PAINEWEBBER MORTGAGE ACCEPTANCE CORPORATION IV
8-K, 1998-07-30
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:  July 28, 1998
(Date of earliest event reported)

Commission File No. 333-15685

PAINEWEBBER  MORTGAGE ACCEPTANCE  CORPORATION IV (as depositor under the Pooling
and Servicing  Agreement,  dated as of July 1, 1998, relating to the PaineWebber
Mortgage Acceptance Corporation IV, Mortgage Pass-Through  Certificates,  Series
1998-1)


                 PAINEWEBBER MORTGAGE ACCEPTANCE CORPORATION IV
- --------------------------------------------------------------------------------
             (Exact name of registrant as specified in its charter)


      Delaware                                          06-1204982
- --------------------------------------------------------------------------------
(State of Incorporation)                   (I.R.S. Employer Identification No.)


1285 Avenue of the Americas
New York, New York                                      10019
- --------------------------------------------------------------------------------
(Address of principal executive offices)              (Zip Code)


                                 (212) 713-2000
- --------------------------------------------------------------------------------
              (Registrant's Telephone Number, including area code)


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



<PAGE>



Item 5.  Other Events.

         Attached as an exhibit are the  Computational  Materials and Collateral
     Term Sheets  (each as defined in the  no-action  letter  dated May 20, 1994
     issued  by the  Securities  and  Exchange  Commission  to  Kidder,  Peabody
     Acceptance  Corporation-I,  Kidder,  Peabody & Co.  Incorporated and Kidder
     Structured  Asset  Corporation  (the  "Kidder  Letter")  as  modified  by a
     no-action letter (the "First PSA No-Action  Letter") issued by the staff of
     the Commission on May 27, 1994 to the Public  Securities  Association  (the
     "PSA") and as further  modified  by a  no-action  letter  (the  "Second PSA
     No-Action Letter,") prepared by PaineWebber Incorporated,  which are hereby
     filed pursuant to such letters.



<PAGE>



ITEM 7.   Financial Statements and Exhibits

         (c) Exhibits

Item 601(a)
of Regulation S-K
Exhibit No.                                 Description
- -----------                                 -----------
         (99)                               Computational  Materials prepared by
                                            PaineWebber      Incorporated     in
                                            connection   with  the   Depositor's
                                            Mortgage Pass-Through  Certificates,
                                            Series 1998-1



<PAGE>



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


                                       PAINEWEBBER MORTGAGE ACCEPTANCE
                                        CORPORATION IV


                                       By:        /s/ Ramesh Singh
                                           ----------------------------
                                           Name:      Ramesh Singh
                                           Title:     Managing Director


Date: July 30, 1998



<PAGE>



                                INDEX TO EXHIBITS



                                                                  Paper (P) or
Exhibit No.             Description                              Electronic (E)
- -----------             -----------                              --------------

   (99)                 Computational Materials prepared by           E
                        PaineWebber Incorporated in connection
                        with the Depositor's Mortgage Pass-Through
                        Certificates, Series 1998-1







PMAC981-MKT2   30 year  7.3's
User ID: peterma                            Deals Directory: /home/peterma/DEALS
- --------------------------------------------------------------------------------
Price Yield Table Report
Date: 06/10/1998          09:44:17                                   PaineWebber
- --------------------------------------------------------------------------------
Bond: A1         Balance: 168,064,000                            Coupon: 6.75000
Delay: 24        Class Factor: 1.00      Accruing Since: 7/01/1998      "3YR SEQ
Settlement Date: 7/31/1998               WHOLE 30 year                 WAC: 7.53
WAM: 358.00      Pricing Speed: 275.00                  PSA (duration at: 99-27)
- --------------------------------------------------------------------------------
 MONTHS         CPR         CPR         CPR         CPR         CPR         CPR
                3.00        5.00        6.00       10.00       20.00       40.00
- ---------      ------      -----       -----       -----       -----       -----
  99-11         6.874      6.881       6.885       6.903       6.952       7.068
  99-12         6.869      6.875       6.878       6.893       6.935       7.031
  99-13         6.865      6.869       6.872       6.884       6.917       6.994
  99-14         6.860      6.863       6.865       6.874       6.899       6.957
  99-15         6.855      6.857       6.859       6.865       6.881       6.920
  99-16         6.850      6.851       6.852       6.855       6.863       6.882
  99-17         6.846      6.846       6.846       6.846       6.846       6.845
  99-18         6.841      6.840       6.839       6.836       6.828       6.808

  99-19         6.836      6.834       6.832       6.827       6.810       6.771
  99-20         6.831      6.828       6.826       6.817       6.792       6.734
  99-21         6.827      6.822       6.819       6.808       6.774       6.697
  99-22         6.822      6.816       6.813       6.798       6.757       6.660
  99-23         6.817      6.810       6.806       6.789       6.739       6.623
  99-24         6.813      6.804       6.800       6.779       6.721       6.586
  99-25         6.808      6.798       6.793       6.770       6.704       6.549
  99-26         6.803      6.793       6.787       6.760       6.686       6.512

  99-27         6.798      6.787       6.780       6.751       6.668       6.476
  99-28         6.794      6.781       6.774       6.741       6.650       6.439
  99-29         6.789      6.775       6.767       6.732       6.633       6.402
  99-30         6.784      6.769       6.761       6.722       6.615       6.365
  99-31         6.780      6.763       6.754       6.713       6.597       6.328
 100- 0         6.775      6.757       6.748       6.703       6.580       6.291
 100- 1         6.770      6.752       6.741       6.694       6.562       6.255
 100- 2         6.766      6.746       6.735       6.684       6.545       6.218

 100- 3         6.761      6.740       6.728       6.675       6.527       6.181
 100- 4         6.756      6.734       6.722       6.666       6.509       6.145
 100- 5         6.752      6.728       6.715       6.656       6.492       6.108
 100- 6         6.747      6.722       6.709       6.647       6.474       6.071
 100- 7         6.742      6.717       6.702       6.637       6.457       6.035
 100- 8         6.738      6.711       6.696       6.628       6.439       5.998
 100- 9         6.733      6.705       6.689       6.619       6.422       5.962
 100-10         6.728      6.699       6.683       6.609       6.404       5.925
- ---------      ------      -----       -----       -----       -----       -----
AVG LIFE       10.601      7.731       6.689       4.119       1.993       0.907
DURATION        6.624      5.303       4.773       3.287       1.760       0.844
FIRST PAY        8/98       8/98        8/98        8/98        8/98        8/98
LAST PAY         7/21       9/17       10/15        8/09        5/03        9/00

XX   The   information   herein  has  been   provided   solely  by   PaineWebber
     Incorporated.  Neither  the  issuer  of  the  certificates  nor  any of its
     affiliates makes any  representation  as to the accuracy or completeness of
     the information  herein.  The information herein is preliminary and will be
     superseded  by the  applicable  prospectus  supplement  and  by  any  other
     information subsequently filed with the securities and exchange commission.



