6977              7.7919
100.0615              7.2122              7.3983               7.4810                7.6072              7.6791              7.7719
100.124               7.1976              7.3823               7.4644                7.5894              7.6604              7.7520
100.1865              7.1829              7.3664               7.4478                7.5716              7.6418              7.7321
100.249               7.1683              7.3505               7.4312                7.5538              7.6232              7.7122
100.3115              7.1537              7.3346               7.4147                7.5361              7.6047              7.6923
100.374               7.1391              7.3187               7.3981                7.5183              7.5861              7.6724
100.4365              7.1245              7.3028               7.3816                7.5006              7.5675              7.6526
100.499               7.1099              7.2869               7.3651                7.4829              7.5490              7.6327
100.5615              7.0954              7.2711               7.3485                7.4652              7.5305              7.6129
100.624               7.0808              7.2552               7.3321                7.4475              7.5120              7.5932
100.6865              7.0663              7.2394               7.3156                7.4298              7.4935              7.5734
100.749               7.0518              7.2236               7.2991                7.4122              7.4751              7.5536
100.8115              7.0373              7.2078               7.2827                7.3945              7.4566              7.5339
100.874               7.0228              7.1920               7.2662                7.3769              7.4382              7.5142
100.9365              7.0083              7.1762               7.2498                7.3593              7.4198              7.4945
100.999               6.9938              7.1605               7.2334                7.3417              7.4014              7.4749
- ------------------------------------------------------------------------------------------------------------------------------------

- ------------------------------------------------------------------------------------------------------------------------------------
Spread @ Center Price         101               119                127               140                147                 156
                  WAL       5.40043           4.90689            4.69659           4.36374            4.17344             3.90750
             Mod Durn        4.255             3.908              3.754             3.501              3.348               3.129
        Mod Convexity        0.248             0.213              0.199             0.177              0.167               0.153
     Principal Window   Jan00 to Sep08    Jan00 to Sep07     Jan00 to Sep07     Jan00 to Sep07    Jan00 to Aug07      Jan00 to Jul07
        Maturity #mos         105               93                 93                 93                92                  91
     Accrued Interest     657,735.11        657,735.11         657,735.11         657,735.11        657,735.11          657,735.11
    Total Collat Loss    0.00 (0.00%)      0.00 (0.00%)       0.00 (0.00%)       0.00 (0.00%)      0.00 (0.00%)        0.00 (0.00%)

               Prepay      At 0 CPR          At 15 CPR          At 25 CPR         At 50 CPR          At 75 CPR          At 100 CPR
           No prepays

Lockout and penalties   Include penalty   Include penalty    Include penalty   Include penalty    Include penalty    Include penalty

Extension, if balloon        None              None               None               None              None                None
      Increase Coupon
      Pay Exten Princ

              Default      At 0 CDR          At 0 CDR           At 0 CDR           At 0 CDR          At 0 CDR            At 0 CDR
        Loss Severity          0                 0                  0                 0                  0                   0
    Servicer Advances    100% of P & I     100% of P & I      100% of P & I     100% of P & I      100% of P & I       100% of P & I
         Recovery Lag       12 mos            12 mos             12 mos             12 mos            12 mos              12 mos

  Optional Redemption

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

</TABLE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials Prospective Investors are advised to carefully read, and
should rely solely on, the final prospectus and prospectus supplement
(collectively, the "Final Prospectus") relating to the certificates referred to
herein (the "Offered Certificates") in making their investment decision. These
Computational Materials have been based upon the assumptions described above,
which most likely will not represent the actual experience of the Mortgage Pool
in the future. No representation is made herein as to the actual rate or timing
of principal payments or prepayments on any of the underlying Mortgage Loans in
the Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.



                 Generated by Intex Trader 12/14/1999 12:34 PM
 Information provided herein is believed by INTEX to be accurate; however INTEX
                           cannot guarantee accuracy.


<PAGE>


<TABLE>
<CAPTION>


FUNB99C4_BLK, CLASS AAA_2--PRICE/YIELD

- ----------------------------------------------------------------------------------------------------------------------------------
<S>                               <C>          <C>                    <C>                <C>

CUSIP                                          Face                   $447,232,000.00    Settle at Pricing
Coupon                            7.39         Original Balance       $447,232,000.00    Accrual begins             12/1/99
Delay                              14          Current Balance        $447,232,000.00    Factor Date                  N/A
Stated Maturity                    N/A         Factor                        1           -----------------------------------------
Type                             SEN FIX       ------------------------------------------
- ----------------------------------------------



YIELD CURVE:  Spread off interpolated node
3MO=5.68, 6MO=5.68, 1YR=5.68, 2YR=6.04, 5YR=6.097, 10YR=6.196, 30YR=6.290