<PAGE>



PMAC981-MKT2   30 year  7.3's
User ID: peterma                            Deals Directory: /home/peterma/DEALS
- --------------------------------------------------------------------------------
Price Yield Table Report
Date: 06/10/1998          10:47:19                                   PaineWebber
- --------------------------------------------------------------------------------
Bond: A1         Balance: 168,064,000                            Coupon: 6.75000
Delay: 24        Class Factor: 1.00      Accruing Since: 7/01/1998      "3YR SEQ
Settlement Date: 7/31/1998               WHOLE 30 year                 WAC: 7.53
WAM: 358.00      Pricing Speed: 275.00                  PSA (duration at: 99-27)
- --------------------------------------------------------------------------------
 MONTHS                  PSA                 PSA
   30                   2500                2500
   36                    275                 275
   12                    275                 600
  360                    275                 275
- ---------               -----               -----
  99-11                 7.074               7.074
  99-12                 7.036               7.036
  99-13                 6.998               6.998
  99-14                 6.959               6.959
  99-15                 6.921               6.921
  99-16                 6.883               6.883
  99-17                 6.845               6.845
  99-18                 6.807               6.807

  99-19                 6.769               6.769
  99-20                 6.731               6.731
  99-21                 6.694               6.694
  99-22                 6.656               6.656
  99-23                 6.618               6.618
  99-24                 6.580               6.580
  99-25                 6.542               6.542
  99-26                 6.504               6.504

  99-27                 6.466               6.466
  99-28                 6.429               6.429
  99-29                 6.391               6.391
  99-30                 6.353               6.353
  99-31                 6.315               6.315
 100- 0                 6.278               6.278
 100- 1                 6.240               6.240
 100- 2                 6.202               6.202

 100- 3                 6.165               6.165
 100- 4                 6.127               6.127
 100- 5                 6.090               6.090
 100- 6                 6.052               6.052
 100- 7                 6.014               6.014
 100- 8                 5.977               5.977
 100- 9                 5.939               5.939
 100-10                 5.902               5.902
- ---------               -----               -----
AVG LIFE                0.877               0.877
DURATION                0.824               0.824
FIRST PAY                8/98                8/98
LAST PAY                12/99               12/99

XX   The   information   herein  has  been   provided   solely  by   PaineWebber
     Incorporated.  Neither  the  issuer  of  the  certificates  nor  any of its
     affiliates makes any  representation  as to the accuracy or completeness of
     the information  herein.  The information herein is preliminary and will be
     superseded  by the  applicable  prospectus  supplement  and  by  any  other
     information subsequently filed with the securities and exchange commission.



<PAGE>



PMAC981-MKT3   30 year  7.3's
User ID: scutri                              Deals Directory: /home/scutri/DEALS
- --------------------------------------------------------------------------------
Price Yield Table Report
Date: 07/10/1998          14:08:57                                   PaineWebber
- --------------------------------------------------------------------------------
Bond: A4         Balance: 10,989,500                             Coupon: 7.00000
Delay: 24        Class Factor: 1.00        Accruing Since: 7/01/1998       "done
Settlement Date: 7/31/1998                 WHOLE 30 year               WAC: 7.53
WAM: 358.00      Pricing Speed: 275.00                 PSA (duration at: 100-16)
- --------------------------------------------------------------------------------
 MONTHS             PSA           PSA           PSA           PSA           PSA
                    750           800           900          1000          1200
- ---------          -----         -----         -----         -----         -----
 102-16            6.155         6.111         6.023         5.942         5.793
- ---------          -----         -----         -----         -----         -----
AVG LIFE           3.617         3.432         3.121         2.878         2.519
DURATION           3.099         2.959         2.720         2.529         2.241
FIRST PAY          11/01          9/01          6/01          3/01         12/00
LAST PAY            6/02          4/02         12/01          8/01          3/01

XX   The   information   herein  has  been   provided   solely  by   PaineWebber
     Incorporated.  Neither  the  issuer  of  the  certificates  nor  any of its
     affiliates makes any  representation  as to the accuracy or completeness of
     the information  herein.  The information herein is preliminary and will be
     superseded  by the  applicable  prospectus  supplement  and  by  any  other
     information subsequently filed with the securities and exchange commission.



<PAGE>



PMAC981-MKT3   30 year  7.3's
User ID: scutri                              Deals Directory: /home/scutri/DEALS
- --------------------------------------------------------------------------------
Price Yield Table Report
Date: 06/25/1998          16:41:48                                   PaineWebber
- --------------------------------------------------------------------------------
Bond: A3         Balance: 5,311,000                              Coupon: 7.00000
Delay: 24        Class Factor: 1.00        Accruing Since: 7/01/1998       "done
Settlement Date: 7/31/1998                 WHOLE 30 year               WAC: 7.53
WAM: 358.00      Pricing Speed: 275.00                  PSA (duration at: 98-20)
- --------------------------------------------------------------------------------
 MONTHS      PSA      PSA      PSA      PSA      PSA      PSA      PSA      PSA
             100      200      275      300      400      500      750     1000
- ---------   ------   ------   -----    -----    -----    -----    -----    -----
  98- 4      7.240    7.289   7.341    7.359    7.425    7.482    7.605    7.709
  98- 5      7.237    7.285   7.336    7.353    7.417    7.473    7.594    7.695
  98- 6      7.234    7.281   7.330    7.347    7.410    7.465    7.582    7.681
  98- 7      7.231    7.276   7.325    7.341    7.403    7.456    7.571    7.668
  98- 8      7.228    7.272   7.320    7.335    7.395    7.448    7.560    7.654
  98- 9      7.225    7.268   7.314    7.330    7.388    7.439    7.548    7.640
  98-10      7.222    7.264   7.309    7.324    7.381    7.430    7.537    7.626
  98-11      7.218    7.260   7.303    7.318    7.373    7.422    7.525    7.613

  98-12      7.215    7.255   7.298    7.312    7.366    7.413    7.514    7.599
  98-13      7.212    7.251   7.293    7.306    7.359    7.405    7.503    7.585
  98-14      7.209    7.247   7.287    7.301    7.352    7.396    7.491    7.572
  98-15      7.206    7.243   7.282    7.295    7.344    7.388    7.480    7.558
  98-16      7.203    7.239   7.276    7.289    7.337    7.379    7.469    7.544
  98-17      7.200    7.234   7.271    7.283    7.330    7.370    7.457    7.531
  98-18      7.197    7.230   7.266    7.278    7.323    7.362    7.446    7.517
  98-19      7.194    7.226   7.260    7.272    7.315    7.353    7.435    7.503

  98-20      7.190    7.222   7.255    7.266    7.308    7.345    7.423    7.489
  98-21      7.187    7.217   7.250    7.260    7.301    7.336    7.412    7.476
  98-22      7.184    7.213   7.244    7.255    7.294    7.328    7.401    7.462
  98-23      7.181    7.209   7.239    7.249    7.286    7.319    7.389    7.448
  98-24      7.178    7.205   7.233    7.243    7.279    7.311    7.378    7.435
  98-25      7.175    7.201   7.228    7.237    7.272    7.302    7.367    7.421
  98-26      7.172    7.197   7.223    7.231    7.265    7.294    7.355    7.408
  98-27      7.169    7.192   7.217    7.226    7.257    7.285    7.344    7.394

  98-28      7.166    7.188   7.212    7.220    7.250    7.276    7.333    7.380
  98-29      7.163    7.184   7.207    7.214    7.243    7.268    7.321    7.367
  98-30      7.160    7.180   7.201    7.208    7.236    7.259    7.310    7.353
  98-31      7.156    7.176   7.196    7.203    7.228    7.251    7.299    7.339
  99- 0      7.153    7.171   7.191    7.197    7.221    7.242    7.288    7.326
  99- 1      7.150    7.167   7.185    7.191    7.214    7.234    7.276    7.312
  99- 2      7.147    7.163   7.180    7.185    7.207    7.225    7.265    7.299
  99- 3      7.144    7.159   7.174    7.180    7.200    7.217    7.254    7.285
- ---------   ------   ------   -----    -----    -----    -----    -----    -----
AVG LIFE    19.081   11.201   7.900    7.195    5.397    4.435    3.215    2.611
DURATION    10.157    7.494   5.860    5.459    4.341    3.683    2.780    2.304
FIRST PAY     7/16    12/08   12/05     4/05     9/03    10/02      8/01    2/01
LAST PAY      9/18     8/10    1/07     3/06     4/04     3/03     11/01    3/01

XX   The   information   herein  has  been   provided   solely  by   PaineWebber
     Incorporated.  Neither  the  issuer  of  the  certificates  nor  any of its
     affiliates makes any  representation  as to the accuracy or completeness of
     the information  herein.  The information herein is preliminary and will be
     superseded  by the  applicable  prospectus  supplement  and  by  any  other
     information subsequently filed with the securities and exchange commission.



<PAGE>



PMAC981   30 year  7.3's
User ID: scutri                              Deals Directory: /home/scutri/DEALS
- --------------------------------------------------------------------------------
Price Yield Table Report
Date: 06/29/1998          17:08:57                                   PaineWebber
- --------------------------------------------------------------------------------
Bond: A3                      Balance: 5,311,000                 Coupon: 7.00000
Delay: 24                     Class Factor: 1.00       Accruing Since: 7/01/1998
Settlement Date: 7/31/1998    WHOLE 30 year                            WAC: 7.53
WAM: 358.00                   Pricing Speed: 275.00     PSA (duration at: 99-16)
- --------------------------------------------------------------------------------
 MONTHS     PSA     PSA     PSA     PSA     PSA     PSA     PSA     PSA     PSA
            100     200     250     300     400     500     750    1000    1250
- ---------  ------  ------  -----   -----   -----   -----   -----   -----   -----
  98- 0     7.253   7.306  7.343   7.382   7.454   7.516   7.651   7.764   7.855
  98- 3     7.243   7.293  7.328   7.364   7.432   7.491   7.616   7.723   7.808
  98- 6     7.234   7.281  7.313   7.347   7.410   7.465   7.582   7.681   7.761
  98- 9     7.225   7.268  7.298   7.330   7.388   7.439   7.548   7.640   7.714
  98-12     7.215   7.255  7.283   7.312   7.366   7.413   7.514   7.599   7.667
  98-15     7.206   7.243  7.268   7.295   7.344   7.388   7.480   7.558   7.620
  98-18     7.197   7.230  7.253   7.278   7.323   7.362   7.446   7.517   7.574
  98-21     7.187   7.217  7.239   7.260   7.301   7.336   7.412   7.476   7.527

  98-24     7.178   7.205  7.224   7.243   7.279   7.311   7.378   7.435   7.480
  98-27     7.169   7.192  7.209   7.226   7.257   7.285   7.344   7.394   7.434
  98-30     7.160   7.180  7.194   7.208   7.236   7.259   7.310   7.353   7.387
  99- 1     7.150   7.167  7.179   7.191   7.214   7.234   7.276   7.312   7.341
  99- 4     7.141   7.155  7.164   7.174   7.192   7.208   7.243   7.271   7.295
  99- 7     7.132   7.142  7.149   7.157   7.171   7.183   7.209   7.231   7.248
  99-10     7.123   7.130  7.135   7.140   7.149   7.157   7.175   7.190   7.202
  99-13     7.113   7.117  7.120   7.123   7.128   7.132   7.141   7.149   7.156

  99-16     7.104   7.105  7.105   7.105   7.106   7.107   7.108   7.109   7.110
  99-19     7.095   7.092  7.090   7.088   7.084   7.081   7.074   7.068   7.064
  99-22     7.086   7.080  7.076   7.071   7.063   7.056   7.041   7.028   7.017
  99-25     7.077   7.067  7.061   7.054   7.042   7.031   7.007   6.987   6.971
  99-28     7.068   7.055  7.046   7.037   7.020   7.005   6.974   6.947   6.926
  99-31     7.058   7.043  7.031   7.020   6.999   6.980   6.940   6.907   6.880
 100- 2     7.049   7.030  7.017   7.003   6.977   6.955   6.907   6.866   6.834
 100- 5     7.040   7.018  7.002   6.986   6.956   6.930   6.873   6.826   6.788

 100- 8     7.031   7.005  6.988   6.969   6.935   6.904   6.840   6.786   6.742
 100-11     7.022   6.993  6.973   6.952   6.913   6.879   6.807   6.746   6.697
 100-14     7.013   6.981  6.958   6.935   6.892   6.854   6.774   6.706   6.651
 100-17     7.004   6.969  6.944   6.918   6.871   6.829   6.740   6.665   6.606
 100-20     6.995   6.956  6.929   6.901   6.849   6.804   6.707   6.625   6.560
 100-23     6.986   6.944  6.915   6.884   6.828   6.779   6.674   6.585   6.515
 100-26     6.977   6.932  6.900   6.868   6.807   6.754   6.641   6.546   6.469
 100-29     6.968   6.919  6.886   6.851   6.786   6.729   6.608   6.506   6.424
- ---------  ------  ------  -----   -----   -----   -----   -----   -----   -----
AVG LIFE   19.081  11.201  8.782   7.195   5.397   4.435   3.215   2.611   2.270
DURATION   10.199   7.515  6.350   5.471   4.350   3.690   2.786   2.309   2.031
FIRST PAY    7/16   12/08   9/06    4/05    9/03   10/02    8/01    2/01   10/00
LAST PAY     9/18    8/10   1/08    3/06    4/04    3/03   11/01    3/01   11/00

XX   The   information   herein  has  been   provided   solely  by   PaineWebber
     Incorporated.  Neither  the  issuer  of  the  certificates  nor  any of its
     affiliates makes any  representation  as to the accuracy or completeness of
     the information  herein.  The information herein is preliminary and will be
     superseded  by the  applicable  prospectus  supplement  and  by  any  other
     information subsequently filed with the securities and exchange commission.