- -----------------------------------------------------------------------------------------------------------------------------------
 PRICE                   0 CPR              15 CPR             25 CPR                50 CPR              75 CPR             100 CPR
                         Yield
- -----------------------------------------------------------------------------------------------------------------------------------
<S>                     <C>                 <C>               <C>                    <C>                 <C>                 <C>
99.9988                 7.4622              7.4644             7.4636                7.4620              7.4616              7.4611
100.0613                7.4529              7.4551             7.4542                7.4526              7.4522              7.4516
100.1238                7.4436              7.4457             7.4449                7.4432              7.4429              7.4421
100.1863                7.4344              7.4364             7.4356                7.4339              7.4335              7.4327
100.2488                7.4251              7.4271             7.4262                7.4245              7.4241              7.4232
100.3113                7.4159              7.4178             7.4169                7.4152              7.4148              7.4137
100.3738                7.4067              7.4085             7.4076                7.4058              7.4054              7.4043
100.4363                7.3974              7.3992             7.3983                7.3965              7.3961              7.3948
100.4988                7.3882              7.3900             7.3890                7.3872              7.3867              7.3854
100.5613                7.3790              7.3807             7.3797                7.3779              7.3774              7.3759
100.6238                7.3698              7.3714             7.3704                7.3686              7.3681              7.3665
100.6863                7.3606              7.3622             7.3611                7.3593              7.3588              7.3571
100.7488                7.3514              7.3529             7.3519                7.3500              7.3494              7.3477
100.8113                7.3423              7.3437             7.3426                7.3407              7.3401              7.3383
100.8738                7.3331              7.3345             7.3334                7.3314              7.3308              7.3289
100.9363                7.3239              7.3252             7.3241                7.3221              7.3216              7.3195
100.9988                7.3148              7.3160             7.3149                7.3129              7.3123              7.3101
- ------------------------------------------------------------------------------------------------------------------------------------

- ------------------------------------------------------------------------------------------------------------------------------------
Spread @ Center Price         120               120                120                120                120               120
                  WAL       9.73355           9.64388            9.61170            9.57709            9.55601           9.40508
             Mod Durn        6.729             6.685              6.668              6.651              6.641             6.568
        Mod Convexity        0.590             0.582              0.579              0.576              0.574             0.560
     Principal Window   Sep08 to Nov09    Sep07 to Nov09     Sep07 to Nov09      Sep07 to Nov09    Aug07 to Oct09    Jul07 to Sep09
        Maturity #mos         119               119                119                119                118               117

     Accrued Interest    1,468,908.66      1,468,908.66       1,468,908.66        1,468,908.66      1,468,908.66      1,468,908.66
    Total Collat Loss    0.00 (0.00%)      0.00 (0.00%)       0.00 (0.00%)        0.00 (0.00%)      0.00 (0.00%)      0.00 (0.00%)

               Prepay      At 0 CPR          At 15 CPR          At 25 CPR          At 50 CPR          At 75 CPR        At 100 CPR
           No prepays

Lockout and penalties   Include penalty   Include penalty    Include penalty    Include penalty    Include penalty   Include penalty

Extension, if balloon        None              None               None                None              None              None
      Increase Coupon
      Pay Exten Princ

              Default      At 0 CDR          At 0 CDR           At 0 CDR            At 0 CDR          At 0 CDR          At 0 CDR
        Loss Severity          0                 0                  0                  0                  0                 0
    Servicer Advances    100% of P & I     100% of P & I      100% of P & I      100% of P & I      100% of P & I     100% of P & I
         Recovery Lag       12 mos            12 mos             12 mos              12 mos            12 mos            12 mos

  Optional Redemption

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


</TABLE>

Investors should read the Underwriters' Statement which accompanies these
Computational Materials Prospective Investors are advised to carefully read, and
should rely solely on, the final prospectus and prospectus supplement
(collectively, the "Final Prospectus") relating to the certificates referred to
herein (the "Offered Certificates") in making their investment decision. These
Computational Materials have been based upon the assumptions described above,
which most likely will not represent the actual experience of the Mortgage Pool
in the future. No representation is made herein as to the actual rate or timing
of principal payments or prepayments on any of the underlying Mortgage Loans in
the Mortgage Pool or the actual performance characteristics of the Offered
Certificates. Prior to making any investment decision, a prospective investor
should receive and fully review the Final Prospectus. NOTHING HEREIN SHOULD BE
CONSIDERED AN OFFER TO SELL OR SOLICITATION OF AN OFFER TO BUY ANY OFFERED
CERTIFICATES.



                 Generated by Intex Trader 12/14/1999 12:36 PM
 Information provided herein is believed by INTEX to be accurate; however INTEX
                           cannot guarantee accuracy.





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