<PAGE>



PMAC981   30 year  7.3's
User ID: scutri                              Deals Directory: /home/scutri/DEALS
- --------------------------------------------------------------------------------
Price Yield Table Report
Date: 06/29/1998          17:08:57                                   PaineWebber
- --------------------------------------------------------------------------------
Bond: A3                      Balance: 5,311,000                 Coupon: 7.00000
Delay: 24                     Class Factor: 1.00       Accruing Since: 7/01/1998
Settlement Date: 7/31/1998    WHOLE 30 year                            WAC: 7.53
WAM: 358.00                   Pricing Speed: 275.00     PSA (duration at: 99-16)
- --------------------------------------------------------------------------------
 MONTHS     PSA     PSA     PSA     PSA     PSA     PSA     PSA     PSA     PSA
            100     200     250     300     400     500     750    1000    1250
- ---------  ------  ------  -----   -----   -----   -----   -----   -----   -----
  101-0     6.959   6.907  6.871   6.834   6.765   6.704   6.575   6.466   6.379
- ---------  ------  ------  -----   -----   -----   -----   -----   -----   -----
AVG LIFE   19.081  11.201  8.782   7.195   5.397   4.435   3.215   2.611   2.270
DURATION   10.199   7.515  6.350   5.471   4.350   3.690   2.786   2.309   2.031
FIRST PAY    7/16   12/08   9/06    4/05    9/03   10/02    8/01    2/01   10/00
LAST PAY     9/18    8/10   1/08    3/06    4/04    3/03   11/01    3/01   11/00

XX   The   information   herein  has  been   provided   solely  by   PaineWebber
     Incorporated.  Neither  the  issuer  of  the  certificates  nor  any of its
     affiliates makes any  representation  as to the accuracy or completeness of
     the information  herein.  The information herein is preliminary and will be
     superseded  by the  applicable  prospectus  supplement  and  by  any  other
     information subsequently filed with the securities and exchange commission.



<PAGE>



PMAC981-MKT3   30 year  7.3's
User ID: scutri                              Deals Directory: /home/scutri/DEALS
- --------------------------------------------------------------------------------
Price Yield Table Report
Date: 07/09/1998          11:21:37                                   PaineWebber
- --------------------------------------------------------------------------------
Bond: A4         Balance: 10,989,500                             Coupon: 7.00000
Delay: 24        Class Factor: 1.00        Accruing Since: 7/01/1998       "done
Settlement Date: 7/31/1998                 WHOLE 30 year               WAC: 7.53
WAM: 358.00      Pricing Speed: 275.00                  PSA (duration at: 100-0)
- --------------------------------------------------------------------------------
 MONTHS      PSA      PSA      PSA      PSA      PSA      PSA      PSA      PSA
             100      150      200      275      300      400      500      600
- ---------   ------   ------   ------   ------   -----    -----    -----    -----
  98- 0      7.242    7.256    7.275    7.316   7.333    7.404    7.468    7.522
  98- 4      7.230    7.243    7.261    7.298   7.314    7.379    7.437    7.487
  98- 8      7.219    7.230    7.247    7.281   7.294    7.354    7.407    7.453
  96-12      7.207    7.217    7.232    7.263   7.275    7.329    7.377    7.418
  98-16      7.195    7.205    7.218    7.245   7.256    7.304    7.346    7.383
  98-20      7.184    7.192    7.204    7.227   7.237    7.279    7.316    7.348
  98-24      7.172    7.180    7.189    7.210   7.218    7.254    7.286    7.314
  98-28      7.161    7.167    7.175    7.192   7.199    7.229    7.256    7.279

  99- 0      7.150    7.154    7.161    7.175   7.180    7.204    7.226    7.244
  99- 4      7.138    7.142    7.147    7.157   7.161    7.180    7.196    7.210
  99- 8      7.127    7.129    7.133    7.140   7.143    7.155    7.166    7.175
  99-12      7.115    7.117    7.119    7.122   7.124    7.130    7.136    7.141
  99-16      7.104    7.104    7.104    7.105   7.105    7.106    7.106    7.107
  99-20      7.093    7.092    7.090    7.087   7.086    7.081    7.076    7.072
  99-24      7.081    7.079    7.076    7.070   7.067    7.056    7.047    7.038
  99-28      7.070    7.067    7.062    7.053   7.049    7.032    7.017    7.004

 100- 0      7.059    7.055    7.048    7.035   7.030    7.007    6.987    6.970
 100- 4      7.048    7.042    7.034    7.018   7.011    6.983    6.957    6.936
 100- 8      7.037    7.030    7.020    7.001   6.993    6.959    6.928    6.902
 100-12      7.025    7.017    7.006    6.983   6.974    6.934    6.898    6.868
 100-16      7.014    7.005    6.992    6.966   6.955    6.910    6.869    6.834
 100-20      7.003    6.993    6.978    6.949   6.937    6.886    6.839    6.800
 100-24      6.992    6.981    6.965    6.932   6.918    6.861    6.810    6.766
 100-28      6.981    6.968    6.951    6.915   6.900    6.837    6.781    6.732

 101- 0      6.970    6.956    6.937    6.898   6.881    6.813    6.751    6.698
 101- 4      6.959    6.944    6.923    6.881   6.863    6.789    6.722    6.665
 101- 8      6.948    6.932    6.909    6.864   6.845    6.765    6.693    6.631
 101-12      6.937    6.920    6.896    6.847   6.826    6.741    6.663    6.598
 101-16      6.926    6.907    6.882    6.830   6.808    6.717    6.634    6.564
 101-20      6.915    6.895    6.868    6.813   6.790    6.693    6.605    6.531
 101-24      6.904    6.883    6.854    6.796   6.771    6.669    6.576    6.497
 101-28      6.893    6.871    6.841    6.779   6.753    6.645    6.547    6.464
- ---------   ------   ------   ------   ------   -----    -----    -----    -----
AVG LIFE    22.802   18.455   14.689   10.489   9.398    6.540    5.151    4.364
DURATION    11.051   10.031    8.872    7.177   6.653    5.080    4.188    3.643
FIRST PAY     9/18     2/14     8/10     1/07    3/06     4/04     3/03     7/02
LAST PAY      3/24     7/20     8/16    11/11    7/10     3/06     5/04     5/03

XX   The   information   herein  has  been   provided   solely  by   PaineWebber
     Incorporated.  Neither  the  issuer  of  the  certificates  nor  any of its
     affiliates makes any  representation  as to the accuracy or completeness of
     the information  herein.  The information herein is preliminary and will be
     superseded  by the  applicable  prospectus  supplement  and  by  any  other
     information subsequently filed with the securities and exchange commission.



<PAGE>



PMAC981-MKT3   30 year  7.3's
User ID: scutri                              Deals Directory: /home/scutri/DEALS
- --------------------------------------------------------------------------------
Price Yield Table Report
Date: 07/09/1998          11:21:37                                   PaineWebber
- --------------------------------------------------------------------------------
Bond: A4                      Balance: 10,989,500                Coupon: 7.00000
Delay: 24                     Class Factor: 1.00       Accruing Since: 7/01/1998
Settlement Date: 7/31/1998    WHOLE 30 year                            WAC: 7.53
WAM: 358.00                   Pricing Speed: 275.00     PSA (duration at: 100-0)
- --------------------------------------------------------------------------------
MONTHS       PSA      PSA      PSA      PSA      PSA      PSA      PSA      PSA
             100      150      200      275      300      400      500      600
- ---------   ------   ------   ------   ------   -----    -----    -----    -----
  102-0      6.882    6.859    6.827    6.762   6.735    6.621    6.518    6.431
- ---------   ------   ------   ------   ------   -----    -----    -----    -----
AVG LIFE    22.802   18.455   14.689   10.489   9.398    6.540    5.151    4.364
DURATION    11.051   10.031    8.872    7.177   6.653    5.080    4.188    3.643
FIRST PAY     9/18     2/14     8/10     1/07    3/06     4/04     3/03     7/02
LAST PAY      3/24     7/20     8/16    11/11    7/10     3/06     5/04     5/03

XX   The   information   herein  has  been   provided   solely  by   PaineWebber
     Incorporated.  Neither  the  issuer  of  the  certificates  nor  any of its
     affiliates makes any  representation  as to the accuracy or completeness of
     the information  herein.  The information herein is preliminary and will be
     superseded  by the  applicable  prospectus  supplement  and  by  any  other
     information subsequently filed with the securities and exchange commission.



<PAGE>



PMAC981-MKT3   30 year  7.3's
User ID: scutri                              Deals Directory: /home/scutri/DEALS
- --------------------------------------------------------------------------------
Price Yield Table Report
Date: 07/10/1998          14:08:57                                   PaineWebber
- --------------------------------------------------------------------------------
Bond: A4                      Balance: 10,989,500                Coupon: 7.00000
Delay: 24                     Class Factor: 1.00       Accruing Since: 7/01/1998
Settlement Date: 7/31/1998    WHOLE 30 year                            WAC: 7.53
WAM: 358.00                   Pricing Speed: 275.00     PSA (duration at: 100-8)
- --------------------------------------------------------------------------------
 MONTHS             PSA           PSA           PSA           PSA           PSA
                    750           800           900          1000          1200
- ---------          -----         -----         -----         -----         -----
  98-16            7.432         7.448         7.479         7.507         7.559
  98-20            7.392         7.405         7.432         7.457         7.502
  98-24            7.351         7.363         7.385         7.407         7.446
  98-28            7.310         7.320         7.339         7.357         7.390
  99- 0            7.269         7.277         7.293         7.307         7.333
  99- 4            7.229         7.235         7.246         7.257         7.277
  99- 8            7.188         7.192         7.200         7.207         7.221
  99-12            7.148         7.150         7.154         7.158         7.165

  99-16            7.107         7.108         7.108         7.108         7.109
  99-20            7.067         7.065         7.062         7.059         7.053
  99-24            7.027         7.023         7.016         7.009         6.997
  99-28            6.986         6.981         6.970         6.960         6.942
 100- 0            6.946         6.939         6.924         6.911         6.886
 100- 4            6.906         6.897         6.879         6.862         6.831
 100- 8            6.866         6.855         6.833         6.813         6.775
 100-12            6.826         6.813         6.787         6.764         6.720

 100-16            6.786         6.771         6.742         6.715         6.665
 100-20            6.746         6.729         6.696         6.666         6.610
 100-24            6.706         6.688         6.651         6.617         6.555
 100-28            6.667         6.646         6.606         6.568         6.500
 101- 0            6.627         6.604         6.561         6.520         6.445
 101- 4            6.587         6.563         6.515         6.471         6.390
 101- 8            6.548         6.522         6.470         6.423         6.335
 101-12            6.508         6.480         6.425         6.374         6.281

 101-16            6.469         6.439         6.380         6.326         6.226
 101-20            6.429         6.398         6.336         6.278         6.172
 101-24            6.390         6.356         6.291         6.229         6.117
 101-28            6.351         6.315         6.246         6.181         6.063
 102- 0            6.312         6.274         6.201         6.133         6.009
 102- 4            6.273         6.233         6.157         6.085         5.955
 102- 8            6.233         6.192         6.112         6.037         5.901
 102-12            6.194         6.151         6.068         5.990         5.847
- ---------          -----         -----         -----         -----         -----
AVG LIFE           3.617         3.432         3.121         2.878         2.519
DURATION           3.099         2.959         2.720         2.529         2.241
FIRST PAY          11/01          9/01          6/01          3/01         12/00
LAST PAY            6/02          4/02         12/01          8/01          3/01

XX   The   information   herein  has  been   provided   solely  by   PaineWebber
     Incorporated.  Neither  the  issuer  of  the  certificates  nor  any of its
     affiliates makes any  representation  as to the accuracy or completeness of
     the information  herein.  The information herein is preliminary and will be
     superseded  by the  applicable  prospectus  supplement  and  by  any  other
     information subsequently filed with the securities and exchange commission.



<PAGE>



PMAC981-MKT3   30 year  7.3's
User ID: scutri                              Deals Directory: /home/scutri/DEALS
- --------------------------------------------------------------------------------
Price Yield Table Report
Date: 07/10/1998          15:23:09                                   PaineWebber
- --------------------------------------------------------------------------------
Bond: A4         Balance: 10,989,500                             Coupon: 7.00000
Delay: 24        Class Factor: 1.00        Accruing Since: 7/01/1998       "done
Settlement Date: 7/31/1998                 WHOLE 30 year               WAC: 7.53
WAM: 358.00      Pricing Speed: 275.00                 PSA (duration at: 100-24)
- --------------------------------------------------------------------------------
 MONTHS        PSA       PSA       PSA       PSA        PSA       PSA       PSA
               100       150       200       275        500       600       800
- ---------     ------    ------    ------    ------     -----     -----     -----
  99- 0        7.150     7.154     7.161     7.175     7.226     7.244     7.277
  99- 8        7.127     7.129     7.133     7.140     7.166     7.175     7.192
  99-16        7.104     7.104     7.104     7.105     7.106     7.107     7.108
  99-24        7.081     7.079     7.076     7.070     7.047     7.038     7.023
 100- 0        7.059     7.055     7.048     7.035     6.987     6.970     6.939
 100- 8        7.037     7.030     7.020     7.001     6.928     6.902     6.855
 100-16        7.014     7.005     6.992     6.966     6.869     6.834     6.771
 100-24        6.992     6.981     6.965     6.932     6.810     6.766     6.688

 101- 0        6.970     6.956     6.937     6.898     6.751     6.698     6.604
 101- 8        6.948     6.932     6.909     6.864     6.693     6.631     6.522
 101-16        6.926     6.907     6.882     6.830     6.634     6.564     6.439
 101-24        6.904     6.883     6.854     6.796     6.576     6.497     6.356
 102- 0        6.882     6.859     6.827     6.762     6.518     6.431     6.274
 102- 8        6.860     6.835     6.800     6.728     6.460     6.364     6.192
 102-16        6.838     6.811     6.773     6.695     6.403     6.298     6.111
- ---------     ------    ------    ------    ------     -----     -----     -----
AVG LIFE      22.802    18.455    14.689    10.489     5.151     4.364     3.432
DURATION      11.095    10.065     8.898     7.194     4.196     3.649     2.961
FIRST PAY       9/18      2/14      8/10      1/07      3/03      7/02      9/01
LAST PAY        3/24      7/20      8/16     11/11      5/04      5/03      4/02

XX   The   information   herein  has  been   provided   solely  by   PaineWebber
     Incorporated.  Neither  the  issuer  of  the  certificates  nor  any of its
     affiliates makes any  representation  as to the accuracy or completeness of
     the information  herein.  The information herein is preliminary and will be
     superseded  by the  applicable  prospectus  supplement  and  by  any  other
     information subsequently filed with the securities and exchange commission.



<PAGE>



PMAC981-MKT3   30 year  7.3's
User ID: scutri                              Deals Directory: /home/scutri/DEALS
- --------------------------------------------------------------------------------
Price Yield Table Report
Date: 07/10/1998          13:41:52                                   PaineWebber
- --------------------------------------------------------------------------------
Bond: A4                      Balance: 10,989,500                Coupon: 7.00000
Delay: 24                     Class Factor: 1.00       Accruing Since: 7/01/1998
Settlement Date: 7/31/1998    WHOLE 30 year                            WAC: 7.53
WAM: 358.00                   Pricing Speed: 275.00    PSA (duration at: 100-18)
- --------------------------------------------------------------------------------
 MONTHS             PSA           PSA           PSA           PSA           PSA
                    750           900          1000          1200           750
- ---------          -----         -----         -----         -----         -----
  98-16            7.432         7.479         7.507         7.559         7.432
  98-20            7.392         7.432         7.457         7.502         7.392
  98-24            7.351         7.385         7.407         7.446         7.351
  98-28            7.310         7.339         7.357         7.390         7.310
  99- 0            7.269         7.293         7.307         7.333         7.269
  99- 4            7.229         7.246         7.257         7.277         7.229
  99- 8            7.188         7.200         7.207         7.221         7.188
  99-12            7.148         7.154         7.158         7.165         7.148

  99-16            7.107         7.108         7.108         7.109         7.107
  99-20            7.067         7.062         7.059         7.053         7.067
  99-24            7.027         7.016         7.009         6.997         7.027
  99-28            6.986         6.970         6.960         6.942         6.986
 100- 0            6.946         6.924         6.911         6.886         6.946
 100- 4            6.906         6.879         6.862         6.831         6.906
 100- 8            6.866         6.833         6.813         6.775         6.866
 100-12            6.826         6.787         6.764         6.720         6.826

 100-16            6.786         6.742         6.715         6.665         6.786
 100-20            6.746         6.696         6.666         6.610         6.746
 100-24            6.706         6.651         6.617         6.555         6.706
 100-28            6.667         6.606         6.568         6.500         6.667
 101- 0            6.627         6.561         6.520         6.445         6.627
 101- 4            6.587         6.515         6.471         6.390         6.587
 101- 8            6.548         6.470         6.423         6.335         6.548
 101-12            6.508         6.425         6.374         6.281         6.508

 101-16            6.469         6.380         6.326         6.226         6.469
 101-20            6.429         6.336         6.278         6.172         6.429
 101-24            6.390         6.291         6.229         6.117         6.390
 101-28            6.351         6.246         6.181         6.063         6.351
 102- 0            6.312         6.201         6.133         6.009         6.312
- ---------          -----         -----         -----         -----         -----
AVG LIFE           3.617         3.121         2.878         2.519         3.617
STATION            3.097         2.718         2.527         2.239         3.097
FIRST PAY          11/01          6/01          3/01         12/00         11/01
LAST PAY            6/02         12/01          8/01          3/01          6/02

XX   The   information   herein  has  been   provided   solely  by   PaineWebber
     Incorporated.  Neither  the  issuer  of  the  certificates  nor  any of its
     affiliates makes any  representation  as to the accuracy or completeness of
     the information  herein.  The information herein is preliminary and will be
     superseded  by the  applicable  prospectus  supplement  and  by  any  other
     information subsequently filed with the securities and exchange commission.



<PAGE>



PMAC981-A5   6.456%   1 MONTHLIB + 0.800% WL 7.26 30YR
- --------------------------------------------------------------------------------
            Deal                         Tranche            Aggregate Collateral
- ----------------------------    -------------------------   --------------------
Name:               PMAC981     Type:           NA/FLT
Underwriter:                    Coupon:         6.456
Frequency:          12          Factor:         1.000000
Last Payment:       07/25/98    Orig. Balance:  9,702,375    MULTIPLE
Collateral Source:  GENERIC     Curr Balance:   9,702,375             COLLATERAL
                                Delay:          0
                                CUSIP:
                                Cap@Idx:        9%@8.2%
                                Floor@Idx:      0%@0%
- --------------------------------------------------------------------------------
<TABLE>
<CAPTION>
                                                           Discount Margin
- ------------------------------------------------------------------------------------------------------------------------------------
Price        PSA      100          150          200          275          300          400          500          700          900
- ---------           --------     --------     --------     --------     --------     --------     --------     --------     --------
<S>                 <C>          <C>          <C>          <C>          <C>          <C>          <C>          <C>          <C>
101:14               69           68           68           66           66           61           53           43           35
101:16               68           68           67           66           65           60           52           41           33
101:18               68           68           67           65           64           59           51           40           31
101:20               68           67           66           64           64           58           50           38           29
101:22               67           67           66           64           63           58           48           37           27
101:24               67           66           65           63           62           57           47           35           25
101:26               66           66           65           63           62           56           46           34           23
101:28               66           65           64           62           61           55           45           32           21
101:30               65           65           64           62           61           54           44           30           20
                    --------     --------     --------     --------     --------     --------     --------     --------     --------
Avg Life             27.70        25.38        22.29        17.51        16.03        10.49         6.50         4.45         3.56
Mod Dur*             12.65        12.21        11.50        10.14         9.63         7.30         5.17         3.77         3.10

First Pay           03/25/24     07/25/20     08/25/16     11/25/11     07/25/10     03/25/06     05/25/04     09/25/02     12/25/01
Last Pay            05/25/28     05/25/28     05/25/28     05/25/28     05/25/28     05/25/28     01/25/06     04/25/03     04/25/02
- ------------------------------------------------------------------------------------------------------------------------------------
<FN>
Trade: 07/10/98, Sett: 07/30/98,* - Based on Px 101:22
Default Pricing: Idx 5.656, idx 1MONTHLIB
Calc Model: KPCMO Cashflow pwpp0ECONOMICPREPAY

XX   The   information   herein  has  been   provided   solely  by   PaineWebber
     Incorporated.  Neither  the  issuer  of  the  certificates  nor  any of its
     affiliates makes any  representation  as to the accuracy or completeness of
     the information  herein.  The information herein is preliminary and will be
     superseded  by the  applicable  prospectus  supplement  and  by  any  other
     information subsequently filed with the securities and exchange commission.
</FN>
</TABLE>



<PAGE>



PMAC981-HDG3   30 year  7.3's
User ID: peterma                            Deals Directory: /home/peterma/DEALS
- --------------------------------------------------------------------------------
Price Yield Table Report
Date: 06/24/1998          16:15:44                                   PaineWebber
- --------------------------------------------------------------------------------
Bond: A4                      Balance: 10,989,500                Coupon: 7.00000
Delay: 24                     Class Factor: 1.00       Accruing Since: 7/01/1998
Settlement Date: 7/30/1998    WHOLE 30 year                            WAC: 7.53
WAM: 358.00                   Pricing Speed: 275.00      PSA (duration at: 99-8)
- --------------------------------------------------------------------------------
 MONTHS        PSA       PSA       PSA       PSA        PSA       PSA       PSA
               100       150       200       275        300       400       500
- ---------     ------    ------    ------    ------     -----     -----     -----
  98- 0        7.243     7.258     7.278     7.319     7.336     7.408     7.472
  98- 4        7.232     7.245     7.263     7.301     7.317     7.383     7.442
  98- 8        7.220     7.232     7.249     7.283     7.297     7.358     7.412
  98-12        7.209     7.219     7.235     7.266     7.278     7.333     7.381
  98-16        7.197     7.207     7.220     7.248     7.259     7.308     7.351
  98-20        7.186     7.194     7.206     7.230     7.240     7.283     7.321
  98-24        7.174     7.181     7.192     7.213     7.221     7.258     7.291
  98-28        7.163     7.169     7.177     7.195     7.202     7.233     7.261

  99- 0        7.151     7.156     7.163     7.177     7.183     7.208     7.231
  99- 4        7.140     7.144     7.149     7.160     7.164     7.183     7.201
  99- 8        7.129     7.131     7.135     7.142     7.146     7.159     7.171
  99-12        7.117     7.119     7.121     7.125     7.127     7.134     7.141
  99-16        7.106     7.106     7.107     7.107     7.108     7.109     7.111
  99-20        7.095     7.094     7.093     7.090     7.089     7.085     7.081
  99-24        7.083     7.081     7.078     7.073     7.070     7.060     7.051
  99-28        7.072     7.069     7.064     7.055     7.052     7.036     7.021

 100- 0        7.061     7.056     7.050     7.038     7.033     7.011     6.992
 100- 4        7.049     7.044     7.036     7.021     7.014     6.987     6.962
 100- 8        7.038     7.032     7.022     7.003     6.996     6.962     6.932
 100-12        7.027     7.019     7.008     6.986     6.977     6.938     6.903
 100-16        7.016     7.007     6.995     6.969     6.958     6.914     6.873
- ---------     ------    ------    ------    ------     -----     -----     -----
AVG LIFE      22.802    18.455    14.689    10.489     9.398     6.540     5.151
DURATION      11.006     9.996     8.846     7.160     6.638     5.071     4.181
FIRST PAY       9/18      2/14      8/10      1/07      3/06      4/04      3/03
LAST PAY        3/24      7/20      8/16     11/11      7/10      3/06      5/04

XX   The   information   herein  has  been   provided   solely  by   PaineWebber
     Incorporated.  Neither  the  issuer  of  the  certificates  nor  any of its
     affiliates makes any  representation  as to the accuracy or completeness of
     the information  herein.  The information herein is preliminary and will be
     superseded  by the  applicable  prospectus  supplement  and  by  any  other
     information subsequently filed with the securities and exchange commission.



<PAGE>



PMAC981-HDG3   30 year  7.3's
User ID: peterma                            Deals Directory: /home/peterma/DEALS
- --------------------------------------------------------------------------------
Price Yield Table Report
Date: 06/24/1998          16:14:28                                   PaineWebber
- --------------------------------------------------------------------------------
Bond: A3                      Balance: 5,311,000                 Coupon: 7.00000
Delay: 24                     Class Factor: 1.00       Accruing Since: 7/01/1998
Settlement Date: 7/30/1998    WHOLE 30 year                            WAC: 7.53
WAM: 358.00                   Pricing Speed: 275.00     PSA (duration at: 99-24)
- --------------------------------------------------------------------------------
 MONTHS        PSA       PSA       PSA        PSA       PSA       PSA       PSA
               100       150       200        275       300       400       500
- ---------     ------    ------    ------     -----     -----     -----     -----
  98-16        7.205     7.221     7.241     7.280     7.293     7.342     7.384
  98-20        7.192     7.206     7.224     7.258     7.270     7.313     7.350
  98-24        7.180     7.192     7.208     7.237     7.247     7.284     7.316
  98-28        7.168     7.178     7.191     7.215     7.224     7.255     7.282
  99- 0        7.155     7.163     7.174     7.194     7.201     7.226     7.248
  99- 4        7.143     7.149     7.157     7.172     7.178     7.197     7.214
  99- 8        7.131     7.135     7.141     7.151     7.155     7.168     7.180
  99-12        7.118     7.121     7.124     7.130     7.132     7.139     7.146

  99-16        7.106     7.107     7.107     7.109     7.109     7.110     7.112
  99-20        7.094     7.092     7.091     7.087     7.086     7.082     7.078
  99-24        7.082     7.078     7.074     7.066     7.063     7.053     7.044
  99-28        7.069     7.064     7.058     7.045     7.041     7.025     7.011
 100- 0        7.057     7.050     7.041     7.024     7.018     6.996     6.977
 100- 4        7.045     7.036     7.025     7.003     6.995     6.967     6.943
 100- 8        7.033     7.022     7.008     6.981     6.973     6.939     6.910
 100-12        7.021     7.008     6.992     6.960     6.950     6.911     6.876

 100-16        7.009     6.994     6.975     6.939     6.927     6.882     6.843
 100-20        6.997     6.980     6.959     6.918     6.905     6.854     6.809
 100-24        6.985     6.966     6.942     6.897     6.882     6.826     6.776
 100-28        6.973     6.952     6.926     6.877     6.860     6.797     6.743
 101- 0        6.961     6.939     6.910     6.856     6.837     6.769     6.709
- ---------     ------    ------    ------     -----     -----     -----     -----
AVG LIFE      19.081    14.535    11.201     7.900     7.195     5.397     4.435
DURATION      10.210     8.840     7.521     5.877     5.474     4.353     3.692
FIRST PAY       7/16      2/12     12/08     12/05      4/05      9/03     10/02
LAST PAY        9/18      2/14      8/10      1/07      3/06      4/04      3/03

XX   The   information   herein  has  been   provided   solely  by   PaineWebber
     Incorporated.  Neither  the  issuer  of  the  certificates  nor  any of its
     affiliates makes any  representation  as to the accuracy or completeness of
     the information  herein.  The information herein is preliminary and will be
     superseded  by the  applicable  prospectus  supplement  and  by  any  other
     information subsequently filed with the securities and exchange commission.



<PAGE>



PMAC981-MKT3   30 year  7.3's
User ID: scutri                              Deals Directory: /home/scutri/DEALS
- --------------------------------------------------------------------------------
Price Yield Table Report
Date: 06/25/1998          16:40:29                                   PaineWebber
- --------------------------------------------------------------------------------
Bond: A4         Balance: 10,989,500                             Coupon: 7.00000
Delay: 24        Class Factor: 1.00        Accruing Since: 7/01/1998       "done
Settlement Date: 7/31/1998                 WHOLE 30 year               WAC: 7.53
WAM: 358.00      Pricing Speed: 275.00                   PSA (duration at: 98-8)
- --------------------------------------------------------------------------------
 MONTHS      PSA      PSA      PSA      PSA      PSA      PSA      PSA      PSA
             100      200      275      300      400      500      750     1000
- ---------   ------   ------   ------   -----    -----    -----    -----    -----
  97-24      7.265    7.304    7.352   7.371    7.454    7.529    7.679    7.809
  97-25      7.262    7.301    7.347   7.366    7.448    7.521    7.669    7.797
  97-26      7.259    7.297    7.343   7.362    7.441    7.513    7.658    7.784
  97-27      7.256    7.293    7.338   7.357    7.435    7.506    7.648    7.771
  97-28      7.253    7.290    7.334   7.352    7.429    7.498    7.638    7.759
  97-29      7.250    7.286    7.329   7.347    7.423    7.491    7.627    7.746
  97-30      7.247    7.283    7.325   7.342    7.416    7.483    7.617    7.733
  97-31      7.245    7.279    7.320   7.338    7.410    7.475    7.607    7.721

  98- 0      7.242    7.275    7.316   7.333    7.404    7.468    7.597    7.708
  98- 1      7.239    7.272    7.312   7.328    7.397    7.460    7.586    7.696
  98- 2      7.236    7.268    7.307   7.323    7.391    7.453    7.576    7.683
  98- 3      7.233    7.265    7.303   7.318    7.385    7.445    7.566    7.670
  98- 4      7.230    7.261    7.298   7.314    7.379    7.437    7.555    7.658
  98- 5      7.227    7.257    7.294   7.309    7.372    7.430    7.545    7.645
  98- 6      7.224    7.254    7.289   7.304    7.366    7.422    7.535    7.633
  98- 7      7.221    7.250    7.285   7.299    7.360    7.415    7.525    7.620

  98- 8      7.219    7.247    7.281   7.294    7.354    7.407    7.514    7.607
  98- 9      7.216    7.243    7.276   7.290    7.347    7.399    7.504    7.595
  98-10      7.213    7.240    7.272   7.285    7.341    7.392    7.494    7.582
  98-11      7.210    7.236    7.267   7.280    7.335    7.384    7.484    7.570
  98-12      7.207    7.232    7.263   7.275    7.329    7.377    7.473    7.557
  98-13      7.204    7.229    7.258   7.271    7.322    7.369    7.463    7.545
  98-14      7.201    7.225    7.254   7.266    7.316    7.362    7.453    7.532
  98-15      7.198    7.222    7.250   7.261    7.310    7.354    7.443    7.519

  98-16      7.195    7.218    7.245   7.256    7.304    7.346    7.432    7.507
  98-17      7.193    7.214    7.241   7.252    7.297    7.339    7.422    7.494
  98-18      7.190    7.211    7.236   7.247    7.291    7.331    7.412    7.482
  98-19      7.187    7.207    7.232   7.242    7.285    7.324    7.402    7.469
  98-20      7.184    7.204    7.227   7.237    7.279    7.316    7.392    7.457
  98-21      7.181    7.200    7.223   7.233    7.273    7.309    7.381    7.444
  98-22      7.178    7.197    7.219   7.228    7.266    7.301    7.371    7.432
  98-23      7.175    7.193    7.214   7.223    7.260    7.294    7.361    7.419
- ---------   ------   ------   ------   -----    -----    -----    -----    -----
AVG LIFE    22.802   14.689   10.489   9.398    6.540    5.151    3.617    2.878
DURATION    10.948    8.811    7.137   6.618    5.058    4.171    3.083    2.514
FIRST PAY     9/18     8/10     1/07    3/06     4/04     3/03    11/01     3/01
LAST PAY      3/24     8/16    11/11    7/10     3/06     5/04     6/02     8/01

XX   The   information   herein  has  been   provided   solely  by   PaineWebber
     Incorporated.  Neither  the  issuer  of  the  certificates  nor  any of its
     affiliates makes any  representation  as to the accuracy or completeness of
     the information  herein.  The information herein is preliminary and will be
     superseded  by the  applicable  prospectus  supplement  and  by  any  other
     information subsequently filed with the securities and exchange commission.



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